1 /*******************************************************************************
2 * Filename: target_core_configfs.c
4 * This file contains ConfigFS logic for the Generic Target Engine project.
6 * (c) Copyright 2008-2013 Datera, Inc.
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"
51 #include "target_core_xcopy.h"
53 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
54 static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
56 struct target_backend_cits *tbc = &sa->tb_cits; \
57 struct config_item_type *cit = &tbc->tb_##_name##_cit; \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = _attrs; \
62 cit->ct_owner = sa->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
66 extern struct t10_alua_lu_gp
*default_lu_gp
;
68 static LIST_HEAD(g_tf_list
);
69 static DEFINE_MUTEX(g_tf_lock
);
71 struct target_core_configfs_attribute
{
72 struct configfs_attribute attr
;
73 ssize_t (*show
)(void *, char *);
74 ssize_t (*store
)(void *, const char *, size_t);
77 static struct config_group target_core_hbagroup
;
78 static struct config_group alua_group
;
79 static struct config_group alua_lu_gps_group
;
81 static inline struct se_hba
*
82 item_to_hba(struct config_item
*item
)
84 return container_of(to_config_group(item
), struct se_hba
, hba_group
);
88 * Attributes for /sys/kernel/config/target/
90 static ssize_t
target_core_attr_show(struct config_item
*item
,
91 struct configfs_attribute
*attr
,
94 return sprintf(page
, "Target Engine Core ConfigFS Infrastructure %s"
95 " on %s/%s on "UTS_RELEASE
"\n", TARGET_CORE_CONFIGFS_VERSION
,
96 utsname()->sysname
, utsname()->machine
);
99 static struct configfs_item_operations target_core_fabric_item_ops
= {
100 .show_attribute
= target_core_attr_show
,
103 static struct configfs_attribute target_core_item_attr_version
= {
104 .ca_owner
= THIS_MODULE
,
105 .ca_name
= "version",
109 static struct target_fabric_configfs
*target_core_get_fabric(
112 struct target_fabric_configfs
*tf
;
117 mutex_lock(&g_tf_lock
);
118 list_for_each_entry(tf
, &g_tf_list
, tf_list
) {
119 if (!strcmp(tf
->tf_name
, name
)) {
120 atomic_inc(&tf
->tf_access_cnt
);
121 mutex_unlock(&g_tf_lock
);
125 mutex_unlock(&g_tf_lock
);
131 * Called from struct target_core_group_ops->make_group()
133 static struct config_group
*target_core_register_fabric(
134 struct config_group
*group
,
137 struct target_fabric_configfs
*tf
;
140 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
141 " %s\n", group
, name
);
143 tf
= target_core_get_fabric(name
);
145 pr_debug("target_core_register_fabric() trying autoload for %s\n",
149 * Below are some hardcoded request_module() calls to automatically
150 * local fabric modules when the following is called:
152 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
154 * Note that this does not limit which TCM fabric module can be
155 * registered, but simply provids auto loading logic for modules with
156 * mkdir(2) system calls with known TCM fabric modules.
159 if (!strncmp(name
, "iscsi", 5)) {
161 * Automatically load the LIO Target fabric module when the
162 * following is called:
164 * mkdir -p $CONFIGFS/target/iscsi
166 ret
= request_module("iscsi_target_mod");
168 pr_debug("request_module() failed for"
169 " iscsi_target_mod.ko: %d\n", ret
);
170 return ERR_PTR(-EINVAL
);
172 } else if (!strncmp(name
, "loopback", 8)) {
174 * Automatically load the tcm_loop fabric module when the
175 * following is called:
177 * mkdir -p $CONFIGFS/target/loopback
179 ret
= request_module("tcm_loop");
181 pr_debug("request_module() failed for"
182 " tcm_loop.ko: %d\n", ret
);
183 return ERR_PTR(-EINVAL
);
187 tf
= target_core_get_fabric(name
);
191 pr_debug("target_core_get_fabric() failed for %s\n",
193 return ERR_PTR(-EINVAL
);
195 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
196 " %s\n", tf
->tf_name
);
198 * On a successful target_core_get_fabric() look, the returned
199 * struct target_fabric_configfs *tf will contain a usage reference.
201 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
202 &tf
->tf_cit_tmpl
.tfc_wwn_cit
);
204 tf
->tf_group
.default_groups
= tf
->tf_default_groups
;
205 tf
->tf_group
.default_groups
[0] = &tf
->tf_disc_group
;
206 tf
->tf_group
.default_groups
[1] = NULL
;
208 config_group_init_type_name(&tf
->tf_group
, name
,
209 &tf
->tf_cit_tmpl
.tfc_wwn_cit
);
210 config_group_init_type_name(&tf
->tf_disc_group
, "discovery_auth",
211 &tf
->tf_cit_tmpl
.tfc_discovery_cit
);
213 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
214 " %s\n", tf
->tf_group
.cg_item
.ci_name
);
216 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
218 tf
->tf_ops
.tf_subsys
= tf
->tf_subsys
;
219 tf
->tf_fabric
= &tf
->tf_group
.cg_item
;
220 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
223 return &tf
->tf_group
;
227 * Called from struct target_core_group_ops->drop_item()
229 static void target_core_deregister_fabric(
230 struct config_group
*group
,
231 struct config_item
*item
)
233 struct target_fabric_configfs
*tf
= container_of(
234 to_config_group(item
), struct target_fabric_configfs
, tf_group
);
235 struct config_group
*tf_group
;
236 struct config_item
*df_item
;
239 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
240 " tf list\n", config_item_name(item
));
242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
243 " %s\n", tf
->tf_name
);
244 atomic_dec(&tf
->tf_access_cnt
);
246 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
247 " tf->tf_fabric for %s\n", tf
->tf_name
);
248 tf
->tf_fabric
= NULL
;
250 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
251 " %s\n", config_item_name(item
));
253 tf_group
= &tf
->tf_group
;
254 for (i
= 0; tf_group
->default_groups
[i
]; i
++) {
255 df_item
= &tf_group
->default_groups
[i
]->cg_item
;
256 tf_group
->default_groups
[i
] = NULL
;
257 config_item_put(df_item
);
259 config_item_put(item
);
262 static struct configfs_group_operations target_core_fabric_group_ops
= {
263 .make_group
= &target_core_register_fabric
,
264 .drop_item
= &target_core_deregister_fabric
,
268 * All item attributes appearing in /sys/kernel/target/ appear here.
270 static struct configfs_attribute
*target_core_fabric_item_attrs
[] = {
271 &target_core_item_attr_version
,
276 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
278 static struct config_item_type target_core_fabrics_item
= {
279 .ct_item_ops
= &target_core_fabric_item_ops
,
280 .ct_group_ops
= &target_core_fabric_group_ops
,
281 .ct_attrs
= target_core_fabric_item_attrs
,
282 .ct_owner
= THIS_MODULE
,
285 static struct configfs_subsystem target_core_fabrics
= {
288 .ci_namebuf
= "target",
289 .ci_type
= &target_core_fabrics_item
,
294 struct configfs_subsystem
*target_core_subsystem
[] = {
295 &target_core_fabrics
,
299 /*##############################################################################
300 // Start functions called by external Target Fabrics Modules
301 //############################################################################*/
303 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops
*tfo
)
306 pr_err("Missing tfo->name\n");
309 if (strlen(tfo
->name
) >= TARGET_FABRIC_NAME_SIZE
) {
310 pr_err("Passed name: %s exceeds TARGET_FABRIC"
311 "_NAME_SIZE\n", tfo
->name
);
314 if (!tfo
->get_fabric_name
) {
315 pr_err("Missing tfo->get_fabric_name()\n");
318 if (!tfo
->get_fabric_proto_ident
) {
319 pr_err("Missing tfo->get_fabric_proto_ident()\n");
322 if (!tfo
->tpg_get_wwn
) {
323 pr_err("Missing tfo->tpg_get_wwn()\n");
326 if (!tfo
->tpg_get_tag
) {
327 pr_err("Missing tfo->tpg_get_tag()\n");
330 if (!tfo
->tpg_get_default_depth
) {
331 pr_err("Missing tfo->tpg_get_default_depth()\n");
334 if (!tfo
->tpg_get_pr_transport_id
) {
335 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
338 if (!tfo
->tpg_get_pr_transport_id_len
) {
339 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
342 if (!tfo
->tpg_check_demo_mode
) {
343 pr_err("Missing tfo->tpg_check_demo_mode()\n");
346 if (!tfo
->tpg_check_demo_mode_cache
) {
347 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
350 if (!tfo
->tpg_check_demo_mode_write_protect
) {
351 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
354 if (!tfo
->tpg_check_prod_mode_write_protect
) {
355 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
358 if (!tfo
->tpg_alloc_fabric_acl
) {
359 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
362 if (!tfo
->tpg_release_fabric_acl
) {
363 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
366 if (!tfo
->tpg_get_inst_index
) {
367 pr_err("Missing tfo->tpg_get_inst_index()\n");
370 if (!tfo
->release_cmd
) {
371 pr_err("Missing tfo->release_cmd()\n");
374 if (!tfo
->shutdown_session
) {
375 pr_err("Missing tfo->shutdown_session()\n");
378 if (!tfo
->close_session
) {
379 pr_err("Missing tfo->close_session()\n");
382 if (!tfo
->sess_get_index
) {
383 pr_err("Missing tfo->sess_get_index()\n");
386 if (!tfo
->write_pending
) {
387 pr_err("Missing tfo->write_pending()\n");
390 if (!tfo
->write_pending_status
) {
391 pr_err("Missing tfo->write_pending_status()\n");
394 if (!tfo
->set_default_node_attributes
) {
395 pr_err("Missing tfo->set_default_node_attributes()\n");
398 if (!tfo
->get_task_tag
) {
399 pr_err("Missing tfo->get_task_tag()\n");
402 if (!tfo
->get_cmd_state
) {
403 pr_err("Missing tfo->get_cmd_state()\n");
406 if (!tfo
->queue_data_in
) {
407 pr_err("Missing tfo->queue_data_in()\n");
410 if (!tfo
->queue_status
) {
411 pr_err("Missing tfo->queue_status()\n");
414 if (!tfo
->queue_tm_rsp
) {
415 pr_err("Missing tfo->queue_tm_rsp()\n");
418 if (!tfo
->aborted_task
) {
419 pr_err("Missing tfo->aborted_task()\n");
423 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
424 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
425 * target_core_fabric_configfs.c WWN+TPG group context code.
