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target: move the dereference below the NULL test
[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 *
12d23384
NB		 6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
c66ac9db
NB		 8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
c66ac9db
NB		 26#include <generated/utsrelease.h>
27#include <linux/utsname.h>
28#include <linux/init.h>
29#include <linux/fs.h>
30#include <linux/namei.h>
31#include <linux/slab.h>
32#include <linux/types.h>
33#include <linux/delay.h>
34#include <linux/unistd.h>
35#include <linux/string.h>
36#include <linux/parser.h>
37#include <linux/syscalls.h>
38#include <linux/configfs.h>
e3d6f909 39#include <linux/spinlock.h>
c66ac9db
NB		 40
41#include <target/target_core_base.h>
c4795fb2
CH		 42#include <target/target_core_backend.h>
43#include <target/target_core_fabric.h>
c66ac9db
NB		 44#include <target/target_core_fabric_configfs.h>
45#include <target/target_core_configfs.h>
46#include <target/configfs_macros.h>
47
e26d99ae 48#include "target_core_internal.h"
c66ac9db 49#include "target_core_alua.h"
c66ac9db
NB		 50#include "target_core_pr.h"
51#include "target_core_rd.h"
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",
c66ac9db
NB		 180 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
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,
187 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
189 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
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
272static struct configfs_subsystem *target_core_subsystem[] = {
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{ \
568 struct se_device *dev; \
569 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
570 ssize_t rb; \
571 \
572 spin_lock(&se_dev->se_dev_lock); \
573 dev = se_dev->se_dev_ptr; \
6708bb27 574 if (!dev) { \
c66ac9db
NB		 575 spin_unlock(&se_dev->se_dev_lock); \
576 return -ENODEV; \
577 } \
e3d6f909
AG		 578 rb = snprintf(page, PAGE_SIZE, "%u\n", \
579 (u32)dev->se_sub_dev->se_dev_attrib._name); \
c66ac9db
NB		 580 spin_unlock(&se_dev->se_dev_lock); \
581 \
582 return rb; \
583}
584
585#define DEF_DEV_ATTRIB_STORE(_name) \
586static ssize_t target_core_dev_store_attr_##_name( \
587 struct se_dev_attrib *da, \
588 const char *page, \
589 size_t count) \
590{ \
591 struct se_device *dev; \
592 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
593 unsigned long val; \
594 int ret; \
595 \
596 spin_lock(&se_dev->se_dev_lock); \
597 dev = se_dev->se_dev_ptr; \
6708bb27 598 if (!dev) { \
c66ac9db
NB		 599 spin_unlock(&se_dev->se_dev_lock); \
600 return -ENODEV; \
601 } \
602 ret = strict_strtoul(page, 0, &val); \
603 if (ret < 0) { \
604 spin_unlock(&se_dev->se_dev_lock); \
6708bb27 605 pr_err("strict_strtoul() failed with" \
c66ac9db
NB		 606 " ret: %d\n", ret); \
607 return -EINVAL; \
608 } \
609 ret = se_dev_set_##_name(dev, (u32)val); \
610 spin_unlock(&se_dev->se_dev_lock); \
611 \
612 return (!ret) ? count : -EINVAL; \
613}
614
615#define DEF_DEV_ATTRIB(_name) \
616DEF_DEV_ATTRIB_SHOW(_name); \
617DEF_DEV_ATTRIB_STORE(_name);
618
619#define DEF_DEV_ATTRIB_RO(_name) \
620DEF_DEV_ATTRIB_SHOW(_name);
621
622CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
623#define SE_DEV_ATTR(_name, _mode) \
624static struct target_core_dev_attrib_attribute \
625 target_core_dev_attrib_##_name = \
626 __CONFIGFS_EATTR(_name, _mode, \
627 target_core_dev_show_attr_##_name, \
628 target_core_dev_store_attr_##_name);
629
630#define SE_DEV_ATTR_RO(_name); \
631static struct target_core_dev_attrib_attribute \
632 target_core_dev_attrib_##_name = \
633 __CONFIGFS_EATTR_RO(_name, \
634 target_core_dev_show_attr_##_name);
635
636DEF_DEV_ATTRIB(emulate_dpo);
637SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
638
639DEF_DEV_ATTRIB(emulate_fua_write);
640SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
641
642DEF_DEV_ATTRIB(emulate_fua_read);
643SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
644
645DEF_DEV_ATTRIB(emulate_write_cache);
646SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
647
648DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
649SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
650
651DEF_DEV_ATTRIB(emulate_tas);
652SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
653
654DEF_DEV_ATTRIB(emulate_tpu);
655SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
656
657DEF_DEV_ATTRIB(emulate_tpws);
658SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
659
660DEF_DEV_ATTRIB(enforce_pr_isids);
661SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
662
e22a7f07
RD		 663DEF_DEV_ATTRIB(is_nonrot);
664SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
665
5de619a3
NB		 666DEF_DEV_ATTRIB(emulate_rest_reord);
667SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
668
c66ac9db
NB		 669DEF_DEV_ATTRIB_RO(hw_block_size);
670SE_DEV_ATTR_RO(hw_block_size);
671
672DEF_DEV_ATTRIB(block_size);
673SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
674
675DEF_DEV_ATTRIB_RO(hw_max_sectors);
676SE_DEV_ATTR_RO(hw_max_sectors);
677
015487b8
RD		 678DEF_DEV_ATTRIB(fabric_max_sectors);
679SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
680
c66ac9db
NB		 681DEF_DEV_ATTRIB(optimal_sectors);
682SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
683
684DEF_DEV_ATTRIB_RO(hw_queue_depth);
685SE_DEV_ATTR_RO(hw_queue_depth);
686
687DEF_DEV_ATTRIB(queue_depth);
688SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
689
c66ac9db
NB		 690DEF_DEV_ATTRIB(max_unmap_lba_count);
691SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
692
693DEF_DEV_ATTRIB(max_unmap_block_desc_count);
694SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
695
696DEF_DEV_ATTRIB(unmap_granularity);
697SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
698
699DEF_DEV_ATTRIB(unmap_granularity_alignment);
700SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
701
702CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
703
704static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
705 &target_core_dev_attrib_emulate_dpo.attr,
706 &target_core_dev_attrib_emulate_fua_write.attr,
707 &target_core_dev_attrib_emulate_fua_read.attr,
708 &target_core_dev_attrib_emulate_write_cache.attr,
709 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
710 &target_core_dev_attrib_emulate_tas.attr,
711 &target_core_dev_attrib_emulate_tpu.attr,
712 &target_core_dev_attrib_emulate_tpws.attr,
713 &target_core_dev_attrib_enforce_pr_isids.attr,
e22a7f07 714 &target_core_dev_attrib_is_nonrot.attr,
5de619a3 715 &target_core_dev_attrib_emulate_rest_reord.attr,
c66ac9db
NB		 716 &target_core_dev_attrib_hw_block_size.attr,
717 &target_core_dev_attrib_block_size.attr,
718 &target_core_dev_attrib_hw_max_sectors.attr,
015487b8 719 &target_core_dev_attrib_fabric_max_sectors.attr,
c66ac9db
NB		 720 &target_core_dev_attrib_optimal_sectors.attr,
721 &target_core_dev_attrib_hw_queue_depth.attr,
722 &target_core_dev_attrib_queue_depth.attr,
c66ac9db
NB		 723 &target_core_dev_attrib_max_unmap_lba_count.attr,
724 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
725 &target_core_dev_attrib_unmap_granularity.attr,
726 &target_core_dev_attrib_unmap_granularity_alignment.attr,
727 NULL,
728};
729
730static struct configfs_item_operations target_core_dev_attrib_ops = {
731 .show_attribute = target_core_dev_attrib_attr_show,
732 .store_attribute = target_core_dev_attrib_attr_store,
733};
734
735static struct config_item_type target_core_dev_attrib_cit = {
736 .ct_item_ops = &target_core_dev_attrib_ops,
737 .ct_attrs = target_core_dev_attrib_attrs,
738 .ct_owner = THIS_MODULE,
739};
740
741/* End functions for struct config_item_type target_core_dev_attrib_cit */
742
743/* Start functions for struct config_item_type target_core_dev_wwn_cit */
744
745CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
746#define SE_DEV_WWN_ATTR(_name, _mode) \
747static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
748 __CONFIGFS_EATTR(_name, _mode, \
749 target_core_dev_wwn_show_attr_##_name, \
750 target_core_dev_wwn_store_attr_##_name);
751
752#define SE_DEV_WWN_ATTR_RO(_name); \
753do { \
754 static struct target_core_dev_wwn_attribute \
755 target_core_dev_wwn_##_name = \
756 __CONFIGFS_EATTR_RO(_name, \
757 target_core_dev_wwn_show_attr_##_name); \
758} while (0);
759
760/*
761 * VPD page 0x80 Unit serial
762 */
763static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
764 struct t10_wwn *t10_wwn,
765 char *page)
766{
767 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
768 struct se_device *dev;
769
770 dev = se_dev->se_dev_ptr;
6708bb27 771 if (!dev)
c66ac9db
NB		 772 return -ENODEV;
773
774 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
775 &t10_wwn->unit_serial[0]);
776}
777
778static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
779 struct t10_wwn *t10_wwn,
780 const char *page,
781 size_t count)
782{
783 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
784 struct se_device *dev;
785 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
786
787 /*
788 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
789 * from the struct scsi_device level firmware, do not allow
790 * VPD Unit Serial to be emulated.
791 *
792 * Note this struct scsi_device could also be emulating VPD
793 * information from its drivers/scsi LLD. But for now we assume
794 * it is doing 'the right thing' wrt a world wide unique
795 * VPD Unit Serial Number that OS dependent multipath can depend on.
796 */
797 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
6708bb27 798 pr_err("Underlying SCSI device firmware provided VPD"
c66ac9db
NB		 799 " Unit Serial, ignoring request\n");
800 return -EOPNOTSUPP;
801 }
802
60d645a4 803 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
6708bb27 804 pr_err("Emulated VPD Unit Serial exceeds"
c66ac9db
NB		 805 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
806 return -EOVERFLOW;
807 }
808 /*
809 * Check to see if any active $FABRIC_MOD exports exist. If they
810 * do exist, fail here as changing this information on the fly
811 * (underneath the initiator side OS dependent multipath code)
812 * could cause negative effects.
