1 /*******************************************************************************
2 * Filename: target_core_configfs.c
4 * This file contains ConfigFS logic for the Generic Target Engine project.
6 * (c) Copyright 2008-2012 RisingTide Systems LLC.
8 * Nicholas A. Bellinger <nab@kernel.org>
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43 #include <target/target_core_fabric_configfs.h>
44 #include <target/target_core_configfs.h>
45 #include <target/configfs_macros.h>
47 #include "target_core_internal.h"
48 #include "target_core_alua.h"
49 #include "target_core_pr.h"
50 #include "target_core_rd.h"
52 extern struct t10_alua_lu_gp
*default_lu_gp
;
54 static LIST_HEAD(g_tf_list
);
55 static DEFINE_MUTEX(g_tf_lock
);
57 struct target_core_configfs_attribute
{
58 struct configfs_attribute attr
;
59 ssize_t (*show
)(void *, char *);
60 ssize_t (*store
)(void *, const char *, size_t);
63 static struct config_group target_core_hbagroup
;
64 static struct config_group alua_group
;
65 static struct config_group alua_lu_gps_group
;
67 static inline struct se_hba
*
68 item_to_hba(struct config_item
*item
)
70 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
74 * Attributes for /sys/kernel/config/target/
76 static ssize_t
target_core_attr_show(struct config_item
*item
,
77 struct configfs_attribute
*attr
,
80 return sprintf(page
, "Target Engine Core ConfigFS Infrastructure %s"
81 " on %s/%s on "UTS_RELEASE
"\n", TARGET_CORE_CONFIGFS_VERSION
,
82 utsname()->sysname
, utsname()->machine
);
85 static struct configfs_item_operations target_core_fabric_item_ops
= {
86 .show_attribute
= target_core_attr_show
,
89 static struct configfs_attribute target_core_item_attr_version
= {
90 .ca_owner
= THIS_MODULE
,
95 static struct target_fabric_configfs
*target_core_get_fabric(
98 struct target_fabric_configfs
*tf
;
103 mutex_lock(&g_tf_lock
);
104 list_for_each_entry(tf
, &g_tf_list
, tf_list
) {
105 if (!strcmp(tf
->tf_name
, name
)) {
106 atomic_inc(&tf
->tf_access_cnt
);
107 mutex_unlock(&g_tf_lock
);
111 mutex_unlock(&g_tf_lock
);
117 * Called from struct target_core_group_ops->make_group()
119 static struct config_group
*target_core_register_fabric(
120 struct config_group
*group
,
123 struct target_fabric_configfs
*tf
;
126 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
127 " %s\n", group
, name
);
129 * Below are some hardcoded request_module() calls to automatically
130 * local fabric modules when the following is called:
132 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134 * Note that this does not limit which TCM fabric module can be
135 * registered, but simply provids auto loading logic for modules with
136 * mkdir(2) system calls with known TCM fabric modules.
138 if (!strncmp(name
, "iscsi", 5)) {
140 * Automatically load the LIO Target fabric module when the
141 * following is called:
143 * mkdir -p $CONFIGFS/target/iscsi
145 ret
= request_module("iscsi_target_mod");
147 pr_err("request_module() failed for"
148 " iscsi_target_mod.ko: %d\n", ret
);
149 return ERR_PTR(-EINVAL
);
151 } else if (!strncmp(name
, "loopback", 8)) {
153 * Automatically load the tcm_loop fabric module when the
154 * following is called:
156 * mkdir -p $CONFIGFS/target/loopback
158 ret
= request_module("tcm_loop");
160 pr_err("request_module() failed for"
161 " tcm_loop.ko: %d\n", ret
);
162 return ERR_PTR(-EINVAL
);
166 tf
= target_core_get_fabric(name
);
168 pr_err("target_core_get_fabric() failed for %s\n",
170 return ERR_PTR(-EINVAL
);
172 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
173 " %s\n", tf
->tf_name
);
175 * On a successful target_core_get_fabric() look, the returned
176 * struct target_fabric_configfs *tf will contain a usage reference.
178 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
179 &TF_CIT_TMPL(tf
)->tfc_wwn_cit
);
181 tf
->tf_group
.default_groups
= tf
->tf_default_groups
;
182 tf
->tf_group
.default_groups
[0] = &tf
->tf_disc_group
;
183 tf
->tf_group
.default_groups
[1] = NULL
;
185 config_group_init_type_name(&tf
->tf_group
, name
,
186 &TF_CIT_TMPL(tf
)->tfc_wwn_cit
);
187 config_group_init_type_name(&tf
->tf_disc_group
, "discovery_auth",
188 &TF_CIT_TMPL(tf
)->tfc_discovery_cit
);
190 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
191 " %s\n", tf
->tf_group
.cg_item
.ci_name
);
193 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
195 tf
->tf_ops
.tf_subsys
= tf
->tf_subsys
;
196 tf
->tf_fabric
= &tf
->tf_group
.cg_item
;
197 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
200 return &tf
->tf_group
;
204 * Called from struct target_core_group_ops->drop_item()
206 static void target_core_deregister_fabric(
207 struct config_group
*group
,
208 struct config_item
*item
)
210 struct target_fabric_configfs
*tf
= container_of(
211 to_config_group(item
), struct target_fabric_configfs
, tf_group
);
212 struct config_group
*tf_group
;
213 struct config_item
*df_item
;
216 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
217 " tf list\n", config_item_name(item
));
219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
220 " %s\n", tf
->tf_name
);
221 atomic_dec(&tf
->tf_access_cnt
);
223 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
224 " tf->tf_fabric for %s\n", tf
->tf_name
);
225 tf
->tf_fabric
= NULL
;
227 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
228 " %s\n", config_item_name(item
));
230 tf_group
= &tf
->tf_group
;
231 for (i
= 0; tf_group
->default_groups
[i
]; i
++) {
232 df_item
= &tf_group
->default_groups
[i
]->cg_item
;
233 tf_group
->default_groups
[i
] = NULL
;
234 config_item_put(df_item
);
236 config_item_put(item
);
239 static struct configfs_group_operations target_core_fabric_group_ops
= {
240 .make_group
= &target_core_register_fabric
,
241 .drop_item
= &target_core_deregister_fabric
,
245 * All item attributes appearing in /sys/kernel/target/ appear here.
247 static struct configfs_attribute
*target_core_fabric_item_attrs
[] = {
248 &target_core_item_attr_version
,
253 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255 static struct config_item_type target_core_fabrics_item
= {
256 .ct_item_ops
= &target_core_fabric_item_ops
,
257 .ct_group_ops
= &target_core_fabric_group_ops
,
258 .ct_attrs
= target_core_fabric_item_attrs
,
259 .ct_owner
= THIS_MODULE
,
262 static struct configfs_subsystem target_core_fabrics
= {
265 .ci_namebuf
= "target",
266 .ci_type
= &target_core_fabrics_item
,
271 static struct configfs_subsystem
*target_core_subsystem
[] = {
272 &target_core_fabrics
,
276 /*##############################################################################
277 // Start functions called by external Target Fabrics Modules
278 //############################################################################*/
281 * First function called by fabric modules to:
283 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
284 * 2) Add struct target_fabric_configfs to g_tf_list
285 * 3) Return struct target_fabric_configfs to fabric module to be passed
286 * into target_fabric_configfs_register().
288 struct target_fabric_configfs
*target_fabric_configfs_init(
289 struct module
*fabric_mod
,
292 struct target_fabric_configfs
*tf
;
295 pr_err("Unable to locate passed fabric name\n");
296 return ERR_PTR(-EINVAL
);
298 if (strlen(name
) >= TARGET_FABRIC_NAME_SIZE
) {
299 pr_err("Passed name: %s exceeds TARGET_FABRIC"
300 "_NAME_SIZE\n", name
);
301 return ERR_PTR(-EINVAL
);
304 tf
= kzalloc(sizeof(struct target_fabric_configfs
), GFP_KERNEL
);
306 return ERR_PTR(-ENOMEM
);
308 INIT_LIST_HEAD(&tf
->tf_list
);
309 atomic_set(&tf
->tf_access_cnt
, 0);
311 * Setup the default generic struct config_item_type's (cits) in
312 * struct target_fabric_configfs->tf_cit_tmpl
314 tf
->tf_module
= fabric_mod
;
315 target_fabric_setup_cits(tf
);
317 tf
->tf_subsys
= target_core_subsystem
[0];
318 snprintf(tf
->tf_name
, TARGET_FABRIC_NAME_SIZE
, "%s", name
);
320 mutex_lock(&g_tf_lock
);
321 list_add_tail(&tf
->tf_list
, &g_tf_list
);
322 mutex_unlock(&g_tf_lock
);
324 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
326 pr_debug("Initialized struct target_fabric_configfs: %p for"
327 " %s\n", tf
, tf
->tf_name
);
330 EXPORT_SYMBOL(target_fabric_configfs_init
);
333 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335 void target_fabric_configfs_free(
336 struct target_fabric_configfs
*tf
)
338 mutex_lock(&g_tf_lock
);
339 list_del(&tf
->tf_list
);
340 mutex_unlock(&g_tf_lock
);
344 EXPORT_SYMBOL(target_fabric_configfs_free
);
347 * Perform a sanity check of the passed tf->tf_ops before completing
348 * TCM fabric module registration.
350 static int target_fabric_tf_ops_check(
351 struct target_fabric_configfs
*tf
)
353 struct target_core_fabric_ops
*tfo
= &tf
->tf_ops
;
355 if (!tfo
->get_fabric_name
) {
356 pr_err("Missing tfo->get_fabric_name()\n");
359 if (!tfo
->get_fabric_proto_ident
) {
360 pr_err("Missing tfo->get_fabric_proto_ident()\n");
363 if (!tfo
->tpg_get_wwn
) {
364 pr_err("Missing tfo->tpg_get_wwn()\n");
367 if (!tfo
->tpg_get_tag
) {
368 pr_err("Missing tfo->tpg_get_tag()\n");
371 if (!tfo
->tpg_get_default_depth
) {
372 pr_err("Missing tfo->tpg_get_default_depth()\n");
375 if (!tfo
->tpg_get_pr_transport_id
) {
376 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
379 if (!tfo
->tpg_get_pr_transport_id_len
) {
380 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
383 if (!tfo
->tpg_check_demo_mode
) {
384 pr_err("Missing tfo->tpg_check_demo_mode()\n");
387 if (!tfo
->tpg_check_demo_mode_cache
) {
388 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
391 if (!tfo
->tpg_check_demo_mode_write_protect
) {
392 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
395 if (!tfo
->tpg_check_prod_mode_write_protect
) {
396 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
399 if (!tfo
->tpg_alloc_fabric_acl
) {
400 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
403 if (!tfo
->tpg_release_fabric_acl
) {
404 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
407 if (!tfo
->tpg_get_inst_index
) {
408 pr_err("Missing tfo->tpg_get_inst_index()\n");
411 if (!tfo
->release_cmd
) {
412 pr_err("Missing tfo->release_cmd()\n");
415 if (!tfo
->shutdown_session
) {
416 pr_err("Missing tfo->shutdown_session()\n");
419 if (!tfo
->close_session
) {
420 pr_err("Missing tfo->close_session()\n");
423 if (!tfo
->sess_get_index
) {
424 pr_err("Missing tfo->sess_get_index()\n");
427 if (!tfo
->write_pending
) {
428 pr_err("Missing tfo->write_pending()\n");
431 if (!tfo
->write_pending_status
) {
432 pr_err("Missing tfo->write_pending_status()\n");
435 if (!tfo
->set_default_node_attributes
) {
436 pr_err("Missing tfo->set_default_node_attributes()\n");
439 if (!tfo
->get_task_tag
) {
440 pr_err("Missing tfo->get_task_tag()\n");
443 if (!tfo
->get_cmd_state
) {
444 pr_err("Missing tfo->get_cmd_state()\n");
447 if (!tfo
->queue_data_in
) {
448 pr_err("Missing tfo->queue_data_in()\n");
451 if (!tfo
->queue_status
) {
452 pr_err("Missing tfo->queue_status()\n");
455 if (!tfo
->queue_tm_rsp
) {
456 pr_err("Missing tfo->queue_tm_rsp()\n");
460 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
461 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
462 * target_core_fabric_configfs.c WWN+TPG group context code.
