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target_core_alua: Make supported states configurable
[linux-2.6-block.git] / drivers / target / target_core_configfs.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
4c76251e 6 * (c) Copyright 2008-2013 Datera, Inc.
c66ac9db
NB		 7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23#include <linux/module.h>
24#include <linux/moduleparam.h>
c66ac9db
NB		 25#include <generated/utsrelease.h>
26#include <linux/utsname.h>
27#include <linux/init.h>
28#include <linux/fs.h>
29#include <linux/namei.h>
30#include <linux/slab.h>
31#include <linux/types.h>
32#include <linux/delay.h>
33#include <linux/unistd.h>
34#include <linux/string.h>
35#include <linux/parser.h>
36#include <linux/syscalls.h>
37#include <linux/configfs.h>
e3d6f909 38#include <linux/spinlock.h>
c66ac9db
NB		 39
40#include <target/target_core_base.h>
c4795fb2
CH		 41#include <target/target_core_backend.h>
42#include <target/target_core_fabric.h>
c66ac9db
NB		 43#include <target/target_core_fabric_configfs.h>
44#include <target/target_core_configfs.h>
45#include <target/configfs_macros.h>
46
e26d99ae 47#include "target_core_internal.h"
c66ac9db 48#include "target_core_alua.h"
c66ac9db
NB		 49#include "target_core_pr.h"
50#include "target_core_rd.h"
f99715ac 51#include "target_core_xcopy.h"
c66ac9db 52
e3d6f909
AG		 53extern struct t10_alua_lu_gp *default_lu_gp;
54
d0f474e5
RD		 55static LIST_HEAD(g_tf_list);
56static DEFINE_MUTEX(g_tf_lock);
c66ac9db
NB		 57
58struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62};
63
e3d6f909
AG		 64static struct config_group target_core_hbagroup;
65static struct config_group alua_group;
66static struct config_group alua_lu_gps_group;
67
c66ac9db
NB		 68static inline struct se_hba *
69item_to_hba(struct config_item *item)
70{
71 return container_of(to_config_group(item), struct se_hba, hba_group);
72}
73
74/*
75 * Attributes for /sys/kernel/config/target/
76 */
77static ssize_t target_core_attr_show(struct config_item *item,
78 struct configfs_attribute *attr,
79 char *page)
80{
81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
83 utsname()->sysname, utsname()->machine);
84}
85
86static struct configfs_item_operations target_core_fabric_item_ops = {
87 .show_attribute = target_core_attr_show,
88};
89
90static struct configfs_attribute target_core_item_attr_version = {
91 .ca_owner = THIS_MODULE,
92 .ca_name = "version",
93 .ca_mode = S_IRUGO,
94};
95
96static struct target_fabric_configfs *target_core_get_fabric(
97 const char *name)
98{
99 struct target_fabric_configfs *tf;
100
6708bb27 101 if (!name)
c66ac9db
NB		 102 return NULL;
103
104 mutex_lock(&g_tf_lock);
105 list_for_each_entry(tf, &g_tf_list, tf_list) {
6708bb27 106 if (!strcmp(tf->tf_name, name)) {
c66ac9db
NB		 107 atomic_inc(&tf->tf_access_cnt);
108 mutex_unlock(&g_tf_lock);
109 return tf;
110 }
111 }
112 mutex_unlock(&g_tf_lock);
113
114 return NULL;
115}
116
117/*
118 * Called from struct target_core_group_ops->make_group()
119 */
120static struct config_group *target_core_register_fabric(
121 struct config_group *group,
122 const char *name)
123{
124 struct target_fabric_configfs *tf;
125 int ret;
126
6708bb27 127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
c66ac9db 128 " %s\n", group, name);
c66ac9db
NB		 129 /*
130 * Below are some hardcoded request_module() calls to automatically
131 * local fabric modules when the following is called:
132 *
133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134 *
135 * Note that this does not limit which TCM fabric module can be
136 * registered, but simply provids auto loading logic for modules with
137 * mkdir(2) system calls with known TCM fabric modules.
138 */
6708bb27 139 if (!strncmp(name, "iscsi", 5)) {
c66ac9db
NB		 140 /*
141 * Automatically load the LIO Target fabric module when the
142 * following is called:
143 *
144 * mkdir -p $CONFIGFS/target/iscsi
145 */
146 ret = request_module("iscsi_target_mod");
147 if (ret < 0) {
6708bb27 148 pr_err("request_module() failed for"
c66ac9db
NB		 149 " iscsi_target_mod.ko: %d\n", ret);
150 return ERR_PTR(-EINVAL);
151 }
6708bb27 152 } else if (!strncmp(name, "loopback", 8)) {
c66ac9db
NB		 153 /*
154 * Automatically load the tcm_loop fabric module when the
155 * following is called:
156 *
157 * mkdir -p $CONFIGFS/target/loopback
158 */
159 ret = request_module("tcm_loop");
160 if (ret < 0) {
6708bb27 161 pr_err("request_module() failed for"
c66ac9db
NB		 162 " tcm_loop.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 }
166
167 tf = target_core_get_fabric(name);
6708bb27
AG		 168 if (!tf) {
169 pr_err("target_core_get_fabric() failed for %s\n",
c66ac9db
NB		 170 name);
171 return ERR_PTR(-EINVAL);
172 }
6708bb27 173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
c66ac9db
NB		 174 " %s\n", tf->tf_name);
175 /*
176 * On a successful target_core_get_fabric() look, the returned
177 * struct target_fabric_configfs *tf will contain a usage reference.
178 */
6708bb27 179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
d80e224d 180 &tf->tf_cit_tmpl.tfc_wwn_cit);
c66ac9db
NB		 181
182 tf->tf_group.default_groups = tf->tf_default_groups;
183 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
184 tf->tf_group.default_groups[1] = NULL;
185
186 config_group_init_type_name(&tf->tf_group, name,
d80e224d 187 &tf->tf_cit_tmpl.tfc_wwn_cit);
c66ac9db 188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
d80e224d 189 &tf->tf_cit_tmpl.tfc_discovery_cit);
c66ac9db 190
6708bb27 191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
c66ac9db
NB		 192 " %s\n", tf->tf_group.cg_item.ci_name);
193 /*
194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
195 */
196 tf->tf_ops.tf_subsys = tf->tf_subsys;
197 tf->tf_fabric = &tf->tf_group.cg_item;
6708bb27 198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
c66ac9db
NB		 199 " for %s\n", name);
200
201 return &tf->tf_group;
202}
203
204/*
205 * Called from struct target_core_group_ops->drop_item()
206 */
207static void target_core_deregister_fabric(
208 struct config_group *group,
209 struct config_item *item)
210{
211 struct target_fabric_configfs *tf = container_of(
212 to_config_group(item), struct target_fabric_configfs, tf_group);
213 struct config_group *tf_group;
214 struct config_item *df_item;
215 int i;
216
6708bb27 217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
c66ac9db
NB		 218 " tf list\n", config_item_name(item));
219
6708bb27 220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
c66ac9db
NB		 221 " %s\n", tf->tf_name);
222 atomic_dec(&tf->tf_access_cnt);
223
6708bb27 224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
c66ac9db
NB		 225 " tf->tf_fabric for %s\n", tf->tf_name);
226 tf->tf_fabric = NULL;
227
6708bb27 228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
c66ac9db
NB		 229 " %s\n", config_item_name(item));
230
231 tf_group = &tf->tf_group;
232 for (i = 0; tf_group->default_groups[i]; i++) {
233 df_item = &tf_group->default_groups[i]->cg_item;
234 tf_group->default_groups[i] = NULL;
235 config_item_put(df_item);
236 }
237 config_item_put(item);
238}
239
240static struct configfs_group_operations target_core_fabric_group_ops = {
241 .make_group = &target_core_register_fabric,
242 .drop_item = &target_core_deregister_fabric,
243};
244
245/*
246 * All item attributes appearing in /sys/kernel/target/ appear here.
247 */
248static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249 &target_core_item_attr_version,
250 NULL,
251};
252
253/*
254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255 */
256static struct config_item_type target_core_fabrics_item = {
257 .ct_item_ops = &target_core_fabric_item_ops,
258 .ct_group_ops = &target_core_fabric_group_ops,
259 .ct_attrs = target_core_fabric_item_attrs,
260 .ct_owner = THIS_MODULE,
261};
262
263static struct configfs_subsystem target_core_fabrics = {
264 .su_group = {
265 .cg_item = {
266 .ci_namebuf = "target",
267 .ci_type = &target_core_fabrics_item,
268 },
269 },
270};
271
56d128fa 272struct configfs_subsystem *target_core_subsystem[] = {
c66ac9db
NB		 273 &target_core_fabrics,
274 NULL,
275};
276
277/*##############################################################################
278// Start functions called by external Target Fabrics Modules
279//############################################################################*/
280
281/*
282 * First function called by fabric modules to:
283 *
284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285 * 2) Add struct target_fabric_configfs to g_tf_list
286 * 3) Return struct target_fabric_configfs to fabric module to be passed
287 * into target_fabric_configfs_register().
288 */
289struct target_fabric_configfs *target_fabric_configfs_init(
290 struct module *fabric_mod,
291 const char *name)
292{
293 struct target_fabric_configfs *tf;
294
c66ac9db 295 if (!(name)) {
6708bb27 296 pr_err("Unable to locate passed fabric name\n");
e3d6f909 297 return ERR_PTR(-EINVAL);
c66ac9db 298 }
60d645a4 299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
6708bb27 300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
c66ac9db 301 "_NAME_SIZE\n", name);
e3d6f909 302 return ERR_PTR(-EINVAL);
c66ac9db
NB		 303 }
304
305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
6708bb27 306 if (!tf)
e3d6f909 307 return ERR_PTR(-ENOMEM);
c66ac9db
NB		 308
309 INIT_LIST_HEAD(&tf->tf_list);
310 atomic_set(&tf->tf_access_cnt, 0);
311 /*
312 * Setup the default generic struct config_item_type's (cits) in
313 * struct target_fabric_configfs->tf_cit_tmpl
314 */
315 tf->tf_module = fabric_mod;
316 target_fabric_setup_cits(tf);
317
318 tf->tf_subsys = target_core_subsystem[0];
319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
320
321 mutex_lock(&g_tf_lock);
322 list_add_tail(&tf->tf_list, &g_tf_list);
323 mutex_unlock(&g_tf_lock);
324
6708bb27 325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
c66ac9db 326 ">>>>>>>>>>>>>>\n");
6708bb27 327 pr_debug("Initialized struct target_fabric_configfs: %p for"
c66ac9db
NB		 328 " %s\n", tf, tf->tf_name);
329 return tf;
330}
331EXPORT_SYMBOL(target_fabric_configfs_init);
332
333/*
334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335 */
336void target_fabric_configfs_free(
337 struct target_fabric_configfs *tf)
338{
339 mutex_lock(&g_tf_lock);
340 list_del(&tf->tf_list);
341 mutex_unlock(&g_tf_lock);
342
343 kfree(tf);
344}
345EXPORT_SYMBOL(target_fabric_configfs_free);
346
347/*
348 * Perform a sanity check of the passed tf->tf_ops before completing
349 * TCM fabric module registration.
