1 /*******************************************************************************
2 * Filename: target_core_configfs.c
4 * This file contains ConfigFS logic for the Generic Target Engine project.
6 * (c) Copyright 2008-2012 RisingTide Systems LLC.
8 * Nicholas A. Bellinger <nab@kernel.org>
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43 #include <target/target_core_fabric_configfs.h>
44 #include <target/target_core_configfs.h>
45 #include <target/configfs_macros.h>
47 #include "target_core_internal.h"
48 #include "target_core_alua.h"
49 #include "target_core_pr.h"
50 #include "target_core_rd.h"
52 extern struct t10_alua_lu_gp *default_lu_gp;
54 static LIST_HEAD(g_tf_list);
55 static DEFINE_MUTEX(g_tf_lock);
57 struct target_core_configfs_attribute {
58 struct configfs_attribute attr;
59 ssize_t (*show)(void *, char *);
60 ssize_t (*store)(void *, const char *, size_t);
63 static struct config_group target_core_hbagroup;
64 static struct config_group alua_group;
65 static struct config_group alua_lu_gps_group;
67 static inline struct se_hba *
68 item_to_hba(struct config_item *item)
70 return container_of(to_config_group(item), struct se_hba, hba_group);
74 * Attributes for /sys/kernel/config/target/
76 static ssize_t target_core_attr_show(struct config_item *item,
77 struct configfs_attribute *attr,
80 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
81 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
82 utsname()->sysname, utsname()->machine);
85 static struct configfs_item_operations target_core_fabric_item_ops = {
86 .show_attribute = target_core_attr_show,
89 static struct configfs_attribute target_core_item_attr_version = {
90 .ca_owner = THIS_MODULE,
95 static struct target_fabric_configfs *target_core_get_fabric(
98 struct target_fabric_configfs *tf;
103 mutex_lock(&g_tf_lock);
104 list_for_each_entry(tf, &g_tf_list, tf_list) {
105 if (!strcmp(tf->tf_name, name)) {
106 atomic_inc(&tf->tf_access_cnt);
107 mutex_unlock(&g_tf_lock);
111 mutex_unlock(&g_tf_lock);
117 * Called from struct target_core_group_ops->make_group()
119 static struct config_group *target_core_register_fabric(
120 struct config_group *group,
123 struct target_fabric_configfs *tf;
126 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
127 " %s\n", group, name);
129 * Below are some hardcoded request_module() calls to automatically
130 * local fabric modules when the following is called:
132 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134 * Note that this does not limit which TCM fabric module can be
135 * registered, but simply provids auto loading logic for modules with
136 * mkdir(2) system calls with known TCM fabric modules.
138 if (!strncmp(name, "iscsi", 5)) {
140 * Automatically load the LIO Target fabric module when the
141 * following is called:
143 * mkdir -p $CONFIGFS/target/iscsi
145 ret = request_module("iscsi_target_mod");
147 pr_err("request_module() failed for"
148 " iscsi_target_mod.ko: %d\n", ret);
149 return ERR_PTR(-EINVAL);
151 } else if (!strncmp(name, "loopback", 8)) {
153 * Automatically load the tcm_loop fabric module when the
154 * following is called:
156 * mkdir -p $CONFIGFS/target/loopback
158 ret = request_module("tcm_loop");
160 pr_err("request_module() failed for"
161 " tcm_loop.ko: %d\n", ret);
162 return ERR_PTR(-EINVAL);
166 tf = target_core_get_fabric(name);
168 pr_err("target_core_get_fabric() failed for %s\n",
170 return ERR_PTR(-EINVAL);
172 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
173 " %s\n", tf->tf_name);
175 * On a successful target_core_get_fabric() look, the returned
176 * struct target_fabric_configfs *tf will contain a usage reference.
178 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
179 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
181 tf->tf_group.default_groups = tf->tf_default_groups;
182 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
183 tf->tf_group.default_groups[1] = NULL;
185 config_group_init_type_name(&tf->tf_group, name,
186 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
187 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
188 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
190 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
191 " %s\n", tf->tf_group.cg_item.ci_name);
193 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
195 tf->tf_ops.tf_subsys = tf->tf_subsys;
196 tf->tf_fabric = &tf->tf_group.cg_item;
197 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
200 return &tf->tf_group;
204 * Called from struct target_core_group_ops->drop_item()
206 static void target_core_deregister_fabric(
207 struct config_group *group,
208 struct config_item *item)
210 struct target_fabric_configfs *tf = container_of(
211 to_config_group(item), struct target_fabric_configfs, tf_group);
212 struct config_group *tf_group;
213 struct config_item *df_item;
216 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
217 " tf list\n", config_item_name(item));
219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
220 " %s\n", tf->tf_name);
221 atomic_dec(&tf->tf_access_cnt);
223 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
224 " tf->tf_fabric for %s\n", tf->tf_name);
225 tf->tf_fabric = NULL;
227 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
228 " %s\n", config_item_name(item));
230 tf_group = &tf->tf_group;
231 for (i = 0; tf_group->default_groups[i]; i++) {
232 df_item = &tf_group->default_groups[i]->cg_item;
233 tf_group->default_groups[i] = NULL;
234 config_item_put(df_item);
236 config_item_put(item);
239 static struct configfs_group_operations target_core_fabric_group_ops = {
240 .make_group = &target_core_register_fabric,
241 .drop_item = &target_core_deregister_fabric,
245 * All item attributes appearing in /sys/kernel/target/ appear here.
247 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
248 &target_core_item_attr_version,
253 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255 static struct config_item_type target_core_fabrics_item = {
256 .ct_item_ops = &target_core_fabric_item_ops,
257 .ct_group_ops = &target_core_fabric_group_ops,
258 .ct_attrs = target_core_fabric_item_attrs,
259 .ct_owner = THIS_MODULE,
262 static struct configfs_subsystem target_core_fabrics = {
265 .ci_namebuf = "target",
266 .ci_type = &target_core_fabrics_item,
271 static struct configfs_subsystem *target_core_subsystem[] = {
272 &target_core_fabrics,
276 /*##############################################################################
277 // Start functions called by external Target Fabrics Modules
278 //############################################################################*/
281 * First function called by fabric modules to:
283 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
284 * 2) Add struct target_fabric_configfs to g_tf_list
285 * 3) Return struct target_fabric_configfs to fabric module to be passed
286 * into target_fabric_configfs_register().
288 struct target_fabric_configfs *target_fabric_configfs_init(
289 struct module *fabric_mod,
292 struct target_fabric_configfs *tf;
295 pr_err("Unable to locate passed fabric name\n");
296 return ERR_PTR(-EINVAL);
298 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
299 pr_err("Passed name: %s exceeds TARGET_FABRIC"
300 "_NAME_SIZE\n", name);
301 return ERR_PTR(-EINVAL);
304 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
306 return ERR_PTR(-ENOMEM);
308 INIT_LIST_HEAD(&tf->tf_list);
309 atomic_set(&tf->tf_access_cnt, 0);
311 * Setup the default generic struct config_item_type's (cits) in
312 * struct target_fabric_configfs->tf_cit_tmpl
314 tf->tf_module = fabric_mod;
315 target_fabric_setup_cits(tf);
317 tf->tf_subsys = target_core_subsystem[0];
318 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
320 mutex_lock(&g_tf_lock);
321 list_add_tail(&tf->tf_list, &g_tf_list);
322 mutex_unlock(&g_tf_lock);
324 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
326 pr_debug("Initialized struct target_fabric_configfs: %p for"
327 " %s\n", tf, tf->tf_name);
330 EXPORT_SYMBOL(target_fabric_configfs_init);
333 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335 void target_fabric_configfs_free(
336 struct target_fabric_configfs *tf)
338 mutex_lock(&g_tf_lock);
339 list_del(&tf->tf_list);
340 mutex_unlock(&g_tf_lock);
344 EXPORT_SYMBOL(target_fabric_configfs_free);
347 * Perform a sanity check of the passed tf->tf_ops before completing
348 * TCM fabric module registration.
