1 /*******************************************************************************
2 * Filename: target_core_configfs.c
4 * This file contains ConfigFS logic for the Generic Target Engine project.
6 * Copyright (c) 2008-2010 Rising Tide Systems
7 * Copyright (c) 2008-2010 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 <linux/version.h>
27 #include <generated/utsrelease.h>
28 #include <linux/utsname.h>
29 #include <linux/init.h>
31 #include <linux/namei.h>
32 #include <linux/slab.h>
33 #include <linux/types.h>
34 #include <linux/delay.h>
35 #include <linux/unistd.h>
36 #include <linux/string.h>
37 #include <linux/parser.h>
38 #include <linux/syscalls.h>
39 #include <linux/configfs.h>
41 #include <target/target_core_base.h>
42 #include <target/target_core_device.h>
43 #include <target/target_core_transport.h>
44 #include <target/target_core_fabric_ops.h>
45 #include <target/target_core_fabric_configfs.h>
46 #include <target/target_core_configfs.h>
47 #include <target/configfs_macros.h>
49 #include "target_core_alua.h"
50 #include "target_core_hba.h"
51 #include "target_core_pr.h"
52 #include "target_core_rd.h"
54 static struct list_head g_tf_list;
55 static struct 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 inline struct se_hba *
64 item_to_hba(struct config_item *item)
66 return container_of(to_config_group(item), struct se_hba, hba_group);
70 * Attributes for /sys/kernel/config/target/
72 static ssize_t target_core_attr_show(struct config_item *item,
73 struct configfs_attribute *attr,
76 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
77 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
78 utsname()->sysname, utsname()->machine);
81 static struct configfs_item_operations target_core_fabric_item_ops = {
82 .show_attribute = target_core_attr_show,
85 static struct configfs_attribute target_core_item_attr_version = {
86 .ca_owner = THIS_MODULE,
91 static struct target_fabric_configfs *target_core_get_fabric(
94 struct target_fabric_configfs *tf;
99 mutex_lock(&g_tf_lock);
100 list_for_each_entry(tf, &g_tf_list, tf_list) {
101 if (!(strcmp(tf->tf_name, name))) {
102 atomic_inc(&tf->tf_access_cnt);
103 mutex_unlock(&g_tf_lock);
107 mutex_unlock(&g_tf_lock);
113 * Called from struct target_core_group_ops->make_group()
115 static struct config_group *target_core_register_fabric(
116 struct config_group *group,
119 struct target_fabric_configfs *tf;
122 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
123 " %s\n", group, name);
125 * Ensure that TCM subsystem plugins are loaded at this point for
126 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
129 if (transport_subsystem_check_init() < 0)
130 return ERR_PTR(-EINVAL);
133 * Below are some hardcoded request_module() calls to automatically
134 * local fabric modules when the following is called:
136 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
138 * Note that this does not limit which TCM fabric module can be
139 * registered, but simply provids auto loading logic for modules with
140 * mkdir(2) system calls with known TCM fabric modules.
142 if (!(strncmp(name, "iscsi", 5))) {
144 * Automatically load the LIO Target fabric module when the
145 * following is called:
147 * mkdir -p $CONFIGFS/target/iscsi
149 ret = request_module("iscsi_target_mod");
151 printk(KERN_ERR "request_module() failed for"
152 " iscsi_target_mod.ko: %d\n", ret);
153 return ERR_PTR(-EINVAL);
155 } else if (!(strncmp(name, "loopback", 8))) {
157 * Automatically load the tcm_loop fabric module when the
158 * following is called:
160 * mkdir -p $CONFIGFS/target/loopback
162 ret = request_module("tcm_loop");
164 printk(KERN_ERR "request_module() failed for"
165 " tcm_loop.ko: %d\n", ret);
166 return ERR_PTR(-EINVAL);
170 tf = target_core_get_fabric(name);
172 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
174 return ERR_PTR(-EINVAL);
176 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
177 " %s\n", tf->tf_name);
179 * On a successful target_core_get_fabric() look, the returned
180 * struct target_fabric_configfs *tf will contain a usage reference.
182 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
183 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
185 tf->tf_group.default_groups = tf->tf_default_groups;
186 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
187 tf->tf_group.default_groups[1] = NULL;
189 config_group_init_type_name(&tf->tf_group, name,
190 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
191 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
192 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
194 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
195 " %s\n", tf->tf_group.cg_item.ci_name);
197 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
199 tf->tf_ops.tf_subsys = tf->tf_subsys;
200 tf->tf_fabric = &tf->tf_group.cg_item;
201 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
204 return &tf->tf_group;
208 * Called from struct target_core_group_ops->drop_item()
210 static void target_core_deregister_fabric(
211 struct config_group *group,
212 struct config_item *item)
214 struct target_fabric_configfs *tf = container_of(
215 to_config_group(item), struct target_fabric_configfs, tf_group);
216 struct config_group *tf_group;
217 struct config_item *df_item;
220 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
221 " tf list\n", config_item_name(item));
223 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
224 " %s\n", tf->tf_name);
225 atomic_dec(&tf->tf_access_cnt);
227 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
228 " tf->tf_fabric for %s\n", tf->tf_name);
229 tf->tf_fabric = NULL;
231 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
232 " %s\n", config_item_name(item));
234 tf_group = &tf->tf_group;
235 for (i = 0; tf_group->default_groups[i]; i++) {
236 df_item = &tf_group->default_groups[i]->cg_item;
237 tf_group->default_groups[i] = NULL;
238 config_item_put(df_item);
240 config_item_put(item);
243 static struct configfs_group_operations target_core_fabric_group_ops = {
244 .make_group = &target_core_register_fabric,
245 .drop_item = &target_core_deregister_fabric,
249 * All item attributes appearing in /sys/kernel/target/ appear here.
251 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
252 &target_core_item_attr_version,
257 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
259 static struct config_item_type target_core_fabrics_item = {
260 .ct_item_ops = &target_core_fabric_item_ops,
261 .ct_group_ops = &target_core_fabric_group_ops,
262 .ct_attrs = target_core_fabric_item_attrs,
263 .ct_owner = THIS_MODULE,
266 static struct configfs_subsystem target_core_fabrics = {
269 .ci_namebuf = "target",
270 .ci_type = &target_core_fabrics_item,
275 static struct configfs_subsystem *target_core_subsystem[] = {
276 &target_core_fabrics,
280 /*##############################################################################
281 // Start functions called by external Target Fabrics Modules
282 //############################################################################*/
285 * First function called by fabric modules to:
287 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
288 * 2) Add struct target_fabric_configfs to g_tf_list
289 * 3) Return struct target_fabric_configfs to fabric module to be passed
290 * into target_fabric_configfs_register().
292 struct target_fabric_configfs *target_fabric_configfs_init(
293 struct module *fabric_mod,
296 struct target_fabric_configfs *tf;
299 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
303 printk(KERN_ERR "Unable to locate passed fabric name\n");
306 if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
307 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
308 "_NAME_SIZE\n", name);
312 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
314 return ERR_PTR(-ENOMEM);
316 INIT_LIST_HEAD(&tf->tf_list);
317 atomic_set(&tf->tf_access_cnt, 0);
319 * Setup the default generic struct config_item_type's (cits) in
320 * struct target_fabric_configfs->tf_cit_tmpl
322 tf->tf_module = fabric_mod;
323 target_fabric_setup_cits(tf);
325 tf->tf_subsys = target_core_subsystem[0];
326 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
328 mutex_lock(&g_tf_lock);
329 list_add_tail(&tf->tf_list, &g_tf_list);
330 mutex_unlock(&g_tf_lock);
332 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
334 printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
335 " %s\n", tf, tf->tf_name);
338 EXPORT_SYMBOL(target_fabric_configfs_init);
341 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
343 void target_fabric_configfs_free(
344 struct target_fabric_configfs *tf)
346 mutex_lock(&g_tf_lock);
347 list_del(&tf->tf_list);
348 mutex_unlock(&g_tf_lock);
352 EXPORT_SYMBOL(target_fabric_configfs_free);
355 * Perform a sanity check of the passed tf->tf_ops before completing
356 * TCM fabric module registration.
