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Merge tag 'sound-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
[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 43#include <target/target_core_fabric_configfs.h>
c66ac9db
NB		 44#include <target/configfs_macros.h>
45
e26d99ae 46#include "target_core_internal.h"
c66ac9db 47#include "target_core_alua.h"
c66ac9db
NB		 48#include "target_core_pr.h"
49#include "target_core_rd.h"
f99715ac 50#include "target_core_xcopy.h"
c66ac9db 51
73112edc 52#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
0a06d430 53static void target_core_setup_##_name##_cit(struct target_backend *tb) \
73112edc 54{ \
0a06d430 55 struct config_item_type *cit = &tb->tb_##_name##_cit; \
73112edc
NB		 56 \
57 cit->ct_item_ops = _item_ops; \
58 cit->ct_group_ops = _group_ops; \
59 cit->ct_attrs = _attrs; \
0a06d430
CH		 60 cit->ct_owner = tb->ops->owner; \
61 pr_debug("Setup generic %s\n", __stringify(_name)); \
62}
63
64#define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
65static void target_core_setup_##_name##_cit(struct target_backend *tb) \
66{ \
67 struct config_item_type *cit = &tb->tb_##_name##_cit; \
68 \
69 cit->ct_item_ops = _item_ops; \
70 cit->ct_group_ops = _group_ops; \
71 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
72 cit->ct_owner = tb->ops->owner; \
73112edc
NB		 73 pr_debug("Setup generic %s\n", __stringify(_name)); \
74}
75
e3d6f909
AG		 76extern struct t10_alua_lu_gp *default_lu_gp;
77
d0f474e5
RD		 78static LIST_HEAD(g_tf_list);
79static DEFINE_MUTEX(g_tf_lock);
c66ac9db
NB		 80
81struct target_core_configfs_attribute {
82 struct configfs_attribute attr;
83 ssize_t (*show)(void *, char *);
84 ssize_t (*store)(void *, const char *, size_t);
85};
86
e3d6f909
AG		 87static struct config_group target_core_hbagroup;
88static struct config_group alua_group;
89static struct config_group alua_lu_gps_group;
90
c66ac9db
NB		 91static inline struct se_hba *
92item_to_hba(struct config_item *item)
93{
94 return container_of(to_config_group(item), struct se_hba, hba_group);
95}
96
97/*
98 * Attributes for /sys/kernel/config/target/
99 */
100static ssize_t target_core_attr_show(struct config_item *item,
101 struct configfs_attribute *attr,
102 char *page)
103{
104 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
ce8dd25d 105 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
c66ac9db
NB		 106 utsname()->sysname, utsname()->machine);
107}
108
109static struct configfs_item_operations target_core_fabric_item_ops = {
110 .show_attribute = target_core_attr_show,
111};
112
113static struct configfs_attribute target_core_item_attr_version = {
114 .ca_owner = THIS_MODULE,
115 .ca_name = "version",
116 .ca_mode = S_IRUGO,
117};
118
119static struct target_fabric_configfs *target_core_get_fabric(
120 const char *name)
121{
122 struct target_fabric_configfs *tf;
123
6708bb27 124 if (!name)
c66ac9db
NB		 125 return NULL;
126
127 mutex_lock(&g_tf_lock);
128 list_for_each_entry(tf, &g_tf_list, tf_list) {
0dc2e8d1 129 if (!strcmp(tf->tf_ops->name, name)) {
c66ac9db
NB		 130 atomic_inc(&tf->tf_access_cnt);
131 mutex_unlock(&g_tf_lock);
132 return tf;
133 }
134 }
135 mutex_unlock(&g_tf_lock);
136
137 return NULL;
138}
139
140/*
141 * Called from struct target_core_group_ops->make_group()
142 */
143static struct config_group *target_core_register_fabric(
144 struct config_group *group,
145 const char *name)
146{
147 struct target_fabric_configfs *tf;
148 int ret;
149
6708bb27 150 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
c66ac9db 151 " %s\n", group, name);
e7b7af6e
RD		 152
153 tf = target_core_get_fabric(name);
154 if (!tf) {
62554910
NB		 155 pr_debug("target_core_register_fabric() trying autoload for %s\n",
156 name);
e7b7af6e 157
c66ac9db 158 /*
e7b7af6e
RD		 159 * Below are some hardcoded request_module() calls to automatically
160 * local fabric modules when the following is called:
c66ac9db 161 *
e7b7af6e 162 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
c66ac9db 163 *
e7b7af6e
RD		 164 * Note that this does not limit which TCM fabric module can be
165 * registered, but simply provids auto loading logic for modules with
166 * mkdir(2) system calls with known TCM fabric modules.
c66ac9db 167 */
e7b7af6e
RD		 168
169 if (!strncmp(name, "iscsi", 5)) {
170 /*
171 * Automatically load the LIO Target fabric module when the
172 * following is called:
173 *
174 * mkdir -p $CONFIGFS/target/iscsi
175 */
176 ret = request_module("iscsi_target_mod");
177 if (ret < 0) {
62554910
NB		 178 pr_debug("request_module() failed for"
179 " iscsi_target_mod.ko: %d\n", ret);
e7b7af6e
RD		 180 return ERR_PTR(-EINVAL);
181 }
182 } else if (!strncmp(name, "loopback", 8)) {
183 /*
184 * Automatically load the tcm_loop fabric module when the
185 * following is called:
186 *
187 * mkdir -p $CONFIGFS/target/loopback
188 */
189 ret = request_module("tcm_loop");
190 if (ret < 0) {
62554910
NB		 191 pr_debug("request_module() failed for"
192 " tcm_loop.ko: %d\n", ret);
e7b7af6e
RD		 193 return ERR_PTR(-EINVAL);
194 }
c66ac9db 195 }
e7b7af6e
RD		 196
197 tf = target_core_get_fabric(name);
c66ac9db
NB		 198 }
199
6708bb27 200 if (!tf) {
62554910
NB		 201 pr_debug("target_core_get_fabric() failed for %s\n",
202 name);
c66ac9db
NB		 203 return ERR_PTR(-EINVAL);
204 }
6708bb27 205 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
0dc2e8d1 206 " %s\n", tf->tf_ops->name);
c66ac9db
NB		 207 /*
208 * On a successful target_core_get_fabric() look, the returned
209 * struct target_fabric_configfs *tf will contain a usage reference.
210 */
6708bb27 211 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
968ebe75 212 &tf->tf_wwn_cit);
c66ac9db
NB		 213
214 tf->tf_group.default_groups = tf->tf_default_groups;
215 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
216 tf->tf_group.default_groups[1] = NULL;
217
968ebe75 218 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
c66ac9db 219 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
968ebe75 220 &tf->tf_discovery_cit);
c66ac9db 221
6708bb27 222 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
c66ac9db 223 " %s\n", tf->tf_group.cg_item.ci_name);
c66ac9db
NB		 224 return &tf->tf_group;
225}
226
227/*
228 * Called from struct target_core_group_ops->drop_item()
229 */
230static void target_core_deregister_fabric(
231 struct config_group *group,
232 struct config_item *item)
233{
234 struct target_fabric_configfs *tf = container_of(
235 to_config_group(item), struct target_fabric_configfs, tf_group);
236 struct config_group *tf_group;
237 struct config_item *df_item;
238 int i;
239
6708bb27 240 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
c66ac9db
NB		 241 " tf list\n", config_item_name(item));
242
6708bb27 243 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
0dc2e8d1 244 " %s\n", tf->tf_ops->name);
c66ac9db
NB		 245 atomic_dec(&tf->tf_access_cnt);
246
6708bb27 247 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
c66ac9db
NB		 248 " %s\n", config_item_name(item));
249
250 tf_group = &tf->tf_group;
251 for (i = 0; tf_group->default_groups[i]; i++) {
252 df_item = &tf_group->default_groups[i]->cg_item;
253 tf_group->default_groups[i] = NULL;
254 config_item_put(df_item);
255 }
256 config_item_put(item);
257}
258
259static struct configfs_group_operations target_core_fabric_group_ops = {
260 .make_group = &target_core_register_fabric,
261 .drop_item = &target_core_deregister_fabric,
262};
263
264/*
265 * All item attributes appearing in /sys/kernel/target/ appear here.
266 */
267static struct configfs_attribute *target_core_fabric_item_attrs[] = {
268 &target_core_item_attr_version,
269 NULL,
270};
271
272/*
273 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
274 */
275static struct config_item_type target_core_fabrics_item = {
276 .ct_item_ops = &target_core_fabric_item_ops,
277 .ct_group_ops = &target_core_fabric_group_ops,
278 .ct_attrs = target_core_fabric_item_attrs,
279 .ct_owner = THIS_MODULE,
280};
281
282static struct configfs_subsystem target_core_fabrics = {
283 .su_group = {
284 .cg_item = {
285 .ci_namebuf = "target",
286 .ci_type = &target_core_fabrics_item,
287 },
288 },
289};
290
d588cf8f
CH		 291int target_depend_item(struct config_item *item)
292{
293 return configfs_depend_item(&target_core_fabrics, item);
294}
295EXPORT_SYMBOL(target_depend_item);
296
297void target_undepend_item(struct config_item *item)
298{
299 return configfs_undepend_item(&target_core_fabrics, item);
300}
301EXPORT_SYMBOL(target_undepend_item);
c66ac9db
NB		 302
303/*##############################################################################
304// Start functions called by external Target Fabrics Modules
305//############################################################################*/
306
9ac8928e 307static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
c66ac9db 308{
9ac8928e
CH		 309 if (!tfo->name) {
310 pr_err("Missing tfo->name\n");
311 return -EINVAL;
c66ac9db 312 }
9ac8928e 313 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
6708bb27 314 pr_err("Passed name: %s exceeds TARGET_FABRIC"
9ac8928e
CH		 315 "_NAME_SIZE\n", tfo->name);
316 return -EINVAL;
c66ac9db 317 }
6708bb27
AG		 318 if (!tfo->get_fabric_name) {
319 pr_err("Missing tfo->get_fabric_name()\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_check_demo_mode) {
331 pr_err("Missing tfo->tpg_check_demo_mode()\n");
c66ac9db
NB		 332 return -EINVAL;
333 }
6708bb27
AG		 334 if (!tfo->tpg_check_demo_mode_cache) {
335 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
c66ac9db
NB		 336 return -EINVAL;
337 }
6708bb27
AG		 338 if (!tfo->tpg_check_demo_mode_write_protect) {
339 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
c66ac9db
NB		 340 return -EINVAL;
341 }
6708bb27
AG		 342 if (!tfo->tpg_check_prod_mode_write_protect) {
343 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
c66ac9db
NB		 344 return -EINVAL;
345 }
6708bb27
AG		 346 if (!tfo->tpg_get_inst_index) {
347 pr_err("Missing tfo->tpg_get_inst_index()\n");
c66ac9db
NB		 348 return -EINVAL;
349 }
35462975 350 if (!tfo->release_cmd) {
6708bb27 351 pr_err("Missing tfo->release_cmd()\n");
c66ac9db
NB		 352 return -EINVAL;
353 }
6708bb27
AG		 354 if (!tfo->shutdown_session) {
355 pr_err("Missing tfo->shutdown_session()\n");
c66ac9db
NB		 356 return -EINVAL;
357 }
6708bb27
AG		 358 if (!tfo->close_session) {
359 pr_err("Missing tfo->close_session()\n");
c66ac9db
NB		 360 return -EINVAL;
361 }
6708bb27
AG		 362 if (!tfo->sess_get_index) {
363 pr_err("Missing tfo->sess_get_index()\n");
c66ac9db
NB		 364 return -EINVAL;
365 }
6708bb27
AG		 366 if (!tfo->write_pending) {
367 pr_err("Missing tfo->write_pending()\n");
c66ac9db
NB		 368 return -EINVAL;
369 }
6708bb27
AG		 370 if (!tfo->write_pending_status) {
371 pr_err("Missing tfo->write_pending_status()\n");
c66ac9db
NB		 372 return -EINVAL;
373 }
6708bb27
AG		 374 if (!tfo->set_default_node_attributes) {
375 pr_err("Missing tfo->set_default_node_attributes()\n");
c66ac9db
NB		 376 return -EINVAL;
377 }
6708bb27
AG		 378 if (!tfo->get_cmd_state) {
379 pr_err("Missing tfo->get_cmd_state()\n");
c66ac9db
NB		 380 return -EINVAL;
381 }
6708bb27
AG		 382 if (!tfo->queue_data_in) {
383 pr_err("Missing tfo->queue_data_in()\n");
c66ac9db
NB		 384 return -EINVAL;
385 }
6708bb27
AG		 386 if (!tfo->queue_status) {
387 pr_err("Missing tfo->queue_status()\n");
c66ac9db
NB		 388 return -EINVAL;
389 }
6708bb27
AG		 390 if (!tfo->queue_tm_rsp) {
391 pr_err("Missing tfo->queue_tm_rsp()\n");
c66ac9db
NB		 392 return -EINVAL;
393 }
131e6abc
NB		 394 if (!tfo->aborted_task) {
395 pr_err("Missing tfo->aborted_task()\n");
396 return -EINVAL;
397 }
c66ac9db
NB		 398 /*
399 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
400 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
401 * target_core_fabric_configfs.c WWN+TPG group context code.
402 */
6708bb27
AG		 403 if (!tfo->fabric_make_wwn) {
404 pr_err("Missing tfo->fabric_make_wwn()\n");
c66ac9db
NB		 405 return -EINVAL;
406 }
6708bb27
AG		 407 if (!tfo->fabric_drop_wwn) {
408 pr_err("Missing tfo->fabric_drop_wwn()\n");
c66ac9db
NB		 409 return -EINVAL;
410 }
6708bb27
AG		 411 if (!tfo->fabric_make_tpg) {
412 pr_err("Missing tfo->fabric_make_tpg()\n");
c66ac9db
NB		 413 return -EINVAL;
414 }
6708bb27
AG		 415 if (!tfo->fabric_drop_tpg) {
416 pr_err("Missing tfo->fabric_drop_tpg()\n");
c66ac9db
NB		 417 return -EINVAL;
418 }
419
420 return 0;
421}
422
9ac8928e 423int target_register_template(const struct target_core_fabric_ops *fo)
c66ac9db 424{
9ac8928e 425 struct target_fabric_configfs *tf;
c66ac9db
NB		 426 int ret;
427
9ac8928e
CH		 428 ret = target_fabric_tf_ops_check(fo);
429 if (ret)
430 return ret;
431
432 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
6708bb27 433 if (!tf) {
9ac8928e
CH		 434 pr_err("%s: could not allocate memory!\n", __func__);
435 return -ENOMEM;
c66ac9db 436 }
c66ac9db 437
9ac8928e
CH		 438 INIT_LIST_HEAD(&tf->tf_list);
439 atomic_set(&tf->tf_access_cnt, 0);
ef0caf8d 440 tf->tf_ops = fo;
9ac8928e
CH		 441 target_fabric_setup_cits(tf);
442
443 mutex_lock(&g_tf_lock);
444 list_add_tail(&tf->tf_list, &g_tf_list);
445 mutex_unlock(&g_tf_lock);
446
c66ac9db
NB		 447 return 0;
448}
9ac8928e 449EXPORT_SYMBOL(target_register_template);
c66ac9db 450
9ac8928e 451void target_unregister_template(const struct target_core_fabric_ops *fo)
c66ac9db 452{
9ac8928e 453 struct target_fabric_configfs *t;
c66ac9db 454
c66ac9db 455 mutex_lock(&g_tf_lock);
9ac8928e 456 list_for_each_entry(t, &g_tf_list, tf_list) {
0dc2e8d1 457 if (!strcmp(t->tf_ops->name, fo->name)) {
9ac8928e
CH		 458 BUG_ON(atomic_read(&t->tf_access_cnt));
459 list_del(&t->tf_list);
94509182
NB		 460 mutex_unlock(&g_tf_lock);
461 /*
462 * Wait for any outstanding fabric se_deve_entry->rcu_head
463 * callbacks to complete post kfree_rcu(), before allowing
464 * fabric driver unload of TFO->module to proceed.
