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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/kstrtox.h>
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <generated/utsrelease.h>
19#include <linux/utsname.h>
20#include <linux/init.h>
21#include <linux/fs.h>
22#include <linux/namei.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/delay.h>
26#include <linux/unistd.h>
27#include <linux/string.h>
28#include <linux/parser.h>
29#include <linux/syscalls.h>
30#include <linux/configfs.h>
31#include <linux/spinlock.h>
32
33#include <target/target_core_base.h>
34#include <target/target_core_backend.h>
35#include <target/target_core_fabric.h>
36
37#include "target_core_internal.h"
38#include "target_core_alua.h"
39#include "target_core_pr.h"
40#include "target_core_rd.h"
41#include "target_core_xcopy.h"
42
43#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
44static void target_core_setup_##_name##_cit(struct target_backend *tb) \
45{ \
46 struct config_item_type *cit = &tb->tb_##_name##_cit; \
47 \
48 cit->ct_item_ops = _item_ops; \
49 cit->ct_group_ops = _group_ops; \
50 cit->ct_attrs = _attrs; \
51 cit->ct_owner = tb->ops->owner; \
52 pr_debug("Setup generic %s\n", __stringify(_name)); \
53}
54
55#define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
56static void target_core_setup_##_name##_cit(struct target_backend *tb) \
57{ \
58 struct config_item_type *cit = &tb->tb_##_name##_cit; \
59 \
60 cit->ct_item_ops = _item_ops; \
61 cit->ct_group_ops = _group_ops; \
62 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
63 cit->ct_owner = tb->ops->owner; \
64 pr_debug("Setup generic %s\n", __stringify(_name)); \
65}
66
67extern struct t10_alua_lu_gp *default_lu_gp;
68
69static LIST_HEAD(g_tf_list);
70static DEFINE_MUTEX(g_tf_lock);
71
72static struct config_group target_core_hbagroup;
73static struct config_group alua_group;
74static struct config_group alua_lu_gps_group;
75
76static unsigned int target_devices;
77static DEFINE_MUTEX(target_devices_lock);
78
79static inline struct se_hba *
80item_to_hba(struct config_item *item)
81{
82 return container_of(to_config_group(item), struct se_hba, hba_group);
83}
84
85/*
86 * Attributes for /sys/kernel/config/target/
87 */
88static ssize_t target_core_item_version_show(struct config_item *item,
89 char *page)
90{
91 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
92 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
93 utsname()->sysname, utsname()->machine);
94}
95
96CONFIGFS_ATTR_RO(target_core_item_, version);
97
98char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
99static char db_root_stage[DB_ROOT_LEN];
100
101static ssize_t target_core_item_dbroot_show(struct config_item *item,
102 char *page)
103{
104 return sprintf(page, "%s\n", db_root);
105}
106
107static ssize_t target_core_item_dbroot_store(struct config_item *item,
108 const char *page, size_t count)
109{
110 ssize_t read_bytes;
111 struct file *fp;
112 ssize_t r = -EINVAL;
113
114 mutex_lock(&target_devices_lock);
115 if (target_devices) {
116 pr_err("db_root: cannot be changed because it's in use\n");
117 goto unlock;
118 }
119
120 if (count > (DB_ROOT_LEN - 1)) {
121 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
122 (int)count, DB_ROOT_LEN - 1);
123 goto unlock;
124 }
125
126 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
127 if (!read_bytes)
128 goto unlock;
129
130 if (db_root_stage[read_bytes - 1] == '\n')
131 db_root_stage[read_bytes - 1] = '\0';
132
133 /* validate new db root before accepting it */
134 fp = filp_open(db_root_stage, O_RDONLY, 0);
135 if (IS_ERR(fp)) {
136 pr_err("db_root: cannot open: %s\n", db_root_stage);
137 goto unlock;
138 }
139 if (!S_ISDIR(file_inode(fp)->i_mode)) {
140 filp_close(fp, NULL);
141 pr_err("db_root: not a directory: %s\n", db_root_stage);
142 goto unlock;
143 }
144 filp_close(fp, NULL);
145
146 strncpy(db_root, db_root_stage, read_bytes);
147 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
148
149 r = read_bytes;
150
151unlock:
152 mutex_unlock(&target_devices_lock);
153 return r;
154}
155
156CONFIGFS_ATTR(target_core_item_, dbroot);
157
158static struct target_fabric_configfs *target_core_get_fabric(
159 const char *name)
160{
161 struct target_fabric_configfs *tf;
162
163 if (!name)
164 return NULL;
165
166 mutex_lock(&g_tf_lock);
167 list_for_each_entry(tf, &g_tf_list, tf_list) {
168 const char *cmp_name = tf->tf_ops->fabric_alias;
169 if (!cmp_name)
170 cmp_name = tf->tf_ops->fabric_name;
171 if (!strcmp(cmp_name, name)) {
172 atomic_inc(&tf->tf_access_cnt);
173 mutex_unlock(&g_tf_lock);
174 return tf;
175 }
176 }
177 mutex_unlock(&g_tf_lock);
178
179 return NULL;
180}
181
182/*
183 * Called from struct target_core_group_ops->make_group()
184 */
185static struct config_group *target_core_register_fabric(
186 struct config_group *group,
187 const char *name)
188{
189 struct target_fabric_configfs *tf;
190 int ret;
191
192 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
193 " %s\n", group, name);
194
195 tf = target_core_get_fabric(name);
196 if (!tf) {
197 pr_debug("target_core_register_fabric() trying autoload for %s\n",
198 name);
199
200 /*
201 * Below are some hardcoded request_module() calls to automatically
202 * local fabric modules when the following is called:
203 *
204 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
205 *
206 * Note that this does not limit which TCM fabric module can be
207 * registered, but simply provids auto loading logic for modules with
208 * mkdir(2) system calls with known TCM fabric modules.
209 */
210
211 if (!strncmp(name, "iscsi", 5)) {
212 /*
213 * Automatically load the LIO Target fabric module when the
214 * following is called:
215 *
216 * mkdir -p $CONFIGFS/target/iscsi
217 */
218 ret = request_module("iscsi_target_mod");
219 if (ret < 0) {
220 pr_debug("request_module() failed for"
221 " iscsi_target_mod.ko: %d\n", ret);
222 return ERR_PTR(-EINVAL);
223 }
224 } else if (!strncmp(name, "loopback", 8)) {
225 /*
226 * Automatically load the tcm_loop fabric module when the
227 * following is called:
228 *
229 * mkdir -p $CONFIGFS/target/loopback
230 */
231 ret = request_module("tcm_loop");
232 if (ret < 0) {
233 pr_debug("request_module() failed for"
234 " tcm_loop.ko: %d\n", ret);
235 return ERR_PTR(-EINVAL);
236 }
237 }
238
239 tf = target_core_get_fabric(name);
240 }
241
242 if (!tf) {
243 pr_debug("target_core_get_fabric() failed for %s\n",
244 name);
245 return ERR_PTR(-EINVAL);
246 }
247 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
248 " %s\n", tf->tf_ops->fabric_name);
249 /*
250 * On a successful target_core_get_fabric() look, the returned
251 * struct target_fabric_configfs *tf will contain a usage reference.
252 */
253 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
254 &tf->tf_wwn_cit);
255
256 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
257
258 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
259 &tf->tf_discovery_cit);
260 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
261
262 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
263 config_item_name(&tf->tf_group.cg_item));
264 return &tf->tf_group;
265}
266
267/*
268 * Called from struct target_core_group_ops->drop_item()
269 */
270static void target_core_deregister_fabric(
271 struct config_group *group,
272 struct config_item *item)
273{
274 struct target_fabric_configfs *tf = container_of(
275 to_config_group(item), struct target_fabric_configfs, tf_group);
276
277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
278 " tf list\n", config_item_name(item));
279
280 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
281 " %s\n", tf->tf_ops->fabric_name);
282 atomic_dec(&tf->tf_access_cnt);
283
284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
285 " %s\n", config_item_name(item));
286
287 configfs_remove_default_groups(&tf->tf_group);
288 config_item_put(item);
289}
290
291static struct configfs_group_operations target_core_fabric_group_ops = {
292 .make_group = &target_core_register_fabric,
293 .drop_item = &target_core_deregister_fabric,
294};
295
296/*
297 * All item attributes appearing in /sys/kernel/target/ appear here.
298 */
299static struct configfs_attribute *target_core_fabric_item_attrs[] = {
300 &target_core_item_attr_version,
301 &target_core_item_attr_dbroot,
302 NULL,
303};
304
305/*
306 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
307 */
308static const struct config_item_type target_core_fabrics_item = {
309 .ct_group_ops = &target_core_fabric_group_ops,
310 .ct_attrs = target_core_fabric_item_attrs,
311 .ct_owner = THIS_MODULE,
312};
313
314static struct configfs_subsystem target_core_fabrics = {
315 .su_group = {
316 .cg_item = {
317 .ci_namebuf = "target",
318 .ci_type = &target_core_fabrics_item,
319 },
320 },
321};
322
323int target_depend_item(struct config_item *item)
324{
325 return configfs_depend_item(&target_core_fabrics, item);
326}
327EXPORT_SYMBOL(target_depend_item);
328
329void target_undepend_item(struct config_item *item)
330{
331 return configfs_undepend_item(item);
332}
333EXPORT_SYMBOL(target_undepend_item);
334
335/*##############################################################################
336// Start functions called by external Target Fabrics Modules
337//############################################################################*/
338
339static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
340{
341 if (tfo->fabric_alias) {
342 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
343 pr_err("Passed alias: %s exceeds "
344 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
345 return -EINVAL;
346 }
347 }
348 if (!tfo->fabric_name) {
349 pr_err("Missing tfo->fabric_name\n");
350 return -EINVAL;
351 }
352 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
353 pr_err("Passed name: %s exceeds "
354 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
355 return -EINVAL;
356 }
357 if (!tfo->tpg_get_wwn) {
358 pr_err("Missing tfo->tpg_get_wwn()\n");
359 return -EINVAL;
360 }
361 if (!tfo->tpg_get_tag) {
362 pr_err("Missing tfo->tpg_get_tag()\n");
363 return -EINVAL;
364 }
365 if (!tfo->tpg_check_demo_mode) {
366 pr_err("Missing tfo->tpg_check_demo_mode()\n");
367 return -EINVAL;
368 }
369 if (!tfo->tpg_check_demo_mode_cache) {
370 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
371 return -EINVAL;
372 }
373 if (!tfo->tpg_check_demo_mode_write_protect) {
374 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
375 return -EINVAL;
376 }
377 if (!tfo->tpg_check_prod_mode_write_protect) {
378 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
379 return -EINVAL;
380 }
381 if (!tfo->tpg_get_inst_index) {
382 pr_err("Missing tfo->tpg_get_inst_index()\n");
383 return -EINVAL;
384 }
385 if (!tfo->release_cmd) {
386 pr_err("Missing tfo->release_cmd()\n");
387 return -EINVAL;
388 }
389 if (!tfo->sess_get_index) {
390 pr_err("Missing tfo->sess_get_index()\n");
391 return -EINVAL;
392 }
393 if (!tfo->write_pending) {
394 pr_err("Missing tfo->write_pending()\n");
395 return -EINVAL;
396 }
397 if (!tfo->set_default_node_attributes) {
398 pr_err("Missing tfo->set_default_node_attributes()\n");
399 return -EINVAL;
400 }
401 if (!tfo->get_cmd_state) {
402 pr_err("Missing tfo->get_cmd_state()\n");
403 return -EINVAL;
404 }
405 if (!tfo->queue_data_in) {
406 pr_err("Missing tfo->queue_data_in()\n");
407 return -EINVAL;
408 }
409 if (!tfo->queue_status) {
410 pr_err("Missing tfo->queue_status()\n");
411 return -EINVAL;
412 }
413 if (!tfo->queue_tm_rsp) {
414 pr_err("Missing tfo->queue_tm_rsp()\n");
415 return -EINVAL;
416 }
417 if (!tfo->aborted_task) {
418 pr_err("Missing tfo->aborted_task()\n");
419 return -EINVAL;
420 }
421 if (!tfo->check_stop_free) {
422 pr_err("Missing tfo->check_stop_free()\n");
423 return -EINVAL;
424 }
425 /*
426 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
427 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
428 * target_core_fabric_configfs.c WWN+TPG group context code.
429 */
430 if (!tfo->fabric_make_wwn) {
431 pr_err("Missing tfo->fabric_make_wwn()\n");
432 return -EINVAL;
433 }
434 if (!tfo->fabric_drop_wwn) {
435 pr_err("Missing tfo->fabric_drop_wwn()\n");
436 return -EINVAL;
437 }
438 if (!tfo->fabric_make_tpg) {
439 pr_err("Missing tfo->fabric_make_tpg()\n");
440 return -EINVAL;
441 }
442 if (!tfo->fabric_drop_tpg) {
443 pr_err("Missing tfo->fabric_drop_tpg()\n");
444 return -EINVAL;
445 }
446
447 return 0;
448}
449
450int target_register_template(const struct target_core_fabric_ops *fo)
451{
452 struct target_fabric_configfs *tf;
453 int ret;
454
455 ret = target_fabric_tf_ops_check(fo);
456 if (ret)
457 return ret;
458
459 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
460 if (!tf) {
461 pr_err("%s: could not allocate memory!\n", __func__);
462 return -ENOMEM;
463 }
464
465 INIT_LIST_HEAD(&tf->tf_list);
466 atomic_set(&tf->tf_access_cnt, 0);
467 tf->tf_ops = fo;
468 target_fabric_setup_cits(tf);
469
470 mutex_lock(&g_tf_lock);
471 list_add_tail(&tf->tf_list, &g_tf_list);
472 mutex_unlock(&g_tf_lock);
473
474 return 0;
475}
476EXPORT_SYMBOL(target_register_template);
477
478void target_unregister_template(const struct target_core_fabric_ops *fo)
479{
480 struct target_fabric_configfs *t;
481
482 mutex_lock(&g_tf_lock);
483 list_for_each_entry(t, &g_tf_list, tf_list) {
484 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
485 BUG_ON(atomic_read(&t->tf_access_cnt));
486 list_del(&t->tf_list);
487 mutex_unlock(&g_tf_lock);
488 /*
489 * Wait for any outstanding fabric se_deve_entry->rcu_head
490 * callbacks to complete post kfree_rcu(), before allowing
491 * fabric driver unload of TFO->module to proceed.
492 */
493 rcu_barrier();
494 kfree(t->tf_tpg_base_cit.ct_attrs);
495 kfree(t);
496 return;
497 }
498 }
499 mutex_unlock(&g_tf_lock);
500}
501EXPORT_SYMBOL(target_unregister_template);
502
503/*##############################################################################
504// Stop functions called by external Target Fabrics Modules
505//############################################################################*/
506
507static inline struct se_dev_attrib *to_attrib(struct config_item *item)
508{
509 return container_of(to_config_group(item), struct se_dev_attrib,
510 da_group);
511}
512
513/* Start functions for struct config_item_type tb_dev_attrib_cit */
514#define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
515static ssize_t _name##_show(struct config_item *item, char *page) \
516{ \
517 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
518}
519
520DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
521DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
522DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
523DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
524DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
525DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
526DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
527DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
528DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
529DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
530DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
531DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
532DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
533DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
534DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
535DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
536DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
537DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
538DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
539DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
540DEF_CONFIGFS_ATTRIB_SHOW(block_size);
541DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
542DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
543DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
544DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
545DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
546DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
547DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
548DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
549DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
550DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
551DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc);
552
553#define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
554static ssize_t _name##_store(struct config_item *item, const char *page,\
555 size_t count) \
556{ \
557 struct se_dev_attrib *da = to_attrib(item); \
558 u32 val; \
559 int ret; \
560 \
561 ret = kstrtou32(page, 0, &val); \
562 if (ret < 0) \
563 return ret; \
564 da->_name = val; \
565 return count; \
566}
567
568DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
569DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
570DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
571DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
572DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
573
574#define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
575static ssize_t _name##_store(struct config_item *item, const char *page, \
576 size_t count) \
577{ \
578 struct se_dev_attrib *da = to_attrib(item); \
579 bool flag; \
580 int ret; \
581 \
582 ret = kstrtobool(page, &flag); \
583 if (ret < 0) \
584 return ret; \
585 da->_name = flag; \
586 return count; \
587}
588
589DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
590DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
591DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
592DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
593DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
594DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
595
596#define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
597static ssize_t _name##_store(struct config_item *item, const char *page,\
598 size_t count) \
599{ \
600 printk_once(KERN_WARNING \
601 "ignoring deprecated %s attribute\n", \
602 __stringify(_name)); \
603 return count; \
604}
605
606DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
607DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
608
609static void dev_set_t10_wwn_model_alias(struct se_device *dev)
610{
611 const char *configname;
612
613 configname = config_item_name(&dev->dev_group.cg_item);
614 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
615 pr_warn("dev[%p]: Backstore name '%s' is too long for "
616 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
617 configname);
618 }
619 /*
620 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
621 * here without potentially breaking existing setups, so continue to
622 * truncate one byte shorter than what can be carried in INQUIRY.
623 */
624 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
625}
626
627static ssize_t emulate_model_alias_store(struct config_item *item,
628 const char *page, size_t count)
629{
630 struct se_dev_attrib *da = to_attrib(item);
631 struct se_device *dev = da->da_dev;
632 bool flag;
633 int ret;
634
635 if (dev->export_count) {
636 pr_err("dev[%p]: Unable to change model alias"
637 " while export_count is %d\n",
638 dev, dev->export_count);
639 return -EINVAL;
640 }
641
642 ret = kstrtobool(page, &flag);
643 if (ret < 0)
644 return ret;
645
646 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
647 if (flag) {
648 dev_set_t10_wwn_model_alias(dev);
649 } else {
650 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
651 sizeof(dev->t10_wwn.model));
652 }
653 da->emulate_model_alias = flag;
654 return count;
655}
656
657static ssize_t emulate_write_cache_store(struct config_item *item,
658 const char *page, size_t count)
659{
660 struct se_dev_attrib *da = to_attrib(item);
661 bool flag;
662 int ret;
663
664 ret = kstrtobool(page, &flag);
665 if (ret < 0)
666 return ret;
667
668 if (flag && da->da_dev->transport->get_write_cache) {
669 pr_err("emulate_write_cache not supported for this device\n");
670 return -EINVAL;
671 }
672
673 da->emulate_write_cache = flag;
674 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
675 da->da_dev, flag);
676 return count;
677}
678
679static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
680 const char *page, size_t count)
681{
682 struct se_dev_attrib *da = to_attrib(item);
683 u32 val;
684 int ret;
685
686 ret = kstrtou32(page, 0, &val);
687 if (ret < 0)
688 return ret;
689
690 if (val != TARGET_UA_INTLCK_CTRL_CLEAR
691 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
692 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
693 pr_err("Illegal value %d\n", val);
694 return -EINVAL;
695 }
696
697 if (da->da_dev->export_count) {
698 pr_err("dev[%p]: Unable to change SE Device"
699 " UA_INTRLCK_CTRL while export_count is %d\n",
700 da->da_dev, da->da_dev->export_count);
701 return -EINVAL;
702 }
703 da->emulate_ua_intlck_ctrl = val;
704 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
705 da->da_dev, val);
706 return count;
707}
708
709static ssize_t emulate_tas_store(struct config_item *item,
710 const char *page, size_t count)
711{
712 struct se_dev_attrib *da = to_attrib(item);
713 bool flag;
714 int ret;
715
716 ret = kstrtobool(page, &flag);
717 if (ret < 0)
718 return ret;
719
720 if (da->da_dev->export_count) {
721 pr_err("dev[%p]: Unable to change SE Device TAS while"
722 " export_count is %d\n",
723 da->da_dev, da->da_dev->export_count);
724 return -EINVAL;
725 }
726 da->emulate_tas = flag;
727 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
728 da->da_dev, flag ? "Enabled" : "Disabled");
729
730 return count;
731}
732
733static ssize_t emulate_tpu_store(struct config_item *item,
734 const char *page, size_t count)
735{
736 struct se_dev_attrib *da = to_attrib(item);
737 struct se_device *dev = da->da_dev;
738 bool flag;
739 int ret;
740
741 ret = kstrtobool(page, &flag);
742 if (ret < 0)
743 return ret;
744
745 /*
746 * We expect this value to be non-zero when generic Block Layer
747 * Discard supported is detected iblock_create_virtdevice().
748 */
749 if (flag && !da->max_unmap_block_desc_count) {
750 if (!dev->transport->configure_unmap ||
751 !dev->transport->configure_unmap(dev)) {
752 pr_err("Generic Block Discard not supported\n");
753 return -ENOSYS;
754 }
755 }
756
757 da->emulate_tpu = flag;
758 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
759 da->da_dev, flag);
760 return count;
761}
762
763static ssize_t emulate_tpws_store(struct config_item *item,
764 const char *page, size_t count)
765{
766 struct se_dev_attrib *da = to_attrib(item);
767 struct se_device *dev = da->da_dev;
768 bool flag;
769 int ret;
770
771 ret = kstrtobool(page, &flag);
772 if (ret < 0)
773 return ret;
774
775 /*
776 * We expect this value to be non-zero when generic Block Layer
777 * Discard supported is detected iblock_create_virtdevice().
778 */
779 if (flag && !da->max_unmap_block_desc_count) {
780 if (!dev->transport->configure_unmap ||
781 !dev->transport->configure_unmap(dev)) {
782 pr_err("Generic Block Discard not supported\n");
783 return -ENOSYS;
784 }
785 }
786
787 da->emulate_tpws = flag;
788 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
789 da->da_dev, flag);
790 return count;
791}
792
793static ssize_t pi_prot_type_store(struct config_item *item,
794 const char *page, size_t count)
795{
796 struct se_dev_attrib *da = to_attrib(item);
797 int old_prot = da->pi_prot_type, ret;
798 struct se_device *dev = da->da_dev;
799 u32 flag;
800
801 ret = kstrtou32(page, 0, &flag);
802 if (ret < 0)
803 return ret;
804
805 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
806 pr_err("Illegal value %d for pi_prot_type\n", flag);
807 return -EINVAL;
808 }
809 if (flag == 2) {
810 pr_err("DIF TYPE2 protection currently not supported\n");
811 return -ENOSYS;
812 }
813 if (da->hw_pi_prot_type) {
814 pr_warn("DIF protection enabled on underlying hardware,"
815 " ignoring\n");
816 return count;
817 }
818 if (!dev->transport->init_prot || !dev->transport->free_prot) {
819 /* 0 is only allowed value for non-supporting backends */
820 if (flag == 0)
821 return count;
822
823 pr_err("DIF protection not supported by backend: %s\n",
824 dev->transport->name);
825 return -ENOSYS;
826 }
827 if (!target_dev_configured(dev)) {
828 pr_err("DIF protection requires device to be configured\n");
829 return -ENODEV;
830 }
831 if (dev->export_count) {
832 pr_err("dev[%p]: Unable to change SE Device PROT type while"
833 " export_count is %d\n", dev, dev->export_count);
834 return -EINVAL;
835 }
836
837 da->pi_prot_type = flag;
838
839 if (flag && !old_prot) {
840 ret = dev->transport->init_prot(dev);
841 if (ret) {
842 da->pi_prot_type = old_prot;
843 da->pi_prot_verify = (bool) da->pi_prot_type;
844 return ret;
845 }
846
847 } else if (!flag && old_prot) {
848 dev->transport->free_prot(dev);
849 }
850
851 da->pi_prot_verify = (bool) da->pi_prot_type;
852 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
853 return count;
854}
855
856/* always zero, but attr needs to remain RW to avoid userspace breakage */
857static ssize_t pi_prot_format_show(struct config_item *item, char *page)
858{
859 return snprintf(page, PAGE_SIZE, "0\n");
860}
861
862static ssize_t pi_prot_format_store(struct config_item *item,
863 const char *page, size_t count)
864{
865 struct se_dev_attrib *da = to_attrib(item);
866 struct se_device *dev = da->da_dev;
867 bool flag;
868 int ret;
869
870 ret = kstrtobool(page, &flag);
871 if (ret < 0)
872 return ret;
873
874 if (!flag)
875 return count;
876
877 if (!dev->transport->format_prot) {
878 pr_err("DIF protection format not supported by backend %s\n",
879 dev->transport->name);
880 return -ENOSYS;
881 }
882 if (!target_dev_configured(dev)) {
883 pr_err("DIF protection format requires device to be configured\n");
884 return -ENODEV;
885 }
886 if (dev->export_count) {
887 pr_err("dev[%p]: Unable to format SE Device PROT type while"
888 " export_count is %d\n", dev, dev->export_count);
889 return -EINVAL;
890 }
891
892 ret = dev->transport->format_prot(dev);
893 if (ret)
894 return ret;
895
896 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
897 return count;
898}
899
900static ssize_t pi_prot_verify_store(struct config_item *item,
901 const char *page, size_t count)
902{
903 struct se_dev_attrib *da = to_attrib(item);
904 bool flag;
905 int ret;
906
907 ret = kstrtobool(page, &flag);
908 if (ret < 0)
909 return ret;
910
911 if (!flag) {
912 da->pi_prot_verify = flag;
913 return count;
914 }
915 if (da->hw_pi_prot_type) {
916 pr_warn("DIF protection enabled on underlying hardware,"
917 " ignoring\n");
918 return count;
919 }
920 if (!da->pi_prot_type) {
921 pr_warn("DIF protection not supported by backend, ignoring\n");
922 return count;
923 }
924 da->pi_prot_verify = flag;
925
926 return count;
927}
928
929static ssize_t force_pr_aptpl_store(struct config_item *item,
930 const char *page, size_t count)
931{
932 struct se_dev_attrib *da = to_attrib(item);
933 bool flag;
934 int ret;
935
936 ret = kstrtobool(page, &flag);
937 if (ret < 0)
938 return ret;
939 if (da->da_dev->export_count) {
940 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
941 " export_count is %d\n",
942 da->da_dev, da->da_dev->export_count);
943 return -EINVAL;
944 }
945
946 da->force_pr_aptpl = flag;
947 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
948 return count;
949}
950
951static ssize_t emulate_rest_reord_store(struct config_item *item,
952 const char *page, size_t count)
953{
954 struct se_dev_attrib *da = to_attrib(item);
955 bool flag;
956 int ret;
957
958 ret = kstrtobool(page, &flag);
959 if (ret < 0)
960 return ret;
961
962 if (flag != 0) {
963 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
964 " reordering not implemented\n", da->da_dev);
965 return -ENOSYS;
966 }
967 da->emulate_rest_reord = flag;
968 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
969 da->da_dev, flag);
970 return count;
971}
972
973static ssize_t unmap_zeroes_data_store(struct config_item *item,
974 const char *page, size_t count)
975{
976 struct se_dev_attrib *da = to_attrib(item);
977 struct se_device *dev = da->da_dev;
978 bool flag;
979 int ret;
980
981 ret = kstrtobool(page, &flag);
982 if (ret < 0)
983 return ret;
984
985 if (da->da_dev->export_count) {
986 pr_err("dev[%p]: Unable to change SE Device"
987 " unmap_zeroes_data while export_count is %d\n",
988 da->da_dev, da->da_dev->export_count);
989 return -EINVAL;
990 }
991 /*
992 * We expect this value to be non-zero when generic Block Layer
993 * Discard supported is detected iblock_configure_device().
