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>
44 #include "target_core_internal.h"
45 #include "target_core_alua.h"
46 #include "target_core_pr.h"
47 #include "target_core_rd.h"
48 #include "target_core_xcopy.h"
50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
51 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
53 struct config_item_type *cit = &tb->tb_##_name##_cit; \
55 cit->ct_item_ops = _item_ops; \
56 cit->ct_group_ops = _group_ops; \
57 cit->ct_attrs = _attrs; \
58 cit->ct_owner = tb->ops->owner; \
59 pr_debug("Setup generic %s\n", __stringify(_name)); \
62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
63 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
65 struct config_item_type *cit = &tb->tb_##_name##_cit; \
67 cit->ct_item_ops = _item_ops; \
68 cit->ct_group_ops = _group_ops; \
69 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
70 cit->ct_owner = tb->ops->owner; \
71 pr_debug("Setup generic %s\n", __stringify(_name)); \
74 extern struct t10_alua_lu_gp
*default_lu_gp
;
76 static LIST_HEAD(g_tf_list
);
77 static DEFINE_MUTEX(g_tf_lock
);
79 static struct config_group target_core_hbagroup
;
80 static struct config_group alua_group
;
81 static struct config_group alua_lu_gps_group
;
83 static inline struct se_hba
*
84 item_to_hba(struct config_item
*item
)
86 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
90 * Attributes for /sys/kernel/config/target/
92 static ssize_t
target_core_item_version_show(struct config_item
*item
,
95 return sprintf(page
, "Target Engine Core ConfigFS Infrastructure %s"
96 " on %s/%s on "UTS_RELEASE
"\n", TARGET_CORE_VERSION
,
97 utsname()->sysname
, utsname()->machine
);
100 CONFIGFS_ATTR_RO(target_core_item_
, version
);
102 char db_root
[DB_ROOT_LEN
] = DB_ROOT_DEFAULT
;
103 static char db_root_stage
[DB_ROOT_LEN
];
105 static ssize_t
target_core_item_dbroot_show(struct config_item
*item
,
108 return sprintf(page
, "%s\n", db_root
);
111 static ssize_t
target_core_item_dbroot_store(struct config_item
*item
,
112 const char *page
, size_t count
)
117 mutex_lock(&g_tf_lock
);
118 if (!list_empty(&g_tf_list
)) {
119 mutex_unlock(&g_tf_lock
);
120 pr_err("db_root: cannot be changed: target drivers registered");
124 if (count
> (DB_ROOT_LEN
- 1)) {
125 mutex_unlock(&g_tf_lock
);
126 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
127 (int)count
, DB_ROOT_LEN
- 1);
131 read_bytes
= snprintf(db_root_stage
, DB_ROOT_LEN
, "%s", page
);
133 mutex_unlock(&g_tf_lock
);
136 if (db_root_stage
[read_bytes
- 1] == '\n')
137 db_root_stage
[read_bytes
- 1] = '\0';
139 /* validate new db root before accepting it */
140 fp
= filp_open(db_root_stage
, O_RDONLY
, 0);
142 mutex_unlock(&g_tf_lock
);
143 pr_err("db_root: cannot open: %s\n", db_root_stage
);
146 if (!S_ISDIR(file_inode(fp
)->i_mode
)) {
147 filp_close(fp
, NULL
);
148 mutex_unlock(&g_tf_lock
);
149 pr_err("db_root: not a directory: %s\n", db_root_stage
);
152 filp_close(fp
, NULL
);
154 strncpy(db_root
, db_root_stage
, read_bytes
);
156 mutex_unlock(&g_tf_lock
);
161 CONFIGFS_ATTR(target_core_item_
, dbroot
);
163 static struct target_fabric_configfs
*target_core_get_fabric(
166 struct target_fabric_configfs
*tf
;
171 mutex_lock(&g_tf_lock
);
172 list_for_each_entry(tf
, &g_tf_list
, tf_list
) {
173 if (!strcmp(tf
->tf_ops
->name
, name
)) {
174 atomic_inc(&tf
->tf_access_cnt
);
175 mutex_unlock(&g_tf_lock
);
179 mutex_unlock(&g_tf_lock
);
185 * Called from struct target_core_group_ops->make_group()
187 static struct config_group
*target_core_register_fabric(
188 struct config_group
*group
,
191 struct target_fabric_configfs
*tf
;
194 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
195 " %s\n", group
, name
);
197 tf
= target_core_get_fabric(name
);
199 pr_debug("target_core_register_fabric() trying autoload for %s\n",
203 * Below are some hardcoded request_module() calls to automatically
204 * local fabric modules when the following is called:
206 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
208 * Note that this does not limit which TCM fabric module can be
209 * registered, but simply provids auto loading logic for modules with
210 * mkdir(2) system calls with known TCM fabric modules.
213 if (!strncmp(name
, "iscsi", 5)) {
215 * Automatically load the LIO Target fabric module when the
216 * following is called:
218 * mkdir -p $CONFIGFS/target/iscsi
220 ret
= request_module("iscsi_target_mod");
222 pr_debug("request_module() failed for"
223 " iscsi_target_mod.ko: %d\n", ret
);
224 return ERR_PTR(-EINVAL
);
226 } else if (!strncmp(name
, "loopback", 8)) {
228 * Automatically load the tcm_loop fabric module when the
229 * following is called:
231 * mkdir -p $CONFIGFS/target/loopback
233 ret
= request_module("tcm_loop");
235 pr_debug("request_module() failed for"
236 " tcm_loop.ko: %d\n", ret
);
237 return ERR_PTR(-EINVAL
);
241 tf
= target_core_get_fabric(name
);
245 pr_debug("target_core_get_fabric() failed for %s\n",
247 return ERR_PTR(-EINVAL
);
249 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
250 " %s\n", tf
->tf_ops
->name
);
252 * On a successful target_core_get_fabric() look, the returned
253 * struct target_fabric_configfs *tf will contain a usage reference.
255 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
258 config_group_init_type_name(&tf
->tf_group
, name
, &tf
->tf_wwn_cit
);
260 config_group_init_type_name(&tf
->tf_disc_group
, "discovery_auth",
261 &tf
->tf_discovery_cit
);
262 configfs_add_default_group(&tf
->tf_disc_group
, &tf
->tf_group
);
264 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
265 " %s\n", tf
->tf_group
.cg_item
.ci_name
);
266 return &tf
->tf_group
;
270 * Called from struct target_core_group_ops->drop_item()
272 static void target_core_deregister_fabric(
273 struct config_group
*group
,
274 struct config_item
*item
)
276 struct target_fabric_configfs
*tf
= container_of(
277 to_config_group(item
), struct target_fabric_configfs
, tf_group
);
279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
280 " tf list\n", config_item_name(item
));
282 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
283 " %s\n", tf
->tf_ops
->name
);
284 atomic_dec(&tf
->tf_access_cnt
);
286 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
287 " %s\n", config_item_name(item
));
289 configfs_remove_default_groups(&tf
->tf_group
);
290 config_item_put(item
);
293 static struct configfs_group_operations target_core_fabric_group_ops
= {
294 .make_group
= &target_core_register_fabric
,
295 .drop_item
= &target_core_deregister_fabric
,
299 * All item attributes appearing in /sys/kernel/target/ appear here.
301 static struct configfs_attribute
*target_core_fabric_item_attrs
[] = {
302 &target_core_item_attr_version
,
303 &target_core_item_attr_dbroot
,
308 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
310 static struct config_item_type target_core_fabrics_item
= {
311 .ct_group_ops
= &target_core_fabric_group_ops
,
312 .ct_attrs
= target_core_fabric_item_attrs
,
313 .ct_owner
= THIS_MODULE
,
316 static struct configfs_subsystem target_core_fabrics
= {
319 .ci_namebuf
= "target",
320 .ci_type
= &target_core_fabrics_item
,
325 int target_depend_item(struct config_item
*item
)
327 return configfs_depend_item(&target_core_fabrics
, item
);
329 EXPORT_SYMBOL(target_depend_item
);
331 void target_undepend_item(struct config_item
*item
)
333 return configfs_undepend_item(item
);
335 EXPORT_SYMBOL(target_undepend_item
);
337 /*##############################################################################
338 // Start functions called by external Target Fabrics Modules
339 //############################################################################*/
341 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops
*tfo
)
344 pr_err("Missing tfo->name\n");
347 if (strlen(tfo
->name
) >= TARGET_FABRIC_NAME_SIZE
) {
348 pr_err("Passed name: %s exceeds TARGET_FABRIC"
349 "_NAME_SIZE\n", tfo
->name
);
352 if (!tfo
->get_fabric_name
) {
353 pr_err("Missing tfo->get_fabric_name()\n");
356 if (!tfo
->tpg_get_wwn
) {
357 pr_err("Missing tfo->tpg_get_wwn()\n");
360 if (!tfo
->tpg_get_tag
) {
361 pr_err("Missing tfo->tpg_get_tag()\n");
364 if (!tfo
->tpg_check_demo_mode
) {
365 pr_err("Missing tfo->tpg_check_demo_mode()\n");
368 if (!tfo
->tpg_check_demo_mode_cache
) {
369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
372 if (!tfo
->tpg_check_demo_mode_write_protect
) {
373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
376 if (!tfo
->tpg_check_prod_mode_write_protect
) {
377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
380 if (!tfo
->tpg_get_inst_index
) {
381 pr_err("Missing tfo->tpg_get_inst_index()\n");
384 if (!tfo
->release_cmd
) {
385 pr_err("Missing tfo->release_cmd()\n");
388 if (!tfo
->sess_get_index
) {
389 pr_err("Missing tfo->sess_get_index()\n");
392 if (!tfo
->write_pending
) {
393 pr_err("Missing tfo->write_pending()\n");
396 if (!tfo
->write_pending_status
) {
397 pr_err("Missing tfo->write_pending_status()\n");
400 if (!tfo
->set_default_node_attributes
) {
401 pr_err("Missing tfo->set_default_node_attributes()\n");
404 if (!tfo
->get_cmd_state
) {
405 pr_err("Missing tfo->get_cmd_state()\n");
408 if (!tfo
->queue_data_in
) {
409 pr_err("Missing tfo->queue_data_in()\n");
412 if (!tfo
->queue_status
) {
413 pr_err("Missing tfo->queue_status()\n");
416 if (!tfo
->queue_tm_rsp
) {
417 pr_err("Missing tfo->queue_tm_rsp()\n");
420 if (!tfo
->aborted_task
) {
421 pr_err("Missing tfo->aborted_task()\n");
425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
427 * target_core_fabric_configfs.c WWN+TPG group context code.
429 if (!tfo
->fabric_make_wwn
) {
430 pr_err("Missing tfo->fabric_make_wwn()\n");
433 if (!tfo
->fabric_drop_wwn
) {
434 pr_err("Missing tfo->fabric_drop_wwn()\n");
437 if (!tfo
->fabric_make_tpg
) {
438 pr_err("Missing tfo->fabric_make_tpg()\n");
441 if (!tfo
->fabric_drop_tpg
) {
442 pr_err("Missing tfo->fabric_drop_tpg()\n");
449 int target_register_template(const struct target_core_fabric_ops
*fo
)
451 struct target_fabric_configfs
*tf
;
454 ret
= target_fabric_tf_ops_check(fo
);
458 tf
= kzalloc(sizeof(struct target_fabric_configfs
), GFP_KERNEL
);
460 pr_err("%s: could not allocate memory!\n", __func__
);
464 INIT_LIST_HEAD(&tf
->tf_list
);
465 atomic_set(&tf
->tf_access_cnt
, 0);
467 target_fabric_setup_cits(tf
);
469 mutex_lock(&g_tf_lock
);
470 list_add_tail(&tf
->tf_list
, &g_tf_list
);
471 mutex_unlock(&g_tf_lock
);
475 EXPORT_SYMBOL(target_register_template
);
477 void target_unregister_template(const struct target_core_fabric_ops
*fo
)
479 struct target_fabric_configfs
*t
;
481 mutex_lock(&g_tf_lock
);
482 list_for_each_entry(t
, &g_tf_list
, tf_list
) {
483 if (!strcmp(t
->tf_ops
->name
, fo
->name
)) {
484 BUG_ON(atomic_read(&t
->tf_access_cnt
));
485 list_del(&t
->tf_list
);
486 mutex_unlock(&g_tf_lock
);
488 * Wait for any outstanding fabric se_deve_entry->rcu_head
489 * callbacks to complete post kfree_rcu(), before allowing
490 * fabric driver unload of TFO->module to proceed.
