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target: Follow up core updates from AGrover and HCH (round 4)
[mirror_ubuntu-zesty-kernel.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>
26#include <linux/version.h>
27#include <generated/utsrelease.h>
28#include <linux/utsname.h>
29#include <linux/init.h>
30#include <linux/fs.h>
31#include <linux/namei.h>
32#include <linux/slab.h>
33#include <linux/types.h>
34#include <linux/delay.h>
35#include <linux/unistd.h>
36#include <linux/string.h>
37#include <linux/parser.h>
38#include <linux/syscalls.h>
39#include <linux/configfs.h>
e3d6f909 40#include <linux/spinlock.h>
c66ac9db
NB		 41
42#include <target/target_core_base.h>
43#include <target/target_core_device.h>
44#include <target/target_core_transport.h>
45#include <target/target_core_fabric_ops.h>
46#include <target/target_core_fabric_configfs.h>
47#include <target/target_core_configfs.h>
48#include <target/configfs_macros.h>
49
50#include "target_core_alua.h"
51#include "target_core_hba.h"
52#include "target_core_pr.h"
53#include "target_core_rd.h"
12d23384 54#include "target_core_stat.h"
c66ac9db 55
e3d6f909
AG		 56extern struct t10_alua_lu_gp *default_lu_gp;
57
c66ac9db
NB		 58static struct list_head g_tf_list;
59static struct mutex g_tf_lock;
60
61struct target_core_configfs_attribute {
62 struct configfs_attribute attr;
63 ssize_t (*show)(void *, char *);
64 ssize_t (*store)(void *, const char *, size_t);
65};
66
e3d6f909
AG		 67static struct config_group target_core_hbagroup;
68static struct config_group alua_group;
69static struct config_group alua_lu_gps_group;
70
71static DEFINE_SPINLOCK(se_device_lock);
72static LIST_HEAD(se_dev_list);
73
c66ac9db
NB		 74static inline struct se_hba *
75item_to_hba(struct config_item *item)
76{
77 return container_of(to_config_group(item), struct se_hba, hba_group);
78}
79
80/*
81 * Attributes for /sys/kernel/config/target/
82 */
83static ssize_t target_core_attr_show(struct config_item *item,
84 struct configfs_attribute *attr,
85 char *page)
86{
87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
89 utsname()->sysname, utsname()->machine);
90}
91
92static struct configfs_item_operations target_core_fabric_item_ops = {
93 .show_attribute = target_core_attr_show,
94};
95
96static struct configfs_attribute target_core_item_attr_version = {
97 .ca_owner = THIS_MODULE,
98 .ca_name = "version",
99 .ca_mode = S_IRUGO,
100};
101
102static struct target_fabric_configfs *target_core_get_fabric(
103 const char *name)
104{
105 struct target_fabric_configfs *tf;
106
6708bb27 107 if (!name)
c66ac9db
NB		 108 return NULL;
109
110 mutex_lock(&g_tf_lock);
111 list_for_each_entry(tf, &g_tf_list, tf_list) {
6708bb27 112 if (!strcmp(tf->tf_name, name)) {
c66ac9db
NB		 113 atomic_inc(&tf->tf_access_cnt);
114 mutex_unlock(&g_tf_lock);
115 return tf;
116 }
117 }
118 mutex_unlock(&g_tf_lock);
119
120 return NULL;
121}
122
123/*
124 * Called from struct target_core_group_ops->make_group()
125 */
126static struct config_group *target_core_register_fabric(
127 struct config_group *group,
128 const char *name)
129{
130 struct target_fabric_configfs *tf;
131 int ret;
132
6708bb27 133 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
c66ac9db
NB		 134 " %s\n", group, name);
135 /*
136 * Ensure that TCM subsystem plugins are loaded at this point for
137 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
138 * LUN symlinks.
139 */
140 if (transport_subsystem_check_init() < 0)
141 return ERR_PTR(-EINVAL);
142
143 /*
144 * Below are some hardcoded request_module() calls to automatically
145 * local fabric modules when the following is called:
146 *
147 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
148 *
149 * Note that this does not limit which TCM fabric module can be
150 * registered, but simply provids auto loading logic for modules with
151 * mkdir(2) system calls with known TCM fabric modules.
152 */
6708bb27 153 if (!strncmp(name, "iscsi", 5)) {
c66ac9db
NB		 154 /*
155 * Automatically load the LIO Target fabric module when the
156 * following is called:
157 *
158 * mkdir -p $CONFIGFS/target/iscsi
159 */
160 ret = request_module("iscsi_target_mod");
161 if (ret < 0) {
6708bb27 162 pr_err("request_module() failed for"
c66ac9db
NB		 163 " iscsi_target_mod.ko: %d\n", ret);
164 return ERR_PTR(-EINVAL);
165 }
6708bb27 166 } else if (!strncmp(name, "loopback", 8)) {
c66ac9db
NB		 167 /*
168 * Automatically load the tcm_loop fabric module when the
169 * following is called:
170 *
171 * mkdir -p $CONFIGFS/target/loopback
172 */
173 ret = request_module("tcm_loop");
174 if (ret < 0) {
6708bb27 175 pr_err("request_module() failed for"
c66ac9db
NB		 176 " tcm_loop.ko: %d\n", ret);
177 return ERR_PTR(-EINVAL);
178 }
179 }
180
181 tf = target_core_get_fabric(name);
6708bb27
AG		 182 if (!tf) {
183 pr_err("target_core_get_fabric() failed for %s\n",
c66ac9db
NB		 184 name);
185 return ERR_PTR(-EINVAL);
186 }
6708bb27 187 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
c66ac9db
NB		 188 " %s\n", tf->tf_name);
189 /*
190 * On a successful target_core_get_fabric() look, the returned
191 * struct target_fabric_configfs *tf will contain a usage reference.
192 */
6708bb27 193 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
c66ac9db
NB		 194 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
195
196 tf->tf_group.default_groups = tf->tf_default_groups;
197 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
198 tf->tf_group.default_groups[1] = NULL;
199
200 config_group_init_type_name(&tf->tf_group, name,
201 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
202 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
203 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
204
6708bb27 205 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
c66ac9db
NB		 206 " %s\n", tf->tf_group.cg_item.ci_name);
207 /*
208 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
209 */
210 tf->tf_ops.tf_subsys = tf->tf_subsys;
211 tf->tf_fabric = &tf->tf_group.cg_item;
6708bb27 212 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
c66ac9db
NB		 213 " for %s\n", name);
214
215 return &tf->tf_group;
216}
217
218/*
219 * Called from struct target_core_group_ops->drop_item()
220 */
221static void target_core_deregister_fabric(
222 struct config_group *group,
223 struct config_item *item)
224{
225 struct target_fabric_configfs *tf = container_of(
226 to_config_group(item), struct target_fabric_configfs, tf_group);
227 struct config_group *tf_group;
228 struct config_item *df_item;
229 int i;
230
6708bb27 231 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
c66ac9db
NB		 232 " tf list\n", config_item_name(item));
233
6708bb27 234 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
c66ac9db
NB		 235 " %s\n", tf->tf_name);
236 atomic_dec(&tf->tf_access_cnt);
237
6708bb27 238 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
c66ac9db
NB		 239 " tf->tf_fabric for %s\n", tf->tf_name);
240 tf->tf_fabric = NULL;
241
6708bb27 242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
c66ac9db
NB		 243 " %s\n", config_item_name(item));
244
245 tf_group = &tf->tf_group;
246 for (i = 0; tf_group->default_groups[i]; i++) {
247 df_item = &tf_group->default_groups[i]->cg_item;
248 tf_group->default_groups[i] = NULL;
249 config_item_put(df_item);
250 }
251 config_item_put(item);
252}
253
254static struct configfs_group_operations target_core_fabric_group_ops = {
255 .make_group = &target_core_register_fabric,
256 .drop_item = &target_core_deregister_fabric,
257};
258
259/*
260 * All item attributes appearing in /sys/kernel/target/ appear here.
261 */
262static struct configfs_attribute *target_core_fabric_item_attrs[] = {
263 &target_core_item_attr_version,
264 NULL,
265};
266
267/*
268 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
269 */
270static struct config_item_type target_core_fabrics_item = {
271 .ct_item_ops = &target_core_fabric_item_ops,
272 .ct_group_ops = &target_core_fabric_group_ops,
273 .ct_attrs = target_core_fabric_item_attrs,
274 .ct_owner = THIS_MODULE,
275};
276
277static struct configfs_subsystem target_core_fabrics = {
278 .su_group = {
279 .cg_item = {
280 .ci_namebuf = "target",
281 .ci_type = &target_core_fabrics_item,
282 },
283 },
284};
285
286static struct configfs_subsystem *target_core_subsystem[] = {
287 &target_core_fabrics,
288 NULL,
289};
290
291/*##############################################################################
292// Start functions called by external Target Fabrics Modules
293//############################################################################*/
294
295/*
296 * First function called by fabric modules to:
297 *
298 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
299 * 2) Add struct target_fabric_configfs to g_tf_list
300 * 3) Return struct target_fabric_configfs to fabric module to be passed
301 * into target_fabric_configfs_register().
302 */
303struct target_fabric_configfs *target_fabric_configfs_init(
304 struct module *fabric_mod,
305 const char *name)
306{
307 struct target_fabric_configfs *tf;
308
c66ac9db 309 if (!(name)) {
6708bb27 310 pr_err("Unable to locate passed fabric name\n");
e3d6f909 311 return ERR_PTR(-EINVAL);
c66ac9db 312 }
60d645a4 313 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
6708bb27 314 pr_err("Passed name: %s exceeds TARGET_FABRIC"
c66ac9db 315 "_NAME_SIZE\n", name);
e3d6f909 316 return ERR_PTR(-EINVAL);
c66ac9db
NB		 317 }
318
319 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
6708bb27 320 if (!tf)
e3d6f909 321 return ERR_PTR(-ENOMEM);
c66ac9db
NB		 322
323 INIT_LIST_HEAD(&tf->tf_list);
324 atomic_set(&tf->tf_access_cnt, 0);
325 /*
326 * Setup the default generic struct config_item_type's (cits) in
327 * struct target_fabric_configfs->tf_cit_tmpl
328 */
329 tf->tf_module = fabric_mod;
330 target_fabric_setup_cits(tf);
331
332 tf->tf_subsys = target_core_subsystem[0];
333 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
334
335 mutex_lock(&g_tf_lock);
336 list_add_tail(&tf->tf_list, &g_tf_list);
337 mutex_unlock(&g_tf_lock);
338
6708bb27 339 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
c66ac9db 340 ">>>>>>>>>>>>>>\n");
6708bb27 341 pr_debug("Initialized struct target_fabric_configfs: %p for"
c66ac9db
NB		 342 " %s\n", tf, tf->tf_name);
343 return tf;
344}
345EXPORT_SYMBOL(target_fabric_configfs_init);
346
347/*
348 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
349 */
350void target_fabric_configfs_free(
351 struct target_fabric_configfs *tf)
352{
353 mutex_lock(&g_tf_lock);
354 list_del(&tf->tf_list);
355 mutex_unlock(&g_tf_lock);
356
357 kfree(tf);
358}
359EXPORT_SYMBOL(target_fabric_configfs_free);
360
361/*
362 * Perform a sanity check of the passed tf->tf_ops before completing
363 * TCM fabric module registration.
