1 /*******************************************************************************
2 * Filename: target_core_configfs.c
4 * This file contains ConfigFS logic for the Generic Target Engine project.
6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
9 * Nicholas A. Bellinger <nab@kernel.org>
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <generated/utsrelease.h>
27 #include <linux/utsname.h>
28 #include <linux/init.h>
30 #include <linux/namei.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/delay.h>
34 #include <linux/unistd.h>
35 #include <linux/string.h>
36 #include <linux/parser.h>
37 #include <linux/syscalls.h>
38 #include <linux/configfs.h>
39 #include <linux/spinlock.h>
41 #include <target/target_core_base.h>
42 #include <target/target_core_backend.h>
43 #include <target/target_core_fabric.h>
44 #include <target/target_core_fabric_configfs.h>
45 #include <target/target_core_configfs.h>
46 #include <target/configfs_macros.h>
48 #include "target_core_internal.h"
49 #include "target_core_alua.h"
50 #include "target_core_pr.h"
51 #include "target_core_rd.h"
53 extern struct t10_alua_lu_gp *default_lu_gp;
55 static LIST_HEAD(g_tf_list);
56 static DEFINE_MUTEX(g_tf_lock);
58 struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
64 static struct config_group target_core_hbagroup;
65 static struct config_group alua_group;
66 static struct config_group alua_lu_gps_group;
68 static inline struct se_hba *
69 item_to_hba(struct config_item *item)
71 return container_of(to_config_group(item), struct se_hba, hba_group);
75 * Attributes for /sys/kernel/config/target/
77 static ssize_t target_core_attr_show(struct config_item *item,
78 struct configfs_attribute *attr,
81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
83 utsname()->sysname, utsname()->machine);
86 static struct configfs_item_operations target_core_fabric_item_ops = {
87 .show_attribute = target_core_attr_show,
90 static struct configfs_attribute target_core_item_attr_version = {
91 .ca_owner = THIS_MODULE,
96 static struct target_fabric_configfs *target_core_get_fabric(
99 struct target_fabric_configfs *tf;
104 mutex_lock(&g_tf_lock);
105 list_for_each_entry(tf, &g_tf_list, tf_list) {
106 if (!strcmp(tf->tf_name, name)) {
107 atomic_inc(&tf->tf_access_cnt);
108 mutex_unlock(&g_tf_lock);
112 mutex_unlock(&g_tf_lock);
118 * Called from struct target_core_group_ops->make_group()
120 static struct config_group *target_core_register_fabric(
121 struct config_group *group,
124 struct target_fabric_configfs *tf;
127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
128 " %s\n", group, name);
130 * Below are some hardcoded request_module() calls to automatically
131 * local fabric modules when the following is called:
133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
135 * Note that this does not limit which TCM fabric module can be
136 * registered, but simply provids auto loading logic for modules with
137 * mkdir(2) system calls with known TCM fabric modules.
139 if (!strncmp(name, "iscsi", 5)) {
141 * Automatically load the LIO Target fabric module when the
142 * following is called:
144 * mkdir -p $CONFIGFS/target/iscsi
146 ret = request_module("iscsi_target_mod");
148 pr_err("request_module() failed for"
149 " iscsi_target_mod.ko: %d\n", ret);
150 return ERR_PTR(-EINVAL);
152 } else if (!strncmp(name, "loopback", 8)) {
154 * Automatically load the tcm_loop fabric module when the
155 * following is called:
157 * mkdir -p $CONFIGFS/target/loopback
159 ret = request_module("tcm_loop");
161 pr_err("request_module() failed for"
162 " tcm_loop.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
167 tf = target_core_get_fabric(name);
169 pr_err("target_core_get_fabric() failed for %s\n",
171 return ERR_PTR(-EINVAL);
173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
174 " %s\n", tf->tf_name);
176 * On a successful target_core_get_fabric() look, the returned
177 * struct target_fabric_configfs *tf will contain a usage reference.
179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
180 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
182 tf->tf_group.default_groups = tf->tf_default_groups;
183 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
184 tf->tf_group.default_groups[1] = NULL;
186 config_group_init_type_name(&tf->tf_group, name,
187 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
189 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
192 " %s\n", tf->tf_group.cg_item.ci_name);
194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
196 tf->tf_ops.tf_subsys = tf->tf_subsys;
197 tf->tf_fabric = &tf->tf_group.cg_item;
198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
201 return &tf->tf_group;
205 * Called from struct target_core_group_ops->drop_item()
207 static void target_core_deregister_fabric(
208 struct config_group *group,
209 struct config_item *item)
211 struct target_fabric_configfs *tf = container_of(
212 to_config_group(item), struct target_fabric_configfs, tf_group);
213 struct config_group *tf_group;
214 struct config_item *df_item;
217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
218 " tf list\n", config_item_name(item));
220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
221 " %s\n", tf->tf_name);
222 atomic_dec(&tf->tf_access_cnt);
224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
225 " tf->tf_fabric for %s\n", tf->tf_name);
226 tf->tf_fabric = NULL;
228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
229 " %s\n", config_item_name(item));
231 tf_group = &tf->tf_group;
232 for (i = 0; tf_group->default_groups[i]; i++) {
233 df_item = &tf_group->default_groups[i]->cg_item;
234 tf_group->default_groups[i] = NULL;
235 config_item_put(df_item);
237 config_item_put(item);
240 static struct configfs_group_operations target_core_fabric_group_ops = {
241 .make_group = &target_core_register_fabric,
242 .drop_item = &target_core_deregister_fabric,
246 * All item attributes appearing in /sys/kernel/target/ appear here.
248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249 &target_core_item_attr_version,
254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
256 static struct config_item_type target_core_fabrics_item = {
257 .ct_item_ops = &target_core_fabric_item_ops,
258 .ct_group_ops = &target_core_fabric_group_ops,
259 .ct_attrs = target_core_fabric_item_attrs,
260 .ct_owner = THIS_MODULE,
263 static struct configfs_subsystem target_core_fabrics = {
266 .ci_namebuf = "target",
267 .ci_type = &target_core_fabrics_item,
272 static struct configfs_subsystem *target_core_subsystem[] = {
273 &target_core_fabrics,
277 /*##############################################################################
278 // Start functions called by external Target Fabrics Modules
279 //############################################################################*/
282 * First function called by fabric modules to:
284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285 * 2) Add struct target_fabric_configfs to g_tf_list
286 * 3) Return struct target_fabric_configfs to fabric module to be passed
287 * into target_fabric_configfs_register().
289 struct target_fabric_configfs *target_fabric_configfs_init(
290 struct module *fabric_mod,
293 struct target_fabric_configfs *tf;
296 pr_err("Unable to locate passed fabric name\n");
297 return ERR_PTR(-EINVAL);
299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
301 "_NAME_SIZE\n", name);
302 return ERR_PTR(-EINVAL);
305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
307 return ERR_PTR(-ENOMEM);
309 INIT_LIST_HEAD(&tf->tf_list);
310 atomic_set(&tf->tf_access_cnt, 0);
312 * Setup the default generic struct config_item_type's (cits) in
313 * struct target_fabric_configfs->tf_cit_tmpl
315 tf->tf_module = fabric_mod;
316 target_fabric_setup_cits(tf);
318 tf->tf_subsys = target_core_subsystem[0];
319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
321 mutex_lock(&g_tf_lock);
322 list_add_tail(&tf->tf_list, &g_tf_list);
323 mutex_unlock(&g_tf_lock);
325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
327 pr_debug("Initialized struct target_fabric_configfs: %p for"
328 " %s\n", tf, tf->tf_name);
331 EXPORT_SYMBOL(target_fabric_configfs_init);
334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
336 void target_fabric_configfs_free(
337 struct target_fabric_configfs *tf)
339 mutex_lock(&g_tf_lock);
340 list_del(&tf->tf_list);
341 mutex_unlock(&g_tf_lock);
345 EXPORT_SYMBOL(target_fabric_configfs_free);
348 * Perform a sanity check of the passed tf->tf_ops before completing
349 * TCM fabric module registration.