813 */
814 dev = su_dev->se_dev_ptr;
6708bb27 815 if (dev) {
c66ac9db 816 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
6708bb27 817 pr_err("Unable to set VPD Unit Serial while"
c66ac9db
NB		 818 " active %d $FABRIC_MOD exports exist\n",
819 atomic_read(&dev->dev_export_obj.obj_access_count));
820 return -EINVAL;
821 }
822 }
823 /*
824 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
825 *
826 * Also, strip any newline added from the userspace
827 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
828 */
829 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
830 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
831 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
832 "%s", strstrip(buf));
833 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
834
6708bb27 835 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
c66ac9db
NB		 836 " %s\n", su_dev->t10_wwn.unit_serial);
837
838 return count;
839}
840
841SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
842
843/*
844 * VPD page 0x83 Protocol Identifier
845 */
846static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
847 struct t10_wwn *t10_wwn,
848 char *page)
849{
850 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
851 struct se_device *dev;
852 struct t10_vpd *vpd;
853 unsigned char buf[VPD_TMP_BUF_SIZE];
854 ssize_t len = 0;
855
856 dev = se_dev->se_dev_ptr;
6708bb27 857 if (!dev)
c66ac9db
NB		 858 return -ENODEV;
859
860 memset(buf, 0, VPD_TMP_BUF_SIZE);
861
862 spin_lock(&t10_wwn->t10_vpd_lock);
863 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
6708bb27 864 if (!vpd->protocol_identifier_set)
c66ac9db
NB		 865 continue;
866
867 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
868
6708bb27 869 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 870 break;
871
872 len += sprintf(page+len, "%s", buf);
873 }
874 spin_unlock(&t10_wwn->t10_vpd_lock);
875
876 return len;
877}
878
879static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
880 struct t10_wwn *t10_wwn,
881 const char *page,
882 size_t count)
883{
884 return -ENOSYS;
885}
886
887SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
888
889/*
890 * Generic wrapper for dumping VPD identifiers by association.
891 */
892#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
893static ssize_t target_core_dev_wwn_show_attr_##_name( \
894 struct t10_wwn *t10_wwn, \
895 char *page) \
896{ \
897 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
898 struct se_device *dev; \
899 struct t10_vpd *vpd; \
900 unsigned char buf[VPD_TMP_BUF_SIZE]; \
901 ssize_t len = 0; \
902 \
903 dev = se_dev->se_dev_ptr; \
6708bb27 904 if (!dev) \
c66ac9db
NB		 905 return -ENODEV; \
906 \
907 spin_lock(&t10_wwn->t10_vpd_lock); \
908 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
909 if (vpd->association != _assoc) \
910 continue; \
911 \
912 memset(buf, 0, VPD_TMP_BUF_SIZE); \
913 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 914 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 915 break; \
916 len += sprintf(page+len, "%s", buf); \
917 \
918 memset(buf, 0, VPD_TMP_BUF_SIZE); \
919 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 920 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 921 break; \
922 len += sprintf(page+len, "%s", buf); \
923 \
924 memset(buf, 0, VPD_TMP_BUF_SIZE); \
925 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 926 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 927 break; \
928 len += sprintf(page+len, "%s", buf); \
929 } \
930 spin_unlock(&t10_wwn->t10_vpd_lock); \
931 \
932 return len; \
933}
934
935/*
163cd5fa 936 * VPD page 0x83 Association: Logical Unit
c66ac9db
NB		 937 */
938DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
939
940static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
941 struct t10_wwn *t10_wwn,
942 const char *page,
943 size_t count)
944{
945 return -ENOSYS;
946}
947
948SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
949
950/*
951 * VPD page 0x83 Association: Target Port
952 */
953DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
954
955static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
956 struct t10_wwn *t10_wwn,
957 const char *page,
958 size_t count)
959{
960 return -ENOSYS;
961}
962
963SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
964
965/*
966 * VPD page 0x83 Association: SCSI Target Device
967 */
968DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
969
970static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
971 struct t10_wwn *t10_wwn,
972 const char *page,
973 size_t count)
974{
975 return -ENOSYS;
976}
977
978SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
979
980CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
981
982static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
983 &target_core_dev_wwn_vpd_unit_serial.attr,
984 &target_core_dev_wwn_vpd_protocol_identifier.attr,
985 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
986 &target_core_dev_wwn_vpd_assoc_target_port.attr,
987 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
988 NULL,
989};
990
991static struct configfs_item_operations target_core_dev_wwn_ops = {
992 .show_attribute = target_core_dev_wwn_attr_show,
993 .store_attribute = target_core_dev_wwn_attr_store,
994};
995
996static struct config_item_type target_core_dev_wwn_cit = {
997 .ct_item_ops = &target_core_dev_wwn_ops,
998 .ct_attrs = target_core_dev_wwn_attrs,
999 .ct_owner = THIS_MODULE,
1000};
1001
1002/* End functions for struct config_item_type target_core_dev_wwn_cit */
1003
1004/* Start functions for struct config_item_type target_core_dev_pr_cit */
1005
1006CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1007#define SE_DEV_PR_ATTR(_name, _mode) \
1008static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1009 __CONFIGFS_EATTR(_name, _mode, \
1010 target_core_dev_pr_show_attr_##_name, \
1011 target_core_dev_pr_store_attr_##_name);
1012
1013#define SE_DEV_PR_ATTR_RO(_name); \
1014static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1015 __CONFIGFS_EATTR_RO(_name, \
1016 target_core_dev_pr_show_attr_##_name);
1017
1018/*
1019 * res_holder
1020 */
1021static ssize_t target_core_dev_pr_show_spc3_res(
1022 struct se_device *dev,
1023 char *page,
1024 ssize_t *len)
1025{
1026 struct se_node_acl *se_nacl;
1027 struct t10_pr_registration *pr_reg;
1028 char i_buf[PR_REG_ISID_ID_LEN];
1029 int prf_isid;
1030
1031 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1032
1033 spin_lock(&dev->dev_reservation_lock);
1034 pr_reg = dev->dev_pr_res_holder;
6708bb27 1035 if (!pr_reg) {
c66ac9db
NB		 1036 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1037 spin_unlock(&dev->dev_reservation_lock);
1038 return *len;
1039 }
1040 se_nacl = pr_reg->pr_reg_nacl;
1041 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1042 PR_REG_ISID_ID_LEN);
1043
1044 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
e3d6f909 1045 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 1046 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1047 spin_unlock(&dev->dev_reservation_lock);
1048
1049 return *len;
1050}
1051
1052static ssize_t target_core_dev_pr_show_spc2_res(
1053 struct se_device *dev,
1054 char *page,
1055 ssize_t *len)
1056{
1057 struct se_node_acl *se_nacl;
1058
1059 spin_lock(&dev->dev_reservation_lock);
1060 se_nacl = dev->dev_reserved_node_acl;
6708bb27 1061 if (!se_nacl) {
c66ac9db
NB		 1062 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1063 spin_unlock(&dev->dev_reservation_lock);
1064 return *len;
1065 }
1066 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
e3d6f909 1067 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 1068 se_nacl->initiatorname);
1069 spin_unlock(&dev->dev_reservation_lock);
1070
1071 return *len;
1072}
1073
1074static ssize_t target_core_dev_pr_show_attr_res_holder(
1075 struct se_subsystem_dev *su_dev,
1076 char *page)
1077{
1078 ssize_t len = 0;
1079
6708bb27 1080 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1081 return -ENODEV;
1082
e3d6f909 1083 switch (su_dev->t10_pr.res_type) {
c66ac9db
NB		 1084 case SPC3_PERSISTENT_RESERVATIONS:
1085 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1086 page, &len);
1087 break;
1088 case SPC2_RESERVATIONS:
1089 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1090 page, &len);
1091 break;
1092 case SPC_PASSTHROUGH:
1093 len += sprintf(page+len, "Passthrough\n");
1094 break;
1095 default:
1096 len += sprintf(page+len, "Unknown\n");
1097 break;
1098 }
1099
1100 return len;
1101}
1102
1103SE_DEV_PR_ATTR_RO(res_holder);
1104
1105/*
1106 * res_pr_all_tgt_pts
1107 */
1108static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1109 struct se_subsystem_dev *su_dev,
1110 char *page)
1111{
1112 struct se_device *dev;
1113 struct t10_pr_registration *pr_reg;
1114 ssize_t len = 0;
1115
1116 dev = su_dev->se_dev_ptr;
6708bb27 1117 if (!dev)
c66ac9db
NB		 1118 return -ENODEV;
1119
e3d6f909 1120 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1121 return len;
1122
1123 spin_lock(&dev->dev_reservation_lock);
1124 pr_reg = dev->dev_pr_res_holder;
6708bb27 1125 if (!pr_reg) {
c66ac9db
NB		 1126 len = sprintf(page, "No SPC-3 Reservation holder\n");
1127 spin_unlock(&dev->dev_reservation_lock);
1128 return len;
1129 }
1130 /*
1131 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1132 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1133 */
1134 if (pr_reg->pr_reg_all_tg_pt)
1135 len = sprintf(page, "SPC-3 Reservation: All Target"
1136 " Ports registration\n");
1137 else
1138 len = sprintf(page, "SPC-3 Reservation: Single"
1139 " Target Port registration\n");
1140 spin_unlock(&dev->dev_reservation_lock);
1141
1142 return len;
1143}
1144
1145SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1146
1147/*
1148 * res_pr_generation
1149 */
1150static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1151 struct se_subsystem_dev *su_dev,
1152 char *page)
1153{
6708bb27 1154 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1155 return -ENODEV;
1156
e3d6f909 1157 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1158 return 0;
1159
e3d6f909 1160 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
c66ac9db
NB		 1161}
1162
1163SE_DEV_PR_ATTR_RO(res_pr_generation);
1164
1165/*
1166 * res_pr_holder_tg_port
1167 */
1168static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1169 struct se_subsystem_dev *su_dev,
1170 char *page)
1171{
1172 struct se_device *dev;
1173 struct se_node_acl *se_nacl;
1174 struct se_lun *lun;
1175 struct se_portal_group *se_tpg;
1176 struct t10_pr_registration *pr_reg;
1177 struct target_core_fabric_ops *tfo;
1178 ssize_t len = 0;
1179
1180 dev = su_dev->se_dev_ptr;
6708bb27 1181 if (!dev)
c66ac9db
NB		 1182 return -ENODEV;
1183
e3d6f909 1184 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1185 return len;
1186
1187 spin_lock(&dev->dev_reservation_lock);
1188 pr_reg = dev->dev_pr_res_holder;
6708bb27 1189 if (!pr_reg) {
c66ac9db
NB		 1190 len = sprintf(page, "No SPC-3 Reservation holder\n");
1191 spin_unlock(&dev->dev_reservation_lock);
