1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*******************************************************************************
3 * Filename: target_core_configfs.c
4 *
5 * This file contains ConfigFS logic for the Generic Target Engine project.
6 *
7 * (c) Copyright 2008-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 ****************************************************************************/
14
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <generated/utsrelease.h>
18 #include <linux/utsname.h>
19 #include <linux/init.h>
20 #include <linux/fs.h>
21 #include <linux/namei.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/delay.h>
25 #include <linux/unistd.h>
26 #include <linux/string.h>
27 #include <linux/parser.h>
28 #include <linux/syscalls.h>
29 #include <linux/configfs.h>
30 #include <linux/spinlock.h>
31
32 #include <target/target_core_base.h>
33 #include <target/target_core_backend.h>
34 #include <target/target_core_fabric.h>
35
36 #include "target_core_internal.h"
37 #include "target_core_alua.h"
38 #include "target_core_pr.h"
39 #include "target_core_rd.h"
40 #include "target_core_xcopy.h"
41
42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
44 { \
45 struct config_item_type *cit = &tb->tb_##_name##_cit; \
46 \
47 cit->ct_item_ops = _item_ops; \
48 cit->ct_group_ops = _group_ops; \
49 cit->ct_attrs = _attrs; \
50 cit->ct_owner = tb->ops->owner; \
51 pr_debug("Setup generic %s\n", __stringify(_name)); \
52 }
53
54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
56 { \
57 struct config_item_type *cit = &tb->tb_##_name##_cit; \
58 \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
62 cit->ct_owner = tb->ops->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
64 }
65
66 extern struct t10_alua_lu_gp *default_lu_gp;
67
68 static LIST_HEAD(g_tf_list);
69 static DEFINE_MUTEX(g_tf_lock);
70
71 static struct config_group target_core_hbagroup;
72 static struct config_group alua_group;
73 static struct config_group alua_lu_gps_group;
74
75 static inline struct se_hba *
item_to_hba(struct config_item * item)76 item_to_hba(struct config_item *item)
77 {
78 return container_of(to_config_group(item), struct se_hba, hba_group);
79 }
80
81 /*
82 * Attributes for /sys/kernel/config/target/
83 */
target_core_item_version_show(struct config_item * item,char * page)84 static ssize_t target_core_item_version_show(struct config_item *item,
85 char *page)
86 {
87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
89 utsname()->sysname, utsname()->machine);
90 }
91
92 CONFIGFS_ATTR_RO(target_core_item_, version);
93
94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
95 static char db_root_stage[DB_ROOT_LEN];
96
target_core_item_dbroot_show(struct config_item * item,char * page)97 static ssize_t target_core_item_dbroot_show(struct config_item *item,
98 char *page)
99 {
100 return sprintf(page, "%s\n", db_root);
101 }
102
target_core_item_dbroot_store(struct config_item * item,const char * page,size_t count)103 static ssize_t target_core_item_dbroot_store(struct config_item *item,
104 const char *page, size_t count)
105 {
106 ssize_t read_bytes;
107 struct file *fp;
108
109 mutex_lock(&g_tf_lock);
110 if (!list_empty(&g_tf_list)) {
111 mutex_unlock(&g_tf_lock);
112 pr_err("db_root: cannot be changed: target drivers registered");
113 return -EINVAL;
114 }
115
116 if (count > (DB_ROOT_LEN - 1)) {
117 mutex_unlock(&g_tf_lock);
118 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
119 (int)count, DB_ROOT_LEN - 1);
120 return -EINVAL;
121 }
122
123 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
124 if (!read_bytes) {
125 mutex_unlock(&g_tf_lock);
126 return -EINVAL;
127 }
128 if (db_root_stage[read_bytes - 1] == '\n')
129 db_root_stage[read_bytes - 1] = '\0';
130
131 /* validate new db root before accepting it */
132 fp = filp_open(db_root_stage, O_RDONLY, 0);
133 if (IS_ERR(fp)) {
134 mutex_unlock(&g_tf_lock);
135 pr_err("db_root: cannot open: %s\n", db_root_stage);
136 return -EINVAL;
137 }
138 if (!S_ISDIR(file_inode(fp)->i_mode)) {
139 filp_close(fp, NULL);
140 mutex_unlock(&g_tf_lock);
141 pr_err("db_root: not a directory: %s\n", db_root_stage);
142 return -EINVAL;
143 }
144 filp_close(fp, NULL);
145
146 strncpy(db_root, db_root_stage, read_bytes);
147
148 mutex_unlock(&g_tf_lock);
149
150 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
151
152 return read_bytes;
153 }
154
155 CONFIGFS_ATTR(target_core_item_, dbroot);
156
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);
494 return;
495 }
496 }
497 mutex_unlock(&g_tf_lock);
498 }
499 EXPORT_SYMBOL(target_unregister_template);
500
501 /*##############################################################################
502 // Stop functions called by external Target Fabrics Modules
503 //############################################################################*/
504
to_attrib(struct config_item * item)505 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
506 {
507 return container_of(to_config_group(item), struct se_dev_attrib,
508 da_group);
509 }
510
511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
513 static ssize_t _name##_show(struct config_item *item, char *page) \
514 { \
515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
516 }
517
518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
538 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
549
550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
551 static ssize_t _name##_store(struct config_item *item, const char *page,\
552 size_t count) \
553 { \
554 struct se_dev_attrib *da = to_attrib(item); \
555 u32 val; \
556 int ret; \
557 \
558 ret = kstrtou32(page, 0, &val); \
559 if (ret < 0) \
560 return ret; \
561 da->_name = val; \
562 return count; \
563 }
564
565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
570
571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
572 static ssize_t _name##_store(struct config_item *item, const char *page, \
573 size_t count) \
574 { \
575 struct se_dev_attrib *da = to_attrib(item); \
576 bool flag; \
577 int ret; \
578 \
579 ret = strtobool(page, &flag); \
580 if (ret < 0) \
581 return ret; \
582 da->_name = flag; \
583 return count; \
584 }
585
586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
592
593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
594 static ssize_t _name##_store(struct config_item *item, const char *page,\
595 size_t count) \
596 { \
597 printk_once(KERN_WARNING \
598 "ignoring deprecated %s attribute\n", \
599 __stringify(_name)); \
600 return count; \
601 }
602
603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
605
dev_set_t10_wwn_model_alias(struct se_device * dev)606 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
607 {
608 const char *configname;
609
610 configname = config_item_name(&dev->dev_group.cg_item);
611 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
612 pr_warn("dev[%p]: Backstore name '%s' is too long for "
613 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
614 configname);
615 }
616 /*
617 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
618 * here without potentially breaking existing setups, so continue to
619 * truncate one byte shorter than what can be carried in INQUIRY.
620 */
621 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
622 }
623
emulate_model_alias_store(struct config_item * item,const char * page,size_t count)624 static ssize_t emulate_model_alias_store(struct config_item *item,
625 const char *page, size_t count)
626 {
627 struct se_dev_attrib *da = to_attrib(item);
628 struct se_device *dev = da->da_dev;
629 bool flag;
630 int ret;
631
632 if (dev->export_count) {
633 pr_err("dev[%p]: Unable to change model alias"
634 " while export_count is %d\n",
635 dev, dev->export_count);
636 return -EINVAL;
637 }
638
639 ret = strtobool(page, &flag);
640 if (ret < 0)
641 return ret;
642
643 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
644 if (flag) {
645 dev_set_t10_wwn_model_alias(dev);
646 } else {
647 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
648 sizeof(dev->t10_wwn.model));
649 }
650 da->emulate_model_alias = flag;
651 return count;
652 }
653
emulate_write_cache_store(struct config_item * item,const char * page,size_t count)654 static ssize_t emulate_write_cache_store(struct config_item *item,
655 const char *page, size_t count)
656 {
657 struct se_dev_attrib *da = to_attrib(item);
658 bool flag;
659 int ret;
660
661 ret = strtobool(page, &flag);
662 if (ret < 0)
663 return ret;
664
665 if (flag && da->da_dev->transport->get_write_cache) {
666 pr_err("emulate_write_cache not supported for this device\n");
667 return -EINVAL;
668 }
669
670 da->emulate_write_cache = flag;
671 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
672 da->da_dev, flag);
673 return count;
674 }
675
emulate_ua_intlck_ctrl_store(struct config_item * item,const char * page,size_t count)676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
677 const char *page, size_t count)
678 {
679 struct se_dev_attrib *da = to_attrib(item);
680 u32 val;
681 int ret;
682
683 ret = kstrtou32(page, 0, &val);
684 if (ret < 0)
685 return ret;
686
687 if (val != TARGET_UA_INTLCK_CTRL_CLEAR
688 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
689 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
690 pr_err("Illegal value %d\n", val);
691 return -EINVAL;
692 }
693
694 if (da->da_dev->export_count) {
695 pr_err("dev[%p]: Unable to change SE Device"
696 " UA_INTRLCK_CTRL while export_count is %d\n",
697 da->da_dev, da->da_dev->export_count);
698 return -EINVAL;
699 }
700 da->emulate_ua_intlck_ctrl = val;
701 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
702 da->da_dev, val);
703 return count;
704 }
705
emulate_tas_store(struct config_item * item,const char * page,size_t count)706 static ssize_t emulate_tas_store(struct config_item *item,
707 const char *page, size_t count)
708 {
709 struct se_dev_attrib *da = to_attrib(item);
710 bool flag;
711 int ret;
712
713 ret = strtobool(page, &flag);
714 if (ret < 0)
715 return ret;
716
717 if (da->da_dev->export_count) {
718 pr_err("dev[%p]: Unable to change SE Device TAS while"
719 " export_count is %d\n",
720 da->da_dev, da->da_dev->export_count);
721 return -EINVAL;
722 }
723 da->emulate_tas = flag;
724 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
725 da->da_dev, flag ? "Enabled" : "Disabled");
726
727 return count;
728 }
729
emulate_tpu_store(struct config_item * item,const char * page,size_t count)730 static ssize_t emulate_tpu_store(struct config_item *item,
731 const char *page, size_t count)
732 {
733 struct se_dev_attrib *da = to_attrib(item);
734 bool flag;
735 int ret;
736
737 ret = strtobool(page, &flag);
738 if (ret < 0)
739 return ret;
740
741 /*
742 * We expect this value to be non-zero when generic Block Layer
743 * Discard supported is detected iblock_create_virtdevice().
744 */
745 if (flag && !da->max_unmap_block_desc_count) {
746 pr_err("Generic Block Discard not supported\n");
747 return -ENOSYS;
748 }
749
750 da->emulate_tpu = flag;
751 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
752 da->da_dev, flag);
753 return count;
754 }
755
emulate_tpws_store(struct config_item * item,const char * page,size_t count)756 static ssize_t emulate_tpws_store(struct config_item *item,
757 const char *page, size_t count)
758 {
759 struct se_dev_attrib *da = to_attrib(item);
760 bool flag;
761 int ret;
762
763 ret = strtobool(page, &flag);
764 if (ret < 0)
765 return ret;
766
767 /*
768 * We expect this value to be non-zero when generic Block Layer
769 * Discard supported is detected iblock_create_virtdevice().
