1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*******************************************************************************
3 * Filename: target_core_configfs.c
5 * This file contains ConfigFS logic for the Generic Target Engine project.
7 * (c) Copyright 2008-2013 Datera, Inc.
9 * Nicholas A. Bellinger <nab@kernel.org>
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
13 ****************************************************************************/
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <generated/utsrelease.h>
18 #include <linux/utsname.h>
19 #include <linux/init.h>
21 #include <linux/namei.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/delay.h>
25 #include <linux/unistd.h>
26 #include <linux/string.h>
27 #include <linux/parser.h>
28 #include <linux/syscalls.h>
29 #include <linux/configfs.h>
30 #include <linux/spinlock.h>
32 #include <target/target_core_base.h>
33 #include <target/target_core_backend.h>
34 #include <target/target_core_fabric.h>
36 #include "target_core_internal.h"
37 #include "target_core_alua.h"
38 #include "target_core_pr.h"
39 #include "target_core_rd.h"
40 #include "target_core_xcopy.h"
42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
45 struct config_item_type *cit = &tb->tb_##_name##_cit; \
47 cit->ct_item_ops = _item_ops; \
48 cit->ct_group_ops = _group_ops; \
49 cit->ct_attrs = _attrs; \
50 cit->ct_owner = tb->ops->owner; \
51 pr_debug("Setup generic %s\n", __stringify(_name)); \
54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
57 struct config_item_type *cit = &tb->tb_##_name##_cit; \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
62 cit->ct_owner = tb->ops->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
66 extern struct t10_alua_lu_gp
*default_lu_gp
;
68 static LIST_HEAD(g_tf_list
);
69 static DEFINE_MUTEX(g_tf_lock
);
71 static struct config_group target_core_hbagroup
;
72 static struct config_group alua_group
;
73 static struct config_group alua_lu_gps_group
;
75 static inline struct se_hba
*
76 item_to_hba(struct config_item
*item
)
78 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
82 * Attributes for /sys/kernel/config/target/
84 static ssize_t
target_core_item_version_show(struct config_item
*item
,
87 return sprintf(page
, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE
"\n", TARGET_CORE_VERSION
,
89 utsname()->sysname
, utsname()->machine
);
92 CONFIGFS_ATTR_RO(target_core_item_
, version
);
94 char db_root
[DB_ROOT_LEN
] = DB_ROOT_DEFAULT
;
95 static char db_root_stage
[DB_ROOT_LEN
];
97 static ssize_t
target_core_item_dbroot_show(struct config_item
*item
,
100 return sprintf(page
, "%s\n", db_root
);
103 static ssize_t
target_core_item_dbroot_store(struct config_item
*item
,
104 const char *page
, size_t count
)
109 mutex_lock(&g_tf_lock
);
110 if (!list_empty(&g_tf_list
)) {
111 mutex_unlock(&g_tf_lock
);
112 pr_err("db_root: cannot be changed: target drivers registered");
116 if (count
> (DB_ROOT_LEN
- 1)) {
117 mutex_unlock(&g_tf_lock
);
118 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
119 (int)count
, DB_ROOT_LEN
- 1);
123 read_bytes
= snprintf(db_root_stage
, DB_ROOT_LEN
, "%s", page
);
125 mutex_unlock(&g_tf_lock
);
128 if (db_root_stage
[read_bytes
- 1] == '\n')
129 db_root_stage
[read_bytes
- 1] = '\0';
131 /* validate new db root before accepting it */
132 fp
= filp_open(db_root_stage
, O_RDONLY
, 0);
134 mutex_unlock(&g_tf_lock
);
135 pr_err("db_root: cannot open: %s\n", db_root_stage
);
138 if (!S_ISDIR(file_inode(fp
)->i_mode
)) {
139 filp_close(fp
, NULL
);
140 mutex_unlock(&g_tf_lock
);
141 pr_err("db_root: not a directory: %s\n", db_root_stage
);
144 filp_close(fp
, NULL
);
146 strncpy(db_root
, db_root_stage
, read_bytes
);
148 mutex_unlock(&g_tf_lock
);
150 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root
);
155 CONFIGFS_ATTR(target_core_item_
, dbroot
);
157 static struct target_fabric_configfs
*target_core_get_fabric(
160 struct target_fabric_configfs
*tf
;
165 mutex_lock(&g_tf_lock
);
166 list_for_each_entry(tf
, &g_tf_list
, tf_list
) {
167 const char *cmp_name
= tf
->tf_ops
->fabric_alias
;
169 cmp_name
= tf
->tf_ops
->fabric_name
;
170 if (!strcmp(cmp_name
, name
)) {
171 atomic_inc(&tf
->tf_access_cnt
);
172 mutex_unlock(&g_tf_lock
);
176 mutex_unlock(&g_tf_lock
);
182 * Called from struct target_core_group_ops->make_group()
184 static struct config_group
*target_core_register_fabric(
185 struct config_group
*group
,
188 struct target_fabric_configfs
*tf
;
191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
192 " %s\n", group
, name
);
194 tf
= target_core_get_fabric(name
);
196 pr_debug("target_core_register_fabric() trying autoload for %s\n",
200 * Below are some hardcoded request_module() calls to automatically
201 * local fabric modules when the following is called:
203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
205 * Note that this does not limit which TCM fabric module can be
206 * registered, but simply provids auto loading logic for modules with
207 * mkdir(2) system calls with known TCM fabric modules.
210 if (!strncmp(name
, "iscsi", 5)) {
212 * Automatically load the LIO Target fabric module when the
213 * following is called:
215 * mkdir -p $CONFIGFS/target/iscsi
217 ret
= request_module("iscsi_target_mod");
219 pr_debug("request_module() failed for"
220 " iscsi_target_mod.ko: %d\n", ret
);
221 return ERR_PTR(-EINVAL
);
223 } else if (!strncmp(name
, "loopback", 8)) {
225 * Automatically load the tcm_loop fabric module when the
226 * following is called:
228 * mkdir -p $CONFIGFS/target/loopback
230 ret
= request_module("tcm_loop");
232 pr_debug("request_module() failed for"
233 " tcm_loop.ko: %d\n", ret
);
234 return ERR_PTR(-EINVAL
);
238 tf
= target_core_get_fabric(name
);
242 pr_debug("target_core_get_fabric() failed for %s\n",
244 return ERR_PTR(-EINVAL
);
246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
247 " %s\n", tf
->tf_ops
->fabric_name
);
249 * On a successful target_core_get_fabric() look, the returned
250 * struct target_fabric_configfs *tf will contain a usage reference.
252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
255 config_group_init_type_name(&tf
->tf_group
, name
, &tf
->tf_wwn_cit
);
257 config_group_init_type_name(&tf
->tf_disc_group
, "discovery_auth",
258 &tf
->tf_discovery_cit
);
259 configfs_add_default_group(&tf
->tf_disc_group
, &tf
->tf_group
);
261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
262 config_item_name(&tf
->tf_group
.cg_item
));
263 return &tf
->tf_group
;
267 * Called from struct target_core_group_ops->drop_item()
269 static void target_core_deregister_fabric(
270 struct config_group
*group
,
271 struct config_item
*item
)
273 struct target_fabric_configfs
*tf
= container_of(
274 to_config_group(item
), struct target_fabric_configfs
, tf_group
);
276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
277 " tf list\n", config_item_name(item
));
279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
280 " %s\n", tf
->tf_ops
->fabric_name
);
281 atomic_dec(&tf
->tf_access_cnt
);
283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
284 " %s\n", config_item_name(item
));
286 configfs_remove_default_groups(&tf
->tf_group
);
287 config_item_put(item
);
290 static struct configfs_group_operations target_core_fabric_group_ops
= {
291 .make_group
= &target_core_register_fabric
,
292 .drop_item
= &target_core_deregister_fabric
,
296 * All item attributes appearing in /sys/kernel/target/ appear here.
298 static struct configfs_attribute
*target_core_fabric_item_attrs
[] = {
299 &target_core_item_attr_version
,
300 &target_core_item_attr_dbroot
,
305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
307 static const struct config_item_type target_core_fabrics_item
= {
308 .ct_group_ops
= &target_core_fabric_group_ops
,
309 .ct_attrs
= target_core_fabric_item_attrs
,
310 .ct_owner
= THIS_MODULE
,
313 static struct configfs_subsystem target_core_fabrics
= {
316 .ci_namebuf
= "target",
317 .ci_type
= &target_core_fabrics_item
,
322 int target_depend_item(struct config_item
*item
)
324 return configfs_depend_item(&target_core_fabrics
, item
);
326 EXPORT_SYMBOL(target_depend_item
);
328 void target_undepend_item(struct config_item
*item
)
330 return configfs_undepend_item(item
);
332 EXPORT_SYMBOL(target_undepend_item
);
334 /*##############################################################################
335 // Start functions called by external Target Fabrics Modules
336 //############################################################################*/
338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops
*tfo
)
340 if (tfo
->fabric_alias
) {
341 if (strlen(tfo
->fabric_alias
) >= TARGET_FABRIC_NAME_SIZE
) {
342 pr_err("Passed alias: %s exceeds "
343 "TARGET_FABRIC_NAME_SIZE\n", tfo
->fabric_alias
);
347 if (!tfo
->fabric_name
) {
348 pr_err("Missing tfo->fabric_name\n");
351 if (strlen(tfo
->fabric_name
) >= TARGET_FABRIC_NAME_SIZE
) {
352 pr_err("Passed name: %s exceeds "
353 "TARGET_FABRIC_NAME_SIZE\n", tfo
->fabric_name
);
356 if (!tfo
->tpg_get_wwn
) {
357 pr_err("Missing tfo->tpg_get_wwn()\n");
360 if (!tfo
->tpg_get_tag
) {
361 pr_err("Missing tfo->tpg_get_tag()\n");
364 if (!tfo
->tpg_check_demo_mode
) {
365 pr_err("Missing tfo->tpg_check_demo_mode()\n");
368 if (!tfo
->tpg_check_demo_mode_cache
) {
369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
372 if (!tfo
->tpg_check_demo_mode_write_protect
) {
373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
376 if (!tfo
->tpg_check_prod_mode_write_protect
) {
377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
380 if (!tfo
->tpg_get_inst_index
) {
381 pr_err("Missing tfo->tpg_get_inst_index()\n");
384 if (!tfo
->release_cmd
) {
385 pr_err("Missing tfo->release_cmd()\n");
388 if (!tfo
->sess_get_index
) {
389 pr_err("Missing tfo->sess_get_index()\n");
392 if (!tfo
->write_pending
) {
393 pr_err("Missing tfo->write_pending()\n");
396 if (!tfo
->set_default_node_attributes
) {
397 pr_err("Missing tfo->set_default_node_attributes()\n");
400 if (!tfo
->get_cmd_state
) {
401 pr_err("Missing tfo->get_cmd_state()\n");
404 if (!tfo
->queue_data_in
) {
405 pr_err("Missing tfo->queue_data_in()\n");
408 if (!tfo
->queue_status
) {
409 pr_err("Missing tfo->queue_status()\n");
412 if (!tfo
->queue_tm_rsp
) {
413 pr_err("Missing tfo->queue_tm_rsp()\n");
416 if (!tfo
->aborted_task
) {
417 pr_err("Missing tfo->aborted_task()\n");
420 if (!tfo
->check_stop_free
) {
421 pr_err("Missing tfo->check_stop_free()\n");
425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
427 * target_core_fabric_configfs.c WWN+TPG group context code.
429 if (!tfo
->fabric_make_wwn
) {
430 pr_err("Missing tfo->fabric_make_wwn()\n");
433 if (!tfo
->fabric_drop_wwn
) {
434 pr_err("Missing tfo->fabric_drop_wwn()\n");
437 if (!tfo
->fabric_make_tpg
) {
438 pr_err("Missing tfo->fabric_make_tpg()\n");
441 if (!tfo
->fabric_drop_tpg
) {
442 pr_err("Missing tfo->fabric_drop_tpg()\n");
449 int target_register_template(const struct target_core_fabric_ops
*fo
)
451 struct target_fabric_configfs
*tf
;
454 ret
= target_fabric_tf_ops_check(fo
);
458 tf
= kzalloc(sizeof(struct target_fabric_configfs
), GFP_KERNEL
);
460 pr_err("%s: could not allocate memory!\n", __func__
);
464 INIT_LIST_HEAD(&tf
->tf_list
);
465 atomic_set(&tf
->tf_access_cnt
, 0);
467 target_fabric_setup_cits(tf
);
469 mutex_lock(&g_tf_lock
);
470 list_add_tail(&tf
->tf_list
, &g_tf_list
);
471 mutex_unlock(&g_tf_lock
);
475 EXPORT_SYMBOL(target_register_template
);
477 void target_unregister_template(const struct target_core_fabric_ops
*fo
)
479 struct target_fabric_configfs
*t
;
481 mutex_lock(&g_tf_lock
);
482 list_for_each_entry(t
, &g_tf_list
, tf_list
) {
483 if (!strcmp(t
->tf_ops
->fabric_name
, fo
->fabric_name
)) {
484 BUG_ON(atomic_read(&t
->tf_access_cnt
));
485 list_del(&t
->tf_list
);
486 mutex_unlock(&g_tf_lock
);
488 * Wait for any outstanding fabric se_deve_entry->rcu_head
489 * callbacks to complete post kfree_rcu(), before allowing
490 * fabric driver unload of TFO->module to proceed.
