1 /*******************************************************************************
2 * Filename: target_core_configfs.c
4 * This file contains ConfigFS logic for the Generic Target Engine project.
6 * (c) Copyright 2008-2013 Datera, Inc.
8 * Nicholas A. Bellinger <nab@kernel.org>
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43 #include <target/target_core_fabric_configfs.h>
44 #include <target/configfs_macros.h>
46 #include "target_core_internal.h"
47 #include "target_core_alua.h"
48 #include "target_core_pr.h"
49 #include "target_core_rd.h"
50 #include "target_core_xcopy.h"
52 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
53 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
55 struct config_item_type *cit = &tb->tb_##_name##_cit; \
57 cit->ct_item_ops = _item_ops; \
58 cit->ct_group_ops = _group_ops; \
59 cit->ct_attrs = _attrs; \
60 cit->ct_owner = tb->ops->owner; \
61 pr_debug("Setup generic %s\n", __stringify(_name)); \
64 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
65 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
67 struct config_item_type *cit = &tb->tb_##_name##_cit; \
69 cit->ct_item_ops = _item_ops; \
70 cit->ct_group_ops = _group_ops; \
71 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
72 cit->ct_owner = tb->ops->owner; \
73 pr_debug("Setup generic %s\n", __stringify(_name)); \
76 extern struct t10_alua_lu_gp
*default_lu_gp
;
78 static LIST_HEAD(g_tf_list
);
79 static DEFINE_MUTEX(g_tf_lock
);
81 struct target_core_configfs_attribute
{
82 struct configfs_attribute attr
;
83 ssize_t (*show
)(void *, char *);
84 ssize_t (*store
)(void *, const char *, size_t);
87 static struct config_group target_core_hbagroup
;
88 static struct config_group alua_group
;
89 static struct config_group alua_lu_gps_group
;
91 static inline struct se_hba
*
92 item_to_hba(struct config_item
*item
)
94 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
98 * Attributes for /sys/kernel/config/target/
100 static ssize_t
target_core_attr_show(struct config_item
*item
,
101 struct configfs_attribute
*attr
,
104 return sprintf(page
, "Target Engine Core ConfigFS Infrastructure %s"
105 " on %s/%s on "UTS_RELEASE
"\n", TARGET_CORE_VERSION
,
106 utsname()->sysname
, utsname()->machine
);
109 static struct configfs_item_operations target_core_fabric_item_ops
= {
110 .show_attribute
= target_core_attr_show
,
113 static struct configfs_attribute target_core_item_attr_version
= {
114 .ca_owner
= THIS_MODULE
,
115 .ca_name
= "version",
119 static struct target_fabric_configfs
*target_core_get_fabric(
122 struct target_fabric_configfs
*tf
;
127 mutex_lock(&g_tf_lock
);
128 list_for_each_entry(tf
, &g_tf_list
, tf_list
) {
129 if (!strcmp(tf
->tf_ops
->name
, name
)) {
130 atomic_inc(&tf
->tf_access_cnt
);
131 mutex_unlock(&g_tf_lock
);
135 mutex_unlock(&g_tf_lock
);
141 * Called from struct target_core_group_ops->make_group()
143 static struct config_group
*target_core_register_fabric(
144 struct config_group
*group
,
147 struct target_fabric_configfs
*tf
;
150 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
151 " %s\n", group
, name
);
153 tf
= target_core_get_fabric(name
);
155 pr_debug("target_core_register_fabric() trying autoload for %s\n",
159 * Below are some hardcoded request_module() calls to automatically
160 * local fabric modules when the following is called:
162 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
164 * Note that this does not limit which TCM fabric module can be
165 * registered, but simply provids auto loading logic for modules with
166 * mkdir(2) system calls with known TCM fabric modules.
169 if (!strncmp(name
, "iscsi", 5)) {
171 * Automatically load the LIO Target fabric module when the
172 * following is called:
174 * mkdir -p $CONFIGFS/target/iscsi
176 ret
= request_module("iscsi_target_mod");
178 pr_debug("request_module() failed for"
179 " iscsi_target_mod.ko: %d\n", ret
);
180 return ERR_PTR(-EINVAL
);
182 } else if (!strncmp(name
, "loopback", 8)) {
184 * Automatically load the tcm_loop fabric module when the
185 * following is called:
187 * mkdir -p $CONFIGFS/target/loopback
189 ret
= request_module("tcm_loop");
191 pr_debug("request_module() failed for"
192 " tcm_loop.ko: %d\n", ret
);
193 return ERR_PTR(-EINVAL
);
197 tf
= target_core_get_fabric(name
);
201 pr_debug("target_core_get_fabric() failed for %s\n",
203 return ERR_PTR(-EINVAL
);
205 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
206 " %s\n", tf
->tf_ops
->name
);
208 * On a successful target_core_get_fabric() look, the returned
209 * struct target_fabric_configfs *tf will contain a usage reference.
211 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
214 tf
->tf_group
.default_groups
= tf
->tf_default_groups
;
215 tf
->tf_group
.default_groups
[0] = &tf
->tf_disc_group
;
216 tf
->tf_group
.default_groups
[1] = NULL
;
218 config_group_init_type_name(&tf
->tf_group
, name
, &tf
->tf_wwn_cit
);
219 config_group_init_type_name(&tf
->tf_disc_group
, "discovery_auth",
220 &tf
->tf_discovery_cit
);
222 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
223 " %s\n", tf
->tf_group
.cg_item
.ci_name
);
224 return &tf
->tf_group
;
228 * Called from struct target_core_group_ops->drop_item()
230 static void target_core_deregister_fabric(
231 struct config_group
*group
,
232 struct config_item
*item
)
234 struct target_fabric_configfs
*tf
= container_of(
235 to_config_group(item
), struct target_fabric_configfs
, tf_group
);
236 struct config_group
*tf_group
;
237 struct config_item
*df_item
;
240 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
241 " tf list\n", config_item_name(item
));
243 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
244 " %s\n", tf
->tf_ops
->name
);
245 atomic_dec(&tf
->tf_access_cnt
);
247 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
248 " %s\n", config_item_name(item
));
250 tf_group
= &tf
->tf_group
;
251 for (i
= 0; tf_group
->default_groups
[i
]; i
++) {
252 df_item
= &tf_group
->default_groups
[i
]->cg_item
;
253 tf_group
->default_groups
[i
] = NULL
;
254 config_item_put(df_item
);
256 config_item_put(item
);
259 static struct configfs_group_operations target_core_fabric_group_ops
= {
260 .make_group
= &target_core_register_fabric
,
261 .drop_item
= &target_core_deregister_fabric
,
265 * All item attributes appearing in /sys/kernel/target/ appear here.
267 static struct configfs_attribute
*target_core_fabric_item_attrs
[] = {
268 &target_core_item_attr_version
,
273 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
275 static struct config_item_type target_core_fabrics_item
= {
276 .ct_item_ops
= &target_core_fabric_item_ops
,
277 .ct_group_ops
= &target_core_fabric_group_ops
,
278 .ct_attrs
= target_core_fabric_item_attrs
,
279 .ct_owner
= THIS_MODULE
,
282 static struct configfs_subsystem target_core_fabrics
= {
285 .ci_namebuf
= "target",
286 .ci_type
= &target_core_fabrics_item
,
291 int target_depend_item(struct config_item
*item
)
293 return configfs_depend_item(&target_core_fabrics
, item
);
295 EXPORT_SYMBOL(target_depend_item
);
297 void target_undepend_item(struct config_item
*item
)
299 return configfs_undepend_item(&target_core_fabrics
, item
);
301 EXPORT_SYMBOL(target_undepend_item
);
303 /*##############################################################################
304 // Start functions called by external Target Fabrics Modules
305 //############################################################################*/
307 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops
*tfo
)
310 pr_err("Missing tfo->name\n");
313 if (strlen(tfo
->name
) >= TARGET_FABRIC_NAME_SIZE
) {
314 pr_err("Passed name: %s exceeds TARGET_FABRIC"
315 "_NAME_SIZE\n", tfo
->name
);
318 if (!tfo
->get_fabric_name
) {
319 pr_err("Missing tfo->get_fabric_name()\n");
322 if (!tfo
->tpg_get_wwn
) {
323 pr_err("Missing tfo->tpg_get_wwn()\n");
326 if (!tfo
->tpg_get_tag
) {
327 pr_err("Missing tfo->tpg_get_tag()\n");
330 if (!tfo
->tpg_check_demo_mode
) {
331 pr_err("Missing tfo->tpg_check_demo_mode()\n");
334 if (!tfo
->tpg_check_demo_mode_cache
) {
335 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
338 if (!tfo
->tpg_check_demo_mode_write_protect
) {
339 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
342 if (!tfo
->tpg_check_prod_mode_write_protect
) {
343 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
346 if (!tfo
->tpg_get_inst_index
) {
347 pr_err("Missing tfo->tpg_get_inst_index()\n");
350 if (!tfo
->release_cmd
) {
351 pr_err("Missing tfo->release_cmd()\n");
354 if (!tfo
->shutdown_session
) {
355 pr_err("Missing tfo->shutdown_session()\n");
358 if (!tfo
->close_session
) {
359 pr_err("Missing tfo->close_session()\n");
362 if (!tfo
->sess_get_index
) {
363 pr_err("Missing tfo->sess_get_index()\n");
366 if (!tfo
->write_pending
) {
367 pr_err("Missing tfo->write_pending()\n");
370 if (!tfo
->write_pending_status
) {
371 pr_err("Missing tfo->write_pending_status()\n");
374 if (!tfo
->set_default_node_attributes
) {
375 pr_err("Missing tfo->set_default_node_attributes()\n");
378 if (!tfo
->get_cmd_state
) {
379 pr_err("Missing tfo->get_cmd_state()\n");
382 if (!tfo
->queue_data_in
) {
383 pr_err("Missing tfo->queue_data_in()\n");
386 if (!tfo
->queue_status
) {
387 pr_err("Missing tfo->queue_status()\n");
390 if (!tfo
->queue_tm_rsp
) {
391 pr_err("Missing tfo->queue_tm_rsp()\n");
394 if (!tfo
->aborted_task
) {
395 pr_err("Missing tfo->aborted_task()\n");
399 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
400 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
401 * target_core_fabric_configfs.c WWN+TPG group context code.
403 if (!tfo
->fabric_make_wwn
) {
404 pr_err("Missing tfo->fabric_make_wwn()\n");
407 if (!tfo
->fabric_drop_wwn
) {
408 pr_err("Missing tfo->fabric_drop_wwn()\n");
411 if (!tfo
->fabric_make_tpg
) {
412 pr_err("Missing tfo->fabric_make_tpg()\n");
415 if (!tfo
->fabric_drop_tpg
) {
416 pr_err("Missing tfo->fabric_drop_tpg()\n");
423 int target_register_template(const struct target_core_fabric_ops
*fo
)
425 struct target_fabric_configfs
*tf
;
428 ret
= target_fabric_tf_ops_check(fo
);
432 tf
= kzalloc(sizeof(struct target_fabric_configfs
), GFP_KERNEL
);
434 pr_err("%s: could not allocate memory!\n", __func__
);
438 INIT_LIST_HEAD(&tf
->tf_list
);
439 atomic_set(&tf
->tf_access_cnt
, 0);
441 target_fabric_setup_cits(tf
);
443 mutex_lock(&g_tf_lock
);
444 list_add_tail(&tf
->tf_list
, &g_tf_list
);
445 mutex_unlock(&g_tf_lock
);
449 EXPORT_SYMBOL(target_register_template
);
451 void target_unregister_template(const struct target_core_fabric_ops
*fo
)
453 struct target_fabric_configfs
*t
;
455 mutex_lock(&g_tf_lock
);
456 list_for_each_entry(t
, &g_tf_list
, tf_list
) {
457 if (!strcmp(t
->tf_ops
->name
, fo
->name
)) {
458 BUG_ON(atomic_read(&t
->tf_access_cnt
));
459 list_del(&t
->tf_list
);
460 mutex_unlock(&g_tf_lock
);
462 * Wait for any outstanding fabric se_deve_entry->rcu_head
463 * callbacks to complete post kfree_rcu(), before allowing
464 * fabric driver unload of TFO->module to proceed.