364 */
365static int target_fabric_tf_ops_check(
366 struct target_fabric_configfs *tf)
367{
368 struct target_core_fabric_ops *tfo = &tf->tf_ops;
369
6708bb27
AG		 370 if (!tfo->get_fabric_name) {
371 pr_err("Missing tfo->get_fabric_name()\n");
c66ac9db
NB		 372 return -EINVAL;
373 }
6708bb27
AG		 374 if (!tfo->get_fabric_proto_ident) {
375 pr_err("Missing tfo->get_fabric_proto_ident()\n");
c66ac9db
NB		 376 return -EINVAL;
377 }
6708bb27
AG		 378 if (!tfo->tpg_get_wwn) {
379 pr_err("Missing tfo->tpg_get_wwn()\n");
c66ac9db
NB		 380 return -EINVAL;
381 }
6708bb27
AG		 382 if (!tfo->tpg_get_tag) {
383 pr_err("Missing tfo->tpg_get_tag()\n");
c66ac9db
NB		 384 return -EINVAL;
385 }
6708bb27
AG		 386 if (!tfo->tpg_get_default_depth) {
387 pr_err("Missing tfo->tpg_get_default_depth()\n");
c66ac9db
NB		 388 return -EINVAL;
389 }
6708bb27
AG		 390 if (!tfo->tpg_get_pr_transport_id) {
391 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
c66ac9db
NB		 392 return -EINVAL;
393 }
6708bb27
AG		 394 if (!tfo->tpg_get_pr_transport_id_len) {
395 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
c66ac9db
NB		 396 return -EINVAL;
397 }
6708bb27
AG		 398 if (!tfo->tpg_check_demo_mode) {
399 pr_err("Missing tfo->tpg_check_demo_mode()\n");
c66ac9db
NB		 400 return -EINVAL;
401 }
6708bb27
AG		 402 if (!tfo->tpg_check_demo_mode_cache) {
403 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
c66ac9db
NB		 404 return -EINVAL;
405 }
6708bb27
AG		 406 if (!tfo->tpg_check_demo_mode_write_protect) {
407 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
c66ac9db
NB		 408 return -EINVAL;
409 }
6708bb27
AG		 410 if (!tfo->tpg_check_prod_mode_write_protect) {
411 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
c66ac9db
NB		 412 return -EINVAL;
413 }
6708bb27
AG		 414 if (!tfo->tpg_alloc_fabric_acl) {
415 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
c66ac9db
NB		 416 return -EINVAL;
417 }
6708bb27
AG		 418 if (!tfo->tpg_release_fabric_acl) {
419 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
c66ac9db
NB		 420 return -EINVAL;
421 }
6708bb27
AG		 422 if (!tfo->tpg_get_inst_index) {
423 pr_err("Missing tfo->tpg_get_inst_index()\n");
c66ac9db
NB		 424 return -EINVAL;
425 }
35462975 426 if (!tfo->release_cmd) {
6708bb27 427 pr_err("Missing tfo->release_cmd()\n");
c66ac9db
NB		 428 return -EINVAL;
429 }
6708bb27
AG		 430 if (!tfo->shutdown_session) {
431 pr_err("Missing tfo->shutdown_session()\n");
c66ac9db
NB		 432 return -EINVAL;
433 }
6708bb27
AG		 434 if (!tfo->close_session) {
435 pr_err("Missing tfo->close_session()\n");
c66ac9db
NB		 436 return -EINVAL;
437 }
6708bb27
AG		 438 if (!tfo->stop_session) {
439 pr_err("Missing tfo->stop_session()\n");
c66ac9db
NB		 440 return -EINVAL;
441 }
6708bb27
AG		 442 if (!tfo->fall_back_to_erl0) {
443 pr_err("Missing tfo->fall_back_to_erl0()\n");
c66ac9db
NB		 444 return -EINVAL;
445 }
6708bb27
AG		 446 if (!tfo->sess_logged_in) {
447 pr_err("Missing tfo->sess_logged_in()\n");
c66ac9db
NB		 448 return -EINVAL;
449 }
6708bb27
AG		 450 if (!tfo->sess_get_index) {
451 pr_err("Missing tfo->sess_get_index()\n");
c66ac9db
NB		 452 return -EINVAL;
453 }
6708bb27
AG		 454 if (!tfo->write_pending) {
455 pr_err("Missing tfo->write_pending()\n");
c66ac9db
NB		 456 return -EINVAL;
457 }
6708bb27
AG		 458 if (!tfo->write_pending_status) {
459 pr_err("Missing tfo->write_pending_status()\n");
c66ac9db
NB		 460 return -EINVAL;
461 }
6708bb27
AG		 462 if (!tfo->set_default_node_attributes) {
463 pr_err("Missing tfo->set_default_node_attributes()\n");
c66ac9db
NB		 464 return -EINVAL;
465 }
6708bb27
AG		 466 if (!tfo->get_task_tag) {
467 pr_err("Missing tfo->get_task_tag()\n");
c66ac9db
NB		 468 return -EINVAL;
469 }
6708bb27
AG		 470 if (!tfo->get_cmd_state) {
471 pr_err("Missing tfo->get_cmd_state()\n");
c66ac9db
NB		 472 return -EINVAL;
473 }
6708bb27
AG		 474 if (!tfo->queue_data_in) {
475 pr_err("Missing tfo->queue_data_in()\n");
c66ac9db
NB		 476 return -EINVAL;
477 }
6708bb27
AG		 478 if (!tfo->queue_status) {
479 pr_err("Missing tfo->queue_status()\n");
c66ac9db
NB		 480 return -EINVAL;
481 }
6708bb27
AG		 482 if (!tfo->queue_tm_rsp) {
483 pr_err("Missing tfo->queue_tm_rsp()\n");
c66ac9db
NB		 484 return -EINVAL;
485 }
6708bb27
AG		 486 if (!tfo->set_fabric_sense_len) {
487 pr_err("Missing tfo->set_fabric_sense_len()\n");
c66ac9db
NB		 488 return -EINVAL;
489 }
6708bb27
AG		 490 if (!tfo->get_fabric_sense_len) {
491 pr_err("Missing tfo->get_fabric_sense_len()\n");
c66ac9db
NB		 492 return -EINVAL;
493 }
6708bb27
AG		 494 if (!tfo->is_state_remove) {
495 pr_err("Missing tfo->is_state_remove()\n");
c66ac9db
NB		 496 return -EINVAL;
497 }
c66ac9db
NB		 498 /*
499 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
500 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
501 * target_core_fabric_configfs.c WWN+TPG group context code.
502 */
6708bb27
AG		 503 if (!tfo->fabric_make_wwn) {
504 pr_err("Missing tfo->fabric_make_wwn()\n");
c66ac9db
NB		 505 return -EINVAL;
506 }
6708bb27
AG		 507 if (!tfo->fabric_drop_wwn) {
508 pr_err("Missing tfo->fabric_drop_wwn()\n");
c66ac9db
NB		 509 return -EINVAL;
510 }
6708bb27
AG		 511 if (!tfo->fabric_make_tpg) {
512 pr_err("Missing tfo->fabric_make_tpg()\n");
c66ac9db
NB		 513 return -EINVAL;
514 }
6708bb27
AG		 515 if (!tfo->fabric_drop_tpg) {
516 pr_err("Missing tfo->fabric_drop_tpg()\n");
c66ac9db
NB		 517 return -EINVAL;
518 }
519
520 return 0;
521}
522
523/*
524 * Called 2nd from fabric module with returned parameter of
525 * struct target_fabric_configfs * from target_fabric_configfs_init().
526 *
527 * Upon a successful registration, the new fabric's struct config_item is
528 * return. Also, a pointer to this struct is set in the passed
529 * struct target_fabric_configfs.
530 */
531int target_fabric_configfs_register(
532 struct target_fabric_configfs *tf)
533{
c66ac9db
NB		 534 int ret;
535
6708bb27
AG		 536 if (!tf) {
537 pr_err("Unable to locate target_fabric_configfs"
c66ac9db
NB		 538 " pointer\n");
539 return -EINVAL;
540 }
6708bb27
AG		 541 if (!tf->tf_subsys) {
542 pr_err("Unable to target struct config_subsystem"
c66ac9db
NB		 543 " pointer\n");
544 return -EINVAL;
545 }
c66ac9db
NB		 546 ret = target_fabric_tf_ops_check(tf);
547 if (ret < 0)
548 return ret;
549
6708bb27 550 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
c66ac9db
NB		 551 ">>>>>>>>>>\n");
552 return 0;
553}
554EXPORT_SYMBOL(target_fabric_configfs_register);
555
556void target_fabric_configfs_deregister(
557 struct target_fabric_configfs *tf)
558{
c66ac9db
NB		 559 struct configfs_subsystem *su;
560
6708bb27
AG		 561 if (!tf) {
562 pr_err("Unable to locate passed target_fabric_"
c66ac9db
NB		 563 "configfs\n");
564 return;
565 }
566 su = tf->tf_subsys;
6708bb27
AG		 567 if (!su) {
568 pr_err("Unable to locate passed tf->tf_subsys"
c66ac9db
NB		 569 " pointer\n");
570 return;
571 }
6708bb27 572 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
c66ac9db
NB		 573 ">>>>>>>>>>>>\n");
574 mutex_lock(&g_tf_lock);
575 if (atomic_read(&tf->tf_access_cnt)) {
576 mutex_unlock(&g_tf_lock);
6708bb27 577 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
c66ac9db
NB		 578 tf->tf_name);
579 BUG();
580 }
581 list_del(&tf->tf_list);
582 mutex_unlock(&g_tf_lock);
583
6708bb27 584 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
c66ac9db
NB		 585 " %s\n", tf->tf_name);
586 tf->tf_module = NULL;
587 tf->tf_subsys = NULL;
588 kfree(tf);
589
6708bb27 590 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
c66ac9db 591 ">>>>>\n");
c66ac9db
NB		 592}
593EXPORT_SYMBOL(target_fabric_configfs_deregister);
594
595/*##############################################################################
596// Stop functions called by external Target Fabrics Modules
597//############################################################################*/
598
599/* Start functions for struct config_item_type target_core_dev_attrib_cit */
600
601#define DEF_DEV_ATTRIB_SHOW(_name) \
602static ssize_t target_core_dev_show_attr_##_name( \
603 struct se_dev_attrib *da, \
604 char *page) \
605{ \
606 struct se_device *dev; \
607 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
608 ssize_t rb; \
609 \
610 spin_lock(&se_dev->se_dev_lock); \
611 dev = se_dev->se_dev_ptr; \
6708bb27 612 if (!dev) { \
c66ac9db
NB		 613 spin_unlock(&se_dev->se_dev_lock); \
614 return -ENODEV; \
615 } \
e3d6f909
AG		 616 rb = snprintf(page, PAGE_SIZE, "%u\n", \
617 (u32)dev->se_sub_dev->se_dev_attrib._name); \
c66ac9db
NB		 618 spin_unlock(&se_dev->se_dev_lock); \
619 \
620 return rb; \
621}
622
623#define DEF_DEV_ATTRIB_STORE(_name) \
624static ssize_t target_core_dev_store_attr_##_name( \
625 struct se_dev_attrib *da, \
626 const char *page, \
627 size_t count) \
628{ \
629 struct se_device *dev; \
630 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
631 unsigned long val; \
632 int ret; \
633 \
634 spin_lock(&se_dev->se_dev_lock); \
635 dev = se_dev->se_dev_ptr; \
6708bb27 636 if (!dev) { \
c66ac9db
NB		 637 spin_unlock(&se_dev->se_dev_lock); \
638 return -ENODEV; \
639 } \
640 ret = strict_strtoul(page, 0, &val); \
641 if (ret < 0) { \
642 spin_unlock(&se_dev->se_dev_lock); \
6708bb27 643 pr_err("strict_strtoul() failed with" \
c66ac9db
NB		 644 " ret: %d\n", ret); \
645 return -EINVAL; \
646 } \
647 ret = se_dev_set_##_name(dev, (u32)val); \
648 spin_unlock(&se_dev->se_dev_lock); \
649 \
650 return (!ret) ? count : -EINVAL; \
651}
652
653#define DEF_DEV_ATTRIB(_name) \
654DEF_DEV_ATTRIB_SHOW(_name); \
655DEF_DEV_ATTRIB_STORE(_name);
656
657#define DEF_DEV_ATTRIB_RO(_name) \
658DEF_DEV_ATTRIB_SHOW(_name);
659
660CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
661#define SE_DEV_ATTR(_name, _mode) \
662static struct target_core_dev_attrib_attribute \
663 target_core_dev_attrib_##_name = \
664 __CONFIGFS_EATTR(_name, _mode, \
665 target_core_dev_show_attr_##_name, \
666 target_core_dev_store_attr_##_name);
667
668#define SE_DEV_ATTR_RO(_name); \
669static struct target_core_dev_attrib_attribute \
670 target_core_dev_attrib_##_name = \
671 __CONFIGFS_EATTR_RO(_name, \
672 target_core_dev_show_attr_##_name);
673
674DEF_DEV_ATTRIB(emulate_dpo);
675SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
676
677DEF_DEV_ATTRIB(emulate_fua_write);
678SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
679
680DEF_DEV_ATTRIB(emulate_fua_read);
681SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
682
683DEF_DEV_ATTRIB(emulate_write_cache);
684SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
685
686DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
687SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
688
689DEF_DEV_ATTRIB(emulate_tas);
690SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
691
692DEF_DEV_ATTRIB(emulate_tpu);
693SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
694
695DEF_DEV_ATTRIB(emulate_tpws);
696SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
697
698DEF_DEV_ATTRIB(enforce_pr_isids);
699SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
700
e22a7f07
RD		 701DEF_DEV_ATTRIB(is_nonrot);
702SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
703
c66ac9db
NB		 704DEF_DEV_ATTRIB_RO(hw_block_size);
705SE_DEV_ATTR_RO(hw_block_size);
706
707DEF_DEV_ATTRIB(block_size);
708SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
709
710DEF_DEV_ATTRIB_RO(hw_max_sectors);
711SE_DEV_ATTR_RO(hw_max_sectors);
712
713DEF_DEV_ATTRIB(max_sectors);
714SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
715
716DEF_DEV_ATTRIB(optimal_sectors);
717SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
718
719DEF_DEV_ATTRIB_RO(hw_queue_depth);
720SE_DEV_ATTR_RO(hw_queue_depth);
721
722DEF_DEV_ATTRIB(queue_depth);
723SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
724
725DEF_DEV_ATTRIB(task_timeout);
726SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
727
728DEF_DEV_ATTRIB(max_unmap_lba_count);
729SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
730
731DEF_DEV_ATTRIB(max_unmap_block_desc_count);
732SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
733
734DEF_DEV_ATTRIB(unmap_granularity);
735SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
736
737DEF_DEV_ATTRIB(unmap_granularity_alignment);
738SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
739
740CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
741
742static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
743 &target_core_dev_attrib_emulate_dpo.attr,
744 &target_core_dev_attrib_emulate_fua_write.attr,
745 &target_core_dev_attrib_emulate_fua_read.attr,
746 &target_core_dev_attrib_emulate_write_cache.attr,
747 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
748 &target_core_dev_attrib_emulate_tas.attr,
749 &target_core_dev_attrib_emulate_tpu.attr,
750 &target_core_dev_attrib_emulate_tpws.attr,
751 &target_core_dev_attrib_enforce_pr_isids.attr,
e22a7f07 752 &target_core_dev_attrib_is_nonrot.attr,
c66ac9db
NB		 753 &target_core_dev_attrib_hw_block_size.attr,
754 &target_core_dev_attrib_block_size.attr,
755 &target_core_dev_attrib_hw_max_sectors.attr,
756 &target_core_dev_attrib_max_sectors.attr,
757 &target_core_dev_attrib_optimal_sectors.attr,
758 &target_core_dev_attrib_hw_queue_depth.attr,
759 &target_core_dev_attrib_queue_depth.attr,
760 &target_core_dev_attrib_task_timeout.attr,
761 &target_core_dev_attrib_max_unmap_lba_count.attr,
762 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
763 &target_core_dev_attrib_unmap_granularity.attr,
764 &target_core_dev_attrib_unmap_granularity_alignment.attr,
765 NULL,
766};
767
768static struct configfs_item_operations target_core_dev_attrib_ops = {
769 .show_attribute = target_core_dev_attrib_attr_show,
770 .store_attribute = target_core_dev_attrib_attr_store,
771};
772
773static struct config_item_type target_core_dev_attrib_cit = {
774 .ct_item_ops = &target_core_dev_attrib_ops,
775 .ct_attrs = target_core_dev_attrib_attrs,
776 .ct_owner = THIS_MODULE,
777};
778
779/* End functions for struct config_item_type target_core_dev_attrib_cit */
780
781/* Start functions for struct config_item_type target_core_dev_wwn_cit */
782
783CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
784#define SE_DEV_WWN_ATTR(_name, _mode) \
785static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
786 __CONFIGFS_EATTR(_name, _mode, \
787 target_core_dev_wwn_show_attr_##_name, \
788 target_core_dev_wwn_store_attr_##_name);
789
790#define SE_DEV_WWN_ATTR_RO(_name); \
791do { \
792 static struct target_core_dev_wwn_attribute \
793 target_core_dev_wwn_##_name = \
794 __CONFIGFS_EATTR_RO(_name, \
795 target_core_dev_wwn_show_attr_##_name); \
796} while (0);
797
798/*
799 * VPD page 0x80 Unit serial
800 */
801static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
802 struct t10_wwn *t10_wwn,
803 char *page)
804{
805 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
806 struct se_device *dev;
807
808 dev = se_dev->se_dev_ptr;
6708bb27 809 if (!dev)
c66ac9db
NB		 810 return -ENODEV;
811
812 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
813 &t10_wwn->unit_serial[0]);
814}
815
816static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
817 struct t10_wwn *t10_wwn,
818 const char *page,
819 size_t count)
820{
821 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
822 struct se_device *dev;
823 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
824
825 /*
826 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
827 * from the struct scsi_device level firmware, do not allow
828 * VPD Unit Serial to be emulated.