994 */
995 if (flag && !da->max_unmap_block_desc_count) {
996 if (!dev->transport->configure_unmap ||
997 !dev->transport->configure_unmap(dev)) {
998 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set because max_unmap_block_desc_count is zero\n",
999 da->da_dev);
1000 return -ENOSYS;
1001 }
1002 }
1003 da->unmap_zeroes_data = flag;
1004 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
1005 da->da_dev, flag);
1006 return count;
1007}
1008
1009/*
1010 * Note, this can only be called on unexported SE Device Object.
1011 */
1012static ssize_t queue_depth_store(struct config_item *item,
1013 const char *page, size_t count)
1014{
1015 struct se_dev_attrib *da = to_attrib(item);
1016 struct se_device *dev = da->da_dev;
1017 u32 val;
1018 int ret;
1019
1020 ret = kstrtou32(page, 0, &val);
1021 if (ret < 0)
1022 return ret;
1023
1024 if (dev->export_count) {
1025 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1026 " export_count is %d\n",
1027 dev, dev->export_count);
1028 return -EINVAL;
1029 }
1030 if (!val) {
1031 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1032 return -EINVAL;
1033 }
1034
1035 if (val > dev->dev_attrib.queue_depth) {
1036 if (val > dev->dev_attrib.hw_queue_depth) {
1037 pr_err("dev[%p]: Passed queue_depth:"
1038 " %u exceeds TCM/SE_Device MAX"
1039 " TCQ: %u\n", dev, val,
1040 dev->dev_attrib.hw_queue_depth);
1041 return -EINVAL;
1042 }
1043 }
1044 da->queue_depth = dev->queue_depth = val;
1045 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1046 return count;
1047}
1048
1049static ssize_t optimal_sectors_store(struct config_item *item,
1050 const char *page, size_t count)
1051{
1052 struct se_dev_attrib *da = to_attrib(item);
1053 u32 val;
1054 int ret;
1055
1056 ret = kstrtou32(page, 0, &val);
1057 if (ret < 0)
1058 return ret;
1059
1060 if (da->da_dev->export_count) {
1061 pr_err("dev[%p]: Unable to change SE Device"
1062 " optimal_sectors while export_count is %d\n",
1063 da->da_dev, da->da_dev->export_count);
1064 return -EINVAL;
1065 }
1066 if (val > da->hw_max_sectors) {
1067 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1068 " greater than hw_max_sectors: %u\n",
1069 da->da_dev, val, da->hw_max_sectors);
1070 return -EINVAL;
1071 }
1072
1073 da->optimal_sectors = val;
1074 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1075 da->da_dev, val);
1076 return count;
1077}
1078
1079static ssize_t block_size_store(struct config_item *item,
1080 const char *page, size_t count)
1081{
1082 struct se_dev_attrib *da = to_attrib(item);
1083 u32 val;
1084 int ret;
1085
1086 ret = kstrtou32(page, 0, &val);
1087 if (ret < 0)
1088 return ret;
1089
1090 if (da->da_dev->export_count) {
1091 pr_err("dev[%p]: Unable to change SE Device block_size"
1092 " while export_count is %d\n",
1093 da->da_dev, da->da_dev->export_count);
1094 return -EINVAL;
1095 }
1096
1097 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1098 pr_err("dev[%p]: Illegal value for block_device: %u"
1099 " for SE device, must be 512, 1024, 2048 or 4096\n",
1100 da->da_dev, val);
1101 return -EINVAL;
1102 }
1103
1104 da->block_size = val;
1105
1106 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1107 da->da_dev, val);
1108 return count;
1109}
1110
1111static ssize_t alua_support_show(struct config_item *item, char *page)
1112{
1113 struct se_dev_attrib *da = to_attrib(item);
1114 u8 flags = da->da_dev->transport_flags;
1115
1116 return snprintf(page, PAGE_SIZE, "%d\n",
1117 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1118}
1119
1120static ssize_t alua_support_store(struct config_item *item,
1121 const char *page, size_t count)
1122{
1123 struct se_dev_attrib *da = to_attrib(item);
1124 struct se_device *dev = da->da_dev;
1125 bool flag, oldflag;
1126 int ret;
1127
1128 ret = kstrtobool(page, &flag);
1129 if (ret < 0)
1130 return ret;
1131
1132 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1133 if (flag == oldflag)
1134 return count;
1135
1136 if (!(dev->transport->transport_flags_changeable &
1137 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1138 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1139 " alua_support has fixed value\n", dev);
1140 return -ENOSYS;
1141 }
1142
1143 if (flag)
1144 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1145 else
1146 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1147 return count;
1148}
1149
1150static ssize_t pgr_support_show(struct config_item *item, char *page)
1151{
1152 struct se_dev_attrib *da = to_attrib(item);
1153 u8 flags = da->da_dev->transport_flags;
1154
1155 return snprintf(page, PAGE_SIZE, "%d\n",
1156 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1157}
1158
1159static ssize_t pgr_support_store(struct config_item *item,
1160 const char *page, size_t count)
1161{
1162 struct se_dev_attrib *da = to_attrib(item);
1163 struct se_device *dev = da->da_dev;
1164 bool flag, oldflag;
1165 int ret;
1166
1167 ret = kstrtobool(page, &flag);
1168 if (ret < 0)
1169 return ret;
1170
1171 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1172 if (flag == oldflag)
1173 return count;
1174
1175 if (!(dev->transport->transport_flags_changeable &
1176 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1177 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1178 " pgr_support has fixed value\n", dev);
1179 return -ENOSYS;
1180 }
1181
1182 if (flag)
1183 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1184 else
1185 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1186 return count;
1187}
1188
1189static ssize_t emulate_rsoc_store(struct config_item *item,
1190 const char *page, size_t count)
1191{
1192 struct se_dev_attrib *da = to_attrib(item);
1193 bool flag;
1194 int ret;
1195
1196 ret = kstrtobool(page, &flag);
1197 if (ret < 0)
1198 return ret;
1199
1200 da->emulate_rsoc = flag;
1201 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n",
1202 da->da_dev, flag);
1203 return count;
1204}
1205
1206CONFIGFS_ATTR(, emulate_model_alias);
1207CONFIGFS_ATTR(, emulate_dpo);
1208CONFIGFS_ATTR(, emulate_fua_write);
1209CONFIGFS_ATTR(, emulate_fua_read);
1210CONFIGFS_ATTR(, emulate_write_cache);
1211CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1212CONFIGFS_ATTR(, emulate_tas);
1213CONFIGFS_ATTR(, emulate_tpu);
1214CONFIGFS_ATTR(, emulate_tpws);
1215CONFIGFS_ATTR(, emulate_caw);
1216CONFIGFS_ATTR(, emulate_3pc);
1217CONFIGFS_ATTR(, emulate_pr);
1218CONFIGFS_ATTR(, emulate_rsoc);
1219CONFIGFS_ATTR(, pi_prot_type);
1220CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1221CONFIGFS_ATTR(, pi_prot_format);
1222CONFIGFS_ATTR(, pi_prot_verify);
1223CONFIGFS_ATTR(, enforce_pr_isids);
1224CONFIGFS_ATTR(, is_nonrot);
1225CONFIGFS_ATTR(, emulate_rest_reord);
1226CONFIGFS_ATTR(, force_pr_aptpl);
1227CONFIGFS_ATTR_RO(, hw_block_size);
1228CONFIGFS_ATTR(, block_size);
1229CONFIGFS_ATTR_RO(, hw_max_sectors);
1230CONFIGFS_ATTR(, optimal_sectors);
1231CONFIGFS_ATTR_RO(, hw_queue_depth);
1232CONFIGFS_ATTR(, queue_depth);
1233CONFIGFS_ATTR(, max_unmap_lba_count);
1234CONFIGFS_ATTR(, max_unmap_block_desc_count);
1235CONFIGFS_ATTR(, unmap_granularity);
1236CONFIGFS_ATTR(, unmap_granularity_alignment);
1237CONFIGFS_ATTR(, unmap_zeroes_data);
1238CONFIGFS_ATTR(, max_write_same_len);
1239CONFIGFS_ATTR(, alua_support);
1240CONFIGFS_ATTR(, pgr_support);
1241
1242/*
1243 * dev_attrib attributes for devices using the target core SBC/SPC
1244 * interpreter. Any backend using spc_parse_cdb should be using
1245 * these.
1246 */
1247struct configfs_attribute *sbc_attrib_attrs[] = {
1248 &attr_emulate_model_alias,
1249 &attr_emulate_dpo,
1250 &attr_emulate_fua_write,
1251 &attr_emulate_fua_read,
1252 &attr_emulate_write_cache,
1253 &attr_emulate_ua_intlck_ctrl,
1254 &attr_emulate_tas,
1255 &attr_emulate_tpu,
1256 &attr_emulate_tpws,
1257 &attr_emulate_caw,
1258 &attr_emulate_3pc,
1259 &attr_emulate_pr,
1260 &attr_pi_prot_type,
1261 &attr_hw_pi_prot_type,
1262 &attr_pi_prot_format,
1263 &attr_pi_prot_verify,
1264 &attr_enforce_pr_isids,
1265 &attr_is_nonrot,
1266 &attr_emulate_rest_reord,
1267 &attr_force_pr_aptpl,
1268 &attr_hw_block_size,
1269 &attr_block_size,
1270 &attr_hw_max_sectors,
1271 &attr_optimal_sectors,
1272 &attr_hw_queue_depth,
1273 &attr_queue_depth,
1274 &attr_max_unmap_lba_count,
1275 &attr_max_unmap_block_desc_count,
1276 &attr_unmap_granularity,
1277 &attr_unmap_granularity_alignment,
1278 &attr_unmap_zeroes_data,
1279 &attr_max_write_same_len,
1280 &attr_alua_support,
1281 &attr_pgr_support,
1282 &attr_emulate_rsoc,
1283 NULL,
1284};
1285EXPORT_SYMBOL(sbc_attrib_attrs);
1286
1287/*
1288 * Minimal dev_attrib attributes for devices passing through CDBs.
1289 * In this case we only provide a few read-only attributes for
1290 * backwards compatibility.
1291 */
1292struct configfs_attribute *passthrough_attrib_attrs[] = {
1293 &attr_hw_pi_prot_type,
1294 &attr_hw_block_size,
1295 &attr_hw_max_sectors,
1296 &attr_hw_queue_depth,
1297 &attr_emulate_pr,
1298 &attr_alua_support,
1299 &attr_pgr_support,
1300 NULL,
1301};
1302EXPORT_SYMBOL(passthrough_attrib_attrs);
1303
1304/*
1305 * pr related dev_attrib attributes for devices passing through CDBs,
1306 * but allowing in core pr emulation.
1307 */
1308struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1309 &attr_enforce_pr_isids,
1310 &attr_force_pr_aptpl,
1311 NULL,
1312};
1313EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1314
1315TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1316TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1317
1318/* End functions for struct config_item_type tb_dev_attrib_cit */
1319
1320/* Start functions for struct config_item_type tb_dev_wwn_cit */
1321
1322static struct t10_wwn *to_t10_wwn(struct config_item *item)
1323{
1324 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1325}
1326
1327static ssize_t target_check_inquiry_data(char *buf)
1328{
1329 size_t len;
1330 int i;
1331
1332 len = strlen(buf);
1333
1334 /*
1335 * SPC 4.3.1:
1336 * ASCII data fields shall contain only ASCII printable characters
1337 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1338 * more ASCII null (00h) characters.
1339 */
1340 for (i = 0; i < len; i++) {
1341 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1342 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1343 return -EINVAL;
1344 }
1345 }
1346
1347 return len;
1348}
1349
1350/*
1351 * STANDARD and VPD page 0x83 T10 Vendor Identification
1352 */
1353static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1354 char *page)
1355{
1356 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1357}
1358
1359static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1360 const char *page, size_t count)
1361{
1362 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1363 struct se_device *dev = t10_wwn->t10_dev;
1364 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1365 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1366 char *stripped = NULL;
1367 size_t len;
1368 ssize_t ret;
1369
1370 len = strlcpy(buf, page, sizeof(buf));
1371 if (len < sizeof(buf)) {
1372 /* Strip any newline added from userspace. */
1373 stripped = strstrip(buf);
1374 len = strlen(stripped);
1375 }
1376 if (len > INQUIRY_VENDOR_LEN) {
1377 pr_err("Emulated T10 Vendor Identification exceeds"
1378 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1379 "\n");
1380 return -EOVERFLOW;
1381 }
1382
1383 ret = target_check_inquiry_data(stripped);
1384
1385 if (ret < 0)
1386 return ret;
1387
1388 /*
1389 * Check to see if any active exports exist. If they do exist, fail
1390 * here as changing this information on the fly (underneath the
1391 * initiator side OS dependent multipath code) could cause negative
1392 * effects.
1393 */
1394 if (dev->export_count) {
1395 pr_err("Unable to set T10 Vendor Identification while"
1396 " active %d exports exist\n", dev->export_count);
1397 return -EINVAL;
1398 }
1399
1400 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1401 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1402
1403 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1404 " %s\n", dev->t10_wwn.vendor);
1405
1406 return count;
1407}
1408
1409static ssize_t target_wwn_product_id_show(struct config_item *item,
1410 char *page)
1411{
1412 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1413}
1414
1415static ssize_t target_wwn_product_id_store(struct config_item *item,
1416 const char *page, size_t count)
1417{
1418 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1419 struct se_device *dev = t10_wwn->t10_dev;
1420 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1421 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1422 char *stripped = NULL;
1423 size_t len;
1424 ssize_t ret;
1425
1426 len = strlcpy(buf, page, sizeof(buf));
1427 if (len < sizeof(buf)) {
1428 /* Strip any newline added from userspace. */
1429 stripped = strstrip(buf);
1430 len = strlen(stripped);
1431 }
1432 if (len > INQUIRY_MODEL_LEN) {
1433 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1434 __stringify(INQUIRY_MODEL_LEN)
1435 "\n");
1436 return -EOVERFLOW;
1437 }
1438
1439 ret = target_check_inquiry_data(stripped);
1440
1441 if (ret < 0)
1442 return ret;
1443
1444 /*
1445 * Check to see if any active exports exist. If they do exist, fail
1446 * here as changing this information on the fly (underneath the
1447 * initiator side OS dependent multipath code) could cause negative
1448 * effects.
1449 */
1450 if (dev->export_count) {
1451 pr_err("Unable to set T10 Model while active %d exports exist\n",
1452 dev->export_count);
1453 return -EINVAL;
1454 }
1455
1456 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1457 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1458
1459 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1460 dev->t10_wwn.model);
1461
1462 return count;
1463}
1464
1465static ssize_t target_wwn_revision_show(struct config_item *item,
1466 char *page)
1467{
1468 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1469}
1470
1471static ssize_t target_wwn_revision_store(struct config_item *item,
1472 const char *page, size_t count)
1473{
1474 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1475 struct se_device *dev = t10_wwn->t10_dev;
1476 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1477 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1478 char *stripped = NULL;
1479 size_t len;
1480 ssize_t ret;
1481
1482 len = strlcpy(buf, page, sizeof(buf));
1483 if (len < sizeof(buf)) {
1484 /* Strip any newline added from userspace. */
1485 stripped = strstrip(buf);
1486 len = strlen(stripped);
1487 }
1488 if (len > INQUIRY_REVISION_LEN) {
1489 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1490 __stringify(INQUIRY_REVISION_LEN)
1491 "\n");
1492 return -EOVERFLOW;
1493 }
1494
1495 ret = target_check_inquiry_data(stripped);
1496
1497 if (ret < 0)
1498 return ret;
1499
1500 /*
1501 * Check to see if any active exports exist. If they do exist, fail
1502 * here as changing this information on the fly (underneath the
1503 * initiator side OS dependent multipath code) could cause negative
1504 * effects.
1505 */
1506 if (dev->export_count) {
1507 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1508 dev->export_count);
1509 return -EINVAL;
1510 }
1511
1512 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1513 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1514
1515 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1516 dev->t10_wwn.revision);
1517
1518 return count;
1519}
1520
1521static ssize_t
1522target_wwn_company_id_show(struct config_item *item,
1523 char *page)
1524{
1525 return snprintf(page, PAGE_SIZE, "%#08x\n",
1526 to_t10_wwn(item)->company_id);
1527}
1528
1529static ssize_t
1530target_wwn_company_id_store(struct config_item *item,
1531 const char *page, size_t count)
1532{
1533 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1534 struct se_device *dev = t10_wwn->t10_dev;
1535 u32 val;
1536 int ret;
1537
1538 /*
1539 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1540 * form OUI assigned by the IEEE.
1541 */
1542 ret = kstrtou32(page, 0, &val);
1543 if (ret < 0)
1544 return ret;
1545
1546 if (val >= 0x1000000)
1547 return -EOVERFLOW;
1548
1549 /*
1550 * Check to see if any active exports exist. If they do exist, fail
1551 * here as changing this information on the fly (underneath the
1552 * initiator side OS dependent multipath code) could cause negative
1553 * effects.
1554 */
1555 if (dev->export_count) {
1556 pr_err("Unable to set Company ID while %u exports exist\n",
1557 dev->export_count);
1558 return -EINVAL;
1559 }
1560
1561 t10_wwn->company_id = val;
1562
1563 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1564 t10_wwn->company_id);
1565
1566 return count;
1567}
1568
1569/*
1570 * VPD page 0x80 Unit serial
1571 */
1572static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1573 char *page)
1574{
1575 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1576 &to_t10_wwn(item)->unit_serial[0]);
1577}
1578
1579static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1580 const char *page, size_t count)
1581{
1582 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1583 struct se_device *dev = t10_wwn->t10_dev;
1584 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1585
1586 /*
1587 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1588 * from the struct scsi_device level firmware, do not allow
1589 * VPD Unit Serial to be emulated.
1590 *
1591 * Note this struct scsi_device could also be emulating VPD
1592 * information from its drivers/scsi LLD. But for now we assume
1593 * it is doing 'the right thing' wrt a world wide unique
1594 * VPD Unit Serial Number that OS dependent multipath can depend on.
1595 */
1596 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1597 pr_err("Underlying SCSI device firmware provided VPD"
1598 " Unit Serial, ignoring request\n");
1599 return -EOPNOTSUPP;
1600 }
1601
1602 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1603 pr_err("Emulated VPD Unit Serial exceeds"
1604 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1605 return -EOVERFLOW;
1606 }
1607 /*
1608 * Check to see if any active $FABRIC_MOD exports exist. If they
1609 * do exist, fail here as changing this information on the fly
1610 * (underneath the initiator side OS dependent multipath code)
1611 * could cause negative effects.
1612 */
1613 if (dev->export_count) {
1614 pr_err("Unable to set VPD Unit Serial while"
1615 " active %d $FABRIC_MOD exports exist\n",
1616 dev->export_count);
1617 return -EINVAL;
1618 }
1619
1620 /*
1621 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1622 *
1623 * Also, strip any newline added from the userspace
1624 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1625 */
1626 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1627 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1628 "%s", strstrip(buf));
1629 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1630
1631 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1632 " %s\n", dev->t10_wwn.unit_serial);
1633
1634 return count;
1635}
1636
1637/*
1638 * VPD page 0x83 Protocol Identifier
1639 */
1640static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1641 char *page)
1642{
1643 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1644 struct t10_vpd *vpd;
1645 unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1646 ssize_t len = 0;
1647
1648 spin_lock(&t10_wwn->t10_vpd_lock);
1649 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1650 if (!vpd->protocol_identifier_set)
1651 continue;
1652
1653 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1654
1655 if (len + strlen(buf) >= PAGE_SIZE)
1656 break;
1657
1658 len += sprintf(page+len, "%s", buf);
1659 }
1660 spin_unlock(&t10_wwn->t10_vpd_lock);
1661
1662 return len;
1663}
1664
1665/*
1666 * Generic wrapper for dumping VPD identifiers by association.
