1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*******************************************************************************
3 * Filename: target_core_configfs.c
5 * This file contains ConfigFS logic for the Generic Target Engine project.
7 * (c) Copyright 2008-2013 Datera, Inc.
9 * Nicholas A. Bellinger <nab@kernel.org>
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
13 ****************************************************************************/
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <generated/utsrelease.h>
18 #include <linux/utsname.h>
19 #include <linux/init.h>
21 #include <linux/namei.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/delay.h>
25 #include <linux/unistd.h>
26 #include <linux/string.h>
27 #include <linux/parser.h>
28 #include <linux/syscalls.h>
29 #include <linux/configfs.h>
30 #include <linux/spinlock.h>
32 #include <target/target_core_base.h>
33 #include <target/target_core_backend.h>
34 #include <target/target_core_fabric.h>
36 #include "target_core_internal.h"
37 #include "target_core_alua.h"
38 #include "target_core_pr.h"
39 #include "target_core_rd.h"
40 #include "target_core_xcopy.h"
42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
45 struct config_item_type *cit = &tb->tb_##_name##_cit; \
47 cit->ct_item_ops = _item_ops; \
48 cit->ct_group_ops = _group_ops; \
49 cit->ct_attrs = _attrs; \
50 cit->ct_owner = tb->ops->owner; \
51 pr_debug("Setup generic %s\n", __stringify(_name)); \
54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
57 struct config_item_type *cit = &tb->tb_##_name##_cit; \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
62 cit->ct_owner = tb->ops->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
66 extern struct t10_alua_lu_gp *default_lu_gp;
68 static LIST_HEAD(g_tf_list);
69 static DEFINE_MUTEX(g_tf_lock);
71 static struct config_group target_core_hbagroup;
72 static struct config_group alua_group;
73 static struct config_group alua_lu_gps_group;
75 static unsigned int target_devices;
76 static DEFINE_MUTEX(target_devices_lock);
78 static inline struct se_hba *
79 item_to_hba(struct config_item *item)
81 return container_of(to_config_group(item), struct se_hba, hba_group);
85 * Attributes for /sys/kernel/config/target/
87 static ssize_t target_core_item_version_show(struct config_item *item,
90 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
91 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
92 utsname()->sysname, utsname()->machine);
95 CONFIGFS_ATTR_RO(target_core_item_, version);
97 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
98 static char db_root_stage[DB_ROOT_LEN];
100 static ssize_t target_core_item_dbroot_show(struct config_item *item,
103 return sprintf(page, "%s\n", db_root);
106 static ssize_t target_core_item_dbroot_store(struct config_item *item,
107 const char *page, size_t count)
113 mutex_lock(&target_devices_lock);
114 if (target_devices) {
115 pr_err("db_root: cannot be changed because it's in use\n");
119 if (count > (DB_ROOT_LEN - 1)) {
120 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
121 (int)count, DB_ROOT_LEN - 1);
125 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
129 if (db_root_stage[read_bytes - 1] == '\n')
130 db_root_stage[read_bytes - 1] = '\0';
132 /* validate new db root before accepting it */
133 fp = filp_open(db_root_stage, O_RDONLY, 0);
135 pr_err("db_root: cannot open: %s\n", db_root_stage);
138 if (!S_ISDIR(file_inode(fp)->i_mode)) {
139 filp_close(fp, NULL);
140 pr_err("db_root: not a directory: %s\n", db_root_stage);
143 filp_close(fp, NULL);
145 strncpy(db_root, db_root_stage, read_bytes);
146 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
151 mutex_unlock(&target_devices_lock);
155 CONFIGFS_ATTR(target_core_item_, dbroot);
157 static struct target_fabric_configfs *target_core_get_fabric(
160 struct target_fabric_configfs *tf;
165 mutex_lock(&g_tf_lock);
166 list_for_each_entry(tf, &g_tf_list, tf_list) {
167 const char *cmp_name = tf->tf_ops->fabric_alias;
169 cmp_name = tf->tf_ops->fabric_name;
170 if (!strcmp(cmp_name, name)) {
171 atomic_inc(&tf->tf_access_cnt);
172 mutex_unlock(&g_tf_lock);
176 mutex_unlock(&g_tf_lock);
182 * Called from struct target_core_group_ops->make_group()
184 static struct config_group *target_core_register_fabric(
185 struct config_group *group,
188 struct target_fabric_configfs *tf;
191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
192 " %s\n", group, name);
194 tf = target_core_get_fabric(name);
196 pr_debug("target_core_register_fabric() trying autoload for %s\n",
200 * Below are some hardcoded request_module() calls to automatically
201 * local fabric modules when the following is called:
203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
205 * Note that this does not limit which TCM fabric module can be
206 * registered, but simply provids auto loading logic for modules with
207 * mkdir(2) system calls with known TCM fabric modules.
210 if (!strncmp(name, "iscsi", 5)) {
212 * Automatically load the LIO Target fabric module when the
213 * following is called:
215 * mkdir -p $CONFIGFS/target/iscsi
217 ret = request_module("iscsi_target_mod");
219 pr_debug("request_module() failed for"
220 " iscsi_target_mod.ko: %d\n", ret);
221 return ERR_PTR(-EINVAL);
223 } else if (!strncmp(name, "loopback", 8)) {
225 * Automatically load the tcm_loop fabric module when the
226 * following is called:
228 * mkdir -p $CONFIGFS/target/loopback
230 ret = request_module("tcm_loop");
232 pr_debug("request_module() failed for"
233 " tcm_loop.ko: %d\n", ret);
234 return ERR_PTR(-EINVAL);
238 tf = target_core_get_fabric(name);
242 pr_debug("target_core_get_fabric() failed for %s\n",
244 return ERR_PTR(-EINVAL);
246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
247 " %s\n", tf->tf_ops->fabric_name);
249 * On a successful target_core_get_fabric() look, the returned
250 * struct target_fabric_configfs *tf will contain a usage reference.
252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
255 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
257 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
258 &tf->tf_discovery_cit);
259 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
262 config_item_name(&tf->tf_group.cg_item));
263 return &tf->tf_group;
267 * Called from struct target_core_group_ops->drop_item()
269 static void target_core_deregister_fabric(
270 struct config_group *group,
271 struct config_item *item)
273 struct target_fabric_configfs *tf = container_of(
274 to_config_group(item), struct target_fabric_configfs, tf_group);
276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
277 " tf list\n", config_item_name(item));
279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
280 " %s\n", tf->tf_ops->fabric_name);
281 atomic_dec(&tf->tf_access_cnt);
283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
284 " %s\n", config_item_name(item));
286 configfs_remove_default_groups(&tf->tf_group);
287 config_item_put(item);
290 static struct configfs_group_operations target_core_fabric_group_ops = {
291 .make_group = &target_core_register_fabric,
292 .drop_item = &target_core_deregister_fabric,
296 * All item attributes appearing in /sys/kernel/target/ appear here.
298 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
299 &target_core_item_attr_version,
300 &target_core_item_attr_dbroot,
305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
307 static const struct config_item_type target_core_fabrics_item = {
308 .ct_group_ops = &target_core_fabric_group_ops,
309 .ct_attrs = target_core_fabric_item_attrs,
310 .ct_owner = THIS_MODULE,
313 static struct configfs_subsystem target_core_fabrics = {
316 .ci_namebuf = "target",
317 .ci_type = &target_core_fabrics_item,
322 int target_depend_item(struct config_item *item)
324 return configfs_depend_item(&target_core_fabrics, item);
326 EXPORT_SYMBOL(target_depend_item);
328 void target_undepend_item(struct config_item *item)
330 return configfs_undepend_item(item);
332 EXPORT_SYMBOL(target_undepend_item);
334 /*##############################################################################
335 // Start functions called by external Target Fabrics Modules
336 //############################################################################*/
338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
340 if (tfo->fabric_alias) {
341 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
342 pr_err("Passed alias: %s exceeds "
343 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
347 if (!tfo->fabric_name) {
348 pr_err("Missing tfo->fabric_name\n");
351 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
352 pr_err("Passed name: %s exceeds "
353 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
356 if (!tfo->tpg_get_wwn) {
357 pr_err("Missing tfo->tpg_get_wwn()\n");
360 if (!tfo->tpg_get_tag) {
361 pr_err("Missing tfo->tpg_get_tag()\n");
364 if (!tfo->tpg_check_demo_mode) {
365 pr_err("Missing tfo->tpg_check_demo_mode()\n");
368 if (!tfo->tpg_check_demo_mode_cache) {
369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
372 if (!tfo->tpg_check_demo_mode_write_protect) {
373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
376 if (!tfo->tpg_check_prod_mode_write_protect) {
377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
380 if (!tfo->tpg_get_inst_index) {
381 pr_err("Missing tfo->tpg_get_inst_index()\n");
384 if (!tfo->release_cmd) {
385 pr_err("Missing tfo->release_cmd()\n");
388 if (!tfo->sess_get_index) {
389 pr_err("Missing tfo->sess_get_index()\n");
392 if (!tfo->write_pending) {
393 pr_err("Missing tfo->write_pending()\n");
396 if (!tfo->set_default_node_attributes) {
397 pr_err("Missing tfo->set_default_node_attributes()\n");
400 if (!tfo->get_cmd_state) {
401 pr_err("Missing tfo->get_cmd_state()\n");
404 if (!tfo->queue_data_in) {
405 pr_err("Missing tfo->queue_data_in()\n");
408 if (!tfo->queue_status) {
409 pr_err("Missing tfo->queue_status()\n");
412 if (!tfo->queue_tm_rsp) {
413 pr_err("Missing tfo->queue_tm_rsp()\n");
416 if (!tfo->aborted_task) {
417 pr_err("Missing tfo->aborted_task()\n");
420 if (!tfo->check_stop_free) {
421 pr_err("Missing tfo->check_stop_free()\n");
425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
427 * target_core_fabric_configfs.c WWN+TPG group context code.