497 mutex_unlock(&g_tf_lock
);
499 EXPORT_SYMBOL(target_unregister_template
);
501 /*##############################################################################
502 // Stop functions called by external Target Fabrics Modules
503 //############################################################################*/
505 static inline struct se_dev_attrib
*to_attrib(struct config_item
*item
)
507 return container_of(to_config_group(item
), struct se_dev_attrib
,
511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
513 static ssize_t _name##_show(struct config_item *item, char *page) \
515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias
);
519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo
);
520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write
);
521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read
);
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache
);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl
);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas
);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu
);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws
);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw
);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc
);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr
);
530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type
);
531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type
);
532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify
);
533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids
);
534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot
);
535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord
);
536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl
);
537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size
);
538 DEF_CONFIGFS_ATTRIB_SHOW(block_size
);
539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors
);
540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors
);
541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth
);
542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth
);
543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count
);
544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count
);
545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity
);
546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment
);
547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data
);
548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len
);
550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
551 static ssize_t _name##_store(struct config_item *item, const char *page,\
554 struct se_dev_attrib *da = to_attrib(item); \
558 ret = kstrtou32(page, 0, &val); \
565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count
);
566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count
);
567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity
);
568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment
);
569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len
);
571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
572 static ssize_t _name##_store(struct config_item *item, const char *page, \
575 struct se_dev_attrib *da = to_attrib(item); \
579 ret = strtobool(page, &flag); \
586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write
);
587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw
);
588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc
);
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr
);
590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids
);
591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot
);
593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
594 static ssize_t _name##_store(struct config_item *item, const char *page,\
597 printk_once(KERN_WARNING \
598 "ignoring deprecated %s attribute\n", \
599 __stringify(_name)); \
603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo
);
604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read
);
606 static void dev_set_t10_wwn_model_alias(struct se_device
*dev
)
608 const char *configname
;
610 configname
= config_item_name(&dev
->dev_group
.cg_item
);
611 if (strlen(configname
) >= INQUIRY_MODEL_LEN
) {
612 pr_warn("dev[%p]: Backstore name '%s' is too long for "
613 "INQUIRY_MODEL, truncating to 15 characters\n", dev
,
617 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
618 * here without potentially breaking existing setups, so continue to
619 * truncate one byte shorter than what can be carried in INQUIRY.
621 strlcpy(dev
->t10_wwn
.model
, configname
, INQUIRY_MODEL_LEN
);
624 static ssize_t
emulate_model_alias_store(struct config_item
*item
,
625 const char *page
, size_t count
)
627 struct se_dev_attrib
*da
= to_attrib(item
);
628 struct se_device
*dev
= da
->da_dev
;
632 if (dev
->export_count
) {
633 pr_err("dev[%p]: Unable to change model alias"
634 " while export_count is %d\n",
635 dev
, dev
->export_count
);
639 ret
= strtobool(page
, &flag
);
643 BUILD_BUG_ON(sizeof(dev
->t10_wwn
.model
) != INQUIRY_MODEL_LEN
+ 1);
645 dev_set_t10_wwn_model_alias(dev
);
647 strlcpy(dev
->t10_wwn
.model
, dev
->transport
->inquiry_prod
,
648 sizeof(dev
->t10_wwn
.model
));
650 da
->emulate_model_alias
= flag
;
654 static ssize_t
emulate_write_cache_store(struct config_item
*item
,
655 const char *page
, size_t count
)
657 struct se_dev_attrib
*da
= to_attrib(item
);
661 ret
= strtobool(page
, &flag
);
665 if (flag
&& da
->da_dev
->transport
->get_write_cache
) {
666 pr_err("emulate_write_cache not supported for this device\n");
670 da
->emulate_write_cache
= flag
;
671 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
676 static ssize_t
emulate_ua_intlck_ctrl_store(struct config_item
*item
,
677 const char *page
, size_t count
)
679 struct se_dev_attrib
*da
= to_attrib(item
);
683 ret
= kstrtou32(page
, 0, &val
);
687 if (val
!= TARGET_UA_INTLCK_CTRL_CLEAR
688 && val
!= TARGET_UA_INTLCK_CTRL_NO_CLEAR
689 && val
!= TARGET_UA_INTLCK_CTRL_ESTABLISH_UA
) {
690 pr_err("Illegal value %d\n", val
);
694 if (da
->da_dev
->export_count
) {
695 pr_err("dev[%p]: Unable to change SE Device"
696 " UA_INTRLCK_CTRL while export_count is %d\n",
697 da
->da_dev
, da
->da_dev
->export_count
);
700 da
->emulate_ua_intlck_ctrl
= val
;
701 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
706 static ssize_t
emulate_tas_store(struct config_item
*item
,
707 const char *page
, size_t count
)
709 struct se_dev_attrib
*da
= to_attrib(item
);
713 ret
= strtobool(page
, &flag
);
717 if (da
->da_dev
->export_count
) {
718 pr_err("dev[%p]: Unable to change SE Device TAS while"
719 " export_count is %d\n",
720 da
->da_dev
, da
->da_dev
->export_count
);
723 da
->emulate_tas
= flag
;
724 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
725 da
->da_dev
, flag
? "Enabled" : "Disabled");
730 static ssize_t
emulate_tpu_store(struct config_item
*item
,
731 const char *page
, size_t count
)
733 struct se_dev_attrib
*da
= to_attrib(item
);
737 ret
= strtobool(page
, &flag
);
742 * We expect this value to be non-zero when generic Block Layer
743 * Discard supported is detected iblock_create_virtdevice().
745 if (flag
&& !da
->max_unmap_block_desc_count
) {
746 pr_err("Generic Block Discard not supported\n");
750 da
->emulate_tpu
= flag
;
751 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
756 static ssize_t
emulate_tpws_store(struct config_item
*item
,
757 const char *page
, size_t count
)
759 struct se_dev_attrib
*da
= to_attrib(item
);
763 ret
= strtobool(page
, &flag
);
768 * We expect this value to be non-zero when generic Block Layer
769 * Discard supported is detected iblock_create_virtdevice().
771 if (flag
&& !da
->max_unmap_block_desc_count
) {
772 pr_err("Generic Block Discard not supported\n");
776 da
->emulate_tpws
= flag
;
777 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
782 static ssize_t
pi_prot_type_store(struct config_item
*item
,
783 const char *page
, size_t count
)
785 struct se_dev_attrib
*da
= to_attrib(item
);
786 int old_prot
= da
->pi_prot_type
, ret
;
787 struct se_device
*dev
= da
->da_dev
;
790 ret
= kstrtou32(page
, 0, &flag
);
794 if (flag
!= 0 && flag
!= 1 && flag
!= 2 && flag
!= 3) {
795 pr_err("Illegal value %d for pi_prot_type\n", flag
);
799 pr_err("DIF TYPE2 protection currently not supported\n");
802 if (da
->hw_pi_prot_type
) {
803 pr_warn("DIF protection enabled on underlying hardware,"
807 if (!dev
->transport
->init_prot
|| !dev
->transport
->free_prot
) {
808 /* 0 is only allowed value for non-supporting backends */
812 pr_err("DIF protection not supported by backend: %s\n",
813 dev
->transport
->name
);
816 if (!target_dev_configured(dev
)) {
817 pr_err("DIF protection requires device to be configured\n");
820 if (dev
->export_count
) {
821 pr_err("dev[%p]: Unable to change SE Device PROT type while"
822 " export_count is %d\n", dev
, dev
->export_count
);
826 da
->pi_prot_type
= flag
;
828 if (flag
&& !old_prot
) {
829 ret
= dev
->transport
->init_prot(dev
);
831 da
->pi_prot_type
= old_prot
;
832 da
->pi_prot_verify
= (bool) da
->pi_prot_type
;
836 } else if (!flag
&& old_prot
) {
837 dev
->transport
->free_prot(dev
);
840 da
->pi_prot_verify
= (bool) da
->pi_prot_type
;
841 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev
, flag
);
845 /* always zero, but attr needs to remain RW to avoid userspace breakage */
846 static ssize_t
pi_prot_format_show(struct config_item
*item
, char *page
)
848 return snprintf(page
, PAGE_SIZE
, "0\n");
851 static ssize_t
pi_prot_format_store(struct config_item
*item
,
852 const char *page
, size_t count
)
854 struct se_dev_attrib
*da
= to_attrib(item
);
855 struct se_device
*dev
= da
->da_dev
;
859 ret
= strtobool(page
, &flag
);
866 if (!dev
->transport
->format_prot
) {
867 pr_err("DIF protection format not supported by backend %s\n",
868 dev
->transport
->name
);
871 if (!target_dev_configured(dev
)) {
872 pr_err("DIF protection format requires device to be configured\n");
875 if (dev
->export_count
) {
876 pr_err("dev[%p]: Unable to format SE Device PROT type while"
877 " export_count is %d\n", dev
, dev
->export_count
);
881 ret
= dev
->transport
->format_prot(dev
);
885 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev
);
889 static ssize_t
pi_prot_verify_store(struct config_item
*item
,
890 const char *page
, size_t count
)
892 struct se_dev_attrib
*da
= to_attrib(item
);
896 ret
= strtobool(page
, &flag
);
901 da
->pi_prot_verify
= flag
;
904 if (da
->hw_pi_prot_type
) {
905 pr_warn("DIF protection enabled on underlying hardware,"
909 if (!da
->pi_prot_type
) {
910 pr_warn("DIF protection not supported by backend, ignoring\n");
913 da
->pi_prot_verify
= flag
;
918 static ssize_t
force_pr_aptpl_store(struct config_item
*item
,
919 const char *page
, size_t count
)
921 struct se_dev_attrib
*da
= to_attrib(item
);
925 ret
= strtobool(page
, &flag
);
928 if (da
->da_dev
->export_count
) {
929 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
930 " export_count is %d\n",
931 da
->da_dev
, da
->da_dev
->export_count
);
935 da
->force_pr_aptpl
= flag
;
936 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da
->da_dev
, flag
);
940 static ssize_t
emulate_rest_reord_store(struct config_item
*item
,
941 const char *page
, size_t count
)
943 struct se_dev_attrib
*da
= to_attrib(item
);
947 ret
= strtobool(page
, &flag
);
952 printk(KERN_ERR
"dev[%p]: SE Device emulation of restricted"
953 " reordering not implemented\n", da
->da_dev
);
956 da
->emulate_rest_reord
= flag
;
957 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
962 static ssize_t
unmap_zeroes_data_store(struct config_item
*item
,
963 const char *page
, size_t count
)
965 struct se_dev_attrib
*da
= to_attrib(item
);
969 ret
= strtobool(page
, &flag
);
973 if (da
->da_dev
->export_count
) {
974 pr_err("dev[%p]: Unable to change SE Device"
975 " unmap_zeroes_data while export_count is %d\n",
976 da
->da_dev
, da
->da_dev
->export_count
);
980 * We expect this value to be non-zero when generic Block Layer
981 * Discard supported is detected iblock_configure_device().
983 if (flag
&& !da
->max_unmap_block_desc_count
) {
984 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
985 " because max_unmap_block_desc_count is zero\n",
989 da
->unmap_zeroes_data
= flag
;
990 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
996 * Note, this can only be called on unexported SE Device Object.
