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target: Drop signal_pending checks after interruptible lock acquire
[linux-2.6-block.git] / drivers / target / target_core_configfs.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
4c76251e 6 * (c) Copyright 2008-2013 Datera, Inc.
c66ac9db
NB		 7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
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.
16 *
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 ****************************************************************************/
22
23#include <linux/module.h>
24#include <linux/moduleparam.h>
c66ac9db
NB		 25#include <generated/utsrelease.h>
26#include <linux/utsname.h>
27#include <linux/init.h>
28#include <linux/fs.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>
e3d6f909 38#include <linux/spinlock.h>
c66ac9db
NB		 39
40#include <target/target_core_base.h>
c4795fb2
CH		 41#include <target/target_core_backend.h>
42#include <target/target_core_fabric.h>
c66ac9db
NB		 43#include <target/target_core_fabric_configfs.h>
44#include <target/target_core_configfs.h>
45#include <target/configfs_macros.h>
46
e26d99ae 47#include "target_core_internal.h"
c66ac9db 48#include "target_core_alua.h"
c66ac9db
NB		 49#include "target_core_pr.h"
50#include "target_core_rd.h"
f99715ac 51#include "target_core_xcopy.h"
c66ac9db 52
73112edc
NB		 53#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
54static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
55{ \
56 struct target_backend_cits *tbc = &sa->tb_cits; \
57 struct config_item_type *cit = &tbc->tb_##_name##_cit; \
58 \
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)); \
64}
65
e3d6f909
AG		 66extern struct t10_alua_lu_gp *default_lu_gp;
67
d0f474e5
RD		 68static LIST_HEAD(g_tf_list);
69static DEFINE_MUTEX(g_tf_lock);
c66ac9db
NB		 70
71struct target_core_configfs_attribute {
72 struct configfs_attribute attr;
73 ssize_t (*show)(void *, char *);
74 ssize_t (*store)(void *, const char *, size_t);
75};
76
e3d6f909
AG		 77static struct config_group target_core_hbagroup;
78static struct config_group alua_group;
79static struct config_group alua_lu_gps_group;
80
c66ac9db
NB		 81static inline struct se_hba *
82item_to_hba(struct config_item *item)
83{
84 return container_of(to_config_group(item), struct se_hba, hba_group);
85}
86
87/*
88 * Attributes for /sys/kernel/config/target/
89 */
90static ssize_t target_core_attr_show(struct config_item *item,
91 struct configfs_attribute *attr,
92 char *page)
93{
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);
97}
98
99static struct configfs_item_operations target_core_fabric_item_ops = {
100 .show_attribute = target_core_attr_show,
101};
102
103static struct configfs_attribute target_core_item_attr_version = {
104 .ca_owner = THIS_MODULE,
105 .ca_name = "version",
106 .ca_mode = S_IRUGO,
107};
108
109static struct target_fabric_configfs *target_core_get_fabric(
110 const char *name)
111{
112 struct target_fabric_configfs *tf;
113
6708bb27 114 if (!name)
c66ac9db
NB		 115 return NULL;
116
117 mutex_lock(&g_tf_lock);
118 list_for_each_entry(tf, &g_tf_list, tf_list) {
6708bb27 119 if (!strcmp(tf->tf_name, name)) {
c66ac9db
NB		 120 atomic_inc(&tf->tf_access_cnt);
121 mutex_unlock(&g_tf_lock);
122 return tf;
123 }
124 }
125 mutex_unlock(&g_tf_lock);
126
127 return NULL;
128}
129
130/*
131 * Called from struct target_core_group_ops->make_group()
132 */
133static struct config_group *target_core_register_fabric(
134 struct config_group *group,
135 const char *name)
136{
137 struct target_fabric_configfs *tf;
138 int ret;
139
6708bb27 140 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
c66ac9db 141 " %s\n", group, name);
e7b7af6e
RD		 142
143 tf = target_core_get_fabric(name);
144 if (!tf) {
62554910
NB		 145 pr_debug("target_core_register_fabric() trying autoload for %s\n",
146 name);
e7b7af6e 147
c66ac9db 148 /*
e7b7af6e
RD		 149 * Below are some hardcoded request_module() calls to automatically
150 * local fabric modules when the following is called:
c66ac9db 151 *
e7b7af6e 152 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
c66ac9db 153 *
e7b7af6e
RD		 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.
c66ac9db 157 */
e7b7af6e
RD		 158
159 if (!strncmp(name, "iscsi", 5)) {
160 /*
161 * Automatically load the LIO Target fabric module when the
162 * following is called:
163 *
164 * mkdir -p $CONFIGFS/target/iscsi
165 */
166 ret = request_module("iscsi_target_mod");
167 if (ret < 0) {
62554910
NB		 168 pr_debug("request_module() failed for"
169 " iscsi_target_mod.ko: %d\n", ret);
e7b7af6e
RD		 170 return ERR_PTR(-EINVAL);
171 }
172 } else if (!strncmp(name, "loopback", 8)) {
173 /*
174 * Automatically load the tcm_loop fabric module when the
175 * following is called:
176 *
177 * mkdir -p $CONFIGFS/target/loopback
178 */
179 ret = request_module("tcm_loop");
180 if (ret < 0) {
62554910
NB		 181 pr_debug("request_module() failed for"
182 " tcm_loop.ko: %d\n", ret);
e7b7af6e
RD		 183 return ERR_PTR(-EINVAL);
184 }
c66ac9db 185 }
e7b7af6e
RD		 186
187 tf = target_core_get_fabric(name);
c66ac9db
NB		 188 }
189
6708bb27 190 if (!tf) {
62554910
NB		 191 pr_debug("target_core_get_fabric() failed for %s\n",
192 name);
c66ac9db
NB		 193 return ERR_PTR(-EINVAL);
194 }
6708bb27 195 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
c66ac9db
NB		 196 " %s\n", tf->tf_name);
197 /*
198 * On a successful target_core_get_fabric() look, the returned
199 * struct target_fabric_configfs *tf will contain a usage reference.
200 */
6708bb27 201 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
d80e224d 202 &tf->tf_cit_tmpl.tfc_wwn_cit);
c66ac9db
NB		 203
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;
207
208 config_group_init_type_name(&tf->tf_group, name,
d80e224d 209 &tf->tf_cit_tmpl.tfc_wwn_cit);
c66ac9db 210 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
d80e224d 211 &tf->tf_cit_tmpl.tfc_discovery_cit);
c66ac9db 212
6708bb27 213 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
c66ac9db
NB		 214 " %s\n", tf->tf_group.cg_item.ci_name);
215 /*
216 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
217 */
218 tf->tf_ops.tf_subsys = tf->tf_subsys;
219 tf->tf_fabric = &tf->tf_group.cg_item;
6708bb27 220 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
c66ac9db
NB		 221 " for %s\n", name);
222
223 return &tf->tf_group;
224}
225
226/*
227 * Called from struct target_core_group_ops->drop_item()
228 */
229static void target_core_deregister_fabric(
230 struct config_group *group,
231 struct config_item *item)
232{
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;
237 int i;
238
6708bb27 239 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
c66ac9db
NB		 240 " tf list\n", config_item_name(item));
241
6708bb27 242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
c66ac9db
NB		 243 " %s\n", tf->tf_name);
244 atomic_dec(&tf->tf_access_cnt);
245
6708bb27 246 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
c66ac9db
NB		 247 " tf->tf_fabric for %s\n", tf->tf_name);
248 tf->tf_fabric = NULL;
249
6708bb27 250 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
c66ac9db
NB		 251 " %s\n", config_item_name(item));
252
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);
258 }
259 config_item_put(item);
260}
261
262static struct configfs_group_operations target_core_fabric_group_ops = {
263 .make_group = &target_core_register_fabric,
264 .drop_item = &target_core_deregister_fabric,
265};
266
267/*
268 * All item attributes appearing in /sys/kernel/target/ appear here.
269 */
270static struct configfs_attribute *target_core_fabric_item_attrs[] = {
271 &target_core_item_attr_version,
272 NULL,
273};
274
275/*
276 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
277 */
278static 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,
283};
284
285static struct configfs_subsystem target_core_fabrics = {
286 .su_group = {
287 .cg_item = {
288 .ci_namebuf = "target",
289 .ci_type = &target_core_fabrics_item,
290 },
291 },
292};
293
56d128fa 294struct configfs_subsystem *target_core_subsystem[] = {
c66ac9db
NB		 295 &target_core_fabrics,
296 NULL,
297};
298
299/*##############################################################################
300// Start functions called by external Target Fabrics Modules
301//############################################################################*/
302
9ac8928e 303static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
c66ac9db 304{
9ac8928e
CH		 305 if (!tfo->name) {
306 pr_err("Missing tfo->name\n");
307 return -EINVAL;
c66ac9db 308 }
9ac8928e 309 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
6708bb27 310 pr_err("Passed name: %s exceeds TARGET_FABRIC"
9ac8928e
CH		 311 "_NAME_SIZE\n", tfo->name);
312 return -EINVAL;
c66ac9db 313 }
6708bb27
AG		 314 if (!tfo->get_fabric_name) {
315 pr_err("Missing tfo->get_fabric_name()\n");
c66ac9db
NB		 316 return -EINVAL;
317 }
6708bb27
AG		 318 if (!tfo->get_fabric_proto_ident) {
319 pr_err("Missing tfo->get_fabric_proto_ident()\n");
c66ac9db
NB		 320 return -EINVAL;
321 }
6708bb27
AG		 322 if (!tfo->tpg_get_wwn) {
323 pr_err("Missing tfo->tpg_get_wwn()\n");
c66ac9db
NB		 324 return -EINVAL;
325 }
6708bb27
AG		 326 if (!tfo->tpg_get_tag) {
327 pr_err("Missing tfo->tpg_get_tag()\n");
c66ac9db
NB		 328 return -EINVAL;
329 }
6708bb27
AG		 330 if (!tfo->tpg_get_default_depth) {
331 pr_err("Missing tfo->tpg_get_default_depth()\n");
c66ac9db
NB		 332 return -EINVAL;
333 }
6708bb27
AG		 334 if (!tfo->tpg_get_pr_transport_id) {
335 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
c66ac9db
NB		 336 return -EINVAL;
337 }
6708bb27
AG		 338 if (!tfo->tpg_get_pr_transport_id_len) {
339 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
c66ac9db
NB		 340 return -EINVAL;
341 }
6708bb27
AG		 342 if (!tfo->tpg_check_demo_mode) {
343 pr_err("Missing tfo->tpg_check_demo_mode()\n");
c66ac9db
NB		 344 return -EINVAL;
345 }
6708bb27
AG		 346 if (!tfo->tpg_check_demo_mode_cache) {
347 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
c66ac9db
NB		 348 return -EINVAL;
349 }
6708bb27
AG		 350 if (!tfo->tpg_check_demo_mode_write_protect) {
351 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
c66ac9db
NB		 352 return -EINVAL;
353 }
6708bb27
AG		 354 if (!tfo->tpg_check_prod_mode_write_protect) {
355 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
c66ac9db
NB		 356 return -EINVAL;
357 }
6708bb27
AG		 358 if (!tfo->tpg_alloc_fabric_acl) {
359 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
c66ac9db
NB		 360 return -EINVAL;
361 }
6708bb27
AG		 362 if (!tfo->tpg_release_fabric_acl) {
363 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
c66ac9db
NB		 364 return -EINVAL;
365 }
6708bb27
AG		 366 if (!tfo->tpg_get_inst_index) {
367 pr_err("Missing tfo->tpg_get_inst_index()\n");
c66ac9db
NB		 368 return -EINVAL;
369 }
35462975 370 if (!tfo->release_cmd) {
6708bb27 371 pr_err("Missing tfo->release_cmd()\n");
c66ac9db
NB		 372 return -EINVAL;
373 }
6708bb27
AG		 374 if (!tfo->shutdown_session) {
375 pr_err("Missing tfo->shutdown_session()\n");
c66ac9db
NB		 376 return -EINVAL;
377 }
6708bb27
AG		 378 if (!tfo->close_session) {
379 pr_err("Missing tfo->close_session()\n");
c66ac9db
NB		 380 return -EINVAL;
381 }
6708bb27
AG		 382 if (!tfo->sess_get_index) {
383 pr_err("Missing tfo->sess_get_index()\n");
c66ac9db
NB		 384 return -EINVAL;
385 }
6708bb27
AG		 386 if (!tfo->write_pending) {
387 pr_err("Missing tfo->write_pending()\n");
c66ac9db
NB		 388 return -EINVAL;
389 }
6708bb27
AG		 390 if (!tfo->write_pending_status) {
391 pr_err("Missing tfo->write_pending_status()\n");
c66ac9db
NB		 392 return -EINVAL;
393 }
6708bb27
AG		 394 if (!tfo->set_default_node_attributes) {
395 pr_err("Missing tfo->set_default_node_attributes()\n");
c66ac9db
NB		 396 return -EINVAL;
397 }
6708bb27
AG		 398 if (!tfo->get_task_tag) {
399 pr_err("Missing tfo->get_task_tag()\n");
c66ac9db
NB		 400 return -EINVAL;
401 }
6708bb27
AG		 402 if (!tfo->get_cmd_state) {
403 pr_err("Missing tfo->get_cmd_state()\n");
c66ac9db
NB		 404 return -EINVAL;
405 }
6708bb27
AG		 406 if (!tfo->queue_data_in) {
407 pr_err("Missing tfo->queue_data_in()\n");
c66ac9db
NB		 408 return -EINVAL;
409 }
6708bb27
AG		 410 if (!tfo->queue_status) {
411 pr_err("Missing tfo->queue_status()\n");
c66ac9db
NB		 412 return -EINVAL;
413 }
6708bb27
AG		 414 if (!tfo->queue_tm_rsp) {
415 pr_err("Missing tfo->queue_tm_rsp()\n");
c66ac9db
NB		 416 return -EINVAL;
417 }
131e6abc
NB		 418 if (!tfo->aborted_task) {
419 pr_err("Missing tfo->aborted_task()\n");
420 return -EINVAL;
421 }
c66ac9db
NB		 422 /*
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.
