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target: Core cleanups from AGrover (round 1)
[deliverable/linux.git] / drivers / target / target_core_configfs.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
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
107 if (!(name))
108 return NULL;
109
110 mutex_lock(&g_tf_lock);
111 list_for_each_entry(tf, &g_tf_list, tf_list) {
112 if (!(strcmp(tf->tf_name, name))) {
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
133 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
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 */
153 if (!(strncmp(name, "iscsi", 5))) {
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) {
162 printk(KERN_ERR "request_module() failed for"
163 " iscsi_target_mod.ko: %d\n", ret);
164 return ERR_PTR(-EINVAL);
165 }
166 } else if (!(strncmp(name, "loopback", 8))) {
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) {
175 printk(KERN_ERR "request_module() failed for"
176 " tcm_loop.ko: %d\n", ret);
177 return ERR_PTR(-EINVAL);
178 }
179 }
180
181 tf = target_core_get_fabric(name);
182 if (!(tf)) {
183 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
184 name);
185 return ERR_PTR(-EINVAL);
186 }
187 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
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 */
193 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
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
205 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
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;
212 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
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
231 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
232 " tf list\n", config_item_name(item));
233
234 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
235 " %s\n", tf->tf_name);
236 atomic_dec(&tf->tf_access_cnt);
237
238 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
239 " tf->tf_fabric for %s\n", tf->tf_name);
240 tf->tf_fabric = NULL;
241
242 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
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
309 if (!(fabric_mod)) {
310 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
e3d6f909 311 return ERR_PTR(-EINVAL);
c66ac9db
NB		 312 }
313 if (!(name)) {
314 printk(KERN_ERR "Unable to locate passed fabric name\n");
e3d6f909 315 return ERR_PTR(-EINVAL);
c66ac9db 316 }
60d645a4 317 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
c66ac9db
NB		 318 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
319 "_NAME_SIZE\n", name);
e3d6f909 320 return ERR_PTR(-EINVAL);
c66ac9db
NB		 321 }
322
323 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
324 if (!(tf))
e3d6f909 325 return ERR_PTR(-ENOMEM);
c66ac9db
NB		 326
327 INIT_LIST_HEAD(&tf->tf_list);
328 atomic_set(&tf->tf_access_cnt, 0);
329 /*
330 * Setup the default generic struct config_item_type's (cits) in
331 * struct target_fabric_configfs->tf_cit_tmpl
332 */
333 tf->tf_module = fabric_mod;
334 target_fabric_setup_cits(tf);
335
336 tf->tf_subsys = target_core_subsystem[0];
337 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
338
339 mutex_lock(&g_tf_lock);
340 list_add_tail(&tf->tf_list, &g_tf_list);
341 mutex_unlock(&g_tf_lock);
342
343 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
344 ">>>>>>>>>>>>>>\n");
345 printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
346 " %s\n", tf, tf->tf_name);
347 return tf;
348}
349EXPORT_SYMBOL(target_fabric_configfs_init);
350
351/*
352 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
353 */
354void target_fabric_configfs_free(
355 struct target_fabric_configfs *tf)
356{
357 mutex_lock(&g_tf_lock);
358 list_del(&tf->tf_list);
359 mutex_unlock(&g_tf_lock);
360
361 kfree(tf);
362}
363EXPORT_SYMBOL(target_fabric_configfs_free);
364
365/*
366 * Perform a sanity check of the passed tf->tf_ops before completing
367 * TCM fabric module registration.
368 */
369static int target_fabric_tf_ops_check(
370 struct target_fabric_configfs *tf)
371{
372 struct target_core_fabric_ops *tfo = &tf->tf_ops;
373
374 if (!(tfo->get_fabric_name)) {
375 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
376 return -EINVAL;
377 }
378 if (!(tfo->get_fabric_proto_ident)) {
379 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
380 return -EINVAL;
381 }
382 if (!(tfo->tpg_get_wwn)) {
383 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
384 return -EINVAL;
385 }
386 if (!(tfo->tpg_get_tag)) {
387 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
388 return -EINVAL;
389 }
390 if (!(tfo->tpg_get_default_depth)) {
391 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
392 return -EINVAL;
393 }
394 if (!(tfo->tpg_get_pr_transport_id)) {
395 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
396 return -EINVAL;
397 }
398 if (!(tfo->tpg_get_pr_transport_id_len)) {
399 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
400 return -EINVAL;
401 }
402 if (!(tfo->tpg_check_demo_mode)) {
403 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
404 return -EINVAL;
405 }
406 if (!(tfo->tpg_check_demo_mode_cache)) {
407 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
408 return -EINVAL;
409 }
410 if (!(tfo->tpg_check_demo_mode_write_protect)) {
411 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
412 return -EINVAL;
413 }
414 if (!(tfo->tpg_check_prod_mode_write_protect)) {
415 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
416 return -EINVAL;
417 }
418 if (!(tfo->tpg_alloc_fabric_acl)) {
419 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
420 return -EINVAL;
421 }
422 if (!(tfo->tpg_release_fabric_acl)) {
423 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
424 return -EINVAL;
425 }
426 if (!(tfo->tpg_get_inst_index)) {
427 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
428 return -EINVAL;
429 }
430 if (!(tfo->release_cmd_to_pool)) {
431 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
432 return -EINVAL;
433 }
434 if (!(tfo->release_cmd_direct)) {
435 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
436 return -EINVAL;
437 }
438 if (!(tfo->shutdown_session)) {
439 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
440 return -EINVAL;
441 }
442 if (!(tfo->close_session)) {
443 printk(KERN_ERR "Missing tfo->close_session()\n");
444 return -EINVAL;
445 }
446 if (!(tfo->stop_session)) {
447 printk(KERN_ERR "Missing tfo->stop_session()\n");
448 return -EINVAL;
449 }
450 if (!(tfo->fall_back_to_erl0)) {
451 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
452 return -EINVAL;
453 }
454 if (!(tfo->sess_logged_in)) {
455 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
456 return -EINVAL;
457 }
458 if (!(tfo->sess_get_index)) {
459 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
460 return -EINVAL;
461 }
462 if (!(tfo->write_pending)) {
463 printk(KERN_ERR "Missing tfo->write_pending()\n");
464 return -EINVAL;
465 }
466 if (!(tfo->write_pending_status)) {
467 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
468 return -EINVAL;
469 }
470 if (!(tfo->set_default_node_attributes)) {
471 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
472 return -EINVAL;
473 }
474 if (!(tfo->get_task_tag)) {
475 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
476 return -EINVAL;
477 }
478 if (!(tfo->get_cmd_state)) {
479 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
480 return -EINVAL;
481 }
482 if (!(tfo->new_cmd_failure)) {
483 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
484 return -EINVAL;
485 }
486 if (!(tfo->queue_data_in)) {
487 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
488 return -EINVAL;
489 }
490 if (!(tfo->queue_status)) {
491 printk(KERN_ERR "Missing tfo->queue_status()\n");
492 return -EINVAL;
493 }
494 if (!(tfo->queue_tm_rsp)) {
495 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
496 return -EINVAL;
497 }
498 if (!(tfo->set_fabric_sense_len)) {
499 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
500 return -EINVAL;
501 }
502 if (!(tfo->get_fabric_sense_len)) {
503 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
504 return -EINVAL;
505 }
506 if (!(tfo->is_state_remove)) {
507 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
508 return -EINVAL;
509 }
c66ac9db
NB		 510 /*
511 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
512 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
513 * target_core_fabric_configfs.c WWN+TPG group context code.
514 */
515 if (!(tfo->fabric_make_wwn)) {
516 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
517 return -EINVAL;
518 }
519 if (!(tfo->fabric_drop_wwn)) {
520 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
521 return -EINVAL;
522 }
523 if (!(tfo->fabric_make_tpg)) {
524 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
525 return -EINVAL;
526 }
527 if (!(tfo->fabric_drop_tpg)) {
528 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
529 return -EINVAL;
530 }
531
532 return 0;
533}
534
535/*
536 * Called 2nd from fabric module with returned parameter of
537 * struct target_fabric_configfs * from target_fabric_configfs_init().
538 *
539 * Upon a successful registration, the new fabric's struct config_item is
540 * return. Also, a pointer to this struct is set in the passed
541 * struct target_fabric_configfs.