427 if (!tfo
->fabric_make_wwn
) {
428 pr_err("Missing tfo->fabric_make_wwn()\n");
431 if (!tfo
->fabric_drop_wwn
) {
432 pr_err("Missing tfo->fabric_drop_wwn()\n");
435 if (!tfo
->fabric_make_tpg
) {
436 pr_err("Missing tfo->fabric_make_tpg()\n");
439 if (!tfo
->fabric_drop_tpg
) {
440 pr_err("Missing tfo->fabric_drop_tpg()\n");
447 int target_register_template(const struct target_core_fabric_ops
*fo
)
449 struct target_fabric_configfs
*tf
;
452 ret
= target_fabric_tf_ops_check(fo
);
456 tf
= kzalloc(sizeof(struct target_fabric_configfs
), GFP_KERNEL
);
458 pr_err("%s: could not allocate memory!\n", __func__
);
462 INIT_LIST_HEAD(&tf
->tf_list
);
463 atomic_set(&tf
->tf_access_cnt
, 0);
466 * Setup the default generic struct config_item_type's (cits) in
467 * struct target_fabric_configfs->tf_cit_tmpl
469 tf
->tf_module
= fo
->module
;
470 tf
->tf_subsys
= target_core_subsystem
[0];
471 snprintf(tf
->tf_name
, TARGET_FABRIC_NAME_SIZE
, "%s", fo
->name
);
474 target_fabric_setup_cits(tf
);
476 mutex_lock(&g_tf_lock
);
477 list_add_tail(&tf
->tf_list
, &g_tf_list
);
478 mutex_unlock(&g_tf_lock
);
482 EXPORT_SYMBOL(target_register_template
);
484 void target_unregister_template(const struct target_core_fabric_ops
*fo
)
486 struct target_fabric_configfs
*t
;
488 mutex_lock(&g_tf_lock
);
489 list_for_each_entry(t
, &g_tf_list
, tf_list
) {
490 if (!strcmp(t
->tf_name
, fo
->name
)) {
491 BUG_ON(atomic_read(&t
->tf_access_cnt
));
492 list_del(&t
->tf_list
);
497 mutex_unlock(&g_tf_lock
);
499 EXPORT_SYMBOL(target_unregister_template
);
501 /*##############################################################################
502 // Stop functions called by external Target Fabrics Modules
503 //############################################################################*/
505 /* Start functions for struct config_item_type tb_dev_attrib_cit */
507 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib
, se_dev_attrib
);
508 CONFIGFS_EATTR_OPS(target_core_dev_attrib
, se_dev_attrib
, da_group
);
510 static struct configfs_item_operations target_core_dev_attrib_ops
= {
511 .show_attribute
= target_core_dev_attrib_attr_show
,
512 .store_attribute
= target_core_dev_attrib_attr_store
,
515 TB_CIT_SETUP(dev_attrib
, &target_core_dev_attrib_ops
, NULL
, NULL
);
517 /* End functions for struct config_item_type tb_dev_attrib_cit */
519 /* Start functions for struct config_item_type tb_dev_wwn_cit */
521 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn
, t10_wwn
);
522 #define SE_DEV_WWN_ATTR(_name, _mode) \
523 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
524 __CONFIGFS_EATTR(_name, _mode, \
525 target_core_dev_wwn_show_attr_##_name, \
526 target_core_dev_wwn_store_attr_##_name);
528 #define SE_DEV_WWN_ATTR_RO(_name); \
530 static struct target_core_dev_wwn_attribute \
531 target_core_dev_wwn_##_name = \
532 __CONFIGFS_EATTR_RO(_name, \
533 target_core_dev_wwn_show_attr_##_name); \
537 * VPD page 0x80 Unit serial
539 static ssize_t
target_core_dev_wwn_show_attr_vpd_unit_serial(
540 struct t10_wwn
*t10_wwn
,
543 return sprintf(page
, "T10 VPD Unit Serial Number: %s\n",
544 &t10_wwn
->unit_serial
[0]);
547 static ssize_t
target_core_dev_wwn_store_attr_vpd_unit_serial(
548 struct t10_wwn
*t10_wwn
,
552 struct se_device
*dev
= t10_wwn
->t10_dev
;
553 unsigned char buf
[INQUIRY_VPD_SERIAL_LEN
];
556 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
557 * from the struct scsi_device level firmware, do not allow
558 * VPD Unit Serial to be emulated.
560 * Note this struct scsi_device could also be emulating VPD
561 * information from its drivers/scsi LLD. But for now we assume
562 * it is doing 'the right thing' wrt a world wide unique
563 * VPD Unit Serial Number that OS dependent multipath can depend on.
565 if (dev
->dev_flags
& DF_FIRMWARE_VPD_UNIT_SERIAL
) {
566 pr_err("Underlying SCSI device firmware provided VPD"
567 " Unit Serial, ignoring request\n");
571 if (strlen(page
) >= INQUIRY_VPD_SERIAL_LEN
) {
572 pr_err("Emulated VPD Unit Serial exceeds"
573 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN
);
577 * Check to see if any active $FABRIC_MOD exports exist. If they
578 * do exist, fail here as changing this information on the fly
579 * (underneath the initiator side OS dependent multipath code)
580 * could cause negative effects.
582 if (dev
->export_count
) {
583 pr_err("Unable to set VPD Unit Serial while"
584 " active %d $FABRIC_MOD exports exist\n",
590 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
592 * Also, strip any newline added from the userspace
593 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
595 memset(buf
, 0, INQUIRY_VPD_SERIAL_LEN
);
596 snprintf(buf
, INQUIRY_VPD_SERIAL_LEN
, "%s", page
);
597 snprintf(dev
->t10_wwn
.unit_serial
, INQUIRY_VPD_SERIAL_LEN
,
598 "%s", strstrip(buf
));
599 dev
->dev_flags
|= DF_EMULATED_VPD_UNIT_SERIAL
;
601 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
602 " %s\n", dev
->t10_wwn
.unit_serial
);
607 SE_DEV_WWN_ATTR(vpd_unit_serial
, S_IRUGO
| S_IWUSR
);
610 * VPD page 0x83 Protocol Identifier
612 static ssize_t
target_core_dev_wwn_show_attr_vpd_protocol_identifier(
613 struct t10_wwn
*t10_wwn
,
617 unsigned char buf
[VPD_TMP_BUF_SIZE
];
620 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
622 spin_lock(&t10_wwn
->t10_vpd_lock
);
623 list_for_each_entry(vpd
, &t10_wwn
->t10_vpd_list
, vpd_list
) {
624 if (!vpd
->protocol_identifier_set
)
627 transport_dump_vpd_proto_id(vpd
, buf
, VPD_TMP_BUF_SIZE
);
629 if (len
+ strlen(buf
) >= PAGE_SIZE
)
632 len
+= sprintf(page
+len
, "%s", buf
);
634 spin_unlock(&t10_wwn
->t10_vpd_lock
);
639 static ssize_t
target_core_dev_wwn_store_attr_vpd_protocol_identifier(
640 struct t10_wwn
*t10_wwn
,
647 SE_DEV_WWN_ATTR(vpd_protocol_identifier
, S_IRUGO
| S_IWUSR
);
650 * Generic wrapper for dumping VPD identifiers by association.
652 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
653 static ssize_t target_core_dev_wwn_show_attr_##_name( \
654 struct t10_wwn *t10_wwn, \
657 struct t10_vpd *vpd; \
658 unsigned char buf[VPD_TMP_BUF_SIZE]; \
661 spin_lock(&t10_wwn->t10_vpd_lock); \
662 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
663 if (vpd->association != _assoc) \
666 memset(buf, 0, VPD_TMP_BUF_SIZE); \
667 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
668 if (len + strlen(buf) >= PAGE_SIZE) \
670 len += sprintf(page+len, "%s", buf); \
672 memset(buf, 0, VPD_TMP_BUF_SIZE); \
673 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
674 if (len + strlen(buf) >= PAGE_SIZE) \
676 len += sprintf(page+len, "%s", buf); \
678 memset(buf, 0, VPD_TMP_BUF_SIZE); \
679 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
680 if (len + strlen(buf) >= PAGE_SIZE) \
682 len += sprintf(page+len, "%s", buf); \
684 spin_unlock(&t10_wwn->t10_vpd_lock); \
690 * VPD page 0x83 Association: Logical Unit
692 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit
, 0x00);
694 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
695 struct t10_wwn
*t10_wwn
,
702 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit
, S_IRUGO
| S_IWUSR
);
705 * VPD page 0x83 Association: Target Port
707 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port
, 0x10);
709 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_target_port(
710 struct t10_wwn
*t10_wwn
,
717 SE_DEV_WWN_ATTR(vpd_assoc_target_port
, S_IRUGO
| S_IWUSR
);
720 * VPD page 0x83 Association: SCSI Target Device
722 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device
, 0x20);
724 static ssize_t
target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
725 struct t10_wwn
*t10_wwn
,
732 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device
, S_IRUGO
| S_IWUSR
);
734 CONFIGFS_EATTR_OPS(target_core_dev_wwn
, t10_wwn
, t10_wwn_group
);
736 static struct configfs_attribute
*target_core_dev_wwn_attrs
[] = {
737 &target_core_dev_wwn_vpd_unit_serial
.attr
,
738 &target_core_dev_wwn_vpd_protocol_identifier
.attr
,
739 &target_core_dev_wwn_vpd_assoc_logical_unit
.attr
,
740 &target_core_dev_wwn_vpd_assoc_target_port
.attr
,
741 &target_core_dev_wwn_vpd_assoc_scsi_target_device
.attr
,
745 static struct configfs_item_operations target_core_dev_wwn_ops
= {
746 .show_attribute
= target_core_dev_wwn_attr_show
,
747 .store_attribute
= target_core_dev_wwn_attr_store
,
750 TB_CIT_SETUP(dev_wwn
, &target_core_dev_wwn_ops
, NULL
, target_core_dev_wwn_attrs
);
752 /* End functions for struct config_item_type tb_dev_wwn_cit */
754 /* Start functions for struct config_item_type tb_dev_pr_cit */
756 CONFIGFS_EATTR_STRUCT(target_core_dev_pr
, se_device
);
757 #define SE_DEV_PR_ATTR(_name, _mode) \
758 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
759 __CONFIGFS_EATTR(_name, _mode, \
760 target_core_dev_pr_show_attr_##_name, \
761 target_core_dev_pr_store_attr_##_name);
763 #define SE_DEV_PR_ATTR_RO(_name); \
764 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
765 __CONFIGFS_EATTR_RO(_name, \
766 target_core_dev_pr_show_attr_##_name);
768 static ssize_t
target_core_dev_pr_show_spc3_res(struct se_device
*dev
,
771 struct se_node_acl
*se_nacl
;
772 struct t10_pr_registration
*pr_reg
;
773 char i_buf
[PR_REG_ISID_ID_LEN
];
775 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
777 pr_reg
= dev
->dev_pr_res_holder
;
779 return sprintf(page
, "No SPC-3 Reservation holder\n");
781 se_nacl
= pr_reg
->pr_reg_nacl
;
782 core_pr_dump_initiator_port(pr_reg
, i_buf
, PR_REG_ISID_ID_LEN
);
784 return sprintf(page
, "SPC-3 Reservation: %s Initiator: %s%s\n",
785 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
786 se_nacl
->initiatorname
, i_buf
);
789 static ssize_t
target_core_dev_pr_show_spc2_res(struct se_device
*dev
,
792 struct se_node_acl
*se_nacl
;
795 se_nacl
= dev
->dev_reserved_node_acl
;
798 "SPC-2 Reservation: %s Initiator: %s\n",
799 se_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
800 se_nacl
->initiatorname
);
802 len
= sprintf(page
, "No SPC-2 Reservation holder\n");
807 static ssize_t
target_core_dev_pr_show_attr_res_holder(struct se_device
*dev
,
812 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
813 return sprintf(page
, "Passthrough\n");
815 spin_lock(&dev
->dev_reservation_lock
);
816 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
817 ret
= target_core_dev_pr_show_spc2_res(dev
, page
);
819 ret
= target_core_dev_pr_show_spc3_res(dev