426 */
6708bb27
AG		 427 if (!tfo->fabric_make_wwn) {
428 pr_err("Missing tfo->fabric_make_wwn()\n");
c66ac9db
NB		 429 return -EINVAL;
430 }
6708bb27
AG		 431 if (!tfo->fabric_drop_wwn) {
432 pr_err("Missing tfo->fabric_drop_wwn()\n");
c66ac9db
NB		 433 return -EINVAL;
434 }
6708bb27
AG		 435 if (!tfo->fabric_make_tpg) {
436 pr_err("Missing tfo->fabric_make_tpg()\n");
c66ac9db
NB		 437 return -EINVAL;
438 }
6708bb27
AG		 439 if (!tfo->fabric_drop_tpg) {
440 pr_err("Missing tfo->fabric_drop_tpg()\n");
c66ac9db
NB		 441 return -EINVAL;
442 }
443
444 return 0;
445}
446
9ac8928e 447int target_register_template(const struct target_core_fabric_ops *fo)
c66ac9db 448{
9ac8928e 449 struct target_fabric_configfs *tf;
c66ac9db
NB		 450 int ret;
451
9ac8928e
CH		 452 ret = target_fabric_tf_ops_check(fo);
453 if (ret)
454 return ret;
455
456 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
6708bb27 457 if (!tf) {
9ac8928e
CH		 458 pr_err("%s: could not allocate memory!\n", __func__);
459 return -ENOMEM;
c66ac9db 460 }
c66ac9db 461
9ac8928e
CH		 462 INIT_LIST_HEAD(&tf->tf_list);
463 atomic_set(&tf->tf_access_cnt, 0);
464
465 /*
466 * Setup the default generic struct config_item_type's (cits) in
467 * struct target_fabric_configfs->tf_cit_tmpl
468 */
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);
472
473 tf->tf_ops = *fo;
474 target_fabric_setup_cits(tf);
475
476 mutex_lock(&g_tf_lock);
477 list_add_tail(&tf->tf_list, &g_tf_list);
478 mutex_unlock(&g_tf_lock);
479
c66ac9db
NB		 480 return 0;
481}
9ac8928e 482EXPORT_SYMBOL(target_register_template);
c66ac9db 483
9ac8928e 484void target_unregister_template(const struct target_core_fabric_ops *fo)
c66ac9db 485{
9ac8928e 486 struct target_fabric_configfs *t;
c66ac9db 487
c66ac9db 488 mutex_lock(&g_tf_lock);
9ac8928e
CH		 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);
493 kfree(t);
494 break;
495 }
c66ac9db 496 }
c66ac9db 497 mutex_unlock(&g_tf_lock);
c66ac9db 498}
9ac8928e 499EXPORT_SYMBOL(target_unregister_template);
c66ac9db
NB		 500
501/*##############################################################################
502// Stop functions called by external Target Fabrics Modules
503//############################################################################*/
504
f79a897e 505/* Start functions for struct config_item_type tb_dev_attrib_cit */
c66ac9db 506
c66ac9db 507CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
c66ac9db
NB		 508CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
509
c66ac9db
NB		 510static 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,
513};
514
43cf208c 515TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
c66ac9db 516
f79a897e 517/* End functions for struct config_item_type tb_dev_attrib_cit */
c66ac9db 518
f8d389c6 519/* Start functions for struct config_item_type tb_dev_wwn_cit */
c66ac9db
NB		 520
521CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
522#define SE_DEV_WWN_ATTR(_name, _mode) \
523static 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);
527
528#define SE_DEV_WWN_ATTR_RO(_name); \
529do { \
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); \
534} while (0);
535
536/*
537 * VPD page 0x80 Unit serial
538 */
539static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
540 struct t10_wwn *t10_wwn,
541 char *page)
542{
c66ac9db
NB		 543 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
544 &t10_wwn->unit_serial[0]);
545}
546
547static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
548 struct t10_wwn *t10_wwn,
549 const char *page,
550 size_t count)
551{
0fd97ccf 552 struct se_device *dev = t10_wwn->t10_dev;
c66ac9db
NB		 553 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
554
555 /*
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.
559 *
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.
564 */
0fd97ccf 565 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
6708bb27 566 pr_err("Underlying SCSI device firmware provided VPD"
c66ac9db
NB		 567 " Unit Serial, ignoring request\n");
568 return -EOPNOTSUPP;
569 }
570
60d645a4 571 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
6708bb27 572 pr_err("Emulated VPD Unit Serial exceeds"
c66ac9db
NB		 573 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
574 return -EOVERFLOW;
575 }
576 /*
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.
581 */
0fd97ccf
CH		 582 if (dev->export_count) {
583 pr_err("Unable to set VPD Unit Serial while"
584 " active %d $FABRIC_MOD exports exist\n",
585 dev->export_count);
586 return -EINVAL;
c66ac9db 587 }
0fd97ccf 588
c66ac9db
NB		 589 /*
590 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
591 *
592 * Also, strip any newline added from the userspace
593 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
594 */
595 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
596 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
0fd97ccf 597 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
c66ac9db 598 "%s", strstrip(buf));
0fd97ccf 599 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
c66ac9db 600
6708bb27 601 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
0fd97ccf 602 " %s\n", dev->t10_wwn.unit_serial);
c66ac9db
NB		 603
604 return count;
605}
606
607SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
608
609/*
610 * VPD page 0x83 Protocol Identifier
611 */
612static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
613 struct t10_wwn *t10_wwn,
614 char *page)
615{
c66ac9db
NB		 616 struct t10_vpd *vpd;
617 unsigned char buf[VPD_TMP_BUF_SIZE];
618 ssize_t len = 0;
619
c66ac9db
NB		 620 memset(buf, 0, VPD_TMP_BUF_SIZE);
621
622 spin_lock(&t10_wwn->t10_vpd_lock);
623 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
6708bb27 624 if (!vpd->protocol_identifier_set)
c66ac9db
NB		 625 continue;
626
627 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
628
6708bb27 629 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 630 break;
631
632 len += sprintf(page+len, "%s", buf);
633 }
634 spin_unlock(&t10_wwn->t10_vpd_lock);
635
636 return len;
637}
638
639static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
640 struct t10_wwn *t10_wwn,
641 const char *page,
642 size_t count)
643{
644 return -ENOSYS;
645}
646
647SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
648
649/*
650 * Generic wrapper for dumping VPD identifiers by association.