465 */
466 rcu_barrier();
9ac8928e 467 kfree(t);
94509182 468 return;
9ac8928e 469 }
c66ac9db 470 }
c66ac9db 471 mutex_unlock(&g_tf_lock);
c66ac9db 472}
9ac8928e 473EXPORT_SYMBOL(target_unregister_template);
c66ac9db
NB		 474
475/*##############################################################################
476// Stop functions called by external Target Fabrics Modules
477//############################################################################*/
478
f79a897e 479/* Start functions for struct config_item_type tb_dev_attrib_cit */
3effdb90
CH		 480#define DEF_TB_DEV_ATTRIB_SHOW(_name) \
481static ssize_t show_##_name(struct se_dev_attrib *da, char *page) \
5873c4d1 482{ \
3effdb90 483 return snprintf(page, PAGE_SIZE, "%u\n", da->_name); \
5873c4d1
CH		 484}
485
3effdb90
CH		 486DEF_TB_DEV_ATTRIB_SHOW(emulate_model_alias);
487DEF_TB_DEV_ATTRIB_SHOW(emulate_dpo);
488DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_write);
489DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_read);
490DEF_TB_DEV_ATTRIB_SHOW(emulate_write_cache);
491DEF_TB_DEV_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
492DEF_TB_DEV_ATTRIB_SHOW(emulate_tas);
493DEF_TB_DEV_ATTRIB_SHOW(emulate_tpu);
494DEF_TB_DEV_ATTRIB_SHOW(emulate_tpws);
495DEF_TB_DEV_ATTRIB_SHOW(emulate_caw);
496DEF_TB_DEV_ATTRIB_SHOW(emulate_3pc);
497DEF_TB_DEV_ATTRIB_SHOW(pi_prot_type);
498DEF_TB_DEV_ATTRIB_SHOW(hw_pi_prot_type);
499DEF_TB_DEV_ATTRIB_SHOW(pi_prot_format);
500DEF_TB_DEV_ATTRIB_SHOW(enforce_pr_isids);
501DEF_TB_DEV_ATTRIB_SHOW(is_nonrot);
502DEF_TB_DEV_ATTRIB_SHOW(emulate_rest_reord);
503DEF_TB_DEV_ATTRIB_SHOW(force_pr_aptpl);
504DEF_TB_DEV_ATTRIB_SHOW(hw_block_size);
505DEF_TB_DEV_ATTRIB_SHOW(block_size);
506DEF_TB_DEV_ATTRIB_SHOW(hw_max_sectors);
507DEF_TB_DEV_ATTRIB_SHOW(optimal_sectors);
508DEF_TB_DEV_ATTRIB_SHOW(hw_queue_depth);
509DEF_TB_DEV_ATTRIB_SHOW(queue_depth);
510DEF_TB_DEV_ATTRIB_SHOW(max_unmap_lba_count);
511DEF_TB_DEV_ATTRIB_SHOW(max_unmap_block_desc_count);
512DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity);
513DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity_alignment);
514DEF_TB_DEV_ATTRIB_SHOW(max_write_same_len);
515
516#define DEF_TB_DEV_ATTRIB_STORE_U32(_name) \
517static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
518 size_t count) \
5873c4d1 519{ \
3effdb90 520 u32 val; \
5873c4d1
CH		 521 int ret; \
522 \
3effdb90
CH		 523 ret = kstrtou32(page, 0, &val); \
524 if (ret < 0) \
525 return ret; \
526 da->_name = val; \
527 return count; \
528}
529
530DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_lba_count);
531DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_block_desc_count);
532DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity);
533DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity_alignment);
534DEF_TB_DEV_ATTRIB_STORE_U32(max_write_same_len);
535
536#define DEF_TB_DEV_ATTRIB_STORE_BOOL(_name) \
537static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
538 size_t count) \
539{ \
540 bool flag; \
541 int ret; \
5873c4d1 542 \
3effdb90
CH		 543 ret = strtobool(page, &flag); \
544 if (ret < 0) \
545 return ret; \
546 da->_name = flag; \
547 return count; \
548}
549
550DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_fua_write);
551DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_caw);
552DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_3pc);
553DEF_TB_DEV_ATTRIB_STORE_BOOL(enforce_pr_isids);
554DEF_TB_DEV_ATTRIB_STORE_BOOL(is_nonrot);
555
556#define DEF_TB_DEV_ATTRIB_STORE_STUB(_name) \
557static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
558 size_t count) \
559{ \
560 printk_once(KERN_WARNING \
561 "ignoring deprecated ##_name## attribute\n"); \
562 return count; \
563}
564
565DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_dpo);
566DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_fua_read);
567
568static void dev_set_t10_wwn_model_alias(struct se_device *dev)
569{
570 const char *configname;
571
572 configname = config_item_name(&dev->dev_group.cg_item);
573 if (strlen(configname) >= 16) {
574 pr_warn("dev[%p]: Backstore name '%s' is too long for "
575 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
576 configname);
577 }
578 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
579}
580
581static ssize_t store_emulate_model_alias(struct se_dev_attrib *da,
582 const char *page, size_t count)
583{
584 struct se_device *dev = da->da_dev;
585 bool flag;
586 int ret;
587
588 if (dev->export_count) {
589 pr_err("dev[%p]: Unable to change model alias"
590 " while export_count is %d\n",
591 dev, dev->export_count);
592 return -EINVAL;
593 }
594
595 ret = strtobool(page, &flag);
596 if (ret < 0)
597 return ret;
598
599 if (flag) {
600 dev_set_t10_wwn_model_alias(dev);
601 } else {
602 strncpy(&dev->t10_wwn.model[0],
603 dev->transport->inquiry_prod, 16);
604 }
605 da->emulate_model_alias = flag;
606 return count;
607}
608
609static ssize_t store_emulate_write_cache(struct se_dev_attrib *da,
610 const char *page, size_t count)
611{
612 bool flag;
613 int ret;
614
615 ret = strtobool(page, &flag);
616 if (ret < 0)
617 return ret;
618
619 if (flag && da->da_dev->transport->get_write_cache) {
620 pr_err("emulate_write_cache not supported for this device\n");
621 return -EINVAL;
622 }
623
624 da->emulate_write_cache = flag;
625 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
626 da->da_dev, flag);
627 return count;
628}
629
630static ssize_t store_emulate_ua_intlck_ctrl(struct se_dev_attrib *da,
631 const char *page, size_t count)
632{
633 u32 val;
634 int ret;
635
636 ret = kstrtou32(page, 0, &val);
637 if (ret < 0)
638 return ret;
639
640 if (val != 0 && val != 1 && val != 2) {
641 pr_err("Illegal value %d\n", val);
642 return -EINVAL;
643 }
644
645 if (da->da_dev->export_count) {
646 pr_err("dev[%p]: Unable to change SE Device"
647 " UA_INTRLCK_CTRL while export_count is %d\n",
648 da->da_dev, da->da_dev->export_count);
649 return -EINVAL;
650 }
651 da->emulate_ua_intlck_ctrl = val;
652 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
653 da->da_dev, val);
654 return count;
655}
656
657static ssize_t store_emulate_tas(struct se_dev_attrib *da,
658 const char *page, size_t count)
659{
660 bool flag;
661 int ret;
662
663 ret = strtobool(page, &flag);
664 if (ret < 0)
665 return ret;
666
667 if (da->da_dev->export_count) {
668 pr_err("dev[%p]: Unable to change SE Device TAS while"
669 " export_count is %d\n",
670 da->da_dev, da->da_dev->export_count);
671 return -EINVAL;
672 }
673 da->emulate_tas = flag;
674 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
675 da->da_dev, flag ? "Enabled" : "Disabled");
676
677 return count;
678}
679
680static ssize_t store_emulate_tpu(struct se_dev_attrib *da,
681 const char *page, size_t count)
682{
683 bool flag;
684 int ret;
685
686 ret = strtobool(page, &flag);
687 if (ret < 0)
688 return ret;
689
690 /*
691 * We expect this value to be non-zero when generic Block Layer
692 * Discard supported is detected iblock_create_virtdevice().
693 */
694 if (flag && !da->max_unmap_block_desc_count) {
695 pr_err("Generic Block Discard not supported\n");
696 return -ENOSYS;
697 }
698
699 da->emulate_tpu = flag;
700 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
701 da->da_dev, flag);
702 return count;
703}
704
705static ssize_t store_emulate_tpws(struct se_dev_attrib *da,
706 const char *page, size_t count)
707{
708 bool flag;
709 int ret;
710
711 ret = strtobool(page, &flag);
712 if (ret < 0)
713 return ret;
714
715 /*
716 * We expect this value to be non-zero when generic Block Layer
717 * Discard supported is detected iblock_create_virtdevice().
718 */
719 if (flag && !da->max_unmap_block_desc_count) {
720 pr_err("Generic Block Discard not supported\n");
721 return -ENOSYS;
722 }
723
724 da->emulate_tpws = flag;
725 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
726 da->da_dev, flag);
727 return count;
728}
729
730static ssize_t store_pi_prot_type(struct se_dev_attrib *da,
731 const char *page, size_t count)
732{
733 int old_prot = da->pi_prot_type, ret;
734 struct se_device *dev = da->da_dev;
735 u32 flag;
736
737 ret = kstrtou32(page, 0, &flag);
738 if (ret < 0)
739 return ret;
740
741 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
742 pr_err("Illegal value %d for pi_prot_type\n", flag);
743 return -EINVAL;
744 }
745 if (flag == 2) {
746 pr_err("DIF TYPE2 protection currently not supported\n");
747 return -ENOSYS;
748 }
749 if (da->hw_pi_prot_type) {
750 pr_warn("DIF protection enabled on underlying hardware,"
751 " ignoring\n");
752 return count;
753 }
754 if (!dev->transport->init_prot || !dev->transport->free_prot) {
755 /* 0 is only allowed value for non-supporting backends */
756 if (flag == 0)
bc1a7d6a 757 return count;
3effdb90
CH		 758
759 pr_err("DIF protection not supported by backend: %s\n",
760 dev->transport->name);
761 return -ENOSYS;
762 }
763 if (!(dev->dev_flags & DF_CONFIGURED)) {
764 pr_err("DIF protection requires device to be configured\n");
765 return -ENODEV;
766 }
767 if (dev->export_count) {
768 pr_err("dev[%p]: Unable to change SE Device PROT type while"
769 " export_count is %d\n", dev, dev->export_count);
770 return -EINVAL;
771 }
772
773 da->pi_prot_type = flag;
774
775 if (flag && !old_prot) {
776 ret = dev->transport->init_prot(dev);
777 if (ret) {
778 da->pi_prot_type = old_prot;
779 return ret;
780 }
781
782 } else if (!flag && old_prot) {
783 dev->transport->free_prot(dev);
784 }
785
786 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
787 return count;
788}
789
790static ssize_t store_pi_prot_format(struct se_dev_attrib *da,
791 const char *page, size_t count)
792{
793 struct se_device *dev = da->da_dev;
794 bool flag;
795 int ret;
796
797 ret = strtobool(page, &flag);
798 if (ret < 0)
799 return ret;
800
801 if (!flag)
802 return count;
803
804 if (!dev->transport->format_prot) {
805 pr_err("DIF protection format not supported by backend %s\n",
806 dev->transport->name);
807 return -ENOSYS;
808 }
809 if (!(dev->dev_flags & DF_CONFIGURED)) {
810 pr_err("DIF protection format requires device to be configured\n");
811 return -ENODEV;
812 }
813 if (dev->export_count) {
814 pr_err("dev[%p]: Unable to format SE Device PROT type while"
815 " export_count is %d\n", dev, dev->export_count);
816 return -EINVAL;
817 }
818
819 ret = dev->transport->format_prot(dev);
820 if (ret)
821 return ret;
822
823 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
824 return count;
825}
826
827static ssize_t store_force_pr_aptpl(struct se_dev_attrib *da,
828 const char *page, size_t count)
829{
830 bool flag;
831 int ret;
832
833 ret = strtobool(page, &flag);
834 if (ret < 0)
835 return ret;
836 if (da->da_dev->export_count) {
837 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
838 " export_count is %d\n",
839 da->da_dev, da->da_dev->export_count);
840 return -EINVAL;
841 }
842
843 da->force_pr_aptpl = flag;
844 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
845 return count;
846}
847
848static ssize_t store_emulate_rest_reord(struct se_dev_attrib *da,
849 const char *page, size_t count)
850{
851 bool flag;
852 int ret;
853
854 ret = strtobool(page, &flag);
855 if (ret < 0)
856 return ret;
857
858 if (flag != 0) {
859 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
860 " reordering not implemented\n", da->da_dev);
861 return -ENOSYS;
862 }
863 da->emulate_rest_reord = flag;
864 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
865 da->da_dev, flag);
866 return count;
867}
868
869/*
870 * Note, this can only be called on unexported SE Device Object.