770 */
771 if (flag && !da->max_unmap_block_desc_count) {
772 pr_err("Generic Block Discard not supported\n");
773 return -ENOSYS;
774 }
775
776 da->emulate_tpws = flag;
777 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
778 da->da_dev, flag);
779 return count;
780 }
781
pi_prot_type_store(struct config_item * item,const char * page,size_t count)782 static ssize_t pi_prot_type_store(struct config_item *item,
783 const char *page, size_t count)
784 {
785 struct se_dev_attrib *da = to_attrib(item);
786 int old_prot = da->pi_prot_type, ret;
787 struct se_device *dev = da->da_dev;
788 u32 flag;
789
790 ret = kstrtou32(page, 0, &flag);
791 if (ret < 0)
792 return ret;
793
794 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
795 pr_err("Illegal value %d for pi_prot_type\n", flag);
796 return -EINVAL;
797 }
798 if (flag == 2) {
799 pr_err("DIF TYPE2 protection currently not supported\n");
800 return -ENOSYS;
801 }
802 if (da->hw_pi_prot_type) {
803 pr_warn("DIF protection enabled on underlying hardware,"
804 " ignoring\n");
805 return count;
806 }
807 if (!dev->transport->init_prot || !dev->transport->free_prot) {
808 /* 0 is only allowed value for non-supporting backends */
809 if (flag == 0)
810 return count;
811
812 pr_err("DIF protection not supported by backend: %s\n",
813 dev->transport->name);
814 return -ENOSYS;
815 }
816 if (!target_dev_configured(dev)) {
817 pr_err("DIF protection requires device to be configured\n");
818 return -ENODEV;
819 }
820 if (dev->export_count) {
821 pr_err("dev[%p]: Unable to change SE Device PROT type while"
822 " export_count is %d\n", dev, dev->export_count);
823 return -EINVAL;
824 }
825
826 da->pi_prot_type = flag;
827
828 if (flag && !old_prot) {
829 ret = dev->transport->init_prot(dev);
830 if (ret) {
831 da->pi_prot_type = old_prot;
832 da->pi_prot_verify = (bool) da->pi_prot_type;
833 return ret;
834 }
835
836 } else if (!flag && old_prot) {
837 dev->transport->free_prot(dev);
838 }
839
840 da->pi_prot_verify = (bool) da->pi_prot_type;
841 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
842 return count;
843 }
844
845 /* always zero, but attr needs to remain RW to avoid userspace breakage */
pi_prot_format_show(struct config_item * item,char * page)846 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
847 {
848 return snprintf(page, PAGE_SIZE, "0\n");
849 }
850
pi_prot_format_store(struct config_item * item,const char * page,size_t count)851 static ssize_t pi_prot_format_store(struct config_item *item,
852 const char *page, size_t count)
853 {
854 struct se_dev_attrib *da = to_attrib(item);
855 struct se_device *dev = da->da_dev;
856 bool flag;
857 int ret;
858
859 ret = strtobool(page, &flag);
860 if (ret < 0)
861 return ret;
862
863 if (!flag)
864 return count;
865
866 if (!dev->transport->format_prot) {
867 pr_err("DIF protection format not supported by backend %s\n",
868 dev->transport->name);
869 return -ENOSYS;
870 }
871 if (!target_dev_configured(dev)) {
872 pr_err("DIF protection format requires device to be configured\n");
873 return -ENODEV;
874 }
875 if (dev->export_count) {
876 pr_err("dev[%p]: Unable to format SE Device PROT type while"
877 " export_count is %d\n", dev, dev->export_count);
878 return -EINVAL;
879 }
880
881 ret = dev->transport->format_prot(dev);
882 if (ret)
883 return ret;
884
885 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
886 return count;
887 }
888
pi_prot_verify_store(struct config_item * item,const char * page,size_t count)889 static ssize_t pi_prot_verify_store(struct config_item *item,
890 const char *page, size_t count)
891 {
892 struct se_dev_attrib *da = to_attrib(item);
893 bool flag;
894 int ret;
895
896 ret = strtobool(page, &flag);
897 if (ret < 0)
898 return ret;
899
900 if (!flag) {
901 da->pi_prot_verify = flag;
902 return count;
903 }
904 if (da->hw_pi_prot_type) {
905 pr_warn("DIF protection enabled on underlying hardware,"
906 " ignoring\n");
907 return count;
908 }
909 if (!da->pi_prot_type) {
910 pr_warn("DIF protection not supported by backend, ignoring\n");
911 return count;
912 }
913 da->pi_prot_verify = flag;
914
915 return count;
916 }
917
force_pr_aptpl_store(struct config_item * item,const char * page,size_t count)918 static ssize_t force_pr_aptpl_store(struct config_item *item,
919 const char *page, size_t count)
920 {
921 struct se_dev_attrib *da = to_attrib(item);
922 bool flag;
923 int ret;
924
925 ret = strtobool(page, &flag);
926 if (ret < 0)
927 return ret;
928 if (da->da_dev->export_count) {
929 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
930 " export_count is %d\n",
931 da->da_dev, da->da_dev->export_count);
932 return -EINVAL;
933 }
934
935 da->force_pr_aptpl = flag;
936 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
937 return count;
938 }
939
emulate_rest_reord_store(struct config_item * item,const char * page,size_t count)940 static ssize_t emulate_rest_reord_store(struct config_item *item,
941 const char *page, size_t count)
942 {
943 struct se_dev_attrib *da = to_attrib(item);
944 bool flag;
945 int ret;
946
947 ret = strtobool(page, &flag);
948 if (ret < 0)
949 return ret;
950
951 if (flag != 0) {
952 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
953 " reordering not implemented\n", da->da_dev);
954 return -ENOSYS;
955 }
956 da->emulate_rest_reord = flag;
957 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
958 da->da_dev, flag);
959 return count;
960 }
961
unmap_zeroes_data_store(struct config_item * item,const char * page,size_t count)962 static ssize_t unmap_zeroes_data_store(struct config_item *item,
963 const char *page, size_t count)
964 {
965 struct se_dev_attrib *da = to_attrib(item);
966 bool flag;
967 int ret;
968
969 ret = strtobool(page, &flag);
970 if (ret < 0)
971 return ret;
972
973 if (da->da_dev->export_count) {
974 pr_err("dev[%p]: Unable to change SE Device"
975 " unmap_zeroes_data while export_count is %d\n",
976 da->da_dev, da->da_dev->export_count);
977 return -EINVAL;
978 }
979 /*
980 * We expect this value to be non-zero when generic Block Layer
981 * Discard supported is detected iblock_configure_device().
982 */
983 if (flag && !da->max_unmap_block_desc_count) {
984 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
985 " because max_unmap_block_desc_count is zero\n",
986 da->da_dev);
987 return -ENOSYS;
988 }
989 da->unmap_zeroes_data = flag;
990 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
991 da->da_dev, flag);
992 return count;
993 }
994
995 /*
996 * Note, this can only be called on unexported SE Device Object.
997 */
queue_depth_store(struct config_item * item,const char * page,size_t count)998 static ssize_t queue_depth_store(struct config_item *item,
999 const char *page, size_t count)
1000 {
1001 struct se_dev_attrib *da = to_attrib(item);
1002 struct se_device *dev = da->da_dev;
1003 u32 val;
1004 int ret;
1005
1006 ret = kstrtou32(page, 0, &val);
1007 if (ret < 0)
1008 return ret;
1009
1010 if (dev->export_count) {
1011 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012 " export_count is %d\n",
1013 dev, dev->export_count);
1014 return -EINVAL;
1015 }
1016 if (!val) {
1017 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1018 return -EINVAL;
1019 }
1020
1021 if (val > dev->dev_attrib.queue_depth) {
1022 if (val > dev->dev_attrib.hw_queue_depth) {
1023 pr_err("dev[%p]: Passed queue_depth:"
1024 " %u exceeds TCM/SE_Device MAX"
1025 " TCQ: %u\n", dev, val,
1026 dev->dev_attrib.hw_queue_depth);
1027 return -EINVAL;
1028 }
1029 }
1030 da->queue_depth = dev->queue_depth = val;
1031 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1032 return count;
1033 }
1034
optimal_sectors_store(struct config_item * item,const char * page,size_t count)1035 static ssize_t optimal_sectors_store(struct config_item *item,
1036 const char *page, size_t count)
1037 {
1038 struct se_dev_attrib *da = to_attrib(item);
1039 u32 val;
1040 int ret;
1041
1042 ret = kstrtou32(page, 0, &val);
1043 if (ret < 0)
1044 return ret;
1045
1046 if (da->da_dev->export_count) {
1047 pr_err("dev[%p]: Unable to change SE Device"
1048 " optimal_sectors while export_count is %d\n",
1049 da->da_dev, da->da_dev->export_count);
1050 return -EINVAL;
1051 }
1052 if (val > da->hw_max_sectors) {
1053 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054 " greater than hw_max_sectors: %u\n",
1055 da->da_dev, val, da->hw_max_sectors);
1056 return -EINVAL;
1057 }
1058
1059 da->optimal_sectors = val;
1060 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1061 da->da_dev, val);
1062 return count;
1063 }
1064
block_size_store(struct config_item * item,const char * page,size_t count)1065 static ssize_t block_size_store(struct config_item *item,
1066 const char *page, size_t count)
1067 {
1068 struct se_dev_attrib *da = to_attrib(item);
1069 u32 val;
1070 int ret;
1071
1072 ret = kstrtou32(page, 0, &val);
1073 if (ret < 0)
1074 return ret;
1075
1076 if (da->da_dev->export_count) {
1077 pr_err("dev[%p]: Unable to change SE Device block_size"
1078 " while export_count is %d\n",
1079 da->da_dev, da->da_dev->export_count);
1080 return -EINVAL;
1081 }
1082
1083 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1084 pr_err("dev[%p]: Illegal value for block_device: %u"
1085 " for SE device, must be 512, 1024, 2048 or 4096\n",
1086 da->da_dev, val);
1087 return -EINVAL;
1088 }
1089
1090 da->block_size = val;
1091 if (da->max_bytes_per_io)
1092 da->hw_max_sectors = da->max_bytes_per_io / val;
1093
1094 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1095 da->da_dev, val);
1096 return count;
1097 }
1098
alua_support_show(struct config_item * item,char * page)1099 static ssize_t alua_support_show(struct config_item *item, char *page)
1100 {
1101 struct se_dev_attrib *da = to_attrib(item);
1102 u8 flags = da->da_dev->transport_flags;
1103
1104 return snprintf(page, PAGE_SIZE, "%d\n",
1105 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1106 }
1107
alua_support_store(struct config_item * item,const char * page,size_t count)1108 static ssize_t alua_support_store(struct config_item *item,
1109 const char *page, size_t count)
1110 {
1111 struct se_dev_attrib *da = to_attrib(item);
1112 struct se_device *dev = da->da_dev;
1113 bool flag, oldflag;
1114 int ret;
1115
1116 ret = strtobool(page, &flag);
1117 if (ret < 0)
1118 return ret;
1119
1120 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1121 if (flag == oldflag)
1122 return count;
1123
1124 if (!(dev->transport->transport_flags_changeable &
1125 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1126 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1127 " alua_support has fixed value\n", dev);
1128 return -ENOSYS;
1129 }
1130
1131 if (flag)
1132 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1133 else
1134 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1135 return count;
1136 }
1137
pgr_support_show(struct config_item * item,char * page)1138 static ssize_t pgr_support_show(struct config_item *item, char *page)
1139 {
1140 struct se_dev_attrib *da = to_attrib(item);
1141 u8 flags = da->da_dev->transport_flags;
1142
1143 return snprintf(page, PAGE_SIZE, "%d\n",
1144 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1145 }
1146
pgr_support_store(struct config_item * item,const char * page,size_t count)1147 static ssize_t pgr_support_store(struct config_item *item,
1148 const char *page, size_t count)
1149 {
1150 struct se_dev_attrib *da = to_attrib(item);
1151 struct se_device *dev = da->da_dev;
1152 bool flag, oldflag;
1153 int ret;
1154
1155 ret = strtobool(page, &flag);
1156 if (ret < 0)
1157 return ret;
1158
1159 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1160 if (flag == oldflag)
1161 return count;
1162
1163 if (!(dev->transport->transport_flags_changeable &
1164 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1165 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1166 " pgr_support has fixed value\n", dev);
1167 return -ENOSYS;
1168 }
1169
1170 if (flag)
1171 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1172 else
1173 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1174 return count;
1175 }
1176
1177 CONFIGFS_ATTR(, emulate_model_alias);
1178 CONFIGFS_ATTR(, emulate_dpo);
1179 CONFIGFS_ATTR(, emulate_fua_write);
1180 CONFIGFS_ATTR(, emulate_fua_read);
1181 CONFIGFS_ATTR(, emulate_write_cache);
1182 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1183 CONFIGFS_ATTR(, emulate_tas);
1184 CONFIGFS_ATTR(, emulate_tpu);
1185 CONFIGFS_ATTR(, emulate_tpws);
1186 CONFIGFS_ATTR(, emulate_caw);
1187 CONFIGFS_ATTR(, emulate_3pc);
1188 CONFIGFS_ATTR(, emulate_pr);
1189 CONFIGFS_ATTR(, pi_prot_type);
1190 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1191 CONFIGFS_ATTR(, pi_prot_format);
1192 CONFIGFS_ATTR(, pi_prot_verify);
1193 CONFIGFS_ATTR(, enforce_pr_isids);
1194 CONFIGFS_ATTR(, is_nonrot);
1195 CONFIGFS_ATTR(, emulate_rest_reord);
1196 CONFIGFS_ATTR(, force_pr_aptpl);
1197 CONFIGFS_ATTR_RO(, hw_block_size);
1198 CONFIGFS_ATTR(, block_size);
1199 CONFIGFS_ATTR_RO(, hw_max_sectors);
1200 CONFIGFS_ATTR(, optimal_sectors);
1201 CONFIGFS_ATTR_RO(, hw_queue_depth);
1202 CONFIGFS_ATTR(, queue_depth);
1203 CONFIGFS_ATTR(, max_unmap_lba_count);
1204 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1205 CONFIGFS_ATTR(, unmap_granularity);
1206 CONFIGFS_ATTR(, unmap_granularity_alignment);
1207 CONFIGFS_ATTR(, unmap_zeroes_data);
1208 CONFIGFS_ATTR(, max_write_same_len);
1209 CONFIGFS_ATTR(, alua_support);
1210 CONFIGFS_ATTR(, pgr_support);
1211
1212 /*
1213 * dev_attrib attributes for devices using the target core SBC/SPC
1214 * interpreter. Any backend using spc_parse_cdb should be using
1215 * these.