542 */
543int target_fabric_configfs_register(
544 struct target_fabric_configfs *tf)
545{
c66ac9db
NB		 546 int ret;
547
548 if (!(tf)) {
549 printk(KERN_ERR "Unable to locate target_fabric_configfs"
550 " pointer\n");
551 return -EINVAL;
552 }
553 if (!(tf->tf_subsys)) {
554 printk(KERN_ERR "Unable to target struct config_subsystem"
555 " pointer\n");
556 return -EINVAL;
557 }
c66ac9db
NB		 558 ret = target_fabric_tf_ops_check(tf);
559 if (ret < 0)
560 return ret;
561
562 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
563 ">>>>>>>>>>\n");
564 return 0;
565}
566EXPORT_SYMBOL(target_fabric_configfs_register);
567
568void target_fabric_configfs_deregister(
569 struct target_fabric_configfs *tf)
570{
c66ac9db
NB		 571 struct configfs_subsystem *su;
572
573 if (!(tf)) {
574 printk(KERN_ERR "Unable to locate passed target_fabric_"
575 "configfs\n");
576 return;
577 }
578 su = tf->tf_subsys;
579 if (!(su)) {
580 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
581 " pointer\n");
582 return;
583 }
c66ac9db
NB		 584 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
585 ">>>>>>>>>>>>\n");
586 mutex_lock(&g_tf_lock);
587 if (atomic_read(&tf->tf_access_cnt)) {
588 mutex_unlock(&g_tf_lock);
589 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
590 tf->tf_name);
591 BUG();
592 }
593 list_del(&tf->tf_list);
594 mutex_unlock(&g_tf_lock);
595
596 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
597 " %s\n", tf->tf_name);
598 tf->tf_module = NULL;
599 tf->tf_subsys = NULL;
600 kfree(tf);
601
602 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
603 ">>>>>\n");
c66ac9db
NB		 604}
605EXPORT_SYMBOL(target_fabric_configfs_deregister);
606
607/*##############################################################################
608// Stop functions called by external Target Fabrics Modules
609//############################################################################*/
610
611/* Start functions for struct config_item_type target_core_dev_attrib_cit */
612
613#define DEF_DEV_ATTRIB_SHOW(_name) \
614static ssize_t target_core_dev_show_attr_##_name( \
615 struct se_dev_attrib *da, \
616 char *page) \
617{ \
618 struct se_device *dev; \
619 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
620 ssize_t rb; \
621 \
622 spin_lock(&se_dev->se_dev_lock); \
623 dev = se_dev->se_dev_ptr; \
624 if (!(dev)) { \
625 spin_unlock(&se_dev->se_dev_lock); \
626 return -ENODEV; \
627 } \
e3d6f909
AG		 628 rb = snprintf(page, PAGE_SIZE, "%u\n", \
629 (u32)dev->se_sub_dev->se_dev_attrib._name); \
c66ac9db
NB		 630 spin_unlock(&se_dev->se_dev_lock); \
631 \
632 return rb; \
633}
634
635#define DEF_DEV_ATTRIB_STORE(_name) \
636static ssize_t target_core_dev_store_attr_##_name( \
637 struct se_dev_attrib *da, \
638 const char *page, \
639 size_t count) \
640{ \
641 struct se_device *dev; \
642 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
643 unsigned long val; \
644 int ret; \
645 \
646 spin_lock(&se_dev->se_dev_lock); \
647 dev = se_dev->se_dev_ptr; \
648 if (!(dev)) { \
649 spin_unlock(&se_dev->se_dev_lock); \
650 return -ENODEV; \
651 } \
652 ret = strict_strtoul(page, 0, &val); \
653 if (ret < 0) { \
654 spin_unlock(&se_dev->se_dev_lock); \
655 printk(KERN_ERR "strict_strtoul() failed with" \
656 " ret: %d\n", ret); \
657 return -EINVAL; \
658 } \
659 ret = se_dev_set_##_name(dev, (u32)val); \
660 spin_unlock(&se_dev->se_dev_lock); \
661 \
662 return (!ret) ? count : -EINVAL; \
663}
664
665#define DEF_DEV_ATTRIB(_name) \
666DEF_DEV_ATTRIB_SHOW(_name); \
667DEF_DEV_ATTRIB_STORE(_name);
668
669#define DEF_DEV_ATTRIB_RO(_name) \
670DEF_DEV_ATTRIB_SHOW(_name);
671
672CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
673#define SE_DEV_ATTR(_name, _mode) \
674static struct target_core_dev_attrib_attribute \
675 target_core_dev_attrib_##_name = \
676 __CONFIGFS_EATTR(_name, _mode, \
677 target_core_dev_show_attr_##_name, \
678 target_core_dev_store_attr_##_name);
679
680#define SE_DEV_ATTR_RO(_name); \
681static struct target_core_dev_attrib_attribute \
682 target_core_dev_attrib_##_name = \
683 __CONFIGFS_EATTR_RO(_name, \
684 target_core_dev_show_attr_##_name);
685
686DEF_DEV_ATTRIB(emulate_dpo);
687SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
688
689DEF_DEV_ATTRIB(emulate_fua_write);
690SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
691
692DEF_DEV_ATTRIB(emulate_fua_read);
693SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
694
695DEF_DEV_ATTRIB(emulate_write_cache);
696SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
697
698DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
699SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
700
701DEF_DEV_ATTRIB(emulate_tas);
702SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
703
704DEF_DEV_ATTRIB(emulate_tpu);
705SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
706
707DEF_DEV_ATTRIB(emulate_tpws);
708SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
709
710DEF_DEV_ATTRIB(enforce_pr_isids);
711SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
712
713DEF_DEV_ATTRIB_RO(hw_block_size);
714SE_DEV_ATTR_RO(hw_block_size);
715
716DEF_DEV_ATTRIB(block_size);
717SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
718
719DEF_DEV_ATTRIB_RO(hw_max_sectors);
720SE_DEV_ATTR_RO(hw_max_sectors);
721
722DEF_DEV_ATTRIB(max_sectors);
723SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
724
725DEF_DEV_ATTRIB(optimal_sectors);
726SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
727
728DEF_DEV_ATTRIB_RO(hw_queue_depth);
729SE_DEV_ATTR_RO(hw_queue_depth);
730
731DEF_DEV_ATTRIB(queue_depth);
732SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
733
734DEF_DEV_ATTRIB(task_timeout);
735SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
736
737DEF_DEV_ATTRIB(max_unmap_lba_count);
738SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
739
740DEF_DEV_ATTRIB(max_unmap_block_desc_count);
741SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
742
743DEF_DEV_ATTRIB(unmap_granularity);
744SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
745
746DEF_DEV_ATTRIB(unmap_granularity_alignment);
747SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
748
749CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
750
751static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
752 &target_core_dev_attrib_emulate_dpo.attr,
753 &target_core_dev_attrib_emulate_fua_write.attr,
754 &target_core_dev_attrib_emulate_fua_read.attr,
755 &target_core_dev_attrib_emulate_write_cache.attr,
756 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
757 &target_core_dev_attrib_emulate_tas.attr,
758 &target_core_dev_attrib_emulate_tpu.attr,
759 &target_core_dev_attrib_emulate_tpws.attr,
760 &target_core_dev_attrib_enforce_pr_isids.attr,
761 &target_core_dev_attrib_hw_block_size.attr,
762 &target_core_dev_attrib_block_size.attr,
763 &target_core_dev_attrib_hw_max_sectors.attr,
764 &target_core_dev_attrib_max_sectors.attr,
765 &target_core_dev_attrib_optimal_sectors.attr,
766 &target_core_dev_attrib_hw_queue_depth.attr,
767 &target_core_dev_attrib_queue_depth.attr,
768 &target_core_dev_attrib_task_timeout.attr,
769 &target_core_dev_attrib_max_unmap_lba_count.attr,
770 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
771 &target_core_dev_attrib_unmap_granularity.attr,
772 &target_core_dev_attrib_unmap_granularity_alignment.attr,
773 NULL,
774};
775
776static struct configfs_item_operations target_core_dev_attrib_ops = {
777 .show_attribute = target_core_dev_attrib_attr_show,
778 .store_attribute = target_core_dev_attrib_attr_store,
779};
780
781static struct config_item_type target_core_dev_attrib_cit = {
782 .ct_item_ops = &target_core_dev_attrib_ops,
783 .ct_attrs = target_core_dev_attrib_attrs,
784 .ct_owner = THIS_MODULE,
785};
786
787/* End functions for struct config_item_type target_core_dev_attrib_cit */
788
789/* Start functions for struct config_item_type target_core_dev_wwn_cit */
790
791CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
792#define SE_DEV_WWN_ATTR(_name, _mode) \
793static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
794 __CONFIGFS_EATTR(_name, _mode, \
795 target_core_dev_wwn_show_attr_##_name, \
796 target_core_dev_wwn_store_attr_##_name);
797
798#define SE_DEV_WWN_ATTR_RO(_name); \
799do { \
800 static struct target_core_dev_wwn_attribute \
801 target_core_dev_wwn_##_name = \
802 __CONFIGFS_EATTR_RO(_name, \
803 target_core_dev_wwn_show_attr_##_name); \
804} while (0);
805
806/*
807 * VPD page 0x80 Unit serial
808 */
809static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
810 struct t10_wwn *t10_wwn,
811 char *page)
812{
813 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
814 struct se_device *dev;
815
816 dev = se_dev->se_dev_ptr;
817 if (!(dev))
818 return -ENODEV;
819
820 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
821 &t10_wwn->unit_serial[0]);
822}
823
824static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
825 struct t10_wwn *t10_wwn,
826 const char *page,
827 size_t count)
828{
829 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
830 struct se_device *dev;
831 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
832
833 /*
834 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
835 * from the struct scsi_device level firmware, do not allow
836 * VPD Unit Serial to be emulated.
837 *
838 * Note this struct scsi_device could also be emulating VPD
839 * information from its drivers/scsi LLD. But for now we assume
840 * it is doing 'the right thing' wrt a world wide unique
841 * VPD Unit Serial Number that OS dependent multipath can depend on.
842 */
843 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
844 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
845 " Unit Serial, ignoring request\n");
846 return -EOPNOTSUPP;
847 }
848
60d645a4 849 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
c66ac9db
NB		 850 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
851 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
852 return -EOVERFLOW;
853 }
854 /*
855 * Check to see if any active $FABRIC_MOD exports exist. If they
856 * do exist, fail here as changing this information on the fly
857 * (underneath the initiator side OS dependent multipath code)
858 * could cause negative effects.