497 mutex_unlock(&g_tf_lock
);
499 EXPORT_SYMBOL(target_unregister_template
);
501 /*##############################################################################
502 // Stop functions called by external Target Fabrics Modules
503 //############################################################################*/
505 static inline struct se_dev_attrib
*to_attrib(struct config_item
*item
)
507 return container_of(to_config_group(item
), struct se_dev_attrib
,
511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
513 static ssize_t _name##_show(struct config_item *item, char *page) \
515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias
);
519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo
);
520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write
);
521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read
);
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache
);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl
);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas
);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu
);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws
);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw
);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc
);
529 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type
);
530 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type
);
531 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format
);
532 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids
);
533 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot
);
534 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord
);
535 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl
);
536 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size
);
537 DEF_CONFIGFS_ATTRIB_SHOW(block_size
);
538 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors
);
539 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors
);
540 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth
);
541 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth
);
542 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count
);
543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count
);
544 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity
);
545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment
);
546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data
);
547 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len
);
549 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
550 static ssize_t _name##_store(struct config_item *item, const char *page,\
553 struct se_dev_attrib *da = to_attrib(item); \
557 ret = kstrtou32(page, 0, &val); \
564 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count
);
565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count
);
566 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity
);
567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment
);
568 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len
);
570 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
571 static ssize_t _name##_store(struct config_item *item, const char *page, \
574 struct se_dev_attrib *da = to_attrib(item); \
578 ret = strtobool(page, &flag); \
585 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write
);
586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw
);
587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc
);
588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids
);
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot
);
591 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
592 static ssize_t _name##_store(struct config_item *item, const char *page,\
595 printk_once(KERN_WARNING \
596 "ignoring deprecated %s attribute\n", \
597 __stringify(_name)); \
601 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo
);
602 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read
);
604 static void dev_set_t10_wwn_model_alias(struct se_device
*dev
)
606 const char *configname
;
608 configname
= config_item_name(&dev
->dev_group
.cg_item
);
609 if (strlen(configname
) >= 16) {
610 pr_warn("dev[%p]: Backstore name '%s' is too long for "
611 "INQUIRY_MODEL, truncating to 16 bytes\n", dev
,
614 snprintf(&dev
->t10_wwn
.model
[0], 16, "%s", configname
);
617 static ssize_t
emulate_model_alias_store(struct config_item
*item
,
618 const char *page
, size_t count
)
620 struct se_dev_attrib
*da
= to_attrib(item
);
621 struct se_device
*dev
= da
->da_dev
;
625 if (dev
->export_count
) {
626 pr_err("dev[%p]: Unable to change model alias"
627 " while export_count is %d\n",
628 dev
, dev
->export_count
);
632 ret
= strtobool(page
, &flag
);
637 dev_set_t10_wwn_model_alias(dev
);
639 strncpy(&dev
->t10_wwn
.model
[0],
640 dev
->transport
->inquiry_prod
, 16);
642 da
->emulate_model_alias
= flag
;
646 static ssize_t
emulate_write_cache_store(struct config_item
*item
,
647 const char *page
, size_t count
)
649 struct se_dev_attrib
*da
= to_attrib(item
);
653 ret
= strtobool(page
, &flag
);
657 if (flag
&& da
->da_dev
->transport
->get_write_cache
) {
658 pr_err("emulate_write_cache not supported for this device\n");
662 da
->emulate_write_cache
= flag
;
663 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
668 static ssize_t
emulate_ua_intlck_ctrl_store(struct config_item
*item
,
669 const char *page
, size_t count
)
671 struct se_dev_attrib
*da
= to_attrib(item
);
675 ret
= kstrtou32(page
, 0, &val
);
679 if (val
!= 0 && val
!= 1 && val
!= 2) {
680 pr_err("Illegal value %d\n", val
);
684 if (da
->da_dev
->export_count
) {
685 pr_err("dev[%p]: Unable to change SE Device"
686 " UA_INTRLCK_CTRL while export_count is %d\n",
687 da
->da_dev
, da
->da_dev
->export_count
);
690 da
->emulate_ua_intlck_ctrl
= val
;
691 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
696 static ssize_t
emulate_tas_store(struct config_item
*item
,
697 const char *page
, size_t count
)
699 struct se_dev_attrib
*da
= to_attrib(item
);
703 ret
= strtobool(page
, &flag
);
707 if (da
->da_dev
->export_count
) {
708 pr_err("dev[%p]: Unable to change SE Device TAS while"
709 " export_count is %d\n",
710 da
->da_dev
, da
->da_dev
->export_count
);
713 da
->emulate_tas
= flag
;
714 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
715 da
->da_dev
, flag
? "Enabled" : "Disabled");
720 static ssize_t
emulate_tpu_store(struct config_item
*item
,
721 const char *page
, size_t count
)
723 struct se_dev_attrib
*da
= to_attrib(item
);
727 ret
= strtobool(page
, &flag
);
732 * We expect this value to be non-zero when generic Block Layer
733 * Discard supported is detected iblock_create_virtdevice().
735 if (flag
&& !da
->max_unmap_block_desc_count
) {
736 pr_err("Generic Block Discard not supported\n");
740 da
->emulate_tpu
= flag
;
741 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
746 static ssize_t
emulate_tpws_store(struct config_item
*item
,
747 const char *page
, size_t count
)
749 struct se_dev_attrib
*da
= to_attrib(item
);
753 ret
= strtobool(page
, &flag
);
758 * We expect this value to be non-zero when generic Block Layer
759 * Discard supported is detected iblock_create_virtdevice().
761 if (flag
&& !da
->max_unmap_block_desc_count
) {
762 pr_err("Generic Block Discard not supported\n");
766 da
->emulate_tpws
= flag
;
767 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
772 static ssize_t
pi_prot_type_store(struct config_item
*item
,
773 const char *page
, size_t count
)
775 struct se_dev_attrib
*da
= to_attrib(item
);
776 int old_prot
= da
->pi_prot_type
, ret
;
777 struct se_device
*dev
= da
->da_dev
;
780 ret
= kstrtou32(page
, 0, &flag
);
784 if (flag
!= 0 && flag
!= 1 && flag
!= 2 && flag
!= 3) {
785 pr_err("Illegal value %d for pi_prot_type\n", flag
);
789 pr_err("DIF TYPE2 protection currently not supported\n");
792 if (da
->hw_pi_prot_type
) {
793 pr_warn("DIF protection enabled on underlying hardware,"
797 if (!dev
->transport
->init_prot
|| !dev
->transport
->free_prot
) {
798 /* 0 is only allowed value for non-supporting backends */
802 pr_err("DIF protection not supported by backend: %s\n",
803 dev
->transport
->name
);
806 if (!(dev
->dev_flags
& DF_CONFIGURED
)) {
807 pr_err("DIF protection requires device to be configured\n");
810 if (dev
->export_count
) {
811 pr_err("dev[%p]: Unable to change SE Device PROT type while"
812 " export_count is %d\n", dev
, dev
->export_count
);
816 da
->pi_prot_type
= flag
;
818 if (flag
&& !old_prot
) {
819 ret
= dev
->transport
->init_prot(dev
);
821 da
->pi_prot_type
= old_prot
;
825 } else if (!flag
&& old_prot
) {
826 dev
->transport
->free_prot(dev
);
829 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev
, flag
);
833 static ssize_t
pi_prot_format_store(struct config_item
*item
,
834 const char *page
, size_t count
)
836 struct se_dev_attrib
*da
= to_attrib(item
);
837 struct se_device
*dev
= da
->da_dev
;
841 ret
= strtobool(page
, &flag
);
848 if (!dev
->transport
->format_prot
) {
849 pr_err("DIF protection format not supported by backend %s\n",
850 dev
->transport
->name
);
853 if (!(dev
->dev_flags
& DF_CONFIGURED
)) {
854 pr_err("DIF protection format requires device to be configured\n");
857 if (dev
->export_count
) {
858 pr_err("dev[%p]: Unable to format SE Device PROT type while"
859 " export_count is %d\n", dev
, dev
->export_count
);
863 ret
= dev
->transport
->format_prot(dev
);
867 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev
);
871 static ssize_t
force_pr_aptpl_store(struct config_item
*item
,
872 const char *page
, size_t count
)
874 struct se_dev_attrib
*da
= to_attrib(item
);
878 ret
= strtobool(page
, &flag
);
881 if (da
->da_dev
->export_count
) {
882 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
883 " export_count is %d\n",
884 da
->da_dev
, da
->da_dev
->export_count
);
888 da
->force_pr_aptpl
= flag
;
889 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da
->da_dev
, flag
);
893 static ssize_t
emulate_rest_reord_store(struct config_item
*item
,
894 const char *page
, size_t count
)
896 struct se_dev_attrib
*da
= to_attrib(item
);
900 ret
= strtobool(page
, &flag
);
905 printk(KERN_ERR
"dev[%p]: SE Device emulation of restricted"
906 " reordering not implemented\n", da
->da_dev
);
909 da
->emulate_rest_reord
= flag
;
910 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
915 static ssize_t
unmap_zeroes_data_store(struct config_item
*item
,
916 const char *page
, size_t count
)
918 struct se_dev_attrib
*da
= to_attrib(item
);
922 ret
= strtobool(page
, &flag
);
926 if (da
->da_dev
->export_count
) {
927 pr_err("dev[%p]: Unable to change SE Device"
928 " unmap_zeroes_data while export_count is %d\n",
929 da
->da_dev
, da
->da_dev
->export_count
);
933 * We expect this value to be non-zero when generic Block Layer
934 * Discard supported is detected iblock_configure_device().
936 if (flag
&& !da
->max_unmap_block_desc_count
) {
937 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
938 " because max_unmap_block_desc_count is zero\n",
942 da
->unmap_zeroes_data
= flag
;
943 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
949 * Note, this can only be called on unexported SE Device Object.