998 static ssize_t
queue_depth_store(struct config_item
*item
,
999 const char *page
, size_t count
)
1001 struct se_dev_attrib
*da
= to_attrib(item
);
1002 struct se_device
*dev
= da
->da_dev
;
1006 ret
= kstrtou32(page
, 0, &val
);
1010 if (dev
->export_count
) {
1011 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012 " export_count is %d\n",
1013 dev
, dev
->export_count
);
1017 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev
);
1021 if (val
> dev
->dev_attrib
.queue_depth
) {
1022 if (val
> dev
->dev_attrib
.hw_queue_depth
) {
1023 pr_err("dev[%p]: Passed queue_depth:"
1024 " %u exceeds TCM/SE_Device MAX"
1025 " TCQ: %u\n", dev
, val
,
1026 dev
->dev_attrib
.hw_queue_depth
);
1030 da
->queue_depth
= dev
->queue_depth
= val
;
1031 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev
, val
);
1035 static ssize_t
optimal_sectors_store(struct config_item
*item
,
1036 const char *page
, size_t count
)
1038 struct se_dev_attrib
*da
= to_attrib(item
);
1042 ret
= kstrtou32(page
, 0, &val
);
1046 if (da
->da_dev
->export_count
) {
1047 pr_err("dev[%p]: Unable to change SE Device"
1048 " optimal_sectors while export_count is %d\n",
1049 da
->da_dev
, da
->da_dev
->export_count
);
1052 if (val
> da
->hw_max_sectors
) {
1053 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054 " greater than hw_max_sectors: %u\n",
1055 da
->da_dev
, val
, da
->hw_max_sectors
);
1059 da
->optimal_sectors
= val
;
1060 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1065 static ssize_t
block_size_store(struct config_item
*item
,
1066 const char *page
, size_t count
)
1068 struct se_dev_attrib
*da
= to_attrib(item
);
1072 ret
= kstrtou32(page
, 0, &val
);
1076 if (da
->da_dev
->export_count
) {
1077 pr_err("dev[%p]: Unable to change SE Device block_size"
1078 " while export_count is %d\n",
1079 da
->da_dev
, da
->da_dev
->export_count
);
1083 if (val
!= 512 && val
!= 1024 && val
!= 2048 && val
!= 4096) {
1084 pr_err("dev[%p]: Illegal value for block_device: %u"
1085 " for SE device, must be 512, 1024, 2048 or 4096\n",
1090 da
->block_size
= val
;
1091 if (da
->max_bytes_per_io
)
1092 da
->hw_max_sectors
= da
->max_bytes_per_io
/ val
;
1094 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1099 static ssize_t
alua_support_show(struct config_item
*item
, char *page
)
1101 struct se_dev_attrib
*da
= to_attrib(item
);
1102 u8 flags
= da
->da_dev
->transport_flags
;
1104 return snprintf(page
, PAGE_SIZE
, "%d\n",
1105 flags
& TRANSPORT_FLAG_PASSTHROUGH_ALUA
? 0 : 1);
1108 static ssize_t
alua_support_store(struct config_item
*item
,
1109 const char *page
, size_t count
)
1111 struct se_dev_attrib
*da
= to_attrib(item
);
1112 struct se_device
*dev
= da
->da_dev
;
1116 if (!(dev
->transport
->transport_flags_changeable
&
1117 TRANSPORT_FLAG_PASSTHROUGH_ALUA
)) {
1118 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1119 " alua_support has fixed value\n", dev
);
1123 ret
= strtobool(page
, &flag
);
1128 dev
->transport_flags
&= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA
;
1130 dev
->transport_flags
|= TRANSPORT_FLAG_PASSTHROUGH_ALUA
;
1134 static ssize_t
pgr_support_show(struct config_item
*item
, char *page
)
1136 struct se_dev_attrib
*da
= to_attrib(item
);
1137 u8 flags
= da
->da_dev
->transport_flags
;
1139 return snprintf(page
, PAGE_SIZE
, "%d\n",
1140 flags
& TRANSPORT_FLAG_PASSTHROUGH_PGR
? 0 : 1);
1143 static ssize_t
pgr_support_store(struct config_item
*item
,
1144 const char *page
, size_t count
)
1146 struct se_dev_attrib
*da
= to_attrib(item
);
1147 struct se_device
*dev
= da
->da_dev
;
1151 if (!(dev
->transport
->transport_flags_changeable
&
1152 TRANSPORT_FLAG_PASSTHROUGH_PGR
)) {
1153 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1154 " pgr_support has fixed value\n", dev
);
1158 ret
= strtobool(page
, &flag
);
1163 dev
->transport_flags
&= ~TRANSPORT_FLAG_PASSTHROUGH_PGR
;
1165 dev
->transport_flags
|= TRANSPORT_FLAG_PASSTHROUGH_PGR
;
1169 CONFIGFS_ATTR(, emulate_model_alias
);
1170 CONFIGFS_ATTR(, emulate_dpo
);
1171 CONFIGFS_ATTR(, emulate_fua_write
);
1172 CONFIGFS_ATTR(, emulate_fua_read
);
1173 CONFIGFS_ATTR(, emulate_write_cache
);
1174 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl
);
1175 CONFIGFS_ATTR(, emulate_tas
);
1176 CONFIGFS_ATTR(, emulate_tpu
);
1177 CONFIGFS_ATTR(, emulate_tpws
);
1178 CONFIGFS_ATTR(, emulate_caw
);
1179 CONFIGFS_ATTR(, emulate_3pc
);
1180 CONFIGFS_ATTR(, emulate_pr
);
1181 CONFIGFS_ATTR(, pi_prot_type
);
1182 CONFIGFS_ATTR_RO(, hw_pi_prot_type
);
1183 CONFIGFS_ATTR(, pi_prot_format
);
1184 CONFIGFS_ATTR(, pi_prot_verify
);
1185 CONFIGFS_ATTR(, enforce_pr_isids
);
1186 CONFIGFS_ATTR(, is_nonrot
);
1187 CONFIGFS_ATTR(, emulate_rest_reord
);
1188 CONFIGFS_ATTR(, force_pr_aptpl
);
1189 CONFIGFS_ATTR_RO(, hw_block_size
);
1190 CONFIGFS_ATTR(, block_size
);
1191 CONFIGFS_ATTR_RO(, hw_max_sectors
);
1192 CONFIGFS_ATTR(, optimal_sectors
);
1193 CONFIGFS_ATTR_RO(, hw_queue_depth
);
1194 CONFIGFS_ATTR(, queue_depth
);
1195 CONFIGFS_ATTR(, max_unmap_lba_count
);
1196 CONFIGFS_ATTR(, max_unmap_block_desc_count
);
1197 CONFIGFS_ATTR(, unmap_granularity
);
1198 CONFIGFS_ATTR(, unmap_granularity_alignment
);
1199 CONFIGFS_ATTR(, unmap_zeroes_data
);
1200 CONFIGFS_ATTR(, max_write_same_len
);
1201 CONFIGFS_ATTR(, alua_support
);
1202 CONFIGFS_ATTR(, pgr_support
);
1205 * dev_attrib attributes for devices using the target core SBC/SPC
1206 * interpreter. Any backend using spc_parse_cdb should be using
1209 struct configfs_attribute
*sbc_attrib_attrs
[] = {
1210 &attr_emulate_model_alias
,
1212 &attr_emulate_fua_write
,
1213 &attr_emulate_fua_read
,
1214 &attr_emulate_write_cache
,
1215 &attr_emulate_ua_intlck_ctrl
,
1223 &attr_hw_pi_prot_type
,
1224 &attr_pi_prot_format
,
1225 &attr_pi_prot_verify
,
1226 &attr_enforce_pr_isids
,
1228 &attr_emulate_rest_reord
,
1229 &attr_force_pr_aptpl
,
1230 &attr_hw_block_size
,
1232 &attr_hw_max_sectors
,
1233 &attr_optimal_sectors
,
1234 &attr_hw_queue_depth
,
1236 &attr_max_unmap_lba_count
,
1237 &attr_max_unmap_block_desc_count
,
1238 &attr_unmap_granularity
,
1239 &attr_unmap_granularity_alignment
,
1240 &attr_unmap_zeroes_data
,
1241 &attr_max_write_same_len
,
1246 EXPORT_SYMBOL(sbc_attrib_attrs
);
1249 * Minimal dev_attrib attributes for devices passing through CDBs.
1250 * In this case we only provide a few read-only attributes for
1251 * backwards compatibility.
1253 struct configfs_attribute
*passthrough_attrib_attrs
[] = {
1254 &attr_hw_pi_prot_type
,
1255 &attr_hw_block_size
,
1256 &attr_hw_max_sectors
,
1257 &attr_hw_queue_depth
,
1263 EXPORT_SYMBOL(passthrough_attrib_attrs
);
1266 * pr related dev_attrib attributes for devices passing through CDBs,
1267 * but allowing in core pr emulation.
1269 struct configfs_attribute
*passthrough_pr_attrib_attrs
[] = {
1270 &attr_enforce_pr_isids
,
1271 &attr_force_pr_aptpl
,
1274 EXPORT_SYMBOL(passthrough_pr_attrib_attrs
);
1276 TB_CIT_SETUP_DRV(dev_attrib
, NULL
, NULL
);
1277 TB_CIT_SETUP_DRV(dev_action
, NULL
, NULL
);
1279 /* End functions for struct config_item_type tb_dev_attrib_cit */
1281 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1283 static struct t10_wwn
*to_t10_wwn(struct config_item
*item
)
1285 return container_of(to_config_group(item
), struct t10_wwn
, t10_wwn_group
);
1288 static ssize_t
target_check_inquiry_data(char *buf
)
1297 * ASCII data fields shall contain only ASCII printable characters
1298 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1299 * more ASCII null (00h) characters.
1301 for (i
= 0; i
< len
; i
++) {
1302 if (buf
[i
] < 0x20 || buf
[i
] > 0x7E) {
1303 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1312 * STANDARD and VPD page 0x83 T10 Vendor Identification
1314 static ssize_t
target_wwn_vendor_id_show(struct config_item
*item
,
1317 return sprintf(page
, "%s\n", &to_t10_wwn(item
)->vendor
[0]);
1320 static ssize_t
target_wwn_vendor_id_store(struct config_item
*item
,
1321 const char *page
, size_t count
)
1323 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1324 struct se_device
*dev
= t10_wwn
->t10_dev
;
1325 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1326 unsigned char buf
[INQUIRY_VENDOR_LEN
+ 2];
1327 char *stripped
= NULL
;
1331 len
= strlcpy(buf
, page
, sizeof(buf
));
1332 if (len
< sizeof(buf
)) {
1333 /* Strip any newline added from userspace. */
1334 stripped
= strstrip(buf
);
1335 len
= strlen(stripped
);
1337 if (len
> INQUIRY_VENDOR_LEN
) {
1338 pr_err("Emulated T10 Vendor Identification exceeds"
1339 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN
)
1344 ret
= target_check_inquiry_data(stripped
);
1350 * Check to see if any active exports exist. If they do exist, fail
1351 * here as changing this information on the fly (underneath the
1352 * initiator side OS dependent multipath code) could cause negative
1355 if (dev
->export_count
) {
1356 pr_err("Unable to set T10 Vendor Identification while"
1357 " active %d exports exist\n", dev
->export_count
);
1361 BUILD_BUG_ON(sizeof(dev
->t10_wwn
.vendor
) != INQUIRY_VENDOR_LEN
+ 1);
1362 strlcpy(dev
->t10_wwn
.vendor
, stripped
, sizeof(dev
->t10_wwn
.vendor
));
1364 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1365 " %s\n", dev
->t10_wwn
.vendor
);
1370 static ssize_t
target_wwn_product_id_show(struct config_item
*item
,
1373 return sprintf(page
, "%s\n", &to_t10_wwn(item
)->model
[0]);
1376 static ssize_t
target_wwn_product_id_store(struct config_item
*item
,
1377 const char *page
, size_t count
)
1379 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1380 struct se_device
*dev
= t10_wwn
->t10_dev
;
1381 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1382 unsigned char buf
[INQUIRY_MODEL_LEN
+ 2];
1383 char *stripped
= NULL
;
1387 len
= strlcpy(buf
, page
, sizeof(buf
));
1388 if (len
< sizeof(buf
)) {
1389 /* Strip any newline added from userspace. */
1390 stripped
= strstrip(buf
);
1391 len
= strlen(stripped
);
1393 if (len
> INQUIRY_MODEL_LEN
) {
1394 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1395 __stringify(INQUIRY_MODEL_LEN
)
1400 ret
= target_check_inquiry_data(stripped
);
1406 * Check to see if any active exports exist. If they do exist, fail
1407 * here as changing this information on the fly (underneath the
1408 * initiator side OS dependent multipath code) could cause negative
1411 if (dev
->export_count
) {
1412 pr_err("Unable to set T10 Model while active %d exports exist\n",
1417 BUILD_BUG_ON(sizeof(dev
->t10_wwn
.model
) != INQUIRY_MODEL_LEN
+ 1);
1418 strlcpy(dev
->t10_wwn
.model
, stripped
, sizeof(dev
->t10_wwn
.model
));
1420 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1421 dev
->t10_wwn
.model
);
1426 static ssize_t
target_wwn_revision_show(struct config_item
*item
,
1429 return sprintf(page
, "%s\n", &to_t10_wwn(item
)->revision
[0]);
1432 static ssize_t
target_wwn_revision_store(struct config_item
*item
,
1433 const char *page
, size_t count
)
1435 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1436 struct se_device
*dev
= t10_wwn
->t10_dev
;
1437 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1438 unsigned char buf
[INQUIRY_REVISION_LEN
+ 2];
1439 char *stripped
= NULL
;
1443 len
= strlcpy(buf
, page
, sizeof(buf
));
1444 if (len
< sizeof(buf
)) {
1445 /* Strip any newline added from userspace. */
1446 stripped
= strstrip(buf
);
1447 len
= strlen(stripped
);
1449 if (len
> INQUIRY_REVISION_LEN
) {
1450 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1451 __stringify(INQUIRY_REVISION_LEN
)
1456 ret
= target_check_inquiry_data(stripped
);
1462 * Check to see if any active exports exist. If they do exist, fail
1463 * here as changing this information on the fly (underneath the
1464 * initiator side OS dependent multipath code) could cause negative
1467 if (dev
->export_count
) {
1468 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1473 BUILD_BUG_ON(sizeof(dev
->t10_wwn
.revision
) != INQUIRY_REVISION_LEN
+ 1);
1474 strlcpy(dev
->t10_wwn
.revision
, stripped
, sizeof(dev
->t10_wwn
.revision
));
1476 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1477 dev
->t10_wwn
.revision
);
1483 target_wwn_company_id_show(struct config_item
*item
,
1486 return snprintf(page
, PAGE_SIZE
, "%#08x\n",
1487 to_t10_wwn(item
)->company_id
);
1491 target_wwn_company_id_store(struct config_item
*item
,
1492 const char *page
, size_t count
)
1494 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1495 struct se_device
*dev
= t10_wwn
->t10_dev
;
1500 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1501 * form OUI assigned by the IEEE.