1216 */
1217 struct configfs_attribute *sbc_attrib_attrs[] = {
1218 &attr_emulate_model_alias,
1219 &attr_emulate_dpo,
1220 &attr_emulate_fua_write,
1221 &attr_emulate_fua_read,
1222 &attr_emulate_write_cache,
1223 &attr_emulate_ua_intlck_ctrl,
1224 &attr_emulate_tas,
1225 &attr_emulate_tpu,
1226 &attr_emulate_tpws,
1227 &attr_emulate_caw,
1228 &attr_emulate_3pc,
1229 &attr_emulate_pr,
1230 &attr_pi_prot_type,
1231 &attr_hw_pi_prot_type,
1232 &attr_pi_prot_format,
1233 &attr_pi_prot_verify,
1234 &attr_enforce_pr_isids,
1235 &attr_is_nonrot,
1236 &attr_emulate_rest_reord,
1237 &attr_force_pr_aptpl,
1238 &attr_hw_block_size,
1239 &attr_block_size,
1240 &attr_hw_max_sectors,
1241 &attr_optimal_sectors,
1242 &attr_hw_queue_depth,
1243 &attr_queue_depth,
1244 &attr_max_unmap_lba_count,
1245 &attr_max_unmap_block_desc_count,
1246 &attr_unmap_granularity,
1247 &attr_unmap_granularity_alignment,
1248 &attr_unmap_zeroes_data,
1249 &attr_max_write_same_len,
1250 &attr_alua_support,
1251 &attr_pgr_support,
1252 NULL,
1253 };
1254 EXPORT_SYMBOL(sbc_attrib_attrs);
1255
1256 /*
1257 * Minimal dev_attrib attributes for devices passing through CDBs.
1258 * In this case we only provide a few read-only attributes for
1259 * backwards compatibility.
1260 */
1261 struct configfs_attribute *passthrough_attrib_attrs[] = {
1262 &attr_hw_pi_prot_type,
1263 &attr_hw_block_size,
1264 &attr_hw_max_sectors,
1265 &attr_hw_queue_depth,
1266 &attr_emulate_pr,
1267 &attr_alua_support,
1268 &attr_pgr_support,
1269 NULL,
1270 };
1271 EXPORT_SYMBOL(passthrough_attrib_attrs);
1272
1273 /*
1274 * pr related dev_attrib attributes for devices passing through CDBs,
1275 * but allowing in core pr emulation.
1276 */
1277 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1278 &attr_enforce_pr_isids,
1279 &attr_force_pr_aptpl,
1280 NULL,
1281 };
1282 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1283
1284 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1285 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1286
1287 /* End functions for struct config_item_type tb_dev_attrib_cit */
1288
1289 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1290
to_t10_wwn(struct config_item * item)1291 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1292 {
1293 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1294 }
1295
target_check_inquiry_data(char * buf)1296 static ssize_t target_check_inquiry_data(char *buf)
1297 {
1298 size_t len;
1299 int i;
1300
1301 len = strlen(buf);
1302
1303 /*
1304 * SPC 4.3.1:
1305 * ASCII data fields shall contain only ASCII printable characters
1306 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1307 * more ASCII null (00h) characters.
1308 */
1309 for (i = 0; i < len; i++) {
1310 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1311 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1312 return -EINVAL;
1313 }
1314 }
1315
1316 return len;
1317 }
1318
1319 /*
1320 * STANDARD and VPD page 0x83 T10 Vendor Identification
1321 */
target_wwn_vendor_id_show(struct config_item * item,char * page)1322 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1323 char *page)
1324 {
1325 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1326 }
1327
target_wwn_vendor_id_store(struct config_item * item,const char * page,size_t count)1328 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1329 const char *page, size_t count)
1330 {
1331 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1332 struct se_device *dev = t10_wwn->t10_dev;
1333 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1334 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1335 char *stripped = NULL;
1336 size_t len;
1337 ssize_t ret;
1338
1339 len = strlcpy(buf, page, sizeof(buf));
1340 if (len < sizeof(buf)) {
1341 /* Strip any newline added from userspace. */
1342 stripped = strstrip(buf);
1343 len = strlen(stripped);
1344 }
1345 if (len > INQUIRY_VENDOR_LEN) {
1346 pr_err("Emulated T10 Vendor Identification exceeds"
1347 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1348 "\n");
1349 return -EOVERFLOW;
1350 }
1351
1352 ret = target_check_inquiry_data(stripped);
1353
1354 if (ret < 0)
1355 return ret;
1356
1357 /*
1358 * Check to see if any active exports exist. If they do exist, fail
1359 * here as changing this information on the fly (underneath the
1360 * initiator side OS dependent multipath code) could cause negative
1361 * effects.
1362 */
1363 if (dev->export_count) {
1364 pr_err("Unable to set T10 Vendor Identification while"
1365 " active %d exports exist\n", dev->export_count);
1366 return -EINVAL;
1367 }
1368
1369 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1370 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1371
1372 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1373 " %s\n", dev->t10_wwn.vendor);
1374
1375 return count;
1376 }
1377
target_wwn_product_id_show(struct config_item * item,char * page)1378 static ssize_t target_wwn_product_id_show(struct config_item *item,
1379 char *page)
1380 {
1381 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1382 }
1383
target_wwn_product_id_store(struct config_item * item,const char * page,size_t count)1384 static ssize_t target_wwn_product_id_store(struct config_item *item,
1385 const char *page, size_t count)
1386 {
1387 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1388 struct se_device *dev = t10_wwn->t10_dev;
1389 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1390 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1391 char *stripped = NULL;
1392 size_t len;
1393 ssize_t ret;
1394
1395 len = strlcpy(buf, page, sizeof(buf));
1396 if (len < sizeof(buf)) {
1397 /* Strip any newline added from userspace. */
1398 stripped = strstrip(buf);
1399 len = strlen(stripped);
1400 }
1401 if (len > INQUIRY_MODEL_LEN) {
1402 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1403 __stringify(INQUIRY_MODEL_LEN)
1404 "\n");
1405 return -EOVERFLOW;
1406 }
1407
1408 ret = target_check_inquiry_data(stripped);
1409
1410 if (ret < 0)
1411 return ret;
1412
1413 /*
1414 * Check to see if any active exports exist. If they do exist, fail
1415 * here as changing this information on the fly (underneath the
1416 * initiator side OS dependent multipath code) could cause negative
1417 * effects.
1418 */
1419 if (dev->export_count) {
1420 pr_err("Unable to set T10 Model while active %d exports exist\n",
1421 dev->export_count);
1422 return -EINVAL;
1423 }
1424
1425 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1426 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1427
1428 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1429 dev->t10_wwn.model);
1430
1431 return count;
1432 }
1433
target_wwn_revision_show(struct config_item * item,char * page)1434 static ssize_t target_wwn_revision_show(struct config_item *item,
1435 char *page)
1436 {
1437 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1438 }
1439
target_wwn_revision_store(struct config_item * item,const char * page,size_t count)1440 static ssize_t target_wwn_revision_store(struct config_item *item,
1441 const char *page, size_t count)
1442 {
1443 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1444 struct se_device *dev = t10_wwn->t10_dev;
1445 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1446 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1447 char *stripped = NULL;
1448 size_t len;
1449 ssize_t ret;
1450
1451 len = strlcpy(buf, page, sizeof(buf));
1452 if (len < sizeof(buf)) {
1453 /* Strip any newline added from userspace. */
1454 stripped = strstrip(buf);
1455 len = strlen(stripped);
1456 }
1457 if (len > INQUIRY_REVISION_LEN) {
1458 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1459 __stringify(INQUIRY_REVISION_LEN)
1460 "\n");
1461 return -EOVERFLOW;
1462 }
1463
1464 ret = target_check_inquiry_data(stripped);
1465
1466 if (ret < 0)
1467 return ret;
1468
1469 /*
1470 * Check to see if any active exports exist. If they do exist, fail
1471 * here as changing this information on the fly (underneath the
1472 * initiator side OS dependent multipath code) could cause negative
1473 * effects.
1474 */
1475 if (dev->export_count) {
1476 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1477 dev->export_count);
1478 return -EINVAL;
1479 }
1480
1481 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1482 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1483
1484 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1485 dev->t10_wwn.revision);
1486
1487 return count;
1488 }
1489
1490 /*
1491 * VPD page 0x80 Unit serial
1492 */
target_wwn_vpd_unit_serial_show(struct config_item * item,char * page)1493 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1494 char *page)
1495 {
1496 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1497 &to_t10_wwn(item)->unit_serial[0]);
1498 }
1499
target_wwn_vpd_unit_serial_store(struct config_item * item,const char * page,size_t count)1500 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1501 const char *page, size_t count)
1502 {
1503 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1504 struct se_device *dev = t10_wwn->t10_dev;
1505 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1506
1507 /*
1508 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1509 * from the struct scsi_device level firmware, do not allow
1510 * VPD Unit Serial to be emulated.
1511 *
1512 * Note this struct scsi_device could also be emulating VPD
1513 * information from its drivers/scsi LLD. But for now we assume
1514 * it is doing 'the right thing' wrt a world wide unique
1515 * VPD Unit Serial Number that OS dependent multipath can depend on.
1516 */
1517 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1518 pr_err("Underlying SCSI device firmware provided VPD"
1519 " Unit Serial, ignoring request\n");
1520 return -EOPNOTSUPP;
1521 }
1522
1523 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1524 pr_err("Emulated VPD Unit Serial exceeds"
1525 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1526 return -EOVERFLOW;
1527 }
1528 /*
1529 * Check to see if any active $FABRIC_MOD exports exist. If they
1530 * do exist, fail here as changing this information on the fly
1531 * (underneath the initiator side OS dependent multipath code)
1532 * could cause negative effects.
1533 */
1534 if (dev->export_count) {
1535 pr_err("Unable to set VPD Unit Serial while"
1536 " active %d $FABRIC_MOD exports exist\n",
1537 dev->export_count);
1538 return -EINVAL;
1539 }
1540
1541 /*
1542 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1543 *
1544 * Also, strip any newline added from the userspace
1545 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1546 */
1547 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1548 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1549 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1550 "%s", strstrip(buf));
1551 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1552
1553 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1554 " %s\n", dev->t10_wwn.unit_serial);
1555
1556 return count;
1557 }
1558
1559 /*
1560 * VPD page 0x83 Protocol Identifier
1561 */
target_wwn_vpd_protocol_identifier_show(struct config_item * item,char * page)1562 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1563 char *page)
1564 {
1565 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1566 struct t10_vpd *vpd;
1567 unsigned char buf[VPD_TMP_BUF_SIZE];
1568 ssize_t len = 0;
1569
1570 memset(buf, 0, VPD_TMP_BUF_SIZE);
1571
1572 spin_lock(&t10_wwn->t10_vpd_lock);
1573 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1574 if (!vpd->protocol_identifier_set)
1575 continue;
1576
1577 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1578
1579 if (len + strlen(buf) >= PAGE_SIZE)
1580 break;
1581
1582 len += sprintf(page+len, "%s", buf);
1583 }
1584 spin_unlock(&t10_wwn->t10_vpd_lock);
1585
1586 return len;
1587 }
1588
1589 /*
1590 * Generic wrapper for dumping VPD identifiers by association.