, page
);
820 spin_unlock(&dev
->dev_reservation_lock
);
824 SE_DEV_PR_ATTR_RO(res_holder
);
826 static ssize_t
target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
827 struct se_device
*dev
, char *page
)
831 spin_lock(&dev
->dev_reservation_lock
);
832 if (!dev
->dev_pr_res_holder
) {
833 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
834 } else if (dev
->dev_pr_res_holder
->pr_reg_all_tg_pt
) {
835 len
= sprintf(page
, "SPC-3 Reservation: All Target"
836 " Ports registration\n");
838 len
= sprintf(page
, "SPC-3 Reservation: Single"
839 " Target Port registration\n");
842 spin_unlock(&dev
->dev_reservation_lock
);
846 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts
);
848 static ssize_t
target_core_dev_pr_show_attr_res_pr_generation(
849 struct se_device
*dev
, char *page
)
851 return sprintf(page
, "0x%08x\n", dev
->t10_pr
.pr_generation
);
854 SE_DEV_PR_ATTR_RO(res_pr_generation
);
857 * res_pr_holder_tg_port
859 static ssize_t
target_core_dev_pr_show_attr_res_pr_holder_tg_port(
860 struct se_device
*dev
, char *page
)
862 struct se_node_acl
*se_nacl
;
864 struct se_portal_group
*se_tpg
;
865 struct t10_pr_registration
*pr_reg
;
866 const struct target_core_fabric_ops
*tfo
;
869 spin_lock(&dev
->dev_reservation_lock
);
870 pr_reg
= dev
->dev_pr_res_holder
;
872 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
876 se_nacl
= pr_reg
->pr_reg_nacl
;
877 se_tpg
= se_nacl
->se_tpg
;
878 lun
= pr_reg
->pr_reg_tg_pt_lun
;
879 tfo
= se_tpg
->se_tpg_tfo
;
881 len
+= sprintf(page
+len
, "SPC-3 Reservation: %s"
882 " Target Node Endpoint: %s\n", tfo
->get_fabric_name(),
883 tfo
->tpg_get_wwn(se_tpg
));
884 len
+= sprintf(page
+len
, "SPC-3 Reservation: Relative Port"
885 " Identifier Tag: %hu %s Portal Group Tag: %hu"
886 " %s Logical Unit: %u\n", lun
->lun_sep
->sep_rtpi
,
887 tfo
->get_fabric_name(), tfo
->tpg_get_tag(se_tpg
),
888 tfo
->get_fabric_name(), lun
->unpacked_lun
);
891 spin_unlock(&dev
->dev_reservation_lock
);
895 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port
);
897 static ssize_t
target_core_dev_pr_show_attr_res_pr_registered_i_pts(
898 struct se_device
*dev
, char *page
)
900 const struct target_core_fabric_ops
*tfo
;
901 struct t10_pr_registration
*pr_reg
;
902 unsigned char buf
[384];
903 char i_buf
[PR_REG_ISID_ID_LEN
];
907 len
+= sprintf(page
+len
, "SPC-3 PR Registrations:\n");
909 spin_lock(&dev
->t10_pr
.registration_lock
);
910 list_for_each_entry(pr_reg
, &dev
->t10_pr
.registration_list
,
914 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
915 tfo
= pr_reg
->pr_reg_nacl
->se_tpg
->se_tpg_tfo
;
916 core_pr_dump_initiator_port(pr_reg
, i_buf
,
918 sprintf(buf
, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
919 tfo
->get_fabric_name(),
920 pr_reg
->pr_reg_nacl
->initiatorname
, i_buf
, pr_reg
->pr_res_key
,
921 pr_reg
->pr_res_generation
);
923 if (len
+ strlen(buf
) >= PAGE_SIZE
)
926 len
+= sprintf(page
+len
, "%s", buf
);
929 spin_unlock(&dev
->t10_pr
.registration_lock
);
932 len
+= sprintf(page
+len
, "None\n");
937 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts
);
939 static ssize_t
target_core_dev_pr_show_attr_res_pr_type(
940 struct se_device
*dev
, char *page
)
942 struct t10_pr_registration
*pr_reg
;
945 spin_lock(&dev
->dev_reservation_lock
);
946 pr_reg
= dev
->dev_pr_res_holder
;
948 len
= sprintf(page
, "SPC-3 Reservation Type: %s\n",
949 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
));
951 len
= sprintf(page
, "No SPC-3 Reservation holder\n");
954 spin_unlock(&dev
->dev_reservation_lock
);
958 SE_DEV_PR_ATTR_RO(res_pr_type
);
960 static ssize_t
target_core_dev_pr_show_attr_res_type(
961 struct se_device
*dev
, char *page
)
963 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
964 return sprintf(page
, "SPC_PASSTHROUGH\n");
965 else if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
966 return sprintf(page
, "SPC2_RESERVATIONS\n");
968 return sprintf(page
, "SPC3_PERSISTENT_RESERVATIONS\n");
971 SE_DEV_PR_ATTR_RO(res_type
);
973 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_active(
974 struct se_device
*dev
, char *page
)
976 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
979 return sprintf(page
, "APTPL Bit Status: %s\n",
980 (dev
->t10_pr
.pr_aptpl_active
) ? "Activated" : "Disabled");
983 SE_DEV_PR_ATTR_RO(res_aptpl_active
);
988 static ssize_t
target_core_dev_pr_show_attr_res_aptpl_metadata(
989 struct se_device
*dev
, char *page
)
991 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
994 return sprintf(page
, "Ready to process PR APTPL metadata..\n");
998 Opt_initiator_fabric
, Opt_initiator_node
, Opt_initiator_sid
,
999 Opt_sa_res_key
, Opt_res_holder
, Opt_res_type
, Opt_res_scope
,
1000 Opt_res_all_tg_pt
, Opt_mapped_lun
, Opt_target_fabric
,
1001 Opt_target_node
, Opt_tpgt
, Opt_port_rtpi
, Opt_target_lun
, Opt_err
1004 static match_table_t tokens
= {
1005 {Opt_initiator_fabric
, "initiator_fabric=%s"},
1006 {Opt_initiator_node
, "initiator_node=%s"},
1007 {Opt_initiator_sid
, "initiator_sid=%s"},
1008 {Opt_sa_res_key
, "sa_res_key=%s"},
1009 {Opt_res_holder
, "res_holder=%d"},
1010 {Opt_res_type
, "res_type=%d"},
1011 {Opt_res_scope
, "res_scope=%d"},
1012 {Opt_res_all_tg_pt
, "res_all_tg_pt=%d"},
1013 {Opt_mapped_lun
, "mapped_lun=%d"},
1014 {Opt_target_fabric
, "target_fabric=%s"},
1015 {Opt_target_node
, "target_node=%s"},
1016 {Opt_tpgt
, "tpgt=%d"},
1017 {Opt_port_rtpi
, "port_rtpi=%d"},
1018 {Opt_target_lun
, "target_lun=%d"},
1022 static ssize_t
target_core_dev_pr_store_attr_res_aptpl_metadata(
1023 struct se_device
*dev
,
1027 unsigned char *i_fabric
= NULL
, *i_port
= NULL
, *isid
= NULL
;
1028 unsigned char *t_fabric
= NULL
, *t_port
= NULL
;
1029 char *orig
, *ptr
, *opts
;
1030 substring_t args
[MAX_OPT_ARGS
];
1031 unsigned long long tmp_ll
;
1033 u32 mapped_lun
= 0, target_lun
= 0;
1034 int ret
= -1, res_holder
= 0, all_tg_pt
= 0, arg
, token
;
1035 u16 port_rpti
= 0, tpgt
= 0;
1038 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1040 if (dev
->dev_reservation_flags
& DRF_SPC2_RESERVATIONS
)
1043 if (dev
->export_count
) {
1044 pr_debug("Unable to process APTPL metadata while"
1045 " active fabric exports exist\n");
1049 opts
= kstrdup(page
, GFP_KERNEL
);
1054 while ((ptr
= strsep(&opts
, ",\n")) != NULL
) {
1058 token
= match_token(ptr
, tokens
, args
);
1060 case Opt_initiator_fabric
:
1061 i_fabric
= match_strdup(args
);
1067 case Opt_initiator_node
:
1068 i_port
= match_strdup(args
);
1073 if (strlen(i_port
) >= PR_APTPL_MAX_IPORT_LEN
) {
1074 pr_err("APTPL metadata initiator_node="
1075 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1076 PR_APTPL_MAX_IPORT_LEN
);
1081 case Opt_initiator_sid
:
1082 isid
= match_strdup(args
);
1087 if (strlen(isid
) >= PR_REG_ISID_LEN
) {
1088 pr_err("APTPL metadata initiator_isid"
1089 "= exceeds PR_REG_ISID_LEN: %d\n",
1095 case Opt_sa_res_key
:
1096 ret
= kstrtoull(args
->from
, 0, &tmp_ll
);
1098 pr_err("kstrtoull() failed for sa_res_key=\n");
1101 sa_res_key
= (u64
)tmp_ll
;
1104 * PR APTPL Metadata for Reservation
1106 case Opt_res_holder
:
1107 match_int(args
, &arg
);
1111 match_int(args
, &arg
);
1115 match_int(args
, &arg
);
1118 case Opt_res_all_tg_pt
:
1119 match_int(args
, &arg
);
1120 all_tg_pt
= (int)arg
;
1122 case Opt_mapped_lun
:
1123 match_int(args
, &arg
);
1124 mapped_lun
= (u32
)arg
;
1127 * PR APTPL Metadata for Target Port
1129 case Opt_target_fabric
:
1130 t_fabric
= match_strdup(args
);
1136 case Opt_target_node
:
1137 t_port
= match_strdup(args
);
1142 if (strlen(t_port
) >= PR_APTPL_MAX_TPORT_LEN
) {
1143 pr_err("APTPL metadata target_node="
1144 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1145 PR_APTPL_MAX_TPORT_LEN
);
1151 match_int(args
, &arg
);
1155 match_int(args
, &arg
);
1156 port_rpti
= (u16
)arg
;
1158 case Opt_target_lun
:
1159 match_int(args
, &arg
);
1160 target_lun
= (u32
)arg
;
1167 if (!i_port
|| !t_port
|| !sa_res_key
) {
1168 pr_err("Illegal parameters for APTPL registration\n");
1173 if (res_holder
&& !(type
)) {
1174 pr_err("Illegal PR type: 0x%02x for reservation"
1180 ret
= core_scsi3_alloc_aptpl_registration(&dev
->t10_pr
, sa_res_key
,
1181 i_port
, isid
, mapped_lun
, t_port
, tpgt
, target_lun
,
1182 res_holder
, all_tg_pt
, type
);
1190 return (ret
== 0) ? count
: ret
;
1193 SE_DEV_PR_ATTR(res_aptpl_metadata
, S_IRUGO
| S_IWUSR
);
1195 CONFIGFS_EATTR_OPS(target_core_dev_pr
, se_device
, dev_pr_group
);
1197 static struct configfs_attribute
*target_core_dev_pr_attrs
[] = {
1198 &target_core_dev_pr_res_holder
.attr
,
1199 &target_core_dev_pr_res_pr_all_tgt_pts
.attr
,
1200 &target_core_dev_pr_res_pr_generation
.attr
,
1201 &target_core_dev_pr_res_pr_holder_tg_port
.attr
,
1202 &target_core_dev_pr_res_pr_registered_i_pts
.attr
,
1203 &target_core_dev_pr_res_pr_type
.attr
,
1204 &target_core_dev_pr_res_type
.attr
,
1205 &target_core_dev_pr_res_aptpl_active
.attr
,
1206 &target_core_dev_pr_res_aptpl_metadata
.attr
,
1210 static struct configfs_item_operations target_core_dev_pr_ops
= {
1211 .show_attribute
= target_core_dev_pr_attr_show
,
1212 .store_attribute
= target_core_dev_pr_attr_store
,
1215 TB_CIT_SETUP(dev_pr
, &target_core_dev_pr_ops
, NULL
, target_core_dev_pr_attrs
);
1217 /* End functions for struct config_item_type tb_dev_pr_cit */
1219 /* Start functions for struct config_item_type tb_dev_cit */
1221 static ssize_t
target_core_show_dev_info(void *p
, char *page
)
1223 struct se_device
*dev
= p
;
1224 struct se_subsystem_api
*t
= dev
->transport
;
1226 ssize_t read_bytes
= 0;
1228 transport_dump_dev_state(dev
, page
, &bl
);
1230 read_bytes
+= t
->show_configfs_dev_params(dev
, page
+read_bytes
);
1234 static struct target_core_configfs_attribute target_core_attr_dev_info
= {
1235 .attr
= { .ca_owner
= THIS_MODULE
,
1237 .ca_mode
= S_IRUGO
},
1238 .show
= target_core_show_dev_info
,
1242 static ssize_t
target_core_store_dev_control(
1247 struct se_device
*dev
= p
;
1248 struct se_subsystem_api
*t
= dev
->transport
;
1250 return t
->set_configfs_dev_params(dev
, page
, count
);
1253 static struct target_core_configfs_attribute target_core_attr_dev_control
= {
1254 .attr
= { .ca_owner
= THIS_MODULE
,
1255 .ca_name
= "control",
1256 .ca_mode
= S_IWUSR
},
1258 .store
= target_core_store_dev_control
,
1261 static ssize_t
target_core_show_dev_alias(void *p
, char *page