429 if (!tfo->fabric_make_wwn) {
430 pr_err("Missing tfo->fabric_make_wwn()\n");
433 if (!tfo->fabric_drop_wwn) {
434 pr_err("Missing tfo->fabric_drop_wwn()\n");
437 if (!tfo->fabric_make_tpg) {
438 pr_err("Missing tfo->fabric_make_tpg()\n");
441 if (!tfo->fabric_drop_tpg) {
442 pr_err("Missing tfo->fabric_drop_tpg()\n");
449 int target_register_template(const struct target_core_fabric_ops *fo)
451 struct target_fabric_configfs *tf;
454 ret = target_fabric_tf_ops_check(fo);
458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
460 pr_err("%s: could not allocate memory!\n", __func__);
464 INIT_LIST_HEAD(&tf->tf_list);
465 atomic_set(&tf->tf_access_cnt, 0);
467 target_fabric_setup_cits(tf);
469 mutex_lock(&g_tf_lock);
470 list_add_tail(&tf->tf_list, &g_tf_list);
471 mutex_unlock(&g_tf_lock);
475 EXPORT_SYMBOL(target_register_template);
477 void target_unregister_template(const struct target_core_fabric_ops *fo)
479 struct target_fabric_configfs *t;
481 mutex_lock(&g_tf_lock);
482 list_for_each_entry(t, &g_tf_list, tf_list) {
483 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
484 BUG_ON(atomic_read(&t->tf_access_cnt));
485 list_del(&t->tf_list);
486 mutex_unlock(&g_tf_lock);
488 * Wait for any outstanding fabric se_deve_entry->rcu_head
489 * callbacks to complete post kfree_rcu(), before allowing
490 * fabric driver unload of TFO->module to proceed.
493 kfree(t->tf_tpg_base_cit.ct_attrs);
498 mutex_unlock(&g_tf_lock);
500 EXPORT_SYMBOL(target_unregister_template);
502 /*##############################################################################
503 // Stop functions called by external Target Fabrics Modules
504 //############################################################################*/
506 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
508 return container_of(to_config_group(item), struct se_dev_attrib,
512 /* Start functions for struct config_item_type tb_dev_attrib_cit */
513 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
514 static ssize_t _name##_show(struct config_item *item, char *page) \
516 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
531 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
532 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
533 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
534 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
535 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
536 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
537 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
538 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
539 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
540 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
541 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
542 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
543 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
545 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
548 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
549 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
551 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
552 static ssize_t _name##_store(struct config_item *item, const char *page,\
555 struct se_dev_attrib *da = to_attrib(item); \
559 ret = kstrtou32(page, 0, &val); \
566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
567 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
569 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
570 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
572 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
573 static ssize_t _name##_store(struct config_item *item, const char *page, \
576 struct se_dev_attrib *da = to_attrib(item); \
580 ret = strtobool(page, &flag); \
587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
594 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
595 static ssize_t _name##_store(struct config_item *item, const char *page,\
598 printk_once(KERN_WARNING \
599 "ignoring deprecated %s attribute\n", \
600 __stringify(_name)); \
604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
605 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
607 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
609 const char *configname;
611 configname = config_item_name(&dev->dev_group.cg_item);
612 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
613 pr_warn("dev[%p]: Backstore name '%s' is too long for "
614 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
618 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
619 * here without potentially breaking existing setups, so continue to
620 * truncate one byte shorter than what can be carried in INQUIRY.
622 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
625 static ssize_t emulate_model_alias_store(struct config_item *item,
626 const char *page, size_t count)
628 struct se_dev_attrib *da = to_attrib(item);
629 struct se_device *dev = da->da_dev;
633 if (dev->export_count) {
634 pr_err("dev[%p]: Unable to change model alias"
635 " while export_count is %d\n",
636 dev, dev->export_count);
640 ret = strtobool(page, &flag);
644 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
646 dev_set_t10_wwn_model_alias(dev);
648 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
649 sizeof(dev->t10_wwn.model));
651 da->emulate_model_alias = flag;
655 static ssize_t emulate_write_cache_store(struct config_item *item,
656 const char *page, size_t count)
658 struct se_dev_attrib *da = to_attrib(item);
662 ret = strtobool(page, &flag);
666 if (flag && da->da_dev->transport->get_write_cache) {
667 pr_err("emulate_write_cache not supported for this device\n");
671 da->emulate_write_cache = flag;
672 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
677 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
678 const char *page, size_t count)
680 struct se_dev_attrib *da = to_attrib(item);
684 ret = kstrtou32(page, 0, &val);
688 if (val != TARGET_UA_INTLCK_CTRL_CLEAR
689 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
690 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
691 pr_err("Illegal value %d\n", val);
695 if (da->da_dev->export_count) {
696 pr_err("dev[%p]: Unable to change SE Device"
697 " UA_INTRLCK_CTRL while export_count is %d\n",
698 da->da_dev, da->da_dev->export_count);
701 da->emulate_ua_intlck_ctrl = val;
702 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
707 static ssize_t emulate_tas_store(struct config_item *item,
708 const char *page, size_t count)
710 struct se_dev_attrib *da = to_attrib(item);
714 ret = strtobool(page, &flag);
718 if (da->da_dev->export_count) {
719 pr_err("dev[%p]: Unable to change SE Device TAS while"
720 " export_count is %d\n",
721 da->da_dev, da->da_dev->export_count);
724 da->emulate_tas = flag;
725 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
726 da->da_dev, flag ? "Enabled" : "Disabled");
731 static ssize_t emulate_tpu_store(struct config_item *item,
732 const char *page, size_t count)
734 struct se_dev_attrib *da = to_attrib(item);
738 ret = strtobool(page, &flag);
743 * We expect this value to be non-zero when generic Block Layer
744 * Discard supported is detected iblock_create_virtdevice().
746 if (flag && !da->max_unmap_block_desc_count) {
747 pr_err("Generic Block Discard not supported\n");
751 da->emulate_tpu = flag;
752 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
757 static ssize_t emulate_tpws_store(struct config_item *item,
758 const char *page, size_t count)
760 struct se_dev_attrib *da = to_attrib(item);
764 ret = strtobool(page, &flag);
769 * We expect this value to be non-zero when generic Block Layer
770 * Discard supported is detected iblock_create_virtdevice().
772 if (flag && !da->max_unmap_block_desc_count) {
773 pr_err("Generic Block Discard not supported\n");
777 da->emulate_tpws = flag;
778 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
783 static ssize_t pi_prot_type_store(struct config_item *item,
784 const char *page, size_t count)
786 struct se_dev_attrib *da = to_attrib(item);
787 int old_prot = da->pi_prot_type, ret;
788 struct se_device *dev = da->da_dev;
791 ret = kstrtou32(page, 0, &flag);
795 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
796 pr_err("Illegal value %d for pi_prot_type\n", flag);
800 pr_err("DIF TYPE2 protection currently not supported\n");
803 if (da->hw_pi_prot_type) {
804 pr_warn("DIF protection enabled on underlying hardware,"
808 if (!dev->transport->init_prot || !dev->transport->free_prot) {
809 /* 0 is only allowed value for non-supporting backends */
813 pr_err("DIF protection not supported by backend: %s\n",
814 dev->transport->name);
817 if (!target_dev_configured(dev)) {
818 pr_err("DIF protection requires device to be configured\n");
821 if (dev->export_count) {
822 pr_err("dev[%p]: Unable to change SE Device PROT type while"
823 " export_count is %d\n", dev, dev->export_count);
827 da->pi_prot_type = flag;
829 if (flag && !old_prot) {
830 ret = dev->transport->init_prot(dev);
832 da->pi_prot_type = old_prot;
833 da->pi_prot_verify = (bool) da->pi_prot_type;
837 } else if (!flag && old_prot) {
838 dev->transport->free_prot(dev);
841 da->pi_prot_verify = (bool) da->pi_prot_type;
842 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
846 /* always zero, but attr needs to remain RW to avoid userspace breakage */
847 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
849 return snprintf(page, PAGE_SIZE, "0\n");
852 static ssize_t pi_prot_format_store(struct config_item *item,
853 const char *page, size_t count)
855 struct se_dev_attrib *da = to_attrib(item);
856 struct se_device *dev = da->da_dev;
860 ret = strtobool(page, &flag);
867 if (!dev->transport->format_prot) {
868 pr_err("DIF protection format not supported by backend %s\n",
869 dev->transport->name);
872 if (!target_dev_configured(dev)) {
873 pr_err("DIF protection format requires device to be configured\n");
876 if (dev->export_count) {
877 pr_err("dev[%p]: Unable to format SE Device PROT type while"
878 " export_count is %d\n", dev, dev->export_count);
882 ret = dev->transport->format_prot(dev);
886 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
890 static ssize_t pi_prot_verify_store(struct config_item *item,
891 const char *page, size_t count)
893 struct se_dev_attrib *da = to_attrib(item);
897 ret = strtobool(page, &flag);
902 da->pi_prot_verify = flag;
905 if (da->hw_pi_prot_type) {
906 pr_warn("DIF protection enabled on underlying hardware,"
910 if (!da->pi_prot_type) {
911 pr_warn("DIF protection not supported by backend, ignoring\n");
914 da->pi_prot_verify = flag;
919 static ssize_t force_pr_aptpl_store(struct config_item *item,
920 const char *page, size_t count)
922 struct se_dev_attrib *da = to_attrib(item);
926 ret = strtobool(page, &flag);
929 if (da->da_dev->export_count) {
930 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
931 " export_count is %d\n",
932 da->da_dev, da->da_dev->export_count);
936 da->force_pr_aptpl = flag;
937 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
941 static ssize_t emulate_rest_reord_store(struct config_item *item,
942 const char *page, size_t count)
944 struct se_dev_attrib *da = to_attrib(item);
948 ret = strtobool(page, &flag);
953 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
954 " reordering not implemented\n", da->da_dev);
957 da->emulate_rest_reord = flag;
958 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
963 static ssize_t unmap_zeroes_data_store(struct config_item *item,
964 const char *page, size_t count)
966 struct se_dev_attrib *da = to_attrib(item);
970 ret = strtobool(page, &flag);
974 if (da->da_dev->export_count) {
975 pr_err("dev[%p]: Unable to change SE Device"
976 " unmap_zeroes_data while export_count is %d\n",
977 da->da_dev, da->da_dev->export_count);
981 * We expect this value to be non-zero when generic Block Layer
982 * Discard supported is detected iblock_configure_device().