1591 */
1592 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1593 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1594 char *page) \
1595 { \
1596 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1597 struct t10_vpd *vpd; \
1598 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1599 ssize_t len = 0; \
1600 \
1601 spin_lock(&t10_wwn->t10_vpd_lock); \
1602 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1603 if (vpd->association != _assoc) \
1604 continue; \
1605 \
1606 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1607 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1608 if (len + strlen(buf) >= PAGE_SIZE) \
1609 break; \
1610 len += sprintf(page+len, "%s", buf); \
1611 \
1612 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1613 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1614 if (len + strlen(buf) >= PAGE_SIZE) \
1615 break; \
1616 len += sprintf(page+len, "%s", buf); \
1617 \
1618 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1619 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1620 if (len + strlen(buf) >= PAGE_SIZE) \
1621 break; \
1622 len += sprintf(page+len, "%s", buf); \
1623 } \
1624 spin_unlock(&t10_wwn->t10_vpd_lock); \
1625 \
1626 return len; \
1627 }
1628
1629 /* VPD page 0x83 Association: Logical Unit */
1630 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1631 /* VPD page 0x83 Association: Target Port */
1632 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1633 /* VPD page 0x83 Association: SCSI Target Device */
1634 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1635
1636 CONFIGFS_ATTR(target_wwn_, vendor_id);
1637 CONFIGFS_ATTR(target_wwn_, product_id);
1638 CONFIGFS_ATTR(target_wwn_, revision);
1639 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1640 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1641 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1642 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1643 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1644
1645 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1646 &target_wwn_attr_vendor_id,
1647 &target_wwn_attr_product_id,
1648 &target_wwn_attr_revision,
1649 &target_wwn_attr_vpd_unit_serial,
1650 &target_wwn_attr_vpd_protocol_identifier,
1651 &target_wwn_attr_vpd_assoc_logical_unit,
1652 &target_wwn_attr_vpd_assoc_target_port,
1653 &target_wwn_attr_vpd_assoc_scsi_target_device,
1654 NULL,
1655 };
1656
1657 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1658
1659 /* End functions for struct config_item_type tb_dev_wwn_cit */
1660
1661 /* Start functions for struct config_item_type tb_dev_pr_cit */
1662
pr_to_dev(struct config_item * item)1663 static struct se_device *pr_to_dev(struct config_item *item)
1664 {
1665 return container_of(to_config_group(item), struct se_device,
1666 dev_pr_group);
1667 }
1668
target_core_dev_pr_show_spc3_res(struct se_device * dev,char * page)1669 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1670 char *page)
1671 {
1672 struct se_node_acl *se_nacl;
1673 struct t10_pr_registration *pr_reg;
1674 char i_buf[PR_REG_ISID_ID_LEN];
1675
1676 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1677
1678 pr_reg = dev->dev_pr_res_holder;
1679 if (!pr_reg)
1680 return sprintf(page, "No SPC-3 Reservation holder\n");
1681
1682 se_nacl = pr_reg->pr_reg_nacl;
1683 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1684
1685 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1686 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1687 se_nacl->initiatorname, i_buf);
1688 }
1689
target_core_dev_pr_show_spc2_res(struct se_device * dev,char * page)1690 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1691 char *page)
1692 {
1693 struct se_session *sess = dev->reservation_holder;
1694 struct se_node_acl *se_nacl;
1695 ssize_t len;
1696
1697 if (sess) {
1698 se_nacl = sess->se_node_acl;
1699 len = sprintf(page,
1700 "SPC-2 Reservation: %s Initiator: %s\n",
1701 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1702 se_nacl->initiatorname);
1703 } else {
1704 len = sprintf(page, "No SPC-2 Reservation holder\n");
1705 }
1706 return len;
1707 }
1708
target_pr_res_holder_show(struct config_item * item,char * page)1709 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1710 {
1711 struct se_device *dev = pr_to_dev(item);
1712 int ret;
1713
1714 if (!dev->dev_attrib.emulate_pr)
1715 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1716
1717 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1718 return sprintf(page, "Passthrough\n");
1719
1720 spin_lock(&dev->dev_reservation_lock);
1721 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1722 ret = target_core_dev_pr_show_spc2_res(dev, page);
1723 else
1724 ret = target_core_dev_pr_show_spc3_res(dev, page);
1725 spin_unlock(&dev->dev_reservation_lock);
1726 return ret;
1727 }
1728
target_pr_res_pr_all_tgt_pts_show(struct config_item * item,char * page)1729 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1730 char *page)
1731 {
1732 struct se_device *dev = pr_to_dev(item);
1733 ssize_t len = 0;
1734
1735 spin_lock(&dev->dev_reservation_lock);
1736 if (!dev->dev_pr_res_holder) {
1737 len = sprintf(page, "No SPC-3 Reservation holder\n");
1738 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1739 len = sprintf(page, "SPC-3 Reservation: All Target"
1740 " Ports registration\n");
1741 } else {
1742 len = sprintf(page, "SPC-3 Reservation: Single"
1743 " Target Port registration\n");
1744 }
1745
1746 spin_unlock(&dev->dev_reservation_lock);
1747 return len;
1748 }
1749
target_pr_res_pr_generation_show(struct config_item * item,char * page)1750 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1751 char *page)
1752 {
1753 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1754 }
1755
1756
target_pr_res_pr_holder_tg_port_show(struct config_item * item,char * page)1757 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1758 char *page)
1759 {
1760 struct se_device *dev = pr_to_dev(item);
1761 struct se_node_acl *se_nacl;
1762 struct se_portal_group *se_tpg;
1763 struct t10_pr_registration *pr_reg;
1764 const struct target_core_fabric_ops *tfo;
1765 ssize_t len = 0;
1766
1767 spin_lock(&dev->dev_reservation_lock);
1768 pr_reg = dev->dev_pr_res_holder;
1769 if (!pr_reg) {
1770 len = sprintf(page, "No SPC-3 Reservation holder\n");
1771 goto out_unlock;
1772 }
1773
1774 se_nacl = pr_reg->pr_reg_nacl;
1775 se_tpg = se_nacl->se_tpg;
1776 tfo = se_tpg->se_tpg_tfo;
1777
1778 len += sprintf(page+len, "SPC-3 Reservation: %s"
1779 " Target Node Endpoint: %s\n", tfo->fabric_name,
1780 tfo->tpg_get_wwn(se_tpg));
1781 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1782 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1783 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1784 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1785 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1786
1787 out_unlock:
1788 spin_unlock(&dev->dev_reservation_lock);
1789 return len;
1790 }
1791
1792
target_pr_res_pr_registered_i_pts_show(struct config_item * item,char * page)1793 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1794 char *page)
1795 {
1796 struct se_device *dev = pr_to_dev(item);
1797 const struct target_core_fabric_ops *tfo;
1798 struct t10_pr_registration *pr_reg;
1799 unsigned char buf[384];
1800 char i_buf[PR_REG_ISID_ID_LEN];
1801 ssize_t len = 0;
1802 int reg_count = 0;
1803
1804 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1805
1806 spin_lock(&dev->t10_pr.registration_lock);
1807 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1808 pr_reg_list) {
1809
1810 memset(buf, 0, 384);
1811 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1812 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1813 core_pr_dump_initiator_port(pr_reg, i_buf,
1814 PR_REG_ISID_ID_LEN);
1815 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1816 tfo->fabric_name,
1817 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1818 pr_reg->pr_res_generation);
1819
1820 if (len + strlen(buf) >= PAGE_SIZE)
1821 break;
1822
1823 len += sprintf(page+len, "%s", buf);
1824 reg_count++;
1825 }
1826 spin_unlock(&dev->t10_pr.registration_lock);
1827
1828 if (!reg_count)
1829 len += sprintf(page+len, "None\n");
1830
1831 return len;
1832 }
1833
target_pr_res_pr_type_show(struct config_item * item,char * page)1834 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1835 {
1836 struct se_device *dev = pr_to_dev(item);
1837 struct t10_pr_registration *pr_reg;
1838 ssize_t len = 0;
1839
1840 spin_lock(&dev->dev_reservation_lock);
1841 pr_reg = dev->dev_pr_res_holder;
1842 if (pr_reg) {
1843 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1844 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1845 } else {
1846 len = sprintf(page, "No SPC-3 Reservation holder\n");
1847 }
1848
1849 spin_unlock(&dev->dev_reservation_lock);
1850 return len;
1851 }
1852
target_pr_res_type_show(struct config_item * item,char * page)1853 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1854 {
1855 struct se_device *dev = pr_to_dev(item);
1856
1857 if (!dev->dev_attrib.emulate_pr)
1858 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1859 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1860 return sprintf(page, "SPC_PASSTHROUGH\n");
1861 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1862 return sprintf(page, "SPC2_RESERVATIONS\n");
1863
1864 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1865 }
1866
target_pr_res_aptpl_active_show(struct config_item * item,char * page)1867 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1868 char *page)
1869 {
1870 struct se_device *dev = pr_to_dev(item);
1871
1872 if (!dev->dev_attrib.emulate_pr ||
1873 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1874 return 0;
1875
1876 return sprintf(page, "APTPL Bit Status: %s\n",
1877 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1878 }
1879
target_pr_res_aptpl_metadata_show(struct config_item * item,char * page)1880 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1881 char *page)
1882 {
1883 struct se_device *dev = pr_to_dev(item);
1884
1885 if (!dev->dev_attrib.emulate_pr ||
1886 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1887 return 0;
1888
1889 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1890 }
1891
1892 enum {
1893 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1894 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1895 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1896 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1897 };
1898
1899 static match_table_t tokens = {
1900 {Opt_initiator_fabric, "initiator_fabric=%s"},
1901 {Opt_initiator_node, "initiator_node=%s"},
1902 {Opt_initiator_sid, "initiator_sid=%s"},
1903 {Opt_sa_res_key, "sa_res_key=%s"},
1904 {Opt_res_holder, "res_holder=%d"},
1905 {Opt_res_type, "res_type=%d"},
1906 {Opt_res_scope, "res_scope=%d"},
1907 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1908 {Opt_mapped_lun, "mapped_lun=%u"},
1909 {Opt_target_fabric, "target_fabric=%s"},
1910 {Opt_target_node, "target_node=%s"},
1911 {Opt_tpgt, "tpgt=%d"},
1912 {Opt_port_rtpi, "port_rtpi=%d"},
1913 {Opt_target_lun, "target_lun=%u"},
1914 {Opt_err, NULL}
1915 };
1916
target_pr_res_aptpl_metadata_store(struct config_item * item,const char * page,size_t count)1917 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1918 const char *page, size_t count)
1919 {
1920 struct se_device *dev = pr_to_dev(item);
1921 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1922 unsigned char *t_fabric = NULL, *t_port = NULL;
1923 char *orig, *ptr, *opts;
1924 substring_t args[MAX_OPT_ARGS];
1925 unsigned long long tmp_ll;
1926 u64 sa_res_key = 0;
1927 u64 mapped_lun = 0, target_lun = 0;
1928 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1929 u16 tpgt = 0;
1930 u8 type = 0;
1931
1932 if (!dev->dev_attrib.emulate_pr ||
1933 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1934 return count;
1935 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1936 return count;
1937
1938 if (dev->export_count) {