829 *
830 * Note this struct scsi_device could also be emulating VPD
831 * information from its drivers/scsi LLD. But for now we assume
832 * it is doing 'the right thing' wrt a world wide unique
833 * VPD Unit Serial Number that OS dependent multipath can depend on.
834 */
835 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
6708bb27 836 pr_err("Underlying SCSI device firmware provided VPD"
c66ac9db
NB		 837 " Unit Serial, ignoring request\n");
838 return -EOPNOTSUPP;
839 }
840
60d645a4 841 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
6708bb27 842 pr_err("Emulated VPD Unit Serial exceeds"
c66ac9db
NB		 843 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
844 return -EOVERFLOW;
845 }
846 /*
847 * Check to see if any active $FABRIC_MOD exports exist. If they
848 * do exist, fail here as changing this information on the fly
849 * (underneath the initiator side OS dependent multipath code)
850 * could cause negative effects.
851 */
852 dev = su_dev->se_dev_ptr;
6708bb27 853 if (dev) {
c66ac9db 854 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
6708bb27 855 pr_err("Unable to set VPD Unit Serial while"
c66ac9db
NB		 856 " active %d $FABRIC_MOD exports exist\n",
857 atomic_read(&dev->dev_export_obj.obj_access_count));
858 return -EINVAL;
859 }
860 }
861 /*
862 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
863 *
864 * Also, strip any newline added from the userspace
865 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
866 */
867 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
868 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
869 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
870 "%s", strstrip(buf));
871 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
872
6708bb27 873 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
c66ac9db
NB		 874 " %s\n", su_dev->t10_wwn.unit_serial);
875
876 return count;
877}
878
879SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
880
881/*
882 * VPD page 0x83 Protocol Identifier
883 */
884static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
885 struct t10_wwn *t10_wwn,
886 char *page)
887{
888 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
889 struct se_device *dev;
890 struct t10_vpd *vpd;
891 unsigned char buf[VPD_TMP_BUF_SIZE];
892 ssize_t len = 0;
893
894 dev = se_dev->se_dev_ptr;
6708bb27 895 if (!dev)
c66ac9db
NB		 896 return -ENODEV;
897
898 memset(buf, 0, VPD_TMP_BUF_SIZE);
899
900 spin_lock(&t10_wwn->t10_vpd_lock);
901 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
6708bb27 902 if (!vpd->protocol_identifier_set)
c66ac9db
NB		 903 continue;
904
905 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
906
6708bb27 907 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 908 break;
909
910 len += sprintf(page+len, "%s", buf);
911 }
912 spin_unlock(&t10_wwn->t10_vpd_lock);
913
914 return len;
915}
916
917static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
918 struct t10_wwn *t10_wwn,
919 const char *page,
920 size_t count)
921{
922 return -ENOSYS;
923}
924
925SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
926
927/*
928 * Generic wrapper for dumping VPD identifiers by association.
929 */
930#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
931static ssize_t target_core_dev_wwn_show_attr_##_name( \
932 struct t10_wwn *t10_wwn, \
933 char *page) \
934{ \
935 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
936 struct se_device *dev; \
937 struct t10_vpd *vpd; \
938 unsigned char buf[VPD_TMP_BUF_SIZE]; \
939 ssize_t len = 0; \
940 \
941 dev = se_dev->se_dev_ptr; \
6708bb27 942 if (!dev) \
c66ac9db
NB		 943 return -ENODEV; \
944 \
945 spin_lock(&t10_wwn->t10_vpd_lock); \
946 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
947 if (vpd->association != _assoc) \
948 continue; \
949 \
950 memset(buf, 0, VPD_TMP_BUF_SIZE); \
951 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 952 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 953 break; \
954 len += sprintf(page+len, "%s", buf); \
955 \
956 memset(buf, 0, VPD_TMP_BUF_SIZE); \
957 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 958 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 959 break; \
960 len += sprintf(page+len, "%s", buf); \
961 \
962 memset(buf, 0, VPD_TMP_BUF_SIZE); \
963 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
6708bb27 964 if (len + strlen(buf) >= PAGE_SIZE) \
c66ac9db
NB		 965 break; \
966 len += sprintf(page+len, "%s", buf); \
967 } \
968 spin_unlock(&t10_wwn->t10_vpd_lock); \
969 \
970 return len; \
971}
972
973/*
974 * VPD page 0x83 Assoication: Logical Unit
975 */
976DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
977
978static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
979 struct t10_wwn *t10_wwn,
980 const char *page,
981 size_t count)
982{
983 return -ENOSYS;
984}
985
986SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
987
988/*
989 * VPD page 0x83 Association: Target Port
990 */
991DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
992
993static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
994 struct t10_wwn *t10_wwn,
995 const char *page,
996 size_t count)
997{
998 return -ENOSYS;
999}
1000
1001SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1002
1003/*
1004 * VPD page 0x83 Association: SCSI Target Device
1005 */
1006DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1007
1008static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1009 struct t10_wwn *t10_wwn,
1010 const char *page,
1011 size_t count)
1012{
1013 return -ENOSYS;
1014}
1015
1016SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1017
1018CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1019
1020static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1021 &target_core_dev_wwn_vpd_unit_serial.attr,
1022 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1023 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1024 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1025 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1026 NULL,
1027};
1028
1029static struct configfs_item_operations target_core_dev_wwn_ops = {
1030 .show_attribute = target_core_dev_wwn_attr_show,
1031 .store_attribute = target_core_dev_wwn_attr_store,
1032};
1033
1034static struct config_item_type target_core_dev_wwn_cit = {
1035 .ct_item_ops = &target_core_dev_wwn_ops,
1036 .ct_attrs = target_core_dev_wwn_attrs,
1037 .ct_owner = THIS_MODULE,
1038};
1039
1040/* End functions for struct config_item_type target_core_dev_wwn_cit */
1041
1042/* Start functions for struct config_item_type target_core_dev_pr_cit */
1043
1044CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1045#define SE_DEV_PR_ATTR(_name, _mode) \
1046static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1047 __CONFIGFS_EATTR(_name, _mode, \
1048 target_core_dev_pr_show_attr_##_name, \
1049 target_core_dev_pr_store_attr_##_name);
1050
1051#define SE_DEV_PR_ATTR_RO(_name); \
1052static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1053 __CONFIGFS_EATTR_RO(_name, \
1054 target_core_dev_pr_show_attr_##_name);
1055
1056/*
1057 * res_holder
1058 */
1059static ssize_t target_core_dev_pr_show_spc3_res(
1060 struct se_device *dev,
1061 char *page,
1062 ssize_t *len)
1063{
1064 struct se_node_acl *se_nacl;
1065 struct t10_pr_registration *pr_reg;
1066 char i_buf[PR_REG_ISID_ID_LEN];
1067 int prf_isid;
1068
1069 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1070
1071 spin_lock(&dev->dev_reservation_lock);
1072 pr_reg = dev->dev_pr_res_holder;
6708bb27 1073 if (!pr_reg) {
c66ac9db
NB		 1074 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1075 spin_unlock(&dev->dev_reservation_lock);
1076 return *len;
1077 }
1078 se_nacl = pr_reg->pr_reg_nacl;
1079 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1080 PR_REG_ISID_ID_LEN);
1081
1082 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
e3d6f909 1083 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 1084 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1085 spin_unlock(&dev->dev_reservation_lock);
1086
1087 return *len;
1088}
1089
1090static ssize_t target_core_dev_pr_show_spc2_res(
1091 struct se_device *dev,
1092 char *page,
1093 ssize_t *len)
1094{
1095 struct se_node_acl *se_nacl;
1096
1097 spin_lock(&dev->dev_reservation_lock);
1098 se_nacl = dev->dev_reserved_node_acl;
6708bb27 1099 if (!se_nacl) {
c66ac9db
NB		 1100 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1101 spin_unlock(&dev->dev_reservation_lock);
1102 return *len;
1103 }
1104 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
e3d6f909 1105 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 1106 se_nacl->initiatorname);
1107 spin_unlock(&dev->dev_reservation_lock);
1108
1109 return *len;
1110}
1111
1112static ssize_t target_core_dev_pr_show_attr_res_holder(
1113 struct se_subsystem_dev *su_dev,
1114 char *page)
1115{
1116 ssize_t len = 0;
1117
6708bb27 1118 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1119 return -ENODEV;
1120
e3d6f909 1121 switch (su_dev->t10_pr.res_type) {
c66ac9db
NB		 1122 case SPC3_PERSISTENT_RESERVATIONS:
1123 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1124 page, &len);
1125 break;
1126 case SPC2_RESERVATIONS:
1127 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1128 page, &len);
1129 break;
1130 case SPC_PASSTHROUGH:
1131 len += sprintf(page+len, "Passthrough\n");
1132 break;
1133 default:
1134 len += sprintf(page+len, "Unknown\n");
1135 break;
1136 }
1137
1138 return len;
1139}
1140
1141SE_DEV_PR_ATTR_RO(res_holder);
1142
1143/*
1144 * res_pr_all_tgt_pts
1145 */
1146static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1147 struct se_subsystem_dev *su_dev,
1148 char *page)
1149{
1150 struct se_device *dev;
1151 struct t10_pr_registration *pr_reg;
1152 ssize_t len = 0;
1153
1154 dev = su_dev->se_dev_ptr;
6708bb27 1155 if (!dev)
c66ac9db
NB		 1156 return -ENODEV;
1157
e3d6f909 1158 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1159 return len;
1160
1161 spin_lock(&dev->dev_reservation_lock);
1162 pr_reg = dev->dev_pr_res_holder;
6708bb27 1163 if (!pr_reg) {
c66ac9db
NB		 1164 len = sprintf(page, "No SPC-3 Reservation holder\n");
1165 spin_unlock(&dev->dev_reservation_lock);
1166 return len;
1167 }
1168 /*
1169 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1170 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1171 */
1172 if (pr_reg->pr_reg_all_tg_pt)
1173 len = sprintf(page, "SPC-3 Reservation: All Target"
1174 " Ports registration\n");
1175 else
1176 len = sprintf(page, "SPC-3 Reservation: Single"
1177 " Target Port registration\n");
1178 spin_unlock(&dev->dev_reservation_lock);
1179
1180 return len;
1181}
1182
1183SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1184
1185/*
1186 * res_pr_generation
1187 */
1188static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1189 struct se_subsystem_dev *su_dev,
1190 char *page)
1191{
6708bb27 1192 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1193 return -ENODEV;
1194
e3d6f909 1195 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1196 return 0;
1197
e3d6f909 1198 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
c66ac9db
NB		 1199}
1200
1201SE_DEV_PR_ATTR_RO(res_pr_generation);
1202
1203/*
1204 * res_pr_holder_tg_port
1205 */
1206static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1207 struct se_subsystem_dev *su_dev,
1208 char *page)
1209{
1210 struct se_device *dev;
1211 struct se_node_acl *se_nacl;
1212 struct se_lun *lun;
1213 struct se_portal_group *se_tpg;
1214 struct t10_pr_registration *pr_reg;
1215 struct target_core_fabric_ops *tfo;
1216 ssize_t len = 0;
1217
1218 dev = su_dev->se_dev_ptr;
6708bb27 1219 if (!dev)
c66ac9db
NB		 1220 return -ENODEV;
1221
e3d6f909 1222 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1223 return len;
1224
1225 spin_lock(&dev->dev_reservation_lock);
1226 pr_reg = dev->dev_pr_res_holder;