350 */
351static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs *tf)
353{
354 struct target_core_fabric_ops *tfo = &tf->tf_ops;
355
6708bb27
AG		 356 if (!tfo->get_fabric_name) {
357 pr_err("Missing tfo->get_fabric_name()\n");
c66ac9db
NB		 358 return -EINVAL;
359 }
6708bb27
AG		 360 if (!tfo->get_fabric_proto_ident) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
c66ac9db
NB		 362 return -EINVAL;
363 }
6708bb27
AG		 364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
c66ac9db
NB		 366 return -EINVAL;
367 }
6708bb27
AG		 368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
c66ac9db
NB		 370 return -EINVAL;
371 }
6708bb27
AG		 372 if (!tfo->tpg_get_default_depth) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
c66ac9db
NB		 374 return -EINVAL;
375 }
6708bb27
AG		 376 if (!tfo->tpg_get_pr_transport_id) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
c66ac9db
NB		 378 return -EINVAL;
379 }
6708bb27
AG		 380 if (!tfo->tpg_get_pr_transport_id_len) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
c66ac9db
NB		 382 return -EINVAL;
383 }
6708bb27
AG		 384 if (!tfo->tpg_check_demo_mode) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
c66ac9db
NB		 386 return -EINVAL;
387 }
6708bb27
AG		 388 if (!tfo->tpg_check_demo_mode_cache) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
c66ac9db
NB		 390 return -EINVAL;
391 }
6708bb27
AG		 392 if (!tfo->tpg_check_demo_mode_write_protect) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
c66ac9db
NB		 394 return -EINVAL;
395 }
6708bb27
AG		 396 if (!tfo->tpg_check_prod_mode_write_protect) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
c66ac9db
NB		 398 return -EINVAL;
399 }
6708bb27
AG		 400 if (!tfo->tpg_alloc_fabric_acl) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
c66ac9db
NB		 402 return -EINVAL;
403 }
6708bb27
AG		 404 if (!tfo->tpg_release_fabric_acl) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
c66ac9db
NB		 406 return -EINVAL;
407 }
6708bb27
AG		 408 if (!tfo->tpg_get_inst_index) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
c66ac9db
NB		 410 return -EINVAL;
411 }
35462975 412 if (!tfo->release_cmd) {
6708bb27 413 pr_err("Missing tfo->release_cmd()\n");
c66ac9db
NB		 414 return -EINVAL;
415 }
6708bb27
AG		 416 if (!tfo->shutdown_session) {
417 pr_err("Missing tfo->shutdown_session()\n");
c66ac9db
NB		 418 return -EINVAL;
419 }
6708bb27
AG		 420 if (!tfo->close_session) {
421 pr_err("Missing tfo->close_session()\n");
c66ac9db
NB		 422 return -EINVAL;
423 }
6708bb27
AG		 424 if (!tfo->sess_get_index) {
425 pr_err("Missing tfo->sess_get_index()\n");
c66ac9db
NB		 426 return -EINVAL;
427 }
6708bb27
AG		 428 if (!tfo->write_pending) {
429 pr_err("Missing tfo->write_pending()\n");
c66ac9db
NB		 430 return -EINVAL;
431 }
6708bb27
AG		 432 if (!tfo->write_pending_status) {
433 pr_err("Missing tfo->write_pending_status()\n");
c66ac9db
NB		 434 return -EINVAL;
435 }
6708bb27
AG		 436 if (!tfo->set_default_node_attributes) {
437 pr_err("Missing tfo->set_default_node_attributes()\n");
c66ac9db
NB		 438 return -EINVAL;
439 }
6708bb27
AG		 440 if (!tfo->get_task_tag) {
441 pr_err("Missing tfo->get_task_tag()\n");
c66ac9db
NB		 442 return -EINVAL;
443 }
6708bb27
AG		 444 if (!tfo->get_cmd_state) {
445 pr_err("Missing tfo->get_cmd_state()\n");
c66ac9db
NB		 446 return -EINVAL;
447 }
6708bb27
AG		 448 if (!tfo->queue_data_in) {
449 pr_err("Missing tfo->queue_data_in()\n");
c66ac9db
NB		 450 return -EINVAL;
451 }
6708bb27
AG		 452 if (!tfo->queue_status) {
453 pr_err("Missing tfo->queue_status()\n");
c66ac9db
NB		 454 return -EINVAL;
455 }
6708bb27
AG		 456 if (!tfo->queue_tm_rsp) {
457 pr_err("Missing tfo->queue_tm_rsp()\n");
c66ac9db
NB		 458 return -EINVAL;
459 }
c66ac9db
NB		 460 /*
461 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
462 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
463 * target_core_fabric_configfs.c WWN+TPG group context code.
464 */
6708bb27
AG		 465 if (!tfo->fabric_make_wwn) {
466 pr_err("Missing tfo->fabric_make_wwn()\n");
c66ac9db
NB		 467 return -EINVAL;
468 }
6708bb27
AG		 469 if (!tfo->fabric_drop_wwn) {
470 pr_err("Missing tfo->fabric_drop_wwn()\n");
c66ac9db
NB		 471 return -EINVAL;
472 }
6708bb27
AG		 473 if (!tfo->fabric_make_tpg) {
474 pr_err("Missing tfo->fabric_make_tpg()\n");
c66ac9db
NB		 475 return -EINVAL;
476 }
6708bb27
AG		 477 if (!tfo->fabric_drop_tpg) {
478 pr_err("Missing tfo->fabric_drop_tpg()\n");
c66ac9db
NB		 479 return -EINVAL;
480 }
481
482 return 0;
483}
484
485/*
486 * Called 2nd from fabric module with returned parameter of
487 * struct target_fabric_configfs * from target_fabric_configfs_init().
488 *
489 * Upon a successful registration, the new fabric's struct config_item is
490 * return. Also, a pointer to this struct is set in the passed
491 * struct target_fabric_configfs.
492 */
493int target_fabric_configfs_register(
494 struct target_fabric_configfs *tf)
495{
c66ac9db
NB		 496 int ret;
497
6708bb27
AG		 498 if (!tf) {
499 pr_err("Unable to locate target_fabric_configfs"
c66ac9db
NB		 500 " pointer\n");
501 return -EINVAL;
502 }
6708bb27
AG		 503 if (!tf->tf_subsys) {
504 pr_err("Unable to target struct config_subsystem"
c66ac9db
NB		 505 " pointer\n");
506 return -EINVAL;
507 }
c66ac9db
NB		 508 ret = target_fabric_tf_ops_check(tf);
509 if (ret < 0)
510 return ret;
511
6708bb27 512 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
c66ac9db
NB		 513 ">>>>>>>>>>\n");
514 return 0;
515}
516EXPORT_SYMBOL(target_fabric_configfs_register);
517
518void target_fabric_configfs_deregister(
519 struct target_fabric_configfs *tf)
520{
c66ac9db
NB		 521 struct configfs_subsystem *su;
522
6708bb27
AG		 523 if (!tf) {
524 pr_err("Unable to locate passed target_fabric_"
c66ac9db
NB		 525 "configfs\n");
526 return;
527 }
528 su = tf->tf_subsys;
6708bb27
AG		 529 if (!su) {
530 pr_err("Unable to locate passed tf->tf_subsys"
c66ac9db
NB		 531 " pointer\n");
532 return;
533 }
6708bb27 534 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
c66ac9db
NB		 535 ">>>>>>>>>>>>\n");
536 mutex_lock(&g_tf_lock);
537 if (atomic_read(&tf->tf_access_cnt)) {
538 mutex_unlock(&g_tf_lock);
6708bb27 539 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
c66ac9db
NB		 540 tf->tf_name);
541 BUG();
542 }
543 list_del(&tf->tf_list);
544 mutex_unlock(&g_tf_lock);
545
6708bb27 546 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
c66ac9db
NB		 547 " %s\n", tf->tf_name);
548 tf->tf_module = NULL;
549 tf->tf_subsys = NULL;
550 kfree(tf);
551
6708bb27 552 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
c66ac9db 553 ">>>>>\n");
c66ac9db
NB		 554}
555EXPORT_SYMBOL(target_fabric_configfs_deregister);
556
557/*##############################################################################
558// Stop functions called by external Target Fabrics Modules
559//############################################################################*/
560
561/* Start functions for struct config_item_type target_core_dev_attrib_cit */
562
563#define DEF_DEV_ATTRIB_SHOW(_name) \
564static ssize_t target_core_dev_show_attr_##_name( \
565 struct se_dev_attrib *da, \
566 char *page) \
567{ \
0fd97ccf
CH		 568 return snprintf(page, PAGE_SIZE, "%u\n", \
569 (u32)da->da_dev->dev_attrib._name); \
c66ac9db
NB		 570}
571
572#define DEF_DEV_ATTRIB_STORE(_name) \
573static ssize_t target_core_dev_store_attr_##_name( \
574 struct se_dev_attrib *da, \
575 const char *page, \
576 size_t count) \
577{ \
c66ac9db
NB		 578 unsigned long val; \
579 int ret; \
580 \
57103d7f 581 ret = kstrtoul(page, 0, &val); \
c66ac9db 582 if (ret < 0) { \
57103d7f 583 pr_err("kstrtoul() failed with" \
c66ac9db
NB		 584 " ret: %d\n", ret); \
585 return -EINVAL; \
586 } \
0fd97ccf 587 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
c66ac9db
NB		 588 \
589 return (!ret) ? count : -EINVAL; \
590}
591
592#define DEF_DEV_ATTRIB(_name) \
593DEF_DEV_ATTRIB_SHOW(_name); \
594DEF_DEV_ATTRIB_STORE(_name);
595
596#define DEF_DEV_ATTRIB_RO(_name) \
597DEF_DEV_ATTRIB_SHOW(_name);
598
599CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
600#define SE_DEV_ATTR(_name, _mode) \
601static struct target_core_dev_attrib_attribute \
602 target_core_dev_attrib_##_name = \
603 __CONFIGFS_EATTR(_name, _mode, \
604 target_core_dev_show_attr_##_name, \
605 target_core_dev_store_attr_##_name);
606
607#define SE_DEV_ATTR_RO(_name); \
608static struct target_core_dev_attrib_attribute \
609 target_core_dev_attrib_##_name = \
610 __CONFIGFS_EATTR_RO(_name, \
611 target_core_dev_show_attr_##_name);
612
adfa9570
TB		 613DEF_DEV_ATTRIB(emulate_model_alias);
614SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
615
c66ac9db
NB		 616DEF_DEV_ATTRIB(emulate_dpo);
617SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
618
619DEF_DEV_ATTRIB(emulate_fua_write);
620SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
621
622DEF_DEV_ATTRIB(emulate_fua_read);
623SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
624
625DEF_DEV_ATTRIB(emulate_write_cache);
626SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
627
628DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
629SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
630
631DEF_DEV_ATTRIB(emulate_tas);
632SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
633
634DEF_DEV_ATTRIB(emulate_tpu);
635SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
636
637DEF_DEV_ATTRIB(emulate_tpws);
638SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
639
0123a9ec
NB		 640DEF_DEV_ATTRIB(emulate_caw);
641SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
642
d397a445
NB		 643DEF_DEV_ATTRIB(emulate_3pc);
644SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
645
c66ac9db
NB		 646DEF_DEV_ATTRIB(enforce_pr_isids);
647SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
648
e22a7f07
RD		 649DEF_DEV_ATTRIB(is_nonrot);
650SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
651
5de619a3
NB		 652DEF_DEV_ATTRIB(emulate_rest_reord);
653SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
654
c66ac9db
NB		 655DEF_DEV_ATTRIB_RO(hw_block_size);
656SE_DEV_ATTR_RO(hw_block_size);
657
658DEF_DEV_ATTRIB(block_size);
659SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
660
661DEF_DEV_ATTRIB_RO(hw_max_sectors);
662SE_DEV_ATTR_RO(hw_max_sectors);
663
015487b8
RD		 664DEF_DEV_ATTRIB(fabric_max_sectors);
665SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
666
c66ac9db
NB		 667DEF_DEV_ATTRIB(optimal_sectors);
668SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
669
670DEF_DEV_ATTRIB_RO(hw_queue_depth);
671SE_DEV_ATTR_RO(hw_queue_depth);
672
673DEF_DEV_ATTRIB(queue_depth);
674SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
675
c66ac9db
NB		 676DEF_DEV_ATTRIB(max_unmap_lba_count);
677SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
678
679DEF_DEV_ATTRIB(max_unmap_block_desc_count);
680SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
681
682DEF_DEV_ATTRIB(unmap_granularity);
683SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
684
685DEF_DEV_ATTRIB(unmap_granularity_alignment);
686SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
687
773cbaf7
NB		 688DEF_DEV_ATTRIB(max_write_same_len);
689SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
690
c66ac9db
NB		 691CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
692
693static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
adfa9570 694 &target_core_dev_attrib_emulate_model_alias.attr,
c66ac9db
NB		 695 &target_core_dev_attrib_emulate_dpo.attr,
696 &target_core_dev_attrib_emulate_fua_write.attr,
697 &target_core_dev_attrib_emulate_fua_read.attr,
698 &target_core_dev_attrib_emulate_write_cache.attr,
699 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
700 &target_core_dev_attrib_emulate_tas.attr,
701 &target_core_dev_attrib_emulate_tpu.attr,
702 &target_core_dev_attrib_emulate_tpws.attr,
0123a9ec 703 &target_core_dev_attrib_emulate_caw.attr,
d397a445 704 &target_core_dev_attrib_emulate_3pc.attr,
c66ac9db 705 &target_core_dev_attrib_enforce_pr_isids.attr,
e22a7f07 706 &target_core_dev_attrib_is_nonrot.attr,
5de619a3 707 &target_core_dev_attrib_emulate_rest_reord.attr,
c66ac9db
NB		 708 &target_core_dev_attrib_hw_block_size.attr,
709 &target_core_dev_attrib_block_size.attr,
710 &target_core_dev_attrib_hw_max_sectors.attr,
015487b8 711 &target_core_dev_attrib_fabric_max_sectors.attr,
c66ac9db
NB		 712 &target_core_dev_attrib_optimal_sectors.attr,
713 &target_core_dev_attrib_hw_queue_depth.attr,
714 &target_core_dev_attrib_queue_depth.attr,
c66ac9db
NB		 715 &target_core_dev_attrib_max_unmap_lba_count.attr,
716 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
717 &target_core_dev_attrib_unmap_granularity.attr,
718 &target_core_dev_attrib_unmap_granularity_alignment.attr,
773cbaf7 719 &target_core_dev_attrib_max_write_same_len.attr,
c66ac9db
NB		 720 NULL,
721};
722
723static struct configfs_item_operations target_core_dev_attrib_ops = {
724 .show_attribute = target_core_dev_attrib_attr_show,
725 .store_attribute = target_core_dev_attrib_attr_store,
726};
727
728static struct config_item_type target_core_dev_attrib_cit = {
729 .ct_item_ops = &target_core_dev_attrib_ops,
730 .ct_attrs = target_core_dev_attrib_attrs,
731 .ct_owner = THIS_MODULE,
732};
733
734/* End functions for struct config_item_type target_core_dev_attrib_cit */
735
736/* Start functions for struct config_item_type target_core_dev_wwn_cit */
737
738CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
739#define SE_DEV_WWN_ATTR(_name, _mode) \
740static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
741 __CONFIGFS_EATTR(_name, _mode, \
742 target_core_dev_wwn_show_attr_##_name, \
743 target_core_dev_wwn_store_attr_##_name);
744
745#define SE_DEV_WWN_ATTR_RO(_name); \
746do { \
747 static struct target_core_dev_wwn_attribute \
748 target_core_dev_wwn_##_name = \
749 __CONFIGFS_EATTR_RO(_name, \
750 target_core_dev_wwn_show_attr_##_name); \
751} while (0);
752
753/*
754 * VPD page 0x80 Unit serial
755 */
756static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
757 struct t10_wwn *t10_wwn,
758 char *page)
759{
c66ac9db
NB		 760 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
761 &t10_wwn->unit_serial[0]);
762}
763
764static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
765 struct t10_wwn *t10_wwn,
766 const char *page,
767 size_t count)
768{
0fd97ccf 769 struct se_device *dev = t10_wwn->t10_dev;
c66ac9db
NB		 770 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
771
772 /*
773 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
774 * from the struct scsi_device level firmware, do not allow
775 * VPD Unit Serial to be emulated.