350 static int target_fabric_tf_ops_check(
351 struct target_fabric_configfs *tf)
353 struct target_core_fabric_ops *tfo = &tf->tf_ops;
355 if (!tfo->get_fabric_name) {
356 pr_err("Missing tfo->get_fabric_name()\n");
359 if (!tfo->get_fabric_proto_ident) {
360 pr_err("Missing tfo->get_fabric_proto_ident()\n");
363 if (!tfo->tpg_get_wwn) {
364 pr_err("Missing tfo->tpg_get_wwn()\n");
367 if (!tfo->tpg_get_tag) {
368 pr_err("Missing tfo->tpg_get_tag()\n");
371 if (!tfo->tpg_get_default_depth) {
372 pr_err("Missing tfo->tpg_get_default_depth()\n");
375 if (!tfo->tpg_get_pr_transport_id) {
376 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
379 if (!tfo->tpg_get_pr_transport_id_len) {
380 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
383 if (!tfo->tpg_check_demo_mode) {
384 pr_err("Missing tfo->tpg_check_demo_mode()\n");
387 if (!tfo->tpg_check_demo_mode_cache) {
388 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
391 if (!tfo->tpg_check_demo_mode_write_protect) {
392 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
395 if (!tfo->tpg_check_prod_mode_write_protect) {
396 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
399 if (!tfo->tpg_alloc_fabric_acl) {
400 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
403 if (!tfo->tpg_release_fabric_acl) {
404 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
407 if (!tfo->tpg_get_inst_index) {
408 pr_err("Missing tfo->tpg_get_inst_index()\n");
411 if (!tfo->release_cmd) {
412 pr_err("Missing tfo->release_cmd()\n");
415 if (!tfo->shutdown_session) {
416 pr_err("Missing tfo->shutdown_session()\n");
419 if (!tfo->close_session) {
420 pr_err("Missing tfo->close_session()\n");
423 if (!tfo->sess_get_index) {
424 pr_err("Missing tfo->sess_get_index()\n");
427 if (!tfo->write_pending) {
428 pr_err("Missing tfo->write_pending()\n");
431 if (!tfo->write_pending_status) {
432 pr_err("Missing tfo->write_pending_status()\n");
435 if (!tfo->set_default_node_attributes) {
436 pr_err("Missing tfo->set_default_node_attributes()\n");
439 if (!tfo->get_task_tag) {
440 pr_err("Missing tfo->get_task_tag()\n");
443 if (!tfo->get_cmd_state) {
444 pr_err("Missing tfo->get_cmd_state()\n");
447 if (!tfo->queue_data_in) {
448 pr_err("Missing tfo->queue_data_in()\n");
451 if (!tfo->queue_status) {
452 pr_err("Missing tfo->queue_status()\n");
455 if (!tfo->queue_tm_rsp) {
456 pr_err("Missing tfo->queue_tm_rsp()\n");
460 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
461 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
462 * target_core_fabric_configfs.c WWN+TPG group context code.
464 if (!tfo->fabric_make_wwn) {
465 pr_err("Missing tfo->fabric_make_wwn()\n");
468 if (!tfo->fabric_drop_wwn) {
469 pr_err("Missing tfo->fabric_drop_wwn()\n");
472 if (!tfo->fabric_make_tpg) {
473 pr_err("Missing tfo->fabric_make_tpg()\n");
476 if (!tfo->fabric_drop_tpg) {
477 pr_err("Missing tfo->fabric_drop_tpg()\n");
485 * Called 2nd from fabric module with returned parameter of
486 * struct target_fabric_configfs * from target_fabric_configfs_init().
488 * Upon a successful registration, the new fabric's struct config_item is
489 * return. Also, a pointer to this struct is set in the passed
490 * struct target_fabric_configfs.
492 int target_fabric_configfs_register(
493 struct target_fabric_configfs *tf)
498 pr_err("Unable to locate target_fabric_configfs"
502 if (!tf->tf_subsys) {
503 pr_err("Unable to target struct config_subsystem"
507 ret = target_fabric_tf_ops_check(tf);
511 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
515 EXPORT_SYMBOL(target_fabric_configfs_register);
517 void target_fabric_configfs_deregister(
518 struct target_fabric_configfs *tf)
520 struct configfs_subsystem *su;
523 pr_err("Unable to locate passed target_fabric_"
529 pr_err("Unable to locate passed tf->tf_subsys"
533 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
535 mutex_lock(&g_tf_lock);
536 if (atomic_read(&tf->tf_access_cnt)) {
537 mutex_unlock(&g_tf_lock);
538 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
542 list_del(&tf->tf_list);
543 mutex_unlock(&g_tf_lock);
545 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
546 " %s\n", tf->tf_name);
547 tf->tf_module = NULL;
548 tf->tf_subsys = NULL;
551 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
554 EXPORT_SYMBOL(target_fabric_configfs_deregister);
556 /*##############################################################################
557 // Stop functions called by external Target Fabrics Modules
558 //############################################################################*/
560 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
562 #define DEF_DEV_ATTRIB_SHOW(_name) \
563 static ssize_t target_core_dev_show_attr_##_name( \
564 struct se_dev_attrib *da, \
567 return snprintf(page, PAGE_SIZE, "%u\n", \
568 (u32)da->da_dev->dev_attrib._name); \
571 #define DEF_DEV_ATTRIB_STORE(_name) \
572 static ssize_t target_core_dev_store_attr_##_name( \
573 struct se_dev_attrib *da, \
580 ret = strict_strtoul(page, 0, &val); \
582 pr_err("strict_strtoul() failed with" \
583 " ret: %d\n", ret); \
586 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
588 return (!ret) ? count : -EINVAL; \
591 #define DEF_DEV_ATTRIB(_name) \
592 DEF_DEV_ATTRIB_SHOW(_name); \
593 DEF_DEV_ATTRIB_STORE(_name);
595 #define DEF_DEV_ATTRIB_RO(_name) \
596 DEF_DEV_ATTRIB_SHOW(_name);
598 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
599 #define SE_DEV_ATTR(_name, _mode) \
600 static struct target_core_dev_attrib_attribute \
601 target_core_dev_attrib_##_name = \
602 __CONFIGFS_EATTR(_name, _mode, \
603 target_core_dev_show_attr_##_name, \
604 target_core_dev_store_attr_##_name);
606 #define SE_DEV_ATTR_RO(_name); \
607 static struct target_core_dev_attrib_attribute \
608 target_core_dev_attrib_##_name = \
609 __CONFIGFS_EATTR_RO(_name, \
610 target_core_dev_show_attr_##_name);
612 DEF_DEV_ATTRIB(emulate_model_alias);
613 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
615 DEF_DEV_ATTRIB(emulate_dpo);
616 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
618 DEF_DEV_ATTRIB(emulate_fua_write);
619 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
621 DEF_DEV_ATTRIB(emulate_fua_read);
622 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
624 DEF_DEV_ATTRIB(emulate_write_cache);
625 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
627 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
628 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
630 DEF_DEV_ATTRIB(emulate_tas);
631 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
633 DEF_DEV_ATTRIB(emulate_tpu);
634 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
636 DEF_DEV_ATTRIB(emulate_tpws);
637 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
639 DEF_DEV_ATTRIB(enforce_pr_isids);
640 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
642 DEF_DEV_ATTRIB(is_nonrot);
643 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
645 DEF_DEV_ATTRIB(emulate_rest_reord);
646 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
648 DEF_DEV_ATTRIB_RO(hw_block_size);
649 SE_DEV_ATTR_RO(hw_block_size);
651 DEF_DEV_ATTRIB(block_size);
652 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
654 DEF_DEV_ATTRIB_RO(hw_max_sectors);
655 SE_DEV_ATTR_RO(hw_max_sectors);
657 DEF_DEV_ATTRIB(fabric_max_sectors);
658 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
660 DEF_DEV_ATTRIB(optimal_sectors);
661 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
663 DEF_DEV_ATTRIB_RO(hw_queue_depth);
664 SE_DEV_ATTR_RO(hw_queue_depth);
666 DEF_DEV_ATTRIB(queue_depth);
667 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
669 DEF_DEV_ATTRIB(max_unmap_lba_count);
670 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
672 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
673 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
675 DEF_DEV_ATTRIB(unmap_granularity);
676 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
678 DEF_DEV_ATTRIB(unmap_granularity_alignment);
679 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
681 DEF_DEV_ATTRIB(max_write_same_len);
682 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
684 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
686 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
687 &target_core_dev_attrib_emulate_model_alias.attr,
688 &target_core_dev_attrib_emulate_dpo.attr,
689 &target_core_dev_attrib_emulate_fua_write.attr,
690 &target_core_dev_attrib_emulate_fua_read.attr,
691 &target_core_dev_attrib_emulate_write_cache.attr,
692 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
693 &target_core_dev_attrib_emulate_tas.attr,
694 &target_core_dev_attrib_emulate_tpu.attr,
695 &target_core_dev_attrib_emulate_tpws.attr,
696 &target_core_dev_attrib_enforce_pr_isids.attr,
697 &target_core_dev_attrib_is_nonrot.attr,
698 &target_core_dev_attrib_emulate_rest_reord.attr,
699 &target_core_dev_attrib_hw_block_size.attr,
700 &target_core_dev_attrib_block_size.attr,
701 &target_core_dev_attrib_hw_max_sectors.attr,
702 &target_core_dev_attrib_fabric_max_sectors.attr,
703 &target_core_dev_attrib_optimal_sectors.attr,
704 &target_core_dev_attrib_hw_queue_depth.attr,
705 &target_core_dev_attrib_queue_depth.attr,
706 &target_core_dev_attrib_max_unmap_lba_count.attr,
707 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
708 &target_core_dev_attrib_unmap_granularity.attr,
709 &target_core_dev_attrib_unmap_granularity_alignment.attr,
710 &target_core_dev_attrib_max_write_same_len.attr,
714 static struct configfs_item_operations target_core_dev_attrib_ops = {
715 .show_attribute = target_core_dev_attrib_attr_show,
716 .store_attribute = target_core_dev_attrib_attr_store,
719 static struct config_item_type target_core_dev_attrib_cit = {
720 .ct_item_ops = &target_core_dev_attrib_ops,
721 .ct_attrs = target_core_dev_attrib_attrs,
722 .ct_owner = THIS_MODULE,
725 /* End functions for struct config_item_type target_core_dev_attrib_cit */
727 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
729 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
730 #define SE_DEV_WWN_ATTR(_name, _mode) \
731 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
732 __CONFIGFS_EATTR(_name, _mode, \
733 target_core_dev_wwn_show_attr_##_name, \
734 target_core_dev_wwn_store_attr_##_name);
736 #define SE_DEV_WWN_ATTR_RO(_name); \
738 static struct target_core_dev_wwn_attribute \
739 target_core_dev_wwn_##_name = \
740 __CONFIGFS_EATTR_RO(_name, \
741 target_core_dev_wwn_show_attr_##_name); \
745 * VPD page 0x80 Unit serial
747 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
748 struct t10_wwn *t10_wwn,
751 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
752 &t10_wwn->unit_serial[0]);
755 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
756 struct t10_wwn *t10_wwn,
760 struct se_device *dev = t10_wwn->t10_dev;
761 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
764 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
765 * from the struct scsi_device level firmware, do not allow
766 * VPD Unit Serial to be emulated.