951 static ssize_t
queue_depth_store(struct config_item
*item
,
952 const char *page
, size_t count
)
954 struct se_dev_attrib
*da
= to_attrib(item
);
955 struct se_device
*dev
= da
->da_dev
;
959 ret
= kstrtou32(page
, 0, &val
);
963 if (dev
->export_count
) {
964 pr_err("dev[%p]: Unable to change SE Device TCQ while"
965 " export_count is %d\n",
966 dev
, dev
->export_count
);
970 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev
);
974 if (val
> dev
->dev_attrib
.queue_depth
) {
975 if (val
> dev
->dev_attrib
.hw_queue_depth
) {
976 pr_err("dev[%p]: Passed queue_depth:"
977 " %u exceeds TCM/SE_Device MAX"
978 " TCQ: %u\n", dev
, val
,
979 dev
->dev_attrib
.hw_queue_depth
);
983 da
->queue_depth
= dev
->queue_depth
= val
;
984 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev
, val
);
988 static ssize_t
optimal_sectors_store(struct config_item
*item
,
989 const char *page
, size_t count
)
991 struct se_dev_attrib
*da
= to_attrib(item
);
995 ret
= kstrtou32(page
, 0, &val
);
999 if (da
->da_dev
->export_count
) {
1000 pr_err("dev[%p]: Unable to change SE Device"
1001 " optimal_sectors while export_count is %d\n",
1002 da
->da_dev
, da
->da_dev
->export_count
);
1005 if (val
> da
->hw_max_sectors
) {
1006 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1007 " greater than hw_max_sectors: %u\n",
1008 da
->da_dev
, val
, da
->hw_max_sectors
);
1012 da
->optimal_sectors
= val
;
1013 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1018 static ssize_t
block_size_store(struct config_item
*item
,
1019 const char *page
, size_t count
)
1021 struct se_dev_attrib
*da
= to_attrib(item
);
1025 ret
= kstrtou32(page
, 0, &val
);
1029 if (da
->da_dev
->export_count
) {
1030 pr_err("dev[%p]: Unable to change SE Device block_size"
1031 " while export_count is %d\n",
1032 da
->da_dev
, da
->da_dev
->export_count
);
1036 if (val
!= 512 && val
!= 1024 && val
!= 2048 && val
!= 4096) {
1037 pr_err("dev[%p]: Illegal value for block_device: %u"
1038 " for SE device, must be 512, 1024, 2048 or 4096\n",
1043 da
->block_size
= val
;
1044 if (da
->max_bytes_per_io
)
1045 da
->hw_max_sectors
= da
->max_bytes_per_io
/ val
;
1047 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1052 CONFIGFS_ATTR(, emulate_model_alias
);
1053 CONFIGFS_ATTR(, emulate_dpo
);
1054 CONFIGFS_ATTR(, emulate_fua_write
);
1055 CONFIGFS_ATTR(, emulate_fua_read
);
1056 CONFIGFS_ATTR(, emulate_write_cache
);
1057 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl
);
1058 CONFIGFS_ATTR(, emulate_tas
);
1059 CONFIGFS_ATTR(, emulate_tpu
);
1060 CONFIGFS_ATTR(, emulate_tpws
);
1061 CONFIGFS_ATTR(, emulate_caw
);
1062 CONFIGFS_ATTR(, emulate_3pc
);
1063 CONFIGFS_ATTR(, pi_prot_type
);
1064 CONFIGFS_ATTR_RO(, hw_pi_prot_type
);
1065 CONFIGFS_ATTR(, pi_prot_format
);
1066 CONFIGFS_ATTR(, enforce_pr_isids
);
1067 CONFIGFS_ATTR(, is_nonrot
);
1068 CONFIGFS_ATTR(, emulate_rest_reord
);
1069 CONFIGFS_ATTR(, force_pr_aptpl
);
1070 CONFIGFS_ATTR_RO(, hw_block_size
);
1071 CONFIGFS_ATTR(, block_size
);
1072 CONFIGFS_ATTR_RO(, hw_max_sectors
);
1073 CONFIGFS_ATTR(, optimal_sectors
);
1074 CONFIGFS_ATTR_RO(, hw_queue_depth
);
1075 CONFIGFS_ATTR(, queue_depth
);
1076 CONFIGFS_ATTR(, max_unmap_lba_count
);
1077 CONFIGFS_ATTR(, max_unmap_block_desc_count
);
1078 CONFIGFS_ATTR(, unmap_granularity
);
1079 CONFIGFS_ATTR(, unmap_granularity_alignment
);
1080 CONFIGFS_ATTR(, unmap_zeroes_data
);
1081 CONFIGFS_ATTR(, max_write_same_len
);
1084 * dev_attrib attributes for devices using the target core SBC/SPC
1085 * interpreter. Any backend using spc_parse_cdb should be using
1088 struct configfs_attribute
*sbc_attrib_attrs
[] = {
1089 &attr_emulate_model_alias
,
1091 &attr_emulate_fua_write
,
1092 &attr_emulate_fua_read
,
1093 &attr_emulate_write_cache
,
1094 &attr_emulate_ua_intlck_ctrl
,
1101 &attr_hw_pi_prot_type
,
1102 &attr_pi_prot_format
,
1103 &attr_enforce_pr_isids
,
1105 &attr_emulate_rest_reord
,
1106 &attr_force_pr_aptpl
,
1107 &attr_hw_block_size
,
1109 &attr_hw_max_sectors
,
1110 &attr_optimal_sectors
,
1111 &attr_hw_queue_depth
,
1113 &attr_max_unmap_lba_count
,
1114 &attr_max_unmap_block_desc_count
,
1115 &attr_unmap_granularity
,
1116 &attr_unmap_granularity_alignment
,
1117 &attr_unmap_zeroes_data
,
1118 &attr_max_write_same_len
,
1121 EXPORT_SYMBOL(sbc_attrib_attrs
);
1124 * Minimal dev_attrib attributes for devices passing through CDBs.
1125 * In this case we only provide a few read-only attributes for
1126 * backwards compatibility.
1128 struct configfs_attribute
*passthrough_attrib_attrs
[] = {
1129 &attr_hw_pi_prot_type
,
1130 &attr_hw_block_size
,
1131 &attr_hw_max_sectors
,
1132 &attr_hw_queue_depth
,
1135 EXPORT_SYMBOL(passthrough_attrib_attrs
);
1137 TB_CIT_SETUP_DRV(dev_attrib
, NULL
, NULL
);
1139 /* End functions for struct config_item_type tb_dev_attrib_cit */
1141 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1143 static struct t10_wwn
*to_t10_wwn(struct config_item
*item
)
1145 return container_of(to_config_group(item
), struct t10_wwn
, t10_wwn_group
);
1149 * VPD page 0x80 Unit serial
1151 static ssize_t
target_wwn_vpd_unit_serial_show(struct config_item
*item
,
1154 return sprintf(page
, "T10 VPD Unit Serial Number: %s\n",
1155 &to_t10_wwn(item
)->unit_serial
[0]);
1158 static ssize_t
target_wwn_vpd_unit_serial_store(struct config_item
*item
,
1159 const char *page
, size_t count
)
1161 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1162 struct se_device
*dev
= t10_wwn
->t10_dev
;
1163 unsigned char buf
[INQUIRY_VPD_SERIAL_LEN
];
1166 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1167 * from the struct scsi_device level firmware, do not allow
1168 * VPD Unit Serial to be emulated.
1170 * Note this struct scsi_device could also be emulating VPD
1171 * information from its drivers/scsi LLD. But for now we assume
1172 * it is doing 'the right thing' wrt a world wide unique
1173 * VPD Unit Serial Number that OS dependent multipath can depend on.
1175 if (dev
->dev_flags
& DF_FIRMWARE_VPD_UNIT_SERIAL
) {
1176 pr_err("Underlying SCSI device firmware provided VPD"
1177 " Unit Serial, ignoring request\n");
1181 if (strlen(page
) >= INQUIRY_VPD_SERIAL_LEN
) {
1182 pr_err("Emulated VPD Unit Serial exceeds"
1183 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN
);
1187 * Check to see if any active $FABRIC_MOD exports exist. If they
1188 * do exist, fail here as changing this information on the fly
1189 * (underneath the initiator side OS dependent multipath code)
1190 * could cause negative effects.
1192 if (dev
->export_count
) {
1193 pr_err("Unable to set VPD Unit Serial while"
1194 " active %d $FABRIC_MOD exports exist\n",
1200 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1202 * Also, strip any newline added from the userspace
1203 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1205 memset(buf
, 0, INQUIRY_VPD_SERIAL_LEN
);
1206 snprintf(buf
, INQUIRY_VPD_SERIAL_LEN
, "%s", page
);
1207 snprintf(dev
->t10_wwn
.unit_serial
, INQUIRY_VPD_SERIAL_LEN
,
1208 "%s", strstrip(buf
));
1209 dev
->dev_flags
|= DF_EMULATED_VPD_UNIT_SERIAL
;
1211 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1212 " %s\n", dev
->t10_wwn
.unit_serial
);
1218 * VPD page 0x83 Protocol Identifier
1220 static ssize_t
target_wwn_vpd_protocol_identifier_show(struct config_item
*item
,
1223 struct t10_wwn
*t10_wwn
= to_t10_wwn(item
);
1224 struct t10_vpd
*vpd
;
1225 unsigned char buf
[VPD_TMP_BUF_SIZE
];
1228 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
1230 spin_lock(&t10_wwn
->t10_vpd_lock
);
1231 list_for_each_entry(vpd
, &t10_wwn
->t10_vpd_list
, vpd_list
) {
1232 if (!vpd
->protocol_identifier_set
)
1235 transport_dump_vpd_proto_id(vpd
, buf
, VPD_TMP_BUF_SIZE
);
1237 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1240 len
+= sprintf(page
+len
, "%s", buf
);
1242 spin_unlock(&t10_wwn
->t10_vpd_lock
);
1248 * Generic wrapper for dumping VPD identifiers by association.