1503 ret
= kstrtou32(page
, 0, &val
);
1507 if (val
>= 0x1000000)
1511 * Check to see if any active exports exist. If they do exist, fail
1512 * here as changing this information on the fly (underneath the
1513 * initiator side OS dependent multipath code) could cause negative
1516 if (dev
->export_count
) {
1517 pr_err("Unable to set Company ID while %u exports exist\n",
1522 t10_wwn
->company_id
= val
;
1524 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1525 t10_wwn
->company_id
);
1531 * VPD page 0x80 Unit serial
1533 static ssize_t
target_wwn_vpd_unit_serial_show(struct config_item
*item
,
1536 return sprintf(page
, "T10 VPD Unit Serial Number: %s\n",
1537 &to_t10_wwn(item
)->unit_serial
[0]);
1540 static ssize_t
target_wwn_vpd_unit_serial_store(struct config_item
*item
,
1541 const char *page
, size_t count
)
1543 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1544 struct se_device
*dev
= t10_wwn
->t10_dev
;
1545 unsigned char buf
[INQUIRY_VPD_SERIAL_LEN
] = { };
1548 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1549 * from the struct scsi_device level firmware, do not allow
1550 * VPD Unit Serial to be emulated.
1552 * Note this struct scsi_device could also be emulating VPD
1553 * information from its drivers/scsi LLD. But for now we assume
1554 * it is doing 'the right thing' wrt a world wide unique
1555 * VPD Unit Serial Number that OS dependent multipath can depend on.
1557 if (dev
->dev_flags
& DF_FIRMWARE_VPD_UNIT_SERIAL
) {
1558 pr_err("Underlying SCSI device firmware provided VPD"
1559 " Unit Serial, ignoring request\n");
1563 if (strlen(page
) >= INQUIRY_VPD_SERIAL_LEN
) {
1564 pr_err("Emulated VPD Unit Serial exceeds"
1565 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN
);
1569 * Check to see if any active $FABRIC_MOD exports exist. If they
1570 * do exist, fail here as changing this information on the fly
1571 * (underneath the initiator side OS dependent multipath code)
1572 * could cause negative effects.
1574 if (dev
->export_count
) {
1575 pr_err("Unable to set VPD Unit Serial while"
1576 " active %d $FABRIC_MOD exports exist\n",
1582 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1584 * Also, strip any newline added from the userspace
1585 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1587 snprintf(buf
, INQUIRY_VPD_SERIAL_LEN
, "%s", page
);
1588 snprintf(dev
->t10_wwn
.unit_serial
, INQUIRY_VPD_SERIAL_LEN
,
1589 "%s", strstrip(buf
));
1590 dev
->dev_flags
|= DF_EMULATED_VPD_UNIT_SERIAL
;
1592 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1593 " %s\n", dev
->t10_wwn
.unit_serial
);
1599 * VPD page 0x83 Protocol Identifier
1601 static ssize_t
target_wwn_vpd_protocol_identifier_show(struct config_item
*item
,
1604 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1605 struct t10_vpd
*vpd
;
1606 unsigned char buf
[VPD_TMP_BUF_SIZE
] = { };
1609 spin_lock(&t10_wwn
->t10_vpd_lock
);
1610 list_for_each_entry(vpd
, &t10_wwn
->t10_vpd_list
, vpd_list
) {
1611 if (!vpd
->protocol_identifier_set
)
1614 transport_dump_vpd_proto_id(vpd
, buf
, VPD_TMP_BUF_SIZE
);
1616 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1619 len
+= sprintf(page
+len
, "%s", buf
);
1621 spin_unlock(&t10_wwn
->t10_vpd_lock
);
1627 * Generic wrapper for dumping VPD identifiers by association.
1629 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1630 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1633 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1634 struct t10_vpd *vpd; \
1635 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1638 spin_lock(&t10_wwn->t10_vpd_lock); \
1639 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1640 if (vpd->association != _assoc) \
1643 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1644 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1645 if (len + strlen(buf) >= PAGE_SIZE) \
1647 len += sprintf(page+len, "%s", buf); \
1649 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1650 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1651 if (len + strlen(buf) >= PAGE_SIZE) \
1653 len += sprintf(page+len, "%s", buf); \
1655 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1656 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1657 if (len + strlen(buf) >= PAGE_SIZE) \
1659 len += sprintf(page+len, "%s", buf); \
1661 spin_unlock(&t10_wwn->t10_vpd_lock); \
1666 /* VPD page 0x83 Association: Logical Unit */
1667 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit
, 0x00);
1668 /* VPD page 0x83 Association: Target Port */
1669 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port
, 0x10);
1670 /* VPD page 0x83 Association: SCSI Target Device */
1671 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device
, 0x20);
1673 CONFIGFS_ATTR(target_wwn_
, vendor_id
);
1674 CONFIGFS_ATTR(target_wwn_
, product_id
);
1675 CONFIGFS_ATTR(target_wwn_
, revision
);
1676 CONFIGFS_ATTR(target_wwn_
, company_id
);
1677 CONFIGFS_ATTR(target_wwn_
, vpd_unit_serial
);
1678 CONFIGFS_ATTR_RO(target_wwn_
, vpd_protocol_identifier
);
1679 CONFIGFS_ATTR_RO(target_wwn_
, vpd_assoc_logical_unit
);
1680 CONFIGFS_ATTR_RO(target_wwn_
, vpd_assoc_target_port
);
1681 CONFIGFS_ATTR_RO(target_wwn_
, vpd_assoc_scsi_target_device
);
1683 static struct configfs_attribute
*target_core_dev_wwn_attrs
[] = {
1684 &target_wwn_attr_vendor_id
,
1685 &target_wwn_attr_product_id
,
1686 &target_wwn_attr_revision
,
1687 &target_wwn_attr_company_id
,
1688 &target_wwn_attr_vpd_unit_serial
,
1689 &target_wwn_attr_vpd_protocol_identifier
,
1690 &target_wwn_attr_vpd_assoc_logical_unit
,
1691 &target_wwn_attr_vpd_assoc_target_port
,
1692 &target_wwn_attr_vpd_assoc_scsi_target_device
,
1696 TB_CIT_SETUP(dev_wwn
, NULL
, NULL
, target_core_dev_wwn_attrs
);
1698 /* End functions for struct config_item_type tb_dev_wwn_cit */
1700 /* Start functions for struct config_item_type tb_dev_pr_cit */
1702 static struct se_device
*pr_to_dev(struct config_item
*item
)
1704 return container_of(to_config_group(item
), struct se_device
,
1708 static ssize_t
target_core_dev_pr_show_spc3_res(struct se_device
*dev
,
1711 struct se_node_acl
*se_nacl
;
1712 struct t10_pr_registration
*pr_reg
;
1713 char i_buf
[PR_REG_ISID_ID_LEN
] = { };
1715 pr_reg
= dev
->dev_pr_res_holder
;
1717 return sprintf(page
, "No SPC-3 Reservation holder\n");
1719 se_nacl
= pr_reg
->pr_reg_nacl
;
1720 core_pr_dump_initiator_port(pr_reg
, i_buf
, PR_REG_ISID_ID_LEN
);
1722 return sprintf(page
, "SPC-3 Reservation: %s Initiator: %s%s\n",
1723 se_nacl
->se_tpg
->se_tpg_tfo
->fabric_name
,
1724 se_nacl
->initiatorname
, i_buf
);
1727 static ssize_t
target_core_dev_pr_show_spc2_res(struct se_device
*dev
,
1730 struct se_session
*sess
= dev
->reservation_holder
;
1731 struct se_node_acl
*se_nacl
;
1735 se_nacl
= sess
->se_node_acl
;
1737 "SPC-2 Reservation: %s Initiator: %s\n",
1738 se_nacl
->se_tpg
->se_tpg_tfo
->fabric_name
,
1739 se_nacl
->initiatorname
);
1741 len
= sprintf(page
, "No SPC-2 Reservation holder\n");
1746 static ssize_t
target_pr_res_holder_show(struct config_item
*item
, char *page
)
1748 struct se_device
*dev
= pr_to_dev(item
);
1751 if (!dev
->dev_attrib
.emulate_pr
)
1752 return sprintf(page
, "SPC_RESERVATIONS_DISABLED\n");
1754 if (dev
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH_PGR
)
1755 return sprintf(page
, "Passthrough\n");
1757 spin_lock(&dev
->dev_reservation_lock
);
1758 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1759 ret
= target_core_dev_pr_show_spc2_res(dev
, page
);
1761 ret
= target_core_dev_pr_show_spc3_res(dev
, page
);
1762 spin_unlock(&dev
->dev_reservation_lock
);
1766 static ssize_t
target_pr_res_pr_all_tgt_pts_show(struct config_item
*item
,
1769 struct se_device
*dev
= pr_to_dev(item
);
1772 spin_lock(&dev
->dev_reservation_lock
);
1773 if (!dev
->dev_pr_res_holder
) {
1774 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1775 } else if (dev
->dev_pr_res_holder
->pr_reg_all_tg_pt
) {
1776 len
= sprintf(page
, "SPC-3 Reservation: All Target"
1777 " Ports registration\n");
1779 len
= sprintf(page
, "SPC-3 Reservation: Single"
1780 " Target Port registration\n");
1783 spin_unlock(&dev
->dev_reservation_lock
);
1787 static ssize_t
target_pr_res_pr_generation_show(struct config_item
*item
,
1790 return sprintf(page
, "0x%08x\n", pr_to_dev(item
)->t10_pr
.pr_generation
);
1794 static ssize_t
target_pr_res_pr_holder_tg_port_show(struct config_item
*item
,
1797 struct se_device
*dev
= pr_to_dev(item
);
1798 struct se_node_acl
*se_nacl
;
1799 struct se_portal_group
*se_tpg
;
1800 struct t10_pr_registration
*pr_reg
;
1801 const struct target_core_fabric_ops
*tfo
;
1804 spin_lock(&dev
->dev_reservation_lock
);
1805 pr_reg
= dev
->dev_pr_res_holder
;
1807 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1811 se_nacl
= pr_reg
->pr_reg_nacl
;
1812 se_tpg
= se_nacl
->se_tpg
;
1813 tfo
= se_tpg
->se_tpg_tfo
;
1815 len
+= sprintf(page
+len
, "SPC-3 Reservation: %s"
1816 " Target Node Endpoint: %s\n", tfo
->fabric_name
,
1817 tfo
->tpg_get_wwn(se_tpg
));
1818 len
+= sprintf(page
+len
, "SPC-3 Reservation: Relative Port"
1819 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1820 " %s Logical Unit: %llu\n", pr_reg
->tg_pt_sep_rtpi
,
1821 tfo
->fabric_name
, tfo
->tpg_get_tag(se_tpg
),
1822 tfo
->fabric_name
, pr_reg
->pr_aptpl_target_lun
);
1825 spin_unlock(&dev
->dev_reservation_lock
);
1830 static ssize_t
target_pr_res_pr_registered_i_pts_show(struct config_item
*item
,
1833 struct se_device
*dev
= pr_to_dev(item
);
1834 const struct target_core_fabric_ops
*tfo
;
1835 struct t10_pr_registration
*pr_reg
;
1836 unsigned char buf
[384];
1837 char i_buf
[PR_REG_ISID_ID_LEN
];
1841 len
+= sprintf(page
+len
, "SPC-3 PR Registrations:\n");
1843 spin_lock(&dev
->t10_pr
.registration_lock
);
1844 list_for_each_entry(pr_reg
, &dev
->t10_pr
.registration_list
,
1847 memset(buf
, 0, 384);
1848 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1849 tfo
= pr_reg
->pr_reg_nacl
->se_tpg
->se_tpg_tfo
;
1850 core_pr_dump_initiator_port(pr_reg
, i_buf
,
1851 PR_REG_ISID_ID_LEN
);
1852 sprintf(buf
, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1854 pr_reg
->pr_reg_nacl
->initiatorname
, i_buf
, pr_reg
->pr_res_key
,
1855 pr_reg
->pr_res_generation
);
1857 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1860 len
+= sprintf(page
+len
, "%s", buf
);
1863 spin_unlock(&dev
->t10_pr
.registration_lock
);
1866 len
+= sprintf(page
+len
, "None\n");
1871 static ssize_t
target_pr_res_pr_type_show(struct config_item
*item
, char *page
)
1873 struct se_device
*dev
= pr_to_dev(item
);
1874 struct t10_pr_registration
*pr_reg
;
1877 spin_lock(&dev
->dev_reservation_lock
);
1878 pr_reg
= dev
->dev_pr_res_holder
;
1880 len
= sprintf(page
, "SPC-3 Reservation Type: %s\n",
1881 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
));
1883 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1886 spin_unlock(&dev
->dev_reservation_lock
);
1890 static ssize_t
target_pr_res_type_show(struct config_item
*item
, char *page
)
1892 struct se_device
*dev
= pr_to_dev(item
);
1894 if (!dev
->dev_attrib
.emulate_pr
)
1895 return sprintf(page
, "SPC_RESERVATIONS_DISABLED\n");
1896 if (dev
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH_PGR
)
1897 return sprintf(page