464 if (!tfo
->fabric_make_wwn
) {
465 pr_err("Missing tfo->fabric_make_wwn()\n");
468 if (!tfo
->fabric_drop_wwn
) {
469 pr_err("Missing tfo->fabric_drop_wwn()\n");
472 if (!tfo
->fabric_make_tpg
) {
473 pr_err("Missing tfo->fabric_make_tpg()\n");
476 if (!tfo
->fabric_drop_tpg
) {
477 pr_err("Missing tfo->fabric_drop_tpg()\n");
485 * Called 2nd from fabric module with returned parameter of
486 * struct target_fabric_configfs * from target_fabric_configfs_init().
488 * Upon a successful registration, the new fabric's struct config_item is
489 * return. Also, a pointer to this struct is set in the passed
490 * struct target_fabric_configfs.
492 int target_fabric_configfs_register(
493 struct target_fabric_configfs
*tf
)
498 pr_err("Unable to locate target_fabric_configfs"
502 if (!tf
->tf_subsys
) {
503 pr_err("Unable to target struct config_subsystem"
507 ret
= target_fabric_tf_ops_check(tf
);
511 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
515 EXPORT_SYMBOL(target_fabric_configfs_register
);
517 void target_fabric_configfs_deregister(
518 struct target_fabric_configfs
*tf
)
520 struct configfs_subsystem
*su
;
523 pr_err("Unable to locate passed target_fabric_"
529 pr_err("Unable to locate passed tf->tf_subsys"
533 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
535 mutex_lock(&g_tf_lock
);
536 if (atomic_read(&tf
->tf_access_cnt
)) {
537 mutex_unlock(&g_tf_lock
);
538 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
542 list_del(&tf
->tf_list
);
543 mutex_unlock(&g_tf_lock
);
545 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
546 " %s\n", tf
->tf_name
);
547 tf
->tf_module
= NULL
;
548 tf
->tf_subsys
= NULL
;
551 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
554 EXPORT_SYMBOL(target_fabric_configfs_deregister
);
556 /*##############################################################################
557 // Stop functions called by external Target Fabrics Modules
558 //############################################################################*/
560 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
562 #define DEF_DEV_ATTRIB_SHOW(_name) \
563 static ssize_t target_core_dev_show_attr_##_name( \
564 struct se_dev_attrib *da, \
567 return snprintf(page, PAGE_SIZE, "%u\n", \
568 (u32)da->da_dev->dev_attrib._name); \
571 #define DEF_DEV_ATTRIB_STORE(_name) \
572 static ssize_t target_core_dev_store_attr_##_name( \
573 struct se_dev_attrib *da, \
580 ret = strict_strtoul(page, 0, &val); \
582 pr_err("strict_strtoul() failed with" \
583 " ret: %d\n", ret); \
586 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
588 return (!ret) ? count : -EINVAL; \
591 #define DEF_DEV_ATTRIB(_name) \
592 DEF_DEV_ATTRIB_SHOW(_name); \
593 DEF_DEV_ATTRIB_STORE(_name);
595 #define DEF_DEV_ATTRIB_RO(_name) \
596 DEF_DEV_ATTRIB_SHOW(_name);
598 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib
, se_dev_attrib
);
599 #define SE_DEV_ATTR(_name, _mode) \
600 static struct target_core_dev_attrib_attribute \
601 target_core_dev_attrib_##_name = \
602 __CONFIGFS_EATTR(_name, _mode, \
603 target_core_dev_show_attr_##_name, \
604 target_core_dev_store_attr_##_name);
606 #define SE_DEV_ATTR_RO(_name); \
607 static struct target_core_dev_attrib_attribute \
608 target_core_dev_attrib_##_name = \
609 __CONFIGFS_EATTR_RO(_name, \
610 target_core_dev_show_attr_##_name);
612 DEF_DEV_ATTRIB(emulate_model_alias
);
613 SE_DEV_ATTR(emulate_model_alias
, S_IRUGO
| S_IWUSR
);
615 DEF_DEV_ATTRIB(emulate_dpo
);
616 SE_DEV_ATTR(emulate_dpo
, S_IRUGO
| S_IWUSR
);
618 DEF_DEV_ATTRIB(emulate_fua_write
);
619 SE_DEV_ATTR(emulate_fua_write
, S_IRUGO
| S_IWUSR
);
621 DEF_DEV_ATTRIB(emulate_fua_read
);
622 SE_DEV_ATTR(emulate_fua_read
, S_IRUGO
| S_IWUSR
);
624 DEF_DEV_ATTRIB(emulate_write_cache
);
625 SE_DEV_ATTR(emulate_write_cache
, S_IRUGO
| S_IWUSR
);
627 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl
);
628 SE_DEV_ATTR(emulate_ua_intlck_ctrl
, S_IRUGO
| S_IWUSR
);
630 DEF_DEV_ATTRIB(emulate_tas
);
631 SE_DEV_ATTR(emulate_tas
, S_IRUGO
| S_IWUSR
);
633 DEF_DEV_ATTRIB(emulate_tpu
);
634 SE_DEV_ATTR(emulate_tpu
, S_IRUGO
| S_IWUSR
);
636 DEF_DEV_ATTRIB(emulate_tpws
);
637 SE_DEV_ATTR(emulate_tpws
, S_IRUGO
| S_IWUSR
);
639 DEF_DEV_ATTRIB(enforce_pr_isids
);
640 SE_DEV_ATTR(enforce_pr_isids
, S_IRUGO
| S_IWUSR
);
642 DEF_DEV_ATTRIB(is_nonrot
);
643 SE_DEV_ATTR(is_nonrot
, S_IRUGO
| S_IWUSR
);
645 DEF_DEV_ATTRIB(emulate_rest_reord
);
646 SE_DEV_ATTR(emulate_rest_reord
, S_IRUGO
| S_IWUSR
);
648 DEF_DEV_ATTRIB_RO(hw_block_size
);
649 SE_DEV_ATTR_RO(hw_block_size
);
651 DEF_DEV_ATTRIB(block_size
);
652 SE_DEV_ATTR(block_size
, S_IRUGO
| S_IWUSR
);
654 DEF_DEV_ATTRIB_RO(hw_max_sectors
);
655 SE_DEV_ATTR_RO(hw_max_sectors
);
657 DEF_DEV_ATTRIB(fabric_max_sectors
);
658 SE_DEV_ATTR(fabric_max_sectors
, S_IRUGO
| S_IWUSR
);
660 DEF_DEV_ATTRIB(optimal_sectors
);
661 SE_DEV_ATTR(optimal_sectors
, S_IRUGO
| S_IWUSR
);
663 DEF_DEV_ATTRIB_RO(hw_queue_depth
);
664 SE_DEV_ATTR_RO(hw_queue_depth
);
666 DEF_DEV_ATTRIB(queue_depth
);
667 SE_DEV_ATTR(queue_depth
, S_IRUGO
| S_IWUSR
);
669 DEF_DEV_ATTRIB(max_unmap_lba_count
);
670 SE_DEV_ATTR(max_unmap_lba_count
, S_IRUGO
| S_IWUSR
);
672 DEF_DEV_ATTRIB(max_unmap_block_desc_count
);
673 SE_DEV_ATTR(max_unmap_block_desc_count
, S_IRUGO
| S_IWUSR
);
675 DEF_DEV_ATTRIB(unmap_granularity
);
676 SE_DEV_ATTR(unmap_granularity
, S_IRUGO
| S_IWUSR
);
678 DEF_DEV_ATTRIB(unmap_granularity_alignment
);
679 SE_DEV_ATTR(unmap_granularity_alignment
, S_IRUGO
| S_IWUSR
);
681 DEF_DEV_ATTRIB(max_write_same_len
);
682 SE_DEV_ATTR(max_write_same_len
, S_IRUGO
| S_IWUSR
);
684 CONFIGFS_EATTR_OPS(target_core_dev_attrib
, se_dev_attrib
, da_group
);
686 static struct configfs_attribute
*target_core_dev_attrib_attrs
[] = {
687 &target_core_dev_attrib_emulate_model_alias
.attr
,
688 &target_core_dev_attrib_emulate_dpo
.attr
,
689 &target_core_dev_attrib_emulate_fua_write
.attr
,
690 &target_core_dev_attrib_emulate_fua_read
.attr
,
691 &target_core_dev_attrib_emulate_write_cache
.attr
,
692 &target_core_dev_attrib_emulate_ua_intlck_ctrl
.attr
,
693 &target_core_dev_attrib_emulate_tas
.attr
,
694 &target_core_dev_attrib_emulate_tpu
.attr
,
695 &target_core_dev_attrib_emulate_tpws
.attr
,
696 &target_core_dev_attrib_enforce_pr_isids
.attr
,
697 &target_core_dev_attrib_is_nonrot
.attr
,
698 &target_core_dev_attrib_emulate_rest_reord
.attr
,
699 &target_core_dev_attrib_hw_block_size
.attr
,
700 &target_core_dev_attrib_block_size
.attr
,
701 &target_core_dev_attrib_hw_max_sectors
.attr
,
702 &target_core_dev_attrib_fabric_max_sectors
.attr
,
703 &target_core_dev_attrib_optimal_sectors
.attr
,
704 &target_core_dev_attrib_hw_queue_depth
.attr
,
705 &target_core_dev_attrib_queue_depth
.attr
,
706 &target_core_dev_attrib_max_unmap_lba_count
.attr
,
707 &target_core_dev_attrib_max_unmap_block_desc_count
.attr
,
708 &target_core_dev_attrib_unmap_granularity
.attr
,
709 &target_core_dev_attrib_unmap_granularity_alignment
.attr
,
710 &target_core_dev_attrib_max_write_same_len
.attr
,
714 static struct configfs_item_operations target_core_dev_attrib_ops
= {
715 .show_attribute
= target_core_dev_attrib_attr_show
,
716 .store_attribute
= target_core_dev_attrib_attr_store
,
719 static struct config_item_type target_core_dev_attrib_cit
= {
720 .ct_item_ops
= &target_core_dev_attrib_ops
,
721 .ct_attrs
= target_core_dev_attrib_attrs
,
722 .ct_owner
= THIS_MODULE
,
725 /* End functions for struct config_item_type target_core_dev_attrib_cit */
727 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
729 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn
, t10_wwn
);
730 #define SE_DEV_WWN_ATTR(_name, _mode) \
731 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
732 __CONFIGFS_EATTR(_name, _mode, \
733 target_core_dev_wwn_show_attr_##_name, \
734 target_core_dev_wwn_store_attr_##_name);
736 #define SE_DEV_WWN_ATTR_RO(_name); \
738 static struct target_core_dev_wwn_attribute \
739 target_core_dev_wwn_##_name = \
740 __CONFIGFS_EATTR_RO(_name, \
741 target_core_dev_wwn_show_attr_##_name); \
745 * VPD page 0x80 Unit serial
747 static ssize_t
target_core_dev_wwn_show_attr_vpd_unit_serial(
748 struct t10_wwn
*t10_wwn
,
751 return sprintf(page
, "T10 VPD Unit Serial Number: %s\n",
752 &t10_wwn
->unit_serial
[0]);
755 static ssize_t
target_core_dev_wwn_store_attr_vpd_unit_serial(
756 struct t10_wwn
*t10_wwn
,
760 struct se_device
*dev
= t10_wwn
->t10_dev
;
761 unsigned char buf
[INQUIRY_VPD_SERIAL_LEN
];
764 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
765 * from the struct scsi_device level firmware, do not allow
766 * VPD Unit Serial to be emulated.