471 mutex_unlock(&g_tf_lock
);
473 EXPORT_SYMBOL(target_unregister_template
);
475 /*##############################################################################
476 // Stop functions called by external Target Fabrics Modules
477 //############################################################################*/
479 /* Start functions for struct config_item_type tb_dev_attrib_cit */
480 #define DEF_TB_DEV_ATTRIB_SHOW(_name) \
481 static ssize_t show_##_name(struct se_dev_attrib *da, char *page) \
483 return snprintf(page, PAGE_SIZE, "%u\n", da->_name); \
486 DEF_TB_DEV_ATTRIB_SHOW(emulate_model_alias
);
487 DEF_TB_DEV_ATTRIB_SHOW(emulate_dpo
);
488 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_write
);
489 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_read
);
490 DEF_TB_DEV_ATTRIB_SHOW(emulate_write_cache
);
491 DEF_TB_DEV_ATTRIB_SHOW(emulate_ua_intlck_ctrl
);
492 DEF_TB_DEV_ATTRIB_SHOW(emulate_tas
);
493 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpu
);
494 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpws
);
495 DEF_TB_DEV_ATTRIB_SHOW(emulate_caw
);
496 DEF_TB_DEV_ATTRIB_SHOW(emulate_3pc
);
497 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_type
);
498 DEF_TB_DEV_ATTRIB_SHOW(hw_pi_prot_type
);
499 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_format
);
500 DEF_TB_DEV_ATTRIB_SHOW(enforce_pr_isids
);
501 DEF_TB_DEV_ATTRIB_SHOW(is_nonrot
);
502 DEF_TB_DEV_ATTRIB_SHOW(emulate_rest_reord
);
503 DEF_TB_DEV_ATTRIB_SHOW(force_pr_aptpl
);
504 DEF_TB_DEV_ATTRIB_SHOW(hw_block_size
);
505 DEF_TB_DEV_ATTRIB_SHOW(block_size
);
506 DEF_TB_DEV_ATTRIB_SHOW(hw_max_sectors
);
507 DEF_TB_DEV_ATTRIB_SHOW(optimal_sectors
);
508 DEF_TB_DEV_ATTRIB_SHOW(hw_queue_depth
);
509 DEF_TB_DEV_ATTRIB_SHOW(queue_depth
);
510 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_lba_count
);
511 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_block_desc_count
);
512 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity
);
513 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity_alignment
);
514 DEF_TB_DEV_ATTRIB_SHOW(max_write_same_len
);
516 #define DEF_TB_DEV_ATTRIB_STORE_U32(_name) \
517 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
523 ret = kstrtou32(page, 0, &val); \
530 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_lba_count
);
531 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_block_desc_count
);
532 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity
);
533 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity_alignment
);
534 DEF_TB_DEV_ATTRIB_STORE_U32(max_write_same_len
);
536 #define DEF_TB_DEV_ATTRIB_STORE_BOOL(_name) \
537 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
543 ret = strtobool(page, &flag); \
550 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_fua_write
);
551 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_caw
);
552 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_3pc
);
553 DEF_TB_DEV_ATTRIB_STORE_BOOL(enforce_pr_isids
);
554 DEF_TB_DEV_ATTRIB_STORE_BOOL(is_nonrot
);
556 #define DEF_TB_DEV_ATTRIB_STORE_STUB(_name) \
557 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
560 printk_once(KERN_WARNING \
561 "ignoring deprecated ##_name## attribute\n"); \
565 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_dpo
);
566 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_fua_read
);
568 static void dev_set_t10_wwn_model_alias(struct se_device
*dev
)
570 const char *configname
;
572 configname
= config_item_name(&dev
->dev_group
.cg_item
);
573 if (strlen(configname
) >= 16) {
574 pr_warn("dev[%p]: Backstore name '%s' is too long for "
575 "INQUIRY_MODEL, truncating to 16 bytes\n", dev
,
578 snprintf(&dev
->t10_wwn
.model
[0], 16, "%s", configname
);
581 static ssize_t
store_emulate_model_alias(struct se_dev_attrib
*da
,
582 const char *page
, size_t count
)
584 struct se_device
*dev
= da
->da_dev
;
588 if (dev
->export_count
) {
589 pr_err("dev[%p]: Unable to change model alias"
590 " while export_count is %d\n",
591 dev
, dev
->export_count
);
595 ret
= strtobool(page
, &flag
);
600 dev_set_t10_wwn_model_alias(dev
);
602 strncpy(&dev
->t10_wwn
.model
[0],
603 dev
->transport
->inquiry_prod
, 16);
605 da
->emulate_model_alias
= flag
;
609 static ssize_t
store_emulate_write_cache(struct se_dev_attrib
*da
,
610 const char *page
, size_t count
)
615 ret
= strtobool(page
, &flag
);
619 if (flag
&& da
->da_dev
->transport
->get_write_cache
) {
620 pr_err("emulate_write_cache not supported for this device\n");
624 da
->emulate_write_cache
= flag
;
625 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
630 static ssize_t
store_emulate_ua_intlck_ctrl(struct se_dev_attrib
*da
,
631 const char *page
, size_t count
)
636 ret
= kstrtou32(page
, 0, &val
);
640 if (val
!= 0 && val
!= 1 && val
!= 2) {
641 pr_err("Illegal value %d\n", val
);
645 if (da
->da_dev
->export_count
) {
646 pr_err("dev[%p]: Unable to change SE Device"
647 " UA_INTRLCK_CTRL while export_count is %d\n",
648 da
->da_dev
, da
->da_dev
->export_count
);
651 da
->emulate_ua_intlck_ctrl
= val
;
652 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
657 static ssize_t
store_emulate_tas(struct se_dev_attrib
*da
,
658 const char *page
, size_t count
)
663 ret
= strtobool(page
, &flag
);
667 if (da
->da_dev
->export_count
) {
668 pr_err("dev[%p]: Unable to change SE Device TAS while"
669 " export_count is %d\n",
670 da
->da_dev
, da
->da_dev
->export_count
);
673 da
->emulate_tas
= flag
;
674 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
675 da
->da_dev
, flag
? "Enabled" : "Disabled");
680 static ssize_t
store_emulate_tpu(struct se_dev_attrib
*da
,
681 const char *page
, size_t count
)
686 ret
= strtobool(page
, &flag
);
691 * We expect this value to be non-zero when generic Block Layer
692 * Discard supported is detected iblock_create_virtdevice().
694 if (flag
&& !da
->max_unmap_block_desc_count
) {
695 pr_err("Generic Block Discard not supported\n");
699 da
->emulate_tpu
= flag
;
700 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
705 static ssize_t
store_emulate_tpws(struct se_dev_attrib
*da
,
706 const char *page
, size_t count
)
711 ret
= strtobool(page
, &flag
);
716 * We expect this value to be non-zero when generic Block Layer
717 * Discard supported is detected iblock_create_virtdevice().
719 if (flag
&& !da
->max_unmap_block_desc_count
) {
720 pr_err("Generic Block Discard not supported\n");
724 da
->emulate_tpws
= flag
;
725 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
730 static ssize_t
store_pi_prot_type(struct se_dev_attrib
*da
,
731 const char *page
, size_t count
)
733 int old_prot
= da
->pi_prot_type
, ret
;
734 struct se_device
*dev
= da
->da_dev
;
737 ret
= kstrtou32(page
, 0, &flag
);
741 if (flag
!= 0 && flag
!= 1 && flag
!= 2 && flag
!= 3) {
742 pr_err("Illegal value %d for pi_prot_type\n", flag
);
746 pr_err("DIF TYPE2 protection currently not supported\n");
749 if (da
->hw_pi_prot_type
) {
750 pr_warn("DIF protection enabled on underlying hardware,"
754 if (!dev
->transport
->init_prot
|| !dev
->transport
->free_prot
) {
755 /* 0 is only allowed value for non-supporting backends */
759 pr_err("DIF protection not supported by backend: %s\n",
760 dev
->transport
->name
);
763 if (!(dev
->dev_flags
& DF_CONFIGURED
)) {
764 pr_err("DIF protection requires device to be configured\n");
767 if (dev
->export_count
) {
768 pr_err("dev[%p]: Unable to change SE Device PROT type while"
769 " export_count is %d\n", dev
, dev
->export_count
);
773 da
->pi_prot_type
= flag
;
775 if (flag
&& !old_prot
) {
776 ret
= dev
->transport
->init_prot(dev
);
778 da
->pi_prot_type
= old_prot
;
782 } else if (!flag
&& old_prot
) {
783 dev
->transport
->free_prot(dev
);
786 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev
, flag
);
790 static ssize_t
store_pi_prot_format(struct se_dev_attrib
*da
,
791 const char *page
, size_t count
)
793 struct se_device
*dev
= da
->da_dev
;
797 ret
= strtobool(page
, &flag
);
804 if (!dev
->transport
->format_prot
) {
805 pr_err("DIF protection format not supported by backend %s\n",
806 dev
->transport
->name
);
809 if (!(dev
->dev_flags
& DF_CONFIGURED
)) {
810 pr_err("DIF protection format requires device to be configured\n");
813 if (dev
->export_count
) {
814 pr_err("dev[%p]: Unable to format SE Device PROT type while"
815 " export_count is %d\n", dev
, dev
->export_count
);
819 ret
= dev
->transport
->format_prot(dev
);
823 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev
);
827 static ssize_t
store_force_pr_aptpl(struct se_dev_attrib
*da
,
828 const char *page
, size_t count
)
833 ret
= strtobool(page
, &flag
);
836 if (da
->da_dev
->export_count
) {
837 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
838 " export_count is %d\n",
839 da
->da_dev
, da
->da_dev
->export_count
);
843 da
->force_pr_aptpl
= flag
;
844 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da
->da_dev
, flag
);
848 static ssize_t
store_emulate_rest_reord(struct se_dev_attrib
*da
,
849 const char *page
, size_t count
)
854 ret
= strtobool(page
, &flag
);
859 printk(KERN_ERR
"dev[%p]: SE Device emulation of restricted"
860 " reordering not implemented\n", da
->da_dev
);
863 da
->emulate_rest_reord
= flag
;
864 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
870 * Note, this can only be called on unexported SE Device Object.
872 static ssize_t
store_queue_depth(struct se_dev_attrib
*da
,
873 const char *page
, size_t count
)
875 struct se_device
*dev
= da
->da_dev
;
879 ret
= kstrtou32(page
, 0, &val
);
883 if (dev
->export_count
) {
884 pr_err("dev[%p]: Unable to change SE Device TCQ while"
885 " export_count is %d\n",
886 dev
, dev
->export_count
);
890 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev
);
894 if (val
> dev
->dev_attrib
.queue_depth
) {
895 if (val
> dev
->dev_attrib
.hw_queue_depth
) {
896 pr_err("dev[%p]: Passed queue_depth:"
897 " %u exceeds TCM/SE_Device MAX"
898 " TCQ: %u\n", dev
, val
,
899 dev
->dev_attrib
.hw_queue_depth
);
903 da
->queue_depth
= dev
->queue_depth
= val
;
904 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev
, val
);
908 static ssize_t
store_optimal_sectors(struct se_dev_attrib
*da
,
909 const char *page
, size_t count
)
914 ret
= kstrtou32(page
, 0, &val
);
918 if (da
->da_dev
->export_count
) {
919 pr_err("dev[%p]: Unable to change SE Device"
920 " optimal_sectors while export_count is %d\n",
921 da
->da_dev
, da
->da_dev
->export_count
);
924 if (val
> da
->hw_max_sectors
) {
925 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
926 " greater than hw_max_sectors: %u\n",
927 da
->da_dev
, val
, da
->hw_max_sectors
);
931 da
->optimal_sectors
= val
;
932 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
937 static ssize_t
store_block_size(struct se_dev_attrib
*da
,
938 const char *page
, size_t count
)
943 ret
= kstrtou32(page
, 0, &val
);
947 if (da
->da_dev
->export_count
) {
948 pr_err("dev[%p]: Unable to change SE Device block_size"
949 " while export_count is %d\n",
950 da
->da_dev
, da
->da_dev
->export_count
);
954 if (val
!= 512 && val
!= 1024 && val
!= 2048 && val
!= 4096) {
955 pr_err("dev[%p]: Illegal value for block_device: %u"
956 " for SE device, must be 512, 1024, 2048 or 4096\n",
961 da
->block_size
= val
;
962 if (da
->max_bytes_per_io
)
963 da
->hw_max_sectors
= da
->max_bytes_per_io
/ val
;
965 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
970 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib
, se_dev_attrib
);
971 #define TB_DEV_ATTR(_backend, _name, _mode) \
972 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
973 __CONFIGFS_EATTR(_name, _mode, \
977 #define TB_DEV_ATTR_RO(_backend, _name) \
978 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
979 __CONFIGFS_EATTR_RO(_name, \
982 TB_DEV_ATTR(target_core
, emulate_model_alias
, S_IRUGO
| S_IWUSR
);
983 TB_DEV_ATTR(target_core
, emulate_dpo
, S_IRUGO
| S_IWUSR
);
984 TB_DEV_ATTR(target_core
, emulate_fua_write
, S_IRUGO
| S_IWUSR
);
985 TB_DEV_ATTR(target_core
, emulate_fua_read
, S_IRUGO