358 static int target_fabric_tf_ops_check(
359 struct target_fabric_configfs *tf)
361 struct target_core_fabric_ops *tfo = &tf->tf_ops;
363 if (!(tfo->get_fabric_name)) {
364 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
367 if (!(tfo->get_fabric_proto_ident)) {
368 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
371 if (!(tfo->tpg_get_wwn)) {
372 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
375 if (!(tfo->tpg_get_tag)) {
376 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
379 if (!(tfo->tpg_get_default_depth)) {
380 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
383 if (!(tfo->tpg_get_pr_transport_id)) {
384 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
387 if (!(tfo->tpg_get_pr_transport_id_len)) {
388 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
391 if (!(tfo->tpg_check_demo_mode)) {
392 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
395 if (!(tfo->tpg_check_demo_mode_cache)) {
396 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
399 if (!(tfo->tpg_check_demo_mode_write_protect)) {
400 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
403 if (!(tfo->tpg_check_prod_mode_write_protect)) {
404 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
407 if (!(tfo->tpg_alloc_fabric_acl)) {
408 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
411 if (!(tfo->tpg_release_fabric_acl)) {
412 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
415 if (!(tfo->tpg_get_inst_index)) {
416 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
419 if (!(tfo->release_cmd_to_pool)) {
420 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
423 if (!(tfo->release_cmd_direct)) {
424 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
427 if (!(tfo->shutdown_session)) {
428 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
431 if (!(tfo->close_session)) {
432 printk(KERN_ERR "Missing tfo->close_session()\n");
435 if (!(tfo->stop_session)) {
436 printk(KERN_ERR "Missing tfo->stop_session()\n");
439 if (!(tfo->fall_back_to_erl0)) {
440 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
443 if (!(tfo->sess_logged_in)) {
444 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
447 if (!(tfo->sess_get_index)) {
448 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
451 if (!(tfo->write_pending)) {
452 printk(KERN_ERR "Missing tfo->write_pending()\n");
455 if (!(tfo->write_pending_status)) {
456 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
459 if (!(tfo->set_default_node_attributes)) {
460 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
463 if (!(tfo->get_task_tag)) {
464 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
467 if (!(tfo->get_cmd_state)) {
468 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
471 if (!(tfo->new_cmd_failure)) {
472 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
475 if (!(tfo->queue_data_in)) {
476 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
479 if (!(tfo->queue_status)) {
480 printk(KERN_ERR "Missing tfo->queue_status()\n");
483 if (!(tfo->queue_tm_rsp)) {
484 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
487 if (!(tfo->set_fabric_sense_len)) {
488 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
491 if (!(tfo->get_fabric_sense_len)) {
492 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
495 if (!(tfo->is_state_remove)) {
496 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
499 if (!(tfo->pack_lun)) {
500 printk(KERN_ERR "Missing tfo->pack_lun()\n");
504 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
505 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
506 * target_core_fabric_configfs.c WWN+TPG group context code.
508 if (!(tfo->fabric_make_wwn)) {
509 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
512 if (!(tfo->fabric_drop_wwn)) {
513 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
516 if (!(tfo->fabric_make_tpg)) {
517 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
520 if (!(tfo->fabric_drop_tpg)) {
521 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
529 * Called 2nd from fabric module with returned parameter of
530 * struct target_fabric_configfs * from target_fabric_configfs_init().
532 * Upon a successful registration, the new fabric's struct config_item is
533 * return. Also, a pointer to this struct is set in the passed
534 * struct target_fabric_configfs.
536 int target_fabric_configfs_register(
537 struct target_fabric_configfs *tf)
539 struct config_group *su_group;
543 printk(KERN_ERR "Unable to locate target_fabric_configfs"
547 if (!(tf->tf_subsys)) {
548 printk(KERN_ERR "Unable to target struct config_subsystem"
552 su_group = &tf->tf_subsys->su_group;
554 printk(KERN_ERR "Unable to locate target struct config_group"
558 ret = target_fabric_tf_ops_check(tf);
562 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
566 EXPORT_SYMBOL(target_fabric_configfs_register);
568 void target_fabric_configfs_deregister(
569 struct target_fabric_configfs *tf)
571 struct config_group *su_group;
572 struct configfs_subsystem *su;
575 printk(KERN_ERR "Unable to locate passed target_fabric_"
581 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
585 su_group = &tf->tf_subsys->su_group;
587 printk(KERN_ERR "Unable to locate target struct config_group"
592 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
594 mutex_lock(&g_tf_lock);
595 if (atomic_read(&tf->tf_access_cnt)) {
596 mutex_unlock(&g_tf_lock);
597 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
601 list_del(&tf->tf_list);
602 mutex_unlock(&g_tf_lock);
604 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
605 " %s\n", tf->tf_name);
606 tf->tf_module = NULL;
607 tf->tf_subsys = NULL;
610 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
614 EXPORT_SYMBOL(target_fabric_configfs_deregister);
616 /*##############################################################################
617 // Stop functions called by external Target Fabrics Modules
618 //############################################################################*/
620 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
622 #define DEF_DEV_ATTRIB_SHOW(_name) \
623 static ssize_t target_core_dev_show_attr_##_name( \
624 struct se_dev_attrib *da, \
627 struct se_device *dev; \
628 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
631 spin_lock(&se_dev->se_dev_lock); \
632 dev = se_dev->se_dev_ptr; \
634 spin_unlock(&se_dev->se_dev_lock); \
637 rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
638 spin_unlock(&se_dev->se_dev_lock); \
643 #define DEF_DEV_ATTRIB_STORE(_name) \
644 static ssize_t target_core_dev_store_attr_##_name( \
645 struct se_dev_attrib *da, \
649 struct se_device *dev; \
650 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
654 spin_lock(&se_dev->se_dev_lock); \
655 dev = se_dev->se_dev_ptr; \
657 spin_unlock(&se_dev->se_dev_lock); \
660 ret = strict_strtoul(page, 0, &val); \
662 spin_unlock(&se_dev->se_dev_lock); \
663 printk(KERN_ERR "strict_strtoul() failed with" \
664 " ret: %d\n", ret); \
667 ret = se_dev_set_##_name(dev, (u32)val); \
668 spin_unlock(&se_dev->se_dev_lock); \
670 return (!ret) ? count : -EINVAL; \
673 #define DEF_DEV_ATTRIB(_name) \
674 DEF_DEV_ATTRIB_SHOW(_name); \
675 DEF_DEV_ATTRIB_STORE(_name);
677 #define DEF_DEV_ATTRIB_RO(_name) \
678 DEF_DEV_ATTRIB_SHOW(_name);
680 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
681 #define SE_DEV_ATTR(_name, _mode) \
682 static struct target_core_dev_attrib_attribute \
683 target_core_dev_attrib_##_name = \
684 __CONFIGFS_EATTR(_name, _mode, \
685 target_core_dev_show_attr_##_name, \
686 target_core_dev_store_attr_##_name);
688 #define SE_DEV_ATTR_RO(_name); \
689 static struct target_core_dev_attrib_attribute \
690 target_core_dev_attrib_##_name = \
691 __CONFIGFS_EATTR_RO(_name, \
692 target_core_dev_show_attr_##_name);
694 DEF_DEV_ATTRIB(emulate_dpo);
695 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
697 DEF_DEV_ATTRIB(emulate_fua_write);
698 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
700 DEF_DEV_ATTRIB(emulate_fua_read);
701 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
703 DEF_DEV_ATTRIB(emulate_write_cache);
704 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
706 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
707 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
709 DEF_DEV_ATTRIB(emulate_tas);
710 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
712 DEF_DEV_ATTRIB(emulate_tpu);
713 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
715 DEF_DEV_ATTRIB(emulate_tpws);
716 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
718 DEF_DEV_ATTRIB(enforce_pr_isids);
719 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
721 DEF_DEV_ATTRIB_RO(hw_block_size);
722 SE_DEV_ATTR_RO(hw_block_size);
724 DEF_DEV_ATTRIB(block_size);
725 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
727 DEF_DEV_ATTRIB_RO(hw_max_sectors);
728 SE_DEV_ATTR_RO(hw_max_sectors);
730 DEF_DEV_ATTRIB(max_sectors);
731 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
733 DEF_DEV_ATTRIB(optimal_sectors);
734 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
736 DEF_DEV_ATTRIB_RO(hw_queue_depth);
737 SE_DEV_ATTR_RO(hw_queue_depth);
739 DEF_DEV_ATTRIB(queue_depth);
740 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
742 DEF_DEV_ATTRIB(task_timeout);
743 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
745 DEF_DEV_ATTRIB(max_unmap_lba_count);
746 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
748 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
749 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
751 DEF_DEV_ATTRIB(unmap_granularity);
752 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
754 DEF_DEV_ATTRIB(unmap_granularity_alignment);
755 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
757 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
759 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
760 &target_core_dev_attrib_emulate_dpo.attr,
761 &target_core_dev_attrib_emulate_fua_write.attr,
762 &target_core_dev_attrib_emulate_fua_read.attr,
763 &target_core_dev_attrib_emulate_write_cache.attr,
764 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
765 &target_core_dev_attrib_emulate_tas.attr,
766 &target_core_dev_attrib_emulate_tpu.attr,
767 &target_core_dev_attrib_emulate_tpws.attr,
768 &target_core_dev_attrib_enforce_pr_isids.attr,
769 &target_core_dev_attrib_hw_block_size.attr,
770 &target_core_dev_attrib_block_size.attr,
771 &target_core_dev_attrib_hw_max_sectors.attr,
772 &target_core_dev_attrib_max_sectors.attr,
773 &target_core_dev_attrib_optimal_sectors.attr,
774 &target_core_dev_attrib_hw_queue_depth.attr,
775 &target_core_dev_attrib_queue_depth.attr,
776 &target_core_dev_attrib_task_timeout.attr,
777 &target_core_dev_attrib_max_unmap_lba_count.attr,
778 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
779 &target_core_dev_attrib_unmap_granularity.attr,
780 &target_core_dev_attrib_unmap_granularity_alignment.attr,
784 static struct configfs_item_operations target_core_dev_attrib_ops = {
785 .show_attribute = target_core_dev_attrib_attr_show,
786 .store_attribute = target_core_dev_attrib_attr_store,
789 static struct config_item_type target_core_dev_attrib_cit = {
790 .ct_item_ops = &target_core_dev_attrib_ops,
791 .ct_attrs = target_core_dev_attrib_attrs,
792 .ct_owner = THIS_MODULE,
795 /* End functions for struct config_item_type target_core_dev_attrib_cit */
797 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
799 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
800 #define SE_DEV_WWN_ATTR(_name, _mode) \
801 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
802 __CONFIGFS_EATTR(_name, _mode, \
803 target_core_dev_wwn_show_attr_##_name, \
804 target_core_dev_wwn_store_attr_##_name);
806 #define SE_DEV_WWN_ATTR_RO(_name); \
808 static struct target_core_dev_wwn_attribute \
809 target_core_dev_wwn_##_name = \
810 __CONFIGFS_EATTR_RO(_name, \
811 target_core_dev_wwn_show_attr_##_name); \
815 * VPD page 0x80 Unit serial
817 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
818 struct t10_wwn *t10_wwn,
821 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
822 struct se_device *dev;
824 dev = se_dev->se_dev_ptr;
828 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
829 &t10_wwn->unit_serial[0]);
832 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
833 struct t10_wwn *t10_wwn,
837 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
838 struct se_device *dev;
839 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
842 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
843 * from the struct scsi_device level firmware, do not allow
844 * VPD Unit Serial to be emulated.
