1 /*******************************************************************************
2 * Filename: target_core_configfs.c
4 * This file contains ConfigFS logic for the Generic Target Engine project.
6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
9 * Nicholas A. Bellinger <nab@kernel.org>
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <generated/utsrelease.h>
27 #include <linux/utsname.h>
28 #include <linux/init.h>
30 #include <linux/namei.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/delay.h>
34 #include <linux/unistd.h>
35 #include <linux/string.h>
36 #include <linux/parser.h>
37 #include <linux/syscalls.h>
38 #include <linux/configfs.h>
39 #include <linux/spinlock.h>
41 #include <target/target_core_base.h>
42 #include <target/target_core_backend.h>
43 #include <target/target_core_fabric.h>
44 #include <target/target_core_fabric_configfs.h>
45 #include <target/target_core_configfs.h>
46 #include <target/configfs_macros.h>
48 #include "target_core_internal.h"
49 #include "target_core_alua.h"
50 #include "target_core_pr.h"
51 #include "target_core_rd.h"
53 extern struct t10_alua_lu_gp
*default_lu_gp
;
55 static LIST_HEAD(g_tf_list
);
56 static DEFINE_MUTEX(g_tf_lock
);
58 struct target_core_configfs_attribute
{
59 struct configfs_attribute attr
;
60 ssize_t (*show
)(void *, char *);
61 ssize_t (*store
)(void *, const char *, size_t);
64 static struct config_group target_core_hbagroup
;
65 static struct config_group alua_group
;
66 static struct config_group alua_lu_gps_group
;
68 static inline struct se_hba
*
69 item_to_hba(struct config_item
*item
)
71 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
75 * Attributes for /sys/kernel/config/target/
77 static ssize_t
target_core_attr_show(struct config_item
*item
,
78 struct configfs_attribute
*attr
,
81 return sprintf(page
, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE
"\n", TARGET_CORE_CONFIGFS_VERSION
,
83 utsname()->sysname
, utsname()->machine
);
86 static struct configfs_item_operations target_core_fabric_item_ops
= {
87 .show_attribute
= target_core_attr_show
,
90 static struct configfs_attribute target_core_item_attr_version
= {
91 .ca_owner
= THIS_MODULE
,
96 static struct target_fabric_configfs
*target_core_get_fabric(
99 struct target_fabric_configfs
*tf
;
104 mutex_lock(&g_tf_lock
);
105 list_for_each_entry(tf
, &g_tf_list
, tf_list
) {
106 if (!strcmp(tf
->tf_name
, name
)) {
107 atomic_inc(&tf
->tf_access_cnt
);
108 mutex_unlock(&g_tf_lock
);
112 mutex_unlock(&g_tf_lock
);
118 * Called from struct target_core_group_ops->make_group()
120 static struct config_group
*target_core_register_fabric(
121 struct config_group
*group
,
124 struct target_fabric_configfs
*tf
;
127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
128 " %s\n", group
, name
);
130 * Below are some hardcoded request_module() calls to automatically
131 * local fabric modules when the following is called:
133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
135 * Note that this does not limit which TCM fabric module can be
136 * registered, but simply provids auto loading logic for modules with
137 * mkdir(2) system calls with known TCM fabric modules.
139 if (!strncmp(name
, "iscsi", 5)) {
141 * Automatically load the LIO Target fabric module when the
142 * following is called:
144 * mkdir -p $CONFIGFS/target/iscsi
146 ret
= request_module("iscsi_target_mod");
148 pr_err("request_module() failed for"
149 " iscsi_target_mod.ko: %d\n", ret
);
150 return ERR_PTR(-EINVAL
);
152 } else if (!strncmp(name
, "loopback", 8)) {
154 * Automatically load the tcm_loop fabric module when the
155 * following is called:
157 * mkdir -p $CONFIGFS/target/loopback
159 ret
= request_module("tcm_loop");
161 pr_err("request_module() failed for"
162 " tcm_loop.ko: %d\n", ret
);
163 return ERR_PTR(-EINVAL
);
167 tf
= target_core_get_fabric(name
);
169 pr_err("target_core_get_fabric() failed for %s\n",
171 return ERR_PTR(-EINVAL
);
173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
174 " %s\n", tf
->tf_name
);
176 * On a successful target_core_get_fabric() look, the returned
177 * struct target_fabric_configfs *tf will contain a usage reference.
179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
180 &TF_CIT_TMPL(tf
)->tfc_wwn_cit
);
182 tf
->tf_group
.default_groups
= tf
->tf_default_groups
;
183 tf
->tf_group
.default_groups
[0] = &tf
->tf_disc_group
;
184 tf
->tf_group
.default_groups
[1] = NULL
;
186 config_group_init_type_name(&tf
->tf_group
, name
,
187 &TF_CIT_TMPL(tf
)->tfc_wwn_cit
);
188 config_group_init_type_name(&tf
->tf_disc_group
, "discovery_auth",
189 &TF_CIT_TMPL(tf
)->tfc_discovery_cit
);
191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
192 " %s\n", tf
->tf_group
.cg_item
.ci_name
);
194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
196 tf
->tf_ops
.tf_subsys
= tf
->tf_subsys
;
197 tf
->tf_fabric
= &tf
->tf_group
.cg_item
;
198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
201 return &tf
->tf_group
;
205 * Called from struct target_core_group_ops->drop_item()
207 static void target_core_deregister_fabric(
208 struct config_group
*group
,
209 struct config_item
*item
)
211 struct target_fabric_configfs
*tf
= container_of(
212 to_config_group(item
), struct target_fabric_configfs
, tf_group
);
213 struct config_group
*tf_group
;
214 struct config_item
*df_item
;
217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
218 " tf list\n", config_item_name(item
));
220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
221 " %s\n", tf
->tf_name
);
222 atomic_dec(&tf
->tf_access_cnt
);
224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
225 " tf->tf_fabric for %s\n", tf
->tf_name
);
226 tf
->tf_fabric
= NULL
;
228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
229 " %s\n", config_item_name(item
));
231 tf_group
= &tf
->tf_group
;
232 for (i
= 0; tf_group
->default_groups
[i
]; i
++) {
233 df_item
= &tf_group
->default_groups
[i
]->cg_item
;
234 tf_group
->default_groups
[i
] = NULL
;
235 config_item_put(df_item
);
237 config_item_put(item
);
240 static struct configfs_group_operations target_core_fabric_group_ops
= {
241 .make_group
= &target_core_register_fabric
,
242 .drop_item
= &target_core_deregister_fabric
,
246 * All item attributes appearing in /sys/kernel/target/ appear here.
248 static struct configfs_attribute
*target_core_fabric_item_attrs
[] = {
249 &target_core_item_attr_version
,
254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
256 static struct config_item_type target_core_fabrics_item
= {
257 .ct_item_ops
= &target_core_fabric_item_ops
,
258 .ct_group_ops
= &target_core_fabric_group_ops
,
259 .ct_attrs
= target_core_fabric_item_attrs
,
260 .ct_owner
= THIS_MODULE
,
263 static struct configfs_subsystem target_core_fabrics
= {
266 .ci_namebuf
= "target",
267 .ci_type
= &target_core_fabrics_item
,
272 static struct configfs_subsystem
*target_core_subsystem
[] = {
273 &target_core_fabrics
,
277 /*##############################################################################
278 // Start functions called by external Target Fabrics Modules
279 //############################################################################*/
282 * First function called by fabric modules to:
284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285 * 2) Add struct target_fabric_configfs to g_tf_list
286 * 3) Return struct target_fabric_configfs to fabric module to be passed
287 * into target_fabric_configfs_register().
289 struct target_fabric_configfs
*target_fabric_configfs_init(
290 struct module
*fabric_mod
,
293 struct target_fabric_configfs
*tf
;
296 pr_err("Unable to locate passed fabric name\n");
297 return ERR_PTR(-EINVAL
);
299 if (strlen(name
) >= TARGET_FABRIC_NAME_SIZE
) {
300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
301 "_NAME_SIZE\n", name
);
302 return ERR_PTR(-EINVAL
);
305 tf
= kzalloc(sizeof(struct target_fabric_configfs
), GFP_KERNEL
);
307 return ERR_PTR(-ENOMEM
);
309 INIT_LIST_HEAD(&tf
->tf_list
);
310 atomic_set(&tf
->tf_access_cnt
, 0);
312 * Setup the default generic struct config_item_type's (cits) in
313 * struct target_fabric_configfs->tf_cit_tmpl
315 tf
->tf_module
= fabric_mod
;
316 target_fabric_setup_cits(tf
);
318 tf
->tf_subsys
= target_core_subsystem
[0];
319 snprintf(tf
->tf_name
, TARGET_FABRIC_NAME_SIZE
, "%s", name
);
321 mutex_lock(&g_tf_lock
);
322 list_add_tail(&tf
->tf_list
, &g_tf_list
);
323 mutex_unlock(&g_tf_lock
);
325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
327 pr_debug("Initialized struct target_fabric_configfs: %p for"
328 " %s\n", tf
, tf
->tf_name
);
331 EXPORT_SYMBOL(target_fabric_configfs_init
);
334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
336 void target_fabric_configfs_free(
337 struct target_fabric_configfs
*tf
)
339 mutex_lock(&g_tf_lock
);
340 list_del(&tf
->tf_list
);
341 mutex_unlock(&g_tf_lock
);
345 EXPORT_SYMBOL(target_fabric_configfs_free
);
348 * Perform a sanity check of the passed tf->tf_ops before completing
349 * TCM fabric module registration.
351 static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs
*tf
)
354 struct target_core_fabric_ops
*tfo
= &tf
->tf_ops
;
356 if (!tfo
->get_fabric_name
) {
357 pr_err("Missing tfo->get_fabric_name()\n");
360 if (!tfo
->get_fabric_proto_ident
) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
364 if (!tfo
->tpg_get_wwn
) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
368 if (!tfo
->tpg_get_tag
) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
372 if (!tfo
->tpg_get_default_depth
) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
376 if (!tfo
->tpg_get_pr_transport_id
) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
380 if (!tfo
->tpg_get_pr_transport_id_len
) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
384 if (!tfo
->tpg_check_demo_mode
) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
388 if (!tfo
->tpg_check_demo_mode_cache
) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
392 if (!tfo
->tpg_check_demo_mode_write_protect
) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
396 if (!tfo
->tpg_check_prod_mode_write_protect
) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
400 if (!tfo
->tpg_alloc_fabric_acl
) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
404 if (!tfo
->tpg_release_fabric_acl
) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
408 if (!tfo
->tpg_get_inst_index
) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
412 if (!tfo
->release_cmd
) {
413 pr_err("Missing tfo->release_cmd()\n");
416 if (!tfo
->shutdown_session
) {
417 pr_err("Missing tfo->shutdown_session()\n");
420 if (!tfo
->close_session
) {
421 pr_err("Missing tfo->close_session()\n");
424 if (!tfo
->sess_get_index
) {
425 pr_err("Missing tfo->sess_get_index()\n");
428 if (!tfo
->write_pending
) {
429 pr_err("Missing tfo->write_pending()\n");
432 if (!tfo
->write_pending_status
) {
433 pr_err("Missing tfo->write_pending_status()\n");
436 if (!tfo
->set_default_node_attributes
) {
437 pr_err("Missing tfo->set_default_node_attributes()\n");
440 if (!tfo
->get_task_tag
) {
441 pr_err("Missing tfo->get_task_tag()\n");
444 if (!tfo
->get_cmd_state
) {
445 pr_err("Missing tfo->get_cmd_state()\n");
448 if (!tfo
->queue_data_in
) {
449 pr_err("Missing tfo->queue_data_in()\n");
452 if (!tfo
->queue_status
) {
453 pr_err("Missing tfo->queue_status()\n");
456 if (!tfo
->queue_tm_rsp
) {
457 pr_err("Missing tfo->queue_tm_rsp()\n");
461 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
462 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
463 * target_core_fabric_configfs.c WWN+TPG group context code.
465 if (!tfo
->fabric_make_wwn
) {
466 pr_err("Missing tfo->fabric_make_wwn()\n");
469 if (!tfo
->fabric_drop_wwn
) {
470 pr_err("Missing tfo->fabric_drop_wwn()\n");
473 if (!tfo
->fabric_make_tpg
) {
474 pr_err("Missing tfo->fabric_make_tpg()\n");
477 if (!tfo
->fabric_drop_tpg
) {
478 pr_err("Missing tfo->fabric_drop_tpg()\n");
486 * Called 2nd from fabric module with returned parameter of
487 * struct target_fabric_configfs * from target_fabric_configfs_init().