768 * Note this struct scsi_device could also be emulating VPD
769 * information from its drivers/scsi LLD. But for now we assume
770 * it is doing 'the right thing' wrt a world wide unique
771 * VPD Unit Serial Number that OS dependent multipath can depend on.
773 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
774 pr_err("Underlying SCSI device firmware provided VPD"
775 " Unit Serial, ignoring request\n");
779 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
780 pr_err("Emulated VPD Unit Serial exceeds"
781 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
785 * Check to see if any active $FABRIC_MOD exports exist. If they
786 * do exist, fail here as changing this information on the fly
787 * (underneath the initiator side OS dependent multipath code)
788 * could cause negative effects.
790 if (dev->export_count) {
791 pr_err("Unable to set VPD Unit Serial while"
792 " active %d $FABRIC_MOD exports exist\n",
798 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
800 * Also, strip any newline added from the userspace
801 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
803 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
804 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
805 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
806 "%s", strstrip(buf));
807 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
809 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
810 " %s\n", dev->t10_wwn.unit_serial);
815 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
818 * VPD page 0x83 Protocol Identifier
820 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
821 struct t10_wwn *t10_wwn,
825 unsigned char buf[VPD_TMP_BUF_SIZE];
828 memset(buf, 0, VPD_TMP_BUF_SIZE);
830 spin_lock(&t10_wwn->t10_vpd_lock);
831 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
832 if (!vpd->protocol_identifier_set)
835 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
837 if (len + strlen(buf) >= PAGE_SIZE)
840 len += sprintf(page+len, "%s", buf);
842 spin_unlock(&t10_wwn->t10_vpd_lock);
847 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
848 struct t10_wwn *t10_wwn,
855 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
858 * Generic wrapper for dumping VPD identifiers by association.
860 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
861 static ssize_t target_core_dev_wwn_show_attr_##_name( \
862 struct t10_wwn *t10_wwn, \
865 struct t10_vpd *vpd; \
866 unsigned char buf[VPD_TMP_BUF_SIZE]; \
869 spin_lock(&t10_wwn->t10_vpd_lock); \
870 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
871 if (vpd->association != _assoc) \
874 memset(buf, 0, VPD_TMP_BUF_SIZE); \
875 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
876 if (len + strlen(buf) >= PAGE_SIZE) \
878 len += sprintf(page+len, "%s", buf); \
880 memset(buf, 0, VPD_TMP_BUF_SIZE); \
881 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
882 if (len + strlen(buf) >= PAGE_SIZE) \
884 len += sprintf(page+len, "%s", buf); \
886 memset(buf, 0, VPD_TMP_BUF_SIZE); \
887 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
888 if (len + strlen(buf) >= PAGE_SIZE) \
890 len += sprintf(page+len, "%s", buf); \
892 spin_unlock(&t10_wwn->t10_vpd_lock); \
898 * VPD page 0x83 Association: Logical Unit
900 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
902 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
903 struct t10_wwn *t10_wwn,
910 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
913 * VPD page 0x83 Association: Target Port
915 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
917 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
918 struct t10_wwn *t10_wwn,
925 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
928 * VPD page 0x83 Association: SCSI Target Device
930 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
932 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
933 struct t10_wwn *t10_wwn,
940 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
942 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
944 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
945 &target_core_dev_wwn_vpd_unit_serial.attr,
946 &target_core_dev_wwn_vpd_protocol_identifier.attr,
947 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
948 &target_core_dev_wwn_vpd_assoc_target_port.attr,
949 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
953 static struct configfs_item_operations target_core_dev_wwn_ops = {
954 .show_attribute = target_core_dev_wwn_attr_show,
955 .store_attribute = target_core_dev_wwn_attr_store,
958 static struct config_item_type target_core_dev_wwn_cit = {
959 .ct_item_ops = &target_core_dev_wwn_ops,
960 .ct_attrs = target_core_dev_wwn_attrs,
961 .ct_owner = THIS_MODULE,
964 /* End functions for struct config_item_type target_core_dev_wwn_cit */
966 /* Start functions for struct config_item_type target_core_dev_pr_cit */
968 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
969 #define SE_DEV_PR_ATTR(_name, _mode) \
970 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
971 __CONFIGFS_EATTR(_name, _mode, \
972 target_core_dev_pr_show_attr_##_name, \
973 target_core_dev_pr_store_attr_##_name);
975 #define SE_DEV_PR_ATTR_RO(_name); \
976 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
977 __CONFIGFS_EATTR_RO(_name, \
978 target_core_dev_pr_show_attr_##_name);
980 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
983 struct se_node_acl *se_nacl;
984 struct t10_pr_registration *pr_reg;
985 char i_buf[PR_REG_ISID_ID_LEN];
988 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
990 pr_reg = dev->dev_pr_res_holder;
992 return sprintf(page, "No SPC-3 Reservation holder\n");
994 se_nacl = pr_reg->pr_reg_nacl;
995 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
998 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
999 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1000 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1003 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1006 struct se_node_acl *se_nacl;
1009 se_nacl = dev->dev_reserved_node_acl;
1012 "SPC-2 Reservation: %s Initiator: %s\n",
1013 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1014 se_nacl->initiatorname);
1016 len = sprintf(page, "No SPC-2 Reservation holder\n");
1021 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1026 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1027 return sprintf(page, "Passthrough\n");
1029 spin_lock(&dev->dev_reservation_lock);
1030 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1031 ret = target_core_dev_pr_show_spc2_res(dev, page);
1033 ret = target_core_dev_pr_show_spc3_res(dev, page);
1034 spin_unlock(&dev->dev_reservation_lock);
1038 SE_DEV_PR_ATTR_RO(res_holder);
1040 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1041 struct se_device *dev, char *page)
1045 spin_lock(&dev->dev_reservation_lock);
1046 if (!dev->dev_pr_res_holder) {
1047 len = sprintf(page, "No SPC-3 Reservation holder\n");
1048 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1049 len = sprintf(page, "SPC-3 Reservation: All Target"
1050 " Ports registration\n");
1052 len = sprintf(page, "SPC-3 Reservation: Single"
1053 " Target Port registration\n");
1056 spin_unlock(&dev->dev_reservation_lock);
1060 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1062 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1063 struct se_device *dev, char *page)
1065 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1068 SE_DEV_PR_ATTR_RO(res_pr_generation);
1071 * res_pr_holder_tg_port
1073 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1074 struct se_device *dev, char *page)
1076 struct se_node_acl *se_nacl;
1078 struct se_portal_group *se_tpg;
1079 struct t10_pr_registration *pr_reg;
1080 struct target_core_fabric_ops *tfo;
1083 spin_lock(&dev->dev_reservation_lock);
1084 pr_reg = dev->dev_pr_res_holder;
1086 len = sprintf(page, "No SPC-3 Reservation holder\n");
1090 se_nacl = pr_reg->pr_reg_nacl;
1091 se_tpg = se_nacl->se_tpg;
1092 lun = pr_reg->pr_reg_tg_pt_lun;
1093 tfo = se_tpg->se_tpg_tfo;
1095 len += sprintf(page+len, "SPC-3 Reservation: %s"
1096 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1097 tfo->tpg_get_wwn(se_tpg));
1098 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1099 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1100 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1101 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1102 tfo->get_fabric_name(), lun->unpacked_lun);
1105 spin_unlock(&dev->dev_reservation_lock);
1109 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1111 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1112 struct se_device *dev, char *page)
1114 struct target_core_fabric_ops *tfo;
1115 struct t10_pr_registration *pr_reg;
1116 unsigned char buf[384];
1117 char i_buf[PR_REG_ISID_ID_LEN];
1119 int reg_count = 0, prf_isid;
1121 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1123 spin_lock(&dev->t10_pr.registration_lock);
1124 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1127 memset(buf, 0, 384);
1128 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1129 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1130 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1131 PR_REG_ISID_ID_LEN);
1132 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1133 tfo->get_fabric_name(),
1134 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1135 &i_buf[0] : "", pr_reg->pr_res_key,
1136 pr_reg->pr_res_generation);
1138 if (len + strlen(buf) >= PAGE_SIZE)
1141 len += sprintf(page+len, "%s", buf);
1144 spin_unlock(&dev->t10_pr.registration_lock);
1147 len += sprintf(page+len, "None\n");
1152 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1154 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1155 struct se_device *dev, char *page)
1157 struct t10_pr_registration *pr_reg;