1939 pr_debug("Unable to process APTPL metadata while"
1940 " active fabric exports exist\n");
1941 return -EINVAL;
1942 }
1943
1944 opts = kstrdup(page, GFP_KERNEL);
1945 if (!opts)
1946 return -ENOMEM;
1947
1948 orig = opts;
1949 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1950 if (!*ptr)
1951 continue;
1952
1953 token = match_token(ptr, tokens, args);
1954 switch (token) {
1955 case Opt_initiator_fabric:
1956 i_fabric = match_strdup(args);
1957 if (!i_fabric) {
1958 ret = -ENOMEM;
1959 goto out;
1960 }
1961 break;
1962 case Opt_initiator_node:
1963 i_port = match_strdup(args);
1964 if (!i_port) {
1965 ret = -ENOMEM;
1966 goto out;
1967 }
1968 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1969 pr_err("APTPL metadata initiator_node="
1970 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1971 PR_APTPL_MAX_IPORT_LEN);
1972 ret = -EINVAL;
1973 break;
1974 }
1975 break;
1976 case Opt_initiator_sid:
1977 isid = match_strdup(args);
1978 if (!isid) {
1979 ret = -ENOMEM;
1980 goto out;
1981 }
1982 if (strlen(isid) >= PR_REG_ISID_LEN) {
1983 pr_err("APTPL metadata initiator_isid"
1984 "= exceeds PR_REG_ISID_LEN: %d\n",
1985 PR_REG_ISID_LEN);
1986 ret = -EINVAL;
1987 break;
1988 }
1989 break;
1990 case Opt_sa_res_key:
1991 ret = match_u64(args, &tmp_ll);
1992 if (ret < 0) {
1993 pr_err("kstrtoull() failed for sa_res_key=\n");
1994 goto out;
1995 }
1996 sa_res_key = (u64)tmp_ll;
1997 break;
1998 /*
1999 * PR APTPL Metadata for Reservation
2000 */
2001 case Opt_res_holder:
2002 ret = match_int(args, &arg);
2003 if (ret)
2004 goto out;
2005 res_holder = arg;
2006 break;
2007 case Opt_res_type:
2008 ret = match_int(args, &arg);
2009 if (ret)
2010 goto out;
2011 type = (u8)arg;
2012 break;
2013 case Opt_res_scope:
2014 ret = match_int(args, &arg);
2015 if (ret)
2016 goto out;
2017 break;
2018 case Opt_res_all_tg_pt:
2019 ret = match_int(args, &arg);
2020 if (ret)
2021 goto out;
2022 all_tg_pt = (int)arg;
2023 break;
2024 case Opt_mapped_lun:
2025 ret = match_u64(args, &tmp_ll);
2026 if (ret)
2027 goto out;
2028 mapped_lun = (u64)tmp_ll;
2029 break;
2030 /*
2031 * PR APTPL Metadata for Target Port
2032 */
2033 case Opt_target_fabric:
2034 t_fabric = match_strdup(args);
2035 if (!t_fabric) {
2036 ret = -ENOMEM;
2037 goto out;
2038 }
2039 break;
2040 case Opt_target_node:
2041 t_port = match_strdup(args);
2042 if (!t_port) {
2043 ret = -ENOMEM;
2044 goto out;
2045 }
2046 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2047 pr_err("APTPL metadata target_node="
2048 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2049 PR_APTPL_MAX_TPORT_LEN);
2050 ret = -EINVAL;
2051 break;
2052 }
2053 break;
2054 case Opt_tpgt:
2055 ret = match_int(args, &arg);
2056 if (ret)
2057 goto out;
2058 tpgt = (u16)arg;
2059 break;
2060 case Opt_port_rtpi:
2061 ret = match_int(args, &arg);
2062 if (ret)
2063 goto out;
2064 break;
2065 case Opt_target_lun:
2066 ret = match_u64(args, &tmp_ll);
2067 if (ret)
2068 goto out;
2069 target_lun = (u64)tmp_ll;
2070 break;
2071 default:
2072 break;
2073 }
2074 }
2075
2076 if (!i_port || !t_port || !sa_res_key) {
2077 pr_err("Illegal parameters for APTPL registration\n");
2078 ret = -EINVAL;
2079 goto out;
2080 }
2081
2082 if (res_holder && !(type)) {
2083 pr_err("Illegal PR type: 0x%02x for reservation"
2084 " holder\n", type);
2085 ret = -EINVAL;
2086 goto out;
2087 }
2088
2089 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2090 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2091 res_holder, all_tg_pt, type);
2092 out:
2093 kfree(i_fabric);
2094 kfree(i_port);
2095 kfree(isid);
2096 kfree(t_fabric);
2097 kfree(t_port);
2098 kfree(orig);
2099 return (ret == 0) ? count : ret;
2100 }
2101
2102
2103 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2104 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2105 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2106 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2107 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2108 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2109 CONFIGFS_ATTR_RO(target_pr_, res_type);
2110 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2111 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2112
2113 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2114 &target_pr_attr_res_holder,
2115 &target_pr_attr_res_pr_all_tgt_pts,
2116 &target_pr_attr_res_pr_generation,
2117 &target_pr_attr_res_pr_holder_tg_port,
2118 &target_pr_attr_res_pr_registered_i_pts,
2119 &target_pr_attr_res_pr_type,
2120 &target_pr_attr_res_type,
2121 &target_pr_attr_res_aptpl_active,
2122 &target_pr_attr_res_aptpl_metadata,
2123 NULL,
2124 };
2125
2126 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2127
2128 /* End functions for struct config_item_type tb_dev_pr_cit */
2129
2130 /* Start functions for struct config_item_type tb_dev_cit */
2131
to_device(struct config_item * item)2132 static inline struct se_device *to_device(struct config_item *item)
2133 {
2134 return container_of(to_config_group(item), struct se_device, dev_group);
2135 }
2136
target_dev_info_show(struct config_item * item,char * page)2137 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2138 {
2139 struct se_device *dev = to_device(item);
2140 int bl = 0;
2141 ssize_t read_bytes = 0;
2142
2143 transport_dump_dev_state(dev, page, &bl);
2144 read_bytes += bl;
2145 read_bytes += dev->transport->show_configfs_dev_params(dev,
2146 page+read_bytes);
2147 return read_bytes;
2148 }
2149
target_dev_control_store(struct config_item * item,const char * page,size_t count)2150 static ssize_t target_dev_control_store(struct config_item *item,
2151 const char *page, size_t count)
2152 {
2153 struct se_device *dev = to_device(item);
2154
2155 return dev->transport->set_configfs_dev_params(dev, page, count);
2156 }
2157
target_dev_alias_show(struct config_item * item,char * page)2158 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2159 {
2160 struct se_device *dev = to_device(item);
2161
2162 if (!(dev->dev_flags & DF_USING_ALIAS))
2163 return 0;
2164
2165 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2166 }
2167
target_dev_alias_store(struct config_item * item,const char * page,size_t count)2168 static ssize_t target_dev_alias_store(struct config_item *item,
2169 const char *page, size_t count)
2170 {
2171 struct se_device *dev = to_device(item);
2172 struct se_hba *hba = dev->se_hba;
2173 ssize_t read_bytes;
2174
2175 if (count > (SE_DEV_ALIAS_LEN-1)) {
2176 pr_err("alias count: %d exceeds"
2177 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2178 SE_DEV_ALIAS_LEN-1);
2179 return -EINVAL;
2180 }
2181
2182 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2183 if (!read_bytes)
2184 return -EINVAL;
2185 if (dev->dev_alias[read_bytes - 1] == '\n')
2186 dev->dev_alias[read_bytes - 1] = '\0';
2187
2188 dev->dev_flags |= DF_USING_ALIAS;
2189
2190 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2191 config_item_name(&hba->hba_group.cg_item),
2192 config_item_name(&dev->dev_group.cg_item),
2193 dev->dev_alias);
2194
2195 return read_bytes;
2196 }
2197
target_dev_udev_path_show(struct config_item * item,char * page)2198 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2199 {
2200 struct se_device *dev = to_device(item);
2201
2202 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2203 return 0;
2204
2205 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2206 }
2207
target_dev_udev_path_store(struct config_item * item,const char * page,size_t count)2208 static ssize_t target_dev_udev_path_store(struct config_item *item,
2209 const char *page, size_t count)
2210 {
2211 struct se_device *dev = to_device(item);
2212 struct se_hba *hba = dev->se_hba;
2213 ssize_t read_bytes;
2214
2215 if (count > (SE_UDEV_PATH_LEN-1)) {
2216 pr_err("udev_path count: %d exceeds"
2217 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2218 SE_UDEV_PATH_LEN-1);
2219 return -EINVAL;
2220 }
2221
2222 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2223 "%s", page);
2224 if (!read_bytes)
2225 return -EINVAL;
2226 if (dev->udev_path[read_bytes - 1] == '\n')
2227 dev->udev_path[read_bytes - 1] = '\0';
2228
2229 dev->dev_flags |= DF_USING_UDEV_PATH;
2230
2231 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2232 config_item_name(&hba->hba_group.cg_item),
2233 config_item_name(&dev->dev_group.cg_item),
2234 dev->udev_path);
2235
2236 return read_bytes;
2237 }
2238
target_dev_enable_show(struct config_item * item,char * page)2239 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2240 {
2241 struct se_device *dev = to_device(item);
2242
2243 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2244 }
2245
target_dev_enable_store(struct config_item * item,const char * page,size_t count)2246 static ssize_t target_dev_enable_store(struct config_item *item,
2247 const char *page, size_t count)
2248 {
2249 struct se_device *dev = to_device(item);
2250 char *ptr;
2251 int ret;
2252
2253 ptr = strstr(page, "1");
2254 if (!ptr) {
2255 pr_err("For dev_enable ops, only valid value"
2256 " is \"1\"\n");
2257 return -EINVAL;
2258 }
2259
2260 ret = target_configure_device(dev);
2261 if (ret)
2262 return ret;
2263 return count;
2264 }
2265
target_dev_alua_lu_gp_show(struct config_item * item,char * page)2266 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2267 {
2268 struct se_device *dev = to_device(item);
2269 struct config_item *lu_ci;
2270 struct t10_alua_lu_gp *lu_gp;
2271 struct t10_alua_lu_gp_member *lu_gp_mem;
2272 ssize_t len = 0;
2273
2274 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2275 if (!lu_gp_mem)
2276 return 0;
2277
2278 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2279 lu_gp = lu_gp_mem->lu_gp;
2280 if (lu_gp) {
2281 lu_ci = &lu_gp->lu_gp_group.cg_item;
2282 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2283 config_item_name(lu_ci), lu_gp->lu_gp_id);
2284 }
2285 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2286
2287 return len;
2288 }
2289
target_dev_alua_lu_gp_store(struct config_item * item,const char * page,size_t count)2290 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2291 const char *page, size_t count)
2292 {
2293 struct se_device *dev = to_device(item);
2294 struct se_hba *hba = dev->se_hba;
2295 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2296 struct t10_alua_lu_gp_member *lu_gp_mem;
2297 unsigned char buf[LU_GROUP_NAME_BUF];
2298 int move = 0;
2299
2300 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2301 if (!lu_gp_mem)
2302 return count;
2303
2304 if (count > LU_GROUP_NAME_BUF) {
2305 pr_err("ALUA LU Group Alias too large!\n");
2306 return -EINVAL;
2307 }
2308 memset(buf, 0, LU_GROUP_NAME_BUF);
2309 memcpy(buf, page, count);
2310 /*
2311 * Any ALUA logical unit alias besides "NULL" means we will be
2312 * making a new group association.
2313 */
2314 if (strcmp(strstrip(buf), "NULL")) {
2315 /*
2316 * core_alua_get_lu_gp_by_name() will increment reference to
2317 * struct t10_alua_lu_gp. This reference is released with
2318 * core_alua_get_lu_gp_by_name below().
2319 */
2320 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2321 if (!lu_gp_new)
2322 return -ENODEV;
2323 }
2324
2325 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2326 lu_gp = lu_gp_mem->lu_gp;
2327 if (lu_gp) {
2328 /*
2329 * Clearing an existing lu_gp association, and replacing
2330 * with NULL
2331 */
2332 if (!lu_gp_new) {
2333 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2334 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2335 " %hu\n",
2336 config_item_name(&hba->hba_group.cg_item),
2337 config_item_name(&dev->dev_group.cg_item),
2338 config_item_name(&lu_gp->lu_gp_group.cg_item),
2339 lu_gp->lu_gp_id);
2340
2341 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2342 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2343
2344 return count;
2345 }
2346 /*
2347 * Removing existing association of lu_gp_mem with lu_gp
2348 */
2349 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2350 move = 1;
2351 }
2352 /*
2353 * Associate lu_gp_mem with lu_gp_new.