776 *
777 * Note this struct scsi_device could also be emulating VPD
778 * information from its drivers/scsi LLD. But for now we assume
779 * it is doing 'the right thing' wrt a world wide unique
780 * VPD Unit Serial Number that OS dependent multipath can depend on.
781 */
0fd97ccf 782 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
6708bb27 783 pr_err("Underlying SCSI device firmware provided VPD"
c66ac9db
NB		 784 " Unit Serial, ignoring request\n");
785 return -EOPNOTSUPP;
786 }
787
60d645a4 788 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
6708bb27 789 pr_err("Emulated VPD Unit Serial exceeds"
c66ac9db
NB		 790 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
791 return -EOVERFLOW;
792 }
793 /*
794 * Check to see if any active $FABRIC_MOD exports exist. If they
795 * do exist, fail here as changing this information on the fly
796 * (underneath the initiator side OS dependent multipath code)
797 * could cause negative effects.
798 */
0fd97ccf
CH		 799 if (dev->export_count) {
800 pr_err("Unable to set VPD Unit Serial while"
801 " active %d $FABRIC_MOD exports exist\n",
802 dev->export_count);
803 return -EINVAL;
c66ac9db 804 }
0fd97ccf 805
c66ac9db
NB		 806 /*
807 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
808 *
809 * Also, strip any newline added from the userspace
810 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
811 */
812 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
813 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
0fd97ccf 814 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
c66ac9db 815 "%s", strstrip(buf));
0fd97ccf 816 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
c66ac9db 817
6708bb27 818 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
0fd97ccf 819 " %s\n", dev->t10_wwn.unit_serial);
c66ac9db
NB		 820
821 return count;
822}
823
824SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
825
826/*
827 * VPD page 0x83 Protocol Identifier
828 */
829static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
830 struct t10_wwn *t10_wwn,
831 char *page)
832{
c66ac9db
NB		 833 struct t10_vpd *vpd;
834 unsigned char buf[VPD_TMP_BUF_SIZE];
835 ssize_t len = 0;
836
c66ac9db
NB		 837 memset(buf, 0, VPD_TMP_BUF_SIZE);
838
839 spin_lock(&t10_wwn->t10_vpd_lock);
840 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
6708bb27 841 if (!vpd->protocol_identifier_set)
c66ac9db
NB		 842 continue;
843
844 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
845
6708bb27 846 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 847 break;
848
849 len += sprintf(page+len, "%s", buf);
850 }
851 spin_unlock(&t10_wwn->t10_vpd_lock);
852
853 return len;
854}
855
856static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
857 struct t10_wwn *t10_wwn,
858 const char *page,
859 size_t count)
860{
861 return -ENOSYS;
862}
863
864SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
865
866/*
867 * Generic wrapper for dumping VPD identifiers by association.
868 */
869#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
870static ssize_t target_core_dev_wwn_show_attr_##_name( \
871 struct t10_wwn *t10_wwn, \
872 char *page) \
873{ \
c66ac9db
NB		 874 struct t10_vpd *vpd; \
875 unsigned char buf[VPD_TMP_BUF_SIZE]; \
876 ssize_t len = 0; \
877 \
c66ac9db
NB		 878 spin_lock(&t10_wwn->t10_vpd_lock); \
879 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
880 if (vpd->association != _assoc) \
881 continue; \
882 \
883 memset(buf, 0, VPD_TMP_BUF_SIZE); \
884 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 885 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 886 break; \
887 len += sprintf(page+len, "%s", buf); \
888 \
889 memset(buf, 0, VPD_TMP_BUF_SIZE); \
890 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 891 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 892 break; \
893 len += sprintf(page+len, "%s", buf); \
894 \
895 memset(buf, 0, VPD_TMP_BUF_SIZE); \
896 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 897 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 898 break; \
899 len += sprintf(page+len, "%s", buf); \
900 } \
901 spin_unlock(&t10_wwn->t10_vpd_lock); \
902 \
903 return len; \
904}
905
906/*
163cd5fa 907 * VPD page 0x83 Association: Logical Unit
c66ac9db
NB		 908 */
909DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
910
911static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
912 struct t10_wwn *t10_wwn,
913 const char *page,
914 size_t count)
915{
916 return -ENOSYS;
917}
918
919SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
920
921/*
922 * VPD page 0x83 Association: Target Port
923 */
924DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
925
926static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
927 struct t10_wwn *t10_wwn,
928 const char *page,
929 size_t count)
930{
931 return -ENOSYS;
932}
933
934SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
935
936/*
937 * VPD page 0x83 Association: SCSI Target Device
938 */
939DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
940
941static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
942 struct t10_wwn *t10_wwn,
943 const char *page,
944 size_t count)
945{
946 return -ENOSYS;
947}
948
949SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
950
951CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
952
953static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
954 &target_core_dev_wwn_vpd_unit_serial.attr,
955 &target_core_dev_wwn_vpd_protocol_identifier.attr,
956 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
957 &target_core_dev_wwn_vpd_assoc_target_port.attr,
958 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
959 NULL,
960};
961
962static struct configfs_item_operations target_core_dev_wwn_ops = {
963 .show_attribute = target_core_dev_wwn_attr_show,
964 .store_attribute = target_core_dev_wwn_attr_store,
965};
966
967static struct config_item_type target_core_dev_wwn_cit = {
968 .ct_item_ops = &target_core_dev_wwn_ops,
969 .ct_attrs = target_core_dev_wwn_attrs,
970 .ct_owner = THIS_MODULE,
971};
972
973/* End functions for struct config_item_type target_core_dev_wwn_cit */
974
975/* Start functions for struct config_item_type target_core_dev_pr_cit */
976
0fd97ccf 977CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
c66ac9db
NB		 978#define SE_DEV_PR_ATTR(_name, _mode) \
979static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
980 __CONFIGFS_EATTR(_name, _mode, \
981 target_core_dev_pr_show_attr_##_name, \
982 target_core_dev_pr_store_attr_##_name);
983
984#define SE_DEV_PR_ATTR_RO(_name); \
985static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
986 __CONFIGFS_EATTR_RO(_name, \
987 target_core_dev_pr_show_attr_##_name);
988
d977f437
CH		 989static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
990 char *page)
c66ac9db
NB		 991{
992 struct se_node_acl *se_nacl;
993 struct t10_pr_registration *pr_reg;
994 char i_buf[PR_REG_ISID_ID_LEN];
c66ac9db
NB		 995
996 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
997
c66ac9db 998 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 999 if (!pr_reg)
1000 return sprintf(page, "No SPC-3 Reservation holder\n");
1001
c66ac9db 1002 se_nacl = pr_reg->pr_reg_nacl;
d2843c17 1003 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
c66ac9db 1004
d977f437 1005 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
e3d6f909 1006 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
d2843c17 1007 se_nacl->initiatorname, i_buf);
c66ac9db
NB		 1008}
1009
d977f437
CH		 1010static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1011 char *page)
c66ac9db
NB		 1012{
1013 struct se_node_acl *se_nacl;
d977f437 1014 ssize_t len;
c66ac9db 1015
c66ac9db 1016 se_nacl = dev->dev_reserved_node_acl;
d977f437
CH		 1017 if (se_nacl) {
1018 len = sprintf(page,
1019 "SPC-2 Reservation: %s Initiator: %s\n",
1020 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1021 se_nacl->initiatorname);
1022 } else {
1023 len = sprintf(page, "No SPC-2 Reservation holder\n");
c66ac9db 1024 }
d977f437 1025 return len;
c66ac9db
NB		 1026}
1027
0fd97ccf
CH		 1028static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1029 char *page)
c66ac9db 1030{
d977f437 1031 int ret;
c66ac9db 1032
d977f437
CH		 1033 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1034 return sprintf(page, "Passthrough\n");
c66ac9db 1035
d977f437
CH		 1036 spin_lock(&dev->dev_reservation_lock);
1037 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1038 ret = target_core_dev_pr_show_spc2_res(dev, page);
1039 else
1040 ret = target_core_dev_pr_show_spc3_res(dev, page);
1041 spin_unlock(&dev->dev_reservation_lock);
1042 return ret;
c66ac9db
NB		 1043}
1044
1045SE_DEV_PR_ATTR_RO(res_holder);
1046
c66ac9db 1047static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
0fd97ccf 1048 struct se_device *dev, char *page)
c66ac9db 1049{
c66ac9db
NB		 1050 ssize_t len = 0;
1051
c66ac9db 1052 spin_lock(&dev->dev_reservation_lock);
d977f437 1053 if (!dev->dev_pr_res_holder) {
c66ac9db 1054 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 1055 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
c66ac9db
NB		 1056 len = sprintf(page, "SPC-3 Reservation: All Target"
1057 " Ports registration\n");
d977f437 1058 } else {
c66ac9db
NB		 1059 len = sprintf(page, "SPC-3 Reservation: Single"
1060 " Target Port registration\n");
d977f437 1061 }
c66ac9db 1062
d977f437 1063 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 1064 return len;
1065}
1066
1067SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1068
c66ac9db 1069static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
0fd97ccf 1070 struct se_device *dev, char *page)
c66ac9db 1071{
0fd97ccf 1072 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
c66ac9db
NB		 1073}
1074
1075SE_DEV_PR_ATTR_RO(res_pr_generation);
1076
1077/*
1078 * res_pr_holder_tg_port
1079 */
1080static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
0fd97ccf 1081 struct se_device *dev, char *page)
c66ac9db 1082{
c66ac9db
NB		 1083 struct se_node_acl *se_nacl;
1084 struct se_lun *lun;
1085 struct se_portal_group *se_tpg;
1086 struct t10_pr_registration *pr_reg;
1087 struct target_core_fabric_ops *tfo;
1088 ssize_t len = 0;
1089
c66ac9db
NB		 1090 spin_lock(&dev->dev_reservation_lock);
1091 pr_reg = dev->dev_pr_res_holder;
6708bb27 1092 if (!pr_reg) {
c66ac9db 1093 len = sprintf(page, "No SPC-3 Reservation holder\n");
d977f437 1094 goto out_unlock;
c66ac9db 1095 }
d977f437 1096
c66ac9db
NB		 1097 se_nacl = pr_reg->pr_reg_nacl;
1098 se_tpg = se_nacl->se_tpg;
1099 lun = pr_reg->pr_reg_tg_pt_lun;
e3d6f909 1100 tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 1101
1102 len += sprintf(page+len, "SPC-3 Reservation: %s"
1103 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1104 tfo->tpg_get_wwn(se_tpg));
1105 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
35d1efe8 1106 " Identifier Tag: %hu %s Portal Group Tag: %hu"
c66ac9db
NB		 1107 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1108 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1109 tfo->get_fabric_name(), lun->unpacked_lun);
c66ac9db 1110
d977f437
CH		 1111out_unlock:
1112 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 1113 return len;
1114}
1115
1116SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1117
c66ac9db 1118static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
0fd97ccf 1119 struct se_device *dev, char *page)
c66ac9db
NB		 1120{
1121 struct target_core_fabric_ops *tfo;
1122 struct t10_pr_registration *pr_reg;
1123 unsigned char buf[384];
1124 char i_buf[PR_REG_ISID_ID_LEN];
1125 ssize_t len = 0;
d2843c17 1126 int reg_count = 0;
c66ac9db 1127
c66ac9db
NB		 1128 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1129
0fd97ccf
CH		 1130 spin_lock(&dev->t10_pr.registration_lock);
1131 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
c66ac9db
NB		 1132 pr_reg_list) {
1133
1134 memset(buf, 0, 384);
1135 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1136 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
d2843c17 1137 core_pr_dump_initiator_port(pr_reg, i_buf,
c66ac9db
NB		 1138 PR_REG_ISID_ID_LEN);
1139 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1140 tfo->get_fabric_name(),
d2843c17 1141 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
c66ac9db
NB		 1142 pr_reg->pr_res_generation);
1143
6708bb27 1144 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 1145 break;
1146
1147 len += sprintf(page+len, "%s", buf);
1148 reg_count++;
1149 }
0fd97ccf 1150 spin_unlock(&dev->t10_pr.registration_lock);
c66ac9db 1151
6708bb27 1152 if (!reg_count)
c66ac9db
NB		 1153 len += sprintf(page+len, "None\n");
1154
1155 return len;
1156}
1157
1158SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1159
c66ac9db 1160static ssize_t target_core_dev_pr_show_attr_res_pr_type(
0fd97ccf 1161 struct se_device *dev, char *page)
c66ac9db 1162{
c66ac9db
NB		 1163 struct t10_pr_registration *pr_reg;
1164 ssize_t len = 0;
1165
c66ac9db
NB		 1166 spin_lock(&dev->dev_reservation_lock);
1167 pr_reg = dev->dev_pr_res_holder;
d977f437
CH		 1168 if (pr_reg) {
1169 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1170 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1171 } else {
c66ac9db 1172 len = sprintf(page, "No SPC-3 Reservation holder\n");
c66ac9db 1173 }
c66ac9db 1174
d977f437 1175 spin_unlock(&dev->dev_reservation_lock);
c66ac9db
NB		 1176 return len;
1177}
1178
1179SE_DEV_PR_ATTR_RO(res_pr_type);
1180
c66ac9db 1181static ssize_t target_core_dev_pr_show_attr_res_type(
0fd97ccf 1182 struct se_device *dev, char *page)