, "SPC_PASSTHROUGH\n");
1898 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1899 return sprintf(page
, "SPC2_RESERVATIONS\n");
1901 return sprintf(page
, "SPC3_PERSISTENT_RESERVATIONS\n");
1904 static ssize_t
target_pr_res_aptpl_active_show(struct config_item
*item
,
1907 struct se_device
*dev
= pr_to_dev(item
);
1909 if (!dev
->dev_attrib
.emulate_pr
||
1910 (dev
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH_PGR
))
1913 return sprintf(page
, "APTPL Bit Status: %s\n",
1914 (dev
->t10_pr
.pr_aptpl_active
) ? "Activated" : "Disabled");
1917 static ssize_t
target_pr_res_aptpl_metadata_show(struct config_item
*item
,
1920 struct se_device
*dev
= pr_to_dev(item
);
1922 if (!dev
->dev_attrib
.emulate_pr
||
1923 (dev
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH_PGR
))
1926 return sprintf(page
, "Ready to process PR APTPL metadata..\n");
1930 Opt_initiator_fabric
, Opt_initiator_node
, Opt_initiator_sid
,
1931 Opt_sa_res_key
, Opt_res_holder
, Opt_res_type
, Opt_res_scope
,
1932 Opt_res_all_tg_pt
, Opt_mapped_lun
, Opt_target_fabric
,
1933 Opt_target_node
, Opt_tpgt
, Opt_port_rtpi
, Opt_target_lun
, Opt_err
1936 static match_table_t tokens
= {
1937 {Opt_initiator_fabric
, "initiator_fabric=%s"},
1938 {Opt_initiator_node
, "initiator_node=%s"},
1939 {Opt_initiator_sid
, "initiator_sid=%s"},
1940 {Opt_sa_res_key
, "sa_res_key=%s"},
1941 {Opt_res_holder
, "res_holder=%d"},
1942 {Opt_res_type
, "res_type=%d"},
1943 {Opt_res_scope
, "res_scope=%d"},
1944 {Opt_res_all_tg_pt
, "res_all_tg_pt=%d"},
1945 {Opt_mapped_lun
, "mapped_lun=%u"},
1946 {Opt_target_fabric
, "target_fabric=%s"},
1947 {Opt_target_node
, "target_node=%s"},
1948 {Opt_tpgt
, "tpgt=%d"},
1949 {Opt_port_rtpi
, "port_rtpi=%d"},
1950 {Opt_target_lun
, "target_lun=%u"},
1954 static ssize_t
target_pr_res_aptpl_metadata_store(struct config_item
*item
,
1955 const char *page
, size_t count
)
1957 struct se_device
*dev
= pr_to_dev(item
);
1958 unsigned char *i_fabric
= NULL
, *i_port
= NULL
, *isid
= NULL
;
1959 unsigned char *t_fabric
= NULL
, *t_port
= NULL
;
1960 char *orig
, *ptr
, *opts
;
1961 substring_t args
[MAX_OPT_ARGS
];
1962 unsigned long long tmp_ll
;
1964 u64 mapped_lun
= 0, target_lun
= 0;
1965 int ret
= -1, res_holder
= 0, all_tg_pt
= 0, arg
, token
;
1969 if (!dev
->dev_attrib
.emulate_pr
||
1970 (dev
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH_PGR
))
1972 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1975 if (dev
->export_count
) {
1976 pr_debug("Unable to process APTPL metadata while"
1977 " active fabric exports exist\n");
1981 opts
= kstrdup(page
, GFP_KERNEL
);
1986 while ((ptr
= strsep(&opts
, ",\n")) != NULL
) {
1990 token
= match_token(ptr
, tokens
, args
);
1992 case Opt_initiator_fabric
:
1993 i_fabric
= match_strdup(args
);
1999 case Opt_initiator_node
:
2000 i_port
= match_strdup(args
);
2005 if (strlen(i_port
) >= PR_APTPL_MAX_IPORT_LEN
) {
2006 pr_err("APTPL metadata initiator_node="
2007 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2008 PR_APTPL_MAX_IPORT_LEN
);
2013 case Opt_initiator_sid
:
2014 isid
= match_strdup(args
);
2019 if (strlen(isid
) >= PR_REG_ISID_LEN
) {
2020 pr_err("APTPL metadata initiator_isid"
2021 "= exceeds PR_REG_ISID_LEN: %d\n",
2027 case Opt_sa_res_key
:
2028 ret
= match_u64(args
, &tmp_ll
);
2030 pr_err("kstrtoull() failed for sa_res_key=\n");
2033 sa_res_key
= (u64
)tmp_ll
;
2036 * PR APTPL Metadata for Reservation
2038 case Opt_res_holder
:
2039 ret
= match_int(args
, &arg
);
2045 ret
= match_int(args
, &arg
);
2051 ret
= match_int(args
, &arg
);
2055 case Opt_res_all_tg_pt
:
2056 ret
= match_int(args
, &arg
);
2059 all_tg_pt
= (int)arg
;
2061 case Opt_mapped_lun
:
2062 ret
= match_u64(args
, &tmp_ll
);
2065 mapped_lun
= (u64
)tmp_ll
;
2068 * PR APTPL Metadata for Target Port
2070 case Opt_target_fabric
:
2071 t_fabric
= match_strdup(args
);
2077 case Opt_target_node
:
2078 t_port
= match_strdup(args
);
2083 if (strlen(t_port
) >= PR_APTPL_MAX_TPORT_LEN
) {
2084 pr_err("APTPL metadata target_node="
2085 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2086 PR_APTPL_MAX_TPORT_LEN
);
2092 ret
= match_int(args
, &arg
);
2098 ret
= match_int(args
, &arg
);
2102 case Opt_target_lun
:
2103 ret
= match_u64(args
, &tmp_ll
);
2106 target_lun
= (u64
)tmp_ll
;
2113 if (!i_port
|| !t_port
|| !sa_res_key
) {
2114 pr_err("Illegal parameters for APTPL registration\n");
2119 if (res_holder
&& !(type
)) {
2120 pr_err("Illegal PR type: 0x%02x for reservation"
2126 ret
= core_scsi3_alloc_aptpl_registration(&dev
->t10_pr
, sa_res_key
,
2127 i_port
, isid
, mapped_lun
, t_port
, tpgt
, target_lun
,
2128 res_holder
, all_tg_pt
, type
);
2136 return (ret
== 0) ? count
: ret
;
2140 CONFIGFS_ATTR_RO(target_pr_
, res_holder
);
2141 CONFIGFS_ATTR_RO(target_pr_
, res_pr_all_tgt_pts
);
2142 CONFIGFS_ATTR_RO(target_pr_
, res_pr_generation
);
2143 CONFIGFS_ATTR_RO(target_pr_
, res_pr_holder_tg_port
);
2144 CONFIGFS_ATTR_RO(target_pr_
, res_pr_registered_i_pts
);
2145 CONFIGFS_ATTR_RO(target_pr_
, res_pr_type
);
2146 CONFIGFS_ATTR_RO(target_pr_
, res_type
);
2147 CONFIGFS_ATTR_RO(target_pr_
, res_aptpl_active
);
2148 CONFIGFS_ATTR(target_pr_
, res_aptpl_metadata
);
2150 static struct configfs_attribute
*target_core_dev_pr_attrs
[] = {
2151 &target_pr_attr_res_holder
,
2152 &target_pr_attr_res_pr_all_tgt_pts
,
2153 &target_pr_attr_res_pr_generation
,
2154 &target_pr_attr_res_pr_holder_tg_port
,
2155 &target_pr_attr_res_pr_registered_i_pts
,
2156 &target_pr_attr_res_pr_type
,
2157 &target_pr_attr_res_type
,
2158 &target_pr_attr_res_aptpl_active
,
2159 &target_pr_attr_res_aptpl_metadata
,
2163 TB_CIT_SETUP(dev_pr
, NULL
, NULL
, target_core_dev_pr_attrs
);
2165 /* End functions for struct config_item_type tb_dev_pr_cit */
2167 /* Start functions for struct config_item_type tb_dev_cit */
2169 static inline struct se_device
*to_device(struct config_item
*item
)
2171 return container_of(to_config_group(item
), struct se_device
, dev_group
);
2174 static ssize_t
target_dev_info_show(struct config_item
*item
, char *page
)
2176 struct se_device
*dev
= to_device(item
);
2178 ssize_t read_bytes
= 0;
2180 transport_dump_dev_state(dev
, page
, &bl
);
2182 read_bytes
+= dev
->transport
->show_configfs_dev_params(dev
,
2187 static ssize_t
target_dev_control_store(struct config_item
*item
,
2188 const char *page
, size_t count
)
2190 struct se_device
*dev
= to_device(item
);
2192 return dev
->transport
->set_configfs_dev_params(dev
, page
, count
);
2195 static ssize_t
target_dev_alias_show(struct config_item
*item
, char *page
)
2197 struct se_device
*dev
= to_device(item
);
2199 if (!(dev
->dev_flags
& DF_USING_ALIAS
))
2202 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->dev_alias
);
2205 static ssize_t
target_dev_alias_store(struct config_item
*item
,
2206 const char *page
, size_t count
)
2208 struct se_device
*dev
= to_device(item
);
2209 struct se_hba
*hba
= dev
->se_hba
;
2212 if (count
> (SE_DEV_ALIAS_LEN
-1)) {
2213 pr_err("alias count: %d exceeds"
2214 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count
,
2215 SE_DEV_ALIAS_LEN
-1);
2219 read_bytes
= snprintf(&dev
->dev_alias
[0], SE_DEV_ALIAS_LEN
, "%s", page
);
2222 if (dev
->dev_alias
[read_bytes
- 1] == '\n')
2223 dev
->dev_alias
[read_bytes
- 1] = '\0';
2225 dev
->dev_flags
|= DF_USING_ALIAS
;
2227 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2228 config_item_name(&hba
->hba_group
.cg_item
),
2229 config_item_name(&dev
->dev_group
.cg_item
),
2235 static ssize_t
target_dev_udev_path_show(struct config_item
*item
, char *page
)
2237 struct se_device
*dev
= to_device(item
);
2239 if (!(dev
->dev_flags
& DF_USING_UDEV_PATH
))
2242 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->udev_path
);
2245 static ssize_t
target_dev_udev_path_store(struct config_item
*item
,
2246 const char *page
, size_t count
)
2248 struct se_device
*dev
= to_device(item
);
2249 struct se_hba
*hba
= dev
->se_hba
;
2252 if (count
> (SE_UDEV_PATH_LEN
-1)) {
2253 pr_err("udev_path count: %d exceeds"
2254 " SE_UDEV_PATH_LEN-1: %u\n", (int)count
,
2255 SE_UDEV_PATH_LEN
-1);
2259 read_bytes
= snprintf(&dev
->udev_path
[0], SE_UDEV_PATH_LEN
,
2263 if (dev
->udev_path
[read_bytes
- 1] == '\n')
2264 dev
->udev_path
[read_bytes
- 1] = '\0';
2266 dev
->dev_flags
|= DF_USING_UDEV_PATH
;
2268 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2269 config_item_name(&hba
->hba_group
.cg_item
),
2270 config_item_name(&dev
->dev_group
.cg_item
),
2276 static ssize_t
target_dev_enable_show(struct config_item
*item
, char *page
)
2278 struct se_device
*dev
= to_device(item
);
2280 return snprintf(page
, PAGE_SIZE
, "%d\n", target_dev_configured(dev
));
2283 static ssize_t
target_dev_enable_store(struct config_item
*item
,
2284 const char *page
, size_t count
)
2286 struct se_device
*dev
= to_device(item
);
2290 ptr
= strstr(page
, "1");
2292 pr_err("For dev_enable ops, only valid value"
2297 ret
= target_configure_device(dev
);
2303 static ssize_t
target_dev_alua_lu_gp_show(struct config_item
*item
, char *page
)
2305 struct se_device
*dev
= to_device(item
);
2306 struct config_item
*lu_ci
;
2307 struct t10_alua_lu_gp
*lu_gp
;
2308 struct t10_alua_lu_gp_member
*lu_gp_mem
;
2311 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
2315 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
2316 lu_gp
= lu_gp_mem
->lu_gp
;
2318 lu_ci
= &lu_gp
->lu_gp_group
.cg_item
;
2319 len
+= sprintf(page
, "LU Group Alias: %s\nLU Group ID: %hu\n",
2320 config_item_name(lu_ci
), lu_gp
->lu_gp_id
);
2322 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
2327 static ssize_t
target_dev_alua_lu_gp_store(struct config_item
*item
,
2328 const char *page
, size_t count
)
2330 struct se_device
*dev
= to_device(item
);
2331 struct se_hba
*hba
= dev
->se_hba
;
2332 struct t10_alua_lu_gp
*lu_gp
= NULL
, *lu_gp_new
= NULL
;
2333 struct t10_alua_lu_gp_member
*lu_gp_mem
;
2334 unsigned char buf
[LU_GROUP_NAME_BUF
] = { };
2337 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
2341 if (count
> LU_GROUP_NAME_BUF
) {
2342 pr_err("ALUA LU Group Alias too large!\n");
2345 memcpy(buf
, page
, count
);
2347 * Any ALUA logical unit alias besides "NULL" means we will be
2348 * making a new group association.
2350 if (strcmp(strstrip(buf
), "NULL")) {
2352 * core_alua_get_lu_gp_by_name() will increment reference to
2353 * struct t10_alua_lu_gp. This reference is released with
2354 * core_alua_get_lu_gp_by_name below().
2356 lu_gp_new
= core_alua_get_lu_gp_by_name(strstrip(buf
));
2361 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
2362 lu_gp
= lu_gp_mem
->lu_gp
;
2365 * Clearing an existing lu_gp association, and replacing
2369 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2370 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2372 config_item_name(&hba
->hba_group
.cg_item
),
2373 config_item_name(&dev
->dev_group
.cg_item
),
2374 config_item_name(&lu_gp
->lu_gp_group
.cg_item
),
2377 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
2378 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
2383 * Removing existing association of lu_gp_mem with lu_gp
2385 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
2389 * Associate lu_gp_mem with lu_gp_new.