2354 */
2355 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2356 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2357
2358 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2359 " core/alua/lu_gps/%s, ID: %hu\n",
2360 (move) ? "Moving" : "Adding",
2361 config_item_name(&hba->hba_group.cg_item),
2362 config_item_name(&dev->dev_group.cg_item),
2363 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2364 lu_gp_new->lu_gp_id);
2365
2366 core_alua_put_lu_gp_from_name(lu_gp_new);
2367 return count;
2368 }
2369
target_dev_lba_map_show(struct config_item * item,char * page)2370 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2371 {
2372 struct se_device *dev = to_device(item);
2373 struct t10_alua_lba_map *map;
2374 struct t10_alua_lba_map_member *mem;
2375 char *b = page;
2376 int bl = 0;
2377 char state;
2378
2379 spin_lock(&dev->t10_alua.lba_map_lock);
2380 if (!list_empty(&dev->t10_alua.lba_map_list))
2381 bl += sprintf(b + bl, "%u %u\n",
2382 dev->t10_alua.lba_map_segment_size,
2383 dev->t10_alua.lba_map_segment_multiplier);
2384 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2385 bl += sprintf(b + bl, "%llu %llu",
2386 map->lba_map_first_lba, map->lba_map_last_lba);
2387 list_for_each_entry(mem, &map->lba_map_mem_list,
2388 lba_map_mem_list) {
2389 switch (mem->lba_map_mem_alua_state) {
2390 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2391 state = 'O';
2392 break;
2393 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2394 state = 'A';
2395 break;
2396 case ALUA_ACCESS_STATE_STANDBY:
2397 state = 'S';
2398 break;
2399 case ALUA_ACCESS_STATE_UNAVAILABLE:
2400 state = 'U';
2401 break;
2402 default:
2403 state = '.';
2404 break;
2405 }
2406 bl += sprintf(b + bl, " %d:%c",
2407 mem->lba_map_mem_alua_pg_id, state);
2408 }
2409 bl += sprintf(b + bl, "\n");
2410 }
2411 spin_unlock(&dev->t10_alua.lba_map_lock);
2412 return bl;
2413 }
2414
target_dev_lba_map_store(struct config_item * item,const char * page,size_t count)2415 static ssize_t target_dev_lba_map_store(struct config_item *item,
2416 const char *page, size_t count)
2417 {
2418 struct se_device *dev = to_device(item);
2419 struct t10_alua_lba_map *lba_map = NULL;
2420 struct list_head lba_list;
2421 char *map_entries, *orig, *ptr;
2422 char state;
2423 int pg_num = -1, pg;
2424 int ret = 0, num = 0, pg_id, alua_state;
2425 unsigned long start_lba = -1, end_lba = -1;
2426 unsigned long segment_size = -1, segment_mult = -1;
2427
2428 orig = map_entries = kstrdup(page, GFP_KERNEL);
2429 if (!map_entries)
2430 return -ENOMEM;
2431
2432 INIT_LIST_HEAD(&lba_list);
2433 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2434 if (!*ptr)
2435 continue;
2436
2437 if (num == 0) {
2438 if (sscanf(ptr, "%lu %lu\n",
2439 &segment_size, &segment_mult) != 2) {
2440 pr_err("Invalid line %d\n", num);
2441 ret = -EINVAL;
2442 break;
2443 }
2444 num++;
2445 continue;
2446 }
2447 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2448 pr_err("Invalid line %d\n", num);
2449 ret = -EINVAL;
2450 break;
2451 }
2452 ptr = strchr(ptr, ' ');
2453 if (!ptr) {
2454 pr_err("Invalid line %d, missing end lba\n", num);
2455 ret = -EINVAL;
2456 break;
2457 }
2458 ptr++;
2459 ptr = strchr(ptr, ' ');
2460 if (!ptr) {
2461 pr_err("Invalid line %d, missing state definitions\n",
2462 num);
2463 ret = -EINVAL;
2464 break;
2465 }
2466 ptr++;
2467 lba_map = core_alua_allocate_lba_map(&lba_list,
2468 start_lba, end_lba);
2469 if (IS_ERR(lba_map)) {
2470 ret = PTR_ERR(lba_map);
2471 break;
2472 }
2473 pg = 0;
2474 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2475 switch (state) {
2476 case 'O':
2477 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2478 break;
2479 case 'A':
2480 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2481 break;
2482 case 'S':
2483 alua_state = ALUA_ACCESS_STATE_STANDBY;
2484 break;
2485 case 'U':
2486 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2487 break;
2488 default:
2489 pr_err("Invalid ALUA state '%c'\n", state);
2490 ret = -EINVAL;
2491 goto out;
2492 }
2493
2494 ret = core_alua_allocate_lba_map_mem(lba_map,
2495 pg_id, alua_state);
2496 if (ret) {
2497 pr_err("Invalid target descriptor %d:%c "
2498 "at line %d\n",
2499 pg_id, state, num);
2500 break;
2501 }
2502 pg++;
2503 ptr = strchr(ptr, ' ');
2504 if (ptr)
2505 ptr++;
2506 else
2507 break;
2508 }
2509 if (pg_num == -1)
2510 pg_num = pg;
2511 else if (pg != pg_num) {
2512 pr_err("Only %d from %d port groups definitions "
2513 "at line %d\n", pg, pg_num, num);
2514 ret = -EINVAL;
2515 break;
2516 }
2517 num++;
2518 }
2519 out:
2520 if (ret) {
2521 core_alua_free_lba_map(&lba_list);
2522 count = ret;
2523 } else
2524 core_alua_set_lba_map(dev, &lba_list,
2525 segment_size, segment_mult);
2526 kfree(orig);
2527 return count;
2528 }
2529
2530 CONFIGFS_ATTR_RO(target_dev_, info);
2531 CONFIGFS_ATTR_WO(target_dev_, control);
2532 CONFIGFS_ATTR(target_dev_, alias);
2533 CONFIGFS_ATTR(target_dev_, udev_path);
2534 CONFIGFS_ATTR(target_dev_, enable);
2535 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2536 CONFIGFS_ATTR(target_dev_, lba_map);
2537
2538 static struct configfs_attribute *target_core_dev_attrs[] = {
2539 &target_dev_attr_info,
2540 &target_dev_attr_control,
2541 &target_dev_attr_alias,
2542 &target_dev_attr_udev_path,
2543 &target_dev_attr_enable,
2544 &target_dev_attr_alua_lu_gp,
2545 &target_dev_attr_lba_map,
2546 NULL,
2547 };
2548
target_core_dev_release(struct config_item * item)2549 static void target_core_dev_release(struct config_item *item)
2550 {
2551 struct config_group *dev_cg = to_config_group(item);
2552 struct se_device *dev =
2553 container_of(dev_cg, struct se_device, dev_group);
2554
2555 target_free_device(dev);
2556 }
2557
2558 /*
2559 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2560 * within target_fabric_port_link()
2561 */
2562 struct configfs_item_operations target_core_dev_item_ops = {
2563 .release = target_core_dev_release,
2564 };
2565
2566 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2567
2568 /* End functions for struct config_item_type tb_dev_cit */
2569
2570 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2571
to_lu_gp(struct config_item * item)2572 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2573 {
2574 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2575 lu_gp_group);
2576 }
2577
target_lu_gp_lu_gp_id_show(struct config_item * item,char * page)2578 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2579 {
2580 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2581
2582 if (!lu_gp->lu_gp_valid_id)
2583 return 0;
2584 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2585 }
2586
target_lu_gp_lu_gp_id_store(struct config_item * item,const char * page,size_t count)2587 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2588 const char *page, size_t count)
2589 {
2590 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2591 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2592 unsigned long lu_gp_id;
2593 int ret;
2594
2595 ret = kstrtoul(page, 0, &lu_gp_id);
2596 if (ret < 0) {
2597 pr_err("kstrtoul() returned %d for"
2598 " lu_gp_id\n", ret);
2599 return ret;
2600 }
2601 if (lu_gp_id > 0x0000ffff) {
2602 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2603 " 0x0000ffff\n", lu_gp_id);
2604 return -EINVAL;
2605 }
2606
2607 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2608 if (ret < 0)
2609 return -EINVAL;
2610
2611 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2612 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2613 config_item_name(&alua_lu_gp_cg->cg_item),
2614 lu_gp->lu_gp_id);
2615
2616 return count;
2617 }
2618
target_lu_gp_members_show(struct config_item * item,char * page)2619 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2620 {
2621 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2622 struct se_device *dev;
2623 struct se_hba *hba;
2624 struct t10_alua_lu_gp_member *lu_gp_mem;
2625 ssize_t len = 0, cur_len;
2626 unsigned char buf[LU_GROUP_NAME_BUF];
2627
2628 memset(buf, 0, LU_GROUP_NAME_BUF);
2629
2630 spin_lock(&lu_gp->lu_gp_lock);
2631 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2632 dev = lu_gp_mem->lu_gp_mem_dev;
2633 hba = dev->se_hba;
2634
2635 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2636 config_item_name(&hba->hba_group.cg_item),
2637 config_item_name(&dev->dev_group.cg_item));
2638 cur_len++; /* Extra byte for NULL terminator */
2639
2640 if ((cur_len + len) > PAGE_SIZE) {
2641 pr_warn("Ran out of lu_gp_show_attr"
2642 "_members buffer\n");
2643 break;
2644 }
2645 memcpy(page+len, buf, cur_len);
2646 len += cur_len;
2647 }
2648 spin_unlock(&lu_gp->lu_gp_lock);
2649
2650 return len;
2651 }
2652
2653 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2654 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2655
2656 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2657 &target_lu_gp_attr_lu_gp_id,
2658 &target_lu_gp_attr_members,
2659 NULL,
2660 };
2661
target_core_alua_lu_gp_release(struct config_item * item)2662 static void target_core_alua_lu_gp_release(struct config_item *item)
2663 {
2664 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2665 struct t10_alua_lu_gp, lu_gp_group);
2666
2667 core_alua_free_lu_gp(lu_gp);
2668 }
2669
2670 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2671 .release = target_core_alua_lu_gp_release,
2672 };
2673
2674 static const struct config_item_type target_core_alua_lu_gp_cit = {
2675 .ct_item_ops = &target_core_alua_lu_gp_ops,
2676 .ct_attrs = target_core_alua_lu_gp_attrs,
2677 .ct_owner = THIS_MODULE,
2678 };
2679
2680 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2681
2682 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2683
target_core_alua_create_lu_gp(struct config_group * group,const char * name)2684 static struct config_group *target_core_alua_create_lu_gp(
2685 struct config_group *group,
2686 const char *name)
2687 {
2688 struct t10_alua_lu_gp *lu_gp;
2689 struct config_group *alua_lu_gp_cg = NULL;
2690 struct config_item *alua_lu_gp_ci = NULL;
2691
2692 lu_gp = core_alua_allocate_lu_gp(name, 0);
2693 if (IS_ERR(lu_gp))
2694 return NULL;
2695
2696 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2697 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2698
2699 config_group_init_type_name(alua_lu_gp_cg, name,
2700 &target_core_alua_lu_gp_cit);
2701
2702 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2703 " Group: core/alua/lu_gps/%s\n",
2704 config_item_name(alua_lu_gp_ci));
2705
2706 return alua_lu_gp_cg;
2707
2708 }
2709
target_core_alua_drop_lu_gp(struct config_group * group,struct config_item * item)2710 static void target_core_alua_drop_lu_gp(
2711 struct config_group *group,
2712 struct config_item *item)
2713 {
2714 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2715 struct t10_alua_lu_gp, lu_gp_group);
2716
2717 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2718 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2719 config_item_name(item), lu_gp->lu_gp_id);
2720 /*
2721 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2722 * -> target_core_alua_lu_gp_release()
2723 */
2724 config_item_put(item);
2725 }
2726
2727 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2728 .make_group = &target_core_alua_create_lu_gp,
2729 .drop_item = &target_core_alua_drop_lu_gp,
2730 };
2731
2732 static const struct config_item_type target_core_alua_lu_gps_cit = {
2733 .ct_item_ops = NULL,
2734 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2735 .ct_owner = THIS_MODULE,
2736 };
2737
2738 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2739
2740 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2741
to_tg_pt_gp(struct config_item * item)2742 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2743 {
2744 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2745 tg_pt_gp_group);
2746 }
2747
target_tg_pt_gp_alua_access_state_show(struct config_item * item,char * page)2748 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2749 char *page)
2750 {
2751 return sprintf(page, "%d\n",
2752 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2753 }
2754
target_tg_pt_gp_alua_access_state_store(struct config_item * item,const char * page,size_t count)2755 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2756 const char *page, size_t count)
2757 {
2758 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2759 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2760 unsigned long tmp;
2761 int new_state, ret;
2762
2763 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2764 pr_err("Unable to do implicit ALUA on non valid"
2765 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2766 return -EINVAL;
2767 }
2768 if (!target_dev_configured(dev)) {
2769 pr_err("Unable to set alua_access_state while device is"
2770 " not configured\n");
2771 return -ENODEV;
2772 }
2773
2774 ret = kstrtoul(page, 0, &tmp);
2775 if (ret < 0) {
2776 pr_err("Unable to extract new ALUA access state from"
2777 " %s\n", page);
2778 return ret;
2779 }
2780 new_state = (int)tmp;
2781
2782 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2783 pr_err("Unable to process implicit configfs ALUA"
2784 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2785 return -EINVAL;
2786 }
2787 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2788 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2789 /* LBA DEPENDENT is only allowed with implicit ALUA */
2790 pr_err("Unable to process implicit configfs ALUA transition"
2791 " while explicit ALUA management is enabled\n");
2792 return -EINVAL;
2793 }
2794
2795 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2796 NULL, NULL, new_state, 0);
2797 return (!ret) ? count : -EINVAL;
2798 }
2799
target_tg_pt_gp_alua_access_status_show(struct config_item * item,char * page)2800 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2801 char *page)
2802 {
2803 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2804 return sprintf(page, "%s\n",
2805 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2806 }
2807
target_tg_pt_gp_alua_access_status_store(struct config_item * item,const char * page,size_t count)2808 static ssize_t target_tg_pt_gp_alua_access_status_store(
2809 struct config_item *item, const char *page, size_t count)
2810 {
2811 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2812 unsigned long tmp;
2813 int new_status, ret;
2814
2815 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2816 pr_err("Unable to do set ALUA access status on non"
2817 " valid tg_pt_gp ID: %hu\n",
2818 tg_pt_gp->tg_pt_gp_valid_id);
2819 return -EINVAL;
2820 }
2821
2822 ret = kstrtoul(page, 0, &tmp);
2823 if (ret < 0) {
2824 pr_err("Unable to extract new ALUA access status"
2825 " from %s\n", page);
2826 return ret;
2827 }
2828 new_status = (int)tmp;
2829
2830 if ((new_status != ALUA_STATUS_NONE) &&
2831 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2832 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2833 pr_err("Illegal ALUA access status: 0x%02x\n",
2834 new_status);
2835 return -EINVAL;
2836 }
2837
2838 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2839 return count;
2840 }
2841
target_tg_pt_gp_alua_access_type_show(struct config_item * item,char * page)2842 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2843 char *page)
2844 {
2845 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2846 }
2847
target_tg_pt_gp_alua_access_type_store(struct config_item * item,const char * page,size_t count)2848 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2849 const char *page, size_t count)
2850 {
2851 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2852 }
2853
2854 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2855 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2856 struct config_item *item, char *p) \
2857 { \
2858 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2859 return sprintf(p, "%d\n", \
2860 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2861 } \
2862 \
2863 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2864 struct config_item *item, const char *p, size_t c) \
2865 { \