1667 */
1668#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1669static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1670 char *page) \
1671{ \
1672 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1673 struct t10_vpd *vpd; \
1674 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1675 ssize_t len = 0; \
1676 \
1677 spin_lock(&t10_wwn->t10_vpd_lock); \
1678 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1679 if (vpd->association != _assoc) \
1680 continue; \
1681 \
1682 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1683 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1684 if (len + strlen(buf) >= PAGE_SIZE) \
1685 break; \
1686 len += sprintf(page+len, "%s", buf); \
1687 \
1688 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1689 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1690 if (len + strlen(buf) >= PAGE_SIZE) \
1691 break; \
1692 len += sprintf(page+len, "%s", buf); \
1693 \
1694 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1695 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1696 if (len + strlen(buf) >= PAGE_SIZE) \
1697 break; \
1698 len += sprintf(page+len, "%s", buf); \
1699 } \
1700 spin_unlock(&t10_wwn->t10_vpd_lock); \
1701 \
1702 return len; \
1703}
1704
1705/* VPD page 0x83 Association: Logical Unit */
1706DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1707/* VPD page 0x83 Association: Target Port */
1708DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1709/* VPD page 0x83 Association: SCSI Target Device */
1710DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1711
1712CONFIGFS_ATTR(target_wwn_, vendor_id);
1713CONFIGFS_ATTR(target_wwn_, product_id);
1714CONFIGFS_ATTR(target_wwn_, revision);
1715CONFIGFS_ATTR(target_wwn_, company_id);
1716CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1717CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1718CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1719CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1720CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1721
1722static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1723 &target_wwn_attr_vendor_id,
1724 &target_wwn_attr_product_id,
1725 &target_wwn_attr_revision,
1726 &target_wwn_attr_company_id,
1727 &target_wwn_attr_vpd_unit_serial,
1728 &target_wwn_attr_vpd_protocol_identifier,
1729 &target_wwn_attr_vpd_assoc_logical_unit,
1730 &target_wwn_attr_vpd_assoc_target_port,
1731 &target_wwn_attr_vpd_assoc_scsi_target_device,
1732 NULL,
1733};
1734
1735TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1736
1737/* End functions for struct config_item_type tb_dev_wwn_cit */
1738
1739/* Start functions for struct config_item_type tb_dev_pr_cit */
1740
1741static struct se_device *pr_to_dev(struct config_item *item)
1742{
1743 return container_of(to_config_group(item), struct se_device,
1744 dev_pr_group);
1745}
1746
1747static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1748 char *page)
1749{
1750 struct se_node_acl *se_nacl;
1751 struct t10_pr_registration *pr_reg;
1752 char i_buf[PR_REG_ISID_ID_LEN] = { };
1753
1754 pr_reg = dev->dev_pr_res_holder;
1755 if (!pr_reg)
1756 return sprintf(page, "No SPC-3 Reservation holder\n");
1757
1758 se_nacl = pr_reg->pr_reg_nacl;
1759 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1760
1761 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1762 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1763 se_nacl->initiatorname, i_buf);
1764}
1765
1766static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1767 char *page)
1768{
1769 struct se_session *sess = dev->reservation_holder;
1770 struct se_node_acl *se_nacl;
1771 ssize_t len;
1772
1773 if (sess) {
1774 se_nacl = sess->se_node_acl;
1775 len = sprintf(page,
1776 "SPC-2 Reservation: %s Initiator: %s\n",
1777 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1778 se_nacl->initiatorname);
1779 } else {
1780 len = sprintf(page, "No SPC-2 Reservation holder\n");
1781 }
1782 return len;
1783}
1784
1785static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1786{
1787 struct se_device *dev = pr_to_dev(item);
1788 int ret;
1789
1790 if (!dev->dev_attrib.emulate_pr)
1791 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1792
1793 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1794 return sprintf(page, "Passthrough\n");
1795
1796 spin_lock(&dev->dev_reservation_lock);
1797 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1798 ret = target_core_dev_pr_show_spc2_res(dev, page);
1799 else
1800 ret = target_core_dev_pr_show_spc3_res(dev, page);
1801 spin_unlock(&dev->dev_reservation_lock);
1802 return ret;
1803}
1804
1805static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1806 char *page)
1807{
1808 struct se_device *dev = pr_to_dev(item);
1809 ssize_t len = 0;
1810
1811 spin_lock(&dev->dev_reservation_lock);
1812 if (!dev->dev_pr_res_holder) {
1813 len = sprintf(page, "No SPC-3 Reservation holder\n");
1814 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1815 len = sprintf(page, "SPC-3 Reservation: All Target"
1816 " Ports registration\n");
1817 } else {
1818 len = sprintf(page, "SPC-3 Reservation: Single"
1819 " Target Port registration\n");
1820 }
1821
1822 spin_unlock(&dev->dev_reservation_lock);
1823 return len;
1824}
1825
1826static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1827 char *page)
1828{
1829 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1830}
1831
1832
1833static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1834 char *page)
1835{
1836 struct se_device *dev = pr_to_dev(item);
1837 struct se_node_acl *se_nacl;
1838 struct se_portal_group *se_tpg;
1839 struct t10_pr_registration *pr_reg;
1840 const struct target_core_fabric_ops *tfo;
1841 ssize_t len = 0;
1842
1843 spin_lock(&dev->dev_reservation_lock);
1844 pr_reg = dev->dev_pr_res_holder;
1845 if (!pr_reg) {
1846 len = sprintf(page, "No SPC-3 Reservation holder\n");
1847 goto out_unlock;
1848 }
1849
1850 se_nacl = pr_reg->pr_reg_nacl;
1851 se_tpg = se_nacl->se_tpg;
1852 tfo = se_tpg->se_tpg_tfo;
1853
1854 len += sprintf(page+len, "SPC-3 Reservation: %s"
1855 " Target Node Endpoint: %s\n", tfo->fabric_name,
1856 tfo->tpg_get_wwn(se_tpg));
1857 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1858 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1859 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1860 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1861 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1862
1863out_unlock:
1864 spin_unlock(&dev->dev_reservation_lock);
1865 return len;
1866}
1867
1868
1869static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1870 char *page)
1871{
1872 struct se_device *dev = pr_to_dev(item);
1873 const struct target_core_fabric_ops *tfo;
1874 struct t10_pr_registration *pr_reg;
1875 unsigned char buf[384];
1876 char i_buf[PR_REG_ISID_ID_LEN];
1877 ssize_t len = 0;
1878 int reg_count = 0;
1879
1880 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1881
1882 spin_lock(&dev->t10_pr.registration_lock);
1883 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1884 pr_reg_list) {
1885
1886 memset(buf, 0, 384);
1887 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1888 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1889 core_pr_dump_initiator_port(pr_reg, i_buf,
1890 PR_REG_ISID_ID_LEN);
1891 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1892 tfo->fabric_name,
1893 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1894 pr_reg->pr_res_generation);
1895
1896 if (len + strlen(buf) >= PAGE_SIZE)
1897 break;
1898
1899 len += sprintf(page+len, "%s", buf);
1900 reg_count++;
1901 }
1902 spin_unlock(&dev->t10_pr.registration_lock);
1903
1904 if (!reg_count)
1905 len += sprintf(page+len, "None\n");
1906
1907 return len;
1908}
1909
1910static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1911{
1912 struct se_device *dev = pr_to_dev(item);
1913 struct t10_pr_registration *pr_reg;
1914 ssize_t len = 0;
1915
1916 spin_lock(&dev->dev_reservation_lock);
1917 pr_reg = dev->dev_pr_res_holder;
1918 if (pr_reg) {
1919 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1920 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1921 } else {
1922 len = sprintf(page, "No SPC-3 Reservation holder\n");
1923 }
1924
1925 spin_unlock(&dev->dev_reservation_lock);
1926 return len;
1927}
1928
1929static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1930{
1931 struct se_device *dev = pr_to_dev(item);
1932
1933 if (!dev->dev_attrib.emulate_pr)
1934 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1935 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1936 return sprintf(page, "SPC_PASSTHROUGH\n");
1937 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1938 return sprintf(page, "SPC2_RESERVATIONS\n");
1939
1940 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1941}
1942
1943static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1944 char *page)
1945{
1946 struct se_device *dev = pr_to_dev(item);
1947
1948 if (!dev->dev_attrib.emulate_pr ||
1949 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1950 return 0;
1951
1952 return sprintf(page, "APTPL Bit Status: %s\n",
1953 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1954}
1955
1956static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1957 char *page)
1958{
1959 struct se_device *dev = pr_to_dev(item);
1960
1961 if (!dev->dev_attrib.emulate_pr ||
1962 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1963 return 0;
1964
1965 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1966}
1967
1968enum {
1969 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1970 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1971 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1972 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1973};
1974
1975static match_table_t tokens = {
1976 {Opt_initiator_fabric, "initiator_fabric=%s"},
1977 {Opt_initiator_node, "initiator_node=%s"},
1978 {Opt_initiator_sid, "initiator_sid=%s"},
1979 {Opt_sa_res_key, "sa_res_key=%s"},
1980 {Opt_res_holder, "res_holder=%d"},
1981 {Opt_res_type, "res_type=%d"},
1982 {Opt_res_scope, "res_scope=%d"},
1983 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1984 {Opt_mapped_lun, "mapped_lun=%u"},
1985 {Opt_target_fabric, "target_fabric=%s"},
1986 {Opt_target_node, "target_node=%s"},
1987 {Opt_tpgt, "tpgt=%d"},
1988 {Opt_port_rtpi, "port_rtpi=%d"},
1989 {Opt_target_lun, "target_lun=%u"},
1990 {Opt_err, NULL}
1991};
1992
1993static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1994 const char *page, size_t count)
1995{
1996 struct se_device *dev = pr_to_dev(item);
1997 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1998 unsigned char *t_fabric = NULL, *t_port = NULL;
1999 char *orig, *ptr, *opts;
2000 substring_t args[MAX_OPT_ARGS];
2001 unsigned long long tmp_ll;
2002 u64 sa_res_key = 0;
2003 u64 mapped_lun = 0, target_lun = 0;
2004 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
2005 u16 tpgt = 0;
2006 u8 type = 0;
2007
2008 if (!dev->dev_attrib.emulate_pr ||
2009 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
2010 return count;
2011 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
2012 return count;
2013
2014 if (dev->export_count) {
2015 pr_debug("Unable to process APTPL metadata while"
2016 " active fabric exports exist\n");
2017 return -EINVAL;
2018 }
2019
2020 opts = kstrdup(page, GFP_KERNEL);
2021 if (!opts)
2022 return -ENOMEM;
2023
2024 orig = opts;
2025 while ((ptr = strsep(&opts, ",\n")) != NULL) {
2026 if (!*ptr)
2027 continue;
2028
2029 token = match_token(ptr, tokens, args);
2030 switch (token) {
2031 case Opt_initiator_fabric:
2032 i_fabric = match_strdup(args);
2033 if (!i_fabric) {
2034 ret = -ENOMEM;
2035 goto out;
2036 }
2037 break;
2038 case Opt_initiator_node:
2039 i_port = match_strdup(args);
2040 if (!i_port) {
2041 ret = -ENOMEM;
2042 goto out;
2043 }
2044 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2045 pr_err("APTPL metadata initiator_node="
2046 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2047 PR_APTPL_MAX_IPORT_LEN);
2048 ret = -EINVAL;
2049 break;
2050 }
2051 break;
2052 case Opt_initiator_sid:
2053 isid = match_strdup(args);
2054 if (!isid) {
2055 ret = -ENOMEM;
2056 goto out;
2057 }
2058 if (strlen(isid) >= PR_REG_ISID_LEN) {
2059 pr_err("APTPL metadata initiator_isid"
2060 "= exceeds PR_REG_ISID_LEN: %d\n",
2061 PR_REG_ISID_LEN);
2062 ret = -EINVAL;
2063 break;
2064 }
2065 break;
2066 case Opt_sa_res_key:
2067 ret = match_u64(args, &tmp_ll);
2068 if (ret < 0) {
2069 pr_err("kstrtoull() failed for sa_res_key=\n");
2070 goto out;
2071 }
2072 sa_res_key = (u64)tmp_ll;
2073 break;
2074 /*
2075 * PR APTPL Metadata for Reservation
2076 */
2077 case Opt_res_holder:
2078 ret = match_int(args, &arg);
2079 if (ret)
2080 goto out;
2081 res_holder = arg;
2082 break;
2083 case Opt_res_type:
2084 ret = match_int(args, &arg);
2085 if (ret)
2086 goto out;
2087 type = (u8)arg;
2088 break;
2089 case Opt_res_scope:
2090 ret = match_int(args, &arg);
2091 if (ret)
2092 goto out;
2093 break;
2094 case Opt_res_all_tg_pt:
2095 ret = match_int(args, &arg);
2096 if (ret)
2097 goto out;
2098 all_tg_pt = (int)arg;
2099 break;
2100 case Opt_mapped_lun:
2101 ret = match_u64(args, &tmp_ll);
2102 if (ret)
2103 goto out;
2104 mapped_lun = (u64)tmp_ll;
2105 break;
2106 /*
2107 * PR APTPL Metadata for Target Port
2108 */
2109 case Opt_target_fabric:
2110 t_fabric = match_strdup(args);
2111 if (!t_fabric) {
2112 ret = -ENOMEM;
2113 goto out;
2114 }
2115 break;
2116 case Opt_target_node:
2117 t_port = match_strdup(args);
2118 if (!t_port) {
2119 ret = -ENOMEM;
2120 goto out;
2121 }
2122 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2123 pr_err("APTPL metadata target_node="
2124 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2125 PR_APTPL_MAX_TPORT_LEN);
2126 ret = -EINVAL;
2127 break;
2128 }
2129 break;
2130 case Opt_tpgt:
2131 ret = match_int(args, &arg);
2132 if (ret)
2133 goto out;
2134 tpgt = (u16)arg;
2135 break;
2136 case Opt_port_rtpi:
2137 ret = match_int(args, &arg);
2138 if (ret)
2139 goto out;
2140 break;
2141 case Opt_target_lun:
2142 ret = match_u64(args, &tmp_ll);
2143 if (ret)
2144 goto out;
2145 target_lun = (u64)tmp_ll;
2146 break;
2147 default:
2148 break;
2149 }
2150 }
2151
2152 if (!i_port || !t_port || !sa_res_key) {
2153 pr_err("Illegal parameters for APTPL registration\n");
2154 ret = -EINVAL;
2155 goto out;
2156 }
2157
2158 if (res_holder && !(type)) {
2159 pr_err("Illegal PR type: 0x%02x for reservation"
2160 " holder\n", type);
2161 ret = -EINVAL;
2162 goto out;
2163 }
2164
2165 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2166 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2167 res_holder, all_tg_pt, type);
2168out:
2169 kfree(i_fabric);
2170 kfree(i_port);
2171 kfree(isid);
2172 kfree(t_fabric);
2173 kfree(t_port);
2174 kfree(orig);
2175 return (ret == 0) ? count : ret;
2176}
2177
2178
2179CONFIGFS_ATTR_RO(target_pr_, res_holder);
2180CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2181CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2182CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2183CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2184CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2185CONFIGFS_ATTR_RO(target_pr_, res_type);
2186CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2187CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2188
2189static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2190 &target_pr_attr_res_holder,
2191 &target_pr_attr_res_pr_all_tgt_pts,
2192 &target_pr_attr_res_pr_generation,
2193 &target_pr_attr_res_pr_holder_tg_port,
2194 &target_pr_attr_res_pr_registered_i_pts,
2195 &target_pr_attr_res_pr_type,
2196 &target_pr_attr_res_type,
2197 &target_pr_attr_res_aptpl_active,
2198 &target_pr_attr_res_aptpl_metadata,
2199 NULL,
2200};
2201
2202TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2203
2204/* End functions for struct config_item_type tb_dev_pr_cit */
2205
2206/* Start functions for struct config_item_type tb_dev_cit */
2207
2208static inline struct se_device *to_device(struct config_item *item)
2209{
2210 return container_of(to_config_group(item), struct se_device, dev_group);
2211}
2212
2213static ssize_t target_dev_info_show(struct config_item *item, char *page)
2214{
2215 struct se_device *dev = to_device(item);
2216 int bl = 0;
2217 ssize_t read_bytes = 0;
2218
2219 transport_dump_dev_state(dev, page, &bl);
2220 read_bytes += bl;
2221 read_bytes += dev->transport->show_configfs_dev_params(dev,
2222 page+read_bytes);
2223 return read_bytes;
2224}
2225
2226static ssize_t target_dev_control_store(struct config_item *item,
2227 const char *page, size_t count)
2228{
2229 struct se_device *dev = to_device(item);
2230
2231 return dev->transport->set_configfs_dev_params(dev, page, count);
2232}
2233
2234static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2235{
2236 struct se_device *dev = to_device(item);
2237
2238 if (!(dev->dev_flags & DF_USING_ALIAS))
2239 return 0;
2240
2241 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2242}
2243
2244static ssize_t target_dev_alias_store(struct config_item *item,
2245 const char *page, size_t count)
2246{
2247 struct se_device *dev = to_device(item);
2248 struct se_hba *hba = dev->se_hba;
2249 ssize_t read_bytes;
2250
2251 if (count > (SE_DEV_ALIAS_LEN-1)) {
2252 pr_err("alias count: %d exceeds"
2253 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2254 SE_DEV_ALIAS_LEN-1);
2255 return -EINVAL;
2256 }
2257
2258 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2259 if (!read_bytes)
2260 return -EINVAL;
2261 if (dev->dev_alias[read_bytes - 1] == '\n')
2262 dev->dev_alias[read_bytes - 1] = '\0';
2263
2264 dev->dev_flags |= DF_USING_ALIAS;
2265
2266 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2267 config_item_name(&hba->hba_group.cg_item),
2268 config_item_name(&dev->dev_group.cg_item),
2269 dev->dev_alias);
2270
2271 return read_bytes;
2272}
2273
2274static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2275{
2276 struct se_device *dev = to_device(item);
2277
2278 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2279 return 0;
2280
2281 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2282}
2283
2284static ssize_t target_dev_udev_path_store(struct config_item *item,
2285 const char *page, size_t count)
2286{
2287 struct se_device *dev = to_device(item);
2288 struct se_hba *hba = dev->se_hba;
2289 ssize_t read_bytes;
2290
2291 if (count > (SE_UDEV_PATH_LEN-1)) {
2292 pr_err("udev_path count: %d exceeds"
2293 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2294 SE_UDEV_PATH_LEN-1);
2295 return -EINVAL;
2296 }
2297
2298 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2299 "%s", page);
2300 if (!read_bytes)
2301 return -EINVAL;
2302 if (dev->udev_path[read_bytes - 1] == '\n')
2303 dev->udev_path[read_bytes - 1] = '\0';
2304
2305 dev->dev_flags |= DF_USING_UDEV_PATH;
2306
2307 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2308 config_item_name(&hba->hba_group.cg_item),
2309 config_item_name(&dev->dev_group.cg_item),
2310 dev->udev_path);
2311
2312 return read_bytes;
2313}
2314
2315static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2316{
2317 struct se_device *dev = to_device(item);
2318
2319 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2320}
2321
2322static ssize_t target_dev_enable_store(struct config_item *item,
2323 const char *page, size_t count)
2324{
2325 struct se_device *dev = to_device(item);
2326 char *ptr;
2327 int ret;
2328
2329 ptr = strstr(page, "1");
2330 if (!ptr) {
2331 pr_err("For dev_enable ops, only valid value"
2332 " is \"1\"\n");
2333 return -EINVAL;
2334 }
2335
2336 ret = target_configure_device(dev);
2337 if (ret)
2338 return ret;
2339 return count;
2340}
2341
2342static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2343{
2344 struct se_device *dev = to_device(item);
2345 struct config_item *lu_ci;
2346 struct t10_alua_lu_gp *lu_gp;
2347 struct t10_alua_lu_gp_member *lu_gp_mem;
2348 ssize_t len = 0;
2349
2350 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2351 if (!lu_gp_mem)
2352 return 0;
2353
2354 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2355 lu_gp = lu_gp_mem->lu_gp;
2356 if (lu_gp) {
2357 lu_ci = &lu_gp->lu_gp_group.cg_item;
2358 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2359 config_item_name(lu_ci), lu_gp->lu_gp_id);
2360 }
2361 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2362
2363 return len;
2364}
2365
2366static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2367 const char *page, size_t count)
2368{
2369 struct se_device *dev = to_device(item);
2370 struct se_hba *hba = dev->se_hba;
2371 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2372 struct t10_alua_lu_gp_member *lu_gp_mem;
2373 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2374 int move = 0;
2375
2376 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2377 if (!lu_gp_mem)
2378 return count;
2379
2380 if (count > LU_GROUP_NAME_BUF) {
2381 pr_err("ALUA LU Group Alias too large!\n");
2382 return -EINVAL;
2383 }
2384 memcpy(buf, page, count);
2385 /*
2386 * Any ALUA logical unit alias besides "NULL" means we will be
2387 * making a new group association.
2388 */
2389 if (strcmp(strstrip(buf), "NULL")) {
2390 /*
2391 * core_alua_get_lu_gp_by_name() will increment reference to
2392 * struct t10_alua_lu_gp. This reference is released with
2393 * core_alua_get_lu_gp_by_name below().
2394 */
2395 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2396 if (!lu_gp_new)
2397 return -ENODEV;
2398 }
2399
2400 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2401 lu_gp = lu_gp_mem->lu_gp;
2402 if (lu_gp) {
2403 /*
2404 * Clearing an existing lu_gp association, and replacing
2405 * with NULL
2406 */
2407 if (!lu_gp_new) {
2408 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2409 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2410 " %hu\n",
2411 config_item_name(&hba->hba_group.cg_item),
2412 config_item_name(&dev->dev_group.cg_item),
2413 config_item_name(&lu_gp->lu_gp_group.cg_item),
2414 lu_gp->lu_gp_id);
2415
2416 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2417 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2418
2419 return count;
2420 }
2421 /*
2422 * Removing existing association of lu_gp_mem with lu_gp
2423 */
2424 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2425 move = 1;
2426 }
2427 /*
2428 * Associate lu_gp_mem with lu_gp_new.