| S_IWUSR
);
986 TB_DEV_ATTR(target_core
, emulate_write_cache
, S_IRUGO
| S_IWUSR
);
987 TB_DEV_ATTR(target_core
, emulate_ua_intlck_ctrl
, S_IRUGO
| S_IWUSR
);
988 TB_DEV_ATTR(target_core
, emulate_tas
, S_IRUGO
| S_IWUSR
);
989 TB_DEV_ATTR(target_core
, emulate_tpu
, S_IRUGO
| S_IWUSR
);
990 TB_DEV_ATTR(target_core
, emulate_tpws
, S_IRUGO
| S_IWUSR
);
991 TB_DEV_ATTR(target_core
, emulate_caw
, S_IRUGO
| S_IWUSR
);
992 TB_DEV_ATTR(target_core
, emulate_3pc
, S_IRUGO
| S_IWUSR
);
993 TB_DEV_ATTR(target_core
, pi_prot_type
, S_IRUGO
| S_IWUSR
);
994 TB_DEV_ATTR_RO(target_core
, hw_pi_prot_type
);
995 TB_DEV_ATTR(target_core
, pi_prot_format
, S_IRUGO
| S_IWUSR
);
996 TB_DEV_ATTR(target_core
, enforce_pr_isids
, S_IRUGO
| S_IWUSR
);
997 TB_DEV_ATTR(target_core
, is_nonrot
, S_IRUGO
| S_IWUSR
);
998 TB_DEV_ATTR(target_core
, emulate_rest_reord
, S_IRUGO
| S_IWUSR
);
999 TB_DEV_ATTR(target_core
, force_pr_aptpl
, S_IRUGO
| S_IWUSR
)
1000 TB_DEV_ATTR_RO(target_core
, hw_block_size
);
1001 TB_DEV_ATTR(target_core
, block_size
, S_IRUGO
| S_IWUSR
)
1002 TB_DEV_ATTR_RO(target_core
, hw_max_sectors
);
1003 TB_DEV_ATTR(target_core
, optimal_sectors
, S_IRUGO
| S_IWUSR
);
1004 TB_DEV_ATTR_RO(target_core
, hw_queue_depth
);
1005 TB_DEV_ATTR(target_core
, queue_depth
, S_IRUGO
| S_IWUSR
);
1006 TB_DEV_ATTR(target_core
, max_unmap_lba_count
, S_IRUGO
| S_IWUSR
);
1007 TB_DEV_ATTR(target_core
, max_unmap_block_desc_count
, S_IRUGO
| S_IWUSR
);
1008 TB_DEV_ATTR(target_core
, unmap_granularity
, S_IRUGO
| S_IWUSR
);
1009 TB_DEV_ATTR(target_core
, unmap_granularity_alignment
, S_IRUGO
| S_IWUSR
);
1010 TB_DEV_ATTR(target_core
, max_write_same_len
, S_IRUGO
| S_IWUSR
);
1012 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib
, se_dev_attrib
);
1013 CONFIGFS_EATTR_OPS(target_core_dev_attrib
, se_dev_attrib
, da_group
);
1016 * dev_attrib attributes for devices using the target core SBC/SPC
1017 * interpreter. Any backend using spc_parse_cdb should be using
1020 struct configfs_attribute
*sbc_attrib_attrs
[] = {
1021 &target_core_dev_attrib_emulate_model_alias
.attr
,
1022 &target_core_dev_attrib_emulate_dpo
.attr
,
1023 &target_core_dev_attrib_emulate_fua_write
.attr
,
1024 &target_core_dev_attrib_emulate_fua_read
.attr
,
1025 &target_core_dev_attrib_emulate_write_cache
.attr
,
1026 &target_core_dev_attrib_emulate_ua_intlck_ctrl
.attr
,
1027 &target_core_dev_attrib_emulate_tas
.attr
,
1028 &target_core_dev_attrib_emulate_tpu
.attr
,
1029 &target_core_dev_attrib_emulate_tpws
.attr
,
1030 &target_core_dev_attrib_emulate_caw
.attr
,
1031 &target_core_dev_attrib_emulate_3pc
.attr
,
1032 &target_core_dev_attrib_pi_prot_type
.attr
,
1033 &target_core_dev_attrib_hw_pi_prot_type
.attr
,
1034 &target_core_dev_attrib_pi_prot_format
.attr
,
1035 &target_core_dev_attrib_enforce_pr_isids
.attr
,
1036 &target_core_dev_attrib_is_nonrot
.attr
,
1037 &target_core_dev_attrib_emulate_rest_reord
.attr
,
1038 &target_core_dev_attrib_force_pr_aptpl
.attr
,
1039 &target_core_dev_attrib_hw_block_size
.attr
,
1040 &target_core_dev_attrib_block_size
.attr
,
1041 &target_core_dev_attrib_hw_max_sectors
.attr
,
1042 &target_core_dev_attrib_optimal_sectors
.attr
,
1043 &target_core_dev_attrib_hw_queue_depth
.attr
,
1044 &target_core_dev_attrib_queue_depth
.attr
,
1045 &target_core_dev_attrib_max_unmap_lba_count
.attr
,
1046 &target_core_dev_attrib_max_unmap_block_desc_count
.attr
,
1047 &target_core_dev_attrib_unmap_granularity
.attr
,
1048 &target_core_dev_attrib_unmap_granularity_alignment
.attr
,
1049 &target_core_dev_attrib_max_write_same_len
.attr
,
1052 EXPORT_SYMBOL(sbc_attrib_attrs
);
1054 TB_DEV_ATTR_RO(target_pt
, hw_pi_prot_type
);
1055 TB_DEV_ATTR_RO(target_pt
, hw_block_size
);
1056 TB_DEV_ATTR_RO(target_pt
, hw_max_sectors
);
1057 TB_DEV_ATTR_RO(target_pt
, hw_queue_depth
);
1060 * Minimal dev_attrib attributes for devices passing through CDBs.
1061 * In this case we only provide a few read-only attributes for
1062 * backwards compatibility.
1064 struct configfs_attribute
*passthrough_attrib_attrs
[] = {
1065 &target_pt_dev_attrib_hw_pi_prot_type
.attr
,
1066 &target_pt_dev_attrib_hw_block_size
.attr
,
1067 &target_pt_dev_attrib_hw_max_sectors
.attr
,
1068 &target_pt_dev_attrib_hw_queue_depth
.attr
,
1071 EXPORT_SYMBOL(passthrough_attrib_attrs
);
1073 static struct configfs_item_operations target_core_dev_attrib_ops
= {
1074 .show_attribute
= target_core_dev_attrib_attr_show
,
1075 .store_attribute
= target_core_dev_attrib_attr_store
,
1078 TB_CIT_SETUP_DRV(dev_attrib
, &target_core_dev_attrib_ops
, NULL
);
1080 /* End functions for struct config_item_type tb_dev_attrib_cit */
1082 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1084 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn
, t10_wwn
);
1085 #define SE_DEV_WWN_ATTR(_name, _mode) \
1086 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
1087 __CONFIGFS_EATTR(_name, _mode, \
1088 target_core_dev_wwn_show_attr_##_name, \
1089 target_core_dev_wwn_store_attr_##_name);
1091 #define SE_DEV_WWN_ATTR_RO(_name); \
1093 static struct target_core_dev_wwn_attribute \
1094 target_core_dev_wwn_##_name = \
1095 __CONFIGFS_EATTR_RO(_name, \
1096 target_core_dev_wwn_show_attr_##_name); \
1100 * VPD page 0x80 Unit serial
1102 static ssize_t
target_core_dev_wwn_show_attr_vpd_unit_serial(
1103 struct t10_wwn
*t10_wwn
,
1106 return sprintf(page
, "T10 VPD Unit Serial Number: %s\n",
1107 &t10_wwn
->unit_serial
[0]);
1110 static ssize_t
target_core_dev_wwn_store_attr_vpd_unit_serial(
1111 struct t10_wwn
*t10_wwn
,
1115 struct se_device
*dev
= t10_wwn
->t10_dev
;
1116 unsigned char buf
[INQUIRY_VPD_SERIAL_LEN
];
1119 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1120 * from the struct scsi_device level firmware, do not allow
1121 * VPD Unit Serial to be emulated.
1123 * Note this struct scsi_device could also be emulating VPD
1124 * information from its drivers/scsi LLD. But for now we assume
1125 * it is doing 'the right thing' wrt a world wide unique
1126 * VPD Unit Serial Number that OS dependent multipath can depend on.
1128 if (dev
->dev_flags
& DF_FIRMWARE_VPD_UNIT_SERIAL
) {
1129 pr_err("Underlying SCSI device firmware provided VPD"
1130 " Unit Serial, ignoring request\n");
1134 if (strlen(page
) >= INQUIRY_VPD_SERIAL_LEN
) {
1135 pr_err("Emulated VPD Unit Serial exceeds"
1136 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN
);
1140 * Check to see if any active $FABRIC_MOD exports exist. If they
1141 * do exist, fail here as changing this information on the fly
1142 * (underneath the initiator side OS dependent multipath code)
1143 * could cause negative effects.
1145 if (dev
->export_count
) {
1146 pr_err("Unable to set VPD Unit Serial while"
1147 " active %d $FABRIC_MOD exports exist\n",
1153 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1155 * Also, strip any newline added from the userspace
1156 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1158 memset(buf
, 0, INQUIRY_VPD_SERIAL_LEN
);
1159 snprintf(buf
, INQUIRY_VPD_SERIAL_LEN
, "%s", page
);
1160 snprintf(dev
->t10_wwn
.unit_serial
, INQUIRY_VPD_SERIAL_LEN
,
1161 "%s", strstrip(buf
));
1162 dev
->dev_flags
|= DF_EMULATED_VPD_UNIT_SERIAL
;
1164 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1165 " %s\n", dev
->t10_wwn
.unit_serial
);
1170 SE_DEV_WWN_ATTR(vpd_unit_serial
, S_IRUGO
| S_IWUSR
);
1173 * VPD page 0x83 Protocol Identifier
1175 static ssize_t
target_core_dev_wwn_show_attr_vpd_protocol_identifier(
1176 struct t10_wwn
*t10_wwn
,
1179 struct t10_vpd
*vpd
;
1180 unsigned char buf
[VPD_TMP_BUF_SIZE
];
1183 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
1185 spin_lock(&t10_wwn
->t10_vpd_lock
);
1186 list_for_each_entry(vpd
, &t10_wwn
->t10_vpd_list
, vpd_list
) {
1187 if (!vpd
->protocol_identifier_set
)
1190 transport_dump_vpd_proto_id(vpd
, buf
, VPD_TMP_BUF_SIZE
);
1192 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1195 len
+= sprintf(page
+len
, "%s", buf
);
1197 spin_unlock(&t10_wwn
->t10_vpd_lock
);
1202 static ssize_t
target_core_dev_wwn_store_attr_vpd_protocol_identifier(
1203 struct t10_wwn
*t10_wwn
,
1210 SE_DEV_WWN_ATTR(vpd_protocol_identifier
, S_IRUGO
| S_IWUSR
);
1213 * Generic wrapper for dumping VPD identifiers by association.
1215 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1216 static ssize_t target_core_dev_wwn_show_attr_##_name( \
1217 struct t10_wwn *t10_wwn, \
1220 struct t10_vpd *vpd; \
1221 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1224 spin_lock(&t10_wwn->t10_vpd_lock); \
1225 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1226 if (vpd->association != _assoc) \
1229 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1230 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1231 if (len + strlen(buf) >= PAGE_SIZE) \
1233 len += sprintf(page+len, "%s", buf); \
1235 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1236 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1237 if (len + strlen(buf) >= PAGE_SIZE) \
1239 len += sprintf(page+len, "%s", buf); \
1241 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1242 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1243 if (len + strlen(buf) >= PAGE_SIZE) \
1245 len += sprintf(page+len, "%s", buf); \
1247 spin_unlock(&t10_wwn->t10_vpd_lock); \
1253 * VPD page 0x83 Association: Logical Unit
1255 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit
, 0x00);
1257 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
1258 struct t10_wwn
*t10_wwn
,
1265 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit
, S_IRUGO
| S_IWUSR
);
1268 * VPD page 0x83 Association: Target Port
1270 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port
, 0x10);
1272 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1273 struct t10_wwn
*t10_wwn
,
1280 SE_DEV_WWN_ATTR(vpd_assoc_target_port
, S_IRUGO
| S_IWUSR
);
1283 * VPD page 0x83 Association: SCSI Target Device
1285 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device
, 0x20);
1287 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1288 struct t10_wwn
*t10_wwn
,
1295 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device
, S_IRUGO
| S_IWUSR
);
1297 CONFIGFS_EATTR_OPS(target_core_dev_wwn
, t10_wwn
, t10_wwn_group
);
1299 static struct configfs_attribute
*target_core_dev_wwn_attrs
[] = {
1300 &target_core_dev_wwn_vpd_unit_serial
.attr
,
1301 &target_core_dev_wwn_vpd_protocol_identifier
.attr
,
1302 &target_core_dev_wwn_vpd_assoc_logical_unit
.attr
,
1303 &target_core_dev_wwn_vpd_assoc_target_port
.attr
,
1304 &target_core_dev_wwn_vpd_assoc_scsi_target_device
.attr
,
1308 static struct configfs_item_operations target_core_dev_wwn_ops
= {
1309 .show_attribute
= target_core_dev_wwn_attr_show
,
1310 .store_attribute
= target_core_dev_wwn_attr_store
,
1313 TB_CIT_SETUP(dev_wwn
, &target_core_dev_wwn_ops
, NULL
, target_core_dev_wwn_attrs
);
1315 /* End functions for struct config_item_type tb_dev_wwn_cit */
1317 /* Start functions for struct config_item_type tb_dev_pr_cit */
1319 CONFIGFS_EATTR_STRUCT(target_core_dev_pr
, se_device
);
1320 #define SE_DEV_PR_ATTR(_name, _mode) \
1321 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1322 __CONFIGFS_EATTR(_name, _mode, \
1323 target_core_dev_pr_show_attr_##_name, \
1324 target_core_dev_pr_store_attr_##_name);
1326 #define SE_DEV_PR_ATTR_RO(_name); \
1327 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1328 __CONFIGFS_EATTR_RO(_name, \
1329 target_core_dev_pr_show_attr_##_name);
1331 static ssize_t
target_core_dev_pr_show_spc3_res(struct se_device
*dev
,
1334 struct se_node_acl
*se_nacl
;
1335 struct t10_pr_registration
*pr_reg
;
1336 char i_buf
[PR_REG_ISID_ID_LEN
];
1338 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1340 pr_reg
= dev
->dev_pr_res_holder
;
1342 return sprintf(page
, "No SPC-3 Reservation holder\n");
1344 se_nacl
= pr_reg
->pr_reg_nacl
;
1345 core_pr_dump_initiator_port(pr_reg
, i_buf
, PR_REG_ISID_ID_LEN
);
1347 return sprintf(page
, "SPC-3 Reservation: %s Initiator: %s%s\n",