651 */
652#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
653static ssize_t target_core_dev_wwn_show_attr_##_name( \
654 struct t10_wwn *t10_wwn, \
655 char *page) \
656{ \
c66ac9db
NB		 657 struct t10_vpd *vpd; \
658 unsigned char buf[VPD_TMP_BUF_SIZE]; \
659 ssize_t len = 0; \
660 \
c66ac9db
NB		 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) \
664 continue; \
665 \
666 memset(buf, 0, VPD_TMP_BUF_SIZE); \
667 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 668 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 669 break; \
670 len += sprintf(page+len, "%s", buf); \
671 \
672 memset(buf, 0, VPD_TMP_BUF_SIZE); \
673 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 674 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 675 break; \
676 len += sprintf(page+len, "%s", buf); \
677 \
678 memset(buf, 0, VPD_TMP_BUF_SIZE); \
679 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 680 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 681 break; \
682 len += sprintf(page+len, "%s", buf); \
683 } \
684 spin_unlock(&t10_wwn->t10_vpd_lock); \
685 \
686 return len; \
687}
688
689/*
163cd5fa 690 * VPD page 0x83 Association: Logical Unit
c66ac9db
NB		 691 */
692DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
693
694static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
695 struct t10_wwn *t10_wwn,
696 const char *page,
697 size_t count)
698{
699 return -ENOSYS;
700}
701
702SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
703
704/*
705 * VPD page 0x83 Association: Target Port
706 */
707DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
708
709static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
710 struct t10_wwn *t10_wwn,
711 const char *page,
712 size_t count)
713{
714 return -ENOSYS;
715}
716
717SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
718
719/*
720 * VPD page 0x83 Association: SCSI Target Device
721 */
722DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
723
724static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
725 struct t10_wwn *t10_wwn,
726 const char *page,
727 size_t count)
728{
729 return -ENOSYS;
730}
731
732SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
733
734CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
735
736static 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,
742 NULL,
743};
744
745static 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,
748};
749
f8d389c6 750TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
c66ac9db 751
f8d389c6 752/* End functions for struct config_item_type tb_dev_wwn_cit */
c66ac9db 753
91e2e39b 754/* Start functions for struct config_item_type tb_dev_pr_cit */
c66ac9db 755
0fd97ccf 756CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
c66ac9db
NB		 757#define SE_DEV_PR_ATTR(_name, _mode) \
758static 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);
762
763#define SE_DEV_PR_ATTR_RO(_name); \
764static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
765 __CONFIGFS_EATTR_RO(_name, \
766 target_core_dev_pr_show_attr_##_name);
767
d977f437
CH		 768static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
769 char *page)
c66ac9db
NB		 770{
771 struct se_node_acl *se_nacl;
772 struct t10_pr_registration *pr_reg;
773 char i_buf[PR_REG_ISID_ID_LEN];
c66ac9db
NB		 774
775 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
776
c66ac9db 777 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 778 if (!pr_reg)
779 return sprintf(page, "No SPC-3 Reservation holder\n");
780
c66ac9db 781 se_nacl = pr_reg->pr_reg_nacl;
d2843c17 782 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
c66ac9db 783
d977f437 784 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
e3d6f909 785 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
d2843c17 786 se_nacl->initiatorname, i_buf);
c66ac9db
NB		 787}
788
d977f437
CH		 789static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
790 char *page)
c66ac9db
NB		 791{
792 struct se_node_acl *se_nacl;
d977f437 793 ssize_t len;
c66ac9db 794
c66ac9db 795 se_nacl = dev->dev_reserved_node_acl;
d977f437
CH		 796 if (se_nacl) {
797 len = sprintf(page,
798 "SPC-2 Reservation: %s Initiator: %s\n",
799 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
800 se_nacl->initiatorname);
801 } else {
802 len = sprintf(page, "No SPC-2 Reservation holder\n");
c66ac9db 803 }
d977f437 804 return len;
c66ac9db
NB		 805}
806
0fd97ccf
CH		 807static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
808 char *page)
c66ac9db 809{
d977f437 810 int ret;
c66ac9db 811
d977f437
CH		 812 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
813 return sprintf(page, "Passthrough\n");
c66ac9db 814
d977f437
CH		 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);
818 else
819 ret = target_core_dev_pr_show_spc3_res(dev, page);
820 spin_unlock(&dev->dev_reservation_lock);
821 return ret;
c66ac9db
NB		 822}
823
824SE_DEV_PR_ATTR_RO(res_holder);
825
c66ac9db 826static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
0fd97ccf 827 struct se_device *dev, char *page)
c66ac9db 828{
c66ac9db
NB		 829 ssize_t len = 0;
830
c66ac9db 831 spin_lock(&dev->dev_reservation_lock);
d977f437 832 if (!dev->dev_pr_res_holder) {
c66ac9db 833 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 834 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
c66ac9db
NB		 835 len = sprintf(page, "SPC-3 Reservation: All Target"
836 " Ports registration\n");
d977f437 837 } else {
c66ac9db
NB		 838 len = sprintf(page, "SPC-3 Reservation: Single"
839 " Target Port registration\n");
d977f437 840 }
c66ac9db 841
d977f437 842 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 843 return len;
844}
845
846SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
847
c66ac9db 848static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
0fd97ccf 849 struct se_device *dev, char *page)
c66ac9db 850{
0fd97ccf 851 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
c66ac9db
NB		 852}
853
854SE_DEV_PR_ATTR_RO(res_pr_generation);
855
856/*
857 * res_pr_holder_tg_port
858 */
859static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
0fd97ccf 860 struct se_device *dev, char *page)
c66ac9db 861{
c66ac9db
NB		 862 struct se_node_acl *se_nacl;
863 struct se_lun *lun;
864 struct se_portal_group *se_tpg;
865 struct t10_pr_registration *pr_reg;
9ac8928e 866 const struct target_core_fabric_ops *tfo;
c66ac9db
NB		 867 ssize_t len = 0;
868
c66ac9db
NB		 869 spin_lock(&dev->dev_reservation_lock);
870 pr_reg = dev->dev_pr_res_holder;
6708bb27 871 if (!pr_reg) {
c66ac9db 872 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 873 goto out_unlock;
c66ac9db 874 }
d977f437 875
c66ac9db
NB		 876 se_nacl = pr_reg->pr_reg_nacl;
877 se_tpg = se_nacl->se_tpg;
878 lun = pr_reg->pr_reg_tg_pt_lun;
e3d6f909 879 tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 880
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"
35d1efe8 885 " Identifier Tag: %hu %s Portal Group Tag: %hu"
c66ac9db
NB		 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);
c66ac9db 889
d977f437
CH		 890out_unlock:
891 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 892 return len;
893}
894
895SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
896
c66ac9db 897static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
0fd97ccf 898 struct se_device *dev, char *page)
c66ac9db 899{
9ac8928e 900 const struct target_core_fabric_ops *tfo;
c66ac9db
NB		 901 struct t10_pr_registration *pr_reg;
902 unsigned char buf[384];
903 char i_buf[PR_REG_ISID_ID_LEN];
904 ssize_t len = 0;
d2843c17 905 int reg_count = 0;
c66ac9db 906
c66ac9db
NB		 907 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
908
0fd97ccf
CH		 909 spin_lock(&dev->t10_pr.registration_lock);
910 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
c66ac9db
NB		 911 pr_reg_list) {
912
913 memset(buf, 0, 384);
914 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
915 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
d2843c17 916 core_pr_dump_initiator_port(pr_reg, i_buf,
c66ac9db
NB		 917 PR_REG_ISID_ID_LEN);
918 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
919 tfo->get_fabric_name(),
d2843c17 920 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
c66ac9db
NB		 921 pr_reg->pr_res_generation);
922
6708bb27 923 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 924 break;
925
926 len += sprintf(page+len, "%s", buf);
927 reg_count++;
928 }
0fd97ccf 929 spin_unlock(&dev->t10_pr.registration_lock);
c66ac9db 930
6708bb27 931 if (!reg_count)
c66ac9db
NB		 932 len += sprintf(page+len, "None\n");
933
934 return len;
935}
936
937SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
938
c66ac9db 939static ssize_t target_core_dev_pr_show_attr_res_pr_type(
0fd97ccf 940 struct se_device *dev, char *page)
c66ac9db 941{
c66ac9db
NB		 942 struct t10_pr_registration *pr_reg;
943 ssize_t len = 0;
944
c66ac9db
NB		 945 spin_lock(&dev->dev_reservation_lock);
946 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 947 if (pr_reg) {
948 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
949 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
950 } else {
c66ac9db 951 len = sprintf(page, "No SPC-3 Reservation holder\n");
c66ac9db 952 }
c66ac9db 953
d977f437 954 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 955 return len;
956}
957
958SE_DEV_PR_ATTR_RO(res_pr_type);
959
c66ac9db 960static ssize_t target_core_dev_pr_show_attr_res_type(
0fd97ccf 961 struct se_device *dev, char *page)
c66ac9db 962{
d977f437
CH		 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");
967 else
968 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
c66ac9db
NB		 969}
970
971SE_DEV_PR_ATTR_RO(res_type);
972
c66ac9db 973static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
0fd97ccf 974 struct se_device *dev, char *page)
c66ac9db 975{
d977f437 976 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
c66ac9db
NB		 977 return 0;
978
979 return sprintf(page, "APTPL Bit Status: %s\n",
0fd97ccf 980 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
c66ac9db
NB		 981}
982
983SE_DEV_PR_ATTR_RO(res_aptpl_active);
984
985/*
986 * res_aptpl_metadata
987 */
988static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
0fd97ccf 989 struct se_device *dev, char *page)
c66ac9db 990{
d977f437 991 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
c66ac9db
NB		 992 return 0;
993
994 return sprintf(page, "Ready to process PR APTPL metadata..\n");
995}
996
997enum {
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
1002};
1003
1004static 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"},
1019 {Opt_err, NULL}
1020};
1021
1022static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
0fd97ccf 1023 struct se_device *dev,
c66ac9db
NB		 1024 const char *page,
1025 size_t count)
1026{
6d180253
JJ		 1027 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1028 unsigned char *t_fabric = NULL, *t_port = NULL;
8d213559 1029 char *orig, *ptr, *opts;
c66ac9db
NB		 1030 substring_t args[MAX_OPT_ARGS];
1031 unsigned long long tmp_ll;
1032 u64 sa_res_key = 0;
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;
1036 u8 type = 0, scope;
1037
d977f437
CH		 1038 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1039 return 0;
1040 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
c66ac9db
NB		 1041 return 0;
1042