2429 */
2430 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2431 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2432
2433 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2434 " core/alua/lu_gps/%s, ID: %hu\n",
2435 (move) ? "Moving" : "Adding",
2436 config_item_name(&hba->hba_group.cg_item),
2437 config_item_name(&dev->dev_group.cg_item),
2438 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2439 lu_gp_new->lu_gp_id);
2440
2441 core_alua_put_lu_gp_from_name(lu_gp_new);
2442 return count;
2443}
2444
2445static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2446{
2447 struct se_device *dev = to_device(item);
2448 struct t10_alua_lba_map *map;
2449 struct t10_alua_lba_map_member *mem;
2450 char *b = page;
2451 int bl = 0;
2452 char state;
2453
2454 spin_lock(&dev->t10_alua.lba_map_lock);
2455 if (!list_empty(&dev->t10_alua.lba_map_list))
2456 bl += sprintf(b + bl, "%u %u\n",
2457 dev->t10_alua.lba_map_segment_size,
2458 dev->t10_alua.lba_map_segment_multiplier);
2459 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2460 bl += sprintf(b + bl, "%llu %llu",
2461 map->lba_map_first_lba, map->lba_map_last_lba);
2462 list_for_each_entry(mem, &map->lba_map_mem_list,
2463 lba_map_mem_list) {
2464 switch (mem->lba_map_mem_alua_state) {
2465 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2466 state = 'O';
2467 break;
2468 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2469 state = 'A';
2470 break;
2471 case ALUA_ACCESS_STATE_STANDBY:
2472 state = 'S';
2473 break;
2474 case ALUA_ACCESS_STATE_UNAVAILABLE:
2475 state = 'U';
2476 break;
2477 default:
2478 state = '.';
2479 break;
2480 }
2481 bl += sprintf(b + bl, " %d:%c",
2482 mem->lba_map_mem_alua_pg_id, state);
2483 }
2484 bl += sprintf(b + bl, "\n");
2485 }
2486 spin_unlock(&dev->t10_alua.lba_map_lock);
2487 return bl;
2488}
2489
2490static ssize_t target_dev_lba_map_store(struct config_item *item,
2491 const char *page, size_t count)
2492{
2493 struct se_device *dev = to_device(item);
2494 struct t10_alua_lba_map *lba_map = NULL;
2495 struct list_head lba_list;
2496 char *map_entries, *orig, *ptr;
2497 char state;
2498 int pg_num = -1, pg;
2499 int ret = 0, num = 0, pg_id, alua_state;
2500 unsigned long start_lba = -1, end_lba = -1;
2501 unsigned long segment_size = -1, segment_mult = -1;
2502
2503 orig = map_entries = kstrdup(page, GFP_KERNEL);
2504 if (!map_entries)
2505 return -ENOMEM;
2506
2507 INIT_LIST_HEAD(&lba_list);
2508 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2509 if (!*ptr)
2510 continue;
2511
2512 if (num == 0) {
2513 if (sscanf(ptr, "%lu %lu\n",
2514 &segment_size, &segment_mult) != 2) {
2515 pr_err("Invalid line %d\n", num);
2516 ret = -EINVAL;
2517 break;
2518 }
2519 num++;
2520 continue;
2521 }
2522 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2523 pr_err("Invalid line %d\n", num);
2524 ret = -EINVAL;
2525 break;
2526 }
2527 ptr = strchr(ptr, ' ');
2528 if (!ptr) {
2529 pr_err("Invalid line %d, missing end lba\n", num);
2530 ret = -EINVAL;
2531 break;
2532 }
2533 ptr++;
2534 ptr = strchr(ptr, ' ');
2535 if (!ptr) {
2536 pr_err("Invalid line %d, missing state definitions\n",
2537 num);
2538 ret = -EINVAL;
2539 break;
2540 }
2541 ptr++;
2542 lba_map = core_alua_allocate_lba_map(&lba_list,
2543 start_lba, end_lba);
2544 if (IS_ERR(lba_map)) {
2545 ret = PTR_ERR(lba_map);
2546 break;
2547 }
2548 pg = 0;
2549 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2550 switch (state) {
2551 case 'O':
2552 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2553 break;
2554 case 'A':
2555 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2556 break;
2557 case 'S':
2558 alua_state = ALUA_ACCESS_STATE_STANDBY;
2559 break;
2560 case 'U':
2561 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2562 break;
2563 default:
2564 pr_err("Invalid ALUA state '%c'\n", state);
2565 ret = -EINVAL;
2566 goto out;
2567 }
2568
2569 ret = core_alua_allocate_lba_map_mem(lba_map,
2570 pg_id, alua_state);
2571 if (ret) {
2572 pr_err("Invalid target descriptor %d:%c "
2573 "at line %d\n",
2574 pg_id, state, num);
2575 break;
2576 }
2577 pg++;
2578 ptr = strchr(ptr, ' ');
2579 if (ptr)
2580 ptr++;
2581 else
2582 break;
2583 }
2584 if (pg_num == -1)
2585 pg_num = pg;
2586 else if (pg != pg_num) {
2587 pr_err("Only %d from %d port groups definitions "
2588 "at line %d\n", pg, pg_num, num);
2589 ret = -EINVAL;
2590 break;
2591 }
2592 num++;
2593 }
2594out:
2595 if (ret) {
2596 core_alua_free_lba_map(&lba_list);
2597 count = ret;
2598 } else
2599 core_alua_set_lba_map(dev, &lba_list,
2600 segment_size, segment_mult);
2601 kfree(orig);
2602 return count;
2603}
2604
2605CONFIGFS_ATTR_RO(target_dev_, info);
2606CONFIGFS_ATTR_WO(target_dev_, control);
2607CONFIGFS_ATTR(target_dev_, alias);
2608CONFIGFS_ATTR(target_dev_, udev_path);
2609CONFIGFS_ATTR(target_dev_, enable);
2610CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2611CONFIGFS_ATTR(target_dev_, lba_map);
2612
2613static struct configfs_attribute *target_core_dev_attrs[] = {
2614 &target_dev_attr_info,
2615 &target_dev_attr_control,
2616 &target_dev_attr_alias,
2617 &target_dev_attr_udev_path,
2618 &target_dev_attr_enable,
2619 &target_dev_attr_alua_lu_gp,
2620 &target_dev_attr_lba_map,
2621 NULL,
2622};
2623
2624static void target_core_dev_release(struct config_item *item)
2625{
2626 struct config_group *dev_cg = to_config_group(item);
2627 struct se_device *dev =
2628 container_of(dev_cg, struct se_device, dev_group);
2629
2630 target_free_device(dev);
2631}
2632
2633/*
2634 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2635 * within target_fabric_port_link()
2636 */
2637struct configfs_item_operations target_core_dev_item_ops = {
2638 .release = target_core_dev_release,
2639};
2640
2641TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2642
2643/* End functions for struct config_item_type tb_dev_cit */
2644
2645/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2646
2647static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2648{
2649 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2650 lu_gp_group);
2651}
2652
2653static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2654{
2655 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2656
2657 if (!lu_gp->lu_gp_valid_id)
2658 return 0;
2659 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2660}
2661
2662static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2663 const char *page, size_t count)
2664{
2665 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2666 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2667 unsigned long lu_gp_id;
2668 int ret;
2669
2670 ret = kstrtoul(page, 0, &lu_gp_id);
2671 if (ret < 0) {
2672 pr_err("kstrtoul() returned %d for"
2673 " lu_gp_id\n", ret);
2674 return ret;
2675 }
2676 if (lu_gp_id > 0x0000ffff) {
2677 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2678 " 0x0000ffff\n", lu_gp_id);
2679 return -EINVAL;
2680 }
2681
2682 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2683 if (ret < 0)
2684 return -EINVAL;
2685
2686 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2687 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2688 config_item_name(&alua_lu_gp_cg->cg_item),
2689 lu_gp->lu_gp_id);
2690
2691 return count;
2692}
2693
2694static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2695{
2696 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2697 struct se_device *dev;
2698 struct se_hba *hba;
2699 struct t10_alua_lu_gp_member *lu_gp_mem;
2700 ssize_t len = 0, cur_len;
2701 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2702
2703 spin_lock(&lu_gp->lu_gp_lock);
2704 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2705 dev = lu_gp_mem->lu_gp_mem_dev;
2706 hba = dev->se_hba;
2707
2708 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2709 config_item_name(&hba->hba_group.cg_item),
2710 config_item_name(&dev->dev_group.cg_item));
2711 cur_len++; /* Extra byte for NULL terminator */
2712
2713 if ((cur_len + len) > PAGE_SIZE) {
2714 pr_warn("Ran out of lu_gp_show_attr"
2715 "_members buffer\n");
2716 break;
2717 }
2718 memcpy(page+len, buf, cur_len);
2719 len += cur_len;
2720 }
2721 spin_unlock(&lu_gp->lu_gp_lock);
2722
2723 return len;
2724}
2725
2726CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2727CONFIGFS_ATTR_RO(target_lu_gp_, members);
2728
2729static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2730 &target_lu_gp_attr_lu_gp_id,
2731 &target_lu_gp_attr_members,
2732 NULL,
2733};
2734
2735static void target_core_alua_lu_gp_release(struct config_item *item)
2736{
2737 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2738 struct t10_alua_lu_gp, lu_gp_group);
2739
2740 core_alua_free_lu_gp(lu_gp);
2741}
2742
2743static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2744 .release = target_core_alua_lu_gp_release,
2745};
2746
2747static const struct config_item_type target_core_alua_lu_gp_cit = {
2748 .ct_item_ops = &target_core_alua_lu_gp_ops,
2749 .ct_attrs = target_core_alua_lu_gp_attrs,
2750 .ct_owner = THIS_MODULE,
2751};
2752
2753/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2754
2755/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2756
2757static struct config_group *target_core_alua_create_lu_gp(
2758 struct config_group *group,
2759 const char *name)
2760{
2761 struct t10_alua_lu_gp *lu_gp;
2762 struct config_group *alua_lu_gp_cg = NULL;
2763 struct config_item *alua_lu_gp_ci = NULL;
2764
2765 lu_gp = core_alua_allocate_lu_gp(name, 0);
2766 if (IS_ERR(lu_gp))
2767 return NULL;
2768
2769 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2770 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2771
2772 config_group_init_type_name(alua_lu_gp_cg, name,
2773 &target_core_alua_lu_gp_cit);
2774
2775 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2776 " Group: core/alua/lu_gps/%s\n",
2777 config_item_name(alua_lu_gp_ci));
2778
2779 return alua_lu_gp_cg;
2780
2781}
2782
2783static void target_core_alua_drop_lu_gp(
2784 struct config_group *group,
2785 struct config_item *item)
2786{
2787 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2788 struct t10_alua_lu_gp, lu_gp_group);
2789
2790 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2791 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2792 config_item_name(item), lu_gp->lu_gp_id);
2793 /*
2794 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2795 * -> target_core_alua_lu_gp_release()
2796 */
2797 config_item_put(item);
2798}
2799
2800static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2801 .make_group = &target_core_alua_create_lu_gp,
2802 .drop_item = &target_core_alua_drop_lu_gp,
2803};
2804
2805static const struct config_item_type target_core_alua_lu_gps_cit = {
2806 .ct_item_ops = NULL,
2807 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2808 .ct_owner = THIS_MODULE,
2809};
2810
2811/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2812
2813/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2814
2815static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2816{
2817 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2818 tg_pt_gp_group);
2819}
2820
2821static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2822 char *page)
2823{
2824 return sprintf(page, "%d\n",
2825 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2826}
2827
2828static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2829 const char *page, size_t count)
2830{
2831 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2832 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2833 unsigned long tmp;
2834 int new_state, ret;
2835
2836 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2837 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2838 return -EINVAL;
2839 }
2840 if (!target_dev_configured(dev)) {
2841 pr_err("Unable to set alua_access_state while device is"
2842 " not configured\n");
2843 return -ENODEV;
2844 }
2845
2846 ret = kstrtoul(page, 0, &tmp);
2847 if (ret < 0) {
2848 pr_err("Unable to extract new ALUA access state from"
2849 " %s\n", page);
2850 return ret;
2851 }
2852 new_state = (int)tmp;
2853
2854 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2855 pr_err("Unable to process implicit configfs ALUA"
2856 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2857 return -EINVAL;
2858 }
2859 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2860 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2861 /* LBA DEPENDENT is only allowed with implicit ALUA */
2862 pr_err("Unable to process implicit configfs ALUA transition"
2863 " while explicit ALUA management is enabled\n");
2864 return -EINVAL;
2865 }
2866
2867 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2868 NULL, NULL, new_state, 0);
2869 return (!ret) ? count : -EINVAL;
2870}
2871
2872static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2873 char *page)
2874{
2875 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2876 return sprintf(page, "%s\n",
2877 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2878}
2879
2880static ssize_t target_tg_pt_gp_alua_access_status_store(
2881 struct config_item *item, const char *page, size_t count)
2882{
2883 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2884 unsigned long tmp;
2885 int new_status, ret;
2886
2887 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2888 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2889 return -EINVAL;
2890 }
2891
2892 ret = kstrtoul(page, 0, &tmp);
2893 if (ret < 0) {
2894 pr_err("Unable to extract new ALUA access status"
2895 " from %s\n", page);
2896 return ret;
2897 }
2898 new_status = (int)tmp;
2899
2900 if ((new_status != ALUA_STATUS_NONE) &&
2901 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2902 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2903 pr_err("Illegal ALUA access status: 0x%02x\n",
2904 new_status);
2905 return -EINVAL;
2906 }
2907
2908 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2909 return count;
2910}
2911
2912static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2913 char *page)
2914{
2915 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2916}
2917
2918static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2919 const char *page, size_t count)
2920{
2921 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2922}
2923
2924#define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2925static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2926 struct config_item *item, char *p) \
2927{ \
2928 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2929 return sprintf(p, "%d\n", \
2930 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2931} \
2932 \
2933static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2934 struct config_item *item, const char *p, size_t c) \
2935{ \
2936 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2937 unsigned long tmp; \
2938 int ret; \
2939 \
2940 if (!t->tg_pt_gp_valid_id) { \
2941 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2942 return -EINVAL; \
2943 } \
2944 \
2945 ret = kstrtoul(p, 0, &tmp); \
2946 if (ret < 0) { \
2947 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2948 return -EINVAL; \
2949 } \
2950 if (tmp > 1) { \
2951 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2952 return -EINVAL; \
2953 } \
2954 if (tmp) \
2955 t->tg_pt_gp_alua_supported_states |= _bit; \
2956 else \
2957 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2958 \
2959 return c; \
2960}
2961
2962ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2963ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2964ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2965ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2966ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2967ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2968ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2969
2970static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2971 struct config_item *item, char *page)
2972{
2973 return sprintf(page, "%d\n",
2974 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2975}
2976
2977static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2978 struct config_item *item, const char *page, size_t count)
2979{
2980 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2981 unsigned long tmp;
2982 int ret;
2983
2984 ret = kstrtoul(page, 0, &tmp);
2985 if (ret < 0) {
2986 pr_err("Unable to extract alua_write_metadata\n");
2987 return ret;
2988 }
2989
2990 if ((tmp != 0) && (tmp != 1)) {
2991 pr_err("Illegal value for alua_write_metadata:"
2992 " %lu\n", tmp);
2993 return -EINVAL;
2994 }
2995 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2996
2997 return count;
2998}
2999
3000static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
3001 char *page)
3002{
3003 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
3004}
3005
3006static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
3007 const char *page, size_t count)
3008{
3009 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
3010 count);
3011}
3012
3013static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
3014 char *page)
3015{
3016 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
3017}
3018
3019static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
3020 const char *page, size_t count)
3021{
3022 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
3023 count);
3024}
3025
3026static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
3027 struct config_item *item, char *page)
3028{
3029 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
3030}
3031
3032static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
3033 struct config_item *item, const char *page, size_t count)
3034{
3035 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
3036 count);
3037}
3038
3039static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3040 char *page)
3041{
3042 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3043}
3044
3045static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3046 const char *page, size_t count)
3047{
3048 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3049}
3050
3051static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3052 char *page)
3053{
3054 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3055
3056 if (!tg_pt_gp->tg_pt_gp_valid_id)
3057 return 0;
3058 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3059}
3060
3061static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3062 const char *page, size_t count)
3063{
3064 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3065 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3066 unsigned long tg_pt_gp_id;
3067 int ret;
3068
3069 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3070 if (ret < 0) {
3071 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3072 page);
3073 return ret;
3074 }
3075 if (tg_pt_gp_id > 0x0000ffff) {
3076 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3077 tg_pt_gp_id);
3078 return -EINVAL;
3079 }
3080
3081 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3082 if (ret < 0)
3083 return -EINVAL;
3084
3085 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3086 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3087 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3088 tg_pt_gp->tg_pt_gp_id);
3089
3090 return count;
3091}
3092
3093static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3094 char *page)
3095{
3096 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3097 struct se_lun *lun;
3098 ssize_t len = 0, cur_len;
3099 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3100
3101 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3102 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3103 lun_tg_pt_gp_link) {
3104 struct se_portal_group *tpg = lun->lun_tpg;
3105
3106 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3107 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3108 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3109 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3110 config_item_name(&lun->lun_group.cg_item));
3111 cur_len++; /* Extra byte for NULL terminator */
3112
3113 if ((cur_len + len) > PAGE_SIZE) {
3114 pr_warn("Ran out of lu_gp_show_attr"
3115 "_members buffer\n");
3116 break;
3117 }
3118 memcpy(page+len, buf, cur_len);
3119 len += cur_len;
3120 }
3121 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3122
3123 return len;
3124}
3125
3126CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3127CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3128CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3129CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3130CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3131CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3132CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3133CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3134CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3135CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3136CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3137CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3138CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3139CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3140CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3141CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3142CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3143
3144static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3145 &target_tg_pt_gp_attr_alua_access_state,
3146 &target_tg_pt_gp_attr_alua_access_status,
3147 &target_tg_pt_gp_attr_alua_access_type,
3148 &target_tg_pt_gp_attr_alua_support_transitioning,
3149 &target_tg_pt_gp_attr_alua_support_offline,
3150 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3151 &target_tg_pt_gp_attr_alua_support_unavailable,
3152 &target_tg_pt_gp_attr_alua_support_standby,
3153 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3154 &target_tg_pt_gp_attr_alua_support_active_optimized,
3155 &target_tg_pt_gp_attr_alua_write_metadata,
3156 &target_tg_pt_gp_attr_nonop_delay_msecs,
3157 &target_tg_pt_gp_attr_trans_delay_msecs,
3158 &target_tg_pt_gp_attr_implicit_trans_secs,
3159 &target_tg_pt_gp_attr_preferred,
3160 &target_tg_pt_gp_attr_tg_pt_gp_id,
3161 &target_tg_pt_gp_attr_members,
3162 NULL,
3163};
3164
3165static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3166{
3167 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3168 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3169
3170 core_alua_free_tg_pt_gp(tg_pt_gp);
3171}
3172
3173static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3174 .release = target_core_alua_tg_pt_gp_release,
3175};
3176
3177static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3178 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3179 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3180 .ct_owner = THIS_MODULE,
3181};
3182
3183/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3184
3185/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3186
3187static struct config_group *target_core_alua_create_tg_pt_gp(
3188 struct config_group *group,
3189 const char *name)
3190{
3191 struct t10_alua *alua = container_of(group, struct t10_alua,
3192 alua_tg_pt_gps_group);
3193 struct t10_alua_tg_pt_gp *tg_pt_gp;
3194 struct config_group *alua_tg_pt_gp_cg = NULL;
3195 struct config_item *alua_tg_pt_gp_ci = NULL;
3196
3197 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3198 if (!tg_pt_gp)
3199 return NULL;
3200
3201 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3202 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3203
3204 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3205 &target_core_alua_tg_pt_gp_cit);
3206
3207 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3208 " Group: alua/tg_pt_gps/%s\n",
3209 config_item_name(alua_tg_pt_gp_ci));
3210
3211 return alua_tg_pt_gp_cg;
3212}
3213
3214static void target_core_alua_drop_tg_pt_gp(
3215 struct config_group *group,
3216 struct config_item *item)
3217{
3218 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3219 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3220
3221 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3222 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3223 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3224 /*
3225 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3226 * -> target_core_alua_tg_pt_gp_release().
3227 */
3228 config_item_put(item);
3229}
3230
3231static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3232 .make_group = &target_core_alua_create_tg_pt_gp,
3233 .drop_item = &target_core_alua_drop_tg_pt_gp,
3234};
3235
3236TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3237
3238/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3239
3240/* Start functions for struct config_item_type target_core_alua_cit */
3241
3242/*
3243 * target_core_alua_cit is a ConfigFS group that lives under
3244 * /sys/kernel/config/target/core/alua. There are default groups
3245 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3246 * target_core_alua_cit in target_core_init_configfs() below.
3247 */
3248static const struct config_item_type target_core_alua_cit = {
3249 .ct_item_ops = NULL,
3250 .ct_attrs = NULL,
3251 .ct_owner = THIS_MODULE,
3252};
3253
3254/* End functions for struct config_item_type target_core_alua_cit */
3255
3256/* Start functions for struct config_item_type tb_dev_stat_cit */
3257
3258static struct config_group *target_core_stat_mkdir(
3259 struct config_group *group,
3260 const char *name)
3261{
3262 return ERR_PTR(-ENOSYS);
3263}
3264
3265static void target_core_stat_rmdir(
3266 struct config_group *group,
3267 struct config_item *item)
3268{
3269 return;
3270}
3271
3272static struct configfs_group_operations target_core_stat_group_ops = {
3273 .make_group = &target_core_stat_mkdir,
3274 .drop_item = &target_core_stat_rmdir,
3275};
3276
3277TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3278
3279/* End functions for struct config_item_type tb_dev_stat_cit */
3280
3281/* Start functions for struct config_item_type target_core_hba_cit */
3282
3283static struct config_group *target_core_make_subdev(
3284 struct config_group *group,
3285 const char *name)
3286{
3287 struct t10_alua_tg_pt_gp *tg_pt_gp;
3288 struct config_item *hba_ci = &group->cg_item;
3289 struct se_hba *hba = item_to_hba(hba_ci);
3290 struct target_backend *tb = hba->backend;
3291 struct se_device *dev;
3292 int errno = -ENOMEM, ret;
3293
3294 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3295 if (ret)
3296 return ERR_PTR(ret);
3297
3298 dev = target_alloc_device(hba, name);
3299 if (!dev)
3300 goto out_unlock;
3301
3302 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3303
3304 config_group_init_type_name(&dev->dev_action_group, "action",
3305 &tb->tb_dev_action_cit);
3306 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3307
3308 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3309 &tb->tb_dev_attrib_cit);
3310 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3311
3312 config_group_init_type_name(&dev->dev_pr_group, "pr",
3313 &tb->tb_dev_pr_cit);
3314 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3315
3316 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3317 &tb->tb_dev_wwn_cit);
3318 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3319 &dev->dev_group);
3320
3321 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3322 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3323 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3324 &dev->dev_group);
3325
3326 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3327 "statistics", &tb->tb_dev_stat_cit);
3328 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3329 &dev->dev_group);
3330
3331 /*
3332 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3333 */
3334 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3335 if (!tg_pt_gp)
3336 goto out_free_device;
3337 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3338
3339 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3340 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3341 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3342 &dev->t10_alua.alua_tg_pt_gps_group);
3343
3344 /*
3345 * Add core/$HBA/$DEV/statistics/ default groups
3346 */
3347 target_stat_setup_dev_default_groups(dev);
3348
3349 mutex_lock(&target_devices_lock);
3350 target_devices++;
3351 mutex_unlock(&target_devices_lock);
3352
3353 mutex_unlock(&hba->hba_access_mutex);
3354 return &dev->dev_group;
3355
3356out_free_device:
3357 target_free_device(dev);
3358out_unlock:
3359 mutex_unlock(&hba->hba_access_mutex);
3360 return ERR_PTR(errno);
3361}
3362
3363static void target_core_drop_subdev(
3364 struct config_group *group,
3365 struct config_item *item)
3366{
3367 struct config_group *dev_cg = to_config_group(item);
3368 struct se_device *dev =
3369 container_of(dev_cg, struct se_device, dev_group);
3370 struct se_hba *hba;
3371
3372 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3373
3374 mutex_lock(&hba->hba_access_mutex);
3375
3376 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3377 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3378
3379 /*
3380 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3381 * directly from target_core_alua_tg_pt_gp_release().
3382 */
3383 dev->t10_alua.default_tg_pt_gp = NULL;
3384
3385 configfs_remove_default_groups(dev_cg);
3386
3387 /*
3388 * se_dev is released from target_core_dev_item_ops->release()
3389 */
3390 config_item_put(item);
3391
3392 mutex_lock(&target_devices_lock);
3393 target_devices--;
3394 mutex_unlock(&target_devices_lock);
3395
3396 mutex_unlock(&hba->hba_access_mutex);
3397}
3398
3399static struct configfs_group_operations target_core_hba_group_ops = {
3400 .make_group = target_core_make_subdev,
3401 .drop_item = target_core_drop_subdev,
3402};
3403
3404
3405static inline struct se_hba *to_hba(struct config_item *item)
3406{
3407 return container_of(to_config_group(item), struct se_hba, hba_group);
3408}
3409
3410static ssize_t target_hba_info_show(struct config_item *item, char *page)
3411{
3412 struct se_hba *hba = to_hba(item);
3413
3414 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3415 hba->hba_id, hba->backend->ops->name,
3416 TARGET_CORE_VERSION);
3417}
3418
3419static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3420{
3421 struct se_hba *hba = to_hba(item);
3422 int hba_mode = 0;
3423
3424 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3425 hba_mode = 1;
3426
3427 return sprintf(page, "%d\n", hba_mode);
3428}
3429
3430static ssize_t target_hba_mode_store(struct config_item *item,
3431 const char *page, size_t count)
3432{
3433 struct se_hba *hba = to_hba(item);
3434 unsigned long mode_flag;
3435 int ret;
3436
3437 if (hba->backend->ops->pmode_enable_hba == NULL)
3438 return -EINVAL;
3439
3440 ret = kstrtoul(page, 0, &mode_flag);
3441 if (ret < 0) {
3442 pr_err("Unable to extract hba mode flag: %d\n", ret);
3443 return ret;
3444 }
3445
3446 if (hba->dev_count) {
3447 pr_err("Unable to set hba_mode with active devices\n");
3448 return -EINVAL;
3449 }
3450
3451 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3452 if (ret < 0)
3453 return -EINVAL;
3454 if (ret > 0)
3455 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3456 else if (ret == 0)
3457 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3458
3459 return count;
3460}
3461
3462CONFIGFS_ATTR_RO(target_, hba_info);
3463CONFIGFS_ATTR(target_, hba_mode);
3464
3465static void target_core_hba_release(struct config_item *item)
3466{
3467 struct se_hba *hba = container_of(to_config_group(item),
3468 struct se_hba, hba_group);
3469 core_delete_hba(hba);
3470}
3471
3472static struct configfs_attribute *target_core_hba_attrs[] = {
3473 &target_attr_hba_info,
3474 &target_attr_hba_mode,
3475 NULL,
3476};
3477
3478static struct configfs_item_operations target_core_hba_item_ops = {
3479 .release = target_core_hba_release,
3480};
3481
3482static const struct config_item_type target_core_hba_cit = {
3483 .ct_item_ops = &target_core_hba_item_ops,
3484 .ct_group_ops = &target_core_hba_group_ops,
3485 .ct_attrs = target_core_hba_attrs,
3486 .ct_owner = THIS_MODULE,
3487};
3488
3489static struct config_group *target_core_call_addhbatotarget(
3490 struct config_group *group,
3491 const char *name)
3492{
3493 char *se_plugin_str, *str, *str2;
3494 struct se_hba *hba;
3495 char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3496 unsigned long plugin_dep_id = 0;
3497 int ret;
3498
3499 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3500 pr_err("Passed *name strlen(): %d exceeds"
3501 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3502 TARGET_CORE_NAME_MAX_LEN);
3503 return ERR_PTR(-ENAMETOOLONG);
3504 }
3505 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3506
3507 str = strstr(buf, "_");
3508 if (!str) {
3509 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3510 return ERR_PTR(-EINVAL);
3511 }
3512 se_plugin_str = buf;
3513 /*
3514 * Special case for subsystem plugins that have "_" in their names.
3515 * Namely rd_direct and rd_mcp..
3516 */
3517 str2 = strstr(str+1, "_");
3518 if (str2) {
3519 *str2 = '\0'; /* Terminate for *se_plugin_str */
3520 str2++; /* Skip to start of plugin dependent ID */
3521 str = str2;
3522 } else {
3523 *str = '\0'; /* Terminate for *se_plugin_str */
3524 str++; /* Skip to start of plugin dependent ID */
3525 }
3526
3527 ret = kstrtoul(str, 0, &plugin_dep_id);
3528 if (ret < 0) {
3529 pr_err("kstrtoul() returned %d for"
3530 " plugin_dep_id\n", ret);
3531 return ERR_PTR(ret);
3532 }
3533 /*
3534 * Load up TCM subsystem plugins if they have not already been loaded.