2391 __core_alua_attach_lu_gp_mem(lu_gp_mem
, lu_gp_new
);
2392 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
2394 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2395 " core/alua/lu_gps/%s, ID: %hu\n",
2396 (move
) ? "Moving" : "Adding",
2397 config_item_name(&hba
->hba_group
.cg_item
),
2398 config_item_name(&dev
->dev_group
.cg_item
),
2399 config_item_name(&lu_gp_new
->lu_gp_group
.cg_item
),
2400 lu_gp_new
->lu_gp_id
);
2402 core_alua_put_lu_gp_from_name(lu_gp_new
);
2406 static ssize_t
target_dev_lba_map_show(struct config_item
*item
, char *page
)
2408 struct se_device
*dev
= to_device(item
);
2409 struct t10_alua_lba_map
*map
;
2410 struct t10_alua_lba_map_member
*mem
;
2415 spin_lock(&dev
->t10_alua
.lba_map_lock
);
2416 if (!list_empty(&dev
->t10_alua
.lba_map_list
))
2417 bl
+= sprintf(b
+ bl
, "%u %u\n",
2418 dev
->t10_alua
.lba_map_segment_size
,
2419 dev
->t10_alua
.lba_map_segment_multiplier
);
2420 list_for_each_entry(map
, &dev
->t10_alua
.lba_map_list
, lba_map_list
) {
2421 bl
+= sprintf(b
+ bl
, "%llu %llu",
2422 map
->lba_map_first_lba
, map
->lba_map_last_lba
);
2423 list_for_each_entry(mem
, &map
->lba_map_mem_list
,
2425 switch (mem
->lba_map_mem_alua_state
) {
2426 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
:
2429 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
:
2432 case ALUA_ACCESS_STATE_STANDBY
:
2435 case ALUA_ACCESS_STATE_UNAVAILABLE
:
2442 bl
+= sprintf(b
+ bl
, " %d:%c",
2443 mem
->lba_map_mem_alua_pg_id
, state
);
2445 bl
+= sprintf(b
+ bl
, "\n");
2447 spin_unlock(&dev
->t10_alua
.lba_map_lock
);
2451 static ssize_t
target_dev_lba_map_store(struct config_item
*item
,
2452 const char *page
, size_t count
)
2454 struct se_device
*dev
= to_device(item
);
2455 struct t10_alua_lba_map
*lba_map
= NULL
;
2456 struct list_head lba_list
;
2457 char *map_entries
, *orig
, *ptr
;
2459 int pg_num
= -1, pg
;
2460 int ret
= 0, num
= 0, pg_id
, alua_state
;
2461 unsigned long start_lba
= -1, end_lba
= -1;
2462 unsigned long segment_size
= -1, segment_mult
= -1;
2464 orig
= map_entries
= kstrdup(page
, GFP_KERNEL
);
2468 INIT_LIST_HEAD(&lba_list
);
2469 while ((ptr
= strsep(&map_entries
, "\n")) != NULL
) {
2474 if (sscanf(ptr
, "%lu %lu\n",
2475 &segment_size
, &segment_mult
) != 2) {
2476 pr_err("Invalid line %d\n", num
);
2483 if (sscanf(ptr
, "%lu %lu", &start_lba
, &end_lba
) != 2) {
2484 pr_err("Invalid line %d\n", num
);
2488 ptr
= strchr(ptr
, ' ');
2490 pr_err("Invalid line %d, missing end lba\n", num
);
2495 ptr
= strchr(ptr
, ' ');
2497 pr_err("Invalid line %d, missing state definitions\n",
2503 lba_map
= core_alua_allocate_lba_map(&lba_list
,
2504 start_lba
, end_lba
);
2505 if (IS_ERR(lba_map
)) {
2506 ret
= PTR_ERR(lba_map
);
2510 while (sscanf(ptr
, "%d:%c", &pg_id
, &state
) == 2) {
2513 alua_state
= ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
;
2516 alua_state
= ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
;
2519 alua_state
= ALUA_ACCESS_STATE_STANDBY
;
2522 alua_state
= ALUA_ACCESS_STATE_UNAVAILABLE
;
2525 pr_err("Invalid ALUA state '%c'\n", state
);
2530 ret
= core_alua_allocate_lba_map_mem(lba_map
,
2533 pr_err("Invalid target descriptor %d:%c "
2539 ptr
= strchr(ptr
, ' ');
2547 else if (pg
!= pg_num
) {
2548 pr_err("Only %d from %d port groups definitions "
2549 "at line %d\n", pg
, pg_num
, num
);
2557 core_alua_free_lba_map(&lba_list
);
2560 core_alua_set_lba_map(dev
, &lba_list
,
2561 segment_size
, segment_mult
);
2566 CONFIGFS_ATTR_RO(target_dev_
, info
);
2567 CONFIGFS_ATTR_WO(target_dev_
, control
);
2568 CONFIGFS_ATTR(target_dev_
, alias
);
2569 CONFIGFS_ATTR(target_dev_
, udev_path
);
2570 CONFIGFS_ATTR(target_dev_
, enable
);
2571 CONFIGFS_ATTR(target_dev_
, alua_lu_gp
);
2572 CONFIGFS_ATTR(target_dev_
, lba_map
);
2574 static struct configfs_attribute
*target_core_dev_attrs
[] = {
2575 &target_dev_attr_info
,
2576 &target_dev_attr_control
,
2577 &target_dev_attr_alias
,
2578 &target_dev_attr_udev_path
,
2579 &target_dev_attr_enable
,
2580 &target_dev_attr_alua_lu_gp
,
2581 &target_dev_attr_lba_map
,
2585 static void target_core_dev_release(struct config_item
*item
)
2587 struct config_group
*dev_cg
= to_config_group(item
);
2588 struct se_device
*dev
=
2589 container_of(dev_cg
, struct se_device
, dev_group
);
2591 target_free_device(dev
);
2595 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2596 * within target_fabric_port_link()
2598 struct configfs_item_operations target_core_dev_item_ops
= {
2599 .release
= target_core_dev_release
,
2602 TB_CIT_SETUP(dev
, &target_core_dev_item_ops
, NULL
, target_core_dev_attrs
);
2604 /* End functions for struct config_item_type tb_dev_cit */
2606 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2608 static inline struct t10_alua_lu_gp
*to_lu_gp(struct config_item
*item
)
2610 return container_of(to_config_group(item
), struct t10_alua_lu_gp
,
2614 static ssize_t
target_lu_gp_lu_gp_id_show(struct config_item
*item
, char *page
)
2616 struct t10_alua_lu_gp
*lu_gp
= to_lu_gp(item
);
2618 if (!lu_gp
->lu_gp_valid_id
)
2620 return sprintf(page
, "%hu\n", lu_gp
->lu_gp_id
);
2623 static ssize_t
target_lu_gp_lu_gp_id_store(struct config_item
*item
,
2624 const char *page
, size_t count
)
2626 struct t10_alua_lu_gp
*lu_gp
= to_lu_gp(item
);
2627 struct config_group
*alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2628 unsigned long lu_gp_id
;
2631 ret
= kstrtoul(page
, 0, &lu_gp_id
);
2633 pr_err("kstrtoul() returned %d for"
2634 " lu_gp_id\n", ret
);
2637 if (lu_gp_id
> 0x0000ffff) {
2638 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2639 " 0x0000ffff\n", lu_gp_id
);
2643 ret
= core_alua_set_lu_gp_id(lu_gp
, (u16
)lu_gp_id
);
2647 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2648 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2649 config_item_name(&alua_lu_gp_cg
->cg_item
),
2655 static ssize_t
target_lu_gp_members_show(struct config_item
*item
, char *page
)
2657 struct t10_alua_lu_gp
*lu_gp
= to_lu_gp(item
);
2658 struct se_device
*dev
;
2660 struct t10_alua_lu_gp_member
*lu_gp_mem
;
2661 ssize_t len
= 0, cur_len
;
2662 unsigned char buf
[LU_GROUP_NAME_BUF
] = { };
2664 spin_lock(&lu_gp
->lu_gp_lock
);
2665 list_for_each_entry(lu_gp_mem
, &lu_gp
->lu_gp_mem_list
, lu_gp_mem_list
) {
2666 dev
= lu_gp_mem
->lu_gp_mem_dev
;
2669 cur_len
= snprintf(buf
, LU_GROUP_NAME_BUF
, "%s/%s\n",
2670 config_item_name(&hba
->hba_group
.cg_item
),
2671 config_item_name(&dev
->dev_group
.cg_item
));
2672 cur_len
++; /* Extra byte for NULL terminator */
2674 if ((cur_len
+ len
) > PAGE_SIZE
) {
2675 pr_warn("Ran out of lu_gp_show_attr"
2676 "_members buffer\n");
2679 memcpy(page
+len
, buf
, cur_len
);
2682 spin_unlock(&lu_gp
->lu_gp_lock
);
2687 CONFIGFS_ATTR(target_lu_gp_
, lu_gp_id
);
2688 CONFIGFS_ATTR_RO(target_lu_gp_
, members
);
2690 static struct configfs_attribute
*target_core_alua_lu_gp_attrs
[] = {
2691 &target_lu_gp_attr_lu_gp_id
,
2692 &target_lu_gp_attr_members
,
2696 static void target_core_alua_lu_gp_release(struct config_item
*item
)
2698 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2699 struct t10_alua_lu_gp
, lu_gp_group
);
2701 core_alua_free_lu_gp(lu_gp
);
2704 static struct configfs_item_operations target_core_alua_lu_gp_ops
= {
2705 .release
= target_core_alua_lu_gp_release
,
2708 static const struct config_item_type target_core_alua_lu_gp_cit
= {
2709 .ct_item_ops
= &target_core_alua_lu_gp_ops
,
2710 .ct_attrs
= target_core_alua_lu_gp_attrs
,
2711 .ct_owner
= THIS_MODULE
,
2714 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2716 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2718 static struct config_group
*target_core_alua_create_lu_gp(
2719 struct config_group
*group
,
2722 struct t10_alua_lu_gp
*lu_gp
;
2723 struct config_group
*alua_lu_gp_cg
= NULL
;
2724 struct config_item
*alua_lu_gp_ci
= NULL
;
2726 lu_gp
= core_alua_allocate_lu_gp(name
, 0);
2730 alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2731 alua_lu_gp_ci
= &alua_lu_gp_cg
->cg_item
;
2733 config_group_init_type_name(alua_lu_gp_cg
, name
,
2734 &target_core_alua_lu_gp_cit
);
2736 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2737 " Group: core/alua/lu_gps/%s\n",
2738 config_item_name(alua_lu_gp_ci
));
2740 return alua_lu_gp_cg
;
2744 static void target_core_alua_drop_lu_gp(
2745 struct config_group
*group
,
2746 struct config_item
*item
)
2748 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2749 struct t10_alua_lu_gp
, lu_gp_group
);
2751 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2752 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2753 config_item_name(item
), lu_gp
->lu_gp_id
);
2755 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2756 * -> target_core_alua_lu_gp_release()
2758 config_item_put(item
);
2761 static struct configfs_group_operations target_core_alua_lu_gps_group_ops
= {
2762 .make_group
= &target_core_alua_create_lu_gp
,
2763 .drop_item
= &target_core_alua_drop_lu_gp
,
2766 static const struct config_item_type target_core_alua_lu_gps_cit
= {
2767 .ct_item_ops
= NULL
,
2768 .ct_group_ops
= &target_core_alua_lu_gps_group_ops
,
2769 .ct_owner
= THIS_MODULE
,
2772 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2774 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2776 static inline struct t10_alua_tg_pt_gp
*to_tg_pt_gp(struct config_item
*item
)
2778 return container_of(to_config_group(item
), struct t10_alua_tg_pt_gp
,
2782 static ssize_t
target_tg_pt_gp_alua_access_state_show(struct config_item
*item
,
2785 return sprintf(page
, "%d\n",
2786 to_tg_pt_gp(item
)->tg_pt_gp_alua_access_state
);
2789 static ssize_t
target_tg_pt_gp_alua_access_state_store(struct config_item
*item
,
2790 const char *page
, size_t count
)
2792 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2793 struct se_device
*dev
= tg_pt_gp
->tg_pt_gp_dev
;
2797 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2798 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2801 if (!target_dev_configured(dev
)) {
2802 pr_err("Unable to set alua_access_state while device is"
2803 " not configured\n");
2807 ret
= kstrtoul(page
, 0, &tmp
);
2809 pr_err("Unable to extract new ALUA access state from"
2813 new_state
= (int)tmp
;
2815 if (!(tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_IMPLICIT_ALUA
)) {
2816 pr_err("Unable to process implicit configfs ALUA"
2817 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2820 if (tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_EXPLICIT_ALUA
&&
2821 new_state
== ALUA_ACCESS_STATE_LBA_DEPENDENT
) {
2822 /* LBA DEPENDENT is only allowed with implicit ALUA */
2823 pr_err("Unable to process implicit configfs ALUA transition"
2824 " while explicit ALUA management is enabled\n");
2828 ret
= core_alua_do_port_transition(tg_pt_gp
, dev
,
2829 NULL
, NULL
, new_state
, 0);
2830 return (!ret
) ? count
: -EINVAL
;
2833 static ssize_t
target_tg_pt_gp_alua_access_status_show(struct config_item
*item
,
2836 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2837 return sprintf(page
, "%s\n",
2838 core_alua_dump_status(tg_pt_gp
->tg_pt_gp_alua_access_status
));
2841 static ssize_t
target_tg_pt_gp_alua_access_status_store(