768 * Note this struct scsi_device could also be emulating VPD
769 * information from its drivers/scsi LLD. But for now we assume
770 * it is doing 'the right thing' wrt a world wide unique
771 * VPD Unit Serial Number that OS dependent multipath can depend on.
773 if (dev
->dev_flags
& DF_FIRMWARE_VPD_UNIT_SERIAL
) {
774 pr_err("Underlying SCSI device firmware provided VPD"
775 " Unit Serial, ignoring request\n");
779 if (strlen(page
) >= INQUIRY_VPD_SERIAL_LEN
) {
780 pr_err("Emulated VPD Unit Serial exceeds"
781 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN
);
785 * Check to see if any active $FABRIC_MOD exports exist. If they
786 * do exist, fail here as changing this information on the fly
787 * (underneath the initiator side OS dependent multipath code)
788 * could cause negative effects.
790 if (dev
->export_count
) {
791 pr_err("Unable to set VPD Unit Serial while"
792 " active %d $FABRIC_MOD exports exist\n",
798 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
800 * Also, strip any newline added from the userspace
801 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
803 memset(buf
, 0, INQUIRY_VPD_SERIAL_LEN
);
804 snprintf(buf
, INQUIRY_VPD_SERIAL_LEN
, "%s", page
);
805 snprintf(dev
->t10_wwn
.unit_serial
, INQUIRY_VPD_SERIAL_LEN
,
806 "%s", strstrip(buf
));
807 dev
->dev_flags
|= DF_EMULATED_VPD_UNIT_SERIAL
;
809 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
810 " %s\n", dev
->t10_wwn
.unit_serial
);
815 SE_DEV_WWN_ATTR(vpd_unit_serial
, S_IRUGO
| S_IWUSR
);
818 * VPD page 0x83 Protocol Identifier
820 static ssize_t
target_core_dev_wwn_show_attr_vpd_protocol_identifier(
821 struct t10_wwn
*t10_wwn
,
825 unsigned char buf
[VPD_TMP_BUF_SIZE
];
828 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
830 spin_lock(&t10_wwn
->t10_vpd_lock
);
831 list_for_each_entry(vpd
, &t10_wwn
->t10_vpd_list
, vpd_list
) {
832 if (!vpd
->protocol_identifier_set
)
835 transport_dump_vpd_proto_id(vpd
, buf
, VPD_TMP_BUF_SIZE
);
837 if (len
+ strlen(buf
) >= PAGE_SIZE
)
840 len
+= sprintf(page
+len
, "%s", buf
);
842 spin_unlock(&t10_wwn
->t10_vpd_lock
);
847 static ssize_t
target_core_dev_wwn_store_attr_vpd_protocol_identifier(
848 struct t10_wwn
*t10_wwn
,
855 SE_DEV_WWN_ATTR(vpd_protocol_identifier
, S_IRUGO
| S_IWUSR
);
858 * Generic wrapper for dumping VPD identifiers by association.
860 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
861 static ssize_t target_core_dev_wwn_show_attr_##_name( \
862 struct t10_wwn *t10_wwn, \
865 struct t10_vpd *vpd; \
866 unsigned char buf[VPD_TMP_BUF_SIZE]; \
869 spin_lock(&t10_wwn->t10_vpd_lock); \
870 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
871 if (vpd->association != _assoc) \
874 memset(buf, 0, VPD_TMP_BUF_SIZE); \
875 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
876 if (len + strlen(buf) >= PAGE_SIZE) \
878 len += sprintf(page+len, "%s", buf); \
880 memset(buf, 0, VPD_TMP_BUF_SIZE); \
881 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
882 if (len + strlen(buf) >= PAGE_SIZE) \
884 len += sprintf(page+len, "%s", buf); \
886 memset(buf, 0, VPD_TMP_BUF_SIZE); \
887 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
888 if (len + strlen(buf) >= PAGE_SIZE) \
890 len += sprintf(page+len, "%s", buf); \
892 spin_unlock(&t10_wwn->t10_vpd_lock); \
898 * VPD page 0x83 Association: Logical Unit
900 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit
, 0x00);
902 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
903 struct t10_wwn
*t10_wwn
,
910 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit
, S_IRUGO
| S_IWUSR
);
913 * VPD page 0x83 Association: Target Port
915 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port
, 0x10);
917 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_target_port(
918 struct t10_wwn
*t10_wwn
,
925 SE_DEV_WWN_ATTR(vpd_assoc_target_port
, S_IRUGO
| S_IWUSR
);
928 * VPD page 0x83 Association: SCSI Target Device
930 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device
, 0x20);
932 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
933 struct t10_wwn
*t10_wwn
,
940 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device
, S_IRUGO
| S_IWUSR
);
942 CONFIGFS_EATTR_OPS(target_core_dev_wwn
, t10_wwn
, t10_wwn_group
);
944 static struct configfs_attribute
*target_core_dev_wwn_attrs
[] = {
945 &target_core_dev_wwn_vpd_unit_serial
.attr
,
946 &target_core_dev_wwn_vpd_protocol_identifier
.attr
,
947 &target_core_dev_wwn_vpd_assoc_logical_unit
.attr
,
948 &target_core_dev_wwn_vpd_assoc_target_port
.attr
,
949 &target_core_dev_wwn_vpd_assoc_scsi_target_device
.attr
,
953 static struct configfs_item_operations target_core_dev_wwn_ops
= {
954 .show_attribute
= target_core_dev_wwn_attr_show
,
955 .store_attribute
= target_core_dev_wwn_attr_store
,
958 static struct config_item_type target_core_dev_wwn_cit
= {
959 .ct_item_ops
= &target_core_dev_wwn_ops
,
960 .ct_attrs
= target_core_dev_wwn_attrs
,
961 .ct_owner
= THIS_MODULE
,
964 /* End functions for struct config_item_type target_core_dev_wwn_cit */
966 /* Start functions for struct config_item_type target_core_dev_pr_cit */
968 CONFIGFS_EATTR_STRUCT(target_core_dev_pr
, se_device
);
969 #define SE_DEV_PR_ATTR(_name, _mode) \
970 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
971 __CONFIGFS_EATTR(_name, _mode, \
972 target_core_dev_pr_show_attr_##_name, \
973 target_core_dev_pr_store_attr_##_name);
975 #define SE_DEV_PR_ATTR_RO(_name); \
976 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
977 __CONFIGFS_EATTR_RO(_name, \
978 target_core_dev_pr_show_attr_##_name);
980 static ssize_t
target_core_dev_pr_show_spc3_res(struct se_device
*dev
,
983 struct se_node_acl
*se_nacl
;
984 struct t10_pr_registration
*pr_reg
;
985 char i_buf
[PR_REG_ISID_ID_LEN
];
988 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
990 pr_reg
= dev
->dev_pr_res_holder
;
992 return sprintf(page
, "No SPC-3 Reservation holder\n");
994 se_nacl
= pr_reg
->pr_reg_nacl
;
995 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
998 return sprintf(page
, "SPC-3 Reservation: %s Initiator: %s%s\n",
999 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1000 se_nacl
->initiatorname
, (prf_isid
) ? &i_buf
[0] : "");
1003 static ssize_t
target_core_dev_pr_show_spc2_res(struct se_device
*dev
,
1006 struct se_node_acl
*se_nacl
;
1009 se_nacl
= dev
->dev_reserved_node_acl
;
1012 "SPC-2 Reservation: %s Initiator: %s\n",
1013 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
1014 se_nacl
->initiatorname
);
1016 len
= sprintf(page
, "No SPC-2 Reservation holder\n");
1021 static ssize_t
target_core_dev_pr_show_attr_res_holder(struct se_device
*dev
,
1026 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1027 return sprintf(page
, "Passthrough\n");
1029 spin_lock(&dev
->dev_reservation_lock
);
1030 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1031 ret
= target_core_dev_pr_show_spc2_res(dev
, page
);
1033 ret
= target_core_dev_pr_show_spc3_res(dev
, page
);
1034 spin_unlock(&dev
->dev_reservation_lock
);
1038 SE_DEV_PR_ATTR_RO(res_holder
);
1040 static ssize_t
target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1041 struct se_device
*dev
, char *page
)
1045 spin_lock(&dev
->dev_reservation_lock
);
1046 if (!dev
->dev_pr_res_holder
) {
1047 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1048 } else if (dev
->dev_pr_res_holder
->pr_reg_all_tg_pt
) {
1049 len
= sprintf(page
, "SPC-3 Reservation: All Target"
1050 " Ports registration\n");
1052 len
= sprintf(page
, "SPC-3 Reservation: Single"
1053 " Target Port registration\n");
1056 spin_unlock(&dev
->dev_reservation_lock
);
1060 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts
);
1062 static ssize_t
target_core_dev_pr_show_attr_res_pr_generation(
1063 struct se_device
*dev
, char *page
)
1065 return sprintf(page
, "0x%08x\n", dev
->t10_pr
.pr_generation
);
1068 SE_DEV_PR_ATTR_RO(res_pr_generation
);
1071 * res_pr_holder_tg_port
1073 static ssize_t
target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1074 struct se_device
*dev
, char *page
)
1076 struct se_node_acl
*se_nacl
;
1078 struct se_portal_group
*se_tpg
;
1079 struct t10_pr_registration
*pr_reg
;
1080 struct target_core_fabric_ops
*tfo
;
1083 spin_lock(&dev
->dev_reservation_lock
);
1084 pr_reg
= dev
->dev_pr_res_holder
;
1086 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1090 se_nacl
= pr_reg
->pr_reg_nacl
;
1091 se_tpg
= se_nacl
->se_tpg
;
1092 lun
= pr_reg
->pr_reg_tg_pt_lun
;
1093 tfo
= se_tpg
->se_tpg_tfo
;
1095 len
+= sprintf(page
+len
, "SPC-3 Reservation: %s"
1096 " Target Node Endpoint: %s\n", tfo
->get_fabric_name(),
1097 tfo
->tpg_get_wwn(se_tpg
));
1098 len
+= sprintf(page
+len
, "SPC-3 Reservation: Relative Port"
1099 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1100 " %s Logical Unit: %u\n", lun
->lun_sep
->sep_rtpi
,
1101 tfo
->get_fabric_name(), tfo
->tpg_get_tag(se_tpg
),
1102 tfo
->get_fabric_name(), lun
->unpacked_lun
);
1105 spin_unlock(&dev
->dev_reservation_lock
);
1109 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port
);
1111 static ssize_t
target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1112 struct se_device
*dev
, char *page
)
1114 struct target_core_fabric_ops
*tfo
;
1115 struct t10_pr_registration
*pr_reg
;
1116 unsigned char buf
[384];
1117 char i_buf
[PR_REG_ISID_ID_LEN
];
1119 int reg_count
= 0, prf_isid
;
1121 len
+= sprintf(page
+len
, "SPC-3 PR Registrations:\n");
1123 spin_lock(&dev
->t10_pr
.registration_lock
);
1124 list_for_each_entry(pr_reg
, &dev
->t10_pr
.registration_list
,
1127 memset(buf
, 0, 384);
1128 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1129 tfo
= pr_reg
->pr_reg_nacl
->se_tpg
->se_tpg_tfo
;
1130 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
1131 PR_REG_ISID_ID_LEN
);
1132 sprintf(buf
, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1133 tfo
->get_fabric_name(),
1134 pr_reg
->pr_reg_nacl
->initiatorname
, (prf_isid
) ?