3535 */
3536 transport_subsystem_check_init();
3537
3538 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3539 if (IS_ERR(hba))
3540 return ERR_CAST(hba);
3541
3542 config_group_init_type_name(&hba->hba_group, name,
3543 &target_core_hba_cit);
3544
3545 return &hba->hba_group;
3546}
3547
3548static void target_core_call_delhbafromtarget(
3549 struct config_group *group,
3550 struct config_item *item)
3551{
3552 /*
3553 * core_delete_hba() is called from target_core_hba_item_ops->release()
3554 * -> target_core_hba_release()
3555 */
3556 config_item_put(item);
3557}
3558
3559static struct configfs_group_operations target_core_group_ops = {
3560 .make_group = target_core_call_addhbatotarget,
3561 .drop_item = target_core_call_delhbafromtarget,
3562};
3563
3564static const struct config_item_type target_core_cit = {
3565 .ct_item_ops = NULL,
3566 .ct_group_ops = &target_core_group_ops,
3567 .ct_attrs = NULL,
3568 .ct_owner = THIS_MODULE,
3569};
3570
3571/* Stop functions for struct config_item_type target_core_hba_cit */
3572
3573void target_setup_backend_cits(struct target_backend *tb)
3574{
3575 target_core_setup_dev_cit(tb);
3576 target_core_setup_dev_action_cit(tb);
3577 target_core_setup_dev_attrib_cit(tb);
3578 target_core_setup_dev_pr_cit(tb);
3579 target_core_setup_dev_wwn_cit(tb);
3580 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3581 target_core_setup_dev_stat_cit(tb);
3582}
3583
3584static void target_init_dbroot(void)
3585{
3586 struct file *fp;
3587
3588 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3589 fp = filp_open(db_root_stage, O_RDONLY, 0);
3590 if (IS_ERR(fp)) {
3591 pr_err("db_root: cannot open: %s\n", db_root_stage);
3592 return;
3593 }
3594 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3595 filp_close(fp, NULL);
3596 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3597 return;
3598 }
3599 filp_close(fp, NULL);
3600
3601 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3602 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3603}
3604
3605static int __init target_core_init_configfs(void)
3606{
3607 struct configfs_subsystem *subsys = &target_core_fabrics;
3608 struct t10_alua_lu_gp *lu_gp;
3609 int ret;
3610
3611 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3612 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3613 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3614
3615 config_group_init(&subsys->su_group);
3616 mutex_init(&subsys->su_mutex);
3617
3618 ret = init_se_kmem_caches();
3619 if (ret < 0)
3620 return ret;
3621 /*
3622 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3623 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3624 */
3625 config_group_init_type_name(&target_core_hbagroup, "core",
3626 &target_core_cit);
3627 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3628
3629 /*
3630 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3631 */
3632 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3633 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3634
3635 /*
3636 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3637 * groups under /sys/kernel/config/target/core/alua/
3638 */
3639 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3640 &target_core_alua_lu_gps_cit);
3641 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3642
3643 /*
3644 * Add core/alua/lu_gps/default_lu_gp
3645 */
3646 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3647 if (IS_ERR(lu_gp)) {
3648 ret = -ENOMEM;
3649 goto out_global;
3650 }
3651
3652 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3653 &target_core_alua_lu_gp_cit);
3654 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3655
3656 default_lu_gp = lu_gp;
3657
3658 /*
3659 * Register the target_core_mod subsystem with configfs.
3660 */
3661 ret = configfs_register_subsystem(subsys);
3662 if (ret < 0) {
3663 pr_err("Error %d while registering subsystem %s\n",
3664 ret, subsys->su_group.cg_item.ci_namebuf);
3665 goto out_global;
3666 }
3667 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3668 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3669 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3670 /*
3671 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3672 */
3673 ret = rd_module_init();
3674 if (ret < 0)
3675 goto out;
3676
3677 ret = core_dev_setup_virtual_lun0();
3678 if (ret < 0)
3679 goto out;
3680
3681 ret = target_xcopy_setup_pt();
3682 if (ret < 0)
3683 goto out;
3684
3685 target_init_dbroot();
3686
3687 return 0;
3688
3689out:
3690 configfs_unregister_subsystem(subsys);
3691 core_dev_release_virtual_lun0();
3692 rd_module_exit();
3693out_global:
3694 if (default_lu_gp) {
3695 core_alua_free_lu_gp(default_lu_gp);
3696 default_lu_gp = NULL;
3697 }
3698 release_se_kmem_caches();
3699 return ret;
3700}
3701
3702static void __exit target_core_exit_configfs(void)
3703{
3704 configfs_remove_default_groups(&alua_lu_gps_group);
3705 configfs_remove_default_groups(&alua_group);
3706 configfs_remove_default_groups(&target_core_hbagroup);
3707
3708 /*
3709 * We expect subsys->su_group.default_groups to be released
3710 * by configfs subsystem provider logic..
3711 */
3712 configfs_unregister_subsystem(&target_core_fabrics);
3713
3714 core_alua_free_lu_gp(default_lu_gp);
3715 default_lu_gp = NULL;
3716
3717 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3718 " Infrastructure\n");
3719
3720 core_dev_release_virtual_lun0();
3721 rd_module_exit();
3722 target_xcopy_release_pt();
3723 release_se_kmem_caches();
3724}
3725
3726MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3727MODULE_AUTHOR("nab@Linux-iSCSI.org");
3728MODULE_LICENSE("GPL");
3729
3730module_init(target_core_init_configfs);
3731module_exit(target_core_exit_configfs);
1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2013 Datera, Inc.
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23#include <linux/module.h>
24#include <linux/moduleparam.h>
25#include <generated/utsrelease.h>
26#include <linux/utsname.h>
27#include <linux/init.h>
28#include <linux/fs.h>
29#include <linux/namei.h>
30#include <linux/slab.h>
31#include <linux/types.h>
32#include <linux/delay.h>
33#include <linux/unistd.h>
34#include <linux/string.h>
35#include <linux/parser.h>
36#include <linux/syscalls.h>
37#include <linux/configfs.h>
38#include <linux/spinlock.h>
39
40#include <target/target_core_base.h>
41#include <target/target_core_backend.h>
42#include <target/target_core_fabric.h>
43#include <target/target_core_fabric_configfs.h>
44#include <target/target_core_configfs.h>
45#include <target/configfs_macros.h>
46
47#include "target_core_internal.h"
48#include "target_core_alua.h"
49#include "target_core_pr.h"
50#include "target_core_rd.h"
51#include "target_core_xcopy.h"
52
53extern struct t10_alua_lu_gp *default_lu_gp;
54
55static LIST_HEAD(g_tf_list);
56static DEFINE_MUTEX(g_tf_lock);
57
58struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62};
63
64static struct config_group target_core_hbagroup;
65static struct config_group alua_group;
66static struct config_group alua_lu_gps_group;
67
68static inline struct se_hba *
69item_to_hba(struct config_item *item)
70{
71 return container_of(to_config_group(item), struct se_hba, hba_group);
72}
73
74/*
75 * Attributes for /sys/kernel/config/target/
76 */
77static ssize_t target_core_attr_show(struct config_item *item,
78 struct configfs_attribute *attr,
79 char *page)
80{
81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
83 utsname()->sysname, utsname()->machine);
84}
85
86static struct configfs_item_operations target_core_fabric_item_ops = {
87 .show_attribute = target_core_attr_show,
88};
89
90static struct configfs_attribute target_core_item_attr_version = {
91 .ca_owner = THIS_MODULE,
92 .ca_name = "version",
93 .ca_mode = S_IRUGO,
94};
95
96static struct target_fabric_configfs *target_core_get_fabric(
97 const char *name)
98{
99 struct target_fabric_configfs *tf;
100
101 if (!name)
102 return NULL;
103
104 mutex_lock(&g_tf_lock);
105 list_for_each_entry(tf, &g_tf_list, tf_list) {
106 if (!strcmp(tf->tf_name, name)) {
107 atomic_inc(&tf->tf_access_cnt);
108 mutex_unlock(&g_tf_lock);
109 return tf;
110 }
111 }
112 mutex_unlock(&g_tf_lock);
113
114 return NULL;
115}
116
117/*
118 * Called from struct target_core_group_ops->make_group()
119 */
120static struct config_group *target_core_register_fabric(
121 struct config_group *group,
122 const char *name)
123{
124 struct target_fabric_configfs *tf;
125 int ret;
126
127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
128 " %s\n", group, name);
129 /*
130 * Below are some hardcoded request_module() calls to automatically
131 * local fabric modules when the following is called:
132 *
133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134 *
135 * Note that this does not limit which TCM fabric module can be
136 * registered, but simply provids auto loading logic for modules with
137 * mkdir(2) system calls with known TCM fabric modules.
138 */
139 if (!strncmp(name, "iscsi", 5)) {
140 /*
141 * Automatically load the LIO Target fabric module when the
142 * following is called:
143 *
144 * mkdir -p $CONFIGFS/target/iscsi
145 */
146 ret = request_module("iscsi_target_mod");
147 if (ret < 0) {
148 pr_err("request_module() failed for"
149 " iscsi_target_mod.ko: %d\n", ret);
150 return ERR_PTR(-EINVAL);
151 }
152 } else if (!strncmp(name, "loopback", 8)) {
153 /*
154 * Automatically load the tcm_loop fabric module when the
155 * following is called:
156 *
157 * mkdir -p $CONFIGFS/target/loopback
158 */
159 ret = request_module("tcm_loop");
160 if (ret < 0) {
161 pr_err("request_module() failed for"
162 " tcm_loop.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 }
166
167 tf = target_core_get_fabric(name);
168 if (!tf) {
169 pr_err("target_core_get_fabric() failed for %s\n",
170 name);
171 return ERR_PTR(-EINVAL);
172 }
173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
174 " %s\n", tf->tf_name);
175 /*
176 * On a successful target_core_get_fabric() look, the returned
177 * struct target_fabric_configfs *tf will contain a usage reference.
178 */
179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
180 &tf->tf_cit_tmpl.tfc_wwn_cit);
181
182 tf->tf_group.default_groups = tf->tf_default_groups;
183 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
184 tf->tf_group.default_groups[1] = NULL;
185
186 config_group_init_type_name(&tf->tf_group, name,
187 &tf->tf_cit_tmpl.tfc_wwn_cit);
188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
189 &tf->tf_cit_tmpl.tfc_discovery_cit);
190
191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
192 " %s\n", tf->tf_group.cg_item.ci_name);
193 /*
194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
195 */
196 tf->tf_ops.tf_subsys = tf->tf_subsys;
197 tf->tf_fabric = &tf->tf_group.cg_item;
198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
199 " for %s\n", name);
200
201 return &tf->tf_group;
202}
203
204/*
205 * Called from struct target_core_group_ops->drop_item()
206 */
207static void target_core_deregister_fabric(
208 struct config_group *group,
209 struct config_item *item)
210{
211 struct target_fabric_configfs *tf = container_of(
212 to_config_group(item), struct target_fabric_configfs, tf_group);
213 struct config_group *tf_group;
214 struct config_item *df_item;
215 int i;
216
217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
218 " tf list\n", config_item_name(item));
219
220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
221 " %s\n", tf->tf_name);
222 atomic_dec(&tf->tf_access_cnt);
223
224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
225 " tf->tf_fabric for %s\n", tf->tf_name);
226 tf->tf_fabric = NULL;
227
228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
229 " %s\n", config_item_name(item));
230
231 tf_group = &tf->tf_group;
232 for (i = 0; tf_group->default_groups[i]; i++) {
233 df_item = &tf_group->default_groups[i]->cg_item;
234 tf_group->default_groups[i] = NULL;
235 config_item_put(df_item);
236 }
237 config_item_put(item);
238}
239
240static struct configfs_group_operations target_core_fabric_group_ops = {
241 .make_group = &target_core_register_fabric,
242 .drop_item = &target_core_deregister_fabric,
243};
244
245/*
246 * All item attributes appearing in /sys/kernel/target/ appear here.
247 */
248static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249 &target_core_item_attr_version,
250 NULL,
251};
252
253/*
254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255 */
256static struct config_item_type target_core_fabrics_item = {
257 .ct_item_ops = &target_core_fabric_item_ops,
258 .ct_group_ops = &target_core_fabric_group_ops,
259 .ct_attrs = target_core_fabric_item_attrs,
260 .ct_owner = THIS_MODULE,
261};
262
263static struct configfs_subsystem target_core_fabrics = {
264 .su_group = {
265 .cg_item = {
266 .ci_namebuf = "target",
267 .ci_type = &target_core_fabrics_item,
268 },
269 },
270};
271
272struct configfs_subsystem *target_core_subsystem[] = {
273 &target_core_fabrics,
274 NULL,
275};
276
277/*##############################################################################
278// Start functions called by external Target Fabrics Modules
279//############################################################################*/
280
281/*
282 * First function called by fabric modules to:
283 *
284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285 * 2) Add struct target_fabric_configfs to g_tf_list
286 * 3) Return struct target_fabric_configfs to fabric module to be passed
287 * into target_fabric_configfs_register().
288 */
289struct target_fabric_configfs *target_fabric_configfs_init(
290 struct module *fabric_mod,
291 const char *name)
292{
293 struct target_fabric_configfs *tf;
294
295 if (!(name)) {
296 pr_err("Unable to locate passed fabric name\n");
297 return ERR_PTR(-EINVAL);
298 }
299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
301 "_NAME_SIZE\n", name);
302 return ERR_PTR(-EINVAL);
303 }
304
305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
306 if (!tf)
307 return ERR_PTR(-ENOMEM);
308
309 INIT_LIST_HEAD(&tf->tf_list);
310 atomic_set(&tf->tf_access_cnt, 0);
311 /*
312 * Setup the default generic struct config_item_type's (cits) in
313 * struct target_fabric_configfs->tf_cit_tmpl
314 */
315 tf->tf_module = fabric_mod;
316 target_fabric_setup_cits(tf);
317
318 tf->tf_subsys = target_core_subsystem[0];
319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
320
321 mutex_lock(&g_tf_lock);
322 list_add_tail(&tf->tf_list, &g_tf_list);
323 mutex_unlock(&g_tf_lock);
324
325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
326 ">>>>>>>>>>>>>>\n");
327 pr_debug("Initialized struct target_fabric_configfs: %p for"
328 " %s\n", tf, tf->tf_name);
329 return tf;
330}
331EXPORT_SYMBOL(target_fabric_configfs_init);
332
333/*
334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335 */
336void target_fabric_configfs_free(
337 struct target_fabric_configfs *tf)
338{
339 mutex_lock(&g_tf_lock);
340 list_del(&tf->tf_list);
341 mutex_unlock(&g_tf_lock);
342
343 kfree(tf);
344}
345EXPORT_SYMBOL(target_fabric_configfs_free);
346
347/*
348 * Perform a sanity check of the passed tf->tf_ops before completing
349 * TCM fabric module registration.
350 */
351static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs *tf)
353{
354 struct target_core_fabric_ops *tfo = &tf->tf_ops;
355
356 if (!tfo->get_fabric_name) {
357 pr_err("Missing tfo->get_fabric_name()\n");
358 return -EINVAL;
359 }
360 if (!tfo->get_fabric_proto_ident) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_get_default_depth) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_get_pr_transport_id) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_pr_transport_id_len) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
382 return -EINVAL;
383 }
384 if (!tfo->tpg_check_demo_mode) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
386 return -EINVAL;
387 }
388 if (!tfo->tpg_check_demo_mode_cache) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
390 return -EINVAL;
391 }
392 if (!tfo->tpg_check_demo_mode_write_protect) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
394 return -EINVAL;
395 }
396 if (!tfo->tpg_check_prod_mode_write_protect) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
398 return -EINVAL;
399 }
400 if (!tfo->tpg_alloc_fabric_acl) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
402 return -EINVAL;
403 }
404 if (!tfo->tpg_release_fabric_acl) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
406 return -EINVAL;
407 }
408 if (!tfo->tpg_get_inst_index) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
410 return -EINVAL;
411 }
412 if (!tfo->release_cmd) {
413 pr_err("Missing tfo->release_cmd()\n");
414 return -EINVAL;
415 }
416 if (!tfo->shutdown_session) {
417 pr_err("Missing tfo->shutdown_session()\n");
418 return -EINVAL;
419 }
420 if (!tfo->close_session) {
421 pr_err("Missing tfo->close_session()\n");
422 return -EINVAL;
423 }
424 if (!tfo->sess_get_index) {
425 pr_err("Missing tfo->sess_get_index()\n");
426 return -EINVAL;
427 }
428 if (!tfo->write_pending) {
429 pr_err("Missing tfo->write_pending()\n");
430 return -EINVAL;
431 }
432 if (!tfo->write_pending_status) {
433 pr_err("Missing tfo->write_pending_status()\n");
434 return -EINVAL;
435 }
436 if (!tfo->set_default_node_attributes) {
437 pr_err("Missing tfo->set_default_node_attributes()\n");
438 return -EINVAL;
439 }
440 if (!tfo->get_task_tag) {
441 pr_err("Missing tfo->get_task_tag()\n");
442 return -EINVAL;
443 }
444 if (!tfo->get_cmd_state) {
445 pr_err("Missing tfo->get_cmd_state()\n");
446 return -EINVAL;
447 }
448 if (!tfo->queue_data_in) {
449 pr_err("Missing tfo->queue_data_in()\n");
450 return -EINVAL;
451 }
452 if (!tfo->queue_status) {
453 pr_err("Missing tfo->queue_status()\n");
454 return -EINVAL;
455 }
456 if (!tfo->queue_tm_rsp) {
457 pr_err("Missing tfo->queue_tm_rsp()\n");
458 return -EINVAL;
459 }
460 if (!tfo->aborted_task) {
461 pr_err("Missing tfo->aborted_task()\n");
462 return -EINVAL;
463 }
464 /*
465 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
466 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
467 * target_core_fabric_configfs.c WWN+TPG group context code.
468 */
469 if (!tfo->fabric_make_wwn) {
470 pr_err("Missing tfo->fabric_make_wwn()\n");
471 return -EINVAL;
472 }
473 if (!tfo->fabric_drop_wwn) {
474 pr_err("Missing tfo->fabric_drop_wwn()\n");
475 return -EINVAL;
476 }
477 if (!tfo->fabric_make_tpg) {
478 pr_err("Missing tfo->fabric_make_tpg()\n");
479 return -EINVAL;
480 }
481 if (!tfo->fabric_drop_tpg) {
482 pr_err("Missing tfo->fabric_drop_tpg()\n");
483 return -EINVAL;
484 }
485
486 return 0;
487}
488
489/*
490 * Called 2nd from fabric module with returned parameter of
491 * struct target_fabric_configfs * from target_fabric_configfs_init().
492 *
493 * Upon a successful registration, the new fabric's struct config_item is
494 * return. Also, a pointer to this struct is set in the passed
495 * struct target_fabric_configfs.
496 */
497int target_fabric_configfs_register(
498 struct target_fabric_configfs *tf)
499{
500 int ret;
501
502 if (!tf) {
503 pr_err("Unable to locate target_fabric_configfs"
504 " pointer\n");
505 return -EINVAL;
506 }
507 if (!tf->tf_subsys) {
508 pr_err("Unable to target struct config_subsystem"
509 " pointer\n");
510 return -EINVAL;
511 }
512 ret = target_fabric_tf_ops_check(tf);
513 if (ret < 0)
514 return ret;
515
516 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
517 ">>>>>>>>>>\n");
518 return 0;
519}
520EXPORT_SYMBOL(target_fabric_configfs_register);
521
522void target_fabric_configfs_deregister(
523 struct target_fabric_configfs *tf)
524{
525 struct configfs_subsystem *su;
526
527 if (!tf) {
528 pr_err("Unable to locate passed target_fabric_"
529 "configfs\n");
530 return;
531 }
532 su = tf->tf_subsys;
533 if (!su) {
534 pr_err("Unable to locate passed tf->tf_subsys"
535 " pointer\n");
536 return;
537 }
538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
539 ">>>>>>>>>>>>\n");
540 mutex_lock(&g_tf_lock);
541 if (atomic_read(&tf->tf_access_cnt)) {
542 mutex_unlock(&g_tf_lock);
543 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
544 tf->tf_name);
545 BUG();
546 }
547 list_del(&tf->tf_list);
548 mutex_unlock(&g_tf_lock);
549
550 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
551 " %s\n", tf->tf_name);
552 tf->tf_module = NULL;
553 tf->tf_subsys = NULL;
554 kfree(tf);
555
556 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
557 ">>>>>\n");
558}
559EXPORT_SYMBOL(target_fabric_configfs_deregister);
560
561/*##############################################################################
562// Stop functions called by external Target Fabrics Modules
563//############################################################################*/
564
565/* Start functions for struct config_item_type target_core_dev_attrib_cit */
566
567#define DEF_DEV_ATTRIB_SHOW(_name) \
568static ssize_t target_core_dev_show_attr_##_name( \
569 struct se_dev_attrib *da, \
570 char *page) \
571{ \
572 return snprintf(page, PAGE_SIZE, "%u\n", \
573 (u32)da->da_dev->dev_attrib._name); \
574}
575
576#define DEF_DEV_ATTRIB_STORE(_name) \
577static ssize_t target_core_dev_store_attr_##_name( \
578 struct se_dev_attrib *da, \
579 const char *page, \
580 size_t count) \
581{ \
582 unsigned long val; \
583 int ret; \
584 \
585 ret = kstrtoul(page, 0, &val); \
586 if (ret < 0) { \
587 pr_err("kstrtoul() failed with" \
588 " ret: %d\n", ret); \
589 return -EINVAL; \
590 } \
591 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
592 \
593 return (!ret) ? count : -EINVAL; \
594}
595
596#define DEF_DEV_ATTRIB(_name) \
597DEF_DEV_ATTRIB_SHOW(_name); \
598DEF_DEV_ATTRIB_STORE(_name);
599
600#define DEF_DEV_ATTRIB_RO(_name) \
601DEF_DEV_ATTRIB_SHOW(_name);
602
603CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
604#define SE_DEV_ATTR(_name, _mode) \
605static struct target_core_dev_attrib_attribute \
606 target_core_dev_attrib_##_name = \
607 __CONFIGFS_EATTR(_name, _mode, \
608 target_core_dev_show_attr_##_name, \
609 target_core_dev_store_attr_##_name);
610
611#define SE_DEV_ATTR_RO(_name); \
612static struct target_core_dev_attrib_attribute \
613 target_core_dev_attrib_##_name = \
614 __CONFIGFS_EATTR_RO(_name, \
615 target_core_dev_show_attr_##_name);
616
617DEF_DEV_ATTRIB(emulate_model_alias);
618SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
619
620DEF_DEV_ATTRIB(emulate_dpo);
621SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
622
623DEF_DEV_ATTRIB(emulate_fua_write);
624SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
625
626DEF_DEV_ATTRIB(emulate_fua_read);
627SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
628
629DEF_DEV_ATTRIB(emulate_write_cache);
630SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
631
632DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
633SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
634
635DEF_DEV_ATTRIB(emulate_tas);
636SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
637
638DEF_DEV_ATTRIB(emulate_tpu);
639SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
640
641DEF_DEV_ATTRIB(emulate_tpws);
642SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
643
644DEF_DEV_ATTRIB(emulate_caw);
645SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
646
647DEF_DEV_ATTRIB(emulate_3pc);
648SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
649
650DEF_DEV_ATTRIB(pi_prot_type);
651SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
652
653DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
654SE_DEV_ATTR_RO(hw_pi_prot_type);
655
656DEF_DEV_ATTRIB(pi_prot_format);
657SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
658
659DEF_DEV_ATTRIB(enforce_pr_isids);
660SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
661
662DEF_DEV_ATTRIB(is_nonrot);
663SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
664
665DEF_DEV_ATTRIB(emulate_rest_reord);
666SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
667
668DEF_DEV_ATTRIB_RO(hw_block_size);
669SE_DEV_ATTR_RO(hw_block_size);
670
671DEF_DEV_ATTRIB(block_size);
672SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
673
674DEF_DEV_ATTRIB_RO(hw_max_sectors);
675SE_DEV_ATTR_RO(hw_max_sectors);
676
677DEF_DEV_ATTRIB(fabric_max_sectors);
678SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
679
680DEF_DEV_ATTRIB(optimal_sectors);
681SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
682
683DEF_DEV_ATTRIB_RO(hw_queue_depth);
684SE_DEV_ATTR_RO(hw_queue_depth);
685
686DEF_DEV_ATTRIB(queue_depth);
687SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
688
689DEF_DEV_ATTRIB(max_unmap_lba_count);
690SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
691
692DEF_DEV_ATTRIB(max_unmap_block_desc_count);
693SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
694
695DEF_DEV_ATTRIB(unmap_granularity);
696SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
697
698DEF_DEV_ATTRIB(unmap_granularity_alignment);
699SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
700
701DEF_DEV_ATTRIB(max_write_same_len);
702SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
703
704CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
705
706static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
707 &target_core_dev_attrib_emulate_model_alias.attr,
708 &target_core_dev_attrib_emulate_dpo.attr,
709 &target_core_dev_attrib_emulate_fua_write.attr,
710 &target_core_dev_attrib_emulate_fua_read.attr,
711 &target_core_dev_attrib_emulate_write_cache.attr,
712 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
713 &target_core_dev_attrib_emulate_tas.attr,
714 &target_core_dev_attrib_emulate_tpu.attr,
715 &target_core_dev_attrib_emulate_tpws.attr,
716 &target_core_dev_attrib_emulate_caw.attr,
717 &target_core_dev_attrib_emulate_3pc.attr,
718 &target_core_dev_attrib_pi_prot_type.attr,
719 &target_core_dev_attrib_hw_pi_prot_type.attr,
720 &target_core_dev_attrib_pi_prot_format.attr,
721 &target_core_dev_attrib_enforce_pr_isids.attr,
722 &target_core_dev_attrib_is_nonrot.attr,
723 &target_core_dev_attrib_emulate_rest_reord.attr,
724 &target_core_dev_attrib_hw_block_size.attr,
725 &target_core_dev_attrib_block_size.attr,
726 &target_core_dev_attrib_hw_max_sectors.attr,
727 &target_core_dev_attrib_fabric_max_sectors.attr,
728 &target_core_dev_attrib_optimal_sectors.attr,
729 &target_core_dev_attrib_hw_queue_depth.attr,
730 &target_core_dev_attrib_queue_depth.attr,
731 &target_core_dev_attrib_max_unmap_lba_count.attr,
732 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
733 &target_core_dev_attrib_unmap_granularity.attr,
734 &target_core_dev_attrib_unmap_granularity_alignment.attr,
735 &target_core_dev_attrib_max_write_same_len.attr,
736 NULL,
737};
738
739static struct configfs_item_operations target_core_dev_attrib_ops = {
740 .show_attribute = target_core_dev_attrib_attr_show,
741 .store_attribute = target_core_dev_attrib_attr_store,
742};
743
744static struct config_item_type target_core_dev_attrib_cit = {
745 .ct_item_ops = &target_core_dev_attrib_ops,
746 .ct_attrs = target_core_dev_attrib_attrs,
747 .ct_owner = THIS_MODULE,
748};
749
750/* End functions for struct config_item_type target_core_dev_attrib_cit */
751
752/* Start functions for struct config_item_type target_core_dev_wwn_cit */
753
754CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
755#define SE_DEV_WWN_ATTR(_name, _mode) \
756static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
757 __CONFIGFS_EATTR(_name, _mode, \
758 target_core_dev_wwn_show_attr_##_name, \
759 target_core_dev_wwn_store_attr_##_name);
760
761#define SE_DEV_WWN_ATTR_RO(_name); \
762do { \
763 static struct target_core_dev_wwn_attribute \
764 target_core_dev_wwn_##_name = \
765 __CONFIGFS_EATTR_RO(_name, \
766 target_core_dev_wwn_show_attr_##_name); \
767} while (0);
768
769/*
770 * VPD page 0x80 Unit serial
771 */
772static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
773 struct t10_wwn *t10_wwn,
774 char *page)
775{
776 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
777 &t10_wwn->unit_serial[0]);
778}
779
780static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
781 struct t10_wwn *t10_wwn,
782 const char *page,
783 size_t count)
784{
785 struct se_device *dev = t10_wwn->t10_dev;
786 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
787
788 /*
789 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
790 * from the struct scsi_device level firmware, do not allow
791 * VPD Unit Serial to be emulated.