0fd97ccf 1043 if (dev->export_count) {
6708bb27 1044 pr_debug("Unable to process APTPL metadata while"
c66ac9db
NB		 1045 " active fabric exports exist\n");
1046 return -EINVAL;
1047 }
1048
1049 opts = kstrdup(page, GFP_KERNEL);
1050 if (!opts)
1051 return -ENOMEM;
1052
1053 orig = opts;
90c161b6 1054 while ((ptr = strsep(&opts, ",\n")) != NULL) {
c66ac9db
NB		 1055 if (!*ptr)
1056 continue;
1057
1058 token = match_token(ptr, tokens, args);
1059 switch (token) {
1060 case Opt_initiator_fabric:
8d213559 1061 i_fabric = match_strdup(args);
6d180253
JJ		 1062 if (!i_fabric) {
1063 ret = -ENOMEM;
1064 goto out;
1065 }
c66ac9db
NB		 1066 break;
1067 case Opt_initiator_node:
8d213559 1068 i_port = match_strdup(args);
6d180253
JJ		 1069 if (!i_port) {
1070 ret = -ENOMEM;
1071 goto out;
1072 }
60d645a4 1073 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
6708bb27 1074 pr_err("APTPL metadata initiator_node="
c66ac9db
NB		 1075 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1076 PR_APTPL_MAX_IPORT_LEN);
1077 ret = -EINVAL;
1078 break;
1079 }
1080 break;
1081 case Opt_initiator_sid:
8d213559 1082 isid = match_strdup(args);
6d180253
JJ		 1083 if (!isid) {
1084 ret = -ENOMEM;
1085 goto out;
1086 }
60d645a4 1087 if (strlen(isid) >= PR_REG_ISID_LEN) {
6708bb27 1088 pr_err("APTPL metadata initiator_isid"
c66ac9db
NB		 1089 "= exceeds PR_REG_ISID_LEN: %d\n",
1090 PR_REG_ISID_LEN);
1091 ret = -EINVAL;
1092 break;
1093 }
1094 break;
1095 case Opt_sa_res_key:
8d213559 1096 ret = kstrtoull(args->from, 0, &tmp_ll);
c66ac9db 1097 if (ret < 0) {
8d213559 1098 pr_err("kstrtoull() failed for sa_res_key=\n");
c66ac9db
NB		 1099 goto out;
1100 }
1101 sa_res_key = (u64)tmp_ll;
1102 break;
1103 /*
1104 * PR APTPL Metadata for Reservation
1105 */
1106 case Opt_res_holder:
1107 match_int(args, &arg);
1108 res_holder = arg;
1109 break;
1110 case Opt_res_type:
1111 match_int(args, &arg);
1112 type = (u8)arg;
1113 break;
1114 case Opt_res_scope:
1115 match_int(args, &arg);
1116 scope = (u8)arg;
1117 break;
1118 case Opt_res_all_tg_pt:
1119 match_int(args, &arg);
1120 all_tg_pt = (int)arg;
1121 break;
1122 case Opt_mapped_lun:
1123 match_int(args, &arg);
1124 mapped_lun = (u32)arg;
1125 break;
1126 /*
1127 * PR APTPL Metadata for Target Port
1128 */
1129 case Opt_target_fabric:
8d213559 1130 t_fabric = match_strdup(args);
6d180253
JJ		 1131 if (!t_fabric) {
1132 ret = -ENOMEM;
1133 goto out;
1134 }
c66ac9db
NB		 1135 break;
1136 case Opt_target_node:
8d213559 1137 t_port = match_strdup(args);
6d180253
JJ		 1138 if (!t_port) {
1139 ret = -ENOMEM;
1140 goto out;
1141 }
60d645a4 1142 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
6708bb27 1143 pr_err("APTPL metadata target_node="
c66ac9db
NB		 1144 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1145 PR_APTPL_MAX_TPORT_LEN);
1146 ret = -EINVAL;
1147 break;
1148 }
1149 break;
1150 case Opt_tpgt:
1151 match_int(args, &arg);
1152 tpgt = (u16)arg;
1153 break;
1154 case Opt_port_rtpi:
1155 match_int(args, &arg);
1156 port_rpti = (u16)arg;
1157 break;
1158 case Opt_target_lun:
1159 match_int(args, &arg);
1160 target_lun = (u32)arg;
1161 break;
1162 default:
1163 break;
1164 }
1165 }
1166
6708bb27
AG		 1167 if (!i_port || !t_port || !sa_res_key) {
1168 pr_err("Illegal parameters for APTPL registration\n");
c66ac9db
NB		 1169 ret = -EINVAL;
1170 goto out;
1171 }
1172
1173 if (res_holder && !(type)) {
6708bb27 1174 pr_err("Illegal PR type: 0x%02x for reservation"
c66ac9db
NB		 1175 " holder\n", type);
1176 ret = -EINVAL;
1177 goto out;
1178 }
1179
0fd97ccf 1180 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
c66ac9db
NB		 1181 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1182 res_holder, all_tg_pt, type);
1183out:
6d180253
JJ		 1184 kfree(i_fabric);
1185 kfree(i_port);
1186 kfree(isid);
1187 kfree(t_fabric);
1188 kfree(t_port);
c66ac9db
NB		 1189 kfree(orig);
1190 return (ret == 0) ? count : ret;
1191}
1192
1193SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1194
0fd97ccf 1195CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
c66ac9db
NB		 1196
1197static 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,
1207 NULL,
1208};
1209
1210static 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,
1213};
1214
91e2e39b 1215TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
c66ac9db 1216
91e2e39b 1217/* End functions for struct config_item_type tb_dev_pr_cit */
c66ac9db 1218
73112edc 1219/* Start functions for struct config_item_type tb_dev_cit */
c66ac9db
NB		 1220
1221static ssize_t target_core_show_dev_info(void *p, char *page)
1222{
0fd97ccf
CH		 1223 struct se_device *dev = p;
1224 struct se_subsystem_api *t = dev->transport;
c66ac9db
NB		 1225 int bl = 0;
1226 ssize_t read_bytes = 0;
1227
0fd97ccf 1228 transport_dump_dev_state(dev, page, &bl);
c66ac9db 1229 read_bytes += bl;
0fd97ccf 1230 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
c66ac9db
NB		 1231 return read_bytes;
1232}
1233
1234static struct target_core_configfs_attribute target_core_attr_dev_info = {
1235 .attr = { .ca_owner = THIS_MODULE,
1236 .ca_name = "info",
1237 .ca_mode = S_IRUGO },
1238 .show = target_core_show_dev_info,
1239 .store = NULL,
1240};
1241
1242static ssize_t target_core_store_dev_control(
1243 void *p,
1244 const char *page,
1245 size_t count)
1246{
0fd97ccf
CH		 1247 struct se_device *dev = p;
1248 struct se_subsystem_api *t = dev->transport;
c66ac9db 1249
0fd97ccf 1250 return t->set_configfs_dev_params(dev, page, count);
c66ac9db
NB		 1251}
1252
1253static 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 },
1257 .show = NULL,
1258 .store = target_core_store_dev_control,
1259};
1260
1261static ssize_t target_core_show_dev_alias(void *p, char *page)
1262{
0fd97ccf 1263 struct se_device *dev = p;
c66ac9db 1264
0fd97ccf 1265 if (!(dev->dev_flags & DF_USING_ALIAS))
c66ac9db
NB		 1266 return 0;
1267
0fd97ccf 1268 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
c66ac9db
NB		 1269}
1270
1271static ssize_t target_core_store_dev_alias(
1272 void *p,
1273 const char *page,
1274 size_t count)
1275{
0fd97ccf
CH		 1276 struct se_device *dev = p;
1277 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1278 ssize_t read_bytes;
1279
1280 if (count > (SE_DEV_ALIAS_LEN-1)) {
6708bb27 1281 pr_err("alias count: %d exceeds"
c66ac9db
NB		 1282 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1283 SE_DEV_ALIAS_LEN-1);
1284 return -EINVAL;
1285 }
1286
0fd97ccf 1287 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
3011684c
DC		 1288 if (!read_bytes)
1289 return -EINVAL;
0fd97ccf
CH		 1290 if (dev->dev_alias[read_bytes - 1] == '\n')
1291 dev->dev_alias[read_bytes - 1] = '\0';
0877eafd 1292
0fd97ccf 1293 dev->dev_flags |= DF_USING_ALIAS;
3011684c 1294
6708bb27 1295 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
c66ac9db 1296 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1297 config_item_name(&dev->dev_group.cg_item),
1298 dev->dev_alias);
c66ac9db
NB		 1299
1300 return read_bytes;
1301}
1302
1303static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1304 .attr = { .ca_owner = THIS_MODULE,
1305 .ca_name = "alias",
1306 .ca_mode = S_IRUGO | S_IWUSR },
1307 .show = target_core_show_dev_alias,
1308 .store = target_core_store_dev_alias,
1309};
1310
1311static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1312{
0fd97ccf 1313 struct se_device *dev = p;
c66ac9db 1314
0fd97ccf 1315 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
c66ac9db
NB		 1316 return 0;
1317
0fd97ccf 1318 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
c66ac9db
NB		 1319}
1320
1321static ssize_t target_core_store_dev_udev_path(
1322 void *p,
1323 const char *page,
1324 size_t count)
1325{
0fd97ccf
CH		 1326 struct se_device *dev = p;
1327 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1328 ssize_t read_bytes;
1329
1330 if (count > (SE_UDEV_PATH_LEN-1)) {
6708bb27 1331 pr_err("udev_path count: %d exceeds"
c66ac9db
NB		 1332 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1333 SE_UDEV_PATH_LEN-1);
1334 return -EINVAL;
1335 }
1336
0fd97ccf 1337 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
c66ac9db 1338 "%s", page);
3011684c
DC		 1339 if (!read_bytes)
1340 return -EINVAL;
0fd97ccf
CH		 1341 if (dev->udev_path[read_bytes - 1] == '\n')
1342 dev->udev_path[read_bytes - 1] = '\0';
0877eafd 1343
0fd97ccf 1344 dev->dev_flags |= DF_USING_UDEV_PATH;
3011684c 1345
6708bb27 1346 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
c66ac9db 1347 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1348 config_item_name(&dev->dev_group.cg_item),
1349 dev->udev_path);
c66ac9db
NB		 1350
1351 return read_bytes;
1352}
1353
1354static 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,
1360};
1361
64146db7
AG		 1362static ssize_t target_core_show_dev_enable(void *p, char *page)
1363{
1364 struct se_device *dev = p;
1365
1366 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1367}
1368
c66ac9db
NB		 1369static ssize_t target_core_store_dev_enable(
1370 void *p,
1371 const char *page,
1372 size_t count)
1373{
0fd97ccf 1374 struct se_device *dev = p;
c66ac9db 1375 char *ptr;
0fd97ccf 1376 int ret;
c66ac9db
NB		 1377
1378 ptr = strstr(page, "1");
6708bb27
AG		 1379 if (!ptr) {
1380 pr_err("For dev_enable ops, only valid value"
c66ac9db
NB		 1381 " is \"1\"\n");
1382 return -EINVAL;
1383 }
c66ac9db 1384
0fd97ccf
CH		 1385 ret = target_configure_device(dev);
1386 if (ret)
1387 return ret;
c66ac9db
NB		 1388 return count;
1389}
1390
1391static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1392 .attr = { .ca_owner = THIS_MODULE,
1393 .ca_name = "enable",
64146db7
AG		 1394 .ca_mode = S_IRUGO | S_IWUSR },
1395 .show = target_core_show_dev_enable,
c66ac9db
NB		 1396 .store = target_core_store_dev_enable,
1397};
1398
1399static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1400{
0fd97ccf 1401 struct se_device *dev = p;
c66ac9db
NB		 1402 struct config_item *lu_ci;
1403 struct t10_alua_lu_gp *lu_gp;
1404 struct t10_alua_lu_gp_member *lu_gp_mem;
1405 ssize_t len = 0;
1406
c66ac9db 1407 lu_gp_mem = dev->dev_alua_lu_gp_mem;
c87fbd56
CH		 1408 if (!lu_gp_mem)
1409 return 0;
c66ac9db
NB		 1410
1411 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1412 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1413 if (lu_gp) {
c66ac9db
NB		 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);
1417 }
1418 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1419
1420 return len;
1421}
1422
1423static ssize_t target_core_store_alua_lu_gp(
1424 void *p,
1425 const char *page,
1426 size_t count)
1427{
0fd97ccf
CH		 1428 struct se_device *dev = p;
1429 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 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];
1433 int move = 0;
1434
c87fbd56
CH		 1435 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1436 if (!lu_gp_mem)
1437 return 0;
1438
c66ac9db 1439 if (count > LU_GROUP_NAME_BUF) {
6708bb27 1440 pr_err("ALUA LU Group Alias too large!\n");
c66ac9db
NB		 1441 return -EINVAL;
1442 }
1443 memset(buf, 0, LU_GROUP_NAME_BUF);
1444 memcpy(buf, page, count);
1445 /*
1446 * Any ALUA logical unit alias besides "NULL" means we will be
1447 * making a new group association.
1448 */
1449 if (strcmp(strstrip(buf), "NULL")) {
1450 /*
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().