984 if (flag && !da->max_unmap_block_desc_count) {
985 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
986 " because max_unmap_block_desc_count is zero\n",
990 da->unmap_zeroes_data = flag;
991 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
997 * Note, this can only be called on unexported SE Device Object.
999 static ssize_t queue_depth_store(struct config_item *item,
1000 const char *page, size_t count)
1002 struct se_dev_attrib *da = to_attrib(item);
1003 struct se_device *dev = da->da_dev;
1007 ret = kstrtou32(page, 0, &val);
1011 if (dev->export_count) {
1012 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1013 " export_count is %d\n",
1014 dev, dev->export_count);
1018 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1022 if (val > dev->dev_attrib.queue_depth) {
1023 if (val > dev->dev_attrib.hw_queue_depth) {
1024 pr_err("dev[%p]: Passed queue_depth:"
1025 " %u exceeds TCM/SE_Device MAX"
1026 " TCQ: %u\n", dev, val,
1027 dev->dev_attrib.hw_queue_depth);
1031 da->queue_depth = dev->queue_depth = val;
1032 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1036 static ssize_t optimal_sectors_store(struct config_item *item,
1037 const char *page, size_t count)
1039 struct se_dev_attrib *da = to_attrib(item);
1043 ret = kstrtou32(page, 0, &val);
1047 if (da->da_dev->export_count) {
1048 pr_err("dev[%p]: Unable to change SE Device"
1049 " optimal_sectors while export_count is %d\n",
1050 da->da_dev, da->da_dev->export_count);
1053 if (val > da->hw_max_sectors) {
1054 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1055 " greater than hw_max_sectors: %u\n",
1056 da->da_dev, val, da->hw_max_sectors);
1060 da->optimal_sectors = val;
1061 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1066 static ssize_t block_size_store(struct config_item *item,
1067 const char *page, size_t count)
1069 struct se_dev_attrib *da = to_attrib(item);
1073 ret = kstrtou32(page, 0, &val);
1077 if (da->da_dev->export_count) {
1078 pr_err("dev[%p]: Unable to change SE Device block_size"
1079 " while export_count is %d\n",
1080 da->da_dev, da->da_dev->export_count);
1084 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1085 pr_err("dev[%p]: Illegal value for block_device: %u"
1086 " for SE device, must be 512, 1024, 2048 or 4096\n",
1091 da->block_size = val;
1092 if (da->max_bytes_per_io)
1093 da->hw_max_sectors = da->max_bytes_per_io / val;
1095 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1100 static ssize_t alua_support_show(struct config_item *item, char *page)
1102 struct se_dev_attrib *da = to_attrib(item);
1103 u8 flags = da->da_dev->transport_flags;
1105 return snprintf(page, PAGE_SIZE, "%d\n",
1106 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1109 static ssize_t alua_support_store(struct config_item *item,
1110 const char *page, size_t count)
1112 struct se_dev_attrib *da = to_attrib(item);
1113 struct se_device *dev = da->da_dev;
1117 ret = strtobool(page, &flag);
1121 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1122 if (flag == oldflag)
1125 if (!(dev->transport->transport_flags_changeable &
1126 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1127 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1128 " alua_support has fixed value\n", dev);
1133 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1135 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1139 static ssize_t pgr_support_show(struct config_item *item, char *page)
1141 struct se_dev_attrib *da = to_attrib(item);
1142 u8 flags = da->da_dev->transport_flags;
1144 return snprintf(page, PAGE_SIZE, "%d\n",
1145 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1148 static ssize_t pgr_support_store(struct config_item *item,
1149 const char *page, size_t count)
1151 struct se_dev_attrib *da = to_attrib(item);
1152 struct se_device *dev = da->da_dev;
1156 ret = strtobool(page, &flag);
1160 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1161 if (flag == oldflag)
1164 if (!(dev->transport->transport_flags_changeable &
1165 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1166 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1167 " pgr_support has fixed value\n", dev);
1172 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1174 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1178 CONFIGFS_ATTR(, emulate_model_alias);
1179 CONFIGFS_ATTR(, emulate_dpo);
1180 CONFIGFS_ATTR(, emulate_fua_write);
1181 CONFIGFS_ATTR(, emulate_fua_read);
1182 CONFIGFS_ATTR(, emulate_write_cache);
1183 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1184 CONFIGFS_ATTR(, emulate_tas);
1185 CONFIGFS_ATTR(, emulate_tpu);
1186 CONFIGFS_ATTR(, emulate_tpws);
1187 CONFIGFS_ATTR(, emulate_caw);
1188 CONFIGFS_ATTR(, emulate_3pc);
1189 CONFIGFS_ATTR(, emulate_pr);
1190 CONFIGFS_ATTR(, pi_prot_type);
1191 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1192 CONFIGFS_ATTR(, pi_prot_format);
1193 CONFIGFS_ATTR(, pi_prot_verify);
1194 CONFIGFS_ATTR(, enforce_pr_isids);
1195 CONFIGFS_ATTR(, is_nonrot);
1196 CONFIGFS_ATTR(, emulate_rest_reord);
1197 CONFIGFS_ATTR(, force_pr_aptpl);
1198 CONFIGFS_ATTR_RO(, hw_block_size);
1199 CONFIGFS_ATTR(, block_size);
1200 CONFIGFS_ATTR_RO(, hw_max_sectors);
1201 CONFIGFS_ATTR(, optimal_sectors);
1202 CONFIGFS_ATTR_RO(, hw_queue_depth);
1203 CONFIGFS_ATTR(, queue_depth);
1204 CONFIGFS_ATTR(, max_unmap_lba_count);
1205 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1206 CONFIGFS_ATTR(, unmap_granularity);
1207 CONFIGFS_ATTR(, unmap_granularity_alignment);
1208 CONFIGFS_ATTR(, unmap_zeroes_data);
1209 CONFIGFS_ATTR(, max_write_same_len);
1210 CONFIGFS_ATTR(, alua_support);
1211 CONFIGFS_ATTR(, pgr_support);
1214 * dev_attrib attributes for devices using the target core SBC/SPC
1215 * interpreter. Any backend using spc_parse_cdb should be using
1218 struct configfs_attribute *sbc_attrib_attrs[] = {
1219 &attr_emulate_model_alias,
1221 &attr_emulate_fua_write,
1222 &attr_emulate_fua_read,
1223 &attr_emulate_write_cache,
1224 &attr_emulate_ua_intlck_ctrl,
1232 &attr_hw_pi_prot_type,
1233 &attr_pi_prot_format,
1234 &attr_pi_prot_verify,
1235 &attr_enforce_pr_isids,
1237 &attr_emulate_rest_reord,
1238 &attr_force_pr_aptpl,
1239 &attr_hw_block_size,
1241 &attr_hw_max_sectors,
1242 &attr_optimal_sectors,
1243 &attr_hw_queue_depth,
1245 &attr_max_unmap_lba_count,
1246 &attr_max_unmap_block_desc_count,
1247 &attr_unmap_granularity,
1248 &attr_unmap_granularity_alignment,
1249 &attr_unmap_zeroes_data,
1250 &attr_max_write_same_len,
1255 EXPORT_SYMBOL(sbc_attrib_attrs);
1258 * Minimal dev_attrib attributes for devices passing through CDBs.
1259 * In this case we only provide a few read-only attributes for
1260 * backwards compatibility.
1262 struct configfs_attribute *passthrough_attrib_attrs[] = {
1263 &attr_hw_pi_prot_type,
1264 &attr_hw_block_size,
1265 &attr_hw_max_sectors,
1266 &attr_hw_queue_depth,
1272 EXPORT_SYMBOL(passthrough_attrib_attrs);
1275 * pr related dev_attrib attributes for devices passing through CDBs,
1276 * but allowing in core pr emulation.
1278 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1279 &attr_enforce_pr_isids,
1280 &attr_force_pr_aptpl,
1283 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1285 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1286 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1288 /* End functions for struct config_item_type tb_dev_attrib_cit */
1290 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1292 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1294 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1297 static ssize_t target_check_inquiry_data(char *buf)
1306 * ASCII data fields shall contain only ASCII printable characters
1307 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1308 * more ASCII null (00h) characters.