846 * Note this struct scsi_device could also be emulating VPD
847 * information from its drivers/scsi LLD. But for now we assume
848 * it is doing 'the right thing' wrt a world wide unique
849 * VPD Unit Serial Number that OS dependent multipath can depend on.
851 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
852 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
853 " Unit Serial, ignoring request\n");
857 if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
858 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
859 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
863 * Check to see if any active $FABRIC_MOD exports exist. If they
864 * do exist, fail here as changing this information on the fly
865 * (underneath the initiator side OS dependent multipath code)
866 * could cause negative effects.
868 dev = su_dev->se_dev_ptr;
870 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
871 printk(KERN_ERR "Unable to set VPD Unit Serial while"
872 " active %d $FABRIC_MOD exports exist\n",
873 atomic_read(&dev->dev_export_obj.obj_access_count));
878 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
880 * Also, strip any newline added from the userspace
881 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
883 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
884 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
885 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
886 "%s", strstrip(buf));
887 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
889 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
890 " %s\n", su_dev->t10_wwn.unit_serial);
895 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
898 * VPD page 0x83 Protocol Identifier
900 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
901 struct t10_wwn *t10_wwn,
904 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
905 struct se_device *dev;
907 unsigned char buf[VPD_TMP_BUF_SIZE];
910 dev = se_dev->se_dev_ptr;
914 memset(buf, 0, VPD_TMP_BUF_SIZE);
916 spin_lock(&t10_wwn->t10_vpd_lock);
917 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
918 if (!(vpd->protocol_identifier_set))
921 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
923 if ((len + strlen(buf) > PAGE_SIZE))
926 len += sprintf(page+len, "%s", buf);
928 spin_unlock(&t10_wwn->t10_vpd_lock);
933 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
934 struct t10_wwn *t10_wwn,
941 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
944 * Generic wrapper for dumping VPD identifiers by association.
946 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
947 static ssize_t target_core_dev_wwn_show_attr_##_name( \
948 struct t10_wwn *t10_wwn, \
951 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
952 struct se_device *dev; \
953 struct t10_vpd *vpd; \
954 unsigned char buf[VPD_TMP_BUF_SIZE]; \
957 dev = se_dev->se_dev_ptr; \
961 spin_lock(&t10_wwn->t10_vpd_lock); \
962 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
963 if (vpd->association != _assoc) \
966 memset(buf, 0, VPD_TMP_BUF_SIZE); \
967 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
968 if ((len + strlen(buf) > PAGE_SIZE)) \
970 len += sprintf(page+len, "%s", buf); \
972 memset(buf, 0, VPD_TMP_BUF_SIZE); \
973 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
974 if ((len + strlen(buf) > PAGE_SIZE)) \
976 len += sprintf(page+len, "%s", buf); \
978 memset(buf, 0, VPD_TMP_BUF_SIZE); \
979 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
980 if ((len + strlen(buf) > PAGE_SIZE)) \
982 len += sprintf(page+len, "%s", buf); \
984 spin_unlock(&t10_wwn->t10_vpd_lock); \
990 * VPD page 0x83 Assoication: Logical Unit
992 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
994 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
995 struct t10_wwn *t10_wwn,
1002 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1005 * VPD page 0x83 Association: Target Port
1007 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1009 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1010 struct t10_wwn *t10_wwn,
1017 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1020 * VPD page 0x83 Association: SCSI Target Device
1022 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1024 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1025 struct t10_wwn *t10_wwn,
1032 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1034 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1036 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1037 &target_core_dev_wwn_vpd_unit_serial.attr,
1038 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1039 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1040 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1041 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1045 static struct configfs_item_operations target_core_dev_wwn_ops = {
1046 .show_attribute = target_core_dev_wwn_attr_show,
1047 .store_attribute = target_core_dev_wwn_attr_store,
1050 static struct config_item_type target_core_dev_wwn_cit = {
1051 .ct_item_ops = &target_core_dev_wwn_ops,
1052 .ct_attrs = target_core_dev_wwn_attrs,
1053 .ct_owner = THIS_MODULE,
1056 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1058 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1060 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1061 #define SE_DEV_PR_ATTR(_name, _mode) \
1062 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1063 __CONFIGFS_EATTR(_name, _mode, \
1064 target_core_dev_pr_show_attr_##_name, \
1065 target_core_dev_pr_store_attr_##_name);
1067 #define SE_DEV_PR_ATTR_RO(_name); \
1068 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1069 __CONFIGFS_EATTR_RO(_name, \
1070 target_core_dev_pr_show_attr_##_name);
1075 static ssize_t target_core_dev_pr_show_spc3_res(
1076 struct se_device *dev,
1080 struct se_node_acl *se_nacl;
1081 struct t10_pr_registration *pr_reg;
1082 char i_buf[PR_REG_ISID_ID_LEN];
1085 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1087 spin_lock(&dev->dev_reservation_lock);
1088 pr_reg = dev->dev_pr_res_holder;
1090 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1091 spin_unlock(&dev->dev_reservation_lock);
1094 se_nacl = pr_reg->pr_reg_nacl;
1095 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1096 PR_REG_ISID_ID_LEN);
1098 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1099 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1100 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1101 spin_unlock(&dev->dev_reservation_lock);
1106 static ssize_t target_core_dev_pr_show_spc2_res(
1107 struct se_device *dev,
1111 struct se_node_acl *se_nacl;
1113 spin_lock(&dev->dev_reservation_lock);
1114 se_nacl = dev->dev_reserved_node_acl;
1116 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1117 spin_unlock(&dev->dev_reservation_lock);
1120 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1121 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1122 se_nacl->initiatorname);
1123 spin_unlock(&dev->dev_reservation_lock);
1128 static ssize_t target_core_dev_pr_show_attr_res_holder(
1129 struct se_subsystem_dev *su_dev,
1134 if (!(su_dev->se_dev_ptr))
1137 switch (T10_RES(su_dev)->res_type) {
1138 case SPC3_PERSISTENT_RESERVATIONS:
1139 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1142 case SPC2_RESERVATIONS:
1143 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1146 case SPC_PASSTHROUGH:
1147 len += sprintf(page+len, "Passthrough\n");
1150 len += sprintf(page+len, "Unknown\n");
1157 SE_DEV_PR_ATTR_RO(res_holder);
1160 * res_pr_all_tgt_pts
1162 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1163 struct se_subsystem_dev *su_dev,
1166 struct se_device *dev;
1167 struct t10_pr_registration *pr_reg;
1170 dev = su_dev->se_dev_ptr;
1174 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1177 spin_lock(&dev->dev_reservation_lock);
1178 pr_reg = dev->dev_pr_res_holder;
1180 len = sprintf(page, "No SPC-3 Reservation holder\n");
1181 spin_unlock(&dev->dev_reservation_lock);
1185 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1186 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1188 if (pr_reg->pr_reg_all_tg_pt)
1189 len = sprintf(page, "SPC-3 Reservation: All Target"
1190 " Ports registration\n");
1192 len = sprintf(page, "SPC-3 Reservation: Single"
1193 " Target Port registration\n");
1194 spin_unlock(&dev->dev_reservation_lock);
1199 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1204 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1205 struct se_subsystem_dev *su_dev,
1208 if (!(su_dev->se_dev_ptr))
1211 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1214 return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1217 SE_DEV_PR_ATTR_RO(res_pr_generation);
1220 * res_pr_holder_tg_port
1222 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1223 struct se_subsystem_dev *su_dev,
1226 struct se_device *dev;
1227 struct se_node_acl *se_nacl;