489 * Upon a successful registration, the new fabric's struct config_item is
490 * return. Also, a pointer to this struct is set in the passed
491 * struct target_fabric_configfs.
493 int target_fabric_configfs_register(
494 struct target_fabric_configfs
*tf
)
499 pr_err("Unable to locate target_fabric_configfs"
503 if (!tf
->tf_subsys
) {
504 pr_err("Unable to target struct config_subsystem"
508 ret
= target_fabric_tf_ops_check(tf
);
512 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
516 EXPORT_SYMBOL(target_fabric_configfs_register
);
518 void target_fabric_configfs_deregister(
519 struct target_fabric_configfs
*tf
)
521 struct configfs_subsystem
*su
;
524 pr_err("Unable to locate passed target_fabric_"
530 pr_err("Unable to locate passed tf->tf_subsys"
534 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
536 mutex_lock(&g_tf_lock
);
537 if (atomic_read(&tf
->tf_access_cnt
)) {
538 mutex_unlock(&g_tf_lock
);
539 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
543 list_del(&tf
->tf_list
);
544 mutex_unlock(&g_tf_lock
);
546 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
547 " %s\n", tf
->tf_name
);
548 tf
->tf_module
= NULL
;
549 tf
->tf_subsys
= NULL
;
552 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
555 EXPORT_SYMBOL(target_fabric_configfs_deregister
);
557 /*##############################################################################
558 // Stop functions called by external Target Fabrics Modules
559 //############################################################################*/
561 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
563 #define DEF_DEV_ATTRIB_SHOW(_name) \
564 static ssize_t target_core_dev_show_attr_##_name( \
565 struct se_dev_attrib *da, \
568 struct se_device *dev; \
569 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
572 spin_lock(&se_dev->se_dev_lock); \
573 dev = se_dev->se_dev_ptr; \
575 spin_unlock(&se_dev->se_dev_lock); \
578 rb = snprintf(page, PAGE_SIZE, "%u\n", \
579 (u32)dev->se_sub_dev->se_dev_attrib._name); \
580 spin_unlock(&se_dev->se_dev_lock); \
585 #define DEF_DEV_ATTRIB_STORE(_name) \
586 static ssize_t target_core_dev_store_attr_##_name( \
587 struct se_dev_attrib *da, \
591 struct se_device *dev; \
592 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
596 spin_lock(&se_dev->se_dev_lock); \
597 dev = se_dev->se_dev_ptr; \
599 spin_unlock(&se_dev->se_dev_lock); \
602 ret = strict_strtoul(page, 0, &val); \
604 spin_unlock(&se_dev->se_dev_lock); \
605 pr_err("strict_strtoul() failed with" \
606 " ret: %d\n", ret); \
609 ret = se_dev_set_##_name(dev, (u32)val); \
610 spin_unlock(&se_dev->se_dev_lock); \
612 return (!ret) ? count : -EINVAL; \
615 #define DEF_DEV_ATTRIB(_name) \
616 DEF_DEV_ATTRIB_SHOW(_name); \
617 DEF_DEV_ATTRIB_STORE(_name);
619 #define DEF_DEV_ATTRIB_RO(_name) \
620 DEF_DEV_ATTRIB_SHOW(_name);
622 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib
, se_dev_attrib
);
623 #define SE_DEV_ATTR(_name, _mode) \
624 static struct target_core_dev_attrib_attribute \
625 target_core_dev_attrib_##_name = \
626 __CONFIGFS_EATTR(_name, _mode, \
627 target_core_dev_show_attr_##_name, \
628 target_core_dev_store_attr_##_name);
630 #define SE_DEV_ATTR_RO(_name); \
631 static struct target_core_dev_attrib_attribute \
632 target_core_dev_attrib_##_name = \
633 __CONFIGFS_EATTR_RO(_name, \
634 target_core_dev_show_attr_##_name);
636 DEF_DEV_ATTRIB(emulate_dpo
);
637 SE_DEV_ATTR(emulate_dpo
, S_IRUGO
| S_IWUSR
);
639 DEF_DEV_ATTRIB(emulate_fua_write
);
640 SE_DEV_ATTR(emulate_fua_write
, S_IRUGO
| S_IWUSR
);
642 DEF_DEV_ATTRIB(emulate_fua_read
);
643 SE_DEV_ATTR(emulate_fua_read
, S_IRUGO
| S_IWUSR
);
645 DEF_DEV_ATTRIB(emulate_write_cache
);
646 SE_DEV_ATTR(emulate_write_cache
, S_IRUGO
| S_IWUSR
);
648 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl
);
649 SE_DEV_ATTR(emulate_ua_intlck_ctrl
, S_IRUGO
| S_IWUSR
);
651 DEF_DEV_ATTRIB(emulate_tas
);
652 SE_DEV_ATTR(emulate_tas
, S_IRUGO
| S_IWUSR
);
654 DEF_DEV_ATTRIB(emulate_tpu
);
655 SE_DEV_ATTR(emulate_tpu
, S_IRUGO
| S_IWUSR
);
657 DEF_DEV_ATTRIB(emulate_tpws
);
658 SE_DEV_ATTR(emulate_tpws
, S_IRUGO
| S_IWUSR
);
660 DEF_DEV_ATTRIB(enforce_pr_isids
);
661 SE_DEV_ATTR(enforce_pr_isids
, S_IRUGO
| S_IWUSR
);
663 DEF_DEV_ATTRIB(is_nonrot
);
664 SE_DEV_ATTR(is_nonrot
, S_IRUGO
| S_IWUSR
);
666 DEF_DEV_ATTRIB(emulate_rest_reord
);
667 SE_DEV_ATTR(emulate_rest_reord
, S_IRUGO
| S_IWUSR
);
669 DEF_DEV_ATTRIB_RO(hw_block_size
);
670 SE_DEV_ATTR_RO(hw_block_size
);
672 DEF_DEV_ATTRIB(block_size
);
673 SE_DEV_ATTR(block_size
, S_IRUGO
| S_IWUSR
);
675 DEF_DEV_ATTRIB_RO(hw_max_sectors
);
676 SE_DEV_ATTR_RO(hw_max_sectors
);
678 DEF_DEV_ATTRIB(fabric_max_sectors
);
679 SE_DEV_ATTR(fabric_max_sectors
, S_IRUGO
| S_IWUSR
);
681 DEF_DEV_ATTRIB(optimal_sectors
);
682 SE_DEV_ATTR(optimal_sectors
, S_IRUGO
| S_IWUSR
);
684 DEF_DEV_ATTRIB_RO(hw_queue_depth
);
685 SE_DEV_ATTR_RO(hw_queue_depth
);
687 DEF_DEV_ATTRIB(queue_depth
);
688 SE_DEV_ATTR(queue_depth
, S_IRUGO
| S_IWUSR
);
690 DEF_DEV_ATTRIB(max_unmap_lba_count
);
691 SE_DEV_ATTR(max_unmap_lba_count
, S_IRUGO
| S_IWUSR
);
693 DEF_DEV_ATTRIB(max_unmap_block_desc_count
);
694 SE_DEV_ATTR(max_unmap_block_desc_count
, S_IRUGO
| S_IWUSR
);
696 DEF_DEV_ATTRIB(unmap_granularity
);
697 SE_DEV_ATTR(unmap_granularity
, S_IRUGO
| S_IWUSR
);
699 DEF_DEV_ATTRIB(unmap_granularity_alignment
);
700 SE_DEV_ATTR(unmap_granularity_alignment
, S_IRUGO
| S_IWUSR
);
702 CONFIGFS_EATTR_OPS(target_core_dev_attrib
, se_dev_attrib
, da_group
);
704 static struct configfs_attribute
*target_core_dev_attrib_attrs
[] = {
705 &target_core_dev_attrib_emulate_dpo
.attr
,
706 &target_core_dev_attrib_emulate_fua_write
.attr
,
707 &target_core_dev_attrib_emulate_fua_read
.attr
,
708 &target_core_dev_attrib_emulate_write_cache
.attr
,
709 &target_core_dev_attrib_emulate_ua_intlck_ctrl
.attr
,
710 &target_core_dev_attrib_emulate_tas
.attr
,
711 &target_core_dev_attrib_emulate_tpu
.attr
,
712 &target_core_dev_attrib_emulate_tpws
.attr
,
713 &target_core_dev_attrib_enforce_pr_isids
.attr
,
714 &target_core_dev_attrib_is_nonrot
.attr
,
715 &target_core_dev_attrib_emulate_rest_reord
.attr
,
716 &target_core_dev_attrib_hw_block_size
.attr
,
717 &target_core_dev_attrib_block_size
.attr
,
718 &target_core_dev_attrib_hw_max_sectors
.attr
,
719 &target_core_dev_attrib_fabric_max_sectors
.attr
,
720 &target_core_dev_attrib_optimal_sectors
.attr
,
721 &target_core_dev_attrib_hw_queue_depth
.attr
,
722 &target_core_dev_attrib_queue_depth
.attr
,
723 &target_core_dev_attrib_max_unmap_lba_count
.attr
,
724 &target_core_dev_attrib_max_unmap_block_desc_count
.attr
,
725 &target_core_dev_attrib_unmap_granularity
.attr
,
726 &target_core_dev_attrib_unmap_granularity_alignment
.attr
,
730 static struct configfs_item_operations target_core_dev_attrib_ops
= {
731 .show_attribute
= target_core_dev_attrib_attr_show
,
732 .store_attribute
= target_core_dev_attrib_attr_store
,
735 static struct config_item_type target_core_dev_attrib_cit
= {
736 .ct_item_ops
= &target_core_dev_attrib_ops
,
737 .ct_attrs
= target_core_dev_attrib_attrs
,
738 .ct_owner
= THIS_MODULE
,
741 /* End functions for struct config_item_type target_core_dev_attrib_cit */
743 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
745 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn
, t10_wwn
);
746 #define SE_DEV_WWN_ATTR(_name, _mode) \
747 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
748 __CONFIGFS_EATTR(_name, _mode, \
749 target_core_dev_wwn_show_attr_##_name, \
750 target_core_dev_wwn_store_attr_##_name);
752 #define SE_DEV_WWN_ATTR_RO(_name); \
754 static struct target_core_dev_wwn_attribute \
755 target_core_dev_wwn_##_name = \
756 __CONFIGFS_EATTR_RO(_name, \
757 target_core_dev_wwn_show_attr_##_name); \
761 * VPD page 0x80 Unit serial
763 static ssize_t
target_core_dev_wwn_show_attr_vpd_unit_serial(
764 struct t10_wwn
*t10_wwn
,
767 struct se_subsystem_dev
*se_dev
= t10_wwn
->t10_sub_dev
;
768 struct se_device
*dev
;
770 dev
= se_dev
->se_dev_ptr
;
774 return sprintf(page
, "T10 VPD Unit Serial Number: %s\n",
775 &t10_wwn
->unit_serial
[0]);
778 static ssize_t
target_core_dev_wwn_store_attr_vpd_unit_serial(
779 struct t10_wwn
*t10_wwn
,
783 struct se_subsystem_dev
*su_dev
= t10_wwn
->t10_sub_dev
;
784 struct se_device
*dev
;
785 unsigned char buf
[INQUIRY_VPD_SERIAL_LEN
];
788 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
789 * from the struct scsi_device level firmware, do not allow
790 * VPD Unit Serial to be emulated.
792 * Note this struct scsi_device could also be emulating VPD
793 * information from its drivers/scsi LLD. But for now we assume
794 * it is doing 'the right thing' wrt a world wide unique
795 * VPD Unit Serial Number that OS dependent multipath can depend on.
797 if (su_dev
->su_dev_flags
& SDF_FIRMWARE_VPD_UNIT_SERIAL
) {
798 pr_err("Underlying SCSI device firmware provided VPD"
799 " Unit Serial, ignoring request\n");
803 if (strlen(page
) >= INQUIRY_VPD_SERIAL_LEN
) {
804 pr_err("Emulated VPD Unit Serial exceeds"
805 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN
);
809 * Check to see if any active $FABRIC_MOD exports exist. If they
810 * do exist, fail here as changing this information on the fly
811 * (underneath the initiator side OS dependent multipath code)
812 * could cause negative effects.