859 */
860 dev = su_dev->se_dev_ptr;
861 if ((dev)) {
862 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
863 printk(KERN_ERR "Unable to set VPD Unit Serial while"
864 " active %d $FABRIC_MOD exports exist\n",
865 atomic_read(&dev->dev_export_obj.obj_access_count));
866 return -EINVAL;
867 }
868 }
869 /*
870 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
871 *
872 * Also, strip any newline added from the userspace
873 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
874 */
875 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
876 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
877 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
878 "%s", strstrip(buf));
879 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
880
881 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
882 " %s\n", su_dev->t10_wwn.unit_serial);
883
884 return count;
885}
886
887SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
888
889/*
890 * VPD page 0x83 Protocol Identifier
891 */
892static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
893 struct t10_wwn *t10_wwn,
894 char *page)
895{
896 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
897 struct se_device *dev;
898 struct t10_vpd *vpd;
899 unsigned char buf[VPD_TMP_BUF_SIZE];
900 ssize_t len = 0;
901
902 dev = se_dev->se_dev_ptr;
903 if (!(dev))
904 return -ENODEV;
905
906 memset(buf, 0, VPD_TMP_BUF_SIZE);
907
908 spin_lock(&t10_wwn->t10_vpd_lock);
909 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
910 if (!(vpd->protocol_identifier_set))
911 continue;
912
913 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
914
60d645a4 915 if ((len + strlen(buf) >= PAGE_SIZE))
c66ac9db
NB		 916 break;
917
918 len += sprintf(page+len, "%s", buf);
919 }
920 spin_unlock(&t10_wwn->t10_vpd_lock);
921
922 return len;
923}
924
925static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
926 struct t10_wwn *t10_wwn,
927 const char *page,
928 size_t count)
929{
930 return -ENOSYS;
931}
932
933SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
934
935/*
936 * Generic wrapper for dumping VPD identifiers by association.
937 */
938#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
939static ssize_t target_core_dev_wwn_show_attr_##_name( \
940 struct t10_wwn *t10_wwn, \
941 char *page) \
942{ \
943 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
944 struct se_device *dev; \
945 struct t10_vpd *vpd; \
946 unsigned char buf[VPD_TMP_BUF_SIZE]; \
947 ssize_t len = 0; \
948 \
949 dev = se_dev->se_dev_ptr; \
950 if (!(dev)) \
951 return -ENODEV; \
952 \
953 spin_lock(&t10_wwn->t10_vpd_lock); \
954 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
955 if (vpd->association != _assoc) \
956 continue; \
957 \
958 memset(buf, 0, VPD_TMP_BUF_SIZE); \
959 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
60d645a4 960 if ((len + strlen(buf) >= PAGE_SIZE)) \
c66ac9db
NB		 961 break; \
962 len += sprintf(page+len, "%s", buf); \
963 \
964 memset(buf, 0, VPD_TMP_BUF_SIZE); \
965 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
60d645a4 966 if ((len + strlen(buf) >= PAGE_SIZE)) \
c66ac9db
NB		 967 break; \
968 len += sprintf(page+len, "%s", buf); \
969 \
970 memset(buf, 0, VPD_TMP_BUF_SIZE); \
971 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
60d645a4 972 if ((len + strlen(buf) >= PAGE_SIZE)) \
c66ac9db
NB		 973 break; \
974 len += sprintf(page+len, "%s", buf); \
975 } \
976 spin_unlock(&t10_wwn->t10_vpd_lock); \
977 \
978 return len; \
979}
980
981/*
982 * VPD page 0x83 Assoication: Logical Unit
983 */
984DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
985
986static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
987 struct t10_wwn *t10_wwn,
988 const char *page,
989 size_t count)
990{
991 return -ENOSYS;
992}
993
994SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
995
996/*
997 * VPD page 0x83 Association: Target Port
998 */
999DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1000
1001static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1002 struct t10_wwn *t10_wwn,
1003 const char *page,
1004 size_t count)
1005{
1006 return -ENOSYS;
1007}
1008
1009SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1010
1011/*
1012 * VPD page 0x83 Association: SCSI Target Device
1013 */
1014DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1015
1016static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1017 struct t10_wwn *t10_wwn,
1018 const char *page,
1019 size_t count)
1020{
1021 return -ENOSYS;
1022}
1023
1024SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1025
1026CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1027
1028static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1029 &target_core_dev_wwn_vpd_unit_serial.attr,
1030 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1031 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1032 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1033 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1034 NULL,
1035};
1036
1037static struct configfs_item_operations target_core_dev_wwn_ops = {
1038 .show_attribute = target_core_dev_wwn_attr_show,
1039 .store_attribute = target_core_dev_wwn_attr_store,
1040};
1041
1042static struct config_item_type target_core_dev_wwn_cit = {
1043 .ct_item_ops = &target_core_dev_wwn_ops,
1044 .ct_attrs = target_core_dev_wwn_attrs,
1045 .ct_owner = THIS_MODULE,
1046};
1047
1048/* End functions for struct config_item_type target_core_dev_wwn_cit */
1049
1050/* Start functions for struct config_item_type target_core_dev_pr_cit */
1051
1052CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1053#define SE_DEV_PR_ATTR(_name, _mode) \
1054static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1055 __CONFIGFS_EATTR(_name, _mode, \
1056 target_core_dev_pr_show_attr_##_name, \
1057 target_core_dev_pr_store_attr_##_name);
1058
1059#define SE_DEV_PR_ATTR_RO(_name); \
1060static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1061 __CONFIGFS_EATTR_RO(_name, \
1062 target_core_dev_pr_show_attr_##_name);
1063
1064/*
1065 * res_holder
1066 */
1067static ssize_t target_core_dev_pr_show_spc3_res(
1068 struct se_device *dev,
1069 char *page,
1070 ssize_t *len)
1071{
1072 struct se_node_acl *se_nacl;
1073 struct t10_pr_registration *pr_reg;
1074 char i_buf[PR_REG_ISID_ID_LEN];
1075 int prf_isid;
1076
1077 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1078
1079 spin_lock(&dev->dev_reservation_lock);
1080 pr_reg = dev->dev_pr_res_holder;
1081 if (!(pr_reg)) {
1082 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1083 spin_unlock(&dev->dev_reservation_lock);
1084 return *len;
1085 }
1086 se_nacl = pr_reg->pr_reg_nacl;
1087 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1088 PR_REG_ISID_ID_LEN);
1089
1090 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
e3d6f909 1091 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 1092 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1093 spin_unlock(&dev->dev_reservation_lock);
1094
1095 return *len;
1096}
1097
1098static ssize_t target_core_dev_pr_show_spc2_res(
1099 struct se_device *dev,
1100 char *page,
1101 ssize_t *len)
1102{
1103 struct se_node_acl *se_nacl;
1104
1105 spin_lock(&dev->dev_reservation_lock);
1106 se_nacl = dev->dev_reserved_node_acl;
1107 if (!(se_nacl)) {
1108 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1109 spin_unlock(&dev->dev_reservation_lock);
1110 return *len;
1111 }
1112 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
e3d6f909 1113 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 1114 se_nacl->initiatorname);
1115 spin_unlock(&dev->dev_reservation_lock);
1116
1117 return *len;
1118}
1119
1120static ssize_t target_core_dev_pr_show_attr_res_holder(
1121 struct se_subsystem_dev *su_dev,
1122 char *page)
1123{
1124 ssize_t len = 0;
1125
1126 if (!(su_dev->se_dev_ptr))
1127 return -ENODEV;
1128
e3d6f909 1129 switch (su_dev->t10_pr.res_type) {
c66ac9db
NB		 1130 case SPC3_PERSISTENT_RESERVATIONS:
1131 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1132 page, &len);
1133 break;
1134 case SPC2_RESERVATIONS:
1135 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1136 page, &len);
1137 break;
1138 case SPC_PASSTHROUGH:
1139 len += sprintf(page+len, "Passthrough\n");
1140 break;
1141 default:
1142 len += sprintf(page+len, "Unknown\n");
1143 break;
1144 }
1145
1146 return len;
1147}
1148
1149SE_DEV_PR_ATTR_RO(res_holder);
1150
1151/*
1152 * res_pr_all_tgt_pts
1153 */
1154static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1155 struct se_subsystem_dev *su_dev,
1156 char *page)
1157{
1158 struct se_device *dev;
1159 struct t10_pr_registration *pr_reg;
1160 ssize_t len = 0;
1161
1162 dev = su_dev->se_dev_ptr;
1163 if (!(dev))
1164 return -ENODEV;
1165
e3d6f909 1166 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1167 return len;
1168
1169 spin_lock(&dev->dev_reservation_lock);
1170 pr_reg = dev->dev_pr_res_holder;
1171 if (!(pr_reg)) {
1172 len = sprintf(page, "No SPC-3 Reservation holder\n");
1173 spin_unlock(&dev->dev_reservation_lock);
1174 return len;
1175 }
1176 /*
1177 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1178 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1179 */
1180 if (pr_reg->pr_reg_all_tg_pt)
1181 len = sprintf(page, "SPC-3 Reservation: All Target"
1182 " Ports registration\n");
1183 else
1184 len = sprintf(page, "SPC-3 Reservation: Single"
1185 " Target Port registration\n");
1186 spin_unlock(&dev->dev_reservation_lock);
1187
1188 return len;
1189}
1190
1191SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1192
1193/*
1194 * res_pr_generation
1195 */
1196static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1197 struct se_subsystem_dev *su_dev,
1198 char *page)
1199{
1200 if (!(su_dev->se_dev_ptr))
1201 return -ENODEV;
1202
e3d6f909 1203 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1204 return 0;
1205
e3d6f909 1206 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
c66ac9db
NB		 1207}
1208
1209SE_DEV_PR_ATTR_RO(res_pr_generation);
1210
1211/*
1212 * res_pr_holder_tg_port