c66ac9db 1183{
d977f437
CH		 1184 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1185 return sprintf(page, "SPC_PASSTHROUGH\n");
1186 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1187 return sprintf(page, "SPC2_RESERVATIONS\n");
1188 else
1189 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
c66ac9db
NB		 1190}
1191
1192SE_DEV_PR_ATTR_RO(res_type);
1193
c66ac9db 1194static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
0fd97ccf 1195 struct se_device *dev, char *page)
c66ac9db 1196{
d977f437 1197 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
c66ac9db
NB		 1198 return 0;
1199
1200 return sprintf(page, "APTPL Bit Status: %s\n",
0fd97ccf 1201 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
c66ac9db
NB		 1202}
1203
1204SE_DEV_PR_ATTR_RO(res_aptpl_active);
1205
1206/*
1207 * res_aptpl_metadata
1208 */
1209static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
0fd97ccf 1210 struct se_device *dev, char *page)
c66ac9db 1211{
d977f437 1212 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
c66ac9db
NB		 1213 return 0;
1214
1215 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1216}
1217
1218enum {
1219 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1220 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1221 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1222 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1223};
1224
1225static match_table_t tokens = {
1226 {Opt_initiator_fabric, "initiator_fabric=%s"},
1227 {Opt_initiator_node, "initiator_node=%s"},
1228 {Opt_initiator_sid, "initiator_sid=%s"},
1229 {Opt_sa_res_key, "sa_res_key=%s"},
1230 {Opt_res_holder, "res_holder=%d"},
1231 {Opt_res_type, "res_type=%d"},
1232 {Opt_res_scope, "res_scope=%d"},
1233 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1234 {Opt_mapped_lun, "mapped_lun=%d"},
1235 {Opt_target_fabric, "target_fabric=%s"},
1236 {Opt_target_node, "target_node=%s"},
1237 {Opt_tpgt, "tpgt=%d"},
1238 {Opt_port_rtpi, "port_rtpi=%d"},
1239 {Opt_target_lun, "target_lun=%d"},
1240 {Opt_err, NULL}
1241};
1242
1243static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
0fd97ccf 1244 struct se_device *dev,
c66ac9db
NB		 1245 const char *page,
1246 size_t count)
1247{
6d180253
JJ		 1248 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1249 unsigned char *t_fabric = NULL, *t_port = NULL;
c66ac9db
NB		 1250 char *orig, *ptr, *arg_p, *opts;
1251 substring_t args[MAX_OPT_ARGS];
1252 unsigned long long tmp_ll;
1253 u64 sa_res_key = 0;
1254 u32 mapped_lun = 0, target_lun = 0;
1255 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1256 u16 port_rpti = 0, tpgt = 0;
1257 u8 type = 0, scope;
1258
d977f437
CH		 1259 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1260 return 0;
1261 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
c66ac9db
NB		 1262 return 0;
1263
0fd97ccf 1264 if (dev->export_count) {
6708bb27 1265 pr_debug("Unable to process APTPL metadata while"
c66ac9db
NB		 1266 " active fabric exports exist\n");
1267 return -EINVAL;
1268 }
1269
1270 opts = kstrdup(page, GFP_KERNEL);
1271 if (!opts)
1272 return -ENOMEM;
1273
1274 orig = opts;
90c161b6 1275 while ((ptr = strsep(&opts, ",\n")) != NULL) {
c66ac9db
NB		 1276 if (!*ptr)
1277 continue;
1278
1279 token = match_token(ptr, tokens, args);
1280 switch (token) {
1281 case Opt_initiator_fabric:
1282 i_fabric = match_strdup(&args[0]);
6d180253
JJ		 1283 if (!i_fabric) {
1284 ret = -ENOMEM;
1285 goto out;
1286 }
c66ac9db
NB		 1287 break;
1288 case Opt_initiator_node:
1289 i_port = match_strdup(&args[0]);
6d180253
JJ		 1290 if (!i_port) {
1291 ret = -ENOMEM;
1292 goto out;
1293 }
60d645a4 1294 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
6708bb27 1295 pr_err("APTPL metadata initiator_node="
c66ac9db
NB		 1296 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1297 PR_APTPL_MAX_IPORT_LEN);
1298 ret = -EINVAL;
1299 break;
1300 }
1301 break;
1302 case Opt_initiator_sid:
1303 isid = match_strdup(&args[0]);
6d180253
JJ		 1304 if (!isid) {
1305 ret = -ENOMEM;
1306 goto out;
1307 }
60d645a4 1308 if (strlen(isid) >= PR_REG_ISID_LEN) {
6708bb27 1309 pr_err("APTPL metadata initiator_isid"
c66ac9db
NB		 1310 "= exceeds PR_REG_ISID_LEN: %d\n",
1311 PR_REG_ISID_LEN);
1312 ret = -EINVAL;
1313 break;
1314 }
1315 break;
1316 case Opt_sa_res_key:
1317 arg_p = match_strdup(&args[0]);
6d180253
JJ		 1318 if (!arg_p) {
1319 ret = -ENOMEM;
1320 goto out;
1321 }
57103d7f 1322 ret = kstrtoull(arg_p, 0, &tmp_ll);
c66ac9db 1323 if (ret < 0) {
57103d7f 1324 pr_err("kstrtoull() failed for"
c66ac9db
NB		 1325 " sa_res_key=\n");
1326 goto out;
1327 }
1328 sa_res_key = (u64)tmp_ll;
1329 break;
1330 /*
1331 * PR APTPL Metadata for Reservation
1332 */
1333 case Opt_res_holder:
1334 match_int(args, &arg);
1335 res_holder = arg;
1336 break;
1337 case Opt_res_type:
1338 match_int(args, &arg);
1339 type = (u8)arg;
1340 break;
1341 case Opt_res_scope:
1342 match_int(args, &arg);
1343 scope = (u8)arg;
1344 break;
1345 case Opt_res_all_tg_pt:
1346 match_int(args, &arg);
1347 all_tg_pt = (int)arg;
1348 break;
1349 case Opt_mapped_lun:
1350 match_int(args, &arg);
1351 mapped_lun = (u32)arg;
1352 break;
1353 /*
1354 * PR APTPL Metadata for Target Port
1355 */
1356 case Opt_target_fabric:
1357 t_fabric = match_strdup(&args[0]);
6d180253
JJ		 1358 if (!t_fabric) {
1359 ret = -ENOMEM;
1360 goto out;
1361 }
c66ac9db
NB		 1362 break;
1363 case Opt_target_node:
1364 t_port = match_strdup(&args[0]);
6d180253
JJ		 1365 if (!t_port) {
1366 ret = -ENOMEM;
1367 goto out;
1368 }
60d645a4 1369 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
6708bb27 1370 pr_err("APTPL metadata target_node="
c66ac9db
NB		 1371 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1372 PR_APTPL_MAX_TPORT_LEN);
1373 ret = -EINVAL;
1374 break;
1375 }
1376 break;
1377 case Opt_tpgt:
1378 match_int(args, &arg);
1379 tpgt = (u16)arg;
1380 break;
1381 case Opt_port_rtpi:
1382 match_int(args, &arg);
1383 port_rpti = (u16)arg;
1384 break;
1385 case Opt_target_lun:
1386 match_int(args, &arg);
1387 target_lun = (u32)arg;
1388 break;
1389 default:
1390 break;
1391 }
1392 }
1393
6708bb27
AG		 1394 if (!i_port || !t_port || !sa_res_key) {
1395 pr_err("Illegal parameters for APTPL registration\n");
c66ac9db
NB		 1396 ret = -EINVAL;
1397 goto out;
1398 }
1399
1400 if (res_holder && !(type)) {
6708bb27 1401 pr_err("Illegal PR type: 0x%02x for reservation"
c66ac9db
NB		 1402 " holder\n", type);
1403 ret = -EINVAL;
1404 goto out;
1405 }
1406
0fd97ccf 1407 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
c66ac9db
NB		 1408 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1409 res_holder, all_tg_pt, type);
1410out:
6d180253
JJ		 1411 kfree(i_fabric);
1412 kfree(i_port);
1413 kfree(isid);
1414 kfree(t_fabric);
1415 kfree(t_port);
c66ac9db
NB		 1416 kfree(orig);
1417 return (ret == 0) ? count : ret;
1418}
1419
1420SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1421
0fd97ccf 1422CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
c66ac9db
NB		 1423
1424static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1425 &target_core_dev_pr_res_holder.attr,
1426 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1427 &target_core_dev_pr_res_pr_generation.attr,
1428 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1429 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1430 &target_core_dev_pr_res_pr_type.attr,
1431 &target_core_dev_pr_res_type.attr,
1432 &target_core_dev_pr_res_aptpl_active.attr,
1433 &target_core_dev_pr_res_aptpl_metadata.attr,
1434 NULL,
1435};
1436
1437static struct configfs_item_operations target_core_dev_pr_ops = {
1438 .show_attribute = target_core_dev_pr_attr_show,
1439 .store_attribute = target_core_dev_pr_attr_store,
1440};
1441
1442static struct config_item_type target_core_dev_pr_cit = {
1443 .ct_item_ops = &target_core_dev_pr_ops,
1444 .ct_attrs = target_core_dev_pr_attrs,
1445 .ct_owner = THIS_MODULE,
1446};
1447
1448/* End functions for struct config_item_type target_core_dev_pr_cit */
1449
1450/* Start functions for struct config_item_type target_core_dev_cit */
1451
1452static ssize_t target_core_show_dev_info(void *p, char *page)
1453{
0fd97ccf
CH		 1454 struct se_device *dev = p;
1455 struct se_subsystem_api *t = dev->transport;
c66ac9db
NB		 1456 int bl = 0;
1457 ssize_t read_bytes = 0;
1458
0fd97ccf 1459 transport_dump_dev_state(dev, page, &bl);
c66ac9db 1460 read_bytes += bl;
0fd97ccf 1461 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
c66ac9db
NB		 1462 return read_bytes;
1463}
1464
1465static struct target_core_configfs_attribute target_core_attr_dev_info = {
1466 .attr = { .ca_owner = THIS_MODULE,
1467 .ca_name = "info",
1468 .ca_mode = S_IRUGO },
1469 .show = target_core_show_dev_info,
1470 .store = NULL,
1471};
1472
1473static ssize_t target_core_store_dev_control(
1474 void *p,
1475 const char *page,
1476 size_t count)
1477{
0fd97ccf
CH		 1478 struct se_device *dev = p;
1479 struct se_subsystem_api *t = dev->transport;
c66ac9db 1480
0fd97ccf 1481 return t->set_configfs_dev_params(dev, page, count);
c66ac9db
NB		 1482}
1483
1484static struct target_core_configfs_attribute target_core_attr_dev_control = {
1485 .attr = { .ca_owner = THIS_MODULE,
1486 .ca_name = "control",
1487 .ca_mode = S_IWUSR },
1488 .show = NULL,
1489 .store = target_core_store_dev_control,
1490};
1491
1492static ssize_t target_core_show_dev_alias(void *p, char *page)
1493{
0fd97ccf 1494 struct se_device *dev = p;
c66ac9db 1495
0fd97ccf 1496 if (!(dev->dev_flags & DF_USING_ALIAS))
c66ac9db
NB		 1497 return 0;
1498
0fd97ccf 1499 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
c66ac9db
NB		 1500}
1501
1502static ssize_t target_core_store_dev_alias(
1503 void *p,
1504 const char *page,
1505 size_t count)
1506{
0fd97ccf
CH		 1507 struct se_device *dev = p;
1508 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1509 ssize_t read_bytes;
1510
1511 if (count > (SE_DEV_ALIAS_LEN-1)) {
6708bb27 1512 pr_err("alias count: %d exceeds"
c66ac9db
NB		 1513 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1514 SE_DEV_ALIAS_LEN-1);
1515 return -EINVAL;
1516 }
1517
0fd97ccf 1518 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
3011684c
DC		 1519 if (!read_bytes)
1520 return -EINVAL;
0fd97ccf
CH		 1521 if (dev->dev_alias[read_bytes - 1] == '\n')
1522 dev->dev_alias[read_bytes - 1] = '\0';
0877eafd 1523
0fd97ccf 1524 dev->dev_flags |= DF_USING_ALIAS;
3011684c 1525
6708bb27 1526 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
c66ac9db 1527 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1528 config_item_name(&dev->dev_group.cg_item),
1529 dev->dev_alias);
c66ac9db
NB		 1530
1531 return read_bytes;
1532}
1533
1534static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1535 .attr = { .ca_owner = THIS_MODULE,
1536 .ca_name = "alias",
1537 .ca_mode = S_IRUGO | S_IWUSR },
1538 .show = target_core_show_dev_alias,
1539 .store = target_core_store_dev_alias,
1540};
1541
1542static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1543{
0fd97ccf 1544 struct se_device *dev = p;
c66ac9db 1545
0fd97ccf 1546 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
c66ac9db
NB		 1547 return 0;
1548
0fd97ccf 1549 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
c66ac9db
NB		 1550}
1551
1552static ssize_t target_core_store_dev_udev_path(
1553 void *p,
1554 const char *page,
1555 size_t count)
1556{
0fd97ccf
CH		 1557 struct se_device *dev = p;
1558 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1559 ssize_t read_bytes;
1560
1561 if (count > (SE_UDEV_PATH_LEN-1)) {
6708bb27 1562 pr_err("udev_path count: %d exceeds"
c66ac9db
NB		 1563 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1564 SE_UDEV_PATH_LEN-1);
1565 return -EINVAL;
1566 }
1567
0fd97ccf 1568 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
c66ac9db 1569 "%s", page);
3011684c
DC		 1570 if (!read_bytes)
1571 return -EINVAL;
0fd97ccf
CH		 1572 if (dev->udev_path[read_bytes - 1] == '\n')
1573 dev->udev_path[read_bytes - 1] = '\0';
0877eafd 1574
0fd97ccf 1575 dev->dev_flags |= DF_USING_UDEV_PATH;
3011684c 1576
6708bb27 1577 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
c66ac9db 1578 config_item_name(&hba->hba_group.cg_item),
0fd97ccf
CH		 1579 config_item_name(&dev->dev_group.cg_item),
1580 dev->udev_path);
c66ac9db
NB		 1581
1582 return read_bytes;
1583}
1584
1585static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1586 .attr = { .ca_owner = THIS_MODULE,
1587 .ca_name = "udev_path",
1588 .ca_mode = S_IRUGO | S_IWUSR },
1589 .show = target_core_show_dev_udev_path,
1590 .store = target_core_store_dev_udev_path,
1591};
1592
64146db7
AG		 1593static ssize_t target_core_show_dev_enable(void *p, char *page)
1594{
1595 struct se_device *dev = p;
1596
1597 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1598}
1599
c66ac9db
NB		 1600static ssize_t target_core_store_dev_enable(
1601 void *p,
1602 const char *page,
1603 size_t count)
1604{
0fd97ccf 1605 struct se_device *dev = p;
c66ac9db 1606 char *ptr;
0fd97ccf 1607 int ret;
c66ac9db
NB		 1608
1609 ptr = strstr(page, "1");
6708bb27
AG		 1610 if (!ptr) {
1611 pr_err("For dev_enable ops, only valid value"
c66ac9db
NB		 1612 " is \"1\"\n");
1613 return -EINVAL;
1614 }
c66ac9db 1615
0fd97ccf
CH		 1616 ret = target_configure_device(dev);
1617 if (ret)
1618 return ret;
c66ac9db
NB		 1619 return count;
1620}
1621
1622static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1623 .attr = { .ca_owner = THIS_MODULE,
1624 .ca_name = "enable",
64146db7
AG		 1625 .ca_mode = S_IRUGO | S_IWUSR },