)
1263 struct se_device
*dev
= p
;
1265 if (!(dev
->dev_flags
& DF_USING_ALIAS
))
1268 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->dev_alias
);
1271 static ssize_t
target_core_store_dev_alias(
1276 struct se_device
*dev
= p
;
1277 struct se_hba
*hba
= dev
->se_hba
;
1280 if (count
> (SE_DEV_ALIAS_LEN
-1)) {
1281 pr_err("alias count: %d exceeds"
1282 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count
,
1283 SE_DEV_ALIAS_LEN
-1);
1287 read_bytes
= snprintf(&dev
->dev_alias
[0], SE_DEV_ALIAS_LEN
, "%s", page
);
1290 if (dev
->dev_alias
[read_bytes
- 1] == '\n')
1291 dev
->dev_alias
[read_bytes
- 1] = '\0';
1293 dev
->dev_flags
|= DF_USING_ALIAS
;
1295 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1296 config_item_name(&hba
->hba_group
.cg_item
),
1297 config_item_name(&dev
->dev_group
.cg_item
),
1303 static struct target_core_configfs_attribute target_core_attr_dev_alias
= {
1304 .attr
= { .ca_owner
= THIS_MODULE
,
1306 .ca_mode
= S_IRUGO
| S_IWUSR
},
1307 .show
= target_core_show_dev_alias
,
1308 .store
= target_core_store_dev_alias
,
1311 static ssize_t
target_core_show_dev_udev_path(void *p
, char *page
)
1313 struct se_device
*dev
= p
;
1315 if (!(dev
->dev_flags
& DF_USING_UDEV_PATH
))
1318 return snprintf(page
, PAGE_SIZE
, "%s\n", dev
->udev_path
);
1321 static ssize_t
target_core_store_dev_udev_path(
1326 struct se_device
*dev
= p
;
1327 struct se_hba
*hba
= dev
->se_hba
;
1330 if (count
> (SE_UDEV_PATH_LEN
-1)) {
1331 pr_err("udev_path count: %d exceeds"
1332 " SE_UDEV_PATH_LEN-1: %u\n", (int)count
,
1333 SE_UDEV_PATH_LEN
-1);
1337 read_bytes
= snprintf(&dev
->udev_path
[0], SE_UDEV_PATH_LEN
,
1341 if (dev
->udev_path
[read_bytes
- 1] == '\n')
1342 dev
->udev_path
[read_bytes
- 1] = '\0';
1344 dev
->dev_flags
|= DF_USING_UDEV_PATH
;
1346 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1347 config_item_name(&hba
->hba_group
.cg_item
),
1348 config_item_name(&dev
->dev_group
.cg_item
),
1354 static struct target_core_configfs_attribute target_core_attr_dev_udev_path
= {
1355 .attr
= { .ca_owner
= THIS_MODULE
,
1356 .ca_name
= "udev_path",
1357 .ca_mode
= S_IRUGO
| S_IWUSR
},
1358 .show
= target_core_show_dev_udev_path
,
1359 .store
= target_core_store_dev_udev_path
,
1362 static ssize_t
target_core_show_dev_enable(void *p
, char *page
)
1364 struct se_device
*dev
= p
;
1366 return snprintf(page
, PAGE_SIZE
, "%d\n", !!(dev
->dev_flags
& DF_CONFIGURED
));
1369 static ssize_t
target_core_store_dev_enable(
1374 struct se_device
*dev
= p
;
1378 ptr
= strstr(page
, "1");
1380 pr_err("For dev_enable ops, only valid value"
1385 ret
= target_configure_device(dev
);
1391 static struct target_core_configfs_attribute target_core_attr_dev_enable
= {
1392 .attr
= { .ca_owner
= THIS_MODULE
,
1393 .ca_name
= "enable",
1394 .ca_mode
= S_IRUGO
| S_IWUSR
},
1395 .show
= target_core_show_dev_enable
,
1396 .store
= target_core_store_dev_enable
,
1399 static ssize_t
target_core_show_alua_lu_gp(void *p
, char *page
)
1401 struct se_device
*dev
= p
;
1402 struct config_item
*lu_ci
;
1403 struct t10_alua_lu_gp
*lu_gp
;
1404 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1407 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1411 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1412 lu_gp
= lu_gp_mem
->lu_gp
;
1414 lu_ci
= &lu_gp
->lu_gp_group
.cg_item
;
1415 len
+= sprintf(page
, "LU Group Alias: %s\nLU Group ID: %hu\n",
1416 config_item_name(lu_ci
), lu_gp
->lu_gp_id
);
1418 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1423 static ssize_t
target_core_store_alua_lu_gp(
1428 struct se_device
*dev
= p
;
1429 struct se_hba
*hba
= dev
->se_hba
;
1430 struct t10_alua_lu_gp
*lu_gp
= NULL
, *lu_gp_new
= NULL
;
1431 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1432 unsigned char buf
[LU_GROUP_NAME_BUF
];
1435 lu_gp_mem
= dev
->dev_alua_lu_gp_mem
;
1439 if (count
> LU_GROUP_NAME_BUF
) {
1440 pr_err("ALUA LU Group Alias too large!\n");
1443 memset(buf
, 0, LU_GROUP_NAME_BUF
);
1444 memcpy(buf
, page
, count
);
1446 * Any ALUA logical unit alias besides "NULL" means we will be
1447 * making a new group association.
1449 if (strcmp(strstrip(buf
), "NULL")) {
1451 * core_alua_get_lu_gp_by_name() will increment reference to
1452 * struct t10_alua_lu_gp. This reference is released with
1453 * core_alua_get_lu_gp_by_name below().
1455 lu_gp_new
= core_alua_get_lu_gp_by_name(strstrip(buf
));
1460 spin_lock(&lu_gp_mem
->lu_gp_mem_lock
);
1461 lu_gp
= lu_gp_mem
->lu_gp
;
1464 * Clearing an existing lu_gp association, and replacing
1468 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1469 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1471 config_item_name(&hba
->hba_group
.cg_item
),
1472 config_item_name(&dev
->dev_group
.cg_item
),
1473 config_item_name(&lu_gp
->lu_gp_group
.cg_item
),
1476 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1477 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1482 * Removing existing association of lu_gp_mem with lu_gp
1484 __core_alua_drop_lu_gp_mem(lu_gp_mem
, lu_gp
);
1488 * Associate lu_gp_mem with lu_gp_new.
1490 __core_alua_attach_lu_gp_mem(lu_gp_mem
, lu_gp_new
);
1491 spin_unlock(&lu_gp_mem
->lu_gp_mem_lock
);
1493 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1494 " core/alua/lu_gps/%s, ID: %hu\n",
1495 (move
) ? "Moving" : "Adding",
1496 config_item_name(&hba
->hba_group
.cg_item
),
1497 config_item_name(&dev
->dev_group
.cg_item
),
1498 config_item_name(&lu_gp_new
->lu_gp_group
.cg_item
),
1499 lu_gp_new
->lu_gp_id
);
1501 core_alua_put_lu_gp_from_name(lu_gp_new
);
1505 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp
= {
1506 .attr
= { .ca_owner
= THIS_MODULE
,
1507 .ca_name
= "alua_lu_gp",
1508 .ca_mode
= S_IRUGO
| S_IWUSR
},
1509 .show
= target_core_show_alua_lu_gp
,
1510 .store
= target_core_store_alua_lu_gp
,
1513 static ssize_t
target_core_show_dev_lba_map(void *p
, char *page
)
1515 struct se_device
*dev
= p
;
1516 struct t10_alua_lba_map
*map
;
1517 struct t10_alua_lba_map_member
*mem
;
1522 spin_lock(&dev
->t10_alua
.lba_map_lock
);
1523 if (!list_empty(&dev
->t10_alua
.lba_map_list
))
1524 bl
+= sprintf(b
+ bl
, "%u %u\n",
1525 dev
->t10_alua
.lba_map_segment_size
,
1526 dev
->t10_alua
.lba_map_segment_multiplier
);
1527 list_for_each_entry(map
, &dev
->t10_alua
.lba_map_list
, lba_map_list
) {
1528 bl
+= sprintf(b
+ bl
, "%llu %llu",
1529 map
->lba_map_first_lba
, map
->lba_map_last_lba
);
1530 list_for_each_entry(mem
, &map
->lba_map_mem_list
,
1532 switch (mem
->lba_map_mem_alua_state
) {
1533 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
:
1536 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
:
1539 case ALUA_ACCESS_STATE_STANDBY
:
1542 case ALUA_ACCESS_STATE_UNAVAILABLE
:
1549 bl
+= sprintf(b
+ bl
, " %d:%c",
1550 mem
->lba_map_mem_alua_pg_id
, state
);
1552 bl
+= sprintf(b
+ bl
, "\n");
1554 spin_unlock(&dev
->t10_alua
.lba_map_lock
);
1558 static ssize_t
target_core_store_dev_lba_map(
1563 struct se_device
*dev
= p
;
1564 struct t10_alua_lba_map
*lba_map
= NULL
;
1565 struct list_head lba_list
;
1566 char *map_entries
, *ptr
;
1568 int pg_num
= -1, pg
;
1569 int ret
= 0, num
= 0, pg_id
, alua_state
;
1570 unsigned long start_lba
= -1, end_lba
= -1;
1571 unsigned long segment_size
= -1, segment_mult
= -1;
1573 map_entries
= kstrdup(page
, GFP_KERNEL
);
1577 INIT_LIST_HEAD(&lba_list
);
1578 while ((ptr
= strsep(&map_entries
, "\n")) != NULL
) {
1583 if (sscanf(ptr
, "%lu %lu\n",
1584 &segment_size
, &segment_mult
) != 2) {
1585 pr_err("Invalid line %d\n", num
);
1592 if (sscanf(ptr
, "%lu %lu", &start_lba
, &end_lba
) != 2) {
1593 pr_err("Invalid line %d\n", num
);
1597 ptr
= strchr(ptr
, ' ');
1599 pr_err("Invalid line %d, missing end lba\n", num
);
1604 ptr
= strchr(ptr
, ' ');
1606 pr_err("Invalid line %d, missing state definitions\n",
1612 lba_map
= core_alua_allocate_lba_map(&lba_list
,
1613 start_lba
, end_lba
);
1614 if (IS_ERR(lba_map
)) {
1615 ret
= PTR_ERR(lba_map
);
1619 while (sscanf(ptr
, "%d:%c", &pg_id
, &state
) == 2) {
1622 alua_state
= ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED
;
1625 alua_state
= ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED
;
1628 alua_state
= ALUA_ACCESS_STATE_STANDBY
;
1631 alua_state
= ALUA_ACCESS_STATE_UNAVAILABLE
;
1634 pr_err("Invalid ALUA state '%c'\n", state
);
1639 ret
= core_alua_allocate_lba_map_mem(lba_map
,
1642 pr_err("Invalid target descriptor %d:%c "
1648 ptr
= strchr(ptr
, ' ');
1656 else if (pg
!= pg_num
) {
1657 pr_err("Only %d from %d port groups definitions "
1658 "at line %d\n", pg
, pg_num
, num
);
1666 core_alua_free_lba_map(&lba_list
);
1669 core_alua_set_lba_map(dev
, &lba_list
,
1670 segment_size
, segment_mult
);
1675 static struct target_core_configfs_attribute target_core_attr_dev_lba_map
= {
1676 .attr
= { .ca_owner
= THIS_MODULE
,
1677 .ca_name
= "lba_map",
1678 .ca_mode
= S_IRUGO
| S_IWUSR
},
1679 .show
= target_core_show_dev_lba_map
,
1680 .store
= target_core_store_dev_lba_map
,
1683 static struct configfs_attribute
*target_core_dev_attrs
[] = {
1684 &target_core_attr_dev_info
.attr
,
1685 &target_core_attr_dev_control
.attr
,
1686 &target_core_attr_dev_alias
.attr
,
1687 &target_core_attr_dev_udev_path
.attr
,
1688 &target_core_attr_dev_enable
.attr
,
1689 &target_core_attr_dev_alua_lu_gp
.attr
,
1690 &target_core_attr_dev_lba_map
.attr
,
1694 static void target_core_dev_release(struct config_item
*item
)
1696 struct config_group
*dev_cg
= to_config_group(item
);
1697 struct se_device
*dev
=
1698 container_of(dev_cg
, struct se_device
, dev_group
);
1700 kfree(dev_cg
->default_groups
);
1701 target_free_device(dev
);
1704 static ssize_t
target_core_dev_show(struct config_item
*item
,
1705 struct configfs_attribute
*attr
,
1708 struct config_group
*dev_cg
= to_config_group(item
);
1709 struct se_device
*dev
=
1710 container_of(dev_cg
, struct se_device
, dev_group
);
1711 struct target_core_configfs_attribute
*tc_attr
= container_of(
1712 attr
, struct target_core_configfs_attribute
, attr
);
1717 return tc_attr
->show(dev
, page
);
1720 static ssize_t
target_core_dev_store(struct config_item
*item
,
1721 struct configfs_attribute
*attr
,
1722 const char *page
, size_t count
)
1724 struct config_group
*dev_cg
= to_config_group(item
);
1725 struct se_device
*dev
=
1726 container_of(dev_cg
, struct se_device