1160 spin_lock(&dev->dev_reservation_lock);
1161 pr_reg = dev->dev_pr_res_holder;
1163 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1164 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1166 len = sprintf(page, "No SPC-3 Reservation holder\n");
1169 spin_unlock(&dev->dev_reservation_lock);
1173 SE_DEV_PR_ATTR_RO(res_pr_type);
1175 static ssize_t target_core_dev_pr_show_attr_res_type(
1176 struct se_device *dev, char *page)
1178 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1179 return sprintf(page, "SPC_PASSTHROUGH\n");
1180 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1181 return sprintf(page, "SPC2_RESERVATIONS\n");
1183 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1186 SE_DEV_PR_ATTR_RO(res_type);
1188 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1189 struct se_device *dev, char *page)
1191 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1194 return sprintf(page, "APTPL Bit Status: %s\n",
1195 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1198 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1201 * res_aptpl_metadata
1203 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1204 struct se_device *dev, char *page)
1206 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1209 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1213 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1214 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1215 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1216 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1219 static match_table_t tokens = {
1220 {Opt_initiator_fabric, "initiator_fabric=%s"},
1221 {Opt_initiator_node, "initiator_node=%s"},
1222 {Opt_initiator_sid, "initiator_sid=%s"},
1223 {Opt_sa_res_key, "sa_res_key=%s"},
1224 {Opt_res_holder, "res_holder=%d"},
1225 {Opt_res_type, "res_type=%d"},
1226 {Opt_res_scope, "res_scope=%d"},
1227 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1228 {Opt_mapped_lun, "mapped_lun=%d"},
1229 {Opt_target_fabric, "target_fabric=%s"},
1230 {Opt_target_node, "target_node=%s"},
1231 {Opt_tpgt, "tpgt=%d"},
1232 {Opt_port_rtpi, "port_rtpi=%d"},
1233 {Opt_target_lun, "target_lun=%d"},
1237 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1238 struct se_device *dev,
1242 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1243 unsigned char *t_fabric = NULL, *t_port = NULL;
1244 char *orig, *ptr, *arg_p, *opts;
1245 substring_t args[MAX_OPT_ARGS];
1246 unsigned long long tmp_ll;
1248 u32 mapped_lun = 0, target_lun = 0;
1249 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1250 u16 port_rpti = 0, tpgt = 0;
1253 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1255 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1258 if (dev->export_count) {
1259 pr_debug("Unable to process APTPL metadata while"
1260 " active fabric exports exist\n");
1264 opts = kstrdup(page, GFP_KERNEL);
1269 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1273 token = match_token(ptr, tokens, args);
1275 case Opt_initiator_fabric:
1276 i_fabric = match_strdup(&args[0]);
1282 case Opt_initiator_node:
1283 i_port = match_strdup(&args[0]);
1288 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1289 pr_err("APTPL metadata initiator_node="
1290 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1291 PR_APTPL_MAX_IPORT_LEN);
1296 case Opt_initiator_sid:
1297 isid = match_strdup(&args[0]);
1302 if (strlen(isid) >= PR_REG_ISID_LEN) {
1303 pr_err("APTPL metadata initiator_isid"
1304 "= exceeds PR_REG_ISID_LEN: %d\n",
1310 case Opt_sa_res_key:
1311 arg_p = match_strdup(&args[0]);
1316 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1318 pr_err("strict_strtoull() failed for"
1322 sa_res_key = (u64)tmp_ll;
1325 * PR APTPL Metadata for Reservation
1327 case Opt_res_holder:
1328 match_int(args, &arg);
1332 match_int(args, &arg);
1336 match_int(args, &arg);
1339 case Opt_res_all_tg_pt:
1340 match_int(args, &arg);
1341 all_tg_pt = (int)arg;
1343 case Opt_mapped_lun:
1344 match_int(args, &arg);
1345 mapped_lun = (u32)arg;
1348 * PR APTPL Metadata for Target Port
1350 case Opt_target_fabric:
1351 t_fabric = match_strdup(&args[0]);
1357 case Opt_target_node:
1358 t_port = match_strdup(&args[0]);
1363 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1364 pr_err("APTPL metadata target_node="
1365 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1366 PR_APTPL_MAX_TPORT_LEN);
1372 match_int(args, &arg);
1376 match_int(args, &arg);
1377 port_rpti = (u16)arg;
1379 case Opt_target_lun:
1380 match_int(args, &arg);
1381 target_lun = (u32)arg;
1388 if (!i_port || !t_port || !sa_res_key) {
1389 pr_err("Illegal parameters for APTPL registration\n");
1394 if (res_holder && !(type)) {
1395 pr_err("Illegal PR type: 0x%02x for reservation"
1401 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1402 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1403 res_holder, all_tg_pt, type);
1411 return (ret == 0) ? count : ret;
1414 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1416 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1418 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1419 &target_core_dev_pr_res_holder.attr,
1420 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1421 &target_core_dev_pr_res_pr_generation.attr,
1422 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1423 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1424 &target_core_dev_pr_res_pr_type.attr,
1425 &target_core_dev_pr_res_type.attr,
1426 &target_core_dev_pr_res_aptpl_active.attr,
1427 &target_core_dev_pr_res_aptpl_metadata.attr,
1431 static struct configfs_item_operations target_core_dev_pr_ops = {
1432 .show_attribute = target_core_dev_pr_attr_show,
1433 .store_attribute = target_core_dev_pr_attr_store,
1436 static struct config_item_type target_core_dev_pr_cit = {
1437 .ct_item_ops = &target_core_dev_pr_ops,
1438 .ct_attrs = target_core_dev_pr_attrs,
1439 .ct_owner = THIS_MODULE,
1442 /* End functions for struct config_item_type target_core_dev_pr_cit */
1444 /* Start functions for struct config_item_type target_core_dev_cit */
1446 static ssize_t target_core_show_dev_info(void *p, char *page)
1448 struct se_device *dev = p;
1449 struct se_subsystem_api *t = dev->transport;
1451 ssize_t read_bytes = 0;
1453 transport_dump_dev_state(dev, page, &bl);
1455 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1459 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1460 .attr = { .ca_owner = THIS_MODULE,
1462 .ca_mode = S_IRUGO },
1463 .show = target_core_show_dev_info,
1467 static ssize_t target_core_store_dev_control(
1472 struct se_device *dev = p;
1473 struct se_subsystem_api *t = dev->transport;
1475 return t->set_configfs_dev_params(dev, page, count);
1478 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1479 .attr = { .ca_owner = THIS_MODULE,
1480 .ca_name = "control",
1481 .ca_mode = S_IWUSR },
1483 .store = target_core_store_dev_control,
1486 static ssize_t target_core_show_dev_alias(void *p, char *page)
1488 struct se_device *dev = p;
1490 if (!(dev->dev_flags & DF_USING_ALIAS))
1493 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1496 static ssize_t target_core_store_dev_alias(
1501 struct se_device *dev = p;
1502 struct se_hba *hba = dev->se_hba;
1505 if (count > (SE_DEV_ALIAS_LEN-1)) {
1506 pr_err("alias count: %d exceeds"
1507 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1508 SE_DEV_ALIAS_LEN-1);
1512 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1515 if (dev->dev_alias[read_bytes - 1] == '\n')
1516 dev->dev_alias[read_bytes - 1] = '\0';
1518 dev->dev_flags |= DF_USING_ALIAS;
1520 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1521 config_item_name(&hba->hba_group.cg_item),
1522 config_item_name(&dev->dev_group.cg_item),
1528 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1529 .attr = { .ca_owner = THIS_MODULE,
1531 .ca_mode = S_IRUGO | S_IWUSR },
1532 .show = target_core_show_dev_alias,
1533 .store = target_core_store_dev_alias,
1536 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1538 struct se_device *dev = p;
1540 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1543 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1546 static ssize_t target_core_store_dev_udev_path(
1551 struct se_device *dev = p;
1552 struct se_hba *hba = dev->se_hba;
1555 if (count > (SE_UDEV_PATH_LEN-1)) {
1556 pr_err("udev_path count: %d exceeds"
1557 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1558 SE_UDEV_PATH_LEN-1);
1562 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1566 if (dev->udev_path[read_bytes - 1] == '\n')
1567 dev->udev_path[read_bytes - 1] = '\0';
1569 dev->dev_flags |= DF_USING_UDEV_PATH;
1571 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1572 config_item_name(&hba->hba_group.cg_item),
1573 config_item_name(&dev->dev_group.cg_item),
1579 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1580 .attr = { .ca_owner = THIS_MODULE,
1581 .ca_name = "udev_path",
1582 .ca_mode = S_IRUGO | S_IWUSR },
1583 .show = target_core_show_dev_udev_path,
1584 .store = target_core_store_dev_udev_path,
1587 static ssize_t target_core_show_dev_enable(void *p, char *page)
1589 struct se_device *dev = p;
1591 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1594 static ssize_t target_core_store_dev_enable(
1599 struct se_device *dev = p;
1603 ptr = strstr(page, "1");
1605 pr_err("For dev_enable ops, only valid value"
1610 ret = target_configure_device(dev);
1616 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1617 .attr = { .ca_owner = THIS_MODULE,
1618 .ca_name = "enable",
1619 .ca_mode = S_IRUGO | S_IWUSR },
1620 .show = target_core_show_dev_enable,
1621 .store = target_core_store_dev_enable,
1624 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1626 struct se_device *dev = p;
1627 struct config_item *lu_ci;
1628 struct t10_alua_lu_gp *lu_gp;