6708bb27 1227 if (!pr_reg) {
c66ac9db
NB		 1228 len = sprintf(page, "No SPC-3 Reservation holder\n");
1229 spin_unlock(&dev->dev_reservation_lock);
1230 return len;
1231 }
1232 se_nacl = pr_reg->pr_reg_nacl;
1233 se_tpg = se_nacl->se_tpg;
1234 lun = pr_reg->pr_reg_tg_pt_lun;
e3d6f909 1235 tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 1236
1237 len += sprintf(page+len, "SPC-3 Reservation: %s"
1238 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1239 tfo->tpg_get_wwn(se_tpg));
1240 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1241 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1242 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1243 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1244 tfo->get_fabric_name(), lun->unpacked_lun);
1245 spin_unlock(&dev->dev_reservation_lock);
1246
1247 return len;
1248}
1249
1250SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1251
1252/*
1253 * res_pr_registered_i_pts
1254 */
1255static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1256 struct se_subsystem_dev *su_dev,
1257 char *page)
1258{
1259 struct target_core_fabric_ops *tfo;
1260 struct t10_pr_registration *pr_reg;
1261 unsigned char buf[384];
1262 char i_buf[PR_REG_ISID_ID_LEN];
1263 ssize_t len = 0;
1264 int reg_count = 0, prf_isid;
1265
6708bb27 1266 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1267 return -ENODEV;
1268
e3d6f909 1269 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1270 return len;
1271
1272 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1273
e3d6f909
AG		 1274 spin_lock(&su_dev->t10_pr.registration_lock);
1275 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
c66ac9db
NB		 1276 pr_reg_list) {
1277
1278 memset(buf, 0, 384);
1279 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1280 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1281 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1282 PR_REG_ISID_ID_LEN);
1283 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1284 tfo->get_fabric_name(),
1285 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1286 &i_buf[0] : "", pr_reg->pr_res_key,
1287 pr_reg->pr_res_generation);
1288
6708bb27 1289 if (len + strlen(buf) >= PAGE_SIZE)
c66ac9db
NB		 1290 break;
1291
1292 len += sprintf(page+len, "%s", buf);
1293 reg_count++;
1294 }
e3d6f909 1295 spin_unlock(&su_dev->t10_pr.registration_lock);
c66ac9db 1296
6708bb27 1297 if (!reg_count)
c66ac9db
NB		 1298 len += sprintf(page+len, "None\n");
1299
1300 return len;
1301}
1302
1303SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1304
1305/*
1306 * res_pr_type
1307 */
1308static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1309 struct se_subsystem_dev *su_dev,
1310 char *page)
1311{
1312 struct se_device *dev;
1313 struct t10_pr_registration *pr_reg;
1314 ssize_t len = 0;
1315
1316 dev = su_dev->se_dev_ptr;
6708bb27 1317 if (!dev)
c66ac9db
NB		 1318 return -ENODEV;
1319
e3d6f909 1320 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1321 return len;
1322
1323 spin_lock(&dev->dev_reservation_lock);
1324 pr_reg = dev->dev_pr_res_holder;
6708bb27 1325 if (!pr_reg) {
c66ac9db
NB		 1326 len = sprintf(page, "No SPC-3 Reservation holder\n");
1327 spin_unlock(&dev->dev_reservation_lock);
1328 return len;
1329 }
1330 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1331 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1332 spin_unlock(&dev->dev_reservation_lock);
1333
1334 return len;
1335}
1336
1337SE_DEV_PR_ATTR_RO(res_pr_type);
1338
1339/*
1340 * res_type
1341 */
1342static ssize_t target_core_dev_pr_show_attr_res_type(
1343 struct se_subsystem_dev *su_dev,
1344 char *page)
1345{
1346 ssize_t len = 0;
1347
6708bb27 1348 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1349 return -ENODEV;
1350
e3d6f909 1351 switch (su_dev->t10_pr.res_type) {
c66ac9db
NB		 1352 case SPC3_PERSISTENT_RESERVATIONS:
1353 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1354 break;
1355 case SPC2_RESERVATIONS:
1356 len = sprintf(page, "SPC2_RESERVATIONS\n");
1357 break;
1358 case SPC_PASSTHROUGH:
1359 len = sprintf(page, "SPC_PASSTHROUGH\n");
1360 break;
1361 default:
1362 len = sprintf(page, "UNKNOWN\n");
1363 break;
1364 }
1365
1366 return len;
1367}
1368
1369SE_DEV_PR_ATTR_RO(res_type);
1370
1371/*
1372 * res_aptpl_active
1373 */
1374
1375static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1376 struct se_subsystem_dev *su_dev,
1377 char *page)
1378{
6708bb27 1379 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1380 return -ENODEV;
1381
e3d6f909 1382 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1383 return 0;
1384
1385 return sprintf(page, "APTPL Bit Status: %s\n",
e3d6f909 1386 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
c66ac9db
NB		 1387}
1388
1389SE_DEV_PR_ATTR_RO(res_aptpl_active);
1390
1391/*
1392 * res_aptpl_metadata
1393 */
1394static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1395 struct se_subsystem_dev *su_dev,
1396 char *page)
1397{
6708bb27 1398 if (!su_dev->se_dev_ptr)
c66ac9db
NB		 1399 return -ENODEV;
1400
e3d6f909 1401 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1402 return 0;
1403
1404 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1405}
1406
1407enum {
1408 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1409 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1410 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1411 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1412};
1413
1414static match_table_t tokens = {
1415 {Opt_initiator_fabric, "initiator_fabric=%s"},
1416 {Opt_initiator_node, "initiator_node=%s"},
1417 {Opt_initiator_sid, "initiator_sid=%s"},
1418 {Opt_sa_res_key, "sa_res_key=%s"},
1419 {Opt_res_holder, "res_holder=%d"},
1420 {Opt_res_type, "res_type=%d"},
1421 {Opt_res_scope, "res_scope=%d"},
1422 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1423 {Opt_mapped_lun, "mapped_lun=%d"},
1424 {Opt_target_fabric, "target_fabric=%s"},
1425 {Opt_target_node, "target_node=%s"},
1426 {Opt_tpgt, "tpgt=%d"},
1427 {Opt_port_rtpi, "port_rtpi=%d"},
1428 {Opt_target_lun, "target_lun=%d"},
1429 {Opt_err, NULL}
1430};
1431
1432static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1433 struct se_subsystem_dev *su_dev,
1434 const char *page,
1435 size_t count)
1436{
1437 struct se_device *dev;
6d180253
JJ		 1438 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1439 unsigned char *t_fabric = NULL, *t_port = NULL;
c66ac9db
NB		 1440 char *orig, *ptr, *arg_p, *opts;
1441 substring_t args[MAX_OPT_ARGS];
1442 unsigned long long tmp_ll;
1443 u64 sa_res_key = 0;
1444 u32 mapped_lun = 0, target_lun = 0;
1445 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1446 u16 port_rpti = 0, tpgt = 0;
1447 u8 type = 0, scope;
1448
1449 dev = su_dev->se_dev_ptr;
6708bb27 1450 if (!dev)
c66ac9db
NB		 1451 return -ENODEV;
1452
e3d6f909 1453 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1454 return 0;
1455
1456 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
6708bb27 1457 pr_debug("Unable to process APTPL metadata while"
c66ac9db
NB		 1458 " active fabric exports exist\n");
1459 return -EINVAL;
1460 }
1461
1462 opts = kstrdup(page, GFP_KERNEL);
1463 if (!opts)
1464 return -ENOMEM;
1465
1466 orig = opts;
1467 while ((ptr = strsep(&opts, ",")) != NULL) {
1468 if (!*ptr)
1469 continue;
1470
1471 token = match_token(ptr, tokens, args);
1472 switch (token) {
1473 case Opt_initiator_fabric:
1474 i_fabric = match_strdup(&args[0]);
6d180253
JJ		 1475 if (!i_fabric) {
1476 ret = -ENOMEM;
1477 goto out;
1478 }
c66ac9db
NB		 1479 break;
1480 case Opt_initiator_node:
1481 i_port = match_strdup(&args[0]);
6d180253
JJ		 1482 if (!i_port) {
1483 ret = -ENOMEM;
1484 goto out;
1485 }
60d645a4 1486 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
6708bb27 1487 pr_err("APTPL metadata initiator_node="
c66ac9db
NB		 1488 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1489 PR_APTPL_MAX_IPORT_LEN);
1490 ret = -EINVAL;
1491 break;
1492 }
1493 break;
1494 case Opt_initiator_sid:
1495 isid = match_strdup(&args[0]);
6d180253
JJ		 1496 if (!isid) {
1497 ret = -ENOMEM;
1498 goto out;
1499 }
60d645a4 1500 if (strlen(isid) >= PR_REG_ISID_LEN) {
6708bb27 1501 pr_err("APTPL metadata initiator_isid"
c66ac9db
NB		 1502 "= exceeds PR_REG_ISID_LEN: %d\n",
1503 PR_REG_ISID_LEN);
1504 ret = -EINVAL;
1505 break;
1506 }
1507 break;
1508 case Opt_sa_res_key:
1509 arg_p = match_strdup(&args[0]);
6d180253
JJ		 1510 if (!arg_p) {
1511 ret = -ENOMEM;
1512 goto out;
1513 }
c66ac9db
NB		 1514 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1515 if (ret < 0) {
6708bb27 1516 pr_err("strict_strtoull() failed for"
c66ac9db
NB		 1517 " sa_res_key=\n");
1518 goto out;
1519 }
1520 sa_res_key = (u64)tmp_ll;
1521 break;
1522 /*
1523 * PR APTPL Metadata for Reservation
1524 */
1525 case Opt_res_holder:
1526 match_int(args, &arg);
1527 res_holder = arg;
1528 break;
1529 case Opt_res_type:
1530 match_int(args, &arg);
1531 type = (u8)arg;
1532 break;
1533 case Opt_res_scope:
1534 match_int(args, &arg);
1535 scope = (u8)arg;
1536 break;
1537 case Opt_res_all_tg_pt:
1538 match_int(args, &arg);
1539 all_tg_pt = (int)arg;
1540 break;
1541 case Opt_mapped_lun:
1542 match_int(args, &arg);
1543 mapped_lun = (u32)arg;
1544 break;
1545 /*
1546 * PR APTPL Metadata for Target Port
1547 */
1548 case Opt_target_fabric:
1549 t_fabric = match_strdup(&args[0]);
6d180253
JJ		 1550 if (!t_fabric) {
1551 ret = -ENOMEM;
1552 goto out;
1553 }
c66ac9db
NB		 1554 break;
1555 case Opt_target_node:
1556 t_port = match_strdup(&args[0]);
6d180253
JJ		 1557 if (!t_port) {
1558 ret = -ENOMEM;
1559 goto out;
1560 }
60d645a4 1561 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
6708bb27 1562 pr_err("APTPL metadata target_node="
c66ac9db
NB		 1563 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1564 PR_APTPL_MAX_TPORT_LEN);
1565 ret = -EINVAL;
1566 break;
1567 }
1568 break;
1569 case Opt_tpgt:
1570 match_int(args, &arg);
1571 tpgt = (u16)arg;
1572 break;
1573 case Opt_port_rtpi:
1574 match_int(args, &arg);
1575 port_rpti = (u16)arg;
1576 break;
1577 case Opt_target_lun:
1578 match_int(args, &arg);
1579 target_lun = (u32)arg;
1580 break;
1581 default:
1582 break;
1583 }
1584 }
1585
6708bb27
AG		 1586 if (!i_port || !t_port || !sa_res_key) {
1587 pr_err("Illegal parameters for APTPL registration\n");
c66ac9db
NB		 1588 ret = -EINVAL;
1589 goto out;
1590 }
1591
1592 if (res_holder && !(type)) {
6708bb27 1593 pr_err("Illegal PR type: 0x%02x for reservation"
c66ac9db
NB		 1594 " holder\n", type);
1595 ret = -EINVAL;
1596 goto out;
1597 }
1598
e3d6f909 1599 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
c66ac9db
NB		 1600 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1601 res_holder, all_tg_pt, type);
1602out:
6d180253
JJ		 1603 kfree(i_fabric);
1604 kfree(i_port);
1605 kfree(isid);
1606 kfree(t_fabric);
1607 kfree(t_port);
c66ac9db
NB		 1608 kfree(orig);
1609 return (ret == 0) ? count : ret;
1610}
1611
1612SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1613
1614CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1615
1616static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1617 &target_core_dev_pr_res_holder.attr,
1618 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1619 &target_core_dev_pr_res_pr_generation.attr,
1620 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1621 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1622 &target_core_dev_pr_res_pr_type.attr,
1623 &target_core_dev_pr_res_type.attr,
1624 &target_core_dev_pr_res_aptpl_active.attr,
1625 &target_core_dev_pr_res_aptpl_metadata.attr,
1626 NULL,
1627};
1628
1629static struct configfs_item_operations target_core_dev_pr_ops = {
1630 .show_attribute = target_core_dev_pr_attr_show,
1631 .store_attribute = target_core_dev_pr_attr_store,
1632};
1633
1634static struct config_item_type target_core_dev_pr_cit = {