1310 for (i = 0; i < len; i++) {
1311 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1312 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1321 * STANDARD and VPD page 0x83 T10 Vendor Identification
1323 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1326 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1329 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1330 const char *page, size_t count)
1332 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1333 struct se_device *dev = t10_wwn->t10_dev;
1334 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1335 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1336 char *stripped = NULL;
1340 len = strlcpy(buf, page, sizeof(buf));
1341 if (len < sizeof(buf)) {
1342 /* Strip any newline added from userspace. */
1343 stripped = strstrip(buf);
1344 len = strlen(stripped);
1346 if (len > INQUIRY_VENDOR_LEN) {
1347 pr_err("Emulated T10 Vendor Identification exceeds"
1348 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1353 ret = target_check_inquiry_data(stripped);
1359 * Check to see if any active exports exist. If they do exist, fail
1360 * here as changing this information on the fly (underneath the
1361 * initiator side OS dependent multipath code) could cause negative
1364 if (dev->export_count) {
1365 pr_err("Unable to set T10 Vendor Identification while"
1366 " active %d exports exist\n", dev->export_count);
1370 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1371 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1373 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1374 " %s\n", dev->t10_wwn.vendor);
1379 static ssize_t target_wwn_product_id_show(struct config_item *item,
1382 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1385 static ssize_t target_wwn_product_id_store(struct config_item *item,
1386 const char *page, size_t count)
1388 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1389 struct se_device *dev = t10_wwn->t10_dev;
1390 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1391 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1392 char *stripped = NULL;
1396 len = strlcpy(buf, page, sizeof(buf));
1397 if (len < sizeof(buf)) {
1398 /* Strip any newline added from userspace. */
1399 stripped = strstrip(buf);
1400 len = strlen(stripped);
1402 if (len > INQUIRY_MODEL_LEN) {
1403 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1404 __stringify(INQUIRY_MODEL_LEN)
1409 ret = target_check_inquiry_data(stripped);
1415 * Check to see if any active exports exist. If they do exist, fail
1416 * here as changing this information on the fly (underneath the
1417 * initiator side OS dependent multipath code) could cause negative
1420 if (dev->export_count) {
1421 pr_err("Unable to set T10 Model while active %d exports exist\n",
1426 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1427 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1429 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1430 dev->t10_wwn.model);
1435 static ssize_t target_wwn_revision_show(struct config_item *item,
1438 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1441 static ssize_t target_wwn_revision_store(struct config_item *item,
1442 const char *page, size_t count)
1444 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1445 struct se_device *dev = t10_wwn->t10_dev;
1446 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1447 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1448 char *stripped = NULL;
1452 len = strlcpy(buf, page, sizeof(buf));
1453 if (len < sizeof(buf)) {
1454 /* Strip any newline added from userspace. */
1455 stripped = strstrip(buf);
1456 len = strlen(stripped);
1458 if (len > INQUIRY_REVISION_LEN) {
1459 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1460 __stringify(INQUIRY_REVISION_LEN)
1465 ret = target_check_inquiry_data(stripped);
1471 * Check to see if any active exports exist. If they do exist, fail
1472 * here as changing this information on the fly (underneath the
1473 * initiator side OS dependent multipath code) could cause negative
1476 if (dev->export_count) {
1477 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1482 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1483 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1485 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1486 dev->t10_wwn.revision);
1492 target_wwn_company_id_show(struct config_item *item,
1495 return snprintf(page, PAGE_SIZE, "%#08x\n",
1496 to_t10_wwn(item)->company_id);
1500 target_wwn_company_id_store(struct config_item *item,
1501 const char *page, size_t count)
1503 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1504 struct se_device *dev = t10_wwn->t10_dev;
1509 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1510 * form OUI assigned by the IEEE.
1512 ret = kstrtou32(page, 0, &val);
1516 if (val >= 0x1000000)
1520 * Check to see if any active exports exist. If they do exist, fail
1521 * here as changing this information on the fly (underneath the
1522 * initiator side OS dependent multipath code) could cause negative
1525 if (dev->export_count) {
1526 pr_err("Unable to set Company ID while %u exports exist\n",
1531 t10_wwn->company_id = val;
1533 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1534 t10_wwn->company_id);
1540 * VPD page 0x80 Unit serial
1542 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1545 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1546 &to_t10_wwn(item)->unit_serial[0]);
1549 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1550 const char *page, size_t count)
1552 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1553 struct se_device *dev = t10_wwn->t10_dev;
1554 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1557 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1558 * from the struct scsi_device level firmware, do not allow
1559 * VPD Unit Serial to be emulated.
1561 * Note this struct scsi_device could also be emulating VPD
1562 * information from its drivers/scsi LLD. But for now we assume
1563 * it is doing 'the right thing' wrt a world wide unique
1564 * VPD Unit Serial Number that OS dependent multipath can depend on.
1566 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1567 pr_err("Underlying SCSI device firmware provided VPD"
1568 " Unit Serial, ignoring request\n");
1572 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1573 pr_err("Emulated VPD Unit Serial exceeds"
1574 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1578 * Check to see if any active $FABRIC_MOD exports exist. If they
1579 * do exist, fail here as changing this information on the fly
1580 * (underneath the initiator side OS dependent multipath code)
1581 * could cause negative effects.
1583 if (dev->export_count) {
1584 pr_err("Unable to set VPD Unit Serial while"
1585 " active %d $FABRIC_MOD exports exist\n",
1591 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1593 * Also, strip any newline added from the userspace
1594 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1596 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1597 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1598 "%s", strstrip(buf));
1599 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1601 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1602 " %s\n", dev->t10_wwn.unit_serial);
1608 * VPD page 0x83 Protocol Identifier
1610 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1613 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1614 struct t10_vpd *vpd;
1615 unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1618 spin_lock(&t10_wwn->t10_vpd_lock);
1619 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1620 if (!vpd->protocol_identifier_set)
1623 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1625 if (len + strlen(buf) >= PAGE_SIZE)
1628 len += sprintf(page+len, "%s", buf);
1630 spin_unlock(&t10_wwn->t10_vpd_lock);
1636 * Generic wrapper for dumping VPD identifiers by association.
1638 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1639 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1642 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1643 struct t10_vpd *vpd; \
1644 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1647 spin_lock(&t10_wwn->t10_vpd_lock); \
1648 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1649 if (vpd->association != _assoc) \
1652 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1653 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1654 if (len + strlen(buf) >= PAGE_SIZE) \
1656 len += sprintf(page+len, "%s", buf); \
1658 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1659 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1660 if (len + strlen(buf) >= PAGE_SIZE) \
1662 len += sprintf(page+len, "%s", buf); \
1664 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1665 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1666 if (len + strlen(buf) >= PAGE_SIZE) \
1668 len += sprintf(page+len, "%s", buf); \
1670 spin_unlock(&t10_wwn->t10_vpd_lock); \
1675 /* VPD page 0x83 Association: Logical Unit */
1676 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1677 /* VPD page 0x83 Association: Target Port */
1678 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1679 /* VPD page 0x83 Association: SCSI Target Device */
1680 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1682 CONFIGFS_ATTR(target_wwn_, vendor_id);
1683 CONFIGFS_ATTR(target_wwn_, product_id);
1684 CONFIGFS_ATTR(target_wwn_, revision);
1685 CONFIGFS_ATTR(target_wwn_, company_id);
1686 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1687 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1688 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1689 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1690 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1692 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1693 &target_wwn_attr_vendor_id,
1694 &target_wwn_attr_product_id,
1695 &target_wwn_attr_revision,
1696 &target_wwn_attr_company_id,
1697 &target_wwn_attr_vpd_unit_serial,
1698 &target_wwn_attr_vpd_protocol_identifier,
1699 &target_wwn_attr_vpd_assoc_logical_unit,
1700 &target_wwn_attr_vpd_assoc_target_port,
1701 &target_wwn_attr_vpd_assoc_scsi_target_device,
1705 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1707 /* End functions for struct config_item_type tb_dev_wwn_cit */
1709 /* Start functions for struct config_item_type tb_dev_pr_cit */
1711 static struct se_device *pr_to_dev(struct config_item *item)
1713 return container_of(to_config_group(item), struct se_device,
1717 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1720 struct se_node_acl *se_nacl;
1721 struct t10_pr_registration *pr_reg;
1722 char i_buf[PR_REG_ISID_ID_LEN] = { };
1724 pr_reg = dev->dev_pr_res_holder;
1726 return sprintf(page, "No SPC-3 Reservation holder\n");
1728 se_nacl = pr_reg->pr_reg_nacl;
1729 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1731 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1732 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1733 se_nacl->initiatorname, i_buf);
1736 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1739 struct se_session *sess = dev->reservation_holder;
1740 struct se_node_acl *se_nacl;
1744 se_nacl = sess->se_node_acl;
1746 "SPC-2 Reservation: %s Initiator: %s\n",
1747 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1748 se_nacl->initiatorname);
1750 len = sprintf(page, "No SPC-2 Reservation holder\n");
1755 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1757 struct se_device *dev = pr_to_dev(item);
1760 if (!dev->dev_attrib.emulate_pr)
1761 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1763 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1764 return sprintf(page, "Passthrough\n");
1766 spin_lock(&dev->dev_reservation_lock);
1767 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1768 ret = target_core_dev_pr_show_spc2_res(dev, page);
1770 ret = target_core_dev_pr_show_spc3_res(dev, page);
1771 spin_unlock(&dev->dev_reservation_lock);
1775 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1778 struct se_device *dev = pr_to_dev(item);
1781 spin_lock(&dev->dev_reservation_lock);
1782 if (!dev->dev_pr_res_holder) {
1783 len = sprintf(page, "No SPC-3 Reservation holder\n");
1784 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1785 len = sprintf(page, "SPC-3 Reservation: All Target"
1786 " Ports registration\n");
1788 len = sprintf(page, "SPC-3 Reservation: Single"