351 static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs *tf)
354 struct target_core_fabric_ops *tfo = &tf->tf_ops;
356 if (!tfo->get_fabric_name) {
357 pr_err("Missing tfo->get_fabric_name()\n");
360 if (!tfo->get_fabric_proto_ident) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
372 if (!tfo->tpg_get_default_depth) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
376 if (!tfo->tpg_get_pr_transport_id) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
380 if (!tfo->tpg_get_pr_transport_id_len) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
384 if (!tfo->tpg_check_demo_mode) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
388 if (!tfo->tpg_check_demo_mode_cache) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
392 if (!tfo->tpg_check_demo_mode_write_protect) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
396 if (!tfo->tpg_check_prod_mode_write_protect) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
400 if (!tfo->tpg_alloc_fabric_acl) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
404 if (!tfo->tpg_release_fabric_acl) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
408 if (!tfo->tpg_get_inst_index) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
412 if (!tfo->release_cmd) {
413 pr_err("Missing tfo->release_cmd()\n");
416 if (!tfo->shutdown_session) {
417 pr_err("Missing tfo->shutdown_session()\n");
420 if (!tfo->close_session) {
421 pr_err("Missing tfo->close_session()\n");
424 if (!tfo->stop_session) {
425 pr_err("Missing tfo->stop_session()\n");
428 if (!tfo->fall_back_to_erl0) {
429 pr_err("Missing tfo->fall_back_to_erl0()\n");
432 if (!tfo->sess_logged_in) {
433 pr_err("Missing tfo->sess_logged_in()\n");
436 if (!tfo->sess_get_index) {
437 pr_err("Missing tfo->sess_get_index()\n");
440 if (!tfo->write_pending) {
441 pr_err("Missing tfo->write_pending()\n");
444 if (!tfo->write_pending_status) {
445 pr_err("Missing tfo->write_pending_status()\n");
448 if (!tfo->set_default_node_attributes) {
449 pr_err("Missing tfo->set_default_node_attributes()\n");
452 if (!tfo->get_task_tag) {
453 pr_err("Missing tfo->get_task_tag()\n");
456 if (!tfo->get_cmd_state) {
457 pr_err("Missing tfo->get_cmd_state()\n");
460 if (!tfo->queue_data_in) {
461 pr_err("Missing tfo->queue_data_in()\n");
464 if (!tfo->queue_status) {
465 pr_err("Missing tfo->queue_status()\n");
468 if (!tfo->queue_tm_rsp) {
469 pr_err("Missing tfo->queue_tm_rsp()\n");
472 if (!tfo->set_fabric_sense_len) {
473 pr_err("Missing tfo->set_fabric_sense_len()\n");
476 if (!tfo->get_fabric_sense_len) {
477 pr_err("Missing tfo->get_fabric_sense_len()\n");
480 if (!tfo->is_state_remove) {
481 pr_err("Missing tfo->is_state_remove()\n");
485 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
486 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
487 * target_core_fabric_configfs.c WWN+TPG group context code.
489 if (!tfo->fabric_make_wwn) {
490 pr_err("Missing tfo->fabric_make_wwn()\n");
493 if (!tfo->fabric_drop_wwn) {
494 pr_err("Missing tfo->fabric_drop_wwn()\n");
497 if (!tfo->fabric_make_tpg) {
498 pr_err("Missing tfo->fabric_make_tpg()\n");
501 if (!tfo->fabric_drop_tpg) {
502 pr_err("Missing tfo->fabric_drop_tpg()\n");
510 * Called 2nd from fabric module with returned parameter of
511 * struct target_fabric_configfs * from target_fabric_configfs_init().
513 * Upon a successful registration, the new fabric's struct config_item is
514 * return. Also, a pointer to this struct is set in the passed
515 * struct target_fabric_configfs.
517 int target_fabric_configfs_register(
518 struct target_fabric_configfs *tf)
523 pr_err("Unable to locate target_fabric_configfs"
527 if (!tf->tf_subsys) {
528 pr_err("Unable to target struct config_subsystem"
532 ret = target_fabric_tf_ops_check(tf);
536 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
540 EXPORT_SYMBOL(target_fabric_configfs_register);
542 void target_fabric_configfs_deregister(
543 struct target_fabric_configfs *tf)
545 struct configfs_subsystem *su;
548 pr_err("Unable to locate passed target_fabric_"
554 pr_err("Unable to locate passed tf->tf_subsys"
558 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
560 mutex_lock(&g_tf_lock);
561 if (atomic_read(&tf->tf_access_cnt)) {
562 mutex_unlock(&g_tf_lock);
563 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
567 list_del(&tf->tf_list);
568 mutex_unlock(&g_tf_lock);
570 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
571 " %s\n", tf->tf_name);
572 tf->tf_module = NULL;
573 tf->tf_subsys = NULL;
576 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
579 EXPORT_SYMBOL(target_fabric_configfs_deregister);
581 /*##############################################################################
582 // Stop functions called by external Target Fabrics Modules
583 //############################################################################*/
585 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
587 #define DEF_DEV_ATTRIB_SHOW(_name) \
588 static ssize_t target_core_dev_show_attr_##_name( \
589 struct se_dev_attrib *da, \
592 struct se_device *dev; \
593 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
596 spin_lock(&se_dev->se_dev_lock); \
597 dev = se_dev->se_dev_ptr; \
599 spin_unlock(&se_dev->se_dev_lock); \
602 rb = snprintf(page, PAGE_SIZE, "%u\n", \
603 (u32)dev->se_sub_dev->se_dev_attrib._name); \
604 spin_unlock(&se_dev->se_dev_lock); \
609 #define DEF_DEV_ATTRIB_STORE(_name) \
610 static ssize_t target_core_dev_store_attr_##_name( \
611 struct se_dev_attrib *da, \
615 struct se_device *dev; \
616 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
620 spin_lock(&se_dev->se_dev_lock); \
621 dev = se_dev->se_dev_ptr; \
623 spin_unlock(&se_dev->se_dev_lock); \
626 ret = strict_strtoul(page, 0, &val); \
628 spin_unlock(&se_dev->se_dev_lock); \
629 pr_err("strict_strtoul() failed with" \
630 " ret: %d\n", ret); \
633 ret = se_dev_set_##_name(dev, (u32)val); \
634 spin_unlock(&se_dev->se_dev_lock); \
636 return (!ret) ? count : -EINVAL; \
639 #define DEF_DEV_ATTRIB(_name) \
640 DEF_DEV_ATTRIB_SHOW(_name); \
641 DEF_DEV_ATTRIB_STORE(_name);
643 #define DEF_DEV_ATTRIB_RO(_name) \
644 DEF_DEV_ATTRIB_SHOW(_name);
646 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
647 #define SE_DEV_ATTR(_name, _mode) \
648 static struct target_core_dev_attrib_attribute \
649 target_core_dev_attrib_##_name = \
650 __CONFIGFS_EATTR(_name, _mode, \
651 target_core_dev_show_attr_##_name, \
652 target_core_dev_store_attr_##_name);
654 #define SE_DEV_ATTR_RO(_name); \
655 static struct target_core_dev_attrib_attribute \
656 target_core_dev_attrib_##_name = \
657 __CONFIGFS_EATTR_RO(_name, \
658 target_core_dev_show_attr_##_name);
660 DEF_DEV_ATTRIB(emulate_dpo);
661 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
663 DEF_DEV_ATTRIB(emulate_fua_write);
664 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
666 DEF_DEV_ATTRIB(emulate_fua_read);
667 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
669 DEF_DEV_ATTRIB(emulate_write_cache);
670 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
672 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
673 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
675 DEF_DEV_ATTRIB(emulate_tas);
676 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
678 DEF_DEV_ATTRIB(emulate_tpu);
679 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
681 DEF_DEV_ATTRIB(emulate_tpws);
682 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
684 DEF_DEV_ATTRIB(enforce_pr_isids);
685 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
687 DEF_DEV_ATTRIB(is_nonrot);
688 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
690 DEF_DEV_ATTRIB(emulate_rest_reord);
691 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
693 DEF_DEV_ATTRIB_RO(hw_block_size);
694 SE_DEV_ATTR_RO(hw_block_size);
696 DEF_DEV_ATTRIB(block_size);
697 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
699 DEF_DEV_ATTRIB_RO(hw_max_sectors);
700 SE_DEV_ATTR_RO(hw_max_sectors);
702 DEF_DEV_ATTRIB(max_sectors);
703 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
705 DEF_DEV_ATTRIB(fabric_max_sectors);
706 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
708 DEF_DEV_ATTRIB(optimal_sectors);
709 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
711 DEF_DEV_ATTRIB_RO(hw_queue_depth);
712 SE_DEV_ATTR_RO(hw_queue_depth);
714 DEF_DEV_ATTRIB(queue_depth);
715 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
717 DEF_DEV_ATTRIB(max_unmap_lba_count);
718 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
720 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
721 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
723 DEF_DEV_ATTRIB(unmap_granularity);
724 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
726 DEF_DEV_ATTRIB(unmap_granularity_alignment);
727 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
729 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
731 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
732 &target_core_dev_attrib_emulate_dpo.attr,
733 &target_core_dev_attrib_emulate_fua_write.attr,
734 &target_core_dev_attrib_emulate_fua_read.attr,
735 &target_core_dev_attrib_emulate_write_cache.attr,
736 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
737 &target_core_dev_attrib_emulate_tas.attr,
738 &target_core_dev_attrib_emulate_tpu.attr,
739 &target_core_dev_attrib_emulate_tpws.attr,
740 &target_core_dev_attrib_enforce_pr_isids.attr,
741 &target_core_dev_attrib_is_nonrot.attr,
742 &target_core_dev_attrib_emulate_rest_reord.attr,
743 &target_core_dev_attrib_hw_block_size.attr,
744 &target_core_dev_attrib_block_size.attr,
745 &target_core_dev_attrib_hw_max_sectors.attr,
746 &target_core_dev_attrib_max_sectors.attr,
747 &target_core_dev_attrib_fabric_max_sectors.attr,
748 &target_core_dev_attrib_optimal_sectors.attr,
749 &target_core_dev_attrib_hw_queue_depth.attr,
750 &target_core_dev_attrib_queue_depth.attr,
751 &target_core_dev_attrib_max_unmap_lba_count.attr,
752 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
753 &target_core_dev_attrib_unmap_granularity.attr,
754 &target_core_dev_attrib_unmap_granularity_alignment.attr,
758 static struct configfs_item_operations target_core_dev_attrib_ops = {
759 .show_attribute = target_core_dev_attrib_attr_show,
760 .store_attribute = target_core_dev_attrib_attr_store,
763 static struct config_item_type target_core_dev_attrib_cit = {
764 .ct_item_ops = &target_core_dev_attrib_ops,
765 .ct_attrs = target_core_dev_attrib_attrs,
766 .ct_owner = THIS_MODULE,
769 /* End functions for struct config_item_type target_core_dev_attrib_cit */
771 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
773 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
774 #define SE_DEV_WWN_ATTR(_name, _mode) \
775 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
776 __CONFIGFS_EATTR(_name, _mode, \
777 target_core_dev_wwn_show_attr_##_name, \
778 target_core_dev_wwn_store_attr_##_name);
780 #define SE_DEV_WWN_ATTR_RO(_name); \
782 static struct target_core_dev_wwn_attribute \
783 target_core_dev_wwn_##_name = \
784 __CONFIGFS_EATTR_RO(_name, \
785 target_core_dev_wwn_show_attr_##_name); \
789 * VPD page 0x80 Unit serial
791 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
792 struct t10_wwn *t10_wwn,
795 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
796 struct se_device *dev;
798 dev = se_dev->se_dev_ptr;
802 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
803 &t10_wwn->unit_serial[0]);
806 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
807 struct t10_wwn *t10_wwn,
811 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
812 struct se_device *dev;
813 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
816 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
817 * from the struct scsi_device level firmware, do not allow
818 * VPD Unit Serial to be emulated.