1213 */
1214static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1215 struct se_subsystem_dev *su_dev,
1216 char *page)
1217{
1218 struct se_device *dev;
1219 struct se_node_acl *se_nacl;
1220 struct se_lun *lun;
1221 struct se_portal_group *se_tpg;
1222 struct t10_pr_registration *pr_reg;
1223 struct target_core_fabric_ops *tfo;
1224 ssize_t len = 0;
1225
1226 dev = su_dev->se_dev_ptr;
1227 if (!(dev))
1228 return -ENODEV;
1229
e3d6f909 1230 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1231 return len;
1232
1233 spin_lock(&dev->dev_reservation_lock);
1234 pr_reg = dev->dev_pr_res_holder;
1235 if (!(pr_reg)) {
1236 len = sprintf(page, "No SPC-3 Reservation holder\n");
1237 spin_unlock(&dev->dev_reservation_lock);
1238 return len;
1239 }
1240 se_nacl = pr_reg->pr_reg_nacl;
1241 se_tpg = se_nacl->se_tpg;
1242 lun = pr_reg->pr_reg_tg_pt_lun;
e3d6f909 1243 tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 1244
1245 len += sprintf(page+len, "SPC-3 Reservation: %s"
1246 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1247 tfo->tpg_get_wwn(se_tpg));
1248 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1249 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1250 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1251 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1252 tfo->get_fabric_name(), lun->unpacked_lun);
1253 spin_unlock(&dev->dev_reservation_lock);
1254
1255 return len;
1256}
1257
1258SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1259
1260/*
1261 * res_pr_registered_i_pts
1262 */
1263static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1264 struct se_subsystem_dev *su_dev,
1265 char *page)
1266{
1267 struct target_core_fabric_ops *tfo;
1268 struct t10_pr_registration *pr_reg;
1269 unsigned char buf[384];
1270 char i_buf[PR_REG_ISID_ID_LEN];
1271 ssize_t len = 0;
1272 int reg_count = 0, prf_isid;
1273
1274 if (!(su_dev->se_dev_ptr))
1275 return -ENODEV;
1276
e3d6f909 1277 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1278 return len;
1279
1280 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1281
e3d6f909
AG		 1282 spin_lock(&su_dev->t10_pr.registration_lock);
1283 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
c66ac9db
NB		 1284 pr_reg_list) {
1285
1286 memset(buf, 0, 384);
1287 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1288 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1289 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1290 PR_REG_ISID_ID_LEN);
1291 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1292 tfo->get_fabric_name(),
1293 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1294 &i_buf[0] : "", pr_reg->pr_res_key,
1295 pr_reg->pr_res_generation);
1296
60d645a4 1297 if ((len + strlen(buf) >= PAGE_SIZE))
c66ac9db
NB		 1298 break;
1299
1300 len += sprintf(page+len, "%s", buf);
1301 reg_count++;
1302 }
e3d6f909 1303 spin_unlock(&su_dev->t10_pr.registration_lock);
c66ac9db
NB		 1304
1305 if (!(reg_count))
1306 len += sprintf(page+len, "None\n");
1307
1308 return len;
1309}
1310
1311SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1312
1313/*
1314 * res_pr_type
1315 */
1316static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1317 struct se_subsystem_dev *su_dev,
1318 char *page)
1319{
1320 struct se_device *dev;
1321 struct t10_pr_registration *pr_reg;
1322 ssize_t len = 0;
1323
1324 dev = su_dev->se_dev_ptr;
1325 if (!(dev))
1326 return -ENODEV;
1327
e3d6f909 1328 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1329 return len;
1330
1331 spin_lock(&dev->dev_reservation_lock);
1332 pr_reg = dev->dev_pr_res_holder;
1333 if (!(pr_reg)) {
1334 len = sprintf(page, "No SPC-3 Reservation holder\n");
1335 spin_unlock(&dev->dev_reservation_lock);
1336 return len;
1337 }
1338 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1339 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1340 spin_unlock(&dev->dev_reservation_lock);
1341
1342 return len;
1343}
1344
1345SE_DEV_PR_ATTR_RO(res_pr_type);
1346
1347/*
1348 * res_type
1349 */
1350static ssize_t target_core_dev_pr_show_attr_res_type(
1351 struct se_subsystem_dev *su_dev,
1352 char *page)
1353{
1354 ssize_t len = 0;
1355
1356 if (!(su_dev->se_dev_ptr))
1357 return -ENODEV;
1358
e3d6f909 1359 switch (su_dev->t10_pr.res_type) {
c66ac9db
NB		 1360 case SPC3_PERSISTENT_RESERVATIONS:
1361 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1362 break;
1363 case SPC2_RESERVATIONS:
1364 len = sprintf(page, "SPC2_RESERVATIONS\n");
1365 break;
1366 case SPC_PASSTHROUGH:
1367 len = sprintf(page, "SPC_PASSTHROUGH\n");
1368 break;
1369 default:
1370 len = sprintf(page, "UNKNOWN\n");
1371 break;
1372 }
1373
1374 return len;
1375}
1376
1377SE_DEV_PR_ATTR_RO(res_type);
1378
1379/*
1380 * res_aptpl_active
1381 */
1382
1383static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1384 struct se_subsystem_dev *su_dev,
1385 char *page)
1386{
1387 if (!(su_dev->se_dev_ptr))
1388 return -ENODEV;
1389
e3d6f909 1390 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1391 return 0;
1392
1393 return sprintf(page, "APTPL Bit Status: %s\n",
e3d6f909 1394 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
c66ac9db
NB		 1395}
1396
1397SE_DEV_PR_ATTR_RO(res_aptpl_active);
1398
1399/*
1400 * res_aptpl_metadata
1401 */
1402static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1403 struct se_subsystem_dev *su_dev,
1404 char *page)
1405{
1406 if (!(su_dev->se_dev_ptr))
1407 return -ENODEV;
1408
e3d6f909 1409 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1410 return 0;
1411
1412 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1413}
1414
1415enum {
1416 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1417 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1418 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1419 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1420};
1421
1422static match_table_t tokens = {
1423 {Opt_initiator_fabric, "initiator_fabric=%s"},
1424 {Opt_initiator_node, "initiator_node=%s"},
1425 {Opt_initiator_sid, "initiator_sid=%s"},
1426 {Opt_sa_res_key, "sa_res_key=%s"},
1427 {Opt_res_holder, "res_holder=%d"},
1428 {Opt_res_type, "res_type=%d"},
1429 {Opt_res_scope, "res_scope=%d"},
1430 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1431 {Opt_mapped_lun, "mapped_lun=%d"},
1432 {Opt_target_fabric, "target_fabric=%s"},
1433 {Opt_target_node, "target_node=%s"},
1434 {Opt_tpgt, "tpgt=%d"},
1435 {Opt_port_rtpi, "port_rtpi=%d"},
1436 {Opt_target_lun, "target_lun=%d"},
1437 {Opt_err, NULL}
1438};
1439
1440static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1441 struct se_subsystem_dev *su_dev,
1442 const char *page,
1443 size_t count)
1444{
1445 struct se_device *dev;
6d180253
JJ		 1446 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1447 unsigned char *t_fabric = NULL, *t_port = NULL;
c66ac9db
NB		 1448 char *orig, *ptr, *arg_p, *opts;
1449 substring_t args[MAX_OPT_ARGS];
1450 unsigned long long tmp_ll;
1451 u64 sa_res_key = 0;
1452 u32 mapped_lun = 0, target_lun = 0;
1453 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1454 u16 port_rpti = 0, tpgt = 0;
1455 u8 type = 0, scope;
1456
1457 dev = su_dev->se_dev_ptr;
1458 if (!(dev))
1459 return -ENODEV;
1460
e3d6f909 1461 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
c66ac9db
NB		 1462 return 0;
1463
1464 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1465 printk(KERN_INFO "Unable to process APTPL metadata while"
1466 " active fabric exports exist\n");
1467 return -EINVAL;
1468 }
1469
1470 opts = kstrdup(page, GFP_KERNEL);
1471 if (!opts)
1472 return -ENOMEM;
1473
1474 orig = opts;
1475 while ((ptr = strsep(&opts, ",")) != NULL) {
1476 if (!*ptr)
1477 continue;
1478
1479 token = match_token(ptr, tokens, args);
1480 switch (token) {
1481 case Opt_initiator_fabric:
1482 i_fabric = match_strdup(&args[0]);
6d180253
JJ		 1483 if (!i_fabric) {
1484 ret = -ENOMEM;
1485 goto out;
1486 }
c66ac9db
NB		 1487 break;
1488 case Opt_initiator_node:
1489 i_port = match_strdup(&args[0]);
6d180253
JJ		 1490 if (!i_port) {
1491 ret = -ENOMEM;
1492 goto out;
1493 }
60d645a4 1494 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
c66ac9db
NB		 1495 printk(KERN_ERR "APTPL metadata initiator_node="
1496 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1497 PR_APTPL_MAX_IPORT_LEN);
1498 ret = -EINVAL;
1499 break;
1500 }
1501 break;
1502 case Opt_initiator_sid:
1503 isid = match_strdup(&args[0]);
6d180253
JJ		 1504 if (!isid) {
1505 ret = -ENOMEM;
1506 goto out;
1507 }
60d645a4 1508 if (strlen(isid) >= PR_REG_ISID_LEN) {
c66ac9db
NB		 1509 printk(KERN_ERR "APTPL metadata initiator_isid"
1510 "= exceeds PR_REG_ISID_LEN: %d\n",
1511 PR_REG_ISID_LEN);
1512 ret = -EINVAL;
1513 break;
1514 }
1515 break;
1516 case Opt_sa_res_key:
1517 arg_p = match_strdup(&args[0]);
6d180253
JJ		 1518 if (!arg_p) {
1519 ret = -ENOMEM;
1520 goto out;
1521 }
c66ac9db
NB		 1522 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1523 if (ret < 0) {
1524 printk(KERN_ERR "strict_strtoull() failed for"
1525 " sa_res_key=\n");
1526 goto out;
1527 }
1528 sa_res_key = (u64)tmp_ll;
1529 break;
1530 /*
1531 * PR APTPL Metadata for Reservation
1532 */
1533 case Opt_res_holder:
1534 match_int(args, &arg);
1535 res_holder = arg;
1536 break;
1537 case Opt_res_type:
1538 match_int(args, &arg);
1539 type = (u8)arg;
1540 break;
1541 case Opt_res_scope:
1542 match_int(args, &arg);
1543 scope = (u8)arg;
1544 break;
1545 case Opt_res_all_tg_pt:
1546 match_int(args, &arg);
1547 all_tg_pt = (int)arg;
1548 break;
1549 case Opt_mapped_lun:
1550 match_int(args, &arg);
1551 mapped_lun = (u32)arg;
1552 break;
1553 /*
1554 * PR APTPL Metadata for Target Port
1555 */
1556 case Opt_target_fabric:
1557 t_fabric = match_strdup(&args[0]);
6d180253
JJ		 1558 if (!t_fabric) {
1559 ret = -ENOMEM;
1560 goto out;
1561 }
c66ac9db
NB		 1562 break;
1563 case Opt_target_node:
1564 t_port = match_strdup(&args[0]);
6d180253
JJ		 1565 if (!t_port) {
1566 ret = -ENOMEM;
1567 goto out;
1568 }
60d645a4 1569 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