871 */
872static ssize_t store_queue_depth(struct se_dev_attrib *da,
873 const char *page, size_t count)
874{
875 struct se_device *dev = da->da_dev;
876 u32 val;
877 int ret;
878
879 ret = kstrtou32(page, 0, &val);
880 if (ret < 0)
881 return ret;
882
883 if (dev->export_count) {
884 pr_err("dev[%p]: Unable to change SE Device TCQ while"
885 " export_count is %d\n",
886 dev, dev->export_count);
887 return -EINVAL;
888 }
889 if (!val) {
890 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
891 return -EINVAL;
892 }
893
894 if (val > dev->dev_attrib.queue_depth) {
895 if (val > dev->dev_attrib.hw_queue_depth) {
896 pr_err("dev[%p]: Passed queue_depth:"
897 " %u exceeds TCM/SE_Device MAX"
898 " TCQ: %u\n", dev, val,
899 dev->dev_attrib.hw_queue_depth);
900 return -EINVAL;
901 }
902 }
903 da->queue_depth = dev->queue_depth = val;
904 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
905 return count;
906}
907
908static ssize_t store_optimal_sectors(struct se_dev_attrib *da,
909 const char *page, size_t count)
910{
911 u32 val;
912 int ret;
913
914 ret = kstrtou32(page, 0, &val);
915 if (ret < 0)
916 return ret;
917
918 if (da->da_dev->export_count) {
919 pr_err("dev[%p]: Unable to change SE Device"
920 " optimal_sectors while export_count is %d\n",
921 da->da_dev, da->da_dev->export_count);
922 return -EINVAL;
923 }
924 if (val > da->hw_max_sectors) {
925 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
926 " greater than hw_max_sectors: %u\n",
927 da->da_dev, val, da->hw_max_sectors);
928 return -EINVAL;
929 }
930
931 da->optimal_sectors = val;
932 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
933 da->da_dev, val);
934 return count;
5873c4d1
CH		 935}
936
3effdb90
CH		 937static ssize_t store_block_size(struct se_dev_attrib *da,
938 const char *page, size_t count)
939{
940 u32 val;
941 int ret;
942
943 ret = kstrtou32(page, 0, &val);
944 if (ret < 0)
945 return ret;
5873c4d1 946
3effdb90
CH		 947 if (da->da_dev->export_count) {
948 pr_err("dev[%p]: Unable to change SE Device block_size"
949 " while export_count is %d\n",
950 da->da_dev, da->da_dev->export_count);
951 return -EINVAL;
952 }
953
954 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
955 pr_err("dev[%p]: Illegal value for block_device: %u"
956 " for SE device, must be 512, 1024, 2048 or 4096\n",
957 da->da_dev, val);
958 return -EINVAL;
959 }
960
961 da->block_size = val;
962 if (da->max_bytes_per_io)
963 da->hw_max_sectors = da->max_bytes_per_io / val;
964
965 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
966 da->da_dev, val);
967 return count;
968}
5873c4d1
CH		 969
970CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib);
971#define TB_DEV_ATTR(_backend, _name, _mode) \
972static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
3effdb90
CH		 973 __CONFIGFS_EATTR(_name, _mode, \
974 show_##_name, \
975 store_##_name);
5873c4d1 976
3effdb90 977#define TB_DEV_ATTR_RO(_backend, _name) \
5873c4d1
CH		 978static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
979 __CONFIGFS_EATTR_RO(_name, \
3effdb90 980 show_##_name);
5873c4d1
CH		 981
982TB_DEV_ATTR(target_core, emulate_model_alias, S_IRUGO | S_IWUSR);
983TB_DEV_ATTR(target_core, emulate_dpo, S_IRUGO | S_IWUSR);
984TB_DEV_ATTR(target_core, emulate_fua_write, S_IRUGO | S_IWUSR);
985TB_DEV_ATTR(target_core, emulate_fua_read, S_IRUGO | S_IWUSR);
986TB_DEV_ATTR(target_core, emulate_write_cache, S_IRUGO | S_IWUSR);
987TB_DEV_ATTR(target_core, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
988TB_DEV_ATTR(target_core, emulate_tas, S_IRUGO | S_IWUSR);
989TB_DEV_ATTR(target_core, emulate_tpu, S_IRUGO | S_IWUSR);
990TB_DEV_ATTR(target_core, emulate_tpws, S_IRUGO | S_IWUSR);
991TB_DEV_ATTR(target_core, emulate_caw, S_IRUGO | S_IWUSR);
992TB_DEV_ATTR(target_core, emulate_3pc, S_IRUGO | S_IWUSR);
993TB_DEV_ATTR(target_core, pi_prot_type, S_IRUGO | S_IWUSR);
994TB_DEV_ATTR_RO(target_core, hw_pi_prot_type);
995TB_DEV_ATTR(target_core, pi_prot_format, S_IRUGO | S_IWUSR);
996TB_DEV_ATTR(target_core, enforce_pr_isids, S_IRUGO | S_IWUSR);
997TB_DEV_ATTR(target_core, is_nonrot, S_IRUGO | S_IWUSR);
998TB_DEV_ATTR(target_core, emulate_rest_reord, S_IRUGO | S_IWUSR);
999TB_DEV_ATTR(target_core, force_pr_aptpl, S_IRUGO | S_IWUSR)
1000TB_DEV_ATTR_RO(target_core, hw_block_size);
1001TB_DEV_ATTR(target_core, block_size, S_IRUGO | S_IWUSR)
1002TB_DEV_ATTR_RO(target_core, hw_max_sectors);
1003TB_DEV_ATTR(target_core, optimal_sectors, S_IRUGO | S_IWUSR);
1004TB_DEV_ATTR_RO(target_core, hw_queue_depth);
1005TB_DEV_ATTR(target_core, queue_depth, S_IRUGO | S_IWUSR);
1006TB_DEV_ATTR(target_core, max_unmap_lba_count, S_IRUGO | S_IWUSR);
1007TB_DEV_ATTR(target_core, max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
1008TB_DEV_ATTR(target_core, unmap_granularity, S_IRUGO | S_IWUSR);
1009TB_DEV_ATTR(target_core, unmap_granularity_alignment, S_IRUGO | S_IWUSR);
1010TB_DEV_ATTR(target_core, max_write_same_len, S_IRUGO | S_IWUSR);
c66ac9db 1011
c66ac9db 1012CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
c66ac9db
NB		 1013CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
1014
5873c4d1
CH		 1015/*
1016 * dev_attrib attributes for devices using the target core SBC/SPC
1017 * interpreter. Any backend using spc_parse_cdb should be using
1018 * these.
1019 */
1020struct configfs_attribute *sbc_attrib_attrs[] = {
1021 &target_core_dev_attrib_emulate_model_alias.attr,
1022 &target_core_dev_attrib_emulate_dpo.attr,
1023 &target_core_dev_attrib_emulate_fua_write.attr,
1024 &target_core_dev_attrib_emulate_fua_read.attr,
1025 &target_core_dev_attrib_emulate_write_cache.attr,
1026 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
1027 &target_core_dev_attrib_emulate_tas.attr,
1028 &target_core_dev_attrib_emulate_tpu.attr,
1029 &target_core_dev_attrib_emulate_tpws.attr,
1030 &target_core_dev_attrib_emulate_caw.attr,
1031 &target_core_dev_attrib_emulate_3pc.attr,
1032 &target_core_dev_attrib_pi_prot_type.attr,
1033 &target_core_dev_attrib_hw_pi_prot_type.attr,
1034 &target_core_dev_attrib_pi_prot_format.attr,
1035 &target_core_dev_attrib_enforce_pr_isids.attr,
1036 &target_core_dev_attrib_is_nonrot.attr,
1037 &target_core_dev_attrib_emulate_rest_reord.attr,
1038 &target_core_dev_attrib_force_pr_aptpl.attr,
1039 &target_core_dev_attrib_hw_block_size.attr,
1040 &target_core_dev_attrib_block_size.attr,
1041 &target_core_dev_attrib_hw_max_sectors.attr,
1042 &target_core_dev_attrib_optimal_sectors.attr,
1043 &target_core_dev_attrib_hw_queue_depth.attr,
1044 &target_core_dev_attrib_queue_depth.attr,
1045 &target_core_dev_attrib_max_unmap_lba_count.attr,
1046 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
1047 &target_core_dev_attrib_unmap_granularity.attr,
1048 &target_core_dev_attrib_unmap_granularity_alignment.attr,
1049 &target_core_dev_attrib_max_write_same_len.attr,
1050 NULL,
1051};
1052EXPORT_SYMBOL(sbc_attrib_attrs);
1053
5873c4d1
CH		 1054TB_DEV_ATTR_RO(target_pt, hw_pi_prot_type);
1055TB_DEV_ATTR_RO(target_pt, hw_block_size);
1056TB_DEV_ATTR_RO(target_pt, hw_max_sectors);
1057TB_DEV_ATTR_RO(target_pt, hw_queue_depth);
1058
1059/*
1060 * Minimal dev_attrib attributes for devices passing through CDBs.
1061 * In this case we only provide a few read-only attributes for
1062 * backwards compatibility.
1063 */
1064struct configfs_attribute *passthrough_attrib_attrs[] = {
1065 &target_pt_dev_attrib_hw_pi_prot_type.attr,
1066 &target_pt_dev_attrib_hw_block_size.attr,
1067 &target_pt_dev_attrib_hw_max_sectors.attr,
1068 &target_pt_dev_attrib_hw_queue_depth.attr,
1069 NULL,
1070};
1071EXPORT_SYMBOL(passthrough_attrib_attrs);
1072
c66ac9db
NB		 1073static struct configfs_item_operations target_core_dev_attrib_ops = {
1074 .show_attribute = target_core_dev_attrib_attr_show,
1075 .store_attribute = target_core_dev_attrib_attr_store,
1076};
1077
0a06d430 1078TB_CIT_SETUP_DRV(dev_attrib, &target_core_dev_attrib_ops, NULL);
c66ac9db 1079
f79a897e 1080/* End functions for struct config_item_type tb_dev_attrib_cit */
c66ac9db 1081
f8d389c6 1082/* Start functions for struct config_item_type tb_dev_wwn_cit */
c66ac9db
NB		 1083
1084CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
1085#define SE_DEV_WWN_ATTR(_name, _mode) \
1086static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
1087 __CONFIGFS_EATTR(_name, _mode, \
1088 target_core_dev_wwn_show_attr_##_name, \
1089 target_core_dev_wwn_store_attr_##_name);
1090
1091#define SE_DEV_WWN_ATTR_RO(_name); \
1092do { \
1093 static struct target_core_dev_wwn_attribute \
1094 target_core_dev_wwn_##_name = \
1095 __CONFIGFS_EATTR_RO(_name, \
1096 target_core_dev_wwn_show_attr_##_name); \
1097} while (0);
1098
1099/*
1100 * VPD page 0x80 Unit serial
1101 */
1102static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
1103 struct t10_wwn *t10_wwn,
1104 char *page)
1105{
c66ac9db
NB		 1106 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1107 &t10_wwn->unit_serial[0]);
1108}
1109
1110static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
1111 struct t10_wwn *t10_wwn,
1112 const char *page,
1113 size_t count)
1114{
0fd97ccf 1115 struct se_device *dev = t10_wwn->t10_dev;
c66ac9db
NB		 1116 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1117
1118 /*
1119 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1120 * from the struct scsi_device level firmware, do not allow
1121 * VPD Unit Serial to be emulated.
1122 *
1123 * Note this struct scsi_device could also be emulating VPD
1124 * information from its drivers/scsi LLD. But for now we assume
1125 * it is doing 'the right thing' wrt a world wide unique
1126 * VPD Unit Serial Number that OS dependent multipath can depend on.
1127 */
0fd97ccf 1128 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
6708bb27 1129 pr_err("Underlying SCSI device firmware provided VPD"
c66ac9db
NB		 1130 " Unit Serial, ignoring request\n");
1131 return -EOPNOTSUPP;
1132 }
1133
60d645a4 1134 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
6708bb27 1135 pr_err("Emulated VPD Unit Serial exceeds"
c66ac9db
NB		 1136 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1137 return -EOVERFLOW;
1138 }
1139 /*
1140 * Check to see if any active $FABRIC_MOD exports exist. If they
1141 * do exist, fail here as changing this information on the fly
1142 * (underneath the initiator side OS dependent multipath code)
1143 * could cause negative effects.
1144 */
0fd97ccf
CH		 1145 if (dev->export_count) {
1146 pr_err("Unable to set VPD Unit Serial while"
1147 " active %d $FABRIC_MOD exports exist\n",
1148 dev->export_count);
1149 return -EINVAL;
c66ac9db 1150 }
0fd97ccf 1151
c66ac9db
NB		 1152 /*
1153 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1154 *
1155 * Also, strip any newline added from the userspace
1156 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1157 */
1158 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1159 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
0fd97ccf 1160 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
c66ac9db 1161 "%s", strstrip(buf));
0fd97ccf 1162 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
c66ac9db 1163
6708bb27 1164 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
0fd97ccf 1165 " %s\n", dev->t10_wwn.unit_serial);
c66ac9db
NB		 1166
1167 return count;
1168}
1169
1170SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
1171
1172/*
1173 * VPD page 0x83 Protocol Identifier
1174 */
1175static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
1176 struct t10_wwn *t10_wwn,
1177 char *page)
1178{
c66ac9db
NB		 1179 struct t10_vpd *vpd;
1180 unsigned char buf[VPD_TMP_BUF_SIZE];
1181 ssize_t len = 0;
1182
c66ac9db
NB		 1183 memset(buf, 0, VPD_TMP_BUF_SIZE);
1184
1185 spin_lock(&t10_wwn->t10_vpd_lock);
1186 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
6708bb27 1187 if (!vpd->protocol_identifier_set)
c66ac9db
NB		 1188 continue;
1189
1190 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1191
6708bb27 1192 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 1193 break;
1194
1195 len += sprintf(page+len, "%s", buf);
1196 }
1197 spin_unlock(&t10_wwn->t10_vpd_lock);
1198
1199 return len;
1200}
1201
1202static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
1203 struct t10_wwn *t10_wwn,
1204 const char *page,
1205 size_t count)
1206{
1207 return -ENOSYS;
1208}
1209
1210SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
1211
1212/*
1213 * Generic wrapper for dumping VPD identifiers by association.