1635 .ct_item_ops = &target_core_dev_pr_ops,
1636 .ct_attrs = target_core_dev_pr_attrs,
1637 .ct_owner = THIS_MODULE,
1638};
1639
1640/* End functions for struct config_item_type target_core_dev_pr_cit */
1641
1642/* Start functions for struct config_item_type target_core_dev_cit */
1643
1644static ssize_t target_core_show_dev_info(void *p, char *page)
1645{
1646 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1647 struct se_hba *hba = se_dev->se_dev_hba;
1648 struct se_subsystem_api *t = hba->transport;
1649 int bl = 0;
1650 ssize_t read_bytes = 0;
1651
6708bb27 1652 if (!se_dev->se_dev_ptr)
c66ac9db
NB		 1653 return -ENODEV;
1654
1655 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1656 read_bytes += bl;
1657 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1658 return read_bytes;
1659}
1660
1661static struct target_core_configfs_attribute target_core_attr_dev_info = {
1662 .attr = { .ca_owner = THIS_MODULE,
1663 .ca_name = "info",
1664 .ca_mode = S_IRUGO },
1665 .show = target_core_show_dev_info,
1666 .store = NULL,
1667};
1668
1669static ssize_t target_core_store_dev_control(
1670 void *p,
1671 const char *page,
1672 size_t count)
1673{
1674 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1675 struct se_hba *hba = se_dev->se_dev_hba;
1676 struct se_subsystem_api *t = hba->transport;
1677
6708bb27
AG		 1678 if (!se_dev->se_dev_su_ptr) {
1679 pr_err("Unable to locate struct se_subsystem_dev>se"
c66ac9db
NB		 1680 "_dev_su_ptr\n");
1681 return -EINVAL;
1682 }
1683
1684 return t->set_configfs_dev_params(hba, se_dev, page, count);
1685}
1686
1687static struct target_core_configfs_attribute target_core_attr_dev_control = {
1688 .attr = { .ca_owner = THIS_MODULE,
1689 .ca_name = "control",
1690 .ca_mode = S_IWUSR },
1691 .show = NULL,
1692 .store = target_core_store_dev_control,
1693};
1694
1695static ssize_t target_core_show_dev_alias(void *p, char *page)
1696{
1697 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1698
1699 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1700 return 0;
1701
1702 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1703}
1704
1705static ssize_t target_core_store_dev_alias(
1706 void *p,
1707 const char *page,
1708 size_t count)
1709{
1710 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1711 struct se_hba *hba = se_dev->se_dev_hba;
1712 ssize_t read_bytes;
1713
1714 if (count > (SE_DEV_ALIAS_LEN-1)) {
6708bb27 1715 pr_err("alias count: %d exceeds"
c66ac9db
NB		 1716 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1717 SE_DEV_ALIAS_LEN-1);
1718 return -EINVAL;
1719 }
1720
1721 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1722 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1723 "%s", page);
1724
6708bb27 1725 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
c66ac9db
NB		 1726 config_item_name(&hba->hba_group.cg_item),
1727 config_item_name(&se_dev->se_dev_group.cg_item),
1728 se_dev->se_dev_alias);
1729
1730 return read_bytes;
1731}
1732
1733static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1734 .attr = { .ca_owner = THIS_MODULE,
1735 .ca_name = "alias",
1736 .ca_mode = S_IRUGO | S_IWUSR },
1737 .show = target_core_show_dev_alias,
1738 .store = target_core_store_dev_alias,
1739};
1740
1741static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1742{
1743 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1744
1745 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1746 return 0;
1747
1748 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1749}
1750
1751static ssize_t target_core_store_dev_udev_path(
1752 void *p,
1753 const char *page,
1754 size_t count)
1755{
1756 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1757 struct se_hba *hba = se_dev->se_dev_hba;
1758 ssize_t read_bytes;
1759
1760 if (count > (SE_UDEV_PATH_LEN-1)) {
6708bb27 1761 pr_err("udev_path count: %d exceeds"
c66ac9db
NB		 1762 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1763 SE_UDEV_PATH_LEN-1);
1764 return -EINVAL;
1765 }
1766
1767 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1768 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1769 "%s", page);
1770
6708bb27 1771 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
c66ac9db
NB		 1772 config_item_name(&hba->hba_group.cg_item),
1773 config_item_name(&se_dev->se_dev_group.cg_item),
1774 se_dev->se_dev_udev_path);
1775
1776 return read_bytes;
1777}
1778
1779static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1780 .attr = { .ca_owner = THIS_MODULE,
1781 .ca_name = "udev_path",
1782 .ca_mode = S_IRUGO | S_IWUSR },
1783 .show = target_core_show_dev_udev_path,
1784 .store = target_core_store_dev_udev_path,
1785};
1786
1787static ssize_t target_core_store_dev_enable(
1788 void *p,
1789 const char *page,
1790 size_t count)
1791{
1792 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1793 struct se_device *dev;
1794 struct se_hba *hba = se_dev->se_dev_hba;
1795 struct se_subsystem_api *t = hba->transport;
1796 char *ptr;
1797
1798 ptr = strstr(page, "1");
6708bb27
AG		 1799 if (!ptr) {
1800 pr_err("For dev_enable ops, only valid value"
c66ac9db
NB		 1801 " is \"1\"\n");
1802 return -EINVAL;
1803 }
6708bb27
AG		 1804 if (se_dev->se_dev_ptr) {
1805 pr_err("se_dev->se_dev_ptr already set for storage"
c66ac9db
NB		 1806 " object\n");
1807 return -EEXIST;
1808 }
1809
1810 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1811 return -EINVAL;
1812
1813 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
613640e4
NB		 1814 if (IS_ERR(dev))
1815 return PTR_ERR(dev);
1816 else if (!dev)
c66ac9db
NB		 1817 return -EINVAL;
1818
1819 se_dev->se_dev_ptr = dev;
6708bb27 1820 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
c66ac9db
NB		 1821 " %p\n", se_dev->se_dev_ptr);
1822
1823 return count;
1824}
1825
1826static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1827 .attr = { .ca_owner = THIS_MODULE,
1828 .ca_name = "enable",
1829 .ca_mode = S_IWUSR },
1830 .show = NULL,
1831 .store = target_core_store_dev_enable,
1832};
1833
1834static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1835{
1836 struct se_device *dev;
1837 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1838 struct config_item *lu_ci;
1839 struct t10_alua_lu_gp *lu_gp;
1840 struct t10_alua_lu_gp_member *lu_gp_mem;
1841 ssize_t len = 0;
1842
1843 dev = su_dev->se_dev_ptr;
6708bb27 1844 if (!dev)
c66ac9db
NB		 1845 return -ENODEV;
1846
e3d6f909 1847 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
c66ac9db
NB		 1848 return len;
1849
1850 lu_gp_mem = dev->dev_alua_lu_gp_mem;
6708bb27
AG		 1851 if (!lu_gp_mem) {
1852 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
c66ac9db
NB		 1853 " pointer\n");
1854 return -EINVAL;
1855 }
1856
1857 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1858 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1859 if (lu_gp) {
c66ac9db
NB		 1860 lu_ci = &lu_gp->lu_gp_group.cg_item;
1861 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1862 config_item_name(lu_ci), lu_gp->lu_gp_id);
1863 }
1864 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1865
1866 return len;
1867}
1868
1869static ssize_t target_core_store_alua_lu_gp(
1870 void *p,
1871 const char *page,
1872 size_t count)
1873{
1874 struct se_device *dev;
1875 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1876 struct se_hba *hba = su_dev->se_dev_hba;
1877 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1878 struct t10_alua_lu_gp_member *lu_gp_mem;
1879 unsigned char buf[LU_GROUP_NAME_BUF];
1880 int move = 0;
1881
1882 dev = su_dev->se_dev_ptr;
6708bb27 1883 if (!dev)
c66ac9db
NB		 1884 return -ENODEV;
1885
e3d6f909 1886 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
6708bb27 1887 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
c66ac9db
NB		 1888 config_item_name(&hba->hba_group.cg_item),
1889 config_item_name(&su_dev->se_dev_group.cg_item));
1890 return -EINVAL;
1891 }
1892 if (count > LU_GROUP_NAME_BUF) {
6708bb27 1893 pr_err("ALUA LU Group Alias too large!\n");
c66ac9db
NB		 1894 return -EINVAL;
1895 }
1896 memset(buf, 0, LU_GROUP_NAME_BUF);
1897 memcpy(buf, page, count);
1898 /*
1899 * Any ALUA logical unit alias besides "NULL" means we will be
1900 * making a new group association.
1901 */
1902 if (strcmp(strstrip(buf), "NULL")) {
1903 /*
1904 * core_alua_get_lu_gp_by_name() will increment reference to
1905 * struct t10_alua_lu_gp. This reference is released with
1906 * core_alua_get_lu_gp_by_name below().
1907 */
1908 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
6708bb27 1909 if (!lu_gp_new)
c66ac9db
NB		 1910 return -ENODEV;
1911 }
1912 lu_gp_mem = dev->dev_alua_lu_gp_mem;
6708bb27 1913 if (!lu_gp_mem) {
c66ac9db
NB		 1914 if (lu_gp_new)
1915 core_alua_put_lu_gp_from_name(lu_gp_new);
6708bb27 1916 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
c66ac9db
NB		 1917 " pointer\n");
1918 return -EINVAL;
1919 }
1920
1921 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1922 lu_gp = lu_gp_mem->lu_gp;
6708bb27 1923 if (lu_gp) {
c66ac9db
NB		 1924 /*
1925 * Clearing an existing lu_gp association, and replacing
1926 * with NULL
1927 */
6708bb27
AG		 1928 if (!lu_gp_new) {
1929 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
c66ac9db
NB		 1930 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1931 " %hu\n",
1932 config_item_name(&hba->hba_group.cg_item),
1933 config_item_name(&su_dev->se_dev_group.cg_item),
1934 config_item_name(&lu_gp->lu_gp_group.cg_item),
1935 lu_gp->lu_gp_id);
1936
1937 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1938 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1939
1940 return count;
1941 }
1942 /*
1943 * Removing existing association of lu_gp_mem with lu_gp
1944 */
1945 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1946 move = 1;
1947 }
1948 /*
1949 * Associate lu_gp_mem with lu_gp_new.
1950 */
1951 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1952 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1953
6708bb27 1954 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
c66ac9db
NB		 1955 " core/alua/lu_gps/%s, ID: %hu\n",
1956 (move) ? "Moving" : "Adding",
1957 config_item_name(&hba->hba_group.cg_item),
1958 config_item_name(&su_dev->se_dev_group.cg_item),
1959 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1960 lu_gp_new->lu_gp_id);
1961
1962 core_alua_put_lu_gp_from_name(lu_gp_new);
1963 return count;
1964}
1965
1966static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1967 .attr = { .ca_owner = THIS_MODULE,
1968 .ca_name = "alua_lu_gp",
1969 .ca_mode = S_IRUGO | S_IWUSR },
1970 .show = target_core_show_alua_lu_gp,
1971 .store = target_core_store_alua_lu_gp,
1972};
1973
1974static struct configfs_attribute *lio_core_dev_attrs[] = {
1975 &target_core_attr_dev_info.attr,
1976 &target_core_attr_dev_control.attr,
1977 &target_core_attr_dev_alias.attr,
1978 &target_core_attr_dev_udev_path.attr,
1979 &target_core_attr_dev_enable.attr,
1980 &target_core_attr_dev_alua_lu_gp.attr,
1981 NULL,
1982};
1983
1984static void target_core_dev_release(struct config_item *item)
1985{
1986 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1987 struct se_subsystem_dev, se_dev_group);
1f6fe7cb
NB		 1988 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1989 struct se_subsystem_api *t = hba->transport;
1990 struct config_group *dev_cg = &se_dev->se_dev_group;
c66ac9db 1991
c66ac9db 1992 kfree(dev_cg->default_groups);
1f6fe7cb
NB		 1993 /*
1994 * This pointer will set when the storage is enabled with:
1995 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1996 */
1997 if (se_dev->se_dev_ptr) {
6708bb27 1998 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1f6fe7cb
NB		 1999 "virtual_device() for se_dev_ptr: %p\n",
2000 se_dev->se_dev_ptr);
2001
2002 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2003 } else {
2004 /*
2005 * Release struct se_subsystem_dev->se_dev_su_ptr..