1229 struct se_portal_group *se_tpg;
1230 struct t10_pr_registration *pr_reg;
1231 struct target_core_fabric_ops *tfo;
1234 dev = su_dev->se_dev_ptr;
1238 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1241 spin_lock(&dev->dev_reservation_lock);
1242 pr_reg = dev->dev_pr_res_holder;
1244 len = sprintf(page, "No SPC-3 Reservation holder\n");
1245 spin_unlock(&dev->dev_reservation_lock);
1248 se_nacl = pr_reg->pr_reg_nacl;
1249 se_tpg = se_nacl->se_tpg;
1250 lun = pr_reg->pr_reg_tg_pt_lun;
1251 tfo = TPG_TFO(se_tpg);
1253 len += sprintf(page+len, "SPC-3 Reservation: %s"
1254 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1255 tfo->tpg_get_wwn(se_tpg));
1256 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1257 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1258 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1259 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1260 tfo->get_fabric_name(), lun->unpacked_lun);
1261 spin_unlock(&dev->dev_reservation_lock);
1266 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1269 * res_pr_registered_i_pts
1271 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1272 struct se_subsystem_dev *su_dev,
1275 struct target_core_fabric_ops *tfo;
1276 struct t10_pr_registration *pr_reg;
1277 unsigned char buf[384];
1278 char i_buf[PR_REG_ISID_ID_LEN];
1280 int reg_count = 0, prf_isid;
1282 if (!(su_dev->se_dev_ptr))
1285 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1288 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1290 spin_lock(&T10_RES(su_dev)->registration_lock);
1291 list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1294 memset(buf, 0, 384);
1295 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1296 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1297 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1298 PR_REG_ISID_ID_LEN);
1299 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1300 tfo->get_fabric_name(),
1301 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1302 &i_buf[0] : "", pr_reg->pr_res_key,
1303 pr_reg->pr_res_generation);
1305 if ((len + strlen(buf) > PAGE_SIZE))
1308 len += sprintf(page+len, "%s", buf);
1311 spin_unlock(&T10_RES(su_dev)->registration_lock);
1314 len += sprintf(page+len, "None\n");
1319 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1324 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1325 struct se_subsystem_dev *su_dev,
1328 struct se_device *dev;
1329 struct t10_pr_registration *pr_reg;
1332 dev = su_dev->se_dev_ptr;
1336 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1339 spin_lock(&dev->dev_reservation_lock);
1340 pr_reg = dev->dev_pr_res_holder;
1342 len = sprintf(page, "No SPC-3 Reservation holder\n");
1343 spin_unlock(&dev->dev_reservation_lock);
1346 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1347 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1348 spin_unlock(&dev->dev_reservation_lock);
1353 SE_DEV_PR_ATTR_RO(res_pr_type);
1358 static ssize_t target_core_dev_pr_show_attr_res_type(
1359 struct se_subsystem_dev *su_dev,
1364 if (!(su_dev->se_dev_ptr))
1367 switch (T10_RES(su_dev)->res_type) {
1368 case SPC3_PERSISTENT_RESERVATIONS:
1369 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1371 case SPC2_RESERVATIONS:
1372 len = sprintf(page, "SPC2_RESERVATIONS\n");
1374 case SPC_PASSTHROUGH:
1375 len = sprintf(page, "SPC_PASSTHROUGH\n");
1378 len = sprintf(page, "UNKNOWN\n");
1385 SE_DEV_PR_ATTR_RO(res_type);
1391 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1392 struct se_subsystem_dev *su_dev,
1395 if (!(su_dev->se_dev_ptr))
1398 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1401 return sprintf(page, "APTPL Bit Status: %s\n",
1402 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1405 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1408 * res_aptpl_metadata
1410 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1411 struct se_subsystem_dev *su_dev,
1414 if (!(su_dev->se_dev_ptr))
1417 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1420 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1424 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1425 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1426 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1427 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1430 static match_table_t tokens = {
1431 {Opt_initiator_fabric, "initiator_fabric=%s"},
1432 {Opt_initiator_node, "initiator_node=%s"},
1433 {Opt_initiator_sid, "initiator_sid=%s"},
1434 {Opt_sa_res_key, "sa_res_key=%s"},
1435 {Opt_res_holder, "res_holder=%d"},
1436 {Opt_res_type, "res_type=%d"},
1437 {Opt_res_scope, "res_scope=%d"},
1438 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1439 {Opt_mapped_lun, "mapped_lun=%d"},
1440 {Opt_target_fabric, "target_fabric=%s"},
1441 {Opt_target_node, "target_node=%s"},
1442 {Opt_tpgt, "tpgt=%d"},
1443 {Opt_port_rtpi, "port_rtpi=%d"},
1444 {Opt_target_lun, "target_lun=%d"},
1448 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1449 struct se_subsystem_dev *su_dev,
1453 struct se_device *dev;
1454 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1455 unsigned char *t_fabric = NULL, *t_port = NULL;
1456 char *orig, *ptr, *arg_p, *opts;
1457 substring_t args[MAX_OPT_ARGS];
1458 unsigned long long tmp_ll;
1460 u32 mapped_lun = 0, target_lun = 0;
1461 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1462 u16 port_rpti = 0, tpgt = 0;
1465 dev = su_dev->se_dev_ptr;
1469 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1472 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1473 printk(KERN_INFO "Unable to process APTPL metadata while"
1474 " active fabric exports exist\n");
1478 opts = kstrdup(page, GFP_KERNEL);
1483 while ((ptr = strsep(&opts, ",")) != NULL) {
1487 token = match_token(ptr, tokens, args);
1489 case Opt_initiator_fabric:
1490 i_fabric = match_strdup(&args[0]);
1496 case Opt_initiator_node:
1497 i_port = match_strdup(&args[0]);
1502 if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
1503 printk(KERN_ERR "APTPL metadata initiator_node="
1504 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1505 PR_APTPL_MAX_IPORT_LEN);
1510 case Opt_initiator_sid:
1511 isid = match_strdup(&args[0]);
1516 if (strlen(isid) > PR_REG_ISID_LEN) {
1517 printk(KERN_ERR "APTPL metadata initiator_isid"
1518 "= exceeds PR_REG_ISID_LEN: %d\n",
1524 case Opt_sa_res_key:
1525 arg_p = match_strdup(&args[0]);
1530 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1532 printk(KERN_ERR "strict_strtoull() failed for"
1536 sa_res_key = (u64)tmp_ll;
1539 * PR APTPL Metadata for Reservation
1541 case Opt_res_holder:
1542 match_int(args, &arg);
1546 match_int(args, &arg);
1550 match_int(args, &arg);
1553 case Opt_res_all_tg_pt:
1554 match_int(args, &arg);
1555 all_tg_pt = (int)arg;
1557 case Opt_mapped_lun:
1558 match_int(args, &arg);
1559 mapped_lun = (u32)arg;
1562 * PR APTPL Metadata for Target Port
1564 case Opt_target_fabric:
1565 t_fabric = match_strdup(&args[0]);
1571 case Opt_target_node:
1572 t_port = match_strdup(&args[0]);
1577 if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
1578 printk(KERN_ERR "APTPL metadata target_node="
1579 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1580 PR_APTPL_MAX_TPORT_LEN);
1586 match_int(args, &arg);
1590 match_int(args, &arg);
1591 port_rpti = (u16)arg;
1593 case Opt_target_lun:
1594 match_int(args, &arg);
1595 target_lun = (u32)arg;
1602 if (!(i_port) || !(t_port) || !(sa_res_key)) {
1603 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1608 if (res_holder && !(type)) {
1609 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1615 ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1616 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1617 res_holder, all_tg_pt, type);
1625 return (ret == 0) ? count : ret;
1628 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1630 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1632 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1633 &target_core_dev_pr_res_holder.attr,
1634 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1635 &target_core_dev_pr_res_pr_generation.attr,
1636 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1637 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1638 &target_core_dev_pr_res_pr_type.attr,
1639 &target_core_dev_pr_res_type.attr,
1640 &target_core_dev_pr_res_aptpl_active.attr,
1641 &target_core_dev_pr_res_aptpl_metadata.attr,
1645 static struct configfs_item_operations target_core_dev_pr_ops = {
1646 .show_attribute = target_core_dev_pr_attr_show,
1647 .store_attribute = target_core_dev_pr_attr_store,
1650 static struct config_item_type target_core_dev_pr_cit = {
1651 .ct_item_ops = &target_core_dev_pr_ops,
1652 .ct_attrs = target_core_dev_pr_attrs,
1653 .ct_owner = THIS_MODULE,
1656 /* End functions for struct config_item_type target_core_dev_pr_cit */