1192 return len;
1193 }
1194 se_nacl = pr_reg->pr_reg_nacl;
1195 se_tpg = se_nacl->se_tpg;
1196 lun = pr_reg->pr_reg_tg_pt_lun;
e3d6f909 1197 tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 1198
1199 len += sprintf(page+len, "SPC-3 Reservation: %s"
1200 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1201 tfo->tpg_get_wwn(se_tpg));
1202 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
35d1efe8 1203 " Identifier Tag: %hu %s Portal Group Tag: %hu"
c66ac9db
NB		 1204 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1205 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1206 tfo->get_fabric_name(), lun->unpacked_lun);
1207 spin_unlock(&dev->dev_reservation_lock);
1208
1209 return len;
1210}
1211
1212SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1213
1214/*
1215 * res_pr_registered_i_pts
1216 */
1217static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1218 struct se_subsystem_dev *su_dev,
1219 char *page)
1220{
1221 struct target_core_fabric_ops *tfo;
1222 struct t10_pr_registration *pr_reg;
1223 unsigned char buf[384];
1224 char i_buf[PR_REG_ISID_ID_LEN];
1225 ssize_t len = 0;
1226 int reg_count = 0, prf_isid;
1227
6708bb27 1228 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1229 return -ENODEV;
1230
e3d6f909 1231 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1232 return len;
1233
1234 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1235
e3d6f909
AG		 1236 spin_lock(&su_dev->t10_pr.registration_lock);
1237 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
c66ac9db
NB		 1238 pr_reg_list) {
1239
1240 memset(buf, 0, 384);
1241 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1242 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1243 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1244 PR_REG_ISID_ID_LEN);
1245 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1246 tfo->get_fabric_name(),
1247 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1248 &i_buf[0] : "", pr_reg->pr_res_key,
1249 pr_reg->pr_res_generation);
1250
6708bb27 1251 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 1252 break;
1253
1254 len += sprintf(page+len, "%s", buf);
1255 reg_count++;
1256 }
e3d6f909 1257 spin_unlock(&su_dev->t10_pr.registration_lock);
c66ac9db 1258
6708bb27 1259 if (!reg_count)
c66ac9db
NB		 1260 len += sprintf(page+len, "None\n");
1261
1262 return len;
1263}
1264
1265SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1266
1267/*
1268 * res_pr_type
1269 */
1270static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1271 struct se_subsystem_dev *su_dev,
1272 char *page)
1273{
1274 struct se_device *dev;
1275 struct t10_pr_registration *pr_reg;
1276 ssize_t len = 0;
1277
1278 dev = su_dev->se_dev_ptr;
6708bb27 1279 if (!dev)
c66ac9db
NB		 1280 return -ENODEV;
1281
e3d6f909 1282 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1283 return len;
1284
1285 spin_lock(&dev->dev_reservation_lock);
1286 pr_reg = dev->dev_pr_res_holder;
6708bb27 1287 if (!pr_reg) {
c66ac9db
NB		 1288 len = sprintf(page, "No SPC-3 Reservation holder\n");
1289 spin_unlock(&dev->dev_reservation_lock);
1290 return len;
1291 }
1292 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1293 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1294 spin_unlock(&dev->dev_reservation_lock);
1295
1296 return len;
1297}
1298
1299SE_DEV_PR_ATTR_RO(res_pr_type);
1300
1301/*
1302 * res_type
1303 */
1304static ssize_t target_core_dev_pr_show_attr_res_type(
1305 struct se_subsystem_dev *su_dev,
1306 char *page)
1307{
1308 ssize_t len = 0;
1309
6708bb27 1310 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1311 return -ENODEV;
1312
e3d6f909 1313 switch (su_dev->t10_pr.res_type) {
c66ac9db
NB		 1314 case SPC3_PERSISTENT_RESERVATIONS:
1315 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1316 break;
1317 case SPC2_RESERVATIONS:
1318 len = sprintf(page, "SPC2_RESERVATIONS\n");
1319 break;
1320 case SPC_PASSTHROUGH:
1321 len = sprintf(page, "SPC_PASSTHROUGH\n");
1322 break;
1323 default:
1324 len = sprintf(page, "UNKNOWN\n");
1325 break;
1326 }
1327
1328 return len;
1329}
1330
1331SE_DEV_PR_ATTR_RO(res_type);
1332
1333/*
1334 * res_aptpl_active
1335 */
1336
1337static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1338 struct se_subsystem_dev *su_dev,
1339 char *page)
1340{
6708bb27 1341 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1342 return -ENODEV;
1343
e3d6f909 1344 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1345 return 0;
1346
1347 return sprintf(page, "APTPL Bit Status: %s\n",
e3d6f909 1348 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
c66ac9db
NB		 1349}
1350
1351SE_DEV_PR_ATTR_RO(res_aptpl_active);
1352
1353/*
1354 * res_aptpl_metadata
1355 */
1356static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1357 struct se_subsystem_dev *su_dev,
1358 char *page)
1359{
6708bb27 1360 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1361 return -ENODEV;
1362
e3d6f909 1363 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1364 return 0;
1365
1366 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1367}
1368
1369enum {
1370 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1371 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1372 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1373 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1374};
1375
1376static match_table_t tokens = {
1377 {Opt_initiator_fabric, "initiator_fabric=%s"},
1378 {Opt_initiator_node, "initiator_node=%s"},
1379 {Opt_initiator_sid, "initiator_sid=%s"},
1380 {Opt_sa_res_key, "sa_res_key=%s"},
1381 {Opt_res_holder, "res_holder=%d"},
1382 {Opt_res_type, "res_type=%d"},
1383 {Opt_res_scope, "res_scope=%d"},
1384 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1385 {Opt_mapped_lun, "mapped_lun=%d"},
1386 {Opt_target_fabric, "target_fabric=%s"},
1387 {Opt_target_node, "target_node=%s"},
1388 {Opt_tpgt, "tpgt=%d"},
1389 {Opt_port_rtpi, "port_rtpi=%d"},
1390 {Opt_target_lun, "target_lun=%d"},
1391 {Opt_err, NULL}
1392};
1393
1394static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1395 struct se_subsystem_dev *su_dev,
1396 const char *page,
1397 size_t count)
1398{
1399 struct se_device *dev;
6d180253
JJ		 1400 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1401 unsigned char *t_fabric = NULL, *t_port = NULL;
c66ac9db
NB		 1402 char *orig, *ptr, *arg_p, *opts;
1403 substring_t args[MAX_OPT_ARGS];
1404 unsigned long long tmp_ll;
1405 u64 sa_res_key = 0;
1406 u32 mapped_lun = 0, target_lun = 0;
1407 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1408 u16 port_rpti = 0, tpgt = 0;
1409 u8 type = 0, scope;
1410
1411 dev = su_dev->se_dev_ptr;
6708bb27 1412 if (!dev)
c66ac9db
NB		 1413 return -ENODEV;
1414
e3d6f909 1415 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1416 return 0;
1417
1418 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
6708bb27 1419 pr_debug("Unable to process APTPL metadata while"
c66ac9db
NB		 1420 " active fabric exports exist\n");
1421 return -EINVAL;
1422 }
1423
1424 opts = kstrdup(page, GFP_KERNEL);
1425 if (!opts)
1426 return -ENOMEM;
1427
1428 orig = opts;
90c161b6 1429 while ((ptr = strsep(&opts, ",\n")) != NULL) {
c66ac9db
NB		 1430 if (!*ptr)
1431 continue;
1432
1433 token = match_token(ptr, tokens, args);
1434 switch (token) {
1435 case Opt_initiator_fabric:
1436 i_fabric = match_strdup(&args[0]);
6d180253
JJ		 1437 if (!i_fabric) {
1438 ret = -ENOMEM;
1439 goto out;
1440 }
c66ac9db
NB		 1441 break;
1442 case Opt_initiator_node:
1443 i_port = match_strdup(&args[0]);
6d180253
JJ		 1444 if (!i_port) {
1445 ret = -ENOMEM;
1446 goto out;
1447 }
60d645a4 1448 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
6708bb27 1449 pr_err("APTPL metadata initiator_node="
c66ac9db
NB		 1450 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1451 PR_APTPL_MAX_IPORT_LEN);
1452 ret = -EINVAL;
1453 break;
1454 }
1455 break;
1456 case Opt_initiator_sid:
1457 isid = match_strdup(&args[0]);
6d180253
JJ		 1458 if (!isid) {
1459 ret = -ENOMEM;
1460 goto out;
1461 }
60d645a4 1462 if (strlen(isid) >= PR_REG_ISID_LEN) {
6708bb27 1463 pr_err("APTPL metadata initiator_isid"
c66ac9db
NB		 1464 "= exceeds PR_REG_ISID_LEN: %d\n",
1465 PR_REG_ISID_LEN);
1466 ret = -EINVAL;
1467 break;
1468 }
1469 break;
1470 case Opt_sa_res_key:
1471 arg_p = match_strdup(&args[0]);
6d180253
JJ		 1472 if (!arg_p) {
1473 ret = -ENOMEM;
1474 goto out;
1475 }
c66ac9db
NB		 1476 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1477 if (ret < 0) {
6708bb27 1478 pr_err("strict_strtoull() failed for"
c66ac9db
NB		 1479 " sa_res_key=\n");
1480 goto out;
1481 }
1482 sa_res_key = (u64)tmp_ll;
1483 break;
1484 /*
1485 * PR APTPL Metadata for Reservation
1486 */
1487 case Opt_res_holder:
1488 match_int(args, &arg);
1489 res_holder = arg;
1490 break;
1491 case Opt_res_type:
1492 match_int(args, &arg);
1493 type = (u8)arg;
1494 break;
1495 case Opt_res_scope:
1496 match_int(args, &arg);
1497 scope = (u8)arg;
1498 break;
1499 case Opt_res_all_tg_pt:
1500 match_int(args, &arg);
1501 all_tg_pt = (int)arg;
1502 break;
1503 case Opt_mapped_lun:
1504 match_int(args, &arg);
1505 mapped_lun = (u32)arg;
1506 break;
1507 /*
1508 * PR APTPL Metadata for Target Port
1509 */
1510 case Opt_target_fabric:
1511 t_fabric = match_strdup(&args[0]);
6d180253
JJ		 1512 if (!t_fabric) {
1513 ret = -ENOMEM;
1514 goto out;
1515 }
c66ac9db
NB		 1516 break;
1517 case Opt_target_node:
1518 t_port = match_strdup(&args[0]);
6d180253
JJ		 1519 if (!t_port) {
1520 ret = -ENOMEM;
1521 goto out;
1522 }
60d645a4 1523 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
6708bb27 1524 pr_err("APTPL metadata target_node="
c66ac9db
NB		 1525 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1526 PR_APTPL_MAX_TPORT_LEN);
1527 ret = -EINVAL;
1528 break;
1529 }
1530 break;
1531 case Opt_tpgt:
1532 match_int(args, &arg);
1533 tpgt = (u16)arg;
1534 break;
1535 case Opt_port_rtpi:
1536 match_int(args, &arg);
1537 port_rpti = (u16)arg;
1538 break;
1539 case Opt_target_lun:
1540 match_int(args, &arg);
1541 target_lun = (u32)arg;
1542 break;
1543 default:
1544 break;
1545 }
1546 }
1547
6708bb27
AG		 1548 if (!i_port || !t_port || !sa_res_key) {
1549 pr_err("Illegal parameters for APTPL registration\n");
c66ac9db
NB		 1550 ret = -EINVAL;
1551 goto out;
1552 }
1553
1554 if (res_holder && !(type)) {
6708bb27 1555 pr_err("Illegal PR type: 0x%02x for reservation"
c66ac9db
NB		 1556 " holder\n", type);
1557 ret = -EINVAL;
1558 goto out;
1559 }
1560
e3d6f909 1561 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
c66ac9db
NB		 1562 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1563 res_holder, all_tg_pt, type);
1564out:
6d180253
JJ		 1565 kfree(i_fabric);
1566 kfree(i_port);
1567 kfree(isid);
1568 kfree(t_fabric);
1569 kfree(t_port);
c66ac9db
NB		 1570 kfree(orig);
1571 return (ret == 0) ? count : ret;
1572}
1573
1574SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1575
1576CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1577
1578static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1579 &target_core_dev_pr_res_holder.attr,