2006 */
6708bb27 2007 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1f6fe7cb
NB		 2008 "device() for se_dev_su_ptr: %p\n",
2009 se_dev->se_dev_su_ptr);
2010
2011 t->free_device(se_dev->se_dev_su_ptr);
2012 }
2013
6708bb27 2014 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
1f6fe7cb
NB		 2015 "_dev_t: %p\n", se_dev);
2016 kfree(se_dev);
c66ac9db
NB		 2017}
2018
2019static ssize_t target_core_dev_show(struct config_item *item,
2020 struct configfs_attribute *attr,
2021 char *page)
2022{
2023 struct se_subsystem_dev *se_dev = container_of(
2024 to_config_group(item), struct se_subsystem_dev,
2025 se_dev_group);
2026 struct target_core_configfs_attribute *tc_attr = container_of(
2027 attr, struct target_core_configfs_attribute, attr);
2028
6708bb27 2029 if (!tc_attr->show)
c66ac9db
NB		 2030 return -EINVAL;
2031
5951146d 2032 return tc_attr->show(se_dev, page);
c66ac9db
NB		 2033}
2034
2035static ssize_t target_core_dev_store(struct config_item *item,
2036 struct configfs_attribute *attr,
2037 const char *page, size_t count)
2038{
2039 struct se_subsystem_dev *se_dev = container_of(
2040 to_config_group(item), struct se_subsystem_dev,
2041 se_dev_group);
2042 struct target_core_configfs_attribute *tc_attr = container_of(
2043 attr, struct target_core_configfs_attribute, attr);
2044
6708bb27 2045 if (!tc_attr->store)
c66ac9db
NB		 2046 return -EINVAL;
2047
5951146d 2048 return tc_attr->store(se_dev, page, count);
c66ac9db
NB		 2049}
2050
2051static struct configfs_item_operations target_core_dev_item_ops = {
2052 .release = target_core_dev_release,
2053 .show_attribute = target_core_dev_show,
2054 .store_attribute = target_core_dev_store,
2055};
2056
2057static struct config_item_type target_core_dev_cit = {
2058 .ct_item_ops = &target_core_dev_item_ops,
2059 .ct_attrs = lio_core_dev_attrs,
2060 .ct_owner = THIS_MODULE,
2061};
2062
2063/* End functions for struct config_item_type target_core_dev_cit */
2064
2065/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2066
2067CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2068#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2069static struct target_core_alua_lu_gp_attribute \
2070 target_core_alua_lu_gp_##_name = \
2071 __CONFIGFS_EATTR(_name, _mode, \
2072 target_core_alua_lu_gp_show_attr_##_name, \
2073 target_core_alua_lu_gp_store_attr_##_name);
2074
2075#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2076static struct target_core_alua_lu_gp_attribute \
2077 target_core_alua_lu_gp_##_name = \
2078 __CONFIGFS_EATTR_RO(_name, \
2079 target_core_alua_lu_gp_show_attr_##_name);
2080
2081/*
2082 * lu_gp_id
2083 */
2084static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2085 struct t10_alua_lu_gp *lu_gp,
2086 char *page)
2087{
6708bb27 2088 if (!lu_gp->lu_gp_valid_id)
c66ac9db
NB		 2089 return 0;
2090
2091 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2092}
2093
2094static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2095 struct t10_alua_lu_gp *lu_gp,
2096 const char *page,
2097 size_t count)
2098{
2099 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2100 unsigned long lu_gp_id;
2101 int ret;
2102
2103 ret = strict_strtoul(page, 0, &lu_gp_id);
2104 if (ret < 0) {
6708bb27 2105 pr_err("strict_strtoul() returned %d for"
c66ac9db
NB		 2106 " lu_gp_id\n", ret);
2107 return -EINVAL;
2108 }
2109 if (lu_gp_id > 0x0000ffff) {
6708bb27 2110 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2111 " 0x0000ffff\n", lu_gp_id);
2112 return -EINVAL;
2113 }
2114
2115 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2116 if (ret < 0)
2117 return -EINVAL;
2118
6708bb27 2119 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
c66ac9db
NB		 2120 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2121 config_item_name(&alua_lu_gp_cg->cg_item),
2122 lu_gp->lu_gp_id);
2123
2124 return count;
2125}
2126
2127SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2128
2129/*
2130 * members
2131 */
2132static ssize_t target_core_alua_lu_gp_show_attr_members(
2133 struct t10_alua_lu_gp *lu_gp,
2134 char *page)
2135{
2136 struct se_device *dev;
2137 struct se_hba *hba;
2138 struct se_subsystem_dev *su_dev;
2139 struct t10_alua_lu_gp_member *lu_gp_mem;
2140 ssize_t len = 0, cur_len;
2141 unsigned char buf[LU_GROUP_NAME_BUF];
2142
2143 memset(buf, 0, LU_GROUP_NAME_BUF);
2144
2145 spin_lock(&lu_gp->lu_gp_lock);
2146 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2147 dev = lu_gp_mem->lu_gp_mem_dev;
2148 su_dev = dev->se_sub_dev;
2149 hba = su_dev->se_dev_hba;
2150
2151 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2152 config_item_name(&hba->hba_group.cg_item),
2153 config_item_name(&su_dev->se_dev_group.cg_item));
2154 cur_len++; /* Extra byte for NULL terminator */
2155
2156 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2157 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2158 "_members buffer\n");
2159 break;
2160 }
2161 memcpy(page+len, buf, cur_len);
2162 len += cur_len;
2163 }
2164 spin_unlock(&lu_gp->lu_gp_lock);
2165
2166 return len;
2167}
2168
2169SE_DEV_ALUA_LU_ATTR_RO(members);
2170
2171CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2172
2173static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2174 &target_core_alua_lu_gp_lu_gp_id.attr,
2175 &target_core_alua_lu_gp_members.attr,
2176 NULL,
2177};
2178
1f6fe7cb
NB		 2179static void target_core_alua_lu_gp_release(struct config_item *item)
2180{
2181 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2182 struct t10_alua_lu_gp, lu_gp_group);
2183
2184 core_alua_free_lu_gp(lu_gp);
2185}
2186
c66ac9db 2187static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1f6fe7cb 2188 .release = target_core_alua_lu_gp_release,
c66ac9db
NB		 2189 .show_attribute = target_core_alua_lu_gp_attr_show,
2190 .store_attribute = target_core_alua_lu_gp_attr_store,
2191};
2192
2193static struct config_item_type target_core_alua_lu_gp_cit = {
2194 .ct_item_ops = &target_core_alua_lu_gp_ops,
2195 .ct_attrs = target_core_alua_lu_gp_attrs,
2196 .ct_owner = THIS_MODULE,
2197};
2198
2199/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2200
2201/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2202
2203static struct config_group *target_core_alua_create_lu_gp(
2204 struct config_group *group,
2205 const char *name)
2206{
2207 struct t10_alua_lu_gp *lu_gp;
2208 struct config_group *alua_lu_gp_cg = NULL;
2209 struct config_item *alua_lu_gp_ci = NULL;
2210
2211 lu_gp = core_alua_allocate_lu_gp(name, 0);
2212 if (IS_ERR(lu_gp))
2213 return NULL;
2214
2215 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2216 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2217
2218 config_group_init_type_name(alua_lu_gp_cg, name,
2219 &target_core_alua_lu_gp_cit);
2220
6708bb27 2221 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
c66ac9db
NB		 2222 " Group: core/alua/lu_gps/%s\n",
2223 config_item_name(alua_lu_gp_ci));
2224
2225 return alua_lu_gp_cg;
2226
2227}
2228
2229static void target_core_alua_drop_lu_gp(
2230 struct config_group *group,
2231 struct config_item *item)
2232{
2233 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2234 struct t10_alua_lu_gp, lu_gp_group);
2235
6708bb27 2236 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
c66ac9db
NB		 2237 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2238 config_item_name(item), lu_gp->lu_gp_id);
1f6fe7cb
NB		 2239 /*
2240 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2241 * -> target_core_alua_lu_gp_release()
2242 */
c66ac9db 2243 config_item_put(item);
c66ac9db
NB		 2244}
2245
2246static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2247 .make_group = &target_core_alua_create_lu_gp,
2248 .drop_item = &target_core_alua_drop_lu_gp,
2249};
2250
2251static struct config_item_type target_core_alua_lu_gps_cit = {
2252 .ct_item_ops = NULL,
2253 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2254 .ct_owner = THIS_MODULE,
2255};
2256
2257/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2258
2259/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2260
2261CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2262#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2263static struct target_core_alua_tg_pt_gp_attribute \
2264 target_core_alua_tg_pt_gp_##_name = \
2265 __CONFIGFS_EATTR(_name, _mode, \
2266 target_core_alua_tg_pt_gp_show_attr_##_name, \
2267 target_core_alua_tg_pt_gp_store_attr_##_name);
2268
2269#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2270static struct target_core_alua_tg_pt_gp_attribute \
2271 target_core_alua_tg_pt_gp_##_name = \
2272 __CONFIGFS_EATTR_RO(_name, \
2273 target_core_alua_tg_pt_gp_show_attr_##_name);
2274
2275/*
2276 * alua_access_state
2277 */
2278static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2279 struct t10_alua_tg_pt_gp *tg_pt_gp,
2280 char *page)
2281{
2282 return sprintf(page, "%d\n",
2283 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2284}
2285
2286static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2287 struct t10_alua_tg_pt_gp *tg_pt_gp,
2288 const char *page,
2289 size_t count)
2290{
2291 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2292 unsigned long tmp;
2293 int new_state, ret;
2294
6708bb27
AG		 2295 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2296 pr_err("Unable to do implict ALUA on non valid"
c66ac9db
NB		 2297 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2298 return -EINVAL;
2299 }
2300
2301 ret = strict_strtoul(page, 0, &tmp);
2302 if (ret < 0) {
6708bb27 2303 pr_err("Unable to extract new ALUA access state from"
c66ac9db
NB		 2304 " %s\n", page);
2305 return -EINVAL;
2306 }
2307 new_state = (int)tmp;
2308
2309 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
6708bb27 2310 pr_err("Unable to process implict configfs ALUA"
c66ac9db
NB		 2311 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2312 return -EINVAL;
2313 }
2314
2315 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2316 NULL, NULL, new_state, 0);
2317 return (!ret) ? count : -EINVAL;
2318}
2319
2320SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2321
2322/*
2323 * alua_access_status
2324 */
2325static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2326 struct t10_alua_tg_pt_gp *tg_pt_gp,
2327 char *page)
2328{
2329 return sprintf(page, "%s\n",
2330 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2331}
2332
2333static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2334 struct t10_alua_tg_pt_gp *tg_pt_gp,
2335 const char *page,
2336 size_t count)
2337{
2338 unsigned long tmp;
2339 int new_status, ret;
2340
6708bb27
AG		 2341 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2342 pr_err("Unable to do set ALUA access status on non"
c66ac9db
NB		 2343 " valid tg_pt_gp ID: %hu\n",
2344 tg_pt_gp->tg_pt_gp_valid_id);
2345 return -EINVAL;
2346 }
2347
2348 ret = strict_strtoul(page, 0, &tmp);
2349 if (ret < 0) {
6708bb27 2350 pr_err("Unable to extract new ALUA access status"
c66ac9db
NB		 2351 " from %s\n", page);
2352 return -EINVAL;
2353 }
2354 new_status = (int)tmp;
2355
2356 if ((new_status != ALUA_STATUS_NONE) &&
2357 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2358 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
6708bb27 2359 pr_err("Illegal ALUA access status: 0x%02x\n",
c66ac9db
NB		 2360 new_status);
2361 return -EINVAL;
2362 }
2363
2364 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2365 return count;
2366}
2367
2368SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2369
2370/*
2371 * alua_access_type
2372 */
2373static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2374 struct t10_alua_tg_pt_gp *tg_pt_gp,
2375 char *page)
2376{
2377 return core_alua_show_access_type(tg_pt_gp, page);
2378}
2379
2380static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2381 struct t10_alua_tg_pt_gp *tg_pt_gp,
2382 const char *page,
2383 size_t count)
2384{
2385 return core_alua_store_access_type(tg_pt_gp, page, count);
2386}
2387
2388SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2389
2390/*
2391 * alua_write_metadata
2392 */
2393static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2394 struct t10_alua_tg_pt_gp *tg_pt_gp,
2395 char *page)
2396{
2397 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2398}
2399
2400static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2401 struct t10_alua_tg_pt_gp *tg_pt_gp,
2402 const char *page,
2403 size_t count)
2404{
2405 unsigned long tmp;
2406 int ret;
2407
2408 ret = strict_strtoul(page, 0, &tmp);
2409 if (ret < 0) {
6708bb27 2410 pr_err("Unable to extract alua_write_metadata\n");
c66ac9db
NB		 2411 return -EINVAL;
2412 }
2413
2414 if ((tmp != 0) && (tmp != 1)) {
6708bb27 2415 pr_err("Illegal value for alua_write_metadata:"
c66ac9db
NB		 2416 " %lu\n", tmp);
2417 return -EINVAL;
2418 }
2419 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2420
2421 return count;
2422}
2423
2424SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2425
2426
2427
2428/*
2429 * nonop_delay_msecs
2430 */
2431static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2432 struct t10_alua_tg_pt_gp *tg_pt_gp,
2433 char *page)
2434{
2435 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2436
2437}
2438
2439static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2440 struct t10_alua_tg_pt_gp *tg_pt_gp,
2441 const char *page,
2442 size_t count)
2443{
2444 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2445}
2446
2447SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2448
2449/*
2450 * trans_delay_msecs
2451 */
2452static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2453 struct t10_alua_tg_pt_gp *tg_pt_gp,
2454 char *page)
2455{
2456 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2457}
2458
2459static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2460 struct t10_alua_tg_pt_gp *tg_pt_gp,
2461 const char *page,
2462 size_t count)
2463{
2464 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2465}
2466
2467SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2468
2469/*
2470 * preferred
2471 */
2472
2473static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2474 struct t10_alua_tg_pt_gp *tg_pt_gp,
2475 char *page)
2476{
2477 return core_alua_show_preferred_bit(tg_pt_gp, page);
2478}
2479
2480static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2481 struct t10_alua_tg_pt_gp *tg_pt_gp,
2482 const char *page,
2483 size_t count)
2484{
2485 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2486}
2487
2488SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2489
2490/*
2491 * tg_pt_gp_id
2492 */
2493static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2494 struct t10_alua_tg_pt_gp *tg_pt_gp,
2495 char *page)
2496{
6708bb27 2497 if (!tg_pt_gp->tg_pt_gp_valid_id)
c66ac9db
NB		 2498 return 0;
2499
2500 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2501}
2502
2503static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2504 struct t10_alua_tg_pt_gp *tg_pt_gp,
2505 const char *page,
2506 size_t count)
2507{
2508 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2509 unsigned long tg_pt_gp_id;
2510 int ret;
2511
2512 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2513 if (ret < 0) {
6708bb27 2514 pr_err("strict_strtoul() returned %d for"
c66ac9db
NB		 2515 " tg_pt_gp_id\n", ret);
2516 return -EINVAL;
2517 }
2518 if (tg_pt_gp_id > 0x0000ffff) {
6708bb27 2519 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
c66ac9db
NB		 2520 " 0x0000ffff\n", tg_pt_gp_id);
2521 return -EINVAL;
2522 }
2523
2524 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2525 if (ret < 0)
2526 return -EINVAL;
2527
6708bb27 2528 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
c66ac9db
NB		 2529 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2530 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2531 tg_pt_gp->tg_pt_gp_id);
2532
2533 return count;
2534}
2535
2536SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2537
2538/*
2539 * members
2540 */
2541static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2542 struct t10_alua_tg_pt_gp *tg_pt_gp,
2543 char *page)
2544{
2545 struct se_port *port;
2546 struct se_portal_group *tpg;
2547 struct se_lun *lun;
2548 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2549 ssize_t len = 0, cur_len;
2550 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2551
2552 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2553
2554 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2555 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2556 tg_pt_gp_mem_list) {
2557 port = tg_pt_gp_mem->tg_pt;
2558 tpg = port->sep_tpg;
2559 lun = port->sep_lun;
2560
2561 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
e3d6f909
AG		 2562 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2563 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2564 tpg->se_tpg_tfo->tpg_get_tag(tpg),
c66ac9db
NB		 2565 config_item_name(&lun->lun_group.cg_item));
2566 cur_len++; /* Extra byte for NULL terminator */
2567
2568 if ((cur_len + len) > PAGE_SIZE) {
6708bb27 2569 pr_warn("Ran out of lu_gp_show_attr"
c66ac9db
NB		 2570 "_members buffer\n");
2571 break;
2572 }
2573 memcpy(page+len, buf, cur_len);
2574 len += cur_len;
2575 }
2576 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2577
2578 return len;
2579}
2580
2581SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2582
2583CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2584 tg_pt_gp_group);
2585
2586static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2587 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2588 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2589 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2590 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2591 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2592 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2593 &target_core_alua_tg_pt_gp_preferred.attr,
2594 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2595 &target_core_alua_tg_pt_gp_members.attr,
2596 NULL,
2597};
2598
1f6fe7cb
NB		 2599static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2600{
2601 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2602 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2603
2604 core_alua_free_tg_pt_gp(tg_pt_gp);
2605}
2606
c66ac9db 2607static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
1f6fe7cb 2608 .release = target_core_alua_tg_pt_gp_release,
c66ac9db
NB		 2609 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2610 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2611};
2612
2613static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2614 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2615 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2616 .ct_owner = THIS_MODULE,
2617};
2618
2619/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2620
2621/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2622
2623static struct config_group *target_core_alua_create_tg_pt_gp(
2624 struct config_group *group,
2625 const char *name)
2626{
2627 struct t10_alua *alua = container_of(group, struct t10_alua,
2628 alua_tg_pt_gps_group);
2629 struct t10_alua_tg_pt_gp *tg_pt_gp;
2630 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2631 struct config_group *alua_tg_pt_gp_cg = NULL;
2632 struct config_item *alua_tg_pt_gp_ci = NULL;
2633
2634 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
6708bb27 2635 if (!tg_pt_gp)
c66ac9db
NB		 2636 return NULL;
2637
2638 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2639 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2640
2641 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2642 &target_core_alua_tg_pt_gp_cit);
2643
6708bb27 2644 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
c66ac9db
NB		 2645 " Group: alua/tg_pt_gps/%s\n",
2646 config_item_name(alua_tg_pt_gp_ci));
2647
2648 return alua_tg_pt_gp_cg;
2649}
2650
2651static void target_core_alua_drop_tg_pt_gp(
2652 struct config_group *group,
2653 struct config_item *item)
2654{
2655 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2656 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2657
6708bb27 2658 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
c66ac9db
NB		 2659 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2660 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
1f6fe7cb
NB		 2661 /*
2662 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2663 * -> target_core_alua_tg_pt_gp_release().
