projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ib_srpt: Remove set-but-not-used variables
[deliverable/linux.git] / drivers / target / target_core_configfs.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
4c76251e 6 * (c) Copyright 2008-2013 Datera, Inc.
c66ac9db
NB		 7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23#include <linux/module.h>
24#include <linux/moduleparam.h>
c66ac9db
NB		 25#include <generated/utsrelease.h>
26#include <linux/utsname.h>
27#include <linux/init.h>
28#include <linux/fs.h>
29#include <linux/namei.h>
30#include <linux/slab.h>
31#include <linux/types.h>
32#include <linux/delay.h>
33#include <linux/unistd.h>
34#include <linux/string.h>
35#include <linux/parser.h>
36#include <linux/syscalls.h>
37#include <linux/configfs.h>
e3d6f909 38#include <linux/spinlock.h>
c66ac9db
NB		 39
40#include <target/target_core_base.h>
c4795fb2
CH		 41#include <target/target_core_backend.h>
42#include <target/target_core_fabric.h>
c66ac9db
NB		 43#include <target/target_core_fabric_configfs.h>
44#include <target/target_core_configfs.h>
45#include <target/configfs_macros.h>
46
e26d99ae 47#include "target_core_internal.h"
c66ac9db 48#include "target_core_alua.h"
c66ac9db
NB		 49#include "target_core_pr.h"
50#include "target_core_rd.h"
f99715ac 51#include "target_core_xcopy.h"
c66ac9db 52
73112edc
NB		 53#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
54static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
55{ \
56 struct target_backend_cits *tbc = &sa->tb_cits; \
57 struct config_item_type *cit = &tbc->tb_##_name##_cit; \
58 \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = _attrs; \
62 cit->ct_owner = sa->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
64}
65
e3d6f909
AG		 66extern struct t10_alua_lu_gp *default_lu_gp;
67
d0f474e5
RD		 68static LIST_HEAD(g_tf_list);
69static DEFINE_MUTEX(g_tf_lock);
c66ac9db
NB		 70
71struct target_core_configfs_attribute {
72 struct configfs_attribute attr;
73 ssize_t (*show)(void *, char *);
74 ssize_t (*store)(void *, const char *, size_t);
75};
76
e3d6f909
AG		 77static struct config_group target_core_hbagroup;
78static struct config_group alua_group;
79static struct config_group alua_lu_gps_group;
80
c66ac9db
NB		 81static inline struct se_hba *
82item_to_hba(struct config_item *item)
83{
84 return container_of(to_config_group(item), struct se_hba, hba_group);
85}
86
87/*
88 * Attributes for /sys/kernel/config/target/
89 */
90static ssize_t target_core_attr_show(struct config_item *item,
91 struct configfs_attribute *attr,
92 char *page)
93{
94 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
95 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
96 utsname()->sysname, utsname()->machine);
97}
98
99static struct configfs_item_operations target_core_fabric_item_ops = {
100 .show_attribute = target_core_attr_show,
101};
102
103static struct configfs_attribute target_core_item_attr_version = {
104 .ca_owner = THIS_MODULE,
105 .ca_name = "version",
106 .ca_mode = S_IRUGO,
107};
108
109static struct target_fabric_configfs *target_core_get_fabric(
110 const char *name)
111{
112 struct target_fabric_configfs *tf;
113
6708bb27 114 if (!name)
c66ac9db
NB		 115 return NULL;
116
117 mutex_lock(&g_tf_lock);
118 list_for_each_entry(tf, &g_tf_list, tf_list) {
6708bb27 119 if (!strcmp(tf->tf_name, name)) {
c66ac9db
NB		 120 atomic_inc(&tf->tf_access_cnt);
121 mutex_unlock(&g_tf_lock);
122 return tf;
123 }
124 }
125 mutex_unlock(&g_tf_lock);
126
127 return NULL;
128}
129
130/*
131 * Called from struct target_core_group_ops->make_group()
132 */
133static struct config_group *target_core_register_fabric(
134 struct config_group *group,
135 const char *name)
136{
137 struct target_fabric_configfs *tf;
138 int ret;
139
6708bb27 140 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
c66ac9db 141 " %s\n", group, name);
e7b7af6e
RD		 142
143 tf = target_core_get_fabric(name);
144 if (!tf) {
62554910
NB		 145 pr_debug("target_core_register_fabric() trying autoload for %s\n",
146 name);
e7b7af6e 147
c66ac9db 148 /*
e7b7af6e
RD		 149 * Below are some hardcoded request_module() calls to automatically
150 * local fabric modules when the following is called:
c66ac9db 151 *
e7b7af6e 152 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
c66ac9db 153 *
e7b7af6e
RD		 154 * Note that this does not limit which TCM fabric module can be
155 * registered, but simply provids auto loading logic for modules with
156 * mkdir(2) system calls with known TCM fabric modules.
c66ac9db 157 */
e7b7af6e
RD		 158
159 if (!strncmp(name, "iscsi", 5)) {
160 /*
161 * Automatically load the LIO Target fabric module when the
162 * following is called:
163 *
164 * mkdir -p $CONFIGFS/target/iscsi
165 */
166 ret = request_module("iscsi_target_mod");
167 if (ret < 0) {
62554910
NB		 168 pr_debug("request_module() failed for"
169 " iscsi_target_mod.ko: %d\n", ret);
e7b7af6e
RD		 170 return ERR_PTR(-EINVAL);
171 }
172 } else if (!strncmp(name, "loopback", 8)) {
173 /*
174 * Automatically load the tcm_loop fabric module when the
175 * following is called:
176 *
177 * mkdir -p $CONFIGFS/target/loopback
178 */
179 ret = request_module("tcm_loop");
180 if (ret < 0) {
62554910
NB		 181 pr_debug("request_module() failed for"
182 " tcm_loop.ko: %d\n", ret);
e7b7af6e
RD		 183 return ERR_PTR(-EINVAL);
184 }
c66ac9db 185 }
e7b7af6e
RD		 186
187 tf = target_core_get_fabric(name);
c66ac9db
NB		 188 }
189
6708bb27 190 if (!tf) {
62554910
NB		 191 pr_debug("target_core_get_fabric() failed for %s\n",
192 name);
c66ac9db
NB		 193 return ERR_PTR(-EINVAL);
194 }
6708bb27 195 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
c66ac9db
NB		 196 " %s\n", tf->tf_name);
197 /*
198 * On a successful target_core_get_fabric() look, the returned
199 * struct target_fabric_configfs *tf will contain a usage reference.
200 */
6708bb27 201 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
d80e224d 202 &tf->tf_cit_tmpl.tfc_wwn_cit);
c66ac9db
NB		 203
204 tf->tf_group.default_groups = tf->tf_default_groups;
205 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
206 tf->tf_group.default_groups[1] = NULL;
207
208 config_group_init_type_name(&tf->tf_group, name,
d80e224d 209 &tf->tf_cit_tmpl.tfc_wwn_cit);
c66ac9db 210 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
d80e224d 211 &tf->tf_cit_tmpl.tfc_discovery_cit);
c66ac9db 212
6708bb27 213 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
c66ac9db 214 " %s\n", tf->tf_group.cg_item.ci_name);
c66ac9db 215 tf->tf_fabric = &tf->tf_group.cg_item;
6708bb27 216 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
c66ac9db
NB		 217 " for %s\n", name);
218
219 return &tf->tf_group;
220}
221
222/*
223 * Called from struct target_core_group_ops->drop_item()
224 */
225static void target_core_deregister_fabric(
226 struct config_group *group,
227 struct config_item *item)
228{
229 struct target_fabric_configfs *tf = container_of(
230 to_config_group(item), struct target_fabric_configfs, tf_group);
231 struct config_group *tf_group;
232 struct config_item *df_item;
233 int i;
234
6708bb27 235 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
c66ac9db
NB		 236 " tf list\n", config_item_name(item));
237
6708bb27 238 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
c66ac9db
NB		 239 " %s\n", tf->tf_name);
240 atomic_dec(&tf->tf_access_cnt);
241
6708bb27 242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
c66ac9db
NB		 243 " tf->tf_fabric for %s\n", tf->tf_name);
244 tf->tf_fabric = NULL;
245
6708bb27 246 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
c66ac9db
NB		 247 " %s\n", config_item_name(item));
248
249 tf_group = &tf->tf_group;
250 for (i = 0; tf_group->default_groups[i]; i++) {
251 df_item = &tf_group->default_groups[i]->cg_item;
252 tf_group->default_groups[i] = NULL;
253 config_item_put(df_item);
254 }
255 config_item_put(item);
256}
257
258static struct configfs_group_operations target_core_fabric_group_ops = {
259 .make_group = &target_core_register_fabric,
260 .drop_item = &target_core_deregister_fabric,
261};
262
263/*
264 * All item attributes appearing in /sys/kernel/target/ appear here.
265 */
266static struct configfs_attribute *target_core_fabric_item_attrs[] = {
267 &target_core_item_attr_version,
268 NULL,
269};
270
271/*
272 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
273 */
274static struct config_item_type target_core_fabrics_item = {
275 .ct_item_ops = &target_core_fabric_item_ops,
276 .ct_group_ops = &target_core_fabric_group_ops,
277 .ct_attrs = target_core_fabric_item_attrs,
278 .ct_owner = THIS_MODULE,
279};
280
281static struct configfs_subsystem target_core_fabrics = {
282 .su_group = {
283 .cg_item = {
284 .ci_namebuf = "target",
285 .ci_type = &target_core_fabrics_item,
286 },
287 },
288};
289
d588cf8f
CH		 290int target_depend_item(struct config_item *item)
291{
292 return configfs_depend_item(&target_core_fabrics, item);
293}
294EXPORT_SYMBOL(target_depend_item);
295
296void target_undepend_item(struct config_item *item)
297{
298 return configfs_undepend_item(&target_core_fabrics, item);
299}
300EXPORT_SYMBOL(target_undepend_item);
c66ac9db
NB		 301
302/*##############################################################################
303// Start functions called by external Target Fabrics Modules
304//############################################################################*/
305
9ac8928e 306static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
c66ac9db 307{
9ac8928e
CH		 308 if (!tfo->name) {
309 pr_err("Missing tfo->name\n");
310 return -EINVAL;
c66ac9db 311 }
9ac8928e 312 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
6708bb27 313 pr_err("Passed name: %s exceeds TARGET_FABRIC"
9ac8928e
CH		 314 "_NAME_SIZE\n", tfo->name);
315 return -EINVAL;
c66ac9db 316 }
6708bb27
AG		 317 if (!tfo->get_fabric_name) {
318 pr_err("Missing tfo->get_fabric_name()\n");
c66ac9db
NB		 319 return -EINVAL;
320 }
6708bb27
AG		 321 if (!tfo->tpg_get_wwn) {
322 pr_err("Missing tfo->tpg_get_wwn()\n");
c66ac9db
NB		 323 return -EINVAL;
324 }
6708bb27
AG		 325 if (!tfo->tpg_get_tag) {
326 pr_err("Missing tfo->tpg_get_tag()\n");
c66ac9db
NB		 327 return -EINVAL;
328 }
6708bb27
AG		 329 if (!tfo->tpg_check_demo_mode) {
330 pr_err("Missing tfo->tpg_check_demo_mode()\n");
c66ac9db
NB		 331 return -EINVAL;
332 }
6708bb27
AG		 333 if (!tfo->tpg_check_demo_mode_cache) {
334 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
c66ac9db
NB		 335 return -EINVAL;
336 }
6708bb27
AG		 337 if (!tfo->tpg_check_demo_mode_write_protect) {
338 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
c66ac9db
NB		 339 return -EINVAL;
340 }
6708bb27
AG		 341 if (!tfo->tpg_check_prod_mode_write_protect) {
342 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
c66ac9db
NB		 343 return -EINVAL;
344 }
6708bb27
AG		 345 if (!tfo->tpg_get_inst_index) {
346 pr_err("Missing tfo->tpg_get_inst_index()\n");
c66ac9db
NB		 347 return -EINVAL;
348 }
35462975 349 if (!tfo->release_cmd) {
6708bb27 350 pr_err("Missing tfo->release_cmd()\n");
c66ac9db
NB		 351 return -EINVAL;
352 }
6708bb27
AG		 353 if (!tfo->shutdown_session) {
354 pr_err("Missing tfo->shutdown_session()\n");
c66ac9db
NB		 355 return -EINVAL;
356 }
6708bb27
AG		 357 if (!tfo->close_session) {
358 pr_err("Missing tfo->close_session()\n");
c66ac9db
NB		 359 return -EINVAL;
360 }
6708bb27
AG		 361 if (!tfo->sess_get_index) {
362 pr_err("Missing tfo->sess_get_index()\n");
c66ac9db
NB		 363 return -EINVAL;
364 }
6708bb27
AG		 365 if (!tfo->write_pending) {
366 pr_err("Missing tfo->write_pending()\n");
c66ac9db
NB		 367 return -EINVAL;
368 }
6708bb27
AG		 369 if (!tfo->write_pending_status) {
370 pr_err("Missing tfo->write_pending_status()\n");
c66ac9db
NB		 371 return -EINVAL;
372 }
6708bb27
AG		 373 if (!tfo->set_default_node_attributes) {
374 pr_err("Missing tfo->set_default_node_attributes()\n");
c66ac9db
NB		 375 return -EINVAL;
376 }
6708bb27
AG		 377 if (!tfo->get_cmd_state) {
378 pr_err("Missing tfo->get_cmd_state()\n");
c66ac9db
NB		 379 return -EINVAL;
380 }
6708bb27
AG		 381 if (!tfo->queue_data_in) {
382 pr_err("Missing tfo->queue_data_in()\n");
c66ac9db
NB		 383 return -EINVAL;
384 }
6708bb27
AG		 385 if (!tfo->queue_status) {
386 pr_err("Missing tfo->queue_status()\n");
c66ac9db
NB		 387 return -EINVAL;
388 }
6708bb27
AG		 389 if (!tfo->queue_tm_rsp) {
390 pr_err("Missing tfo->queue_tm_rsp()\n");
c66ac9db
NB		 391 return -EINVAL;
392 }
131e6abc
NB		 393 if (!tfo->aborted_task) {
394 pr_err("Missing tfo->aborted_task()\n");
395 return -EINVAL;
396 }
c66ac9db
NB		 397 /*
398 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
399 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
400 * target_core_fabric_configfs.c WWN+TPG group context code.