1580 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1581 &target_core_dev_pr_res_pr_generation.attr,
1582 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1583 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1584 &target_core_dev_pr_res_pr_type.attr,
1585 &target_core_dev_pr_res_type.attr,
1586 &target_core_dev_pr_res_aptpl_active.attr,
1587 &target_core_dev_pr_res_aptpl_metadata.attr,
1588 NULL,
1589};
1590
1591static struct configfs_item_operations target_core_dev_pr_ops = {
1592 .show_attribute = target_core_dev_pr_attr_show,
1593 .store_attribute = target_core_dev_pr_attr_store,
1594};
1595
1596static struct config_item_type target_core_dev_pr_cit = {
1597 .ct_item_ops = &target_core_dev_pr_ops,
1598 .ct_attrs = target_core_dev_pr_attrs,
1599 .ct_owner = THIS_MODULE,
1600};
1601
1602/* End functions for struct config_item_type target_core_dev_pr_cit */
1603
1604/* Start functions for struct config_item_type target_core_dev_cit */
1605
1606static ssize_t target_core_show_dev_info(void *p, char *page)
1607{
8359cf43 1608 struct se_subsystem_dev *se_dev = p;
c66ac9db
NB		 1609 struct se_hba *hba = se_dev->se_dev_hba;
1610 struct se_subsystem_api *t = hba->transport;
1611 int bl = 0;
1612 ssize_t read_bytes = 0;
1613
6708bb27 1614 if (!se_dev->se_dev_ptr)
c66ac9db
NB		 1615 return -ENODEV;
1616
1617 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1618 read_bytes += bl;
1619 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1620 return read_bytes;
1621}
1622
1623static struct target_core_configfs_attribute target_core_attr_dev_info = {
1624 .attr = { .ca_owner = THIS_MODULE,
1625 .ca_name = "info",
1626 .ca_mode = S_IRUGO },
1627 .show = target_core_show_dev_info,
1628 .store = NULL,
1629};
1630
1631static ssize_t target_core_store_dev_control(
1632 void *p,
1633 const char *page,
1634 size_t count)
1635{
8359cf43 1636 struct se_subsystem_dev *se_dev = p;
c66ac9db
NB		 1637 struct se_hba *hba = se_dev->se_dev_hba;
1638 struct se_subsystem_api *t = hba->transport;
1639
6708bb27
AG		 1640 if (!se_dev->se_dev_su_ptr) {
1641 pr_err("Unable to locate struct se_subsystem_dev>se"
c66ac9db
NB		 1642 "_dev_su_ptr\n");
1643 return -EINVAL;
1644 }
1645
1646 return t->set_configfs_dev_params(hba, se_dev, page, count);
1647}
1648
1649static struct target_core_configfs_attribute target_core_attr_dev_control = {
1650 .attr = { .ca_owner = THIS_MODULE,
1651 .ca_name = "control",
1652 .ca_mode = S_IWUSR },
1653 .show = NULL,
1654 .store = target_core_store_dev_control,
1655};
1656
1657static ssize_t target_core_show_dev_alias(void *p, char *page)
1658{
8359cf43 1659 struct se_subsystem_dev *se_dev = p;
c66ac9db
NB		 1660
1661 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1662 return 0;
1663
1664 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1665}
1666
1667static ssize_t target_core_store_dev_alias(
1668 void *p,
1669 const char *page,
1670 size_t count)
1671{
8359cf43 1672 struct se_subsystem_dev *se_dev = p;
c66ac9db
NB		 1673 struct se_hba *hba = se_dev->se_dev_hba;
1674 ssize_t read_bytes;
1675
1676 if (count > (SE_DEV_ALIAS_LEN-1)) {
6708bb27 1677 pr_err("alias count: %d exceeds"
c66ac9db
NB		 1678 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1679 SE_DEV_ALIAS_LEN-1);
1680 return -EINVAL;
1681 }
1682
c66ac9db
NB		 1683 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1684 "%s", page);
3011684c
DC		 1685 if (!read_bytes)
1686 return -EINVAL;
0877eafd
SAS		 1687 if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
1688 se_dev->se_dev_alias[read_bytes - 1] = '\0';
1689
3011684c
DC		 1690 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1691
6708bb27 1692 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
c66ac9db
NB		 1693 config_item_name(&hba->hba_group.cg_item),
1694 config_item_name(&se_dev->se_dev_group.cg_item),
1695 se_dev->se_dev_alias);
1696
1697 return read_bytes;
1698}
1699
1700static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1701 .attr = { .ca_owner = THIS_MODULE,
1702 .ca_name = "alias",
1703 .ca_mode = S_IRUGO | S_IWUSR },
1704 .show = target_core_show_dev_alias,
1705 .store = target_core_store_dev_alias,
1706};
1707
1708static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1709{
8359cf43 1710 struct se_subsystem_dev *se_dev = p;
c66ac9db
NB		 1711
1712 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1713 return 0;
1714
1715 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1716}
1717
1718static ssize_t target_core_store_dev_udev_path(
1719 void *p,
1720 const char *page,
1721 size_t count)
1722{
8359cf43 1723 struct se_subsystem_dev *se_dev = p;
c66ac9db
NB		 1724 struct se_hba *hba = se_dev->se_dev_hba;
1725 ssize_t read_bytes;
1726
1727 if (count > (SE_UDEV_PATH_LEN-1)) {
6708bb27 1728 pr_err("udev_path count: %d exceeds"
c66ac9db
NB		 1729 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1730 SE_UDEV_PATH_LEN-1);
1731 return -EINVAL;
1732 }
1733
c66ac9db
NB		 1734 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1735 "%s", page);
3011684c
DC		 1736 if (!read_bytes)
1737 return -EINVAL;
0877eafd
SAS		 1738 if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
1739 se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
1740
3011684c
DC		 1741 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1742
6708bb27 1743 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
c66ac9db
NB		 1744 config_item_name(&hba->hba_group.cg_item),
1745 config_item_name(&se_dev->se_dev_group.cg_item),
1746 se_dev->se_dev_udev_path);
1747
1748 return read_bytes;
1749}
1750
1751static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1752 .attr = { .ca_owner = THIS_MODULE,
1753 .ca_name = "udev_path",
1754 .ca_mode = S_IRUGO | S_IWUSR },
1755 .show = target_core_show_dev_udev_path,
1756 .store = target_core_store_dev_udev_path,
1757};
1758
1759static ssize_t target_core_store_dev_enable(
1760 void *p,
1761 const char *page,
1762 size_t count)
1763{
8359cf43 1764 struct se_subsystem_dev *se_dev = p;
c66ac9db
NB		 1765 struct se_device *dev;
1766 struct se_hba *hba = se_dev->se_dev_hba;
1767 struct se_subsystem_api *t = hba->transport;
1768 char *ptr;
1769
1770 ptr = strstr(page, "1");
6708bb27
AG		 1771 if (!ptr) {
1772 pr_err("For dev_enable ops, only valid value"
c66ac9db
NB		 1773 " is \"1\"\n");
1774 return -EINVAL;
1775 }
6708bb27
AG		 1776 if (se_dev->se_dev_ptr) {
1777 pr_err("se_dev->se_dev_ptr already set for storage"
c66ac9db
NB		 1778 " object\n");
1779 return -EEXIST;
1780 }
1781
1782 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1783 return -EINVAL;
1784
1785 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
613640e4
NB		 1786 if (IS_ERR(dev))
1787 return PTR_ERR(dev);
1788 else if (!dev)
c66ac9db
NB		 1789 return -EINVAL;
1790
1791 se_dev->se_dev_ptr = dev;
6708bb27 1792 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
c66ac9db
NB		 1793 " %p\n", se_dev->se_dev_ptr);
1794
1795 return count;
1796}
1797
1798static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1799 .attr = { .ca_owner = THIS_MODULE,
1800 .ca_name = "enable",
1801 .ca_mode = S_IWUSR },
1802 .show = NULL,
1803 .store = target_core_store_dev_enable,
1804};
1805
1806static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1807{
1808 struct se_device *dev;
8359cf43 1809 struct se_subsystem_dev *su_dev = p;
c66ac9db
NB		 1810 struct config_item *lu_ci;
1811 struct t10_alua_lu_gp *lu_gp;
1812 struct t10_alua_lu_gp_member *lu_gp_mem;
1813 ssize_t len = 0;
1814
1815 dev = su_dev->se_dev_ptr;
6708bb27 1816 if (!dev)
c66ac9db
NB		 1817 return -ENODEV;
1818
e3d6f909 1819 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
c66ac9db
NB		 1820 return len;
1821
1822 lu_gp_mem = dev->dev_alua_lu_gp_mem;
6708bb27
AG		 1823 if (!lu_gp_mem) {
1824 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
c66ac9db
NB		 1825 " pointer\n");
1826 return -EINVAL;
1827 }
1828
1829 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1830 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1831 if (lu_gp) {
c66ac9db
NB		 1832 lu_ci = &lu_gp->lu_gp_group.cg_item;
1833 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1834 config_item_name(lu_ci), lu_gp->lu_gp_id);
1835 }
1836 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1837
1838 return len;
1839}
1840
1841static ssize_t target_core_store_alua_lu_gp(
1842 void *p,
1843 const char *page,
1844 size_t count)
1845{
1846 struct se_device *dev;
8359cf43 1847 struct se_subsystem_dev *su_dev = p;
c66ac9db
NB		 1848 struct se_hba *hba = su_dev->se_dev_hba;
1849 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1850 struct t10_alua_lu_gp_member *lu_gp_mem;
1851 unsigned char buf[LU_GROUP_NAME_BUF];
1852 int move = 0;
1853
1854 dev = su_dev->se_dev_ptr;
6708bb27 1855 if (!dev)
c66ac9db
NB		 1856 return -ENODEV;
1857
e3d6f909 1858 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
6708bb27 1859 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
c66ac9db
NB		 1860 config_item_name(&hba->hba_group.cg_item),
1861 config_item_name(&su_dev->se_dev_group.cg_item));
1862 return -EINVAL;
1863 }
1864 if (count > LU_GROUP_NAME_BUF) {
6708bb27 1865 pr_err("ALUA LU Group Alias too large!\n");
c66ac9db
NB		 1866 return -EINVAL;
1867 }
1868 memset(buf, 0, LU_GROUP_NAME_BUF);
1869 memcpy(buf, page, count);
1870 /*
1871 * Any ALUA logical unit alias besides "NULL" means we will be
1872 * making a new group association.
1873 */
1874 if (strcmp(strstrip(buf), "NULL")) {
1875 /*
1876 * core_alua_get_lu_gp_by_name() will increment reference to
1877 * struct t10_alua_lu_gp. This reference is released with
1878 * core_alua_get_lu_gp_by_name below().
1879 */
1880 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
6708bb27 1881 if (!lu_gp_new)
c66ac9db
NB		 1882 return -ENODEV;
1883 }
1884 lu_gp_mem = dev->dev_alua_lu_gp_mem;
6708bb27 1885 if (!lu_gp_mem) {
c66ac9db
NB		 1886 if (lu_gp_new)
1887 core_alua_put_lu_gp_from_name(lu_gp_new);
6708bb27 1888 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
c66ac9db
NB		 1889 " pointer\n");
1890 return -EINVAL;
1891 }
1892
1893 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1894 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1895 if (lu_gp) {
c66ac9db
NB		 1896 /*
1897 * Clearing an existing lu_gp association, and replacing
1898 * with NULL
1899 */
6708bb27
AG		 1900 if (!lu_gp_new) {
1901 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
c66ac9db
NB		 1902 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1903 " %hu\n",
1904 config_item_name(&hba->hba_group.cg_item),
1905 config_item_name(&su_dev->se_dev_group.cg_item),
1906 config_item_name(&lu_gp->lu_gp_group.cg_item),
1907 lu_gp->lu_gp_id);
1908
1909 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1910 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1911
1912 return count;
1913 }
1914 /*
1915 * Removing existing association of lu_gp_mem with lu_gp
1916 */
1917 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1918 move = 1;
1919 }
1920 /*
1921 * Associate lu_gp_mem with lu_gp_new.