1789 " Target Port registration\n");
1792 spin_unlock(&dev->dev_reservation_lock);
1796 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1799 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1803 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1806 struct se_device *dev = pr_to_dev(item);
1807 struct se_node_acl *se_nacl;
1808 struct se_portal_group *se_tpg;
1809 struct t10_pr_registration *pr_reg;
1810 const struct target_core_fabric_ops *tfo;
1813 spin_lock(&dev->dev_reservation_lock);
1814 pr_reg = dev->dev_pr_res_holder;
1816 len = sprintf(page, "No SPC-3 Reservation holder\n");
1820 se_nacl = pr_reg->pr_reg_nacl;
1821 se_tpg = se_nacl->se_tpg;
1822 tfo = se_tpg->se_tpg_tfo;
1824 len += sprintf(page+len, "SPC-3 Reservation: %s"
1825 " Target Node Endpoint: %s\n", tfo->fabric_name,
1826 tfo->tpg_get_wwn(se_tpg));
1827 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1828 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1829 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1830 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1831 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1834 spin_unlock(&dev->dev_reservation_lock);
1839 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1842 struct se_device *dev = pr_to_dev(item);
1843 const struct target_core_fabric_ops *tfo;
1844 struct t10_pr_registration *pr_reg;
1845 unsigned char buf[384];
1846 char i_buf[PR_REG_ISID_ID_LEN];
1850 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1852 spin_lock(&dev->t10_pr.registration_lock);
1853 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1856 memset(buf, 0, 384);
1857 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1858 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1859 core_pr_dump_initiator_port(pr_reg, i_buf,
1860 PR_REG_ISID_ID_LEN);
1861 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1863 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1864 pr_reg->pr_res_generation);
1866 if (len + strlen(buf) >= PAGE_SIZE)
1869 len += sprintf(page+len, "%s", buf);
1872 spin_unlock(&dev->t10_pr.registration_lock);
1875 len += sprintf(page+len, "None\n");
1880 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1882 struct se_device *dev = pr_to_dev(item);
1883 struct t10_pr_registration *pr_reg;
1886 spin_lock(&dev->dev_reservation_lock);
1887 pr_reg = dev->dev_pr_res_holder;
1889 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1890 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1892 len = sprintf(page, "No SPC-3 Reservation holder\n");
1895 spin_unlock(&dev->dev_reservation_lock);
1899 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1901 struct se_device *dev = pr_to_dev(item);
1903 if (!dev->dev_attrib.emulate_pr)
1904 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1905 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1906 return sprintf(page, "SPC_PASSTHROUGH\n");
1907 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1908 return sprintf(page, "SPC2_RESERVATIONS\n");
1910 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1913 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1916 struct se_device *dev = pr_to_dev(item);
1918 if (!dev->dev_attrib.emulate_pr ||
1919 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1922 return sprintf(page, "APTPL Bit Status: %s\n",
1923 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1926 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1929 struct se_device *dev = pr_to_dev(item);
1931 if (!dev->dev_attrib.emulate_pr ||
1932 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1935 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1939 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1940 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1941 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1942 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1945 static match_table_t tokens = {
1946 {Opt_initiator_fabric, "initiator_fabric=%s"},
1947 {Opt_initiator_node, "initiator_node=%s"},
1948 {Opt_initiator_sid, "initiator_sid=%s"},
1949 {Opt_sa_res_key, "sa_res_key=%s"},
1950 {Opt_res_holder, "res_holder=%d"},
1951 {Opt_res_type, "res_type=%d"},
1952 {Opt_res_scope, "res_scope=%d"},
1953 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1954 {Opt_mapped_lun, "mapped_lun=%u"},
1955 {Opt_target_fabric, "target_fabric=%s"},
1956 {Opt_target_node, "target_node=%s"},
1957 {Opt_tpgt, "tpgt=%d"},
1958 {Opt_port_rtpi, "port_rtpi=%d"},
1959 {Opt_target_lun, "target_lun=%u"},
1963 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1964 const char *page, size_t count)
1966 struct se_device *dev = pr_to_dev(item);
1967 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1968 unsigned char *t_fabric = NULL, *t_port = NULL;
1969 char *orig, *ptr, *opts;
1970 substring_t args[MAX_OPT_ARGS];
1971 unsigned long long tmp_ll;
1973 u64 mapped_lun = 0, target_lun = 0;
1974 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1978 if (!dev->dev_attrib.emulate_pr ||
1979 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1981 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1984 if (dev->export_count) {
1985 pr_debug("Unable to process APTPL metadata while"
1986 " active fabric exports exist\n");
1990 opts = kstrdup(page, GFP_KERNEL);
1995 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1999 token = match_token(ptr, tokens, args);
2001 case Opt_initiator_fabric:
2002 i_fabric = match_strdup(args);
2008 case Opt_initiator_node:
2009 i_port = match_strdup(args);
2014 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2015 pr_err("APTPL metadata initiator_node="
2016 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2017 PR_APTPL_MAX_IPORT_LEN);
2022 case Opt_initiator_sid:
2023 isid = match_strdup(args);
2028 if (strlen(isid) >= PR_REG_ISID_LEN) {
2029 pr_err("APTPL metadata initiator_isid"
2030 "= exceeds PR_REG_ISID_LEN: %d\n",
2036 case Opt_sa_res_key:
2037 ret = match_u64(args, &tmp_ll);
2039 pr_err("kstrtoull() failed for sa_res_key=\n");
2042 sa_res_key = (u64)tmp_ll;
2045 * PR APTPL Metadata for Reservation
2047 case Opt_res_holder:
2048 ret = match_int(args, &arg);
2054 ret = match_int(args, &arg);
2060 ret = match_int(args, &arg);
2064 case Opt_res_all_tg_pt:
2065 ret = match_int(args, &arg);
2068 all_tg_pt = (int)arg;
2070 case Opt_mapped_lun:
2071 ret = match_u64(args, &tmp_ll);
2074 mapped_lun = (u64)tmp_ll;
2077 * PR APTPL Metadata for Target Port
2079 case Opt_target_fabric:
2080 t_fabric = match_strdup(args);
2086 case Opt_target_node:
2087 t_port = match_strdup(args);
2092 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2093 pr_err("APTPL metadata target_node="
2094 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2095 PR_APTPL_MAX_TPORT_LEN);
2101 ret = match_int(args, &arg);
2107 ret = match_int(args, &arg);
2111 case Opt_target_lun:
2112 ret = match_u64(args, &tmp_ll);
2115 target_lun = (u64)tmp_ll;
2122 if (!i_port || !t_port || !sa_res_key) {
2123 pr_err("Illegal parameters for APTPL registration\n");
2128 if (res_holder && !(type)) {
2129 pr_err("Illegal PR type: 0x%02x for reservation"
2135 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2136 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2137 res_holder, all_tg_pt, type);
2145 return (ret == 0) ? count : ret;
2149 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2150 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2151 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2152 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2153 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2154 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2155 CONFIGFS_ATTR_RO(target_pr_, res_type);
2156 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2157 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2159 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2160 &target_pr_attr_res_holder,
2161 &target_pr_attr_res_pr_all_tgt_pts,
2162 &target_pr_attr_res_pr_generation,
2163 &target_pr_attr_res_pr_holder_tg_port,
2164 &target_pr_attr_res_pr_registered_i_pts,
2165 &target_pr_attr_res_pr_type,
2166 &target_pr_attr_res_type,
2167 &target_pr_attr_res_aptpl_active,
2168 &target_pr_attr_res_aptpl_metadata,
2172 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2174 /* End functions for struct config_item_type tb_dev_pr_cit */
2176 /* Start functions for struct config_item_type tb_dev_cit */
2178 static inline struct se_device *to_device(struct config_item *item)
2180 return container_of(to_config_group(item), struct se_device, dev_group);
2183 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2185 struct se_device *dev = to_device(item);
2187 ssize_t read_bytes = 0;
2189 transport_dump_dev_state(dev, page, &bl);
2191 read_bytes += dev->transport->show_configfs_dev_params(dev,
2196 static ssize_t target_dev_control_store(struct config_item *item,
2197 const char *page, size_t count)
2199 struct se_device *dev = to_device(item);
2201 return dev->transport->set_configfs_dev_params(dev, page, count);
2204 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2206 struct se_device *dev = to_device(item);
2208 if (!(dev->dev_flags & DF_USING_ALIAS))
2211 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2214 static ssize_t target_dev_alias_store(struct config_item *item,
2215 const char *page, size_t count)
2217 struct se_device *dev = to_device(item);
2218 struct se_hba *hba = dev->se_hba;
2221 if (count > (SE_DEV_ALIAS_LEN-1)) {
2222 pr_err("alias count: %d exceeds"
2223 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2224 SE_DEV_ALIAS_LEN-1);
2228 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2231 if (dev->dev_alias[read_bytes - 1] == '\n')
2232 dev->dev_alias[read_bytes - 1] = '\0';
2234 dev->dev_flags |= DF_USING_ALIAS;
2236 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2237 config_item_name(&hba->hba_group.cg_item),
2238 config_item_name(&dev->dev_group.cg_item),
2244 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2246 struct se_device *dev = to_device(item);
2248 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2251 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2254 static ssize_t target_dev_udev_path_store(struct config_item *item,
2255 const char *page, size_t count)
2257 struct se_device *dev = to_device(item);
2258 struct se_hba *hba = dev->se_hba;
2261 if (count > (SE_UDEV_PATH_LEN-1)) {
2262 pr_err("udev_path count: %d exceeds"
2263 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2264 SE_UDEV_PATH_LEN-1);
2268 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2272 if (dev->udev_path[read_bytes - 1] == '\n')
2273 dev->udev_path[read_bytes - 1] = '\0';
2275 dev->dev_flags |= DF_USING_UDEV_PATH;
2277 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2278 config_item_name(&hba->hba_group.cg_item),
2279 config_item_name(&dev->dev_group.cg_item),
2285 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2287 struct se_device *dev = to_device(item);
2289 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2292 static ssize_t target_dev_enable_store(struct config_item *item,
2293 const char *page, size_t count)
2295 struct se_device *dev = to_device(item);
2299 ptr = strstr(page, "1");
2301 pr_err("For dev_enable ops, only valid value"
2306 ret = target_configure_device(dev);
2312 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2314 struct se_device *dev = to_device(item);
2315 struct config_item *lu_ci;
2316 struct t10_alua_lu_gp *lu_gp;
2317 struct t10_alua_lu_gp_member *lu_gp_mem;
2320 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2324 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2325 lu_gp = lu_gp_mem->lu_gp;
2327 lu_ci = &lu_gp->lu_gp_group.cg_item;
2328 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2329 config_item_name(lu_ci), lu_gp->lu_gp_id);
2331 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2336 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2337 const char *page, size_t count)
2339 struct se_device *dev = to_device(item);
2340 struct se_hba *hba = dev->se_hba;
2341 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2342 struct t10_alua_lu_gp_member *lu_gp_mem;
2343 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2346 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2350 if (count > LU_GROUP_NAME_BUF) {
2351 pr_err("ALUA LU Group Alias too large!\n");
2354 memcpy(buf, page, count);
2356 * Any ALUA logical unit alias besides "NULL" means we will be
2357 * making a new group association.