401 */
6708bb27
AG		 402 if (!tfo->fabric_make_wwn) {
403 pr_err("Missing tfo->fabric_make_wwn()\n");
c66ac9db
NB		 404 return -EINVAL;
405 }
6708bb27
AG		 406 if (!tfo->fabric_drop_wwn) {
407 pr_err("Missing tfo->fabric_drop_wwn()\n");
c66ac9db
NB		 408 return -EINVAL;
409 }
6708bb27
AG		 410 if (!tfo->fabric_make_tpg) {
411 pr_err("Missing tfo->fabric_make_tpg()\n");
c66ac9db
NB		 412 return -EINVAL;
413 }
6708bb27
AG		 414 if (!tfo->fabric_drop_tpg) {
415 pr_err("Missing tfo->fabric_drop_tpg()\n");
c66ac9db
NB		 416 return -EINVAL;
417 }
418
419 return 0;
420}
421
9ac8928e 422int target_register_template(const struct target_core_fabric_ops *fo)
c66ac9db 423{
9ac8928e 424 struct target_fabric_configfs *tf;
c66ac9db
NB		 425 int ret;
426
9ac8928e
CH		 427 ret = target_fabric_tf_ops_check(fo);
428 if (ret)
429 return ret;
430
431 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
6708bb27 432 if (!tf) {
9ac8928e
CH		 433 pr_err("%s: could not allocate memory!\n", __func__);
434 return -ENOMEM;
c66ac9db 435 }
c66ac9db 436
9ac8928e
CH		 437 INIT_LIST_HEAD(&tf->tf_list);
438 atomic_set(&tf->tf_access_cnt, 0);
439
440 /*
441 * Setup the default generic struct config_item_type's (cits) in
442 * struct target_fabric_configfs->tf_cit_tmpl
443 */
444 tf->tf_module = fo->module;
9ac8928e
CH		 445 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", fo->name);
446
447 tf->tf_ops = *fo;
448 target_fabric_setup_cits(tf);
449
450 mutex_lock(&g_tf_lock);
451 list_add_tail(&tf->tf_list, &g_tf_list);
452 mutex_unlock(&g_tf_lock);
453
c66ac9db
NB		 454 return 0;
455}
9ac8928e 456EXPORT_SYMBOL(target_register_template);
c66ac9db 457
9ac8928e 458void target_unregister_template(const struct target_core_fabric_ops *fo)
c66ac9db 459{
9ac8928e 460 struct target_fabric_configfs *t;
c66ac9db 461
c66ac9db 462 mutex_lock(&g_tf_lock);
9ac8928e
CH		 463 list_for_each_entry(t, &g_tf_list, tf_list) {
464 if (!strcmp(t->tf_name, fo->name)) {
465 BUG_ON(atomic_read(&t->tf_access_cnt));
466 list_del(&t->tf_list);
467 kfree(t);
468 break;
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 */
c66ac9db 480
c66ac9db 481CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
c66ac9db
NB		 482CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
483
c66ac9db
NB		 484static struct configfs_item_operations target_core_dev_attrib_ops = {
485 .show_attribute = target_core_dev_attrib_attr_show,
486 .store_attribute = target_core_dev_attrib_attr_store,
487};
488
43cf208c 489TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
c66ac9db 490
f79a897e 491/* End functions for struct config_item_type tb_dev_attrib_cit */
c66ac9db 492
f8d389c6 493/* Start functions for struct config_item_type tb_dev_wwn_cit */
c66ac9db
NB		 494
495CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
496#define SE_DEV_WWN_ATTR(_name, _mode) \
497static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
498 __CONFIGFS_EATTR(_name, _mode, \
499 target_core_dev_wwn_show_attr_##_name, \
500 target_core_dev_wwn_store_attr_##_name);
501
502#define SE_DEV_WWN_ATTR_RO(_name); \
503do { \
504 static struct target_core_dev_wwn_attribute \
505 target_core_dev_wwn_##_name = \
506 __CONFIGFS_EATTR_RO(_name, \
507 target_core_dev_wwn_show_attr_##_name); \
508} while (0);
509
510/*
511 * VPD page 0x80 Unit serial
512 */
513static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
514 struct t10_wwn *t10_wwn,
515 char *page)
516{
c66ac9db
NB		 517 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
518 &t10_wwn->unit_serial[0]);
519}
520
521static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
522 struct t10_wwn *t10_wwn,
523 const char *page,
524 size_t count)
525{
0fd97ccf 526 struct se_device *dev = t10_wwn->t10_dev;
c66ac9db
NB		 527 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
528
529 /*
530 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
531 * from the struct scsi_device level firmware, do not allow
532 * VPD Unit Serial to be emulated.
533 *
534 * Note this struct scsi_device could also be emulating VPD
535 * information from its drivers/scsi LLD. But for now we assume
536 * it is doing 'the right thing' wrt a world wide unique
537 * VPD Unit Serial Number that OS dependent multipath can depend on.
538 */
0fd97ccf 539 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
6708bb27 540 pr_err("Underlying SCSI device firmware provided VPD"
c66ac9db
NB		 541 " Unit Serial, ignoring request\n");
542 return -EOPNOTSUPP;
543 }
544
60d645a4 545 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
6708bb27 546 pr_err("Emulated VPD Unit Serial exceeds"
c66ac9db
NB		 547 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
548 return -EOVERFLOW;
549 }
550 /*
551 * Check to see if any active $FABRIC_MOD exports exist. If they
552 * do exist, fail here as changing this information on the fly
553 * (underneath the initiator side OS dependent multipath code)
554 * could cause negative effects.
555 */
0fd97ccf
CH		 556 if (dev->export_count) {
557 pr_err("Unable to set VPD Unit Serial while"
558 " active %d $FABRIC_MOD exports exist\n",
559 dev->export_count);
560 return -EINVAL;
c66ac9db 561 }
0fd97ccf 562
c66ac9db
NB		 563 /*
564 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
565 *
566 * Also, strip any newline added from the userspace
567 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
568 */
569 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
570 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
0fd97ccf 571 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
c66ac9db 572 "%s", strstrip(buf));
0fd97ccf 573 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
c66ac9db 574
6708bb27 575 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
0fd97ccf 576 " %s\n", dev->t10_wwn.unit_serial);
c66ac9db
NB		 577
578 return count;
579}
580
581SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
582
583/*
584 * VPD page 0x83 Protocol Identifier
585 */
586static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
587 struct t10_wwn *t10_wwn,
588 char *page)
589{
c66ac9db
NB		 590 struct t10_vpd *vpd;
591 unsigned char buf[VPD_TMP_BUF_SIZE];
592 ssize_t len = 0;
593
c66ac9db
NB		 594 memset(buf, 0, VPD_TMP_BUF_SIZE);
595
596 spin_lock(&t10_wwn->t10_vpd_lock);
597 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
6708bb27 598 if (!vpd->protocol_identifier_set)
c66ac9db
NB		 599 continue;
600
601 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
602
6708bb27 603 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 604 break;
605
606 len += sprintf(page+len, "%s", buf);
607 }
608 spin_unlock(&t10_wwn->t10_vpd_lock);
609
610 return len;
611}
612
613static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
614 struct t10_wwn *t10_wwn,
615 const char *page,
616 size_t count)
617{
618 return -ENOSYS;
619}
620
621SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
622
623/*
624 * Generic wrapper for dumping VPD identifiers by association.
625 */
626#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
627static ssize_t target_core_dev_wwn_show_attr_##_name( \
628 struct t10_wwn *t10_wwn, \
629 char *page) \
630{ \
c66ac9db
NB		 631 struct t10_vpd *vpd; \
632 unsigned char buf[VPD_TMP_BUF_SIZE]; \
633 ssize_t len = 0; \
634 \
c66ac9db
NB		 635 spin_lock(&t10_wwn->t10_vpd_lock); \
636 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
637 if (vpd->association != _assoc) \
638 continue; \
639 \
640 memset(buf, 0, VPD_TMP_BUF_SIZE); \
641 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 642 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 643 break; \
644 len += sprintf(page+len, "%s", buf); \
645 \
646 memset(buf, 0, VPD_TMP_BUF_SIZE); \
647 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 648 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 649 break; \
650 len += sprintf(page+len, "%s", buf); \
651 \
652 memset(buf, 0, VPD_TMP_BUF_SIZE); \
653 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 654 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 655 break; \
656 len += sprintf(page+len, "%s", buf); \
657 } \
658 spin_unlock(&t10_wwn->t10_vpd_lock); \
659 \
660 return len; \
661}
662
663/*
163cd5fa 664 * VPD page 0x83 Association: Logical Unit
c66ac9db
NB		 665 */
666DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
667
668static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
669 struct t10_wwn *t10_wwn,
670 const char *page,
671 size_t count)
672{
673 return -ENOSYS;
674}
675
676SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
677
678/*
679 * VPD page 0x83 Association: Target Port
680 */
681DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
682
683static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
684 struct t10_wwn *t10_wwn,
685 const char *page,
686 size_t count)
687{
688 return -ENOSYS;
689}
690
691SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
692
693/*
694 * VPD page 0x83 Association: SCSI Target Device
695 */
696DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
697
698static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
699 struct t10_wwn *t10_wwn,
700 const char *page,
701 size_t count)
702{
703 return -ENOSYS;
704}
705
706SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
707
708CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
709
710static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
711 &target_core_dev_wwn_vpd_unit_serial.attr,
712 &target_core_dev_wwn_vpd_protocol_identifier.attr,
713 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
714 &target_core_dev_wwn_vpd_assoc_target_port.attr,
715 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
716 NULL,
717};
718
719static struct configfs_item_operations target_core_dev_wwn_ops = {
720 .show_attribute = target_core_dev_wwn_attr_show,
721 .store_attribute = target_core_dev_wwn_attr_store,
722};
723
f8d389c6 724TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
c66ac9db 725
f8d389c6 726/* End functions for struct config_item_type tb_dev_wwn_cit */
c66ac9db 727
91e2e39b 728/* Start functions for struct config_item_type tb_dev_pr_cit */
c66ac9db 729
0fd97ccf 730CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
c66ac9db
NB		 731#define SE_DEV_PR_ATTR(_name, _mode) \
732static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
733 __CONFIGFS_EATTR(_name, _mode, \
734 target_core_dev_pr_show_attr_##_name, \
735 target_core_dev_pr_store_attr_##_name);
736
737#define SE_DEV_PR_ATTR_RO(_name); \
738static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
739 __CONFIGFS_EATTR_RO(_name, \
740 target_core_dev_pr_show_attr_##_name);
741
d977f437
CH		 742static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
743 char *page)
c66ac9db
NB		 744{
745 struct se_node_acl *se_nacl;
746 struct t10_pr_registration *pr_reg;
747 char i_buf[PR_REG_ISID_ID_LEN];
c66ac9db
NB		 748
749 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
750
c66ac9db 751 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 752 if (!pr_reg)
753 return sprintf(page, "No SPC-3 Reservation holder\n");
754
c66ac9db 755 se_nacl = pr_reg->pr_reg_nacl;
d2843c17 756 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
c66ac9db 757
d977f437 758 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