2866 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2867 unsigned long tmp; \
2868 int ret; \
2869 \
2870 if (!t->tg_pt_gp_valid_id) { \
2871 pr_err("Unable to do set " #_name " ALUA state on non" \
2872 " valid tg_pt_gp ID: %hu\n", \
2873 t->tg_pt_gp_valid_id); \
2874 return -EINVAL; \
2875 } \
2876 \
2877 ret = kstrtoul(p, 0, &tmp); \
2878 if (ret < 0) { \
2879 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2880 return -EINVAL; \
2881 } \
2882 if (tmp > 1) { \
2883 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2884 return -EINVAL; \
2885 } \
2886 if (tmp) \
2887 t->tg_pt_gp_alua_supported_states |= _bit; \
2888 else \
2889 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2890 \
2891 return c; \
2892 }
2893
2894 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2895 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2896 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2897 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2898 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2899 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2900 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2901
target_tg_pt_gp_alua_write_metadata_show(struct config_item * item,char * page)2902 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2903 struct config_item *item, char *page)
2904 {
2905 return sprintf(page, "%d\n",
2906 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2907 }
2908
target_tg_pt_gp_alua_write_metadata_store(struct config_item * item,const char * page,size_t count)2909 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2910 struct config_item *item, const char *page, size_t count)
2911 {
2912 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2913 unsigned long tmp;
2914 int ret;
2915
2916 ret = kstrtoul(page, 0, &tmp);
2917 if (ret < 0) {
2918 pr_err("Unable to extract alua_write_metadata\n");
2919 return ret;
2920 }
2921
2922 if ((tmp != 0) && (tmp != 1)) {
2923 pr_err("Illegal value for alua_write_metadata:"
2924 " %lu\n", tmp);
2925 return -EINVAL;
2926 }
2927 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2928
2929 return count;
2930 }
2931
target_tg_pt_gp_nonop_delay_msecs_show(struct config_item * item,char * page)2932 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2933 char *page)
2934 {
2935 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2936 }
2937
target_tg_pt_gp_nonop_delay_msecs_store(struct config_item * item,const char * page,size_t count)2938 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2939 const char *page, size_t count)
2940 {
2941 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2942 count);
2943 }
2944
target_tg_pt_gp_trans_delay_msecs_show(struct config_item * item,char * page)2945 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2946 char *page)
2947 {
2948 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2949 }
2950
target_tg_pt_gp_trans_delay_msecs_store(struct config_item * item,const char * page,size_t count)2951 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2952 const char *page, size_t count)
2953 {
2954 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2955 count);
2956 }
2957
target_tg_pt_gp_implicit_trans_secs_show(struct config_item * item,char * page)2958 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2959 struct config_item *item, char *page)
2960 {
2961 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2962 }
2963
target_tg_pt_gp_implicit_trans_secs_store(struct config_item * item,const char * page,size_t count)2964 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2965 struct config_item *item, const char *page, size_t count)
2966 {
2967 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2968 count);
2969 }
2970
target_tg_pt_gp_preferred_show(struct config_item * item,char * page)2971 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2972 char *page)
2973 {
2974 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2975 }
2976
target_tg_pt_gp_preferred_store(struct config_item * item,const char * page,size_t count)2977 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2978 const char *page, size_t count)
2979 {
2980 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2981 }
2982
target_tg_pt_gp_tg_pt_gp_id_show(struct config_item * item,char * page)2983 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2984 char *page)
2985 {
2986 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2987
2988 if (!tg_pt_gp->tg_pt_gp_valid_id)
2989 return 0;
2990 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2991 }
2992
target_tg_pt_gp_tg_pt_gp_id_store(struct config_item * item,const char * page,size_t count)2993 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2994 const char *page, size_t count)
2995 {
2996 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2997 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2998 unsigned long tg_pt_gp_id;
2999 int ret;
3000
3001 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3002 if (ret < 0) {
3003 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3004 page);
3005 return ret;
3006 }
3007 if (tg_pt_gp_id > 0x0000ffff) {
3008 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3009 tg_pt_gp_id);
3010 return -EINVAL;
3011 }
3012
3013 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3014 if (ret < 0)
3015 return -EINVAL;
3016
3017 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3018 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3019 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3020 tg_pt_gp->tg_pt_gp_id);
3021
3022 return count;
3023 }
3024
target_tg_pt_gp_members_show(struct config_item * item,char * page)3025 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3026 char *page)
3027 {
3028 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3029 struct se_lun *lun;
3030 ssize_t len = 0, cur_len;
3031 unsigned char buf[TG_PT_GROUP_NAME_BUF];
3032
3033 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
3034
3035 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3036 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3037 lun_tg_pt_gp_link) {
3038 struct se_portal_group *tpg = lun->lun_tpg;
3039
3040 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3041 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3042 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3043 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3044 config_item_name(&lun->lun_group.cg_item));
3045 cur_len++; /* Extra byte for NULL terminator */
3046
3047 if ((cur_len + len) > PAGE_SIZE) {
3048 pr_warn("Ran out of lu_gp_show_attr"
3049 "_members buffer\n");
3050 break;
3051 }
3052 memcpy(page+len, buf, cur_len);
3053 len += cur_len;
3054 }
3055 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3056
3057 return len;
3058 }
3059
3060 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3061 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3062 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3063 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3064 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3065 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3066 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3067 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3068 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3069 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3070 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3071 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3072 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3073 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3074 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3075 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3076 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3077
3078 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3079 &target_tg_pt_gp_attr_alua_access_state,
3080 &target_tg_pt_gp_attr_alua_access_status,
3081 &target_tg_pt_gp_attr_alua_access_type,
3082 &target_tg_pt_gp_attr_alua_support_transitioning,
3083 &target_tg_pt_gp_attr_alua_support_offline,
3084 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3085 &target_tg_pt_gp_attr_alua_support_unavailable,
3086 &target_tg_pt_gp_attr_alua_support_standby,
3087 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3088 &target_tg_pt_gp_attr_alua_support_active_optimized,
3089 &target_tg_pt_gp_attr_alua_write_metadata,
3090 &target_tg_pt_gp_attr_nonop_delay_msecs,
3091 &target_tg_pt_gp_attr_trans_delay_msecs,
3092 &target_tg_pt_gp_attr_implicit_trans_secs,
3093 &target_tg_pt_gp_attr_preferred,
3094 &target_tg_pt_gp_attr_tg_pt_gp_id,
3095 &target_tg_pt_gp_attr_members,
3096 NULL,
3097 };
3098
target_core_alua_tg_pt_gp_release(struct config_item * item)3099 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3100 {
3101 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3102 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3103
3104 core_alua_free_tg_pt_gp(tg_pt_gp);
3105 }
3106
3107 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3108 .release = target_core_alua_tg_pt_gp_release,
3109 };
3110
3111 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3112 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3113 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3114 .ct_owner = THIS_MODULE,
3115 };
3116
3117 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3118
3119 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3120
target_core_alua_create_tg_pt_gp(struct config_group * group,const char * name)3121 static struct config_group *target_core_alua_create_tg_pt_gp(
3122 struct config_group *group,
3123 const char *name)
3124 {
3125 struct t10_alua *alua = container_of(group, struct t10_alua,
3126 alua_tg_pt_gps_group);
3127 struct t10_alua_tg_pt_gp *tg_pt_gp;
3128 struct config_group *alua_tg_pt_gp_cg = NULL;
3129 struct config_item *alua_tg_pt_gp_ci = NULL;
3130
3131 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3132 if (!tg_pt_gp)
3133 return NULL;
3134
3135 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3136 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3137
3138 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3139 &target_core_alua_tg_pt_gp_cit);
3140
3141 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3142 " Group: alua/tg_pt_gps/%s\n",
3143 config_item_name(alua_tg_pt_gp_ci));
3144
3145 return alua_tg_pt_gp_cg;
3146 }
3147
target_core_alua_drop_tg_pt_gp(struct config_group * group,struct config_item * item)3148 static void target_core_alua_drop_tg_pt_gp(
3149 struct config_group *group,
3150 struct config_item *item)
3151 {
3152 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3153 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3154
3155 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3156 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3157 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3158 /*
3159 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3160 * -> target_core_alua_tg_pt_gp_release().
3161 */
3162 config_item_put(item);
3163 }
3164
3165 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3166 .make_group = &target_core_alua_create_tg_pt_gp,
3167 .drop_item = &target_core_alua_drop_tg_pt_gp,
3168 };
3169
3170 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3171
3172 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3173
3174 /* Start functions for struct config_item_type target_core_alua_cit */
3175
3176 /*
3177 * target_core_alua_cit is a ConfigFS group that lives under
3178 * /sys/kernel/config/target/core/alua. There are default groups
3179 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3180 * target_core_alua_cit in target_core_init_configfs() below.
3181 */
3182 static const struct config_item_type target_core_alua_cit = {
3183 .ct_item_ops = NULL,
3184 .ct_attrs = NULL,
3185 .ct_owner = THIS_MODULE,
3186 };
3187
3188 /* End functions for struct config_item_type target_core_alua_cit */
3189
3190 /* Start functions for struct config_item_type tb_dev_stat_cit */
3191
target_core_stat_mkdir(struct config_group * group,const char * name)3192 static struct config_group *target_core_stat_mkdir(
3193 struct config_group *group,
3194 const char *name)
3195 {
3196 return ERR_PTR(-ENOSYS);
3197 }
3198
target_core_stat_rmdir(struct config_group * group,struct config_item * item)3199 static void target_core_stat_rmdir(
3200 struct config_group *group,
3201 struct config_item *item)
3202 {
3203 return;
3204 }
3205
3206 static struct configfs_group_operations target_core_stat_group_ops = {
3207 .make_group = &target_core_stat_mkdir,
3208 .drop_item = &target_core_stat_rmdir,
3209 };
3210
3211 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3212
3213 /* End functions for struct config_item_type tb_dev_stat_cit */
3214
3215 /* Start functions for struct config_item_type target_core_hba_cit */
3216
target_core_make_subdev(struct config_group * group,const char * name)3217 static struct config_group *target_core_make_subdev(
3218 struct config_group *group,
3219 const char *name)
3220 {
3221 struct t10_alua_tg_pt_gp *tg_pt_gp;
3222 struct config_item *hba_ci = &group->cg_item;
3223 struct se_hba *hba = item_to_hba(hba_ci);
3224 struct target_backend *tb = hba->backend;
3225 struct se_device *dev;
3226 int errno = -ENOMEM, ret;
3227
3228 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3229 if (ret)
3230 return ERR_PTR(ret);
3231
3232 dev = target_alloc_device(hba, name);
3233 if (!dev)
3234 goto out_unlock;
3235
3236 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3237
3238 config_group_init_type_name(&dev->dev_action_group, "action",
3239 &tb->tb_dev_action_cit);
3240 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3241
3242 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3243 &tb->tb_dev_attrib_cit);
3244 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3245
3246 config_group_init_type_name(&dev->dev_pr_group, "pr",
3247 &tb->tb_dev_pr_cit);
3248 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3249
3250 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3251 &tb->tb_dev_wwn_cit);
3252 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3253 &dev->dev_group);
3254
3255 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3256 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3257 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3258 &dev->dev_group);
3259
3260 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3261 "statistics", &tb->tb_dev_stat_cit);
3262 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3263 &dev->dev_group);
3264
3265 /*
3266 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3267 */
3268 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3269 if (!tg_pt_gp)
3270 goto out_free_device;
3271 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3272
3273 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3274 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3275 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3276 &dev->t10_alua.alua_tg_pt_gps_group);
3277
3278 /*
3279 * Add core/$HBA/$DEV/statistics/ default groups
3280 */
3281 target_stat_setup_dev_default_groups(dev);
3282
3283 mutex_unlock(&hba->hba_access_mutex);
3284 return &dev->dev_group;
3285
3286 out_free_device:
3287 target_free_device(dev);
3288 out_unlock:
3289 mutex_unlock(&hba->hba_access_mutex);
3290 return ERR_PTR(errno);
3291 }
3292
target_core_drop_subdev(struct config_group * group,struct config_item * item)3293 static void target_core_drop_subdev(
3294 struct config_group *group,
3295 struct config_item *item)
3296 {
3297 struct config_group *dev_cg = to_config_group(item);
3298 struct se_device *dev =
3299 container_of(dev_cg, struct se_device, dev_group);
3300 struct se_hba *hba;
3301
3302 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3303
3304 mutex_lock(&hba->hba_access_mutex);
3305
3306 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3307 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3308
3309 /*
3310 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3311 * directly from target_core_alua_tg_pt_gp_release().