1348 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1349 se_nacl
->initiatorname
, i_buf
);
1352 static ssize_t
target_core_dev_pr_show_spc2_res(struct se_device
*dev
,
1355 struct se_node_acl
*se_nacl
;
1358 se_nacl
= dev
->dev_reserved_node_acl
;
1361 "SPC-2 Reservation: %s Initiator: %s\n",
1362 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1363 se_nacl
->initiatorname
);
1365 len
= sprintf(page
, "No SPC-2 Reservation holder\n");
1370 static ssize_t
target_core_dev_pr_show_attr_res_holder(struct se_device
*dev
,
1375 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1376 return sprintf(page
, "Passthrough\n");
1378 spin_lock(&dev
->dev_reservation_lock
);
1379 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1380 ret
= target_core_dev_pr_show_spc2_res(dev
, page
);
1382 ret
= target_core_dev_pr_show_spc3_res(dev
, page
);
1383 spin_unlock(&dev
->dev_reservation_lock
);
1387 SE_DEV_PR_ATTR_RO(res_holder
);
1389 static ssize_t
target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1390 struct se_device
*dev
, char *page
)
1394 spin_lock(&dev
->dev_reservation_lock
);
1395 if (!dev
->dev_pr_res_holder
) {
1396 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1397 } else if (dev
->dev_pr_res_holder
->pr_reg_all_tg_pt
) {
1398 len
= sprintf(page
, "SPC-3 Reservation: All Target"
1399 " Ports registration\n");
1401 len
= sprintf(page
, "SPC-3 Reservation: Single"
1402 " Target Port registration\n");
1405 spin_unlock(&dev
->dev_reservation_lock
);
1409 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts
);
1411 static ssize_t
target_core_dev_pr_show_attr_res_pr_generation(
1412 struct se_device
*dev
, char *page
)
1414 return sprintf(page
, "0x%08x\n", dev
->t10_pr
.pr_generation
);
1417 SE_DEV_PR_ATTR_RO(res_pr_generation
);
1420 * res_pr_holder_tg_port
1422 static ssize_t
target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1423 struct se_device
*dev
, char *page
)
1425 struct se_node_acl
*se_nacl
;
1426 struct se_portal_group
*se_tpg
;
1427 struct t10_pr_registration
*pr_reg
;
1428 const struct target_core_fabric_ops
*tfo
;
1431 spin_lock(&dev
->dev_reservation_lock
);
1432 pr_reg
= dev
->dev_pr_res_holder
;
1434 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1438 se_nacl
= pr_reg
->pr_reg_nacl
;
1439 se_tpg
= se_nacl
->se_tpg
;
1440 tfo
= se_tpg
->se_tpg_tfo
;
1442 len
+= sprintf(page
+len
, "SPC-3 Reservation: %s"
1443 " Target Node Endpoint: %s\n", tfo
->get_fabric_name(),
1444 tfo
->tpg_get_wwn(se_tpg
));
1445 len
+= sprintf(page
+len
, "SPC-3 Reservation: Relative Port"
1446 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1447 " %s Logical Unit: %llu\n", pr_reg
->tg_pt_sep_rtpi
,
1448 tfo
->get_fabric_name(), tfo
->tpg_get_tag(se_tpg
),
1449 tfo
->get_fabric_name(), pr_reg
->pr_aptpl_target_lun
);
1452 spin_unlock(&dev
->dev_reservation_lock
);
1456 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port
);
1458 static ssize_t
target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1459 struct se_device
*dev
, char *page
)
1461 const struct target_core_fabric_ops
*tfo
;
1462 struct t10_pr_registration
*pr_reg
;
1463 unsigned char buf
[384];
1464 char i_buf
[PR_REG_ISID_ID_LEN
];
1468 len
+= sprintf(page
+len
, "SPC-3 PR Registrations:\n");
1470 spin_lock(&dev
->t10_pr
.registration_lock
);
1471 list_for_each_entry(pr_reg
, &dev
->t10_pr
.registration_list
,
1474 memset(buf
, 0, 384);
1475 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1476 tfo
= pr_reg
->pr_reg_nacl
->se_tpg
->se_tpg_tfo
;
1477 core_pr_dump_initiator_port(pr_reg
, i_buf
,
1478 PR_REG_ISID_ID_LEN
);
1479 sprintf(buf
, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1480 tfo
->get_fabric_name(),
1481 pr_reg
->pr_reg_nacl
->initiatorname
, i_buf
, pr_reg
->pr_res_key
,
1482 pr_reg
->pr_res_generation
);
1484 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1487 len
+= sprintf(page
+len
, "%s", buf
);
1490 spin_unlock(&dev
->t10_pr
.registration_lock
);
1493 len
+= sprintf(page
+len
, "None\n");
1498 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts
);
1500 static ssize_t
target_core_dev_pr_show_attr_res_pr_type(
1501 struct se_device
*dev
, char *page
)
1503 struct t10_pr_registration
*pr_reg
;
1506 spin_lock(&dev
->dev_reservation_lock
);
1507 pr_reg
= dev
->dev_pr_res_holder
;
1509 len
= sprintf(page
, "SPC-3 Reservation Type: %s\n",
1510 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
));
1512 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1515 spin_unlock(&dev
->dev_reservation_lock
);
1519 SE_DEV_PR_ATTR_RO(res_pr_type
);
1521 static ssize_t
target_core_dev_pr_show_attr_res_type(
1522 struct se_device
*dev
, char *page
)
1524 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1525 return sprintf(page
, "SPC_PASSTHROUGH\n");
1526 else if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1527 return sprintf(page
, "SPC2_RESERVATIONS\n");
1529 return sprintf(page
, "SPC3_PERSISTENT_RESERVATIONS\n");
1532 SE_DEV_PR_ATTR_RO(res_type
);
1534 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_active(
1535 struct se_device
*dev
, char *page
)
1537 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1540 return sprintf(page
, "APTPL Bit Status: %s\n",
1541 (dev
->t10_pr
.pr_aptpl_active
) ? "Activated" : "Disabled");
1544 SE_DEV_PR_ATTR_RO(res_aptpl_active
);
1547 * res_aptpl_metadata
1549 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_metadata(
1550 struct se_device
*dev
, char *page
)
1552 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1555 return sprintf(page
, "Ready to process PR APTPL metadata..\n");
1559 Opt_initiator_fabric
, Opt_initiator_node
, Opt_initiator_sid
,
1560 Opt_sa_res_key
, Opt_res_holder
, Opt_res_type
, Opt_res_scope
,
1561 Opt_res_all_tg_pt
, Opt_mapped_lun
, Opt_target_fabric
,
1562 Opt_target_node
, Opt_tpgt
, Opt_port_rtpi
, Opt_target_lun
, Opt_err
1565 static match_table_t tokens
= {
1566 {Opt_initiator_fabric
, "initiator_fabric=%s"},
1567 {Opt_initiator_node
, "initiator_node=%s"},
1568 {Opt_initiator_sid
, "initiator_sid=%s"},
1569 {Opt_sa_res_key
, "sa_res_key=%s"},
1570 {Opt_res_holder
, "res_holder=%d"},
1571 {Opt_res_type
, "res_type=%d"},
1572 {Opt_res_scope
, "res_scope=%d"},
1573 {Opt_res_all_tg_pt
, "res_all_tg_pt=%d"},
1574 {Opt_mapped_lun
, "mapped_lun=%lld"},
1575 {Opt_target_fabric
, "target_fabric=%s"},
1576 {Opt_target_node
, "target_node=%s"},
1577 {Opt_tpgt
, "tpgt=%d"},
1578 {Opt_port_rtpi
, "port_rtpi=%d"},
1579 {Opt_target_lun
, "target_lun=%lld"},
1583 static ssize_t
target_core_dev_pr_store_attr_res_aptpl_metadata(
1584 struct se_device
*dev
,
1588 unsigned char *i_fabric
= NULL
, *i_port
= NULL
, *isid
= NULL
;
1589 unsigned char *t_fabric
= NULL
, *t_port
= NULL
;
1590 char *orig
, *ptr
, *opts
;
1591 substring_t args
[MAX_OPT_ARGS
];
1592 unsigned long long tmp_ll
;
1594 u64 mapped_lun
= 0, target_lun
= 0;
1595 int ret
= -1, res_holder
= 0, all_tg_pt
= 0, arg
, token
;
1599 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1601 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1604 if (dev
->export_count
) {
1605 pr_debug("Unable to process APTPL metadata while"
1606 " active fabric exports exist\n");
1610 opts
= kstrdup(page
, GFP_KERNEL
);
1615 while ((ptr
= strsep(&opts
, ",\n")) != NULL
) {
1619 token
= match_token(ptr
, tokens
, args
);
1621 case Opt_initiator_fabric
:
1622 i_fabric
= match_strdup(args
);
1628 case Opt_initiator_node
:
1629 i_port
= match_strdup(args
);
1634 if (strlen(i_port
) >= PR_APTPL_MAX_IPORT_LEN
) {
1635 pr_err("APTPL metadata initiator_node="
1636 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1637 PR_APTPL_MAX_IPORT_LEN
);
1642 case Opt_initiator_sid
:
1643 isid
= match_strdup(args
);
1648 if (strlen(isid
) >= PR_REG_ISID_LEN
) {
1649 pr_err("APTPL metadata initiator_isid"
1650 "= exceeds PR_REG_ISID_LEN: %d\n",
1656 case Opt_sa_res_key
:
1657 ret
= kstrtoull(args
->from
, 0, &tmp_ll
);
1659 pr_err("kstrtoull() failed for sa_res_key=\n");
1662 sa_res_key
= (u64
)tmp_ll
;
1665 * PR APTPL Metadata for Reservation
1667 case Opt_res_holder
:
1668 ret
= match_int(args
, &arg
);
1674 ret
= match_int(args
, &arg
);
1680 ret
= match_int(args
, &arg
);
1684 case Opt_res_all_tg_pt
:
1685 ret
= match_int(args
, &arg
);
1688 all_tg_pt
= (int)arg
;
1690 case Opt_mapped_lun
:
1691 ret
= match_int(args
, &arg
);
1694 mapped_lun
= (u64
)arg
;
1697 * PR APTPL Metadata for Target Port
1699 case Opt_target_fabric
:
1700 t_fabric
= match_strdup(args
);
1706 case Opt_target_node
:
1707 t_port
= match_strdup(args
);
1712 if (strlen(t_port
) >= PR_APTPL_MAX_TPORT_LEN
) {
1713 pr_err("APTPL metadata target_node="
1714 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1715 PR_APTPL_MAX_TPORT_LEN
);
1721 ret
= match_int(args
, &arg
);
1727 ret
= match_int(args
, &arg
);
1731 case Opt_target_lun
:
1732 ret
= match_int(args
, &arg
);
1735 target_lun
= (u64
)arg
;
1742 if (!i_port
|| !t_port
|| !sa_res_key
) {
1743 pr_err("Illegal parameters for APTPL registration\n");
1748 if (res_holder
&& !(type
)) {
1749 pr_err("Illegal PR type: 0x%02x for reservation"
1755 ret
= core_scsi3_alloc_aptpl_registration(&dev
->t10_pr
, sa_res_key
,
1756 i_port
, isid
, mapped_lun
, t_port
, tpgt
, target_lun
,
1757 res_holder
, all_tg_pt
, type
);
1765 return (ret
== 0) ? count
: ret
;
1768 SE_DEV_PR_ATTR(res_aptpl_metadata
, S_IRUGO
| S_IWUSR
);
1770 CONFIGFS_EATTR_OPS(target_core_dev_pr
, se_device
, dev_pr_group
);
1772 static struct configfs_attribute
*target_core_dev_pr_attrs
[] = {
1773 &target_core_dev_pr_res_holder
.attr
,
1774 &target_core_dev_pr_res_pr_all_tgt_pts
.attr
,
1775 &target_core_dev_pr_res_pr_generation
.attr
,
1776 &target_core_dev_pr_res_pr_holder_tg_port
.attr
,
1777 &target_core_dev_pr_res_pr_registered_i_pts
.attr
,
1778 &target_core_dev_pr_res_pr_type
.attr
,
1779 &target_core_dev_pr_res_type
.attr
,
1780 &target_core_dev_pr_res_aptpl_active
.attr
,
1781 &target_core_dev_pr_res_aptpl_metadata
.attr
,
1785 static struct configfs_item_operations target_core_dev_pr_ops
= {
1786 .show_attribute
= target_core_dev_pr_attr_show
,
1787 .store_attribute
= target_core_dev_pr_attr_store
,
1790 TB_CIT_SETUP(dev_pr
, &target_core_dev_pr_ops
, NULL
, target_core_dev_pr_attrs
);
1792 /* End functions for struct config_item_type tb_dev_pr_cit */
1794 /* Start functions for struct config_item_type tb_dev_cit */
1796 static ssize_t
target_core_show_dev_info(void *p
, char *page
)
1798 struct se_device
*dev
= p
;
1800 ssize_t read_bytes
= 0;
1802 transport_dump_dev_state(dev
, page
, &bl
);
1804 read_bytes
+= dev
->transport
->show_configfs_dev_params(dev
,
1809 static struct target_core_configfs_attribute target_core_attr_dev_info
= {
1810 .attr
= { .ca_owner
= THIS_MODULE
,
1812 .ca_mode
= S_IRUGO
},
1813 .show
= target_core_show_dev_info
,
1817 static ssize_t
target_core_store_dev_control(
1822 struct se_device
*dev
= p
;
1824 return dev
->transport
->set_configfs_dev_params(dev
, page
, count
);
1827 static struct target_core_configfs_attribute target_core_attr_dev_control
= {
1828 .attr
= { .ca_owner
= THIS_MODULE
,
1829 .ca_name
= "control",
1830 .ca_mode
= S_IWUSR
},
1832 .store
= target_core_store_dev_control
,
1835 static ssize_t
target_core_show_dev_alias(void *p
, char *page
)
1837 struct se_device
*dev
= p
;
1839 if (!(dev
->dev_flags
& DF_USING_ALIAS
))
1842 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->dev_alias
);
1845 static ssize_t
target_core_store_dev_alias(
1850 struct se_device
*dev
= p
;
1851 struct se_hba
*hba
= dev
->se_hba
;
1854 if (count
> (SE_DEV_ALIAS_LEN
-1)) {
1855 pr_err("alias count: %d exceeds"
1856 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count
,
1857 SE_DEV_ALIAS_LEN
-1);
1861 read_bytes
= snprintf(&dev
->dev_alias
[0], SE_DEV_ALIAS_LEN
, "%s", page
);
1864 if (dev
->dev_alias
[read_bytes
- 1] == '\n')
1865 dev
->dev_alias
[read_bytes
- 1] = '\0';
1867 dev
->dev_flags
|= DF_USING_ALIAS
;
1869 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1870 config_item_name(&hba
->hba_group
.cg_item
),