814 dev
= su_dev
->se_dev_ptr
;
816 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
817 pr_err("Unable to set VPD Unit Serial while"
818 " active %d $FABRIC_MOD exports exist\n",
819 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
824 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
826 * Also, strip any newline added from the userspace
827 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
829 memset(buf
, 0, INQUIRY_VPD_SERIAL_LEN
);
830 snprintf(buf
, INQUIRY_VPD_SERIAL_LEN
, "%s", page
);
831 snprintf(su_dev
->t10_wwn
.unit_serial
, INQUIRY_VPD_SERIAL_LEN
,
832 "%s", strstrip(buf
));
833 su_dev
->su_dev_flags
|= SDF_EMULATED_VPD_UNIT_SERIAL
;
835 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
836 " %s\n", su_dev
->t10_wwn
.unit_serial
);
841 SE_DEV_WWN_ATTR(vpd_unit_serial
, S_IRUGO
| S_IWUSR
);
844 * VPD page 0x83 Protocol Identifier
846 static ssize_t
target_core_dev_wwn_show_attr_vpd_protocol_identifier(
847 struct t10_wwn
*t10_wwn
,
850 struct se_subsystem_dev
*se_dev
= t10_wwn
->t10_sub_dev
;
851 struct se_device
*dev
;
853 unsigned char buf
[VPD_TMP_BUF_SIZE
];
856 dev
= se_dev
->se_dev_ptr
;
860 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
862 spin_lock(&t10_wwn
->t10_vpd_lock
);
863 list_for_each_entry(vpd
, &t10_wwn
->t10_vpd_list
, vpd_list
) {
864 if (!vpd
->protocol_identifier_set
)
867 transport_dump_vpd_proto_id(vpd
, buf
, VPD_TMP_BUF_SIZE
);
869 if (len
+ strlen(buf
) >= PAGE_SIZE
)
872 len
+= sprintf(page
+len
, "%s", buf
);
874 spin_unlock(&t10_wwn
->t10_vpd_lock
);
879 static ssize_t
target_core_dev_wwn_store_attr_vpd_protocol_identifier(
880 struct t10_wwn
*t10_wwn
,
887 SE_DEV_WWN_ATTR(vpd_protocol_identifier
, S_IRUGO
| S_IWUSR
);
890 * Generic wrapper for dumping VPD identifiers by association.
892 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
893 static ssize_t target_core_dev_wwn_show_attr_##_name( \
894 struct t10_wwn *t10_wwn, \
897 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
898 struct se_device *dev; \
899 struct t10_vpd *vpd; \
900 unsigned char buf[VPD_TMP_BUF_SIZE]; \
903 dev = se_dev->se_dev_ptr; \
907 spin_lock(&t10_wwn->t10_vpd_lock); \
908 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
909 if (vpd->association != _assoc) \
912 memset(buf, 0, VPD_TMP_BUF_SIZE); \
913 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
914 if (len + strlen(buf) >= PAGE_SIZE) \
916 len += sprintf(page+len, "%s", buf); \
918 memset(buf, 0, VPD_TMP_BUF_SIZE); \
919 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
920 if (len + strlen(buf) >= PAGE_SIZE) \
922 len += sprintf(page+len, "%s", buf); \
924 memset(buf, 0, VPD_TMP_BUF_SIZE); \
925 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
926 if (len + strlen(buf) >= PAGE_SIZE) \
928 len += sprintf(page+len, "%s", buf); \
930 spin_unlock(&t10_wwn->t10_vpd_lock); \
936 * VPD page 0x83 Association: Logical Unit
938 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit
, 0x00);
940 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
941 struct t10_wwn
*t10_wwn
,
948 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit
, S_IRUGO
| S_IWUSR
);
951 * VPD page 0x83 Association: Target Port
953 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port
, 0x10);
955 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_target_port(
956 struct t10_wwn
*t10_wwn
,
963 SE_DEV_WWN_ATTR(vpd_assoc_target_port
, S_IRUGO
| S_IWUSR
);
966 * VPD page 0x83 Association: SCSI Target Device
968 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device
, 0x20);
970 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
971 struct t10_wwn
*t10_wwn
,
978 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device
, S_IRUGO
| S_IWUSR
);
980 CONFIGFS_EATTR_OPS(target_core_dev_wwn
, t10_wwn
, t10_wwn_group
);
982 static struct configfs_attribute
*target_core_dev_wwn_attrs
[] = {
983 &target_core_dev_wwn_vpd_unit_serial
.attr
,
984 &target_core_dev_wwn_vpd_protocol_identifier
.attr
,
985 &target_core_dev_wwn_vpd_assoc_logical_unit
.attr
,
986 &target_core_dev_wwn_vpd_assoc_target_port
.attr
,
987 &target_core_dev_wwn_vpd_assoc_scsi_target_device
.attr
,
991 static struct configfs_item_operations target_core_dev_wwn_ops
= {
992 .show_attribute
= target_core_dev_wwn_attr_show
,
993 .store_attribute
= target_core_dev_wwn_attr_store
,
996 static struct config_item_type target_core_dev_wwn_cit
= {
997 .ct_item_ops
= &target_core_dev_wwn_ops
,
998 .ct_attrs
= target_core_dev_wwn_attrs
,
999 .ct_owner
= THIS_MODULE
,
1002 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1004 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1006 CONFIGFS_EATTR_STRUCT(target_core_dev_pr
, se_subsystem_dev
);
1007 #define SE_DEV_PR_ATTR(_name, _mode) \
1008 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1009 __CONFIGFS_EATTR(_name, _mode, \
1010 target_core_dev_pr_show_attr_##_name, \
1011 target_core_dev_pr_store_attr_##_name);
1013 #define SE_DEV_PR_ATTR_RO(_name); \
1014 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1015 __CONFIGFS_EATTR_RO(_name, \
1016 target_core_dev_pr_show_attr_##_name);
1021 static ssize_t
target_core_dev_pr_show_spc3_res(
1022 struct se_device
*dev
,
1026 struct se_node_acl
*se_nacl
;
1027 struct t10_pr_registration
*pr_reg
;
1028 char i_buf
[PR_REG_ISID_ID_LEN
];
1031 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1033 spin_lock(&dev
->dev_reservation_lock
);
1034 pr_reg
= dev
->dev_pr_res_holder
;
1036 *len
+= sprintf(page
+ *len
, "No SPC-3 Reservation holder\n");
1037 spin_unlock(&dev
->dev_reservation_lock
);
1040 se_nacl
= pr_reg
->pr_reg_nacl
;
1041 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
1042 PR_REG_ISID_ID_LEN
);
1044 *len
+= sprintf(page
+ *len
, "SPC-3 Reservation: %s Initiator: %s%s\n",
1045 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1046 se_nacl
->initiatorname
, (prf_isid
) ? &i_buf
[0] : "");
1047 spin_unlock(&dev
->dev_reservation_lock
);
1052 static ssize_t
target_core_dev_pr_show_spc2_res(
1053 struct se_device
*dev
,
1057 struct se_node_acl
*se_nacl
;
1059 spin_lock(&dev
->dev_reservation_lock
);
1060 se_nacl
= dev
->dev_reserved_node_acl
;
1062 *len
+= sprintf(page
+ *len
, "No SPC-2 Reservation holder\n");
1063 spin_unlock(&dev
->dev_reservation_lock
);
1066 *len
+= sprintf(page
+ *len
, "SPC-2 Reservation: %s Initiator: %s\n",
1067 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1068 se_nacl
->initiatorname
);
1069 spin_unlock(&dev
->dev_reservation_lock
);
1074 static ssize_t
target_core_dev_pr_show_attr_res_holder(
1075 struct se_subsystem_dev
*su_dev
,
1080 if (!su_dev
->se_dev_ptr
)
1083 switch (su_dev
->t10_pr
.res_type
) {
1084 case SPC3_PERSISTENT_RESERVATIONS
:
1085 target_core_dev_pr_show_spc3_res(su_dev
->se_dev_ptr
,
1088 case SPC2_RESERVATIONS
:
1089 target_core_dev_pr_show_spc2_res(su_dev
->se_dev_ptr
,
1092 case SPC_PASSTHROUGH
:
1093 len
+= sprintf(page
+len
, "Passthrough\n");
1096 len
+= sprintf(page
+len
, "Unknown\n");
1103 SE_DEV_PR_ATTR_RO(res_holder
);
1106 * res_pr_all_tgt_pts
1108 static ssize_t
target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1109 struct se_subsystem_dev
*su_dev
,
1112 struct se_device
*dev
;
1113 struct t10_pr_registration
*pr_reg
;
1116 dev
= su_dev
->se_dev_ptr
;
1120 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1123 spin_lock(&dev
->dev_reservation_lock
);
1124 pr_reg
= dev
->dev_pr_res_holder
;
1126 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1127 spin_unlock(&dev
->dev_reservation_lock
);
1131 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1132 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1134 if (pr_reg
->pr_reg_all_tg_pt
)
1135 len
= sprintf(page
, "SPC-3 Reservation: All Target"
1136 " Ports registration\n");
1138 len
= sprintf(page
, "SPC-3 Reservation: Single"
1139 " Target Port registration\n");
1140 spin_unlock(&dev
->dev_reservation_lock
);
1145 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts
);
1150 static ssize_t
target_core_dev_pr_show_attr_res_pr_generation(
1151 struct se_subsystem_dev
*su_dev
,
1154 if (!su_dev
->se_dev_ptr
)
1157 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1160 return sprintf(page
, "0x%08x\n", su_dev
->t10_pr
.pr_generation
);
1163 SE_DEV_PR_ATTR_RO(res_pr_generation
);
1166 * res_pr_holder_tg_port
1168 static ssize_t
target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1169 struct se_subsystem_dev
*su_dev
,
1172 struct se_device
*dev
;
1173 struct se_node_acl
*se_nacl
;
1175 struct se_portal_group
*se_tpg
;
1176 struct t10_pr_registration
*pr_reg
;
1177 struct target_core_fabric_ops
*tfo
;
1180 dev
= su_dev
->se_dev_ptr
;
1184 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1187 spin_lock(&dev
->dev_reservation_lock
);
1188 pr_reg
= dev
->dev_pr_res_holder
;
1190 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1191 spin_unlock(&dev
->dev_reservation_lock
);
1194 se_nacl
= pr_reg
->pr_reg_nacl
;
1195 se_tpg
= se_nacl
->se_tpg
;
1196 lun
= pr_reg
->pr_reg_tg_pt_lun
;
1197 tfo
= se_tpg
->se_tpg_tfo
;
1199 len
+= sprintf(page
+len
, "SPC-3 Reservation: %s"
1200 " Target Node Endpoint: %s\n", tfo
->get_fabric_name(),
1201 tfo
->tpg_get_wwn(se_tpg
));
1202 len
+= sprintf(page
+len
, "SPC-3 Reservation: Relative Port"
1203 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1204 " %s Logical Unit: %u\n", lun
->lun_sep
->sep_rtpi
,
1205 tfo
->get_fabric_name(), tfo
->tpg_get_tag(se_tpg
),
1206 tfo
->get_fabric_name(), lun
->unpacked_lun
);
1207 spin_unlock(&dev
->dev_reservation_lock
);
1212 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port
);
1215 * res_pr_registered_i_pts
1217 static ssize_t
target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1218 struct se_subsystem_dev
*su_dev
,
1221 struct target_core_fabric_ops
*tfo
;
1222 struct t10_pr_registration
*pr_reg
;
1223 unsigned char buf
[384];
1224 char i_buf
[PR_REG_ISID_ID_LEN
];
1226 int reg_count
= 0, prf_isid
;
1228 if (!su_dev
->se_dev_ptr
)
1231 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1234 len
+= sprintf(page
+len
, "SPC-3 PR Registrations:\n");
1236 spin_lock(&su_dev
->t10_pr
.registration_lock
);
1237 list_for_each_entry(pr_reg
, &su_dev
->t10_pr
.registration_list
,
1240 memset(buf
, 0, 384);
1241 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1242 tfo
= pr_reg
->pr_reg_nacl
->se_tpg
->se_tpg_tfo
;
1243 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
1244 PR_REG_ISID_ID_LEN
);
1245 sprintf(buf
, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1246 tfo
->get_fabric_name(),
1247 pr_reg
->pr_reg_nacl
->initiatorname
, (prf_isid
) ?