1250 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1251 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1254 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1255 struct t10_vpd *vpd; \
1256 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1259 spin_lock(&t10_wwn->t10_vpd_lock); \
1260 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1261 if (vpd->association != _assoc) \
1264 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1265 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1266 if (len + strlen(buf) >= PAGE_SIZE) \
1268 len += sprintf(page+len, "%s", buf); \
1270 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1271 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1272 if (len + strlen(buf) >= PAGE_SIZE) \
1274 len += sprintf(page+len, "%s", buf); \
1276 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1277 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1278 if (len + strlen(buf) >= PAGE_SIZE) \
1280 len += sprintf(page+len, "%s", buf); \
1282 spin_unlock(&t10_wwn->t10_vpd_lock); \
1287 /* VPD page 0x83 Association: Logical Unit */
1288 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit
, 0x00);
1289 /* VPD page 0x83 Association: Target Port */
1290 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port
, 0x10);
1291 /* VPD page 0x83 Association: SCSI Target Device */
1292 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device
, 0x20);
1294 CONFIGFS_ATTR(target_wwn_
, vpd_unit_serial
);
1295 CONFIGFS_ATTR_RO(target_wwn_
, vpd_protocol_identifier
);
1296 CONFIGFS_ATTR_RO(target_wwn_
, vpd_assoc_logical_unit
);
1297 CONFIGFS_ATTR_RO(target_wwn_
, vpd_assoc_target_port
);
1298 CONFIGFS_ATTR_RO(target_wwn_
, vpd_assoc_scsi_target_device
);
1300 static struct configfs_attribute
*target_core_dev_wwn_attrs
[] = {
1301 &target_wwn_attr_vpd_unit_serial
,
1302 &target_wwn_attr_vpd_protocol_identifier
,
1303 &target_wwn_attr_vpd_assoc_logical_unit
,
1304 &target_wwn_attr_vpd_assoc_target_port
,
1305 &target_wwn_attr_vpd_assoc_scsi_target_device
,
1309 TB_CIT_SETUP(dev_wwn
, NULL
, NULL
, target_core_dev_wwn_attrs
);
1311 /* End functions for struct config_item_type tb_dev_wwn_cit */
1313 /* Start functions for struct config_item_type tb_dev_pr_cit */
1315 static struct se_device
*pr_to_dev(struct config_item
*item
)
1317 return container_of(to_config_group(item
), struct se_device
,
1321 static ssize_t
target_core_dev_pr_show_spc3_res(struct se_device
*dev
,
1324 struct se_node_acl
*se_nacl
;
1325 struct t10_pr_registration
*pr_reg
;
1326 char i_buf
[PR_REG_ISID_ID_LEN
];
1328 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1330 pr_reg
= dev
->dev_pr_res_holder
;
1332 return sprintf(page
, "No SPC-3 Reservation holder\n");
1334 se_nacl
= pr_reg
->pr_reg_nacl
;
1335 core_pr_dump_initiator_port(pr_reg
, i_buf
, PR_REG_ISID_ID_LEN
);
1337 return sprintf(page
, "SPC-3 Reservation: %s Initiator: %s%s\n",
1338 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1339 se_nacl
->initiatorname
, i_buf
);
1342 static ssize_t
target_core_dev_pr_show_spc2_res(struct se_device
*dev
,
1345 struct se_node_acl
*se_nacl
;
1348 se_nacl
= dev
->dev_reserved_node_acl
;
1351 "SPC-2 Reservation: %s Initiator: %s\n",
1352 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1353 se_nacl
->initiatorname
);
1355 len
= sprintf(page
, "No SPC-2 Reservation holder\n");
1360 static ssize_t
target_pr_res_holder_show(struct config_item
*item
, char *page
)
1362 struct se_device
*dev
= pr_to_dev(item
);
1365 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1366 return sprintf(page
, "Passthrough\n");
1368 spin_lock(&dev
->dev_reservation_lock
);
1369 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1370 ret
= target_core_dev_pr_show_spc2_res(dev
, page
);
1372 ret
= target_core_dev_pr_show_spc3_res(dev
, page
);
1373 spin_unlock(&dev
->dev_reservation_lock
);
1377 static ssize_t
target_pr_res_pr_all_tgt_pts_show(struct config_item
*item
,
1380 struct se_device
*dev
= pr_to_dev(item
);
1383 spin_lock(&dev
->dev_reservation_lock
);
1384 if (!dev
->dev_pr_res_holder
) {
1385 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1386 } else if (dev
->dev_pr_res_holder
->pr_reg_all_tg_pt
) {
1387 len
= sprintf(page
, "SPC-3 Reservation: All Target"
1388 " Ports registration\n");
1390 len
= sprintf(page
, "SPC-3 Reservation: Single"
1391 " Target Port registration\n");
1394 spin_unlock(&dev
->dev_reservation_lock
);
1398 static ssize_t
target_pr_res_pr_generation_show(struct config_item
*item
,
1401 return sprintf(page
, "0x%08x\n", pr_to_dev(item
)->t10_pr
.pr_generation
);
1405 static ssize_t
target_pr_res_pr_holder_tg_port_show(struct config_item
*item
,
1408 struct se_device
*dev
= pr_to_dev(item
);
1409 struct se_node_acl
*se_nacl
;
1410 struct se_portal_group
*se_tpg
;
1411 struct t10_pr_registration
*pr_reg
;
1412 const struct target_core_fabric_ops
*tfo
;
1415 spin_lock(&dev
->dev_reservation_lock
);
1416 pr_reg
= dev
->dev_pr_res_holder
;
1418 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1422 se_nacl
= pr_reg
->pr_reg_nacl
;
1423 se_tpg
= se_nacl
->se_tpg
;
1424 tfo
= se_tpg
->se_tpg_tfo
;
1426 len
+= sprintf(page
+len
, "SPC-3 Reservation: %s"
1427 " Target Node Endpoint: %s\n", tfo
->get_fabric_name(),
1428 tfo
->tpg_get_wwn(se_tpg
));
1429 len
+= sprintf(page
+len
, "SPC-3 Reservation: Relative Port"
1430 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1431 " %s Logical Unit: %llu\n", pr_reg
->tg_pt_sep_rtpi
,
1432 tfo
->get_fabric_name(), tfo
->tpg_get_tag(se_tpg
),
1433 tfo
->get_fabric_name(), pr_reg
->pr_aptpl_target_lun
);
1436 spin_unlock(&dev
->dev_reservation_lock
);
1441 static ssize_t
target_pr_res_pr_registered_i_pts_show(struct config_item
*item
,
1444 struct se_device
*dev
= pr_to_dev(item
);
1445 const struct target_core_fabric_ops
*tfo
;
1446 struct t10_pr_registration
*pr_reg
;
1447 unsigned char buf
[384];
1448 char i_buf
[PR_REG_ISID_ID_LEN
];
1452 len
+= sprintf(page
+len
, "SPC-3 PR Registrations:\n");
1454 spin_lock(&dev
->t10_pr
.registration_lock
);
1455 list_for_each_entry(pr_reg
, &dev
->t10_pr
.registration_list
,
1458 memset(buf
, 0, 384);
1459 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1460 tfo
= pr_reg
->pr_reg_nacl
->se_tpg
->se_tpg_tfo
;
1461 core_pr_dump_initiator_port(pr_reg
, i_buf
,
1462 PR_REG_ISID_ID_LEN
);
1463 sprintf(buf
, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1464 tfo
->get_fabric_name(),
1465 pr_reg
->pr_reg_nacl
->initiatorname
, i_buf
, pr_reg
->pr_res_key
,
1466 pr_reg
->pr_res_generation
);
1468 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1471 len
+= sprintf(page
+len
, "%s", buf
);
1474 spin_unlock(&dev
->t10_pr
.registration_lock
);
1477 len
+= sprintf(page
+len
, "None\n");
1482 static ssize_t
target_pr_res_pr_type_show(struct config_item
*item
, char *page
)
1484 struct se_device
*dev
= pr_to_dev(item
);
1485 struct t10_pr_registration
*pr_reg
;
1488 spin_lock(&dev
->dev_reservation_lock
);
1489 pr_reg
= dev
->dev_pr_res_holder
;
1491 len
= sprintf(page
, "SPC-3 Reservation Type: %s\n",
1492 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
));
1494 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1497 spin_unlock(&dev
->dev_reservation_lock
);
1501 static ssize_t
target_pr_res_type_show(struct config_item
*item
, char *page
)
1503 struct se_device
*dev
= pr_to_dev(item
);
1505 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1506 return sprintf(page
, "SPC_PASSTHROUGH\n");
1507 else if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1508 return sprintf(page
, "SPC2_RESERVATIONS\n");
1510 return sprintf(page
, "SPC3_PERSISTENT_RESERVATIONS\n");
1513 static ssize_t
target_pr_res_aptpl_active_show(struct config_item
*item
,
1516 struct se_device
*dev
= pr_to_dev(item
);
1518 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1521 return sprintf(page
, "APTPL Bit Status: %s\n",
1522 (dev
->t10_pr
.pr_aptpl_active
) ? "Activated" : "Disabled");
1525 static ssize_t
target_pr_res_aptpl_metadata_show(struct config_item
*item
,
1528 struct se_device
*dev
= pr_to_dev(item
);
1530 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1533 return sprintf(page
, "Ready to process PR APTPL metadata..\n");
1537 Opt_initiator_fabric
, Opt_initiator_node
, Opt_initiator_sid
,
1538 Opt_sa_res_key
, Opt_res_holder
, Opt_res_type
, Opt_res_scope
,
1539 Opt_res_all_tg_pt
, Opt_mapped_lun
, Opt_target_fabric
,
1540 Opt_target_node
, Opt_tpgt
, Opt_port_rtpi
, Opt_target_lun
, Opt_err
1543 static match_table_t tokens
= {
1544 {Opt_initiator_fabric
, "initiator_fabric=%s"},
1545 {Opt_initiator_node
, "initiator_node=%s"},
1546 {Opt_initiator_sid
, "initiator_sid=%s"},
1547 {Opt_sa_res_key
, "sa_res_key=%s"},
1548 {Opt_res_holder
, "res_holder=%d"},
1549 {Opt_res_type
, "res_type=%d"},
1550 {Opt_res_scope
, "res_scope=%d"},
1551 {Opt_res_all_tg_pt
, "res_all_tg_pt=%d"},
1552 {Opt_mapped_lun
, "mapped_lun=%lld"},
1553 {Opt_target_fabric
, "target_fabric=%s"},
1554 {Opt_target_node
, "target_node=%s"},
1555 {Opt_tpgt
, "tpgt=%d"},
1556 {Opt_port_rtpi
, "port_rtpi=%d"},
1557 {Opt_target_lun
, "target_lun=%lld"},
1561 static ssize_t
target_pr_res_aptpl_metadata_store(struct config_item
*item
,
1562 const char *page
, size_t count
)
1564 struct se_device
*dev
= pr_to_dev(item
);
1565 unsigned char *i_fabric
= NULL
, *i_port
= NULL
, *isid
= NULL
;
1566 unsigned char *t_fabric
= NULL
, *t_port
= NULL
;
1567 char *orig
, *ptr
, *opts
;
1568 substring_t args
[MAX_OPT_ARGS
];
1569 unsigned long long tmp_ll
;
1571 u64 mapped_lun
= 0, target_lun
= 0;
1572 int ret
= -1, res_holder
= 0, all_tg_pt
= 0, arg
, token
;
1576 if (dev
->transport
->transport_flags
& TRANSPORT_FLAG_PASSTHROUGH
)
1578 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1581 if (dev
->export_count
) {
1582 pr_debug("Unable to process APTPL metadata while"
1583 " active fabric exports exist\n");
1587 opts
= kstrdup(page
, GFP_KERNEL
);
1592 while ((ptr
= strsep(&opts
, ",\n")) != NULL
) {
1596 token
= match_token(ptr
, tokens
, args
);
1598 case Opt_initiator_fabric
:
1599 i_fabric
= match_strdup(args
);
1605 case Opt_initiator_node
:
1606 i_port
= match_strdup(args
);
1611 if (strlen(i_port
) >= PR_APTPL_MAX_IPORT_LEN
) {
1612 pr_err("APTPL metadata initiator_node="