c66ac9db
NB		 1570 printk(KERN_ERR "APTPL metadata target_node="
1571 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1572 PR_APTPL_MAX_TPORT_LEN);
1573 ret = -EINVAL;
1574 break;
1575 }
1576 break;
1577 case Opt_tpgt:
1578 match_int(args, &arg);
1579 tpgt = (u16)arg;
1580 break;
1581 case Opt_port_rtpi:
1582 match_int(args, &arg);
1583 port_rpti = (u16)arg;
1584 break;
1585 case Opt_target_lun:
1586 match_int(args, &arg);
1587 target_lun = (u32)arg;
1588 break;
1589 default:
1590 break;
1591 }
1592 }
1593
1594 if (!(i_port) || !(t_port) || !(sa_res_key)) {
1595 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1596 ret = -EINVAL;
1597 goto out;
1598 }
1599
1600 if (res_holder && !(type)) {
1601 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1602 " holder\n", type);
1603 ret = -EINVAL;
1604 goto out;
1605 }
1606
e3d6f909 1607 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
c66ac9db
NB		 1608 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1609 res_holder, all_tg_pt, type);
1610out:
6d180253
JJ		 1611 kfree(i_fabric);
1612 kfree(i_port);
1613 kfree(isid);
1614 kfree(t_fabric);
1615 kfree(t_port);
c66ac9db
NB		 1616 kfree(orig);
1617 return (ret == 0) ? count : ret;
1618}
1619
1620SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1621
1622CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1623
1624static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1625 &target_core_dev_pr_res_holder.attr,
1626 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1627 &target_core_dev_pr_res_pr_generation.attr,
1628 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1629 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1630 &target_core_dev_pr_res_pr_type.attr,
1631 &target_core_dev_pr_res_type.attr,
1632 &target_core_dev_pr_res_aptpl_active.attr,
1633 &target_core_dev_pr_res_aptpl_metadata.attr,
1634 NULL,
1635};
1636
1637static struct configfs_item_operations target_core_dev_pr_ops = {
1638 .show_attribute = target_core_dev_pr_attr_show,
1639 .store_attribute = target_core_dev_pr_attr_store,
1640};
1641
1642static struct config_item_type target_core_dev_pr_cit = {
1643 .ct_item_ops = &target_core_dev_pr_ops,
1644 .ct_attrs = target_core_dev_pr_attrs,
1645 .ct_owner = THIS_MODULE,
1646};
1647
1648/* End functions for struct config_item_type target_core_dev_pr_cit */
1649
1650/* Start functions for struct config_item_type target_core_dev_cit */
1651
1652static ssize_t target_core_show_dev_info(void *p, char *page)
1653{
1654 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1655 struct se_hba *hba = se_dev->se_dev_hba;
1656 struct se_subsystem_api *t = hba->transport;
1657 int bl = 0;
1658 ssize_t read_bytes = 0;
1659
1660 if (!(se_dev->se_dev_ptr))
1661 return -ENODEV;
1662
1663 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1664 read_bytes += bl;
1665 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1666 return read_bytes;
1667}
1668
1669static struct target_core_configfs_attribute target_core_attr_dev_info = {
1670 .attr = { .ca_owner = THIS_MODULE,
1671 .ca_name = "info",
1672 .ca_mode = S_IRUGO },
1673 .show = target_core_show_dev_info,
1674 .store = NULL,
1675};
1676
1677static ssize_t target_core_store_dev_control(
1678 void *p,
1679 const char *page,
1680 size_t count)
1681{
1682 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1683 struct se_hba *hba = se_dev->se_dev_hba;
1684 struct se_subsystem_api *t = hba->transport;
1685
1686 if (!(se_dev->se_dev_su_ptr)) {
1687 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1688 "_dev_su_ptr\n");
1689 return -EINVAL;
1690 }
1691
1692 return t->set_configfs_dev_params(hba, se_dev, page, count);
1693}
1694
1695static struct target_core_configfs_attribute target_core_attr_dev_control = {
1696 .attr = { .ca_owner = THIS_MODULE,
1697 .ca_name = "control",
1698 .ca_mode = S_IWUSR },
1699 .show = NULL,
1700 .store = target_core_store_dev_control,
1701};
1702
1703static ssize_t target_core_show_dev_alias(void *p, char *page)
1704{
1705 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1706
1707 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1708 return 0;
1709
1710 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1711}
1712
1713static ssize_t target_core_store_dev_alias(
1714 void *p,
1715 const char *page,
1716 size_t count)
1717{
1718 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1719 struct se_hba *hba = se_dev->se_dev_hba;
1720 ssize_t read_bytes;
1721
1722 if (count > (SE_DEV_ALIAS_LEN-1)) {
1723 printk(KERN_ERR "alias count: %d exceeds"
1724 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1725 SE_DEV_ALIAS_LEN-1);
1726 return -EINVAL;
1727 }
1728
1729 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1730 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1731 "%s", page);
1732
1733 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1734 config_item_name(&hba->hba_group.cg_item),
1735 config_item_name(&se_dev->se_dev_group.cg_item),
1736 se_dev->se_dev_alias);
1737
1738 return read_bytes;
1739}
1740
1741static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1742 .attr = { .ca_owner = THIS_MODULE,
1743 .ca_name = "alias",
1744 .ca_mode = S_IRUGO | S_IWUSR },
1745 .show = target_core_show_dev_alias,
1746 .store = target_core_store_dev_alias,
1747};
1748
1749static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1750{
1751 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1752
1753 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1754 return 0;
1755
1756 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1757}
1758
1759static ssize_t target_core_store_dev_udev_path(
1760 void *p,
1761 const char *page,
1762 size_t count)
1763{
1764 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1765 struct se_hba *hba = se_dev->se_dev_hba;
1766 ssize_t read_bytes;
1767
1768 if (count > (SE_UDEV_PATH_LEN-1)) {
1769 printk(KERN_ERR "udev_path count: %d exceeds"
1770 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1771 SE_UDEV_PATH_LEN-1);
1772 return -EINVAL;
1773 }
1774
1775 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1776 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1777 "%s", page);
1778
1779 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1780 config_item_name(&hba->hba_group.cg_item),
1781 config_item_name(&se_dev->se_dev_group.cg_item),
1782 se_dev->se_dev_udev_path);
1783
1784 return read_bytes;
1785}
1786
1787static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1788 .attr = { .ca_owner = THIS_MODULE,
1789 .ca_name = "udev_path",
1790 .ca_mode = S_IRUGO | S_IWUSR },
1791 .show = target_core_show_dev_udev_path,
1792 .store = target_core_store_dev_udev_path,
1793};
1794
1795static ssize_t target_core_store_dev_enable(
1796 void *p,
1797 const char *page,
1798 size_t count)
1799{
1800 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1801 struct se_device *dev;
1802 struct se_hba *hba = se_dev->se_dev_hba;
1803 struct se_subsystem_api *t = hba->transport;
1804 char *ptr;
1805
1806 ptr = strstr(page, "1");
1807 if (!(ptr)) {
1808 printk(KERN_ERR "For dev_enable ops, only valid value"
1809 " is \"1\"\n");
1810 return -EINVAL;
1811 }
1812 if ((se_dev->se_dev_ptr)) {
1813 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1814 " object\n");
1815 return -EEXIST;
1816 }
1817
1818 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1819 return -EINVAL;
1820
1821 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
613640e4
NB		 1822 if (IS_ERR(dev))
1823 return PTR_ERR(dev);
1824 else if (!dev)
c66ac9db
NB		 1825 return -EINVAL;
1826
1827 se_dev->se_dev_ptr = dev;
1828 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1829 " %p\n", se_dev->se_dev_ptr);
1830
1831 return count;
1832}
1833
1834static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1835 .attr = { .ca_owner = THIS_MODULE,
1836 .ca_name = "enable",
1837 .ca_mode = S_IWUSR },
1838 .show = NULL,
1839 .store = target_core_store_dev_enable,
1840};
1841
1842static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1843{
1844 struct se_device *dev;
1845 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1846 struct config_item *lu_ci;
1847 struct t10_alua_lu_gp *lu_gp;
1848 struct t10_alua_lu_gp_member *lu_gp_mem;
1849 ssize_t len = 0;
1850
1851 dev = su_dev->se_dev_ptr;
1852 if (!(dev))
1853 return -ENODEV;
1854
e3d6f909 1855 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
c66ac9db
NB		 1856 return len;
1857
1858 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1859 if (!(lu_gp_mem)) {
1860 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1861 " pointer\n");
1862 return -EINVAL;
1863 }
1864
1865 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1866 lu_gp = lu_gp_mem->lu_gp;
1867 if ((lu_gp)) {
1868 lu_ci = &lu_gp->lu_gp_group.cg_item;
1869 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1870 config_item_name(lu_ci), lu_gp->lu_gp_id);
1871 }
1872 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1873
1874 return len;
1875}
1876
1877static ssize_t target_core_store_alua_lu_gp(
1878 void *p,
1879 const char *page,
1880 size_t count)
1881{
1882 struct se_device *dev;
1883 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1884 struct se_hba *hba = su_dev->se_dev_hba;
1885 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1886 struct t10_alua_lu_gp_member *lu_gp_mem;
1887 unsigned char buf[LU_GROUP_NAME_BUF];
1888 int move = 0;
1889
1890 dev = su_dev->se_dev_ptr;
1891 if (!(dev))
1892 return -ENODEV;
1893
e3d6f909 1894 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
c66ac9db
NB		 1895 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1896 config_item_name(&hba->hba_group.cg_item),
1897 config_item_name(&su_dev->se_dev_group.cg_item));
1898 return -EINVAL;
1899 }
1900 if (count > LU_GROUP_NAME_BUF) {
1901 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1902 return -EINVAL;
1903 }
1904 memset(buf, 0, LU_GROUP_NAME_BUF);
1905 memcpy(buf, page, count);
1906 /*
1907 * Any ALUA logical unit alias besides "NULL" means we will be
1908 * making a new group association.