1135 &i_buf
[0] : "", pr_reg
->pr_res_key
,
1136 pr_reg
->pr_res_generation
);
1138 if (len
+ strlen(buf
) >= PAGE_SIZE
)
1141 len
+= sprintf(page
+len
, "%s", buf
);
1144 spin_unlock(&dev
->t10_pr
.registration_lock
);
1147 len
+= sprintf(page
+len
, "None\n");
1152 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts
);
1154 static ssize_t
target_core_dev_pr_show_attr_res_pr_type(
1155 struct se_device
*dev
, char *page
)
1157 struct t10_pr_registration
*pr_reg
;
1160 spin_lock(&dev
->dev_reservation_lock
);
1161 pr_reg
= dev
->dev_pr_res_holder
;
1163 len
= sprintf(page
, "SPC-3 Reservation Type: %s\n",
1164 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
));
1166 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
1169 spin_unlock(&dev
->dev_reservation_lock
);
1173 SE_DEV_PR_ATTR_RO(res_pr_type
);
1175 static ssize_t
target_core_dev_pr_show_attr_res_type(
1176 struct se_device
*dev
, char *page
)
1178 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1179 return sprintf(page
, "SPC_PASSTHROUGH\n");
1180 else if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1181 return sprintf(page
, "SPC2_RESERVATIONS\n");
1183 return sprintf(page
, "SPC3_PERSISTENT_RESERVATIONS\n");
1186 SE_DEV_PR_ATTR_RO(res_type
);
1188 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_active(
1189 struct se_device
*dev
, char *page
)
1191 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1194 return sprintf(page
, "APTPL Bit Status: %s\n",
1195 (dev
->t10_pr
.pr_aptpl_active
) ? "Activated" : "Disabled");
1198 SE_DEV_PR_ATTR_RO(res_aptpl_active
);
1201 * res_aptpl_metadata
1203 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_metadata(
1204 struct se_device
*dev
, char *page
)
1206 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1209 return sprintf(page
, "Ready to process PR APTPL metadata..\n");
1213 Opt_initiator_fabric
, Opt_initiator_node
, Opt_initiator_sid
,
1214 Opt_sa_res_key
, Opt_res_holder
, Opt_res_type
, Opt_res_scope
,
1215 Opt_res_all_tg_pt
, Opt_mapped_lun
, Opt_target_fabric
,
1216 Opt_target_node
, Opt_tpgt
, Opt_port_rtpi
, Opt_target_lun
, Opt_err
1219 static match_table_t tokens
= {
1220 {Opt_initiator_fabric
, "initiator_fabric=%s"},
1221 {Opt_initiator_node
, "initiator_node=%s"},
1222 {Opt_initiator_sid
, "initiator_sid=%s"},
1223 {Opt_sa_res_key
, "sa_res_key=%s"},
1224 {Opt_res_holder
, "res_holder=%d"},
1225 {Opt_res_type
, "res_type=%d"},
1226 {Opt_res_scope
, "res_scope=%d"},
1227 {Opt_res_all_tg_pt
, "res_all_tg_pt=%d"},
1228 {Opt_mapped_lun
, "mapped_lun=%d"},
1229 {Opt_target_fabric
, "target_fabric=%s"},
1230 {Opt_target_node
, "target_node=%s"},
1231 {Opt_tpgt
, "tpgt=%d"},
1232 {Opt_port_rtpi
, "port_rtpi=%d"},
1233 {Opt_target_lun
, "target_lun=%d"},
1237 static ssize_t
target_core_dev_pr_store_attr_res_aptpl_metadata(
1238 struct se_device
*dev
,
1242 unsigned char *i_fabric
= NULL
, *i_port
= NULL
, *isid
= NULL
;
1243 unsigned char *t_fabric
= NULL
, *t_port
= NULL
;
1244 char *orig
, *ptr
, *arg_p
, *opts
;
1245 substring_t args
[MAX_OPT_ARGS
];
1246 unsigned long long tmp_ll
;
1248 u32 mapped_lun
= 0, target_lun
= 0;
1249 int ret
= -1, res_holder
= 0, all_tg_pt
= 0, arg
, token
;
1250 u16 port_rpti
= 0, tpgt
= 0;
1253 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1255 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1258 if (dev
->export_count
) {
1259 pr_debug("Unable to process APTPL metadata while"
1260 " active fabric exports exist\n");
1264 opts
= kstrdup(page
, GFP_KERNEL
);
1269 while ((ptr
= strsep(&opts
, ",\n")) != NULL
) {
1273 token
= match_token(ptr
, tokens
, args
);
1275 case Opt_initiator_fabric
:
1276 i_fabric
= match_strdup(&args
[0]);
1282 case Opt_initiator_node
:
1283 i_port
= match_strdup(&args
[0]);
1288 if (strlen(i_port
) >= PR_APTPL_MAX_IPORT_LEN
) {
1289 pr_err("APTPL metadata initiator_node="
1290 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1291 PR_APTPL_MAX_IPORT_LEN
);
1296 case Opt_initiator_sid
:
1297 isid
= match_strdup(&args
[0]);
1302 if (strlen(isid
) >= PR_REG_ISID_LEN
) {
1303 pr_err("APTPL metadata initiator_isid"
1304 "= exceeds PR_REG_ISID_LEN: %d\n",
1310 case Opt_sa_res_key
:
1311 arg_p
= match_strdup(&args
[0]);
1316 ret
= strict_strtoull(arg_p
, 0, &tmp_ll
);
1318 pr_err("strict_strtoull() failed for"
1322 sa_res_key
= (u64
)tmp_ll
;
1325 * PR APTPL Metadata for Reservation
1327 case Opt_res_holder
:
1328 match_int(args
, &arg
);
1332 match_int(args
, &arg
);
1336 match_int(args
, &arg
);
1339 case Opt_res_all_tg_pt
:
1340 match_int(args
, &arg
);
1341 all_tg_pt
= (int)arg
;
1343 case Opt_mapped_lun
:
1344 match_int(args
, &arg
);
1345 mapped_lun
= (u32
)arg
;
1348 * PR APTPL Metadata for Target Port
1350 case Opt_target_fabric
:
1351 t_fabric
= match_strdup(&args
[0]);
1357 case Opt_target_node
:
1358 t_port
= match_strdup(&args
[0]);
1363 if (strlen(t_port
) >= PR_APTPL_MAX_TPORT_LEN
) {
1364 pr_err("APTPL metadata target_node="
1365 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1366 PR_APTPL_MAX_TPORT_LEN
);
1372 match_int(args
, &arg
);
1376 match_int(args
, &arg
);
1377 port_rpti
= (u16
)arg
;
1379 case Opt_target_lun
:
1380 match_int(args
, &arg
);
1381 target_lun
= (u32
)arg
;
1388 if (!i_port
|| !t_port
|| !sa_res_key
) {
1389 pr_err("Illegal parameters for APTPL registration\n");
1394 if (res_holder
&& !(type
)) {
1395 pr_err("Illegal PR type: 0x%02x for reservation"
1401 ret
= core_scsi3_alloc_aptpl_registration(&dev
->t10_pr
, sa_res_key
,
1402 i_port
, isid
, mapped_lun
, t_port
, tpgt
, target_lun
,
1403 res_holder
, all_tg_pt
, type
);
1411 return (ret
== 0) ? count
: ret
;
1414 SE_DEV_PR_ATTR(res_aptpl_metadata
, S_IRUGO
| S_IWUSR
);
1416 CONFIGFS_EATTR_OPS(target_core_dev_pr
, se_device
, dev_pr_group
);
1418 static struct configfs_attribute
*target_core_dev_pr_attrs
[] = {
1419 &target_core_dev_pr_res_holder
.attr
,
1420 &target_core_dev_pr_res_pr_all_tgt_pts
.attr
,
1421 &target_core_dev_pr_res_pr_generation
.attr
,
1422 &target_core_dev_pr_res_pr_holder_tg_port
.attr
,
1423 &target_core_dev_pr_res_pr_registered_i_pts
.attr
,
1424 &target_core_dev_pr_res_pr_type
.attr
,
1425 &target_core_dev_pr_res_type
.attr
,
1426 &target_core_dev_pr_res_aptpl_active
.attr
,
1427 &target_core_dev_pr_res_aptpl_metadata
.attr
,
1431 static struct configfs_item_operations target_core_dev_pr_ops
= {
1432 .show_attribute
= target_core_dev_pr_attr_show
,
1433 .store_attribute
= target_core_dev_pr_attr_store
,
1436 static struct config_item_type target_core_dev_pr_cit
= {
1437 .ct_item_ops
= &target_core_dev_pr_ops
,
1438 .ct_attrs
= target_core_dev_pr_attrs
,
1439 .ct_owner
= THIS_MODULE
,
1442 /* End functions for struct config_item_type target_core_dev_pr_cit */
1444 /* Start functions for struct config_item_type target_core_dev_cit */
1446 static ssize_t
target_core_show_dev_info(void *p
, char *page
)
1448 struct se_device
*dev
= p
;
1449 struct se_subsystem_api
*t
= dev
->transport
;
1451 ssize_t read_bytes
= 0;
1453 transport_dump_dev_state(dev
, page
, &bl
);
1455 read_bytes
+= t
->show_configfs_dev_params(dev
, page
+read_bytes
);
1459 static struct target_core_configfs_attribute target_core_attr_dev_info
= {
1460 .attr
= { .ca_owner
= THIS_MODULE
,
1462 .ca_mode
= S_IRUGO
},
1463 .show
= target_core_show_dev_info
,
1467 static ssize_t
target_core_store_dev_control(
1472 struct se_device
*dev
= p
;
1473 struct se_subsystem_api
*t
= dev
->transport
;
1475 return t
->set_configfs_dev_params(dev
, page
, count
);
1478 static struct target_core_configfs_attribute target_core_attr_dev_control
= {
1479 .attr
= { .ca_owner
= THIS_MODULE
,
1480 .ca_name
= "control",
1481 .ca_mode
= S_IWUSR
},
1483 .store
= target_core_store_dev_control
,
1486 static ssize_t
target_core_show_dev_alias(void *p
, char *page
)
1488 struct se_device
*dev
= p
;
1490 if (!(dev
->dev_flags
& DF_USING_ALIAS
))
1493 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->dev_alias
);
1496 static ssize_t
target_core_store_dev_alias(
1501 struct se_device
*dev
= p
;
1502 struct se_hba
*hba
= dev
->se_hba
;
1505 if (count
> (SE_DEV_ALIAS_LEN
-1)) {
1506 pr_err("alias count: %d exceeds"
1507 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count
,
1508 SE_DEV_ALIAS_LEN
-1);
1512 read_bytes
= snprintf(&dev
->dev_alias
[0], SE_DEV_ALIAS_LEN
, "%s", page
);
1515 if (dev
->dev_alias
[read_bytes
- 1] == '\n')
1516 dev
->dev_alias
[read_bytes
- 1] = '\0';
1518 dev
->dev_flags
|= DF_USING_ALIAS
;
1520 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1521 config_item_name(&hba
->hba_group
.cg_item
),
1522 config_item_name(&dev
->dev_group
.cg_item
),
1528 static struct target_core_configfs_attribute target_core_attr_dev_alias
= {
1529 .attr
= { .ca_owner
= THIS_MODULE
,
1531 .ca_mode
= S_IRUGO
| S_IWUSR
},
1532 .show
= target_core_show_dev_alias
,
1533 .store
= target_core_store_dev_alias
,
1536 static ssize_t
target_core_show_dev_udev_path(void *p
, char *page
)
1538 struct se_device
*dev
= p
;
1540 if (!(dev
->dev_flags
& DF_USING_UDEV_PATH
))
1543 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->udev_path
);
1546 static ssize_t
target_core_store_dev_udev_path(
1551 struct se_device
*dev
= p
;
1552 struct se_hba
*hba
= dev
->se_hba
;
1555 if (count
> (SE_UDEV_PATH_LEN
-1)) {
1556 pr_err("udev_path count: %d exceeds"
1557 " SE_UDEV_PATH_LEN-1: %u\n", (int)count
,
1558 SE_UDEV_PATH_LEN
-1);
1562 read_bytes
= snprintf(&dev
->udev_path
[0], SE_UDEV_PATH_LEN
,
1566 if (dev
->udev_path
[read_bytes
- 1] == '\n')
1567 dev
->udev_path
[read_bytes
- 1] = '\0';
1569 dev
->dev_flags
|= DF_USING_UDEV_PATH
;
1571 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1572 config_item_name(&hba
->hba_group
.cg_item
),
1573 config_item_name(&dev
->dev_group
.cg_item
),
1579 static struct target_core_configfs_attribute target_core_attr_dev_udev_path
= {
1580 .attr
= { .ca_owner
= THIS_MODULE
,
1581 .ca_name
= "udev_path",
1582 .ca_mode
= S_IRUGO
| S_IWUSR
},
1583 .show
= target_core_show_dev_udev_path
,
1584 .store
= target_core_store_dev_udev_path
,
1587 static ssize_t
target_core_show_dev_enable(void *p
, char *page
)
1589 struct se_device
*dev
= p
;
1591 return snprintf(page
, PAGE_SIZE
, "%d\n", !!(dev
->dev_flags
& DF_CONFIGURED
));
1594 static ssize_t
target_core_store_dev_enable(
1599 struct se_device
*dev
= p
;
1603 ptr
= strstr(page
, "1");
1605 pr_err("For dev_enable ops, only valid value"
1610 ret
= target_configure_device(dev
);
1616 static struct target_core_configfs_attribute target_core_attr_dev_enable
= {
1617 .attr
= { .ca_owner
= THIS_MODULE
,
1618 .ca_name
= "enable",
1619 .ca_mode
= S_IRUGO
| S_IWUSR