792 *
793 * Note this struct scsi_device could also be emulating VPD
794 * information from its drivers/scsi LLD. But for now we assume
795 * it is doing 'the right thing' wrt a world wide unique
796 * VPD Unit Serial Number that OS dependent multipath can depend on.
797 */
798 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
799 pr_err("Underlying SCSI device firmware provided VPD"
800 " Unit Serial, ignoring request\n");
801 return -EOPNOTSUPP;
802 }
803
804 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
805 pr_err("Emulated VPD Unit Serial exceeds"
806 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
807 return -EOVERFLOW;
808 }
809 /*
810 * Check to see if any active $FABRIC_MOD exports exist. If they
811 * do exist, fail here as changing this information on the fly
812 * (underneath the initiator side OS dependent multipath code)
813 * could cause negative effects.
814 */
815 if (dev->export_count) {
816 pr_err("Unable to set VPD Unit Serial while"
817 " active %d $FABRIC_MOD exports exist\n",
818 dev->export_count);
819 return -EINVAL;
820 }
821
822 /*
823 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
824 *
825 * Also, strip any newline added from the userspace
826 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
827 */
828 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
829 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
830 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
831 "%s", strstrip(buf));
832 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
833
834 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
835 " %s\n", dev->t10_wwn.unit_serial);
836
837 return count;
838}
839
840SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
841
842/*
843 * VPD page 0x83 Protocol Identifier
844 */
845static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
846 struct t10_wwn *t10_wwn,
847 char *page)
848{
849 struct t10_vpd *vpd;
850 unsigned char buf[VPD_TMP_BUF_SIZE];
851 ssize_t len = 0;
852
853 memset(buf, 0, VPD_TMP_BUF_SIZE);
854
855 spin_lock(&t10_wwn->t10_vpd_lock);
856 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
857 if (!vpd->protocol_identifier_set)
858 continue;
859
860 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
861
862 if (len + strlen(buf) >= PAGE_SIZE)
863 break;
864
865 len += sprintf(page+len, "%s", buf);
866 }
867 spin_unlock(&t10_wwn->t10_vpd_lock);
868
869 return len;
870}
871
872static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
873 struct t10_wwn *t10_wwn,
874 const char *page,
875 size_t count)
876{
877 return -ENOSYS;
878}
879
880SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
881
882/*
883 * Generic wrapper for dumping VPD identifiers by association.
884 */
885#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
886static ssize_t target_core_dev_wwn_show_attr_##_name( \
887 struct t10_wwn *t10_wwn, \
888 char *page) \
889{ \
890 struct t10_vpd *vpd; \
891 unsigned char buf[VPD_TMP_BUF_SIZE]; \
892 ssize_t len = 0; \
893 \
894 spin_lock(&t10_wwn->t10_vpd_lock); \
895 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
896 if (vpd->association != _assoc) \
897 continue; \
898 \
899 memset(buf, 0, VPD_TMP_BUF_SIZE); \
900 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
901 if (len + strlen(buf) >= PAGE_SIZE) \
902 break; \
903 len += sprintf(page+len, "%s", buf); \
904 \
905 memset(buf, 0, VPD_TMP_BUF_SIZE); \
906 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
907 if (len + strlen(buf) >= PAGE_SIZE) \
908 break; \
909 len += sprintf(page+len, "%s", buf); \
910 \
911 memset(buf, 0, VPD_TMP_BUF_SIZE); \
912 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
913 if (len + strlen(buf) >= PAGE_SIZE) \
914 break; \
915 len += sprintf(page+len, "%s", buf); \
916 } \
917 spin_unlock(&t10_wwn->t10_vpd_lock); \
918 \
919 return len; \
920}
921
922/*
923 * VPD page 0x83 Association: Logical Unit
924 */
925DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
926
927static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
928 struct t10_wwn *t10_wwn,
929 const char *page,
930 size_t count)
931{
932 return -ENOSYS;
933}
934
935SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
936
937/*
938 * VPD page 0x83 Association: Target Port
939 */
940DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
941
942static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
943 struct t10_wwn *t10_wwn,
944 const char *page,
945 size_t count)
946{
947 return -ENOSYS;
948}
949
950SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
951
952/*
953 * VPD page 0x83 Association: SCSI Target Device
954 */
955DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
956
957static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
958 struct t10_wwn *t10_wwn,
959 const char *page,
960 size_t count)
961{
962 return -ENOSYS;
963}
964
965SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
966
967CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
968
969static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
970 &target_core_dev_wwn_vpd_unit_serial.attr,
971 &target_core_dev_wwn_vpd_protocol_identifier.attr,
972 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
973 &target_core_dev_wwn_vpd_assoc_target_port.attr,
974 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
975 NULL,
976};
977
978static struct configfs_item_operations target_core_dev_wwn_ops = {
979 .show_attribute = target_core_dev_wwn_attr_show,
980 .store_attribute = target_core_dev_wwn_attr_store,
981};
982
983static struct config_item_type target_core_dev_wwn_cit = {
984 .ct_item_ops = &target_core_dev_wwn_ops,
985 .ct_attrs = target_core_dev_wwn_attrs,
986 .ct_owner = THIS_MODULE,
987};
988
989/* End functions for struct config_item_type target_core_dev_wwn_cit */
990
991/* Start functions for struct config_item_type target_core_dev_pr_cit */
992
993CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
994#define SE_DEV_PR_ATTR(_name, _mode) \
995static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
996 __CONFIGFS_EATTR(_name, _mode, \
997 target_core_dev_pr_show_attr_##_name, \
998 target_core_dev_pr_store_attr_##_name);
999
1000#define SE_DEV_PR_ATTR_RO(_name); \
1001static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1002 __CONFIGFS_EATTR_RO(_name, \
1003 target_core_dev_pr_show_attr_##_name);
1004
1005static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1006 char *page)
1007{
1008 struct se_node_acl *se_nacl;
1009 struct t10_pr_registration *pr_reg;
1010 char i_buf[PR_REG_ISID_ID_LEN];
1011
1012 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1013
1014 pr_reg = dev->dev_pr_res_holder;
1015 if (!pr_reg)
1016 return sprintf(page, "No SPC-3 Reservation holder\n");
1017
1018 se_nacl = pr_reg->pr_reg_nacl;
1019 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1020
1021 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1022 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1023 se_nacl->initiatorname, i_buf);
1024}
1025
1026static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1027 char *page)
1028{
1029 struct se_node_acl *se_nacl;
1030 ssize_t len;
1031
1032 se_nacl = dev->dev_reserved_node_acl;
1033 if (se_nacl) {
1034 len = sprintf(page,
1035 "SPC-2 Reservation: %s Initiator: %s\n",
1036 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1037 se_nacl->initiatorname);
1038 } else {
1039 len = sprintf(page, "No SPC-2 Reservation holder\n");
1040 }
1041 return len;
1042}
1043
1044static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1045 char *page)
1046{
1047 int ret;
1048
1049 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1050 return sprintf(page, "Passthrough\n");
1051
1052 spin_lock(&dev->dev_reservation_lock);
1053 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1054 ret = target_core_dev_pr_show_spc2_res(dev, page);
1055 else
1056 ret = target_core_dev_pr_show_spc3_res(dev, page);
1057 spin_unlock(&dev->dev_reservation_lock);
1058 return ret;
1059}
1060
1061SE_DEV_PR_ATTR_RO(res_holder);
1062
1063static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1064 struct se_device *dev, char *page)
1065{
1066 ssize_t len = 0;
1067
1068 spin_lock(&dev->dev_reservation_lock);
1069 if (!dev->dev_pr_res_holder) {
1070 len = sprintf(page, "No SPC-3 Reservation holder\n");
1071 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1072 len = sprintf(page, "SPC-3 Reservation: All Target"
1073 " Ports registration\n");
1074 } else {
1075 len = sprintf(page, "SPC-3 Reservation: Single"
1076 " Target Port registration\n");
1077 }
1078
1079 spin_unlock(&dev->dev_reservation_lock);
1080 return len;
1081}
1082
1083SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1084
1085static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1086 struct se_device *dev, char *page)
1087{
1088 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1089}
1090
1091SE_DEV_PR_ATTR_RO(res_pr_generation);
1092
1093/*
1094 * res_pr_holder_tg_port
1095 */
1096static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1097 struct se_device *dev, char *page)
1098{
1099 struct se_node_acl *se_nacl;
1100 struct se_lun *lun;
1101 struct se_portal_group *se_tpg;
1102 struct t10_pr_registration *pr_reg;
1103 struct target_core_fabric_ops *tfo;
1104 ssize_t len = 0;
1105
1106 spin_lock(&dev->dev_reservation_lock);
1107 pr_reg = dev->dev_pr_res_holder;
1108 if (!pr_reg) {
1109 len = sprintf(page, "No SPC-3 Reservation holder\n");
1110 goto out_unlock;
1111 }
1112
1113 se_nacl = pr_reg->pr_reg_nacl;
1114 se_tpg = se_nacl->se_tpg;
1115 lun = pr_reg->pr_reg_tg_pt_lun;
1116 tfo = se_tpg->se_tpg_tfo;
1117
1118 len += sprintf(page+len, "SPC-3 Reservation: %s"
1119 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1120 tfo->tpg_get_wwn(se_tpg));
1121 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1122 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1123 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1124 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1125 tfo->get_fabric_name(), lun->unpacked_lun);
1126
1127out_unlock:
1128 spin_unlock(&dev->dev_reservation_lock);
1129 return len;
1130}
1131
1132SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1133
1134static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1135 struct se_device *dev, char *page)
1136{
1137 struct target_core_fabric_ops *tfo;
1138 struct t10_pr_registration *pr_reg;
1139 unsigned char buf[384];
1140 char i_buf[PR_REG_ISID_ID_LEN];
1141 ssize_t len = 0;
1142 int reg_count = 0;
1143
1144 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1145
1146 spin_lock(&dev->t10_pr.registration_lock);
1147 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1148 pr_reg_list) {
1149
1150 memset(buf, 0, 384);
1151 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1152 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1153 core_pr_dump_initiator_port(pr_reg, i_buf,
1154 PR_REG_ISID_ID_LEN);
1155 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1156 tfo->get_fabric_name(),
1157 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1158 pr_reg->pr_res_generation);
1159
1160 if (len + strlen(buf) >= PAGE_SIZE)
1161 break;
1162
1163 len += sprintf(page+len, "%s", buf);
1164 reg_count++;
1165 }
1166 spin_unlock(&dev->t10_pr.registration_lock);
1167
1168 if (!reg_count)
1169 len += sprintf(page+len, "None\n");
1170
1171 return len;
1172}
1173
1174SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1175
1176static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1177 struct se_device *dev, char *page)
1178{
1179 struct t10_pr_registration *pr_reg;
1180 ssize_t len = 0;
1181
1182 spin_lock(&dev->dev_reservation_lock);
1183 pr_reg = dev->dev_pr_res_holder;
1184 if (pr_reg) {
1185 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1186 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1187 } else {
1188 len = sprintf(page, "No SPC-3 Reservation holder\n");
1189 }
1190
1191 spin_unlock(&dev->dev_reservation_lock);
1192 return len;
1193}
1194
1195SE_DEV_PR_ATTR_RO(res_pr_type);
1196
1197static ssize_t target_core_dev_pr_show_attr_res_type(
1198 struct se_device *dev, char *page)
1199{
1200 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1201 return sprintf(page, "SPC_PASSTHROUGH\n");
1202 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1203 return sprintf(page, "SPC2_RESERVATIONS\n");
1204 else
1205 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1206}
1207
1208SE_DEV_PR_ATTR_RO(res_type);
1209
1210static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1211 struct se_device *dev, char *page)
1212{
1213 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1214 return 0;
1215
1216 return sprintf(page, "APTPL Bit Status: %s\n",
1217 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1218}
1219
1220SE_DEV_PR_ATTR_RO(res_aptpl_active);
1221
1222/*
1223 * res_aptpl_metadata
1224 */
1225static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1226 struct se_device *dev, char *page)
1227{
1228 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1229 return 0;
1230
1231 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1232}
1233
1234enum {
1235 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1236 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1237 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1238 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1239};
1240
1241static match_table_t tokens = {
1242 {Opt_initiator_fabric, "initiator_fabric=%s"},
1243 {Opt_initiator_node, "initiator_node=%s"},
1244 {Opt_initiator_sid, "initiator_sid=%s"},
1245 {Opt_sa_res_key, "sa_res_key=%s"},
1246 {Opt_res_holder, "res_holder=%d"},
1247 {Opt_res_type, "res_type=%d"},
1248 {Opt_res_scope, "res_scope=%d"},
1249 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1250 {Opt_mapped_lun, "mapped_lun=%d"},
1251 {Opt_target_fabric, "target_fabric=%s"},
1252 {Opt_target_node, "target_node=%s"},
1253 {Opt_tpgt, "tpgt=%d"},
1254 {Opt_port_rtpi, "port_rtpi=%d"},
1255 {Opt_target_lun, "target_lun=%d"},
1256 {Opt_err, NULL}
1257};
1258
1259static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1260 struct se_device *dev,
1261 const char *page,
1262 size_t count)
1263{
1264 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1265 unsigned char *t_fabric = NULL, *t_port = NULL;
1266 char *orig, *ptr, *arg_p, *opts;
1267 substring_t args[MAX_OPT_ARGS];
1268 unsigned long long tmp_ll;
1269 u64 sa_res_key = 0;
1270 u32 mapped_lun = 0, target_lun = 0;
1271 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1272 u16 port_rpti = 0, tpgt = 0;
1273 u8 type = 0, scope;
1274
1275 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1276 return 0;
1277 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1278 return 0;
1279
1280 if (dev->export_count) {
1281 pr_debug("Unable to process APTPL metadata while"
1282 " active fabric exports exist\n");
1283 return -EINVAL;
1284 }
1285
1286 opts = kstrdup(page, GFP_KERNEL);
1287 if (!opts)
1288 return -ENOMEM;
1289
1290 orig = opts;
1291 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1292 if (!*ptr)
1293 continue;
1294
1295 token = match_token(ptr, tokens, args);
1296 switch (token) {
1297 case Opt_initiator_fabric:
1298 i_fabric = match_strdup(&args[0]);
1299 if (!i_fabric) {
1300 ret = -ENOMEM;
1301 goto out;
1302 }
1303 break;
1304 case Opt_initiator_node:
1305 i_port = match_strdup(&args[0]);
1306 if (!i_port) {
1307 ret = -ENOMEM;
1308 goto out;
1309 }
1310 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1311 pr_err("APTPL metadata initiator_node="
1312 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1313 PR_APTPL_MAX_IPORT_LEN);
1314 ret = -EINVAL;
1315 break;
1316 }
1317 break;
1318 case Opt_initiator_sid:
1319 isid = match_strdup(&args[0]);
1320 if (!isid) {
1321 ret = -ENOMEM;
1322 goto out;
1323 }
1324 if (strlen(isid) >= PR_REG_ISID_LEN) {
1325 pr_err("APTPL metadata initiator_isid"
1326 "= exceeds PR_REG_ISID_LEN: %d\n",
1327 PR_REG_ISID_LEN);
1328 ret = -EINVAL;
1329 break;
1330 }
1331 break;
1332 case Opt_sa_res_key:
1333 arg_p = match_strdup(&args[0]);
1334 if (!arg_p) {
1335 ret = -ENOMEM;
1336 goto out;
1337 }
1338 ret = kstrtoull(arg_p, 0, &tmp_ll);
1339 if (ret < 0) {
1340 pr_err("kstrtoull() failed for"
1341 " sa_res_key=\n");
1342 goto out;
1343 }
1344 sa_res_key = (u64)tmp_ll;
1345 break;
1346 /*
1347 * PR APTPL Metadata for Reservation
1348 */
1349 case Opt_res_holder:
1350 match_int(args, &arg);
1351 res_holder = arg;
1352 break;
1353 case Opt_res_type:
1354 match_int(args, &arg);
1355 type = (u8)arg;
1356 break;
1357 case Opt_res_scope:
1358 match_int(args, &arg);
1359 scope = (u8)arg;
1360 break;
1361 case Opt_res_all_tg_pt:
1362 match_int(args, &arg);
1363 all_tg_pt = (int)arg;
1364 break;
1365 case Opt_mapped_lun:
1366 match_int(args, &arg);
1367 mapped_lun = (u32)arg;
1368 break;
1369 /*
1370 * PR APTPL Metadata for Target Port
1371 */
1372 case Opt_target_fabric:
1373 t_fabric = match_strdup(&args[0]);
1374 if (!t_fabric) {
1375 ret = -ENOMEM;
1376 goto out;
1377 }
1378 break;
1379 case Opt_target_node:
1380 t_port = match_strdup(&args[0]);
1381 if (!t_port) {
1382 ret = -ENOMEM;
1383 goto out;
1384 }
1385 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1386 pr_err("APTPL metadata target_node="
1387 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1388 PR_APTPL_MAX_TPORT_LEN);
1389 ret = -EINVAL;
1390 break;
1391 }
1392 break;
1393 case Opt_tpgt:
1394 match_int(args, &arg);
1395 tpgt = (u16)arg;
1396 break;
1397 case Opt_port_rtpi:
1398 match_int(args, &arg);
1399 port_rpti = (u16)arg;
1400 break;
1401 case Opt_target_lun:
1402 match_int(args, &arg);
1403 target_lun = (u32)arg;
1404 break;
1405 default:
1406 break;
1407 }
1408 }
1409
1410 if (!i_port || !t_port || !sa_res_key) {
1411 pr_err("Illegal parameters for APTPL registration\n");
1412 ret = -EINVAL;
1413 goto out;
1414 }
1415
1416 if (res_holder && !(type)) {
1417 pr_err("Illegal PR type: 0x%02x for reservation"
1418 " holder\n", type);
1419 ret = -EINVAL;
1420 goto out;
1421 }
1422
1423 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1424 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1425 res_holder, all_tg_pt, type);
1426out:
1427 kfree(i_fabric);
1428 kfree(i_port);
1429 kfree(isid);
1430 kfree(t_fabric);
1431 kfree(t_port);
1432 kfree(orig);
1433 return (ret == 0) ? count : ret;
1434}
1435
1436SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1437
1438CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1439
1440static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1441 &target_core_dev_pr_res_holder.attr,
1442 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1443 &target_core_dev_pr_res_pr_generation.attr,
1444 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1445 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1446 &target_core_dev_pr_res_pr_type.attr,
1447 &target_core_dev_pr_res_type.attr,
1448 &target_core_dev_pr_res_aptpl_active.attr,
1449 &target_core_dev_pr_res_aptpl_metadata.attr,
1450 NULL,
1451};
1452
1453static struct configfs_item_operations target_core_dev_pr_ops = {
1454 .show_attribute = target_core_dev_pr_attr_show,
1455 .store_attribute = target_core_dev_pr_attr_store,
1456};
1457
1458static struct config_item_type target_core_dev_pr_cit = {
1459 .ct_item_ops = &target_core_dev_pr_ops,
1460 .ct_attrs = target_core_dev_pr_attrs,
1461 .ct_owner = THIS_MODULE,
1462};
1463
1464/* End functions for struct config_item_type target_core_dev_pr_cit */
1465
1466/* Start functions for struct config_item_type target_core_dev_cit */
1467
1468static ssize_t target_core_show_dev_info(void *p, char *page)
1469{
1470 struct se_device *dev = p;
1471 struct se_subsystem_api *t = dev->transport;
1472 int bl = 0;
1473 ssize_t read_bytes = 0;
1474
1475 transport_dump_dev_state(dev, page, &bl);
1476 read_bytes += bl;
1477 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1478 return read_bytes;
1479}
1480
1481static struct target_core_configfs_attribute target_core_attr_dev_info = {
1482 .attr = { .ca_owner = THIS_MODULE,
1483 .ca_name = "info",
1484 .ca_mode = S_IRUGO },
1485 .show = target_core_show_dev_info,
1486 .store = NULL,
1487};
1488
1489static ssize_t target_core_store_dev_control(
1490 void *p,
1491 const char *page,
1492 size_t count)
1493{
1494 struct se_device *dev = p;
1495 struct se_subsystem_api *t = dev->transport;
1496
1497 return t->set_configfs_dev_params(dev, page, count);
1498}
1499
1500static struct target_core_configfs_attribute target_core_attr_dev_control = {
1501 .attr = { .ca_owner = THIS_MODULE,
1502 .ca_name = "control",
1503 .ca_mode = S_IWUSR },
1504 .show = NULL,
1505 .store = target_core_store_dev_control,
1506};
1507
1508static ssize_t target_core_show_dev_alias(void *p, char *page)
1509{
1510 struct se_device *dev = p;
1511
1512 if (!(dev->dev_flags & DF_USING_ALIAS))
1513 return 0;
1514
1515 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1516}
1517
1518static ssize_t target_core_store_dev_alias(
1519 void *p,
1520 const char *page,
1521 size_t count)
1522{
1523 struct se_device *dev = p;
1524 struct se_hba *hba = dev->se_hba;
1525 ssize_t read_bytes;
1526
1527 if (count > (SE_DEV_ALIAS_LEN-1)) {
1528 pr_err("alias count: %d exceeds"
1529 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1530 SE_DEV_ALIAS_LEN-1);
1531 return -EINVAL;
1532 }
1533
1534 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1535 if (!read_bytes)
1536 return -EINVAL;
1537 if (dev->dev_alias[read_bytes - 1] == '\n')
1538 dev->dev_alias[read_bytes - 1] = '\0';
1539
1540 dev->dev_flags |= DF_USING_ALIAS;
1541
1542 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1543 config_item_name(&hba->hba_group.cg_item),
1544 config_item_name(&dev->dev_group.cg_item),
1545 dev->dev_alias);
1546
1547 return read_bytes;
1548}
1549
1550static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1551 .attr = { .ca_owner = THIS_MODULE,
1552 .ca_name = "alias",
1553 .ca_mode = S_IRUGO | S_IWUSR },
1554 .show = target_core_show_dev_alias,
1555 .store = target_core_store_dev_alias,
1556};
1557
1558static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1559{
1560 struct se_device *dev = p;
1561
1562 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1563 return 0;
1564
1565 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1566}
1567
1568static ssize_t target_core_store_dev_udev_path(
1569 void *p,
1570 const char *page,
1571 size_t count)
1572{
1573 struct se_device *dev = p;
1574 struct se_hba *hba = dev->se_hba;
1575 ssize_t read_bytes;
1576
1577 if (count > (SE_UDEV_PATH_LEN-1)) {
1578 pr_err("udev_path count: %d exceeds"
1579 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1580 SE_UDEV_PATH_LEN-1);
1581 return -EINVAL;
1582 }
1583
1584 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1585 "%s", page);
1586 if (!read_bytes)
1587 return -EINVAL;
1588 if (dev->udev_path[read_bytes - 1] == '\n')
1589 dev->udev_path[read_bytes - 1] = '\0';
1590
1591 dev->dev_flags |= DF_USING_UDEV_PATH;
1592
1593 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1594 config_item_name(&hba->hba_group.cg_item),
1595 config_item_name(&dev->dev_group.cg_item),
1596 dev->udev_path);
1597
1598 return read_bytes;
1599}
1600
1601static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1602 .attr = { .ca_owner = THIS_MODULE,
1603 .ca_name = "udev_path",
1604 .ca_mode = S_IRUGO | S_IWUSR },
1605 .show = target_core_show_dev_udev_path,
1606 .store = target_core_store_dev_udev_path,
1607};
1608
1609static ssize_t target_core_show_dev_enable(void *p, char *page)
1610{
1611 struct se_device *dev = p;
1612
1613 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1614}
1615
1616static ssize_t target_core_store_dev_enable(
1617 void *p,
1618 const char *page,
1619 size_t count)
1620{
1621 struct se_device *dev = p;
1622 char *ptr;
1623 int ret;
1624
1625 ptr = strstr(page, "1");
1626 if (!ptr) {
1627 pr_err("For dev_enable ops, only valid value"
1628 " is \"1\"\n");
1629 return -EINVAL;
1630 }
1631
1632 ret = target_configure_device(dev);
1633 if (ret)
1634 return ret;
1635 return count;
1636}
1637
1638static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1639 .attr = { .ca_owner = THIS_MODULE,
1640 .ca_name = "enable",
1641 .ca_mode = S_IRUGO | S_IWUSR },
1642 .show = target_core_show_dev_enable,
1643 .store = target_core_store_dev_enable,
1644};
1645
1646static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1647{
1648 struct se_device *dev = p;
1649 struct config_item *lu_ci;
1650 struct t10_alua_lu_gp *lu_gp;
1651 struct t10_alua_lu_gp_member *lu_gp_mem;
1652 ssize_t len = 0;
1653
1654 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1655 if (!lu_gp_mem)
1656 return 0;
1657
1658 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1659 lu_gp = lu_gp_mem->lu_gp;
1660 if (lu_gp) {
1661 lu_ci = &lu_gp->lu_gp_group.cg_item;
1662 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1663 config_item_name(lu_ci), lu_gp->lu_gp_id);
1664 }
1665 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1666
1667 return len;
1668}
1669
1670static ssize_t target_core_store_alua_lu_gp(
1671 void *p,
1672 const char *page,
1673 size_t count)
1674{
1675 struct se_device *dev = p;
1676 struct se_hba *hba = dev->se_hba;
1677 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1678 struct t10_alua_lu_gp_member *lu_gp_mem;
1679 unsigned char buf[LU_GROUP_NAME_BUF];
1680 int move = 0;
1681
1682 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1683 if (!lu_gp_mem)
1684 return 0;
1685
1686 if (count > LU_GROUP_NAME_BUF) {
1687 pr_err("ALUA LU Group Alias too large!\n");
1688 return -EINVAL;
1689 }
1690 memset(buf, 0, LU_GROUP_NAME_BUF);
1691 memcpy(buf, page, count);
1692 /*
1693 * Any ALUA logical unit alias besides "NULL" means we will be
1694 * making a new group association.