1658 /* Start functions for struct config_item_type target_core_dev_cit */
1660 static ssize_t target_core_show_dev_info(void *p, char *page)
1662 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1663 struct se_hba *hba = se_dev->se_dev_hba;
1664 struct se_subsystem_api *t = hba->transport;
1666 ssize_t read_bytes = 0;
1668 if (!(se_dev->se_dev_ptr))
1671 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1673 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1677 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1678 .attr = { .ca_owner = THIS_MODULE,
1680 .ca_mode = S_IRUGO },
1681 .show = target_core_show_dev_info,
1685 static ssize_t target_core_store_dev_control(
1690 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1691 struct se_hba *hba = se_dev->se_dev_hba;
1692 struct se_subsystem_api *t = hba->transport;
1694 if (!(se_dev->se_dev_su_ptr)) {
1695 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1700 return t->set_configfs_dev_params(hba, se_dev, page, count);
1703 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1704 .attr = { .ca_owner = THIS_MODULE,
1705 .ca_name = "control",
1706 .ca_mode = S_IWUSR },
1708 .store = target_core_store_dev_control,
1711 static ssize_t target_core_show_dev_alias(void *p, char *page)
1713 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1715 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1718 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1721 static ssize_t target_core_store_dev_alias(
1726 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1727 struct se_hba *hba = se_dev->se_dev_hba;
1730 if (count > (SE_DEV_ALIAS_LEN-1)) {
1731 printk(KERN_ERR "alias count: %d exceeds"
1732 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1733 SE_DEV_ALIAS_LEN-1);
1737 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1738 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1741 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1742 config_item_name(&hba->hba_group.cg_item),
1743 config_item_name(&se_dev->se_dev_group.cg_item),
1744 se_dev->se_dev_alias);
1749 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1750 .attr = { .ca_owner = THIS_MODULE,
1752 .ca_mode = S_IRUGO | S_IWUSR },
1753 .show = target_core_show_dev_alias,
1754 .store = target_core_store_dev_alias,
1757 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1759 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1761 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1764 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1767 static ssize_t target_core_store_dev_udev_path(
1772 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1773 struct se_hba *hba = se_dev->se_dev_hba;
1776 if (count > (SE_UDEV_PATH_LEN-1)) {
1777 printk(KERN_ERR "udev_path count: %d exceeds"
1778 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1779 SE_UDEV_PATH_LEN-1);
1783 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1784 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1787 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1788 config_item_name(&hba->hba_group.cg_item),
1789 config_item_name(&se_dev->se_dev_group.cg_item),
1790 se_dev->se_dev_udev_path);
1795 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1796 .attr = { .ca_owner = THIS_MODULE,
1797 .ca_name = "udev_path",
1798 .ca_mode = S_IRUGO | S_IWUSR },
1799 .show = target_core_show_dev_udev_path,
1800 .store = target_core_store_dev_udev_path,
1803 static ssize_t target_core_store_dev_enable(
1808 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1809 struct se_device *dev;
1810 struct se_hba *hba = se_dev->se_dev_hba;
1811 struct se_subsystem_api *t = hba->transport;
1814 ptr = strstr(page, "1");
1816 printk(KERN_ERR "For dev_enable ops, only valid value"
1820 if ((se_dev->se_dev_ptr)) {
1821 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1826 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1829 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1831 return PTR_ERR(dev);
1835 se_dev->se_dev_ptr = dev;
1836 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1837 " %p\n", se_dev->se_dev_ptr);
1842 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1843 .attr = { .ca_owner = THIS_MODULE,
1844 .ca_name = "enable",
1845 .ca_mode = S_IWUSR },
1847 .store = target_core_store_dev_enable,
1850 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1852 struct se_device *dev;
1853 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1854 struct config_item *lu_ci;
1855 struct t10_alua_lu_gp *lu_gp;
1856 struct t10_alua_lu_gp_member *lu_gp_mem;
1859 dev = su_dev->se_dev_ptr;
1863 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1866 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1868 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1873 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1874 lu_gp = lu_gp_mem->lu_gp;
1876 lu_ci = &lu_gp->lu_gp_group.cg_item;
1877 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1878 config_item_name(lu_ci), lu_gp->lu_gp_id);
1880 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1885 static ssize_t target_core_store_alua_lu_gp(
1890 struct se_device *dev;
1891 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1892 struct se_hba *hba = su_dev->se_dev_hba;
1893 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1894 struct t10_alua_lu_gp_member *lu_gp_mem;
1895 unsigned char buf[LU_GROUP_NAME_BUF];
1898 dev = su_dev->se_dev_ptr;
1902 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1903 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1904 config_item_name(&hba->hba_group.cg_item),
1905 config_item_name(&su_dev->se_dev_group.cg_item));
1908 if (count > LU_GROUP_NAME_BUF) {
1909 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1912 memset(buf, 0, LU_GROUP_NAME_BUF);
1913 memcpy(buf, page, count);
1915 * Any ALUA logical unit alias besides "NULL" means we will be
1916 * making a new group association.
1918 if (strcmp(strstrip(buf), "NULL")) {
1920 * core_alua_get_lu_gp_by_name() will increment reference to
1921 * struct t10_alua_lu_gp. This reference is released with
1922 * core_alua_get_lu_gp_by_name below().
1924 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1928 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1931 core_alua_put_lu_gp_from_name(lu_gp_new);
1932 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1937 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1938 lu_gp = lu_gp_mem->lu_gp;
1941 * Clearing an existing lu_gp association, and replacing
1945 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1946 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1948 config_item_name(&hba->hba_group.cg_item),
1949 config_item_name(&su_dev->se_dev_group.cg_item),
1950 config_item_name(&lu_gp->lu_gp_group.cg_item),
1953 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1954 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1959 * Removing existing association of lu_gp_mem with lu_gp
1961 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1965 * Associate lu_gp_mem with lu_gp_new.
1967 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1968 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1970 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1971 " core/alua/lu_gps/%s, ID: %hu\n",
1972 (move) ? "Moving" : "Adding",
1973 config_item_name(&hba->hba_group.cg_item),
1974 config_item_name(&su_dev->se_dev_group.cg_item),
1975 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1976 lu_gp_new->lu_gp_id);
1978 core_alua_put_lu_gp_from_name(lu_gp_new);
1982 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1983 .attr = { .ca_owner = THIS_MODULE,
1984 .ca_name = "alua_lu_gp",
1985 .ca_mode = S_IRUGO | S_IWUSR },
1986 .show = target_core_show_alua_lu_gp,
1987 .store = target_core_store_alua_lu_gp,
1990 static struct configfs_attribute *lio_core_dev_attrs[] = {
1991 &target_core_attr_dev_info.attr,
1992 &target_core_attr_dev_control.attr,
1993 &target_core_attr_dev_alias.attr,
1994 &target_core_attr_dev_udev_path.attr,
1995 &target_core_attr_dev_enable.attr,
1996 &target_core_attr_dev_alua_lu_gp.attr,
2000 static void target_core_dev_release(struct config_item *item)
2002 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2003 struct se_subsystem_dev, se_dev_group);
2004 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2005 struct se_subsystem_api *t = hba->transport;
2006 struct config_group *dev_cg = &se_dev->se_dev_group;
2008 kfree(dev_cg->default_groups);
2010 * This pointer will set when the storage is enabled with:
2011 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2013 if (se_dev->se_dev_ptr) {
2014 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
2015 "virtual_device() for se_dev_ptr: %p\n",
2016 se_dev->se_dev_ptr);
2018 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2021 * Release struct se_subsystem_dev->se_dev_su_ptr..