, dev_group
);
1727 struct target_core_configfs_attribute
*tc_attr
= container_of(
1728 attr
, struct target_core_configfs_attribute
, attr
);
1730 if (!tc_attr
->store
)
1733 return tc_attr
->store(dev
, page
, count
);
1736 static struct configfs_item_operations target_core_dev_item_ops
= {
1737 .release
= target_core_dev_release
,
1738 .show_attribute
= target_core_dev_show
,
1739 .store_attribute
= target_core_dev_store
,
1742 TB_CIT_SETUP(dev
, &target_core_dev_item_ops
, NULL
, target_core_dev_attrs
);
1744 /* End functions for struct config_item_type tb_dev_cit */
1746 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1748 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp
, t10_alua_lu_gp
);
1749 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1750 static struct target_core_alua_lu_gp_attribute \
1751 target_core_alua_lu_gp_##_name = \
1752 __CONFIGFS_EATTR(_name, _mode, \
1753 target_core_alua_lu_gp_show_attr_##_name, \
1754 target_core_alua_lu_gp_store_attr_##_name);
1756 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1757 static struct target_core_alua_lu_gp_attribute \
1758 target_core_alua_lu_gp_##_name = \
1759 __CONFIGFS_EATTR_RO(_name, \
1760 target_core_alua_lu_gp_show_attr_##_name);
1765 static ssize_t
target_core_alua_lu_gp_show_attr_lu_gp_id(
1766 struct t10_alua_lu_gp
*lu_gp
,
1769 if (!lu_gp
->lu_gp_valid_id
)
1772 return sprintf(page
, "%hu\n", lu_gp
->lu_gp_id
);
1775 static ssize_t
target_core_alua_lu_gp_store_attr_lu_gp_id(
1776 struct t10_alua_lu_gp
*lu_gp
,
1780 struct config_group
*alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
1781 unsigned long lu_gp_id
;
1784 ret
= kstrtoul(page
, 0, &lu_gp_id
);
1786 pr_err("kstrtoul() returned %d for"
1787 " lu_gp_id\n", ret
);
1790 if (lu_gp_id
> 0x0000ffff) {
1791 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1792 " 0x0000ffff\n", lu_gp_id
);
1796 ret
= core_alua_set_lu_gp_id(lu_gp
, (u16
)lu_gp_id
);
1800 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1801 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1802 config_item_name(&alua_lu_gp_cg
->cg_item
),
1808 SE_DEV_ALUA_LU_ATTR(lu_gp_id
, S_IRUGO
| S_IWUSR
);
1813 static ssize_t
target_core_alua_lu_gp_show_attr_members(
1814 struct t10_alua_lu_gp
*lu_gp
,
1817 struct se_device
*dev
;
1819 struct t10_alua_lu_gp_member
*lu_gp_mem
;
1820 ssize_t len
= 0, cur_len
;
1821 unsigned char buf
[LU_GROUP_NAME_BUF
];
1823 memset(buf
, 0, LU_GROUP_NAME_BUF
);
1825 spin_lock(&lu_gp
->lu_gp_lock
);
1826 list_for_each_entry(lu_gp_mem
, &lu_gp
->lu_gp_mem_list
, lu_gp_mem_list
) {
1827 dev
= lu_gp_mem
->lu_gp_mem_dev
;
1830 cur_len
= snprintf(buf
, LU_GROUP_NAME_BUF
, "%s/%s\n",
1831 config_item_name(&hba
->hba_group
.cg_item
),
1832 config_item_name(&dev
->dev_group
.cg_item
));
1833 cur_len
++; /* Extra byte for NULL terminator */
1835 if ((cur_len
+ len
) > PAGE_SIZE
) {
1836 pr_warn("Ran out of lu_gp_show_attr"
1837 "_members buffer\n");
1840 memcpy(page
+len
, buf
, cur_len
);
1843 spin_unlock(&lu_gp
->lu_gp_lock
);
1848 SE_DEV_ALUA_LU_ATTR_RO(members
);
1850 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp
, t10_alua_lu_gp
, lu_gp_group
);
1852 static struct configfs_attribute
*target_core_alua_lu_gp_attrs
[] = {
1853 &target_core_alua_lu_gp_lu_gp_id
.attr
,
1854 &target_core_alua_lu_gp_members
.attr
,
1858 static void target_core_alua_lu_gp_release(struct config_item
*item
)
1860 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
1861 struct t10_alua_lu_gp
, lu_gp_group
);
1863 core_alua_free_lu_gp(lu_gp
);
1866 static struct configfs_item_operations target_core_alua_lu_gp_ops
= {
1867 .release
= target_core_alua_lu_gp_release
,
1868 .show_attribute
= target_core_alua_lu_gp_attr_show
,
1869 .store_attribute
= target_core_alua_lu_gp_attr_store
,
1872 static struct config_item_type target_core_alua_lu_gp_cit
= {
1873 .ct_item_ops
= &target_core_alua_lu_gp_ops
,
1874 .ct_attrs
= target_core_alua_lu_gp_attrs
,
1875 .ct_owner
= THIS_MODULE
,
1878 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1880 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1882 static struct config_group
*target_core_alua_create_lu_gp(
1883 struct config_group
*group
,
1886 struct t10_alua_lu_gp
*lu_gp
;
1887 struct config_group
*alua_lu_gp_cg
= NULL
;
1888 struct config_item
*alua_lu_gp_ci
= NULL
;
1890 lu_gp
= core_alua_allocate_lu_gp(name
, 0);
1894 alua_lu_gp_cg
= &lu_gp
->lu_gp_group
;
1895 alua_lu_gp_ci
= &alua_lu_gp_cg
->cg_item
;
1897 config_group_init_type_name(alua_lu_gp_cg
, name
,
1898 &target_core_alua_lu_gp_cit
);
1900 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1901 " Group: core/alua/lu_gps/%s\n",
1902 config_item_name(alua_lu_gp_ci
));
1904 return alua_lu_gp_cg
;
1908 static void target_core_alua_drop_lu_gp(
1909 struct config_group
*group
,
1910 struct config_item
*item
)
1912 struct t10_alua_lu_gp
*lu_gp
= container_of(to_config_group(item
),
1913 struct t10_alua_lu_gp
, lu_gp_group
);
1915 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1916 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1917 config_item_name(item
), lu_gp
->lu_gp_id
);
1919 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1920 * -> target_core_alua_lu_gp_release()
1922 config_item_put(item
);
1925 static struct configfs_group_operations target_core_alua_lu_gps_group_ops
= {
1926 .make_group
= &target_core_alua_create_lu_gp
,
1927 .drop_item
= &target_core_alua_drop_lu_gp
,
1930 static struct config_item_type target_core_alua_lu_gps_cit
= {
1931 .ct_item_ops
= NULL
,
1932 .ct_group_ops
= &target_core_alua_lu_gps_group_ops
,
1933 .ct_owner
= THIS_MODULE
,
1936 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1938 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1940 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
);
1941 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
1942 static struct target_core_alua_tg_pt_gp_attribute \
1943 target_core_alua_tg_pt_gp_##_name = \
1944 __CONFIGFS_EATTR(_name, _mode, \
1945 target_core_alua_tg_pt_gp_show_attr_##_name, \
1946 target_core_alua_tg_pt_gp_store_attr_##_name);
1948 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
1949 static struct target_core_alua_tg_pt_gp_attribute \
1950 target_core_alua_tg_pt_gp_##_name = \
1951 __CONFIGFS_EATTR_RO(_name, \
1952 target_core_alua_tg_pt_gp_show_attr_##_name);
1957 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_state(
1958 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
1961 return sprintf(page
, "%d\n",
1962 atomic_read(&tg_pt_gp
->tg_pt_gp_alua_access_state
));
1965 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_state(
1966 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
1970 struct se_device
*dev
= tg_pt_gp
->tg_pt_gp_dev
;
1974 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
1975 pr_err("Unable to do implicit ALUA on non valid"
1976 " tg_pt_gp ID: %hu\n", tg_pt_gp
->tg_pt_gp_valid_id
);
1979 if (!(dev
->dev_flags
& DF_CONFIGURED
)) {
1980 pr_err("Unable to set alua_access_state while device is"
1981 " not configured\n");
1985 ret
= kstrtoul(page
, 0, &tmp
);
1987 pr_err("Unable to extract new ALUA access state from"
1991 new_state
= (int)tmp
;
1993 if (!(tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_IMPLICIT_ALUA
)) {
1994 pr_err("Unable to process implicit configfs ALUA"
1995 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
1998 if (tg_pt_gp
->tg_pt_gp_alua_access_type
& TPGS_EXPLICIT_ALUA
&&
1999 new_state
== ALUA_ACCESS_STATE_LBA_DEPENDENT
) {
2000 /* LBA DEPENDENT is only allowed with implicit ALUA */
2001 pr_err("Unable to process implicit configfs ALUA transition"
2002 " while explicit ALUA management is enabled\n");
2006 ret
= core_alua_do_port_transition(tg_pt_gp
, dev
,
2007 NULL
, NULL
, new_state
, 0);
2008 return (!ret
) ? count
: -EINVAL
;
2011 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state
, S_IRUGO
| S_IWUSR
);
2014 * alua_access_status
2016 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2017 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2020 return sprintf(page
, "%s\n",
2021 core_alua_dump_status(tg_pt_gp
->tg_pt_gp_alua_access_status
));
2024 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2025 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2030 int new_status
, ret
;
2032 if (!tg_pt_gp
->tg_pt_gp_valid_id
) {
2033 pr_err("Unable to do set ALUA access status on non"
2034 " valid tg_pt_gp ID: %hu\n",
2035 tg_pt_gp
->tg_pt_gp_valid_id
);
2039 ret
= kstrtoul(page
, 0, &tmp
);
2041 pr_err("Unable to extract new ALUA access status"
2042 " from %s\n", page
);
2045 new_status
= (int)tmp
;
2047 if ((new_status
!= ALUA_STATUS_NONE
) &&
2048 (new_status
!= ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG
) &&
2049 (new_status
!= ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA
)) {
2050 pr_err("Illegal ALUA access status: 0x%02x\n",
2055 tg_pt_gp
->tg_pt_gp_alua_access_status
= new_status
;
2059 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status
, S_IRUGO
| S_IWUSR
);
2064 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2065 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2068 return core_alua_show_access_type(tg_pt_gp
, page
);
2071 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2072 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2076 return core_alua_store_access_type(tg_pt_gp
, page
, count
);
2079 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type
, S_IRUGO
| S_IWUSR
);
2082 * alua_supported_states
2085 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2086 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2087 struct t10_alua_tg_pt_gp *t, char *p) \
2089 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2092 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2093 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2094 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2096 unsigned long tmp; \
2099 if (!t->tg_pt_gp_valid_id) { \
2100 pr_err("Unable to do set ##_name ALUA state on non" \
2101 " valid tg_pt_gp ID: %hu\n", \
2102 t->tg_pt_gp_valid_id); \
2106 ret = kstrtoul(p, 0, &tmp); \
2108 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2112 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2123 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning
,
2124 tg_pt_gp_alua_supported_states
, ALUA_T_SUP
);