820 * Note this struct scsi_device could also be emulating VPD
821 * information from its drivers/scsi LLD. But for now we assume
822 * it is doing 'the right thing' wrt a world wide unique
823 * VPD Unit Serial Number that OS dependent multipath can depend on.
825 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
826 pr_err("Underlying SCSI device firmware provided VPD"
827 " Unit Serial, ignoring request\n");
831 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
832 pr_err("Emulated VPD Unit Serial exceeds"
833 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
837 * Check to see if any active $FABRIC_MOD exports exist. If they
838 * do exist, fail here as changing this information on the fly
839 * (underneath the initiator side OS dependent multipath code)
840 * could cause negative effects.
842 dev = su_dev->se_dev_ptr;
844 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
845 pr_err("Unable to set VPD Unit Serial while"
846 " active %d $FABRIC_MOD exports exist\n",
847 atomic_read(&dev->dev_export_obj.obj_access_count));
852 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
854 * Also, strip any newline added from the userspace
855 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
857 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
858 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
859 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
860 "%s", strstrip(buf));
861 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
863 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
864 " %s\n", su_dev->t10_wwn.unit_serial);
869 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
872 * VPD page 0x83 Protocol Identifier
874 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
875 struct t10_wwn *t10_wwn,
878 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
879 struct se_device *dev;
881 unsigned char buf[VPD_TMP_BUF_SIZE];
884 dev = se_dev->se_dev_ptr;
888 memset(buf, 0, VPD_TMP_BUF_SIZE);
890 spin_lock(&t10_wwn->t10_vpd_lock);
891 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
892 if (!vpd->protocol_identifier_set)
895 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
897 if (len + strlen(buf) >= PAGE_SIZE)
900 len += sprintf(page+len, "%s", buf);
902 spin_unlock(&t10_wwn->t10_vpd_lock);
907 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
908 struct t10_wwn *t10_wwn,
915 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
918 * Generic wrapper for dumping VPD identifiers by association.
920 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
921 static ssize_t target_core_dev_wwn_show_attr_##_name( \
922 struct t10_wwn *t10_wwn, \
925 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
926 struct se_device *dev; \
927 struct t10_vpd *vpd; \
928 unsigned char buf[VPD_TMP_BUF_SIZE]; \
931 dev = se_dev->se_dev_ptr; \
935 spin_lock(&t10_wwn->t10_vpd_lock); \
936 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
937 if (vpd->association != _assoc) \
940 memset(buf, 0, VPD_TMP_BUF_SIZE); \
941 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
942 if (len + strlen(buf) >= PAGE_SIZE) \
944 len += sprintf(page+len, "%s", buf); \
946 memset(buf, 0, VPD_TMP_BUF_SIZE); \
947 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
948 if (len + strlen(buf) >= PAGE_SIZE) \
950 len += sprintf(page+len, "%s", buf); \
952 memset(buf, 0, VPD_TMP_BUF_SIZE); \
953 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
954 if (len + strlen(buf) >= PAGE_SIZE) \
956 len += sprintf(page+len, "%s", buf); \
958 spin_unlock(&t10_wwn->t10_vpd_lock); \
964 * VPD page 0x83 Association: Logical Unit
966 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
968 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
969 struct t10_wwn *t10_wwn,
976 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
979 * VPD page 0x83 Association: Target Port
981 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
983 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
984 struct t10_wwn *t10_wwn,
991 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
994 * VPD page 0x83 Association: SCSI Target Device
996 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
998 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
999 struct t10_wwn *t10_wwn,
1006 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1008 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1010 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1011 &target_core_dev_wwn_vpd_unit_serial.attr,
1012 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1013 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1014 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1015 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1019 static struct configfs_item_operations target_core_dev_wwn_ops = {
1020 .show_attribute = target_core_dev_wwn_attr_show,
1021 .store_attribute = target_core_dev_wwn_attr_store,
1024 static struct config_item_type target_core_dev_wwn_cit = {
1025 .ct_item_ops = &target_core_dev_wwn_ops,
1026 .ct_attrs = target_core_dev_wwn_attrs,
1027 .ct_owner = THIS_MODULE,
1030 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1032 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1034 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1035 #define SE_DEV_PR_ATTR(_name, _mode) \
1036 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1037 __CONFIGFS_EATTR(_name, _mode, \
1038 target_core_dev_pr_show_attr_##_name, \
1039 target_core_dev_pr_store_attr_##_name);
1041 #define SE_DEV_PR_ATTR_RO(_name); \
1042 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1043 __CONFIGFS_EATTR_RO(_name, \
1044 target_core_dev_pr_show_attr_##_name);
1049 static ssize_t target_core_dev_pr_show_spc3_res(
1050 struct se_device *dev,
1054 struct se_node_acl *se_nacl;
1055 struct t10_pr_registration *pr_reg;
1056 char i_buf[PR_REG_ISID_ID_LEN];
1059 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1061 spin_lock(&dev->dev_reservation_lock);
1062 pr_reg = dev->dev_pr_res_holder;
1064 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1065 spin_unlock(&dev->dev_reservation_lock);
1068 se_nacl = pr_reg->pr_reg_nacl;
1069 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1070 PR_REG_ISID_ID_LEN);
1072 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1073 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1074 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1075 spin_unlock(&dev->dev_reservation_lock);
1080 static ssize_t target_core_dev_pr_show_spc2_res(
1081 struct se_device *dev,
1085 struct se_node_acl *se_nacl;
1087 spin_lock(&dev->dev_reservation_lock);
1088 se_nacl = dev->dev_reserved_node_acl;
1090 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1091 spin_unlock(&dev->dev_reservation_lock);
1094 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1095 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1096 se_nacl->initiatorname);
1097 spin_unlock(&dev->dev_reservation_lock);
1102 static ssize_t target_core_dev_pr_show_attr_res_holder(
1103 struct se_subsystem_dev *su_dev,
1108 if (!su_dev->se_dev_ptr)
1111 switch (su_dev->t10_pr.res_type) {
1112 case SPC3_PERSISTENT_RESERVATIONS:
1113 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1116 case SPC2_RESERVATIONS:
1117 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1120 case SPC_PASSTHROUGH:
1121 len += sprintf(page+len, "Passthrough\n");
1124 len += sprintf(page+len, "Unknown\n");
1131 SE_DEV_PR_ATTR_RO(res_holder);
1134 * res_pr_all_tgt_pts
1136 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1137 struct se_subsystem_dev *su_dev,
1140 struct se_device *dev;
1141 struct t10_pr_registration *pr_reg;
1144 dev = su_dev->se_dev_ptr;
1148 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1151 spin_lock(&dev->dev_reservation_lock);
1152 pr_reg = dev->dev_pr_res_holder;
1154 len = sprintf(page, "No SPC-3 Reservation holder\n");
1155 spin_unlock(&dev->dev_reservation_lock);
1159 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1160 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1162 if (pr_reg->pr_reg_all_tg_pt)
1163 len = sprintf(page, "SPC-3 Reservation: All Target"
1164 " Ports registration\n");
1166 len = sprintf(page, "SPC-3 Reservation: Single"
1167 " Target Port registration\n");
1168 spin_unlock(&dev->dev_reservation_lock);
1173 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1178 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1179 struct se_subsystem_dev *su_dev,
1182 if (!su_dev->se_dev_ptr)
1185 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1188 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1191 SE_DEV_PR_ATTR_RO(res_pr_generation);
1194 * res_pr_holder_tg_port
1196 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1197 struct se_subsystem_dev *su_dev,
1200 struct se_device *dev;
1201 struct se_node_acl *se_nacl;