1909 */
1910 if (strcmp(strstrip(buf), "NULL")) {
1911 /*
1912 * core_alua_get_lu_gp_by_name() will increment reference to
1913 * struct t10_alua_lu_gp. This reference is released with
1914 * core_alua_get_lu_gp_by_name below().
1915 */
1916 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1917 if (!(lu_gp_new))
1918 return -ENODEV;
1919 }
1920 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1921 if (!(lu_gp_mem)) {
1922 if (lu_gp_new)
1923 core_alua_put_lu_gp_from_name(lu_gp_new);
1924 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1925 " pointer\n");
1926 return -EINVAL;
1927 }
1928
1929 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1930 lu_gp = lu_gp_mem->lu_gp;
1931 if ((lu_gp)) {
1932 /*
1933 * Clearing an existing lu_gp association, and replacing
1934 * with NULL
1935 */
1936 if (!(lu_gp_new)) {
1937 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1938 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1939 " %hu\n",
1940 config_item_name(&hba->hba_group.cg_item),
1941 config_item_name(&su_dev->se_dev_group.cg_item),
1942 config_item_name(&lu_gp->lu_gp_group.cg_item),
1943 lu_gp->lu_gp_id);
1944
1945 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1946 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1947
1948 return count;
1949 }
1950 /*
1951 * Removing existing association of lu_gp_mem with lu_gp
1952 */
1953 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1954 move = 1;
1955 }
1956 /*
1957 * Associate lu_gp_mem with lu_gp_new.
1958 */
1959 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1960 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1961
1962 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1963 " core/alua/lu_gps/%s, ID: %hu\n",
1964 (move) ? "Moving" : "Adding",
1965 config_item_name(&hba->hba_group.cg_item),
1966 config_item_name(&su_dev->se_dev_group.cg_item),
1967 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1968 lu_gp_new->lu_gp_id);
1969
1970 core_alua_put_lu_gp_from_name(lu_gp_new);
1971 return count;
1972}
1973
1974static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1975 .attr = { .ca_owner = THIS_MODULE,
1976 .ca_name = "alua_lu_gp",
1977 .ca_mode = S_IRUGO | S_IWUSR },
1978 .show = target_core_show_alua_lu_gp,
1979 .store = target_core_store_alua_lu_gp,
1980};
1981
1982static struct configfs_attribute *lio_core_dev_attrs[] = {
1983 &target_core_attr_dev_info.attr,
1984 &target_core_attr_dev_control.attr,
1985 &target_core_attr_dev_alias.attr,
1986 &target_core_attr_dev_udev_path.attr,
1987 &target_core_attr_dev_enable.attr,
1988 &target_core_attr_dev_alua_lu_gp.attr,
1989 NULL,
1990};
1991
1992static void target_core_dev_release(struct config_item *item)
1993{
1994 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1995 struct se_subsystem_dev, se_dev_group);
1f6fe7cb
NB		 1996 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1997 struct se_subsystem_api *t = hba->transport;
1998 struct config_group *dev_cg = &se_dev->se_dev_group;
c66ac9db 1999
c66ac9db 2000 kfree(dev_cg->default_groups);
1f6fe7cb
NB		 2001 /*
2002 * This pointer will set when the storage is enabled with:
2003 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2004 */
2005 if (se_dev->se_dev_ptr) {
2006 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
2007 "virtual_device() for se_dev_ptr: %p\n",
2008 se_dev->se_dev_ptr);
2009
2010 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2011 } else {
2012 /*
2013 * Release struct se_subsystem_dev->se_dev_su_ptr..
2014 */
2015 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2016 "device() for se_dev_su_ptr: %p\n",
2017 se_dev->se_dev_su_ptr);
2018
2019 t->free_device(se_dev->se_dev_su_ptr);
2020 }
2021
2022 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2023 "_dev_t: %p\n", se_dev);
2024 kfree(se_dev);
c66ac9db
NB		 2025}
2026
2027static ssize_t target_core_dev_show(struct config_item *item,
2028 struct configfs_attribute *attr,
2029 char *page)
2030{
2031 struct se_subsystem_dev *se_dev = container_of(
2032 to_config_group(item), struct se_subsystem_dev,
2033 se_dev_group);
2034 struct target_core_configfs_attribute *tc_attr = container_of(
2035 attr, struct target_core_configfs_attribute, attr);
2036
2037 if (!(tc_attr->show))
2038 return -EINVAL;
2039
2040 return tc_attr->show((void *)se_dev, page);
2041}
2042
2043static ssize_t target_core_dev_store(struct config_item *item,
2044 struct configfs_attribute *attr,
2045 const char *page, size_t count)
2046{
2047 struct se_subsystem_dev *se_dev = container_of(
2048 to_config_group(item), struct se_subsystem_dev,
2049 se_dev_group);
2050 struct target_core_configfs_attribute *tc_attr = container_of(
2051 attr, struct target_core_configfs_attribute, attr);
2052
2053 if (!(tc_attr->store))
2054 return -EINVAL;
2055
2056 return tc_attr->store((void *)se_dev, page, count);
2057}
2058
2059static struct configfs_item_operations target_core_dev_item_ops = {
2060 .release = target_core_dev_release,
2061 .show_attribute = target_core_dev_show,
2062 .store_attribute = target_core_dev_store,
2063};
2064
2065static struct config_item_type target_core_dev_cit = {
2066 .ct_item_ops = &target_core_dev_item_ops,
2067 .ct_attrs = lio_core_dev_attrs,
2068 .ct_owner = THIS_MODULE,
2069};
2070
2071/* End functions for struct config_item_type target_core_dev_cit */
2072
2073/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2074
2075CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2076#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2077static struct target_core_alua_lu_gp_attribute \
2078 target_core_alua_lu_gp_##_name = \
2079 __CONFIGFS_EATTR(_name, _mode, \
2080 target_core_alua_lu_gp_show_attr_##_name, \
2081 target_core_alua_lu_gp_store_attr_##_name);
2082
2083#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2084static struct target_core_alua_lu_gp_attribute \
2085 target_core_alua_lu_gp_##_name = \
2086 __CONFIGFS_EATTR_RO(_name, \
2087 target_core_alua_lu_gp_show_attr_##_name);
2088
2089/*
2090 * lu_gp_id
2091 */
2092static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2093 struct t10_alua_lu_gp *lu_gp,
2094 char *page)
2095{
2096 if (!(lu_gp->lu_gp_valid_id))
2097 return 0;
2098
2099 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2100}
2101
2102static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2103 struct t10_alua_lu_gp *lu_gp,
2104 const char *page,
2105 size_t count)
2106{
2107 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2108 unsigned long lu_gp_id;
2109 int ret;
2110
2111 ret = strict_strtoul(page, 0, &lu_gp_id);
2112 if (ret < 0) {
2113 printk(KERN_ERR "strict_strtoul() returned %d for"
2114 " lu_gp_id\n", ret);
2115 return -EINVAL;
2116 }
2117 if (lu_gp_id > 0x0000ffff) {
2118 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2119 " 0x0000ffff\n", lu_gp_id);
2120 return -EINVAL;
2121 }
2122
2123 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2124 if (ret < 0)
2125 return -EINVAL;
2126
2127 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2128 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2129 config_item_name(&alua_lu_gp_cg->cg_item),
2130 lu_gp->lu_gp_id);
2131
2132 return count;
2133}
2134
2135SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2136
2137/*
2138 * members
2139 */
2140static ssize_t target_core_alua_lu_gp_show_attr_members(
2141 struct t10_alua_lu_gp *lu_gp,
2142 char *page)
2143{
2144 struct se_device *dev;
2145 struct se_hba *hba;
2146 struct se_subsystem_dev *su_dev;
2147 struct t10_alua_lu_gp_member *lu_gp_mem;
2148 ssize_t len = 0, cur_len;
2149 unsigned char buf[LU_GROUP_NAME_BUF];
2150
2151 memset(buf, 0, LU_GROUP_NAME_BUF);
2152
2153 spin_lock(&lu_gp->lu_gp_lock);
2154 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2155 dev = lu_gp_mem->lu_gp_mem_dev;
2156 su_dev = dev->se_sub_dev;
2157 hba = su_dev->se_dev_hba;
2158
2159 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2160 config_item_name(&hba->hba_group.cg_item),
2161 config_item_name(&su_dev->se_dev_group.cg_item));
2162 cur_len++; /* Extra byte for NULL terminator */
2163
2164 if ((cur_len + len) > PAGE_SIZE) {
2165 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2166 "_members buffer\n");
2167 break;
2168 }
2169 memcpy(page+len, buf, cur_len);
2170 len += cur_len;
2171 }
2172 spin_unlock(&lu_gp->lu_gp_lock);
2173
2174 return len;
2175}
2176
2177SE_DEV_ALUA_LU_ATTR_RO(members);
2178
2179CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2180
2181static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2182 &target_core_alua_lu_gp_lu_gp_id.attr,
2183 &target_core_alua_lu_gp_members.attr,
2184 NULL,
2185};
2186
1f6fe7cb
NB		 2187static void target_core_alua_lu_gp_release(struct config_item *item)
2188{
2189 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2190 struct t10_alua_lu_gp, lu_gp_group);
2191
2192 core_alua_free_lu_gp(lu_gp);
2193}
2194
c66ac9db 2195static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1f6fe7cb 2196 .release = target_core_alua_lu_gp_release,
c66ac9db
NB		 2197 .show_attribute = target_core_alua_lu_gp_attr_show,
2198 .store_attribute = target_core_alua_lu_gp_attr_store,
2199};
2200
2201static struct config_item_type target_core_alua_lu_gp_cit = {
2202 .ct_item_ops = &target_core_alua_lu_gp_ops,
2203 .ct_attrs = target_core_alua_lu_gp_attrs,
2204 .ct_owner = THIS_MODULE,
2205};
2206
2207/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2208
2209/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2210
2211static struct config_group *target_core_alua_create_lu_gp(
2212 struct config_group *group,
2213 const char *name)
2214{
2215 struct t10_alua_lu_gp *lu_gp;
2216 struct config_group *alua_lu_gp_cg = NULL;
2217 struct config_item *alua_lu_gp_ci = NULL;
2218
2219 lu_gp = core_alua_allocate_lu_gp(name, 0);
2220 if (IS_ERR(lu_gp))
2221 return NULL;
2222
2223 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2224 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2225
2226 config_group_init_type_name(alua_lu_gp_cg, name,
2227 &target_core_alua_lu_gp_cit);
2228
2229 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2230 " Group: core/alua/lu_gps/%s\n",
2231 config_item_name(alua_lu_gp_ci));
2232