e3d6f909 759 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
d2843c17 760 se_nacl->initiatorname, i_buf);
c66ac9db
NB		 761}
762
d977f437
CH		 763static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
764 char *page)
c66ac9db
NB		 765{
766 struct se_node_acl *se_nacl;
d977f437 767 ssize_t len;
c66ac9db 768
c66ac9db 769 se_nacl = dev->dev_reserved_node_acl;
d977f437
CH		 770 if (se_nacl) {
771 len = sprintf(page,
772 "SPC-2 Reservation: %s Initiator: %s\n",
773 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
774 se_nacl->initiatorname);
775 } else {
776 len = sprintf(page, "No SPC-2 Reservation holder\n");
c66ac9db 777 }
d977f437 778 return len;
c66ac9db
NB		 779}
780
0fd97ccf
CH		 781static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
782 char *page)
c66ac9db 783{
d977f437 784 int ret;
c66ac9db 785
a3541703 786 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
d977f437 787 return sprintf(page, "Passthrough\n");
c66ac9db 788
d977f437
CH		 789 spin_lock(&dev->dev_reservation_lock);
790 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
791 ret = target_core_dev_pr_show_spc2_res(dev, page);
792 else
793 ret = target_core_dev_pr_show_spc3_res(dev, page);
794 spin_unlock(&dev->dev_reservation_lock);
795 return ret;
c66ac9db
NB		 796}
797
798SE_DEV_PR_ATTR_RO(res_holder);
799
c66ac9db 800static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
0fd97ccf 801 struct se_device *dev, char *page)
c66ac9db 802{
c66ac9db
NB		 803 ssize_t len = 0;
804
c66ac9db 805 spin_lock(&dev->dev_reservation_lock);
d977f437 806 if (!dev->dev_pr_res_holder) {
c66ac9db 807 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 808 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
c66ac9db
NB		 809 len = sprintf(page, "SPC-3 Reservation: All Target"
810 " Ports registration\n");
d977f437 811 } else {
c66ac9db
NB		 812 len = sprintf(page, "SPC-3 Reservation: Single"
813 " Target Port registration\n");
d977f437 814 }
c66ac9db 815
d977f437 816 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 817 return len;
818}
819
820SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
821
c66ac9db 822static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
0fd97ccf 823 struct se_device *dev, char *page)
c66ac9db 824{
0fd97ccf 825 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
c66ac9db
NB		 826}
827
828SE_DEV_PR_ATTR_RO(res_pr_generation);
829
830/*
831 * res_pr_holder_tg_port
832 */
833static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
0fd97ccf 834 struct se_device *dev, char *page)
c66ac9db 835{
c66ac9db
NB		 836 struct se_node_acl *se_nacl;
837 struct se_lun *lun;
838 struct se_portal_group *se_tpg;
839 struct t10_pr_registration *pr_reg;
9ac8928e 840 const struct target_core_fabric_ops *tfo;
c66ac9db
NB		 841 ssize_t len = 0;
842
c66ac9db
NB		 843 spin_lock(&dev->dev_reservation_lock);
844 pr_reg = dev->dev_pr_res_holder;
6708bb27 845 if (!pr_reg) {
c66ac9db 846 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 847 goto out_unlock;
c66ac9db 848 }
d977f437 849
c66ac9db
NB		 850 se_nacl = pr_reg->pr_reg_nacl;
851 se_tpg = se_nacl->se_tpg;
852 lun = pr_reg->pr_reg_tg_pt_lun;
e3d6f909 853 tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 854
855 len += sprintf(page+len, "SPC-3 Reservation: %s"
856 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
857 tfo->tpg_get_wwn(se_tpg));
858 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
35d1efe8 859 " Identifier Tag: %hu %s Portal Group Tag: %hu"
c66ac9db
NB		 860 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
861 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
862 tfo->get_fabric_name(), lun->unpacked_lun);
c66ac9db 863
d977f437
CH		 864out_unlock:
865 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 866 return len;
867}
868
869SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
870
c66ac9db 871static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
0fd97ccf 872 struct se_device *dev, char *page)
c66ac9db 873{
9ac8928e 874 const struct target_core_fabric_ops *tfo;
c66ac9db
NB		 875 struct t10_pr_registration *pr_reg;
876 unsigned char buf[384];
877 char i_buf[PR_REG_ISID_ID_LEN];
878 ssize_t len = 0;
d2843c17 879 int reg_count = 0;
c66ac9db 880
c66ac9db
NB		 881 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
882
0fd97ccf
CH		 883 spin_lock(&dev->t10_pr.registration_lock);
884 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
c66ac9db
NB		 885 pr_reg_list) {
886
887 memset(buf, 0, 384);
888 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
889 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
d2843c17 890 core_pr_dump_initiator_port(pr_reg, i_buf,
c66ac9db
NB		 891 PR_REG_ISID_ID_LEN);
892 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
893 tfo->get_fabric_name(),
d2843c17 894 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
c66ac9db
NB		 895 pr_reg->pr_res_generation);
896
6708bb27 897 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 898 break;
899
900 len += sprintf(page+len, "%s", buf);
901 reg_count++;
902 }
0fd97ccf 903 spin_unlock(&dev->t10_pr.registration_lock);
c66ac9db 904
6708bb27 905 if (!reg_count)
c66ac9db
NB		 906 len += sprintf(page+len, "None\n");
907
908 return len;
909}
910
911SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
912
c66ac9db 913static ssize_t target_core_dev_pr_show_attr_res_pr_type(
0fd97ccf 914 struct se_device *dev, char *page)
c66ac9db 915{
c66ac9db
NB		 916 struct t10_pr_registration *pr_reg;
917 ssize_t len = 0;
918
c66ac9db
NB		 919 spin_lock(&dev->dev_reservation_lock);
920 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 921 if (pr_reg) {
922 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
923 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
924 } else {
c66ac9db 925 len = sprintf(page, "No SPC-3 Reservation holder\n");
c66ac9db 926 }
c66ac9db 927
d977f437 928 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 929 return len;
930}
931
932SE_DEV_PR_ATTR_RO(res_pr_type);
933
c66ac9db 934static ssize_t target_core_dev_pr_show_attr_res_type(
0fd97ccf 935 struct se_device *dev, char *page)
c66ac9db 936{
a3541703 937 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
d977f437
CH		 938 return sprintf(page, "SPC_PASSTHROUGH\n");
939 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
940 return sprintf(page, "SPC2_RESERVATIONS\n");
941 else
942 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
c66ac9db
NB		 943}
944
945SE_DEV_PR_ATTR_RO(res_type);
946
c66ac9db 947static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
0fd97ccf 948 struct se_device *dev, char *page)
c66ac9db 949{
a3541703 950 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
c66ac9db
NB		 951 return 0;
952
953 return sprintf(page, "APTPL Bit Status: %s\n",
0fd97ccf 954 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
c66ac9db
NB		 955}
956
957SE_DEV_PR_ATTR_RO(res_aptpl_active);
958
959/*
960 * res_aptpl_metadata
961 */
962static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
0fd97ccf 963 struct se_device *dev, char *page)
c66ac9db 964{
a3541703 965 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
c66ac9db
NB		 966 return 0;
967
968 return sprintf(page, "Ready to process PR APTPL metadata..\n");
969}
970
971enum {
972 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
973 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
974 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
975 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
976};
977
978static match_table_t tokens = {
979 {Opt_initiator_fabric, "initiator_fabric=%s"},
980 {Opt_initiator_node, "initiator_node=%s"},
981 {Opt_initiator_sid, "initiator_sid=%s"},
982 {Opt_sa_res_key, "sa_res_key=%s"},
983 {Opt_res_holder, "res_holder=%d"},
984 {Opt_res_type, "res_type=%d"},
985 {Opt_res_scope, "res_scope=%d"},
986 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
987 {Opt_mapped_lun, "mapped_lun=%d"},
988 {Opt_target_fabric, "target_fabric=%s"},
989 {Opt_target_node, "target_node=%s"},
990 {Opt_tpgt, "tpgt=%d"},
991 {Opt_port_rtpi, "port_rtpi=%d"},
992 {Opt_target_lun, "target_lun=%d"},
993 {Opt_err, NULL}
994};
995
996static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
0fd97ccf 997 struct se_device *dev,
c66ac9db
NB		 998 const char *page,
999 size_t count)
1000{
6d180253
JJ		 1001 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1002 unsigned char *t_fabric = NULL, *t_port = NULL;
8d213559 1003 char *orig, *ptr, *opts;
c66ac9db
NB		 1004 substring_t args[MAX_OPT_ARGS];
1005 unsigned long long tmp_ll;
1006 u64 sa_res_key = 0;
1007 u32 mapped_lun = 0, target_lun = 0;
1008 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1009 u16 port_rpti = 0, tpgt = 0;
1010 u8 type = 0, scope;
1011
a3541703 1012 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
d977f437
CH		 1013 return 0;
1014 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
c66ac9db
NB		 1015 return 0;
1016
0fd97ccf 1017 if (dev->export_count) {
6708bb27 1018 pr_debug("Unable to process APTPL metadata while"
c66ac9db
NB		 1019 " active fabric exports exist\n");
1020 return -EINVAL;
1021 }
1022
1023 opts = kstrdup(page, GFP_KERNEL);
1024 if (!opts)
1025 return -ENOMEM;
1026
1027 orig = opts;
90c161b6 1028 while ((ptr = strsep(&opts, ",\n")) != NULL) {
c66ac9db
NB		 1029 if (!*ptr)
1030 continue;
1031
1032 token = match_token(ptr, tokens, args);
1033 switch (token) {
1034 case Opt_initiator_fabric:
8d213559 1035 i_fabric = match_strdup(args);
6d180253
JJ		 1036 if (!i_fabric) {
1037 ret = -ENOMEM;
1038 goto out;
1039 }
c66ac9db
NB		 1040 break;
1041 case Opt_initiator_node:
8d213559 1042 i_port = match_strdup(args);
6d180253
JJ		 1043 if (!i_port) {
1044 ret = -ENOMEM;
1045 goto out;
1046 }
60d645a4 1047 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
6708bb27 1048 pr_err("APTPL metadata initiator_node="
c66ac9db
NB		 1049 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1050 PR_APTPL_MAX_IPORT_LEN);
1051 ret = -EINVAL;
1052 break;
1053 }
1054 break;
1055 case Opt_initiator_sid:
8d213559 1056 isid = match_strdup(args);
6d180253
JJ		 1057 if (!isid) {
1058 ret = -ENOMEM;
1059 goto out;
1060 }
60d645a4 1061 if (strlen(isid) >= PR_REG_ISID_LEN) {
6708bb27 1062 pr_err("APTPL metadata initiator_isid"
c66ac9db
NB		 1063 "= exceeds PR_REG_ISID_LEN: %d\n",
1064 PR_REG_ISID_LEN);
1065 ret = -EINVAL;
1066 break;
1067 }
1068 break;
1069 case Opt_sa_res_key:
8d213559 1070 ret = kstrtoull(args->from, 0, &tmp_ll);
c66ac9db 1071 if (ret < 0) {
8d213559 1072 pr_err("kstrtoull() failed for sa_res_key=\n");
c66ac9db
NB		 1073 goto out;
1074 }
1075 sa_res_key = (u64)tmp_ll;
1076 break;
1077 /*
1078 * PR APTPL Metadata for Reservation
1079 */
1080 case Opt_res_holder:
1081 match_int(args, &arg);
1082 res_holder = arg;
1083 break;
1084 case Opt_res_type:
1085 match_int(args, &arg);
1086 type = (u8)arg;
1087 break;
1088 case Opt_res_scope:
1089 match_int(args, &arg);
1090 scope = (u8)arg;
1091 break;
1092 case Opt_res_all_tg_pt:
1093 match_int(args, &arg);
1094 all_tg_pt = (int)arg;
1095 break;
1096 case Opt_mapped_lun:
1097 match_int(args, &arg);
1098 mapped_lun = (u32)arg;
1099 break;
1100 /*
1101 * PR APTPL Metadata for Target Port
1102 */
1103 case Opt_target_fabric:
8d213559 1104 t_fabric = match_strdup(args);