2125 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning
,
2126 tg_pt_gp_alua_supported_states
, ALUA_T_SUP
);
2127 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning
, S_IRUGO
| S_IWUSR
);
2129 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline
,
2130 tg_pt_gp_alua_supported_states
, ALUA_O_SUP
);
2131 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline
,
2132 tg_pt_gp_alua_supported_states
, ALUA_O_SUP
);
2133 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline
, S_IRUGO
| S_IWUSR
);
2135 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent
,
2136 tg_pt_gp_alua_supported_states
, ALUA_LBD_SUP
);
2137 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent
,
2138 tg_pt_gp_alua_supported_states
, ALUA_LBD_SUP
);
2139 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent
, S_IRUGO
);
2141 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable
,
2142 tg_pt_gp_alua_supported_states
, ALUA_U_SUP
);
2143 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable
,
2144 tg_pt_gp_alua_supported_states
, ALUA_U_SUP
);
2145 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable
, S_IRUGO
| S_IWUSR
);
2147 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby
,
2148 tg_pt_gp_alua_supported_states
, ALUA_S_SUP
);
2149 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby
,
2150 tg_pt_gp_alua_supported_states
, ALUA_S_SUP
);
2151 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby
, S_IRUGO
| S_IWUSR
);
2153 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized
,
2154 tg_pt_gp_alua_supported_states
, ALUA_AO_SUP
);
2155 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized
,
2156 tg_pt_gp_alua_supported_states
, ALUA_AO_SUP
);
2157 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized
, S_IRUGO
| S_IWUSR
);
2159 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized
,
2160 tg_pt_gp_alua_supported_states
, ALUA_AN_SUP
);
2161 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized
,
2162 tg_pt_gp_alua_supported_states
, ALUA_AN_SUP
);
2163 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized
, S_IRUGO
| S_IWUSR
);
2166 * alua_write_metadata
2168 static ssize_t
target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2169 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2172 return sprintf(page
, "%d\n", tg_pt_gp
->tg_pt_gp_write_metadata
);
2175 static ssize_t
target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2176 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2183 ret
= kstrtoul(page
, 0, &tmp
);
2185 pr_err("Unable to extract alua_write_metadata\n");
2189 if ((tmp
!= 0) && (tmp
!= 1)) {
2190 pr_err("Illegal value for alua_write_metadata:"
2194 tg_pt_gp
->tg_pt_gp_write_metadata
= (int)tmp
;
2199 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata
, S_IRUGO
| S_IWUSR
);
2206 static ssize_t
target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2207 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2210 return core_alua_show_nonop_delay_msecs(tg_pt_gp
, page
);
2214 static ssize_t
target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2215 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2219 return core_alua_store_nonop_delay_msecs(tg_pt_gp
, page
, count
);
2222 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs
, S_IRUGO
| S_IWUSR
);
2227 static ssize_t
target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2228 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2231 return core_alua_show_trans_delay_msecs(tg_pt_gp
, page
);
2234 static ssize_t
target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2235 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2239 return core_alua_store_trans_delay_msecs(tg_pt_gp
, page
, count
);
2242 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs
, S_IRUGO
| S_IWUSR
);
2245 * implicit_trans_secs
2247 static ssize_t
target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2248 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2251 return core_alua_show_implicit_trans_secs(tg_pt_gp
, page
);
2254 static ssize_t
target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2255 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2259 return core_alua_store_implicit_trans_secs(tg_pt_gp
, page
, count
);
2262 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs
, S_IRUGO
| S_IWUSR
);
2268 static ssize_t
target_core_alua_tg_pt_gp_show_attr_preferred(
2269 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2272 return core_alua_show_preferred_bit(tg_pt_gp
, page
);
2275 static ssize_t
target_core_alua_tg_pt_gp_store_attr_preferred(
2276 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2280 return core_alua_store_preferred_bit(tg_pt_gp
, page
, count
);
2283 SE_DEV_ALUA_TG_PT_ATTR(preferred
, S_IRUGO
| S_IWUSR
);
2288 static ssize_t
target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2289 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2292 if (!tg_pt_gp
->tg_pt_gp_valid_id
)
2295 return sprintf(page
, "%hu\n", tg_pt_gp
->tg_pt_gp_id
);
2298 static ssize_t
target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2299 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2303 struct config_group
*alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2304 unsigned long tg_pt_gp_id
;
2307 ret
= kstrtoul(page
, 0, &tg_pt_gp_id
);
2309 pr_err("kstrtoul() returned %d for"
2310 " tg_pt_gp_id\n", ret
);
2313 if (tg_pt_gp_id
> 0x0000ffff) {
2314 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2315 " 0x0000ffff\n", tg_pt_gp_id
);
2319 ret
= core_alua_set_tg_pt_gp_id(tg_pt_gp
, (u16
)tg_pt_gp_id
);
2323 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2324 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2325 config_item_name(&alua_tg_pt_gp_cg
->cg_item
),
2326 tg_pt_gp
->tg_pt_gp_id
);
2331 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id
, S_IRUGO
| S_IWUSR
);
2336 static ssize_t
target_core_alua_tg_pt_gp_show_attr_members(
2337 struct t10_alua_tg_pt_gp
*tg_pt_gp
,
2340 struct se_port
*port
;
2341 struct se_portal_group
*tpg
;
2343 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
;
2344 ssize_t len
= 0, cur_len
;
2345 unsigned char buf
[TG_PT_GROUP_NAME_BUF
];
2347 memset(buf
, 0, TG_PT_GROUP_NAME_BUF
);
2349 spin_lock(&tg_pt_gp
->tg_pt_gp_lock
);
2350 list_for_each_entry(tg_pt_gp_mem
, &tg_pt_gp
->tg_pt_gp_mem_list
,
2351 tg_pt_gp_mem_list
) {
2352 port
= tg_pt_gp_mem
->tg_pt
;
2353 tpg
= port
->sep_tpg
;
2354 lun
= port
->sep_lun
;
2356 cur_len
= snprintf(buf
, TG_PT_GROUP_NAME_BUF
, "%s/%s/tpgt_%hu"
2357 "/%s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
2358 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
),
2359 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
2360 config_item_name(&lun
->lun_group
.cg_item
));
2361 cur_len
++; /* Extra byte for NULL terminator */
2363 if ((cur_len
+ len
) > PAGE_SIZE
) {
2364 pr_warn("Ran out of lu_gp_show_attr"
2365 "_members buffer\n");
2368 memcpy(page
+len
, buf
, cur_len
);
2371 spin_unlock(&tg_pt_gp
->tg_pt_gp_lock
);
2376 SE_DEV_ALUA_TG_PT_ATTR_RO(members
);
2378 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp
, t10_alua_tg_pt_gp
,
2381 static struct configfs_attribute
*target_core_alua_tg_pt_gp_attrs
[] = {
2382 &target_core_alua_tg_pt_gp_alua_access_state
.attr
,
2383 &target_core_alua_tg_pt_gp_alua_access_status
.attr
,
2384 &target_core_alua_tg_pt_gp_alua_access_type
.attr
,
2385 &target_core_alua_tg_pt_gp_alua_support_transitioning
.attr
,
2386 &target_core_alua_tg_pt_gp_alua_support_offline
.attr
,
2387 &target_core_alua_tg_pt_gp_alua_support_lba_dependent
.attr
,
2388 &target_core_alua_tg_pt_gp_alua_support_unavailable
.attr
,
2389 &target_core_alua_tg_pt_gp_alua_support_standby
.attr
,
2390 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized
.attr
,
2391 &target_core_alua_tg_pt_gp_alua_support_active_optimized
.attr
,
2392 &target_core_alua_tg_pt_gp_alua_write_metadata
.attr
,
2393 &target_core_alua_tg_pt_gp_nonop_delay_msecs
.attr
,
2394 &target_core_alua_tg_pt_gp_trans_delay_msecs
.attr
,
2395 &target_core_alua_tg_pt_gp_implicit_trans_secs
.attr
,
2396 &target_core_alua_tg_pt_gp_preferred
.attr
,
2397 &target_core_alua_tg_pt_gp_tg_pt_gp_id
.attr
,
2398 &target_core_alua_tg_pt_gp_members
.attr
,
2402 static void target_core_alua_tg_pt_gp_release(struct config_item
*item
)
2404 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2405 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2407 core_alua_free_tg_pt_gp(tg_pt_gp
);
2410 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops
= {
2411 .release
= target_core_alua_tg_pt_gp_release
,
2412 .show_attribute
= target_core_alua_tg_pt_gp_attr_show
,
2413 .store_attribute
= target_core_alua_tg_pt_gp_attr_store
,
2416 static struct config_item_type target_core_alua_tg_pt_gp_cit
= {
2417 .ct_item_ops
= &target_core_alua_tg_pt_gp_ops
,
2418 .ct_attrs
= target_core_alua_tg_pt_gp_attrs
,
2419 .ct_owner
= THIS_MODULE
,
2422 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2424 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2426 static struct config_group
*target_core_alua_create_tg_pt_gp(
2427 struct config_group
*group
,
2430 struct t10_alua
*alua
= container_of(group
, struct t10_alua
,
2431 alua_tg_pt_gps_group
);
2432 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2433 struct config_group
*alua_tg_pt_gp_cg
= NULL
;
2434 struct config_item
*alua_tg_pt_gp_ci
= NULL
;
2436 tg_pt_gp
= core_alua_allocate_tg_pt_gp(alua
->t10_dev
, name
, 0);
2440 alua_tg_pt_gp_cg
= &tg_pt_gp
->tg_pt_gp_group
;
2441 alua_tg_pt_gp_ci
= &alua_tg_pt_gp_cg
->cg_item
;
2443 config_group_init_type_name(alua_tg_pt_gp_cg
, name
,
2444 &target_core_alua_tg_pt_gp_cit
);
2446 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2447 " Group: alua/tg_pt_gps/%s\n",
2448 config_item_name(alua_tg_pt_gp_ci
));
2450 return alua_tg_pt_gp_cg
;
2453 static void target_core_alua_drop_tg_pt_gp(
2454 struct config_group
*group
,
2455 struct config_item
*item
)
2457 struct t10_alua_tg_pt_gp
*tg_pt_gp
= container_of(to_config_group(item
),
2458 struct t10_alua_tg_pt_gp
, tg_pt_gp_group
);
2460 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2461 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2462 config_item_name(item
), tg_pt_gp
->tg_pt_gp_id
);
2464 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2465 * -> target_core_alua_tg_pt_gp_release().