2359 if (strcmp(strstrip(buf), "NULL")) {
2361 * core_alua_get_lu_gp_by_name() will increment reference to
2362 * struct t10_alua_lu_gp. This reference is released with
2363 * core_alua_get_lu_gp_by_name below().
2365 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2370 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2371 lu_gp = lu_gp_mem->lu_gp;
2374 * Clearing an existing lu_gp association, and replacing
2378 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2379 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2381 config_item_name(&hba->hba_group.cg_item),
2382 config_item_name(&dev->dev_group.cg_item),
2383 config_item_name(&lu_gp->lu_gp_group.cg_item),
2386 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2387 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2392 * Removing existing association of lu_gp_mem with lu_gp
2394 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2398 * Associate lu_gp_mem with lu_gp_new.
2400 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2401 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2403 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2404 " core/alua/lu_gps/%s, ID: %hu\n",
2405 (move) ? "Moving" : "Adding",
2406 config_item_name(&hba->hba_group.cg_item),
2407 config_item_name(&dev->dev_group.cg_item),
2408 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2409 lu_gp_new->lu_gp_id);
2411 core_alua_put_lu_gp_from_name(lu_gp_new);
2415 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2417 struct se_device *dev = to_device(item);
2418 struct t10_alua_lba_map *map;
2419 struct t10_alua_lba_map_member *mem;
2424 spin_lock(&dev->t10_alua.lba_map_lock);
2425 if (!list_empty(&dev->t10_alua.lba_map_list))
2426 bl += sprintf(b + bl, "%u %u\n",
2427 dev->t10_alua.lba_map_segment_size,
2428 dev->t10_alua.lba_map_segment_multiplier);
2429 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2430 bl += sprintf(b + bl, "%llu %llu",
2431 map->lba_map_first_lba, map->lba_map_last_lba);
2432 list_for_each_entry(mem, &map->lba_map_mem_list,
2434 switch (mem->lba_map_mem_alua_state) {
2435 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2438 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2441 case ALUA_ACCESS_STATE_STANDBY:
2444 case ALUA_ACCESS_STATE_UNAVAILABLE:
2451 bl += sprintf(b + bl, " %d:%c",
2452 mem->lba_map_mem_alua_pg_id, state);
2454 bl += sprintf(b + bl, "\n");
2456 spin_unlock(&dev->t10_alua.lba_map_lock);
2460 static ssize_t target_dev_lba_map_store(struct config_item *item,
2461 const char *page, size_t count)
2463 struct se_device *dev = to_device(item);
2464 struct t10_alua_lba_map *lba_map = NULL;
2465 struct list_head lba_list;
2466 char *map_entries, *orig, *ptr;
2468 int pg_num = -1, pg;
2469 int ret = 0, num = 0, pg_id, alua_state;
2470 unsigned long start_lba = -1, end_lba = -1;
2471 unsigned long segment_size = -1, segment_mult = -1;
2473 orig = map_entries = kstrdup(page, GFP_KERNEL);
2477 INIT_LIST_HEAD(&lba_list);
2478 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2483 if (sscanf(ptr, "%lu %lu\n",
2484 &segment_size, &segment_mult) != 2) {
2485 pr_err("Invalid line %d\n", num);
2492 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2493 pr_err("Invalid line %d\n", num);
2497 ptr = strchr(ptr, ' ');
2499 pr_err("Invalid line %d, missing end lba\n", num);
2504 ptr = strchr(ptr, ' ');
2506 pr_err("Invalid line %d, missing state definitions\n",
2512 lba_map = core_alua_allocate_lba_map(&lba_list,
2513 start_lba, end_lba);
2514 if (IS_ERR(lba_map)) {
2515 ret = PTR_ERR(lba_map);
2519 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2522 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2525 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2528 alua_state = ALUA_ACCESS_STATE_STANDBY;
2531 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2534 pr_err("Invalid ALUA state '%c'\n", state);
2539 ret = core_alua_allocate_lba_map_mem(lba_map,
2542 pr_err("Invalid target descriptor %d:%c "
2548 ptr = strchr(ptr, ' ');
2556 else if (pg != pg_num) {
2557 pr_err("Only %d from %d port groups definitions "
2558 "at line %d\n", pg, pg_num, num);
2566 core_alua_free_lba_map(&lba_list);
2569 core_alua_set_lba_map(dev, &lba_list,
2570 segment_size, segment_mult);
2575 CONFIGFS_ATTR_RO(target_dev_, info);
2576 CONFIGFS_ATTR_WO(target_dev_, control);
2577 CONFIGFS_ATTR(target_dev_, alias);
2578 CONFIGFS_ATTR(target_dev_, udev_path);
2579 CONFIGFS_ATTR(target_dev_, enable);
2580 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2581 CONFIGFS_ATTR(target_dev_, lba_map);
2583 static struct configfs_attribute *target_core_dev_attrs[] = {
2584 &target_dev_attr_info,
2585 &target_dev_attr_control,
2586 &target_dev_attr_alias,
2587 &target_dev_attr_udev_path,
2588 &target_dev_attr_enable,
2589 &target_dev_attr_alua_lu_gp,
2590 &target_dev_attr_lba_map,
2594 static void target_core_dev_release(struct config_item *item)
2596 struct config_group *dev_cg = to_config_group(item);
2597 struct se_device *dev =
2598 container_of(dev_cg, struct se_device, dev_group);
2600 target_free_device(dev);
2604 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2605 * within target_fabric_port_link()
2607 struct configfs_item_operations target_core_dev_item_ops = {
2608 .release = target_core_dev_release,
2611 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2613 /* End functions for struct config_item_type tb_dev_cit */
2615 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2617 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2619 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2623 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2625 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2627 if (!lu_gp->lu_gp_valid_id)
2629 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2632 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2633 const char *page, size_t count)
2635 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2636 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2637 unsigned long lu_gp_id;
2640 ret = kstrtoul(page, 0, &lu_gp_id);
2642 pr_err("kstrtoul() returned %d for"
2643 " lu_gp_id\n", ret);
2646 if (lu_gp_id > 0x0000ffff) {
2647 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2648 " 0x0000ffff\n", lu_gp_id);
2652 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2656 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2657 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2658 config_item_name(&alua_lu_gp_cg->cg_item),
2664 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2666 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2667 struct se_device *dev;
2669 struct t10_alua_lu_gp_member *lu_gp_mem;
2670 ssize_t len = 0, cur_len;
2671 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2673 spin_lock(&lu_gp->lu_gp_lock);
2674 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2675 dev = lu_gp_mem->lu_gp_mem_dev;
2678 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2679 config_item_name(&hba->hba_group.cg_item),
2680 config_item_name(&dev->dev_group.cg_item));
2681 cur_len++; /* Extra byte for NULL terminator */
2683 if ((cur_len + len) > PAGE_SIZE) {
2684 pr_warn("Ran out of lu_gp_show_attr"
2685 "_members buffer\n");
2688 memcpy(page+len, buf, cur_len);
2691 spin_unlock(&lu_gp->lu_gp_lock);
2696 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2697 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2699 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2700 &target_lu_gp_attr_lu_gp_id,
2701 &target_lu_gp_attr_members,
2705 static void target_core_alua_lu_gp_release(struct config_item *item)
2707 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2708 struct t10_alua_lu_gp, lu_gp_group);
2710 core_alua_free_lu_gp(lu_gp);
2713 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2714 .release = target_core_alua_lu_gp_release,
2717 static const struct config_item_type target_core_alua_lu_gp_cit = {
2718 .ct_item_ops = &target_core_alua_lu_gp_ops,
2719 .ct_attrs = target_core_alua_lu_gp_attrs,
2720 .ct_owner = THIS_MODULE,
2723 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2725 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2727 static struct config_group *target_core_alua_create_lu_gp(
2728 struct config_group *group,
2731 struct t10_alua_lu_gp *lu_gp;
2732 struct config_group *alua_lu_gp_cg = NULL;
2733 struct config_item *alua_lu_gp_ci = NULL;
2735 lu_gp = core_alua_allocate_lu_gp(name, 0);
2739 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2740 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2742 config_group_init_type_name(alua_lu_gp_cg, name,
2743 &target_core_alua_lu_gp_cit);
2745 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2746 " Group: core/alua/lu_gps/%s\n",
2747 config_item_name(alua_lu_gp_ci));
2749 return alua_lu_gp_cg;
2753 static void target_core_alua_drop_lu_gp(
2754 struct config_group *group,
2755 struct config_item *item)
2757 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2758 struct t10_alua_lu_gp, lu_gp_group);
2760 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2761 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2762 config_item_name(item), lu_gp->lu_gp_id);
2764 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2765 * -> target_core_alua_lu_gp_release()
2767 config_item_put(item);
2770 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2771 .make_group = &target_core_alua_create_lu_gp,
2772 .drop_item = &target_core_alua_drop_lu_gp,
2775 static const struct config_item_type target_core_alua_lu_gps_cit = {
2776 .ct_item_ops = NULL,
2777 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2778 .ct_owner = THIS_MODULE,
2781 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2783 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2785 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2787 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2791 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2794 return sprintf(page, "%d\n",
2795 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2798 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2799 const char *page, size_t count)
2801 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2802 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2806 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2807 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2810 if (!target_dev_configured(dev)) {
2811 pr_err("Unable to set alua_access_state while device is"
2812 " not configured\n");
2816 ret = kstrtoul(page, 0, &tmp);
2818 pr_err("Unable to extract new ALUA access state from"
2822 new_state = (int)tmp;
2824 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2825 pr_err("Unable to process implicit configfs ALUA"
2826 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2829 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2830 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2831 /* LBA DEPENDENT is only allowed with implicit ALUA */