1613 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1614 PR_APTPL_MAX_IPORT_LEN
);
1619 case Opt_initiator_sid
:
1620 isid
= match_strdup(args
);
1625 if (strlen(isid
) >= PR_REG_ISID_LEN
) {
1626 pr_err("APTPL metadata initiator_isid"
1627 "= exceeds PR_REG_ISID_LEN: %d\n",
1633 case Opt_sa_res_key
:
1634 ret
= kstrtoull(args
->from
, 0, &tmp_ll
);
1636 pr_err("kstrtoull() failed for sa_res_key=\n");
1639 sa_res_key
= (u64
)tmp_ll
;
1642 * PR APTPL Metadata for Reservation
1644 case Opt_res_holder
:
1645 ret
= match_int(args
, &arg
);
1651 ret
= match_int(args
, &arg
);
1657 ret
= match_int(args
, &arg
);
1661 case Opt_res_all_tg_pt
:
1662 ret
= match_int(args
, &arg
);
1665 all_tg_pt
= (int)arg
;
1667 case Opt_mapped_lun
:
1668 ret
= match_int(args
, &arg
);
1671 mapped_lun
= (u64
)arg
;
1674 * PR APTPL Metadata for Target Port
1676 case Opt_target_fabric
:
1677 t_fabric
= match_strdup(args
);
1683 case Opt_target_node
:
1684 t_port
= match_strdup(args
);
1689 if (strlen(t_port
) >= PR_APTPL_MAX_TPORT_LEN
) {
1690 pr_err("APTPL metadata target_node="
1691 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1692 PR_APTPL_MAX_TPORT_LEN
);
1698 ret
= match_int(args
, &arg
);
1704 ret
= match_int(args
, &arg
);
1708 case Opt_target_lun
:
1709 ret
= match_int(args
, &arg
);
1712 target_lun
= (u64
)arg
;
1719 if (!i_port
|| !t_port
|| !sa_res_key
) {
1720 pr_err("Illegal parameters for APTPL registration\n");
1725 if (res_holder
&& !(type
)) {
1726 pr_err("Illegal PR type: 0x%02x for reservation"
1732 ret
= core_scsi3_alloc_aptpl_registration(&dev
->t10_pr
, sa_res_key
,
1733 i_port
, isid
, mapped_lun
, t_port
, tpgt
, target_lun
,
1734 res_holder
, all_tg_pt
, type
);
1742 return (ret
== 0) ? count
: ret
;
1746 CONFIGFS_ATTR_RO(target_pr_
, res_holder
);
1747 CONFIGFS_ATTR_RO(target_pr_
, res_pr_all_tgt_pts
);
1748 CONFIGFS_ATTR_RO(target_pr_
, res_pr_generation
);
1749 CONFIGFS_ATTR_RO(target_pr_
, res_pr_holder_tg_port
);
1750 CONFIGFS_ATTR_RO(target_pr_
, res_pr_registered_i_pts
);
1751 CONFIGFS_ATTR_RO(target_pr_
, res_pr_type
);
1752 CONFIGFS_ATTR_RO(target_pr_
, res_type
);
1753 CONFIGFS_ATTR_RO(target_pr_
, res_aptpl_active
);
1754 CONFIGFS_ATTR(target_pr_
, res_aptpl_metadata
);
1756 static struct configfs_attribute
*target_core_dev_pr_attrs
[] = {
1757 &target_pr_attr_res_holder
,
1758 &target_pr_attr_res_pr_all_tgt_pts
,
1759 &target_pr_attr_res_pr_generation
,
1760 &target_pr_attr_res_pr_holder_tg_port
,
1761 &target_pr_attr_res_pr_registered_i_pts
,
1762 &target_pr_attr_res_pr_type
,
1763 &target_pr_attr_res_type
,
1764 &target_pr_attr_res_aptpl_active
,
1765 &target_pr_attr_res_aptpl_metadata
,
1769 TB_CIT_SETUP(dev_pr
, NULL
, NULL
, target_core_dev_pr_attrs
);
1771 /* End functions for struct config_item_type tb_dev_pr_cit */
1773 /* Start functions for struct config_item_type tb_dev_cit */
1775 static inline struct se_device
*to_device(struct config_item
*item
)
1777 return container_of(to_config_group(item
), struct se_device
, dev_group
);
1780 static ssize_t
target_dev_info_show(struct config_item
*item
, char *page
)
1782 struct se_device
*dev
= to_device(item
);
1784 ssize_t read_bytes
= 0;
1786 transport_dump_dev_state(dev
, page
, &bl
);
1788 read_bytes
+= dev
->transport
->show_configfs_dev_params(dev
,
1793 static ssize_t
target_dev_control_store(struct config_item
*item
,
1794 const char *page
, size_t count
)
1796 struct se_device
*dev
= to_device(item
);
1798 return dev
->transport
->set_configfs_dev_params(dev
, page
, count
);
1801 static ssize_t
target_dev_alias_show(struct config_item
*item
, char *page
)
1803 struct se_device
*dev
= to_device(item
);
1805 if (!(dev
->dev_flags
& DF_USING_ALIAS
))
1808 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->dev_alias
);
1811 static ssize_t
target_dev_alias_store(struct config_item
*item
,
1812 const char *page
, size_t count
)
1814 struct se_device
*dev
= to_device(item
);
1815 struct se_hba
*hba
= dev
->se_hba
;
1818 if (count
> (SE_DEV_ALIAS_LEN
-1)) {
1819 pr_err("alias count: %d exceeds"
1820 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count
,
1821 SE_DEV_ALIAS_LEN
-1);
1825 read_bytes
= snprintf(&dev
->dev_alias
[0], SE_DEV_ALIAS_LEN
, "%s", page
);
1828 if (dev
->dev_alias
[read_bytes
- 1] == '\n')
1829 dev
->dev_alias
[read_bytes
- 1] = '\0';
1831 dev
->dev_flags
|= DF_USING_ALIAS
;
1833 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1834 config_item_name(&hba
->hba_group
.cg_item
),
1835 config_item_name(&dev
->dev_group
.cg_item
),
1841 static ssize_t
target_dev_udev_path_show(struct config_item
*item
, char *page
)
1843 struct se_device
*dev
= to_device(item
);
1845 if (!(dev
->dev_flags
& DF_USING_UDEV_PATH
))
1848 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->udev_path
);
1851 static ssize_t
target_dev_udev_path_store(struct config_item
*item
,
1852 const char *page
, size_t count
)
1854 struct se_device
*dev
= to_device(item
);
1855 struct se_hba
*hba
= dev
->se_hba
;
1858 if (count
> (SE_UDEV_PATH_LEN
-1)) {
1859 pr_err("udev_path count: %d exceeds"
1860 " SE_UDEV_PATH_LEN-1: %u\n", (int)count
,
1861 SE_UDEV_PATH_LEN
-1);
1865 read_bytes
= snprintf(&dev
->udev_path
[0], SE_UDEV_PATH_LEN
,
1869 if (dev
->udev_path
[read_bytes
- 1] == '\n')
1870 dev
->udev_path
[read_bytes
- 1] = '\0';
1872 dev
->dev_flags
|= DF_USING_UDEV_PATH
;
1874 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1875 config_item_name(&hba
->hba_group
.cg_item
),
1876 config_item_name(&dev
->dev_group
.cg_item
),
1882 static ssize_t
target_dev_enable_show(struct config_item
*item
, char *page
)
1884 struct se_device
*dev
= to_device(item
);
1886 return snprintf(page
, PAGE_SIZE
, "%d\n", !!(dev
->dev_flags
& DF_CONFIGURED
));
1889 static ssize_t
target_dev_enable_store(struct config_item
*item
,
1890 const char *page
, size_t count
)
1892 struct se_device
*dev
= to_device(item
);
1896 ptr
= strstr(page
, "1");
1898 pr_err("For dev_enable ops, only valid value"
1903 ret
= target_configure_device(dev
);
1909 static ssize_t
target_dev_alua_lu_gp_show(struct config_item
*item
, char *page
)
1911 struct se_device
*dev
= to_device(item
);
1912 struct config_item
*lu_ci
;
1913 struct t10_alua_lu_gp
*lu_gp
;
1914 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1917 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1921 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1922 lu_gp
= lu_gp_mem
->lu_gp
;
1924 lu_ci
= &lu_gp
->lu_gp_group
.cg_item
;
1925 len
+= sprintf(page
, "LU Group Alias: %s\nLU Group ID: %hu\n",
1926 config_item_name(lu_ci
), lu_gp
->lu_gp_id
);
1928 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1933 static ssize_t
target_dev_alua_lu_gp_store(struct config_item
*item
,
1934 const char *page
, size_t count
)
1936 struct se_device
*dev
= to_device(item
);
1937 struct se_hba
*hba
= dev
->se_hba
;
1938 struct t10_alua_lu_gp
*lu_gp
= NULL
, *lu_gp_new
= NULL
;
1939 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1940 unsigned char buf
[LU_GROUP_NAME_BUF
];
1943 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1947 if (count
> LU_GROUP_NAME_BUF
) {
1948 pr_err("ALUA LU Group Alias too large!\n");
1951 memset(buf
, 0, LU_GROUP_NAME_BUF
);
1952 memcpy(buf
, page
, count
);
1954 * Any ALUA logical unit alias besides "NULL" means we will be
1955 * making a new group association.
1957 if (strcmp(strstrip(buf
), "NULL")) {
1959 * core_alua_get_lu_gp_by_name() will increment reference to
1960 * struct t10_alua_lu_gp. This reference is released with
1961 * core_alua_get_lu_gp_by_name below().
1963 lu_gp_new
= core_alua_get_lu_gp_by_name(strstrip(buf
));
1968 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1969 lu_gp
= lu_gp_mem
->lu_gp
;
1972 * Clearing an existing lu_gp association, and replacing
1976 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1977 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1979 config_item_name(&hba
->hba_group
.cg_item
),
1980 config_item_name(&dev
->dev_group
.cg_item
),
1981 config_item_name(&lu_gp
->lu_gp_group
.cg_item
),
1984 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1985 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1990 * Removing existing association of lu_gp_mem with lu_gp
1992 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1996 * Associate lu_gp_mem with lu_gp_new.
1998 __core_alua_attach_lu_gp_mem(lu_gp_mem
, lu_gp_new
);
1999 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
2001 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2002 " core/alua/lu_gps/%s, ID: %hu\n",
2003 (move
) ? "Moving" : "Adding",
2004 config_item_name(&hba
->hba_group
.cg_item
),
2005 config_item_name(&dev
->dev_group
.cg_item
),
2006 config_item_name(&lu_gp_new
->lu_gp_group
.cg_item
),
2007 lu_gp_new
->lu_gp_id
);
2009 core_alua_put_lu_gp_from_name(lu_gp_new
);
2013 static ssize_t
target_dev_lba_map_show(struct config_item
*item
, char *page
)
2015 struct se_device
*dev
= to_device(item
);
2016 struct t10_alua_lba_map
*map
;
2017 struct t10_alua_lba_map_member
*mem
;
2022 spin_lock(&dev
->t10_alua
.lba_map_lock
);
2023 if (!list_empty(&dev
->t10_alua
.lba_map_list
))
2024 bl
+= sprintf(b
+ bl
, "%u %u\n",
2025 dev
->t10_alua
.lba_map_segment_size
,
2026 dev
->t10_alua
.lba_map_segment_multiplier
);
2027 list_for_each_entry(map
, &dev
->t10_alua
.lba_map_list
, lba_map_list
) {
2028 bl
+= sprintf(b
+ bl
, "%llu %llu",
2029 map
->lba_map_first_lba
, map
->lba_map_last_lba
);
2030 list_for_each_entry(mem
, &map
->lba_map_mem_list
,
2032 switch (mem
->lba_map_mem_alua_state
) {
2033 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
:
2036 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
:
2039 case ALUA_ACCESS_STATE_STANDBY
:
2042 case ALUA_ACCESS_STATE_UNAVAILABLE
:
2049 bl
+= sprintf(b
+ bl
, " %d:%c",
2050 mem
->lba_map_mem_alua_pg_id
, state
);
2052 bl
+= sprintf(b
+ bl
, "\n");
2054 spin_unlock(&dev
->t10_alua
.lba_map_lock
);
2058 static ssize_t
target_dev_lba_map_store(struct config_item
*item
,
2059 const char *page
, size_t count
)
2061 struct se_device
*dev
= to_device(item
);
2062 struct t10_alua_lba_map
*lba_map
= NULL
;
2063 struct list_head lba_list
;
2064 char *map_entries
, *orig
, *ptr
;
2066 int pg_num
= -1, pg
;
2067 int ret
= 0, num
= 0, pg_id
, alua_state
;
2068 unsigned long start_lba
= -1, end_lba
= -1;