1626 .show = target_core_show_dev_enable,
c66ac9db
NB		 1627 .store = target_core_store_dev_enable,
1628};
1629
1630static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1631{
0fd97ccf 1632 struct se_device *dev = p;
c66ac9db
NB		 1633 struct config_item *lu_ci;
1634 struct t10_alua_lu_gp *lu_gp;
1635 struct t10_alua_lu_gp_member *lu_gp_mem;
1636 ssize_t len = 0;
1637
c66ac9db 1638 lu_gp_mem = dev->dev_alua_lu_gp_mem;
c87fbd56
CH		 1639 if (!lu_gp_mem)
1640 return 0;
c66ac9db
NB		 1641
1642 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1643 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1644 if (lu_gp) {
c66ac9db
NB		 1645 lu_ci = &lu_gp->lu_gp_group.cg_item;
1646 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1647 config_item_name(lu_ci), lu_gp->lu_gp_id);
1648 }
1649 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1650
1651 return len;
1652}
1653
1654static ssize_t target_core_store_alua_lu_gp(
1655 void *p,
1656 const char *page,
1657 size_t count)
1658{
0fd97ccf
CH		 1659 struct se_device *dev = p;
1660 struct se_hba *hba = dev->se_hba;
c66ac9db
NB		 1661 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1662 struct t10_alua_lu_gp_member *lu_gp_mem;
1663 unsigned char buf[LU_GROUP_NAME_BUF];
1664 int move = 0;
1665
c87fbd56
CH		 1666 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1667 if (!lu_gp_mem)
1668 return 0;
1669
c66ac9db 1670 if (count > LU_GROUP_NAME_BUF) {
6708bb27 1671 pr_err("ALUA LU Group Alias too large!\n");
c66ac9db
NB		 1672 return -EINVAL;
1673 }
1674 memset(buf, 0, LU_GROUP_NAME_BUF);
1675 memcpy(buf, page, count);
1676 /*
1677 * Any ALUA logical unit alias besides "NULL" means we will be
1678 * making a new group association.
1679 */
1680 if (strcmp(strstrip(buf), "NULL")) {
1681 /*
1682 * core_alua_get_lu_gp_by_name() will increment reference to
1683 * struct t10_alua_lu_gp. This reference is released with
1684 * core_alua_get_lu_gp_by_name below().
1685 */
1686 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
6708bb27 1687 if (!lu_gp_new)
c66ac9db
NB		 1688 return -ENODEV;
1689 }
c66ac9db
NB		 1690
1691 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1692 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1693 if (lu_gp) {
c66ac9db
NB		 1694 /*
1695 * Clearing an existing lu_gp association, and replacing
1696 * with NULL
1697 */
6708bb27
AG		 1698 if (!lu_gp_new) {
1699 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
c66ac9db
NB		 1700 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1701 " %hu\n",
1702 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1703 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 1704 config_item_name(&lu_gp->lu_gp_group.cg_item),
1705 lu_gp->lu_gp_id);
1706
1707 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1708 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1709
1710 return count;
1711 }
1712 /*
1713 * Removing existing association of lu_gp_mem with lu_gp
1714 */
1715 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1716 move = 1;
1717 }
1718 /*
1719 * Associate lu_gp_mem with lu_gp_new.
1720 */
1721 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1722 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1723
6708bb27 1724 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
c66ac9db
NB		 1725 " core/alua/lu_gps/%s, ID: %hu\n",
1726 (move) ? "Moving" : "Adding",
1727 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1728 config_item_name(&dev->dev_group.cg_item),
c66ac9db
NB		 1729 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1730 lu_gp_new->lu_gp_id);
1731
1732 core_alua_put_lu_gp_from_name(lu_gp_new);
1733 return count;
1734}
1735
1736static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1737 .attr = { .ca_owner = THIS_MODULE,
1738 .ca_name = "alua_lu_gp",
1739 .ca_mode = S_IRUGO | S_IWUSR },
1740 .show = target_core_show_alua_lu_gp,
1741 .store = target_core_store_alua_lu_gp,
1742};
1743
1744static struct configfs_attribute *lio_core_dev_attrs[] = {
1745 &target_core_attr_dev_info.attr,
1746 &target_core_attr_dev_control.attr,
1747 &target_core_attr_dev_alias.attr,
1748 &target_core_attr_dev_udev_path.attr,
1749 &target_core_attr_dev_enable.attr,
1750 &target_core_attr_dev_alua_lu_gp.attr,
1751 NULL,
1752};
1753
1754static void target_core_dev_release(struct config_item *item)
1755{
0fd97ccf
CH		 1756 struct config_group *dev_cg = to_config_group(item);
1757 struct se_device *dev =
1758 container_of(dev_cg, struct se_device, dev_group);
c66ac9db 1759
c66ac9db 1760 kfree(dev_cg->default_groups);
0fd97ccf 1761 target_free_device(dev);
c66ac9db
NB		 1762}
1763
1764static ssize_t target_core_dev_show(struct config_item *item,
1765 struct configfs_attribute *attr,
1766 char *page)
1767{
0fd97ccf
CH		 1768 struct config_group *dev_cg = to_config_group(item);
1769 struct se_device *dev =
1770 container_of(dev_cg, struct se_device, dev_group);
c66ac9db
NB		 1771 struct target_core_configfs_attribute *tc_attr = container_of(
1772 attr, struct target_core_configfs_attribute, attr);
1773
6708bb27 1774 if (!tc_attr->show)
c66ac9db
NB		 1775 return -EINVAL;
1776
0fd97ccf 1777 return tc_attr->show(dev, page);
c66ac9db
NB		 1778}
1779
1780static ssize_t target_core_dev_store(struct config_item *item,
1781 struct configfs_attribute *attr,
1782 const char *page, size_t count)
1783{
0fd97ccf
CH		 1784 struct config_group *dev_cg = to_config_group(item);
1785 struct se_device *dev =
1786 container_of(dev_cg, struct se_device, dev_group);
c66ac9db
NB		 1787 struct target_core_configfs_attribute *tc_attr = container_of(
1788 attr, struct target_core_configfs_attribute, attr);
1789
6708bb27 1790 if (!tc_attr->store)
c66ac9db
NB		 1791 return -EINVAL;
1792
0fd97ccf 1793 return tc_attr->store(dev, page, count);
c66ac9db
NB		 1794}
1795
1796static struct configfs_item_operations target_core_dev_item_ops = {
1797 .release = target_core_dev_release,
1798 .show_attribute = target_core_dev_show,
1799 .store_attribute = target_core_dev_store,
1800};
1801
1802static struct config_item_type target_core_dev_cit = {
1803 .ct_item_ops = &target_core_dev_item_ops,
1804 .ct_attrs = lio_core_dev_attrs,
1805 .ct_owner = THIS_MODULE,
1806};
1807
1808/* End functions for struct config_item_type target_core_dev_cit */
1809
1810/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1811
1812CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1813#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1814static struct target_core_alua_lu_gp_attribute \
1815 target_core_alua_lu_gp_##_name = \
1816 __CONFIGFS_EATTR(_name, _mode, \
1817 target_core_alua_lu_gp_show_attr_##_name, \
1818 target_core_alua_lu_gp_store_attr_##_name);
1819
1820#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1821static struct target_core_alua_lu_gp_attribute \
1822 target_core_alua_lu_gp_##_name = \
1823 __CONFIGFS_EATTR_RO(_name, \
1824 target_core_alua_lu_gp_show_attr_##_name);
1825
1826/*
1827 * lu_gp_id
1828 */
1829static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1830 struct t10_alua_lu_gp *lu_gp,
1831 char *page)
1832{
6708bb27 1833 if (!lu_gp->lu_gp_valid_id)
c66ac9db
NB		 1834 return 0;
1835
1836 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1837}
1838
1839static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1840 struct t10_alua_lu_gp *lu_gp,
1841 const char *page,
1842 size_t count)
1843{
1844 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1845 unsigned long lu_gp_id;
1846 int ret;
1847
57103d7f 1848 ret = kstrtoul(page, 0, &lu_gp_id);
c66ac9db 1849 if (ret < 0) {
57103d7f 1850 pr_err("kstrtoul() returned %d for"
c66ac9db 1851 " lu_gp_id\n", ret);
57103d7f 1852 return ret;
c66ac9db
NB		 1853 }
1854 if (lu_gp_id > 0x0000ffff) {
6708bb27 1855 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 1856 " 0x0000ffff\n", lu_gp_id);
1857 return -EINVAL;
1858 }
1859
1860 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1861 if (ret < 0)
1862 return -EINVAL;
1863
6708bb27 1864 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
c66ac9db
NB		 1865 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1866 config_item_name(&alua_lu_gp_cg->cg_item),
1867 lu_gp->lu_gp_id);
1868
1869 return count;
1870}
1871
1872SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1873
1874/*
1875 * members
1876 */
1877static ssize_t target_core_alua_lu_gp_show_attr_members(
1878 struct t10_alua_lu_gp *lu_gp,
1879 char *page)
1880{
1881 struct se_device *dev;
1882 struct se_hba *hba;
c66ac9db
NB		 1883 struct t10_alua_lu_gp_member *lu_gp_mem;
1884 ssize_t len = 0, cur_len;
1885 unsigned char buf[LU_GROUP_NAME_BUF];
1886
1887 memset(buf, 0, LU_GROUP_NAME_BUF);
1888
1889 spin_lock(&lu_gp->lu_gp_lock);
1890 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1891 dev = lu_gp_mem->lu_gp_mem_dev;
0fd97ccf 1892 hba = dev->se_hba;
c66ac9db
NB		 1893
1894 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1895 config_item_name(&hba->hba_group.cg_item),
0fd97ccf 1896 config_item_name(&dev->dev_group.cg_item));
c66ac9db
NB		 1897 cur_len++; /* Extra byte for NULL terminator */
1898
1899 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 1900 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 1901 "_members buffer\n");
1902 break;
1903 }
1904 memcpy(page+len, buf, cur_len);
1905 len += cur_len;
1906 }
1907 spin_unlock(&lu_gp->lu_gp_lock);
1908
1909 return len;
1910}
1911
1912SE_DEV_ALUA_LU_ATTR_RO(members);
1913
1914CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1915
1916static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1917 &target_core_alua_lu_gp_lu_gp_id.attr,
1918 &target_core_alua_lu_gp_members.attr,
1919 NULL,
1920};
1921
1f6fe7cb
NB		 1922static void target_core_alua_lu_gp_release(struct config_item *item)
1923{
1924 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1925 struct t10_alua_lu_gp, lu_gp_group);
1926
1927 core_alua_free_lu_gp(lu_gp);
1928}
1929
c66ac9db 1930static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1f6fe7cb 1931 .release = target_core_alua_lu_gp_release,
c66ac9db
NB		 1932 .show_attribute = target_core_alua_lu_gp_attr_show,
1933 .store_attribute = target_core_alua_lu_gp_attr_store,
1934};
1935
1936static struct config_item_type target_core_alua_lu_gp_cit = {
1937 .ct_item_ops = &target_core_alua_lu_gp_ops,
1938 .ct_attrs = target_core_alua_lu_gp_attrs,
1939 .ct_owner = THIS_MODULE,
1940};
1941
1942/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1943
1944/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1945
1946static struct config_group *target_core_alua_create_lu_gp(
1947 struct config_group *group,
1948 const char *name)
1949{
1950 struct t10_alua_lu_gp *lu_gp;
1951 struct config_group *alua_lu_gp_cg = NULL;
1952 struct config_item *alua_lu_gp_ci = NULL;
1953
1954 lu_gp = core_alua_allocate_lu_gp(name, 0);
1955 if (IS_ERR(lu_gp))
1956 return NULL;
1957
1958 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1959 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1960
1961 config_group_init_type_name(alua_lu_gp_cg, name,
1962 &target_core_alua_lu_gp_cit);
1963
6708bb27 1964 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
c66ac9db
NB		 1965 " Group: core/alua/lu_gps/%s\n",
1966 config_item_name(alua_lu_gp_ci));
1967
1968 return alua_lu_gp_cg;
1969
1970}
1971
1972static void target_core_alua_drop_lu_gp(
1973 struct config_group *group,
1974 struct config_item *item)
1975{
1976 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1977 struct t10_alua_lu_gp, lu_gp_group);
1978
6708bb27 1979 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
c66ac9db
NB		 1980 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1981 config_item_name(item), lu_gp->lu_gp_id);
1f6fe7cb
NB		 1982 /*
1983 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1984 * -> target_core_alua_lu_gp_release()
1985 */
c66ac9db 1986 config_item_put(item);
c66ac9db
NB		 1987}
1988
1989static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1990 .make_group = &target_core_alua_create_lu_gp,
1991 .drop_item = &target_core_alua_drop_lu_gp,
1992};
1993
1994static struct config_item_type target_core_alua_lu_gps_cit = {
1995 .ct_item_ops = NULL,
1996 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1997 .ct_owner = THIS_MODULE,
1998};
1999
2000/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2001
2002/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2003
2004CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2005#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2006static struct target_core_alua_tg_pt_gp_attribute \
2007 target_core_alua_tg_pt_gp_##_name = \
2008 __CONFIGFS_EATTR(_name, _mode, \
2009 target_core_alua_tg_pt_gp_show_attr_##_name, \
2010 target_core_alua_tg_pt_gp_store_attr_##_name);
2011
2012#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2013static struct target_core_alua_tg_pt_gp_attribute \
2014 target_core_alua_tg_pt_gp_##_name = \
2015 __CONFIGFS_EATTR_RO(_name, \
2016 target_core_alua_tg_pt_gp_show_attr_##_name);
2017
2018/*
2019 * alua_access_state
2020 */
2021static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2022 struct t10_alua_tg_pt_gp *tg_pt_gp,
2023 char *page)
2024{
2025 return sprintf(page, "%d\n",
2026 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2027}
2028
2029static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2030 struct t10_alua_tg_pt_gp *tg_pt_gp,
2031 const char *page,
2032 size_t count)
2033{
0fd97ccf 2034 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
c66ac9db
NB		 2035 unsigned long tmp;
2036 int new_state, ret;
2037