1214 */
1215#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1216static ssize_t target_core_dev_wwn_show_attr_##_name( \
1217 struct t10_wwn *t10_wwn, \
1218 char *page) \
1219{ \
c66ac9db
NB		 1220 struct t10_vpd *vpd; \
1221 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1222 ssize_t len = 0; \
1223 \
c66ac9db
NB		 1224 spin_lock(&t10_wwn->t10_vpd_lock); \
1225 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1226 if (vpd->association != _assoc) \
1227 continue; \
1228 \
1229 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1230 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 1231 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 1232 break; \
1233 len += sprintf(page+len, "%s", buf); \
1234 \
1235 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1236 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 1237 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 1238 break; \
1239 len += sprintf(page+len, "%s", buf); \
1240 \
1241 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1242 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 1243 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 1244 break; \
1245 len += sprintf(page+len, "%s", buf); \
1246 } \
1247 spin_unlock(&t10_wwn->t10_vpd_lock); \
1248 \
1249 return len; \
1250}
1251
1252/*
163cd5fa 1253 * VPD page 0x83 Association: Logical Unit
c66ac9db
NB		 1254 */
1255DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1256
1257static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
1258 struct t10_wwn *t10_wwn,
1259 const char *page,
1260 size_t count)
1261{
1262 return -ENOSYS;
1263}
1264
1265SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1266
1267/*
1268 * VPD page 0x83 Association: Target Port
1269 */
1270DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1271
1272static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1273 struct t10_wwn *t10_wwn,
1274 const char *page,
1275 size_t count)
1276{
1277 return -ENOSYS;
1278}
1279
1280SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1281
1282/*
1283 * VPD page 0x83 Association: SCSI Target Device
1284 */
1285DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1286
1287static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1288 struct t10_wwn *t10_wwn,
1289 const char *page,
1290 size_t count)
1291{
1292 return -ENOSYS;
1293}
1294
1295SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1296
1297CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1298
1299static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1300 &target_core_dev_wwn_vpd_unit_serial.attr,
1301 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1302 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1303 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1304 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1305 NULL,
1306};
1307
1308static struct configfs_item_operations target_core_dev_wwn_ops = {
1309 .show_attribute = target_core_dev_wwn_attr_show,
1310 .store_attribute = target_core_dev_wwn_attr_store,
1311};
1312
f8d389c6 1313TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
c66ac9db 1314
f8d389c6 1315/* End functions for struct config_item_type tb_dev_wwn_cit */
c66ac9db 1316
91e2e39b 1317/* Start functions for struct config_item_type tb_dev_pr_cit */
c66ac9db 1318
0fd97ccf 1319CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
c66ac9db
NB		 1320#define SE_DEV_PR_ATTR(_name, _mode) \
1321static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1322 __CONFIGFS_EATTR(_name, _mode, \
1323 target_core_dev_pr_show_attr_##_name, \
1324 target_core_dev_pr_store_attr_##_name);
1325
1326#define SE_DEV_PR_ATTR_RO(_name); \
1327static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1328 __CONFIGFS_EATTR_RO(_name, \
1329 target_core_dev_pr_show_attr_##_name);
1330
d977f437
CH		 1331static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1332 char *page)
c66ac9db
NB		 1333{
1334 struct se_node_acl *se_nacl;
1335 struct t10_pr_registration *pr_reg;
1336 char i_buf[PR_REG_ISID_ID_LEN];
c66ac9db
NB		 1337
1338 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1339
c66ac9db 1340 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 1341 if (!pr_reg)
1342 return sprintf(page, "No SPC-3 Reservation holder\n");
1343
c66ac9db 1344 se_nacl = pr_reg->pr_reg_nacl;
d2843c17 1345 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
c66ac9db 1346
d977f437 1347 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
e3d6f909 1348 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
d2843c17 1349 se_nacl->initiatorname, i_buf);
c66ac9db
NB		 1350}
1351
d977f437
CH		 1352static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1353 char *page)
c66ac9db
NB		 1354{
1355 struct se_node_acl *se_nacl;
d977f437 1356 ssize_t len;
c66ac9db 1357
c66ac9db 1358 se_nacl = dev->dev_reserved_node_acl;
d977f437
CH		 1359 if (se_nacl) {
1360 len = sprintf(page,
1361 "SPC-2 Reservation: %s Initiator: %s\n",
1362 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1363 se_nacl->initiatorname);
1364 } else {
1365 len = sprintf(page, "No SPC-2 Reservation holder\n");
c66ac9db 1366 }
d977f437 1367 return len;
c66ac9db
NB		 1368}
1369
0fd97ccf
CH		 1370static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1371 char *page)
c66ac9db 1372{
d977f437 1373 int ret;
c66ac9db 1374
a3541703 1375 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
d977f437 1376 return sprintf(page, "Passthrough\n");
c66ac9db 1377
d977f437
CH		 1378 spin_lock(&dev->dev_reservation_lock);
1379 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1380 ret = target_core_dev_pr_show_spc2_res(dev, page);
1381 else
1382 ret = target_core_dev_pr_show_spc3_res(dev, page);
1383 spin_unlock(&dev->dev_reservation_lock);
1384 return ret;
c66ac9db
NB		 1385}
1386
1387SE_DEV_PR_ATTR_RO(res_holder);
1388
c66ac9db 1389static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
0fd97ccf 1390 struct se_device *dev, char *page)
c66ac9db 1391{
c66ac9db
NB		 1392 ssize_t len = 0;
1393
c66ac9db 1394 spin_lock(&dev->dev_reservation_lock);
d977f437 1395 if (!dev->dev_pr_res_holder) {
c66ac9db 1396 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 1397 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
c66ac9db
NB		 1398 len = sprintf(page, "SPC-3 Reservation: All Target"
1399 " Ports registration\n");
d977f437 1400 } else {
c66ac9db
NB		 1401 len = sprintf(page, "SPC-3 Reservation: Single"
1402 " Target Port registration\n");
d977f437 1403 }
c66ac9db 1404
d977f437 1405 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 1406 return len;
1407}
1408
1409SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1410
c66ac9db 1411static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
0fd97ccf 1412 struct se_device *dev, char *page)
c66ac9db 1413{
0fd97ccf 1414 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
c66ac9db
NB		 1415}
1416
1417SE_DEV_PR_ATTR_RO(res_pr_generation);
1418
1419/*
1420 * res_pr_holder_tg_port
1421 */
1422static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
0fd97ccf 1423 struct se_device *dev, char *page)
c66ac9db 1424{
c66ac9db 1425 struct se_node_acl *se_nacl;
c66ac9db
NB		 1426 struct se_portal_group *se_tpg;
1427 struct t10_pr_registration *pr_reg;
9ac8928e 1428 const struct target_core_fabric_ops *tfo;
c66ac9db
NB		 1429 ssize_t len = 0;
1430
c66ac9db
NB		 1431 spin_lock(&dev->dev_reservation_lock);
1432 pr_reg = dev->dev_pr_res_holder;
6708bb27 1433 if (!pr_reg) {
c66ac9db 1434 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 1435 goto out_unlock;
c66ac9db 1436 }
d977f437 1437
c66ac9db
NB		 1438 se_nacl = pr_reg->pr_reg_nacl;
1439 se_tpg = se_nacl->se_tpg;
e3d6f909 1440 tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 1441
1442 len += sprintf(page+len, "SPC-3 Reservation: %s"
1443 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1444 tfo->tpg_get_wwn(se_tpg));
1445 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
35d1efe8 1446 " Identifier Tag: %hu %s Portal Group Tag: %hu"
f2d30680 1447 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
c66ac9db 1448 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
79dc9c9e 1449 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
c66ac9db 1450
d977f437
CH		 1451out_unlock:
1452 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 1453 return len;
1454}
1455
1456SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1457
c66ac9db 1458static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
0fd97ccf 1459 struct se_device *dev, char *page)
c66ac9db 1460{
9ac8928e 1461 const struct target_core_fabric_ops *tfo;
c66ac9db
NB		 1462 struct t10_pr_registration *pr_reg;
1463 unsigned char buf[384];
1464 char i_buf[PR_REG_ISID_ID_LEN];
1465 ssize_t len = 0;
d2843c17 1466 int reg_count = 0;
c66ac9db 1467
c66ac9db
NB		 1468 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1469
0fd97ccf
CH		 1470 spin_lock(&dev->t10_pr.registration_lock);
1471 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
c66ac9db
NB		 1472 pr_reg_list) {
1473
1474 memset(buf, 0, 384);
1475 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1476 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
d2843c17 1477 core_pr_dump_initiator_port(pr_reg, i_buf,
c66ac9db
NB		 1478 PR_REG_ISID_ID_LEN);
1479 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1480 tfo->get_fabric_name(),
d2843c17 1481 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
c66ac9db
NB		 1482 pr_reg->pr_res_generation);
1483
6708bb27 1484 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 1485 break;
1486
1487 len += sprintf(page+len, "%s", buf);
1488 reg_count++;
1489 }
0fd97ccf 1490 spin_unlock(&dev->t10_pr.registration_lock);
c66ac9db 1491
6708bb27 1492 if (!reg_count)
c66ac9db
NB		 1493 len += sprintf(page+len, "None\n");
1494
1495 return len;
1496}
1497
1498SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1499
c66ac9db 1500static ssize_t target_core_dev_pr_show_attr_res_pr_type(
0fd97ccf 1501 struct se_device *dev, char *page)
c66ac9db 1502{
c66ac9db
NB		 1503 struct t10_pr_registration *pr_reg;
1504 ssize_t len = 0;
1505
c66ac9db
NB		 1506 spin_lock(&dev->dev_reservation_lock);
1507 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 1508 if (pr_reg) {
1509 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1510 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1511 } else {
c66ac9db 1512 len = sprintf(page, "No SPC-3 Reservation holder\n");
c66ac9db 1513 }
c66ac9db 1514
d977f437 1515 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 1516 return len;
1517}
1518
1519SE_DEV_PR_ATTR_RO(res_pr_type);
1520
c66ac9db 1521static ssize_t target_core_dev_pr_show_attr_res_type(
0fd97ccf 1522 struct se_device *dev, char *page)
c66ac9db 1523{
a3541703 1524 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
d977f437
CH		 1525 return sprintf(page, "SPC_PASSTHROUGH\n");
1526 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1527 return sprintf(page, "SPC2_RESERVATIONS\n");
1528 else
1529 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
c66ac9db
NB		 1530}
1531
1532SE_DEV_PR_ATTR_RO(res_type);
1533
c66ac9db 1534static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
0fd97ccf 1535 struct se_device *dev, char *page)
c66ac9db 1536{
a3541703 1537 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
c66ac9db
NB		 1538 return 0;
1539
1540 return sprintf(page, "APTPL Bit Status: %s\n",
0fd97ccf 1541 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
c66ac9db
NB		 1542}
1543
1544SE_DEV_PR_ATTR_RO(res_aptpl_active);
1545
1546/*
1547 * res_aptpl_metadata
1548 */
1549static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
0fd97ccf 1550 struct se_device *dev, char *page)
c66ac9db 1551{
a3541703 1552 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
c66ac9db
NB		 1553 return 0;
1554
1555 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1556}
1557
1558enum {
1559 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1560 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1561 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1562 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1563};
1564
1565static match_table_t tokens = {
1566 {Opt_initiator_fabric, "initiator_fabric=%s"},
1567 {Opt_initiator_node, "initiator_node=%s"},
1568 {Opt_initiator_sid, "initiator_sid=%s"},
1569 {Opt_sa_res_key, "sa_res_key=%s"},
1570 {Opt_res_holder, "res_holder=%d"},
1571 {Opt_res_type, "res_type=%d"},
1572 {Opt_res_scope, "res_scope=%d"},
1573 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
f2d30680 1574 {Opt_mapped_lun, "mapped_lun=%lld"},
c66ac9db
NB		 1575 {Opt_target_fabric, "target_fabric=%s"},
1576 {Opt_target_node, "target_node=%s"},
1577 {Opt_tpgt, "tpgt=%d"},
1578 {Opt_port_rtpi, "port_rtpi=%d"},
f2d30680 1579 {Opt_target_lun, "target_lun=%lld"},
c66ac9db
NB		 1580 {Opt_err, NULL}
1581};
1582
1583static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
0fd97ccf 1584 struct se_device *dev,
c66ac9db
NB		 1585 const char *page,
1586 size_t count)
1587{
6d180253
JJ		 1588 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1589 unsigned char *t_fabric = NULL, *t_port = NULL;
8d213559 1590 char *orig, *ptr, *opts;
c66ac9db
NB		 1591 substring_t args[MAX_OPT_ARGS];
1592 unsigned long long tmp_ll;
1593 u64 sa_res_key = 0;
f2d30680 1594 u64 mapped_lun = 0, target_lun = 0;
c66ac9db 1595 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
45fb94c2
BVA		 1596 u16 tpgt = 0;
1597 u8 type = 0;
c66ac9db 1598
a3541703 1599 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
9105bfc0 1600 return count;
d977f437 1601 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
9105bfc0 1602 return count;
c66ac9db 1603
0fd97ccf 1604 if (dev->export_count) {
6708bb27 1605 pr_debug("Unable to process APTPL metadata while"
c66ac9db
NB		 1606 " active fabric exports exist\n");
1607 return -EINVAL;
1608 }
1609
1610 opts = kstrdup(page, GFP_KERNEL);
1611 if (!opts)
1612 return -ENOMEM;
1613
1614 orig = opts;
90c161b6 1615 while ((ptr = strsep(&opts, ",\n")) != NULL) {
c66ac9db
NB		 1616 if (!*ptr)
1617 continue;
1618
1619 token = match_token(ptr, tokens, args);
1620 switch (token) {
1621 case Opt_initiator_fabric:
8d213559 1622 i_fabric = match_strdup(args);
6d180253
JJ		 1623 if (!i_fabric) {
1624 ret = -ENOMEM;
1625 goto out;
1626 }
c66ac9db
NB		 1627 break;
1628 case Opt_initiator_node:
8d213559 1629 i_port = match_strdup(args);
6d180253
JJ		 1630 if (!i_port) {
1631 ret = -ENOMEM;
1632 goto out;
1633 }
60d645a4 1634 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
6708bb27 1635 pr_err("APTPL metadata initiator_node="
c66ac9db
NB		 1636 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1637 PR_APTPL_MAX_IPORT_LEN);
1638 ret = -EINVAL;
1639 break;
1640 }
1641 break;
1642 case Opt_initiator_sid:
8d213559 1643 isid = match_strdup(args);
6d180253
JJ		 1644 if (!isid) {
1645 ret = -ENOMEM;
1646 goto out;
1647 }
60d645a4 1648 if (strlen(isid) >= PR_REG_ISID_LEN) {
6708bb27 1649 pr_err("APTPL metadata initiator_isid"
c66ac9db
NB		 1650 "= exceeds PR_REG_ISID_LEN: %d\n",
1651 PR_REG_ISID_LEN);
1652 ret = -EINVAL;
1653 break;
1654 }
1655 break;
1656 case Opt_sa_res_key:
8d213559 1657 ret = kstrtoull(args->from, 0, &tmp_ll);
c66ac9db 1658 if (ret < 0) {
8d213559 1659 pr_err("kstrtoull() failed for sa_res_key=\n");
c66ac9db
NB		 1660 goto out;
1661 }
1662 sa_res_key = (u64)tmp_ll;
1663 break;
1664 /*
1665 * PR APTPL Metadata for Reservation
1666 */
1667 case Opt_res_holder:
c2091026
DD		 1668 ret = match_int(args, &arg);
1669 if (ret)
1670 goto out;
c66ac9db
NB		 1671 res_holder = arg;
1672 break;
1673 case Opt_res_type:
c2091026
DD		 1674 ret = match_int(args, &arg);
1675 if (ret)
1676 goto out;
c66ac9db
NB		 1677 type = (u8)arg;
1678 break;
1679 case Opt_res_scope:
c2091026
DD		 1680 ret = match_int(args, &arg);
1681 if (ret)
1682 goto out;
c66ac9db
NB		 1683 break;
1684 case Opt_res_all_tg_pt:
c2091026
DD		 1685 ret = match_int(args, &arg);
1686 if (ret)
1687 goto out;
c66ac9db
NB		 1688 all_tg_pt = (int)arg;
1689 break;
1690 case Opt_mapped_lun:
c2091026
DD		 1691 ret = match_int(args, &arg);
1692 if (ret)
1693 goto out;
f2d30680 1694 mapped_lun = (u64)arg;
c66ac9db
NB		 1695 break;
1696 /*
1697 * PR APTPL Metadata for Target Port
1698 */
1699 case Opt_target_fabric:
8d213559 1700 t_fabric = match_strdup(args);
6d180253
JJ		 1701 if (!t_fabric) {
1702 ret = -ENOMEM;
1703 goto out;
1704 }
c66ac9db
NB		 1705 break;
1706 case Opt_target_node:
8d213559 1707 t_port = match_strdup(args);