2233 return alua_lu_gp_cg;
2234
2235}
2236
2237static void target_core_alua_drop_lu_gp(
2238 struct config_group *group,
2239 struct config_item *item)
2240{
2241 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2242 struct t10_alua_lu_gp, lu_gp_group);
2243
2244 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2245 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2246 config_item_name(item), lu_gp->lu_gp_id);
1f6fe7cb
NB		 2247 /*
2248 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2249 * -> target_core_alua_lu_gp_release()
2250 */
c66ac9db 2251 config_item_put(item);
c66ac9db
NB		 2252}
2253
2254static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2255 .make_group = &target_core_alua_create_lu_gp,
2256 .drop_item = &target_core_alua_drop_lu_gp,
2257};
2258
2259static struct config_item_type target_core_alua_lu_gps_cit = {
2260 .ct_item_ops = NULL,
2261 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2262 .ct_owner = THIS_MODULE,
2263};
2264
2265/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2266
2267/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2268
2269CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2270#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2271static struct target_core_alua_tg_pt_gp_attribute \
2272 target_core_alua_tg_pt_gp_##_name = \
2273 __CONFIGFS_EATTR(_name, _mode, \
2274 target_core_alua_tg_pt_gp_show_attr_##_name, \
2275 target_core_alua_tg_pt_gp_store_attr_##_name);
2276
2277#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2278static struct target_core_alua_tg_pt_gp_attribute \
2279 target_core_alua_tg_pt_gp_##_name = \
2280 __CONFIGFS_EATTR_RO(_name, \
2281 target_core_alua_tg_pt_gp_show_attr_##_name);
2282
2283/*
2284 * alua_access_state
2285 */
2286static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2287 struct t10_alua_tg_pt_gp *tg_pt_gp,
2288 char *page)
2289{
2290 return sprintf(page, "%d\n",
2291 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2292}
2293
2294static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2295 struct t10_alua_tg_pt_gp *tg_pt_gp,
2296 const char *page,
2297 size_t count)
2298{
2299 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2300 unsigned long tmp;
2301 int new_state, ret;
2302
2303 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2304 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2305 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2306 return -EINVAL;
2307 }
2308
2309 ret = strict_strtoul(page, 0, &tmp);
2310 if (ret < 0) {
2311 printk("Unable to extract new ALUA access state from"
2312 " %s\n", page);
2313 return -EINVAL;
2314 }
2315 new_state = (int)tmp;
2316
2317 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2318 printk(KERN_ERR "Unable to process implict configfs ALUA"
2319 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2320 return -EINVAL;
2321 }
2322
2323 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2324 NULL, NULL, new_state, 0);
2325 return (!ret) ? count : -EINVAL;
2326}
2327
2328SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2329
2330/*
2331 * alua_access_status
2332 */
2333static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2334 struct t10_alua_tg_pt_gp *tg_pt_gp,
2335 char *page)
2336{
2337 return sprintf(page, "%s\n",
2338 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2339}
2340
2341static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2342 struct t10_alua_tg_pt_gp *tg_pt_gp,
2343 const char *page,
2344 size_t count)
2345{
2346 unsigned long tmp;
2347 int new_status, ret;
2348
2349 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2350 printk(KERN_ERR "Unable to do set ALUA access status on non"
2351 " valid tg_pt_gp ID: %hu\n",
2352 tg_pt_gp->tg_pt_gp_valid_id);
2353 return -EINVAL;
2354 }
2355
2356 ret = strict_strtoul(page, 0, &tmp);
2357 if (ret < 0) {
2358 printk(KERN_ERR "Unable to extract new ALUA access status"
2359 " from %s\n", page);
2360 return -EINVAL;
2361 }
2362 new_status = (int)tmp;
2363
2364 if ((new_status != ALUA_STATUS_NONE) &&
2365 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2366 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2367 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2368 new_status);
2369 return -EINVAL;
2370 }
2371
2372 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2373 return count;
2374}
2375
2376SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2377
2378/*
2379 * alua_access_type
2380 */
2381static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2382 struct t10_alua_tg_pt_gp *tg_pt_gp,
2383 char *page)
2384{
2385 return core_alua_show_access_type(tg_pt_gp, page);
2386}
2387
2388static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2389 struct t10_alua_tg_pt_gp *tg_pt_gp,
2390 const char *page,
2391 size_t count)
2392{
2393 return core_alua_store_access_type(tg_pt_gp, page, count);
2394}
2395
2396SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2397
2398/*
2399 * alua_write_metadata
2400 */
2401static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2402 struct t10_alua_tg_pt_gp *tg_pt_gp,
2403 char *page)
2404{
2405 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2406}
2407
2408static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2409 struct t10_alua_tg_pt_gp *tg_pt_gp,
2410 const char *page,
2411 size_t count)
2412{
2413 unsigned long tmp;
2414 int ret;
2415
2416 ret = strict_strtoul(page, 0, &tmp);
2417 if (ret < 0) {
2418 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2419 return -EINVAL;
2420 }
2421
2422 if ((tmp != 0) && (tmp != 1)) {
2423 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2424 " %lu\n", tmp);
2425 return -EINVAL;
2426 }
2427 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2428
2429 return count;
2430}
2431
2432SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2433
2434
2435
2436/*
2437 * nonop_delay_msecs
2438 */
2439static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2440 struct t10_alua_tg_pt_gp *tg_pt_gp,
2441 char *page)
2442{
2443 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2444
2445}
2446
2447static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2448 struct t10_alua_tg_pt_gp *tg_pt_gp,
2449 const char *page,
2450 size_t count)
2451{
2452 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2453}
2454
2455SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2456
2457/*
2458 * trans_delay_msecs
2459 */
2460static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2461 struct t10_alua_tg_pt_gp *tg_pt_gp,
2462 char *page)
2463{
2464 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2465}
2466
2467static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2468 struct t10_alua_tg_pt_gp *tg_pt_gp,
2469 const char *page,
2470 size_t count)
2471{
2472 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2473}
2474
2475SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2476
2477/*
2478 * preferred
2479 */
2480
2481static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2482 struct t10_alua_tg_pt_gp *tg_pt_gp,
2483 char *page)
2484{
2485 return core_alua_show_preferred_bit(tg_pt_gp, page);
2486}
2487
2488static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2489 struct t10_alua_tg_pt_gp *tg_pt_gp,
2490 const char *page,
2491 size_t count)
2492{
2493 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2494}
2495
2496SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2497
2498/*
2499 * tg_pt_gp_id
2500 */
2501static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2502 struct t10_alua_tg_pt_gp *tg_pt_gp,
2503 char *page)
2504{
2505 if (!(tg_pt_gp->tg_pt_gp_valid_id))
2506 return 0;
2507
2508 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2509}
2510
2511static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2512 struct t10_alua_tg_pt_gp *tg_pt_gp,
2513 const char *page,
2514 size_t count)
2515{
2516 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2517 unsigned long tg_pt_gp_id;
2518 int ret;
2519
2520 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2521 if (ret < 0) {
2522 printk(KERN_ERR "strict_strtoul() returned %d for"
2523 " tg_pt_gp_id\n", ret);
2524 return -EINVAL;
2525 }
2526 if (tg_pt_gp_id > 0x0000ffff) {
2527 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2528 " 0x0000ffff\n", tg_pt_gp_id);
2529 return -EINVAL;
2530 }
2531
2532 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2533 if (ret < 0)
2534 return -EINVAL;
2535
2536 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2537 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2538 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2539 tg_pt_gp->tg_pt_gp_id);
2540
2541 return count;
2542}
2543
2544SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2545
2546/*
2547 * members
2548 */
2549static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2550 struct t10_alua_tg_pt_gp *tg_pt_gp,
2551 char *page)
2552{
2553 struct se_port *port;
2554 struct se_portal_group *tpg;
2555 struct se_lun *lun;
2556 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2557 ssize_t len = 0, cur_len;
2558 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2559
2560 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2561
2562 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2563 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2564 tg_pt_gp_mem_list) {
2565 port = tg_pt_gp_mem->tg_pt;
2566 tpg = port->sep_tpg;
2567 lun = port->sep_lun;
2568
2569 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
e3d6f909
AG		 2570 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2571 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2572 tpg->se_tpg_tfo->tpg_get_tag(tpg),
c66ac9db
NB		 2573 config_item_name(&lun->lun_group.cg_item));
2574 cur_len++; /* Extra byte for NULL terminator */
2575
2576 if ((cur_len + len) > PAGE_SIZE) {
2577 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2578 "_members buffer\n");
2579 break;
2580 }
2581 memcpy(page+len, buf, cur_len);
2582 len += cur_len;
2583 }
2584 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2585
2586 return len;
2587}
2588
2589SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2590
2591CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2592 tg_pt_gp_group);