2832 pr_err("Unable to process implicit configfs ALUA transition"
2833 " while explicit ALUA management is enabled\n");
2837 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2838 NULL, NULL, new_state, 0);
2839 return (!ret) ? count : -EINVAL;
2842 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2845 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2846 return sprintf(page, "%s\n",
2847 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2850 static ssize_t target_tg_pt_gp_alua_access_status_store(
2851 struct config_item *item, const char *page, size_t count)
2853 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2855 int new_status, ret;
2857 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2858 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2862 ret = kstrtoul(page, 0, &tmp);
2864 pr_err("Unable to extract new ALUA access status"
2865 " from %s\n", page);
2868 new_status = (int)tmp;
2870 if ((new_status != ALUA_STATUS_NONE) &&
2871 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2872 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2873 pr_err("Illegal ALUA access status: 0x%02x\n",
2878 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2882 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2885 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2888 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2889 const char *page, size_t count)
2891 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2894 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2895 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2896 struct config_item *item, char *p) \
2898 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2899 return sprintf(p, "%d\n", \
2900 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2903 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2904 struct config_item *item, const char *p, size_t c) \
2906 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2907 unsigned long tmp; \
2910 if (!t->tg_pt_gp_valid_id) { \
2911 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2915 ret = kstrtoul(p, 0, &tmp); \
2917 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2921 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2925 t->tg_pt_gp_alua_supported_states |= _bit; \
2927 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2932 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2933 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2934 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2935 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2936 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2937 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2938 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2940 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2941 struct config_item *item, char *page)
2943 return sprintf(page, "%d\n",
2944 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2947 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2948 struct config_item *item, const char *page, size_t count)
2950 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2954 ret = kstrtoul(page, 0, &tmp);
2956 pr_err("Unable to extract alua_write_metadata\n");
2960 if ((tmp != 0) && (tmp != 1)) {
2961 pr_err("Illegal value for alua_write_metadata:"
2965 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2970 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2973 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2976 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2977 const char *page, size_t count)
2979 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2983 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2986 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2989 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2990 const char *page, size_t count)
2992 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2996 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2997 struct config_item *item, char *page)
2999 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
3002 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
3003 struct config_item *item, const char *page, size_t count)
3005 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
3009 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3012 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3015 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3016 const char *page, size_t count)
3018 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3021 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3024 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3026 if (!tg_pt_gp->tg_pt_gp_valid_id)
3028 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3031 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3032 const char *page, size_t count)
3034 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3035 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3036 unsigned long tg_pt_gp_id;
3039 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3041 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3045 if (tg_pt_gp_id > 0x0000ffff) {
3046 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3051 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3055 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3056 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3057 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3058 tg_pt_gp->tg_pt_gp_id);
3063 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3066 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3068 ssize_t len = 0, cur_len;
3069 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3071 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3072 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3073 lun_tg_pt_gp_link) {
3074 struct se_portal_group *tpg = lun->lun_tpg;
3076 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3077 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3078 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3079 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3080 config_item_name(&lun->lun_group.cg_item));
3081 cur_len++; /* Extra byte for NULL terminator */
3083 if ((cur_len + len) > PAGE_SIZE) {
3084 pr_warn("Ran out of lu_gp_show_attr"
3085 "_members buffer\n");
3088 memcpy(page+len, buf, cur_len);
3091 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3096 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3097 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3098 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3099 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3100 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3101 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3102 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3103 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3104 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3105 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3106 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3107 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3108 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3109 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3110 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3111 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3112 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3114 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3115 &target_tg_pt_gp_attr_alua_access_state,
3116 &target_tg_pt_gp_attr_alua_access_status,
3117 &target_tg_pt_gp_attr_alua_access_type,
3118 &target_tg_pt_gp_attr_alua_support_transitioning,
3119 &target_tg_pt_gp_attr_alua_support_offline,
3120 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3121 &target_tg_pt_gp_attr_alua_support_unavailable,
3122 &target_tg_pt_gp_attr_alua_support_standby,
3123 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3124 &target_tg_pt_gp_attr_alua_support_active_optimized,
3125 &target_tg_pt_gp_attr_alua_write_metadata,
3126 &target_tg_pt_gp_attr_nonop_delay_msecs,
3127 &target_tg_pt_gp_attr_trans_delay_msecs,
3128 &target_tg_pt_gp_attr_implicit_trans_secs,
3129 &target_tg_pt_gp_attr_preferred,
3130 &target_tg_pt_gp_attr_tg_pt_gp_id,
3131 &target_tg_pt_gp_attr_members,
3135 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3137 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3138 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3140 core_alua_free_tg_pt_gp(tg_pt_gp);
3143 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3144 .release = target_core_alua_tg_pt_gp_release,
3147 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3148 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3149 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3150 .ct_owner = THIS_MODULE,
3153 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3155 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3157 static struct config_group *target_core_alua_create_tg_pt_gp(
3158 struct config_group *group,
3161 struct t10_alua *alua = container_of(group, struct t10_alua,
3162 alua_tg_pt_gps_group);
3163 struct t10_alua_tg_pt_gp *tg_pt_gp;
3164 struct config_group *alua_tg_pt_gp_cg = NULL;
3165 struct config_item *alua_tg_pt_gp_ci = NULL;
3167 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3171 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3172 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3174 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3175 &target_core_alua_tg_pt_gp_cit);
3177 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3178 " Group: alua/tg_pt_gps/%s\n",
3179 config_item_name(alua_tg_pt_gp_ci));
3181 return alua_tg_pt_gp_cg;
3184 static void target_core_alua_drop_tg_pt_gp(
3185 struct config_group *group,
3186 struct config_item *item)
3188 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3189 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3191 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3192 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3193 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3195 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3196 * -> target_core_alua_tg_pt_gp_release().
3198 config_item_put(item);
3201 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3202 .make_group = &target_core_alua_create_tg_pt_gp,
3203 .drop_item = &target_core_alua_drop_tg_pt_gp,
3206 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3208 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3210 /* Start functions for struct config_item_type target_core_alua_cit */
3213 * target_core_alua_cit is a ConfigFS group that lives under
3214 * /sys/kernel/config/target/core/alua. There are default groups
3215 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3216 * target_core_alua_cit in target_core_init_configfs() below.