2664 */
c66ac9db 2665 config_item_put(item);
c66ac9db
NB		 2666}
2667
2668static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2669 .make_group = &target_core_alua_create_tg_pt_gp,
2670 .drop_item = &target_core_alua_drop_tg_pt_gp,
2671};
2672
2673static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2674 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2675 .ct_owner = THIS_MODULE,
2676};
2677
2678/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2679
2680/* Start functions for struct config_item_type target_core_alua_cit */
2681
2682/*
2683 * target_core_alua_cit is a ConfigFS group that lives under
2684 * /sys/kernel/config/target/core/alua. There are default groups
2685 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2686 * target_core_alua_cit in target_core_init_configfs() below.
2687 */
2688static struct config_item_type target_core_alua_cit = {
2689 .ct_item_ops = NULL,
2690 .ct_attrs = NULL,
2691 .ct_owner = THIS_MODULE,
2692};
2693
2694/* End functions for struct config_item_type target_core_alua_cit */
2695
12d23384
NB		 2696/* Start functions for struct config_item_type target_core_stat_cit */
2697
2698static struct config_group *target_core_stat_mkdir(
2699 struct config_group *group,
2700 const char *name)
2701{
2702 return ERR_PTR(-ENOSYS);
2703}
2704
2705static void target_core_stat_rmdir(
2706 struct config_group *group,
2707 struct config_item *item)
2708{
2709 return;
2710}
2711
2712static struct configfs_group_operations target_core_stat_group_ops = {
2713 .make_group = &target_core_stat_mkdir,
2714 .drop_item = &target_core_stat_rmdir,
2715};
2716
2717static struct config_item_type target_core_stat_cit = {
2718 .ct_group_ops = &target_core_stat_group_ops,
2719 .ct_owner = THIS_MODULE,
2720};
2721
2722/* End functions for struct config_item_type target_core_stat_cit */
2723
c66ac9db
NB		 2724/* Start functions for struct config_item_type target_core_hba_cit */
2725
2726static struct config_group *target_core_make_subdev(
2727 struct config_group *group,
2728 const char *name)
2729{
2730 struct t10_alua_tg_pt_gp *tg_pt_gp;
2731 struct se_subsystem_dev *se_dev;
2732 struct se_subsystem_api *t;
2733 struct config_item *hba_ci = &group->cg_item;
2734 struct se_hba *hba = item_to_hba(hba_ci);
2735 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
12d23384
NB		 2736 struct config_group *dev_stat_grp = NULL;
2737 int errno = -ENOMEM, ret;
c66ac9db 2738
12d23384
NB		 2739 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2740 if (ret)
2741 return ERR_PTR(ret);
c66ac9db
NB		 2742 /*
2743 * Locate the struct se_subsystem_api from parent's struct se_hba.
2744 */
2745 t = hba->transport;
2746
2747 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2748 if (!se_dev) {
6708bb27 2749 pr_err("Unable to allocate memory for"
c66ac9db
NB		 2750 " struct se_subsystem_dev\n");
2751 goto unlock;
2752 }
e3d6f909 2753 INIT_LIST_HEAD(&se_dev->se_dev_node);
c66ac9db
NB		 2754 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2755 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
e3d6f909
AG		 2756 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2757 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2758 spin_lock_init(&se_dev->t10_pr.registration_lock);
2759 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
c66ac9db
NB		 2760 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2761 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2762 spin_lock_init(&se_dev->se_dev_lock);
e3d6f909 2763 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
c66ac9db
NB		 2764 se_dev->t10_wwn.t10_sub_dev = se_dev;
2765 se_dev->t10_alua.t10_sub_dev = se_dev;
2766 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2767
2768 se_dev->se_dev_hba = hba;
2769 dev_cg = &se_dev->se_dev_group;
2770
12d23384 2771 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
c66ac9db 2772 GFP_KERNEL);
6708bb27 2773 if (!dev_cg->default_groups)
c66ac9db
NB		 2774 goto out;
2775 /*
2776 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2777 * for ->allocate_virtdevice()
2778 *
2779 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2780 * has been called successfully in the next level up in the
2781 * configfs tree for device object's struct config_group.
2782 */
2783 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
6708bb27
AG		 2784 if (!se_dev->se_dev_su_ptr) {
2785 pr_err("Unable to locate subsystem dependent pointer"
c66ac9db
NB		 2786 " from allocate_virtdevice()\n");
2787 goto out;
2788 }
e3d6f909
AG		 2789 spin_lock(&se_device_lock);
2790 list_add_tail(&se_dev->se_dev_node, &se_dev_list);
2791 spin_unlock(&se_device_lock);
c66ac9db
NB		 2792
2793 config_group_init_type_name(&se_dev->se_dev_group, name,
2794 &target_core_dev_cit);
2795 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2796 &target_core_dev_attrib_cit);
2797 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2798 &target_core_dev_pr_cit);
2799 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2800 &target_core_dev_wwn_cit);
2801 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2802 "alua", &target_core_alua_tg_pt_gps_cit);
12d23384
NB		 2803 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2804 "statistics", &target_core_stat_cit);
2805
c66ac9db
NB		 2806 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2807 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2808 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2809 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
12d23384
NB		 2810 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2811 dev_cg->default_groups[5] = NULL;
c66ac9db 2812 /*
12d23384 2813 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
c66ac9db
NB		 2814 */
2815 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
6708bb27 2816 if (!tg_pt_gp)
c66ac9db
NB		 2817 goto out;
2818
e3d6f909 2819 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2820 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2821 GFP_KERNEL);
6708bb27
AG		 2822 if (!tg_pt_gp_cg->default_groups) {
2823 pr_err("Unable to allocate tg_pt_gp_cg->"
c66ac9db
NB		 2824 "default_groups\n");
2825 goto out;
2826 }
2827
2828 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2829 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2830 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2831 tg_pt_gp_cg->default_groups[1] = NULL;
e3d6f909 2832 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
12d23384
NB		 2833 /*
2834 * Add core/$HBA/$DEV/statistics/ default groups
2835 */
e3d6f909 2836 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
12d23384
NB		 2837 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2838 GFP_KERNEL);
2839 if (!dev_stat_grp->default_groups) {
6708bb27 2840 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
12d23384
NB		 2841 goto out;
2842 }
2843 target_stat_setup_dev_default_groups(se_dev);
c66ac9db 2844
6708bb27 2845 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
c66ac9db
NB		 2846 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2847
2848 mutex_unlock(&hba->hba_access_mutex);
2849 return &se_dev->se_dev_group;
2850out:
e3d6f909
AG		 2851 if (se_dev->t10_alua.default_tg_pt_gp) {
2852 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2853 se_dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db 2854 }
12d23384
NB		 2855 if (dev_stat_grp)
2856 kfree(dev_stat_grp->default_groups);
c66ac9db
NB		 2857 if (tg_pt_gp_cg)
2858 kfree(tg_pt_gp_cg->default_groups);
2859 if (dev_cg)
2860 kfree(dev_cg->default_groups);
2861 if (se_dev->se_dev_su_ptr)
2862 t->free_device(se_dev->se_dev_su_ptr);
2863 kfree(se_dev);
2864unlock:
2865 mutex_unlock(&hba->hba_access_mutex);
12d23384 2866 return ERR_PTR(errno);
c66ac9db
NB		 2867}
2868
2869static void target_core_drop_subdev(
2870 struct config_group *group,
2871 struct config_item *item)
2872{
2873 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2874 struct se_subsystem_dev, se_dev_group);
2875 struct se_hba *hba;
2876 struct se_subsystem_api *t;
2877 struct config_item *df_item;
12d23384 2878 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
1f6fe7cb 2879 int i;
c66ac9db
NB		 2880
2881 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2882
1f6fe7cb 2883 mutex_lock(&hba->hba_access_mutex);
c66ac9db
NB		 2884 t = hba->transport;
2885
e3d6f909
AG		 2886 spin_lock(&se_device_lock);
2887 list_del(&se_dev->se_dev_node);
2888 spin_unlock(&se_device_lock);
c66ac9db 2889
e3d6f909 2890 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
12d23384
NB		 2891 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2892 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2893 dev_stat_grp->default_groups[i] = NULL;
2894 config_item_put(df_item);
2895 }
2896 kfree(dev_stat_grp->default_groups);
2897
e3d6f909 2898 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2899 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2900 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2901 tg_pt_gp_cg->default_groups[i] = NULL;
2902 config_item_put(df_item);
2903 }
2904 kfree(tg_pt_gp_cg->default_groups);
1f6fe7cb
NB		 2905 /*
2906 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2907 * directly from target_core_alua_tg_pt_gp_release().