1248 &i_buf
[0] : "", pr_reg
->pr_res_key
,
1249 pr_reg
->pr_res_generation
);
1251 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1254 len
+= sprintf(page
+len
, "%s", buf
);
1257 spin_unlock(&su_dev
->t10_pr
.registration_lock
);
1260 len
+= sprintf(page
+len
, "None\n");
1265 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts
);
1270 static ssize_t
target_core_dev_pr_show_attr_res_pr_type(
1271 struct se_subsystem_dev
*su_dev
,
1274 struct se_device
*dev
;
1275 struct t10_pr_registration
*pr_reg
;
1278 dev
= su_dev
->se_dev_ptr
;
1282 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1285 spin_lock(&dev
->dev_reservation_lock
);
1286 pr_reg
= dev
->dev_pr_res_holder
;
1288 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1289 spin_unlock(&dev
->dev_reservation_lock
);
1292 len
= sprintf(page
, "SPC-3 Reservation Type: %s\n",
1293 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
));
1294 spin_unlock(&dev
->dev_reservation_lock
);
1299 SE_DEV_PR_ATTR_RO(res_pr_type
);
1304 static ssize_t
target_core_dev_pr_show_attr_res_type(
1305 struct se_subsystem_dev
*su_dev
,
1310 if (!su_dev
->se_dev_ptr
)
1313 switch (su_dev
->t10_pr
.res_type
) {
1314 case SPC3_PERSISTENT_RESERVATIONS
:
1315 len
= sprintf(page
, "SPC3_PERSISTENT_RESERVATIONS\n");
1317 case SPC2_RESERVATIONS
:
1318 len
= sprintf(page
, "SPC2_RESERVATIONS\n");
1320 case SPC_PASSTHROUGH
:
1321 len
= sprintf(page
, "SPC_PASSTHROUGH\n");
1324 len
= sprintf(page
, "UNKNOWN\n");
1331 SE_DEV_PR_ATTR_RO(res_type
);
1337 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_active(
1338 struct se_subsystem_dev
*su_dev
,
1341 if (!su_dev
->se_dev_ptr
)
1344 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1347 return sprintf(page
, "APTPL Bit Status: %s\n",
1348 (su_dev
->t10_pr
.pr_aptpl_active
) ? "Activated" : "Disabled");
1351 SE_DEV_PR_ATTR_RO(res_aptpl_active
);
1354 * res_aptpl_metadata
1356 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_metadata(
1357 struct se_subsystem_dev
*su_dev
,
1360 if (!su_dev
->se_dev_ptr
)
1363 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1366 return sprintf(page
, "Ready to process PR APTPL metadata..\n");
1370 Opt_initiator_fabric
, Opt_initiator_node
, Opt_initiator_sid
,
1371 Opt_sa_res_key
, Opt_res_holder
, Opt_res_type
, Opt_res_scope
,
1372 Opt_res_all_tg_pt
, Opt_mapped_lun
, Opt_target_fabric
,
1373 Opt_target_node
, Opt_tpgt
, Opt_port_rtpi
, Opt_target_lun
, Opt_err
1376 static match_table_t tokens
= {
1377 {Opt_initiator_fabric
, "initiator_fabric=%s"},
1378 {Opt_initiator_node
, "initiator_node=%s"},
1379 {Opt_initiator_sid
, "initiator_sid=%s"},
1380 {Opt_sa_res_key
, "sa_res_key=%s"},
1381 {Opt_res_holder
, "res_holder=%d"},
1382 {Opt_res_type
, "res_type=%d"},
1383 {Opt_res_scope
, "res_scope=%d"},
1384 {Opt_res_all_tg_pt
, "res_all_tg_pt=%d"},
1385 {Opt_mapped_lun
, "mapped_lun=%d"},
1386 {Opt_target_fabric
, "target_fabric=%s"},
1387 {Opt_target_node
, "target_node=%s"},
1388 {Opt_tpgt
, "tpgt=%d"},
1389 {Opt_port_rtpi
, "port_rtpi=%d"},
1390 {Opt_target_lun
, "target_lun=%d"},
1394 static ssize_t
target_core_dev_pr_store_attr_res_aptpl_metadata(
1395 struct se_subsystem_dev
*su_dev
,
1399 struct se_device
*dev
;
1400 unsigned char *i_fabric
= NULL
, *i_port
= NULL
, *isid
= NULL
;
1401 unsigned char *t_fabric
= NULL
, *t_port
= NULL
;
1402 char *orig
, *ptr
, *arg_p
, *opts
;
1403 substring_t args
[MAX_OPT_ARGS
];
1404 unsigned long long tmp_ll
;
1406 u32 mapped_lun
= 0, target_lun
= 0;
1407 int ret
= -1, res_holder
= 0, all_tg_pt
= 0, arg
, token
;
1408 u16 port_rpti
= 0, tpgt
= 0;
1411 dev
= su_dev
->se_dev_ptr
;
1415 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
1418 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1419 pr_debug("Unable to process APTPL metadata while"
1420 " active fabric exports exist\n");
1424 opts
= kstrdup(page
, GFP_KERNEL
);
1429 while ((ptr
= strsep(&opts
, ",\n")) != NULL
) {
1433 token
= match_token(ptr
, tokens
, args
);
1435 case Opt_initiator_fabric
:
1436 i_fabric
= match_strdup(&args
[0]);
1442 case Opt_initiator_node
:
1443 i_port
= match_strdup(&args
[0]);
1448 if (strlen(i_port
) >= PR_APTPL_MAX_IPORT_LEN
) {
1449 pr_err("APTPL metadata initiator_node="
1450 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1451 PR_APTPL_MAX_IPORT_LEN
);
1456 case Opt_initiator_sid
:
1457 isid
= match_strdup(&args
[0]);
1462 if (strlen(isid
) >= PR_REG_ISID_LEN
) {
1463 pr_err("APTPL metadata initiator_isid"
1464 "= exceeds PR_REG_ISID_LEN: %d\n",
1470 case Opt_sa_res_key
:
1471 arg_p
= match_strdup(&args
[0]);
1476 ret
= strict_strtoull(arg_p
, 0, &tmp_ll
);
1478 pr_err("strict_strtoull() failed for"
1482 sa_res_key
= (u64
)tmp_ll
;
1485 * PR APTPL Metadata for Reservation
1487 case Opt_res_holder
:
1488 match_int(args
, &arg
);
1492 match_int(args
, &arg
);
1496 match_int(args
, &arg
);
1499 case Opt_res_all_tg_pt
:
1500 match_int(args
, &arg
);
1501 all_tg_pt
= (int)arg
;
1503 case Opt_mapped_lun
:
1504 match_int(args
, &arg
);
1505 mapped_lun
= (u32
)arg
;
1508 * PR APTPL Metadata for Target Port
1510 case Opt_target_fabric
:
1511 t_fabric
= match_strdup(&args
[0]);
1517 case Opt_target_node
:
1518 t_port
= match_strdup(&args
[0]);
1523 if (strlen(t_port
) >= PR_APTPL_MAX_TPORT_LEN
) {
1524 pr_err("APTPL metadata target_node="
1525 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1526 PR_APTPL_MAX_TPORT_LEN
);
1532 match_int(args
, &arg
);
1536 match_int(args
, &arg
);
1537 port_rpti
= (u16
)arg
;
1539 case Opt_target_lun
:
1540 match_int(args
, &arg
);
1541 target_lun
= (u32
)arg
;
1548 if (!i_port
|| !t_port
|| !sa_res_key
) {
1549 pr_err("Illegal parameters for APTPL registration\n");
1554 if (res_holder
&& !(type
)) {
1555 pr_err("Illegal PR type: 0x%02x for reservation"
1561 ret
= core_scsi3_alloc_aptpl_registration(&su_dev
->t10_pr
, sa_res_key
,
1562 i_port
, isid
, mapped_lun
, t_port
, tpgt
, target_lun
,
1563 res_holder
, all_tg_pt
, type
);
1571 return (ret
== 0) ? count
: ret
;
1574 SE_DEV_PR_ATTR(res_aptpl_metadata
, S_IRUGO
| S_IWUSR
);
1576 CONFIGFS_EATTR_OPS(target_core_dev_pr
, se_subsystem_dev
, se_dev_pr_group
);
1578 static struct configfs_attribute
*target_core_dev_pr_attrs
[] = {
1579 &target_core_dev_pr_res_holder
.attr
,
1580 &target_core_dev_pr_res_pr_all_tgt_pts
.attr
,
1581 &target_core_dev_pr_res_pr_generation
.attr
,
1582 &target_core_dev_pr_res_pr_holder_tg_port
.attr
,
1583 &target_core_dev_pr_res_pr_registered_i_pts
.attr
,
1584 &target_core_dev_pr_res_pr_type
.attr
,
1585 &target_core_dev_pr_res_type
.attr
,
1586 &target_core_dev_pr_res_aptpl_active
.attr
,
1587 &target_core_dev_pr_res_aptpl_metadata
.attr
,
1591 static struct configfs_item_operations target_core_dev_pr_ops
= {
1592 .show_attribute
= target_core_dev_pr_attr_show
,
1593 .store_attribute
= target_core_dev_pr_attr_store
,
1596 static struct config_item_type target_core_dev_pr_cit
= {
1597 .ct_item_ops
= &target_core_dev_pr_ops
,
1598 .ct_attrs
= target_core_dev_pr_attrs
,
1599 .ct_owner
= THIS_MODULE
,
1602 /* End functions for struct config_item_type target_core_dev_pr_cit */
1604 /* Start functions for struct config_item_type target_core_dev_cit */
1606 static ssize_t
target_core_show_dev_info(void *p
, char *page
)
1608 struct se_subsystem_dev
*se_dev
= p
;
1609 struct se_hba
*hba
= se_dev
->se_dev_hba
;
1610 struct se_subsystem_api
*t
= hba
->transport
;
1612 ssize_t read_bytes
= 0;
1614 if (!se_dev
->se_dev_ptr
)
1617 transport_dump_dev_state(se_dev
->se_dev_ptr
, page
, &bl
);
1619 read_bytes
+= t
->show_configfs_dev_params(hba
, se_dev
, page
+read_bytes
);
1623 static struct target_core_configfs_attribute target_core_attr_dev_info
= {
1624 .attr
= { .ca_owner
= THIS_MODULE
,
1626 .ca_mode
= S_IRUGO
},
1627 .show
= target_core_show_dev_info
,
1631 static ssize_t
target_core_store_dev_control(
1636 struct se_subsystem_dev
*se_dev
= p
;
1637 struct se_hba
*hba
= se_dev
->se_dev_hba
;
1638 struct se_subsystem_api
*t
= hba
->transport
;
1640 if (!se_dev
->se_dev_su_ptr
) {
1641 pr_err("Unable to locate struct se_subsystem_dev>se"
1646 return t
->set_configfs_dev_params(hba
, se_dev
, page
, count
);
1649 static struct target_core_configfs_attribute target_core_attr_dev_control
= {
1650 .attr
= { .ca_owner
= THIS_MODULE
,
1651 .ca_name
= "control",
1652 .ca_mode
= S_IWUSR
},
1654 .store
= target_core_store_dev_control
,
1657 static ssize_t
target_core_show_dev_alias(void *p
, char *page
)
1659 struct se_subsystem_dev
*se_dev
= p
;
1661 if (!(se_dev
->su_dev_flags
& SDF_USING_ALIAS
))
1664 return snprintf(page
, PAGE_SIZE
, "%s\n", se_dev
->se_dev_alias
);
1667 static ssize_t
target_core_store_dev_alias(
1672 struct se_subsystem_dev
*se_dev
= p
;
1673 struct se_hba
*hba
= se_dev
->se_dev_hba
;
1676 if (count
> (SE_DEV_ALIAS_LEN
-1)) {
1677 pr_err("alias count: %d exceeds"
1678 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count
,
1679 SE_DEV_ALIAS_LEN
-1);
1683 read_bytes
= snprintf(&se_dev
->se_dev_alias
[0], SE_DEV_ALIAS_LEN
,
1687 if (se_dev
->se_dev_alias
[read_bytes
- 1] == '\n')
1688 se_dev
->se_dev_alias
[read_bytes
- 1] = '\0';
1690 se_dev
->su_dev_flags
|= SDF_USING_ALIAS
;
1692 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1693 config_item_name(&hba
->hba_group
.cg_item
),
1694 config_item_name(&se_dev
->se_dev_group
.cg_item
),
1695 se_dev
->se_dev_alias
);
1700 static struct target_core_configfs_attribute target_core_attr_dev_alias
= {
1701 .attr
= { .ca_owner
= THIS_MODULE
,
1703 .ca_mode
= S_IRUGO
| S_IWUSR
},
1704 .show
= target_core_show_dev_alias
,
1705 .store
= target_core_store_dev_alias
,
1708 static ssize_t
target_core_show_dev_udev_path(void *p
, char *page
)
1710 struct se_subsystem_dev
*se_dev
= p
;
1712 if (!(se_dev
->su_dev_flags
& SDF_USING_UDEV_PATH
))
1715 return snprintf(page
, PAGE_SIZE
, "%s\n", se_dev
->se_dev_udev_path
);
1718 static ssize_t
target_core_store_dev_udev_path(
1723 struct se_subsystem_dev
*se_dev
= p
;
1724 struct se_hba
*hba
= se_dev
->se_dev_hba
;
1727 if (count
> (SE_UDEV_PATH_LEN
-1)) {
1728 pr_err("udev_path count: %d exceeds"
1729 " SE_UDEV_PATH_LEN-1: %u\n", (int)count
,
1730 SE_UDEV_PATH_LEN
-1);
1734 read_bytes
= snprintf(&se_dev
->se_dev_udev_path
[0], SE_UDEV_PATH_LEN
,
1738 if (se_dev
->se_dev_udev_path
[read_bytes
- 1] == '\n')
1739 se_dev
->se_dev_udev_path
[read_bytes
- 1] = '\0';
1741 se_dev
->su_dev_flags
|= SDF_USING_UDEV_PATH
;
1743 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1744 config_item_name(&hba
->hba_group
.cg_item
),
1745 config_item_name(&se_dev
->se_dev_group
.cg_item
),
1746 se_dev
->se_dev_udev_path
);
1751 static struct target_core_configfs_attribute target_core_attr_dev_udev_path
= {
1752 .attr
= { .ca_owner
= THIS_MODULE
,
1753 .ca_name
= "udev_path",
1754 .ca_mode
= S_IRUGO
| S_IWUSR
},
1755 .show
= target_core_show_dev_udev_path
,
1756 .store
= target_core_store_dev_udev_path
,
1759 static ssize_t
target_core_store_dev_enable(
1764 struct se_subsystem_dev
*se_dev
= p
;
1765 struct se_device
*dev
;
1766 struct se_hba
*hba
= se_dev
->se_dev_hba
;
1767 struct se_subsystem_api
*t
= hba
->transport
;
1770 ptr
= strstr(page
, "1");
1772 pr_err("For dev_enable ops, only valid value"
1776 if (se_dev
->se_dev_ptr
) {
1777 pr_err("se_dev->se_dev_ptr already set for storage"
1782 if (t
->check_configfs_dev_params(hba
, se_dev
) < 0)
1785 dev
= t
->create_virtdevice(hba
, se_dev
, se_dev
->se_dev_su_ptr
);
1787 return PTR_ERR(dev
);
1791 se_dev
->se_dev_ptr
= dev
;