6d180253
JJ		 1105 if (!t_fabric) {
1106 ret = -ENOMEM;
1107 goto out;
1108 }
c66ac9db
NB		 1109 break;
1110 case Opt_target_node:
8d213559 1111 t_port = match_strdup(args);
6d180253
JJ		 1112 if (!t_port) {
1113 ret = -ENOMEM;
1114 goto out;
1115 }
60d645a4 1116 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
6708bb27 1117 pr_err("APTPL metadata target_node="
c66ac9db
NB		 1118 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1119 PR_APTPL_MAX_TPORT_LEN);
1120 ret = -EINVAL;
1121 break;
1122 }
1123 break;
1124 case Opt_tpgt:
1125 match_int(args, &arg);
1126 tpgt = (u16)arg;
1127 break;
1128 case Opt_port_rtpi:
1129 match_int(args, &arg);
1130 port_rpti = (u16)arg;
1131 break;
1132 case Opt_target_lun:
1133 match_int(args, &arg);
1134 target_lun = (u32)arg;
1135 break;
1136 default:
1137 break;
1138 }
1139 }
1140
6708bb27
AG		 1141 if (!i_port || !t_port || !sa_res_key) {
1142 pr_err("Illegal parameters for APTPL registration\n");
c66ac9db
NB		 1143 ret = -EINVAL;
1144 goto out;
1145 }
1146
1147 if (res_holder && !(type)) {
6708bb27 1148 pr_err("Illegal PR type: 0x%02x for reservation"
c66ac9db
NB		 1149 " holder\n", type);
1150 ret = -EINVAL;
1151 goto out;
1152 }
1153
0fd97ccf 1154 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
c66ac9db
NB		 1155 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1156 res_holder, all_tg_pt, type);
1157out:
6d180253
JJ		 1158 kfree(i_fabric);
1159 kfree(i_port);
1160 kfree(isid);
1161 kfree(t_fabric);
1162 kfree(t_port);
c66ac9db
NB		 1163 kfree(orig);
1164 return (ret == 0) ? count : ret;
1165}
1166
1167SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1168
0fd97ccf 1169CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
c66ac9db
NB		 1170
1171static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1172 &target_core_dev_pr_res_holder.attr,
1173 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1174 &target_core_dev_pr_res_pr_generation.attr,
1175 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1176 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1177 &target_core_dev_pr_res_pr_type.attr,
1178 &target_core_dev_pr_res_type.attr,
1179 &target_core_dev_pr_res_aptpl_active.attr,
1180 &target_core_dev_pr_res_aptpl_metadata.attr,
1181 NULL,
1182};
1183
1184static struct configfs_item_operations target_core_dev_pr_ops = {
1185 .show_attribute = target_core_dev_pr_attr_show,
1186 .store_attribute = target_core_dev_pr_attr_store,
1187};
1188
91e2e39b 1189TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
c66ac9db 1190
91e2e39b 1191/* End functions for struct config_item_type tb_dev_pr_cit */
c66ac9db 1192
73112edc 1193/* Start functions for struct config_item_type tb_dev_cit */
c66ac9db
NB		 1194
1195static ssize_t target_core_show_dev_info(void *p, char *page)
1196{
0fd97ccf
CH		 1197 struct se_device *dev = p;
1198 struct se_subsystem_api *t = dev->transport;
c66ac9db
NB		 1199 int bl = 0;
1200 ssize_t read_bytes = 0;
1201
0fd97ccf 1202 transport_dump_dev_state(dev, page, &bl);
c66ac9db 1203 read_bytes += bl;
0fd97ccf 1204 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
c66ac9db
NB		 1205 return read_bytes;
1206}
1207
1208static struct target_core_configfs_attribute target_core_attr_dev_info = {
1209 .attr = { .ca_owner = THIS_MODULE,
1210 .ca_name = "info",
1211 .ca_mode = S_IRUGO },
1212 .show = target_core_show_dev_info,
1213 .store = NULL,
1214};
1215
1216static ssize_t target_core_store_dev_control(
1217 void *p,
1218 const char *page,
1219 size_t count)
1220{
0fd97ccf
CH		 1221 struct se_device *dev = p;
1222 struct se_subsystem_api *t = dev->transport;
c66ac9db 1223
0fd97ccf 1224 return t->set_configfs_dev_params(dev, page, count);
c66ac9db
NB		 1225}
1226
1227static struct target_core_configfs_attribute target_core_attr_dev_control = {
1228 .attr = { .ca_owner = THIS_MODULE,
1229 .ca_name = "control",
1230 .ca_mode = S_IWUSR },
1231 .show = NULL,
1232 .store = target_core_store_dev_control,
1233};
1234
1235static ssize_t target_core_show_dev_alias(void *p, char *page)
1236{
0fd97ccf 1237 struct se_device *dev = p;
c66ac9db 1238
0fd97ccf 1239 if (!(dev->dev_flags & DF_USING_ALIAS))
c66ac9db
NB		 1240 return 0;
1241
0fd97ccf 1242 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
c66ac9db
NB		 1243}
1244
1245static ssize_t target_core_store_dev_alias(
1246 void *p,
1247 const char *page,
1248 size_t count)
1249{
0fd97ccf
CH		 1250 struct se_device *dev = p;
1251 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1252 ssize_t read_bytes;
1253
1254 if (count > (SE_DEV_ALIAS_LEN-1)) {
6708bb27 1255 pr_err("alias count: %d exceeds"
c66ac9db
NB		 1256 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1257 SE_DEV_ALIAS_LEN-1);
1258 return -EINVAL;
1259 }
1260
0fd97ccf 1261 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
3011684c
DC		 1262 if (!read_bytes)
1263 return -EINVAL;
0fd97ccf
CH		 1264 if (dev->dev_alias[read_bytes - 1] == '\n')
1265 dev->dev_alias[read_bytes - 1] = '\0';
0877eafd 1266
0fd97ccf 1267 dev->dev_flags |= DF_USING_ALIAS;
3011684c 1268
6708bb27 1269 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
c66ac9db 1270 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1271 config_item_name(&dev->dev_group.cg_item),
1272 dev->dev_alias);
c66ac9db
NB		 1273
1274 return read_bytes;
1275}
1276
1277static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1278 .attr = { .ca_owner = THIS_MODULE,
1279 .ca_name = "alias",
1280 .ca_mode = S_IRUGO | S_IWUSR },
1281 .show = target_core_show_dev_alias,
1282 .store = target_core_store_dev_alias,
1283};
1284
1285static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1286{
0fd97ccf 1287 struct se_device *dev = p;
c66ac9db 1288
0fd97ccf 1289 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
c66ac9db
NB		 1290 return 0;
1291
0fd97ccf 1292 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
c66ac9db
NB		 1293}
1294
1295static ssize_t target_core_store_dev_udev_path(
1296 void *p,
1297 const char *page,
1298 size_t count)
1299{
0fd97ccf
CH		 1300 struct se_device *dev = p;
1301 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1302 ssize_t read_bytes;
1303
1304 if (count > (SE_UDEV_PATH_LEN-1)) {
6708bb27 1305 pr_err("udev_path count: %d exceeds"
c66ac9db
NB		 1306 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1307 SE_UDEV_PATH_LEN-1);
1308 return -EINVAL;
1309 }
1310
0fd97ccf 1311 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
c66ac9db 1312 "%s", page);
3011684c
DC		 1313 if (!read_bytes)
1314 return -EINVAL;
0fd97ccf
CH		 1315 if (dev->udev_path[read_bytes - 1] == '\n')
1316 dev->udev_path[read_bytes - 1] = '\0';
0877eafd 1317
0fd97ccf 1318 dev->dev_flags |= DF_USING_UDEV_PATH;
3011684c 1319
6708bb27 1320 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
c66ac9db 1321 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1322 config_item_name(&dev->dev_group.cg_item),
1323 dev->udev_path);
c66ac9db
NB		 1324
1325 return read_bytes;
1326}
1327
1328static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1329 .attr = { .ca_owner = THIS_MODULE,
1330 .ca_name = "udev_path",
1331 .ca_mode = S_IRUGO | S_IWUSR },
1332 .show = target_core_show_dev_udev_path,
1333 .store = target_core_store_dev_udev_path,
1334};
1335
64146db7
AG		 1336static ssize_t target_core_show_dev_enable(void *p, char *page)
1337{
1338 struct se_device *dev = p;
1339
1340 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1341}
1342
c66ac9db
NB		 1343static ssize_t target_core_store_dev_enable(
1344 void *p,
1345 const char *page,
1346 size_t count)
1347{
0fd97ccf 1348 struct se_device *dev = p;
c66ac9db 1349 char *ptr;
0fd97ccf 1350 int ret;
c66ac9db
NB		 1351
1352 ptr = strstr(page, "1");
6708bb27
AG		 1353 if (!ptr) {
1354 pr_err("For dev_enable ops, only valid value"
c66ac9db
NB		 1355 " is \"1\"\n");
1356 return -EINVAL;
1357 }
c66ac9db 1358
0fd97ccf
CH		 1359 ret = target_configure_device(dev);
1360 if (ret)
1361 return ret;
c66ac9db
NB		 1362 return count;
1363}
1364
1365static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1366 .attr = { .ca_owner = THIS_MODULE,
1367 .ca_name = "enable",
64146db7
AG		 1368 .ca_mode = S_IRUGO | S_IWUSR },
1369 .show = target_core_show_dev_enable,
c66ac9db
NB		 1370 .store = target_core_store_dev_enable,
1371};
1372
1373static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1374{
0fd97ccf 1375 struct se_device *dev = p;
c66ac9db
NB		 1376 struct config_item *lu_ci;
1377 struct t10_alua_lu_gp *lu_gp;
1378 struct t10_alua_lu_gp_member *lu_gp_mem;
1379 ssize_t len = 0;
1380
c66ac9db 1381 lu_gp_mem = dev->dev_alua_lu_gp_mem;
c87fbd56
CH		 1382 if (!lu_gp_mem)
1383 return 0;
c66ac9db
NB		 1384
1385 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1386 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1387 if (lu_gp) {
c66ac9db
NB		 1388 lu_ci = &lu_gp->lu_gp_group.cg_item;
1389 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1390 config_item_name(lu_ci), lu_gp->lu_gp_id);
1391 }
1392 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1393
1394 return len;
1395}
1396
1397static ssize_t target_core_store_alua_lu_gp(
1398 void *p,
1399 const char *page,
1400 size_t count)
1401{
0fd97ccf
CH		 1402 struct se_device *dev = p;
1403 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1404 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1405 struct t10_alua_lu_gp_member *lu_gp_mem;
1406 unsigned char buf[LU_GROUP_NAME_BUF];
1407 int move = 0;
1408
c87fbd56
CH		 1409 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1410 if (!lu_gp_mem)
1411 return 0;
1412
c66ac9db 1413 if (count > LU_GROUP_NAME_BUF) {
6708bb27 1414 pr_err("ALUA LU Group Alias too large!\n");
c66ac9db
NB		 1415 return -EINVAL;
1416 }
1417 memset(buf, 0, LU_GROUP_NAME_BUF);
1418 memcpy(buf, page, count);
1419 /*
1420 * Any ALUA logical unit alias besides "NULL" means we will be
1421 * making a new group association.
1422 */
1423 if (strcmp(strstrip(buf), "NULL")) {
1424 /*
1425 * core_alua_get_lu_gp_by_name() will increment reference to
1426 * struct t10_alua_lu_gp. This reference is released with
1427 * core_alua_get_lu_gp_by_name below().
1428 */
1429 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
6708bb27 1430 if (!lu_gp_new)
c66ac9db
NB		 1431 return -ENODEV;
1432 }
c66ac9db
NB		 1433
1434 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1435 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1436 if (lu_gp) {
c66ac9db
NB		 1437 /*
1438 * Clearing an existing lu_gp association, and replacing
1439 * with NULL
1440 */
6708bb27
AG		 1441 if (!lu_gp_new) {
1442 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
c66ac9db
NB		 1443 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1444 " %hu\n",
1445 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1446 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 1447 config_item_name(&lu_gp->lu_gp_group.cg_item),
1448 lu_gp->lu_gp_id);
1449
1450 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1451 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1452
1453 return count;
1454 }
1455 /*
1456 * Removing existing association of lu_gp_mem with lu_gp
1457 */
1458 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1459 move = 1;
1460 }
1461 /*
1462 * Associate lu_gp_mem with lu_gp_new.