1871 config_item_name(&dev
->dev_group
.cg_item
),
1877 static struct target_core_configfs_attribute target_core_attr_dev_alias
= {
1878 .attr
= { .ca_owner
= THIS_MODULE
,
1880 .ca_mode
= S_IRUGO
| S_IWUSR
},
1881 .show
= target_core_show_dev_alias
,
1882 .store
= target_core_store_dev_alias
,
1885 static ssize_t
target_core_show_dev_udev_path(void *p
, char *page
)
1887 struct se_device
*dev
= p
;
1889 if (!(dev
->dev_flags
& DF_USING_UDEV_PATH
))
1892 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->udev_path
);
1895 static ssize_t
target_core_store_dev_udev_path(
1900 struct se_device
*dev
= p
;
1901 struct se_hba
*hba
= dev
->se_hba
;
1904 if (count
> (SE_UDEV_PATH_LEN
-1)) {
1905 pr_err("udev_path count: %d exceeds"
1906 " SE_UDEV_PATH_LEN-1: %u\n", (int)count
,
1907 SE_UDEV_PATH_LEN
-1);
1911 read_bytes
= snprintf(&dev
->udev_path
[0], SE_UDEV_PATH_LEN
,
1915 if (dev
->udev_path
[read_bytes
- 1] == '\n')
1916 dev
->udev_path
[read_bytes
- 1] = '\0';
1918 dev
->dev_flags
|= DF_USING_UDEV_PATH
;
1920 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1921 config_item_name(&hba
->hba_group
.cg_item
),
1922 config_item_name(&dev
->dev_group
.cg_item
),
1928 static struct target_core_configfs_attribute target_core_attr_dev_udev_path
= {
1929 .attr
= { .ca_owner
= THIS_MODULE
,
1930 .ca_name
= "udev_path",
1931 .ca_mode
= S_IRUGO
| S_IWUSR
},
1932 .show
= target_core_show_dev_udev_path
,
1933 .store
= target_core_store_dev_udev_path
,
1936 static ssize_t
target_core_show_dev_enable(void *p
, char *page
)
1938 struct se_device
*dev
= p
;
1940 return snprintf(page
, PAGE_SIZE
, "%d\n", !!(dev
->dev_flags
& DF_CONFIGURED
));
1943 static ssize_t
target_core_store_dev_enable(
1948 struct se_device
*dev
= p
;
1952 ptr
= strstr(page
, "1");
1954 pr_err("For dev_enable ops, only valid value"
1959 ret
= target_configure_device(dev
);
1965 static struct target_core_configfs_attribute target_core_attr_dev_enable
= {
1966 .attr
= { .ca_owner
= THIS_MODULE
,
1967 .ca_name
= "enable",
1968 .ca_mode
= S_IRUGO
| S_IWUSR
},
1969 .show
= target_core_show_dev_enable
,
1970 .store
= target_core_store_dev_enable
,
1973 static ssize_t
target_core_show_alua_lu_gp(void *p
, char *page
)
1975 struct se_device
*dev
= p
;
1976 struct config_item
*lu_ci
;
1977 struct t10_alua_lu_gp
*lu_gp
;
1978 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1981 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1985 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1986 lu_gp
= lu_gp_mem
->lu_gp
;
1988 lu_ci
= &lu_gp
->lu_gp_group
.cg_item
;
1989 len
+= sprintf(page
, "LU Group Alias: %s\nLU Group ID: %hu\n",
1990 config_item_name(lu_ci
), lu_gp
->lu_gp_id
);
1992 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1997 static ssize_t
target_core_store_alua_lu_gp(
2002 struct se_device
*dev
= p
;
2003 struct se_hba
*hba
= dev
->se_hba
;
2004 struct t10_alua_lu_gp
*lu_gp
= NULL
, *lu_gp_new
= NULL
;
2005 struct t10_alua_lu_gp_member
*lu_gp_mem
;
2006 unsigned char buf
[LU_GROUP_NAME_BUF
];
2009 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
2013 if (count
> LU_GROUP_NAME_BUF
) {
2014 pr_err("ALUA LU Group Alias too large!\n");
2017 memset(buf
, 0, LU_GROUP_NAME_BUF
);
2018 memcpy(buf
, page
, count
);
2020 * Any ALUA logical unit alias besides "NULL" means we will be
2021 * making a new group association.
2023 if (strcmp(strstrip(buf
), "NULL")) {
2025 * core_alua_get_lu_gp_by_name() will increment reference to
2026 * struct t10_alua_lu_gp. This reference is released with
2027 * core_alua_get_lu_gp_by_name below().
2029 lu_gp_new
= core_alua_get_lu_gp_by_name(strstrip(buf
));
2034 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
2035 lu_gp
= lu_gp_mem
->lu_gp
;
2038 * Clearing an existing lu_gp association, and replacing
2042 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2043 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2045 config_item_name(&hba
->hba_group
.cg_item
),
2046 config_item_name(&dev
->dev_group
.cg_item
),
2047 config_item_name(&lu_gp
->lu_gp_group
.cg_item
),
2050 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
2051 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
2056 * Removing existing association of lu_gp_mem with lu_gp
2058 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
2062 * Associate lu_gp_mem with lu_gp_new.
2064 __core_alua_attach_lu_gp_mem(lu_gp_mem
, lu_gp_new
);
2065 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
2067 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2068 " core/alua/lu_gps/%s, ID: %hu\n",
2069 (move
) ? "Moving" : "Adding",
2070 config_item_name(&hba
->hba_group
.cg_item
),
2071 config_item_name(&dev
->dev_group
.cg_item
),
2072 config_item_name(&lu_gp_new
->lu_gp_group
.cg_item
),
2073 lu_gp_new
->lu_gp_id
);
2075 core_alua_put_lu_gp_from_name(lu_gp_new
);
2079 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp
= {
2080 .attr
= { .ca_owner
= THIS_MODULE
,
2081 .ca_name
= "alua_lu_gp",
2082 .ca_mode
= S_IRUGO
| S_IWUSR
},
2083 .show
= target_core_show_alua_lu_gp
,
2084 .store
= target_core_store_alua_lu_gp
,
2087 static ssize_t
target_core_show_dev_lba_map(void *p
, char *page
)
2089 struct se_device
*dev
= p
;
2090 struct t10_alua_lba_map
*map
;
2091 struct t10_alua_lba_map_member
*mem
;
2096 spin_lock(&dev
->t10_alua
.lba_map_lock
);
2097 if (!list_empty(&dev
->t10_alua
.lba_map_list
))
2098 bl
+= sprintf(b
+ bl
, "%u %u\n",
2099 dev
->t10_alua
.lba_map_segment_size
,
2100 dev
->t10_alua
.lba_map_segment_multiplier
);
2101 list_for_each_entry(map
, &dev
->t10_alua
.lba_map_list
, lba_map_list
) {
2102 bl
+= sprintf(b
+ bl
, "%llu %llu",
2103 map
->lba_map_first_lba
, map
->lba_map_last_lba
);
2104 list_for_each_entry(mem
, &map
->lba_map_mem_list
,
2106 switch (mem
->lba_map_mem_alua_state
) {
2107 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
:
2110 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
:
2113 case ALUA_ACCESS_STATE_STANDBY
:
2116 case ALUA_ACCESS_STATE_UNAVAILABLE
:
2123 bl
+= sprintf(b
+ bl
, " %d:%c",
2124 mem
->lba_map_mem_alua_pg_id
, state
);
2126 bl
+= sprintf(b
+ bl
, "\n");
2128 spin_unlock(&dev
->t10_alua
.lba_map_lock
);
2132 static ssize_t
target_core_store_dev_lba_map(
2137 struct se_device
*dev
= p
;
2138 struct t10_alua_lba_map
*lba_map
= NULL
;
2139 struct list_head lba_list
;
2140 char *map_entries
, *ptr
;
2142 int pg_num
= -1, pg
;
2143 int ret
= 0, num
= 0, pg_id
, alua_state
;
2144 unsigned long start_lba
= -1, end_lba
= -1;
2145 unsigned long segment_size
= -1, segment_mult
= -1;
2147 map_entries
= kstrdup(page
, GFP_KERNEL
);
2151 INIT_LIST_HEAD(&lba_list
);
2152 while ((ptr
= strsep(&map_entries
, "\n")) != NULL
) {
2157 if (sscanf(ptr
, "%lu %lu\n",
2158 &segment_size
, &segment_mult
) != 2) {
2159 pr_err("Invalid line %d\n", num
);
2166 if (sscanf(ptr
, "%lu %lu", &start_lba
, &end_lba
) != 2) {
2167 pr_err("Invalid line %d\n", num
);
2171 ptr
= strchr(ptr
, ' ');
2173 pr_err("Invalid line %d, missing end lba\n", num
);
2178 ptr
= strchr(ptr
, ' ');
2180 pr_err("Invalid line %d, missing state definitions\n",
2186 lba_map
= core_alua_allocate_lba_map(&lba_list
,
2187 start_lba
, end_lba
);
2188 if (IS_ERR(lba_map
)) {
2189 ret
= PTR_ERR(lba_map
);
2193 while (sscanf(ptr
, "%d:%c", &pg_id
, &state
) == 2) {
2196 alua_state
= ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
;
2199 alua_state
= ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
;
2202 alua_state
= ALUA_ACCESS_STATE_STANDBY
;
2205 alua_state
= ALUA_ACCESS_STATE_UNAVAILABLE
;
2208 pr_err("Invalid ALUA state '%c'\n", state
);
2213 ret
= core_alua_allocate_lba_map_mem(lba_map
,
2216 pr_err("Invalid target descriptor %d:%c "
2222 ptr
= strchr(ptr
, ' ');
2230 else if (pg
!= pg_num
) {
2231 pr_err("Only %d from %d port groups definitions "
2232 "at line %d\n", pg
, pg_num
, num
);
2240 core_alua_free_lba_map(&lba_list
);
2243 core_alua_set_lba_map(dev
, &lba_list
,
2244 segment_size
, segment_mult
);
2249 static struct target_core_configfs_attribute target_core_attr_dev_lba_map
= {
2250 .attr
= { .ca_owner
= THIS_MODULE
,
2251 .ca_name
= "lba_map",
2252 .ca_mode
= S_IRUGO
| S_IWUSR
},
2253 .show
= target_core_show_dev_lba_map
,
2254 .store
= target_core_store_dev_lba_map
,
2257 static struct configfs_attribute
*target_core_dev_attrs
[] = {
2258 &target_core_attr_dev_info
.attr
,
2259 &target_core_attr_dev_control
.attr
,
2260 &target_core_attr_dev_alias
.attr
,
2261 &target_core_attr_dev_udev_path
.attr
,
2262 &target_core_attr_dev_enable
.attr
,
2263 &target_core_attr_dev_alua_lu_gp
.attr
,
2264 &target_core_attr_dev_lba_map
.attr
,
2268 static void target_core_dev_release(struct config_item
*item
)
2270 struct config_group
*dev_cg
= to_config_group(item
);
2271 struct se_device
*dev
=
2272 container_of(dev_cg
, struct se_device
, dev_group
);
2274 kfree(dev_cg
->default_groups
);
2275 target_free_device(dev
);
2278 static ssize_t
target_core_dev_show(struct config_item
*item
,
2279 struct configfs_attribute
*attr
,
2282 struct config_group
*dev_cg
= to_config_group(item
);
2283 struct se_device
*dev
=
2284 container_of(dev_cg
, struct se_device
, dev_group
);
2285 struct target_core_configfs_attribute
*tc_attr
= container_of(
2286 attr
, struct target_core_configfs_attribute
, attr
);
2291 return tc_attr
->show(dev
, page
);
2294 static ssize_t
target_core_dev_store(struct config_item
*item
,
2295 struct configfs_attribute
*attr
,
2296 const char *page
, size_t count
)
2298 struct config_group
*dev_cg
= to_config_group(item
);
2299 struct se_device
*dev
=
2300 container_of(dev_cg
, struct se_device
, dev_group
);
2301 struct target_core_configfs_attribute
*tc_attr
= container_of(
2302 attr
, struct target_core_configfs_attribute
, attr
);
2304 if (!tc_attr
->store
)
2307 return tc_attr
->store(dev
, page
, count
);
2310 static struct configfs_item_operations target_core_dev_item_ops
= {
2311 .release
= target_core_dev_release
,
2312 .show_attribute
= target_core_dev_show
,
2313 .store_attribute
= target_core_dev_store
,
2316 TB_CIT_SETUP(dev
, &target_core_dev_item_ops
, NULL
, target_core_dev_attrs
);
2318 /* End functions for struct config_item_type tb_dev_cit */
2320 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2322 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp
, t10_alua_lu_gp
);
2323 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2324 static struct target_core_alua_lu_gp_attribute \
2325 target_core_alua_lu_gp_##_name = \
2326 __CONFIGFS_EATTR(_name, _mode, \
2327 target_core_alua_lu_gp_show_attr_##_name, \
2328 target_core_alua_lu_gp_store_attr_##_name);
2330 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2331 static struct target_core_alua_lu_gp_attribute \
2332 target_core_alua_lu_gp_##_name = \
2333 __CONFIGFS_EATTR_RO(_name, \
2334 target_core_alua_lu_gp_show_attr_##_name);
2339 static ssize_t
target_core_alua_lu_gp_show_attr_lu_gp_id(
2340 struct t10_alua_lu_gp
*lu_gp
,
2343 if (!lu_gp
->lu_gp_valid_id
)
2346 return sprintf(page
, "%hu\n", lu_gp
->lu_gp_id
);
2349 static ssize_t
target_core_alua_lu_gp_store_attr_lu_gp_id(
2350 struct t10_alua_lu_gp
*lu_gp
,
2354 struct config_group
*alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2355 unsigned long lu_gp_id
;
2358 ret
= kstrtoul(page
, 0, &lu_gp_id
);
2360 pr_err("kstrtoul() returned %d for"
2361 " lu_gp_id\n", ret
);
2364 if (lu_gp_id
> 0x0000ffff) {
2365 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2366 " 0x0000ffff\n", lu_gp_id
);
2370 ret
= core_alua_set_lu_gp_id(lu_gp
, (u16
)lu_gp_id
);
2374 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2375 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2376 config_item_name(&alua_lu_gp_cg
->cg_item
),
2382 SE_DEV_ALUA_LU_ATTR(lu_gp_id
, S_IRUGO
| S_IWUSR
);
2387 static ssize_t
target_core_alua_lu_gp_show_attr_members(
2388 struct t10_alua_lu_gp
*lu_gp
,
2391 struct se_device
*dev
;
2393 struct t10_alua_lu_gp_member
*lu_gp_mem
;
2394 ssize_t len
= 0, cur_len
;
2395 unsigned char buf
[LU_GROUP_NAME_BUF
];
2397 memset(buf