2069 unsigned long segment_size
= -1, segment_mult
= -1;
2071 orig
= map_entries
= kstrdup(page
, GFP_KERNEL
);
2075 INIT_LIST_HEAD(&lba_list
);
2076 while ((ptr
= strsep(&map_entries
, "\n")) != NULL
) {
2081 if (sscanf(ptr
, "%lu %lu\n",
2082 &segment_size
, &segment_mult
) != 2) {
2083 pr_err("Invalid line %d\n", num
);
2090 if (sscanf(ptr
, "%lu %lu", &start_lba
, &end_lba
) != 2) {
2091 pr_err("Invalid line %d\n", num
);
2095 ptr
= strchr(ptr
, ' ');
2097 pr_err("Invalid line %d, missing end lba\n", num
);
2102 ptr
= strchr(ptr
, ' ');
2104 pr_err("Invalid line %d, missing state definitions\n",
2110 lba_map
= core_alua_allocate_lba_map(&lba_list
,
2111 start_lba
, end_lba
);
2112 if (IS_ERR(lba_map
)) {
2113 ret
= PTR_ERR(lba_map
);
2117 while (sscanf(ptr
, "%d:%c", &pg_id
, &state
) == 2) {
2120 alua_state
= ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
;
2123 alua_state
= ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
;
2126 alua_state
= ALUA_ACCESS_STATE_STANDBY
;
2129 alua_state
= ALUA_ACCESS_STATE_UNAVAILABLE
;
2132 pr_err("Invalid ALUA state '%c'\n", state
);
2137 ret
= core_alua_allocate_lba_map_mem(lba_map
,
2140 pr_err("Invalid target descriptor %d:%c "
2146 ptr
= strchr(ptr
, ' ');
2154 else if (pg
!= pg_num
) {
2155 pr_err("Only %d from %d port groups definitions "
2156 "at line %d\n", pg
, pg_num
, num
);
2164 core_alua_free_lba_map(&lba_list
);
2167 core_alua_set_lba_map(dev
, &lba_list
,
2168 segment_size
, segment_mult
);
2173 CONFIGFS_ATTR_RO(target_dev_
, info
);
2174 CONFIGFS_ATTR_WO(target_dev_
, control
);
2175 CONFIGFS_ATTR(target_dev_
, alias
);
2176 CONFIGFS_ATTR(target_dev_
, udev_path
);
2177 CONFIGFS_ATTR(target_dev_
, enable
);
2178 CONFIGFS_ATTR(target_dev_
, alua_lu_gp
);
2179 CONFIGFS_ATTR(target_dev_
, lba_map
);
2181 static struct configfs_attribute
*target_core_dev_attrs
[] = {
2182 &target_dev_attr_info
,
2183 &target_dev_attr_control
,
2184 &target_dev_attr_alias
,
2185 &target_dev_attr_udev_path
,
2186 &target_dev_attr_enable
,
2187 &target_dev_attr_alua_lu_gp
,
2188 &target_dev_attr_lba_map
,
2192 static void target_core_dev_release(struct config_item
*item
)
2194 struct config_group
*dev_cg
= to_config_group(item
);
2195 struct se_device
*dev
=
2196 container_of(dev_cg
, struct se_device
, dev_group
);
2198 target_free_device(dev
);
2201 static struct configfs_item_operations target_core_dev_item_ops
= {
2202 .release
= target_core_dev_release
,
2205 TB_CIT_SETUP(dev
, &target_core_dev_item_ops
, NULL
, target_core_dev_attrs
);
2207 /* End functions for struct config_item_type tb_dev_cit */
2209 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2211 static inline struct t10_alua_lu_gp
*to_lu_gp(struct config_item
*item
)
2213 return container_of(to_config_group(item
), struct t10_alua_lu_gp
,
2217 static ssize_t
target_lu_gp_lu_gp_id_show(struct config_item
*item
, char *page
)
2219 struct t10_alua_lu_gp
*lu_gp
= to_lu_gp(item
);
2221 if (!lu_gp
->lu_gp_valid_id
)
2223 return sprintf(page
, "%hu\n", lu_gp
->lu_gp_id
);
2226 static ssize_t
target_lu_gp_lu_gp_id_store(struct config_item
*item
,
2227 const char *page
, size_t count
)
2229 struct t10_alua_lu_gp
*lu_gp
= to_lu_gp(item
);
2230 struct config_group
*alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2231 unsigned long lu_gp_id
;
2234 ret
= kstrtoul(page
, 0, &lu_gp_id
);
2236 pr_err("kstrtoul() returned %d for"
2237 " lu_gp_id\n", ret
);
2240 if (lu_gp_id
> 0x0000ffff) {
2241 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2242 " 0x0000ffff\n", lu_gp_id
);
2246 ret
= core_alua_set_lu_gp_id(lu_gp
, (u16
)lu_gp_id
);
2250 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2251 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2252 config_item_name(&alua_lu_gp_cg
->cg_item
),
2258 static ssize_t
target_lu_gp_members_show(struct config_item
*item
, char *page
)
2260 struct t10_alua_lu_gp
*lu_gp
= to_lu_gp(item
);
2261 struct se_device
*dev
;
2263 struct t10_alua_lu_gp_member
*lu_gp_mem
;
2264 ssize_t len
= 0, cur_len
;
2265 unsigned char buf
[LU_GROUP_NAME_BUF
];
2267 memset(buf
, 0, LU_GROUP_NAME_BUF
);
2269 spin_lock(&lu_gp
->lu_gp_lock
);
2270 list_for_each_entry(lu_gp_mem
, &lu_gp
->lu_gp_mem_list
, lu_gp_mem_list
) {
2271 dev
= lu_gp_mem
->lu_gp_mem_dev
;
2274 cur_len
= snprintf(buf
, LU_GROUP_NAME_BUF
, "%s/%s\n",
2275 config_item_name(&hba
->hba_group
.cg_item
),
2276 config_item_name(&dev
->dev_group
.cg_item
));
2277 cur_len
++; /* Extra byte for NULL terminator */
2279 if ((cur_len
+ len
) > PAGE_SIZE
) {
2280 pr_warn("Ran out of lu_gp_show_attr"
2281 "_members buffer\n");
2284 memcpy(page
+len
, buf
, cur_len
);
2287 spin_unlock(&lu_gp
->lu_gp_lock
);
2292 CONFIGFS_ATTR(target_lu_gp_
, lu_gp_id
);
2293 CONFIGFS_ATTR_RO(target_lu_gp_
, members
);
2295 static struct configfs_attribute
*target_core_alua_lu_gp_attrs
[] = {
2296 &target_lu_gp_attr_lu_gp_id
,
2297 &target_lu_gp_attr_members
,
2301 static void target_core_alua_lu_gp_release(struct config_item
*item
)
2303 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2304 struct t10_alua_lu_gp
, lu_gp_group
);
2306 core_alua_free_lu_gp(lu_gp
);
2309 static struct configfs_item_operations target_core_alua_lu_gp_ops
= {
2310 .release
= target_core_alua_lu_gp_release
,
2313 static struct config_item_type target_core_alua_lu_gp_cit
= {
2314 .ct_item_ops
= &target_core_alua_lu_gp_ops
,
2315 .ct_attrs
= target_core_alua_lu_gp_attrs
,
2316 .ct_owner
= THIS_MODULE
,
2319 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2321 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2323 static struct config_group
*target_core_alua_create_lu_gp(
2324 struct config_group
*group
,
2327 struct t10_alua_lu_gp
*lu_gp
;
2328 struct config_group
*alua_lu_gp_cg
= NULL
;
2329 struct config_item
*alua_lu_gp_ci
= NULL
;
2331 lu_gp
= core_alua_allocate_lu_gp(name
, 0);
2335 alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2336 alua_lu_gp_ci
= &alua_lu_gp_cg
->cg_item
;
2338 config_group_init_type_name(alua_lu_gp_cg
, name
,
2339 &target_core_alua_lu_gp_cit
);
2341 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2342 " Group: core/alua/lu_gps/%s\n",
2343 config_item_name(alua_lu_gp_ci
));
2345 return alua_lu_gp_cg
;
2349 static void target_core_alua_drop_lu_gp(
2350 struct config_group
*group
,
2351 struct config_item
*item
)
2353 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2354 struct t10_alua_lu_gp
, lu_gp_group
);
2356 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2357 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2358 config_item_name(item
), lu_gp
->lu_gp_id
);
2360 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2361 * -> target_core_alua_lu_gp_release()
2363 config_item_put(item
);
2366 static struct configfs_group_operations target_core_alua_lu_gps_group_ops
= {
2367 .make_group
= &target_core_alua_create_lu_gp
,
2368 .drop_item
= &target_core_alua_drop_lu_gp
,
2371 static struct config_item_type target_core_alua_lu_gps_cit
= {
2372 .ct_item_ops
= NULL
,
2373 .ct_group_ops
= &target_core_alua_lu_gps_group_ops
,
2374 .ct_owner
= THIS_MODULE
,
2377 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2379 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2381 static inline struct t10_alua_tg_pt_gp
*to_tg_pt_gp(struct config_item
*item
)
2383 return container_of(to_config_group(item
), struct t10_alua_tg_pt_gp
,
2387 static ssize_t
target_tg_pt_gp_alua_access_state_show(struct config_item
*item
,
2390 return sprintf(page
, "%d\n",
2391 atomic_read(&to_tg_pt_gp(item
)->tg_pt_gp_alua_access_state
));
2394 static ssize_t
target_tg_pt_gp_alua_access_state_store(struct config_item
*item
,
2395 const char *page
, size_t count
)
2397 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2398 struct se_device
*dev
= tg_pt_gp
->tg_pt_gp_dev
;
2402 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2403 pr_err("Unable to do implicit ALUA on non valid"
2404 " tg_pt_gp ID: %hu\n", tg_pt_gp
->tg_pt_gp_valid_id
);
2407 if (!(dev
->dev_flags
& DF_CONFIGURED
)) {
2408 pr_err("Unable to set alua_access_state while device is"
2409 " not configured\n");
2413 ret
= kstrtoul(page
, 0, &tmp
);
2415 pr_err("Unable to extract new ALUA access state from"
2419 new_state
= (int)tmp
;
2421 if (!(tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_IMPLICIT_ALUA
)) {
2422 pr_err("Unable to process implicit configfs ALUA"
2423 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2426 if (tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_EXPLICIT_ALUA
&&
2427 new_state
== ALUA_ACCESS_STATE_LBA_DEPENDENT
) {
2428 /* LBA DEPENDENT is only allowed with implicit ALUA */
2429 pr_err("Unable to process implicit configfs ALUA transition"
2430 " while explicit ALUA management is enabled\n");
2434 ret
= core_alua_do_port_transition(tg_pt_gp
, dev
,
2435 NULL
, NULL
, new_state
, 0);
2436 return (!ret
) ? count
: -EINVAL
;
2439 static ssize_t
target_tg_pt_gp_alua_access_status_show(struct config_item
*item
,
2442 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2443 return sprintf(page
, "%s\n",
2444 core_alua_dump_status(tg_pt_gp
->tg_pt_gp_alua_access_status
));
2447 static ssize_t
target_tg_pt_gp_alua_access_status_store(
2448 struct config_item
*item
, const char *page
, size_t count
)
2450 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2452 int new_status
, ret
;
2454 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2455 pr_err("Unable to do set ALUA access status on non"
2456 " valid tg_pt_gp ID: %hu\n",
2457 tg_pt_gp
->tg_pt_gp_valid_id
);
2461 ret
= kstrtoul(page
, 0, &tmp
);
2463 pr_err("Unable to extract new ALUA access status"
2464 " from %s\n", page
);
2467 new_status
= (int)tmp
;
2469 if ((new_status
!= ALUA_STATUS_NONE
) &&
2470 (new_status
!= ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG
) &&
2471 (new_status
!= ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA
)) {
2472 pr_err("Illegal ALUA access status: 0x%02x\n",
2477 tg_pt_gp
->tg_pt_gp_alua_access_status
= new_status
;
2481 static ssize_t
target_tg_pt_gp_alua_access_type_show(struct config_item
*item
,
2484 return core_alua_show_access_type(to_tg_pt_gp(item
), page
);
2487 static ssize_t
target_tg_pt_gp_alua_access_type_store(struct config_item
*item
,
2488 const char *page
, size_t count
)