1454 */
1455 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
6708bb27 1456 if (!lu_gp_new)
c66ac9db
NB		 1457 return -ENODEV;
1458 }
c66ac9db
NB		 1459
1460 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1461 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1462 if (lu_gp) {
c66ac9db
NB		 1463 /*
1464 * Clearing an existing lu_gp association, and replacing
1465 * with NULL
1466 */
6708bb27
AG		 1467 if (!lu_gp_new) {
1468 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
c66ac9db
NB		 1469 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1470 " %hu\n",
1471 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1472 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 1473 config_item_name(&lu_gp->lu_gp_group.cg_item),
1474 lu_gp->lu_gp_id);
1475
1476 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1477 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1478
1479 return count;
1480 }
1481 /*
1482 * Removing existing association of lu_gp_mem with lu_gp
1483 */
1484 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1485 move = 1;
1486 }
1487 /*
1488 * Associate lu_gp_mem with lu_gp_new.
1489 */
1490 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1491 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1492
6708bb27 1493 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
c66ac9db
NB		 1494 " core/alua/lu_gps/%s, ID: %hu\n",
1495 (move) ? "Moving" : "Adding",
1496 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1497 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 1498 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1499 lu_gp_new->lu_gp_id);
1500
1501 core_alua_put_lu_gp_from_name(lu_gp_new);
1502 return count;
1503}
1504
1505static 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,
1511};
1512
229d4f11
HR		 1513static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1514{
1515 struct se_device *dev = p;
1516 struct t10_alua_lba_map *map;
1517 struct t10_alua_lba_map_member *mem;
1518 char *b = page;
1519 int bl = 0;
1520 char state;
1521
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,
1531 lba_map_mem_list) {
1532 switch (mem->lba_map_mem_alua_state) {
1533 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1534 state = 'O';
1535 break;
1536 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1537 state = 'A';
1538 break;
1539 case ALUA_ACCESS_STATE_STANDBY:
1540 state = 'S';
1541 break;
1542 case ALUA_ACCESS_STATE_UNAVAILABLE:
1543 state = 'U';
1544 break;
1545 default:
1546 state = '.';
1547 break;
1548 }
1549 bl += sprintf(b + bl, " %d:%c",
1550 mem->lba_map_mem_alua_pg_id, state);
1551 }
1552 bl += sprintf(b + bl, "\n");
1553 }
1554 spin_unlock(&dev->t10_alua.lba_map_lock);
1555 return bl;
1556}
1557
1558static ssize_t target_core_store_dev_lba_map(
1559 void *p,
1560 const char *page,
1561 size_t count)
1562{
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;
1567 char state;
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;
1572
1573 map_entries = kstrdup(page, GFP_KERNEL);
1574 if (!map_entries)
1575 return -ENOMEM;
1576
1577 INIT_LIST_HEAD(&lba_list);
1578 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1579 if (!*ptr)
1580 continue;
1581
1582 if (num == 0) {
1583 if (sscanf(ptr, "%lu %lu\n",
1584 &segment_size, &segment_mult) != 2) {
1585 pr_err("Invalid line %d\n", num);
1586 ret = -EINVAL;
1587 break;
1588 }
1589 num++;
1590 continue;
1591 }
1592 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1593 pr_err("Invalid line %d\n", num);
1594 ret = -EINVAL;
1595 break;
1596 }
1597 ptr = strchr(ptr, ' ');
1598 if (!ptr) {
1599 pr_err("Invalid line %d, missing end lba\n", num);
1600 ret = -EINVAL;
1601 break;
1602 }
1603 ptr++;
1604 ptr = strchr(ptr, ' ');
1605 if (!ptr) {
1606 pr_err("Invalid line %d, missing state definitions\n",
1607 num);
1608 ret = -EINVAL;
1609 break;
1610 }
1611 ptr++;
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);
1616 break;
1617 }
1618 pg = 0;
1619 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1620 switch (state) {
1621 case 'O':
1622 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1623 break;
1624 case 'A':
1625 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1626 break;
1627 case 'S':
1628 alua_state = ALUA_ACCESS_STATE_STANDBY;
1629 break;
1630 case 'U':
1631 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1632 break;
1633 default:
1634 pr_err("Invalid ALUA state '%c'\n", state);
1635 ret = -EINVAL;
1636 goto out;
1637 }
1638
1639 ret = core_alua_allocate_lba_map_mem(lba_map,
1640 pg_id, alua_state);
1641 if (ret) {
1642 pr_err("Invalid target descriptor %d:%c "
1643 "at line %d\n",
1644 pg_id, state, num);
1645 break;
1646 }
1647 pg++;
1648 ptr = strchr(ptr, ' ');
1649 if (ptr)
1650 ptr++;
1651 else
1652 break;
1653 }
1654 if (pg_num == -1)
1655 pg_num = pg;
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);
1659 ret = -EINVAL;
1660 break;
1661 }
1662 num++;
1663 }
1664out:
1665 if (ret) {
1666 core_alua_free_lba_map(&lba_list);
1667 count = ret;
1668 } else
1669 core_alua_set_lba_map(dev, &lba_list,
1670 segment_size, segment_mult);
1671 kfree(map_entries);
1672 return count;
1673}
1674
1675static 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,
1681};
1682
73112edc 1683static struct configfs_attribute *target_core_dev_attrs[] = {
c66ac9db
NB		 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,
229d4f11 1690 &target_core_attr_dev_lba_map.attr,
c66ac9db
NB		 1691 NULL,
1692};
1693
1694static void target_core_dev_release(struct config_item *item)
1695{
0fd97ccf
CH		 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);
c66ac9db 1699
c66ac9db 1700 kfree(dev_cg->default_groups);
0fd97ccf 1701 target_free_device(dev);
c66ac9db
NB		 1702}
1703
1704static ssize_t target_core_dev_show(struct config_item *item,
1705 struct configfs_attribute *attr,
1706 char *page)
1707{
0fd97ccf
CH		 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);
c66ac9db
NB		 1711 struct target_core_configfs_attribute *tc_attr = container_of(
1712 attr, struct target_core_configfs_attribute, attr);
1713
6708bb27 1714 if (!tc_attr->show)
c66ac9db
NB		 1715 return -EINVAL;
1716
0fd97ccf 1717 return tc_attr->show(dev, page);
c66ac9db
NB		 1718}
1719
1720static ssize_t target_core_dev_store(struct config_item *item,
1721 struct configfs_attribute *attr,
1722 const char *page, size_t count)
1723{
0fd97ccf
CH		 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);
c66ac9db
NB		 1727 struct target_core_configfs_attribute *tc_attr = container_of(
1728 attr, struct target_core_configfs_attribute, attr);
1729
6708bb27 1730 if (!tc_attr->store)
c66ac9db
NB		 1731 return -EINVAL;
1732
0fd97ccf 1733 return tc_attr->store(dev, page, count);
c66ac9db
NB		 1734}
1735
1736static 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,
1740};
1741
73112edc 1742TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
c66ac9db 1743
73112edc 1744/* End functions for struct config_item_type tb_dev_cit */
c66ac9db
NB		 1745
1746/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1747
1748CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1749#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1750static 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);
1755
1756#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1757static 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);
1761
1762/*
1763 * lu_gp_id
1764 */
1765static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1766 struct t10_alua_lu_gp *lu_gp,
1767 char *page)
1768{
6708bb27 1769 if (!lu_gp->lu_gp_valid_id)
c66ac9db
NB		 1770 return 0;
1771
1772 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1773}
1774
1775static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1776 struct t10_alua_lu_gp *lu_gp,
1777 const char *page,
1778 size_t count)
1779{
1780 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1781 unsigned long lu_gp_id;
1782 int ret;
1783
57103d7f 1784 ret = kstrtoul(page, 0, &lu_gp_id);
c66ac9db 1785 if (ret < 0) {
57103d7f 1786 pr_err("kstrtoul() returned %d for"
c66ac9db 1787 " lu_gp_id\n", ret);
57103d7f 1788 return ret;
c66ac9db
NB		 1789 }
1790 if (lu_gp_id > 0x0000ffff) {
6708bb27 1791 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 1792 " 0x0000ffff\n", lu_gp_id);
1793 return -EINVAL;
1794 }
1795
1796 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1797 if (ret < 0)
1798 return -EINVAL;
1799
6708bb27 1800 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
c66ac9db
NB		 1801 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1802 config_item_name(&alua_lu_gp_cg->cg_item),
1803 lu_gp->lu_gp_id);
1804
1805 return count;
1806}
1807
1808SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1809
1810/*
1811 * members
1812 */
1813static ssize_t target_core_alua_lu_gp_show_attr_members(
1814 struct t10_alua_lu_gp *lu_gp,
1815 char *page)
1816{
1817 struct se_device *dev;
1818 struct se_hba *hba;
c66ac9db
NB		 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];
1822
1823 memset(buf, 0, LU_GROUP_NAME_BUF);
1824
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;
0fd97ccf 1828 hba = dev->se_hba;
c66ac9db
NB		 1829
1830 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1831 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1832 config_item_name(&dev->dev_group.cg_item));
c66ac9db
NB		 1833 cur_len++; /* Extra byte for NULL terminator */
1834
1835 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 1836 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 1837 "_members buffer\n");
1838 break;
1839 }
1840 memcpy(page+len, buf, cur_len);
1841 len += cur_len;
1842 }
1843 spin_unlock(&lu_gp->lu_gp_lock);
1844
1845 return len;
1846}
1847
1848SE_DEV_ALUA_LU_ATTR_RO(members);
1849
1850CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1851
1852static 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,
1855 NULL,
1856};
1857
1f6fe7cb
NB		 1858static void target_core_alua_lu_gp_release(struct config_item *item)
1859{
1860 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1861 struct t10_alua_lu_gp, lu_gp_group);
1862
1863 core_alua_free_lu_gp(lu_gp);
1864}
1865
c66ac9db 1866static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1f6fe7cb 1867 .release = target_core_alua_lu_gp_release,
c66ac9db
NB		 1868 .show_attribute = target_core_alua_lu_gp_attr_show,
1869 .store_attribute = target_core_alua_lu_gp_attr_store,
1870};
1871
1872static 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,
1876};
1877
1878/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1879
1880/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1881
1882static struct config_group *target_core_alua_create_lu_gp(
1883 struct config_group *group,
1884 const char *name)
1885{
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;
1889
1890 lu_gp = core_alua_allocate_lu_gp(name, 0);
1891 if (IS_ERR(lu_gp))
1892 return NULL;
1893
1894 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1895 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1896
1897 config_group_init_type_name(alua_lu_gp_cg, name,
1898 &target_core_alua_lu_gp_cit);
1899
6708bb27 1900 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
c66ac9db
NB		 1901 " Group: core/alua/lu_gps/%s\n",
1902 config_item_name(alua_lu_gp_ci));
1903
1904 return alua_lu_gp_cg;
1905
1906}
1907
1908static void target_core_alua_drop_lu_gp(
1909 struct config_group *group,
1910 struct config_item *item)
1911{
1912 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1913 struct t10_alua_lu_gp, lu_gp_group);
1914
6708bb27 1915 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
c66ac9db
NB		 1916 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1917 config_item_name(item), lu_gp->lu_gp_id);
1f6fe7cb
NB		 1918 /*
1919 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1920 * -> target_core_alua_lu_gp_release()
1921 */
c66ac9db 1922 config_item_put(item);
c66ac9db
NB		 1923}
1924
1925static 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,
1928};
1929
1930static 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,
1934};
1935
1936/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1937
1938/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1939
1940CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1941#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
1942static 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);
1947
1948#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
1949static 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);
1953
1954/*
1955 * alua_access_state
1956 */
1957static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
1958 struct t10_alua_tg_pt_gp *tg_pt_gp,
1959 char *page)
1960{
1961 return sprintf(page, "%d\n",
1962 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
1963}
1964
1965static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
1966 struct t10_alua_tg_pt_gp *tg_pt_gp,
1967 const char *page,
1968 size_t count)
1969{
0fd97ccf 1970 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
c66ac9db
NB		 1971 unsigned long tmp;
1972 int new_state, ret;
1973
6708bb27 1974 if (!tg_pt_gp->tg_pt_gp_valid_id) {
125d0119 1975 pr_err("Unable to do implicit ALUA on non valid"
c66ac9db
NB		 1976 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
1977 return -EINVAL;
1978 }
f1453773
NB		 1979 if (!(dev->dev_flags & DF_CONFIGURED)) {
1980 pr_err("Unable to set alua_access_state while device is"
1981 " not configured\n");
1982 return -ENODEV;
1983 }
c66ac9db 1984
57103d7f 1985 ret = kstrtoul(page, 0, &tmp);
c66ac9db 1986 if (ret < 0) {
6708bb27 1987 pr_err("Unable to extract new ALUA access state from"
c66ac9db 1988 " %s\n", page);