3218 static const struct config_item_type target_core_alua_cit = {
3219 .ct_item_ops = NULL,
3221 .ct_owner = THIS_MODULE,
3224 /* End functions for struct config_item_type target_core_alua_cit */
3226 /* Start functions for struct config_item_type tb_dev_stat_cit */
3228 static struct config_group *target_core_stat_mkdir(
3229 struct config_group *group,
3232 return ERR_PTR(-ENOSYS);
3235 static void target_core_stat_rmdir(
3236 struct config_group *group,
3237 struct config_item *item)
3242 static struct configfs_group_operations target_core_stat_group_ops = {
3243 .make_group = &target_core_stat_mkdir,
3244 .drop_item = &target_core_stat_rmdir,
3247 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3249 /* End functions for struct config_item_type tb_dev_stat_cit */
3251 /* Start functions for struct config_item_type target_core_hba_cit */
3253 static struct config_group *target_core_make_subdev(
3254 struct config_group *group,
3257 struct t10_alua_tg_pt_gp *tg_pt_gp;
3258 struct config_item *hba_ci = &group->cg_item;
3259 struct se_hba *hba = item_to_hba(hba_ci);
3260 struct target_backend *tb = hba->backend;
3261 struct se_device *dev;
3262 int errno = -ENOMEM, ret;
3264 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3266 return ERR_PTR(ret);
3268 dev = target_alloc_device(hba, name);
3272 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3274 config_group_init_type_name(&dev->dev_action_group, "action",
3275 &tb->tb_dev_action_cit);
3276 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3278 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3279 &tb->tb_dev_attrib_cit);
3280 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3282 config_group_init_type_name(&dev->dev_pr_group, "pr",
3283 &tb->tb_dev_pr_cit);
3284 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3286 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3287 &tb->tb_dev_wwn_cit);
3288 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3291 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3292 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3293 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3296 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3297 "statistics", &tb->tb_dev_stat_cit);
3298 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3302 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3304 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3306 goto out_free_device;
3307 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3309 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3310 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3311 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3312 &dev->t10_alua.alua_tg_pt_gps_group);
3315 * Add core/$HBA/$DEV/statistics/ default groups
3317 target_stat_setup_dev_default_groups(dev);
3319 mutex_lock(&target_devices_lock);
3321 mutex_unlock(&target_devices_lock);
3323 mutex_unlock(&hba->hba_access_mutex);
3324 return &dev->dev_group;
3327 target_free_device(dev);
3329 mutex_unlock(&hba->hba_access_mutex);
3330 return ERR_PTR(errno);
3333 static void target_core_drop_subdev(
3334 struct config_group *group,
3335 struct config_item *item)
3337 struct config_group *dev_cg = to_config_group(item);
3338 struct se_device *dev =
3339 container_of(dev_cg, struct se_device, dev_group);
3342 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3344 mutex_lock(&hba->hba_access_mutex);
3346 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3347 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3350 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3351 * directly from target_core_alua_tg_pt_gp_release().
3353 dev->t10_alua.default_tg_pt_gp = NULL;
3355 configfs_remove_default_groups(dev_cg);
3358 * se_dev is released from target_core_dev_item_ops->release()
3360 config_item_put(item);
3362 mutex_lock(&target_devices_lock);
3364 mutex_unlock(&target_devices_lock);
3366 mutex_unlock(&hba->hba_access_mutex);
3369 static struct configfs_group_operations target_core_hba_group_ops = {
3370 .make_group = target_core_make_subdev,
3371 .drop_item = target_core_drop_subdev,
3375 static inline struct se_hba *to_hba(struct config_item *item)
3377 return container_of(to_config_group(item), struct se_hba, hba_group);
3380 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3382 struct se_hba *hba = to_hba(item);
3384 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3385 hba->hba_id, hba->backend->ops->name,
3386 TARGET_CORE_VERSION);
3389 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3391 struct se_hba *hba = to_hba(item);
3394 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3397 return sprintf(page, "%d\n", hba_mode);
3400 static ssize_t target_hba_mode_store(struct config_item *item,
3401 const char *page, size_t count)
3403 struct se_hba *hba = to_hba(item);
3404 unsigned long mode_flag;
3407 if (hba->backend->ops->pmode_enable_hba == NULL)
3410 ret = kstrtoul(page, 0, &mode_flag);
3412 pr_err("Unable to extract hba mode flag: %d\n", ret);
3416 if (hba->dev_count) {
3417 pr_err("Unable to set hba_mode with active devices\n");
3421 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3425 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3427 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3432 CONFIGFS_ATTR_RO(target_, hba_info);
3433 CONFIGFS_ATTR(target_, hba_mode);
3435 static void target_core_hba_release(struct config_item *item)
3437 struct se_hba *hba = container_of(to_config_group(item),
3438 struct se_hba, hba_group);
3439 core_delete_hba(hba);
3442 static struct configfs_attribute *target_core_hba_attrs[] = {
3443 &target_attr_hba_info,
3444 &target_attr_hba_mode,
3448 static struct configfs_item_operations target_core_hba_item_ops = {
3449 .release = target_core_hba_release,
3452 static const struct config_item_type target_core_hba_cit = {
3453 .ct_item_ops = &target_core_hba_item_ops,
3454 .ct_group_ops = &target_core_hba_group_ops,
3455 .ct_attrs = target_core_hba_attrs,
3456 .ct_owner = THIS_MODULE,
3459 static struct config_group *target_core_call_addhbatotarget(
3460 struct config_group *group,
3463 char *se_plugin_str, *str, *str2;
3465 char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3466 unsigned long plugin_dep_id = 0;
3469 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3470 pr_err("Passed *name strlen(): %d exceeds"
3471 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3472 TARGET_CORE_NAME_MAX_LEN);
3473 return ERR_PTR(-ENAMETOOLONG);
3475 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3477 str = strstr(buf, "_");
3479 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3480 return ERR_PTR(-EINVAL);
3482 se_plugin_str = buf;
3484 * Special case for subsystem plugins that have "_" in their names.
3485 * Namely rd_direct and rd_mcp..
3487 str2 = strstr(str+1, "_");
3489 *str2 = '\0'; /* Terminate for *se_plugin_str */
3490 str2++; /* Skip to start of plugin dependent ID */
3493 *str = '\0'; /* Terminate for *se_plugin_str */
3494 str++; /* Skip to start of plugin dependent ID */
3497 ret = kstrtoul(str, 0, &plugin_dep_id);
3499 pr_err("kstrtoul() returned %d for"
3500 " plugin_dep_id\n", ret);
3501 return ERR_PTR(ret);
3504 * Load up TCM subsystem plugins if they have not already been loaded.
3506 transport_subsystem_check_init();
3508 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3510 return ERR_CAST(hba);
3512 config_group_init_type_name(&hba->hba_group, name,
3513 &target_core_hba_cit);
3515 return &hba->hba_group;
3518 static void target_core_call_delhbafromtarget(
3519 struct config_group *group,
3520 struct config_item *item)
3523 * core_delete_hba() is called from target_core_hba_item_ops->release()
3524 * -> target_core_hba_release()
3526 config_item_put(item);
3529 static struct configfs_group_operations target_core_group_ops = {
3530 .make_group = target_core_call_addhbatotarget,
3531 .drop_item = target_core_call_delhbafromtarget,
3534 static const struct config_item_type target_core_cit = {
3535 .ct_item_ops = NULL,
3536 .ct_group_ops = &target_core_group_ops,
3538 .ct_owner = THIS_MODULE,
3541 /* Stop functions for struct config_item_type target_core_hba_cit */
3543 void target_setup_backend_cits(struct target_backend *tb)
3545 target_core_setup_dev_cit(tb);
3546 target_core_setup_dev_action_cit(tb);
3547 target_core_setup_dev_attrib_cit(tb);
3548 target_core_setup_dev_pr_cit(tb);
3549 target_core_setup_dev_wwn_cit(tb);
3550 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3551 target_core_setup_dev_stat_cit(tb);
3554 static void target_init_dbroot(void)
3558 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3559 fp = filp_open(db_root_stage, O_RDONLY, 0);
3561 pr_err("db_root: cannot open: %s\n", db_root_stage);
3564 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3565 filp_close(fp, NULL);
3566 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3569 filp_close(fp, NULL);
3571 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3572 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3575 static int __init target_core_init_configfs(void)
3577 struct configfs_subsystem *subsys = &target_core_fabrics;
3578 struct t10_alua_lu_gp *lu_gp;
3581 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3582 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3583 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3585 config_group_init(&subsys->su_group);
3586 mutex_init(&subsys->su_mutex);
3588 ret = init_se_kmem_caches();
3592 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3593 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3595 config_group_init_type_name(&target_core_hbagroup, "core",
3597 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3600 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3602 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3603 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3606 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3607 * groups under /sys/kernel/config/target/core/alua/
3609 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3610 &target_core_alua_lu_gps_cit);
3611 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3614 * Add core/alua/lu_gps/default_lu_gp
3616 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3617 if (IS_ERR(lu_gp)) {
3622 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3623 &target_core_alua_lu_gp_cit);
3624 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3626 default_lu_gp = lu_gp;
3629 * Register the target_core_mod subsystem with configfs.
3631 ret = configfs_register_subsystem(subsys);
3633 pr_err("Error %d while registering subsystem %s\n",
3634 ret, subsys->su_group.cg_item.ci_namebuf);
3637 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3638 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3639 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3641 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3643 ret = rd_module_init();
3647 ret = core_dev_setup_virtual_lun0();
3651 ret = target_xcopy_setup_pt();
3655 target_init_dbroot();
3660 configfs_unregister_subsystem(subsys);
3661 core_dev_release_virtual_lun0();
3664 if (default_lu_gp) {
3665 core_alua_free_lu_gp(default_lu_gp);
3666 default_lu_gp = NULL;
3668 release_se_kmem_caches();
3672 static void __exit target_core_exit_configfs(void)
3674 configfs_remove_default_groups(&alua_lu_gps_group);
3675 configfs_remove_default_groups(&alua_group);
3676 configfs_remove_default_groups(&target_core_hbagroup);
3679 * We expect subsys->su_group.default_groups to be released
3680 * by configfs subsystem provider logic..
3682 configfs_unregister_subsystem(&target_core_fabrics);
3684 core_alua_free_lu_gp(default_lu_gp);
3685 default_lu_gp = NULL;
3687 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3688 " Infrastructure\n");
3690 core_dev_release_virtual_lun0();
3692 target_xcopy_release_pt();
3693 release_se_kmem_caches();
3696 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3697 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3698 MODULE_LICENSE("GPL");
3700 module_init(target_core_init_configfs);
3701 module_exit(target_core_exit_configfs);