1629 struct t10_alua_lu_gp_member *lu_gp_mem;
1632 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1636 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1637 lu_gp = lu_gp_mem->lu_gp;
1639 lu_ci = &lu_gp->lu_gp_group.cg_item;
1640 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1641 config_item_name(lu_ci), lu_gp->lu_gp_id);
1643 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1648 static ssize_t target_core_store_alua_lu_gp(
1653 struct se_device *dev = p;
1654 struct se_hba *hba = dev->se_hba;
1655 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1656 struct t10_alua_lu_gp_member *lu_gp_mem;
1657 unsigned char buf[LU_GROUP_NAME_BUF];
1660 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1664 if (count > LU_GROUP_NAME_BUF) {
1665 pr_err("ALUA LU Group Alias too large!\n");
1668 memset(buf, 0, LU_GROUP_NAME_BUF);
1669 memcpy(buf, page, count);
1671 * Any ALUA logical unit alias besides "NULL" means we will be
1672 * making a new group association.
1674 if (strcmp(strstrip(buf), "NULL")) {
1676 * core_alua_get_lu_gp_by_name() will increment reference to
1677 * struct t10_alua_lu_gp. This reference is released with
1678 * core_alua_get_lu_gp_by_name below().
1680 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1685 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1686 lu_gp = lu_gp_mem->lu_gp;
1689 * Clearing an existing lu_gp association, and replacing
1693 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1694 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1696 config_item_name(&hba->hba_group.cg_item),
1697 config_item_name(&dev->dev_group.cg_item),
1698 config_item_name(&lu_gp->lu_gp_group.cg_item),
1701 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1702 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1707 * Removing existing association of lu_gp_mem with lu_gp
1709 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1713 * Associate lu_gp_mem with lu_gp_new.
1715 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1716 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1718 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1719 " core/alua/lu_gps/%s, ID: %hu\n",
1720 (move) ? "Moving" : "Adding",
1721 config_item_name(&hba->hba_group.cg_item),
1722 config_item_name(&dev->dev_group.cg_item),
1723 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1724 lu_gp_new->lu_gp_id);
1726 core_alua_put_lu_gp_from_name(lu_gp_new);
1730 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1731 .attr = { .ca_owner = THIS_MODULE,
1732 .ca_name = "alua_lu_gp",
1733 .ca_mode = S_IRUGO | S_IWUSR },
1734 .show = target_core_show_alua_lu_gp,
1735 .store = target_core_store_alua_lu_gp,
1738 static struct configfs_attribute *lio_core_dev_attrs[] = {
1739 &target_core_attr_dev_info.attr,
1740 &target_core_attr_dev_control.attr,
1741 &target_core_attr_dev_alias.attr,
1742 &target_core_attr_dev_udev_path.attr,
1743 &target_core_attr_dev_enable.attr,
1744 &target_core_attr_dev_alua_lu_gp.attr,
1748 static void target_core_dev_release(struct config_item *item)
1750 struct config_group *dev_cg = to_config_group(item);
1751 struct se_device *dev =
1752 container_of(dev_cg, struct se_device, dev_group);
1754 kfree(dev_cg->default_groups);
1755 target_free_device(dev);
1758 static ssize_t target_core_dev_show(struct config_item *item,
1759 struct configfs_attribute *attr,
1762 struct config_group *dev_cg = to_config_group(item);
1763 struct se_device *dev =
1764 container_of(dev_cg, struct se_device, dev_group);
1765 struct target_core_configfs_attribute *tc_attr = container_of(
1766 attr, struct target_core_configfs_attribute, attr);
1771 return tc_attr->show(dev, page);
1774 static ssize_t target_core_dev_store(struct config_item *item,
1775 struct configfs_attribute *attr,
1776 const char *page, size_t count)
1778 struct config_group *dev_cg = to_config_group(item);
1779 struct se_device *dev =
1780 container_of(dev_cg, struct se_device, dev_group);
1781 struct target_core_configfs_attribute *tc_attr = container_of(
1782 attr, struct target_core_configfs_attribute, attr);
1784 if (!tc_attr->store)
1787 return tc_attr->store(dev, page, count);
1790 static struct configfs_item_operations target_core_dev_item_ops = {
1791 .release = target_core_dev_release,
1792 .show_attribute = target_core_dev_show,
1793 .store_attribute = target_core_dev_store,
1796 static struct config_item_type target_core_dev_cit = {
1797 .ct_item_ops = &target_core_dev_item_ops,
1798 .ct_attrs = lio_core_dev_attrs,
1799 .ct_owner = THIS_MODULE,
1802 /* End functions for struct config_item_type target_core_dev_cit */
1804 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1806 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1807 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1808 static struct target_core_alua_lu_gp_attribute \
1809 target_core_alua_lu_gp_##_name = \
1810 __CONFIGFS_EATTR(_name, _mode, \
1811 target_core_alua_lu_gp_show_attr_##_name, \
1812 target_core_alua_lu_gp_store_attr_##_name);
1814 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1815 static struct target_core_alua_lu_gp_attribute \
1816 target_core_alua_lu_gp_##_name = \
1817 __CONFIGFS_EATTR_RO(_name, \
1818 target_core_alua_lu_gp_show_attr_##_name);
1823 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1824 struct t10_alua_lu_gp *lu_gp,
1827 if (!lu_gp->lu_gp_valid_id)
1830 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1833 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1834 struct t10_alua_lu_gp *lu_gp,
1838 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1839 unsigned long lu_gp_id;
1842 ret = strict_strtoul(page, 0, &lu_gp_id);
1844 pr_err("strict_strtoul() returned %d for"
1845 " lu_gp_id\n", ret);
1848 if (lu_gp_id > 0x0000ffff) {
1849 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1850 " 0x0000ffff\n", lu_gp_id);
1854 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1858 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1859 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1860 config_item_name(&alua_lu_gp_cg->cg_item),
1866 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1871 static ssize_t target_core_alua_lu_gp_show_attr_members(
1872 struct t10_alua_lu_gp *lu_gp,
1875 struct se_device *dev;
1877 struct t10_alua_lu_gp_member *lu_gp_mem;
1878 ssize_t len = 0, cur_len;
1879 unsigned char buf[LU_GROUP_NAME_BUF];
1881 memset(buf, 0, LU_GROUP_NAME_BUF);
1883 spin_lock(&lu_gp->lu_gp_lock);
1884 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1885 dev = lu_gp_mem->lu_gp_mem_dev;
1888 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1889 config_item_name(&hba->hba_group.cg_item),
1890 config_item_name(&dev->dev_group.cg_item));
1891 cur_len++; /* Extra byte for NULL terminator */
1893 if ((cur_len + len) > PAGE_SIZE) {
1894 pr_warn("Ran out of lu_gp_show_attr"
1895 "_members buffer\n");
1898 memcpy(page+len, buf, cur_len);
1901 spin_unlock(&lu_gp->lu_gp_lock);
1906 SE_DEV_ALUA_LU_ATTR_RO(members);
1908 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1910 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1911 &target_core_alua_lu_gp_lu_gp_id.attr,
1912 &target_core_alua_lu_gp_members.attr,
1916 static void target_core_alua_lu_gp_release(struct config_item *item)
1918 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1919 struct t10_alua_lu_gp, lu_gp_group);
1921 core_alua_free_lu_gp(lu_gp);
1924 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1925 .release = target_core_alua_lu_gp_release,
1926 .show_attribute = target_core_alua_lu_gp_attr_show,
1927 .store_attribute = target_core_alua_lu_gp_attr_store,
1930 static struct config_item_type target_core_alua_lu_gp_cit = {
1931 .ct_item_ops = &target_core_alua_lu_gp_ops,
1932 .ct_attrs = target_core_alua_lu_gp_attrs,
1933 .ct_owner = THIS_MODULE,
1936 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1938 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1940 static struct config_group *target_core_alua_create_lu_gp(
1941 struct config_group *group,
1944 struct t10_alua_lu_gp *lu_gp;
1945 struct config_group *alua_lu_gp_cg = NULL;
1946 struct config_item *alua_lu_gp_ci = NULL;
1948 lu_gp = core_alua_allocate_lu_gp(name, 0);
1952 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1953 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1955 config_group_init_type_name(alua_lu_gp_cg, name,
1956 &target_core_alua_lu_gp_cit);
1958 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1959 " Group: core/alua/lu_gps/%s\n",
1960 config_item_name(alua_lu_gp_ci));
1962 return alua_lu_gp_cg;
1966 static void target_core_alua_drop_lu_gp(
1967 struct config_group *group,
1968 struct config_item *item)
1970 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1971 struct t10_alua_lu_gp, lu_gp_group);
1973 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1974 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1975 config_item_name(item), lu_gp->lu_gp_id);
1977 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1978 * -> target_core_alua_lu_gp_release()
1980 config_item_put(item);
1983 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1984 .make_group = &target_core_alua_create_lu_gp,
1985 .drop_item = &target_core_alua_drop_lu_gp,
1988 static struct config_item_type target_core_alua_lu_gps_cit = {
1989 .ct_item_ops = NULL,
1990 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1991 .ct_owner = THIS_MODULE,
1994 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1996 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1998 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1999 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2000 static struct target_core_alua_tg_pt_gp_attribute \
2001 target_core_alua_tg_pt_gp_##_name = \
2002 __CONFIGFS_EATTR(_name, _mode, \