, 0, LU_GROUP_NAME_BUF
);
2399 spin_lock(&lu_gp
->lu_gp_lock
);
2400 list_for_each_entry(lu_gp_mem
, &lu_gp
->lu_gp_mem_list
, lu_gp_mem_list
) {
2401 dev
= lu_gp_mem
->lu_gp_mem_dev
;
2404 cur_len
= snprintf(buf
, LU_GROUP_NAME_BUF
, "%s/%s\n",
2405 config_item_name(&hba
->hba_group
.cg_item
),
2406 config_item_name(&dev
->dev_group
.cg_item
));
2407 cur_len
++; /* Extra byte for NULL terminator */
2409 if ((cur_len
+ len
) > PAGE_SIZE
) {
2410 pr_warn("Ran out of lu_gp_show_attr"
2411 "_members buffer\n");
2414 memcpy(page
+len
, buf
, cur_len
);
2417 spin_unlock(&lu_gp
->lu_gp_lock
);
2422 SE_DEV_ALUA_LU_ATTR_RO(members
);
2424 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp
, t10_alua_lu_gp
, lu_gp_group
);
2426 static struct configfs_attribute
*target_core_alua_lu_gp_attrs
[] = {
2427 &target_core_alua_lu_gp_lu_gp_id
.attr
,
2428 &target_core_alua_lu_gp_members
.attr
,
2432 static void target_core_alua_lu_gp_release(struct config_item
*item
)
2434 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2435 struct t10_alua_lu_gp
, lu_gp_group
);
2437 core_alua_free_lu_gp(lu_gp
);
2440 static struct configfs_item_operations target_core_alua_lu_gp_ops
= {
2441 .release
= target_core_alua_lu_gp_release
,
2442 .show_attribute
= target_core_alua_lu_gp_attr_show
,
2443 .store_attribute
= target_core_alua_lu_gp_attr_store
,
2446 static struct config_item_type target_core_alua_lu_gp_cit
= {
2447 .ct_item_ops
= &target_core_alua_lu_gp_ops
,
2448 .ct_attrs
= target_core_alua_lu_gp_attrs
,
2449 .ct_owner
= THIS_MODULE
,
2452 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2454 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2456 static struct config_group
*target_core_alua_create_lu_gp(
2457 struct config_group
*group
,
2460 struct t10_alua_lu_gp
*lu_gp
;
2461 struct config_group
*alua_lu_gp_cg
= NULL
;
2462 struct config_item
*alua_lu_gp_ci
= NULL
;
2464 lu_gp
= core_alua_allocate_lu_gp(name
, 0);
2468 alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2469 alua_lu_gp_ci
= &alua_lu_gp_cg
->cg_item
;
2471 config_group_init_type_name(alua_lu_gp_cg
, name
,
2472 &target_core_alua_lu_gp_cit
);
2474 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2475 " Group: core/alua/lu_gps/%s\n",
2476 config_item_name(alua_lu_gp_ci
));
2478 return alua_lu_gp_cg
;
2482 static void target_core_alua_drop_lu_gp(
2483 struct config_group
*group
,
2484 struct config_item
*item
)
2486 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2487 struct t10_alua_lu_gp
, lu_gp_group
);
2489 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2490 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2491 config_item_name(item
), lu_gp
->lu_gp_id
);
2493 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2494 * -> target_core_alua_lu_gp_release()
2496 config_item_put(item
);
2499 static struct configfs_group_operations target_core_alua_lu_gps_group_ops
= {
2500 .make_group
= &target_core_alua_create_lu_gp
,
2501 .drop_item
= &target_core_alua_drop_lu_gp
,
2504 static struct config_item_type target_core_alua_lu_gps_cit
= {
2505 .ct_item_ops
= NULL
,
2506 .ct_group_ops
= &target_core_alua_lu_gps_group_ops
,
2507 .ct_owner
= THIS_MODULE
,
2510 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2512 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2514 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
);
2515 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2516 static struct target_core_alua_tg_pt_gp_attribute \
2517 target_core_alua_tg_pt_gp_##_name = \
2518 __CONFIGFS_EATTR(_name, _mode, \
2519 target_core_alua_tg_pt_gp_show_attr_##_name, \
2520 target_core_alua_tg_pt_gp_store_attr_##_name);
2522 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2523 static struct target_core_alua_tg_pt_gp_attribute \
2524 target_core_alua_tg_pt_gp_##_name = \
2525 __CONFIGFS_EATTR_RO(_name, \
2526 target_core_alua_tg_pt_gp_show_attr_##_name);
2531 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2532 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2535 return sprintf(page
, "%d\n",
2536 atomic_read(&tg_pt_gp
->tg_pt_gp_alua_access_state
));
2539 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2540 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2544 struct se_device
*dev
= tg_pt_gp
->tg_pt_gp_dev
;
2548 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2549 pr_err("Unable to do implicit ALUA on non valid"
2550 " tg_pt_gp ID: %hu\n", tg_pt_gp
->tg_pt_gp_valid_id
);
2553 if (!(dev
->dev_flags
& DF_CONFIGURED
)) {
2554 pr_err("Unable to set alua_access_state while device is"
2555 " not configured\n");
2559 ret
= kstrtoul(page
, 0, &tmp
);
2561 pr_err("Unable to extract new ALUA access state from"
2565 new_state
= (int)tmp
;
2567 if (!(tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_IMPLICIT_ALUA
)) {
2568 pr_err("Unable to process implicit configfs ALUA"
2569 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2572 if (tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_EXPLICIT_ALUA
&&
2573 new_state
== ALUA_ACCESS_STATE_LBA_DEPENDENT
) {
2574 /* LBA DEPENDENT is only allowed with implicit ALUA */
2575 pr_err("Unable to process implicit configfs ALUA transition"
2576 " while explicit ALUA management is enabled\n");
2580 ret
= core_alua_do_port_transition(tg_pt_gp
, dev
,
2581 NULL
, NULL
, new_state
, 0);
2582 return (!ret
) ? count
: -EINVAL
;
2585 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state
, S_IRUGO
| S_IWUSR
);
2588 * alua_access_status
2590 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2591 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2594 return sprintf(page
, "%s\n",
2595 core_alua_dump_status(tg_pt_gp
->tg_pt_gp_alua_access_status
));
2598 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2599 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2604 int new_status
, ret
;
2606 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2607 pr_err("Unable to do set ALUA access status on non"
2608 " valid tg_pt_gp ID: %hu\n",
2609 tg_pt_gp
->tg_pt_gp_valid_id
);
2613 ret
= kstrtoul(page
, 0, &tmp
);
2615 pr_err("Unable to extract new ALUA access status"
2616 " from %s\n", page
);
2619 new_status
= (int)tmp
;
2621 if ((new_status
!= ALUA_STATUS_NONE
) &&
2622 (new_status
!= ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG
) &&
2623 (new_status
!= ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA
)) {
2624 pr_err("Illegal ALUA access status: 0x%02x\n",
2629 tg_pt_gp
->tg_pt_gp_alua_access_status
= new_status
;
2633 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status
, S_IRUGO
| S_IWUSR
);
2638 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2639 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2642 return core_alua_show_access_type(tg_pt_gp
, page
);
2645 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2646 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2650 return core_alua_store_access_type(tg_pt_gp
, page
, count
);
2653 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type
, S_IRUGO
| S_IWUSR
);
2656 * alua_supported_states
2659 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2660 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2661 struct t10_alua_tg_pt_gp *t, char *p) \
2663 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2666 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2667 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2668 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2670 unsigned long tmp; \
2673 if (!t->tg_pt_gp_valid_id) { \
2674 pr_err("Unable to do set ##_name ALUA state on non" \
2675 " valid tg_pt_gp ID: %hu\n", \
2676 t->tg_pt_gp_valid_id); \
2680 ret = kstrtoul(p, 0, &tmp); \
2682 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2686 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2697 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning
,
2698 tg_pt_gp_alua_supported_states
, ALUA_T_SUP
);
2699 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning
,
2700 tg_pt_gp_alua_supported_states
, ALUA_T_SUP
);
2701 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning
, S_IRUGO
| S_IWUSR
);
2703 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline
,
2704 tg_pt_gp_alua_supported_states
, ALUA_O_SUP
);
2705 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline
,
2706 tg_pt_gp_alua_supported_states
, ALUA_O_SUP
);
2707 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline
, S_IRUGO
| S_IWUSR
);
2709 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent
,
2710 tg_pt_gp_alua_supported_states
, ALUA_LBD_SUP
);
2711 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent
,
2712 tg_pt_gp_alua_supported_states
, ALUA_LBD_SUP
);
2713 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent
, S_IRUGO
);
2715 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable
,
2716 tg_pt_gp_alua_supported_states
, ALUA_U_SUP
);
2717 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable
,
2718 tg_pt_gp_alua_supported_states
, ALUA_U_SUP
);
2719 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable
, S_IRUGO
| S_IWUSR
);
2721 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby
,
2722 tg_pt_gp_alua_supported_states
, ALUA_S_SUP
);
2723 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby
,
2724 tg_pt_gp_alua_supported_states
, ALUA_S_SUP
);
2725 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby
, S_IRUGO
| S_IWUSR
);
2727 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized
,
2728 tg_pt_gp_alua_supported_states
, ALUA_AO_SUP
);
2729 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized
,
2730 tg_pt_gp_alua_supported_states
, ALUA_AO_SUP
);
2731 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized
, S_IRUGO
| S_IWUSR
);
2733 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized
,
2734 tg_pt_gp_alua_supported_states
, ALUA_AN_SUP
);
2735 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized
,
2736 tg_pt_gp_alua_supported_states
, ALUA_AN_SUP
);
2737 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized
, S_IRUGO
| S_IWUSR
);
2740 * alua_write_metadata
2742 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2743 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2746 return sprintf(page
, "%d\n", tg_pt_gp
->tg_pt_gp_write_metadata
);
2749 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2750 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2757 ret
= kstrtoul(page
, 0, &tmp
);
2759 pr_err("Unable to extract alua_write_metadata\n");
2763 if ((tmp
!= 0) && (tmp
!= 1)) {
2764 pr_err("Illegal value for alua_write_metadata:"
2768 tg_pt_gp
->tg_pt_gp_write_metadata
= (int)tmp
;
2773 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata
, S_IRUGO
| S_IWUSR
);
2780 static ssize_t
target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2781 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2784 return core_alua_show_nonop_delay_msecs(tg_pt_gp
, page
);
2788 static ssize_t
target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2789 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2793 return core_alua_store_nonop_delay_msecs(tg_pt_gp
, page
, count
);
2796 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs
, S_IRUGO
| S_IWUSR
);
2801 static ssize_t
target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2802 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2805 return core_alua_show_trans_delay_msecs(tg_pt_gp
, page
);
2808 static ssize_t
target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2809 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2813 return core_alua_store_trans_delay_msecs(tg_pt_gp
, page
, count
);
2816 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs
, S_IRUGO
| S_IWUSR
);
2819 * implicit_trans_secs
2821 static ssize_t
target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2822 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2825 return core_alua_show_implicit_trans_secs(tg_pt_gp
, page
);
2828 static ssize_t
target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2829 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2833 return core_alua_store_implicit_trans_secs(tg_pt_gp