6708bb27 2038 if (!tg_pt_gp->tg_pt_gp_valid_id) {
125d0119 2039 pr_err("Unable to do implicit ALUA on non valid"
c66ac9db
NB		 2040 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2041 return -EINVAL;
2042 }
2043
57103d7f 2044 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2045 if (ret < 0) {
6708bb27 2046 pr_err("Unable to extract new ALUA access state from"
c66ac9db 2047 " %s\n", page);
57103d7f 2048 return ret;
c66ac9db
NB		 2049 }
2050 new_state = (int)tmp;
2051
125d0119
HR		 2052 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2053 pr_err("Unable to process implicit configfs ALUA"
2054 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
c66ac9db
NB		 2055 return -EINVAL;
2056 }
2057
0fd97ccf 2058 ret = core_alua_do_port_transition(tg_pt_gp, dev,
c66ac9db
NB		 2059 NULL, NULL, new_state, 0);
2060 return (!ret) ? count : -EINVAL;
2061}
2062
2063SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2064
2065/*
2066 * alua_access_status
2067 */
2068static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2069 struct t10_alua_tg_pt_gp *tg_pt_gp,
2070 char *page)
2071{
2072 return sprintf(page, "%s\n",
2073 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2074}
2075
2076static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2077 struct t10_alua_tg_pt_gp *tg_pt_gp,
2078 const char *page,
2079 size_t count)
2080{
2081 unsigned long tmp;
2082 int new_status, ret;
2083
6708bb27
AG		 2084 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2085 pr_err("Unable to do set ALUA access status on non"
c66ac9db
NB		 2086 " valid tg_pt_gp ID: %hu\n",
2087 tg_pt_gp->tg_pt_gp_valid_id);
2088 return -EINVAL;
2089 }
2090
57103d7f 2091 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2092 if (ret < 0) {
6708bb27 2093 pr_err("Unable to extract new ALUA access status"
c66ac9db 2094 " from %s\n", page);
57103d7f 2095 return ret;
c66ac9db
NB		 2096 }
2097 new_status = (int)tmp;
2098
2099 if ((new_status != ALUA_STATUS_NONE) &&
125d0119
HR		 2100 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2101 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
6708bb27 2102 pr_err("Illegal ALUA access status: 0x%02x\n",
c66ac9db
NB		 2103 new_status);
2104 return -EINVAL;
2105 }
2106
2107 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2108 return count;
2109}
2110
2111SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2112
2113/*
2114 * alua_access_type
2115 */
2116static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2117 struct t10_alua_tg_pt_gp *tg_pt_gp,
2118 char *page)
2119{
2120 return core_alua_show_access_type(tg_pt_gp, page);
2121}
2122
2123static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2124 struct t10_alua_tg_pt_gp *tg_pt_gp,
2125 const char *page,
2126 size_t count)
2127{
2128 return core_alua_store_access_type(tg_pt_gp, page, count);
2129}
2130
2131SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2132
6be526c4
HR		 2133/*
2134 * alua_supported_states
2135 */
2136static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_supported_states(
2137 struct t10_alua_tg_pt_gp *tg_pt_gp,
2138 char *page)
2139{
2140 return sprintf(page, "%02x\n",
2141 tg_pt_gp->tg_pt_gp_alua_supported_states);
2142}
2143
2144static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_supported_states(
2145 struct t10_alua_tg_pt_gp *tg_pt_gp,
2146 const char *page,
2147 size_t count)
2148{
2149 unsigned long tmp;
2150 int new_states, valid_states, ret;
2151
2152 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2153 pr_err("Unable to do set supported ALUA states on non"
2154 " valid tg_pt_gp ID: %hu\n",
2155 tg_pt_gp->tg_pt_gp_valid_id);
2156 return -EINVAL;
2157 }
2158
2159 ret = strict_strtoul(page, 0, &tmp);
2160 if (ret < 0) {
2161 pr_err("Unable to extract new supported ALUA states"
2162 " from %s\n", page);
2163 return -EINVAL;
2164 }
2165 new_states = (int)tmp;
2166 valid_states = ALUA_T_SUP | ALUA_O_SUP | ALUA_LBD_SUP | \
2167 ALUA_U_SUP | ALUA_S_SUP | ALUA_AN_SUP | ALUA_AO_SUP;
2168
2169
2170 if (new_states & ~valid_states) {
2171 pr_err("Illegal supported ALUA states: 0x%02x\n",
2172 new_states);
2173 return -EINVAL;
2174 }
2175
2176 tg_pt_gp->tg_pt_gp_alua_supported_states = new_states;
2177 return count;
2178}
2179
2180SE_DEV_ALUA_TG_PT_ATTR(alua_supported_states, S_IRUGO | S_IWUSR);
2181
c66ac9db
NB		 2182/*
2183 * alua_write_metadata
2184 */
2185static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2186 struct t10_alua_tg_pt_gp *tg_pt_gp,
2187 char *page)
2188{
2189 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2190}
2191
2192static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2193 struct t10_alua_tg_pt_gp *tg_pt_gp,
2194 const char *page,
2195 size_t count)
2196{
2197 unsigned long tmp;
2198 int ret;
2199
57103d7f 2200 ret = kstrtoul(page, 0, &tmp);
c66ac9db 2201 if (ret < 0) {
6708bb27 2202 pr_err("Unable to extract alua_write_metadata\n");
57103d7f 2203 return ret;
c66ac9db
NB		 2204 }
2205
2206 if ((tmp != 0) && (tmp != 1)) {
6708bb27 2207 pr_err("Illegal value for alua_write_metadata:"
c66ac9db
NB		 2208 " %lu\n", tmp);
2209 return -EINVAL;
2210 }
2211 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2212
2213 return count;
2214}
2215
2216SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2217
2218
2219
2220/*
2221 * nonop_delay_msecs
2222 */
2223static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2224 struct t10_alua_tg_pt_gp *tg_pt_gp,
2225 char *page)
2226{
2227 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2228
2229}
2230
2231static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2232 struct t10_alua_tg_pt_gp *tg_pt_gp,
2233 const char *page,
2234 size_t count)
2235{
2236 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2237}
2238
2239SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2240
2241/*
2242 * trans_delay_msecs
2243 */
2244static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2245 struct t10_alua_tg_pt_gp *tg_pt_gp,
2246 char *page)
2247{
2248 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2249}
2250
2251static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2252 struct t10_alua_tg_pt_gp *tg_pt_gp,
2253 const char *page,
2254 size_t count)
2255{
2256 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2257}
2258
2259SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2260
5b9a4d72 2261/*
125d0119 2262 * implicit_trans_secs
5b9a4d72 2263 */
125d0119 2264static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
5b9a4d72
NB		 2265 struct t10_alua_tg_pt_gp *tg_pt_gp,
2266 char *page)
2267{
125d0119 2268 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
5b9a4d72
NB		 2269}
2270
125d0119 2271static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
5b9a4d72
NB		 2272 struct t10_alua_tg_pt_gp *tg_pt_gp,
2273 const char *page,
2274 size_t count)
2275{
125d0119 2276 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
5b9a4d72
NB		 2277}
2278
125d0119 2279SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
5b9a4d72 2280
c66ac9db
NB		 2281/*
2282 * preferred
2283 */
2284
2285static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2286 struct t10_alua_tg_pt_gp *tg_pt_gp,
2287 char *page)
2288{
2289 return core_alua_show_preferred_bit(tg_pt_gp, page);
2290}
2291
2292static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2293 struct t10_alua_tg_pt_gp *tg_pt_gp,
2294 const char *page,
2295 size_t count)
2296{
2297 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2298}
2299
2300SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2301
2302/*
2303 * tg_pt_gp_id
2304 */
2305static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2306 struct t10_alua_tg_pt_gp *tg_pt_gp,
2307 char *page)
2308{
6708bb27 2309 if (!tg_pt_gp->tg_pt_gp_valid_id)
c66ac9db
NB		 2310 return 0;
2311
2312 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2313}
2314
2315static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2316 struct t10_alua_tg_pt_gp *tg_pt_gp,
2317 const char *page,
2318 size_t count)
2319{
2320 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2321 unsigned long tg_pt_gp_id;
2322 int ret;
2323
57103d7f 2324 ret = kstrtoul(page, 0, &tg_pt_gp_id);
c66ac9db 2325 if (ret < 0) {
57103d7f 2326 pr_err("kstrtoul() returned %d for"
c66ac9db 2327 " tg_pt_gp_id\n", ret);
57103d7f 2328 return ret;
c66ac9db
NB		 2329 }
2330 if (tg_pt_gp_id > 0x0000ffff) {
6708bb27 2331 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2332 " 0x0000ffff\n", tg_pt_gp_id);
2333 return -EINVAL;
2334 }
2335
2336 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2337 if (ret < 0)
2338 return -EINVAL;
2339
6708bb27 2340 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
c66ac9db
NB		 2341 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2342 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2343 tg_pt_gp->tg_pt_gp_id);
2344
2345 return count;
2346}
2347
2348SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2349
2350/*
2351 * members
2352 */
2353static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2354 struct t10_alua_tg_pt_gp *tg_pt_gp,
2355 char *page)
2356{
2357 struct se_port *port;
2358 struct se_portal_group *tpg;
2359 struct se_lun *lun;
2360 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2361 ssize_t len = 0, cur_len;
2362 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2363
2364 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2365
2366 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2367 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2368 tg_pt_gp_mem_list) {
2369 port = tg_pt_gp_mem->tg_pt;
2370 tpg = port->sep_tpg;
2371 lun = port->sep_lun;
2372
2373 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
e3d6f909
AG		 2374 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2375 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2376 tpg->se_tpg_tfo->tpg_get_tag(tpg),
c66ac9db
NB		 2377 config_item_name(&lun->lun_group.cg_item));
2378 cur_len++; /* Extra byte for NULL terminator */
2379
2380 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2381 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2382 "_members buffer\n");
2383 break;
2384 }
2385 memcpy(page+len, buf, cur_len);
2386 len += cur_len;
2387 }
2388 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2389
2390 return len;
2391}
2392
2393SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2394
2395CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2396 tg_pt_gp_group);
2397
2398static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2399 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2400 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2401 &target_core_alua_tg_pt_gp_alua_access_type.attr,
6be526c4 2402 &target_core_alua_tg_pt_gp_alua_supported_states.attr,
c66ac9db
NB		 2403 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2404 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2405 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
125d0119 2406 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
c66ac9db
NB		 2407 &target_core_alua_tg_pt_gp_preferred.attr,
2408 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2409 &target_core_alua_tg_pt_gp_members.attr,
2410 NULL,
2411};
2412
1f6fe7cb
NB		 2413static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2414{
2415 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2416 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2417
2418 core_alua_free_tg_pt_gp(tg_pt_gp);
2419}
2420
c66ac9db 2421static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
1f6fe7cb 2422 .release = target_core_alua_tg_pt_gp_release,
c66ac9db
NB		 2423 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2424 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2425};
2426
2427static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2428 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2429 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2430 .ct_owner = THIS_MODULE,
2431};
2432
2433/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2434
2435/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2436
2437static struct config_group *target_core_alua_create_tg_pt_gp(
2438 struct config_group *group,
2439 const char *name)
2440{
2441 struct t10_alua *alua = container_of(group, struct t10_alua,
2442 alua_tg_pt_gps_group);
2443 struct t10_alua_tg_pt_gp *tg_pt_gp;
c66ac9db
NB		 2444 struct config_group *alua_tg_pt_gp_cg = NULL;
2445 struct config_item *alua_tg_pt_gp_ci = NULL;
2446
0fd97ccf 2447 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
6708bb27 2448 if (!tg_pt_gp)
c66ac9db
NB		 2449 return NULL;
2450
2451 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2452 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2453
2454 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2455 &target_core_alua_tg_pt_gp_cit);
2456
6708bb27 2457 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
c66ac9db
NB		 2458 " Group: alua/tg_pt_gps/%s\n",
2459 config_item_name(alua_tg_pt_gp_ci));
2460
2461 return alua_tg_pt_gp_cg;
2462}
2463
2464static void target_core_alua_drop_tg_pt_gp(
2465 struct config_group *group,
2466 struct config_item *item)
2467{
2468 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2469 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2470
6708bb27 2471 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
c66ac9db
NB		 2472 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2473 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
1f6fe7cb
NB		 2474 /*
2475 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2476 * -> target_core_alua_tg_pt_gp_release().