2003 target_core_alua_tg_pt_gp_show_attr_##_name, \
2004 target_core_alua_tg_pt_gp_store_attr_##_name);
2006 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2007 static struct target_core_alua_tg_pt_gp_attribute \
2008 target_core_alua_tg_pt_gp_##_name = \
2009 __CONFIGFS_EATTR_RO(_name, \
2010 target_core_alua_tg_pt_gp_show_attr_##_name);
2015 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2016 struct t10_alua_tg_pt_gp *tg_pt_gp,
2019 return sprintf(page, "%d\n",
2020 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2023 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2024 struct t10_alua_tg_pt_gp *tg_pt_gp,
2028 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2032 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2033 pr_err("Unable to do implict ALUA on non valid"
2034 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2037 if (!(dev->dev_flags & DF_CONFIGURED)) {
2038 pr_err("Unable to set alua_access_state while device is"
2039 " not configured\n");
2043 ret = strict_strtoul(page, 0, &tmp);
2045 pr_err("Unable to extract new ALUA access state from"
2049 new_state = (int)tmp;
2051 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2052 pr_err("Unable to process implict configfs ALUA"
2053 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2057 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2058 NULL, NULL, new_state, 0);
2059 return (!ret) ? count : -EINVAL;
2062 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2065 * alua_access_status
2067 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2068 struct t10_alua_tg_pt_gp *tg_pt_gp,
2071 return sprintf(page, "%s\n",
2072 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2075 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2076 struct t10_alua_tg_pt_gp *tg_pt_gp,
2081 int new_status, ret;
2083 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2084 pr_err("Unable to do set ALUA access status on non"
2085 " valid tg_pt_gp ID: %hu\n",
2086 tg_pt_gp->tg_pt_gp_valid_id);
2090 ret = strict_strtoul(page, 0, &tmp);
2092 pr_err("Unable to extract new ALUA access status"
2093 " from %s\n", page);
2096 new_status = (int)tmp;
2098 if ((new_status != ALUA_STATUS_NONE) &&
2099 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2100 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2101 pr_err("Illegal ALUA access status: 0x%02x\n",
2106 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2110 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2115 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2116 struct t10_alua_tg_pt_gp *tg_pt_gp,
2119 return core_alua_show_access_type(tg_pt_gp, page);
2122 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2123 struct t10_alua_tg_pt_gp *tg_pt_gp,
2127 return core_alua_store_access_type(tg_pt_gp, page, count);
2130 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2133 * alua_write_metadata
2135 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2136 struct t10_alua_tg_pt_gp *tg_pt_gp,
2139 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2142 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2143 struct t10_alua_tg_pt_gp *tg_pt_gp,
2150 ret = strict_strtoul(page, 0, &tmp);
2152 pr_err("Unable to extract alua_write_metadata\n");
2156 if ((tmp != 0) && (tmp != 1)) {
2157 pr_err("Illegal value for alua_write_metadata:"
2161 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2166 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2173 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2174 struct t10_alua_tg_pt_gp *tg_pt_gp,
2177 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2181 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2182 struct t10_alua_tg_pt_gp *tg_pt_gp,
2186 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2189 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2194 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2195 struct t10_alua_tg_pt_gp *tg_pt_gp,
2198 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2201 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2202 struct t10_alua_tg_pt_gp *tg_pt_gp,
2206 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2209 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2212 * implict_trans_secs
2214 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2215 struct t10_alua_tg_pt_gp *tg_pt_gp,
2218 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2221 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2222 struct t10_alua_tg_pt_gp *tg_pt_gp,
2226 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2229 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2235 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2236 struct t10_alua_tg_pt_gp *tg_pt_gp,
2239 return core_alua_show_preferred_bit(tg_pt_gp, page);
2242 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2243 struct t10_alua_tg_pt_gp *tg_pt_gp,
2247 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2250 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2255 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2256 struct t10_alua_tg_pt_gp *tg_pt_gp,
2259 if (!tg_pt_gp->tg_pt_gp_valid_id)
2262 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2265 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2266 struct t10_alua_tg_pt_gp *tg_pt_gp,
2270 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2271 unsigned long tg_pt_gp_id;
2274 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2276 pr_err("strict_strtoul() returned %d for"
2277 " tg_pt_gp_id\n", ret);
2280 if (tg_pt_gp_id > 0x0000ffff) {
2281 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2282 " 0x0000ffff\n", tg_pt_gp_id);
2286 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2290 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2291 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2292 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2293 tg_pt_gp->tg_pt_gp_id);
2298 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2303 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2304 struct t10_alua_tg_pt_gp *tg_pt_gp,
2307 struct se_port *port;
2308 struct se_portal_group *tpg;
2310 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2311 ssize_t len = 0, cur_len;
2312 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2314 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2316 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2317 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2318 tg_pt_gp_mem_list) {
2319 port = tg_pt_gp_mem->tg_pt;
2320 tpg = port->sep_tpg;
2321 lun = port->sep_lun;
2323 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2324 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2325 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2326 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2327 config_item_name(&lun->lun_group.cg_item));
2328 cur_len++; /* Extra byte for NULL terminator */
2330 if ((cur_len + len) > PAGE_SIZE) {
2331 pr_warn("Ran out of lu_gp_show_attr"
2332 "_members buffer\n");
2335 memcpy(page+len, buf, cur_len);
2338 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2343 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2345 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2348 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2349 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2350 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2351 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2352 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2353 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2354 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2355 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2356 &target_core_alua_tg_pt_gp_preferred.attr,
2357 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2358 &target_core_alua_tg_pt_gp_members.attr,
2362 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2364 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2365 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2367 core_alua_free_tg_pt_gp(tg_pt_gp);
2370 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2371 .release = target_core_alua_tg_pt_gp_release,
2372 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2373 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2376 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2377 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2378 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2379 .ct_owner = THIS_MODULE,
2382 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2384 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2386 static struct config_group *target_core_alua_create_tg_pt_gp(
2387 struct config_group *group,
2390 struct t10_alua *alua = container_of(group, struct t10_alua,
2391 alua_tg_pt_gps_group);
2392 struct t10_alua_tg_pt_gp *tg_pt_gp;
2393 struct config_group *alua_tg_pt_gp_cg = NULL;
2394 struct config_item *alua_tg_pt_gp_ci = NULL;
2396 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2400 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2401 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2403 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2404 &target_core_alua_tg_pt_gp_cit);
2406 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2407 " Group: alua/tg_pt_gps/%s\n",
2408 config_item_name(alua_tg_pt_gp_ci));
2410 return alua_tg_pt_gp_cg;
2413 static void target_core_alua_drop_tg_pt_gp(
2414 struct config_group *group,
2415 struct config_item *item)
2417 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2418 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2420 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2421 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2422 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2424 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2425 * -> target_core_alua_tg_pt_gp_release().