6d180253
JJ		 1708 if (!t_port) {
1709 ret = -ENOMEM;
1710 goto out;
1711 }
60d645a4 1712 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
6708bb27 1713 pr_err("APTPL metadata target_node="
c66ac9db
NB		 1714 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1715 PR_APTPL_MAX_TPORT_LEN);
1716 ret = -EINVAL;
1717 break;
1718 }
1719 break;
1720 case Opt_tpgt:
c2091026
DD		 1721 ret = match_int(args, &arg);
1722 if (ret)
1723 goto out;
c66ac9db
NB		 1724 tpgt = (u16)arg;
1725 break;
1726 case Opt_port_rtpi:
c2091026
DD		 1727 ret = match_int(args, &arg);
1728 if (ret)
1729 goto out;
c66ac9db
NB		 1730 break;
1731 case Opt_target_lun:
c2091026
DD		 1732 ret = match_int(args, &arg);
1733 if (ret)
1734 goto out;
f2d30680 1735 target_lun = (u64)arg;
c66ac9db
NB		 1736 break;
1737 default:
1738 break;
1739 }
1740 }
1741
6708bb27
AG		 1742 if (!i_port || !t_port || !sa_res_key) {
1743 pr_err("Illegal parameters for APTPL registration\n");
c66ac9db
NB		 1744 ret = -EINVAL;
1745 goto out;
1746 }
1747
1748 if (res_holder && !(type)) {
6708bb27 1749 pr_err("Illegal PR type: 0x%02x for reservation"
c66ac9db
NB		 1750 " holder\n", type);
1751 ret = -EINVAL;
1752 goto out;
1753 }
1754
0fd97ccf 1755 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
c66ac9db
NB		 1756 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1757 res_holder, all_tg_pt, type);
1758out:
6d180253
JJ		 1759 kfree(i_fabric);
1760 kfree(i_port);
1761 kfree(isid);
1762 kfree(t_fabric);
1763 kfree(t_port);
c66ac9db
NB		 1764 kfree(orig);
1765 return (ret == 0) ? count : ret;
1766}
1767
1768SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1769
0fd97ccf 1770CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
c66ac9db
NB		 1771
1772static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1773 &target_core_dev_pr_res_holder.attr,
1774 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1775 &target_core_dev_pr_res_pr_generation.attr,
1776 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1777 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1778 &target_core_dev_pr_res_pr_type.attr,
1779 &target_core_dev_pr_res_type.attr,
1780 &target_core_dev_pr_res_aptpl_active.attr,
1781 &target_core_dev_pr_res_aptpl_metadata.attr,
1782 NULL,
1783};
1784
1785static struct configfs_item_operations target_core_dev_pr_ops = {
1786 .show_attribute = target_core_dev_pr_attr_show,
1787 .store_attribute = target_core_dev_pr_attr_store,
1788};
1789
91e2e39b 1790TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
c66ac9db 1791
91e2e39b 1792/* End functions for struct config_item_type tb_dev_pr_cit */
c66ac9db 1793
73112edc 1794/* Start functions for struct config_item_type tb_dev_cit */
c66ac9db
NB		 1795
1796static ssize_t target_core_show_dev_info(void *p, char *page)
1797{
0fd97ccf 1798 struct se_device *dev = p;
c66ac9db
NB		 1799 int bl = 0;
1800 ssize_t read_bytes = 0;
1801
0fd97ccf 1802 transport_dump_dev_state(dev, page, &bl);
c66ac9db 1803 read_bytes += bl;
0a06d430
CH		 1804 read_bytes += dev->transport->show_configfs_dev_params(dev,
1805 page+read_bytes);
c66ac9db
NB		 1806 return read_bytes;
1807}
1808
1809static struct target_core_configfs_attribute target_core_attr_dev_info = {
1810 .attr = { .ca_owner = THIS_MODULE,
1811 .ca_name = "info",
1812 .ca_mode = S_IRUGO },
1813 .show = target_core_show_dev_info,
1814 .store = NULL,
1815};
1816
1817static ssize_t target_core_store_dev_control(
1818 void *p,
1819 const char *page,
1820 size_t count)
1821{
0fd97ccf 1822 struct se_device *dev = p;
c66ac9db 1823
0a06d430 1824 return dev->transport->set_configfs_dev_params(dev, page, count);
c66ac9db
NB		 1825}
1826
1827static struct target_core_configfs_attribute target_core_attr_dev_control = {
1828 .attr = { .ca_owner = THIS_MODULE,
1829 .ca_name = "control",
1830 .ca_mode = S_IWUSR },
1831 .show = NULL,
1832 .store = target_core_store_dev_control,
1833};
1834
1835static ssize_t target_core_show_dev_alias(void *p, char *page)
1836{
0fd97ccf 1837 struct se_device *dev = p;
c66ac9db 1838
0fd97ccf 1839 if (!(dev->dev_flags & DF_USING_ALIAS))
c66ac9db
NB		 1840 return 0;
1841
0fd97ccf 1842 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
c66ac9db
NB		 1843}
1844
1845static ssize_t target_core_store_dev_alias(
1846 void *p,
1847 const char *page,
1848 size_t count)
1849{
0fd97ccf
CH		 1850 struct se_device *dev = p;
1851 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1852 ssize_t read_bytes;
1853
1854 if (count > (SE_DEV_ALIAS_LEN-1)) {
6708bb27 1855 pr_err("alias count: %d exceeds"
c66ac9db
NB		 1856 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1857 SE_DEV_ALIAS_LEN-1);
1858 return -EINVAL;
1859 }
1860
0fd97ccf 1861 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
3011684c
DC		 1862 if (!read_bytes)
1863 return -EINVAL;
0fd97ccf
CH		 1864 if (dev->dev_alias[read_bytes - 1] == '\n')
1865 dev->dev_alias[read_bytes - 1] = '\0';
0877eafd 1866
0fd97ccf 1867 dev->dev_flags |= DF_USING_ALIAS;
3011684c 1868
6708bb27 1869 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
c66ac9db 1870 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1871 config_item_name(&dev->dev_group.cg_item),
1872 dev->dev_alias);
c66ac9db
NB		 1873
1874 return read_bytes;
1875}
1876
1877static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1878 .attr = { .ca_owner = THIS_MODULE,
1879 .ca_name = "alias",
1880 .ca_mode = S_IRUGO | S_IWUSR },
1881 .show = target_core_show_dev_alias,
1882 .store = target_core_store_dev_alias,
1883};
1884
1885static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1886{
0fd97ccf 1887 struct se_device *dev = p;
c66ac9db 1888
0fd97ccf 1889 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
c66ac9db
NB		 1890 return 0;
1891
0fd97ccf 1892 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
c66ac9db
NB		 1893}
1894
1895static ssize_t target_core_store_dev_udev_path(
1896 void *p,
1897 const char *page,
1898 size_t count)
1899{
0fd97ccf
CH		 1900 struct se_device *dev = p;
1901 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1902 ssize_t read_bytes;
1903
1904 if (count > (SE_UDEV_PATH_LEN-1)) {
6708bb27 1905 pr_err("udev_path count: %d exceeds"
c66ac9db
NB		 1906 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1907 SE_UDEV_PATH_LEN-1);
1908 return -EINVAL;
1909 }
1910
0fd97ccf 1911 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
c66ac9db 1912 "%s", page);
3011684c
DC		 1913 if (!read_bytes)
1914 return -EINVAL;
0fd97ccf
CH		 1915 if (dev->udev_path[read_bytes - 1] == '\n')
1916 dev->udev_path[read_bytes - 1] = '\0';
0877eafd 1917
0fd97ccf 1918 dev->dev_flags |= DF_USING_UDEV_PATH;
3011684c 1919
6708bb27 1920 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
c66ac9db 1921 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1922 config_item_name(&dev->dev_group.cg_item),
1923 dev->udev_path);
c66ac9db
NB		 1924
1925 return read_bytes;
1926}
1927
1928static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1929 .attr = { .ca_owner = THIS_MODULE,
1930 .ca_name = "udev_path",
1931 .ca_mode = S_IRUGO | S_IWUSR },
1932 .show = target_core_show_dev_udev_path,
1933 .store = target_core_store_dev_udev_path,
1934};
1935
64146db7
AG		 1936static ssize_t target_core_show_dev_enable(void *p, char *page)
1937{
1938 struct se_device *dev = p;
1939
1940 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1941}
1942
c66ac9db
NB		 1943static ssize_t target_core_store_dev_enable(
1944 void *p,
1945 const char *page,
1946 size_t count)
1947{
0fd97ccf 1948 struct se_device *dev = p;
c66ac9db 1949 char *ptr;
0fd97ccf 1950 int ret;
c66ac9db
NB		 1951
1952 ptr = strstr(page, "1");
6708bb27
AG		 1953 if (!ptr) {
1954 pr_err("For dev_enable ops, only valid value"
c66ac9db
NB		 1955 " is \"1\"\n");
1956 return -EINVAL;
1957 }
c66ac9db 1958
0fd97ccf
CH		 1959 ret = target_configure_device(dev);
1960 if (ret)
1961 return ret;
c66ac9db
NB		 1962 return count;
1963}
1964
1965static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1966 .attr = { .ca_owner = THIS_MODULE,
1967 .ca_name = "enable",
64146db7
AG		 1968 .ca_mode = S_IRUGO | S_IWUSR },
1969 .show = target_core_show_dev_enable,
c66ac9db
NB		 1970 .store = target_core_store_dev_enable,
1971};
1972
1973static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1974{
0fd97ccf 1975 struct se_device *dev = p;
c66ac9db
NB		 1976 struct config_item *lu_ci;
1977 struct t10_alua_lu_gp *lu_gp;
1978 struct t10_alua_lu_gp_member *lu_gp_mem;
1979 ssize_t len = 0;
1980
c66ac9db 1981 lu_gp_mem = dev->dev_alua_lu_gp_mem;
c87fbd56
CH		 1982 if (!lu_gp_mem)
1983 return 0;
c66ac9db
NB		 1984
1985 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1986 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1987 if (lu_gp) {
c66ac9db
NB		 1988 lu_ci = &lu_gp->lu_gp_group.cg_item;
1989 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1990 config_item_name(lu_ci), lu_gp->lu_gp_id);
1991 }
1992 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1993
1994 return len;
1995}
1996
1997static ssize_t target_core_store_alua_lu_gp(
1998 void *p,
1999 const char *page,
2000 size_t count)
2001{
0fd97ccf
CH		 2002 struct se_device *dev = p;
2003 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 2004 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2005 struct t10_alua_lu_gp_member *lu_gp_mem;
2006 unsigned char buf[LU_GROUP_NAME_BUF];
2007 int move = 0;
2008
c87fbd56
CH		 2009 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2010 if (!lu_gp_mem)
9105bfc0 2011 return count;
c87fbd56 2012
c66ac9db 2013 if (count > LU_GROUP_NAME_BUF) {
6708bb27 2014 pr_err("ALUA LU Group Alias too large!\n");
c66ac9db
NB		 2015 return -EINVAL;
2016 }
2017 memset(buf, 0, LU_GROUP_NAME_BUF);
2018 memcpy(buf, page, count);
2019 /*
2020 * Any ALUA logical unit alias besides "NULL" means we will be
2021 * making a new group association.
2022 */
2023 if (strcmp(strstrip(buf), "NULL")) {
2024 /*
2025 * core_alua_get_lu_gp_by_name() will increment reference to
2026 * struct t10_alua_lu_gp. This reference is released with
2027 * core_alua_get_lu_gp_by_name below().
2028 */
2029 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
6708bb27 2030 if (!lu_gp_new)
c66ac9db
NB		 2031 return -ENODEV;
2032 }
c66ac9db
NB		 2033
2034 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2035 lu_gp = lu_gp_mem->lu_gp;
6708bb27 2036 if (lu_gp) {
c66ac9db
NB		 2037 /*
2038 * Clearing an existing lu_gp association, and replacing
2039 * with NULL
2040 */
6708bb27
AG		 2041 if (!lu_gp_new) {
2042 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
c66ac9db
NB		 2043 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2044 " %hu\n",
2045 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 2046 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 2047 config_item_name(&lu_gp->lu_gp_group.cg_item),
2048 lu_gp->lu_gp_id);
2049
2050 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2051 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2052
2053 return count;
2054 }
2055 /*
2056 * Removing existing association of lu_gp_mem with lu_gp
2057 */
2058 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2059 move = 1;
2060 }
2061 /*
2062 * Associate lu_gp_mem with lu_gp_new.
2063 */
2064 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2065 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2066
6708bb27 2067 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
c66ac9db
NB		 2068 " core/alua/lu_gps/%s, ID: %hu\n",
2069 (move) ? "Moving" : "Adding",
2070 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 2071 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 2072 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2073 lu_gp_new->lu_gp_id);
2074
2075 core_alua_put_lu_gp_from_name(lu_gp_new);
2076 return count;
2077}
2078
2079static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
2080 .attr = { .ca_owner = THIS_MODULE,
2081 .ca_name = "alua_lu_gp",
2082 .ca_mode = S_IRUGO | S_IWUSR },
2083 .show = target_core_show_alua_lu_gp,
2084 .store = target_core_store_alua_lu_gp,
2085};
2086
229d4f11
HR		 2087static ssize_t target_core_show_dev_lba_map(void *p, char *page)
2088{
2089 struct se_device *dev = p;
2090 struct t10_alua_lba_map *map;
2091 struct t10_alua_lba_map_member *mem;
2092 char *b = page;
2093 int bl = 0;
2094 char state;
2095
2096 spin_lock(&dev->t10_alua.lba_map_lock);
2097 if (!list_empty(&dev->t10_alua.lba_map_list))
2098 bl += sprintf(b + bl, "%u %u\n",
2099 dev->t10_alua.lba_map_segment_size,
2100 dev->t10_alua.lba_map_segment_multiplier);
2101 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2102 bl += sprintf(b + bl, "%llu %llu",
2103 map->lba_map_first_lba, map->lba_map_last_lba);
2104 list_for_each_entry(mem, &map->lba_map_mem_list,
2105 lba_map_mem_list) {
2106 switch (mem->lba_map_mem_alua_state) {
2107 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2108 state = 'O';
2109 break;
2110 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2111 state = 'A';
2112 break;
2113 case ALUA_ACCESS_STATE_STANDBY:
2114 state = 'S';
2115 break;
2116 case ALUA_ACCESS_STATE_UNAVAILABLE:
2117 state = 'U';
2118 break;
2119 default:
2120 state = '.';
2121 break;
2122 }
2123 bl += sprintf(b + bl, " %d:%c",
2124 mem->lba_map_mem_alua_pg_id, state);
2125 }
2126 bl += sprintf(b + bl, "\n");
2127 }
2128 spin_unlock(&dev->t10_alua.lba_map_lock);
2129 return bl;
2130}
2131
2132static ssize_t target_core_store_dev_lba_map(
2133 void *p,
2134 const char *page,
2135 size_t count)
2136{
2137 struct se_device *dev = p;
2138 struct t10_alua_lba_map *lba_map = NULL;
2139 struct list_head lba_list;
2140 char *map_entries, *ptr;
2141 char state;
2142 int pg_num = -1, pg;
2143 int ret = 0, num = 0, pg_id, alua_state;
2144 unsigned long start_lba = -1, end_lba = -1;
2145 unsigned long segment_size = -1, segment_mult = -1;
2146
2147 map_entries = kstrdup(page, GFP_KERNEL);
2148 if (!map_entries)
2149 return -ENOMEM;
2150
2151 INIT_LIST_HEAD(&lba_list);
2152 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2153 if (!*ptr)
2154 continue;
2155
2156 if (num == 0) {
2157 if (sscanf(ptr, "%lu %lu\n",
2158 &segment_size, &segment_mult) != 2) {
2159 pr_err("Invalid line %d\n", num);
2160 ret = -EINVAL;
2161 break;
2162 }
2163 num++;
2164 continue;
2165 }
2166 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2167 pr_err("Invalid line %d\n", num);
2168 ret = -EINVAL;
2169 break;
2170 }
2171 ptr = strchr(ptr, ' ');
2172 if (!ptr) {
2173 pr_err("Invalid line %d, missing end lba\n", num);
2174 ret = -EINVAL;
2175 break;
2176 }
2177 ptr++;
2178 ptr = strchr(ptr, ' ');
2179 if (!ptr) {
2180 pr_err("Invalid line %d, missing state definitions\n",
2181 num);
2182 ret = -EINVAL;
2183 break;
2184 }
2185 ptr++;
2186 lba_map = core_alua_allocate_lba_map(&lba_list,
2187 start_lba, end_lba);
2188 if (IS_ERR(lba_map)) {
2189 ret = PTR_ERR(lba_map);
2190 break;
2191 }
2192 pg = 0;
2193 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2194 switch (state) {
2195 case 'O':
2196 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2197 break;
2198 case 'A':
2199 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2200 break;
2201 case 'S':
2202 alua_state = ALUA_ACCESS_STATE_STANDBY;
2203 break;
2204 case 'U':
2205 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2206 break;
2207 default:
2208 pr_err("Invalid ALUA state '%c'\n", state);
2209 ret = -EINVAL;
2210 goto out;
2211 }
2212
2213 ret = core_alua_allocate_lba_map_mem(lba_map,
2214 pg_id, alua_state);
2215 if (ret) {
2216 pr_err("Invalid target descriptor %d:%c "
2217 "at line %d\n",
2218 pg_id, state, num);
2219 break;
2220 }
2221 pg++;
2222 ptr = strchr(ptr, ' ');
2223 if (ptr)
2224 ptr++;
2225 else
2226 break;
2227 }
2228 if (pg_num == -1)
2229 pg_num = pg;
2230 else if (pg != pg_num) {
2231 pr_err("Only %d from %d port groups definitions "
2232 "at line %d\n", pg, pg_num, num);
2233 ret = -EINVAL;
2234 break;
2235 }
2236 num++;
2237 }
2238out:
2239 if (ret) {
2240 core_alua_free_lba_map(&lba_list);
2241 count = ret;
2242 } else
2243 core_alua_set_lba_map(dev, &lba_list,
2244 segment_size, segment_mult);
2245 kfree(map_entries);
2246 return count;
2247}
2248
2249static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
2250 .attr = { .ca_owner = THIS_MODULE,
2251 .ca_name = "lba_map",
2252 .ca_mode = S_IRUGO | S_IWUSR },
2253 .show = target_core_show_dev_lba_map,
2254 .store = target_core_store_dev_lba_map,
2255};
2256
73112edc 2257static struct configfs_attribute *target_core_dev_attrs[] = {