2023 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2024 "device() for se_dev_su_ptr: %p\n",
2025 se_dev->se_dev_su_ptr);
2027 t->free_device(se_dev->se_dev_su_ptr);
2030 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2031 "_dev_t: %p\n", se_dev);
2035 static ssize_t target_core_dev_show(struct config_item *item,
2036 struct configfs_attribute *attr,
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->show))
2048 return tc_attr->show((void *)se_dev, page);
2051 static ssize_t target_core_dev_store(struct config_item *item,
2052 struct configfs_attribute *attr,
2053 const char *page, size_t count)
2055 struct se_subsystem_dev *se_dev = container_of(
2056 to_config_group(item), struct se_subsystem_dev,
2058 struct target_core_configfs_attribute *tc_attr = container_of(
2059 attr, struct target_core_configfs_attribute, attr);
2061 if (!(tc_attr->store))
2064 return tc_attr->store((void *)se_dev, page, count);
2067 static struct configfs_item_operations target_core_dev_item_ops = {
2068 .release = target_core_dev_release,
2069 .show_attribute = target_core_dev_show,
2070 .store_attribute = target_core_dev_store,
2073 static struct config_item_type target_core_dev_cit = {
2074 .ct_item_ops = &target_core_dev_item_ops,
2075 .ct_attrs = lio_core_dev_attrs,
2076 .ct_owner = THIS_MODULE,
2079 /* End functions for struct config_item_type target_core_dev_cit */
2081 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2083 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2084 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2085 static struct target_core_alua_lu_gp_attribute \
2086 target_core_alua_lu_gp_##_name = \
2087 __CONFIGFS_EATTR(_name, _mode, \
2088 target_core_alua_lu_gp_show_attr_##_name, \
2089 target_core_alua_lu_gp_store_attr_##_name);
2091 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2092 static struct target_core_alua_lu_gp_attribute \
2093 target_core_alua_lu_gp_##_name = \
2094 __CONFIGFS_EATTR_RO(_name, \
2095 target_core_alua_lu_gp_show_attr_##_name);
2100 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2101 struct t10_alua_lu_gp *lu_gp,
2104 if (!(lu_gp->lu_gp_valid_id))
2107 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2110 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2111 struct t10_alua_lu_gp *lu_gp,
2115 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2116 unsigned long lu_gp_id;
2119 ret = strict_strtoul(page, 0, &lu_gp_id);
2121 printk(KERN_ERR "strict_strtoul() returned %d for"
2122 " lu_gp_id\n", ret);
2125 if (lu_gp_id > 0x0000ffff) {
2126 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2127 " 0x0000ffff\n", lu_gp_id);
2131 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2135 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2136 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2137 config_item_name(&alua_lu_gp_cg->cg_item),
2143 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2148 static ssize_t target_core_alua_lu_gp_show_attr_members(
2149 struct t10_alua_lu_gp *lu_gp,
2152 struct se_device *dev;
2154 struct se_subsystem_dev *su_dev;
2155 struct t10_alua_lu_gp_member *lu_gp_mem;
2156 ssize_t len = 0, cur_len;
2157 unsigned char buf[LU_GROUP_NAME_BUF];
2159 memset(buf, 0, LU_GROUP_NAME_BUF);
2161 spin_lock(&lu_gp->lu_gp_lock);
2162 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2163 dev = lu_gp_mem->lu_gp_mem_dev;
2164 su_dev = dev->se_sub_dev;
2165 hba = su_dev->se_dev_hba;
2167 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2168 config_item_name(&hba->hba_group.cg_item),
2169 config_item_name(&su_dev->se_dev_group.cg_item));
2170 cur_len++; /* Extra byte for NULL terminator */
2172 if ((cur_len + len) > PAGE_SIZE) {
2173 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2174 "_members buffer\n");
2177 memcpy(page+len, buf, cur_len);
2180 spin_unlock(&lu_gp->lu_gp_lock);
2185 SE_DEV_ALUA_LU_ATTR_RO(members);
2187 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2189 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2190 &target_core_alua_lu_gp_lu_gp_id.attr,
2191 &target_core_alua_lu_gp_members.attr,
2195 static void target_core_alua_lu_gp_release(struct config_item *item)
2197 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2198 struct t10_alua_lu_gp, lu_gp_group);
2200 core_alua_free_lu_gp(lu_gp);
2203 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2204 .release = target_core_alua_lu_gp_release,
2205 .show_attribute = target_core_alua_lu_gp_attr_show,
2206 .store_attribute = target_core_alua_lu_gp_attr_store,
2209 static struct config_item_type target_core_alua_lu_gp_cit = {
2210 .ct_item_ops = &target_core_alua_lu_gp_ops,
2211 .ct_attrs = target_core_alua_lu_gp_attrs,
2212 .ct_owner = THIS_MODULE,
2215 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2217 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2219 static struct config_group *target_core_alua_create_lu_gp(
2220 struct config_group *group,
2223 struct t10_alua_lu_gp *lu_gp;
2224 struct config_group *alua_lu_gp_cg = NULL;
2225 struct config_item *alua_lu_gp_ci = NULL;
2227 lu_gp = core_alua_allocate_lu_gp(name, 0);
2231 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2232 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2234 config_group_init_type_name(alua_lu_gp_cg, name,
2235 &target_core_alua_lu_gp_cit);
2237 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2238 " Group: core/alua/lu_gps/%s\n",
2239 config_item_name(alua_lu_gp_ci));
2241 return alua_lu_gp_cg;
2245 static void target_core_alua_drop_lu_gp(
2246 struct config_group *group,
2247 struct config_item *item)
2249 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2250 struct t10_alua_lu_gp, lu_gp_group);
2252 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2253 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2254 config_item_name(item), lu_gp->lu_gp_id);
2256 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2257 * -> target_core_alua_lu_gp_release()
2259 config_item_put(item);
2262 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2263 .make_group = &target_core_alua_create_lu_gp,
2264 .drop_item = &target_core_alua_drop_lu_gp,
2267 static struct config_item_type target_core_alua_lu_gps_cit = {
2268 .ct_item_ops = NULL,
2269 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2270 .ct_owner = THIS_MODULE,
2273 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2275 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2277 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2278 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2279 static struct target_core_alua_tg_pt_gp_attribute \
2280 target_core_alua_tg_pt_gp_##_name = \
2281 __CONFIGFS_EATTR(_name, _mode, \
2282 target_core_alua_tg_pt_gp_show_attr_##_name, \
2283 target_core_alua_tg_pt_gp_store_attr_##_name);
2285 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2286 static struct target_core_alua_tg_pt_gp_attribute \
2287 target_core_alua_tg_pt_gp_##_name = \
2288 __CONFIGFS_EATTR_RO(_name, \
2289 target_core_alua_tg_pt_gp_show_attr_##_name);
2294 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2295 struct t10_alua_tg_pt_gp *tg_pt_gp,
2298 return sprintf(page, "%d\n",
2299 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2302 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2303 struct t10_alua_tg_pt_gp *tg_pt_gp,
2307 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2311 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2312 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2313 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2317 ret = strict_strtoul(page, 0, &tmp);
2319 printk("Unable to extract new ALUA access state from"
2323 new_state = (int)tmp;
2325 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2326 printk(KERN_ERR "Unable to process implict configfs ALUA"
2327 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2331 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2332 NULL, NULL, new_state, 0);
2333 return (!ret) ? count : -EINVAL;
2336 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2339 * alua_access_status
2341 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2342 struct t10_alua_tg_pt_gp *tg_pt_gp,
2345 return sprintf(page, "%s\n",
2346 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2349 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2350 struct t10_alua_tg_pt_gp *tg_pt_gp,
2355 int new_status, ret;
2357 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2358 printk(KERN_ERR "Unable to do set ALUA access status on non"
2359 " valid tg_pt_gp ID: %hu\n",
2360 tg_pt_gp->tg_pt_gp_valid_id);
2364 ret = strict_strtoul(page, 0, &tmp);
2366 printk(KERN_ERR "Unable to extract new ALUA access status"
2367 " from %s\n", page);
2370 new_status = (int)tmp;
2372 if ((new_status != ALUA_STATUS_NONE) &&
2373 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2374 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2375 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2380 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2384 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2389 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2390 struct t10_alua_tg_pt_gp *tg_pt_gp,
2393 return core_alua_show_access_type(tg_pt_gp, page);
2396 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2397 struct t10_alua_tg_pt_gp *tg_pt_gp,
2401 return core_alua_store_access_type(tg_pt_gp, page, count);
2404 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2407 * alua_write_metadata
2409 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2410 struct t10_alua_tg_pt_gp *tg_pt_gp,
2413 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2416 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2417 struct t10_alua_tg_pt_gp *tg_pt_gp,
2424 ret = strict_strtoul(page, 0, &tmp);
2426 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2430 if ((tmp != 0) && (tmp != 1)) {
2431 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2435 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2440 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2447 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2448 struct t10_alua_tg_pt_gp *tg_pt_gp,
2451 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2455 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2456 struct t10_alua_tg_pt_gp *tg_pt_gp,
2460 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2463 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2468 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2469 struct t10_alua_tg_pt_gp *tg_pt_gp,
2472 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2475 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2476 struct t10_alua_tg_pt_gp *tg_pt_gp,
2480 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2483 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2489 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2490 struct t10_alua_tg_pt_gp *tg_pt_gp,
2493 return core_alua_show_preferred_bit(tg_pt_gp, page);
2496 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2497 struct t10_alua_tg_pt_gp *tg_pt_gp,