2427 config_item_put(item);
2430 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2431 .make_group = &target_core_alua_create_tg_pt_gp,
2432 .drop_item = &target_core_alua_drop_tg_pt_gp,
2435 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2436 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2437 .ct_owner = THIS_MODULE,
2440 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2442 /* Start functions for struct config_item_type target_core_alua_cit */
2445 * target_core_alua_cit is a ConfigFS group that lives under
2446 * /sys/kernel/config/target/core/alua. There are default groups
2447 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2448 * target_core_alua_cit in target_core_init_configfs() below.
2450 static struct config_item_type target_core_alua_cit = {
2451 .ct_item_ops = NULL,
2453 .ct_owner = THIS_MODULE,
2456 /* End functions for struct config_item_type target_core_alua_cit */
2458 /* Start functions for struct config_item_type target_core_stat_cit */
2460 static struct config_group *target_core_stat_mkdir(
2461 struct config_group *group,
2464 return ERR_PTR(-ENOSYS);
2467 static void target_core_stat_rmdir(
2468 struct config_group *group,
2469 struct config_item *item)
2474 static struct configfs_group_operations target_core_stat_group_ops = {
2475 .make_group = &target_core_stat_mkdir,
2476 .drop_item = &target_core_stat_rmdir,
2479 static struct config_item_type target_core_stat_cit = {
2480 .ct_group_ops = &target_core_stat_group_ops,
2481 .ct_owner = THIS_MODULE,
2484 /* End functions for struct config_item_type target_core_stat_cit */
2486 /* Start functions for struct config_item_type target_core_hba_cit */
2488 static struct config_group *target_core_make_subdev(
2489 struct config_group *group,
2492 struct t10_alua_tg_pt_gp *tg_pt_gp;
2493 struct se_subsystem_api *t;
2494 struct config_item *hba_ci = &group->cg_item;
2495 struct se_hba *hba = item_to_hba(hba_ci);
2496 struct se_device *dev;
2497 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2498 struct config_group *dev_stat_grp = NULL;
2499 int errno = -ENOMEM, ret;
2501 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2503 return ERR_PTR(ret);
2505 * Locate the struct se_subsystem_api from parent's struct se_hba.
2509 dev = target_alloc_device(hba, name);
2513 dev_cg = &dev->dev_group;
2515 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2517 if (!dev_cg->default_groups)
2518 goto out_free_device;
2520 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2521 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2522 &target_core_dev_attrib_cit);
2523 config_group_init_type_name(&dev->dev_pr_group, "pr",
2524 &target_core_dev_pr_cit);
2525 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2526 &target_core_dev_wwn_cit);
2527 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2528 "alua", &target_core_alua_tg_pt_gps_cit);
2529 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2530 "statistics", &target_core_stat_cit);
2532 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2533 dev_cg->default_groups[1] = &dev->dev_pr_group;
2534 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2535 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2536 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2537 dev_cg->default_groups[5] = NULL;
2539 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2541 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2543 goto out_free_dev_cg_default_groups;
2544 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2546 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2547 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2549 if (!tg_pt_gp_cg->default_groups) {
2550 pr_err("Unable to allocate tg_pt_gp_cg->"
2551 "default_groups\n");
2552 goto out_free_tg_pt_gp;
2555 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2556 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2557 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2558 tg_pt_gp_cg->default_groups[1] = NULL;
2560 * Add core/$HBA/$DEV/statistics/ default groups
2562 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2563 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2565 if (!dev_stat_grp->default_groups) {
2566 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2567 goto out_free_tg_pt_gp_cg_default_groups;
2569 target_stat_setup_dev_default_groups(dev);
2571 mutex_unlock(&hba->hba_access_mutex);
2574 out_free_tg_pt_gp_cg_default_groups:
2575 kfree(tg_pt_gp_cg->default_groups);
2577 core_alua_free_tg_pt_gp(tg_pt_gp);
2578 out_free_dev_cg_default_groups:
2579 kfree(dev_cg->default_groups);
2581 target_free_device(dev);
2583 mutex_unlock(&hba->hba_access_mutex);
2584 return ERR_PTR(errno);
2587 static void target_core_drop_subdev(
2588 struct config_group *group,
2589 struct config_item *item)
2591 struct config_group *dev_cg = to_config_group(item);
2592 struct se_device *dev =
2593 container_of(dev_cg, struct se_device, dev_group);
2595 struct config_item *df_item;
2596 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2599 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2601 mutex_lock(&hba->hba_access_mutex);
2603 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2604 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2605 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2606 dev_stat_grp->default_groups[i] = NULL;
2607 config_item_put(df_item);
2609 kfree(dev_stat_grp->default_groups);
2611 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2612 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2613 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2614 tg_pt_gp_cg->default_groups[i] = NULL;
2615 config_item_put(df_item);
2617 kfree(tg_pt_gp_cg->default_groups);
2619 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2620 * directly from target_core_alua_tg_pt_gp_release().