2477 */
c66ac9db 2478 config_item_put(item);
c66ac9db
NB		 2479}
2480
2481static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2482 .make_group = &target_core_alua_create_tg_pt_gp,
2483 .drop_item = &target_core_alua_drop_tg_pt_gp,
2484};
2485
2486static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2487 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2488 .ct_owner = THIS_MODULE,
2489};
2490
2491/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2492
2493/* Start functions for struct config_item_type target_core_alua_cit */
2494
2495/*
2496 * target_core_alua_cit is a ConfigFS group that lives under
2497 * /sys/kernel/config/target/core/alua. There are default groups
2498 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2499 * target_core_alua_cit in target_core_init_configfs() below.
2500 */
2501static struct config_item_type target_core_alua_cit = {
2502 .ct_item_ops = NULL,
2503 .ct_attrs = NULL,
2504 .ct_owner = THIS_MODULE,
2505};
2506
2507/* End functions for struct config_item_type target_core_alua_cit */
2508
12d23384
NB		 2509/* Start functions for struct config_item_type target_core_stat_cit */
2510
2511static struct config_group *target_core_stat_mkdir(
2512 struct config_group *group,
2513 const char *name)
2514{
2515 return ERR_PTR(-ENOSYS);
2516}
2517
2518static void target_core_stat_rmdir(
2519 struct config_group *group,
2520 struct config_item *item)
2521{
2522 return;
2523}
2524
2525static struct configfs_group_operations target_core_stat_group_ops = {
2526 .make_group = &target_core_stat_mkdir,
2527 .drop_item = &target_core_stat_rmdir,
2528};
2529
2530static struct config_item_type target_core_stat_cit = {
2531 .ct_group_ops = &target_core_stat_group_ops,
2532 .ct_owner = THIS_MODULE,
2533};
2534
2535/* End functions for struct config_item_type target_core_stat_cit */
2536
c66ac9db
NB		 2537/* Start functions for struct config_item_type target_core_hba_cit */
2538
2539static struct config_group *target_core_make_subdev(
2540 struct config_group *group,
2541 const char *name)
2542{
2543 struct t10_alua_tg_pt_gp *tg_pt_gp;
c66ac9db
NB		 2544 struct se_subsystem_api *t;
2545 struct config_item *hba_ci = &group->cg_item;
2546 struct se_hba *hba = item_to_hba(hba_ci);
0fd97ccf 2547 struct se_device *dev;
c66ac9db 2548 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
12d23384
NB		 2549 struct config_group *dev_stat_grp = NULL;
2550 int errno = -ENOMEM, ret;
c66ac9db 2551
12d23384
NB		 2552 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2553 if (ret)
2554 return ERR_PTR(ret);
c66ac9db
NB		 2555 /*
2556 * Locate the struct se_subsystem_api from parent's struct se_hba.
2557 */
2558 t = hba->transport;
2559
0fd97ccf
CH		 2560 dev = target_alloc_device(hba, name);
2561 if (!dev)
2562 goto out_unlock;
2563
2564 dev_cg = &dev->dev_group;
c66ac9db 2565
13f6a914 2566 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
c66ac9db 2567 GFP_KERNEL);
6708bb27 2568 if (!dev_cg->default_groups)
0fd97ccf 2569 goto out_free_device;
c66ac9db 2570
0fd97ccf
CH		 2571 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2572 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
c66ac9db 2573 &target_core_dev_attrib_cit);
0fd97ccf 2574 config_group_init_type_name(&dev->dev_pr_group, "pr",
c66ac9db 2575 &target_core_dev_pr_cit);
0fd97ccf 2576 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
c66ac9db 2577 &target_core_dev_wwn_cit);
0fd97ccf 2578 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
c66ac9db 2579 "alua", &target_core_alua_tg_pt_gps_cit);
0fd97ccf 2580 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
12d23384
NB		 2581 "statistics", &target_core_stat_cit);
2582
0fd97ccf
CH		 2583 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2584 dev_cg->default_groups[1] = &dev->dev_pr_group;
2585 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2586 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2587 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
12d23384 2588 dev_cg->default_groups[5] = NULL;
c66ac9db 2589 /*
12d23384 2590 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
c66ac9db 2591 */
0fd97ccf 2592 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
6708bb27 2593 if (!tg_pt_gp)
0fd97ccf
CH		 2594 goto out_free_dev_cg_default_groups;
2595 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
c66ac9db 2596
0fd97ccf 2597 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
13f6a914 2598 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2599 GFP_KERNEL);
6708bb27
AG		 2600 if (!tg_pt_gp_cg->default_groups) {
2601 pr_err("Unable to allocate tg_pt_gp_cg->"
c66ac9db 2602 "default_groups\n");
0fd97ccf 2603 goto out_free_tg_pt_gp;
c66ac9db
NB		 2604 }
2605
2606 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2607 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2608 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2609 tg_pt_gp_cg->default_groups[1] = NULL;
12d23384
NB		 2610 /*
2611 * Add core/$HBA/$DEV/statistics/ default groups
2612 */
0fd97ccf 2613 dev_stat_grp = &dev->dev_stat_grps.stat_group;
13f6a914 2614 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
12d23384
NB		 2615 GFP_KERNEL);
2616 if (!dev_stat_grp->default_groups) {
6708bb27 2617 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
0fd97ccf 2618 goto out_free_tg_pt_gp_cg_default_groups;
12d23384 2619 }
0fd97ccf 2620 target_stat_setup_dev_default_groups(dev);
c66ac9db
NB		 2621
2622 mutex_unlock(&hba->hba_access_mutex);
0fd97ccf
CH		 2623 return dev_cg;
2624
2625out_free_tg_pt_gp_cg_default_groups:
2626 kfree(tg_pt_gp_cg->default_groups);
2627out_free_tg_pt_gp:
2628 core_alua_free_tg_pt_gp(tg_pt_gp);
2629out_free_dev_cg_default_groups:
2630 kfree(dev_cg->default_groups);
2631out_free_device:
2632 target_free_device(dev);
2633out_unlock:
c66ac9db 2634 mutex_unlock(&hba->hba_access_mutex);
12d23384 2635 return ERR_PTR(errno);
c66ac9db
NB		 2636}
2637
2638static void target_core_drop_subdev(
2639 struct config_group *group,
2640 struct config_item *item)
2641{
0fd97ccf
CH		 2642 struct config_group *dev_cg = to_config_group(item);
2643 struct se_device *dev =
2644 container_of(dev_cg, struct se_device, dev_group);
c66ac9db 2645 struct se_hba *hba;
c66ac9db 2646 struct config_item *df_item;
0fd97ccf 2647 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
1f6fe7cb 2648 int i;
c66ac9db 2649
0fd97ccf 2650 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
c66ac9db 2651
1f6fe7cb 2652 mutex_lock(&hba->hba_access_mutex);
c66ac9db 2653
0fd97ccf 2654 dev_stat_grp = &dev->dev_stat_grps.stat_group;
12d23384
NB		 2655 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2656 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2657 dev_stat_grp->default_groups[i] = NULL;
2658 config_item_put(df_item);
2659 }
2660 kfree(dev_stat_grp->default_groups);
2661
0fd97ccf 2662 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2663 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2664 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2665 tg_pt_gp_cg->default_groups[i] = NULL;
2666 config_item_put(df_item);
2667 }
2668 kfree(tg_pt_gp_cg->default_groups);
1f6fe7cb
NB		 2669 /*
2670 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2671 * directly from target_core_alua_tg_pt_gp_release().