1695 */
1696 if (strcmp(strstrip(buf), "NULL")) {
1697 /*
1698 * core_alua_get_lu_gp_by_name() will increment reference to
1699 * struct t10_alua_lu_gp. This reference is released with
1700 * core_alua_get_lu_gp_by_name below().
1701 */
1702 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1703 if (!lu_gp_new)
1704 return -ENODEV;
1705 }
1706
1707 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1708 lu_gp = lu_gp_mem->lu_gp;
1709 if (lu_gp) {
1710 /*
1711 * Clearing an existing lu_gp association, and replacing
1712 * with NULL
1713 */
1714 if (!lu_gp_new) {
1715 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1716 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1717 " %hu\n",
1718 config_item_name(&hba->hba_group.cg_item),
1719 config_item_name(&dev->dev_group.cg_item),
1720 config_item_name(&lu_gp->lu_gp_group.cg_item),
1721 lu_gp->lu_gp_id);
1722
1723 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1724 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1725
1726 return count;
1727 }
1728 /*
1729 * Removing existing association of lu_gp_mem with lu_gp
1730 */
1731 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1732 move = 1;
1733 }
1734 /*
1735 * Associate lu_gp_mem with lu_gp_new.
1736 */
1737 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1738 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1739
1740 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1741 " core/alua/lu_gps/%s, ID: %hu\n",
1742 (move) ? "Moving" : "Adding",
1743 config_item_name(&hba->hba_group.cg_item),
1744 config_item_name(&dev->dev_group.cg_item),
1745 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1746 lu_gp_new->lu_gp_id);
1747
1748 core_alua_put_lu_gp_from_name(lu_gp_new);
1749 return count;
1750}
1751
1752static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1753 .attr = { .ca_owner = THIS_MODULE,
1754 .ca_name = "alua_lu_gp",
1755 .ca_mode = S_IRUGO | S_IWUSR },
1756 .show = target_core_show_alua_lu_gp,
1757 .store = target_core_store_alua_lu_gp,
1758};
1759
1760static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1761{
1762 struct se_device *dev = p;
1763 struct t10_alua_lba_map *map;
1764 struct t10_alua_lba_map_member *mem;
1765 char *b = page;
1766 int bl = 0;
1767 char state;
1768
1769 spin_lock(&dev->t10_alua.lba_map_lock);
1770 if (!list_empty(&dev->t10_alua.lba_map_list))
1771 bl += sprintf(b + bl, "%u %u\n",
1772 dev->t10_alua.lba_map_segment_size,
1773 dev->t10_alua.lba_map_segment_multiplier);
1774 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1775 bl += sprintf(b + bl, "%llu %llu",
1776 map->lba_map_first_lba, map->lba_map_last_lba);
1777 list_for_each_entry(mem, &map->lba_map_mem_list,
1778 lba_map_mem_list) {
1779 switch (mem->lba_map_mem_alua_state) {
1780 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1781 state = 'O';
1782 break;
1783 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1784 state = 'A';
1785 break;
1786 case ALUA_ACCESS_STATE_STANDBY:
1787 state = 'S';
1788 break;
1789 case ALUA_ACCESS_STATE_UNAVAILABLE:
1790 state = 'U';
1791 break;
1792 default:
1793 state = '.';
1794 break;
1795 }
1796 bl += sprintf(b + bl, " %d:%c",
1797 mem->lba_map_mem_alua_pg_id, state);
1798 }
1799 bl += sprintf(b + bl, "\n");
1800 }
1801 spin_unlock(&dev->t10_alua.lba_map_lock);
1802 return bl;
1803}
1804
1805static ssize_t target_core_store_dev_lba_map(
1806 void *p,
1807 const char *page,
1808 size_t count)
1809{
1810 struct se_device *dev = p;
1811 struct t10_alua_lba_map *lba_map = NULL;
1812 struct list_head lba_list;
1813 char *map_entries, *ptr;
1814 char state;
1815 int pg_num = -1, pg;
1816 int ret = 0, num = 0, pg_id, alua_state;
1817 unsigned long start_lba = -1, end_lba = -1;
1818 unsigned long segment_size = -1, segment_mult = -1;
1819
1820 map_entries = kstrdup(page, GFP_KERNEL);
1821 if (!map_entries)
1822 return -ENOMEM;
1823
1824 INIT_LIST_HEAD(&lba_list);
1825 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1826 if (!*ptr)
1827 continue;
1828
1829 if (num == 0) {
1830 if (sscanf(ptr, "%lu %lu\n",
1831 &segment_size, &segment_mult) != 2) {
1832 pr_err("Invalid line %d\n", num);
1833 ret = -EINVAL;
1834 break;
1835 }
1836 num++;
1837 continue;
1838 }
1839 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1840 pr_err("Invalid line %d\n", num);
1841 ret = -EINVAL;
1842 break;
1843 }
1844 ptr = strchr(ptr, ' ');
1845 if (!ptr) {
1846 pr_err("Invalid line %d, missing end lba\n", num);
1847 ret = -EINVAL;
1848 break;
1849 }
1850 ptr++;
1851 ptr = strchr(ptr, ' ');
1852 if (!ptr) {
1853 pr_err("Invalid line %d, missing state definitions\n",
1854 num);
1855 ret = -EINVAL;
1856 break;
1857 }
1858 ptr++;
1859 lba_map = core_alua_allocate_lba_map(&lba_list,
1860 start_lba, end_lba);
1861 if (IS_ERR(lba_map)) {
1862 ret = PTR_ERR(lba_map);
1863 break;
1864 }
1865 pg = 0;
1866 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1867 switch (state) {
1868 case 'O':
1869 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1870 break;
1871 case 'A':
1872 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1873 break;
1874 case 'S':
1875 alua_state = ALUA_ACCESS_STATE_STANDBY;
1876 break;
1877 case 'U':
1878 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1879 break;
1880 default:
1881 pr_err("Invalid ALUA state '%c'\n", state);
1882 ret = -EINVAL;
1883 goto out;
1884 }
1885
1886 ret = core_alua_allocate_lba_map_mem(lba_map,
1887 pg_id, alua_state);
1888 if (ret) {
1889 pr_err("Invalid target descriptor %d:%c "
1890 "at line %d\n",
1891 pg_id, state, num);
1892 break;
1893 }
1894 pg++;
1895 ptr = strchr(ptr, ' ');
1896 if (ptr)
1897 ptr++;
1898 else
1899 break;
1900 }
1901 if (pg_num == -1)
1902 pg_num = pg;
1903 else if (pg != pg_num) {
1904 pr_err("Only %d from %d port groups definitions "
1905 "at line %d\n", pg, pg_num, num);
1906 ret = -EINVAL;
1907 break;
1908 }
1909 num++;
1910 }
1911out:
1912 if (ret) {
1913 core_alua_free_lba_map(&lba_list);
1914 count = ret;
1915 } else
1916 core_alua_set_lba_map(dev, &lba_list,
1917 segment_size, segment_mult);
1918 kfree(map_entries);
1919 return count;
1920}
1921
1922static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1923 .attr = { .ca_owner = THIS_MODULE,
1924 .ca_name = "lba_map",
1925 .ca_mode = S_IRUGO | S_IWUSR },
1926 .show = target_core_show_dev_lba_map,
1927 .store = target_core_store_dev_lba_map,
1928};
1929
1930static struct configfs_attribute *lio_core_dev_attrs[] = {
1931 &target_core_attr_dev_info.attr,
1932 &target_core_attr_dev_control.attr,
1933 &target_core_attr_dev_alias.attr,
1934 &target_core_attr_dev_udev_path.attr,
1935 &target_core_attr_dev_enable.attr,
1936 &target_core_attr_dev_alua_lu_gp.attr,
1937 &target_core_attr_dev_lba_map.attr,
1938 NULL,
1939};
1940
1941static void target_core_dev_release(struct config_item *item)
1942{
1943 struct config_group *dev_cg = to_config_group(item);
1944 struct se_device *dev =
1945 container_of(dev_cg, struct se_device, dev_group);
1946
1947 kfree(dev_cg->default_groups);
1948 target_free_device(dev);
1949}
1950
1951static ssize_t target_core_dev_show(struct config_item *item,
1952 struct configfs_attribute *attr,
1953 char *page)
1954{
1955 struct config_group *dev_cg = to_config_group(item);
1956 struct se_device *dev =
1957 container_of(dev_cg, struct se_device, dev_group);
1958 struct target_core_configfs_attribute *tc_attr = container_of(
1959 attr, struct target_core_configfs_attribute, attr);
1960
1961 if (!tc_attr->show)
1962 return -EINVAL;
1963
1964 return tc_attr->show(dev, page);
1965}
1966
1967static ssize_t target_core_dev_store(struct config_item *item,
1968 struct configfs_attribute *attr,
1969 const char *page, size_t count)
1970{
1971 struct config_group *dev_cg = to_config_group(item);
1972 struct se_device *dev =
1973 container_of(dev_cg, struct se_device, dev_group);
1974 struct target_core_configfs_attribute *tc_attr = container_of(
1975 attr, struct target_core_configfs_attribute, attr);
1976
1977 if (!tc_attr->store)
1978 return -EINVAL;
1979
1980 return tc_attr->store(dev, page, count);
1981}
1982
1983static struct configfs_item_operations target_core_dev_item_ops = {
1984 .release = target_core_dev_release,
1985 .show_attribute = target_core_dev_show,
1986 .store_attribute = target_core_dev_store,
1987};
1988
1989static struct config_item_type target_core_dev_cit = {
1990 .ct_item_ops = &target_core_dev_item_ops,
1991 .ct_attrs = lio_core_dev_attrs,
1992 .ct_owner = THIS_MODULE,
1993};
1994
1995/* End functions for struct config_item_type target_core_dev_cit */
1996
1997/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1998
1999CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2000#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2001static struct target_core_alua_lu_gp_attribute \
2002 target_core_alua_lu_gp_##_name = \
2003 __CONFIGFS_EATTR(_name, _mode, \
2004 target_core_alua_lu_gp_show_attr_##_name, \
2005 target_core_alua_lu_gp_store_attr_##_name);
2006
2007#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2008static struct target_core_alua_lu_gp_attribute \
2009 target_core_alua_lu_gp_##_name = \
2010 __CONFIGFS_EATTR_RO(_name, \
2011 target_core_alua_lu_gp_show_attr_##_name);
2012
2013/*
2014 * lu_gp_id
2015 */
2016static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2017 struct t10_alua_lu_gp *lu_gp,
2018 char *page)
2019{
2020 if (!lu_gp->lu_gp_valid_id)
2021 return 0;
2022
2023 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2024}
2025
2026static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2027 struct t10_alua_lu_gp *lu_gp,
2028 const char *page,
2029 size_t count)
2030{
2031 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2032 unsigned long lu_gp_id;
2033 int ret;
2034
2035 ret = kstrtoul(page, 0, &lu_gp_id);
2036 if (ret < 0) {
2037 pr_err("kstrtoul() returned %d for"
2038 " lu_gp_id\n", ret);
2039 return ret;
2040 }
2041 if (lu_gp_id > 0x0000ffff) {
2042 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2043 " 0x0000ffff\n", lu_gp_id);
2044 return -EINVAL;
2045 }
2046
2047 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2048 if (ret < 0)
2049 return -EINVAL;
2050
2051 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2052 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2053 config_item_name(&alua_lu_gp_cg->cg_item),
2054 lu_gp->lu_gp_id);
2055
2056 return count;
2057}
2058
2059SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2060
2061/*
2062 * members
2063 */
2064static ssize_t target_core_alua_lu_gp_show_attr_members(
2065 struct t10_alua_lu_gp *lu_gp,
2066 char *page)
2067{
2068 struct se_device *dev;
2069 struct se_hba *hba;
2070 struct t10_alua_lu_gp_member *lu_gp_mem;
2071 ssize_t len = 0, cur_len;
2072 unsigned char buf[LU_GROUP_NAME_BUF];
2073
2074 memset(buf, 0, LU_GROUP_NAME_BUF);
2075
2076 spin_lock(&lu_gp->lu_gp_lock);
2077 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2078 dev = lu_gp_mem->lu_gp_mem_dev;
2079 hba = dev->se_hba;
2080
2081 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2082 config_item_name(&hba->hba_group.cg_item),
2083 config_item_name(&dev->dev_group.cg_item));
2084 cur_len++; /* Extra byte for NULL terminator */
2085
2086 if ((cur_len + len) > PAGE_SIZE) {
2087 pr_warn("Ran out of lu_gp_show_attr"
2088 "_members buffer\n");
2089 break;
2090 }
2091 memcpy(page+len, buf, cur_len);
2092 len += cur_len;
2093 }
2094 spin_unlock(&lu_gp->lu_gp_lock);
2095
2096 return len;
2097}
2098
2099SE_DEV_ALUA_LU_ATTR_RO(members);
2100
2101CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2102
2103static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2104 &target_core_alua_lu_gp_lu_gp_id.attr,
2105 &target_core_alua_lu_gp_members.attr,
2106 NULL,
2107};
2108
2109static void target_core_alua_lu_gp_release(struct config_item *item)
2110{
2111 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2112 struct t10_alua_lu_gp, lu_gp_group);
2113
2114 core_alua_free_lu_gp(lu_gp);
2115}
2116
2117static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2118 .release = target_core_alua_lu_gp_release,
2119 .show_attribute = target_core_alua_lu_gp_attr_show,
2120 .store_attribute = target_core_alua_lu_gp_attr_store,
2121};
2122
2123static struct config_item_type target_core_alua_lu_gp_cit = {
2124 .ct_item_ops = &target_core_alua_lu_gp_ops,
2125 .ct_attrs = target_core_alua_lu_gp_attrs,
2126 .ct_owner = THIS_MODULE,
2127};
2128
2129/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2130
2131/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2132
2133static struct config_group *target_core_alua_create_lu_gp(
2134 struct config_group *group,
2135 const char *name)
2136{
2137 struct t10_alua_lu_gp *lu_gp;
2138 struct config_group *alua_lu_gp_cg = NULL;
2139 struct config_item *alua_lu_gp_ci = NULL;
2140
2141 lu_gp = core_alua_allocate_lu_gp(name, 0);
2142 if (IS_ERR(lu_gp))
2143 return NULL;
2144
2145 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2146 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2147
2148 config_group_init_type_name(alua_lu_gp_cg, name,
2149 &target_core_alua_lu_gp_cit);
2150
2151 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2152 " Group: core/alua/lu_gps/%s\n",
2153 config_item_name(alua_lu_gp_ci));
2154
2155 return alua_lu_gp_cg;
2156
2157}
2158
2159static void target_core_alua_drop_lu_gp(
2160 struct config_group *group,
2161 struct config_item *item)
2162{
2163 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2164 struct t10_alua_lu_gp, lu_gp_group);
2165
2166 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2167 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2168 config_item_name(item), lu_gp->lu_gp_id);
2169 /*
2170 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2171 * -> target_core_alua_lu_gp_release()
2172 */
2173 config_item_put(item);
2174}
2175
2176static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2177 .make_group = &target_core_alua_create_lu_gp,
2178 .drop_item = &target_core_alua_drop_lu_gp,
2179};
2180
2181static struct config_item_type target_core_alua_lu_gps_cit = {
2182 .ct_item_ops = NULL,
2183 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2184 .ct_owner = THIS_MODULE,
2185};
2186
2187/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2188
2189/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2190
2191CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2192#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2193static struct target_core_alua_tg_pt_gp_attribute \
2194 target_core_alua_tg_pt_gp_##_name = \
2195 __CONFIGFS_EATTR(_name, _mode, \
2196 target_core_alua_tg_pt_gp_show_attr_##_name, \
2197 target_core_alua_tg_pt_gp_store_attr_##_name);
2198
2199#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2200static struct target_core_alua_tg_pt_gp_attribute \
2201 target_core_alua_tg_pt_gp_##_name = \
2202 __CONFIGFS_EATTR_RO(_name, \
2203 target_core_alua_tg_pt_gp_show_attr_##_name);
2204
2205/*
2206 * alua_access_state
2207 */
2208static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2209 struct t10_alua_tg_pt_gp *tg_pt_gp,
2210 char *page)
2211{
2212 return sprintf(page, "%d\n",
2213 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2214}
2215
2216static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2217 struct t10_alua_tg_pt_gp *tg_pt_gp,
2218 const char *page,
2219 size_t count)
2220{
2221 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2222 unsigned long tmp;
2223 int new_state, ret;
2224
2225 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2226 pr_err("Unable to do implicit ALUA on non valid"
2227 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2228 return -EINVAL;
2229 }
2230 if (!(dev->dev_flags & DF_CONFIGURED)) {
2231 pr_err("Unable to set alua_access_state while device is"
2232 " not configured\n");
2233 return -ENODEV;
2234 }
2235
2236 ret = kstrtoul(page, 0, &tmp);
2237 if (ret < 0) {
2238 pr_err("Unable to extract new ALUA access state from"
2239 " %s\n", page);
2240 return ret;
2241 }
2242 new_state = (int)tmp;
2243
2244 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2245 pr_err("Unable to process implicit configfs ALUA"
2246 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2247 return -EINVAL;
2248 }
2249 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2250 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2251 /* LBA DEPENDENT is only allowed with implicit ALUA */
2252 pr_err("Unable to process implicit configfs ALUA transition"
2253 " while explicit ALUA management is enabled\n");
2254 return -EINVAL;
2255 }
2256
2257 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2258 NULL, NULL, new_state, 0);
2259 return (!ret) ? count : -EINVAL;
2260}
2261
2262SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2263
2264/*
2265 * alua_access_status
2266 */
2267static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2268 struct t10_alua_tg_pt_gp *tg_pt_gp,
2269 char *page)
2270{
2271 return sprintf(page, "%s\n",
2272 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2273}
2274
2275static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2276 struct t10_alua_tg_pt_gp *tg_pt_gp,
2277 const char *page,
2278 size_t count)
2279{
2280 unsigned long tmp;
2281 int new_status, ret;
2282
2283 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2284 pr_err("Unable to do set ALUA access status on non"
2285 " valid tg_pt_gp ID: %hu\n",
2286 tg_pt_gp->tg_pt_gp_valid_id);
2287 return -EINVAL;
2288 }
2289
2290 ret = kstrtoul(page, 0, &tmp);
2291 if (ret < 0) {
2292 pr_err("Unable to extract new ALUA access status"
2293 " from %s\n", page);
2294 return ret;
2295 }
2296 new_status = (int)tmp;
2297
2298 if ((new_status != ALUA_STATUS_NONE) &&
2299 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2300 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2301 pr_err("Illegal ALUA access status: 0x%02x\n",
2302 new_status);
2303 return -EINVAL;
2304 }
2305
2306 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2307 return count;
2308}
2309
2310SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2311
2312/*
2313 * alua_access_type
2314 */
2315static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2316 struct t10_alua_tg_pt_gp *tg_pt_gp,
2317 char *page)
2318{
2319 return core_alua_show_access_type(tg_pt_gp, page);
2320}
2321
2322static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2323 struct t10_alua_tg_pt_gp *tg_pt_gp,
2324 const char *page,
2325 size_t count)
2326{
2327 return core_alua_store_access_type(tg_pt_gp, page, count);
2328}
2329
2330SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2331
2332/*
2333 * alua_supported_states
2334 */
2335
2336#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2337static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2338 struct t10_alua_tg_pt_gp *t, char *p) \
2339{ \
2340 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2341}
2342
2343#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2344static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2345 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2346{ \
2347 unsigned long tmp; \
2348 int ret; \
2349 \
2350 if (!t->tg_pt_gp_valid_id) { \
2351 pr_err("Unable to do set ##_name ALUA state on non" \
2352 " valid tg_pt_gp ID: %hu\n", \
2353 t->tg_pt_gp_valid_id); \
2354 return -EINVAL; \
2355 } \
2356 \
2357 ret = kstrtoul(p, 0, &tmp); \
2358 if (ret < 0) { \
2359 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2360 return -EINVAL; \
2361 } \
2362 if (tmp > 1) { \
2363 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2364 return -EINVAL; \
2365 } \
2366 if (!tmp) \
2367 t->_var |= _bit; \
2368 else \
2369 t->_var &= ~_bit; \
2370 \
2371 return c; \
2372}
2373
2374SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2375 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2376SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2377 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2378SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2379
2380SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2381 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2382SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2383 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2384SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2385
2386SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2387 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2388SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2389 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2390SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2391
2392SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2393 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2394SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2395 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2396SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2397
2398SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2399 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2400SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2401 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2402SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2403
2404SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2405 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2406SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2407 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2408SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2409
2410SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2411 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2412SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2413 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2414SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2415
2416/*
2417 * alua_write_metadata
2418 */
2419static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2420 struct t10_alua_tg_pt_gp *tg_pt_gp,
2421 char *page)
2422{
2423 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2424}
2425
2426static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2427 struct t10_alua_tg_pt_gp *tg_pt_gp,
2428 const char *page,
2429 size_t count)
2430{
2431 unsigned long tmp;
2432 int ret;
2433
2434 ret = kstrtoul(page, 0, &tmp);
2435 if (ret < 0) {
2436 pr_err("Unable to extract alua_write_metadata\n");
2437 return ret;
2438 }
2439
2440 if ((tmp != 0) && (tmp != 1)) {
2441 pr_err("Illegal value for alua_write_metadata:"
2442 " %lu\n", tmp);
2443 return -EINVAL;
2444 }
2445 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2446
2447 return count;
2448}
2449
2450SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2451
2452
2453
2454/*
2455 * nonop_delay_msecs
2456 */
2457static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2458 struct t10_alua_tg_pt_gp *tg_pt_gp,
2459 char *page)
2460{
2461 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2462
2463}
2464
2465static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2466 struct t10_alua_tg_pt_gp *tg_pt_gp,
2467 const char *page,
2468 size_t count)
2469{
2470 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2471}
2472
2473SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2474
2475/*
2476 * trans_delay_msecs
2477 */
2478static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2479 struct t10_alua_tg_pt_gp *tg_pt_gp,
2480 char *page)
2481{
2482 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2483}
2484
2485static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2486 struct t10_alua_tg_pt_gp *tg_pt_gp,
2487 const char *page,
2488 size_t count)
2489{
2490 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2491}
2492
2493SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2494
2495/*
2496 * implicit_trans_secs
2497 */
2498static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2499 struct t10_alua_tg_pt_gp *tg_pt_gp,
2500 char *page)
2501{
2502 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2503}
2504
2505static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2506 struct t10_alua_tg_pt_gp *tg_pt_gp,
2507 const char *page,
2508 size_t count)
2509{
2510 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2511}
2512
2513SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2514
2515/*
2516 * preferred
2517 */
2518
2519static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2520 struct t10_alua_tg_pt_gp *tg_pt_gp,
2521 char *page)
2522{
2523 return core_alua_show_preferred_bit(tg_pt_gp, page);
2524}
2525
2526static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2527 struct t10_alua_tg_pt_gp *tg_pt_gp,
2528 const char *page,
2529 size_t count)
2530{
2531 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2532}
2533
2534SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2535
2536/*
2537 * tg_pt_gp_id
2538 */
2539static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2540 struct t10_alua_tg_pt_gp *tg_pt_gp,
2541 char *page)
2542{
2543 if (!tg_pt_gp->tg_pt_gp_valid_id)
2544 return 0;
2545
2546 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2547}
2548
2549static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2550 struct t10_alua_tg_pt_gp *tg_pt_gp,
2551 const char *page,
2552 size_t count)
2553{
2554 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2555 unsigned long tg_pt_gp_id;
2556 int ret;
2557
2558 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2559 if (ret < 0) {
2560 pr_err("kstrtoul() returned %d for"
2561 " tg_pt_gp_id\n", ret);
2562 return ret;
2563 }
2564 if (tg_pt_gp_id > 0x0000ffff) {
2565 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2566 " 0x0000ffff\n", tg_pt_gp_id);
2567 return -EINVAL;
2568 }
2569
2570 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2571 if (ret < 0)
2572 return -EINVAL;
2573
2574 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2575 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2576 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2577 tg_pt_gp->tg_pt_gp_id);
2578
2579 return count;
2580}
2581
2582SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2583
2584/*
2585 * members
2586 */
2587static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2588 struct t10_alua_tg_pt_gp *tg_pt_gp,
2589 char *page)
2590{
2591 struct se_port *port;
2592 struct se_portal_group *tpg;
2593 struct se_lun *lun;
2594 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2595 ssize_t len = 0, cur_len;
2596 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2597
2598 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2599
2600 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2601 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2602 tg_pt_gp_mem_list) {
2603 port = tg_pt_gp_mem->tg_pt;
2604 tpg = port->sep_tpg;
2605 lun = port->sep_lun;
2606
2607 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2608 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2609 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2610 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2611 config_item_name(&lun->lun_group.cg_item));
2612 cur_len++; /* Extra byte for NULL terminator */
2613
2614 if ((cur_len + len) > PAGE_SIZE) {
2615 pr_warn("Ran out of lu_gp_show_attr"
2616 "_members buffer\n");
2617 break;
2618 }
2619 memcpy(page+len, buf, cur_len);
2620 len += cur_len;
2621 }
2622 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2623
2624 return len;
2625}
2626
2627SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2628
2629CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2630 tg_pt_gp_group);
2631
2632static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2633 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2634 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2635 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2636 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2637 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2638 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2639 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2640 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2641 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2642 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2643 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2644 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2645 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2646 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2647 &target_core_alua_tg_pt_gp_preferred.attr,
2648 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2649 &target_core_alua_tg_pt_gp_members.attr,
2650 NULL,
2651};
2652
2653static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2654{
2655 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2656 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2657
2658 core_alua_free_tg_pt_gp(tg_pt_gp);
2659}
2660
2661static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2662 .release = target_core_alua_tg_pt_gp_release,
2663 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2664 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2665};
2666
2667static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2668 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2669 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2670 .ct_owner = THIS_MODULE,
2671};
2672
2673/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2674
2675/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2676
2677static struct config_group *target_core_alua_create_tg_pt_gp(
2678 struct config_group *group,
2679 const char *name)
2680{
2681 struct t10_alua *alua = container_of(group, struct t10_alua,
2682 alua_tg_pt_gps_group);
2683 struct t10_alua_tg_pt_gp *tg_pt_gp;
2684 struct config_group *alua_tg_pt_gp_cg = NULL;
2685 struct config_item *alua_tg_pt_gp_ci = NULL;
2686
2687 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2688 if (!tg_pt_gp)
2689 return NULL;
2690
2691 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2692 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2693
2694 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2695 &target_core_alua_tg_pt_gp_cit);
2696
2697 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2698 " Group: alua/tg_pt_gps/%s\n",
2699 config_item_name(alua_tg_pt_gp_ci));
2700
2701 return alua_tg_pt_gp_cg;
2702}
2703
2704static void target_core_alua_drop_tg_pt_gp(
2705 struct config_group *group,
2706 struct config_item *item)
2707{
2708 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2709 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2710
2711 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2712 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2713 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2714 /*
2715 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2716 * -> target_core_alua_tg_pt_gp_release().