3312 */
3313 dev->t10_alua.default_tg_pt_gp = NULL;
3314
3315 configfs_remove_default_groups(dev_cg);
3316
3317 /*
3318 * se_dev is released from target_core_dev_item_ops->release()
3319 */
3320 config_item_put(item);
3321 mutex_unlock(&hba->hba_access_mutex);
3322 }
3323
3324 static struct configfs_group_operations target_core_hba_group_ops = {
3325 .make_group = target_core_make_subdev,
3326 .drop_item = target_core_drop_subdev,
3327 };
3328
3329
to_hba(struct config_item * item)3330 static inline struct se_hba *to_hba(struct config_item *item)
3331 {
3332 return container_of(to_config_group(item), struct se_hba, hba_group);
3333 }
3334
target_hba_info_show(struct config_item * item,char * page)3335 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3336 {
3337 struct se_hba *hba = to_hba(item);
3338
3339 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3340 hba->hba_id, hba->backend->ops->name,
3341 TARGET_CORE_VERSION);
3342 }
3343
target_hba_mode_show(struct config_item * item,char * page)3344 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3345 {
3346 struct se_hba *hba = to_hba(item);
3347 int hba_mode = 0;
3348
3349 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3350 hba_mode = 1;
3351
3352 return sprintf(page, "%d\n", hba_mode);
3353 }
3354
target_hba_mode_store(struct config_item * item,const char * page,size_t count)3355 static ssize_t target_hba_mode_store(struct config_item *item,
3356 const char *page, size_t count)
3357 {
3358 struct se_hba *hba = to_hba(item);
3359 unsigned long mode_flag;
3360 int ret;
3361
3362 if (hba->backend->ops->pmode_enable_hba == NULL)
3363 return -EINVAL;
3364
3365 ret = kstrtoul(page, 0, &mode_flag);
3366 if (ret < 0) {
3367 pr_err("Unable to extract hba mode flag: %d\n", ret);
3368 return ret;
3369 }
3370
3371 if (hba->dev_count) {
3372 pr_err("Unable to set hba_mode with active devices\n");
3373 return -EINVAL;
3374 }
3375
3376 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3377 if (ret < 0)
3378 return -EINVAL;
3379 if (ret > 0)
3380 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3381 else if (ret == 0)
3382 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3383
3384 return count;
3385 }
3386
3387 CONFIGFS_ATTR_RO(target_, hba_info);
3388 CONFIGFS_ATTR(target_, hba_mode);
3389
target_core_hba_release(struct config_item * item)3390 static void target_core_hba_release(struct config_item *item)
3391 {
3392 struct se_hba *hba = container_of(to_config_group(item),
3393 struct se_hba, hba_group);
3394 core_delete_hba(hba);
3395 }
3396
3397 static struct configfs_attribute *target_core_hba_attrs[] = {
3398 &target_attr_hba_info,
3399 &target_attr_hba_mode,
3400 NULL,
3401 };
3402
3403 static struct configfs_item_operations target_core_hba_item_ops = {
3404 .release = target_core_hba_release,
3405 };
3406
3407 static const struct config_item_type target_core_hba_cit = {
3408 .ct_item_ops = &target_core_hba_item_ops,
3409 .ct_group_ops = &target_core_hba_group_ops,
3410 .ct_attrs = target_core_hba_attrs,
3411 .ct_owner = THIS_MODULE,
3412 };
3413
target_core_call_addhbatotarget(struct config_group * group,const char * name)3414 static struct config_group *target_core_call_addhbatotarget(
3415 struct config_group *group,
3416 const char *name)
3417 {
3418 char *se_plugin_str, *str, *str2;
3419 struct se_hba *hba;
3420 char buf[TARGET_CORE_NAME_MAX_LEN];
3421 unsigned long plugin_dep_id = 0;
3422 int ret;
3423
3424 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3425 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3426 pr_err("Passed *name strlen(): %d exceeds"
3427 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3428 TARGET_CORE_NAME_MAX_LEN);
3429 return ERR_PTR(-ENAMETOOLONG);
3430 }
3431 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3432
3433 str = strstr(buf, "_");
3434 if (!str) {
3435 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3436 return ERR_PTR(-EINVAL);
3437 }
3438 se_plugin_str = buf;
3439 /*
3440 * Special case for subsystem plugins that have "_" in their names.
3441 * Namely rd_direct and rd_mcp..
3442 */
3443 str2 = strstr(str+1, "_");
3444 if (str2) {
3445 *str2 = '\0'; /* Terminate for *se_plugin_str */
3446 str2++; /* Skip to start of plugin dependent ID */
3447 str = str2;
3448 } else {
3449 *str = '\0'; /* Terminate for *se_plugin_str */
3450 str++; /* Skip to start of plugin dependent ID */
3451 }
3452
3453 ret = kstrtoul(str, 0, &plugin_dep_id);
3454 if (ret < 0) {
3455 pr_err("kstrtoul() returned %d for"
3456 " plugin_dep_id\n", ret);
3457 return ERR_PTR(ret);
3458 }
3459 /*
3460 * Load up TCM subsystem plugins if they have not already been loaded.
3461 */
3462 transport_subsystem_check_init();
3463
3464 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3465 if (IS_ERR(hba))
3466 return ERR_CAST(hba);
3467
3468 config_group_init_type_name(&hba->hba_group, name,
3469 &target_core_hba_cit);
3470
3471 return &hba->hba_group;
3472 }
3473
target_core_call_delhbafromtarget(struct config_group * group,struct config_item * item)3474 static void target_core_call_delhbafromtarget(
3475 struct config_group *group,
3476 struct config_item *item)
3477 {
3478 /*
3479 * core_delete_hba() is called from target_core_hba_item_ops->release()
3480 * -> target_core_hba_release()
3481 */
3482 config_item_put(item);
3483 }
3484
3485 static struct configfs_group_operations target_core_group_ops = {
3486 .make_group = target_core_call_addhbatotarget,
3487 .drop_item = target_core_call_delhbafromtarget,
3488 };
3489
3490 static const struct config_item_type target_core_cit = {
3491 .ct_item_ops = NULL,
3492 .ct_group_ops = &target_core_group_ops,
3493 .ct_attrs = NULL,
3494 .ct_owner = THIS_MODULE,
3495 };
3496
3497 /* Stop functions for struct config_item_type target_core_hba_cit */
3498
target_setup_backend_cits(struct target_backend * tb)3499 void target_setup_backend_cits(struct target_backend *tb)
3500 {
3501 target_core_setup_dev_cit(tb);
3502 target_core_setup_dev_action_cit(tb);
3503 target_core_setup_dev_attrib_cit(tb);
3504 target_core_setup_dev_pr_cit(tb);
3505 target_core_setup_dev_wwn_cit(tb);
3506 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3507 target_core_setup_dev_stat_cit(tb);
3508 }
3509
target_init_dbroot(void)3510 static void target_init_dbroot(void)
3511 {
3512 struct file *fp;
3513
3514 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3515 fp = filp_open(db_root_stage, O_RDONLY, 0);
3516 if (IS_ERR(fp)) {
3517 pr_err("db_root: cannot open: %s\n", db_root_stage);
3518 return;
3519 }
3520 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3521 filp_close(fp, NULL);
3522 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3523 return;
3524 }
3525 filp_close(fp, NULL);
3526
3527 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3528 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3529 }
3530
target_core_init_configfs(void)3531 static int __init target_core_init_configfs(void)
3532 {
3533 struct configfs_subsystem *subsys = &target_core_fabrics;
3534 struct t10_alua_lu_gp *lu_gp;
3535 int ret;
3536
3537 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3538 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3539 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3540
3541 config_group_init(&subsys->su_group);
3542 mutex_init(&subsys->su_mutex);
3543
3544 ret = init_se_kmem_caches();
3545 if (ret < 0)
3546 return ret;
3547 /*
3548 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3549 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3550 */
3551 config_group_init_type_name(&target_core_hbagroup, "core",
3552 &target_core_cit);
3553 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3554
3555 /*
3556 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3557 */
3558 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3559 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3560
3561 /*
3562 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3563 * groups under /sys/kernel/config/target/core/alua/
3564 */
3565 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3566 &target_core_alua_lu_gps_cit);
3567 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3568
3569 /*
3570 * Add core/alua/lu_gps/default_lu_gp
3571 */
3572 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3573 if (IS_ERR(lu_gp)) {
3574 ret = -ENOMEM;
3575 goto out_global;
3576 }
3577
3578 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3579 &target_core_alua_lu_gp_cit);
3580 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3581
3582 default_lu_gp = lu_gp;
3583
3584 /*
3585 * Register the target_core_mod subsystem with configfs.
3586 */
3587 ret = configfs_register_subsystem(subsys);
3588 if (ret < 0) {
3589 pr_err("Error %d while registering subsystem %s\n",
3590 ret, subsys->su_group.cg_item.ci_namebuf);
3591 goto out_global;
3592 }
3593 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3594 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3595 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3596 /*
3597 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3598 */
3599 ret = rd_module_init();
3600 if (ret < 0)
3601 goto out;
3602
3603 ret = core_dev_setup_virtual_lun0();
3604 if (ret < 0)
3605 goto out;
3606
3607 ret = target_xcopy_setup_pt();
3608 if (ret < 0)
3609 goto out;
3610
3611 target_init_dbroot();
3612
3613 return 0;
3614
3615 out:
3616 configfs_unregister_subsystem(subsys);
3617 core_dev_release_virtual_lun0();
3618 rd_module_exit();
3619 out_global:
3620 if (default_lu_gp) {
3621 core_alua_free_lu_gp(default_lu_gp);
3622 default_lu_gp = NULL;
3623 }
3624 release_se_kmem_caches();
3625 return ret;
3626 }
3627
target_core_exit_configfs(void)3628 static void __exit target_core_exit_configfs(void)
3629 {
3630 configfs_remove_default_groups(&alua_lu_gps_group);
3631 configfs_remove_default_groups(&alua_group);
3632 configfs_remove_default_groups(&target_core_hbagroup);
3633
3634 /*
3635 * We expect subsys->su_group.default_groups to be released
3636 * by configfs subsystem provider logic..
3637 */
3638 configfs_unregister_subsystem(&target_core_fabrics);
3639
3640 core_alua_free_lu_gp(default_lu_gp);
3641 default_lu_gp = NULL;
3642
3643 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3644 " Infrastructure\n");
3645
3646 core_dev_release_virtual_lun0();
3647 rd_module_exit();
3648 target_xcopy_release_pt();
3649 release_se_kmem_caches();
3650 }
3651
3652 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3653 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3654 MODULE_LICENSE("GPL");
3655 MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);
3656
3657 module_init(target_core_init_configfs);
3658 module_exit(target_core_exit_configfs);
3659