1792 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1793 " %p\n", se_dev
->se_dev_ptr
);
1798 static struct target_core_configfs_attribute target_core_attr_dev_enable
= {
1799 .attr
= { .ca_owner
= THIS_MODULE
,
1800 .ca_name
= "enable",
1801 .ca_mode
= S_IWUSR
},
1803 .store
= target_core_store_dev_enable
,
1806 static ssize_t
target_core_show_alua_lu_gp(void *p
, char *page
)
1808 struct se_device
*dev
;
1809 struct se_subsystem_dev
*su_dev
= p
;
1810 struct config_item
*lu_ci
;
1811 struct t10_alua_lu_gp
*lu_gp
;
1812 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1815 dev
= su_dev
->se_dev_ptr
;
1819 if (su_dev
->t10_alua
.alua_type
!= SPC3_ALUA_EMULATED
)
1822 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1824 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1829 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1830 lu_gp
= lu_gp_mem
->lu_gp
;
1832 lu_ci
= &lu_gp
->lu_gp_group
.cg_item
;
1833 len
+= sprintf(page
, "LU Group Alias: %s\nLU Group ID: %hu\n",
1834 config_item_name(lu_ci
), lu_gp
->lu_gp_id
);
1836 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1841 static ssize_t
target_core_store_alua_lu_gp(
1846 struct se_device
*dev
;
1847 struct se_subsystem_dev
*su_dev
= p
;
1848 struct se_hba
*hba
= su_dev
->se_dev_hba
;
1849 struct t10_alua_lu_gp
*lu_gp
= NULL
, *lu_gp_new
= NULL
;
1850 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1851 unsigned char buf
[LU_GROUP_NAME_BUF
];
1854 dev
= su_dev
->se_dev_ptr
;
1858 if (su_dev
->t10_alua
.alua_type
!= SPC3_ALUA_EMULATED
) {
1859 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1860 config_item_name(&hba
->hba_group
.cg_item
),
1861 config_item_name(&su_dev
->se_dev_group
.cg_item
));
1864 if (count
> LU_GROUP_NAME_BUF
) {
1865 pr_err("ALUA LU Group Alias too large!\n");
1868 memset(buf
, 0, LU_GROUP_NAME_BUF
);
1869 memcpy(buf
, page
, count
);
1871 * Any ALUA logical unit alias besides "NULL" means we will be
1872 * making a new group association.
1874 if (strcmp(strstrip(buf
), "NULL")) {
1876 * core_alua_get_lu_gp_by_name() will increment reference to
1877 * struct t10_alua_lu_gp. This reference is released with
1878 * core_alua_get_lu_gp_by_name below().
1880 lu_gp_new
= core_alua_get_lu_gp_by_name(strstrip(buf
));
1884 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1887 core_alua_put_lu_gp_from_name(lu_gp_new
);
1888 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1893 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1894 lu_gp
= lu_gp_mem
->lu_gp
;
1897 * Clearing an existing lu_gp association, and replacing
1901 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1902 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1904 config_item_name(&hba
->hba_group
.cg_item
),
1905 config_item_name(&su_dev
->se_dev_group
.cg_item
),
1906 config_item_name(&lu_gp
->lu_gp_group
.cg_item
),
1909 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1910 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1915 * Removing existing association of lu_gp_mem with lu_gp
1917 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1921 * Associate lu_gp_mem with lu_gp_new.
1923 __core_alua_attach_lu_gp_mem(lu_gp_mem
, lu_gp_new
);
1924 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1926 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1927 " core/alua/lu_gps/%s, ID: %hu\n",
1928 (move
) ? "Moving" : "Adding",
1929 config_item_name(&hba
->hba_group
.cg_item
),
1930 config_item_name(&su_dev
->se_dev_group
.cg_item
),
1931 config_item_name(&lu_gp_new
->lu_gp_group
.cg_item
),
1932 lu_gp_new
->lu_gp_id
);
1934 core_alua_put_lu_gp_from_name(lu_gp_new
);
1938 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp
= {
1939 .attr
= { .ca_owner
= THIS_MODULE
,
1940 .ca_name
= "alua_lu_gp",
1941 .ca_mode
= S_IRUGO
| S_IWUSR
},
1942 .show
= target_core_show_alua_lu_gp
,
1943 .store
= target_core_store_alua_lu_gp
,
1946 static struct configfs_attribute
*lio_core_dev_attrs
[] = {
1947 &target_core_attr_dev_info
.attr
,
1948 &target_core_attr_dev_control
.attr
,
1949 &target_core_attr_dev_alias
.attr
,
1950 &target_core_attr_dev_udev_path
.attr
,
1951 &target_core_attr_dev_enable
.attr
,
1952 &target_core_attr_dev_alua_lu_gp
.attr
,
1956 static void target_core_dev_release(struct config_item
*item
)
1958 struct se_subsystem_dev
*se_dev
= container_of(to_config_group(item
),
1959 struct se_subsystem_dev
, se_dev_group
);
1960 struct se_hba
*hba
= item_to_hba(&se_dev
->se_dev_hba
->hba_group
.cg_item
);
1961 struct se_subsystem_api
*t
= hba
->transport
;
1962 struct config_group
*dev_cg
= &se_dev
->se_dev_group
;
1964 kfree(dev_cg
->default_groups
);
1966 * This pointer will set when the storage is enabled with:
1967 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1969 if (se_dev
->se_dev_ptr
) {
1970 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1971 "virtual_device() for se_dev_ptr: %p\n",
1972 se_dev
->se_dev_ptr
);
1974 se_free_virtual_device(se_dev
->se_dev_ptr
, hba
);
1977 * Release struct se_subsystem_dev->se_dev_su_ptr..
1979 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1980 "device() for se_dev_su_ptr: %p\n",
1981 se_dev
->se_dev_su_ptr
);
1983 t
->free_device(se_dev
->se_dev_su_ptr
);
1986 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
1987 "_dev_t: %p\n", se_dev
);
1991 static ssize_t
target_core_dev_show(struct config_item
*item
,
1992 struct configfs_attribute
*attr
,
1995 struct se_subsystem_dev
*se_dev
= container_of(
1996 to_config_group(item
), struct se_subsystem_dev
,
1998 struct target_core_configfs_attribute
*tc_attr
= container_of(
1999 attr
, struct target_core_configfs_attribute
, attr
);
2004 return tc_attr
->show(se_dev
, page
);
2007 static ssize_t
target_core_dev_store(struct config_item
*item
,
2008 struct configfs_attribute
*attr
,
2009 const char *page
, size_t count
)
2011 struct se_subsystem_dev
*se_dev
= container_of(
2012 to_config_group(item
), struct se_subsystem_dev
,
2014 struct target_core_configfs_attribute
*tc_attr
= container_of(
2015 attr
, struct target_core_configfs_attribute
, attr
);
2017 if (!tc_attr
->store
)
2020 return tc_attr
->store(se_dev
, page
, count
);
2023 static struct configfs_item_operations target_core_dev_item_ops
= {
2024 .release
= target_core_dev_release
,
2025 .show_attribute
= target_core_dev_show
,
2026 .store_attribute
= target_core_dev_store
,
2029 static struct config_item_type target_core_dev_cit
= {
2030 .ct_item_ops
= &target_core_dev_item_ops
,
2031 .ct_attrs
= lio_core_dev_attrs
,
2032 .ct_owner
= THIS_MODULE
,
2035 /* End functions for struct config_item_type target_core_dev_cit */
2037 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2039 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp
, t10_alua_lu_gp
);
2040 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2041 static struct target_core_alua_lu_gp_attribute \
2042 target_core_alua_lu_gp_##_name = \
2043 __CONFIGFS_EATTR(_name, _mode, \
2044 target_core_alua_lu_gp_show_attr_##_name, \
2045 target_core_alua_lu_gp_store_attr_##_name);
2047 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2048 static struct target_core_alua_lu_gp_attribute \
2049 target_core_alua_lu_gp_##_name = \
2050 __CONFIGFS_EATTR_RO(_name, \
2051 target_core_alua_lu_gp_show_attr_##_name);
2056 static ssize_t
target_core_alua_lu_gp_show_attr_lu_gp_id(
2057 struct t10_alua_lu_gp
*lu_gp
,
2060 if (!lu_gp
->lu_gp_valid_id
)
2063 return sprintf(page
, "%hu\n", lu_gp
->lu_gp_id
);
2066 static ssize_t
target_core_alua_lu_gp_store_attr_lu_gp_id(
2067 struct t10_alua_lu_gp
*lu_gp
,
2071 struct config_group
*alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2072 unsigned long lu_gp_id
;
2075 ret
= strict_strtoul(page
, 0, &lu_gp_id
);
2077 pr_err("strict_strtoul() returned %d for"
2078 " lu_gp_id\n", ret
);
2081 if (lu_gp_id
> 0x0000ffff) {
2082 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2083 " 0x0000ffff\n", lu_gp_id
);
2087 ret
= core_alua_set_lu_gp_id(lu_gp
, (u16
)lu_gp_id
);
2091 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2092 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2093 config_item_name(&alua_lu_gp_cg
->cg_item
),
2099 SE_DEV_ALUA_LU_ATTR(lu_gp_id
, S_IRUGO
| S_IWUSR
);
2104 static ssize_t
target_core_alua_lu_gp_show_attr_members(
2105 struct t10_alua_lu_gp
*lu_gp
,
2108 struct se_device
*dev
;
2110 struct se_subsystem_dev
*su_dev
;
2111 struct t10_alua_lu_gp_member
*lu_gp_mem
;
2112 ssize_t len
= 0, cur_len
;
2113 unsigned char buf
[LU_GROUP_NAME_BUF
];
2115 memset(buf
, 0, LU_GROUP_NAME_BUF
);
2117 spin_lock(&lu_gp
->lu_gp_lock
);
2118 list_for_each_entry(lu_gp_mem
, &lu_gp
->lu_gp_mem_list
, lu_gp_mem_list
) {
2119 dev
= lu_gp_mem
->lu_gp_mem_dev
;
2120 su_dev
= dev
->se_sub_dev
;
2121 hba
= su_dev
->se_dev_hba
;
2123 cur_len
= snprintf(buf
, LU_GROUP_NAME_BUF
, "%s/%s\n",
2124 config_item_name(&hba
->hba_group
.cg_item
),
2125 config_item_name(&su_dev
->se_dev_group
.cg_item
));
2126 cur_len
++; /* Extra byte for NULL terminator */
2128 if ((cur_len
+ len
) > PAGE_SIZE
) {
2129 pr_warn("Ran out of lu_gp_show_attr"
2130 "_members buffer\n");
2133 memcpy(page
+len
, buf
, cur_len
);
2136 spin_unlock(&lu_gp
->lu_gp_lock
);
2141 SE_DEV_ALUA_LU_ATTR_RO(members
);
2143 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp
, t10_alua_lu_gp
, lu_gp_group
);
2145 static struct configfs_attribute
*target_core_alua_lu_gp_attrs
[] = {
2146 &target_core_alua_lu_gp_lu_gp_id
.attr
,
2147 &target_core_alua_lu_gp_members
.attr
,
2151 static void target_core_alua_lu_gp_release(struct config_item
*item
)
2153 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2154 struct t10_alua_lu_gp
, lu_gp_group
);
2156 core_alua_free_lu_gp(lu_gp
);
2159 static struct configfs_item_operations target_core_alua_lu_gp_ops
= {
2160 .release
= target_core_alua_lu_gp_release
,
2161 .show_attribute
= target_core_alua_lu_gp_attr_show
,
2162 .store_attribute
= target_core_alua_lu_gp_attr_store
,
2165 static struct config_item_type target_core_alua_lu_gp_cit
= {
2166 .ct_item_ops
= &target_core_alua_lu_gp_ops
,
2167 .ct_attrs
= target_core_alua_lu_gp_attrs
,
2168 .ct_owner
= THIS_MODULE
,
2171 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2173 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2175 static struct config_group
*target_core_alua_create_lu_gp(
2176 struct config_group
*group
,
2179 struct t10_alua_lu_gp
*lu_gp
;
2180 struct config_group
*alua_lu_gp_cg
= NULL
;
2181 struct config_item
*alua_lu_gp_ci
= NULL
;
2183 lu_gp
= core_alua_allocate_lu_gp(name
, 0);
2187 alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
2188 alua_lu_gp_ci
= &alua_lu_gp_cg
->cg_item
;
2190 config_group_init_type_name(alua_lu_gp_cg
, name
,
2191 &target_core_alua_lu_gp_cit
);
2193 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2194 " Group: core/alua/lu_gps/%s\n",
2195 config_item_name(alua_lu_gp_ci
));
2197 return alua_lu_gp_cg
;
2201 static void target_core_alua_drop_lu_gp(
2202 struct config_group
*group
,
2203 struct config_item
*item
)
2205 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
2206 struct t10_alua_lu_gp
, lu_gp_group
);
2208 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2209 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2210 config_item_name(item
), lu_gp
->lu_gp_id
);
2212 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2213 * -> target_core_alua_lu_gp_release()
2215 config_item_put(item
);
2218 static struct configfs_group_operations target_core_alua_lu_gps_group_ops
= {