1203 struct se_portal_group *se_tpg;
1204 struct t10_pr_registration *pr_reg;
1205 struct target_core_fabric_ops *tfo;
1208 dev = su_dev->se_dev_ptr;
1212 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1215 spin_lock(&dev->dev_reservation_lock);
1216 pr_reg = dev->dev_pr_res_holder;
1218 len = sprintf(page, "No SPC-3 Reservation holder\n");
1219 spin_unlock(&dev->dev_reservation_lock);
1222 se_nacl = pr_reg->pr_reg_nacl;
1223 se_tpg = se_nacl->se_tpg;
1224 lun = pr_reg->pr_reg_tg_pt_lun;
1225 tfo = se_tpg->se_tpg_tfo;
1227 len += sprintf(page+len, "SPC-3 Reservation: %s"
1228 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1229 tfo->tpg_get_wwn(se_tpg));
1230 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1231 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1232 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1233 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1234 tfo->get_fabric_name(), lun->unpacked_lun);
1235 spin_unlock(&dev->dev_reservation_lock);
1240 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1243 * res_pr_registered_i_pts
1245 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1246 struct se_subsystem_dev *su_dev,
1249 struct target_core_fabric_ops *tfo;
1250 struct t10_pr_registration *pr_reg;
1251 unsigned char buf[384];
1252 char i_buf[PR_REG_ISID_ID_LEN];
1254 int reg_count = 0, prf_isid;
1256 if (!su_dev->se_dev_ptr)
1259 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1262 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1264 spin_lock(&su_dev->t10_pr.registration_lock);
1265 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1268 memset(buf, 0, 384);
1269 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1270 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1271 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1272 PR_REG_ISID_ID_LEN);
1273 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1274 tfo->get_fabric_name(),
1275 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1276 &i_buf[0] : "", pr_reg->pr_res_key,
1277 pr_reg->pr_res_generation);
1279 if (len + strlen(buf) >= PAGE_SIZE)
1282 len += sprintf(page+len, "%s", buf);
1285 spin_unlock(&su_dev->t10_pr.registration_lock);
1288 len += sprintf(page+len, "None\n");
1293 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1298 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1299 struct se_subsystem_dev *su_dev,
1302 struct se_device *dev;
1303 struct t10_pr_registration *pr_reg;
1306 dev = su_dev->se_dev_ptr;
1310 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1313 spin_lock(&dev->dev_reservation_lock);
1314 pr_reg = dev->dev_pr_res_holder;
1316 len = sprintf(page, "No SPC-3 Reservation holder\n");
1317 spin_unlock(&dev->dev_reservation_lock);
1320 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1321 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1322 spin_unlock(&dev->dev_reservation_lock);
1327 SE_DEV_PR_ATTR_RO(res_pr_type);
1332 static ssize_t target_core_dev_pr_show_attr_res_type(
1333 struct se_subsystem_dev *su_dev,
1338 if (!su_dev->se_dev_ptr)
1341 switch (su_dev->t10_pr.res_type) {
1342 case SPC3_PERSISTENT_RESERVATIONS:
1343 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1345 case SPC2_RESERVATIONS:
1346 len = sprintf(page, "SPC2_RESERVATIONS\n");
1348 case SPC_PASSTHROUGH:
1349 len = sprintf(page, "SPC_PASSTHROUGH\n");
1352 len = sprintf(page, "UNKNOWN\n");
1359 SE_DEV_PR_ATTR_RO(res_type);
1365 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1366 struct se_subsystem_dev *su_dev,
1369 if (!su_dev->se_dev_ptr)
1372 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1375 return sprintf(page, "APTPL Bit Status: %s\n",
1376 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1379 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1382 * res_aptpl_metadata
1384 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1385 struct se_subsystem_dev *su_dev,
1388 if (!su_dev->se_dev_ptr)
1391 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1394 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1398 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1399 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1400 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1401 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1404 static match_table_t tokens = {
1405 {Opt_initiator_fabric, "initiator_fabric=%s"},
1406 {Opt_initiator_node, "initiator_node=%s"},
1407 {Opt_initiator_sid, "initiator_sid=%s"},
1408 {Opt_sa_res_key, "sa_res_key=%s"},
1409 {Opt_res_holder, "res_holder=%d"},
1410 {Opt_res_type, "res_type=%d"},
1411 {Opt_res_scope, "res_scope=%d"},
1412 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1413 {Opt_mapped_lun, "mapped_lun=%d"},
1414 {Opt_target_fabric, "target_fabric=%s"},
1415 {Opt_target_node, "target_node=%s"},
1416 {Opt_tpgt, "tpgt=%d"},
1417 {Opt_port_rtpi, "port_rtpi=%d"},
1418 {Opt_target_lun, "target_lun=%d"},
1422 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1423 struct se_subsystem_dev *su_dev,
1427 struct se_device *dev;
1428 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1429 unsigned char *t_fabric = NULL, *t_port = NULL;
1430 char *orig, *ptr, *arg_p, *opts;
1431 substring_t args[MAX_OPT_ARGS];
1432 unsigned long long tmp_ll;
1434 u32 mapped_lun = 0, target_lun = 0;
1435 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1436 u16 port_rpti = 0, tpgt = 0;
1439 dev = su_dev->se_dev_ptr;
1443 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1446 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1447 pr_debug("Unable to process APTPL metadata while"
1448 " active fabric exports exist\n");
1452 opts = kstrdup(page, GFP_KERNEL);
1457 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1461 token = match_token(ptr, tokens, args);
1463 case Opt_initiator_fabric:
1464 i_fabric = match_strdup(&args[0]);
1470 case Opt_initiator_node:
1471 i_port = match_strdup(&args[0]);
1476 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1477 pr_err("APTPL metadata initiator_node="
1478 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1479 PR_APTPL_MAX_IPORT_LEN);
1484 case Opt_initiator_sid:
1485 isid = match_strdup(&args[0]);
1490 if (strlen(isid) >= PR_REG_ISID_LEN) {
1491 pr_err("APTPL metadata initiator_isid"
1492 "= exceeds PR_REG_ISID_LEN: %d\n",
1498 case Opt_sa_res_key:
1499 arg_p = match_strdup(&args[0]);
1504 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1506 pr_err("strict_strtoull() failed for"
1510 sa_res_key = (u64)tmp_ll;
1513 * PR APTPL Metadata for Reservation
1515 case Opt_res_holder:
1516 match_int(args, &arg);
1520 match_int(args, &arg);
1524 match_int(args, &arg);
1527 case Opt_res_all_tg_pt:
1528 match_int(args, &arg);
1529 all_tg_pt = (int)arg;
1531 case Opt_mapped_lun:
1532 match_int(args, &arg);
1533 mapped_lun = (u32)arg;
1536 * PR APTPL Metadata for Target Port
1538 case Opt_target_fabric:
1539 t_fabric = match_strdup(&args[0]);
1545 case Opt_target_node:
1546 t_port = match_strdup(&args[0]);
1551 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1552 pr_err("APTPL metadata target_node="
1553 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1554 PR_APTPL_MAX_TPORT_LEN);
1560 match_int(args, &arg);
1564 match_int(args, &arg);
1565 port_rpti = (u16)arg;
1567 case Opt_target_lun:
1568 match_int(args, &arg);
1569 target_lun = (u32)arg;
1576 if (!i_port || !t_port || !sa_res_key) {
1577 pr_err("Illegal parameters for APTPL registration\n");
1582 if (res_holder && !(type)) {
1583 pr_err("Illegal PR type: 0x%02x for reservation"
1589 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1590 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1591 res_holder, all_tg_pt, type);
1599 return (ret == 0) ? count : ret;
1602 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1604 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1606 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1607 &target_core_dev_pr_res_holder.attr,
1608 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1609 &target_core_dev_pr_res_pr_generation.attr,
1610 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1611 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1612 &target_core_dev_pr_res_pr_type.attr,
1613 &target_core_dev_pr_res_type.attr,
1614 &target_core_dev_pr_res_aptpl_active.attr,
1615 &target_core_dev_pr_res_aptpl_metadata.attr,
1619 static struct configfs_item_operations target_core_dev_pr_ops = {
1620 .show_attribute = target_core_dev_pr_attr_show,
1621 .store_attribute = target_core_dev_pr_attr_store,
1624 static struct config_item_type target_core_dev_pr_cit = {
1625 .ct_item_ops = &target_core_dev_pr_ops,
1626 .ct_attrs = target_core_dev_pr_attrs,
1627 .ct_owner = THIS_MODULE,
1630 /* End functions for struct config_item_type target_core_dev_pr_cit */
1632 /* Start functions for struct config_item_type target_core_dev_cit */