},
1620 .show
= target_core_show_dev_enable
,
1621 .store
= target_core_store_dev_enable
,
1624 static ssize_t
target_core_show_alua_lu_gp(void *p
, char *page
)
1626 struct se_device
*dev
= p
;
1627 struct config_item
*lu_ci
;
1628 struct t10_alua_lu_gp
*lu_gp
;
1629 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1632 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1636 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1637 lu_gp
= lu_gp_mem
->lu_gp
;
1639 lu_ci
= &lu_gp
->lu_gp_group
.cg_item
;
1640 len
+= sprintf(page
, "LU Group Alias: %s\nLU Group ID: %hu\n",
1641 config_item_name(lu_ci
), lu_gp
->lu_gp_id
);
1643 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1648 static ssize_t
target_core_store_alua_lu_gp(
1653 struct se_device
*dev
= p
;
1654 struct se_hba
*hba
= dev
->se_hba
;
1655 struct t10_alua_lu_gp
*lu_gp
= NULL
, *lu_gp_new
= NULL
;
1656 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1657 unsigned char buf
[LU_GROUP_NAME_BUF
];
1660 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1664 if (count
> LU_GROUP_NAME_BUF
) {
1665 pr_err("ALUA LU Group Alias too large!\n");
1668 memset(buf
, 0, LU_GROUP_NAME_BUF
);
1669 memcpy(buf
, page
, count
);
1671 * Any ALUA logical unit alias besides "NULL" means we will be
1672 * making a new group association.
1674 if (strcmp(strstrip(buf
), "NULL")) {
1676 * core_alua_get_lu_gp_by_name() will increment reference to
1677 * struct t10_alua_lu_gp. This reference is released with
1678 * core_alua_get_lu_gp_by_name below().
1680 lu_gp_new
= core_alua_get_lu_gp_by_name(strstrip(buf
));
1685 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1686 lu_gp
= lu_gp_mem
->lu_gp
;
1689 * Clearing an existing lu_gp association, and replacing
1693 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1694 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1696 config_item_name(&hba
->hba_group
.cg_item
),
1697 config_item_name(&dev
->dev_group
.cg_item
),
1698 config_item_name(&lu_gp
->lu_gp_group
.cg_item
),
1701 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1702 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1707 * Removing existing association of lu_gp_mem with lu_gp
1709 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1713 * Associate lu_gp_mem with lu_gp_new.
1715 __core_alua_attach_lu_gp_mem(lu_gp_mem
, lu_gp_new
);
1716 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1718 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1719 " core/alua/lu_gps/%s, ID: %hu\n",
1720 (move
) ? "Moving" : "Adding",
1721 config_item_name(&hba
->hba_group
.cg_item
),
1722 config_item_name(&dev
->dev_group
.cg_item
),
1723 config_item_name(&lu_gp_new
->lu_gp_group
.cg_item
),
1724 lu_gp_new
->lu_gp_id
);
1726 core_alua_put_lu_gp_from_name(lu_gp_new
);
1730 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp
= {
1731 .attr
= { .ca_owner
= THIS_MODULE
,
1732 .ca_name
= "alua_lu_gp",
1733 .ca_mode
= S_IRUGO
| S_IWUSR
},
1734 .show
= target_core_show_alua_lu_gp
,
1735 .store
= target_core_store_alua_lu_gp
,
1738 static struct configfs_attribute
*lio_core_dev_attrs
[] = {
1739 &target_core_attr_dev_info
.attr
,
1740 &target_core_attr_dev_control
.attr
,
1741 &target_core_attr_dev_alias
.attr
,
1742 &target_core_attr_dev_udev_path
.attr
,
1743 &target_core_attr_dev_enable
.attr
,
1744 &target_core_attr_dev_alua_lu_gp
.attr
,
1748 static void target_core_dev_release(struct config_item
*item
)
1750 struct config_group
*dev_cg
= to_config_group(item
);
1751 struct se_device
*dev
=
1752 container_of(dev_cg
, struct se_device
, dev_group
);
1754 kfree(dev_cg
->default_groups
);
1755 target_free_device(dev
);
1758 static ssize_t
target_core_dev_show(struct config_item
*item
,
1759 struct configfs_attribute
*attr
,
1762 struct config_group
*dev_cg
= to_config_group(item
);
1763 struct se_device
*dev
=
1764 container_of(dev_cg
, struct se_device
, dev_group
);
1765 struct target_core_configfs_attribute
*tc_attr
= container_of(
1766 attr
, struct target_core_configfs_attribute
, attr
);
1771 return tc_attr
->show(dev
, page
);
1774 static ssize_t
target_core_dev_store(struct config_item
*item
,
1775 struct configfs_attribute
*attr
,
1776 const char *page
, size_t count
)
1778 struct config_group
*dev_cg
= to_config_group(item
);
1779 struct se_device
*dev
=
1780 container_of(dev_cg
, struct se_device
, dev_group
);
1781 struct target_core_configfs_attribute
*tc_attr
= container_of(
1782 attr
, struct target_core_configfs_attribute
, attr
);
1784 if (!tc_attr
->store
)
1787 return tc_attr
->store(dev
, page
, count
);
1790 static struct configfs_item_operations target_core_dev_item_ops
= {
1791 .release
= target_core_dev_release
,
1792 .show_attribute
= target_core_dev_show
,
1793 .store_attribute
= target_core_dev_store
,
1796 static struct config_item_type target_core_dev_cit
= {
1797 .ct_item_ops
= &target_core_dev_item_ops
,
1798 .ct_attrs
= lio_core_dev_attrs
,
1799 .ct_owner
= THIS_MODULE
,
1802 /* End functions for struct config_item_type target_core_dev_cit */
1804 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1806 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp
, t10_alua_lu_gp
);
1807 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1808 static struct target_core_alua_lu_gp_attribute \
1809 target_core_alua_lu_gp_##_name = \
1810 __CONFIGFS_EATTR(_name, _mode, \
1811 target_core_alua_lu_gp_show_attr_##_name, \
1812 target_core_alua_lu_gp_store_attr_##_name);
1814 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1815 static struct target_core_alua_lu_gp_attribute \
1816 target_core_alua_lu_gp_##_name = \
1817 __CONFIGFS_EATTR_RO(_name, \
1818 target_core_alua_lu_gp_show_attr_##_name);
1823 static ssize_t
target_core_alua_lu_gp_show_attr_lu_gp_id(
1824 struct t10_alua_lu_gp
*lu_gp
,
1827 if (!lu_gp
->lu_gp_valid_id
)
1830 return sprintf(page
, "%hu\n", lu_gp
->lu_gp_id
);
1833 static ssize_t
target_core_alua_lu_gp_store_attr_lu_gp_id(
1834 struct t10_alua_lu_gp
*lu_gp
,
1838 struct config_group
*alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
1839 unsigned long lu_gp_id
;
1842 ret
= strict_strtoul(page
, 0, &lu_gp_id
);
1844 pr_err("strict_strtoul() returned %d for"
1845 " lu_gp_id\n", ret
);
1848 if (lu_gp_id
> 0x0000ffff) {
1849 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1850 " 0x0000ffff\n", lu_gp_id
);
1854 ret
= core_alua_set_lu_gp_id(lu_gp
, (u16
)lu_gp_id
);
1858 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1859 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1860 config_item_name(&alua_lu_gp_cg
->cg_item
),
1866 SE_DEV_ALUA_LU_ATTR(lu_gp_id
, S_IRUGO
| S_IWUSR
);
1871 static ssize_t
target_core_alua_lu_gp_show_attr_members(
1872 struct t10_alua_lu_gp
*lu_gp
,
1875 struct se_device
*dev
;
1877 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1878 ssize_t len
= 0, cur_len
;
1879 unsigned char buf
[LU_GROUP_NAME_BUF
];
1881 memset(buf
, 0, LU_GROUP_NAME_BUF
);
1883 spin_lock(&lu_gp
->lu_gp_lock
);
1884 list_for_each_entry(lu_gp_mem
, &lu_gp
->lu_gp_mem_list
, lu_gp_mem_list
) {
1885 dev
= lu_gp_mem
->lu_gp_mem_dev
;
1888 cur_len
= snprintf(buf
, LU_GROUP_NAME_BUF
, "%s/%s\n",
1889 config_item_name(&hba
->hba_group
.cg_item
),
1890 config_item_name(&dev
->dev_group
.cg_item
));
1891 cur_len
++; /* Extra byte for NULL terminator */
1893 if ((cur_len
+ len
) > PAGE_SIZE
) {
1894 pr_warn("Ran out of lu_gp_show_attr"
1895 "_members buffer\n");
1898 memcpy(page
+len
, buf
, cur_len
);
1901 spin_unlock(&lu_gp
->lu_gp_lock
);
1906 SE_DEV_ALUA_LU_ATTR_RO(members
);
1908 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp
, t10_alua_lu_gp
, lu_gp_group
);
1910 static struct configfs_attribute
*target_core_alua_lu_gp_attrs
[] = {
1911 &target_core_alua_lu_gp_lu_gp_id
.attr
,
1912 &target_core_alua_lu_gp_members
.attr
,
1916 static void target_core_alua_lu_gp_release(struct config_item
*item
)
1918 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
1919 struct t10_alua_lu_gp
, lu_gp_group
);
1921 core_alua_free_lu_gp(lu_gp
);
1924 static struct configfs_item_operations target_core_alua_lu_gp_ops
= {
1925 .release
= target_core_alua_lu_gp_release
,
1926 .show_attribute
= target_core_alua_lu_gp_attr_show
,
1927 .store_attribute
= target_core_alua_lu_gp_attr_store
,
1930 static struct config_item_type target_core_alua_lu_gp_cit
= {
1931 .ct_item_ops
= &target_core_alua_lu_gp_ops
,
1932 .ct_attrs
= target_core_alua_lu_gp_attrs
,
1933 .ct_owner
= THIS_MODULE
,
1936 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1938 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1940 static struct config_group
*target_core_alua_create_lu_gp(
1941 struct config_group
*group
,
1944 struct t10_alua_lu_gp
*lu_gp
;
1945 struct config_group
*alua_lu_gp_cg
= NULL
;
1946 struct config_item
*alua_lu_gp_ci
= NULL
;
1948 lu_gp
= core_alua_allocate_lu_gp(name
, 0);
1952 alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
1953 alua_lu_gp_ci
= &alua_lu_gp_cg
->cg_item
;
1955 config_group_init_type_name(alua_lu_gp_cg
, name
,
1956 &target_core_alua_lu_gp_cit
);
1958 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1959 " Group: core/alua/lu_gps/%s\n",
1960 config_item_name(alua_lu_gp_ci
));
1962 return alua_lu_gp_cg
;
1966 static void target_core_alua_drop_lu_gp(
1967 struct config_group
*group
,
1968 struct config_item
*item
)
1970 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
1971 struct t10_alua_lu_gp
, lu_gp_group
);
1973 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1974 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1975 config_item_name(item
), lu_gp
->lu_gp_id
);
1977 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1978 * -> target_core_alua_lu_gp_release()
1980 config_item_put(item
);
1983 static struct configfs_group_operations target_core_alua_lu_gps_group_ops
= {
1984 .make_group
= &target_core_alua_create_lu_gp
,
1985 .drop_item
= &target_core_alua_drop_lu_gp
,
1988 static struct config_item_type target_core_alua_lu_gps_cit
= {
1989 .ct_item_ops
= NULL
,
1990 .ct_group_ops
= &target_core_alua_lu_gps_group_ops
,
1991 .ct_owner
= THIS_MODULE
,
1994 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1996 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1998 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
);
1999 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2000 static struct target_core_alua_tg_pt_gp_attribute \
2001 target_core_alua_tg_pt_gp_##_name = \
2002 __CONFIGFS_EATTR(_name, _mode, \
2003 target_core_alua_tg_pt_gp_show_attr_##_name, \
2004 target_core_alua_tg_pt_gp_store_attr_##_name);