1463 */
1464 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1465 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1466
6708bb27 1467 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
c66ac9db
NB		 1468 " core/alua/lu_gps/%s, ID: %hu\n",
1469 (move) ? "Moving" : "Adding",
1470 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1471 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 1472 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1473 lu_gp_new->lu_gp_id);
1474
1475 core_alua_put_lu_gp_from_name(lu_gp_new);
1476 return count;
1477}
1478
1479static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1480 .attr = { .ca_owner = THIS_MODULE,
1481 .ca_name = "alua_lu_gp",
1482 .ca_mode = S_IRUGO | S_IWUSR },
1483 .show = target_core_show_alua_lu_gp,
1484 .store = target_core_store_alua_lu_gp,
1485};
1486
229d4f11
HR		 1487static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1488{
1489 struct se_device *dev = p;
1490 struct t10_alua_lba_map *map;
1491 struct t10_alua_lba_map_member *mem;
1492 char *b = page;
1493 int bl = 0;
1494 char state;
1495
1496 spin_lock(&dev->t10_alua.lba_map_lock);
1497 if (!list_empty(&dev->t10_alua.lba_map_list))
1498 bl += sprintf(b + bl, "%u %u\n",
1499 dev->t10_alua.lba_map_segment_size,
1500 dev->t10_alua.lba_map_segment_multiplier);
1501 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1502 bl += sprintf(b + bl, "%llu %llu",
1503 map->lba_map_first_lba, map->lba_map_last_lba);
1504 list_for_each_entry(mem, &map->lba_map_mem_list,
1505 lba_map_mem_list) {
1506 switch (mem->lba_map_mem_alua_state) {
1507 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1508 state = 'O';
1509 break;
1510 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1511 state = 'A';
1512 break;
1513 case ALUA_ACCESS_STATE_STANDBY:
1514 state = 'S';
1515 break;
1516 case ALUA_ACCESS_STATE_UNAVAILABLE:
1517 state = 'U';
1518 break;
1519 default:
1520 state = '.';
1521 break;
1522 }
1523 bl += sprintf(b + bl, " %d:%c",
1524 mem->lba_map_mem_alua_pg_id, state);
1525 }
1526 bl += sprintf(b + bl, "\n");
1527 }
1528 spin_unlock(&dev->t10_alua.lba_map_lock);
1529 return bl;
1530}
1531
1532static ssize_t target_core_store_dev_lba_map(
1533 void *p,
1534 const char *page,
1535 size_t count)
1536{
1537 struct se_device *dev = p;
1538 struct t10_alua_lba_map *lba_map = NULL;
1539 struct list_head lba_list;
1540 char *map_entries, *ptr;
1541 char state;
1542 int pg_num = -1, pg;
1543 int ret = 0, num = 0, pg_id, alua_state;
1544 unsigned long start_lba = -1, end_lba = -1;
1545 unsigned long segment_size = -1, segment_mult = -1;
1546
1547 map_entries = kstrdup(page, GFP_KERNEL);
1548 if (!map_entries)
1549 return -ENOMEM;
1550
1551 INIT_LIST_HEAD(&lba_list);
1552 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1553 if (!*ptr)
1554 continue;
1555
1556 if (num == 0) {
1557 if (sscanf(ptr, "%lu %lu\n",
1558 &segment_size, &segment_mult) != 2) {
1559 pr_err("Invalid line %d\n", num);
1560 ret = -EINVAL;
1561 break;
1562 }
1563 num++;
1564 continue;
1565 }
1566 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1567 pr_err("Invalid line %d\n", num);
1568 ret = -EINVAL;
1569 break;
1570 }
1571 ptr = strchr(ptr, ' ');
1572 if (!ptr) {
1573 pr_err("Invalid line %d, missing end lba\n", num);
1574 ret = -EINVAL;
1575 break;
1576 }
1577 ptr++;
1578 ptr = strchr(ptr, ' ');
1579 if (!ptr) {
1580 pr_err("Invalid line %d, missing state definitions\n",
1581 num);
1582 ret = -EINVAL;
1583 break;
1584 }
1585 ptr++;
1586 lba_map = core_alua_allocate_lba_map(&lba_list,
1587 start_lba, end_lba);
1588 if (IS_ERR(lba_map)) {
1589 ret = PTR_ERR(lba_map);
1590 break;
1591 }
1592 pg = 0;
1593 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1594 switch (state) {
1595 case 'O':
1596 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1597 break;
1598 case 'A':
1599 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1600 break;
1601 case 'S':
1602 alua_state = ALUA_ACCESS_STATE_STANDBY;
1603 break;
1604 case 'U':
1605 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1606 break;
1607 default:
1608 pr_err("Invalid ALUA state '%c'\n", state);
1609 ret = -EINVAL;
1610 goto out;
1611 }
1612
1613 ret = core_alua_allocate_lba_map_mem(lba_map,
1614 pg_id, alua_state);
1615 if (ret) {
1616 pr_err("Invalid target descriptor %d:%c "
1617 "at line %d\n",
1618 pg_id, state, num);
1619 break;
1620 }
1621 pg++;
1622 ptr = strchr(ptr, ' ');
1623 if (ptr)
1624 ptr++;
1625 else
1626 break;
1627 }
1628 if (pg_num == -1)
1629 pg_num = pg;
1630 else if (pg != pg_num) {
1631 pr_err("Only %d from %d port groups definitions "
1632 "at line %d\n", pg, pg_num, num);
1633 ret = -EINVAL;
1634 break;
1635 }
1636 num++;
1637 }
1638out:
1639 if (ret) {
1640 core_alua_free_lba_map(&lba_list);
1641 count = ret;
1642 } else
1643 core_alua_set_lba_map(dev, &lba_list,
1644 segment_size, segment_mult);
1645 kfree(map_entries);
1646 return count;
1647}
1648
1649static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1650 .attr = { .ca_owner = THIS_MODULE,
1651 .ca_name = "lba_map",
1652 .ca_mode = S_IRUGO | S_IWUSR },
1653 .show = target_core_show_dev_lba_map,
1654 .store = target_core_store_dev_lba_map,
1655};
1656
73112edc 1657static struct configfs_attribute *target_core_dev_attrs[] = {
c66ac9db
NB		 1658 &target_core_attr_dev_info.attr,
1659 &target_core_attr_dev_control.attr,
1660 &target_core_attr_dev_alias.attr,
1661 &target_core_attr_dev_udev_path.attr,
1662 &target_core_attr_dev_enable.attr,
1663 &target_core_attr_dev_alua_lu_gp.attr,
229d4f11 1664 &target_core_attr_dev_lba_map.attr,
c66ac9db
NB		 1665 NULL,
1666};
1667
1668static void target_core_dev_release(struct config_item *item)
1669{
0fd97ccf
CH		 1670 struct config_group *dev_cg = to_config_group(item);
1671 struct se_device *dev =
1672 container_of(dev_cg, struct se_device, dev_group);
c66ac9db 1673
c66ac9db 1674 kfree(dev_cg->default_groups);
0fd97ccf 1675 target_free_device(dev);
c66ac9db
NB		 1676}
1677
1678static ssize_t target_core_dev_show(struct config_item *item,
1679 struct configfs_attribute *attr,
1680 char *page)
1681{
0fd97ccf
CH		 1682 struct config_group *dev_cg = to_config_group(item);
1683 struct se_device *dev =
1684 container_of(dev_cg, struct se_device, dev_group);
c66ac9db
NB		 1685 struct target_core_configfs_attribute *tc_attr = container_of(
1686 attr, struct target_core_configfs_attribute, attr);
1687
6708bb27 1688 if (!tc_attr->show)
c66ac9db
NB		 1689 return -EINVAL;
1690
0fd97ccf 1691 return tc_attr->show(dev, page);
c66ac9db
NB		 1692}
1693
1694static ssize_t target_core_dev_store(struct config_item *item,
1695 struct configfs_attribute *attr,
1696 const char *page, size_t count)
1697{
0fd97ccf
CH		 1698 struct config_group *dev_cg = to_config_group(item);
1699 struct se_device *dev =
1700 container_of(dev_cg, struct se_device, dev_group);
c66ac9db
NB		 1701 struct target_core_configfs_attribute *tc_attr = container_of(
1702 attr, struct target_core_configfs_attribute, attr);
1703
6708bb27 1704 if (!tc_attr->store)
c66ac9db
NB		 1705 return -EINVAL;
1706
0fd97ccf 1707 return tc_attr->store(dev, page, count);
c66ac9db
NB		 1708}
1709
1710static struct configfs_item_operations target_core_dev_item_ops = {
1711 .release = target_core_dev_release,
1712 .show_attribute = target_core_dev_show,
1713 .store_attribute = target_core_dev_store,
1714};
1715
73112edc 1716TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
c66ac9db 1717
73112edc 1718/* End functions for struct config_item_type tb_dev_cit */
c66ac9db
NB		 1719
1720/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1721
1722CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1723#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1724static struct target_core_alua_lu_gp_attribute \
1725 target_core_alua_lu_gp_##_name = \
1726 __CONFIGFS_EATTR(_name, _mode, \
1727 target_core_alua_lu_gp_show_attr_##_name, \
1728 target_core_alua_lu_gp_store_attr_##_name);
1729
1730#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1731static struct target_core_alua_lu_gp_attribute \
1732 target_core_alua_lu_gp_##_name = \
1733 __CONFIGFS_EATTR_RO(_name, \
1734 target_core_alua_lu_gp_show_attr_##_name);
1735
1736/*
1737 * lu_gp_id
1738 */
1739static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1740 struct t10_alua_lu_gp *lu_gp,
1741 char *page)
1742{
6708bb27 1743 if (!lu_gp->lu_gp_valid_id)
c66ac9db
NB		 1744 return 0;
1745
1746 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1747}
1748
1749static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1750 struct t10_alua_lu_gp *lu_gp,
1751 const char *page,
1752 size_t count)
1753{
1754 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1755 unsigned long lu_gp_id;
1756 int ret;
1757
57103d7f 1758 ret = kstrtoul(page, 0, &lu_gp_id);
c66ac9db 1759 if (ret < 0) {
57103d7f 1760 pr_err("kstrtoul() returned %d for"
c66ac9db 1761 " lu_gp_id\n", ret);
57103d7f 1762 return ret;
c66ac9db
NB		 1763 }
1764 if (lu_gp_id > 0x0000ffff) {
6708bb27 1765 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 1766 " 0x0000ffff\n", lu_gp_id);
1767 return -EINVAL;
1768 }
1769
1770 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1771 if (ret < 0)
1772 return -EINVAL;
1773
6708bb27 1774 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
c66ac9db
NB		 1775 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1776 config_item_name(&alua_lu_gp_cg->cg_item),
1777 lu_gp->lu_gp_id);
1778
1779 return count;
1780}
1781
1782SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1783
1784/*
1785 * members
1786 */
1787static ssize_t target_core_alua_lu_gp_show_attr_members(
1788 struct t10_alua_lu_gp *lu_gp,
1789 char *page)
1790{
1791 struct se_device *dev;
1792 struct se_hba *hba;
c66ac9db
NB		 1793 struct t10_alua_lu_gp_member *lu_gp_mem;
1794 ssize_t len = 0, cur_len;
1795 unsigned char buf[LU_GROUP_NAME_BUF];
1796
1797 memset(buf, 0, LU_GROUP_NAME_BUF);
1798
1799 spin_lock(&lu_gp->lu_gp_lock);
1800 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1801 dev = lu_gp_mem->lu_gp_mem_dev;
0fd97ccf 1802 hba = dev->se_hba;
c66ac9db
NB		 1803
1804 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1805 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1806 config_item_name(&dev->dev_group.cg_item));
c66ac9db
NB		 1807 cur_len++; /* Extra byte for NULL terminator */
1808
1809 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 1810 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 1811 "_members buffer\n");
1812 break;
1813 }
1814 memcpy(page+len, buf, cur_len);
1815 len += cur_len;
1816 }
1817 spin_unlock(&lu_gp->lu_gp_lock);
1818
1819 return len;
1820}
1821
1822SE_DEV_ALUA_LU_ATTR_RO(members);
1823
1824CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1825
1826static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1827 &target_core_alua_lu_gp_lu_gp_id.attr,
1828 &target_core_alua_lu_gp_members.attr,
1829 NULL,
1830};
1831
1f6fe7cb
NB		 1832static void target_core_alua_lu_gp_release(struct config_item *item)
1833{
1834 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1835 struct t10_alua_lu_gp, lu_gp_group);
1836
1837 core_alua_free_lu_gp(lu_gp);
1838}
1839
c66ac9db 1840static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1f6fe7cb 1841 .release = target_core_alua_lu_gp_release,
c66ac9db
NB		 1842 .show_attribute = target_core_alua_lu_gp_attr_show,
1843 .store_attribute = target_core_alua_lu_gp_attr_store,
1844};
1845
1846static struct config_item_type target_core_alua_lu_gp_cit = {
1847 .ct_item_ops = &target_core_alua_lu_gp_ops,
1848 .ct_attrs = target_core_alua_lu_gp_attrs,
1849 .ct_owner = THIS_MODULE,
1850};
1851
1852/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1853
1854/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1855
1856static struct config_group *target_core_alua_create_lu_gp(
1857 struct config_group *group,
1858 const char *name)
1859{
1860 struct t10_alua_lu_gp *lu_gp;
1861 struct config_group *alua_lu_gp_cg = NULL;
1862 struct config_item *alua_lu_gp_ci = NULL;
1863
1864 lu_gp = core_alua_allocate_lu_gp(name, 0);
1865 if (IS_ERR(lu_gp))
1866 return NULL;
1867
1868 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1869 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1870
1871 config_group_init_type_name(alua_lu_gp_cg, name,
1872 &target_core_alua_lu_gp_cit);
1873
6708bb27 1874 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
c66ac9db
NB		 1875 " Group: core/alua/lu_gps/%s\n",
1876 config_item_name(alua_lu_gp_ci));
1877
1878 return alua_lu_gp_cg;
1879
1880}
1881
1882static void target_core_alua_drop_lu_gp(
1883 struct config_group *group,
1884 struct config_item *item)
1885{
1886 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1887 struct t10_alua_lu_gp, lu_gp_group);
1888
6708bb27 1889 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
c66ac9db
NB		 1890 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1891 config_item_name(item), lu_gp->lu_gp_id);
1f6fe7cb
NB		 1892 /*
1893 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1894 * -> target_core_alua_lu_gp_release()
1895 */
c66ac9db 1896 config_item_put(item);
c66ac9db
NB		 1897}
1898
1899static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1900 .make_group = &target_core_alua_create_lu_gp,
1901 .drop_item = &target_core_alua_drop_lu_gp,
1902};
1903
1904static struct config_item_type target_core_alua_lu_gps_cit = {
1905 .ct_item_ops = NULL,
1906 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1907 .ct_owner = THIS_MODULE,
1908};
1909
1910/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1911
1912/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1913
1914CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1915#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
1916static struct target_core_alua_tg_pt_gp_attribute \
1917 target_core_alua_tg_pt_gp_##_name = \
1918 __CONFIGFS_EATTR(_name, _mode, \
1919 target_core_alua_tg_pt_gp_show_attr_##_name, \
1920 target_core_alua_tg_pt_gp_store_attr_##_name);
1921
1922#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
1923static struct target_core_alua_tg_pt_gp_attribute \
1924 target_core_alua_tg_pt_gp_##_name = \
1925 __CONFIGFS_EATTR_RO(_name, \
1926 target_core_alua_tg_pt_gp_show_attr_##_name);
1927
1928/*
1929 * alua_access_state
1930 */
1931static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
1932 struct t10_alua_tg_pt_gp *tg_pt_gp,
1933 char *page)
1934{
1935 return sprintf(page, "%d\n",
1936 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
1937}
1938
1939static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
1940 struct t10_alua_tg_pt_gp *tg_pt_gp,
1941 const char *page,
1942 size_t count)
1943{
0fd97ccf 1944 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
c66ac9db
NB		 1945 unsigned long tmp;
1946 int new_state, ret;
1947
6708bb27 1948 if (!tg_pt_gp->tg_pt_gp_valid_id) {
125d0119 1949 pr_err("Unable to do implicit ALUA on non valid"
c66ac9db
NB		 1950 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
1951 return -EINVAL;
1952 }
f1453773
NB		 1953 if (!(dev->dev_flags & DF_CONFIGURED)) {
1954 pr_err("Unable to set alua_access_state while device is"
1955 " not configured\n");
1956 return -ENODEV;
1957 }
c66ac9db 1958
57103d7f 1959 ret = kstrtoul(page, 0, &tmp);
c66ac9db 1960 if (ret < 0) {
6708bb27 1961 pr_err("Unable to extract new ALUA access state from"
c66ac9db 1962 " %s\n", page);
57103d7f 1963 return ret;
c66ac9db
NB		 1964 }
1965 new_state = (int)tmp;
1966
125d0119
HR		 1967 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
1968 pr_err("Unable to process implicit configfs ALUA"