1634 static ssize_t target_core_show_dev_info(void *p, char *page)
1636 struct se_subsystem_dev *se_dev = p;
1637 struct se_hba *hba = se_dev->se_dev_hba;
1638 struct se_subsystem_api *t = hba->transport;
1640 ssize_t read_bytes = 0;
1642 if (!se_dev->se_dev_ptr)
1645 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1647 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1651 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1652 .attr = { .ca_owner = THIS_MODULE,
1654 .ca_mode = S_IRUGO },
1655 .show = target_core_show_dev_info,
1659 static ssize_t target_core_store_dev_control(
1664 struct se_subsystem_dev *se_dev = p;
1665 struct se_hba *hba = se_dev->se_dev_hba;
1666 struct se_subsystem_api *t = hba->transport;
1668 if (!se_dev->se_dev_su_ptr) {
1669 pr_err("Unable to locate struct se_subsystem_dev>se"
1674 return t->set_configfs_dev_params(hba, se_dev, page, count);
1677 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1678 .attr = { .ca_owner = THIS_MODULE,
1679 .ca_name = "control",
1680 .ca_mode = S_IWUSR },
1682 .store = target_core_store_dev_control,
1685 static ssize_t target_core_show_dev_alias(void *p, char *page)
1687 struct se_subsystem_dev *se_dev = p;
1689 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1692 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1695 static ssize_t target_core_store_dev_alias(
1700 struct se_subsystem_dev *se_dev = p;
1701 struct se_hba *hba = se_dev->se_dev_hba;
1704 if (count > (SE_DEV_ALIAS_LEN-1)) {
1705 pr_err("alias count: %d exceeds"
1706 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1707 SE_DEV_ALIAS_LEN-1);
1711 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1715 if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
1716 se_dev->se_dev_alias[read_bytes - 1] = '\0';
1718 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1720 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1721 config_item_name(&hba->hba_group.cg_item),
1722 config_item_name(&se_dev->se_dev_group.cg_item),
1723 se_dev->se_dev_alias);
1728 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1729 .attr = { .ca_owner = THIS_MODULE,
1731 .ca_mode = S_IRUGO | S_IWUSR },
1732 .show = target_core_show_dev_alias,
1733 .store = target_core_store_dev_alias,
1736 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1738 struct se_subsystem_dev *se_dev = p;
1740 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1743 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1746 static ssize_t target_core_store_dev_udev_path(
1751 struct se_subsystem_dev *se_dev = p;
1752 struct se_hba *hba = se_dev->se_dev_hba;
1755 if (count > (SE_UDEV_PATH_LEN-1)) {
1756 pr_err("udev_path count: %d exceeds"
1757 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1758 SE_UDEV_PATH_LEN-1);
1762 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1766 if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
1767 se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
1769 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1771 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1772 config_item_name(&hba->hba_group.cg_item),
1773 config_item_name(&se_dev->se_dev_group.cg_item),
1774 se_dev->se_dev_udev_path);
1779 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1780 .attr = { .ca_owner = THIS_MODULE,
1781 .ca_name = "udev_path",
1782 .ca_mode = S_IRUGO | S_IWUSR },
1783 .show = target_core_show_dev_udev_path,
1784 .store = target_core_store_dev_udev_path,
1787 static ssize_t target_core_store_dev_enable(
1792 struct se_subsystem_dev *se_dev = p;
1793 struct se_device *dev;
1794 struct se_hba *hba = se_dev->se_dev_hba;
1795 struct se_subsystem_api *t = hba->transport;
1798 ptr = strstr(page, "1");
1800 pr_err("For dev_enable ops, only valid value"
1804 if (se_dev->se_dev_ptr) {
1805 pr_err("se_dev->se_dev_ptr already set for storage"
1810 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1813 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1815 return PTR_ERR(dev);
1819 se_dev->se_dev_ptr = dev;
1820 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1821 " %p\n", se_dev->se_dev_ptr);
1826 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1827 .attr = { .ca_owner = THIS_MODULE,
1828 .ca_name = "enable",
1829 .ca_mode = S_IWUSR },
1831 .store = target_core_store_dev_enable,
1834 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1836 struct se_device *dev;
1837 struct se_subsystem_dev *su_dev = p;
1838 struct config_item *lu_ci;
1839 struct t10_alua_lu_gp *lu_gp;
1840 struct t10_alua_lu_gp_member *lu_gp_mem;
1843 dev = su_dev->se_dev_ptr;
1847 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1850 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1852 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1857 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1858 lu_gp = lu_gp_mem->lu_gp;
1860 lu_ci = &lu_gp->lu_gp_group.cg_item;
1861 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1862 config_item_name(lu_ci), lu_gp->lu_gp_id);
1864 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1869 static ssize_t target_core_store_alua_lu_gp(
1874 struct se_device *dev;
1875 struct se_subsystem_dev *su_dev = p;
1876 struct se_hba *hba = su_dev->se_dev_hba;
1877 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1878 struct t10_alua_lu_gp_member *lu_gp_mem;
1879 unsigned char buf[LU_GROUP_NAME_BUF];
1882 dev = su_dev->se_dev_ptr;
1886 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1887 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1888 config_item_name(&hba->hba_group.cg_item),
1889 config_item_name(&su_dev->se_dev_group.cg_item));
1892 if (count > LU_GROUP_NAME_BUF) {
1893 pr_err("ALUA LU Group Alias too large!\n");
1896 memset(buf, 0, LU_GROUP_NAME_BUF);
1897 memcpy(buf, page, count);
1899 * Any ALUA logical unit alias besides "NULL" means we will be
1900 * making a new group association.
1902 if (strcmp(strstrip(buf), "NULL")) {
1904 * core_alua_get_lu_gp_by_name() will increment reference to
1905 * struct t10_alua_lu_gp. This reference is released with
1906 * core_alua_get_lu_gp_by_name below().
1908 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1912 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1915 core_alua_put_lu_gp_from_name(lu_gp_new);
1916 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1921 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1922 lu_gp = lu_gp_mem->lu_gp;
1925 * Clearing an existing lu_gp association, and replacing
1929 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1930 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1932 config_item_name(&hba->hba_group.cg_item),
1933 config_item_name(&su_dev->se_dev_group.cg_item),
1934 config_item_name(&lu_gp->lu_gp_group.cg_item),
1937 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1938 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1943 * Removing existing association of lu_gp_mem with lu_gp
1945 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1949 * Associate lu_gp_mem with lu_gp_new.
1951 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1952 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1954 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1955 " core/alua/lu_gps/%s, ID: %hu\n",
1956 (move) ? "Moving" : "Adding",
1957 config_item_name(&hba->hba_group.cg_item),
1958 config_item_name(&su_dev->se_dev_group.cg_item),
1959 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1960 lu_gp_new->lu_gp_id);
1962 core_alua_put_lu_gp_from_name(lu_gp_new);
1966 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1967 .attr = { .ca_owner = THIS_MODULE,
1968 .ca_name = "alua_lu_gp",
1969 .ca_mode = S_IRUGO | S_IWUSR },
1970 .show = target_core_show_alua_lu_gp,
1971 .store = target_core_store_alua_lu_gp,
1974 static struct configfs_attribute *lio_core_dev_attrs[] = {
1975 &target_core_attr_dev_info.attr,
1976 &target_core_attr_dev_control.attr,
1977 &target_core_attr_dev_alias.attr,
1978 &target_core_attr_dev_udev_path.attr,
1979 &target_core_attr_dev_enable.attr,
1980 &target_core_attr_dev_alua_lu_gp.attr,
1984 static void target_core_dev_release(struct config_item *item)
1986 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1987 struct se_subsystem_dev, se_dev_group);
1988 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1989 struct se_subsystem_api *t = hba->transport;
1990 struct config_group *dev_cg = &se_dev->se_dev_group;
1992 kfree(dev_cg->default_groups);
1994 * This pointer will set when the storage is enabled with:
1995 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1997 if (se_dev->se_dev_ptr) {
1998 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1999 "virtual_device() for se_dev_ptr: %p\n",
2000 se_dev->se_dev_ptr);
2002 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2005 * Release struct se_subsystem_dev->se_dev_su_ptr..