, page
, count
);
2836 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs
, S_IRUGO
| S_IWUSR
);
2842 static ssize_t
target_core_alua_tg_pt_gp_show_attr_preferred(
2843 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2846 return core_alua_show_preferred_bit(tg_pt_gp
, page
);
2849 static ssize_t
target_core_alua_tg_pt_gp_store_attr_preferred(
2850 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2854 return core_alua_store_preferred_bit(tg_pt_gp
, page
, count
);
2857 SE_DEV_ALUA_TG_PT_ATTR(preferred
, S_IRUGO
| S_IWUSR
);
2862 static ssize_t
target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2863 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2866 if (!tg_pt_gp
->tg_pt_gp_valid_id
)
2869 return sprintf(page
, "%hu\n", tg_pt_gp
->tg_pt_gp_id
);
2872 static ssize_t
target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2873 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2877 struct config_group
*alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2878 unsigned long tg_pt_gp_id
;
2881 ret
= kstrtoul(page
, 0, &tg_pt_gp_id
);
2883 pr_err("kstrtoul() returned %d for"
2884 " tg_pt_gp_id\n", ret
);
2887 if (tg_pt_gp_id
> 0x0000ffff) {
2888 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2889 " 0x0000ffff\n", tg_pt_gp_id
);
2893 ret
= core_alua_set_tg_pt_gp_id(tg_pt_gp
, (u16
)tg_pt_gp_id
);
2897 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2898 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2899 config_item_name(&alua_tg_pt_gp_cg
->cg_item
),
2900 tg_pt_gp
->tg_pt_gp_id
);
2905 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id
, S_IRUGO
| S_IWUSR
);
2910 static ssize_t
target_core_alua_tg_pt_gp_show_attr_members(
2911 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2915 ssize_t len
= 0, cur_len
;
2916 unsigned char buf
[TG_PT_GROUP_NAME_BUF
];
2918 memset(buf
, 0, TG_PT_GROUP_NAME_BUF
);
2920 spin_lock(&tg_pt_gp
->tg_pt_gp_lock
);
2921 list_for_each_entry(lun
, &tg_pt_gp
->tg_pt_gp_lun_list
,
2922 lun_tg_pt_gp_link
) {
2923 struct se_portal_group
*tpg
= lun
->lun_tpg
;
2925 cur_len
= snprintf(buf
, TG_PT_GROUP_NAME_BUF
, "%s/%s/tpgt_%hu"
2926 "/%s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
2927 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
),
2928 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
2929 config_item_name(&lun
->lun_group
.cg_item
));
2930 cur_len
++; /* Extra byte for NULL terminator */
2932 if ((cur_len
+ len
) > PAGE_SIZE
) {
2933 pr_warn("Ran out of lu_gp_show_attr"
2934 "_members buffer\n");
2937 memcpy(page
+len
, buf
, cur_len
);
2940 spin_unlock(&tg_pt_gp
->tg_pt_gp_lock
);
2945 SE_DEV_ALUA_TG_PT_ATTR_RO(members
);
2947 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
,
2950 static struct configfs_attribute
*target_core_alua_tg_pt_gp_attrs
[] = {
2951 &target_core_alua_tg_pt_gp_alua_access_state
.attr
,
2952 &target_core_alua_tg_pt_gp_alua_access_status
.attr
,
2953 &target_core_alua_tg_pt_gp_alua_access_type
.attr
,
2954 &target_core_alua_tg_pt_gp_alua_support_transitioning
.attr
,
2955 &target_core_alua_tg_pt_gp_alua_support_offline
.attr
,
2956 &target_core_alua_tg_pt_gp_alua_support_lba_dependent
.attr
,
2957 &target_core_alua_tg_pt_gp_alua_support_unavailable
.attr
,
2958 &target_core_alua_tg_pt_gp_alua_support_standby
.attr
,
2959 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized
.attr
,
2960 &target_core_alua_tg_pt_gp_alua_support_active_optimized
.attr
,
2961 &target_core_alua_tg_pt_gp_alua_write_metadata
.attr
,
2962 &target_core_alua_tg_pt_gp_nonop_delay_msecs
.attr
,
2963 &target_core_alua_tg_pt_gp_trans_delay_msecs
.attr
,
2964 &target_core_alua_tg_pt_gp_implicit_trans_secs
.attr
,
2965 &target_core_alua_tg_pt_gp_preferred
.attr
,
2966 &target_core_alua_tg_pt_gp_tg_pt_gp_id
.attr
,
2967 &target_core_alua_tg_pt_gp_members
.attr
,
2971 static void target_core_alua_tg_pt_gp_release(struct config_item
*item
)
2973 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2974 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2976 core_alua_free_tg_pt_gp(tg_pt_gp
);
2979 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops
= {
2980 .release
= target_core_alua_tg_pt_gp_release
,
2981 .show_attribute
= target_core_alua_tg_pt_gp_attr_show
,
2982 .store_attribute
= target_core_alua_tg_pt_gp_attr_store
,
2985 static struct config_item_type target_core_alua_tg_pt_gp_cit
= {
2986 .ct_item_ops
= &target_core_alua_tg_pt_gp_ops
,
2987 .ct_attrs
= target_core_alua_tg_pt_gp_attrs
,
2988 .ct_owner
= THIS_MODULE
,
2991 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2993 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2995 static struct config_group
*target_core_alua_create_tg_pt_gp(
2996 struct config_group
*group
,
2999 struct t10_alua
*alua
= container_of(group
, struct t10_alua
,
3000 alua_tg_pt_gps_group
);
3001 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
3002 struct config_group
*alua_tg_pt_gp_cg
= NULL
;
3003 struct config_item
*alua_tg_pt_gp_ci
= NULL
;
3005 tg_pt_gp
= core_alua_allocate_tg_pt_gp(alua
->t10_dev
, name
, 0);
3009 alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
3010 alua_tg_pt_gp_ci
= &alua_tg_pt_gp_cg
->cg_item
;
3012 config_group_init_type_name(alua_tg_pt_gp_cg
, name
,
3013 &target_core_alua_tg_pt_gp_cit
);
3015 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3016 " Group: alua/tg_pt_gps/%s\n",
3017 config_item_name(alua_tg_pt_gp_ci
));
3019 return alua_tg_pt_gp_cg
;
3022 static void target_core_alua_drop_tg_pt_gp(
3023 struct config_group
*group
,
3024 struct config_item
*item
)
3026 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
3027 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
3029 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3030 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3031 config_item_name(item
), tg_pt_gp
->tg_pt_gp_id
);
3033 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3034 * -> target_core_alua_tg_pt_gp_release().
3036 config_item_put(item
);
3039 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops
= {
3040 .make_group
= &target_core_alua_create_tg_pt_gp
,
3041 .drop_item
= &target_core_alua_drop_tg_pt_gp
,
3044 TB_CIT_SETUP(dev_alua_tg_pt_gps
, NULL
, &target_core_alua_tg_pt_gps_group_ops
, NULL
);
3046 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3048 /* Start functions for struct config_item_type target_core_alua_cit */
3051 * target_core_alua_cit is a ConfigFS group that lives under
3052 * /sys/kernel/config/target/core/alua. There are default groups
3053 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3054 * target_core_alua_cit in target_core_init_configfs() below.
3056 static struct config_item_type target_core_alua_cit
= {
3057 .ct_item_ops
= NULL
,
3059 .ct_owner
= THIS_MODULE
,
3062 /* End functions for struct config_item_type target_core_alua_cit */
3064 /* Start functions for struct config_item_type tb_dev_stat_cit */
3066 static struct config_group
*target_core_stat_mkdir(
3067 struct config_group
*group
,
3070 return ERR_PTR(-ENOSYS
);
3073 static void target_core_stat_rmdir(
3074 struct config_group
*group
,
3075 struct config_item
*item
)
3080 static struct configfs_group_operations target_core_stat_group_ops
= {
3081 .make_group
= &target_core_stat_mkdir
,
3082 .drop_item
= &target_core_stat_rmdir
,
3085 TB_CIT_SETUP(dev_stat
, NULL
, &target_core_stat_group_ops
, NULL
);
3087 /* End functions for struct config_item_type tb_dev_stat_cit */
3089 /* Start functions for struct config_item_type target_core_hba_cit */
3091 static struct config_group
*target_core_make_subdev(
3092 struct config_group
*group
,
3095 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
3096 struct config_item
*hba_ci
= &group
->cg_item
;
3097 struct se_hba
*hba
= item_to_hba(hba_ci
);
3098 struct target_backend
*tb
= hba
->backend
;
3099 struct se_device
*dev
;
3100 struct config_group
*dev_cg
= NULL
, *tg_pt_gp_cg
= NULL
;
3101 struct config_group
*dev_stat_grp
= NULL
;
3102 int errno
= -ENOMEM
, ret
;
3104 ret
= mutex_lock_interruptible(&hba
->hba_access_mutex
);
3106 return ERR_PTR(ret
);
3108 dev
= target_alloc_device(hba
, name
);
3112 dev_cg
= &dev
->dev_group
;
3114 dev_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 6,
3116 if (!dev_cg
->default_groups
)
3117 goto out_free_device
;
3119 config_group_init_type_name(dev_cg
, name
, &tb
->tb_dev_cit
);
3120 config_group_init_type_name(&dev
->dev_attrib
.da_group
, "attrib",
3121 &tb
->tb_dev_attrib_cit
);
3122 config_group_init_type_name(&dev
->dev_pr_group
, "pr",
3123 &tb
->tb_dev_pr_cit
);
3124 config_group_init_type_name(&dev
->t10_wwn
.t10_wwn_group
, "wwn",
3125 &tb
->tb_dev_wwn_cit
);
3126 config_group_init_type_name(&dev
->t10_alua
.alua_tg_pt_gps_group
,
3127 "alua", &tb
->tb_dev_alua_tg_pt_gps_cit
);
3128 config_group_init_type_name(&dev
->dev_stat_grps
.stat_group
,
3129 "statistics", &tb
->tb_dev_stat_cit
);
3131 dev_cg
->default_groups
[0] = &dev
->dev_attrib
.da_group
;
3132 dev_cg
->default_groups
[1] = &dev
->dev_pr_group
;
3133 dev_cg
->default_groups
[2] = &dev
->t10_wwn
.t10_wwn_group
;
3134 dev_cg
->default_groups
[3] = &dev
->t10_alua
.alua_tg_pt_gps_group
;
3135 dev_cg
->default_groups
[4] = &dev
->dev_stat_grps
.stat_group
;
3136 dev_cg
->default_groups
[5] = NULL
;
3138 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3140 tg_pt_gp
= core_alua_allocate_tg_pt_gp(dev
, "default_tg_pt_gp", 1);
3142 goto out_free_dev_cg_default_groups
;
3143 dev
->t10_alua
.default_tg_pt_gp
= tg_pt_gp
;
3145 tg_pt_gp_cg
= &dev
->t10_alua
.alua_tg_pt_gps_group
;
3146 tg_pt_gp_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
3148 if (!tg_pt_gp_cg
->default_groups
) {
3149 pr_err("Unable to allocate tg_pt_gp_cg->"
3150 "default_groups\n");
3151 goto out_free_tg_pt_gp
;
3154 config_group_init_type_name(&tg_pt_gp
->tg_pt_gp_group
,
3155 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit
);
3156 tg_pt_gp_cg
->default_groups
[0] = &tg_pt_gp
->tg_pt_gp_group
;
3157 tg_pt_gp_cg
->default_groups
[1] = NULL
;
3159 * Add core/$HBA/$DEV/statistics/ default groups
3161 dev_stat_grp
= &dev
->dev_stat_grps
.stat_group
;
3162 dev_stat_grp
->default_groups
= kmalloc(sizeof(struct config_group
*) * 4,
3164 if (!dev_stat_grp
->default_groups
) {
3165 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
3166 goto out_free_tg_pt_gp_cg_default_groups
;
3168 target_stat_setup_dev_default_groups(dev
);
3170 mutex_unlock(&hba
->hba_access_mutex
);
3173 out_free_tg_pt_gp_cg_default_groups
:
3174 kfree(tg_pt_gp_cg
->default_groups
);
3176 core_alua_free_tg_pt_gp(tg_pt_gp
);
3177 out_free_dev_cg_default_groups
:
3178 kfree(dev_cg
->default_groups
);
3180 target_free_device(dev
);
3182 mutex_unlock(&hba
->hba_access_mutex
);
3183 return ERR_PTR(errno
);
3186 static void target_core_drop_subdev(
3187 struct config_group
*group
,
3188 struct config_item
*item
)
3190 struct config_group
*dev_cg
= to_config_group(item
);
3191 struct se_device
*dev
=
3192 container_of(dev_cg
, struct se_device
, dev_group
);
3194 struct config_item
*df_item
;
3195 struct config_group
*tg_pt_gp_cg
, *dev_stat_grp
;
3198 hba
= item_to_hba(&dev
->se_hba
->hba_group
.cg_item
);
3200 mutex_lock(&hba
->hba_access_mutex
);
3202 dev_stat_grp
= &dev
->dev_stat_grps
.stat_group
;
3203 for (i
= 0; dev_stat_grp
->default_groups
[i
]; i
++) {
3204 df_item
= &dev_stat_grp
->default_groups
[i
]->cg_item
;
3205 dev_stat_grp
->default_groups
[i
] = NULL
;
3206 config_item_put(df_item
);
3208 kfree(dev_stat_grp
->default_groups
);
3210 tg_pt_gp_cg
= &dev
->t10_alua
.alua_tg_pt_gps_group
;
3211 for (i
= 0; tg_pt_gp_cg
->default_groups
[i
]; i
++) {
3212 df_item
= &tg_pt_gp_cg
->default_groups
[i
]->cg_item
;
3213 tg_pt_gp_cg
->default_groups
[i
] = NULL
;
3214 config_item_put(df_item
);
3216 kfree(tg_pt_gp_cg
->default_groups
);
3218 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3219 * directly from target_core_alua_tg_pt_gp_release().