1969 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
c66ac9db
NB		 1970 return -EINVAL;
1971 }
c66094bf
HR		 1972 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
1973 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
1974 /* LBA DEPENDENT is only allowed with implicit ALUA */
1975 pr_err("Unable to process implicit configfs ALUA transition"
1976 " while explicit ALUA management is enabled\n");
1977 return -EINVAL;
1978 }
c66ac9db 1979
0fd97ccf 1980 ret = core_alua_do_port_transition(tg_pt_gp, dev,
c66ac9db
NB		 1981 NULL, NULL, new_state, 0);
1982 return (!ret) ? count : -EINVAL;
1983}
1984
1985SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
1986
1987/*
1988 * alua_access_status
1989 */
1990static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
1991 struct t10_alua_tg_pt_gp *tg_pt_gp,
1992 char *page)
1993{
1994 return sprintf(page, "%s\n",
1995 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
1996}
1997
1998static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
1999 struct t10_alua_tg_pt_gp *tg_pt_gp,
2000 const char *page,
2001 size_t count)
2002{
2003 unsigned long tmp;
2004 int new_status, ret;
2005
6708bb27
AG		 2006 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2007 pr_err("Unable to do set ALUA access status on non"
c66ac9db
NB		 2008 " valid tg_pt_gp ID: %hu\n",
2009 tg_pt_gp->tg_pt_gp_valid_id);
2010 return -EINVAL;
2011 }
2012
57103d7f 2013 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2014 if (ret < 0) {
6708bb27 2015 pr_err("Unable to extract new ALUA access status"
c66ac9db 2016 " from %s\n", page);
57103d7f 2017 return ret;
c66ac9db
NB		 2018 }
2019 new_status = (int)tmp;
2020
2021 if ((new_status != ALUA_STATUS_NONE) &&
125d0119
HR		 2022 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2023 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
6708bb27 2024 pr_err("Illegal ALUA access status: 0x%02x\n",
c66ac9db
NB		 2025 new_status);
2026 return -EINVAL;
2027 }
2028
2029 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2030 return count;
2031}
2032
2033SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2034
2035/*
2036 * alua_access_type
2037 */
2038static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2039 struct t10_alua_tg_pt_gp *tg_pt_gp,
2040 char *page)
2041{
2042 return core_alua_show_access_type(tg_pt_gp, page);
2043}
2044
2045static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2046 struct t10_alua_tg_pt_gp *tg_pt_gp,
2047 const char *page,
2048 size_t count)
2049{
2050 return core_alua_store_access_type(tg_pt_gp, page, count);
2051}
2052
2053SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2054
6be526c4
HR		 2055/*
2056 * alua_supported_states
2057 */
6be526c4 2058
b0a382c5
HR		 2059#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2060static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2061 struct t10_alua_tg_pt_gp *t, char *p) \
2062{ \
2063 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
6be526c4
HR		 2064}
2065
b0a382c5
HR		 2066#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2067static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2068 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2069{ \
2070 unsigned long tmp; \
2071 int ret; \
2072 \
2073 if (!t->tg_pt_gp_valid_id) { \
2074 pr_err("Unable to do set ##_name ALUA state on non" \
2075 " valid tg_pt_gp ID: %hu\n", \
2076 t->tg_pt_gp_valid_id); \
2077 return -EINVAL; \
2078 } \
2079 \
2080 ret = kstrtoul(p, 0, &tmp); \
2081 if (ret < 0) { \
2082 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2083 return -EINVAL; \
2084 } \
2085 if (tmp > 1) { \
2086 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2087 return -EINVAL; \
2088 } \
1f0b030c 2089 if (tmp) \
b0a382c5
HR		 2090 t->_var |= _bit; \
2091 else \
2092 t->_var &= ~_bit; \
2093 \
2094 return c; \
2095}
2096
2097SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2098 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2099SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2100 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2101SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2102
2103SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2104 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2105SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2106 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2107SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2108
2109SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2110 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2111SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2112 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
c66094bf 2113SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
b0a382c5
HR		 2114
2115SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2116 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2117SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2118 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2119SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2120
2121SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2122 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2123SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2124 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2125SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2126
2127SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2128 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2129SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2130 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2131SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2132
2133SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2134 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2135SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2136 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2137SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
6be526c4 2138
c66ac9db
NB		 2139/*
2140 * alua_write_metadata
2141 */
2142static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2143 struct t10_alua_tg_pt_gp *tg_pt_gp,
2144 char *page)
2145{
2146 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2147}
2148
2149static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2150 struct t10_alua_tg_pt_gp *tg_pt_gp,
2151 const char *page,
2152 size_t count)
2153{
2154 unsigned long tmp;
2155 int ret;
2156
57103d7f 2157 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2158 if (ret < 0) {
6708bb27 2159 pr_err("Unable to extract alua_write_metadata\n");
57103d7f 2160 return ret;
c66ac9db
NB		 2161 }
2162
2163 if ((tmp != 0) && (tmp != 1)) {
6708bb27 2164 pr_err("Illegal value for alua_write_metadata:"
c66ac9db
NB		 2165 " %lu\n", tmp);
2166 return -EINVAL;
2167 }
2168 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2169
2170 return count;
2171}
2172
2173SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2174
2175
2176
2177/*
2178 * nonop_delay_msecs
2179 */
2180static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2181 struct t10_alua_tg_pt_gp *tg_pt_gp,
2182 char *page)
2183{
2184 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2185
2186}
2187
2188static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2189 struct t10_alua_tg_pt_gp *tg_pt_gp,
2190 const char *page,
2191 size_t count)
2192{
2193 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2194}
2195
2196SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2197
2198/*
2199 * trans_delay_msecs
2200 */
2201static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2202 struct t10_alua_tg_pt_gp *tg_pt_gp,
2203 char *page)
2204{
2205 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2206}
2207
2208static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2209 struct t10_alua_tg_pt_gp *tg_pt_gp,
2210 const char *page,
2211 size_t count)
2212{
2213 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2214}
2215
2216SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2217
5b9a4d72 2218/*
125d0119 2219 * implicit_trans_secs
5b9a4d72 2220 */
125d0119 2221static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
5b9a4d72
NB		 2222 struct t10_alua_tg_pt_gp *tg_pt_gp,
2223 char *page)
2224{
125d0119 2225 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
5b9a4d72
NB		 2226}
2227
125d0119 2228static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
5b9a4d72
NB		 2229 struct t10_alua_tg_pt_gp *tg_pt_gp,
2230 const char *page,
2231 size_t count)
2232{
125d0119 2233 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
5b9a4d72
NB		 2234}
2235
125d0119 2236SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
5b9a4d72 2237
c66ac9db
NB		 2238/*
2239 * preferred
2240 */
2241
2242static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2243 struct t10_alua_tg_pt_gp *tg_pt_gp,
2244 char *page)
2245{
2246 return core_alua_show_preferred_bit(tg_pt_gp, page);
2247}
2248
2249static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2250 struct t10_alua_tg_pt_gp *tg_pt_gp,
2251 const char *page,
2252 size_t count)
2253{
2254 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2255}
2256
2257SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2258
2259/*
2260 * tg_pt_gp_id
2261 */
2262static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2263 struct t10_alua_tg_pt_gp *tg_pt_gp,
2264 char *page)
2265{
6708bb27 2266 if (!tg_pt_gp->tg_pt_gp_valid_id)
c66ac9db
NB		 2267 return 0;
2268
2269 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2270}
2271
2272static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2273 struct t10_alua_tg_pt_gp *tg_pt_gp,
2274 const char *page,
2275 size_t count)
2276{
2277 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2278 unsigned long tg_pt_gp_id;
2279 int ret;
2280
57103d7f 2281 ret = kstrtoul(page, 0, &tg_pt_gp_id);
c66ac9db 2282 if (ret < 0) {
57103d7f 2283 pr_err("kstrtoul() returned %d for"
c66ac9db 2284 " tg_pt_gp_id\n", ret);
57103d7f 2285 return ret;
c66ac9db
NB		 2286 }
2287 if (tg_pt_gp_id > 0x0000ffff) {
6708bb27 2288 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2289 " 0x0000ffff\n", tg_pt_gp_id);
2290 return -EINVAL;
2291 }
2292
2293 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2294 if (ret < 0)
2295 return -EINVAL;
2296
6708bb27 2297 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
c66ac9db
NB		 2298 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2299 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2300 tg_pt_gp->tg_pt_gp_id);
2301
2302 return count;
2303}
2304
2305SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2306
2307/*
2308 * members
2309 */
2310static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2311 struct t10_alua_tg_pt_gp *tg_pt_gp,
2312 char *page)
2313{
2314 struct se_port *port;
2315 struct se_portal_group *tpg;
2316 struct se_lun *lun;
2317 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2318 ssize_t len = 0, cur_len;
2319 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2320
2321 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2322
2323 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2324 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2325 tg_pt_gp_mem_list) {
2326 port = tg_pt_gp_mem->tg_pt;
2327 tpg = port->sep_tpg;
2328 lun = port->sep_lun;
2329
2330 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
e3d6f909
AG		 2331 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2332 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2333 tpg->se_tpg_tfo->tpg_get_tag(tpg),
c66ac9db
NB		 2334 config_item_name(&lun->lun_group.cg_item));
2335 cur_len++; /* Extra byte for NULL terminator */
2336
2337 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2338 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2339 "_members buffer\n");
2340 break;
2341 }
2342 memcpy(page+len, buf, cur_len);
2343 len += cur_len;
2344 }
2345 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2346
2347 return len;
2348}
2349
2350SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2351
2352CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2353 tg_pt_gp_group);
2354
2355static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2356 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2357 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2358 &target_core_alua_tg_pt_gp_alua_access_type.attr,
b0a382c5
HR		 2359 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2360 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2361 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2362 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2363 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2364 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2365 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
c66ac9db
NB		 2366 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2367 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2368 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
125d0119 2369 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
c66ac9db
NB		 2370 &target_core_alua_tg_pt_gp_preferred.attr,
2371 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2372 &target_core_alua_tg_pt_gp_members.attr,
2373 NULL,
2374};
2375
1f6fe7cb
NB		 2376static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2377{
2378 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2379 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2380
2381 core_alua_free_tg_pt_gp(tg_pt_gp);
2382}
2383
c66ac9db 2384static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
1f6fe7cb 2385 .release = target_core_alua_tg_pt_gp_release,
c66ac9db
NB		 2386 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2387 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2388};
2389
2390static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2391 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2392 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2393 .ct_owner = THIS_MODULE,
2394};
2395
2396/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2397
72aca57b 2398/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
c66ac9db
NB		 2399
2400static struct config_group *target_core_alua_create_tg_pt_gp(
2401 struct config_group *group,
2402 const char *name)
2403{
2404 struct t10_alua *alua = container_of(group, struct t10_alua,
2405 alua_tg_pt_gps_group);
2406 struct t10_alua_tg_pt_gp *tg_pt_gp;
c66ac9db
NB		 2407 struct config_group *alua_tg_pt_gp_cg = NULL;
2408 struct config_item *alua_tg_pt_gp_ci = NULL;
2409
0fd97ccf 2410 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
6708bb27 2411 if (!tg_pt_gp)
c66ac9db
NB		 2412 return NULL;
2413
2414 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2415 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2416
2417 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2418 &target_core_alua_tg_pt_gp_cit);
2419
6708bb27 2420 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
c66ac9db
NB		 2421 " Group: alua/tg_pt_gps/%s\n",
2422 config_item_name(alua_tg_pt_gp_ci));
2423
2424 return alua_tg_pt_gp_cg;
2425}
2426
2427static void target_core_alua_drop_tg_pt_gp(
2428 struct config_group *group,
2429 struct config_item *item)
2430{
2431 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2432 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2433
6708bb27 2434 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
c66ac9db
NB		 2435 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2436 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
1f6fe7cb
NB		 2437 /*
2438 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2439 * -> target_core_alua_tg_pt_gp_release().