2842 struct config_item
*item
, const char *page
, size_t count
)
2844 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2846 int new_status
, ret
;
2848 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2849 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2853 ret
= kstrtoul(page
, 0, &tmp
);
2855 pr_err("Unable to extract new ALUA access status"
2856 " from %s\n", page
);
2859 new_status
= (int)tmp
;
2861 if ((new_status
!= ALUA_STATUS_NONE
) &&
2862 (new_status
!= ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG
) &&
2863 (new_status
!= ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA
)) {
2864 pr_err("Illegal ALUA access status: 0x%02x\n",
2869 tg_pt_gp
->tg_pt_gp_alua_access_status
= new_status
;
2873 static ssize_t
target_tg_pt_gp_alua_access_type_show(struct config_item
*item
,
2876 return core_alua_show_access_type(to_tg_pt_gp(item
), page
);
2879 static ssize_t
target_tg_pt_gp_alua_access_type_store(struct config_item
*item
,
2880 const char *page
, size_t count
)
2882 return core_alua_store_access_type(to_tg_pt_gp(item
), page
, count
);
2885 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2886 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2887 struct config_item *item, char *p) \
2889 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2890 return sprintf(p, "%d\n", \
2891 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2894 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2895 struct config_item *item, const char *p, size_t c) \
2897 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2898 unsigned long tmp; \
2901 if (!t->tg_pt_gp_valid_id) { \
2902 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2906 ret = kstrtoul(p, 0, &tmp); \
2908 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2912 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2916 t->tg_pt_gp_alua_supported_states |= _bit; \
2918 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2923 ALUA_SUPPORTED_STATE_ATTR(transitioning
, ALUA_T_SUP
);
2924 ALUA_SUPPORTED_STATE_ATTR(offline
, ALUA_O_SUP
);
2925 ALUA_SUPPORTED_STATE_ATTR(lba_dependent
, ALUA_LBD_SUP
);
2926 ALUA_SUPPORTED_STATE_ATTR(unavailable
, ALUA_U_SUP
);
2927 ALUA_SUPPORTED_STATE_ATTR(standby
, ALUA_S_SUP
);
2928 ALUA_SUPPORTED_STATE_ATTR(active_optimized
, ALUA_AO_SUP
);
2929 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized
, ALUA_AN_SUP
);
2931 static ssize_t
target_tg_pt_gp_alua_write_metadata_show(
2932 struct config_item
*item
, char *page
)
2934 return sprintf(page
, "%d\n",
2935 to_tg_pt_gp(item
)->tg_pt_gp_write_metadata
);
2938 static ssize_t
target_tg_pt_gp_alua_write_metadata_store(
2939 struct config_item
*item
, const char *page
, size_t count
)
2941 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2945 ret
= kstrtoul(page
, 0, &tmp
);
2947 pr_err("Unable to extract alua_write_metadata\n");
2951 if ((tmp
!= 0) && (tmp
!= 1)) {
2952 pr_err("Illegal value for alua_write_metadata:"
2956 tg_pt_gp
->tg_pt_gp_write_metadata
= (int)tmp
;
2961 static ssize_t
target_tg_pt_gp_nonop_delay_msecs_show(struct config_item
*item
,
2964 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item
), page
);
2967 static ssize_t
target_tg_pt_gp_nonop_delay_msecs_store(struct config_item
*item
,
2968 const char *page
, size_t count
)
2970 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item
), page
,
2974 static ssize_t
target_tg_pt_gp_trans_delay_msecs_show(struct config_item
*item
,
2977 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item
), page
);
2980 static ssize_t
target_tg_pt_gp_trans_delay_msecs_store(struct config_item
*item
,
2981 const char *page
, size_t count
)
2983 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item
), page
,
2987 static ssize_t
target_tg_pt_gp_implicit_trans_secs_show(
2988 struct config_item
*item
, char *page
)
2990 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item
), page
);
2993 static ssize_t
target_tg_pt_gp_implicit_trans_secs_store(
2994 struct config_item
*item
, const char *page
, size_t count
)
2996 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item
), page
,
3000 static ssize_t
target_tg_pt_gp_preferred_show(struct config_item
*item
,
3003 return core_alua_show_preferred_bit(to_tg_pt_gp(item
), page
);
3006 static ssize_t
target_tg_pt_gp_preferred_store(struct config_item
*item
,
3007 const char *page
, size_t count
)
3009 return core_alua_store_preferred_bit(to_tg_pt_gp(item
), page
, count
);
3012 static ssize_t
target_tg_pt_gp_tg_pt_gp_id_show(struct config_item
*item
,
3015 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
3017 if (!tg_pt_gp
->tg_pt_gp_valid_id
)
3019 return sprintf(page
, "%hu\n", tg_pt_gp
->tg_pt_gp_id
);
3022 static ssize_t
target_tg_pt_gp_tg_pt_gp_id_store(struct config_item
*item
,
3023 const char *page
, size_t count
)
3025 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
3026 struct config_group
*alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
3027 unsigned long tg_pt_gp_id
;
3030 ret
= kstrtoul(page
, 0, &tg_pt_gp_id
);
3032 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3036 if (tg_pt_gp_id
> 0x0000ffff) {
3037 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3042 ret
= core_alua_set_tg_pt_gp_id(tg_pt_gp
, (u16
)tg_pt_gp_id
);
3046 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3047 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3048 config_item_name(&alua_tg_pt_gp_cg
->cg_item
),
3049 tg_pt_gp
->tg_pt_gp_id
);
3054 static ssize_t
target_tg_pt_gp_members_show(struct config_item
*item
,
3057 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
3059 ssize_t len
= 0, cur_len
;
3060 unsigned char buf
[TG_PT_GROUP_NAME_BUF
] = { };
3062 spin_lock(&tg_pt_gp
->tg_pt_gp_lock
);
3063 list_for_each_entry(lun
, &tg_pt_gp
->tg_pt_gp_lun_list
,
3064 lun_tg_pt_gp_link
) {
3065 struct se_portal_group
*tpg
= lun
->lun_tpg
;
3067 cur_len
= snprintf(buf
, TG_PT_GROUP_NAME_BUF
, "%s/%s/tpgt_%hu"
3068 "/%s\n", tpg
->se_tpg_tfo
->fabric_name
,
3069 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
),
3070 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
3071 config_item_name(&lun
->lun_group
.cg_item
));
3072 cur_len
++; /* Extra byte for NULL terminator */
3074 if ((cur_len
+ len
) > PAGE_SIZE
) {
3075 pr_warn("Ran out of lu_gp_show_attr"
3076 "_members buffer\n");
3079 memcpy(page
+len
, buf
, cur_len
);
3082 spin_unlock(&tg_pt_gp
->tg_pt_gp_lock
);
3087 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_access_state
);
3088 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_access_status
);
3089 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_access_type
);
3090 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_transitioning
);
3091 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_offline
);
3092 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_lba_dependent
);
3093 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_unavailable
);
3094 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_standby
);
3095 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_active_optimized
);
3096 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_active_nonoptimized
);
3097 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_write_metadata
);
3098 CONFIGFS_ATTR(target_tg_pt_gp_
, nonop_delay_msecs
);
3099 CONFIGFS_ATTR(target_tg_pt_gp_
, trans_delay_msecs
);
3100 CONFIGFS_ATTR(target_tg_pt_gp_
, implicit_trans_secs
);
3101 CONFIGFS_ATTR(target_tg_pt_gp_
, preferred
);
3102 CONFIGFS_ATTR(target_tg_pt_gp_
, tg_pt_gp_id
);
3103 CONFIGFS_ATTR_RO(target_tg_pt_gp_
, members
);
3105 static struct configfs_attribute
*target_core_alua_tg_pt_gp_attrs
[] = {
3106 &target_tg_pt_gp_attr_alua_access_state
,
3107 &target_tg_pt_gp_attr_alua_access_status
,
3108 &target_tg_pt_gp_attr_alua_access_type
,
3109 &target_tg_pt_gp_attr_alua_support_transitioning
,
3110 &target_tg_pt_gp_attr_alua_support_offline
,
3111 &target_tg_pt_gp_attr_alua_support_lba_dependent
,
3112 &target_tg_pt_gp_attr_alua_support_unavailable
,
3113 &target_tg_pt_gp_attr_alua_support_standby
,
3114 &target_tg_pt_gp_attr_alua_support_active_nonoptimized
,
3115 &target_tg_pt_gp_attr_alua_support_active_optimized
,
3116 &target_tg_pt_gp_attr_alua_write_metadata
,
3117 &target_tg_pt_gp_attr_nonop_delay_msecs
,
3118 &target_tg_pt_gp_attr_trans_delay_msecs
,
3119 &target_tg_pt_gp_attr_implicit_trans_secs
,
3120 &target_tg_pt_gp_attr_preferred
,
3121 &target_tg_pt_gp_attr_tg_pt_gp_id
,
3122 &target_tg_pt_gp_attr_members
,
3126 static void target_core_alua_tg_pt_gp_release(struct config_item
*item
)
3128 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
3129 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
3131 core_alua_free_tg_pt_gp(tg_pt_gp
);
3134 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops
= {
3135 .release
= target_core_alua_tg_pt_gp_release
,
3138 static const struct config_item_type target_core_alua_tg_pt_gp_cit
= {
3139 .ct_item_ops
= &target_core_alua_tg_pt_gp_ops
,
3140 .ct_attrs
= target_core_alua_tg_pt_gp_attrs
,
3141 .ct_owner
= THIS_MODULE
,
3144 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3146 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3148 static struct config_group
*target_core_alua_create_tg_pt_gp(
3149 struct config_group
*group
,
3152 struct t10_alua
*alua
= container_of(group
, struct t10_alua
,
3153 alua_tg_pt_gps_group
);
3154 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
3155 struct config_group
*alua_tg_pt_gp_cg
= NULL
;
3156 struct config_item
*alua_tg_pt_gp_ci
= NULL
;
3158 tg_pt_gp
= core_alua_allocate_tg_pt_gp(alua
->t10_dev
, name
, 0);
3162 alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
3163 alua_tg_pt_gp_ci
= &alua_tg_pt_gp_cg
->cg_item
;
3165 config_group_init_type_name(alua_tg_pt_gp_cg
, name
,
3166 &target_core_alua_tg_pt_gp_cit
);
3168 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3169 " Group: alua/tg_pt_gps/%s\n",
3170 config_item_name(alua_tg_pt_gp_ci
));
3172 return alua_tg_pt_gp_cg
;
3175 static void target_core_alua_drop_tg_pt_gp(
3176 struct config_group
*group
,
3177 struct config_item
*item
)
3179 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
3180 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
3182 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3183 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3184 config_item_name(item
), tg_pt_gp
->tg_pt_gp_id
);
3186 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3187 * -> target_core_alua_tg_pt_gp_release().
3189 config_item_put(item
);
3192 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops
= {
3193 .make_group
= &target_core_alua_create_tg_pt_gp
,
3194 .drop_item
= &target_core_alua_drop_tg_pt_gp
,
3197 TB_CIT_SETUP(dev_alua_tg_pt_gps
, NULL
, &target_core_alua_tg_pt_gps_group_ops
, NULL
);
3199 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3201 /* Start functions for struct config_item_type target_core_alua_cit */
3204 * target_core_alua_cit is a ConfigFS group that lives under
3205 * /sys/kernel/config/target/core/alua. There are default groups
3206 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3207 * target_core_alua_cit in target_core_init_configfs() below.