c66ac9db
NB		 2258 &target_core_attr_dev_info.attr,
2259 &target_core_attr_dev_control.attr,
2260 &target_core_attr_dev_alias.attr,
2261 &target_core_attr_dev_udev_path.attr,
2262 &target_core_attr_dev_enable.attr,
2263 &target_core_attr_dev_alua_lu_gp.attr,
229d4f11 2264 &target_core_attr_dev_lba_map.attr,
c66ac9db
NB		 2265 NULL,
2266};
2267
2268static void target_core_dev_release(struct config_item *item)
2269{
0fd97ccf
CH		 2270 struct config_group *dev_cg = to_config_group(item);
2271 struct se_device *dev =
2272 container_of(dev_cg, struct se_device, dev_group);
c66ac9db 2273
c66ac9db 2274 kfree(dev_cg->default_groups);
0fd97ccf 2275 target_free_device(dev);
c66ac9db
NB		 2276}
2277
2278static ssize_t target_core_dev_show(struct config_item *item,
2279 struct configfs_attribute *attr,
2280 char *page)
2281{
0fd97ccf
CH		 2282 struct config_group *dev_cg = to_config_group(item);
2283 struct se_device *dev =
2284 container_of(dev_cg, struct se_device, dev_group);
c66ac9db
NB		 2285 struct target_core_configfs_attribute *tc_attr = container_of(
2286 attr, struct target_core_configfs_attribute, attr);
2287
6708bb27 2288 if (!tc_attr->show)
c66ac9db
NB		 2289 return -EINVAL;
2290
0fd97ccf 2291 return tc_attr->show(dev, page);
c66ac9db
NB		 2292}
2293
2294static ssize_t target_core_dev_store(struct config_item *item,
2295 struct configfs_attribute *attr,
2296 const char *page, size_t count)
2297{
0fd97ccf
CH		 2298 struct config_group *dev_cg = to_config_group(item);
2299 struct se_device *dev =
2300 container_of(dev_cg, struct se_device, dev_group);
c66ac9db
NB		 2301 struct target_core_configfs_attribute *tc_attr = container_of(
2302 attr, struct target_core_configfs_attribute, attr);
2303
6708bb27 2304 if (!tc_attr->store)
c66ac9db
NB		 2305 return -EINVAL;
2306
0fd97ccf 2307 return tc_attr->store(dev, page, count);
c66ac9db
NB		 2308}
2309
2310static struct configfs_item_operations target_core_dev_item_ops = {
2311 .release = target_core_dev_release,
2312 .show_attribute = target_core_dev_show,
2313 .store_attribute = target_core_dev_store,
2314};
2315
73112edc 2316TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
c66ac9db 2317
73112edc 2318/* End functions for struct config_item_type tb_dev_cit */
c66ac9db
NB		 2319
2320/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2321
2322CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2323#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2324static struct target_core_alua_lu_gp_attribute \
2325 target_core_alua_lu_gp_##_name = \
2326 __CONFIGFS_EATTR(_name, _mode, \
2327 target_core_alua_lu_gp_show_attr_##_name, \
2328 target_core_alua_lu_gp_store_attr_##_name);
2329
2330#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2331static struct target_core_alua_lu_gp_attribute \
2332 target_core_alua_lu_gp_##_name = \
2333 __CONFIGFS_EATTR_RO(_name, \
2334 target_core_alua_lu_gp_show_attr_##_name);
2335
2336/*
2337 * lu_gp_id
2338 */
2339static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2340 struct t10_alua_lu_gp *lu_gp,
2341 char *page)
2342{
6708bb27 2343 if (!lu_gp->lu_gp_valid_id)
c66ac9db
NB		 2344 return 0;
2345
2346 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2347}
2348
2349static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2350 struct t10_alua_lu_gp *lu_gp,
2351 const char *page,
2352 size_t count)
2353{
2354 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2355 unsigned long lu_gp_id;
2356 int ret;
2357
57103d7f 2358 ret = kstrtoul(page, 0, &lu_gp_id);
c66ac9db 2359 if (ret < 0) {
57103d7f 2360 pr_err("kstrtoul() returned %d for"
c66ac9db 2361 " lu_gp_id\n", ret);
57103d7f 2362 return ret;
c66ac9db
NB		 2363 }
2364 if (lu_gp_id > 0x0000ffff) {
6708bb27 2365 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2366 " 0x0000ffff\n", lu_gp_id);
2367 return -EINVAL;
2368 }
2369
2370 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2371 if (ret < 0)
2372 return -EINVAL;
2373
6708bb27 2374 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
c66ac9db
NB		 2375 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2376 config_item_name(&alua_lu_gp_cg->cg_item),
2377 lu_gp->lu_gp_id);
2378
2379 return count;
2380}
2381
2382SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2383
2384/*
2385 * members
2386 */
2387static ssize_t target_core_alua_lu_gp_show_attr_members(
2388 struct t10_alua_lu_gp *lu_gp,
2389 char *page)
2390{
2391 struct se_device *dev;
2392 struct se_hba *hba;
c66ac9db
NB		 2393 struct t10_alua_lu_gp_member *lu_gp_mem;
2394 ssize_t len = 0, cur_len;
2395 unsigned char buf[LU_GROUP_NAME_BUF];
2396
2397 memset(buf, 0, LU_GROUP_NAME_BUF);
2398
2399 spin_lock(&lu_gp->lu_gp_lock);
2400 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2401 dev = lu_gp_mem->lu_gp_mem_dev;
0fd97ccf 2402 hba = dev->se_hba;
c66ac9db
NB		 2403
2404 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2405 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 2406 config_item_name(&dev->dev_group.cg_item));
c66ac9db
NB		 2407 cur_len++; /* Extra byte for NULL terminator */
2408
2409 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2410 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2411 "_members buffer\n");
2412 break;
2413 }
2414 memcpy(page+len, buf, cur_len);
2415 len += cur_len;
2416 }
2417 spin_unlock(&lu_gp->lu_gp_lock);
2418
2419 return len;
2420}
2421
2422SE_DEV_ALUA_LU_ATTR_RO(members);
2423
2424CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2425
2426static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2427 &target_core_alua_lu_gp_lu_gp_id.attr,
2428 &target_core_alua_lu_gp_members.attr,
2429 NULL,
2430};
2431
1f6fe7cb
NB		 2432static void target_core_alua_lu_gp_release(struct config_item *item)
2433{
2434 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2435 struct t10_alua_lu_gp, lu_gp_group);
2436
2437 core_alua_free_lu_gp(lu_gp);
2438}
2439
c66ac9db 2440static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1f6fe7cb 2441 .release = target_core_alua_lu_gp_release,
c66ac9db
NB		 2442 .show_attribute = target_core_alua_lu_gp_attr_show,
2443 .store_attribute = target_core_alua_lu_gp_attr_store,
2444};
2445
2446static struct config_item_type target_core_alua_lu_gp_cit = {
2447 .ct_item_ops = &target_core_alua_lu_gp_ops,
2448 .ct_attrs = target_core_alua_lu_gp_attrs,
2449 .ct_owner = THIS_MODULE,
2450};
2451
2452/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2453
2454/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2455
2456static struct config_group *target_core_alua_create_lu_gp(
2457 struct config_group *group,
2458 const char *name)
2459{
2460 struct t10_alua_lu_gp *lu_gp;
2461 struct config_group *alua_lu_gp_cg = NULL;
2462 struct config_item *alua_lu_gp_ci = NULL;
2463
2464 lu_gp = core_alua_allocate_lu_gp(name, 0);
2465 if (IS_ERR(lu_gp))
2466 return NULL;
2467
2468 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2469 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2470
2471 config_group_init_type_name(alua_lu_gp_cg, name,
2472 &target_core_alua_lu_gp_cit);
2473
6708bb27 2474 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
c66ac9db
NB		 2475 " Group: core/alua/lu_gps/%s\n",
2476 config_item_name(alua_lu_gp_ci));
2477
2478 return alua_lu_gp_cg;
2479
2480}
2481
2482static void target_core_alua_drop_lu_gp(
2483 struct config_group *group,
2484 struct config_item *item)
2485{
2486 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2487 struct t10_alua_lu_gp, lu_gp_group);
2488
6708bb27 2489 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
c66ac9db
NB		 2490 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2491 config_item_name(item), lu_gp->lu_gp_id);
1f6fe7cb
NB		 2492 /*
2493 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2494 * -> target_core_alua_lu_gp_release()
2495 */
c66ac9db 2496 config_item_put(item);
c66ac9db
NB		 2497}
2498
2499static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2500 .make_group = &target_core_alua_create_lu_gp,
2501 .drop_item = &target_core_alua_drop_lu_gp,
2502};
2503
2504static struct config_item_type target_core_alua_lu_gps_cit = {
2505 .ct_item_ops = NULL,
2506 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2507 .ct_owner = THIS_MODULE,
2508};
2509
2510/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2511
2512/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2513
2514CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2515#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2516static struct target_core_alua_tg_pt_gp_attribute \
2517 target_core_alua_tg_pt_gp_##_name = \
2518 __CONFIGFS_EATTR(_name, _mode, \
2519 target_core_alua_tg_pt_gp_show_attr_##_name, \
2520 target_core_alua_tg_pt_gp_store_attr_##_name);
2521
2522#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2523static struct target_core_alua_tg_pt_gp_attribute \
2524 target_core_alua_tg_pt_gp_##_name = \
2525 __CONFIGFS_EATTR_RO(_name, \
2526 target_core_alua_tg_pt_gp_show_attr_##_name);
2527
2528/*
2529 * alua_access_state
2530 */
2531static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2532 struct t10_alua_tg_pt_gp *tg_pt_gp,
2533 char *page)
2534{
2535 return sprintf(page, "%d\n",
2536 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2537}
2538
2539static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2540 struct t10_alua_tg_pt_gp *tg_pt_gp,
2541 const char *page,
2542 size_t count)
2543{
0fd97ccf 2544 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
c66ac9db
NB		 2545 unsigned long tmp;
2546 int new_state, ret;
2547
6708bb27 2548 if (!tg_pt_gp->tg_pt_gp_valid_id) {
125d0119 2549 pr_err("Unable to do implicit ALUA on non valid"
c66ac9db
NB		 2550 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2551 return -EINVAL;
2552 }
f1453773
NB		 2553 if (!(dev->dev_flags & DF_CONFIGURED)) {
2554 pr_err("Unable to set alua_access_state while device is"
2555 " not configured\n");
2556 return -ENODEV;
2557 }
c66ac9db 2558
57103d7f 2559 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2560 if (ret < 0) {
6708bb27 2561 pr_err("Unable to extract new ALUA access state from"
c66ac9db 2562 " %s\n", page);
57103d7f 2563 return ret;
c66ac9db
NB		 2564 }
2565 new_state = (int)tmp;
2566
125d0119
HR		 2567 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2568 pr_err("Unable to process implicit configfs ALUA"
2569 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
c66ac9db
NB		 2570 return -EINVAL;
2571 }
c66094bf
HR		 2572 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2573 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2574 /* LBA DEPENDENT is only allowed with implicit ALUA */
2575 pr_err("Unable to process implicit configfs ALUA transition"
2576 " while explicit ALUA management is enabled\n");
2577 return -EINVAL;
2578 }
c66ac9db 2579
0fd97ccf 2580 ret = core_alua_do_port_transition(tg_pt_gp, dev,
c66ac9db
NB		 2581 NULL, NULL, new_state, 0);
2582 return (!ret) ? count : -EINVAL;
2583}
2584
2585SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2586
2587/*
2588 * alua_access_status
2589 */
2590static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2591 struct t10_alua_tg_pt_gp *tg_pt_gp,
2592 char *page)
2593{
2594 return sprintf(page, "%s\n",
2595 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2596}
2597
2598static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2599 struct t10_alua_tg_pt_gp *tg_pt_gp,
2600 const char *page,
2601 size_t count)
2602{
2603 unsigned long tmp;
2604 int new_status, ret;
2605
6708bb27
AG		 2606 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2607 pr_err("Unable to do set ALUA access status on non"
c66ac9db
NB		 2608 " valid tg_pt_gp ID: %hu\n",
2609 tg_pt_gp->tg_pt_gp_valid_id);
2610 return -EINVAL;
2611 }
2612
57103d7f 2613 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2614 if (ret < 0) {
6708bb27 2615 pr_err("Unable to extract new ALUA access status"
c66ac9db 2616 " from %s\n", page);
57103d7f 2617 return ret;
c66ac9db
NB		 2618 }
2619 new_status = (int)tmp;
2620
2621 if ((new_status != ALUA_STATUS_NONE) &&
125d0119
HR		 2622 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2623 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
6708bb27 2624 pr_err("Illegal ALUA access status: 0x%02x\n",
c66ac9db
NB		 2625 new_status);
2626 return -EINVAL;
2627 }
2628
2629 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2630 return count;
2631}
2632
2633SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2634
2635/*
2636 * alua_access_type
2637 */
2638static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2639 struct t10_alua_tg_pt_gp *tg_pt_gp,
2640 char *page)
2641{
2642 return core_alua_show_access_type(tg_pt_gp, page);
2643}
2644
2645static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2646 struct t10_alua_tg_pt_gp *tg_pt_gp,
2647 const char *page,
2648 size_t count)
2649{
2650 return core_alua_store_access_type(tg_pt_gp, page, count);
2651}
2652
2653SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2654
6be526c4
HR		 2655/*
2656 * alua_supported_states
2657 */
6be526c4 2658
b0a382c5
HR		 2659#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2660static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2661 struct t10_alua_tg_pt_gp *t, char *p) \
2662{ \
2663 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
6be526c4
HR		 2664}
2665
b0a382c5
HR		 2666#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2667static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2668 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2669{ \
2670 unsigned long tmp; \
2671 int ret; \
2672 \
2673 if (!t->tg_pt_gp_valid_id) { \
2674 pr_err("Unable to do set ##_name ALUA state on non" \
2675 " valid tg_pt_gp ID: %hu\n", \
2676 t->tg_pt_gp_valid_id); \
2677 return -EINVAL; \
2678 } \
2679 \
2680 ret = kstrtoul(p, 0, &tmp); \
2681 if (ret < 0) { \
2682 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2683 return -EINVAL; \
2684 } \
2685 if (tmp > 1) { \
2686 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2687 return -EINVAL; \
2688 } \
1f0b030c 2689 if (tmp) \
b0a382c5
HR		 2690 t->_var |= _bit; \
2691 else \
2692 t->_var &= ~_bit; \
2693 \
2694 return c; \
2695}
2696
2697SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2698 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2699SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2700 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2701SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2702
2703SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2704 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2705SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2706 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2707SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2708
2709SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2710 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2711SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2712 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
c66094bf 2713SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
b0a382c5
HR		 2714
2715SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2716 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2717SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2718 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2719SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2720
2721SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2722 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2723SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2724 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2725SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2726
2727SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2728 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2729SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2730 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2731SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2732
2733SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2734 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2735SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2736 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2737SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
6be526c4 2738
c66ac9db
NB		 2739/*
2740 * alua_write_metadata
2741 */
2742static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2743 struct t10_alua_tg_pt_gp *tg_pt_gp,
2744 char *page)