2467 config_item_put(item
);
2470 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops
= {
2471 .make_group
= &target_core_alua_create_tg_pt_gp
,
2472 .drop_item
= &target_core_alua_drop_tg_pt_gp
,
2475 TB_CIT_SETUP(dev_alua_tg_pt_gps
, NULL
, &target_core_alua_tg_pt_gps_group_ops
, NULL
);
2477 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2479 /* Start functions for struct config_item_type target_core_alua_cit */
2482 * target_core_alua_cit is a ConfigFS group that lives under
2483 * /sys/kernel/config/target/core/alua. There are default groups
2484 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2485 * target_core_alua_cit in target_core_init_configfs() below.
2487 static struct config_item_type target_core_alua_cit
= {
2488 .ct_item_ops
= NULL
,
2490 .ct_owner
= THIS_MODULE
,
2493 /* End functions for struct config_item_type target_core_alua_cit */
2495 /* Start functions for struct config_item_type tb_dev_stat_cit */
2497 static struct config_group
*target_core_stat_mkdir(
2498 struct config_group
*group
,
2501 return ERR_PTR(-ENOSYS
);
2504 static void target_core_stat_rmdir(
2505 struct config_group
*group
,
2506 struct config_item
*item
)
2511 static struct configfs_group_operations target_core_stat_group_ops
= {
2512 .make_group
= &target_core_stat_mkdir
,
2513 .drop_item
= &target_core_stat_rmdir
,
2516 TB_CIT_SETUP(dev_stat
, NULL
, &target_core_stat_group_ops
, NULL
);
2518 /* End functions for struct config_item_type tb_dev_stat_cit */
2520 /* Start functions for struct config_item_type target_core_hba_cit */
2522 static struct config_group
*target_core_make_subdev(
2523 struct config_group
*group
,
2526 struct t10_alua_tg_pt_gp
*tg_pt_gp
;
2527 struct se_subsystem_api
*t
;
2528 struct config_item
*hba_ci
= &group
->cg_item
;
2529 struct se_hba
*hba
= item_to_hba(hba_ci
);
2530 struct se_device
*dev
;
2531 struct config_group
*dev_cg
= NULL
, *tg_pt_gp_cg
= NULL
;
2532 struct config_group
*dev_stat_grp
= NULL
;
2533 int errno
= -ENOMEM
, ret
;
2535 ret
= mutex_lock_interruptible(&hba
->hba_access_mutex
);
2537 return ERR_PTR(ret
);
2539 * Locate the struct se_subsystem_api from parent's struct se_hba.
2543 dev
= target_alloc_device(hba
, name
);
2547 dev_cg
= &dev
->dev_group
;
2549 dev_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 6,
2551 if (!dev_cg
->default_groups
)
2552 goto out_free_device
;
2554 config_group_init_type_name(dev_cg
, name
, &t
->tb_cits
.tb_dev_cit
);
2555 config_group_init_type_name(&dev
->dev_attrib
.da_group
, "attrib",
2556 &t
->tb_cits
.tb_dev_attrib_cit
);
2557 config_group_init_type_name(&dev
->dev_pr_group
, "pr",
2558 &t
->tb_cits
.tb_dev_pr_cit
);
2559 config_group_init_type_name(&dev
->t10_wwn
.t10_wwn_group
, "wwn",
2560 &t
->tb_cits
.tb_dev_wwn_cit
);
2561 config_group_init_type_name(&dev
->t10_alua
.alua_tg_pt_gps_group
,
2562 "alua", &t
->tb_cits
.tb_dev_alua_tg_pt_gps_cit
);
2563 config_group_init_type_name(&dev
->dev_stat_grps
.stat_group
,
2564 "statistics", &t
->tb_cits
.tb_dev_stat_cit
);
2566 dev_cg
->default_groups
[0] = &dev
->dev_attrib
.da_group
;
2567 dev_cg
->default_groups
[1] = &dev
->dev_pr_group
;
2568 dev_cg
->default_groups
[2] = &dev
->t10_wwn
.t10_wwn_group
;
2569 dev_cg
->default_groups
[3] = &dev
->t10_alua
.alua_tg_pt_gps_group
;
2570 dev_cg
->default_groups
[4] = &dev
->dev_stat_grps
.stat_group
;
2571 dev_cg
->default_groups
[5] = NULL
;
2573 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2575 tg_pt_gp
= core_alua_allocate_tg_pt_gp(dev
, "default_tg_pt_gp", 1);
2577 goto out_free_dev_cg_default_groups
;
2578 dev
->t10_alua
.default_tg_pt_gp
= tg_pt_gp
;
2580 tg_pt_gp_cg
= &dev
->t10_alua
.alua_tg_pt_gps_group
;
2581 tg_pt_gp_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2583 if (!tg_pt_gp_cg
->default_groups
) {
2584 pr_err("Unable to allocate tg_pt_gp_cg->"
2585 "default_groups\n");
2586 goto out_free_tg_pt_gp
;
2589 config_group_init_type_name(&tg_pt_gp
->tg_pt_gp_group
,
2590 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit
);
2591 tg_pt_gp_cg
->default_groups
[0] = &tg_pt_gp
->tg_pt_gp_group
;
2592 tg_pt_gp_cg
->default_groups
[1] = NULL
;
2594 * Add core/$HBA/$DEV/statistics/ default groups
2596 dev_stat_grp
= &dev
->dev_stat_grps
.stat_group
;
2597 dev_stat_grp
->default_groups
= kmalloc(sizeof(struct config_group
*) * 4,
2599 if (!dev_stat_grp
->default_groups
) {
2600 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2601 goto out_free_tg_pt_gp_cg_default_groups
;
2603 target_stat_setup_dev_default_groups(dev
);
2605 mutex_unlock(&hba
->hba_access_mutex
);
2608 out_free_tg_pt_gp_cg_default_groups
:
2609 kfree(tg_pt_gp_cg
->default_groups
);
2611 core_alua_free_tg_pt_gp(tg_pt_gp
);
2612 out_free_dev_cg_default_groups
:
2613 kfree(dev_cg
->default_groups
);
2615 target_free_device(dev
);
2617 mutex_unlock(&hba
->hba_access_mutex
);
2618 return ERR_PTR(errno
);
2621 static void target_core_drop_subdev(
2622 struct config_group
*group
,
2623 struct config_item
*item
)
2625 struct config_group
*dev_cg
= to_config_group(item
);
2626 struct se_device
*dev
=
2627 container_of(dev_cg
, struct se_device
, dev_group
);
2629 struct config_item
*df_item
;
2630 struct config_group
*tg_pt_gp_cg
, *dev_stat_grp
;
2633 hba
= item_to_hba(&dev
->se_hba
->hba_group
.cg_item
);
2635 mutex_lock(&hba
->hba_access_mutex
);
2637 dev_stat_grp
= &dev
->dev_stat_grps
.stat_group
;
2638 for (i
= 0; dev_stat_grp
->default_groups
[i
]; i
++) {
2639 df_item
= &dev_stat_grp
->default_groups
[i
]->cg_item
;
2640 dev_stat_grp
->default_groups
[i
] = NULL
;
2641 config_item_put(df_item
);
2643 kfree(dev_stat_grp
->default_groups
);
2645 tg_pt_gp_cg
= &dev
->t10_alua
.alua_tg_pt_gps_group
;
2646 for (i
= 0; tg_pt_gp_cg
->default_groups
[i
]; i
++) {
2647 df_item
= &tg_pt_gp_cg
->default_groups
[i
]->cg_item
;
2648 tg_pt_gp_cg
->default_groups
[i
] = NULL
;
2649 config_item_put(df_item
);
2651 kfree(tg_pt_gp_cg
->default_groups
);
2653 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2654 * directly from target_core_alua_tg_pt_gp_release().