1922 */
1923 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1924 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1925
6708bb27 1926 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
c66ac9db
NB		 1927 " core/alua/lu_gps/%s, ID: %hu\n",
1928 (move) ? "Moving" : "Adding",
1929 config_item_name(&hba->hba_group.cg_item),
1930 config_item_name(&su_dev->se_dev_group.cg_item),
1931 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1932 lu_gp_new->lu_gp_id);
1933
1934 core_alua_put_lu_gp_from_name(lu_gp_new);
1935 return count;
1936}
1937
1938static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1939 .attr = { .ca_owner = THIS_MODULE,
1940 .ca_name = "alua_lu_gp",
1941 .ca_mode = S_IRUGO | S_IWUSR },
1942 .show = target_core_show_alua_lu_gp,
1943 .store = target_core_store_alua_lu_gp,
1944};
1945
1946static struct configfs_attribute *lio_core_dev_attrs[] = {
1947 &target_core_attr_dev_info.attr,
1948 &target_core_attr_dev_control.attr,
1949 &target_core_attr_dev_alias.attr,
1950 &target_core_attr_dev_udev_path.attr,
1951 &target_core_attr_dev_enable.attr,
1952 &target_core_attr_dev_alua_lu_gp.attr,
1953 NULL,
1954};
1955
1956static void target_core_dev_release(struct config_item *item)
1957{
1958 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1959 struct se_subsystem_dev, se_dev_group);
1f6fe7cb
NB		 1960 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1961 struct se_subsystem_api *t = hba->transport;
1962 struct config_group *dev_cg = &se_dev->se_dev_group;
c66ac9db 1963
c66ac9db 1964 kfree(dev_cg->default_groups);
1f6fe7cb
NB		 1965 /*
1966 * This pointer will set when the storage is enabled with:
1967 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1968 */
1969 if (se_dev->se_dev_ptr) {
6708bb27 1970 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1f6fe7cb
NB		 1971 "virtual_device() for se_dev_ptr: %p\n",
1972 se_dev->se_dev_ptr);
1973
1974 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1975 } else {
1976 /*
1977 * Release struct se_subsystem_dev->se_dev_su_ptr..
1978 */
6708bb27 1979 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1f6fe7cb
NB		 1980 "device() for se_dev_su_ptr: %p\n",
1981 se_dev->se_dev_su_ptr);
1982
1983 t->free_device(se_dev->se_dev_su_ptr);
1984 }
1985
6708bb27 1986 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
1f6fe7cb
NB		 1987 "_dev_t: %p\n", se_dev);
1988 kfree(se_dev);
c66ac9db
NB		 1989}
1990
1991static ssize_t target_core_dev_show(struct config_item *item,
1992 struct configfs_attribute *attr,
1993 char *page)
1994{
1995 struct se_subsystem_dev *se_dev = container_of(
1996 to_config_group(item), struct se_subsystem_dev,
1997 se_dev_group);
1998 struct target_core_configfs_attribute *tc_attr = container_of(
1999 attr, struct target_core_configfs_attribute, attr);
2000
6708bb27 2001 if (!tc_attr->show)
c66ac9db
NB		 2002 return -EINVAL;
2003
5951146d 2004 return tc_attr->show(se_dev, page);
c66ac9db
NB		 2005}
2006
2007static ssize_t target_core_dev_store(struct config_item *item,
2008 struct configfs_attribute *attr,
2009 const char *page, size_t count)
2010{
2011 struct se_subsystem_dev *se_dev = container_of(
2012 to_config_group(item), struct se_subsystem_dev,
2013 se_dev_group);
2014 struct target_core_configfs_attribute *tc_attr = container_of(
2015 attr, struct target_core_configfs_attribute, attr);
2016
6708bb27 2017 if (!tc_attr->store)
c66ac9db
NB		 2018 return -EINVAL;
2019
5951146d 2020 return tc_attr->store(se_dev, page, count);
c66ac9db
NB		 2021}
2022
2023static struct configfs_item_operations target_core_dev_item_ops = {
2024 .release = target_core_dev_release,
2025 .show_attribute = target_core_dev_show,
2026 .store_attribute = target_core_dev_store,
2027};
2028
2029static struct config_item_type target_core_dev_cit = {
2030 .ct_item_ops = &target_core_dev_item_ops,
2031 .ct_attrs = lio_core_dev_attrs,
2032 .ct_owner = THIS_MODULE,
2033};
2034
2035/* End functions for struct config_item_type target_core_dev_cit */
2036
2037/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2038
2039CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2040#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2041static struct target_core_alua_lu_gp_attribute \
2042 target_core_alua_lu_gp_##_name = \
2043 __CONFIGFS_EATTR(_name, _mode, \
2044 target_core_alua_lu_gp_show_attr_##_name, \
2045 target_core_alua_lu_gp_store_attr_##_name);
2046
2047#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2048static struct target_core_alua_lu_gp_attribute \
2049 target_core_alua_lu_gp_##_name = \
2050 __CONFIGFS_EATTR_RO(_name, \
2051 target_core_alua_lu_gp_show_attr_##_name);
2052
2053/*
2054 * lu_gp_id
2055 */
2056static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2057 struct t10_alua_lu_gp *lu_gp,
2058 char *page)
2059{
6708bb27 2060 if (!lu_gp->lu_gp_valid_id)
c66ac9db
NB		 2061 return 0;
2062
2063 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2064}
2065
2066static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2067 struct t10_alua_lu_gp *lu_gp,
2068 const char *page,
2069 size_t count)
2070{
2071 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2072 unsigned long lu_gp_id;
2073 int ret;
2074
2075 ret = strict_strtoul(page, 0, &lu_gp_id);
2076 if (ret < 0) {
6708bb27 2077 pr_err("strict_strtoul() returned %d for"
c66ac9db
NB		 2078 " lu_gp_id\n", ret);
2079 return -EINVAL;
2080 }
2081 if (lu_gp_id > 0x0000ffff) {
6708bb27 2082 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2083 " 0x0000ffff\n", lu_gp_id);
2084 return -EINVAL;
2085 }
2086
2087 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2088 if (ret < 0)
2089 return -EINVAL;
2090
6708bb27 2091 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
c66ac9db
NB		 2092 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2093 config_item_name(&alua_lu_gp_cg->cg_item),
2094 lu_gp->lu_gp_id);
2095
2096 return count;
2097}
2098
2099SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2100
2101/*
2102 * members
2103 */
2104static ssize_t target_core_alua_lu_gp_show_attr_members(
2105 struct t10_alua_lu_gp *lu_gp,
2106 char *page)
2107{
2108 struct se_device *dev;
2109 struct se_hba *hba;
2110 struct se_subsystem_dev *su_dev;
2111 struct t10_alua_lu_gp_member *lu_gp_mem;
2112 ssize_t len = 0, cur_len;
2113 unsigned char buf[LU_GROUP_NAME_BUF];
2114
2115 memset(buf, 0, LU_GROUP_NAME_BUF);
2116
2117 spin_lock(&lu_gp->lu_gp_lock);
2118 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2119 dev = lu_gp_mem->lu_gp_mem_dev;
2120 su_dev = dev->se_sub_dev;
2121 hba = su_dev->se_dev_hba;
2122
2123 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2124 config_item_name(&hba->hba_group.cg_item),
2125 config_item_name(&su_dev->se_dev_group.cg_item));
2126 cur_len++; /* Extra byte for NULL terminator */
2127
2128 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2129 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2130 "_members buffer\n");
2131 break;
2132 }
2133 memcpy(page+len, buf, cur_len);
2134 len += cur_len;
2135 }
2136 spin_unlock(&lu_gp->lu_gp_lock);
2137
2138 return len;
2139}
2140
2141SE_DEV_ALUA_LU_ATTR_RO(members);
2142
2143CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2144
2145static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2146 &target_core_alua_lu_gp_lu_gp_id.attr,
2147 &target_core_alua_lu_gp_members.attr,
2148 NULL,
2149};
2150
1f6fe7cb
NB		 2151static void target_core_alua_lu_gp_release(struct config_item *item)
2152{
2153 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2154 struct t10_alua_lu_gp, lu_gp_group);
2155
2156 core_alua_free_lu_gp(lu_gp);
2157}
2158
c66ac9db 2159static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1f6fe7cb 2160 .release = target_core_alua_lu_gp_release,
c66ac9db
NB		 2161 .show_attribute = target_core_alua_lu_gp_attr_show,
2162 .store_attribute = target_core_alua_lu_gp_attr_store,
2163};
2164
2165static struct config_item_type target_core_alua_lu_gp_cit = {
2166 .ct_item_ops = &target_core_alua_lu_gp_ops,
2167 .ct_attrs = target_core_alua_lu_gp_attrs,
2168 .ct_owner = THIS_MODULE,
2169};
2170
2171/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2172
2173/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2174
2175static struct config_group *target_core_alua_create_lu_gp(
2176 struct config_group *group,
2177 const char *name)
2178{
2179 struct t10_alua_lu_gp *lu_gp;
2180 struct config_group *alua_lu_gp_cg = NULL;
2181 struct config_item *alua_lu_gp_ci = NULL;
2182
2183 lu_gp = core_alua_allocate_lu_gp(name, 0);
2184 if (IS_ERR(lu_gp))
2185 return NULL;
2186
2187 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2188 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2189
2190 config_group_init_type_name(alua_lu_gp_cg, name,
2191 &target_core_alua_lu_gp_cit);
2192
6708bb27 2193 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
c66ac9db
NB		 2194 " Group: core/alua/lu_gps/%s\n",
2195 config_item_name(alua_lu_gp_ci));
2196
2197 return alua_lu_gp_cg;
2198
2199}
2200
2201static void target_core_alua_drop_lu_gp(
2202 struct config_group *group,
2203 struct config_item *item)
2204{
2205 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2206 struct t10_alua_lu_gp, lu_gp_group);
2207
6708bb27 2208 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
c66ac9db
NB		 2209 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2210 config_item_name(item), lu_gp->lu_gp_id);
1f6fe7cb
NB		 2211 /*
2212 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2213 * -> target_core_alua_lu_gp_release()
2214 */
c66ac9db 2215 config_item_put(item);
c66ac9db
NB		 2216}
2217
2218static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2219 .make_group = &target_core_alua_create_lu_gp,
2220 .drop_item = &target_core_alua_drop_lu_gp,
2221};
2222
2223static struct config_item_type target_core_alua_lu_gps_cit = {
2224 .ct_item_ops = NULL,
2225 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2226 .ct_owner = THIS_MODULE,
2227};
2228
2229/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2230
2231/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2232
2233CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2234#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2235static struct target_core_alua_tg_pt_gp_attribute \
2236 target_core_alua_tg_pt_gp_##_name = \
2237 __CONFIGFS_EATTR(_name, _mode, \
2238 target_core_alua_tg_pt_gp_show_attr_##_name, \
2239 target_core_alua_tg_pt_gp_store_attr_##_name);
2240
2241#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2242static struct target_core_alua_tg_pt_gp_attribute \
2243 target_core_alua_tg_pt_gp_##_name = \
2244 __CONFIGFS_EATTR_RO(_name, \
2245 target_core_alua_tg_pt_gp_show_attr_##_name);
2246
2247/*
2248 * alua_access_state
2249 */
2250static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2251 struct t10_alua_tg_pt_gp *tg_pt_gp,
2252 char *page)
2253{
2254 return sprintf(page, "%d\n",
2255 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2256}
2257
2258static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2259 struct t10_alua_tg_pt_gp *tg_pt_gp,
2260 const char *page,
2261 size_t count)
2262{
2263 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2264 unsigned long tmp;
2265 int new_state, ret;
2266
6708bb27
AG		 2267 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2268 pr_err("Unable to do implict ALUA on non valid"
c66ac9db
NB		 2269 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2270 return -EINVAL;
2271 }
2272
2273 ret = strict_strtoul(page, 0, &tmp);
2274 if (ret < 0) {