2006 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2007 static struct target_core_alua_tg_pt_gp_attribute \
2008 target_core_alua_tg_pt_gp_##_name = \
2009 __CONFIGFS_EATTR_RO(_name, \
2010 target_core_alua_tg_pt_gp_show_attr_##_name);
2015 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2016 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2019 return sprintf(page
, "%d\n",
2020 atomic_read(&tg_pt_gp
->tg_pt_gp_alua_access_state
));
2023 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2024 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2028 struct se_device
*dev
= tg_pt_gp
->tg_pt_gp_dev
;
2032 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2033 pr_err("Unable to do implict ALUA on non valid"
2034 " tg_pt_gp ID: %hu\n", tg_pt_gp
->tg_pt_gp_valid_id
);
2038 ret
= strict_strtoul(page
, 0, &tmp
);
2040 pr_err("Unable to extract new ALUA access state from"
2044 new_state
= (int)tmp
;
2046 if (!(tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_IMPLICT_ALUA
)) {
2047 pr_err("Unable to process implict configfs ALUA"
2048 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2052 ret
= core_alua_do_port_transition(tg_pt_gp
, dev
,
2053 NULL
, NULL
, new_state
, 0);
2054 return (!ret
) ? count
: -EINVAL
;
2057 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state
, S_IRUGO
| S_IWUSR
);
2060 * alua_access_status
2062 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2063 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2066 return sprintf(page
, "%s\n",
2067 core_alua_dump_status(tg_pt_gp
->tg_pt_gp_alua_access_status
));
2070 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2071 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2076 int new_status
, ret
;
2078 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2079 pr_err("Unable to do set ALUA access status on non"
2080 " valid tg_pt_gp ID: %hu\n",
2081 tg_pt_gp
->tg_pt_gp_valid_id
);
2085 ret
= strict_strtoul(page
, 0, &tmp
);
2087 pr_err("Unable to extract new ALUA access status"
2088 " from %s\n", page
);
2091 new_status
= (int)tmp
;
2093 if ((new_status
!= ALUA_STATUS_NONE
) &&
2094 (new_status
!= ALUA_STATUS_ALTERED_BY_EXPLICT_STPG
) &&
2095 (new_status
!= ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA
)) {
2096 pr_err("Illegal ALUA access status: 0x%02x\n",
2101 tg_pt_gp
->tg_pt_gp_alua_access_status
= new_status
;
2105 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status
, S_IRUGO
| S_IWUSR
);
2110 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2111 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2114 return core_alua_show_access_type(tg_pt_gp
, page
);
2117 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2118 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2122 return core_alua_store_access_type(tg_pt_gp
, page
, count
);
2125 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type
, S_IRUGO
| S_IWUSR
);
2128 * alua_write_metadata
2130 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2131 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2134 return sprintf(page
, "%d\n", tg_pt_gp
->tg_pt_gp_write_metadata
);
2137 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2138 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2145 ret
= strict_strtoul(page
, 0, &tmp
);
2147 pr_err("Unable to extract alua_write_metadata\n");
2151 if ((tmp
!= 0) && (tmp
!= 1)) {
2152 pr_err("Illegal value for alua_write_metadata:"
2156 tg_pt_gp
->tg_pt_gp_write_metadata
= (int)tmp
;
2161 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata
, S_IRUGO
| S_IWUSR
);
2168 static ssize_t
target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2169 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2172 return core_alua_show_nonop_delay_msecs(tg_pt_gp
, page
);
2176 static ssize_t
target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2177 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2181 return core_alua_store_nonop_delay_msecs(tg_pt_gp
, page
, count
);
2184 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs
, S_IRUGO
| S_IWUSR
);
2189 static ssize_t
target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2190 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2193 return core_alua_show_trans_delay_msecs(tg_pt_gp
, page
);
2196 static ssize_t
target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2197 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2201 return core_alua_store_trans_delay_msecs(tg_pt_gp
, page
, count
);
2204 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs
, S_IRUGO
| S_IWUSR
);
2207 * implict_trans_secs
2209 static ssize_t
target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2210 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2213 return core_alua_show_implict_trans_secs(tg_pt_gp
, page
);
2216 static ssize_t
target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2217 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2221 return core_alua_store_implict_trans_secs(tg_pt_gp
, page
, count
);
2224 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs
, S_IRUGO
| S_IWUSR
);
2230 static ssize_t
target_core_alua_tg_pt_gp_show_attr_preferred(
2231 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2234 return core_alua_show_preferred_bit(tg_pt_gp
, page
);
2237 static ssize_t
target_core_alua_tg_pt_gp_store_attr_preferred(
2238 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2242 return core_alua_store_preferred_bit(tg_pt_gp
, page
, count
);
2245 SE_DEV_ALUA_TG_PT_ATTR(preferred
, S_IRUGO
| S_IWUSR
);
2250 static ssize_t
target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2251 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2254 if (!tg_pt_gp
->tg_pt_gp_valid_id
)
2257 return sprintf(page
, "%hu\n", tg_pt_gp
->tg_pt_gp_id
);
2260 static ssize_t
target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2261 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2265 struct config_group
*alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2266 unsigned long tg_pt_gp_id
;
2269 ret
= strict_strtoul(page
, 0, &tg_pt_gp_id
);
2271 pr_err("strict_strtoul() returned %d for"
2272 " tg_pt_gp_id\n", ret
);
2275 if (tg_pt_gp_id
> 0x0000ffff) {
2276 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2277 " 0x0000ffff\n", tg_pt_gp_id
);
2281 ret
= core_alua_set_tg_pt_gp_id(tg_pt_gp
, (u16
)tg_pt_gp_id
);
2285 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2286 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2287 config_item_name(&alua_tg_pt_gp_cg
->cg_item
),
2288 tg_pt_gp
->tg_pt_gp_id
);
2293 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id
, S_IRUGO
| S_IWUSR
);
2298 static ssize_t
target_core_alua_tg_pt_gp_show_attr_members(
2299 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2302 struct se_port
*port
;
2303 struct se_portal_group
*tpg
;
2305 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
2306 ssize_t len
= 0, cur_len
;
2307 unsigned char buf
[TG_PT_GROUP_NAME_BUF
];
2309 memset(buf
, 0, TG_PT_GROUP_NAME_BUF
);
2311 spin_lock(&tg_pt_gp
->tg_pt_gp_lock
);
2312 list_for_each_entry(tg_pt_gp_mem
, &tg_pt_gp
->tg_pt_gp_mem_list
,
2313 tg_pt_gp_mem_list
) {
2314 port
= tg_pt_gp_mem
->tg_pt
;
2315 tpg
= port
->sep_tpg
;
2316 lun
= port
->sep_lun
;
2318 cur_len
= snprintf(buf
, TG_PT_GROUP_NAME_BUF
, "%s/%s/tpgt_%hu"
2319 "/%s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
2320 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
),
2321 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
2322 config_item_name(&lun
->lun_group
.cg_item
));
2323 cur_len
++; /* Extra byte for NULL terminator */
2325 if ((cur_len
+ len
) > PAGE_SIZE
) {
2326 pr_warn("Ran out of lu_gp_show_attr"
2327 "_members buffer\n");
2330 memcpy(page
+len
, buf
, cur_len
);
2333 spin_unlock(&tg_pt_gp
->tg_pt_gp_lock
);
2338 SE_DEV_ALUA_TG_PT_ATTR_RO(members
);
2340 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
,
2343 static struct configfs_attribute
*target_core_alua_tg_pt_gp_attrs
[] = {
2344 &target_core_alua_tg_pt_gp_alua_access_state
.attr
,
2345 &target_core_alua_tg_pt_gp_alua_access_status
.attr
,
2346 &target_core_alua_tg_pt_gp_alua_access_type
.attr
,
2347 &target_core_alua_tg_pt_gp_alua_write_metadata
.attr
,
2348 &target_core_alua_tg_pt_gp_nonop_delay_msecs
.attr
,
2349 &target_core_alua_tg_pt_gp_trans_delay_msecs
.attr
,
2350 &target_core_alua_tg_pt_gp_implict_trans_secs
.attr
,
2351 &target_core_alua_tg_pt_gp_preferred
.attr
,
2352 &target_core_alua_tg_pt_gp_tg_pt_gp_id
.attr
,
2353 &target_core_alua_tg_pt_gp_members
.attr
,
2357 static void target_core_alua_tg_pt_gp_release(struct config_item
*item
)
2359 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2360 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2362 core_alua_free_tg_pt_gp(tg_pt_gp
);
2365 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops
= {
2366 .release
= target_core_alua_tg_pt_gp_release
,
2367 .show_attribute
= target_core_alua_tg_pt_gp_attr_show
,
2368 .store_attribute
= target_core_alua_tg_pt_gp_attr_store
,
2371 static struct config_item_type target_core_alua_tg_pt_gp_cit
= {
2372 .ct_item_ops
= &target_core_alua_tg_pt_gp_ops
,
2373 .ct_attrs
= target_core_alua_tg_pt_gp_attrs
,
2374 .ct_owner
= THIS_MODULE
,
2377 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2379 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2381 static struct config_group
*target_core_alua_create_tg_pt_gp(
2382 struct config_group
*group
,
2385 struct t10_alua
*alua
= container_of(group
, struct t10_alua
,
2386 alua_tg_pt_gps_group
);
2387 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2388 struct config_group
*alua_tg_pt_gp_cg
= NULL
;
2389 struct config_item
*alua_tg_pt_gp_ci
= NULL
;
2391 tg_pt_gp
= core_alua_allocate_tg_pt_gp(alua
->t10_dev
, name
, 0);
2395 alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2396 alua_tg_pt_gp_ci
= &alua_tg_pt_gp_cg
->cg_item
;
2398 config_group_init_type_name(alua_tg_pt_gp_cg
, name
,
2399 &target_core_alua_tg_pt_gp_cit
);
2401 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2402 " Group: alua/tg_pt_gps/%s\n",
2403 config_item_name(alua_tg_pt_gp_ci
));
2405 return alua_tg_pt_gp_cg
;
2408 static void target_core_alua_drop_tg_pt_gp(
2409 struct config_group
*group
,
2410 struct config_item
*item
)
2412 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2413 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2415 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2416 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2417 config_item_name(item
), tg_pt_gp
->tg_pt_gp_id
);
2419 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2420 * -> target_core_alua_tg_pt_gp_release().