2501 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2504 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2509 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2510 struct t10_alua_tg_pt_gp *tg_pt_gp,
2513 if (!(tg_pt_gp->tg_pt_gp_valid_id))
2516 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2519 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2520 struct t10_alua_tg_pt_gp *tg_pt_gp,
2524 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2525 unsigned long tg_pt_gp_id;
2528 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2530 printk(KERN_ERR "strict_strtoul() returned %d for"
2531 " tg_pt_gp_id\n", ret);
2534 if (tg_pt_gp_id > 0x0000ffff) {
2535 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2536 " 0x0000ffff\n", tg_pt_gp_id);
2540 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2544 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2545 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2546 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2547 tg_pt_gp->tg_pt_gp_id);
2552 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2557 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2558 struct t10_alua_tg_pt_gp *tg_pt_gp,
2561 struct se_port *port;
2562 struct se_portal_group *tpg;
2564 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2565 ssize_t len = 0, cur_len;
2566 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2568 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2570 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2571 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2572 tg_pt_gp_mem_list) {
2573 port = tg_pt_gp_mem->tg_pt;
2574 tpg = port->sep_tpg;
2575 lun = port->sep_lun;
2577 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2578 "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2579 TPG_TFO(tpg)->tpg_get_wwn(tpg),
2580 TPG_TFO(tpg)->tpg_get_tag(tpg),
2581 config_item_name(&lun->lun_group.cg_item));
2582 cur_len++; /* Extra byte for NULL terminator */
2584 if ((cur_len + len) > PAGE_SIZE) {
2585 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2586 "_members buffer\n");
2589 memcpy(page+len, buf, cur_len);
2592 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2597 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2599 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2602 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2603 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2604 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2605 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2606 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2607 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2608 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2609 &target_core_alua_tg_pt_gp_preferred.attr,
2610 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2611 &target_core_alua_tg_pt_gp_members.attr,
2615 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2617 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2618 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2620 core_alua_free_tg_pt_gp(tg_pt_gp);
2623 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2624 .release = target_core_alua_tg_pt_gp_release,
2625 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2626 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2629 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2630 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2631 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2632 .ct_owner = THIS_MODULE,
2635 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2637 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2639 static struct config_group *target_core_alua_create_tg_pt_gp(
2640 struct config_group *group,
2643 struct t10_alua *alua = container_of(group, struct t10_alua,
2644 alua_tg_pt_gps_group);
2645 struct t10_alua_tg_pt_gp *tg_pt_gp;
2646 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2647 struct config_group *alua_tg_pt_gp_cg = NULL;
2648 struct config_item *alua_tg_pt_gp_ci = NULL;
2650 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2654 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2655 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2657 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2658 &target_core_alua_tg_pt_gp_cit);
2660 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2661 " Group: alua/tg_pt_gps/%s\n",
2662 config_item_name(alua_tg_pt_gp_ci));
2664 return alua_tg_pt_gp_cg;
2667 static void target_core_alua_drop_tg_pt_gp(
2668 struct config_group *group,
2669 struct config_item *item)
2671 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2672 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2674 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2675 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2676 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2678 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2679 * -> target_core_alua_tg_pt_gp_release().
2681 config_item_put(item);
2684 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2685 .make_group = &target_core_alua_create_tg_pt_gp,
2686 .drop_item = &target_core_alua_drop_tg_pt_gp,
2689 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2690 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2691 .ct_owner = THIS_MODULE,
2694 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2696 /* Start functions for struct config_item_type target_core_alua_cit */
2699 * target_core_alua_cit is a ConfigFS group that lives under
2700 * /sys/kernel/config/target/core/alua. There are default groups
2701 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2702 * target_core_alua_cit in target_core_init_configfs() below.
2704 static struct config_item_type target_core_alua_cit = {
2705 .ct_item_ops = NULL,
2707 .ct_owner = THIS_MODULE,
2710 /* End functions for struct config_item_type target_core_alua_cit */
2712 /* Start functions for struct config_item_type target_core_hba_cit */
2714 static struct config_group *target_core_make_subdev(
2715 struct config_group *group,
2718 struct t10_alua_tg_pt_gp *tg_pt_gp;
2719 struct se_subsystem_dev *se_dev;
2720 struct se_subsystem_api *t;
2721 struct config_item *hba_ci = &group->cg_item;
2722 struct se_hba *hba = item_to_hba(hba_ci);
2723 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2725 if (mutex_lock_interruptible(&hba->hba_access_mutex))
2729 * Locate the struct se_subsystem_api from parent's struct se_hba.
2733 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2735 printk(KERN_ERR "Unable to allocate memory for"
2736 " struct se_subsystem_dev\n");
2739 INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2740 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2741 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2742 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2743 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2744 spin_lock_init(&se_dev->t10_reservation.registration_lock);
2745 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2746 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2747 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2748 spin_lock_init(&se_dev->se_dev_lock);
2749 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2750 se_dev->t10_wwn.t10_sub_dev = se_dev;
2751 se_dev->t10_alua.t10_sub_dev = se_dev;
2752 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2754 se_dev->se_dev_hba = hba;
2755 dev_cg = &se_dev->se_dev_group;
2757 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
2759 if (!(dev_cg->default_groups))
2762 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2763 * for ->allocate_virtdevice()
2765 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2766 * has been called successfully in the next level up in the
2767 * configfs tree for device object's struct config_group.
2769 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2770 if (!(se_dev->se_dev_su_ptr)) {
2771 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2772 " from allocate_virtdevice()\n");
2775 spin_lock(&se_global->g_device_lock);
2776 list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2777 spin_unlock(&se_global->g_device_lock);
2779 config_group_init_type_name(&se_dev->se_dev_group, name,
2780 &target_core_dev_cit);
2781 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2782 &target_core_dev_attrib_cit);
2783 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2784 &target_core_dev_pr_cit);
2785 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2786 &target_core_dev_wwn_cit);
2787 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2788 "alua", &target_core_alua_tg_pt_gps_cit);
2789 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2790 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2791 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2792 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2793 dev_cg->default_groups[4] = NULL;
2795 * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp
2797 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2801 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2802 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2804 if (!(tg_pt_gp_cg->default_groups)) {
2805 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2806 "default_groups\n");
2810 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2811 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2812 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2813 tg_pt_gp_cg->default_groups[1] = NULL;
2814 T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2816 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2817 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2819 mutex_unlock(&hba->hba_access_mutex);
2820 return &se_dev->se_dev_group;
2822 if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2823 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2824 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2827 kfree(tg_pt_gp_cg->default_groups);
2829 kfree(dev_cg->default_groups);
2830 if (se_dev->se_dev_su_ptr)
2831 t->free_device(se_dev->se_dev_su_ptr);
2834 mutex_unlock(&hba->hba_access_mutex);
2838 static void target_core_drop_subdev(
2839 struct config_group *group,
2840 struct config_item *item)
2842 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2843 struct se_subsystem_dev, se_dev_group);
2845 struct se_subsystem_api *t;
2846 struct config_item *df_item;
2847 struct config_group *dev_cg, *tg_pt_gp_cg;
2850 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2852 mutex_lock(&hba->hba_access_mutex);
2855 spin_lock(&se_global->g_device_lock);
2856 list_del(&se_dev->g_se_dev_list);
2857 spin_unlock(&se_global->g_device_lock);
2859 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2860 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2861 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2862 tg_pt_gp_cg->default_groups[i] = NULL;
2863 config_item_put(df_item);
2865 kfree(tg_pt_gp_cg->default_groups);
2867 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2868 * directly from target_core_alua_tg_pt_gp_release().