2440 */
c66ac9db 2441 config_item_put(item);
c66ac9db
NB		 2442}
2443
2444static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2445 .make_group = &target_core_alua_create_tg_pt_gp,
2446 .drop_item = &target_core_alua_drop_tg_pt_gp,
2447};
2448
72aca57b 2449TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
c66ac9db 2450
72aca57b 2451/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
c66ac9db
NB		 2452
2453/* Start functions for struct config_item_type target_core_alua_cit */
2454
2455/*
2456 * target_core_alua_cit is a ConfigFS group that lives under
2457 * /sys/kernel/config/target/core/alua. There are default groups
2458 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2459 * target_core_alua_cit in target_core_init_configfs() below.
2460 */
2461static struct config_item_type target_core_alua_cit = {
2462 .ct_item_ops = NULL,
2463 .ct_attrs = NULL,
2464 .ct_owner = THIS_MODULE,
2465};
2466
2467/* End functions for struct config_item_type target_core_alua_cit */
2468
d23ab570 2469/* Start functions for struct config_item_type tb_dev_stat_cit */
12d23384
NB		 2470
2471static struct config_group *target_core_stat_mkdir(
2472 struct config_group *group,
2473 const char *name)
2474{
2475 return ERR_PTR(-ENOSYS);
2476}
2477
2478static void target_core_stat_rmdir(
2479 struct config_group *group,
2480 struct config_item *item)
2481{
2482 return;
2483}
2484
2485static struct configfs_group_operations target_core_stat_group_ops = {
2486 .make_group = &target_core_stat_mkdir,
2487 .drop_item = &target_core_stat_rmdir,
2488};
2489
d23ab570 2490TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
12d23384 2491
d23ab570 2492/* End functions for struct config_item_type tb_dev_stat_cit */
12d23384 2493
c66ac9db
NB		 2494/* Start functions for struct config_item_type target_core_hba_cit */
2495
2496static struct config_group *target_core_make_subdev(
2497 struct config_group *group,
2498 const char *name)
2499{
2500 struct t10_alua_tg_pt_gp *tg_pt_gp;
c66ac9db
NB		 2501 struct se_subsystem_api *t;
2502 struct config_item *hba_ci = &group->cg_item;
2503 struct se_hba *hba = item_to_hba(hba_ci);
0fd97ccf 2504 struct se_device *dev;
c66ac9db 2505 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
12d23384
NB		 2506 struct config_group *dev_stat_grp = NULL;
2507 int errno = -ENOMEM, ret;
c66ac9db 2508
12d23384
NB		 2509 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2510 if (ret)
2511 return ERR_PTR(ret);
c66ac9db
NB		 2512 /*
2513 * Locate the struct se_subsystem_api from parent's struct se_hba.
2514 */
2515 t = hba->transport;
2516
0fd97ccf
CH		 2517 dev = target_alloc_device(hba, name);
2518 if (!dev)
2519 goto out_unlock;
2520
2521 dev_cg = &dev->dev_group;
c66ac9db 2522
13f6a914 2523 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
c66ac9db 2524 GFP_KERNEL);
6708bb27 2525 if (!dev_cg->default_groups)
0fd97ccf 2526 goto out_free_device;
c66ac9db 2527
73112edc 2528 config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
0fd97ccf 2529 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
f79a897e 2530 &t->tb_cits.tb_dev_attrib_cit);
0fd97ccf 2531 config_group_init_type_name(&dev->dev_pr_group, "pr",
91e2e39b 2532 &t->tb_cits.tb_dev_pr_cit);
0fd97ccf 2533 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
f8d389c6 2534 &t->tb_cits.tb_dev_wwn_cit);
0fd97ccf 2535 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
72aca57b 2536 "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
0fd97ccf 2537 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
d23ab570 2538 "statistics", &t->tb_cits.tb_dev_stat_cit);
12d23384 2539
0fd97ccf
CH		 2540 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2541 dev_cg->default_groups[1] = &dev->dev_pr_group;
2542 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2543 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2544 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
12d23384 2545 dev_cg->default_groups[5] = NULL;
c66ac9db 2546 /*
12d23384 2547 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
c66ac9db 2548 */
0fd97ccf 2549 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
6708bb27 2550 if (!tg_pt_gp)
0fd97ccf
CH		 2551 goto out_free_dev_cg_default_groups;
2552 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
c66ac9db 2553
0fd97ccf 2554 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
13f6a914 2555 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2556 GFP_KERNEL);
6708bb27
AG		 2557 if (!tg_pt_gp_cg->default_groups) {
2558 pr_err("Unable to allocate tg_pt_gp_cg->"
c66ac9db 2559 "default_groups\n");
0fd97ccf 2560 goto out_free_tg_pt_gp;
c66ac9db
NB		 2561 }
2562
2563 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2564 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2565 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2566 tg_pt_gp_cg->default_groups[1] = NULL;
12d23384
NB		 2567 /*
2568 * Add core/$HBA/$DEV/statistics/ default groups
2569 */
0fd97ccf 2570 dev_stat_grp = &dev->dev_stat_grps.stat_group;
13f6a914 2571 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
12d23384
NB		 2572 GFP_KERNEL);
2573 if (!dev_stat_grp->default_groups) {
6708bb27 2574 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
0fd97ccf 2575 goto out_free_tg_pt_gp_cg_default_groups;
12d23384 2576 }
0fd97ccf 2577 target_stat_setup_dev_default_groups(dev);
c66ac9db
NB		 2578
2579 mutex_unlock(&hba->hba_access_mutex);
0fd97ccf
CH		 2580 return dev_cg;
2581
2582out_free_tg_pt_gp_cg_default_groups:
2583 kfree(tg_pt_gp_cg->default_groups);
2584out_free_tg_pt_gp:
2585 core_alua_free_tg_pt_gp(tg_pt_gp);
2586out_free_dev_cg_default_groups:
2587 kfree(dev_cg->default_groups);
2588out_free_device:
2589 target_free_device(dev);
2590out_unlock:
c66ac9db 2591 mutex_unlock(&hba->hba_access_mutex);
12d23384 2592 return ERR_PTR(errno);
c66ac9db
NB		 2593}
2594
2595static void target_core_drop_subdev(
2596 struct config_group *group,
2597 struct config_item *item)
2598{
0fd97ccf
CH		 2599 struct config_group *dev_cg = to_config_group(item);
2600 struct se_device *dev =
2601 container_of(dev_cg, struct se_device, dev_group);
c66ac9db 2602 struct se_hba *hba;
c66ac9db 2603 struct config_item *df_item;
0fd97ccf 2604 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
1f6fe7cb 2605 int i;
c66ac9db 2606
0fd97ccf 2607 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
c66ac9db 2608
1f6fe7cb 2609 mutex_lock(&hba->hba_access_mutex);
c66ac9db 2610
0fd97ccf 2611 dev_stat_grp = &dev->dev_stat_grps.stat_group;
12d23384
NB		 2612 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2613 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2614 dev_stat_grp->default_groups[i] = NULL;
2615 config_item_put(df_item);
2616 }
2617 kfree(dev_stat_grp->default_groups);
2618
0fd97ccf 2619 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2620 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2621 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2622 tg_pt_gp_cg->default_groups[i] = NULL;
2623 config_item_put(df_item);
2624 }
2625 kfree(tg_pt_gp_cg->default_groups);
1f6fe7cb
NB		 2626 /*
2627 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2628 * directly from target_core_alua_tg_pt_gp_release().
2629 */
0fd97ccf 2630 dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db 2631
c66ac9db
NB		 2632 for (i = 0; dev_cg->default_groups[i]; i++) {
2633 df_item = &dev_cg->default_groups[i]->cg_item;
2634 dev_cg->default_groups[i] = NULL;
2635 config_item_put(df_item);
2636 }
c66ac9db 2637 /*
0fd97ccf 2638 * se_dev is released from target_core_dev_item_ops->release()
c66ac9db 2639 */
1f6fe7cb 2640 config_item_put(item);
c66ac9db 2641 mutex_unlock(&hba->hba_access_mutex);
c66ac9db
NB		 2642}
2643
2644static struct configfs_group_operations target_core_hba_group_ops = {
2645 .make_group = target_core_make_subdev,
2646 .drop_item = target_core_drop_subdev,
2647};
2648
2649CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2650#define SE_HBA_ATTR(_name, _mode) \
2651static struct target_core_hba_attribute \
2652 target_core_hba_##_name = \
2653 __CONFIGFS_EATTR(_name, _mode, \
2654 target_core_hba_show_attr_##_name, \
2655 target_core_hba_store_attr_##_name);
2656
2657#define SE_HBA_ATTR_RO(_name) \
2658static struct target_core_hba_attribute \
2659 target_core_hba_##_name = \
2660 __CONFIGFS_EATTR_RO(_name, \
2661 target_core_hba_show_attr_##_name);
2662
2663static ssize_t target_core_hba_show_attr_hba_info(
2664 struct se_hba *hba,
2665 char *page)
2666{
2667 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2668 hba->hba_id, hba->transport->name,
2669 TARGET_CORE_CONFIGFS_VERSION);
2670}
2671
2672SE_HBA_ATTR_RO(hba_info);
2673
2674static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2675 char *page)
2676{
2677 int hba_mode = 0;
2678
2679 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2680 hba_mode = 1;
2681
2682 return sprintf(page, "%d\n", hba_mode);
2683}
2684
2685static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2686 const char *page, size_t count)
2687{
2688 struct se_subsystem_api *transport = hba->transport;
2689 unsigned long mode_flag;
2690 int ret;
2691
2692 if (transport->pmode_enable_hba == NULL)
2693 return -EINVAL;
2694
57103d7f 2695 ret = kstrtoul(page, 0, &mode_flag);
c66ac9db 2696 if (ret < 0) {
6708bb27 2697 pr_err("Unable to extract hba mode flag: %d\n", ret);
57103d7f 2698 return ret;
c66ac9db
NB		 2699 }
2700
0fd97ccf 2701 if (hba->dev_count) {
6708bb27 2702 pr_err("Unable to set hba_mode with active devices\n");
c66ac9db
NB		 2703 return -EINVAL;
2704 }
c66ac9db
NB		 2705
2706 ret = transport->pmode_enable_hba(hba, mode_flag);
2707 if (ret < 0)
2708 return -EINVAL;
2709 if (ret > 0)
2710 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2711 else if (ret == 0)
2712 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2713
2714 return count;
2715}
2716
2717SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2718
2719CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2720
1f6fe7cb
NB		 2721static void target_core_hba_release(struct config_item *item)
2722{
2723 struct se_hba *hba = container_of(to_config_group(item),
2724 struct se_hba, hba_group);
2725 core_delete_hba(hba);
2726}
2727
c66ac9db
NB		 2728static struct configfs_attribute *target_core_hba_attrs[] = {
2729 &target_core_hba_hba_info.attr,
2730 &target_core_hba_hba_mode.attr,
2731 NULL,
2732};
2733
2734static struct configfs_item_operations target_core_hba_item_ops = {
1f6fe7cb 2735 .release = target_core_hba_release,
c66ac9db
NB		 2736 .show_attribute = target_core_hba_attr_show,
2737 .store_attribute = target_core_hba_attr_store,
2738};
2739
2740static struct config_item_type target_core_hba_cit = {
2741 .ct_item_ops = &target_core_hba_item_ops,
2742 .ct_group_ops = &target_core_hba_group_ops,
2743 .ct_attrs = target_core_hba_attrs,
2744 .ct_owner = THIS_MODULE,
2745};
2746
2747static struct config_group *target_core_call_addhbatotarget(
2748 struct config_group *group,
2749 const char *name)
2750{
2751 char *se_plugin_str, *str, *str2;
2752 struct se_hba *hba;
2753 char buf[TARGET_CORE_NAME_MAX_LEN];
2754 unsigned long plugin_dep_id = 0;
2755 int ret;
2756
2757 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
60d645a4 2758 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
6708bb27 2759 pr_err("Passed *name strlen(): %d exceeds"
c66ac9db
NB		 2760 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2761 TARGET_CORE_NAME_MAX_LEN);
2762 return ERR_PTR(-ENAMETOOLONG);
2763 }
2764 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2765
2766 str = strstr(buf, "_");
6708bb27
AG		 2767 if (!str) {
2768 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
c66ac9db
NB		 2769 return ERR_PTR(-EINVAL);
2770 }
2771 se_plugin_str = buf;
2772 /*
2773 * Special case for subsystem plugins that have "_" in their names.