3209 static const struct config_item_type target_core_alua_cit
= {
3210 .ct_item_ops
= NULL
,
3212 .ct_owner
= THIS_MODULE
,
3215 /* End functions for struct config_item_type target_core_alua_cit */
3217 /* Start functions for struct config_item_type tb_dev_stat_cit */
3219 static struct config_group
*target_core_stat_mkdir(
3220 struct config_group
*group
,
3223 return ERR_PTR(-ENOSYS
);
3226 static void target_core_stat_rmdir(
3227 struct config_group
*group
,
3228 struct config_item
*item
)
3233 static struct configfs_group_operations target_core_stat_group_ops
= {
3234 .make_group
= &target_core_stat_mkdir
,
3235 .drop_item
= &target_core_stat_rmdir
,
3238 TB_CIT_SETUP(dev_stat
, NULL
, &target_core_stat_group_ops
, NULL
);
3240 /* End functions for struct config_item_type tb_dev_stat_cit */
3242 /* Start functions for struct config_item_type target_core_hba_cit */
3244 static struct config_group
*target_core_make_subdev(
3245 struct config_group
*group
,
3248 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
3249 struct config_item
*hba_ci
= &group
->cg_item
;
3250 struct se_hba
*hba
= item_to_hba(hba_ci
);
3251 struct target_backend
*tb
= hba
->backend
;
3252 struct se_device
*dev
;
3253 int errno
= -ENOMEM
, ret
;
3255 ret
= mutex_lock_interruptible(&hba
->hba_access_mutex
);
3257 return ERR_PTR(ret
);
3259 dev
= target_alloc_device(hba
, name
);
3263 config_group_init_type_name(&dev
->dev_group
, name
, &tb
->tb_dev_cit
);
3265 config_group_init_type_name(&dev
->dev_action_group
, "action",
3266 &tb
->tb_dev_action_cit
);
3267 configfs_add_default_group(&dev
->dev_action_group
, &dev
->dev_group
);
3269 config_group_init_type_name(&dev
->dev_attrib
.da_group
, "attrib",
3270 &tb
->tb_dev_attrib_cit
);
3271 configfs_add_default_group(&dev
->dev_attrib
.da_group
, &dev
->dev_group
);
3273 config_group_init_type_name(&dev
->dev_pr_group
, "pr",
3274 &tb
->tb_dev_pr_cit
);
3275 configfs_add_default_group(&dev
->dev_pr_group
, &dev
->dev_group
);
3277 config_group_init_type_name(&dev
->t10_wwn
.t10_wwn_group
, "wwn",
3278 &tb
->tb_dev_wwn_cit
);
3279 configfs_add_default_group(&dev
->t10_wwn
.t10_wwn_group
,
3282 config_group_init_type_name(&dev
->t10_alua
.alua_tg_pt_gps_group
,
3283 "alua", &tb
->tb_dev_alua_tg_pt_gps_cit
);
3284 configfs_add_default_group(&dev
->t10_alua
.alua_tg_pt_gps_group
,
3287 config_group_init_type_name(&dev
->dev_stat_grps
.stat_group
,
3288 "statistics", &tb
->tb_dev_stat_cit
);
3289 configfs_add_default_group(&dev
->dev_stat_grps
.stat_group
,
3293 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3295 tg_pt_gp
= core_alua_allocate_tg_pt_gp(dev
, "default_tg_pt_gp", 1);
3297 goto out_free_device
;
3298 dev
->t10_alua
.default_tg_pt_gp
= tg_pt_gp
;
3300 config_group_init_type_name(&tg_pt_gp
->tg_pt_gp_group
,
3301 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit
);
3302 configfs_add_default_group(&tg_pt_gp
->tg_pt_gp_group
,
3303 &dev
->t10_alua
.alua_tg_pt_gps_group
);
3306 * Add core/$HBA/$DEV/statistics/ default groups
3308 target_stat_setup_dev_default_groups(dev
);
3310 mutex_unlock(&hba
->hba_access_mutex
);
3311 return &dev
->dev_group
;
3314 target_free_device(dev
);
3316 mutex_unlock(&hba
->hba_access_mutex
);
3317 return ERR_PTR(errno
);
3320 static void target_core_drop_subdev(
3321 struct config_group
*group
,
3322 struct config_item
*item
)
3324 struct config_group
*dev_cg
= to_config_group(item
);
3325 struct se_device
*dev
=
3326 container_of(dev_cg
, struct se_device
, dev_group
);
3329 hba
= item_to_hba(&dev
->se_hba
->hba_group
.cg_item
);
3331 mutex_lock(&hba
->hba_access_mutex
);
3333 configfs_remove_default_groups(&dev
->dev_stat_grps
.stat_group
);
3334 configfs_remove_default_groups(&dev
->t10_alua
.alua_tg_pt_gps_group
);
3337 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3338 * directly from target_core_alua_tg_pt_gp_release().
3340 dev
->t10_alua
.default_tg_pt_gp
= NULL
;
3342 configfs_remove_default_groups(dev_cg
);
3345 * se_dev is released from target_core_dev_item_ops->release()
3347 config_item_put(item
);
3348 mutex_unlock(&hba
->hba_access_mutex
);
3351 static struct configfs_group_operations target_core_hba_group_ops
= {
3352 .make_group
= target_core_make_subdev
,
3353 .drop_item
= target_core_drop_subdev
,
3357 static inline struct se_hba
*to_hba(struct config_item
*item
)
3359 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
3362 static ssize_t
target_hba_info_show(struct config_item
*item
, char *page
)
3364 struct se_hba
*hba
= to_hba(item
);
3366 return sprintf(page
, "HBA Index: %d plugin: %s version: %s\n",
3367 hba
->hba_id
, hba
->backend
->ops
->name
,
3368 TARGET_CORE_VERSION
);
3371 static ssize_t
target_hba_mode_show(struct config_item
*item
, char *page
)
3373 struct se_hba
*hba
= to_hba(item
);
3376 if (hba
->hba_flags
& HBA_FLAGS_PSCSI_MODE
)
3379 return sprintf(page
, "%d\n", hba_mode
);
3382 static ssize_t
target_hba_mode_store(struct config_item
*item
,
3383 const char *page
, size_t count
)
3385 struct se_hba
*hba
= to_hba(item
);
3386 unsigned long mode_flag
;
3389 if (hba
->backend
->ops
->pmode_enable_hba
== NULL
)
3392 ret
= kstrtoul(page
, 0, &mode_flag
);
3394 pr_err("Unable to extract hba mode flag: %d\n", ret
);
3398 if (hba
->dev_count
) {
3399 pr_err("Unable to set hba_mode with active devices\n");
3403 ret
= hba
->backend
->ops
->pmode_enable_hba(hba
, mode_flag
);
3407 hba
->hba_flags
|= HBA_FLAGS_PSCSI_MODE
;
3409 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
3414 CONFIGFS_ATTR_RO(target_
, hba_info
);
3415 CONFIGFS_ATTR(target_
, hba_mode
);
3417 static void target_core_hba_release(struct config_item
*item
)
3419 struct se_hba
*hba
= container_of(to_config_group(item
),
3420 struct se_hba
, hba_group
);
3421 core_delete_hba(hba
);
3424 static struct configfs_attribute
*target_core_hba_attrs
[] = {
3425 &target_attr_hba_info
,
3426 &target_attr_hba_mode
,
3430 static struct configfs_item_operations target_core_hba_item_ops
= {
3431 .release
= target_core_hba_release
,
3434 static const struct config_item_type target_core_hba_cit
= {
3435 .ct_item_ops
= &target_core_hba_item_ops
,
3436 .ct_group_ops
= &target_core_hba_group_ops
,
3437 .ct_attrs
= target_core_hba_attrs
,
3438 .ct_owner
= THIS_MODULE
,
3441 static struct config_group
*target_core_call_addhbatotarget(
3442 struct config_group
*group
,
3445 char *se_plugin_str
, *str
, *str2
;
3447 char buf
[TARGET_CORE_NAME_MAX_LEN
] = { };
3448 unsigned long plugin_dep_id
= 0;
3451 if (strlen(name
) >= TARGET_CORE_NAME_MAX_LEN
) {
3452 pr_err("Passed *name strlen(): %d exceeds"
3453 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name
),
3454 TARGET_CORE_NAME_MAX_LEN
);
3455 return ERR_PTR(-ENAMETOOLONG
);
3457 snprintf(buf
, TARGET_CORE_NAME_MAX_LEN
, "%s", name
);
3459 str
= strstr(buf
, "_");
3461 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3462 return ERR_PTR(-EINVAL
);
3464 se_plugin_str
= buf
;
3466 * Special case for subsystem plugins that have "_" in their names.
3467 * Namely rd_direct and rd_mcp..
3469 str2
= strstr(str
+1, "_");
3471 *str2
= '\0'; /* Terminate for *se_plugin_str */
3472 str2
++; /* Skip to start of plugin dependent ID */
3475 *str
= '\0'; /* Terminate for *se_plugin_str */
3476 str
++; /* Skip to start of plugin dependent ID */
3479 ret
= kstrtoul(str
, 0, &plugin_dep_id
);
3481 pr_err("kstrtoul() returned %d for"
3482 " plugin_dep_id\n", ret
);
3483 return ERR_PTR(ret
);
3486 * Load up TCM subsystem plugins if they have not already been loaded.
3488 transport_subsystem_check_init();
3490 hba
= core_alloc_hba(se_plugin_str
, plugin_dep_id
, 0);
3492 return ERR_CAST(hba
);
3494 config_group_init_type_name(&hba
->hba_group
, name
,
3495 &target_core_hba_cit
);
3497 return &hba
->hba_group
;
3500 static void target_core_call_delhbafromtarget(
3501 struct config_group
*group
,
3502 struct config_item
*item
)
3505 * core_delete_hba() is called from target_core_hba_item_ops->release()
3506 * -> target_core_hba_release()
3508 config_item_put(item
);
3511 static struct configfs_group_operations target_core_group_ops
= {
3512 .make_group
= target_core_call_addhbatotarget
,
3513 .drop_item
= target_core_call_delhbafromtarget
,
3516 static const struct config_item_type target_core_cit
= {
3517 .ct_item_ops
= NULL
,
3518 .ct_group_ops
= &target_core_group_ops
,
3520 .ct_owner
= THIS_MODULE
,
3523 /* Stop functions for struct config_item_type target_core_hba_cit */
3525 void target_setup_backend_cits(struct target_backend
*tb
)
3527 target_core_setup_dev_cit(tb
);
3528 target_core_setup_dev_action_cit(tb
);
3529 target_core_setup_dev_attrib_cit(tb
);
3530 target_core_setup_dev_pr_cit(tb
);
3531 target_core_setup_dev_wwn_cit(tb
);
3532 target_core_setup_dev_alua_tg_pt_gps_cit(tb
);
3533 target_core_setup_dev_stat_cit(tb
);
3536 static void target_init_dbroot(void)
3540 snprintf(db_root_stage
, DB_ROOT_LEN
, DB_ROOT_PREFERRED
);
3541 fp
= filp_open(db_root_stage
, O_RDONLY
, 0);
3543 pr_err("db_root: cannot open: %s\n", db_root_stage
);
3546 if (!S_ISDIR(file_inode(fp
)->i_mode
)) {
3547 filp_close(fp
, NULL
);
3548 pr_err("db_root: not a valid directory: %s\n", db_root_stage
);
3551 filp_close(fp
, NULL
);
3553 strncpy(db_root
, db_root_stage
, DB_ROOT_LEN
);
3554 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root
);
3557 static int __init
target_core_init_configfs(void)
3559 struct configfs_subsystem
*subsys
= &target_core_fabrics
;
3560 struct t10_alua_lu_gp
*lu_gp
;
3563 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3564 " Engine: %s on %s/%s on "UTS_RELEASE
"\n",
3565 TARGET_CORE_VERSION
, utsname()->sysname
, utsname()->machine
);
3567 config_group_init(&subsys
->su_group
);
3568 mutex_init(&subsys
->su_mutex
);
3570 ret
= init_se_kmem_caches();
3574 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3575 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3577 config_group_init_type_name(&target_core_hbagroup
, "core",
3579 configfs_add_default_group(&target_core_hbagroup
, &subsys
->su_group
);
3582 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3584 config_group_init_type_name(&alua_group
, "alua", &target_core_alua_cit
);
3585 configfs_add_default_group(&alua_group
, &target_core_hbagroup
);
3588 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3589 * groups under /sys/kernel/config/target/core/alua/
3591 config_group_init_type_name(&alua_lu_gps_group
, "lu_gps",
3592 &target_core_alua_lu_gps_cit
);
3593 configfs_add_default_group(&alua_lu_gps_group
, &alua_group
);
3596 * Add core/alua/lu_gps/default_lu_gp
3598 lu_gp
= core_alua_allocate_lu_gp("default_lu_gp", 1);
3599 if (IS_ERR(lu_gp
)) {
3604 config_group_init_type_name(&lu_gp
->lu_gp_group
, "default_lu_gp",
3605 &target_core_alua_lu_gp_cit
);
3606 configfs_add_default_group(&lu_gp
->lu_gp_group
, &alua_lu_gps_group
);
3608 default_lu_gp
= lu_gp
;
3611 * Register the target_core_mod subsystem with configfs.
3613 ret
= configfs_register_subsystem(subsys
);
3615 pr_err("Error %d while registering subsystem %s\n",
3616 ret
, subsys
->su_group
.cg_item
.ci_namebuf
);
3619 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3620 " Infrastructure: "TARGET_CORE_VERSION
" on %s/%s"
3621 " on "UTS_RELEASE
"\n", utsname()->sysname
, utsname()->machine
);
3623 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3625 ret
= rd_module_init();
3629 ret
= core_dev_setup_virtual_lun0();
3633 ret
= target_xcopy_setup_pt();
3637 target_init_dbroot();
3642 configfs_unregister_subsystem(subsys
);
3643 core_dev_release_virtual_lun0();
3646 if (default_lu_gp
) {
3647 core_alua_free_lu_gp(default_lu_gp
);
3648 default_lu_gp
= NULL
;
3650 release_se_kmem_caches();
3654 static void __exit
target_core_exit_configfs(void)
3656 configfs_remove_default_groups(&alua_lu_gps_group
);
3657 configfs_remove_default_groups(&alua_group
);
3658 configfs_remove_default_groups(&target_core_hbagroup
);
3661 * We expect subsys->su_group.default_groups to be released
3662 * by configfs subsystem provider logic..
3664 configfs_unregister_subsystem(&target_core_fabrics
);
3666 core_alua_free_lu_gp(default_lu_gp
);
3667 default_lu_gp
= NULL
;
3669 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3670 " Infrastructure\n");
3672 core_dev_release_virtual_lun0();
3674 target_xcopy_release_pt();
3675 release_se_kmem_caches();
3678 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3679 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3680 MODULE_LICENSE("GPL");
3682 module_init(target_core_init_configfs
);
3683 module_exit(target_core_exit_configfs
);