6708bb27 2275 pr_err("Unable to extract new ALUA access state from"
c66ac9db
NB		 2276 " %s\n", page);
2277 return -EINVAL;
2278 }
2279 new_state = (int)tmp;
2280
2281 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
6708bb27 2282 pr_err("Unable to process implict configfs ALUA"
5e58b029 2283 " transition while TPGS_IMPLICT_ALUA is disabled\n");
c66ac9db
NB		 2284 return -EINVAL;
2285 }
2286
2287 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2288 NULL, NULL, new_state, 0);
2289 return (!ret) ? count : -EINVAL;
2290}
2291
2292SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2293
2294/*
2295 * alua_access_status
2296 */
2297static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2298 struct t10_alua_tg_pt_gp *tg_pt_gp,
2299 char *page)
2300{
2301 return sprintf(page, "%s\n",
2302 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2303}
2304
2305static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2306 struct t10_alua_tg_pt_gp *tg_pt_gp,
2307 const char *page,
2308 size_t count)
2309{
2310 unsigned long tmp;
2311 int new_status, ret;
2312
6708bb27
AG		 2313 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2314 pr_err("Unable to do set ALUA access status on non"
c66ac9db
NB		 2315 " valid tg_pt_gp ID: %hu\n",
2316 tg_pt_gp->tg_pt_gp_valid_id);
2317 return -EINVAL;
2318 }
2319
2320 ret = strict_strtoul(page, 0, &tmp);
2321 if (ret < 0) {
6708bb27 2322 pr_err("Unable to extract new ALUA access status"
c66ac9db
NB		 2323 " from %s\n", page);
2324 return -EINVAL;
2325 }
2326 new_status = (int)tmp;
2327
2328 if ((new_status != ALUA_STATUS_NONE) &&
2329 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2330 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
6708bb27 2331 pr_err("Illegal ALUA access status: 0x%02x\n",
c66ac9db
NB		 2332 new_status);
2333 return -EINVAL;
2334 }
2335
2336 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2337 return count;
2338}
2339
2340SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2341
2342/*
2343 * alua_access_type
2344 */
2345static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2346 struct t10_alua_tg_pt_gp *tg_pt_gp,
2347 char *page)
2348{
2349 return core_alua_show_access_type(tg_pt_gp, page);
2350}
2351
2352static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2353 struct t10_alua_tg_pt_gp *tg_pt_gp,
2354 const char *page,
2355 size_t count)
2356{
2357 return core_alua_store_access_type(tg_pt_gp, page, count);
2358}
2359
2360SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2361
2362/*
2363 * alua_write_metadata
2364 */
2365static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2366 struct t10_alua_tg_pt_gp *tg_pt_gp,
2367 char *page)
2368{
2369 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2370}
2371
2372static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2373 struct t10_alua_tg_pt_gp *tg_pt_gp,
2374 const char *page,
2375 size_t count)
2376{
2377 unsigned long tmp;
2378 int ret;
2379
2380 ret = strict_strtoul(page, 0, &tmp);
2381 if (ret < 0) {
6708bb27 2382 pr_err("Unable to extract alua_write_metadata\n");
c66ac9db
NB		 2383 return -EINVAL;
2384 }
2385
2386 if ((tmp != 0) && (tmp != 1)) {
6708bb27 2387 pr_err("Illegal value for alua_write_metadata:"
c66ac9db
NB		 2388 " %lu\n", tmp);
2389 return -EINVAL;
2390 }
2391 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2392
2393 return count;
2394}
2395
2396SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2397
2398
2399
2400/*
2401 * nonop_delay_msecs
2402 */
2403static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2404 struct t10_alua_tg_pt_gp *tg_pt_gp,
2405 char *page)
2406{
2407 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2408
2409}
2410
2411static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2412 struct t10_alua_tg_pt_gp *tg_pt_gp,
2413 const char *page,
2414 size_t count)
2415{
2416 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2417}
2418
2419SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2420
2421/*
2422 * trans_delay_msecs
2423 */
2424static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2425 struct t10_alua_tg_pt_gp *tg_pt_gp,
2426 char *page)
2427{
2428 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2429}
2430
2431static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2432 struct t10_alua_tg_pt_gp *tg_pt_gp,
2433 const char *page,
2434 size_t count)
2435{
2436 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2437}
2438
2439SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2440
5b9a4d72
NB		 2441/*
2442 * implict_trans_secs
2443 */
2444static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2445 struct t10_alua_tg_pt_gp *tg_pt_gp,
2446 char *page)
2447{
2448 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2449}
2450
2451static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2452 struct t10_alua_tg_pt_gp *tg_pt_gp,
2453 const char *page,
2454 size_t count)
2455{
2456 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2457}
2458
2459SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2460
c66ac9db
NB		 2461/*
2462 * preferred
2463 */
2464
2465static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2466 struct t10_alua_tg_pt_gp *tg_pt_gp,
2467 char *page)
2468{
2469 return core_alua_show_preferred_bit(tg_pt_gp, page);
2470}
2471
2472static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2473 struct t10_alua_tg_pt_gp *tg_pt_gp,
2474 const char *page,
2475 size_t count)
2476{
2477 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2478}
2479
2480SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2481
2482/*
2483 * tg_pt_gp_id
2484 */
2485static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2486 struct t10_alua_tg_pt_gp *tg_pt_gp,
2487 char *page)
2488{
6708bb27 2489 if (!tg_pt_gp->tg_pt_gp_valid_id)
c66ac9db
NB		 2490 return 0;
2491
2492 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2493}
2494
2495static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2496 struct t10_alua_tg_pt_gp *tg_pt_gp,
2497 const char *page,
2498 size_t count)
2499{
2500 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2501 unsigned long tg_pt_gp_id;
2502 int ret;
2503
2504 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2505 if (ret < 0) {
6708bb27 2506 pr_err("strict_strtoul() returned %d for"
c66ac9db
NB		 2507 " tg_pt_gp_id\n", ret);
2508 return -EINVAL;
2509 }
2510 if (tg_pt_gp_id > 0x0000ffff) {
6708bb27 2511 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2512 " 0x0000ffff\n", tg_pt_gp_id);
2513 return -EINVAL;
2514 }
2515
2516 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2517 if (ret < 0)
2518 return -EINVAL;
2519
6708bb27 2520 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
c66ac9db
NB		 2521 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2522 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2523 tg_pt_gp->tg_pt_gp_id);
2524
2525 return count;
2526}
2527
2528SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2529
2530/*
2531 * members
2532 */
2533static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2534 struct t10_alua_tg_pt_gp *tg_pt_gp,
2535 char *page)
2536{
2537 struct se_port *port;
2538 struct se_portal_group *tpg;
2539 struct se_lun *lun;
2540 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2541 ssize_t len = 0, cur_len;
2542 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2543
2544 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2545
2546 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2547 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2548 tg_pt_gp_mem_list) {
2549 port = tg_pt_gp_mem->tg_pt;
2550 tpg = port->sep_tpg;
2551 lun = port->sep_lun;
2552
2553 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
e3d6f909
AG		 2554 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2555 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2556 tpg->se_tpg_tfo->tpg_get_tag(tpg),
c66ac9db
NB		 2557 config_item_name(&lun->lun_group.cg_item));
2558 cur_len++; /* Extra byte for NULL terminator */
2559
2560 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2561 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2562 "_members buffer\n");
2563 break;
2564 }
2565 memcpy(page+len, buf, cur_len);
2566 len += cur_len;
2567 }
2568 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2569
2570 return len;
2571}
2572
2573SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2574
2575CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2576 tg_pt_gp_group);
2577
2578static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2579 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2580 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2581 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2582 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2583 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2584 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
5b9a4d72 2585 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
c66ac9db
NB		 2586 &target_core_alua_tg_pt_gp_preferred.attr,
2587 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2588 &target_core_alua_tg_pt_gp_members.attr,
2589 NULL,
2590};
2591
1f6fe7cb
NB		 2592static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2593{
2594 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2595 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2596
2597 core_alua_free_tg_pt_gp(tg_pt_gp);
2598}
2599
c66ac9db 2600static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
1f6fe7cb 2601 .release = target_core_alua_tg_pt_gp_release,
c66ac9db
NB		 2602 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2603 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2604};
2605
2606static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2607 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2608 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2609 .ct_owner = THIS_MODULE,
2610};
2611
2612/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2613
2614/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2615
2616static struct config_group *target_core_alua_create_tg_pt_gp(
2617 struct config_group *group,
2618 const char *name)
2619{
2620 struct t10_alua *alua = container_of(group, struct t10_alua,
2621 alua_tg_pt_gps_group);
2622 struct t10_alua_tg_pt_gp *tg_pt_gp;
2623 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2624 struct config_group *alua_tg_pt_gp_cg = NULL;
2625 struct config_item *alua_tg_pt_gp_ci = NULL;
2626
2627 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
6708bb27 2628 if (!tg_pt_gp)
c66ac9db
NB		 2629 return NULL;
2630
2631 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2632 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2633
2634 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2635 &target_core_alua_tg_pt_gp_cit);
2636
6708bb27 2637 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
c66ac9db
NB		 2638 " Group: alua/tg_pt_gps/%s\n",
2639 config_item_name(alua_tg_pt_gp_ci));
2640
2641 return alua_tg_pt_gp_cg;
2642}
2643
2644static void target_core_alua_drop_tg_pt_gp(
2645 struct config_group *group,
2646 struct config_item *item)
2647{
2648 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2649 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2650
6708bb27 2651 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
c66ac9db
NB		 2652 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2653 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
1f6fe7cb
NB		 2654 /*
2655 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2656 * -> target_core_alua_tg_pt_gp_release().