2490 return core_alua_store_access_type(to_tg_pt_gp(item
), page
, count
);
2493 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2494 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2495 struct config_item *item, char *p) \
2497 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2498 return sprintf(p, "%d\n", \
2499 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2502 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2503 struct config_item *item, const char *p, size_t c) \
2505 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2506 unsigned long tmp; \
2509 if (!t->tg_pt_gp_valid_id) { \
2510 pr_err("Unable to do set ##_name ALUA state on non" \
2511 " valid tg_pt_gp ID: %hu\n", \
2512 t->tg_pt_gp_valid_id); \
2516 ret = kstrtoul(p, 0, &tmp); \
2518 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2522 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2526 t->tg_pt_gp_alua_supported_states |= _bit; \
2528 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2533 ALUA_SUPPORTED_STATE_ATTR(transitioning
, ALUA_T_SUP
);
2534 ALUA_SUPPORTED_STATE_ATTR(offline
, ALUA_O_SUP
);
2535 ALUA_SUPPORTED_STATE_ATTR(lba_dependent
, ALUA_LBD_SUP
);
2536 ALUA_SUPPORTED_STATE_ATTR(unavailable
, ALUA_U_SUP
);
2537 ALUA_SUPPORTED_STATE_ATTR(standby
, ALUA_S_SUP
);
2538 ALUA_SUPPORTED_STATE_ATTR(active_optimized
, ALUA_AO_SUP
);
2539 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized
, ALUA_AN_SUP
);
2541 static ssize_t
target_tg_pt_gp_alua_write_metadata_show(
2542 struct config_item
*item
, char *page
)
2544 return sprintf(page
, "%d\n",
2545 to_tg_pt_gp(item
)->tg_pt_gp_write_metadata
);
2548 static ssize_t
target_tg_pt_gp_alua_write_metadata_store(
2549 struct config_item
*item
, const char *page
, size_t count
)
2551 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2555 ret
= kstrtoul(page
, 0, &tmp
);
2557 pr_err("Unable to extract alua_write_metadata\n");
2561 if ((tmp
!= 0) && (tmp
!= 1)) {
2562 pr_err("Illegal value for alua_write_metadata:"
2566 tg_pt_gp
->tg_pt_gp_write_metadata
= (int)tmp
;
2571 static ssize_t
target_tg_pt_gp_nonop_delay_msecs_show(struct config_item
*item
,
2574 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item
), page
);
2577 static ssize_t
target_tg_pt_gp_nonop_delay_msecs_store(struct config_item
*item
,
2578 const char *page
, size_t count
)
2580 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item
), page
,
2584 static ssize_t
target_tg_pt_gp_trans_delay_msecs_show(struct config_item
*item
,
2587 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item
), page
);
2590 static ssize_t
target_tg_pt_gp_trans_delay_msecs_store(struct config_item
*item
,
2591 const char *page
, size_t count
)
2593 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item
), page
,
2597 static ssize_t
target_tg_pt_gp_implicit_trans_secs_show(
2598 struct config_item
*item
, char *page
)
2600 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item
), page
);
2603 static ssize_t
target_tg_pt_gp_implicit_trans_secs_store(
2604 struct config_item
*item
, const char *page
, size_t count
)
2606 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item
), page
,
2610 static ssize_t
target_tg_pt_gp_preferred_show(struct config_item
*item
,
2613 return core_alua_show_preferred_bit(to_tg_pt_gp(item
), page
);
2616 static ssize_t
target_tg_pt_gp_preferred_store(struct config_item
*item
,
2617 const char *page
, size_t count
)
2619 return core_alua_store_preferred_bit(to_tg_pt_gp(item
), page
, count
);
2622 static ssize_t
target_tg_pt_gp_tg_pt_gp_id_show(struct config_item
*item
,
2625 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2627 if (!tg_pt_gp
->tg_pt_gp_valid_id
)
2629 return sprintf(page
, "%hu\n", tg_pt_gp
->tg_pt_gp_id
);
2632 static ssize_t
target_tg_pt_gp_tg_pt_gp_id_store(struct config_item
*item
,
2633 const char *page
, size_t count
)
2635 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2636 struct config_group
*alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2637 unsigned long tg_pt_gp_id
;
2640 ret
= kstrtoul(page
, 0, &tg_pt_gp_id
);
2642 pr_err("kstrtoul() returned %d for"
2643 " tg_pt_gp_id\n", ret
);
2646 if (tg_pt_gp_id
> 0x0000ffff) {
2647 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2648 " 0x0000ffff\n", tg_pt_gp_id
);
2652 ret
= core_alua_set_tg_pt_gp_id(tg_pt_gp
, (u16
)tg_pt_gp_id
);
2656 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2657 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2658 config_item_name(&alua_tg_pt_gp_cg
->cg_item
),
2659 tg_pt_gp
->tg_pt_gp_id
);
2664 static ssize_t
target_tg_pt_gp_members_show(struct config_item
*item
,
2667 struct t10_alua_tg_pt_gp
*tg_pt_gp
= to_tg_pt_gp(item
);
2669 ssize_t len
= 0, cur_len
;
2670 unsigned char buf
[TG_PT_GROUP_NAME_BUF
];
2672 memset(buf
, 0, TG_PT_GROUP_NAME_BUF
);
2674 spin_lock(&tg_pt_gp
->tg_pt_gp_lock
);
2675 list_for_each_entry(lun
, &tg_pt_gp
->tg_pt_gp_lun_list
,
2676 lun_tg_pt_gp_link
) {
2677 struct se_portal_group
*tpg
= lun
->lun_tpg
;
2679 cur_len
= snprintf(buf
, TG_PT_GROUP_NAME_BUF
, "%s/%s/tpgt_%hu"
2680 "/%s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
2681 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
),
2682 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
2683 config_item_name(&lun
->lun_group
.cg_item
));
2684 cur_len
++; /* Extra byte for NULL terminator */
2686 if ((cur_len
+ len
) > PAGE_SIZE
) {
2687 pr_warn("Ran out of lu_gp_show_attr"
2688 "_members buffer\n");
2691 memcpy(page
+len
, buf
, cur_len
);
2694 spin_unlock(&tg_pt_gp
->tg_pt_gp_lock
);
2699 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_access_state
);
2700 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_access_status
);
2701 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_access_type
);
2702 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_transitioning
);
2703 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_offline
);
2704 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_lba_dependent
);
2705 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_unavailable
);
2706 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_standby
);
2707 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_active_optimized
);
2708 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_support_active_nonoptimized
);
2709 CONFIGFS_ATTR(target_tg_pt_gp_
, alua_write_metadata
);
2710 CONFIGFS_ATTR(target_tg_pt_gp_
, nonop_delay_msecs
);
2711 CONFIGFS_ATTR(target_tg_pt_gp_
, trans_delay_msecs
);
2712 CONFIGFS_ATTR(target_tg_pt_gp_
, implicit_trans_secs
);
2713 CONFIGFS_ATTR(target_tg_pt_gp_
, preferred
);
2714 CONFIGFS_ATTR(target_tg_pt_gp_
, tg_pt_gp_id
);
2715 CONFIGFS_ATTR_RO(target_tg_pt_gp_
, members
);
2717 static struct configfs_attribute
*target_core_alua_tg_pt_gp_attrs
[] = {
2718 &target_tg_pt_gp_attr_alua_access_state
,
2719 &target_tg_pt_gp_attr_alua_access_status
,
2720 &target_tg_pt_gp_attr_alua_access_type
,
2721 &target_tg_pt_gp_attr_alua_support_transitioning
,
2722 &target_tg_pt_gp_attr_alua_support_offline
,
2723 &target_tg_pt_gp_attr_alua_support_lba_dependent
,
2724 &target_tg_pt_gp_attr_alua_support_unavailable
,
2725 &target_tg_pt_gp_attr_alua_support_standby
,
2726 &target_tg_pt_gp_attr_alua_support_active_nonoptimized
,
2727 &target_tg_pt_gp_attr_alua_support_active_optimized
,
2728 &target_tg_pt_gp_attr_alua_write_metadata
,
2729 &target_tg_pt_gp_attr_nonop_delay_msecs
,
2730 &target_tg_pt_gp_attr_trans_delay_msecs
,
2731 &target_tg_pt_gp_attr_implicit_trans_secs
,
2732 &target_tg_pt_gp_attr_preferred
,
2733 &target_tg_pt_gp_attr_tg_pt_gp_id
,
2734 &target_tg_pt_gp_attr_members
,
2738 static void target_core_alua_tg_pt_gp_release(struct config_item
*item
)
2740 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2741 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2743 core_alua_free_tg_pt_gp(tg_pt_gp
);
2746 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops
= {
2747 .release
= target_core_alua_tg_pt_gp_release
,
2750 static struct config_item_type target_core_alua_tg_pt_gp_cit
= {
2751 .ct_item_ops
= &target_core_alua_tg_pt_gp_ops
,
2752 .ct_attrs
= target_core_alua_tg_pt_gp_attrs
,
2753 .ct_owner
= THIS_MODULE
,
2756 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2758 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2760 static struct config_group
*target_core_alua_create_tg_pt_gp(
2761 struct config_group
*group
,
2764 struct t10_alua
*alua
= container_of(group
, struct t10_alua
,
2765 alua_tg_pt_gps_group
);
2766 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2767 struct config_group
*alua_tg_pt_gp_cg
= NULL
;
2768 struct config_item
*alua_tg_pt_gp_ci
= NULL
;
2770 tg_pt_gp
= core_alua_allocate_tg_pt_gp(alua
->t10_dev
, name
, 0);
2774 alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2775 alua_tg_pt_gp_ci
= &alua_tg_pt_gp_cg
->cg_item
;
2777 config_group_init_type_name(alua_tg_pt_gp_cg
, name
,
2778 &target_core_alua_tg_pt_gp_cit
);
2780 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2781 " Group: alua/tg_pt_gps/%s\n",
2782 config_item_name(alua_tg_pt_gp_ci
));
2784 return alua_tg_pt_gp_cg
;
2787 static void target_core_alua_drop_tg_pt_gp(
2788 struct config_group
*group
,
2789 struct config_item
*item
)
2791 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2792 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2794 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2795 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2796 config_item_name(item
), tg_pt_gp
->tg_pt_gp_id
);
2798 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2799 * -> target_core_alua_tg_pt_gp_release().
2801 config_item_put(item
);
2804 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops
= {
2805 .make_group
= &target_core_alua_create_tg_pt_gp
,
2806 .drop_item
= &target_core_alua_drop_tg_pt_gp
,
2809 TB_CIT_SETUP(dev_alua_tg_pt_gps
, NULL
, &target_core_alua_tg_pt_gps_group_ops
, NULL
);
2811 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2813 /* Start functions for struct config_item_type target_core_alua_cit */
2816 * target_core_alua_cit is a ConfigFS group that lives under
2817 * /sys/kernel/config/target/core/alua. There are default groups
2818 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2819 * target_core_alua_cit in target_core_init_configfs() below.