2219 .make_group
= &target_core_alua_create_lu_gp
,
2220 .drop_item
= &target_core_alua_drop_lu_gp
,
2223 static struct config_item_type target_core_alua_lu_gps_cit
= {
2224 .ct_item_ops
= NULL
,
2225 .ct_group_ops
= &target_core_alua_lu_gps_group_ops
,
2226 .ct_owner
= THIS_MODULE
,
2229 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2231 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2233 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
);
2234 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2235 static struct target_core_alua_tg_pt_gp_attribute \
2236 target_core_alua_tg_pt_gp_##_name = \
2237 __CONFIGFS_EATTR(_name, _mode, \
2238 target_core_alua_tg_pt_gp_show_attr_##_name, \
2239 target_core_alua_tg_pt_gp_store_attr_##_name);
2241 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2242 static struct target_core_alua_tg_pt_gp_attribute \
2243 target_core_alua_tg_pt_gp_##_name = \
2244 __CONFIGFS_EATTR_RO(_name, \
2245 target_core_alua_tg_pt_gp_show_attr_##_name);
2250 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2251 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2254 return sprintf(page
, "%d\n",
2255 atomic_read(&tg_pt_gp
->tg_pt_gp_alua_access_state
));
2258 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2259 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2263 struct se_subsystem_dev
*su_dev
= tg_pt_gp
->tg_pt_gp_su_dev
;
2267 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2268 pr_err("Unable to do implict ALUA on non valid"
2269 " tg_pt_gp ID: %hu\n", tg_pt_gp
->tg_pt_gp_valid_id
);
2273 ret
= strict_strtoul(page
, 0, &tmp
);
2275 pr_err("Unable to extract new ALUA access state from"
2279 new_state
= (int)tmp
;
2281 if (!(tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_IMPLICT_ALUA
)) {
2282 pr_err("Unable to process implict configfs ALUA"
2283 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2287 ret
= core_alua_do_port_transition(tg_pt_gp
, su_dev
->se_dev_ptr
,
2288 NULL
, NULL
, new_state
, 0);
2289 return (!ret
) ? count
: -EINVAL
;
2292 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state
, S_IRUGO
| S_IWUSR
);
2295 * alua_access_status
2297 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2298 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2301 return sprintf(page
, "%s\n",
2302 core_alua_dump_status(tg_pt_gp
->tg_pt_gp_alua_access_status
));
2305 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2306 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2311 int new_status
, ret
;
2313 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2314 pr_err("Unable to do set ALUA access status on non"
2315 " valid tg_pt_gp ID: %hu\n",
2316 tg_pt_gp
->tg_pt_gp_valid_id
);
2320 ret
= strict_strtoul(page
, 0, &tmp
);
2322 pr_err("Unable to extract new ALUA access status"
2323 " from %s\n", page
);
2326 new_status
= (int)tmp
;
2328 if ((new_status
!= ALUA_STATUS_NONE
) &&
2329 (new_status
!= ALUA_STATUS_ALTERED_BY_EXPLICT_STPG
) &&
2330 (new_status
!= ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA
)) {
2331 pr_err("Illegal ALUA access status: 0x%02x\n",
2336 tg_pt_gp
->tg_pt_gp_alua_access_status
= new_status
;
2340 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status
, S_IRUGO
| S_IWUSR
);
2345 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2346 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2349 return core_alua_show_access_type(tg_pt_gp
, page
);
2352 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2353 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2357 return core_alua_store_access_type(tg_pt_gp
, page
, count
);
2360 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type
, S_IRUGO
| S_IWUSR
);
2363 * alua_write_metadata
2365 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2366 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2369 return sprintf(page
, "%d\n", tg_pt_gp
->tg_pt_gp_write_metadata
);
2372 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2373 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2380 ret
= strict_strtoul(page
, 0, &tmp
);
2382 pr_err("Unable to extract alua_write_metadata\n");
2386 if ((tmp
!= 0) && (tmp
!= 1)) {
2387 pr_err("Illegal value for alua_write_metadata:"
2391 tg_pt_gp
->tg_pt_gp_write_metadata
= (int)tmp
;
2396 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata
, S_IRUGO
| S_IWUSR
);
2403 static ssize_t
target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2404 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2407 return core_alua_show_nonop_delay_msecs(tg_pt_gp
, page
);
2411 static ssize_t
target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2412 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2416 return core_alua_store_nonop_delay_msecs(tg_pt_gp
, page
, count
);
2419 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs
, S_IRUGO
| S_IWUSR
);
2424 static ssize_t
target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2425 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2428 return core_alua_show_trans_delay_msecs(tg_pt_gp
, page
);
2431 static ssize_t
target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2432 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2436 return core_alua_store_trans_delay_msecs(tg_pt_gp
, page
, count
);
2439 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs
, S_IRUGO
| S_IWUSR
);
2442 * implict_trans_secs
2444 static ssize_t
target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2445 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2448 return core_alua_show_implict_trans_secs(tg_pt_gp
, page
);
2451 static ssize_t
target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2452 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2456 return core_alua_store_implict_trans_secs(tg_pt_gp
, page
, count
);
2459 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs
, S_IRUGO
| S_IWUSR
);
2465 static ssize_t
target_core_alua_tg_pt_gp_show_attr_preferred(
2466 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2469 return core_alua_show_preferred_bit(tg_pt_gp
, page
);
2472 static ssize_t
target_core_alua_tg_pt_gp_store_attr_preferred(
2473 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2477 return core_alua_store_preferred_bit(tg_pt_gp
, page
, count
);
2480 SE_DEV_ALUA_TG_PT_ATTR(preferred
, S_IRUGO
| S_IWUSR
);
2485 static ssize_t
target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2486 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2489 if (!tg_pt_gp
->tg_pt_gp_valid_id
)
2492 return sprintf(page
, "%hu\n", tg_pt_gp
->tg_pt_gp_id
);
2495 static ssize_t
target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2496 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2500 struct config_group
*alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2501 unsigned long tg_pt_gp_id
;
2504 ret
= strict_strtoul(page
, 0, &tg_pt_gp_id
);
2506 pr_err("strict_strtoul() returned %d for"
2507 " tg_pt_gp_id\n", ret
);
2510 if (tg_pt_gp_id
> 0x0000ffff) {
2511 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2512 " 0x0000ffff\n", tg_pt_gp_id
);
2516 ret
= core_alua_set_tg_pt_gp_id(tg_pt_gp
, (u16
)tg_pt_gp_id
);
2520 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2521 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2522 config_item_name(&alua_tg_pt_gp_cg
->cg_item
),
2523 tg_pt_gp
->tg_pt_gp_id
);
2528 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id
, S_IRUGO
| S_IWUSR
);
2533 static ssize_t
target_core_alua_tg_pt_gp_show_attr_members(
2534 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2537 struct se_port
*port
;
2538 struct se_portal_group
*tpg
;
2540 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
2541 ssize_t len
= 0, cur_len
;
2542 unsigned char buf
[TG_PT_GROUP_NAME_BUF
];
2544 memset(buf
, 0, TG_PT_GROUP_NAME_BUF
);
2546 spin_lock(&tg_pt_gp
->tg_pt_gp_lock
);
2547 list_for_each_entry(tg_pt_gp_mem
, &tg_pt_gp
->tg_pt_gp_mem_list
,
2548 tg_pt_gp_mem_list
) {
2549 port
= tg_pt_gp_mem
->tg_pt
;
2550 tpg
= port
->sep_tpg
;
2551 lun
= port
->sep_lun
;
2553 cur_len
= snprintf(buf
, TG_PT_GROUP_NAME_BUF
, "%s/%s/tpgt_%hu"
2554 "/%s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
2555 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
),
2556 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
2557 config_item_name(&lun
->lun_group
.cg_item
));
2558 cur_len
++; /* Extra byte for NULL terminator */
2560 if ((cur_len
+ len
) > PAGE_SIZE
) {
2561 pr_warn("Ran out of lu_gp_show_attr"
2562 "_members buffer\n");
2565 memcpy(page
+len
, buf
, cur_len
);
2568 spin_unlock(&tg_pt_gp
->tg_pt_gp_lock
);
2573 SE_DEV_ALUA_TG_PT_ATTR_RO(members
);
2575 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
,
2578 static struct configfs_attribute
*target_core_alua_tg_pt_gp_attrs
[] = {
2579 &target_core_alua_tg_pt_gp_alua_access_state
.attr
,
2580 &target_core_alua_tg_pt_gp_alua_access_status
.attr
,
2581 &target_core_alua_tg_pt_gp_alua_access_type
.attr
,
2582 &target_core_alua_tg_pt_gp_alua_write_metadata
.attr
,
2583 &target_core_alua_tg_pt_gp_nonop_delay_msecs
.attr
,
2584 &target_core_alua_tg_pt_gp_trans_delay_msecs
.attr
,
2585 &target_core_alua_tg_pt_gp_implict_trans_secs
.attr
,
2586 &target_core_alua_tg_pt_gp_preferred
.attr
,
2587 &target_core_alua_tg_pt_gp_tg_pt_gp_id
.attr
,
2588 &target_core_alua_tg_pt_gp_members
.attr
,
2592 static void target_core_alua_tg_pt_gp_release(struct config_item
*item
)
2594 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2595 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2597 core_alua_free_tg_pt_gp(tg_pt_gp
);
2600 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops
= {
2601 .release
= target_core_alua_tg_pt_gp_release
,
2602 .show_attribute
= target_core_alua_tg_pt_gp_attr_show
,
2603 .store_attribute
= target_core_alua_tg_pt_gp_attr_store
,
2606 static struct config_item_type target_core_alua_tg_pt_gp_cit
= {
2607 .ct_item_ops
= &target_core_alua_tg_pt_gp_ops
,
2608 .ct_attrs
= target_core_alua_tg_pt_gp_attrs
,
2609 .ct_owner
= THIS_MODULE
,
2612 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2614 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2616 static struct config_group
*target_core_alua_create_tg_pt_gp(
2617 struct config_group
*group
,
2620 struct t10_alua
*alua
= container_of(group
, struct t10_alua
,
2621 alua_tg_pt_gps_group
);
2622 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2623 struct se_subsystem_dev
*su_dev
= alua
->t10_sub_dev
;
2624 struct config_group
*alua_tg_pt_gp_cg
= NULL
;
2625 struct config_item
*alua_tg_pt_gp_ci
= NULL
;
2627 tg_pt_gp
= core_alua_allocate_tg_pt_gp(su_dev
, name
, 0);
2631 alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2632 alua_tg_pt_gp_ci
= &alua_tg_pt_gp_cg
->cg_item
;
2634 config_group_init_type_name(alua_tg_pt_gp_cg
, name
,
2635 &target_core_alua_tg_pt_gp_cit
);
2637 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2638 " Group: alua/tg_pt_gps/%s\n",
2639 config_item_name(alua_tg_pt_gp_ci
));
2641 return alua_tg_pt_gp_cg
;
2644 static void target_core_alua_drop_tg_pt_gp(
2645 struct config_group
*group
,
2646 struct config_item
*item
)
2648 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2649 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2651 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2652 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2653 config_item_name(item
), tg_pt_gp
->tg_pt_gp_id
);
2655 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2656 * -> target_core_alua_tg_pt_gp_release().