2007 pr_debug("Target_Core_ConfigFS: Calling t->free_"
2008 "device() for se_dev_su_ptr: %p\n",
2009 se_dev->se_dev_su_ptr);
2011 t->free_device(se_dev->se_dev_su_ptr);
2014 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2015 "_dev_t: %p\n", se_dev);
2019 static ssize_t target_core_dev_show(struct config_item *item,
2020 struct configfs_attribute *attr,
2023 struct se_subsystem_dev *se_dev = container_of(
2024 to_config_group(item), struct se_subsystem_dev,
2026 struct target_core_configfs_attribute *tc_attr = container_of(
2027 attr, struct target_core_configfs_attribute, attr);
2032 return tc_attr->show(se_dev, page);
2035 static ssize_t target_core_dev_store(struct config_item *item,
2036 struct configfs_attribute *attr,
2037 const char *page, size_t count)
2039 struct se_subsystem_dev *se_dev = container_of(
2040 to_config_group(item), struct se_subsystem_dev,
2042 struct target_core_configfs_attribute *tc_attr = container_of(
2043 attr, struct target_core_configfs_attribute, attr);
2045 if (!tc_attr->store)
2048 return tc_attr->store(se_dev, page, count);
2051 static struct configfs_item_operations target_core_dev_item_ops = {
2052 .release = target_core_dev_release,
2053 .show_attribute = target_core_dev_show,
2054 .store_attribute = target_core_dev_store,
2057 static struct config_item_type target_core_dev_cit = {
2058 .ct_item_ops = &target_core_dev_item_ops,
2059 .ct_attrs = lio_core_dev_attrs,
2060 .ct_owner = THIS_MODULE,
2063 /* End functions for struct config_item_type target_core_dev_cit */
2065 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2067 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2068 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2069 static struct target_core_alua_lu_gp_attribute \
2070 target_core_alua_lu_gp_##_name = \
2071 __CONFIGFS_EATTR(_name, _mode, \
2072 target_core_alua_lu_gp_show_attr_##_name, \
2073 target_core_alua_lu_gp_store_attr_##_name);
2075 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2076 static struct target_core_alua_lu_gp_attribute \
2077 target_core_alua_lu_gp_##_name = \
2078 __CONFIGFS_EATTR_RO(_name, \
2079 target_core_alua_lu_gp_show_attr_##_name);
2084 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2085 struct t10_alua_lu_gp *lu_gp,
2088 if (!lu_gp->lu_gp_valid_id)
2091 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2094 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2095 struct t10_alua_lu_gp *lu_gp,
2099 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2100 unsigned long lu_gp_id;
2103 ret = strict_strtoul(page, 0, &lu_gp_id);
2105 pr_err("strict_strtoul() returned %d for"
2106 " lu_gp_id\n", ret);
2109 if (lu_gp_id > 0x0000ffff) {
2110 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2111 " 0x0000ffff\n", lu_gp_id);
2115 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2119 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2120 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2121 config_item_name(&alua_lu_gp_cg->cg_item),
2127 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2132 static ssize_t target_core_alua_lu_gp_show_attr_members(
2133 struct t10_alua_lu_gp *lu_gp,
2136 struct se_device *dev;
2138 struct se_subsystem_dev *su_dev;
2139 struct t10_alua_lu_gp_member *lu_gp_mem;
2140 ssize_t len = 0, cur_len;
2141 unsigned char buf[LU_GROUP_NAME_BUF];
2143 memset(buf, 0, LU_GROUP_NAME_BUF);
2145 spin_lock(&lu_gp->lu_gp_lock);
2146 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2147 dev = lu_gp_mem->lu_gp_mem_dev;
2148 su_dev = dev->se_sub_dev;
2149 hba = su_dev->se_dev_hba;
2151 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2152 config_item_name(&hba->hba_group.cg_item),
2153 config_item_name(&su_dev->se_dev_group.cg_item));
2154 cur_len++; /* Extra byte for NULL terminator */
2156 if ((cur_len + len) > PAGE_SIZE) {
2157 pr_warn("Ran out of lu_gp_show_attr"
2158 "_members buffer\n");
2161 memcpy(page+len, buf, cur_len);
2164 spin_unlock(&lu_gp->lu_gp_lock);
2169 SE_DEV_ALUA_LU_ATTR_RO(members);
2171 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2173 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2174 &target_core_alua_lu_gp_lu_gp_id.attr,
2175 &target_core_alua_lu_gp_members.attr,
2179 static void target_core_alua_lu_gp_release(struct config_item *item)
2181 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2182 struct t10_alua_lu_gp, lu_gp_group);
2184 core_alua_free_lu_gp(lu_gp);
2187 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2188 .release = target_core_alua_lu_gp_release,
2189 .show_attribute = target_core_alua_lu_gp_attr_show,
2190 .store_attribute = target_core_alua_lu_gp_attr_store,
2193 static struct config_item_type target_core_alua_lu_gp_cit = {
2194 .ct_item_ops = &target_core_alua_lu_gp_ops,
2195 .ct_attrs = target_core_alua_lu_gp_attrs,
2196 .ct_owner = THIS_MODULE,
2199 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2201 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2203 static struct config_group *target_core_alua_create_lu_gp(
2204 struct config_group *group,
2207 struct t10_alua_lu_gp *lu_gp;
2208 struct config_group *alua_lu_gp_cg = NULL;
2209 struct config_item *alua_lu_gp_ci = NULL;
2211 lu_gp = core_alua_allocate_lu_gp(name, 0);
2215 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2216 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2218 config_group_init_type_name(alua_lu_gp_cg, name,
2219 &target_core_alua_lu_gp_cit);
2221 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2222 " Group: core/alua/lu_gps/%s\n",
2223 config_item_name(alua_lu_gp_ci));
2225 return alua_lu_gp_cg;
2229 static void target_core_alua_drop_lu_gp(
2230 struct config_group *group,
2231 struct config_item *item)
2233 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2234 struct t10_alua_lu_gp, lu_gp_group);
2236 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2237 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2238 config_item_name(item), lu_gp->lu_gp_id);
2240 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2241 * -> target_core_alua_lu_gp_release()
2243 config_item_put(item);
2246 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2247 .make_group = &target_core_alua_create_lu_gp,
2248 .drop_item = &target_core_alua_drop_lu_gp,
2251 static struct config_item_type target_core_alua_lu_gps_cit = {
2252 .ct_item_ops = NULL,
2253 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2254 .ct_owner = THIS_MODULE,
2257 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2259 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2261 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2262 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2263 static struct target_core_alua_tg_pt_gp_attribute \
2264 target_core_alua_tg_pt_gp_##_name = \
2265 __CONFIGFS_EATTR(_name, _mode, \
2266 target_core_alua_tg_pt_gp_show_attr_##_name, \
2267 target_core_alua_tg_pt_gp_store_attr_##_name);
2269 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2270 static struct target_core_alua_tg_pt_gp_attribute \
2271 target_core_alua_tg_pt_gp_##_name = \
2272 __CONFIGFS_EATTR_RO(_name, \
2273 target_core_alua_tg_pt_gp_show_attr_##_name);
2278 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2279 struct t10_alua_tg_pt_gp *tg_pt_gp,
2282 return sprintf(page, "%d\n",
2283 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2286 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2287 struct t10_alua_tg_pt_gp *tg_pt_gp,
2291 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2295 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2296 pr_err("Unable to do implict ALUA on non valid"
2297 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2301 ret = strict_strtoul(page, 0, &tmp);
2303 pr_err("Unable to extract new ALUA access state from"
2307 new_state = (int)tmp;
2309 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2310 pr_err("Unable to process implict configfs ALUA"
2311 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2315 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2316 NULL, NULL, new_state, 0);
2317 return (!ret) ? count : -EINVAL;
2320 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2323 * alua_access_status
2325 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2326 struct t10_alua_tg_pt_gp *tg_pt_gp,
2329 return sprintf(page, "%s\n",
2330 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2333 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2334 struct t10_alua_tg_pt_gp *tg_pt_gp,
2339 int new_status, ret;
2341 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2342 pr_err("Unable to do set ALUA access status on non"
2343 " valid tg_pt_gp ID: %hu\n",
2344 tg_pt_gp->tg_pt_gp_valid_id);
2348 ret = strict_strtoul(page, 0, &tmp);
2350 pr_err("Unable to extract new ALUA access status"
2351 " from %s\n", page);
2354 new_status = (int)tmp;
2356 if ((new_status != ALUA_STATUS_NONE) &&
2357 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2358 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2359 pr_err("Illegal ALUA access status: 0x%02x\n",
2364 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2368 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2373 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2374 struct t10_alua_tg_pt_gp *tg_pt_gp,
2377 return core_alua_show_access_type(tg_pt_gp, page);
2380 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2381 struct t10_alua_tg_pt_gp *tg_pt_gp,
2385 return core_alua_store_access_type(tg_pt_gp, page, count);
2388 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2391 * alua_write_metadata
2393 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2394 struct t10_alua_tg_pt_gp *tg_pt_gp,
2397 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2400 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2401 struct t10_alua_tg_pt_gp *tg_pt_gp,
2408 ret = strict_strtoul(page, 0, &tmp);
2410 pr_err("Unable to extract alua_write_metadata\n");
2414 if ((tmp != 0) && (tmp != 1)) {
2415 pr_err("Illegal value for alua_write_metadata:"
2419 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2424 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2431 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2432 struct t10_alua_tg_pt_gp *tg_pt_gp,
2435 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2439 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2440 struct t10_alua_tg_pt_gp *tg_pt_gp,
2444 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2447 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2452 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2453 struct t10_alua_tg_pt_gp *tg_pt_gp,
2456 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2459 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2460 struct t10_alua_tg_pt_gp *tg_pt_gp,
2464 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2467 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2473 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2474 struct t10_alua_tg_pt_gp *tg_pt_gp,
2477 return core_alua_show_preferred_bit(tg_pt_gp, page);
2480 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2481 struct t10_alua_tg_pt_gp *tg_pt_gp,
2485 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2488 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2493 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2494 struct t10_alua_tg_pt_gp *tg_pt_gp,
2497 if (!tg_pt_gp->tg_pt_gp_valid_id)
2500 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2503 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2504 struct t10_alua_tg_pt_gp *tg_pt_gp,
2508 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2509 unsigned long tg_pt_gp_id;
2512 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2514 pr_err("strict_strtoul() returned %d for"
2515 " tg_pt_gp_id\n", ret);
2518 if (tg_pt_gp_id > 0x0000ffff) {
2519 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2520 " 0x0000ffff\n", tg_pt_gp_id);
2524 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2528 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2529 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2530 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2531 tg_pt_gp->tg_pt_gp_id);
2536 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2541 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2542 struct t10_alua_tg_pt_gp *tg_pt_gp,
2545 struct se_port *port;
2546 struct se_portal_group *tpg;
2548 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2549 ssize_t len = 0, cur_len;
2550 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2552 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2554 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2555 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2556 tg_pt_gp_mem_list) {
2557 port = tg_pt_gp_mem->tg_pt;
2558 tpg = port->sep_tpg;
2559 lun = port->sep_lun;
2561 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2562 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2563 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2564 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2565 config_item_name(&lun->lun_group.cg_item));
2566 cur_len++; /* Extra byte for NULL terminator */
2568 if ((cur_len + len) > PAGE_SIZE) {
2569 pr_warn("Ran out of lu_gp_show_attr"
2570 "_members buffer\n");
2573 memcpy(page+len, buf, cur_len);
2576 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2581 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2583 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2586 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2587 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2588 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2589 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2590 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2591 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2592 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2593 &target_core_alua_tg_pt_gp_preferred.attr,
2594 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2595 &target_core_alua_tg_pt_gp_members.attr,
2599 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2601 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2602 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2604 core_alua_free_tg_pt_gp(tg_pt_gp);
2607 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2608 .release = target_core_alua_tg_pt_gp_release,
2609 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2610 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2613 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2614 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2615 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2616 .ct_owner = THIS_MODULE,
2619 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2621 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2623 static struct config_group *target_core_alua_create_tg_pt_gp(
2624 struct config_group *group,
2627 struct t10_alua *alua = container_of(group, struct t10_alua,
2628 alua_tg_pt_gps_group);
2629 struct t10_alua_tg_pt_gp *tg_pt_gp;
2630 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2631 struct config_group *alua_tg_pt_gp_cg = NULL;
2632 struct config_item *alua_tg_pt_gp_ci = NULL;
2634 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2638 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2639 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2641 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2642 &target_core_alua_tg_pt_gp_cit);
2644 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2645 " Group: alua/tg_pt_gps/%s\n",
2646 config_item_name(alua_tg_pt_gp_ci));
2648 return alua_tg_pt_gp_cg;
2651 static void target_core_alua_drop_tg_pt_gp(
2652 struct config_group *group,
2653 struct config_item *item)
2655 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2656 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2658 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2659 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2660 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2662 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2663 * -> target_core_alua_tg_pt_gp_release().