2672 */
0fd97ccf 2673 dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db 2674
c66ac9db
NB		 2675 for (i = 0; dev_cg->default_groups[i]; i++) {
2676 df_item = &dev_cg->default_groups[i]->cg_item;
2677 dev_cg->default_groups[i] = NULL;
2678 config_item_put(df_item);
2679 }
c66ac9db 2680 /*
0fd97ccf 2681 * se_dev is released from target_core_dev_item_ops->release()
c66ac9db 2682 */
1f6fe7cb 2683 config_item_put(item);
c66ac9db 2684 mutex_unlock(&hba->hba_access_mutex);
c66ac9db
NB		 2685}
2686
2687static struct configfs_group_operations target_core_hba_group_ops = {
2688 .make_group = target_core_make_subdev,
2689 .drop_item = target_core_drop_subdev,
2690};
2691
2692CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2693#define SE_HBA_ATTR(_name, _mode) \
2694static struct target_core_hba_attribute \
2695 target_core_hba_##_name = \
2696 __CONFIGFS_EATTR(_name, _mode, \
2697 target_core_hba_show_attr_##_name, \
2698 target_core_hba_store_attr_##_name);
2699
2700#define SE_HBA_ATTR_RO(_name) \
2701static struct target_core_hba_attribute \
2702 target_core_hba_##_name = \
2703 __CONFIGFS_EATTR_RO(_name, \
2704 target_core_hba_show_attr_##_name);
2705
2706static ssize_t target_core_hba_show_attr_hba_info(
2707 struct se_hba *hba,
2708 char *page)
2709{
2710 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2711 hba->hba_id, hba->transport->name,
2712 TARGET_CORE_CONFIGFS_VERSION);
2713}
2714
2715SE_HBA_ATTR_RO(hba_info);
2716
2717static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2718 char *page)
2719{
2720 int hba_mode = 0;
2721
2722 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2723 hba_mode = 1;
2724
2725 return sprintf(page, "%d\n", hba_mode);
2726}
2727
2728static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2729 const char *page, size_t count)
2730{
2731 struct se_subsystem_api *transport = hba->transport;
2732 unsigned long mode_flag;
2733 int ret;
2734
2735 if (transport->pmode_enable_hba == NULL)
2736 return -EINVAL;
2737
57103d7f 2738 ret = kstrtoul(page, 0, &mode_flag);
c66ac9db 2739 if (ret < 0) {
6708bb27 2740 pr_err("Unable to extract hba mode flag: %d\n", ret);
57103d7f 2741 return ret;
c66ac9db
NB		 2742 }
2743
0fd97ccf 2744 if (hba->dev_count) {
6708bb27 2745 pr_err("Unable to set hba_mode with active devices\n");
c66ac9db
NB		 2746 return -EINVAL;
2747 }
c66ac9db
NB		 2748
2749 ret = transport->pmode_enable_hba(hba, mode_flag);
2750 if (ret < 0)
2751 return -EINVAL;
2752 if (ret > 0)
2753 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2754 else if (ret == 0)
2755 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2756
2757 return count;
2758}
2759
2760SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2761
2762CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2763
1f6fe7cb
NB		 2764static void target_core_hba_release(struct config_item *item)
2765{
2766 struct se_hba *hba = container_of(to_config_group(item),
2767 struct se_hba, hba_group);
2768 core_delete_hba(hba);
2769}
2770
c66ac9db
NB		 2771static struct configfs_attribute *target_core_hba_attrs[] = {
2772 &target_core_hba_hba_info.attr,
2773 &target_core_hba_hba_mode.attr,
2774 NULL,
2775};
2776
2777static struct configfs_item_operations target_core_hba_item_ops = {
1f6fe7cb 2778 .release = target_core_hba_release,
c66ac9db
NB		 2779 .show_attribute = target_core_hba_attr_show,
2780 .store_attribute = target_core_hba_attr_store,
2781};
2782
2783static struct config_item_type target_core_hba_cit = {
2784 .ct_item_ops = &target_core_hba_item_ops,
2785 .ct_group_ops = &target_core_hba_group_ops,
2786 .ct_attrs = target_core_hba_attrs,
2787 .ct_owner = THIS_MODULE,
2788};
2789
2790static struct config_group *target_core_call_addhbatotarget(
2791 struct config_group *group,
2792 const char *name)
2793{
2794 char *se_plugin_str, *str, *str2;
2795 struct se_hba *hba;
2796 char buf[TARGET_CORE_NAME_MAX_LEN];
2797 unsigned long plugin_dep_id = 0;
2798 int ret;
2799
2800 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
60d645a4 2801 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
6708bb27 2802 pr_err("Passed *name strlen(): %d exceeds"
c66ac9db
NB		 2803 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2804 TARGET_CORE_NAME_MAX_LEN);
2805 return ERR_PTR(-ENAMETOOLONG);
2806 }
2807 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2808
2809 str = strstr(buf, "_");
6708bb27
AG		 2810 if (!str) {
2811 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
c66ac9db
NB		 2812 return ERR_PTR(-EINVAL);
2813 }
2814 se_plugin_str = buf;
2815 /*
2816 * Special case for subsystem plugins that have "_" in their names.
2817 * Namely rd_direct and rd_mcp..
2818 */
2819 str2 = strstr(str+1, "_");
6708bb27 2820 if (str2) {
c66ac9db
NB		 2821 *str2 = '\0'; /* Terminate for *se_plugin_str */
2822 str2++; /* Skip to start of plugin dependent ID */
2823 str = str2;
2824 } else {
2825 *str = '\0'; /* Terminate for *se_plugin_str */
2826 str++; /* Skip to start of plugin dependent ID */
2827 }
2828
57103d7f 2829 ret = kstrtoul(str, 0, &plugin_dep_id);
c66ac9db 2830 if (ret < 0) {
57103d7f 2831 pr_err("kstrtoul() returned %d for"
c66ac9db 2832 " plugin_dep_id\n", ret);
57103d7f 2833 return ERR_PTR(ret);
c66ac9db
NB		 2834 }
2835 /*
2836 * Load up TCM subsystem plugins if they have not already been loaded.
2837 */
dbc5623e 2838 transport_subsystem_check_init();
c66ac9db
NB		 2839
2840 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2841 if (IS_ERR(hba))
2842 return ERR_CAST(hba);
2843
2844 config_group_init_type_name(&hba->hba_group, name,
2845 &target_core_hba_cit);
2846
2847 return &hba->hba_group;
2848}
2849
2850static void target_core_call_delhbafromtarget(
2851 struct config_group *group,
2852 struct config_item *item)
2853{
1f6fe7cb
NB		 2854 /*
2855 * core_delete_hba() is called from target_core_hba_item_ops->release()
2856 * -> target_core_hba_release()
2857 */
c66ac9db 2858 config_item_put(item);
c66ac9db
NB		 2859}
2860
2861static struct configfs_group_operations target_core_group_ops = {
2862 .make_group = target_core_call_addhbatotarget,
2863 .drop_item = target_core_call_delhbafromtarget,
2864};
2865
2866static struct config_item_type target_core_cit = {
2867 .ct_item_ops = NULL,
2868 .ct_group_ops = &target_core_group_ops,
2869 .ct_attrs = NULL,
2870 .ct_owner = THIS_MODULE,
2871};
2872
2873/* Stop functions for struct config_item_type target_core_hba_cit */
2874
54550fab 2875static int __init target_core_init_configfs(void)
c66ac9db
NB		 2876{
2877 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2878 struct config_group *lu_gp_cg = NULL;
2879 struct configfs_subsystem *subsys;
c66ac9db
NB		 2880 struct t10_alua_lu_gp *lu_gp;
2881 int ret;
2882
6708bb27 2883 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
c66ac9db
NB		 2884 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2885 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2886
2887 subsys = target_core_subsystem[0];
2888 config_group_init(&subsys->su_group);
2889 mutex_init(&subsys->su_mutex);
2890
e3d6f909 2891 ret = init_se_kmem_caches();
c66ac9db 2892 if (ret < 0)
e3d6f909 2893 return ret;
c66ac9db
NB		 2894 /*
2895 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2896 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2897 */
2898 target_cg = &subsys->su_group;
13f6a914 2899 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
c66ac9db 2900 GFP_KERNEL);
6708bb27
AG		 2901 if (!target_cg->default_groups) {
2902 pr_err("Unable to allocate target_cg->default_groups\n");
37bb7899 2903 ret = -ENOMEM;
c66ac9db
NB		 2904 goto out_global;
2905 }
2906
e3d6f909 2907 config_group_init_type_name(&target_core_hbagroup,
c66ac9db 2908 "core", &target_core_cit);
e3d6f909 2909 target_cg->default_groups[0] = &target_core_hbagroup;
c66ac9db
NB		 2910 target_cg->default_groups[1] = NULL;
2911 /*
2912 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2913 */
e3d6f909 2914 hba_cg = &target_core_hbagroup;
13f6a914 2915 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2916 GFP_KERNEL);
6708bb27
AG		 2917 if (!hba_cg->default_groups) {
2918 pr_err("Unable to allocate hba_cg->default_groups\n");
37bb7899 2919 ret = -ENOMEM;
c66ac9db
NB		 2920 goto out_global;
2921 }
e3d6f909 2922 config_group_init_type_name(&alua_group,
c66ac9db 2923 "alua", &target_core_alua_cit);
e3d6f909 2924 hba_cg->default_groups[0] = &alua_group;
c66ac9db
NB		 2925 hba_cg->default_groups[1] = NULL;
2926 /*
2927 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2928 * groups under /sys/kernel/config/target/core/alua/
2929 */
e3d6f909 2930 alua_cg = &alua_group;
13f6a914 2931 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2932 GFP_KERNEL);
6708bb27
AG		 2933 if (!alua_cg->default_groups) {
2934 pr_err("Unable to allocate alua_cg->default_groups\n");
37bb7899 2935 ret = -ENOMEM;
c66ac9db
NB		 2936 goto out_global;
2937 }
2938
e3d6f909 2939 config_group_init_type_name(&alua_lu_gps_group,
c66ac9db 2940 "lu_gps", &target_core_alua_lu_gps_cit);
e3d6f909 2941 alua_cg->default_groups[0] = &alua_lu_gps_group;
c66ac9db
NB		 2942 alua_cg->default_groups[1] = NULL;
2943 /*
2944 * Add core/alua/lu_gps/default_lu_gp
2945 */
2946 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
37bb7899
PST		 2947 if (IS_ERR(lu_gp)) {
2948 ret = -ENOMEM;
c66ac9db 2949 goto out_global;
37bb7899 2950 }
c66ac9db 2951
e3d6f909 2952 lu_gp_cg = &alua_lu_gps_group;
13f6a914 2953 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
c66ac9db 2954 GFP_KERNEL);
6708bb27
AG		 2955 if (!lu_gp_cg->default_groups) {
2956 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
37bb7899 2957 ret = -ENOMEM;
c66ac9db
NB		 2958 goto out_global;
2959 }
2960
2961 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2962 &target_core_alua_lu_gp_cit);
2963 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2964 lu_gp_cg->default_groups[1] = NULL;
e3d6f909 2965 default_lu_gp = lu_gp;
c66ac9db
NB		 2966 /*
2967 * Register the target_core_mod subsystem with configfs.
2968 */
2969 ret = configfs_register_subsystem(subsys);
2970 if (ret < 0) {
6708bb27 2971 pr_err("Error %d while registering subsystem %s\n",
c66ac9db
NB		 2972 ret, subsys->su_group.cg_item.ci_namebuf);
2973 goto out_global;
2974 }
6708bb27 2975 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
c66ac9db
NB		 2976 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2977 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2978 /*
2979 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2980 */
2981 ret = rd_module_init();
2982 if (ret < 0)
2983 goto out;
2984
0d0f9dfb
RD		 2985 ret = core_dev_setup_virtual_lun0();
2986 if (ret < 0)
c66ac9db
NB		 2987 goto out;
2988
f99715ac
NB		 2989 ret = target_xcopy_setup_pt();
2990 if (ret < 0)
2991 goto out;
2992
c66ac9db
NB		 2993 return 0;
2994
2995out:
2996 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 2997 core_dev_release_virtual_lun0();
2998 rd_module_exit();
2999out_global:
e3d6f909
AG		 3000 if (default_lu_gp) {
3001 core_alua_free_lu_gp(default_lu_gp);
3002 default_lu_gp = NULL;
c66ac9db
NB		 3003 }
3004 if (lu_gp_cg)
3005 kfree(lu_gp_cg->default_groups);
3006 if (alua_cg)
3007 kfree(alua_cg->default_groups);
3008 if (hba_cg)
3009 kfree(hba_cg->default_groups);
3010 kfree(target_cg->default_groups);
e3d6f909
AG		 3011 release_se_kmem_caches();
3012 return ret;
c66ac9db
NB		 3013}
3014
54550fab 3015static void __exit target_core_exit_configfs(void)
c66ac9db
NB		 3016{
3017 struct configfs_subsystem *subsys;
3018 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3019 struct config_item *item;
3020 int i;
3021
c66ac9db
NB		 3022 subsys = target_core_subsystem[0];
3023
e3d6f909 3024 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3025 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3026 item = &lu_gp_cg->default_groups[i]->cg_item;
3027 lu_gp_cg->default_groups[i] = NULL;
3028 config_item_put(item);
3029 }
3030 kfree(lu_gp_cg->default_groups);
7c2bf6e9 3031 lu_gp_cg->default_groups = NULL;
c66ac9db 3032
e3d6f909 3033 alua_cg = &alua_group;
c66ac9db
NB		 3034 for (i = 0; alua_cg->default_groups[i]; i++) {
3035 item = &alua_cg->default_groups[i]->cg_item;
3036 alua_cg->default_groups[i] = NULL;
3037 config_item_put(item);
3038 }
3039 kfree(alua_cg->default_groups);
7c2bf6e9 3040 alua_cg->default_groups = NULL;
c66ac9db 3041
e3d6f909 3042 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3043 for (i = 0; hba_cg->default_groups[i]; i++) {
3044 item = &hba_cg->default_groups[i]->cg_item;
3045 hba_cg->default_groups[i] = NULL;
3046 config_item_put(item);
3047 }
3048 kfree(hba_cg->default_groups);
7c2bf6e9
NB		 3049 hba_cg->default_groups = NULL;
3050 /*
3051 * We expect subsys->su_group.default_groups to be released
3052 * by configfs subsystem provider logic..
3053 */
3054 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3055 kfree(subsys->su_group.default_groups);
3056
e3d6f909
AG		 3057 core_alua_free_lu_gp(default_lu_gp);
3058 default_lu_gp = NULL;
7c2bf6e9 3059
6708bb27 3060 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
c66ac9db
NB		 3061 " Infrastructure\n");
3062
c66ac9db
NB		 3063 core_dev_release_virtual_lun0();
3064 rd_module_exit();
f99715ac 3065 target_xcopy_release_pt();
e3d6f909 3066 release_se_kmem_caches();
c66ac9db
NB		 3067}
3068
3069MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3070MODULE_AUTHOR("nab@Linux-iSCSI.org");
3071MODULE_LICENSE("GPL");
3072
3073module_init(target_core_init_configfs);
3074module_exit(target_core_exit_configfs);
Linux 6.x block layer and io_uring tree(s)