2658 config_item_put(item
);
2661 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops
= {
2662 .make_group
= &target_core_alua_create_tg_pt_gp
,
2663 .drop_item
= &target_core_alua_drop_tg_pt_gp
,
2666 static struct config_item_type target_core_alua_tg_pt_gps_cit
= {
2667 .ct_group_ops
= &target_core_alua_tg_pt_gps_group_ops
,
2668 .ct_owner
= THIS_MODULE
,
2671 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2673 /* Start functions for struct config_item_type target_core_alua_cit */
2676 * target_core_alua_cit is a ConfigFS group that lives under
2677 * /sys/kernel/config/target/core/alua. There are default groups
2678 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2679 * target_core_alua_cit in target_core_init_configfs() below.
2681 static struct config_item_type target_core_alua_cit
= {
2682 .ct_item_ops
= NULL
,
2684 .ct_owner
= THIS_MODULE
,
2687 /* End functions for struct config_item_type target_core_alua_cit */
2689 /* Start functions for struct config_item_type target_core_stat_cit */
2691 static struct config_group
*target_core_stat_mkdir(
2692 struct config_group
*group
,
2695 return ERR_PTR(-ENOSYS
);
2698 static void target_core_stat_rmdir(
2699 struct config_group
*group
,
2700 struct config_item
*item
)
2705 static struct configfs_group_operations target_core_stat_group_ops
= {
2706 .make_group
= &target_core_stat_mkdir
,
2707 .drop_item
= &target_core_stat_rmdir
,
2710 static struct config_item_type target_core_stat_cit
= {
2711 .ct_group_ops
= &target_core_stat_group_ops
,
2712 .ct_owner
= THIS_MODULE
,
2715 /* End functions for struct config_item_type target_core_stat_cit */
2717 /* Start functions for struct config_item_type target_core_hba_cit */
2719 static struct config_group
*target_core_make_subdev(
2720 struct config_group
*group
,
2723 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2724 struct se_subsystem_dev
*se_dev
;
2725 struct se_subsystem_api
*t
;
2726 struct config_item
*hba_ci
= &group
->cg_item
;
2727 struct se_hba
*hba
= item_to_hba(hba_ci
);
2728 struct config_group
*dev_cg
= NULL
, *tg_pt_gp_cg
= NULL
;
2729 struct config_group
*dev_stat_grp
= NULL
;
2730 int errno
= -ENOMEM
, ret
;
2732 ret
= mutex_lock_interruptible(&hba
->hba_access_mutex
);
2734 return ERR_PTR(ret
);
2736 * Locate the struct se_subsystem_api from parent's struct se_hba.
2740 se_dev
= kzalloc(sizeof(struct se_subsystem_dev
), GFP_KERNEL
);
2742 pr_err("Unable to allocate memory for"
2743 " struct se_subsystem_dev\n");
2746 INIT_LIST_HEAD(&se_dev
->t10_wwn
.t10_vpd_list
);
2747 spin_lock_init(&se_dev
->t10_wwn
.t10_vpd_lock
);
2748 INIT_LIST_HEAD(&se_dev
->t10_pr
.registration_list
);
2749 INIT_LIST_HEAD(&se_dev
->t10_pr
.aptpl_reg_list
);
2750 spin_lock_init(&se_dev
->t10_pr
.registration_lock
);
2751 spin_lock_init(&se_dev
->t10_pr
.aptpl_reg_lock
);
2752 INIT_LIST_HEAD(&se_dev
->t10_alua
.tg_pt_gps_list
);
2753 spin_lock_init(&se_dev
->t10_alua
.tg_pt_gps_lock
);
2754 spin_lock_init(&se_dev
->se_dev_lock
);
2755 se_dev
->t10_pr
.pr_aptpl_buf_len
= PR_APTPL_BUF_LEN
;
2756 se_dev
->t10_wwn
.t10_sub_dev
= se_dev
;
2757 se_dev
->t10_alua
.t10_sub_dev
= se_dev
;
2758 se_dev
->se_dev_attrib
.da_sub_dev
= se_dev
;
2760 se_dev
->se_dev_hba
= hba
;
2761 dev_cg
= &se_dev
->se_dev_group
;
2763 dev_cg
->default_groups
= kzalloc(sizeof(struct config_group
) * 7,
2765 if (!dev_cg
->default_groups
)
2768 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2769 * for ->allocate_virtdevice()
2771 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2772 * has been called successfully in the next level up in the
2773 * configfs tree for device object's struct config_group.
2775 se_dev
->se_dev_su_ptr
= t
->allocate_virtdevice(hba
, name
);
2776 if (!se_dev
->se_dev_su_ptr
) {
2777 pr_err("Unable to locate subsystem dependent pointer"
2778 " from allocate_virtdevice()\n");
2782 config_group_init_type_name(&se_dev
->se_dev_group
, name
,
2783 &target_core_dev_cit
);
2784 config_group_init_type_name(&se_dev
->se_dev_attrib
.da_group
, "attrib",
2785 &target_core_dev_attrib_cit
);
2786 config_group_init_type_name(&se_dev
->se_dev_pr_group
, "pr",
2787 &target_core_dev_pr_cit
);
2788 config_group_init_type_name(&se_dev
->t10_wwn
.t10_wwn_group
, "wwn",
2789 &target_core_dev_wwn_cit
);
2790 config_group_init_type_name(&se_dev
->t10_alua
.alua_tg_pt_gps_group
,
2791 "alua", &target_core_alua_tg_pt_gps_cit
);
2792 config_group_init_type_name(&se_dev
->dev_stat_grps
.stat_group
,
2793 "statistics", &target_core_stat_cit
);
2795 dev_cg
->default_groups
[0] = &se_dev
->se_dev_attrib
.da_group
;
2796 dev_cg
->default_groups
[1] = &se_dev
->se_dev_pr_group
;
2797 dev_cg
->default_groups
[2] = &se_dev
->t10_wwn
.t10_wwn_group
;
2798 dev_cg
->default_groups
[3] = &se_dev
->t10_alua
.alua_tg_pt_gps_group
;
2799 dev_cg
->default_groups
[4] = &se_dev
->dev_stat_grps
.stat_group
;
2800 dev_cg
->default_groups
[5] = NULL
;
2802 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2804 tg_pt_gp
= core_alua_allocate_tg_pt_gp(se_dev
, "default_tg_pt_gp", 1);
2808 tg_pt_gp_cg
= &se_dev
->t10_alua
.alua_tg_pt_gps_group
;
2809 tg_pt_gp_cg
->default_groups
= kzalloc(sizeof(struct config_group
) * 2,
2811 if (!tg_pt_gp_cg
->default_groups
) {
2812 pr_err("Unable to allocate tg_pt_gp_cg->"
2813 "default_groups\n");
2817 config_group_init_type_name(&tg_pt_gp
->tg_pt_gp_group
,
2818 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit
);
2819 tg_pt_gp_cg
->default_groups
[0] = &tg_pt_gp
->tg_pt_gp_group
;
2820 tg_pt_gp_cg
->default_groups
[1] = NULL
;
2821 se_dev
->t10_alua
.default_tg_pt_gp
= tg_pt_gp
;
2823 * Add core/$HBA/$DEV/statistics/ default groups
2825 dev_stat_grp
= &se_dev
->dev_stat_grps
.stat_group
;
2826 dev_stat_grp
->default_groups
= kzalloc(sizeof(struct config_group
) * 4,
2828 if (!dev_stat_grp
->default_groups
) {
2829 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2832 target_stat_setup_dev_default_groups(se_dev
);
2834 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2835 " %p se_dev_su_ptr: %p\n", se_dev
, se_dev
->se_dev_su_ptr
);
2837 mutex_unlock(&hba
->hba_access_mutex
);
2838 return &se_dev
->se_dev_group
;
2840 if (se_dev
->t10_alua
.default_tg_pt_gp
) {
2841 core_alua_free_tg_pt_gp(se_dev
->t10_alua
.default_tg_pt_gp
);
2842 se_dev
->t10_alua
.default_tg_pt_gp
= NULL
;
2845 kfree(dev_stat_grp
->default_groups
);
2847 kfree(tg_pt_gp_cg
->default_groups
);
2849 kfree(dev_cg
->default_groups
);
2850 if (se_dev
->se_dev_su_ptr
)
2851 t
->free_device(se_dev
->se_dev_su_ptr
);
2854 mutex_unlock(&hba
->hba_access_mutex
);
2855 return ERR_PTR(errno
);
2858 static void target_core_drop_subdev(
2859 struct config_group
*group
,
2860 struct config_item
*item
)
2862 struct se_subsystem_dev
*se_dev
= container_of(to_config_group(item
),
2863 struct se_subsystem_dev
, se_dev_group
);
2865 struct config_item
*df_item
;
2866 struct config_group
*dev_cg
, *tg_pt_gp_cg
, *dev_stat_grp
;
2869 hba
= item_to_hba(&se_dev
->se_dev_hba
->hba_group
.cg_item
);
2871 mutex_lock(&hba
->hba_access_mutex
);
2873 dev_stat_grp
= &se_dev
->dev_stat_grps
.stat_group
;
2874 for (i
= 0; dev_stat_grp
->default_groups
[i
]; i
++) {
2875 df_item
= &dev_stat_grp
->default_groups
[i
]->cg_item
;
2876 dev_stat_grp
->default_groups
[i
] = NULL
;
2877 config_item_put(df_item
);
2879 kfree(dev_stat_grp
->default_groups
);
2881 tg_pt_gp_cg
= &se_dev
->t10_alua
.alua_tg_pt_gps_group
;
2882 for (i
= 0; tg_pt_gp_cg
->default_groups
[i
]; i
++) {
2883 df_item
= &tg_pt_gp_cg
->default_groups
[i
]->cg_item
;
2884 tg_pt_gp_cg
->default_groups
[i
] = NULL
;
2885 config_item_put(df_item
);
2887 kfree(tg_pt_gp_cg
->default_groups
);
2889 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2890 * directly from target_core_alua_tg_pt_gp_release().