2665 config_item_put(item);
2668 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2669 .make_group = &target_core_alua_create_tg_pt_gp,
2670 .drop_item = &target_core_alua_drop_tg_pt_gp,
2673 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2674 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2675 .ct_owner = THIS_MODULE,
2678 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2680 /* Start functions for struct config_item_type target_core_alua_cit */
2683 * target_core_alua_cit is a ConfigFS group that lives under
2684 * /sys/kernel/config/target/core/alua. There are default groups
2685 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2686 * target_core_alua_cit in target_core_init_configfs() below.
2688 static struct config_item_type target_core_alua_cit = {
2689 .ct_item_ops = NULL,
2691 .ct_owner = THIS_MODULE,
2694 /* End functions for struct config_item_type target_core_alua_cit */
2696 /* Start functions for struct config_item_type target_core_stat_cit */
2698 static struct config_group *target_core_stat_mkdir(
2699 struct config_group *group,
2702 return ERR_PTR(-ENOSYS);
2705 static void target_core_stat_rmdir(
2706 struct config_group *group,
2707 struct config_item *item)
2712 static struct configfs_group_operations target_core_stat_group_ops = {
2713 .make_group = &target_core_stat_mkdir,
2714 .drop_item = &target_core_stat_rmdir,
2717 static struct config_item_type target_core_stat_cit = {
2718 .ct_group_ops = &target_core_stat_group_ops,
2719 .ct_owner = THIS_MODULE,
2722 /* End functions for struct config_item_type target_core_stat_cit */
2724 /* Start functions for struct config_item_type target_core_hba_cit */
2726 static struct config_group *target_core_make_subdev(
2727 struct config_group *group,
2730 struct t10_alua_tg_pt_gp *tg_pt_gp;
2731 struct se_subsystem_dev *se_dev;
2732 struct se_subsystem_api *t;
2733 struct config_item *hba_ci = &group->cg_item;
2734 struct se_hba *hba = item_to_hba(hba_ci);
2735 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2736 struct config_group *dev_stat_grp = NULL;
2737 int errno = -ENOMEM, ret;
2739 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2741 return ERR_PTR(ret);
2743 * Locate the struct se_subsystem_api from parent's struct se_hba.
2747 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2749 pr_err("Unable to allocate memory for"
2750 " struct se_subsystem_dev\n");
2753 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2754 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2755 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2756 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2757 spin_lock_init(&se_dev->t10_pr.registration_lock);
2758 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2759 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2760 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2761 spin_lock_init(&se_dev->se_dev_lock);
2762 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2763 se_dev->t10_wwn.t10_sub_dev = se_dev;
2764 se_dev->t10_alua.t10_sub_dev = se_dev;
2765 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2767 se_dev->se_dev_hba = hba;
2768 dev_cg = &se_dev->se_dev_group;
2770 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2772 if (!dev_cg->default_groups)
2775 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2776 * for ->allocate_virtdevice()
2778 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2779 * has been called successfully in the next level up in the
2780 * configfs tree for device object's struct config_group.
2782 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2783 if (!se_dev->se_dev_su_ptr) {
2784 pr_err("Unable to locate subsystem dependent pointer"
2785 " from allocate_virtdevice()\n");
2789 config_group_init_type_name(&se_dev->se_dev_group, name,
2790 &target_core_dev_cit);
2791 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2792 &target_core_dev_attrib_cit);
2793 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2794 &target_core_dev_pr_cit);
2795 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2796 &target_core_dev_wwn_cit);
2797 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2798 "alua", &target_core_alua_tg_pt_gps_cit);
2799 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2800 "statistics", &target_core_stat_cit);
2802 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2803 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2804 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2805 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2806 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2807 dev_cg->default_groups[5] = NULL;
2809 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2811 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2815 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2816 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2818 if (!tg_pt_gp_cg->default_groups) {
2819 pr_err("Unable to allocate tg_pt_gp_cg->"
2820 "default_groups\n");
2824 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2825 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2826 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2827 tg_pt_gp_cg->default_groups[1] = NULL;
2828 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2830 * Add core/$HBA/$DEV/statistics/ default groups
2832 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2833 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2835 if (!dev_stat_grp->default_groups) {
2836 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2839 target_stat_setup_dev_default_groups(se_dev);
2841 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2842 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2844 mutex_unlock(&hba->hba_access_mutex);
2845 return &se_dev->se_dev_group;
2847 if (se_dev->t10_alua.default_tg_pt_gp) {
2848 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2849 se_dev->t10_alua.default_tg_pt_gp = NULL;
2852 kfree(dev_stat_grp->default_groups);
2854 kfree(tg_pt_gp_cg->default_groups);
2856 kfree(dev_cg->default_groups);
2857 if (se_dev->se_dev_su_ptr)
2858 t->free_device(se_dev->se_dev_su_ptr);
2861 mutex_unlock(&hba->hba_access_mutex);
2862 return ERR_PTR(errno);
2865 static void target_core_drop_subdev(
2866 struct config_group *group,
2867 struct config_item *item)
2869 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2870 struct se_subsystem_dev, se_dev_group);
2872 struct se_subsystem_api *t;
2873 struct config_item *df_item;
2874 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2877 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2879 mutex_lock(&hba->hba_access_mutex);
2882 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2883 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2884 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2885 dev_stat_grp->default_groups[i] = NULL;
2886 config_item_put(df_item);
2888 kfree(dev_stat_grp->default_groups);
2890 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2891 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2892 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2893 tg_pt_gp_cg->default_groups[i] = NULL;
2894 config_item_put(df_item);
2896 kfree(tg_pt_gp_cg->default_groups);
2898 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2899 * directly from target_core_alua_tg_pt_gp_release().