3221 dev
->t10_alua
.default_tg_pt_gp
= NULL
;
3223 for (i
= 0; dev_cg
->default_groups
[i
]; i
++) {
3224 df_item
= &dev_cg
->default_groups
[i
]->cg_item
;
3225 dev_cg
->default_groups
[i
] = NULL
;
3226 config_item_put(df_item
);
3229 * se_dev is released from target_core_dev_item_ops->release()
3231 config_item_put(item
);
3232 mutex_unlock(&hba
->hba_access_mutex
);
3235 static struct configfs_group_operations target_core_hba_group_ops
= {
3236 .make_group
= target_core_make_subdev
,
3237 .drop_item
= target_core_drop_subdev
,
3240 CONFIGFS_EATTR_STRUCT(target_core_hba
, se_hba
);
3241 #define SE_HBA_ATTR(_name, _mode) \
3242 static struct target_core_hba_attribute \
3243 target_core_hba_##_name = \
3244 __CONFIGFS_EATTR(_name, _mode, \
3245 target_core_hba_show_attr_##_name, \
3246 target_core_hba_store_attr_##_name);
3248 #define SE_HBA_ATTR_RO(_name) \
3249 static struct target_core_hba_attribute \
3250 target_core_hba_##_name = \
3251 __CONFIGFS_EATTR_RO(_name, \
3252 target_core_hba_show_attr_##_name);
3254 static ssize_t
target_core_hba_show_attr_hba_info(
3258 return sprintf(page
, "HBA Index: %d plugin: %s version: %s\n",
3259 hba
->hba_id
, hba
->backend
->ops
->name
,
3260 TARGET_CORE_VERSION
);
3263 SE_HBA_ATTR_RO(hba_info
);
3265 static ssize_t
target_core_hba_show_attr_hba_mode(struct se_hba
*hba
,
3270 if (hba
->hba_flags
& HBA_FLAGS_PSCSI_MODE
)
3273 return sprintf(page
, "%d\n", hba_mode
);
3276 static ssize_t
target_core_hba_store_attr_hba_mode(struct se_hba
*hba
,
3277 const char *page
, size_t count
)
3279 unsigned long mode_flag
;
3282 if (hba
->backend
->ops
->pmode_enable_hba
== NULL
)
3285 ret
= kstrtoul(page
, 0, &mode_flag
);
3287 pr_err("Unable to extract hba mode flag: %d\n", ret
);
3291 if (hba
->dev_count
) {
3292 pr_err("Unable to set hba_mode with active devices\n");
3296 ret
= hba
->backend
->ops
->pmode_enable_hba(hba
, mode_flag
);
3300 hba
->hba_flags
|= HBA_FLAGS_PSCSI_MODE
;
3302 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
3307 SE_HBA_ATTR(hba_mode
, S_IRUGO
| S_IWUSR
);
3309 CONFIGFS_EATTR_OPS(target_core_hba
, se_hba
, hba_group
);
3311 static void target_core_hba_release(struct config_item
*item
)
3313 struct se_hba
*hba
= container_of(to_config_group(item
),
3314 struct se_hba
, hba_group
);
3315 core_delete_hba(hba
);
3318 static struct configfs_attribute
*target_core_hba_attrs
[] = {
3319 &target_core_hba_hba_info
.attr
,
3320 &target_core_hba_hba_mode
.attr
,
3324 static struct configfs_item_operations target_core_hba_item_ops
= {
3325 .release
= target_core_hba_release
,
3326 .show_attribute
= target_core_hba_attr_show
,
3327 .store_attribute
= target_core_hba_attr_store
,
3330 static struct config_item_type target_core_hba_cit
= {
3331 .ct_item_ops
= &target_core_hba_item_ops
,
3332 .ct_group_ops
= &target_core_hba_group_ops
,
3333 .ct_attrs
= target_core_hba_attrs
,
3334 .ct_owner
= THIS_MODULE
,
3337 static struct config_group
*target_core_call_addhbatotarget(
3338 struct config_group
*group
,
3341 char *se_plugin_str
, *str
, *str2
;
3343 char buf
[TARGET_CORE_NAME_MAX_LEN
];
3344 unsigned long plugin_dep_id
= 0;
3347 memset(buf
, 0, TARGET_CORE_NAME_MAX_LEN
);
3348 if (strlen(name
) >= TARGET_CORE_NAME_MAX_LEN
) {
3349 pr_err("Passed *name strlen(): %d exceeds"
3350 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name
),
3351 TARGET_CORE_NAME_MAX_LEN
);
3352 return ERR_PTR(-ENAMETOOLONG
);
3354 snprintf(buf
, TARGET_CORE_NAME_MAX_LEN
, "%s", name
);
3356 str
= strstr(buf
, "_");
3358 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3359 return ERR_PTR(-EINVAL
);
3361 se_plugin_str
= buf
;
3363 * Special case for subsystem plugins that have "_" in their names.
3364 * Namely rd_direct and rd_mcp..
3366 str2
= strstr(str
+1, "_");
3368 *str2
= '\0'; /* Terminate for *se_plugin_str */
3369 str2
++; /* Skip to start of plugin dependent ID */
3372 *str
= '\0'; /* Terminate for *se_plugin_str */
3373 str
++; /* Skip to start of plugin dependent ID */
3376 ret
= kstrtoul(str
, 0, &plugin_dep_id
);
3378 pr_err("kstrtoul() returned %d for"
3379 " plugin_dep_id\n", ret
);
3380 return ERR_PTR(ret
);
3383 * Load up TCM subsystem plugins if they have not already been loaded.
3385 transport_subsystem_check_init();
3387 hba
= core_alloc_hba(se_plugin_str
, plugin_dep_id
, 0);
3389 return ERR_CAST(hba
);
3391 config_group_init_type_name(&hba
->hba_group
, name
,
3392 &target_core_hba_cit
);
3394 return &hba
->hba_group
;
3397 static void target_core_call_delhbafromtarget(
3398 struct config_group
*group
,
3399 struct config_item
*item
)
3402 * core_delete_hba() is called from target_core_hba_item_ops->release()
3403 * -> target_core_hba_release()
3405 config_item_put(item
);
3408 static struct configfs_group_operations target_core_group_ops
= {
3409 .make_group
= target_core_call_addhbatotarget
,
3410 .drop_item
= target_core_call_delhbafromtarget
,
3413 static struct config_item_type target_core_cit
= {
3414 .ct_item_ops
= NULL
,
3415 .ct_group_ops
= &target_core_group_ops
,
3417 .ct_owner
= THIS_MODULE
,
3420 /* Stop functions for struct config_item_type target_core_hba_cit */
3422 void target_setup_backend_cits(struct target_backend
*tb
)
3424 target_core_setup_dev_cit(tb
);
3425 target_core_setup_dev_attrib_cit(tb
);
3426 target_core_setup_dev_pr_cit(tb
);
3427 target_core_setup_dev_wwn_cit(tb
);
3428 target_core_setup_dev_alua_tg_pt_gps_cit(tb
);
3429 target_core_setup_dev_stat_cit(tb
);
3432 static int __init
target_core_init_configfs(void)
3434 struct config_group
*target_cg
, *hba_cg
= NULL
, *alua_cg
= NULL
;
3435 struct config_group
*lu_gp_cg
= NULL
;
3436 struct configfs_subsystem
*subsys
= &target_core_fabrics
;
3437 struct t10_alua_lu_gp
*lu_gp
;
3440 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3441 " Engine: %s on %s/%s on "UTS_RELEASE
"\n",
3442 TARGET_CORE_VERSION
, utsname()->sysname
, utsname()->machine
);
3444 config_group_init(&subsys
->su_group
);
3445 mutex_init(&subsys
->su_mutex
);
3447 ret
= init_se_kmem_caches();
3451 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3452 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3454 target_cg
= &subsys
->su_group
;
3455 target_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
3457 if (!target_cg
->default_groups
) {
3458 pr_err("Unable to allocate target_cg->default_groups\n");
3463 config_group_init_type_name(&target_core_hbagroup
,
3464 "core", &target_core_cit
);
3465 target_cg
->default_groups
[0] = &target_core_hbagroup
;
3466 target_cg
->default_groups
[1] = NULL
;
3468 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3470 hba_cg
= &target_core_hbagroup
;
3471 hba_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
3473 if (!hba_cg
->default_groups
) {
3474 pr_err("Unable to allocate hba_cg->default_groups\n");
3478 config_group_init_type_name(&alua_group
,
3479 "alua", &target_core_alua_cit
);
3480 hba_cg
->default_groups
[0] = &alua_group
;
3481 hba_cg
->default_groups
[1] = NULL
;
3483 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3484 * groups under /sys/kernel/config/target/core/alua/
3486 alua_cg
= &alua_group
;
3487 alua_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
3489 if (!alua_cg
->default_groups
) {
3490 pr_err("Unable to allocate alua_cg->default_groups\n");
3495 config_group_init_type_name(&alua_lu_gps_group
,
3496 "lu_gps", &target_core_alua_lu_gps_cit
);
3497 alua_cg
->default_groups
[0] = &alua_lu_gps_group
;
3498 alua_cg
->default_groups
[1] = NULL
;
3500 * Add core/alua/lu_gps/default_lu_gp
3502 lu_gp
= core_alua_allocate_lu_gp("default_lu_gp", 1);
3503 if (IS_ERR(lu_gp
)) {
3508 lu_gp_cg
= &alua_lu_gps_group
;
3509 lu_gp_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
3511 if (!lu_gp_cg
->default_groups
) {
3512 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3517 config_group_init_type_name(&lu_gp
->lu_gp_group
, "default_lu_gp",
3518 &target_core_alua_lu_gp_cit
);
3519 lu_gp_cg
->default_groups
[0] = &lu_gp
->lu_gp_group
;
3520 lu_gp_cg
->default_groups
[1] = NULL
;
3521 default_lu_gp
= lu_gp
;
3523 * Register the target_core_mod subsystem with configfs.
3525 ret
= configfs_register_subsystem(subsys
);
3527 pr_err("Error %d while registering subsystem %s\n",
3528 ret
, subsys
->su_group
.cg_item
.ci_namebuf
);
3531 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3532 " Infrastructure: "TARGET_CORE_VERSION
" on %s/%s"
3533 " on "UTS_RELEASE
"\n", utsname()->sysname
, utsname()->machine
);
3535 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3537 ret
= rd_module_init();
3541 ret
= core_dev_setup_virtual_lun0();
3545 ret
= target_xcopy_setup_pt();
3552 configfs_unregister_subsystem(subsys
);
3553 core_dev_release_virtual_lun0();
3556 if (default_lu_gp
) {
3557 core_alua_free_lu_gp(default_lu_gp
);
3558 default_lu_gp
= NULL
;
3561 kfree(lu_gp_cg
->default_groups
);
3563 kfree(alua_cg
->default_groups
);
3565 kfree(hba_cg
->default_groups
);
3566 kfree(target_cg
->default_groups
);
3567 release_se_kmem_caches();
3571 static void __exit
target_core_exit_configfs(void)
3573 struct config_group
*hba_cg
, *alua_cg
, *lu_gp_cg
;
3574 struct config_item
*item
;
3577 lu_gp_cg
= &alua_lu_gps_group
;
3578 for (i
= 0; lu_gp_cg
->default_groups
[i
]; i
++) {
3579 item
= &lu_gp_cg
->default_groups
[i
]->cg_item
;
3580 lu_gp_cg
->default_groups
[i
] = NULL
;
3581 config_item_put(item
);
3583 kfree(lu_gp_cg
->default_groups
);
3584 lu_gp_cg
->default_groups
= NULL
;
3586 alua_cg
= &alua_group
;
3587 for (i
= 0; alua_cg
->default_groups
[i
]; i
++) {
3588 item
= &alua_cg
->default_groups
[i
]->cg_item
;
3589 alua_cg
->default_groups
[i
] = NULL
;
3590 config_item_put(item
);
3592 kfree(alua_cg
->default_groups
);
3593 alua_cg
->default_groups
= NULL
;
3595 hba_cg
= &target_core_hbagroup
;
3596 for (i
= 0; hba_cg
->default_groups
[i
]; i
++) {
3597 item
= &hba_cg
->default_groups
[i
]->cg_item
;
3598 hba_cg
->default_groups
[i
] = NULL
;
3599 config_item_put(item
);
3601 kfree(hba_cg
->default_groups
);
3602 hba_cg
->default_groups
= NULL
;
3604 * We expect subsys->su_group.default_groups to be released
3605 * by configfs subsystem provider logic..
3607 configfs_unregister_subsystem(&target_core_fabrics
);
3608 kfree(target_core_fabrics
.su_group
.default_groups
);
3610 core_alua_free_lu_gp(default_lu_gp
);
3611 default_lu_gp
= NULL
;
3613 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3614 " Infrastructure\n");
3616 core_dev_release_virtual_lun0();
3618 target_xcopy_release_pt();
3619 release_se_kmem_caches();
3622 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3623 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3624 MODULE_LICENSE("GPL");
3626 module_init(target_core_init_configfs
);
3627 module_exit(target_core_exit_configfs
);