2717 */
2718 config_item_put(item);
2719}
2720
2721static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2722 .make_group = &target_core_alua_create_tg_pt_gp,
2723 .drop_item = &target_core_alua_drop_tg_pt_gp,
2724};
2725
2726static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2727 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2728 .ct_owner = THIS_MODULE,
2729};
2730
2731/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2732
2733/* Start functions for struct config_item_type target_core_alua_cit */
2734
2735/*
2736 * target_core_alua_cit is a ConfigFS group that lives under
2737 * /sys/kernel/config/target/core/alua. There are default groups
2738 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2739 * target_core_alua_cit in target_core_init_configfs() below.
2740 */
2741static struct config_item_type target_core_alua_cit = {
2742 .ct_item_ops = NULL,
2743 .ct_attrs = NULL,
2744 .ct_owner = THIS_MODULE,
2745};
2746
2747/* End functions for struct config_item_type target_core_alua_cit */
2748
2749/* Start functions for struct config_item_type target_core_stat_cit */
2750
2751static struct config_group *target_core_stat_mkdir(
2752 struct config_group *group,
2753 const char *name)
2754{
2755 return ERR_PTR(-ENOSYS);
2756}
2757
2758static void target_core_stat_rmdir(
2759 struct config_group *group,
2760 struct config_item *item)
2761{
2762 return;
2763}
2764
2765static struct configfs_group_operations target_core_stat_group_ops = {
2766 .make_group = &target_core_stat_mkdir,
2767 .drop_item = &target_core_stat_rmdir,
2768};
2769
2770static struct config_item_type target_core_stat_cit = {
2771 .ct_group_ops = &target_core_stat_group_ops,
2772 .ct_owner = THIS_MODULE,
2773};
2774
2775/* End functions for struct config_item_type target_core_stat_cit */
2776
2777/* Start functions for struct config_item_type target_core_hba_cit */
2778
2779static struct config_group *target_core_make_subdev(
2780 struct config_group *group,
2781 const char *name)
2782{
2783 struct t10_alua_tg_pt_gp *tg_pt_gp;
2784 struct se_subsystem_api *t;
2785 struct config_item *hba_ci = &group->cg_item;
2786 struct se_hba *hba = item_to_hba(hba_ci);
2787 struct se_device *dev;
2788 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2789 struct config_group *dev_stat_grp = NULL;
2790 int errno = -ENOMEM, ret;
2791
2792 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2793 if (ret)
2794 return ERR_PTR(ret);
2795 /*
2796 * Locate the struct se_subsystem_api from parent's struct se_hba.
2797 */
2798 t = hba->transport;
2799
2800 dev = target_alloc_device(hba, name);
2801 if (!dev)
2802 goto out_unlock;
2803
2804 dev_cg = &dev->dev_group;
2805
2806 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2807 GFP_KERNEL);
2808 if (!dev_cg->default_groups)
2809 goto out_free_device;
2810
2811 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2812 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2813 &target_core_dev_attrib_cit);
2814 config_group_init_type_name(&dev->dev_pr_group, "pr",
2815 &target_core_dev_pr_cit);
2816 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2817 &target_core_dev_wwn_cit);
2818 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2819 "alua", &target_core_alua_tg_pt_gps_cit);
2820 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2821 "statistics", &target_core_stat_cit);
2822
2823 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2824 dev_cg->default_groups[1] = &dev->dev_pr_group;
2825 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2826 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2827 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2828 dev_cg->default_groups[5] = NULL;
2829 /*
2830 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2831 */
2832 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2833 if (!tg_pt_gp)
2834 goto out_free_dev_cg_default_groups;
2835 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2836
2837 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2838 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2839 GFP_KERNEL);
2840 if (!tg_pt_gp_cg->default_groups) {
2841 pr_err("Unable to allocate tg_pt_gp_cg->"
2842 "default_groups\n");
2843 goto out_free_tg_pt_gp;
2844 }
2845
2846 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2847 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2848 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2849 tg_pt_gp_cg->default_groups[1] = NULL;
2850 /*
2851 * Add core/$HBA/$DEV/statistics/ default groups
2852 */
2853 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2854 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2855 GFP_KERNEL);
2856 if (!dev_stat_grp->default_groups) {
2857 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2858 goto out_free_tg_pt_gp_cg_default_groups;
2859 }
2860 target_stat_setup_dev_default_groups(dev);
2861
2862 mutex_unlock(&hba->hba_access_mutex);
2863 return dev_cg;
2864
2865out_free_tg_pt_gp_cg_default_groups:
2866 kfree(tg_pt_gp_cg->default_groups);
2867out_free_tg_pt_gp:
2868 core_alua_free_tg_pt_gp(tg_pt_gp);
2869out_free_dev_cg_default_groups:
2870 kfree(dev_cg->default_groups);
2871out_free_device:
2872 target_free_device(dev);
2873out_unlock:
2874 mutex_unlock(&hba->hba_access_mutex);
2875 return ERR_PTR(errno);
2876}
2877
2878static void target_core_drop_subdev(
2879 struct config_group *group,
2880 struct config_item *item)
2881{
2882 struct config_group *dev_cg = to_config_group(item);
2883 struct se_device *dev =
2884 container_of(dev_cg, struct se_device, dev_group);
2885 struct se_hba *hba;
2886 struct config_item *df_item;
2887 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2888 int i;
2889
2890 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2891
2892 mutex_lock(&hba->hba_access_mutex);
2893
2894 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2895 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2896 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2897 dev_stat_grp->default_groups[i] = NULL;
2898 config_item_put(df_item);
2899 }
2900 kfree(dev_stat_grp->default_groups);
2901
2902 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2903 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2904 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2905 tg_pt_gp_cg->default_groups[i] = NULL;
2906 config_item_put(df_item);
2907 }
2908 kfree(tg_pt_gp_cg->default_groups);
2909 /*
2910 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2911 * directly from target_core_alua_tg_pt_gp_release().
2912 */
2913 dev->t10_alua.default_tg_pt_gp = NULL;
2914
2915 for (i = 0; dev_cg->default_groups[i]; i++) {
2916 df_item = &dev_cg->default_groups[i]->cg_item;
2917 dev_cg->default_groups[i] = NULL;
2918 config_item_put(df_item);
2919 }
2920 /*
2921 * se_dev is released from target_core_dev_item_ops->release()
2922 */
2923 config_item_put(item);
2924 mutex_unlock(&hba->hba_access_mutex);
2925}
2926
2927static struct configfs_group_operations target_core_hba_group_ops = {
2928 .make_group = target_core_make_subdev,
2929 .drop_item = target_core_drop_subdev,
2930};
2931
2932CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2933#define SE_HBA_ATTR(_name, _mode) \
2934static struct target_core_hba_attribute \
2935 target_core_hba_##_name = \
2936 __CONFIGFS_EATTR(_name, _mode, \
2937 target_core_hba_show_attr_##_name, \
2938 target_core_hba_store_attr_##_name);
2939
2940#define SE_HBA_ATTR_RO(_name) \
2941static struct target_core_hba_attribute \
2942 target_core_hba_##_name = \
2943 __CONFIGFS_EATTR_RO(_name, \
2944 target_core_hba_show_attr_##_name);
2945
2946static ssize_t target_core_hba_show_attr_hba_info(
2947 struct se_hba *hba,
2948 char *page)
2949{
2950 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2951 hba->hba_id, hba->transport->name,
2952 TARGET_CORE_CONFIGFS_VERSION);
2953}
2954
2955SE_HBA_ATTR_RO(hba_info);
2956
2957static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2958 char *page)
2959{
2960 int hba_mode = 0;
2961
2962 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2963 hba_mode = 1;
2964
2965 return sprintf(page, "%d\n", hba_mode);
2966}
2967
2968static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2969 const char *page, size_t count)
2970{
2971 struct se_subsystem_api *transport = hba->transport;
2972 unsigned long mode_flag;
2973 int ret;
2974
2975 if (transport->pmode_enable_hba == NULL)
2976 return -EINVAL;
2977
2978 ret = kstrtoul(page, 0, &mode_flag);
2979 if (ret < 0) {
2980 pr_err("Unable to extract hba mode flag: %d\n", ret);
2981 return ret;
2982 }
2983
2984 if (hba->dev_count) {
2985 pr_err("Unable to set hba_mode with active devices\n");
2986 return -EINVAL;
2987 }
2988
2989 ret = transport->pmode_enable_hba(hba, mode_flag);
2990 if (ret < 0)
2991 return -EINVAL;
2992 if (ret > 0)
2993 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2994 else if (ret == 0)
2995 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2996
2997 return count;
2998}
2999
3000SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3001
3002CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3003
3004static void target_core_hba_release(struct config_item *item)
3005{
3006 struct se_hba *hba = container_of(to_config_group(item),
3007 struct se_hba, hba_group);
3008 core_delete_hba(hba);
3009}
3010
3011static struct configfs_attribute *target_core_hba_attrs[] = {
3012 &target_core_hba_hba_info.attr,
3013 &target_core_hba_hba_mode.attr,
3014 NULL,
3015};
3016
3017static struct configfs_item_operations target_core_hba_item_ops = {
3018 .release = target_core_hba_release,
3019 .show_attribute = target_core_hba_attr_show,
3020 .store_attribute = target_core_hba_attr_store,
3021};
3022
3023static struct config_item_type target_core_hba_cit = {
3024 .ct_item_ops = &target_core_hba_item_ops,
3025 .ct_group_ops = &target_core_hba_group_ops,
3026 .ct_attrs = target_core_hba_attrs,
3027 .ct_owner = THIS_MODULE,
3028};
3029
3030static struct config_group *target_core_call_addhbatotarget(
3031 struct config_group *group,
3032 const char *name)
3033{
3034 char *se_plugin_str, *str, *str2;
3035 struct se_hba *hba;
3036 char buf[TARGET_CORE_NAME_MAX_LEN];
3037 unsigned long plugin_dep_id = 0;
3038 int ret;
3039
3040 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3041 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3042 pr_err("Passed *name strlen(): %d exceeds"
3043 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3044 TARGET_CORE_NAME_MAX_LEN);
3045 return ERR_PTR(-ENAMETOOLONG);
3046 }
3047 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3048
3049 str = strstr(buf, "_");
3050 if (!str) {
3051 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3052 return ERR_PTR(-EINVAL);
3053 }
3054 se_plugin_str = buf;
3055 /*
3056 * Special case for subsystem plugins that have "_" in their names.
3057 * Namely rd_direct and rd_mcp..
3058 */
3059 str2 = strstr(str+1, "_");
3060 if (str2) {
3061 *str2 = '\0'; /* Terminate for *se_plugin_str */
3062 str2++; /* Skip to start of plugin dependent ID */
3063 str = str2;
3064 } else {
3065 *str = '\0'; /* Terminate for *se_plugin_str */
3066 str++; /* Skip to start of plugin dependent ID */
3067 }
3068
3069 ret = kstrtoul(str, 0, &plugin_dep_id);
3070 if (ret < 0) {
3071 pr_err("kstrtoul() returned %d for"
3072 " plugin_dep_id\n", ret);
3073 return ERR_PTR(ret);
3074 }
3075 /*
3076 * Load up TCM subsystem plugins if they have not already been loaded.
3077 */
3078 transport_subsystem_check_init();
3079
3080 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3081 if (IS_ERR(hba))
3082 return ERR_CAST(hba);
3083
3084 config_group_init_type_name(&hba->hba_group, name,
3085 &target_core_hba_cit);
3086
3087 return &hba->hba_group;
3088}
3089
3090static void target_core_call_delhbafromtarget(
3091 struct config_group *group,
3092 struct config_item *item)
3093{
3094 /*
3095 * core_delete_hba() is called from target_core_hba_item_ops->release()
3096 * -> target_core_hba_release()
3097 */
3098 config_item_put(item);
3099}
3100
3101static struct configfs_group_operations target_core_group_ops = {
3102 .make_group = target_core_call_addhbatotarget,
3103 .drop_item = target_core_call_delhbafromtarget,
3104};
3105
3106static struct config_item_type target_core_cit = {
3107 .ct_item_ops = NULL,
3108 .ct_group_ops = &target_core_group_ops,
3109 .ct_attrs = NULL,
3110 .ct_owner = THIS_MODULE,
3111};
3112
3113/* Stop functions for struct config_item_type target_core_hba_cit */
3114
3115static int __init target_core_init_configfs(void)
3116{
3117 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3118 struct config_group *lu_gp_cg = NULL;
3119 struct configfs_subsystem *subsys;
3120 struct t10_alua_lu_gp *lu_gp;
3121 int ret;
3122
3123 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3124 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3125 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3126
3127 subsys = target_core_subsystem[0];
3128 config_group_init(&subsys->su_group);
3129 mutex_init(&subsys->su_mutex);
3130
3131 ret = init_se_kmem_caches();
3132 if (ret < 0)
3133 return ret;
3134 /*
3135 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3136 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3137 */
3138 target_cg = &subsys->su_group;
3139 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3140 GFP_KERNEL);
3141 if (!target_cg->default_groups) {
3142 pr_err("Unable to allocate target_cg->default_groups\n");
3143 ret = -ENOMEM;
3144 goto out_global;
3145 }
3146
3147 config_group_init_type_name(&target_core_hbagroup,
3148 "core", &target_core_cit);
3149 target_cg->default_groups[0] = &target_core_hbagroup;
3150 target_cg->default_groups[1] = NULL;
3151 /*
3152 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3153 */
3154 hba_cg = &target_core_hbagroup;
3155 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3156 GFP_KERNEL);
3157 if (!hba_cg->default_groups) {
3158 pr_err("Unable to allocate hba_cg->default_groups\n");
3159 ret = -ENOMEM;
3160 goto out_global;
3161 }
3162 config_group_init_type_name(&alua_group,
3163 "alua", &target_core_alua_cit);
3164 hba_cg->default_groups[0] = &alua_group;
3165 hba_cg->default_groups[1] = NULL;
3166 /*
3167 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3168 * groups under /sys/kernel/config/target/core/alua/
3169 */
3170 alua_cg = &alua_group;
3171 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3172 GFP_KERNEL);
3173 if (!alua_cg->default_groups) {
3174 pr_err("Unable to allocate alua_cg->default_groups\n");
3175 ret = -ENOMEM;
3176 goto out_global;
3177 }
3178
3179 config_group_init_type_name(&alua_lu_gps_group,
3180 "lu_gps", &target_core_alua_lu_gps_cit);
3181 alua_cg->default_groups[0] = &alua_lu_gps_group;
3182 alua_cg->default_groups[1] = NULL;
3183 /*
3184 * Add core/alua/lu_gps/default_lu_gp
3185 */
3186 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3187 if (IS_ERR(lu_gp)) {
3188 ret = -ENOMEM;
3189 goto out_global;
3190 }
3191
3192 lu_gp_cg = &alua_lu_gps_group;
3193 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3194 GFP_KERNEL);
3195 if (!lu_gp_cg->default_groups) {
3196 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3197 ret = -ENOMEM;
3198 goto out_global;
3199 }
3200
3201 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3202 &target_core_alua_lu_gp_cit);
3203 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3204 lu_gp_cg->default_groups[1] = NULL;
3205 default_lu_gp = lu_gp;
3206 /*
3207 * Register the target_core_mod subsystem with configfs.
3208 */
3209 ret = configfs_register_subsystem(subsys);
3210 if (ret < 0) {
3211 pr_err("Error %d while registering subsystem %s\n",
3212 ret, subsys->su_group.cg_item.ci_namebuf);
3213 goto out_global;
3214 }
3215 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3216 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3217 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3218 /*
3219 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3220 */
3221 ret = rd_module_init();
3222 if (ret < 0)
3223 goto out;
3224
3225 ret = core_dev_setup_virtual_lun0();
3226 if (ret < 0)
3227 goto out;
3228
3229 ret = target_xcopy_setup_pt();
3230 if (ret < 0)
3231 goto out;
3232
3233 return 0;
3234
3235out:
3236 configfs_unregister_subsystem(subsys);
3237 core_dev_release_virtual_lun0();
3238 rd_module_exit();
3239out_global:
3240 if (default_lu_gp) {
3241 core_alua_free_lu_gp(default_lu_gp);
3242 default_lu_gp = NULL;
3243 }
3244 if (lu_gp_cg)
3245 kfree(lu_gp_cg->default_groups);
3246 if (alua_cg)
3247 kfree(alua_cg->default_groups);
3248 if (hba_cg)
3249 kfree(hba_cg->default_groups);
3250 kfree(target_cg->default_groups);
3251 release_se_kmem_caches();
3252 return ret;
3253}
3254
3255static void __exit target_core_exit_configfs(void)
3256{
3257 struct configfs_subsystem *subsys;
3258 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3259 struct config_item *item;
3260 int i;
3261
3262 subsys = target_core_subsystem[0];
3263
3264 lu_gp_cg = &alua_lu_gps_group;
3265 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3266 item = &lu_gp_cg->default_groups[i]->cg_item;
3267 lu_gp_cg->default_groups[i] = NULL;
3268 config_item_put(item);
3269 }
3270 kfree(lu_gp_cg->default_groups);
3271 lu_gp_cg->default_groups = NULL;
3272
3273 alua_cg = &alua_group;
3274 for (i = 0; alua_cg->default_groups[i]; i++) {
3275 item = &alua_cg->default_groups[i]->cg_item;
3276 alua_cg->default_groups[i] = NULL;
3277 config_item_put(item);
3278 }
3279 kfree(alua_cg->default_groups);
3280 alua_cg->default_groups = NULL;
3281
3282 hba_cg = &target_core_hbagroup;
3283 for (i = 0; hba_cg->default_groups[i]; i++) {
3284 item = &hba_cg->default_groups[i]->cg_item;
3285 hba_cg->default_groups[i] = NULL;
3286 config_item_put(item);
3287 }
3288 kfree(hba_cg->default_groups);
3289 hba_cg->default_groups = NULL;
3290 /*
3291 * We expect subsys->su_group.default_groups to be released
3292 * by configfs subsystem provider logic..
3293 */
3294 configfs_unregister_subsystem(subsys);
3295 kfree(subsys->su_group.default_groups);
3296
3297 core_alua_free_lu_gp(default_lu_gp);
3298 default_lu_gp = NULL;
3299
3300 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3301 " Infrastructure\n");
3302
3303 core_dev_release_virtual_lun0();
3304 rd_module_exit();
3305 target_xcopy_release_pt();
3306 release_se_kmem_caches();
3307}
3308
3309MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3310MODULE_AUTHOR("nab@Linux-iSCSI.org");
3311MODULE_LICENSE("GPL");
3312
3313module_init(target_core_init_configfs);
3314module_exit(target_core_exit_configfs);