2774 * Namely rd_direct and rd_mcp..
2775 */
2776 str2 = strstr(str+1, "_");
6708bb27 2777 if (str2) {
c66ac9db
NB		 2778 *str2 = '\0'; /* Terminate for *se_plugin_str */
2779 str2++; /* Skip to start of plugin dependent ID */
2780 str = str2;
2781 } else {
2782 *str = '\0'; /* Terminate for *se_plugin_str */
2783 str++; /* Skip to start of plugin dependent ID */
2784 }
2785
57103d7f 2786 ret = kstrtoul(str, 0, &plugin_dep_id);
c66ac9db 2787 if (ret < 0) {
57103d7f 2788 pr_err("kstrtoul() returned %d for"
c66ac9db 2789 " plugin_dep_id\n", ret);
57103d7f 2790 return ERR_PTR(ret);
c66ac9db
NB		 2791 }
2792 /*
2793 * Load up TCM subsystem plugins if they have not already been loaded.
2794 */
dbc5623e 2795 transport_subsystem_check_init();
c66ac9db
NB		 2796
2797 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2798 if (IS_ERR(hba))
2799 return ERR_CAST(hba);
2800
2801 config_group_init_type_name(&hba->hba_group, name,
2802 &target_core_hba_cit);
2803
2804 return &hba->hba_group;
2805}
2806
2807static void target_core_call_delhbafromtarget(
2808 struct config_group *group,
2809 struct config_item *item)
2810{
1f6fe7cb
NB		 2811 /*
2812 * core_delete_hba() is called from target_core_hba_item_ops->release()
2813 * -> target_core_hba_release()
2814 */
c66ac9db 2815 config_item_put(item);
c66ac9db
NB		 2816}
2817
2818static struct configfs_group_operations target_core_group_ops = {
2819 .make_group = target_core_call_addhbatotarget,
2820 .drop_item = target_core_call_delhbafromtarget,
2821};
2822
2823static struct config_item_type target_core_cit = {
2824 .ct_item_ops = NULL,
2825 .ct_group_ops = &target_core_group_ops,
2826 .ct_attrs = NULL,
2827 .ct_owner = THIS_MODULE,
2828};
2829
2830/* Stop functions for struct config_item_type target_core_hba_cit */
2831
73112edc
NB		 2832void target_core_setup_sub_cits(struct se_subsystem_api *sa)
2833{
2834 target_core_setup_dev_cit(sa);
f79a897e 2835 target_core_setup_dev_attrib_cit(sa);
91e2e39b 2836 target_core_setup_dev_pr_cit(sa);
f8d389c6 2837 target_core_setup_dev_wwn_cit(sa);
72aca57b 2838 target_core_setup_dev_alua_tg_pt_gps_cit(sa);
d23ab570 2839 target_core_setup_dev_stat_cit(sa);
73112edc
NB		 2840}
2841EXPORT_SYMBOL(target_core_setup_sub_cits);
2842
54550fab 2843static int __init target_core_init_configfs(void)
c66ac9db
NB		 2844{
2845 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2846 struct config_group *lu_gp_cg = NULL;
d588cf8f 2847 struct configfs_subsystem *subsys = &target_core_fabrics;
c66ac9db
NB		 2848 struct t10_alua_lu_gp *lu_gp;
2849 int ret;
2850
6708bb27 2851 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
c66ac9db
NB		 2852 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2853 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2854
c66ac9db
NB		 2855 config_group_init(&subsys->su_group);
2856 mutex_init(&subsys->su_mutex);
2857
e3d6f909 2858 ret = init_se_kmem_caches();
c66ac9db 2859 if (ret < 0)
e3d6f909 2860 return ret;
c66ac9db
NB		 2861 /*
2862 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2863 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2864 */
2865 target_cg = &subsys->su_group;
ab6dae82 2866 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2867 GFP_KERNEL);
6708bb27
AG		 2868 if (!target_cg->default_groups) {
2869 pr_err("Unable to allocate target_cg->default_groups\n");
37bb7899 2870 ret = -ENOMEM;
c66ac9db
NB		 2871 goto out_global;
2872 }
2873
e3d6f909 2874 config_group_init_type_name(&target_core_hbagroup,
c66ac9db 2875 "core", &target_core_cit);
e3d6f909 2876 target_cg->default_groups[0] = &target_core_hbagroup;
c66ac9db
NB		 2877 target_cg->default_groups[1] = NULL;
2878 /*
2879 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2880 */
e3d6f909 2881 hba_cg = &target_core_hbagroup;
13f6a914 2882 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2883 GFP_KERNEL);
6708bb27
AG		 2884 if (!hba_cg->default_groups) {
2885 pr_err("Unable to allocate hba_cg->default_groups\n");
37bb7899 2886 ret = -ENOMEM;
c66ac9db
NB		 2887 goto out_global;
2888 }
e3d6f909 2889 config_group_init_type_name(&alua_group,
c66ac9db 2890 "alua", &target_core_alua_cit);
e3d6f909 2891 hba_cg->default_groups[0] = &alua_group;
c66ac9db
NB		 2892 hba_cg->default_groups[1] = NULL;
2893 /*
2894 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2895 * groups under /sys/kernel/config/target/core/alua/
2896 */
e3d6f909 2897 alua_cg = &alua_group;
13f6a914 2898 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2899 GFP_KERNEL);
6708bb27
AG		 2900 if (!alua_cg->default_groups) {
2901 pr_err("Unable to allocate alua_cg->default_groups\n");
37bb7899 2902 ret = -ENOMEM;
c66ac9db
NB		 2903 goto out_global;
2904 }
2905
e3d6f909 2906 config_group_init_type_name(&alua_lu_gps_group,
c66ac9db 2907 "lu_gps", &target_core_alua_lu_gps_cit);
e3d6f909 2908 alua_cg->default_groups[0] = &alua_lu_gps_group;
c66ac9db
NB		 2909 alua_cg->default_groups[1] = NULL;
2910 /*
2911 * Add core/alua/lu_gps/default_lu_gp
2912 */
2913 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
37bb7899
PST		 2914 if (IS_ERR(lu_gp)) {
2915 ret = -ENOMEM;
c66ac9db 2916 goto out_global;
37bb7899 2917 }
c66ac9db 2918
e3d6f909 2919 lu_gp_cg = &alua_lu_gps_group;
13f6a914 2920 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2921 GFP_KERNEL);
6708bb27
AG		 2922 if (!lu_gp_cg->default_groups) {
2923 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
37bb7899 2924 ret = -ENOMEM;
c66ac9db
NB		 2925 goto out_global;
2926 }
2927
2928 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2929 &target_core_alua_lu_gp_cit);
2930 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2931 lu_gp_cg->default_groups[1] = NULL;
e3d6f909 2932 default_lu_gp = lu_gp;
c66ac9db
NB		 2933 /*
2934 * Register the target_core_mod subsystem with configfs.
2935 */
2936 ret = configfs_register_subsystem(subsys);
2937 if (ret < 0) {
6708bb27 2938 pr_err("Error %d while registering subsystem %s\n",
c66ac9db
NB		 2939 ret, subsys->su_group.cg_item.ci_namebuf);
2940 goto out_global;
2941 }
6708bb27 2942 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
c66ac9db
NB		 2943 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2944 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2945 /*
2946 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2947 */
2948 ret = rd_module_init();
2949 if (ret < 0)
2950 goto out;
2951
0d0f9dfb
RD		 2952 ret = core_dev_setup_virtual_lun0();
2953 if (ret < 0)
c66ac9db
NB		 2954 goto out;
2955
f99715ac
NB		 2956 ret = target_xcopy_setup_pt();
2957 if (ret < 0)
2958 goto out;
2959
c66ac9db
NB		 2960 return 0;
2961
2962out:
2963 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 2964 core_dev_release_virtual_lun0();
2965 rd_module_exit();
2966out_global:
e3d6f909
AG		 2967 if (default_lu_gp) {
2968 core_alua_free_lu_gp(default_lu_gp);
2969 default_lu_gp = NULL;
c66ac9db
NB		 2970 }
2971 if (lu_gp_cg)
2972 kfree(lu_gp_cg->default_groups);
2973 if (alua_cg)
2974 kfree(alua_cg->default_groups);
2975 if (hba_cg)
2976 kfree(hba_cg->default_groups);
2977 kfree(target_cg->default_groups);
e3d6f909
AG		 2978 release_se_kmem_caches();
2979 return ret;
c66ac9db
NB		 2980}
2981
54550fab 2982static void __exit target_core_exit_configfs(void)
c66ac9db 2983{
c66ac9db
NB		 2984 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2985 struct config_item *item;
2986 int i;
2987
e3d6f909 2988 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 2989 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2990 item = &lu_gp_cg->default_groups[i]->cg_item;
2991 lu_gp_cg->default_groups[i] = NULL;
2992 config_item_put(item);
2993 }
2994 kfree(lu_gp_cg->default_groups);
7c2bf6e9 2995 lu_gp_cg->default_groups = NULL;
c66ac9db 2996
e3d6f909 2997 alua_cg = &alua_group;
c66ac9db
NB		 2998 for (i = 0; alua_cg->default_groups[i]; i++) {
2999 item = &alua_cg->default_groups[i]->cg_item;
3000 alua_cg->default_groups[i] = NULL;
3001 config_item_put(item);
3002 }
3003 kfree(alua_cg->default_groups);
7c2bf6e9 3004 alua_cg->default_groups = NULL;
c66ac9db 3005
e3d6f909 3006 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3007 for (i = 0; hba_cg->default_groups[i]; i++) {
3008 item = &hba_cg->default_groups[i]->cg_item;
3009 hba_cg->default_groups[i] = NULL;
3010 config_item_put(item);
3011 }
3012 kfree(hba_cg->default_groups);
7c2bf6e9
NB		 3013 hba_cg->default_groups = NULL;
3014 /*
3015 * We expect subsys->su_group.default_groups to be released
3016 * by configfs subsystem provider logic..
3017 */
d588cf8f
CH		 3018 configfs_unregister_subsystem(&target_core_fabrics);
3019 kfree(target_core_fabrics.su_group.default_groups);
c66ac9db 3020
e3d6f909
AG		 3021 core_alua_free_lu_gp(default_lu_gp);
3022 default_lu_gp = NULL;
7c2bf6e9 3023
6708bb27 3024 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
c66ac9db
NB		 3025 " Infrastructure\n");
3026
c66ac9db
NB		 3027 core_dev_release_virtual_lun0();
3028 rd_module_exit();
f99715ac 3029 target_xcopy_release_pt();
e3d6f909 3030 release_se_kmem_caches();
c66ac9db
NB		 3031}
3032
3033MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3034MODULE_AUTHOR("nab@Linux-iSCSI.org");
3035MODULE_LICENSE("GPL");
3036
3037module_init(target_core_init_configfs);
3038module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
This page took 0.368556 seconds and 5 git commands to generate.