2422 config_item_put(item
);
2425 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops
= {
2426 .make_group
= &target_core_alua_create_tg_pt_gp
,
2427 .drop_item
= &target_core_alua_drop_tg_pt_gp
,
2430 static struct config_item_type target_core_alua_tg_pt_gps_cit
= {
2431 .ct_group_ops
= &target_core_alua_tg_pt_gps_group_ops
,
2432 .ct_owner
= THIS_MODULE
,
2435 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2437 /* Start functions for struct config_item_type target_core_alua_cit */
2440 * target_core_alua_cit is a ConfigFS group that lives under
2441 * /sys/kernel/config/target/core/alua. There are default groups
2442 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2443 * target_core_alua_cit in target_core_init_configfs() below.
2445 static struct config_item_type target_core_alua_cit
= {
2446 .ct_item_ops
= NULL
,
2448 .ct_owner
= THIS_MODULE
,
2451 /* End functions for struct config_item_type target_core_alua_cit */
2453 /* Start functions for struct config_item_type target_core_stat_cit */
2455 static struct config_group
*target_core_stat_mkdir(
2456 struct config_group
*group
,
2459 return ERR_PTR(-ENOSYS
);
2462 static void target_core_stat_rmdir(
2463 struct config_group
*group
,
2464 struct config_item
*item
)
2469 static struct configfs_group_operations target_core_stat_group_ops
= {
2470 .make_group
= &target_core_stat_mkdir
,
2471 .drop_item
= &target_core_stat_rmdir
,
2474 static struct config_item_type target_core_stat_cit
= {
2475 .ct_group_ops
= &target_core_stat_group_ops
,
2476 .ct_owner
= THIS_MODULE
,
2479 /* End functions for struct config_item_type target_core_stat_cit */
2481 /* Start functions for struct config_item_type target_core_hba_cit */
2483 static struct config_group
*target_core_make_subdev(
2484 struct config_group
*group
,
2487 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2488 struct se_subsystem_api
*t
;
2489 struct config_item
*hba_ci
= &group
->cg_item
;
2490 struct se_hba
*hba
= item_to_hba(hba_ci
);
2491 struct se_device
*dev
;
2492 struct config_group
*dev_cg
= NULL
, *tg_pt_gp_cg
= NULL
;
2493 struct config_group
*dev_stat_grp
= NULL
;
2494 int errno
= -ENOMEM
, ret
;
2496 ret
= mutex_lock_interruptible(&hba
->hba_access_mutex
);
2498 return ERR_PTR(ret
);
2500 * Locate the struct se_subsystem_api from parent's struct se_hba.
2504 dev
= target_alloc_device(hba
, name
);
2508 dev_cg
= &dev
->dev_group
;
2510 dev_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 6,
2512 if (!dev_cg
->default_groups
)
2513 goto out_free_device
;
2515 config_group_init_type_name(dev_cg
, name
, &target_core_dev_cit
);
2516 config_group_init_type_name(&dev
->dev_attrib
.da_group
, "attrib",
2517 &target_core_dev_attrib_cit
);
2518 config_group_init_type_name(&dev
->dev_pr_group
, "pr",
2519 &target_core_dev_pr_cit
);
2520 config_group_init_type_name(&dev
->t10_wwn
.t10_wwn_group
, "wwn",
2521 &target_core_dev_wwn_cit
);
2522 config_group_init_type_name(&dev
->t10_alua
.alua_tg_pt_gps_group
,
2523 "alua", &target_core_alua_tg_pt_gps_cit
);
2524 config_group_init_type_name(&dev
->dev_stat_grps
.stat_group
,
2525 "statistics", &target_core_stat_cit
);
2527 dev_cg
->default_groups
[0] = &dev
->dev_attrib
.da_group
;
2528 dev_cg
->default_groups
[1] = &dev
->dev_pr_group
;
2529 dev_cg
->default_groups
[2] = &dev
->t10_wwn
.t10_wwn_group
;
2530 dev_cg
->default_groups
[3] = &dev
->t10_alua
.alua_tg_pt_gps_group
;
2531 dev_cg
->default_groups
[4] = &dev
->dev_stat_grps
.stat_group
;
2532 dev_cg
->default_groups
[5] = NULL
;
2534 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2536 tg_pt_gp
= core_alua_allocate_tg_pt_gp(dev
, "default_tg_pt_gp", 1);
2538 goto out_free_dev_cg_default_groups
;
2539 dev
->t10_alua
.default_tg_pt_gp
= tg_pt_gp
;
2541 tg_pt_gp_cg
= &dev
->t10_alua
.alua_tg_pt_gps_group
;
2542 tg_pt_gp_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2544 if (!tg_pt_gp_cg
->default_groups
) {
2545 pr_err("Unable to allocate tg_pt_gp_cg->"
2546 "default_groups\n");
2547 goto out_free_tg_pt_gp
;
2550 config_group_init_type_name(&tg_pt_gp
->tg_pt_gp_group
,
2551 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit
);
2552 tg_pt_gp_cg
->default_groups
[0] = &tg_pt_gp
->tg_pt_gp_group
;
2553 tg_pt_gp_cg
->default_groups
[1] = NULL
;
2555 * Add core/$HBA/$DEV/statistics/ default groups
2557 dev_stat_grp
= &dev
->dev_stat_grps
.stat_group
;
2558 dev_stat_grp
->default_groups
= kmalloc(sizeof(struct config_group
*) * 4,
2560 if (!dev_stat_grp
->default_groups
) {
2561 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2562 goto out_free_tg_pt_gp_cg_default_groups
;
2564 target_stat_setup_dev_default_groups(dev
);
2566 mutex_unlock(&hba
->hba_access_mutex
);
2569 out_free_tg_pt_gp_cg_default_groups
:
2570 kfree(tg_pt_gp_cg
->default_groups
);
2572 core_alua_free_tg_pt_gp(tg_pt_gp
);
2573 out_free_dev_cg_default_groups
:
2574 kfree(dev_cg
->default_groups
);
2576 target_free_device(dev
);
2578 mutex_unlock(&hba
->hba_access_mutex
);
2579 return ERR_PTR(errno
);
2582 static void target_core_drop_subdev(
2583 struct config_group
*group
,
2584 struct config_item
*item
)
2586 struct config_group
*dev_cg
= to_config_group(item
);
2587 struct se_device
*dev
=
2588 container_of(dev_cg
, struct se_device
, dev_group
);
2590 struct config_item
*df_item
;
2591 struct config_group
*tg_pt_gp_cg
, *dev_stat_grp
;
2594 hba
= item_to_hba(&dev
->se_hba
->hba_group
.cg_item
);
2596 mutex_lock(&hba
->hba_access_mutex
);
2598 dev_stat_grp
= &dev
->dev_stat_grps
.stat_group
;
2599 for (i
= 0; dev_stat_grp
->default_groups
[i
]; i
++) {
2600 df_item
= &dev_stat_grp
->default_groups
[i
]->cg_item
;
2601 dev_stat_grp
->default_groups
[i
] = NULL
;
2602 config_item_put(df_item
);
2604 kfree(dev_stat_grp
->default_groups
);
2606 tg_pt_gp_cg
= &dev
->t10_alua
.alua_tg_pt_gps_group
;
2607 for (i
= 0; tg_pt_gp_cg
->default_groups
[i
]; i
++) {
2608 df_item
= &tg_pt_gp_cg
->default_groups
[i
]->cg_item
;
2609 tg_pt_gp_cg
->default_groups
[i
] = NULL
;
2610 config_item_put(df_item
);
2612 kfree(tg_pt_gp_cg
->default_groups
);
2614 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2615 * directly from target_core_alua_tg_pt_gp_release().