57103d7f 1989 return ret;
c66ac9db
NB		 1990 }
1991 new_state = (int)tmp;
1992
125d0119
HR		 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");
c66ac9db
NB		 1996 return -EINVAL;
1997 }
c66094bf
HR		 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");
2003 return -EINVAL;
2004 }
c66ac9db 2005
0fd97ccf 2006 ret = core_alua_do_port_transition(tg_pt_gp, dev,
c66ac9db
NB		 2007 NULL, NULL, new_state, 0);
2008 return (!ret) ? count : -EINVAL;
2009}
2010
2011SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2012
2013/*
2014 * alua_access_status
2015 */
2016static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2017 struct t10_alua_tg_pt_gp *tg_pt_gp,
2018 char *page)
2019{
2020 return sprintf(page, "%s\n",
2021 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2022}
2023
2024static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2025 struct t10_alua_tg_pt_gp *tg_pt_gp,
2026 const char *page,
2027 size_t count)
2028{
2029 unsigned long tmp;
2030 int new_status, ret;
2031
6708bb27
AG		 2032 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2033 pr_err("Unable to do set ALUA access status on non"
c66ac9db
NB		 2034 " valid tg_pt_gp ID: %hu\n",
2035 tg_pt_gp->tg_pt_gp_valid_id);
2036 return -EINVAL;
2037 }
2038
57103d7f 2039 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2040 if (ret < 0) {
6708bb27 2041 pr_err("Unable to extract new ALUA access status"
c66ac9db 2042 " from %s\n", page);
57103d7f 2043 return ret;
c66ac9db
NB		 2044 }
2045 new_status = (int)tmp;
2046
2047 if ((new_status != ALUA_STATUS_NONE) &&
125d0119
HR		 2048 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2049 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
6708bb27 2050 pr_err("Illegal ALUA access status: 0x%02x\n",
c66ac9db
NB		 2051 new_status);
2052 return -EINVAL;
2053 }
2054
2055 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2056 return count;
2057}
2058
2059SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2060
2061/*
2062 * alua_access_type
2063 */
2064static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2065 struct t10_alua_tg_pt_gp *tg_pt_gp,
2066 char *page)
2067{
2068 return core_alua_show_access_type(tg_pt_gp, page);
2069}
2070
2071static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2072 struct t10_alua_tg_pt_gp *tg_pt_gp,
2073 const char *page,
2074 size_t count)
2075{
2076 return core_alua_store_access_type(tg_pt_gp, page, count);
2077}
2078
2079SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2080
6be526c4
HR		 2081/*
2082 * alua_supported_states
2083 */
6be526c4 2084
b0a382c5
HR		 2085#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2086static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2087 struct t10_alua_tg_pt_gp *t, char *p) \
2088{ \
2089 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
6be526c4
HR		 2090}
2091
b0a382c5
HR		 2092#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2093static 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) \
2095{ \
2096 unsigned long tmp; \
2097 int ret; \
2098 \
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); \
2103 return -EINVAL; \
2104 } \
2105 \
2106 ret = kstrtoul(p, 0, &tmp); \
2107 if (ret < 0) { \
2108 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2109 return -EINVAL; \
2110 } \
2111 if (tmp > 1) { \
2112 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2113 return -EINVAL; \
2114 } \
1f0b030c 2115 if (tmp) \
b0a382c5
HR		 2116 t->_var |= _bit; \
2117 else \
2118 t->_var &= ~_bit; \
2119 \
2120 return c; \
2121}
2122
2123SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2124 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2125SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2126 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2127SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2128
2129SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2130 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2131SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2132 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2133SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2134
2135SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2136 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2137SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2138 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
c66094bf 2139SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
b0a382c5
HR		 2140
2141SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2142 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2143SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2144 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2145SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2146
2147SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2148 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2149SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2150 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2151SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2152
2153SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2154 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2155SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2156 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2157SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2158
2159SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2160 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2161SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2162 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2163SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
6be526c4 2164
c66ac9db
NB		 2165/*
2166 * alua_write_metadata
2167 */
2168static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2169 struct t10_alua_tg_pt_gp *tg_pt_gp,
2170 char *page)
2171{
2172 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2173}
2174
2175static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2176 struct t10_alua_tg_pt_gp *tg_pt_gp,
2177 const char *page,
2178 size_t count)
2179{
2180 unsigned long tmp;
2181 int ret;
2182
57103d7f 2183 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2184 if (ret < 0) {
6708bb27 2185 pr_err("Unable to extract alua_write_metadata\n");
57103d7f 2186 return ret;
c66ac9db
NB		 2187 }
2188
2189 if ((tmp != 0) && (tmp != 1)) {
6708bb27 2190 pr_err("Illegal value for alua_write_metadata:"
c66ac9db
NB		 2191 " %lu\n", tmp);
2192 return -EINVAL;
2193 }
2194 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2195
2196 return count;
2197}
2198
2199SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2200
2201
2202
2203/*
2204 * nonop_delay_msecs
2205 */
2206static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2207 struct t10_alua_tg_pt_gp *tg_pt_gp,
2208 char *page)
2209{
2210 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2211
2212}
2213
2214static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2215 struct t10_alua_tg_pt_gp *tg_pt_gp,
2216 const char *page,
2217 size_t count)
2218{
2219 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2220}
2221
2222SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2223
2224/*
2225 * trans_delay_msecs
2226 */
2227static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2228 struct t10_alua_tg_pt_gp *tg_pt_gp,
2229 char *page)
2230{
2231 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2232}
2233
2234static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2235 struct t10_alua_tg_pt_gp *tg_pt_gp,
2236 const char *page,
2237 size_t count)
2238{
2239 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2240}
2241
2242SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2243
5b9a4d72 2244/*
125d0119 2245 * implicit_trans_secs
5b9a4d72 2246 */
125d0119 2247static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
5b9a4d72
NB		 2248 struct t10_alua_tg_pt_gp *tg_pt_gp,
2249 char *page)
2250{
125d0119 2251 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
5b9a4d72
NB		 2252}
2253
125d0119 2254static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
5b9a4d72
NB		 2255 struct t10_alua_tg_pt_gp *tg_pt_gp,
2256 const char *page,
2257 size_t count)
2258{
125d0119 2259 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
5b9a4d72
NB		 2260}
2261
125d0119 2262SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
5b9a4d72 2263
c66ac9db
NB		 2264/*
2265 * preferred
2266 */
2267
2268static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2269 struct t10_alua_tg_pt_gp *tg_pt_gp,
2270 char *page)
2271{
2272 return core_alua_show_preferred_bit(tg_pt_gp, page);
2273}
2274
2275static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2276 struct t10_alua_tg_pt_gp *tg_pt_gp,
2277 const char *page,
2278 size_t count)
2279{
2280 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2281}
2282
2283SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2284
2285/*
2286 * tg_pt_gp_id
2287 */
2288static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2289 struct t10_alua_tg_pt_gp *tg_pt_gp,
2290 char *page)
2291{
6708bb27 2292 if (!tg_pt_gp->tg_pt_gp_valid_id)
c66ac9db
NB		 2293 return 0;
2294
2295 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2296}
2297
2298static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2299 struct t10_alua_tg_pt_gp *tg_pt_gp,
2300 const char *page,
2301 size_t count)
2302{
2303 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2304 unsigned long tg_pt_gp_id;
2305 int ret;
2306
57103d7f 2307 ret = kstrtoul(page, 0, &tg_pt_gp_id);
c66ac9db 2308 if (ret < 0) {
57103d7f 2309 pr_err("kstrtoul() returned %d for"
c66ac9db 2310 " tg_pt_gp_id\n", ret);
57103d7f 2311 return ret;
c66ac9db
NB		 2312 }
2313 if (tg_pt_gp_id > 0x0000ffff) {
6708bb27 2314 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2315 " 0x0000ffff\n", tg_pt_gp_id);
2316 return -EINVAL;
2317 }
2318
2319 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2320 if (ret < 0)
2321 return -EINVAL;
2322
6708bb27 2323 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
c66ac9db
NB		 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);
2327
2328 return count;
2329}
2330
2331SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2332
2333/*
2334 * members
2335 */
2336static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2337 struct t10_alua_tg_pt_gp *tg_pt_gp,
2338 char *page)
2339{
2340 struct se_port *port;
2341 struct se_portal_group *tpg;
2342 struct se_lun *lun;
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];
2346
2347 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2348
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;
2355
2356 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
e3d6f909
AG		 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),
c66ac9db
NB		 2360 config_item_name(&lun->lun_group.cg_item));
2361 cur_len++; /* Extra byte for NULL terminator */
2362
2363 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2364 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2365 "_members buffer\n");
2366 break;
2367 }
2368 memcpy(page+len, buf, cur_len);
2369 len += cur_len;
2370 }
2371 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2372
2373 return len;
2374}
2375
2376SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2377
2378CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2379 tg_pt_gp_group);
2380
2381static 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,
b0a382c5
HR		 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,
c66ac9db
NB		 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,
125d0119 2395 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
c66ac9db
NB		 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,
2399 NULL,
2400};
2401
1f6fe7cb
NB		 2402static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2403{
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);
2406
2407 core_alua_free_tg_pt_gp(tg_pt_gp);
2408}
2409
c66ac9db 2410static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
1f6fe7cb 2411 .release = target_core_alua_tg_pt_gp_release,
c66ac9db
NB		 2412 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2413 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2414};
2415
2416static 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,
2420};
2421
2422/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2423
72aca57b 2424/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
c66ac9db
NB		 2425
2426static struct config_group *target_core_alua_create_tg_pt_gp(
2427 struct config_group *group,
2428 const char *name)
2429{
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;
c66ac9db
NB		 2433 struct config_group *alua_tg_pt_gp_cg = NULL;
2434 struct config_item *alua_tg_pt_gp_ci = NULL;
2435
0fd97ccf 2436 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
6708bb27 2437 if (!tg_pt_gp)
c66ac9db
NB		 2438 return NULL;
2439
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;
2442
2443 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2444 &target_core_alua_tg_pt_gp_cit);
2445
6708bb27 2446 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
c66ac9db
NB		 2447 " Group: alua/tg_pt_gps/%s\n",
2448 config_item_name(alua_tg_pt_gp_ci));
2449
2450 return alua_tg_pt_gp_cg;
2451}
2452
2453static void target_core_alua_drop_tg_pt_gp(
2454 struct config_group *group,
2455 struct config_item *item)
2456{
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);
2459
6708bb27 2460 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
c66ac9db
NB		 2461 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2462 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
1f6fe7cb
NB		 2463 /*
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().