2892 se_dev
->t10_alua
.default_tg_pt_gp
= NULL
;
2894 dev_cg
= &se_dev
->se_dev_group
;
2895 for (i
= 0; dev_cg
->default_groups
[i
]; i
++) {
2896 df_item
= &dev_cg
->default_groups
[i
]->cg_item
;
2897 dev_cg
->default_groups
[i
] = NULL
;
2898 config_item_put(df_item
);
2901 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2902 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2904 config_item_put(item
);
2905 mutex_unlock(&hba
->hba_access_mutex
);
2908 static struct configfs_group_operations target_core_hba_group_ops
= {
2909 .make_group
= target_core_make_subdev
,
2910 .drop_item
= target_core_drop_subdev
,
2913 CONFIGFS_EATTR_STRUCT(target_core_hba
, se_hba
);
2914 #define SE_HBA_ATTR(_name, _mode) \
2915 static struct target_core_hba_attribute \
2916 target_core_hba_##_name = \
2917 __CONFIGFS_EATTR(_name, _mode, \
2918 target_core_hba_show_attr_##_name, \
2919 target_core_hba_store_attr_##_name);
2921 #define SE_HBA_ATTR_RO(_name) \
2922 static struct target_core_hba_attribute \
2923 target_core_hba_##_name = \
2924 __CONFIGFS_EATTR_RO(_name, \
2925 target_core_hba_show_attr_##_name);
2927 static ssize_t
target_core_hba_show_attr_hba_info(
2931 return sprintf(page
, "HBA Index: %d plugin: %s version: %s\n",
2932 hba
->hba_id
, hba
->transport
->name
,
2933 TARGET_CORE_CONFIGFS_VERSION
);
2936 SE_HBA_ATTR_RO(hba_info
);
2938 static ssize_t
target_core_hba_show_attr_hba_mode(struct se_hba
*hba
,
2943 if (hba
->hba_flags
& HBA_FLAGS_PSCSI_MODE
)
2946 return sprintf(page
, "%d\n", hba_mode
);
2949 static ssize_t
target_core_hba_store_attr_hba_mode(struct se_hba
*hba
,
2950 const char *page
, size_t count
)
2952 struct se_subsystem_api
*transport
= hba
->transport
;
2953 unsigned long mode_flag
;
2956 if (transport
->pmode_enable_hba
== NULL
)
2959 ret
= strict_strtoul(page
, 0, &mode_flag
);
2961 pr_err("Unable to extract hba mode flag: %d\n", ret
);
2965 spin_lock(&hba
->device_lock
);
2966 if (!list_empty(&hba
->hba_dev_list
)) {
2967 pr_err("Unable to set hba_mode with active devices\n");
2968 spin_unlock(&hba
->device_lock
);
2971 spin_unlock(&hba
->device_lock
);
2973 ret
= transport
->pmode_enable_hba(hba
, mode_flag
);
2977 hba
->hba_flags
|= HBA_FLAGS_PSCSI_MODE
;
2979 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
2984 SE_HBA_ATTR(hba_mode
, S_IRUGO
| S_IWUSR
);
2986 CONFIGFS_EATTR_OPS(target_core_hba
, se_hba
, hba_group
);
2988 static void target_core_hba_release(struct config_item
*item
)
2990 struct se_hba
*hba
= container_of(to_config_group(item
),
2991 struct se_hba
, hba_group
);
2992 core_delete_hba(hba
);
2995 static struct configfs_attribute
*target_core_hba_attrs
[] = {
2996 &target_core_hba_hba_info
.attr
,
2997 &target_core_hba_hba_mode
.attr
,
3001 static struct configfs_item_operations target_core_hba_item_ops
= {
3002 .release
= target_core_hba_release
,
3003 .show_attribute
= target_core_hba_attr_show
,
3004 .store_attribute
= target_core_hba_attr_store
,
3007 static struct config_item_type target_core_hba_cit
= {
3008 .ct_item_ops
= &target_core_hba_item_ops
,
3009 .ct_group_ops
= &target_core_hba_group_ops
,
3010 .ct_attrs
= target_core_hba_attrs
,
3011 .ct_owner
= THIS_MODULE
,
3014 static struct config_group
*target_core_call_addhbatotarget(
3015 struct config_group
*group
,
3018 char *se_plugin_str
, *str
, *str2
;
3020 char buf
[TARGET_CORE_NAME_MAX_LEN
];
3021 unsigned long plugin_dep_id
= 0;
3024 memset(buf
, 0, TARGET_CORE_NAME_MAX_LEN
);
3025 if (strlen(name
) >= TARGET_CORE_NAME_MAX_LEN
) {
3026 pr_err("Passed *name strlen(): %d exceeds"
3027 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name
),
3028 TARGET_CORE_NAME_MAX_LEN
);
3029 return ERR_PTR(-ENAMETOOLONG
);
3031 snprintf(buf
, TARGET_CORE_NAME_MAX_LEN
, "%s", name
);
3033 str
= strstr(buf
, "_");
3035 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3036 return ERR_PTR(-EINVAL
);
3038 se_plugin_str
= buf
;
3040 * Special case for subsystem plugins that have "_" in their names.
3041 * Namely rd_direct and rd_mcp..
3043 str2
= strstr(str
+1, "_");
3045 *str2
= '\0'; /* Terminate for *se_plugin_str */
3046 str2
++; /* Skip to start of plugin dependent ID */
3049 *str
= '\0'; /* Terminate for *se_plugin_str */
3050 str
++; /* Skip to start of plugin dependent ID */
3053 ret
= strict_strtoul(str
, 0, &plugin_dep_id
);
3055 pr_err("strict_strtoul() returned %d for"
3056 " plugin_dep_id\n", ret
);
3057 return ERR_PTR(-EINVAL
);
3060 * Load up TCM subsystem plugins if they have not already been loaded.
3062 transport_subsystem_check_init();
3064 hba
= core_alloc_hba(se_plugin_str
, plugin_dep_id
, 0);
3066 return ERR_CAST(hba
);
3068 config_group_init_type_name(&hba
->hba_group
, name
,
3069 &target_core_hba_cit
);
3071 return &hba
->hba_group
;
3074 static void target_core_call_delhbafromtarget(
3075 struct config_group
*group
,
3076 struct config_item
*item
)
3079 * core_delete_hba() is called from target_core_hba_item_ops->release()
3080 * -> target_core_hba_release()
3082 config_item_put(item
);
3085 static struct configfs_group_operations target_core_group_ops
= {
3086 .make_group
= target_core_call_addhbatotarget
,
3087 .drop_item
= target_core_call_delhbafromtarget
,
3090 static struct config_item_type target_core_cit
= {
3091 .ct_item_ops
= NULL
,
3092 .ct_group_ops
= &target_core_group_ops
,
3094 .ct_owner
= THIS_MODULE
,
3097 /* Stop functions for struct config_item_type target_core_hba_cit */
3099 static int __init
target_core_init_configfs(void)
3101 struct config_group
*target_cg
, *hba_cg
= NULL
, *alua_cg
= NULL
;
3102 struct config_group
*lu_gp_cg
= NULL
;
3103 struct configfs_subsystem
*subsys
;
3104 struct t10_alua_lu_gp
*lu_gp
;
3107 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3108 " Engine: %s on %s/%s on "UTS_RELEASE
"\n",
3109 TARGET_CORE_VERSION
, utsname()->sysname
, utsname()->machine
);
3111 subsys
= target_core_subsystem
[0];
3112 config_group_init(&subsys
->su_group
);
3113 mutex_init(&subsys
->su_mutex
);
3115 ret
= init_se_kmem_caches();
3119 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3120 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3122 target_cg
= &subsys
->su_group
;
3123 target_cg
->default_groups
= kzalloc(sizeof(struct config_group
) * 2,
3125 if (!target_cg
->default_groups
) {
3126 pr_err("Unable to allocate target_cg->default_groups\n");
3131 config_group_init_type_name(&target_core_hbagroup
,
3132 "core", &target_core_cit
);
3133 target_cg
->default_groups
[0] = &target_core_hbagroup
;
3134 target_cg
->default_groups
[1] = NULL
;
3136 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3138 hba_cg
= &target_core_hbagroup
;
3139 hba_cg
->default_groups
= kzalloc(sizeof(struct config_group
) * 2,
3141 if (!hba_cg
->default_groups
) {
3142 pr_err("Unable to allocate hba_cg->default_groups\n");
3146 config_group_init_type_name(&alua_group
,
3147 "alua", &target_core_alua_cit
);
3148 hba_cg
->default_groups
[0] = &alua_group
;
3149 hba_cg
->default_groups
[1] = NULL
;
3151 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3152 * groups under /sys/kernel/config/target/core/alua/
3154 alua_cg
= &alua_group
;
3155 alua_cg
->default_groups
= kzalloc(sizeof(struct config_group
) * 2,
3157 if (!alua_cg
->default_groups
) {
3158 pr_err("Unable to allocate alua_cg->default_groups\n");
3163 config_group_init_type_name(&alua_lu_gps_group
,
3164 "lu_gps", &target_core_alua_lu_gps_cit
);
3165 alua_cg
->default_groups
[0] = &alua_lu_gps_group
;
3166 alua_cg
->default_groups
[1] = NULL
;
3168 * Add core/alua/lu_gps/default_lu_gp
3170 lu_gp
= core_alua_allocate_lu_gp("default_lu_gp", 1);
3171 if (IS_ERR(lu_gp
)) {
3176 lu_gp_cg
= &alua_lu_gps_group
;
3177 lu_gp_cg
->default_groups
= kzalloc(sizeof(struct config_group
) * 2,
3179 if (!lu_gp_cg
->default_groups
) {
3180 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3185 config_group_init_type_name(&lu_gp
->lu_gp_group
, "default_lu_gp",
3186 &target_core_alua_lu_gp_cit
);
3187 lu_gp_cg
->default_groups
[0] = &lu_gp
->lu_gp_group
;
3188 lu_gp_cg
->default_groups
[1] = NULL
;
3189 default_lu_gp
= lu_gp
;
3191 * Register the target_core_mod subsystem with configfs.
3193 ret
= configfs_register_subsystem(subsys
);
3195 pr_err("Error %d while registering subsystem %s\n",
3196 ret
, subsys
->su_group
.cg_item
.ci_namebuf
);
3199 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3200 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION
" on %s/%s"
3201 " on "UTS_RELEASE
"\n", utsname()->sysname
, utsname()->machine
);
3203 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3205 ret
= rd_module_init();
3209 ret
= core_dev_setup_virtual_lun0();
3216 configfs_unregister_subsystem(subsys
);
3217 core_dev_release_virtual_lun0();
3220 if (default_lu_gp
) {
3221 core_alua_free_lu_gp(default_lu_gp
);
3222 default_lu_gp
= NULL
;
3225 kfree(lu_gp_cg
->default_groups
);
3227 kfree(alua_cg
->default_groups
);
3229 kfree(hba_cg
->default_groups
);
3230 kfree(target_cg
->default_groups
);
3231 release_se_kmem_caches();
3235 static void __exit
target_core_exit_configfs(void)
3237 struct configfs_subsystem
*subsys
;
3238 struct config_group
*hba_cg
, *alua_cg
, *lu_gp_cg
;
3239 struct config_item
*item
;
3242 subsys
= target_core_subsystem
[0];
3244 lu_gp_cg
= &alua_lu_gps_group
;
3245 for (i
= 0; lu_gp_cg
->default_groups
[i
]; i
++) {
3246 item
= &lu_gp_cg
->default_groups
[i
]->cg_item
;
3247 lu_gp_cg
->default_groups
[i
] = NULL
;
3248 config_item_put(item
);
3250 kfree(lu_gp_cg
->default_groups
);
3251 lu_gp_cg
->default_groups
= NULL
;
3253 alua_cg
= &alua_group
;
3254 for (i
= 0; alua_cg
->default_groups
[i
]; i
++) {
3255 item
= &alua_cg
->default_groups
[i
]->cg_item
;
3256 alua_cg
->default_groups
[i
] = NULL
;
3257 config_item_put(item
);
3259 kfree(alua_cg
->default_groups
);
3260 alua_cg
->default_groups
= NULL
;
3262 hba_cg
= &target_core_hbagroup
;
3263 for (i
= 0; hba_cg
->default_groups
[i
]; i
++) {
3264 item
= &hba_cg
->default_groups
[i
]->cg_item
;
3265 hba_cg
->default_groups
[i
] = NULL
;
3266 config_item_put(item
);
3268 kfree(hba_cg
->default_groups
);
3269 hba_cg
->default_groups
= NULL
;
3271 * We expect subsys->su_group.default_groups to be released
3272 * by configfs subsystem provider logic..
3274 configfs_unregister_subsystem(subsys
);
3275 kfree(subsys
->su_group
.default_groups
);
3277 core_alua_free_lu_gp(default_lu_gp
);
3278 default_lu_gp
= NULL
;
3280 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3281 " Infrastructure\n");
3283 core_dev_release_virtual_lun0();
3285 release_se_kmem_caches();
3288 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3289 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3290 MODULE_LICENSE("GPL");
3292 module_init(target_core_init_configfs
);
3293 module_exit(target_core_exit_configfs
);