2745{
2746 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2747}
2748
2749static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2750 struct t10_alua_tg_pt_gp *tg_pt_gp,
2751 const char *page,
2752 size_t count)
2753{
2754 unsigned long tmp;
2755 int ret;
2756
57103d7f 2757 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2758 if (ret < 0) {
6708bb27 2759 pr_err("Unable to extract alua_write_metadata\n");
57103d7f 2760 return ret;
c66ac9db
NB		 2761 }
2762
2763 if ((tmp != 0) && (tmp != 1)) {
6708bb27 2764 pr_err("Illegal value for alua_write_metadata:"
c66ac9db
NB		 2765 " %lu\n", tmp);
2766 return -EINVAL;
2767 }
2768 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2769
2770 return count;
2771}
2772
2773SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2774
2775
2776
2777/*
2778 * nonop_delay_msecs
2779 */
2780static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2781 struct t10_alua_tg_pt_gp *tg_pt_gp,
2782 char *page)
2783{
2784 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2785
2786}
2787
2788static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2789 struct t10_alua_tg_pt_gp *tg_pt_gp,
2790 const char *page,
2791 size_t count)
2792{
2793 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2794}
2795
2796SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2797
2798/*
2799 * trans_delay_msecs
2800 */
2801static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2802 struct t10_alua_tg_pt_gp *tg_pt_gp,
2803 char *page)
2804{
2805 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2806}
2807
2808static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2809 struct t10_alua_tg_pt_gp *tg_pt_gp,
2810 const char *page,
2811 size_t count)
2812{
2813 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2814}
2815
2816SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2817
5b9a4d72 2818/*
125d0119 2819 * implicit_trans_secs
5b9a4d72 2820 */
125d0119 2821static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
5b9a4d72
NB		 2822 struct t10_alua_tg_pt_gp *tg_pt_gp,
2823 char *page)
2824{
125d0119 2825 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
5b9a4d72
NB		 2826}
2827
125d0119 2828static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
5b9a4d72
NB		 2829 struct t10_alua_tg_pt_gp *tg_pt_gp,
2830 const char *page,
2831 size_t count)
2832{
125d0119 2833 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
5b9a4d72
NB		 2834}
2835
125d0119 2836SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
5b9a4d72 2837
c66ac9db
NB		 2838/*
2839 * preferred
2840 */
2841
2842static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2843 struct t10_alua_tg_pt_gp *tg_pt_gp,
2844 char *page)
2845{
2846 return core_alua_show_preferred_bit(tg_pt_gp, page);
2847}
2848
2849static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2850 struct t10_alua_tg_pt_gp *tg_pt_gp,
2851 const char *page,
2852 size_t count)
2853{
2854 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2855}
2856
2857SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2858
2859/*
2860 * tg_pt_gp_id
2861 */
2862static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2863 struct t10_alua_tg_pt_gp *tg_pt_gp,
2864 char *page)
2865{
6708bb27 2866 if (!tg_pt_gp->tg_pt_gp_valid_id)
c66ac9db
NB		 2867 return 0;
2868
2869 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2870}
2871
2872static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2873 struct t10_alua_tg_pt_gp *tg_pt_gp,
2874 const char *page,
2875 size_t count)
2876{
2877 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2878 unsigned long tg_pt_gp_id;
2879 int ret;
2880
57103d7f 2881 ret = kstrtoul(page, 0, &tg_pt_gp_id);
c66ac9db 2882 if (ret < 0) {
57103d7f 2883 pr_err("kstrtoul() returned %d for"
c66ac9db 2884 " tg_pt_gp_id\n", ret);
57103d7f 2885 return ret;
c66ac9db
NB		 2886 }
2887 if (tg_pt_gp_id > 0x0000ffff) {
6708bb27 2888 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2889 " 0x0000ffff\n", tg_pt_gp_id);
2890 return -EINVAL;
2891 }
2892
2893 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2894 if (ret < 0)
2895 return -EINVAL;
2896
6708bb27 2897 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
c66ac9db
NB		 2898 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2899 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2900 tg_pt_gp->tg_pt_gp_id);
2901
2902 return count;
2903}
2904
2905SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2906
2907/*
2908 * members
2909 */
2910static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2911 struct t10_alua_tg_pt_gp *tg_pt_gp,
2912 char *page)
2913{
c66ac9db 2914 struct se_lun *lun;
c66ac9db
NB		 2915 ssize_t len = 0, cur_len;
2916 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2917
2918 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2919
2920 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
adf653f9
CH		 2921 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2922 lun_tg_pt_gp_link) {
2923 struct se_portal_group *tpg = lun->lun_tpg;
c66ac9db
NB		 2924
2925 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
e3d6f909
AG		 2926 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2927 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2928 tpg->se_tpg_tfo->tpg_get_tag(tpg),
c66ac9db
NB		 2929 config_item_name(&lun->lun_group.cg_item));
2930 cur_len++; /* Extra byte for NULL terminator */
2931
2932 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2933 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2934 "_members buffer\n");
2935 break;
2936 }
2937 memcpy(page+len, buf, cur_len);
2938 len += cur_len;
2939 }
2940 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2941
2942 return len;
2943}
2944
2945SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2946
2947CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2948 tg_pt_gp_group);
2949
2950static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2951 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2952 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2953 &target_core_alua_tg_pt_gp_alua_access_type.attr,
b0a382c5
HR		 2954 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2955 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2956 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2957 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2958 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2959 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2960 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
c66ac9db
NB		 2961 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2962 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2963 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
125d0119 2964 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
c66ac9db
NB		 2965 &target_core_alua_tg_pt_gp_preferred.attr,
2966 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2967 &target_core_alua_tg_pt_gp_members.attr,
2968 NULL,
2969};
2970
1f6fe7cb
NB		 2971static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2972{
2973 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2974 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2975
2976 core_alua_free_tg_pt_gp(tg_pt_gp);
2977}
2978
c66ac9db 2979static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
1f6fe7cb 2980 .release = target_core_alua_tg_pt_gp_release,
c66ac9db
NB		 2981 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2982 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2983};
2984
2985static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2986 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2987 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2988 .ct_owner = THIS_MODULE,
2989};
2990
2991/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2992
72aca57b 2993/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
c66ac9db
NB		 2994
2995static struct config_group *target_core_alua_create_tg_pt_gp(
2996 struct config_group *group,
2997 const char *name)
2998{
2999 struct t10_alua *alua = container_of(group, struct t10_alua,
3000 alua_tg_pt_gps_group);
3001 struct t10_alua_tg_pt_gp *tg_pt_gp;
c66ac9db
NB		 3002 struct config_group *alua_tg_pt_gp_cg = NULL;
3003 struct config_item *alua_tg_pt_gp_ci = NULL;
3004
0fd97ccf 3005 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
6708bb27 3006 if (!tg_pt_gp)
c66ac9db
NB		 3007 return NULL;
3008
3009 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3010 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3011
3012 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3013 &target_core_alua_tg_pt_gp_cit);
3014
6708bb27 3015 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
c66ac9db
NB		 3016 " Group: alua/tg_pt_gps/%s\n",
3017 config_item_name(alua_tg_pt_gp_ci));
3018
3019 return alua_tg_pt_gp_cg;
3020}
3021
3022static void target_core_alua_drop_tg_pt_gp(
3023 struct config_group *group,
3024 struct config_item *item)
3025{
3026 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3027 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3028
6708bb27 3029 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
c66ac9db
NB		 3030 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3031 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
1f6fe7cb
NB		 3032 /*
3033 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3034 * -> target_core_alua_tg_pt_gp_release().
3035 */
c66ac9db 3036 config_item_put(item);
c66ac9db
NB		 3037}
3038
3039static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3040 .make_group = &target_core_alua_create_tg_pt_gp,
3041 .drop_item = &target_core_alua_drop_tg_pt_gp,
3042};
3043
72aca57b 3044TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
c66ac9db 3045
72aca57b 3046/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
c66ac9db
NB		 3047
3048/* Start functions for struct config_item_type target_core_alua_cit */
3049
3050/*
3051 * target_core_alua_cit is a ConfigFS group that lives under
3052 * /sys/kernel/config/target/core/alua. There are default groups
3053 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3054 * target_core_alua_cit in target_core_init_configfs() below.
3055 */
3056static struct config_item_type target_core_alua_cit = {
3057 .ct_item_ops = NULL,
3058 .ct_attrs = NULL,
3059 .ct_owner = THIS_MODULE,
3060};
3061
3062/* End functions for struct config_item_type target_core_alua_cit */
3063
d23ab570 3064/* Start functions for struct config_item_type tb_dev_stat_cit */
12d23384
NB		 3065
3066static struct config_group *target_core_stat_mkdir(
3067 struct config_group *group,
3068 const char *name)
3069{
3070 return ERR_PTR(-ENOSYS);
3071}
3072
3073static void target_core_stat_rmdir(
3074 struct config_group *group,
3075 struct config_item *item)
3076{
3077 return;
3078}
3079
3080static struct configfs_group_operations target_core_stat_group_ops = {
3081 .make_group = &target_core_stat_mkdir,
3082 .drop_item = &target_core_stat_rmdir,
3083};
3084
d23ab570 3085TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
12d23384 3086
d23ab570 3087/* End functions for struct config_item_type tb_dev_stat_cit */
12d23384 3088
c66ac9db
NB		 3089/* Start functions for struct config_item_type target_core_hba_cit */
3090
3091static struct config_group *target_core_make_subdev(
3092 struct config_group *group,
3093 const char *name)
3094{
3095 struct t10_alua_tg_pt_gp *tg_pt_gp;
c66ac9db
NB		 3096 struct config_item *hba_ci = &group->cg_item;
3097 struct se_hba *hba = item_to_hba(hba_ci);
0a06d430 3098 struct target_backend *tb = hba->backend;
0fd97ccf 3099 struct se_device *dev;
c66ac9db 3100 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
12d23384
NB		 3101 struct config_group *dev_stat_grp = NULL;
3102 int errno = -ENOMEM, ret;
c66ac9db 3103
12d23384
NB		 3104 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3105 if (ret)
3106 return ERR_PTR(ret);
c66ac9db 3107
0fd97ccf
CH		 3108 dev = target_alloc_device(hba, name);
3109 if (!dev)
3110 goto out_unlock;
3111
3112 dev_cg = &dev->dev_group;
c66ac9db 3113
13f6a914 3114 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
c66ac9db 3115 GFP_KERNEL);
6708bb27 3116 if (!dev_cg->default_groups)
0fd97ccf 3117 goto out_free_device;
c66ac9db 3118
0a06d430 3119 config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
0fd97ccf 3120 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
0a06d430 3121 &tb->tb_dev_attrib_cit);
0fd97ccf 3122 config_group_init_type_name(&dev->dev_pr_group, "pr",
0a06d430 3123 &tb->tb_dev_pr_cit);
0fd97ccf 3124 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
0a06d430 3125 &tb->tb_dev_wwn_cit);
0fd97ccf 3126 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
0a06d430 3127 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
0fd97ccf 3128 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
0a06d430 3129 "statistics", &tb->tb_dev_stat_cit);
12d23384 3130
0fd97ccf
CH		 3131 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
3132 dev_cg->default_groups[1] = &dev->dev_pr_group;
3133 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
3134 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
3135 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
12d23384 3136 dev_cg->default_groups[5] = NULL;
c66ac9db 3137 /*
12d23384 3138 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
c66ac9db 3139 */
0fd97ccf 3140 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
6708bb27 3141 if (!tg_pt_gp)
0fd97ccf
CH		 3142 goto out_free_dev_cg_default_groups;
3143 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
c66ac9db 3144
0fd97ccf 3145 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
13f6a914 3146 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 3147 GFP_KERNEL);
6708bb27
AG		 3148 if (!tg_pt_gp_cg->default_groups) {
3149 pr_err("Unable to allocate tg_pt_gp_cg->"
c66ac9db 3150 "default_groups\n");
0fd97ccf 3151 goto out_free_tg_pt_gp;
c66ac9db
NB		 3152 }
3153
3154 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3155 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3156 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
3157 tg_pt_gp_cg->default_groups[1] = NULL;
12d23384
NB		 3158 /*
3159 * Add core/$HBA/$DEV/statistics/ default groups
3160 */
0fd97ccf 3161 dev_stat_grp = &dev->dev_stat_grps.stat_group;
13f6a914 3162 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
12d23384
NB		 3163 GFP_KERNEL);
3164 if (!dev_stat_grp->default_groups) {
6708bb27 3165 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
0fd97ccf 3166 goto out_free_tg_pt_gp_cg_default_groups;
12d23384 3167 }
0fd97ccf 3168 target_stat_setup_dev_default_groups(dev);
c66ac9db
NB		 3169
3170 mutex_unlock(&hba->hba_access_mutex);
0fd97ccf
CH		 3171 return dev_cg;
3172
3173out_free_tg_pt_gp_cg_default_groups:
3174 kfree(tg_pt_gp_cg->default_groups);
3175out_free_tg_pt_gp:
3176 core_alua_free_tg_pt_gp(tg_pt_gp);
3177out_free_dev_cg_default_groups:
3178 kfree(dev_cg->default_groups);
3179out_free_device:
3180 target_free_device(dev);
3181out_unlock:
c66ac9db 3182 mutex_unlock(&hba->hba_access_mutex);
12d23384 3183 return ERR_PTR(errno);
c66ac9db
NB		 3184}
3185
3186static void target_core_drop_subdev(
3187 struct config_group *group,
3188 struct config_item *item)
3189{
0fd97ccf
CH		 3190 struct config_group *dev_cg = to_config_group(item);
3191 struct se_device *dev =
3192 container_of(dev_cg, struct se_device, dev_group);
c66ac9db 3193 struct se_hba *hba;
c66ac9db 3194 struct config_item *df_item;
0fd97ccf 3195 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
1f6fe7cb 3196 int i;
c66ac9db 3197
0fd97ccf 3198 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
c66ac9db 3199
1f6fe7cb 3200 mutex_lock(&hba->hba_access_mutex);
c66ac9db 3201
0fd97ccf 3202 dev_stat_grp = &dev->dev_stat_grps.stat_group;
12d23384
NB		 3203 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
3204 df_item = &dev_stat_grp->default_groups[i]->cg_item;
3205 dev_stat_grp->default_groups[i] = NULL;
3206 config_item_put(df_item);
3207 }
3208 kfree(dev_stat_grp->default_groups);
3209
0fd97ccf 3210 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 3211 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
3212 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
3213 tg_pt_gp_cg->default_groups[i] = NULL;
3214 config_item_put(df_item);
3215 }
3216 kfree(tg_pt_gp_cg->default_groups);
1f6fe7cb
NB		 3217 /*
3218 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3219 * directly from target_core_alua_tg_pt_gp_release().