2617 dev
->t10_alua
.default_tg_pt_gp
= NULL
;
2619 for (i
= 0; dev_cg
->default_groups
[i
]; i
++) {
2620 df_item
= &dev_cg
->default_groups
[i
]->cg_item
;
2621 dev_cg
->default_groups
[i
] = NULL
;
2622 config_item_put(df_item
);
2625 * se_dev is released from target_core_dev_item_ops->release()
2627 config_item_put(item
);
2628 mutex_unlock(&hba
->hba_access_mutex
);
2631 static struct configfs_group_operations target_core_hba_group_ops
= {
2632 .make_group
= target_core_make_subdev
,
2633 .drop_item
= target_core_drop_subdev
,
2636 CONFIGFS_EATTR_STRUCT(target_core_hba
, se_hba
);
2637 #define SE_HBA_ATTR(_name, _mode) \
2638 static struct target_core_hba_attribute \
2639 target_core_hba_##_name = \
2640 __CONFIGFS_EATTR(_name, _mode, \
2641 target_core_hba_show_attr_##_name, \
2642 target_core_hba_store_attr_##_name);
2644 #define SE_HBA_ATTR_RO(_name) \
2645 static struct target_core_hba_attribute \
2646 target_core_hba_##_name = \
2647 __CONFIGFS_EATTR_RO(_name, \
2648 target_core_hba_show_attr_##_name);
2650 static ssize_t
target_core_hba_show_attr_hba_info(
2654 return sprintf(page
, "HBA Index: %d plugin: %s version: %s\n",
2655 hba
->hba_id
, hba
->transport
->name
,
2656 TARGET_CORE_CONFIGFS_VERSION
);
2659 SE_HBA_ATTR_RO(hba_info
);
2661 static ssize_t
target_core_hba_show_attr_hba_mode(struct se_hba
*hba
,
2666 if (hba
->hba_flags
& HBA_FLAGS_PSCSI_MODE
)
2669 return sprintf(page
, "%d\n", hba_mode
);
2672 static ssize_t
target_core_hba_store_attr_hba_mode(struct se_hba
*hba
,
2673 const char *page
, size_t count
)
2675 struct se_subsystem_api
*transport
= hba
->transport
;
2676 unsigned long mode_flag
;
2679 if (transport
->pmode_enable_hba
== NULL
)
2682 ret
= strict_strtoul(page
, 0, &mode_flag
);
2684 pr_err("Unable to extract hba mode flag: %d\n", ret
);
2688 if (hba
->dev_count
) {
2689 pr_err("Unable to set hba_mode with active devices\n");
2693 ret
= transport
->pmode_enable_hba(hba
, mode_flag
);
2697 hba
->hba_flags
|= HBA_FLAGS_PSCSI_MODE
;
2699 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
2704 SE_HBA_ATTR(hba_mode
, S_IRUGO
| S_IWUSR
);
2706 CONFIGFS_EATTR_OPS(target_core_hba
, se_hba
, hba_group
);
2708 static void target_core_hba_release(struct config_item
*item
)
2710 struct se_hba
*hba
= container_of(to_config_group(item
),
2711 struct se_hba
, hba_group
);
2712 core_delete_hba(hba
);
2715 static struct configfs_attribute
*target_core_hba_attrs
[] = {
2716 &target_core_hba_hba_info
.attr
,
2717 &target_core_hba_hba_mode
.attr
,
2721 static struct configfs_item_operations target_core_hba_item_ops
= {
2722 .release
= target_core_hba_release
,
2723 .show_attribute
= target_core_hba_attr_show
,
2724 .store_attribute
= target_core_hba_attr_store
,
2727 static struct config_item_type target_core_hba_cit
= {
2728 .ct_item_ops
= &target_core_hba_item_ops
,
2729 .ct_group_ops
= &target_core_hba_group_ops
,
2730 .ct_attrs
= target_core_hba_attrs
,
2731 .ct_owner
= THIS_MODULE
,
2734 static struct config_group
*target_core_call_addhbatotarget(
2735 struct config_group
*group
,
2738 char *se_plugin_str
, *str
, *str2
;
2740 char buf
[TARGET_CORE_NAME_MAX_LEN
];
2741 unsigned long plugin_dep_id
= 0;
2744 memset(buf
, 0, TARGET_CORE_NAME_MAX_LEN
);
2745 if (strlen(name
) >= TARGET_CORE_NAME_MAX_LEN
) {
2746 pr_err("Passed *name strlen(): %d exceeds"
2747 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name
),
2748 TARGET_CORE_NAME_MAX_LEN
);
2749 return ERR_PTR(-ENAMETOOLONG
);
2751 snprintf(buf
, TARGET_CORE_NAME_MAX_LEN
, "%s", name
);
2753 str
= strstr(buf
, "_");
2755 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2756 return ERR_PTR(-EINVAL
);
2758 se_plugin_str
= buf
;
2760 * Special case for subsystem plugins that have "_" in their names.
2761 * Namely rd_direct and rd_mcp..
2763 str2
= strstr(str
+1, "_");
2765 *str2
= '\0'; /* Terminate for *se_plugin_str */
2766 str2
++; /* Skip to start of plugin dependent ID */
2769 *str
= '\0'; /* Terminate for *se_plugin_str */
2770 str
++; /* Skip to start of plugin dependent ID */
2773 ret
= strict_strtoul(str
, 0, &plugin_dep_id
);
2775 pr_err("strict_strtoul() returned %d for"
2776 " plugin_dep_id\n", ret
);
2777 return ERR_PTR(-EINVAL
);
2780 * Load up TCM subsystem plugins if they have not already been loaded.
2782 transport_subsystem_check_init();
2784 hba
= core_alloc_hba(se_plugin_str
, plugin_dep_id
, 0);
2786 return ERR_CAST(hba
);
2788 config_group_init_type_name(&hba
->hba_group
, name
,
2789 &target_core_hba_cit
);
2791 return &hba
->hba_group
;
2794 static void target_core_call_delhbafromtarget(
2795 struct config_group
*group
,
2796 struct config_item
*item
)
2799 * core_delete_hba() is called from target_core_hba_item_ops->release()
2800 * -> target_core_hba_release()
2802 config_item_put(item
);
2805 static struct configfs_group_operations target_core_group_ops
= {
2806 .make_group
= target_core_call_addhbatotarget
,
2807 .drop_item
= target_core_call_delhbafromtarget
,
2810 static struct config_item_type target_core_cit
= {
2811 .ct_item_ops
= NULL
,
2812 .ct_group_ops
= &target_core_group_ops
,
2814 .ct_owner
= THIS_MODULE
,
2817 /* Stop functions for struct config_item_type target_core_hba_cit */
2819 static int __init
target_core_init_configfs(void)
2821 struct config_group
*target_cg
, *hba_cg
= NULL
, *alua_cg
= NULL
;
2822 struct config_group
*lu_gp_cg
= NULL
;
2823 struct configfs_subsystem
*subsys
;
2824 struct t10_alua_lu_gp
*lu_gp
;
2827 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2828 " Engine: %s on %s/%s on "UTS_RELEASE
"\n",
2829 TARGET_CORE_VERSION
, utsname()->sysname
, utsname()->machine
);
2831 subsys
= target_core_subsystem
[0];
2832 config_group_init(&subsys
->su_group
);
2833 mutex_init(&subsys
->su_mutex
);
2835 ret
= init_se_kmem_caches();
2839 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2840 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2842 target_cg
= &subsys
->su_group
;
2843 target_cg
->default_groups
= kmalloc(sizeof(struct config_group
) * 2,
2845 if (!target_cg
->default_groups
) {
2846 pr_err("Unable to allocate target_cg->default_groups\n");
2851 config_group_init_type_name(&target_core_hbagroup
,
2852 "core", &target_core_cit
);
2853 target_cg
->default_groups
[0] = &target_core_hbagroup
;
2854 target_cg
->default_groups
[1] = NULL
;
2856 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2858 hba_cg
= &target_core_hbagroup
;
2859 hba_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2861 if (!hba_cg
->default_groups
) {
2862 pr_err("Unable to allocate hba_cg->default_groups\n");
2866 config_group_init_type_name(&alua_group
,
2867 "alua", &target_core_alua_cit
);
2868 hba_cg
->default_groups
[0] = &alua_group
;
2869 hba_cg
->default_groups
[1] = NULL
;
2871 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2872 * groups under /sys/kernel/config/target/core/alua/
2874 alua_cg
= &alua_group
;
2875 alua_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2877 if (!alua_cg
->default_groups
) {
2878 pr_err("Unable to allocate alua_cg->default_groups\n");
2883 config_group_init_type_name(&alua_lu_gps_group
,
2884 "lu_gps", &target_core_alua_lu_gps_cit
);
2885 alua_cg
->default_groups
[0] = &alua_lu_gps_group
;
2886 alua_cg
->default_groups
[1] = NULL
;
2888 * Add core/alua/lu_gps/default_lu_gp
2890 lu_gp
= core_alua_allocate_lu_gp("default_lu_gp", 1);
2891 if (IS_ERR(lu_gp
)) {
2896 lu_gp_cg
= &alua_lu_gps_group
;
2897 lu_gp_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2899 if (!lu_gp_cg
->default_groups
) {
2900 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2905 config_group_init_type_name(&lu_gp
->lu_gp_group
, "default_lu_gp",
2906 &target_core_alua_lu_gp_cit
);
2907 lu_gp_cg
->default_groups
[0] = &lu_gp
->lu_gp_group
;
2908 lu_gp_cg
->default_groups
[1] = NULL
;
2909 default_lu_gp
= lu_gp
;
2911 * Register the target_core_mod subsystem with configfs.
2913 ret
= configfs_register_subsystem(subsys
);
2915 pr_err("Error %d while registering subsystem %s\n",
2916 ret
, subsys
->su_group
.cg_item
.ci_namebuf
);
2919 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2920 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION
" on %s/%s"
2921 " on "UTS_RELEASE
"\n", utsname()->sysname
, utsname()->machine
);
2923 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2925 ret
= rd_module_init();
2929 ret
= core_dev_setup_virtual_lun0();
2936 configfs_unregister_subsystem(subsys
);
2937 core_dev_release_virtual_lun0();
2940 if (default_lu_gp
) {
2941 core_alua_free_lu_gp(default_lu_gp
);
2942 default_lu_gp
= NULL
;
2945 kfree(lu_gp_cg
->default_groups
);
2947 kfree(alua_cg
->default_groups
);
2949 kfree(hba_cg
->default_groups
);
2950 kfree(target_cg
->default_groups
);
2951 release_se_kmem_caches();
2955 static void __exit
target_core_exit_configfs(void)
2957 struct configfs_subsystem
*subsys
;
2958 struct config_group
*hba_cg
, *alua_cg
, *lu_gp_cg
;
2959 struct config_item
*item
;
2962 subsys
= target_core_subsystem
[0];
2964 lu_gp_cg
= &alua_lu_gps_group
;
2965 for (i
= 0; lu_gp_cg
->default_groups
[i
]; i
++) {
2966 item
= &lu_gp_cg
->default_groups
[i
]->cg_item
;
2967 lu_gp_cg
->default_groups
[i
] = NULL
;
2968 config_item_put(item
);
2970 kfree(lu_gp_cg
->default_groups
);
2971 lu_gp_cg
->default_groups
= NULL
;
2973 alua_cg
= &alua_group
;
2974 for (i
= 0; alua_cg
->default_groups
[i
]; i
++) {
2975 item
= &alua_cg
->default_groups
[i
]->cg_item
;
2976 alua_cg
->default_groups
[i
] = NULL
;
2977 config_item_put(item
);
2979 kfree(alua_cg
->default_groups
);
2980 alua_cg
->default_groups
= NULL
;
2982 hba_cg
= &target_core_hbagroup
;
2983 for (i
= 0; hba_cg
->default_groups
[i
]; i
++) {
2984 item
= &hba_cg
->default_groups
[i
]->cg_item
;
2985 hba_cg
->default_groups
[i
] = NULL
;
2986 config_item_put(item
);
2988 kfree(hba_cg
->default_groups
);
2989 hba_cg
->default_groups
= NULL
;
2991 * We expect subsys->su_group.default_groups to be released
2992 * by configfs subsystem provider logic..
2994 configfs_unregister_subsystem(subsys
);
2995 kfree(subsys
->su_group
.default_groups
);
2997 core_alua_free_lu_gp(default_lu_gp
);
2998 default_lu_gp
= NULL
;
3000 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3001 " Infrastructure\n");
3003 core_dev_release_virtual_lun0();
3005 release_se_kmem_caches();
3008 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3009 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3010 MODULE_LICENSE("GPL");
3012 module_init(target_core_init_configfs
);
3013 module_exit(target_core_exit_configfs
);