2466 */
c66ac9db 2467 config_item_put(item);
c66ac9db
NB		 2468}
2469
2470static 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,
2473};
2474
72aca57b 2475TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
c66ac9db 2476
72aca57b 2477/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
c66ac9db
NB		 2478
2479/* Start functions for struct config_item_type target_core_alua_cit */
2480
2481/*
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.
2486 */
2487static struct config_item_type target_core_alua_cit = {
2488 .ct_item_ops = NULL,
2489 .ct_attrs = NULL,
2490 .ct_owner = THIS_MODULE,
2491};
2492
2493/* End functions for struct config_item_type target_core_alua_cit */
2494
d23ab570 2495/* Start functions for struct config_item_type tb_dev_stat_cit */
12d23384
NB		 2496
2497static struct config_group *target_core_stat_mkdir(
2498 struct config_group *group,
2499 const char *name)
2500{
2501 return ERR_PTR(-ENOSYS);
2502}
2503
2504static void target_core_stat_rmdir(
2505 struct config_group *group,
2506 struct config_item *item)
2507{
2508 return;
2509}
2510
2511static struct configfs_group_operations target_core_stat_group_ops = {
2512 .make_group = &target_core_stat_mkdir,
2513 .drop_item = &target_core_stat_rmdir,
2514};
2515
d23ab570 2516TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
12d23384 2517
d23ab570 2518/* End functions for struct config_item_type tb_dev_stat_cit */
12d23384 2519
c66ac9db
NB		 2520/* Start functions for struct config_item_type target_core_hba_cit */
2521
2522static struct config_group *target_core_make_subdev(
2523 struct config_group *group,
2524 const char *name)
2525{
2526 struct t10_alua_tg_pt_gp *tg_pt_gp;
c66ac9db
NB		 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);
0fd97ccf 2530 struct se_device *dev;
c66ac9db 2531 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
12d23384
NB		 2532 struct config_group *dev_stat_grp = NULL;
2533 int errno = -ENOMEM, ret;
c66ac9db 2534
12d23384
NB		 2535 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2536 if (ret)
2537 return ERR_PTR(ret);
c66ac9db
NB		 2538 /*
2539 * Locate the struct se_subsystem_api from parent's struct se_hba.
2540 */
2541 t = hba->transport;
2542
0fd97ccf
CH		 2543 dev = target_alloc_device(hba, name);
2544 if (!dev)
2545 goto out_unlock;
2546
2547 dev_cg = &dev->dev_group;
c66ac9db 2548
13f6a914 2549 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
c66ac9db 2550 GFP_KERNEL);
6708bb27 2551 if (!dev_cg->default_groups)
0fd97ccf 2552 goto out_free_device;
c66ac9db 2553
73112edc 2554 config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
0fd97ccf 2555 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
f79a897e 2556 &t->tb_cits.tb_dev_attrib_cit);
0fd97ccf 2557 config_group_init_type_name(&dev->dev_pr_group, "pr",
91e2e39b 2558 &t->tb_cits.tb_dev_pr_cit);
0fd97ccf 2559 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
f8d389c6 2560 &t->tb_cits.tb_dev_wwn_cit);
0fd97ccf 2561 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
72aca57b 2562 "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
0fd97ccf 2563 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
d23ab570 2564 "statistics", &t->tb_cits.tb_dev_stat_cit);
12d23384 2565
0fd97ccf
CH		 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;
12d23384 2571 dev_cg->default_groups[5] = NULL;
c66ac9db 2572 /*
12d23384 2573 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
c66ac9db 2574 */
0fd97ccf 2575 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
6708bb27 2576 if (!tg_pt_gp)
0fd97ccf
CH		 2577 goto out_free_dev_cg_default_groups;
2578 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
c66ac9db 2579
0fd97ccf 2580 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
13f6a914 2581 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2582 GFP_KERNEL);
6708bb27
AG		 2583 if (!tg_pt_gp_cg->default_groups) {
2584 pr_err("Unable to allocate tg_pt_gp_cg->"
c66ac9db 2585 "default_groups\n");
0fd97ccf 2586 goto out_free_tg_pt_gp;
c66ac9db
NB		 2587 }
2588
2589 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2590 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2591 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2592 tg_pt_gp_cg->default_groups[1] = NULL;
12d23384
NB		 2593 /*
2594 * Add core/$HBA/$DEV/statistics/ default groups
2595 */
0fd97ccf 2596 dev_stat_grp = &dev->dev_stat_grps.stat_group;
13f6a914 2597 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
12d23384
NB		 2598 GFP_KERNEL);
2599 if (!dev_stat_grp->default_groups) {
6708bb27 2600 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
0fd97ccf 2601 goto out_free_tg_pt_gp_cg_default_groups;
12d23384 2602 }
0fd97ccf 2603 target_stat_setup_dev_default_groups(dev);
c66ac9db
NB		 2604
2605 mutex_unlock(&hba->hba_access_mutex);
0fd97ccf
CH		 2606 return dev_cg;
2607
2608out_free_tg_pt_gp_cg_default_groups:
2609 kfree(tg_pt_gp_cg->default_groups);
2610out_free_tg_pt_gp:
2611 core_alua_free_tg_pt_gp(tg_pt_gp);
2612out_free_dev_cg_default_groups:
2613 kfree(dev_cg->default_groups);
2614out_free_device:
2615 target_free_device(dev);
2616out_unlock:
c66ac9db 2617 mutex_unlock(&hba->hba_access_mutex);
12d23384 2618 return ERR_PTR(errno);
c66ac9db
NB		 2619}
2620
2621static void target_core_drop_subdev(
2622 struct config_group *group,
2623 struct config_item *item)
2624{
0fd97ccf
CH		 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);
c66ac9db 2628 struct se_hba *hba;
c66ac9db 2629 struct config_item *df_item;
0fd97ccf 2630 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
1f6fe7cb 2631 int i;
c66ac9db 2632
0fd97ccf 2633 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
c66ac9db 2634
1f6fe7cb 2635 mutex_lock(&hba->hba_access_mutex);
c66ac9db 2636
0fd97ccf 2637 dev_stat_grp = &dev->dev_stat_grps.stat_group;
12d23384
NB		 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);
2642 }
2643 kfree(dev_stat_grp->default_groups);
2644
0fd97ccf 2645 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 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);
2650 }
2651 kfree(tg_pt_gp_cg->default_groups);
1f6fe7cb
NB		 2652 /*
2653 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2654 * directly from target_core_alua_tg_pt_gp_release().
2655 */
0fd97ccf 2656 dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db 2657
c66ac9db
NB		 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);
2662 }
c66ac9db 2663 /*
0fd97ccf 2664 * se_dev is released from target_core_dev_item_ops->release()
c66ac9db 2665 */
1f6fe7cb 2666 config_item_put(item);
c66ac9db 2667 mutex_unlock(&hba->hba_access_mutex);
c66ac9db
NB		 2668}
2669
2670static struct configfs_group_operations target_core_hba_group_ops = {
2671 .make_group = target_core_make_subdev,
2672 .drop_item = target_core_drop_subdev,
2673};
2674
2675CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2676#define SE_HBA_ATTR(_name, _mode) \
2677static 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);
2682
2683#define SE_HBA_ATTR_RO(_name) \
2684static struct target_core_hba_attribute \
2685 target_core_hba_##_name = \
2686 __CONFIGFS_EATTR_RO(_name, \
2687 target_core_hba_show_attr_##_name);
2688
2689static ssize_t target_core_hba_show_attr_hba_info(
2690 struct se_hba *hba,
2691 char *page)
2692{
2693 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2694 hba->hba_id, hba->transport->name,
2695 TARGET_CORE_CONFIGFS_VERSION);
2696}
2697
2698SE_HBA_ATTR_RO(hba_info);
2699
2700static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2701 char *page)
2702{
2703 int hba_mode = 0;
2704
2705 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2706 hba_mode = 1;
2707
2708 return sprintf(page, "%d\n", hba_mode);
2709}
2710
2711static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2712 const char *page, size_t count)
2713{
2714 struct se_subsystem_api *transport = hba->transport;
2715 unsigned long mode_flag;
2716 int ret;
2717
2718 if (transport->pmode_enable_hba == NULL)
2719 return -EINVAL;
2720
57103d7f 2721 ret = kstrtoul(page, 0, &mode_flag);
c66ac9db 2722 if (ret < 0) {
6708bb27 2723 pr_err("Unable to extract hba mode flag: %d\n", ret);
57103d7f 2724 return ret;
c66ac9db
NB		 2725 }
2726
0fd97ccf 2727 if (hba->dev_count) {
6708bb27 2728 pr_err("Unable to set hba_mode with active devices\n");
c66ac9db
NB		 2729 return -EINVAL;
2730 }
c66ac9db
NB		 2731
2732 ret = transport->pmode_enable_hba(hba, mode_flag);
2733 if (ret < 0)
2734 return -EINVAL;
2735 if (ret > 0)
2736 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2737 else if (ret == 0)
2738 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2739
2740 return count;
2741}
2742
2743SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2744
2745CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2746
1f6fe7cb
NB		 2747static void target_core_hba_release(struct config_item *item)
2748{
2749 struct se_hba *hba = container_of(to_config_group(item),
2750 struct se_hba, hba_group);
2751 core_delete_hba(hba);
2752}
2753
c66ac9db
NB		 2754static struct configfs_attribute *target_core_hba_attrs[] = {
2755 &target_core_hba_hba_info.attr,
2756 &target_core_hba_hba_mode.attr,
2757 NULL,
2758};
2759
2760static struct configfs_item_operations target_core_hba_item_ops = {
1f6fe7cb 2761 .release = target_core_hba_release,
c66ac9db
NB		 2762 .show_attribute = target_core_hba_attr_show,
2763 .store_attribute = target_core_hba_attr_store,
2764};
2765
2766static 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,
2771};
2772
2773static struct config_group *target_core_call_addhbatotarget(
2774 struct config_group *group,
2775 const char *name)
2776{
2777 char *se_plugin_str, *str, *str2;
2778 struct se_hba *hba;
2779 char buf[TARGET_CORE_NAME_MAX_LEN];
2780 unsigned long plugin_dep_id = 0;
2781 int ret;
2782
2783 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
60d645a4 2784 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
6708bb27 2785 pr_err("Passed *name strlen(): %d exceeds"
c66ac9db
NB		 2786 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2787 TARGET_CORE_NAME_MAX_LEN);
2788 return ERR_PTR(-ENAMETOOLONG);
2789 }
2790 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2791
2792 str = strstr(buf, "_");
6708bb27
AG		 2793 if (!str) {
2794 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
c66ac9db
NB		 2795 return ERR_PTR(-EINVAL);
2796 }
2797 se_plugin_str = buf;
2798 /*
2799 * Special case for subsystem plugins that have "_" in their names.