2657 */
c66ac9db 2658 config_item_put(item);
c66ac9db
NB		 2659}
2660
2661static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2662 .make_group = &target_core_alua_create_tg_pt_gp,
2663 .drop_item = &target_core_alua_drop_tg_pt_gp,
2664};
2665
2666static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2667 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2668 .ct_owner = THIS_MODULE,
2669};
2670
2671/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2672
2673/* Start functions for struct config_item_type target_core_alua_cit */
2674
2675/*
2676 * target_core_alua_cit is a ConfigFS group that lives under
2677 * /sys/kernel/config/target/core/alua. There are default groups
2678 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2679 * target_core_alua_cit in target_core_init_configfs() below.
2680 */
2681static struct config_item_type target_core_alua_cit = {
2682 .ct_item_ops = NULL,
2683 .ct_attrs = NULL,
2684 .ct_owner = THIS_MODULE,
2685};
2686
2687/* End functions for struct config_item_type target_core_alua_cit */
2688
12d23384
NB		 2689/* Start functions for struct config_item_type target_core_stat_cit */
2690
2691static struct config_group *target_core_stat_mkdir(
2692 struct config_group *group,
2693 const char *name)
2694{
2695 return ERR_PTR(-ENOSYS);
2696}
2697
2698static void target_core_stat_rmdir(
2699 struct config_group *group,
2700 struct config_item *item)
2701{
2702 return;
2703}
2704
2705static struct configfs_group_operations target_core_stat_group_ops = {
2706 .make_group = &target_core_stat_mkdir,
2707 .drop_item = &target_core_stat_rmdir,
2708};
2709
2710static struct config_item_type target_core_stat_cit = {
2711 .ct_group_ops = &target_core_stat_group_ops,
2712 .ct_owner = THIS_MODULE,
2713};
2714
2715/* End functions for struct config_item_type target_core_stat_cit */
2716
c66ac9db
NB		 2717/* Start functions for struct config_item_type target_core_hba_cit */
2718
2719static struct config_group *target_core_make_subdev(
2720 struct config_group *group,
2721 const char *name)
2722{
2723 struct t10_alua_tg_pt_gp *tg_pt_gp;
2724 struct se_subsystem_dev *se_dev;
2725 struct se_subsystem_api *t;
2726 struct config_item *hba_ci = &group->cg_item;
2727 struct se_hba *hba = item_to_hba(hba_ci);
2728 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
12d23384
NB		 2729 struct config_group *dev_stat_grp = NULL;
2730 int errno = -ENOMEM, ret;
c66ac9db 2731
12d23384
NB		 2732 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2733 if (ret)
2734 return ERR_PTR(ret);
c66ac9db
NB		 2735 /*
2736 * Locate the struct se_subsystem_api from parent's struct se_hba.
2737 */
2738 t = hba->transport;
2739
2740 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2741 if (!se_dev) {
6708bb27 2742 pr_err("Unable to allocate memory for"
c66ac9db
NB		 2743 " struct se_subsystem_dev\n");
2744 goto unlock;
2745 }
c66ac9db
NB		 2746 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2747 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
e3d6f909
AG		 2748 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2749 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2750 spin_lock_init(&se_dev->t10_pr.registration_lock);
2751 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
c66ac9db
NB		 2752 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2753 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2754 spin_lock_init(&se_dev->se_dev_lock);
e3d6f909 2755 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
c66ac9db
NB		 2756 se_dev->t10_wwn.t10_sub_dev = se_dev;
2757 se_dev->t10_alua.t10_sub_dev = se_dev;
2758 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2759
2760 se_dev->se_dev_hba = hba;
2761 dev_cg = &se_dev->se_dev_group;
2762
12d23384 2763 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
c66ac9db 2764 GFP_KERNEL);
6708bb27 2765 if (!dev_cg->default_groups)
c66ac9db
NB		 2766 goto out;
2767 /*
2768 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2769 * for ->allocate_virtdevice()
2770 *
2771 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2772 * has been called successfully in the next level up in the
2773 * configfs tree for device object's struct config_group.
2774 */
2775 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
6708bb27
AG		 2776 if (!se_dev->se_dev_su_ptr) {
2777 pr_err("Unable to locate subsystem dependent pointer"
c66ac9db
NB		 2778 " from allocate_virtdevice()\n");
2779 goto out;
2780 }
c66ac9db
NB		 2781
2782 config_group_init_type_name(&se_dev->se_dev_group, name,
2783 &target_core_dev_cit);
2784 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2785 &target_core_dev_attrib_cit);
2786 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2787 &target_core_dev_pr_cit);
2788 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2789 &target_core_dev_wwn_cit);
2790 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2791 "alua", &target_core_alua_tg_pt_gps_cit);
12d23384
NB		 2792 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2793 "statistics", &target_core_stat_cit);
2794
c66ac9db
NB		 2795 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2796 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2797 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2798 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
12d23384
NB		 2799 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2800 dev_cg->default_groups[5] = NULL;
c66ac9db 2801 /*
12d23384 2802 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
c66ac9db
NB		 2803 */
2804 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
6708bb27 2805 if (!tg_pt_gp)
c66ac9db
NB		 2806 goto out;
2807
e3d6f909 2808 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2809 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2810 GFP_KERNEL);
6708bb27
AG		 2811 if (!tg_pt_gp_cg->default_groups) {
2812 pr_err("Unable to allocate tg_pt_gp_cg->"
c66ac9db
NB		 2813 "default_groups\n");
2814 goto out;
2815 }
2816
2817 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2818 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2819 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2820 tg_pt_gp_cg->default_groups[1] = NULL;
e3d6f909 2821 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
12d23384
NB		 2822 /*
2823 * Add core/$HBA/$DEV/statistics/ default groups
2824 */
e3d6f909 2825 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
12d23384
NB		 2826 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2827 GFP_KERNEL);
2828 if (!dev_stat_grp->default_groups) {
6708bb27 2829 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
12d23384
NB		 2830 goto out;
2831 }
2832 target_stat_setup_dev_default_groups(se_dev);
c66ac9db 2833
6708bb27 2834 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
c66ac9db
NB		 2835 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2836
2837 mutex_unlock(&hba->hba_access_mutex);
2838 return &se_dev->se_dev_group;
2839out:
e3d6f909
AG		 2840 if (se_dev->t10_alua.default_tg_pt_gp) {
2841 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2842 se_dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db 2843 }
12d23384
NB		 2844 if (dev_stat_grp)
2845 kfree(dev_stat_grp->default_groups);
c66ac9db
NB		 2846 if (tg_pt_gp_cg)
2847 kfree(tg_pt_gp_cg->default_groups);
2848 if (dev_cg)
2849 kfree(dev_cg->default_groups);
2850 if (se_dev->se_dev_su_ptr)
2851 t->free_device(se_dev->se_dev_su_ptr);
2852 kfree(se_dev);
2853unlock:
2854 mutex_unlock(&hba->hba_access_mutex);
12d23384 2855 return ERR_PTR(errno);
c66ac9db
NB		 2856}
2857
2858static void target_core_drop_subdev(
2859 struct config_group *group,
2860 struct config_item *item)
2861{
2862 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2863 struct se_subsystem_dev, se_dev_group);
2864 struct se_hba *hba;
c66ac9db 2865 struct config_item *df_item;
12d23384 2866 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
1f6fe7cb 2867 int i;
c66ac9db
NB		 2868
2869 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2870
1f6fe7cb 2871 mutex_lock(&hba->hba_access_mutex);
c66ac9db 2872
e3d6f909 2873 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
12d23384
NB		 2874 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2875 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2876 dev_stat_grp->default_groups[i] = NULL;
2877 config_item_put(df_item);
2878 }
2879 kfree(dev_stat_grp->default_groups);
2880
e3d6f909 2881 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2882 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2883 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2884 tg_pt_gp_cg->default_groups[i] = NULL;
2885 config_item_put(df_item);
2886 }
2887 kfree(tg_pt_gp_cg->default_groups);
1f6fe7cb
NB		 2888 /*
2889 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2890 * directly from target_core_alua_tg_pt_gp_release().
2891 */
e3d6f909 2892 se_dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db
NB		 2893
2894 dev_cg = &se_dev->se_dev_group;
2895 for (i = 0; dev_cg->default_groups[i]; i++) {
2896 df_item = &dev_cg->default_groups[i]->cg_item;
2897 dev_cg->default_groups[i] = NULL;
2898 config_item_put(df_item);
2899 }
c66ac9db 2900 /*
1f6fe7cb
NB		 2901 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2902 * from target_core_dev_item_ops->release() ->target_core_dev_release().
c66ac9db 2903 */
1f6fe7cb 2904 config_item_put(item);
c66ac9db 2905 mutex_unlock(&hba->hba_access_mutex);
c66ac9db
NB		 2906}
2907
2908static struct configfs_group_operations target_core_hba_group_ops = {
2909 .make_group = target_core_make_subdev,
2910 .drop_item = target_core_drop_subdev,
2911};
2912
2913CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2914#define SE_HBA_ATTR(_name, _mode) \
2915static struct target_core_hba_attribute \
2916 target_core_hba_##_name = \
2917 __CONFIGFS_EATTR(_name, _mode, \
2918 target_core_hba_show_attr_##_name, \
2919 target_core_hba_store_attr_##_name);
2920
2921#define SE_HBA_ATTR_RO(_name) \
2922static struct target_core_hba_attribute \
2923 target_core_hba_##_name = \
2924 __CONFIGFS_EATTR_RO(_name, \
2925 target_core_hba_show_attr_##_name);
2926
2927static ssize_t target_core_hba_show_attr_hba_info(
2928 struct se_hba *hba,
2929 char *page)
2930{
2931 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2932 hba->hba_id, hba->transport->name,
2933 TARGET_CORE_CONFIGFS_VERSION);
2934}
2935
2936SE_HBA_ATTR_RO(hba_info);
2937
2938static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2939 char *page)
2940{
2941 int hba_mode = 0;
2942
2943 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2944 hba_mode = 1;
2945
2946 return sprintf(page, "%d\n", hba_mode);
2947}
2948
2949static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2950 const char *page, size_t count)
2951{
2952 struct se_subsystem_api *transport = hba->transport;
2953 unsigned long mode_flag;
2954 int ret;
2955
2956 if (transport->pmode_enable_hba == NULL)
2957 return -EINVAL;
2958
2959 ret = strict_strtoul(page, 0, &mode_flag);
2960 if (ret < 0) {
6708bb27 2961 pr_err("Unable to extract hba mode flag: %d\n", ret);
c66ac9db
NB		 2962 return -EINVAL;
2963 }
2964
2965 spin_lock(&hba->device_lock);
6708bb27
AG		 2966 if (!list_empty(&hba->hba_dev_list)) {
2967 pr_err("Unable to set hba_mode with active devices\n");
c66ac9db
NB		 2968 spin_unlock(&hba->device_lock);
2969 return -EINVAL;
2970 }
2971 spin_unlock(&hba->device_lock);
2972
2973 ret = transport->pmode_enable_hba(hba, mode_flag);
2974 if (ret < 0)
2975 return -EINVAL;
2976 if (ret > 0)
2977 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2978 else if (ret == 0)
2979 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2980
2981 return count;
2982}
2983
2984SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2985
2986CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2987
1f6fe7cb
NB		 2988static void target_core_hba_release(struct config_item *item)
2989{
2990 struct se_hba *hba = container_of(to_config_group(item),
2991 struct se_hba, hba_group);
2992 core_delete_hba(hba);
2993}
2994
c66ac9db
NB		 2995static struct configfs_attribute *target_core_hba_attrs[] = {
2996 &target_core_hba_hba_info.attr,
2997 &target_core_hba_hba_mode.attr,
2998 NULL,
2999};
3000
3001static struct configfs_item_operations target_core_hba_item_ops = {
1f6fe7cb 3002 .release = target_core_hba_release,
c66ac9db
NB		 3003 .show_attribute = target_core_hba_attr_show,
3004 .store_attribute = target_core_hba_attr_store,
3005};
3006
3007static struct config_item_type target_core_hba_cit = {
3008 .ct_item_ops = &target_core_hba_item_ops,
3009 .ct_group_ops = &target_core_hba_group_ops,
3010 .ct_attrs = target_core_hba_attrs,
3011 .ct_owner = THIS_MODULE,
3012};
3013
3014static struct config_group *target_core_call_addhbatotarget(
3015 struct config_group *group,
3016 const char *name)
3017{
3018 char *se_plugin_str, *str, *str2;
3019 struct se_hba *hba;
3020 char buf[TARGET_CORE_NAME_MAX_LEN];
3021 unsigned long plugin_dep_id = 0;
3022 int ret;
3023
3024 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
60d645a4 3025 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
6708bb27 3026 pr_err("Passed *name strlen(): %d exceeds"
c66ac9db
NB		 3027 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3028 TARGET_CORE_NAME_MAX_LEN);
3029 return ERR_PTR(-ENAMETOOLONG);
3030 }
3031 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3032
3033 str = strstr(buf, "_");
6708bb27
AG		 3034 if (!str) {
3035 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
c66ac9db
NB		 3036 return ERR_PTR(-EINVAL);
3037 }
3038 se_plugin_str = buf;
3039 /*
3040 * Special case for subsystem plugins that have "_" in their names.