2870 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2872 dev_cg = &se_dev->se_dev_group;
2873 for (i = 0; dev_cg->default_groups[i]; i++) {
2874 df_item = &dev_cg->default_groups[i]->cg_item;
2875 dev_cg->default_groups[i] = NULL;
2876 config_item_put(df_item);
2879 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2880 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2882 config_item_put(item);
2883 mutex_unlock(&hba->hba_access_mutex);
2886 static struct configfs_group_operations target_core_hba_group_ops = {
2887 .make_group = target_core_make_subdev,
2888 .drop_item = target_core_drop_subdev,
2891 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2892 #define SE_HBA_ATTR(_name, _mode) \
2893 static struct target_core_hba_attribute \
2894 target_core_hba_##_name = \
2895 __CONFIGFS_EATTR(_name, _mode, \
2896 target_core_hba_show_attr_##_name, \
2897 target_core_hba_store_attr_##_name);
2899 #define SE_HBA_ATTR_RO(_name) \
2900 static struct target_core_hba_attribute \
2901 target_core_hba_##_name = \
2902 __CONFIGFS_EATTR_RO(_name, \
2903 target_core_hba_show_attr_##_name);
2905 static ssize_t target_core_hba_show_attr_hba_info(
2909 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2910 hba->hba_id, hba->transport->name,
2911 TARGET_CORE_CONFIGFS_VERSION);
2914 SE_HBA_ATTR_RO(hba_info);
2916 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2921 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2924 return sprintf(page, "%d\n", hba_mode);
2927 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2928 const char *page, size_t count)
2930 struct se_subsystem_api *transport = hba->transport;
2931 unsigned long mode_flag;
2934 if (transport->pmode_enable_hba == NULL)
2937 ret = strict_strtoul(page, 0, &mode_flag);
2939 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2943 spin_lock(&hba->device_lock);
2944 if (!(list_empty(&hba->hba_dev_list))) {
2945 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2946 spin_unlock(&hba->device_lock);
2949 spin_unlock(&hba->device_lock);
2951 ret = transport->pmode_enable_hba(hba, mode_flag);
2955 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2957 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2962 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2964 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2966 static void target_core_hba_release(struct config_item *item)
2968 struct se_hba *hba = container_of(to_config_group(item),
2969 struct se_hba, hba_group);
2970 core_delete_hba(hba);
2973 static struct configfs_attribute *target_core_hba_attrs[] = {
2974 &target_core_hba_hba_info.attr,
2975 &target_core_hba_hba_mode.attr,
2979 static struct configfs_item_operations target_core_hba_item_ops = {
2980 .release = target_core_hba_release,
2981 .show_attribute = target_core_hba_attr_show,
2982 .store_attribute = target_core_hba_attr_store,
2985 static struct config_item_type target_core_hba_cit = {
2986 .ct_item_ops = &target_core_hba_item_ops,
2987 .ct_group_ops = &target_core_hba_group_ops,
2988 .ct_attrs = target_core_hba_attrs,
2989 .ct_owner = THIS_MODULE,
2992 static struct config_group *target_core_call_addhbatotarget(
2993 struct config_group *group,
2996 char *se_plugin_str, *str, *str2;
2998 char buf[TARGET_CORE_NAME_MAX_LEN];
2999 unsigned long plugin_dep_id = 0;
3002 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3003 if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
3004 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
3005 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3006 TARGET_CORE_NAME_MAX_LEN);
3007 return ERR_PTR(-ENAMETOOLONG);
3009 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3011 str = strstr(buf, "_");
3013 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3014 return ERR_PTR(-EINVAL);
3016 se_plugin_str = buf;
3018 * Special case for subsystem plugins that have "_" in their names.
3019 * Namely rd_direct and rd_mcp..
3021 str2 = strstr(str+1, "_");
3023 *str2 = '\0'; /* Terminate for *se_plugin_str */
3024 str2++; /* Skip to start of plugin dependent ID */
3027 *str = '\0'; /* Terminate for *se_plugin_str */
3028 str++; /* Skip to start of plugin dependent ID */
3031 ret = strict_strtoul(str, 0, &plugin_dep_id);
3033 printk(KERN_ERR "strict_strtoul() returned %d for"
3034 " plugin_dep_id\n", ret);
3035 return ERR_PTR(-EINVAL);
3038 * Load up TCM subsystem plugins if they have not already been loaded.
3040 if (transport_subsystem_check_init() < 0)
3041 return ERR_PTR(-EINVAL);
3043 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3045 return ERR_CAST(hba);
3047 config_group_init_type_name(&hba->hba_group, name,
3048 &target_core_hba_cit);
3050 return &hba->hba_group;
3053 static void target_core_call_delhbafromtarget(
3054 struct config_group *group,
3055 struct config_item *item)
3058 * core_delete_hba() is called from target_core_hba_item_ops->release()
3059 * -> target_core_hba_release()
3061 config_item_put(item);
3064 static struct configfs_group_operations target_core_group_ops = {
3065 .make_group = target_core_call_addhbatotarget,
3066 .drop_item = target_core_call_delhbafromtarget,
3069 static struct config_item_type target_core_cit = {
3070 .ct_item_ops = NULL,
3071 .ct_group_ops = &target_core_group_ops,
3073 .ct_owner = THIS_MODULE,
3076 /* Stop functions for struct config_item_type target_core_hba_cit */
3078 static int target_core_init_configfs(void)
3080 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3081 struct config_group *lu_gp_cg = NULL;
3082 struct configfs_subsystem *subsys;
3083 struct t10_alua_lu_gp *lu_gp;
3086 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3087 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3088 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3090 subsys = target_core_subsystem[0];
3091 config_group_init(&subsys->su_group);
3092 mutex_init(&subsys->su_mutex);
3094 INIT_LIST_HEAD(&g_tf_list);
3095 mutex_init(&g_tf_lock);
3096 init_scsi_index_table();
3097 ret = init_se_global();
3101 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3102 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3104 target_cg = &subsys->su_group;
3105 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3107 if (!(target_cg->default_groups)) {
3108 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3112 config_group_init_type_name(&se_global->target_core_hbagroup,
3113 "core", &target_core_cit);
3114 target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3115 target_cg->default_groups[1] = NULL;
3117 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3119 hba_cg = &se_global->target_core_hbagroup;
3120 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3122 if (!(hba_cg->default_groups)) {
3123 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3126 config_group_init_type_name(&se_global->alua_group,
3127 "alua", &target_core_alua_cit);
3128 hba_cg->default_groups[0] = &se_global->alua_group;
3129 hba_cg->default_groups[1] = NULL;
3131 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3132 * groups under /sys/kernel/config/target/core/alua/
3134 alua_cg = &se_global->alua_group;
3135 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3137 if (!(alua_cg->default_groups)) {
3138 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3142 config_group_init_type_name(&se_global->alua_lu_gps_group,
3143 "lu_gps", &target_core_alua_lu_gps_cit);
3144 alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3145 alua_cg->default_groups[1] = NULL;
3147 * Add core/alua/lu_gps/default_lu_gp
3149 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3153 lu_gp_cg = &se_global->alua_lu_gps_group;
3154 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3156 if (!(lu_gp_cg->default_groups)) {
3157 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3161 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3162 &target_core_alua_lu_gp_cit);
3163 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3164 lu_gp_cg->default_groups[1] = NULL;
3165 se_global->default_lu_gp = lu_gp;
3167 * Register the target_core_mod subsystem with configfs.
3169 ret = configfs_register_subsystem(subsys);
3171 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3172 ret, subsys->su_group.cg_item.ci_namebuf);
3175 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3176 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3177 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3179 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3181 ret = rd_module_init();
3185 if (core_dev_setup_virtual_lun0() < 0)
3191 configfs_unregister_subsystem(subsys);
3192 core_dev_release_virtual_lun0();
3195 if (se_global->default_lu_gp) {
3196 core_alua_free_lu_gp(se_global->default_lu_gp);
3197 se_global->default_lu_gp = NULL;
3200 kfree(lu_gp_cg->default_groups);
3202 kfree(alua_cg->default_groups);
3204 kfree(hba_cg->default_groups);
3205 kfree(target_cg->default_groups);
3206 release_se_global();
3210 static void target_core_exit_configfs(void)
3212 struct configfs_subsystem *subsys;
3213 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3214 struct config_item *item;
3217 se_global->in_shutdown = 1;
3218 subsys = target_core_subsystem[0];
3220 lu_gp_cg = &se_global->alua_lu_gps_group;
3221 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3222 item = &lu_gp_cg->default_groups[i]->cg_item;
3223 lu_gp_cg->default_groups[i] = NULL;
3224 config_item_put(item);
3226 kfree(lu_gp_cg->default_groups);
3227 lu_gp_cg->default_groups = NULL;
3229 alua_cg = &se_global->alua_group;
3230 for (i = 0; alua_cg->default_groups[i]; i++) {
3231 item = &alua_cg->default_groups[i]->cg_item;
3232 alua_cg->default_groups[i] = NULL;
3233 config_item_put(item);
3235 kfree(alua_cg->default_groups);
3236 alua_cg->default_groups = NULL;
3238 hba_cg = &se_global->target_core_hbagroup;
3239 for (i = 0; hba_cg->default_groups[i]; i++) {
3240 item = &hba_cg->default_groups[i]->cg_item;
3241 hba_cg->default_groups[i] = NULL;
3242 config_item_put(item);
3244 kfree(hba_cg->default_groups);
3245 hba_cg->default_groups = NULL;
3247 * We expect subsys->su_group.default_groups to be released
3248 * by configfs subsystem provider logic..
3250 configfs_unregister_subsystem(subsys);
3251 kfree(subsys->su_group.default_groups);
3253 core_alua_free_lu_gp(se_global->default_lu_gp);
3254 se_global->default_lu_gp = NULL;
3256 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3257 " Infrastructure\n");
3259 core_dev_release_virtual_lun0();
3261 release_se_global();
3266 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3267 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3268 MODULE_LICENSE("GPL");
3270 module_init(target_core_init_configfs);
3271 module_exit(target_core_exit_configfs);