2800 * Namely rd_direct and rd_mcp..
2801 */
2802 str2 = strstr(str+1, "_");
6708bb27 2803 if (str2) {
c66ac9db
NB		 2804 *str2 = '\0'; /* Terminate for *se_plugin_str */
2805 str2++; /* Skip to start of plugin dependent ID */
2806 str = str2;
2807 } else {
2808 *str = '\0'; /* Terminate for *se_plugin_str */
2809 str++; /* Skip to start of plugin dependent ID */
2810 }
2811
57103d7f 2812 ret = kstrtoul(str, 0, &plugin_dep_id);
c66ac9db 2813 if (ret < 0) {
57103d7f 2814 pr_err("kstrtoul() returned %d for"
c66ac9db 2815 " plugin_dep_id\n", ret);
57103d7f 2816 return ERR_PTR(ret);
c66ac9db
NB		 2817 }
2818 /*
2819 * Load up TCM subsystem plugins if they have not already been loaded.
2820 */
dbc5623e 2821 transport_subsystem_check_init();
c66ac9db
NB		 2822
2823 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2824 if (IS_ERR(hba))
2825 return ERR_CAST(hba);
2826
2827 config_group_init_type_name(&hba->hba_group, name,
2828 &target_core_hba_cit);
2829
2830 return &hba->hba_group;
2831}
2832
2833static void target_core_call_delhbafromtarget(
2834 struct config_group *group,
2835 struct config_item *item)
2836{
1f6fe7cb
NB		 2837 /*
2838 * core_delete_hba() is called from target_core_hba_item_ops->release()
2839 * -> target_core_hba_release()
2840 */
c66ac9db 2841 config_item_put(item);
c66ac9db
NB		 2842}
2843
2844static struct configfs_group_operations target_core_group_ops = {
2845 .make_group = target_core_call_addhbatotarget,
2846 .drop_item = target_core_call_delhbafromtarget,
2847};
2848
2849static struct config_item_type target_core_cit = {
2850 .ct_item_ops = NULL,
2851 .ct_group_ops = &target_core_group_ops,
2852 .ct_attrs = NULL,
2853 .ct_owner = THIS_MODULE,
2854};
2855
2856/* Stop functions for struct config_item_type target_core_hba_cit */
2857
73112edc
NB		 2858void target_core_setup_sub_cits(struct se_subsystem_api *sa)
2859{
2860 target_core_setup_dev_cit(sa);
f79a897e 2861 target_core_setup_dev_attrib_cit(sa);
91e2e39b 2862 target_core_setup_dev_pr_cit(sa);
f8d389c6 2863 target_core_setup_dev_wwn_cit(sa);
72aca57b 2864 target_core_setup_dev_alua_tg_pt_gps_cit(sa);
d23ab570 2865 target_core_setup_dev_stat_cit(sa);
73112edc
NB		 2866}
2867EXPORT_SYMBOL(target_core_setup_sub_cits);
2868
54550fab 2869static int __init target_core_init_configfs(void)
c66ac9db
NB		 2870{
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;
c66ac9db
NB		 2874 struct t10_alua_lu_gp *lu_gp;
2875 int ret;
2876
6708bb27 2877 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
c66ac9db
NB		 2878 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2879 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2880
2881 subsys = target_core_subsystem[0];
2882 config_group_init(&subsys->su_group);
2883 mutex_init(&subsys->su_mutex);
2884
e3d6f909 2885 ret = init_se_kmem_caches();
c66ac9db 2886 if (ret < 0)
e3d6f909 2887 return ret;
c66ac9db
NB		 2888 /*
2889 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2890 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2891 */
2892 target_cg = &subsys->su_group;
ab6dae82 2893 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2894 GFP_KERNEL);
6708bb27
AG		 2895 if (!target_cg->default_groups) {
2896 pr_err("Unable to allocate target_cg->default_groups\n");
37bb7899 2897 ret = -ENOMEM;
c66ac9db
NB		 2898 goto out_global;
2899 }
2900
e3d6f909 2901 config_group_init_type_name(&target_core_hbagroup,
c66ac9db 2902 "core", &target_core_cit);
e3d6f909 2903 target_cg->default_groups[0] = &target_core_hbagroup;
c66ac9db
NB		 2904 target_cg->default_groups[1] = NULL;
2905 /*
2906 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2907 */
e3d6f909 2908 hba_cg = &target_core_hbagroup;
13f6a914 2909 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2910 GFP_KERNEL);
6708bb27
AG		 2911 if (!hba_cg->default_groups) {
2912 pr_err("Unable to allocate hba_cg->default_groups\n");
37bb7899 2913 ret = -ENOMEM;
c66ac9db
NB		 2914 goto out_global;
2915 }
e3d6f909 2916 config_group_init_type_name(&alua_group,
c66ac9db 2917 "alua", &target_core_alua_cit);
e3d6f909 2918 hba_cg->default_groups[0] = &alua_group;
c66ac9db
NB		 2919 hba_cg->default_groups[1] = NULL;
2920 /*
2921 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2922 * groups under /sys/kernel/config/target/core/alua/
2923 */
e3d6f909 2924 alua_cg = &alua_group;
13f6a914 2925 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2926 GFP_KERNEL);
6708bb27
AG		 2927 if (!alua_cg->default_groups) {
2928 pr_err("Unable to allocate alua_cg->default_groups\n");
37bb7899 2929 ret = -ENOMEM;
c66ac9db
NB		 2930 goto out_global;
2931 }
2932
e3d6f909 2933 config_group_init_type_name(&alua_lu_gps_group,
c66ac9db 2934 "lu_gps", &target_core_alua_lu_gps_cit);
e3d6f909 2935 alua_cg->default_groups[0] = &alua_lu_gps_group;
c66ac9db
NB		 2936 alua_cg->default_groups[1] = NULL;
2937 /*
2938 * Add core/alua/lu_gps/default_lu_gp
2939 */
2940 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
37bb7899
PST		 2941 if (IS_ERR(lu_gp)) {
2942 ret = -ENOMEM;
c66ac9db 2943 goto out_global;
37bb7899 2944 }
c66ac9db 2945
e3d6f909 2946 lu_gp_cg = &alua_lu_gps_group;
13f6a914 2947 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2948 GFP_KERNEL);
6708bb27
AG		 2949 if (!lu_gp_cg->default_groups) {
2950 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
37bb7899 2951 ret = -ENOMEM;
c66ac9db
NB		 2952 goto out_global;
2953 }
2954
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;
e3d6f909 2959 default_lu_gp = lu_gp;
c66ac9db
NB		 2960 /*
2961 * Register the target_core_mod subsystem with configfs.
2962 */
2963 ret = configfs_register_subsystem(subsys);
2964 if (ret < 0) {
6708bb27 2965 pr_err("Error %d while registering subsystem %s\n",
c66ac9db
NB		 2966 ret, subsys->su_group.cg_item.ci_namebuf);
2967 goto out_global;
2968 }
6708bb27 2969 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
c66ac9db
NB		 2970 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2971 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2972 /*
2973 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2974 */
2975 ret = rd_module_init();
2976 if (ret < 0)
2977 goto out;
2978
0d0f9dfb
RD		 2979 ret = core_dev_setup_virtual_lun0();
2980 if (ret < 0)
c66ac9db
NB		 2981 goto out;
2982
f99715ac
NB		 2983 ret = target_xcopy_setup_pt();
2984 if (ret < 0)
2985 goto out;
2986
c66ac9db
NB		 2987 return 0;
2988
2989out:
2990 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 2991 core_dev_release_virtual_lun0();
2992 rd_module_exit();
2993out_global:
e3d6f909
AG		 2994 if (default_lu_gp) {
2995 core_alua_free_lu_gp(default_lu_gp);
2996 default_lu_gp = NULL;
c66ac9db
NB		 2997 }
2998 if (lu_gp_cg)
2999 kfree(lu_gp_cg->default_groups);
3000 if (alua_cg)
3001 kfree(alua_cg->default_groups);
3002 if (hba_cg)
3003 kfree(hba_cg->default_groups);
3004 kfree(target_cg->default_groups);
e3d6f909
AG		 3005 release_se_kmem_caches();
3006 return ret;
c66ac9db
NB		 3007}
3008
54550fab 3009static void __exit target_core_exit_configfs(void)
c66ac9db
NB		 3010{
3011 struct configfs_subsystem *subsys;
3012 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3013 struct config_item *item;
3014 int i;
3015
c66ac9db
NB		 3016 subsys = target_core_subsystem[0];
3017
e3d6f909 3018 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 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);
3023 }
3024 kfree(lu_gp_cg->default_groups);
7c2bf6e9 3025 lu_gp_cg->default_groups = NULL;
c66ac9db 3026
e3d6f909 3027 alua_cg = &alua_group;
c66ac9db
NB		 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);
3032 }
3033 kfree(alua_cg->default_groups);
7c2bf6e9 3034 alua_cg->default_groups = NULL;
c66ac9db 3035
e3d6f909 3036 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 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);
3041 }
3042 kfree(hba_cg->default_groups);
7c2bf6e9
NB		 3043 hba_cg->default_groups = NULL;
3044 /*
3045 * We expect subsys->su_group.default_groups to be released
3046 * by configfs subsystem provider logic..
3047 */
3048 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3049 kfree(subsys->su_group.default_groups);
3050
e3d6f909
AG		 3051 core_alua_free_lu_gp(default_lu_gp);
3052 default_lu_gp = NULL;
7c2bf6e9 3053
6708bb27 3054 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
c66ac9db
NB		 3055 " Infrastructure\n");
3056
c66ac9db
NB		 3057 core_dev_release_virtual_lun0();
3058 rd_module_exit();
f99715ac 3059 target_xcopy_release_pt();
e3d6f909 3060 release_se_kmem_caches();
c66ac9db
NB		 3061}
3062
3063MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3064MODULE_AUTHOR("nab@Linux-iSCSI.org");
3065MODULE_LICENSE("GPL");
3066
3067module_init(target_core_init_configfs);
3068module_exit(target_core_exit_configfs);
Linux 6.x block layer and io_uring tree(s)