2656 dev
->t10_alua
.default_tg_pt_gp
= NULL
;
2658 for (i
= 0; dev_cg
->default_groups
[i
]; i
++) {
2659 df_item
= &dev_cg
->default_groups
[i
]->cg_item
;
2660 dev_cg
->default_groups
[i
] = NULL
;
2661 config_item_put(df_item
);
2664 * se_dev is released from target_core_dev_item_ops->release()
2666 config_item_put(item
);
2667 mutex_unlock(&hba
->hba_access_mutex
);
2670 static struct configfs_group_operations target_core_hba_group_ops
= {
2671 .make_group
= target_core_make_subdev
,
2672 .drop_item
= target_core_drop_subdev
,
2675 CONFIGFS_EATTR_STRUCT(target_core_hba
, se_hba
);
2676 #define SE_HBA_ATTR(_name, _mode) \
2677 static struct target_core_hba_attribute \
2678 target_core_hba_##_name = \
2679 __CONFIGFS_EATTR(_name, _mode, \
2680 target_core_hba_show_attr_##_name, \
2681 target_core_hba_store_attr_##_name);
2683 #define SE_HBA_ATTR_RO(_name) \
2684 static struct target_core_hba_attribute \
2685 target_core_hba_##_name = \
2686 __CONFIGFS_EATTR_RO(_name, \
2687 target_core_hba_show_attr_##_name);
2689 static ssize_t
target_core_hba_show_attr_hba_info(
2693 return sprintf(page
, "HBA Index: %d plugin: %s version: %s\n",
2694 hba
->hba_id
, hba
->transport
->name
,
2695 TARGET_CORE_CONFIGFS_VERSION
);
2698 SE_HBA_ATTR_RO(hba_info
);
2700 static ssize_t
target_core_hba_show_attr_hba_mode(struct se_hba
*hba
,
2705 if (hba
->hba_flags
& HBA_FLAGS_PSCSI_MODE
)
2708 return sprintf(page
, "%d\n", hba_mode
);
2711 static ssize_t
target_core_hba_store_attr_hba_mode(struct se_hba
*hba
,
2712 const char *page
, size_t count
)
2714 struct se_subsystem_api
*transport
= hba
->transport
;
2715 unsigned long mode_flag
;
2718 if (transport
->pmode_enable_hba
== NULL
)
2721 ret
= kstrtoul(page
, 0, &mode_flag
);
2723 pr_err("Unable to extract hba mode flag: %d\n", ret
);
2727 if (hba
->dev_count
) {
2728 pr_err("Unable to set hba_mode with active devices\n");
2732 ret
= transport
->pmode_enable_hba(hba
, mode_flag
);
2736 hba
->hba_flags
|= HBA_FLAGS_PSCSI_MODE
;
2738 hba
->hba_flags
&= ~HBA_FLAGS_PSCSI_MODE
;
2743 SE_HBA_ATTR(hba_mode
, S_IRUGO
| S_IWUSR
);
2745 CONFIGFS_EATTR_OPS(target_core_hba
, se_hba
, hba_group
);
2747 static void target_core_hba_release(struct config_item
*item
)
2749 struct se_hba
*hba
= container_of(to_config_group(item
),
2750 struct se_hba
, hba_group
);
2751 core_delete_hba(hba
);
2754 static struct configfs_attribute
*target_core_hba_attrs
[] = {
2755 &target_core_hba_hba_info
.attr
,
2756 &target_core_hba_hba_mode
.attr
,
2760 static struct configfs_item_operations target_core_hba_item_ops
= {
2761 .release
= target_core_hba_release
,
2762 .show_attribute
= target_core_hba_attr_show
,
2763 .store_attribute
= target_core_hba_attr_store
,
2766 static struct config_item_type target_core_hba_cit
= {
2767 .ct_item_ops
= &target_core_hba_item_ops
,
2768 .ct_group_ops
= &target_core_hba_group_ops
,
2769 .ct_attrs
= target_core_hba_attrs
,
2770 .ct_owner
= THIS_MODULE
,
2773 static struct config_group
*target_core_call_addhbatotarget(
2774 struct config_group
*group
,
2777 char *se_plugin_str
, *str
, *str2
;
2779 char buf
[TARGET_CORE_NAME_MAX_LEN
];
2780 unsigned long plugin_dep_id
= 0;
2783 memset(buf
, 0, TARGET_CORE_NAME_MAX_LEN
);
2784 if (strlen(name
) >= TARGET_CORE_NAME_MAX_LEN
) {
2785 pr_err("Passed *name strlen(): %d exceeds"
2786 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name
),
2787 TARGET_CORE_NAME_MAX_LEN
);
2788 return ERR_PTR(-ENAMETOOLONG
);
2790 snprintf(buf
, TARGET_CORE_NAME_MAX_LEN
, "%s", name
);
2792 str
= strstr(buf
, "_");
2794 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2795 return ERR_PTR(-EINVAL
);
2797 se_plugin_str
= buf
;
2799 * Special case for subsystem plugins that have "_" in their names.
2800 * Namely rd_direct and rd_mcp..
2802 str2
= strstr(str
+1, "_");
2804 *str2
= '\0'; /* Terminate for *se_plugin_str */
2805 str2
++; /* Skip to start of plugin dependent ID */
2808 *str
= '\0'; /* Terminate for *se_plugin_str */
2809 str
++; /* Skip to start of plugin dependent ID */
2812 ret
= kstrtoul(str
, 0, &plugin_dep_id
);
2814 pr_err("kstrtoul() returned %d for"
2815 " plugin_dep_id\n", ret
);
2816 return ERR_PTR(ret
);
2819 * Load up TCM subsystem plugins if they have not already been loaded.
2821 transport_subsystem_check_init();
2823 hba
= core_alloc_hba(se_plugin_str
, plugin_dep_id
, 0);
2825 return ERR_CAST(hba
);
2827 config_group_init_type_name(&hba
->hba_group
, name
,
2828 &target_core_hba_cit
);
2830 return &hba
->hba_group
;
2833 static void target_core_call_delhbafromtarget(
2834 struct config_group
*group
,
2835 struct config_item
*item
)
2838 * core_delete_hba() is called from target_core_hba_item_ops->release()
2839 * -> target_core_hba_release()
2841 config_item_put(item
);
2844 static struct configfs_group_operations target_core_group_ops
= {
2845 .make_group
= target_core_call_addhbatotarget
,
2846 .drop_item
= target_core_call_delhbafromtarget
,
2849 static struct config_item_type target_core_cit
= {
2850 .ct_item_ops
= NULL
,
2851 .ct_group_ops
= &target_core_group_ops
,
2853 .ct_owner
= THIS_MODULE
,
2856 /* Stop functions for struct config_item_type target_core_hba_cit */
2858 void target_core_setup_sub_cits(struct se_subsystem_api
*sa
)
2860 target_core_setup_dev_cit(sa
);
2861 target_core_setup_dev_attrib_cit(sa
);
2862 target_core_setup_dev_pr_cit(sa
);
2863 target_core_setup_dev_wwn_cit(sa
);
2864 target_core_setup_dev_alua_tg_pt_gps_cit(sa
);
2865 target_core_setup_dev_stat_cit(sa
);
2867 EXPORT_SYMBOL(target_core_setup_sub_cits
);
2869 static int __init
target_core_init_configfs(void)
2871 struct config_group
*target_cg
, *hba_cg
= NULL
, *alua_cg
= NULL
;
2872 struct config_group
*lu_gp_cg
= NULL
;
2873 struct configfs_subsystem
*subsys
;
2874 struct t10_alua_lu_gp
*lu_gp
;
2877 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2878 " Engine: %s on %s/%s on "UTS_RELEASE
"\n",
2879 TARGET_CORE_VERSION
, utsname()->sysname
, utsname()->machine
);
2881 subsys
= target_core_subsystem
[0];
2882 config_group_init(&subsys
->su_group
);
2883 mutex_init(&subsys
->su_mutex
);
2885 ret
= init_se_kmem_caches();
2889 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2890 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2892 target_cg
= &subsys
->su_group
;
2893 target_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2895 if (!target_cg
->default_groups
) {
2896 pr_err("Unable to allocate target_cg->default_groups\n");
2901 config_group_init_type_name(&target_core_hbagroup
,
2902 "core", &target_core_cit
);
2903 target_cg
->default_groups
[0] = &target_core_hbagroup
;
2904 target_cg
->default_groups
[1] = NULL
;
2906 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2908 hba_cg
= &target_core_hbagroup
;
2909 hba_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2911 if (!hba_cg
->default_groups
) {
2912 pr_err("Unable to allocate hba_cg->default_groups\n");
2916 config_group_init_type_name(&alua_group
,
2917 "alua", &target_core_alua_cit
);
2918 hba_cg
->default_groups
[0] = &alua_group
;
2919 hba_cg
->default_groups
[1] = NULL
;
2921 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2922 * groups under /sys/kernel/config/target/core/alua/
2924 alua_cg
= &alua_group
;
2925 alua_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2927 if (!alua_cg
->default_groups
) {
2928 pr_err("Unable to allocate alua_cg->default_groups\n");
2933 config_group_init_type_name(&alua_lu_gps_group
,
2934 "lu_gps", &target_core_alua_lu_gps_cit
);
2935 alua_cg
->default_groups
[0] = &alua_lu_gps_group
;
2936 alua_cg
->default_groups
[1] = NULL
;
2938 * Add core/alua/lu_gps/default_lu_gp
2940 lu_gp
= core_alua_allocate_lu_gp("default_lu_gp", 1);
2941 if (IS_ERR(lu_gp
)) {
2946 lu_gp_cg
= &alua_lu_gps_group
;
2947 lu_gp_cg
->default_groups
= kmalloc(sizeof(struct config_group
*) * 2,
2949 if (!lu_gp_cg
->default_groups
) {
2950 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2955 config_group_init_type_name(&lu_gp
->lu_gp_group
, "default_lu_gp",
2956 &target_core_alua_lu_gp_cit
);
2957 lu_gp_cg
->default_groups
[0] = &lu_gp
->lu_gp_group
;
2958 lu_gp_cg
->default_groups
[1] = NULL
;
2959 default_lu_gp
= lu_gp
;
2961 * Register the target_core_mod subsystem with configfs.
2963 ret
= configfs_register_subsystem(subsys
);
2965 pr_err("Error %d while registering subsystem %s\n",
2966 ret
, subsys
->su_group
.cg_item
.ci_namebuf
);
2969 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2970 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION
" on %s/%s"
2971 " on "UTS_RELEASE
"\n", utsname()->sysname
, utsname()->machine
);
2973 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2975 ret
= rd_module_init();
2979 ret
= core_dev_setup_virtual_lun0();
2983 ret
= target_xcopy_setup_pt();
2990 configfs_unregister_subsystem(subsys
);
2991 core_dev_release_virtual_lun0();
2994 if (default_lu_gp
) {
2995 core_alua_free_lu_gp(default_lu_gp
);
2996 default_lu_gp
= NULL
;
2999 kfree(lu_gp_cg
->default_groups
);
3001 kfree(alua_cg
->default_groups
);
3003 kfree(hba_cg
->default_groups
);
3004 kfree(target_cg
->default_groups
);
3005 release_se_kmem_caches();
3009 static void __exit
target_core_exit_configfs(void)
3011 struct configfs_subsystem
*subsys
;
3012 struct config_group
*hba_cg
, *alua_cg
, *lu_gp_cg
;
3013 struct config_item
*item
;
3016 subsys
= target_core_subsystem
[0];
3018 lu_gp_cg
= &alua_lu_gps_group
;
3019 for (i
= 0; lu_gp_cg
->default_groups
[i
]; i
++) {
3020 item
= &lu_gp_cg
->default_groups
[i
]->cg_item
;
3021 lu_gp_cg
->default_groups
[i
] = NULL
;
3022 config_item_put(item
);
3024 kfree(lu_gp_cg
->default_groups
);
3025 lu_gp_cg
->default_groups
= NULL
;
3027 alua_cg
= &alua_group
;
3028 for (i
= 0; alua_cg
->default_groups
[i
]; i
++) {
3029 item
= &alua_cg
->default_groups
[i
]->cg_item
;
3030 alua_cg
->default_groups
[i
] = NULL
;
3031 config_item_put(item
);
3033 kfree(alua_cg
->default_groups
);
3034 alua_cg
->default_groups
= NULL
;
3036 hba_cg
= &target_core_hbagroup
;
3037 for (i
= 0; hba_cg
->default_groups
[i
]; i
++) {
3038 item
= &hba_cg
->default_groups
[i
]->cg_item
;
3039 hba_cg
->default_groups
[i
] = NULL
;
3040 config_item_put(item
);
3042 kfree(hba_cg
->default_groups
);
3043 hba_cg
->default_groups
= NULL
;
3045 * We expect subsys->su_group.default_groups to be released
3046 * by configfs subsystem provider logic..
3048 configfs_unregister_subsystem(subsys
);
3049 kfree(subsys
->su_group
.default_groups
);
3051 core_alua_free_lu_gp(default_lu_gp
);
3052 default_lu_gp
= NULL
;
3054 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3055 " Infrastructure\n");
3057 core_dev_release_virtual_lun0();
3059 target_xcopy_release_pt();
3060 release_se_kmem_caches();
3063 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3064 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3065 MODULE_LICENSE("GPL");
3067 module_init(target_core_init_configfs
);
3068 module_exit(target_core_exit_configfs
);