2821 static struct config_item_type target_core_alua_cit
= {
2822 .ct_item_ops
= NULL
,
2824 .ct_owner
= THIS_MODULE
,
2827 /* End functions for struct config_item_type target_core_alua_cit */
2829 /* Start functions for struct config_item_type tb_dev_stat_cit */
2831 static struct config_group
*target_core_stat_mkdir(
2832 struct config_group
*group
,
2835 return ERR_PTR(-ENOSYS
);
2838 static void target_core_stat_rmdir(
2839 struct config_group
*group
,
2840 struct config_item
*item
)
2845 static struct configfs_group_operations target_core_stat_group_ops
= {
2846 .make_group
= &target_core_stat_mkdir
,
2847 .drop_item
= &target_core_stat_rmdir
,
2850 TB_CIT_SETUP(dev_stat
, NULL
, &target_core_stat_group_ops
, NULL
);
2852 /* End functions for struct config_item_type tb_dev_stat_cit */
2854 /* Start functions for struct config_item_type target_core_hba_cit */
2856 static struct config_group
*target_core_make_subdev(
2857 struct config_group
*group
,
2860 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2861 struct config_item
*hba_ci
= &group
->cg_item
;
2862 struct se_hba
*hba
= item_to_hba(hba_ci
);
2863 struct target_backend
*tb
= hba
->backend
;
2864 struct se_device
*dev
;
2865 int errno
= -ENOMEM
, ret
;
2867 ret
= mutex_lock_interruptible(&hba
->hba_access_mutex
);
2869 return ERR_PTR(ret
);
2871 dev
= target_alloc_device(hba
, name
);
2875 config_group_init_type_name(&dev
->dev_group
, name
, &tb
->tb_dev_cit
);
2877 config_group_init_type_name(&dev
->dev_attrib
.da_group
, "attrib",
2878 &tb
->tb_dev_attrib_cit
);
2879 configfs_add_default_group(&dev
->dev_attrib
.da_group
, &dev
->dev_group
);
2881 config_group_init_type_name(&dev
->dev_pr_group
, "pr",
2882 &tb
->tb_dev_pr_cit
);
2883 configfs_add_default_group(&dev
->dev_pr_group
, &dev
->dev_group
);
2885 config_group_init_type_name(&dev
->t10_wwn
.t10_wwn_group
, "wwn",
2886 &tb
->tb_dev_wwn_cit
);
2887 configfs_add_default_group(&dev
->t10_wwn
.t10_wwn_group
,
2890 config_group_init_type_name(&dev
->t10_alua
.alua_tg_pt_gps_group
,
2891 "alua", &tb
->tb_dev_alua_tg_pt_gps_cit
);
2892 configfs_add_default_group(&dev
->t10_alua
.alua_tg_pt_gps_group
,
2895 config_group_init_type_name(&dev
->dev_stat_grps
.stat_group
,
2896 "statistics", &tb
->tb_dev_stat_cit
);
2897 configfs_add_default_group(&dev
->dev_stat_grps
.stat_group
,
2901 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2903 tg_pt_gp
= core_alua_allocate_tg_pt_gp(dev
, "default_tg_pt_gp", 1);
2905 goto out_free_device
;
2906 dev
->t10_alua
.default_tg_pt_gp
= tg_pt_gp
;
2908 config_group_init_type_name(&tg_pt_gp
->tg_pt_gp_group
,
2909 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit
);
2910 configfs_add_default_group(&tg_pt_gp
->tg_pt_gp_group
,
2911 &dev
->t10_alua
.alua_tg_pt_gps_group
);
2914 * Add core/$HBA/$DEV/statistics/ default groups
2916 target_stat_setup_dev_default_groups(dev
);
2918 mutex_unlock(&hba
->hba_access_mutex
);
2919 return &dev
->dev_group
;
2922 target_free_device(dev
);
2924 mutex_unlock(&hba
->hba_access_mutex
);
2925 return ERR_PTR(errno
);
2928 static void target_core_drop_subdev(
2929 struct config_group
*group
,
2930 struct config_item
*item
)
2932 struct config_group
*dev_cg
= to_config_group(item
);
2933 struct se_device
*dev
=
2934 container_of(dev_cg
, struct se_device
, dev_group
);
2937 hba
= item_to_hba(&dev
->se_hba
->hba_group
.cg_item
);
2939 mutex_lock(&hba
->hba_access_mutex
);
2941 configfs_remove_default_groups(&dev
->dev_stat_grps
.stat_group
);
2942 configfs_remove_default_groups(&dev
->t10_alua
.alua_tg_pt_gps_group
);
2945 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2946 * directly from target_core_alua_tg_pt_gp_release().
2948 dev
->t10_alua
.default_tg_pt_gp
= NULL
;
2950 configfs_remove_default_groups(dev_cg
);
2953 * se_dev is released from target_core_dev_item_ops->release()
2955 config_item_put(item
);
2956 mutex_unlock(&hba
->hba_access_mutex
);
2959 static struct configfs_group_operations target_core_hba_group_ops
= {
2960 .make_group
= target_core_make_subdev
,
2961 .drop_item
= target_core_drop_subdev
,
2965 static inline struct se_hba
*to_hba(struct config_item
*item
)
2967 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
2970 static ssize_t
target_hba_info_show(struct config_item
*item
, char *page
)
2972 struct se_hba
*hba
= to_hba(item
);
2974 return sprintf(page
, "HBA Index: %d plugin: %s version: %s\n",
2975 hba
->hba_id
, hba
->backend
->ops
->name
,
2976 TARGET_CORE_VERSION
);
2979 static ssize_t
target_hba_mode_show(struct config_item
*item
, char *page
)
2981 struct se_hba
*hba
= to_hba(item
);
2984 if (hba
->hba_flags
& HBA_FLAGS_PSCSI_MODE
)
2987 return sprintf(page
, "%d\n", hba_mode
);
2990 static ssize_t
target_hba_mode_store(struct config_item
*item
,
2991 const char *page
, size_t count
)
2993 struct se_hba
*hba
= to_hba(item
);
2994 unsigned long mode_flag
;
2997 if (hba
->backend
->ops
->pmode_enable_hba
== NULL
)
3000 ret
= kstrtoul(page
, 0, &mode_flag
);
3002 pr_err("Unable to extract hba mode flag: %d\n", ret
);
3006 if (hba
->dev_count
) {
3007 pr_err("Unable to set hba_mode with active devices\n");
3011 ret
= hba
->backend
->ops
->pmode_enable_hba(hba
, mode_flag
);
3015 hba
->hba_flags
|= HBA_FLAGS_PSCSI_MODE
;
3017 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
3022 CONFIGFS_ATTR_RO(target_
, hba_info
);
3023 CONFIGFS_ATTR(target_
, hba_mode
);
3025 static void target_core_hba_release(struct config_item
*item
)
3027 struct se_hba
*hba
= container_of(to_config_group(item
),
3028 struct se_hba
, hba_group
);
3029 core_delete_hba(hba
);
3032 static struct configfs_attribute
*target_core_hba_attrs
[] = {
3033 &target_attr_hba_info
,
3034 &target_attr_hba_mode
,
3038 static struct configfs_item_operations target_core_hba_item_ops
= {
3039 .release
= target_core_hba_release
,
3042 static struct config_item_type target_core_hba_cit
= {
3043 .ct_item_ops
= &target_core_hba_item_ops
,
3044 .ct_group_ops
= &target_core_hba_group_ops
,
3045 .ct_attrs
= target_core_hba_attrs
,
3046 .ct_owner
= THIS_MODULE
,
3049 static struct config_group
*target_core_call_addhbatotarget(
3050 struct config_group
*group
,
3053 char *se_plugin_str
, *str
, *str2
;
3055 char buf
[TARGET_CORE_NAME_MAX_LEN
];
3056 unsigned long plugin_dep_id
= 0;
3059 memset(buf
, 0, TARGET_CORE_NAME_MAX_LEN
);
3060 if (strlen(name
) >= TARGET_CORE_NAME_MAX_LEN
) {
3061 pr_err("Passed *name strlen(): %d exceeds"
3062 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name
),
3063 TARGET_CORE_NAME_MAX_LEN
);
3064 return ERR_PTR(-ENAMETOOLONG
);
3066 snprintf(buf
, TARGET_CORE_NAME_MAX_LEN
, "%s", name
);
3068 str
= strstr(buf
, "_");
3070 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3071 return ERR_PTR(-EINVAL
);
3073 se_plugin_str
= buf
;
3075 * Special case for subsystem plugins that have "_" in their names.
3076 * Namely rd_direct and rd_mcp..
3078 str2
= strstr(str
+1, "_");
3080 *str2
= '\0'; /* Terminate for *se_plugin_str */
3081 str2
++; /* Skip to start of plugin dependent ID */
3084 *str
= '\0'; /* Terminate for *se_plugin_str */
3085 str
++; /* Skip to start of plugin dependent ID */
3088 ret
= kstrtoul(str
, 0, &plugin_dep_id
);
3090 pr_err("kstrtoul() returned %d for"
3091 " plugin_dep_id\n", ret
);
3092 return ERR_PTR(ret
);
3095 * Load up TCM subsystem plugins if they have not already been loaded.
3097 transport_subsystem_check_init();
3099 hba
= core_alloc_hba(se_plugin_str
, plugin_dep_id
, 0);
3101 return ERR_CAST(hba
);
3103 config_group_init_type_name(&hba
->hba_group
, name
,
3104 &target_core_hba_cit
);
3106 return &hba
->hba_group
;
3109 static void target_core_call_delhbafromtarget(
3110 struct config_group
*group
,
3111 struct config_item
*item
)
3114 * core_delete_hba() is called from target_core_hba_item_ops->release()
3115 * -> target_core_hba_release()
3117 config_item_put(item
);
3120 static struct configfs_group_operations target_core_group_ops
= {
3121 .make_group
= target_core_call_addhbatotarget
,
3122 .drop_item
= target_core_call_delhbafromtarget
,
3125 static struct config_item_type target_core_cit
= {
3126 .ct_item_ops
= NULL
,
3127 .ct_group_ops
= &target_core_group_ops
,
3129 .ct_owner
= THIS_MODULE
,
3132 /* Stop functions for struct config_item_type target_core_hba_cit */
3134 void target_setup_backend_cits(struct target_backend
*tb
)
3136 target_core_setup_dev_cit(tb
);
3137 target_core_setup_dev_attrib_cit(tb
);
3138 target_core_setup_dev_pr_cit(tb
);
3139 target_core_setup_dev_wwn_cit(tb
);
3140 target_core_setup_dev_alua_tg_pt_gps_cit(tb
);
3141 target_core_setup_dev_stat_cit(tb
);
3144 static int __init
target_core_init_configfs(void)
3146 struct configfs_subsystem
*subsys
= &target_core_fabrics
;
3147 struct t10_alua_lu_gp
*lu_gp
;
3150 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3151 " Engine: %s on %s/%s on "UTS_RELEASE
"\n",
3152 TARGET_CORE_VERSION
, utsname()->sysname
, utsname()->machine
);
3154 config_group_init(&subsys
->su_group
);
3155 mutex_init(&subsys
->su_mutex
);
3157 ret
= init_se_kmem_caches();
3161 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3162 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3164 config_group_init_type_name(&target_core_hbagroup
, "core",
3166 configfs_add_default_group(&target_core_hbagroup
, &subsys
->su_group
);
3169 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3171 config_group_init_type_name(&alua_group
, "alua", &target_core_alua_cit
);
3172 configfs_add_default_group(&alua_group
, &target_core_hbagroup
);
3175 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3176 * groups under /sys/kernel/config/target/core/alua/
3178 config_group_init_type_name(&alua_lu_gps_group
, "lu_gps",
3179 &target_core_alua_lu_gps_cit
);
3180 configfs_add_default_group(&alua_lu_gps_group
, &alua_group
);
3183 * Add core/alua/lu_gps/default_lu_gp
3185 lu_gp
= core_alua_allocate_lu_gp("default_lu_gp", 1);
3186 if (IS_ERR(lu_gp
)) {
3191 config_group_init_type_name(&lu_gp
->lu_gp_group
, "default_lu_gp",
3192 &target_core_alua_lu_gp_cit
);
3193 configfs_add_default_group(&lu_gp
->lu_gp_group
, &alua_lu_gps_group
);
3195 default_lu_gp
= lu_gp
;
3198 * Register the target_core_mod subsystem with configfs.
3200 ret
= configfs_register_subsystem(subsys
);
3202 pr_err("Error %d while registering subsystem %s\n",
3203 ret
, subsys
->su_group
.cg_item
.ci_namebuf
);
3206 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3207 " Infrastructure: "TARGET_CORE_VERSION
" on %s/%s"
3208 " on "UTS_RELEASE
"\n", utsname()->sysname
, utsname()->machine
);
3210 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3212 ret
= rd_module_init();
3216 ret
= core_dev_setup_virtual_lun0();
3220 ret
= target_xcopy_setup_pt();
3227 configfs_unregister_subsystem(subsys
);
3228 core_dev_release_virtual_lun0();
3231 if (default_lu_gp
) {
3232 core_alua_free_lu_gp(default_lu_gp
);
3233 default_lu_gp
= NULL
;
3235 release_se_kmem_caches();
3239 static void __exit
target_core_exit_configfs(void)
3241 configfs_remove_default_groups(&alua_lu_gps_group
);
3242 configfs_remove_default_groups(&alua_group
);
3243 configfs_remove_default_groups(&target_core_hbagroup
);
3246 * We expect subsys->su_group.default_groups to be released
3247 * by configfs subsystem provider logic..
3249 configfs_unregister_subsystem(&target_core_fabrics
);
3251 core_alua_free_lu_gp(default_lu_gp
);
3252 default_lu_gp
= NULL
;
3254 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3255 " Infrastructure\n");
3257 core_dev_release_virtual_lun0();
3259 target_xcopy_release_pt();
3260 release_se_kmem_caches();
3263 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3264 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3265 MODULE_LICENSE("GPL");
3267 module_init(target_core_init_configfs
);
3268 module_exit(target_core_exit_configfs
);