2901 se_dev->t10_alua.default_tg_pt_gp = NULL;
2903 dev_cg = &se_dev->se_dev_group;
2904 for (i = 0; dev_cg->default_groups[i]; i++) {
2905 df_item = &dev_cg->default_groups[i]->cg_item;
2906 dev_cg->default_groups[i] = NULL;
2907 config_item_put(df_item);
2910 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2911 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2913 config_item_put(item);
2914 mutex_unlock(&hba->hba_access_mutex);
2917 static struct configfs_group_operations target_core_hba_group_ops = {
2918 .make_group = target_core_make_subdev,
2919 .drop_item = target_core_drop_subdev,
2922 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2923 #define SE_HBA_ATTR(_name, _mode) \
2924 static struct target_core_hba_attribute \
2925 target_core_hba_##_name = \
2926 __CONFIGFS_EATTR(_name, _mode, \
2927 target_core_hba_show_attr_##_name, \
2928 target_core_hba_store_attr_##_name);
2930 #define SE_HBA_ATTR_RO(_name) \
2931 static struct target_core_hba_attribute \
2932 target_core_hba_##_name = \
2933 __CONFIGFS_EATTR_RO(_name, \
2934 target_core_hba_show_attr_##_name);
2936 static ssize_t target_core_hba_show_attr_hba_info(
2940 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2941 hba->hba_id, hba->transport->name,
2942 TARGET_CORE_CONFIGFS_VERSION);
2945 SE_HBA_ATTR_RO(hba_info);
2947 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2952 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2955 return sprintf(page, "%d\n", hba_mode);
2958 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2959 const char *page, size_t count)
2961 struct se_subsystem_api *transport = hba->transport;
2962 unsigned long mode_flag;
2965 if (transport->pmode_enable_hba == NULL)
2968 ret = strict_strtoul(page, 0, &mode_flag);
2970 pr_err("Unable to extract hba mode flag: %d\n", ret);
2974 spin_lock(&hba->device_lock);
2975 if (!list_empty(&hba->hba_dev_list)) {
2976 pr_err("Unable to set hba_mode with active devices\n");
2977 spin_unlock(&hba->device_lock);
2980 spin_unlock(&hba->device_lock);
2982 ret = transport->pmode_enable_hba(hba, mode_flag);
2986 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2988 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2993 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2995 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2997 static void target_core_hba_release(struct config_item *item)
2999 struct se_hba *hba = container_of(to_config_group(item),
3000 struct se_hba, hba_group);
3001 core_delete_hba(hba);
3004 static struct configfs_attribute *target_core_hba_attrs[] = {
3005 &target_core_hba_hba_info.attr,
3006 &target_core_hba_hba_mode.attr,
3010 static struct configfs_item_operations target_core_hba_item_ops = {
3011 .release = target_core_hba_release,
3012 .show_attribute = target_core_hba_attr_show,
3013 .store_attribute = target_core_hba_attr_store,
3016 static struct config_item_type target_core_hba_cit = {
3017 .ct_item_ops = &target_core_hba_item_ops,
3018 .ct_group_ops = &target_core_hba_group_ops,
3019 .ct_attrs = target_core_hba_attrs,
3020 .ct_owner = THIS_MODULE,
3023 static struct config_group *target_core_call_addhbatotarget(
3024 struct config_group *group,
3027 char *se_plugin_str, *str, *str2;
3029 char buf[TARGET_CORE_NAME_MAX_LEN];
3030 unsigned long plugin_dep_id = 0;
3033 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3034 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3035 pr_err("Passed *name strlen(): %d exceeds"
3036 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3037 TARGET_CORE_NAME_MAX_LEN);
3038 return ERR_PTR(-ENAMETOOLONG);
3040 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3042 str = strstr(buf, "_");
3044 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3045 return ERR_PTR(-EINVAL);
3047 se_plugin_str = buf;
3049 * Special case for subsystem plugins that have "_" in their names.
3050 * Namely rd_direct and rd_mcp..
3052 str2 = strstr(str+1, "_");
3054 *str2 = '\0'; /* Terminate for *se_plugin_str */
3055 str2++; /* Skip to start of plugin dependent ID */
3058 *str = '\0'; /* Terminate for *se_plugin_str */
3059 str++; /* Skip to start of plugin dependent ID */
3062 ret = strict_strtoul(str, 0, &plugin_dep_id);
3064 pr_err("strict_strtoul() returned %d for"
3065 " plugin_dep_id\n", ret);
3066 return ERR_PTR(-EINVAL);
3069 * Load up TCM subsystem plugins if they have not already been loaded.
3071 transport_subsystem_check_init();
3073 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3075 return ERR_CAST(hba);
3077 config_group_init_type_name(&hba->hba_group, name,
3078 &target_core_hba_cit);
3080 return &hba->hba_group;
3083 static void target_core_call_delhbafromtarget(
3084 struct config_group *group,
3085 struct config_item *item)
3088 * core_delete_hba() is called from target_core_hba_item_ops->release()
3089 * -> target_core_hba_release()
3091 config_item_put(item);
3094 static struct configfs_group_operations target_core_group_ops = {
3095 .make_group = target_core_call_addhbatotarget,
3096 .drop_item = target_core_call_delhbafromtarget,
3099 static struct config_item_type target_core_cit = {
3100 .ct_item_ops = NULL,
3101 .ct_group_ops = &target_core_group_ops,
3103 .ct_owner = THIS_MODULE,
3106 /* Stop functions for struct config_item_type target_core_hba_cit */
3108 static int __init target_core_init_configfs(void)
3110 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3111 struct config_group *lu_gp_cg = NULL;
3112 struct configfs_subsystem *subsys;
3113 struct t10_alua_lu_gp *lu_gp;
3116 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3117 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3118 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3120 subsys = target_core_subsystem[0];
3121 config_group_init(&subsys->su_group);
3122 mutex_init(&subsys->su_mutex);
3124 ret = init_se_kmem_caches();
3128 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3129 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3131 target_cg = &subsys->su_group;
3132 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3134 if (!target_cg->default_groups) {
3135 pr_err("Unable to allocate target_cg->default_groups\n");
3139 config_group_init_type_name(&target_core_hbagroup,
3140 "core", &target_core_cit);
3141 target_cg->default_groups[0] = &target_core_hbagroup;
3142 target_cg->default_groups[1] = NULL;
3144 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3146 hba_cg = &target_core_hbagroup;
3147 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3149 if (!hba_cg->default_groups) {
3150 pr_err("Unable to allocate hba_cg->default_groups\n");
3153 config_group_init_type_name(&alua_group,
3154 "alua", &target_core_alua_cit);
3155 hba_cg->default_groups[0] = &alua_group;
3156 hba_cg->default_groups[1] = NULL;
3158 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3159 * groups under /sys/kernel/config/target/core/alua/
3161 alua_cg = &alua_group;
3162 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3164 if (!alua_cg->default_groups) {
3165 pr_err("Unable to allocate alua_cg->default_groups\n");
3169 config_group_init_type_name(&alua_lu_gps_group,
3170 "lu_gps", &target_core_alua_lu_gps_cit);
3171 alua_cg->default_groups[0] = &alua_lu_gps_group;
3172 alua_cg->default_groups[1] = NULL;
3174 * Add core/alua/lu_gps/default_lu_gp
3176 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3180 lu_gp_cg = &alua_lu_gps_group;
3181 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3183 if (!lu_gp_cg->default_groups) {
3184 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3188 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3189 &target_core_alua_lu_gp_cit);
3190 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3191 lu_gp_cg->default_groups[1] = NULL;
3192 default_lu_gp = lu_gp;
3194 * Register the target_core_mod subsystem with configfs.
3196 ret = configfs_register_subsystem(subsys);
3198 pr_err("Error %d while registering subsystem %s\n",
3199 ret, subsys->su_group.cg_item.ci_namebuf);
3202 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3203 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3204 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3206 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3208 ret = rd_module_init();
3212 if (core_dev_setup_virtual_lun0() < 0)
3218 configfs_unregister_subsystem(subsys);
3219 core_dev_release_virtual_lun0();
3222 if (default_lu_gp) {
3223 core_alua_free_lu_gp(default_lu_gp);
3224 default_lu_gp = NULL;
3227 kfree(lu_gp_cg->default_groups);
3229 kfree(alua_cg->default_groups);
3231 kfree(hba_cg->default_groups);
3232 kfree(target_cg->default_groups);
3233 release_se_kmem_caches();
3237 static void __exit target_core_exit_configfs(void)
3239 struct configfs_subsystem *subsys;
3240 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3241 struct config_item *item;
3244 subsys = target_core_subsystem[0];
3246 lu_gp_cg = &alua_lu_gps_group;
3247 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3248 item = &lu_gp_cg->default_groups[i]->cg_item;
3249 lu_gp_cg->default_groups[i] = NULL;
3250 config_item_put(item);
3252 kfree(lu_gp_cg->default_groups);
3253 lu_gp_cg->default_groups = NULL;
3255 alua_cg = &alua_group;
3256 for (i = 0; alua_cg->default_groups[i]; i++) {
3257 item = &alua_cg->default_groups[i]->cg_item;
3258 alua_cg->default_groups[i] = NULL;
3259 config_item_put(item);
3261 kfree(alua_cg->default_groups);
3262 alua_cg->default_groups = NULL;
3264 hba_cg = &target_core_hbagroup;
3265 for (i = 0; hba_cg->default_groups[i]; i++) {
3266 item = &hba_cg->default_groups[i]->cg_item;
3267 hba_cg->default_groups[i] = NULL;
3268 config_item_put(item);
3270 kfree(hba_cg->default_groups);
3271 hba_cg->default_groups = NULL;
3273 * We expect subsys->su_group.default_groups to be released
3274 * by configfs subsystem provider logic..
3276 configfs_unregister_subsystem(subsys);
3277 kfree(subsys->su_group.default_groups);
3279 core_alua_free_lu_gp(default_lu_gp);
3280 default_lu_gp = NULL;
3282 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3283 " Infrastructure\n");
3285 core_dev_release_virtual_lun0();
3287 release_se_kmem_caches();
3290 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3291 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3292 MODULE_LICENSE("GPL");
3294 module_init(target_core_init_configfs);
3295 module_exit(target_core_exit_configfs);