3220 */
0fd97ccf 3221 dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db 3222
c66ac9db
NB		 3223 for (i = 0; dev_cg->default_groups[i]; i++) {
3224 df_item = &dev_cg->default_groups[i]->cg_item;
3225 dev_cg->default_groups[i] = NULL;
3226 config_item_put(df_item);
3227 }
c66ac9db 3228 /*
0fd97ccf 3229 * se_dev is released from target_core_dev_item_ops->release()
c66ac9db 3230 */
1f6fe7cb 3231 config_item_put(item);
c66ac9db 3232 mutex_unlock(&hba->hba_access_mutex);
c66ac9db
NB		 3233}
3234
3235static struct configfs_group_operations target_core_hba_group_ops = {
3236 .make_group = target_core_make_subdev,
3237 .drop_item = target_core_drop_subdev,
3238};
3239
3240CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
3241#define SE_HBA_ATTR(_name, _mode) \
3242static struct target_core_hba_attribute \
3243 target_core_hba_##_name = \
3244 __CONFIGFS_EATTR(_name, _mode, \
3245 target_core_hba_show_attr_##_name, \
3246 target_core_hba_store_attr_##_name);
3247
3248#define SE_HBA_ATTR_RO(_name) \
3249static struct target_core_hba_attribute \
3250 target_core_hba_##_name = \
3251 __CONFIGFS_EATTR_RO(_name, \
3252 target_core_hba_show_attr_##_name);
3253
3254static ssize_t target_core_hba_show_attr_hba_info(
3255 struct se_hba *hba,
3256 char *page)
3257{
3258 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
0a06d430 3259 hba->hba_id, hba->backend->ops->name,
ce8dd25d 3260 TARGET_CORE_VERSION);
c66ac9db
NB		 3261}
3262
3263SE_HBA_ATTR_RO(hba_info);
3264
3265static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
3266 char *page)
3267{
3268 int hba_mode = 0;
3269
3270 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3271 hba_mode = 1;
3272
3273 return sprintf(page, "%d\n", hba_mode);
3274}
3275
3276static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
3277 const char *page, size_t count)
3278{
c66ac9db
NB		 3279 unsigned long mode_flag;
3280 int ret;
3281
0a06d430 3282 if (hba->backend->ops->pmode_enable_hba == NULL)
c66ac9db
NB		 3283 return -EINVAL;
3284
57103d7f 3285 ret = kstrtoul(page, 0, &mode_flag);
c66ac9db 3286 if (ret < 0) {
6708bb27 3287 pr_err("Unable to extract hba mode flag: %d\n", ret);
57103d7f 3288 return ret;
c66ac9db
NB		 3289 }
3290
0fd97ccf 3291 if (hba->dev_count) {
6708bb27 3292 pr_err("Unable to set hba_mode with active devices\n");
c66ac9db
NB		 3293 return -EINVAL;
3294 }
c66ac9db 3295
0a06d430 3296 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
c66ac9db
NB		 3297 if (ret < 0)
3298 return -EINVAL;
3299 if (ret > 0)
3300 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3301 else if (ret == 0)
3302 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3303
3304 return count;
3305}
3306
3307SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3308
3309CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3310
1f6fe7cb
NB		 3311static void target_core_hba_release(struct config_item *item)
3312{
3313 struct se_hba *hba = container_of(to_config_group(item),
3314 struct se_hba, hba_group);
3315 core_delete_hba(hba);
3316}
3317
c66ac9db
NB		 3318static struct configfs_attribute *target_core_hba_attrs[] = {
3319 &target_core_hba_hba_info.attr,
3320 &target_core_hba_hba_mode.attr,
3321 NULL,
3322};
3323
3324static struct configfs_item_operations target_core_hba_item_ops = {
1f6fe7cb 3325 .release = target_core_hba_release,
c66ac9db
NB		 3326 .show_attribute = target_core_hba_attr_show,
3327 .store_attribute = target_core_hba_attr_store,
3328};
3329
3330static struct config_item_type target_core_hba_cit = {
3331 .ct_item_ops = &target_core_hba_item_ops,
3332 .ct_group_ops = &target_core_hba_group_ops,
3333 .ct_attrs = target_core_hba_attrs,
3334 .ct_owner = THIS_MODULE,
3335};
3336
3337static struct config_group *target_core_call_addhbatotarget(
3338 struct config_group *group,
3339 const char *name)
3340{
3341 char *se_plugin_str, *str, *str2;
3342 struct se_hba *hba;
3343 char buf[TARGET_CORE_NAME_MAX_LEN];
3344 unsigned long plugin_dep_id = 0;
3345 int ret;
3346
3347 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
60d645a4 3348 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
6708bb27 3349 pr_err("Passed *name strlen(): %d exceeds"
c66ac9db
NB		 3350 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3351 TARGET_CORE_NAME_MAX_LEN);
3352 return ERR_PTR(-ENAMETOOLONG);
3353 }
3354 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3355
3356 str = strstr(buf, "_");
6708bb27
AG		 3357 if (!str) {
3358 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
c66ac9db
NB		 3359 return ERR_PTR(-EINVAL);
3360 }
3361 se_plugin_str = buf;
3362 /*
3363 * Special case for subsystem plugins that have "_" in their names.
3364 * Namely rd_direct and rd_mcp..
3365 */
3366 str2 = strstr(str+1, "_");
6708bb27 3367 if (str2) {
c66ac9db
NB		 3368 *str2 = '\0'; /* Terminate for *se_plugin_str */
3369 str2++; /* Skip to start of plugin dependent ID */
3370 str = str2;
3371 } else {
3372 *str = '\0'; /* Terminate for *se_plugin_str */
3373 str++; /* Skip to start of plugin dependent ID */
3374 }
3375
57103d7f 3376 ret = kstrtoul(str, 0, &plugin_dep_id);
c66ac9db 3377 if (ret < 0) {
57103d7f 3378 pr_err("kstrtoul() returned %d for"
c66ac9db 3379 " plugin_dep_id\n", ret);
57103d7f 3380 return ERR_PTR(ret);
c66ac9db
NB		 3381 }
3382 /*
3383 * Load up TCM subsystem plugins if they have not already been loaded.
3384 */
dbc5623e 3385 transport_subsystem_check_init();
c66ac9db
NB		 3386
3387 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3388 if (IS_ERR(hba))
3389 return ERR_CAST(hba);
3390
3391 config_group_init_type_name(&hba->hba_group, name,
3392 &target_core_hba_cit);
3393
3394 return &hba->hba_group;
3395}
3396
3397static void target_core_call_delhbafromtarget(
3398 struct config_group *group,
3399 struct config_item *item)
3400{
1f6fe7cb
NB		 3401 /*
3402 * core_delete_hba() is called from target_core_hba_item_ops->release()
3403 * -> target_core_hba_release()
3404 */
c66ac9db 3405 config_item_put(item);
c66ac9db
NB		 3406}
3407
3408static struct configfs_group_operations target_core_group_ops = {
3409 .make_group = target_core_call_addhbatotarget,
3410 .drop_item = target_core_call_delhbafromtarget,
3411};
3412
3413static struct config_item_type target_core_cit = {
3414 .ct_item_ops = NULL,
3415 .ct_group_ops = &target_core_group_ops,
3416 .ct_attrs = NULL,
3417 .ct_owner = THIS_MODULE,
3418};
3419
3420/* Stop functions for struct config_item_type target_core_hba_cit */
3421
0a06d430 3422void target_setup_backend_cits(struct target_backend *tb)
73112edc 3423{
0a06d430
CH		 3424 target_core_setup_dev_cit(tb);
3425 target_core_setup_dev_attrib_cit(tb);
3426 target_core_setup_dev_pr_cit(tb);
3427 target_core_setup_dev_wwn_cit(tb);
3428 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3429 target_core_setup_dev_stat_cit(tb);
73112edc 3430}
73112edc 3431
54550fab 3432static int __init target_core_init_configfs(void)
c66ac9db
NB		 3433{
3434 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3435 struct config_group *lu_gp_cg = NULL;
d588cf8f 3436 struct configfs_subsystem *subsys = &target_core_fabrics;
c66ac9db
NB		 3437 struct t10_alua_lu_gp *lu_gp;
3438 int ret;
3439
6708bb27 3440 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
c66ac9db
NB		 3441 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3442 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3443
c66ac9db
NB		 3444 config_group_init(&subsys->su_group);
3445 mutex_init(&subsys->su_mutex);
3446
e3d6f909 3447 ret = init_se_kmem_caches();
c66ac9db 3448 if (ret < 0)
e3d6f909 3449 return ret;
c66ac9db
NB		 3450 /*
3451 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3452 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3453 */
3454 target_cg = &subsys->su_group;
ab6dae82 3455 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 3456 GFP_KERNEL);
6708bb27
AG		 3457 if (!target_cg->default_groups) {
3458 pr_err("Unable to allocate target_cg->default_groups\n");
37bb7899 3459 ret = -ENOMEM;
c66ac9db
NB		 3460 goto out_global;
3461 }
3462
e3d6f909 3463 config_group_init_type_name(&target_core_hbagroup,
c66ac9db 3464 "core", &target_core_cit);
e3d6f909 3465 target_cg->default_groups[0] = &target_core_hbagroup;
c66ac9db
NB		 3466 target_cg->default_groups[1] = NULL;
3467 /*
3468 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3469 */
e3d6f909 3470 hba_cg = &target_core_hbagroup;
13f6a914 3471 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 3472 GFP_KERNEL);
6708bb27
AG		 3473 if (!hba_cg->default_groups) {
3474 pr_err("Unable to allocate hba_cg->default_groups\n");
37bb7899 3475 ret = -ENOMEM;
c66ac9db
NB		 3476 goto out_global;
3477 }
e3d6f909 3478 config_group_init_type_name(&alua_group,
c66ac9db 3479 "alua", &target_core_alua_cit);
e3d6f909 3480 hba_cg->default_groups[0] = &alua_group;
c66ac9db
NB		 3481 hba_cg->default_groups[1] = NULL;
3482 /*
3483 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3484 * groups under /sys/kernel/config/target/core/alua/
3485 */
e3d6f909 3486 alua_cg = &alua_group;
13f6a914 3487 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 3488 GFP_KERNEL);
6708bb27
AG		 3489 if (!alua_cg->default_groups) {
3490 pr_err("Unable to allocate alua_cg->default_groups\n");
37bb7899 3491 ret = -ENOMEM;
c66ac9db
NB		 3492 goto out_global;
3493 }
3494
e3d6f909 3495 config_group_init_type_name(&alua_lu_gps_group,
c66ac9db 3496 "lu_gps", &target_core_alua_lu_gps_cit);
e3d6f909 3497 alua_cg->default_groups[0] = &alua_lu_gps_group;
c66ac9db
NB		 3498 alua_cg->default_groups[1] = NULL;
3499 /*
3500 * Add core/alua/lu_gps/default_lu_gp
3501 */
3502 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
37bb7899
PST		 3503 if (IS_ERR(lu_gp)) {
3504 ret = -ENOMEM;
c66ac9db 3505 goto out_global;
37bb7899 3506 }
c66ac9db 3507
e3d6f909 3508 lu_gp_cg = &alua_lu_gps_group;
13f6a914 3509 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 3510 GFP_KERNEL);
6708bb27
AG		 3511 if (!lu_gp_cg->default_groups) {
3512 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
37bb7899 3513 ret = -ENOMEM;
c66ac9db
NB		 3514 goto out_global;
3515 }
3516
3517 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3518 &target_core_alua_lu_gp_cit);
3519 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3520 lu_gp_cg->default_groups[1] = NULL;
e3d6f909 3521 default_lu_gp = lu_gp;
c66ac9db
NB		 3522 /*
3523 * Register the target_core_mod subsystem with configfs.
3524 */
3525 ret = configfs_register_subsystem(subsys);
3526 if (ret < 0) {
6708bb27 3527 pr_err("Error %d while registering subsystem %s\n",
c66ac9db
NB		 3528 ret, subsys->su_group.cg_item.ci_namebuf);
3529 goto out_global;
3530 }
6708bb27 3531 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
ce8dd25d 3532 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
c66ac9db
NB		 3533 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3534 /*
3535 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3536 */
3537 ret = rd_module_init();
3538 if (ret < 0)
3539 goto out;
3540
0d0f9dfb
RD		 3541 ret = core_dev_setup_virtual_lun0();
3542 if (ret < 0)
c66ac9db
NB		 3543 goto out;
3544
f99715ac
NB		 3545 ret = target_xcopy_setup_pt();
3546 if (ret < 0)
3547 goto out;
3548
c66ac9db
NB		 3549 return 0;
3550
3551out:
3552 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3553 core_dev_release_virtual_lun0();
3554 rd_module_exit();
3555out_global:
e3d6f909
AG		 3556 if (default_lu_gp) {
3557 core_alua_free_lu_gp(default_lu_gp);
3558 default_lu_gp = NULL;
c66ac9db
NB		 3559 }
3560 if (lu_gp_cg)
3561 kfree(lu_gp_cg->default_groups);
3562 if (alua_cg)
3563 kfree(alua_cg->default_groups);
3564 if (hba_cg)
3565 kfree(hba_cg->default_groups);
3566 kfree(target_cg->default_groups);
e3d6f909
AG		 3567 release_se_kmem_caches();
3568 return ret;
c66ac9db
NB		 3569}
3570
54550fab 3571static void __exit target_core_exit_configfs(void)
c66ac9db 3572{
c66ac9db
NB		 3573 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3574 struct config_item *item;
3575 int i;
3576
e3d6f909 3577 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3578 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3579 item = &lu_gp_cg->default_groups[i]->cg_item;
3580 lu_gp_cg->default_groups[i] = NULL;
3581 config_item_put(item);
3582 }
3583 kfree(lu_gp_cg->default_groups);
7c2bf6e9 3584 lu_gp_cg->default_groups = NULL;
c66ac9db 3585
e3d6f909 3586 alua_cg = &alua_group;
c66ac9db
NB		 3587 for (i = 0; alua_cg->default_groups[i]; i++) {
3588 item = &alua_cg->default_groups[i]->cg_item;
3589 alua_cg->default_groups[i] = NULL;
3590 config_item_put(item);
3591 }
3592 kfree(alua_cg->default_groups);
7c2bf6e9 3593 alua_cg->default_groups = NULL;
c66ac9db 3594
e3d6f909 3595 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3596 for (i = 0; hba_cg->default_groups[i]; i++) {
3597 item = &hba_cg->default_groups[i]->cg_item;
3598 hba_cg->default_groups[i] = NULL;
3599 config_item_put(item);
3600 }
3601 kfree(hba_cg->default_groups);
7c2bf6e9
NB		 3602 hba_cg->default_groups = NULL;
3603 /*
3604 * We expect subsys->su_group.default_groups to be released
3605 * by configfs subsystem provider logic..
3606 */
d588cf8f
CH		 3607 configfs_unregister_subsystem(&target_core_fabrics);
3608 kfree(target_core_fabrics.su_group.default_groups);
c66ac9db 3609
e3d6f909
AG		 3610 core_alua_free_lu_gp(default_lu_gp);
3611 default_lu_gp = NULL;
7c2bf6e9 3612
6708bb27 3613 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
c66ac9db
NB		 3614 " Infrastructure\n");
3615
c66ac9db
NB		 3616 core_dev_release_virtual_lun0();
3617 rd_module_exit();
f99715ac 3618 target_xcopy_release_pt();
e3d6f909 3619 release_se_kmem_caches();
c66ac9db
NB		 3620}
3621
3622MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3623MODULE_AUTHOR("nab@Linux-iSCSI.org");
3624MODULE_LICENSE("GPL");
3625
3626module_init(target_core_init_configfs);
3627module_exit(target_core_exit_configfs);
Linux 6.x block layer and io_uring tree(s)