2622 dev->t10_alua.default_tg_pt_gp = NULL;
2624 for (i = 0; dev_cg->default_groups[i]; i++) {
2625 df_item = &dev_cg->default_groups[i]->cg_item;
2626 dev_cg->default_groups[i] = NULL;
2627 config_item_put(df_item);
2630 * se_dev is released from target_core_dev_item_ops->release()
2632 config_item_put(item);
2633 mutex_unlock(&hba->hba_access_mutex);
2636 static struct configfs_group_operations target_core_hba_group_ops = {
2637 .make_group = target_core_make_subdev,
2638 .drop_item = target_core_drop_subdev,
2641 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2642 #define SE_HBA_ATTR(_name, _mode) \
2643 static struct target_core_hba_attribute \
2644 target_core_hba_##_name = \
2645 __CONFIGFS_EATTR(_name, _mode, \
2646 target_core_hba_show_attr_##_name, \
2647 target_core_hba_store_attr_##_name);
2649 #define SE_HBA_ATTR_RO(_name) \
2650 static struct target_core_hba_attribute \
2651 target_core_hba_##_name = \
2652 __CONFIGFS_EATTR_RO(_name, \
2653 target_core_hba_show_attr_##_name);
2655 static ssize_t target_core_hba_show_attr_hba_info(
2659 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2660 hba->hba_id, hba->transport->name,
2661 TARGET_CORE_CONFIGFS_VERSION);
2664 SE_HBA_ATTR_RO(hba_info);
2666 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2671 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2674 return sprintf(page, "%d\n", hba_mode);
2677 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2678 const char *page, size_t count)
2680 struct se_subsystem_api *transport = hba->transport;
2681 unsigned long mode_flag;
2684 if (transport->pmode_enable_hba == NULL)
2687 ret = strict_strtoul(page, 0, &mode_flag);
2689 pr_err("Unable to extract hba mode flag: %d\n", ret);
2693 if (hba->dev_count) {
2694 pr_err("Unable to set hba_mode with active devices\n");
2698 ret = transport->pmode_enable_hba(hba, mode_flag);
2702 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2704 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2709 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2711 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2713 static void target_core_hba_release(struct config_item *item)
2715 struct se_hba *hba = container_of(to_config_group(item),
2716 struct se_hba, hba_group);
2717 core_delete_hba(hba);
2720 static struct configfs_attribute *target_core_hba_attrs[] = {
2721 &target_core_hba_hba_info.attr,
2722 &target_core_hba_hba_mode.attr,
2726 static struct configfs_item_operations target_core_hba_item_ops = {
2727 .release = target_core_hba_release,
2728 .show_attribute = target_core_hba_attr_show,
2729 .store_attribute = target_core_hba_attr_store,
2732 static struct config_item_type target_core_hba_cit = {
2733 .ct_item_ops = &target_core_hba_item_ops,
2734 .ct_group_ops = &target_core_hba_group_ops,
2735 .ct_attrs = target_core_hba_attrs,
2736 .ct_owner = THIS_MODULE,
2739 static struct config_group *target_core_call_addhbatotarget(
2740 struct config_group *group,
2743 char *se_plugin_str, *str, *str2;
2745 char buf[TARGET_CORE_NAME_MAX_LEN];
2746 unsigned long plugin_dep_id = 0;
2749 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2750 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2751 pr_err("Passed *name strlen(): %d exceeds"
2752 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2753 TARGET_CORE_NAME_MAX_LEN);
2754 return ERR_PTR(-ENAMETOOLONG);
2756 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2758 str = strstr(buf, "_");
2760 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2761 return ERR_PTR(-EINVAL);
2763 se_plugin_str = buf;
2765 * Special case for subsystem plugins that have "_" in their names.
2766 * Namely rd_direct and rd_mcp..
2768 str2 = strstr(str+1, "_");
2770 *str2 = '\0'; /* Terminate for *se_plugin_str */
2771 str2++; /* Skip to start of plugin dependent ID */
2774 *str = '\0'; /* Terminate for *se_plugin_str */
2775 str++; /* Skip to start of plugin dependent ID */
2778 ret = strict_strtoul(str, 0, &plugin_dep_id);
2780 pr_err("strict_strtoul() returned %d for"
2781 " plugin_dep_id\n", ret);
2782 return ERR_PTR(-EINVAL);
2785 * Load up TCM subsystem plugins if they have not already been loaded.
2787 transport_subsystem_check_init();
2789 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2791 return ERR_CAST(hba);
2793 config_group_init_type_name(&hba->hba_group, name,
2794 &target_core_hba_cit);
2796 return &hba->hba_group;
2799 static void target_core_call_delhbafromtarget(
2800 struct config_group *group,
2801 struct config_item *item)
2804 * core_delete_hba() is called from target_core_hba_item_ops->release()
2805 * -> target_core_hba_release()
2807 config_item_put(item);
2810 static struct configfs_group_operations target_core_group_ops = {
2811 .make_group = target_core_call_addhbatotarget,
2812 .drop_item = target_core_call_delhbafromtarget,
2815 static struct config_item_type target_core_cit = {
2816 .ct_item_ops = NULL,
2817 .ct_group_ops = &target_core_group_ops,
2819 .ct_owner = THIS_MODULE,
2822 /* Stop functions for struct config_item_type target_core_hba_cit */
2824 static int __init target_core_init_configfs(void)
2826 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2827 struct config_group *lu_gp_cg = NULL;
2828 struct configfs_subsystem *subsys;
2829 struct t10_alua_lu_gp *lu_gp;
2832 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2833 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2834 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2836 subsys = target_core_subsystem[0];
2837 config_group_init(&subsys->su_group);
2838 mutex_init(&subsys->su_mutex);
2840 ret = init_se_kmem_caches();
2844 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2845 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2847 target_cg = &subsys->su_group;
2848 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2850 if (!target_cg->default_groups) {
2851 pr_err("Unable to allocate target_cg->default_groups\n");
2856 config_group_init_type_name(&target_core_hbagroup,
2857 "core", &target_core_cit);
2858 target_cg->default_groups[0] = &target_core_hbagroup;
2859 target_cg->default_groups[1] = NULL;
2861 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2863 hba_cg = &target_core_hbagroup;
2864 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2866 if (!hba_cg->default_groups) {
2867 pr_err("Unable to allocate hba_cg->default_groups\n");
2871 config_group_init_type_name(&alua_group,
2872 "alua", &target_core_alua_cit);
2873 hba_cg->default_groups[0] = &alua_group;
2874 hba_cg->default_groups[1] = NULL;
2876 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2877 * groups under /sys/kernel/config/target/core/alua/
2879 alua_cg = &alua_group;
2880 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2882 if (!alua_cg->default_groups) {
2883 pr_err("Unable to allocate alua_cg->default_groups\n");
2888 config_group_init_type_name(&alua_lu_gps_group,
2889 "lu_gps", &target_core_alua_lu_gps_cit);
2890 alua_cg->default_groups[0] = &alua_lu_gps_group;
2891 alua_cg->default_groups[1] = NULL;
2893 * Add core/alua/lu_gps/default_lu_gp
2895 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2896 if (IS_ERR(lu_gp)) {
2901 lu_gp_cg = &alua_lu_gps_group;
2902 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2904 if (!lu_gp_cg->default_groups) {
2905 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2910 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2911 &target_core_alua_lu_gp_cit);
2912 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2913 lu_gp_cg->default_groups[1] = NULL;
2914 default_lu_gp = lu_gp;
2916 * Register the target_core_mod subsystem with configfs.
2918 ret = configfs_register_subsystem(subsys);
2920 pr_err("Error %d while registering subsystem %s\n",
2921 ret, subsys->su_group.cg_item.ci_namebuf);
2924 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2925 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2926 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2928 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2930 ret = rd_module_init();
2934 ret = core_dev_setup_virtual_lun0();
2941 configfs_unregister_subsystem(subsys);
2942 core_dev_release_virtual_lun0();
2945 if (default_lu_gp) {
2946 core_alua_free_lu_gp(default_lu_gp);
2947 default_lu_gp = NULL;
2950 kfree(lu_gp_cg->default_groups);
2952 kfree(alua_cg->default_groups);
2954 kfree(hba_cg->default_groups);
2955 kfree(target_cg->default_groups);
2956 release_se_kmem_caches();
2960 static void __exit target_core_exit_configfs(void)
2962 struct configfs_subsystem *subsys;
2963 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2964 struct config_item *item;
2967 subsys = target_core_subsystem[0];
2969 lu_gp_cg = &alua_lu_gps_group;
2970 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2971 item = &lu_gp_cg->default_groups[i]->cg_item;
2972 lu_gp_cg->default_groups[i] = NULL;
2973 config_item_put(item);
2975 kfree(lu_gp_cg->default_groups);
2976 lu_gp_cg->default_groups = NULL;
2978 alua_cg = &alua_group;
2979 for (i = 0; alua_cg->default_groups[i]; i++) {
2980 item = &alua_cg->default_groups[i]->cg_item;
2981 alua_cg->default_groups[i] = NULL;
2982 config_item_put(item);
2984 kfree(alua_cg->default_groups);
2985 alua_cg->default_groups = NULL;
2987 hba_cg = &target_core_hbagroup;
2988 for (i = 0; hba_cg->default_groups[i]; i++) {
2989 item = &hba_cg->default_groups[i]->cg_item;
2990 hba_cg->default_groups[i] = NULL;
2991 config_item_put(item);
2993 kfree(hba_cg->default_groups);
2994 hba_cg->default_groups = NULL;
2996 * We expect subsys->su_group.default_groups to be released
2997 * by configfs subsystem provider logic..
2999 configfs_unregister_subsystem(subsys);
3000 kfree(subsys->su_group.default_groups);
3002 core_alua_free_lu_gp(default_lu_gp);
3003 default_lu_gp = NULL;
3005 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3006 " Infrastructure\n");
3008 core_dev_release_virtual_lun0();
3010 release_se_kmem_caches();
3013 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3014 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3015 MODULE_LICENSE("GPL");
3017 module_init(target_core_init_configfs);
3018 module_exit(target_core_exit_configfs);