2908 */
e3d6f909 2909 se_dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db
NB		 2910
2911 dev_cg = &se_dev->se_dev_group;
2912 for (i = 0; dev_cg->default_groups[i]; i++) {
2913 df_item = &dev_cg->default_groups[i]->cg_item;
2914 dev_cg->default_groups[i] = NULL;
2915 config_item_put(df_item);
2916 }
c66ac9db 2917 /*
1f6fe7cb
NB		 2918 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2919 * from target_core_dev_item_ops->release() ->target_core_dev_release().
c66ac9db 2920 */
1f6fe7cb 2921 config_item_put(item);
c66ac9db 2922 mutex_unlock(&hba->hba_access_mutex);
c66ac9db
NB		 2923}
2924
2925static struct configfs_group_operations target_core_hba_group_ops = {
2926 .make_group = target_core_make_subdev,
2927 .drop_item = target_core_drop_subdev,
2928};
2929
2930CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2931#define SE_HBA_ATTR(_name, _mode) \
2932static struct target_core_hba_attribute \
2933 target_core_hba_##_name = \
2934 __CONFIGFS_EATTR(_name, _mode, \
2935 target_core_hba_show_attr_##_name, \
2936 target_core_hba_store_attr_##_name);
2937
2938#define SE_HBA_ATTR_RO(_name) \
2939static struct target_core_hba_attribute \
2940 target_core_hba_##_name = \
2941 __CONFIGFS_EATTR_RO(_name, \
2942 target_core_hba_show_attr_##_name);
2943
2944static ssize_t target_core_hba_show_attr_hba_info(
2945 struct se_hba *hba,
2946 char *page)
2947{
2948 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2949 hba->hba_id, hba->transport->name,
2950 TARGET_CORE_CONFIGFS_VERSION);
2951}
2952
2953SE_HBA_ATTR_RO(hba_info);
2954
2955static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2956 char *page)
2957{
2958 int hba_mode = 0;
2959
2960 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2961 hba_mode = 1;
2962
2963 return sprintf(page, "%d\n", hba_mode);
2964}
2965
2966static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2967 const char *page, size_t count)
2968{
2969 struct se_subsystem_api *transport = hba->transport;
2970 unsigned long mode_flag;
2971 int ret;
2972
2973 if (transport->pmode_enable_hba == NULL)
2974 return -EINVAL;
2975
2976 ret = strict_strtoul(page, 0, &mode_flag);
2977 if (ret < 0) {
6708bb27 2978 pr_err("Unable to extract hba mode flag: %d\n", ret);
c66ac9db
NB		 2979 return -EINVAL;
2980 }
2981
2982 spin_lock(&hba->device_lock);
6708bb27
AG		 2983 if (!list_empty(&hba->hba_dev_list)) {
2984 pr_err("Unable to set hba_mode with active devices\n");
c66ac9db
NB		 2985 spin_unlock(&hba->device_lock);
2986 return -EINVAL;
2987 }
2988 spin_unlock(&hba->device_lock);
2989
2990 ret = transport->pmode_enable_hba(hba, mode_flag);
2991 if (ret < 0)
2992 return -EINVAL;
2993 if (ret > 0)
2994 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2995 else if (ret == 0)
2996 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2997
2998 return count;
2999}
3000
3001SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3002
3003CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3004
1f6fe7cb
NB		 3005static void target_core_hba_release(struct config_item *item)
3006{
3007 struct se_hba *hba = container_of(to_config_group(item),
3008 struct se_hba, hba_group);
3009 core_delete_hba(hba);
3010}
3011
c66ac9db
NB		 3012static struct configfs_attribute *target_core_hba_attrs[] = {
3013 &target_core_hba_hba_info.attr,
3014 &target_core_hba_hba_mode.attr,
3015 NULL,
3016};
3017
3018static struct configfs_item_operations target_core_hba_item_ops = {
1f6fe7cb 3019 .release = target_core_hba_release,
c66ac9db
NB		 3020 .show_attribute = target_core_hba_attr_show,
3021 .store_attribute = target_core_hba_attr_store,
3022};
3023
3024static struct config_item_type target_core_hba_cit = {
3025 .ct_item_ops = &target_core_hba_item_ops,
3026 .ct_group_ops = &target_core_hba_group_ops,
3027 .ct_attrs = target_core_hba_attrs,
3028 .ct_owner = THIS_MODULE,
3029};
3030
3031static struct config_group *target_core_call_addhbatotarget(
3032 struct config_group *group,
3033 const char *name)
3034{
3035 char *se_plugin_str, *str, *str2;
3036 struct se_hba *hba;
3037 char buf[TARGET_CORE_NAME_MAX_LEN];
3038 unsigned long plugin_dep_id = 0;
3039 int ret;
3040
3041 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
60d645a4 3042 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
6708bb27 3043 pr_err("Passed *name strlen(): %d exceeds"
c66ac9db
NB		 3044 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3045 TARGET_CORE_NAME_MAX_LEN);
3046 return ERR_PTR(-ENAMETOOLONG);
3047 }
3048 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3049
3050 str = strstr(buf, "_");
6708bb27
AG		 3051 if (!str) {
3052 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
c66ac9db
NB		 3053 return ERR_PTR(-EINVAL);
3054 }
3055 se_plugin_str = buf;
3056 /*
3057 * Special case for subsystem plugins that have "_" in their names.
3058 * Namely rd_direct and rd_mcp..
3059 */
3060 str2 = strstr(str+1, "_");
6708bb27 3061 if (str2) {
c66ac9db
NB		 3062 *str2 = '\0'; /* Terminate for *se_plugin_str */
3063 str2++; /* Skip to start of plugin dependent ID */
3064 str = str2;
3065 } else {
3066 *str = '\0'; /* Terminate for *se_plugin_str */
3067 str++; /* Skip to start of plugin dependent ID */
3068 }
3069
3070 ret = strict_strtoul(str, 0, &plugin_dep_id);
3071 if (ret < 0) {
6708bb27 3072 pr_err("strict_strtoul() returned %d for"
c66ac9db
NB		 3073 " plugin_dep_id\n", ret);
3074 return ERR_PTR(-EINVAL);
3075 }
3076 /*
3077 * Load up TCM subsystem plugins if they have not already been loaded.
3078 */
3079 if (transport_subsystem_check_init() < 0)
3080 return ERR_PTR(-EINVAL);
3081
3082 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3083 if (IS_ERR(hba))
3084 return ERR_CAST(hba);
3085
3086 config_group_init_type_name(&hba->hba_group, name,
3087 &target_core_hba_cit);
3088
3089 return &hba->hba_group;
3090}
3091
3092static void target_core_call_delhbafromtarget(
3093 struct config_group *group,
3094 struct config_item *item)
3095{
1f6fe7cb
NB		 3096 /*
3097 * core_delete_hba() is called from target_core_hba_item_ops->release()
3098 * -> target_core_hba_release()
3099 */
c66ac9db 3100 config_item_put(item);
c66ac9db
NB		 3101}
3102
3103static struct configfs_group_operations target_core_group_ops = {
3104 .make_group = target_core_call_addhbatotarget,
3105 .drop_item = target_core_call_delhbafromtarget,
3106};
3107
3108static struct config_item_type target_core_cit = {
3109 .ct_item_ops = NULL,
3110 .ct_group_ops = &target_core_group_ops,
3111 .ct_attrs = NULL,
3112 .ct_owner = THIS_MODULE,
3113};
3114
3115/* Stop functions for struct config_item_type target_core_hba_cit */
3116
54550fab 3117static int __init target_core_init_configfs(void)
c66ac9db
NB		 3118{
3119 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3120 struct config_group *lu_gp_cg = NULL;
3121 struct configfs_subsystem *subsys;
c66ac9db
NB		 3122 struct t10_alua_lu_gp *lu_gp;
3123 int ret;
3124
6708bb27 3125 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
c66ac9db
NB		 3126 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3127 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3128
3129 subsys = target_core_subsystem[0];
3130 config_group_init(&subsys->su_group);
3131 mutex_init(&subsys->su_mutex);
3132
3133 INIT_LIST_HEAD(&g_tf_list);
3134 mutex_init(&g_tf_lock);
e3d6f909 3135 ret = init_se_kmem_caches();
c66ac9db 3136 if (ret < 0)
e3d6f909 3137 return ret;
c66ac9db
NB		 3138 /*
3139 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3140 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3141 */
3142 target_cg = &subsys->su_group;
3143 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3144 GFP_KERNEL);
6708bb27
AG		 3145 if (!target_cg->default_groups) {
3146 pr_err("Unable to allocate target_cg->default_groups\n");
c66ac9db
NB		 3147 goto out_global;
3148 }
3149
e3d6f909 3150 config_group_init_type_name(&target_core_hbagroup,
c66ac9db 3151 "core", &target_core_cit);
e3d6f909 3152 target_cg->default_groups[0] = &target_core_hbagroup;
c66ac9db
NB		 3153 target_cg->default_groups[1] = NULL;
3154 /*
3155 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3156 */
e3d6f909 3157 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3158 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3159 GFP_KERNEL);
6708bb27
AG		 3160 if (!hba_cg->default_groups) {
3161 pr_err("Unable to allocate hba_cg->default_groups\n");
c66ac9db
NB		 3162 goto out_global;
3163 }
e3d6f909 3164 config_group_init_type_name(&alua_group,
c66ac9db 3165 "alua", &target_core_alua_cit);
e3d6f909 3166 hba_cg->default_groups[0] = &alua_group;
c66ac9db
NB		 3167 hba_cg->default_groups[1] = NULL;
3168 /*
3169 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3170 * groups under /sys/kernel/config/target/core/alua/
3171 */
e3d6f909 3172 alua_cg = &alua_group;
c66ac9db
NB		 3173 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3174 GFP_KERNEL);
6708bb27
AG		 3175 if (!alua_cg->default_groups) {
3176 pr_err("Unable to allocate alua_cg->default_groups\n");
c66ac9db
NB		 3177 goto out_global;
3178 }
3179
e3d6f909 3180 config_group_init_type_name(&alua_lu_gps_group,
c66ac9db 3181 "lu_gps", &target_core_alua_lu_gps_cit);
e3d6f909 3182 alua_cg->default_groups[0] = &alua_lu_gps_group;
c66ac9db
NB		 3183 alua_cg->default_groups[1] = NULL;
3184 /*
3185 * Add core/alua/lu_gps/default_lu_gp
3186 */
3187 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3188 if (IS_ERR(lu_gp))
3189 goto out_global;
3190
e3d6f909 3191 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3192 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3193 GFP_KERNEL);
6708bb27
AG		 3194 if (!lu_gp_cg->default_groups) {
3195 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
c66ac9db
NB		 3196 goto out_global;
3197 }
3198
3199 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3200 &target_core_alua_lu_gp_cit);
3201 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3202 lu_gp_cg->default_groups[1] = NULL;
e3d6f909 3203 default_lu_gp = lu_gp;
c66ac9db
NB		 3204 /*
3205 * Register the target_core_mod subsystem with configfs.
3206 */
3207 ret = configfs_register_subsystem(subsys);
3208 if (ret < 0) {
6708bb27 3209 pr_err("Error %d while registering subsystem %s\n",
c66ac9db
NB		 3210 ret, subsys->su_group.cg_item.ci_namebuf);
3211 goto out_global;
3212 }
6708bb27 3213 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
c66ac9db
NB		 3214 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3215 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3216 /*
3217 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3218 */
3219 ret = rd_module_init();
3220 if (ret < 0)
3221 goto out;
3222
3223 if (core_dev_setup_virtual_lun0() < 0)
3224 goto out;
3225
c66ac9db
NB		 3226 return 0;
3227
3228out:
3229 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3230 core_dev_release_virtual_lun0();
3231 rd_module_exit();
3232out_global:
e3d6f909
AG		 3233 if (default_lu_gp) {
3234 core_alua_free_lu_gp(default_lu_gp);
3235 default_lu_gp = NULL;
c66ac9db
NB		 3236 }
3237 if (lu_gp_cg)
3238 kfree(lu_gp_cg->default_groups);
3239 if (alua_cg)
3240 kfree(alua_cg->default_groups);
3241 if (hba_cg)
3242 kfree(hba_cg->default_groups);
3243 kfree(target_cg->default_groups);
e3d6f909
AG		 3244 release_se_kmem_caches();
3245 return ret;
c66ac9db
NB		 3246}
3247
54550fab 3248static void __exit target_core_exit_configfs(void)
c66ac9db
NB		 3249{
3250 struct configfs_subsystem *subsys;
3251 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3252 struct config_item *item;
3253 int i;
3254
c66ac9db
NB		 3255 subsys = target_core_subsystem[0];
3256
e3d6f909 3257 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3258 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3259 item = &lu_gp_cg->default_groups[i]->cg_item;
3260 lu_gp_cg->default_groups[i] = NULL;
3261 config_item_put(item);
3262 }
3263 kfree(lu_gp_cg->default_groups);
7c2bf6e9 3264 lu_gp_cg->default_groups = NULL;
c66ac9db 3265
e3d6f909 3266 alua_cg = &alua_group;
c66ac9db
NB		 3267 for (i = 0; alua_cg->default_groups[i]; i++) {
3268 item = &alua_cg->default_groups[i]->cg_item;
3269 alua_cg->default_groups[i] = NULL;
3270 config_item_put(item);
3271 }
3272 kfree(alua_cg->default_groups);
7c2bf6e9 3273 alua_cg->default_groups = NULL;
c66ac9db 3274
e3d6f909 3275 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3276 for (i = 0; hba_cg->default_groups[i]; i++) {
3277 item = &hba_cg->default_groups[i]->cg_item;
3278 hba_cg->default_groups[i] = NULL;
3279 config_item_put(item);
3280 }
3281 kfree(hba_cg->default_groups);
7c2bf6e9
NB		 3282 hba_cg->default_groups = NULL;
3283 /*
3284 * We expect subsys->su_group.default_groups to be released
3285 * by configfs subsystem provider logic..
3286 */
3287 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3288 kfree(subsys->su_group.default_groups);
3289
e3d6f909
AG		 3290 core_alua_free_lu_gp(default_lu_gp);
3291 default_lu_gp = NULL;
7c2bf6e9 3292
6708bb27 3293 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
c66ac9db
NB		 3294 " Infrastructure\n");
3295
c66ac9db
NB		 3296 core_dev_release_virtual_lun0();
3297 rd_module_exit();
e3d6f909 3298 release_se_kmem_caches();
c66ac9db
NB		 3299}
3300
3301MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3302MODULE_AUTHOR("nab@Linux-iSCSI.org");
3303MODULE_LICENSE("GPL");
3304
3305module_init(target_core_init_configfs);
3306module_exit(target_core_exit_configfs);
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