3041 * Namely rd_direct and rd_mcp..
3042 */
3043 str2 = strstr(str+1, "_");
6708bb27 3044 if (str2) {
c66ac9db
NB		 3045 *str2 = '\0'; /* Terminate for *se_plugin_str */
3046 str2++; /* Skip to start of plugin dependent ID */
3047 str = str2;
3048 } else {
3049 *str = '\0'; /* Terminate for *se_plugin_str */
3050 str++; /* Skip to start of plugin dependent ID */
3051 }
3052
3053 ret = strict_strtoul(str, 0, &plugin_dep_id);
3054 if (ret < 0) {
6708bb27 3055 pr_err("strict_strtoul() returned %d for"
c66ac9db
NB		 3056 " plugin_dep_id\n", ret);
3057 return ERR_PTR(-EINVAL);
3058 }
3059 /*
3060 * Load up TCM subsystem plugins if they have not already been loaded.
3061 */
dbc5623e 3062 transport_subsystem_check_init();
c66ac9db
NB		 3063
3064 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3065 if (IS_ERR(hba))
3066 return ERR_CAST(hba);
3067
3068 config_group_init_type_name(&hba->hba_group, name,
3069 &target_core_hba_cit);
3070
3071 return &hba->hba_group;
3072}
3073
3074static void target_core_call_delhbafromtarget(
3075 struct config_group *group,
3076 struct config_item *item)
3077{
1f6fe7cb
NB		 3078 /*
3079 * core_delete_hba() is called from target_core_hba_item_ops->release()
3080 * -> target_core_hba_release()
3081 */
c66ac9db 3082 config_item_put(item);
c66ac9db
NB		 3083}
3084
3085static struct configfs_group_operations target_core_group_ops = {
3086 .make_group = target_core_call_addhbatotarget,
3087 .drop_item = target_core_call_delhbafromtarget,
3088};
3089
3090static struct config_item_type target_core_cit = {
3091 .ct_item_ops = NULL,
3092 .ct_group_ops = &target_core_group_ops,
3093 .ct_attrs = NULL,
3094 .ct_owner = THIS_MODULE,
3095};
3096
3097/* Stop functions for struct config_item_type target_core_hba_cit */
3098
54550fab 3099static int __init target_core_init_configfs(void)
c66ac9db
NB		 3100{
3101 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3102 struct config_group *lu_gp_cg = NULL;
3103 struct configfs_subsystem *subsys;
c66ac9db
NB		 3104 struct t10_alua_lu_gp *lu_gp;
3105 int ret;
3106
6708bb27 3107 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
c66ac9db
NB		 3108 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3109 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3110
3111 subsys = target_core_subsystem[0];
3112 config_group_init(&subsys->su_group);
3113 mutex_init(&subsys->su_mutex);
3114
e3d6f909 3115 ret = init_se_kmem_caches();
c66ac9db 3116 if (ret < 0)
e3d6f909 3117 return ret;
c66ac9db
NB		 3118 /*
3119 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3120 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3121 */
3122 target_cg = &subsys->su_group;
3123 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3124 GFP_KERNEL);
6708bb27
AG		 3125 if (!target_cg->default_groups) {
3126 pr_err("Unable to allocate target_cg->default_groups\n");
c66ac9db
NB		 3127 goto out_global;
3128 }
3129
e3d6f909 3130 config_group_init_type_name(&target_core_hbagroup,
c66ac9db 3131 "core", &target_core_cit);
e3d6f909 3132 target_cg->default_groups[0] = &target_core_hbagroup;
c66ac9db
NB		 3133 target_cg->default_groups[1] = NULL;
3134 /*
3135 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3136 */
e3d6f909 3137 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3138 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3139 GFP_KERNEL);
6708bb27
AG		 3140 if (!hba_cg->default_groups) {
3141 pr_err("Unable to allocate hba_cg->default_groups\n");
c66ac9db
NB		 3142 goto out_global;
3143 }
e3d6f909 3144 config_group_init_type_name(&alua_group,
c66ac9db 3145 "alua", &target_core_alua_cit);
e3d6f909 3146 hba_cg->default_groups[0] = &alua_group;
c66ac9db
NB		 3147 hba_cg->default_groups[1] = NULL;
3148 /*
3149 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3150 * groups under /sys/kernel/config/target/core/alua/
3151 */
e3d6f909 3152 alua_cg = &alua_group;
c66ac9db
NB		 3153 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3154 GFP_KERNEL);
6708bb27
AG		 3155 if (!alua_cg->default_groups) {
3156 pr_err("Unable to allocate alua_cg->default_groups\n");
c66ac9db
NB		 3157 goto out_global;
3158 }
3159
e3d6f909 3160 config_group_init_type_name(&alua_lu_gps_group,
c66ac9db 3161 "lu_gps", &target_core_alua_lu_gps_cit);
e3d6f909 3162 alua_cg->default_groups[0] = &alua_lu_gps_group;
c66ac9db
NB		 3163 alua_cg->default_groups[1] = NULL;
3164 /*
3165 * Add core/alua/lu_gps/default_lu_gp
3166 */
3167 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3168 if (IS_ERR(lu_gp))
3169 goto out_global;
3170
e3d6f909 3171 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3172 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3173 GFP_KERNEL);
6708bb27
AG		 3174 if (!lu_gp_cg->default_groups) {
3175 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
c66ac9db
NB		 3176 goto out_global;
3177 }
3178
3179 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3180 &target_core_alua_lu_gp_cit);
3181 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3182 lu_gp_cg->default_groups[1] = NULL;
e3d6f909 3183 default_lu_gp = lu_gp;
c66ac9db
NB		 3184 /*
3185 * Register the target_core_mod subsystem with configfs.
3186 */
3187 ret = configfs_register_subsystem(subsys);
3188 if (ret < 0) {
6708bb27 3189 pr_err("Error %d while registering subsystem %s\n",
c66ac9db
NB		 3190 ret, subsys->su_group.cg_item.ci_namebuf);
3191 goto out_global;
3192 }
6708bb27 3193 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
c66ac9db
NB		 3194 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3195 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3196 /*
3197 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3198 */
3199 ret = rd_module_init();
3200 if (ret < 0)
3201 goto out;
3202
3203 if (core_dev_setup_virtual_lun0() < 0)
3204 goto out;
3205
c66ac9db
NB		 3206 return 0;
3207
3208out:
3209 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3210 core_dev_release_virtual_lun0();
3211 rd_module_exit();
3212out_global:
e3d6f909
AG		 3213 if (default_lu_gp) {
3214 core_alua_free_lu_gp(default_lu_gp);
3215 default_lu_gp = NULL;
c66ac9db
NB		 3216 }
3217 if (lu_gp_cg)
3218 kfree(lu_gp_cg->default_groups);
3219 if (alua_cg)
3220 kfree(alua_cg->default_groups);
3221 if (hba_cg)
3222 kfree(hba_cg->default_groups);
3223 kfree(target_cg->default_groups);
e3d6f909
AG		 3224 release_se_kmem_caches();
3225 return ret;
c66ac9db
NB		 3226}
3227
54550fab 3228static void __exit target_core_exit_configfs(void)
c66ac9db
NB		 3229{
3230 struct configfs_subsystem *subsys;
3231 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3232 struct config_item *item;
3233 int i;
3234
c66ac9db
NB		 3235 subsys = target_core_subsystem[0];
3236
e3d6f909 3237 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3238 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3239 item = &lu_gp_cg->default_groups[i]->cg_item;
3240 lu_gp_cg->default_groups[i] = NULL;
3241 config_item_put(item);
3242 }
3243 kfree(lu_gp_cg->default_groups);
7c2bf6e9 3244 lu_gp_cg->default_groups = NULL;
c66ac9db 3245
e3d6f909 3246 alua_cg = &alua_group;
c66ac9db
NB		 3247 for (i = 0; alua_cg->default_groups[i]; i++) {
3248 item = &alua_cg->default_groups[i]->cg_item;
3249 alua_cg->default_groups[i] = NULL;
3250 config_item_put(item);
3251 }
3252 kfree(alua_cg->default_groups);
7c2bf6e9 3253 alua_cg->default_groups = NULL;
c66ac9db 3254
e3d6f909 3255 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3256 for (i = 0; hba_cg->default_groups[i]; i++) {
3257 item = &hba_cg->default_groups[i]->cg_item;
3258 hba_cg->default_groups[i] = NULL;
3259 config_item_put(item);
3260 }
3261 kfree(hba_cg->default_groups);
7c2bf6e9
NB		 3262 hba_cg->default_groups = NULL;
3263 /*
3264 * We expect subsys->su_group.default_groups to be released
3265 * by configfs subsystem provider logic..
3266 */
3267 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3268 kfree(subsys->su_group.default_groups);
3269
e3d6f909
AG		 3270 core_alua_free_lu_gp(default_lu_gp);
3271 default_lu_gp = NULL;
7c2bf6e9 3272
6708bb27 3273 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
c66ac9db
NB		 3274 " Infrastructure\n");
3275
c66ac9db
NB		 3276 core_dev_release_virtual_lun0();
3277 rd_module_exit();
e3d6f909 3278 release_se_kmem_caches();
c66ac9db
NB		 3279}
3280
3281MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3282MODULE_AUTHOR("nab@Linux-iSCSI.org");
3283MODULE_LICENSE("GPL");
3284
3285module_init(target_core_init_configfs);
3286module_exit(target_core_exit_configfs);
Linux 6.x block layer and io_uring tree(s)