2593
2594static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2595 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2596 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2597 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2598 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2599 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2600 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2601 &target_core_alua_tg_pt_gp_preferred.attr,
2602 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2603 &target_core_alua_tg_pt_gp_members.attr,
2604 NULL,
2605};
2606
1f6fe7cb
NB		 2607static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2608{
2609 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2610 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2611
2612 core_alua_free_tg_pt_gp(tg_pt_gp);
2613}
2614
c66ac9db 2615static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
1f6fe7cb 2616 .release = target_core_alua_tg_pt_gp_release,
c66ac9db
NB		 2617 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2618 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2619};
2620
2621static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2622 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2623 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2624 .ct_owner = THIS_MODULE,
2625};
2626
2627/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2628
2629/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2630
2631static struct config_group *target_core_alua_create_tg_pt_gp(
2632 struct config_group *group,
2633 const char *name)
2634{
2635 struct t10_alua *alua = container_of(group, struct t10_alua,
2636 alua_tg_pt_gps_group);
2637 struct t10_alua_tg_pt_gp *tg_pt_gp;
2638 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2639 struct config_group *alua_tg_pt_gp_cg = NULL;
2640 struct config_item *alua_tg_pt_gp_ci = NULL;
2641
2642 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2643 if (!(tg_pt_gp))
2644 return NULL;
2645
2646 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2647 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2648
2649 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2650 &target_core_alua_tg_pt_gp_cit);
2651
2652 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2653 " Group: alua/tg_pt_gps/%s\n",
2654 config_item_name(alua_tg_pt_gp_ci));
2655
2656 return alua_tg_pt_gp_cg;
2657}
2658
2659static void target_core_alua_drop_tg_pt_gp(
2660 struct config_group *group,
2661 struct config_item *item)
2662{
2663 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2664 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2665
2666 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2667 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2668 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
1f6fe7cb
NB		 2669 /*
2670 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2671 * -> target_core_alua_tg_pt_gp_release().
2672 */
c66ac9db 2673 config_item_put(item);
c66ac9db
NB		 2674}
2675
2676static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2677 .make_group = &target_core_alua_create_tg_pt_gp,
2678 .drop_item = &target_core_alua_drop_tg_pt_gp,
2679};
2680
2681static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2682 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2683 .ct_owner = THIS_MODULE,
2684};
2685
2686/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2687
2688/* Start functions for struct config_item_type target_core_alua_cit */
2689
2690/*
2691 * target_core_alua_cit is a ConfigFS group that lives under
2692 * /sys/kernel/config/target/core/alua. There are default groups
2693 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2694 * target_core_alua_cit in target_core_init_configfs() below.
2695 */
2696static struct config_item_type target_core_alua_cit = {
2697 .ct_item_ops = NULL,
2698 .ct_attrs = NULL,
2699 .ct_owner = THIS_MODULE,
2700};
2701
2702/* End functions for struct config_item_type target_core_alua_cit */
2703
12d23384
NB		 2704/* Start functions for struct config_item_type target_core_stat_cit */
2705
2706static struct config_group *target_core_stat_mkdir(
2707 struct config_group *group,
2708 const char *name)
2709{
2710 return ERR_PTR(-ENOSYS);
2711}
2712
2713static void target_core_stat_rmdir(
2714 struct config_group *group,
2715 struct config_item *item)
2716{
2717 return;
2718}
2719
2720static struct configfs_group_operations target_core_stat_group_ops = {
2721 .make_group = &target_core_stat_mkdir,
2722 .drop_item = &target_core_stat_rmdir,
2723};
2724
2725static struct config_item_type target_core_stat_cit = {
2726 .ct_group_ops = &target_core_stat_group_ops,
2727 .ct_owner = THIS_MODULE,
2728};
2729
2730/* End functions for struct config_item_type target_core_stat_cit */
2731
c66ac9db
NB		 2732/* Start functions for struct config_item_type target_core_hba_cit */
2733
2734static struct config_group *target_core_make_subdev(
2735 struct config_group *group,
2736 const char *name)
2737{
2738 struct t10_alua_tg_pt_gp *tg_pt_gp;
2739 struct se_subsystem_dev *se_dev;
2740 struct se_subsystem_api *t;
2741 struct config_item *hba_ci = &group->cg_item;
2742 struct se_hba *hba = item_to_hba(hba_ci);
2743 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
12d23384
NB		 2744 struct config_group *dev_stat_grp = NULL;
2745 int errno = -ENOMEM, ret;
c66ac9db 2746
12d23384
NB		 2747 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2748 if (ret)
2749 return ERR_PTR(ret);
c66ac9db
NB		 2750 /*
2751 * Locate the struct se_subsystem_api from parent's struct se_hba.
2752 */
2753 t = hba->transport;
2754
2755 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2756 if (!se_dev) {
2757 printk(KERN_ERR "Unable to allocate memory for"
2758 " struct se_subsystem_dev\n");
2759 goto unlock;
2760 }
e3d6f909 2761 INIT_LIST_HEAD(&se_dev->se_dev_node);
c66ac9db
NB		 2762 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2763 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
e3d6f909
AG		 2764 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2765 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2766 spin_lock_init(&se_dev->t10_pr.registration_lock);
2767 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
c66ac9db
NB		 2768 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2769 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2770 spin_lock_init(&se_dev->se_dev_lock);
e3d6f909 2771 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
c66ac9db
NB		 2772 se_dev->t10_wwn.t10_sub_dev = se_dev;
2773 se_dev->t10_alua.t10_sub_dev = se_dev;
2774 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2775
2776 se_dev->se_dev_hba = hba;
2777 dev_cg = &se_dev->se_dev_group;
2778
12d23384 2779 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
c66ac9db
NB		 2780 GFP_KERNEL);
2781 if (!(dev_cg->default_groups))
2782 goto out;
2783 /*
2784 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2785 * for ->allocate_virtdevice()
2786 *
2787 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2788 * has been called successfully in the next level up in the
2789 * configfs tree for device object's struct config_group.
2790 */
2791 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2792 if (!(se_dev->se_dev_su_ptr)) {
2793 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2794 " from allocate_virtdevice()\n");
2795 goto out;
2796 }
e3d6f909
AG		 2797 spin_lock(&se_device_lock);
2798 list_add_tail(&se_dev->se_dev_node, &se_dev_list);
2799 spin_unlock(&se_device_lock);
c66ac9db
NB		 2800
2801 config_group_init_type_name(&se_dev->se_dev_group, name,
2802 &target_core_dev_cit);
2803 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2804 &target_core_dev_attrib_cit);
2805 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2806 &target_core_dev_pr_cit);
2807 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2808 &target_core_dev_wwn_cit);
2809 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2810 "alua", &target_core_alua_tg_pt_gps_cit);
12d23384
NB		 2811 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2812 "statistics", &target_core_stat_cit);
2813
c66ac9db
NB		 2814 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2815 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2816 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2817 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
12d23384
NB		 2818 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2819 dev_cg->default_groups[5] = NULL;
c66ac9db 2820 /*
12d23384 2821 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
c66ac9db
NB		 2822 */
2823 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2824 if (!(tg_pt_gp))
2825 goto out;
2826
e3d6f909 2827 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2828 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2829 GFP_KERNEL);
2830 if (!(tg_pt_gp_cg->default_groups)) {
2831 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2832 "default_groups\n");
2833 goto out;
2834 }
2835
2836 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2837 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2838 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2839 tg_pt_gp_cg->default_groups[1] = NULL;
e3d6f909 2840 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
12d23384
NB		 2841 /*
2842 * Add core/$HBA/$DEV/statistics/ default groups
2843 */
e3d6f909 2844 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
12d23384
NB		 2845 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2846 GFP_KERNEL);
2847 if (!dev_stat_grp->default_groups) {
2848 printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n");
2849 goto out;
2850 }
2851 target_stat_setup_dev_default_groups(se_dev);
c66ac9db
NB		 2852
2853 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2854 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2855
2856 mutex_unlock(&hba->hba_access_mutex);
2857 return &se_dev->se_dev_group;
2858out:
e3d6f909
AG		 2859 if (se_dev->t10_alua.default_tg_pt_gp) {
2860 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2861 se_dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db 2862 }
12d23384
NB		 2863 if (dev_stat_grp)
2864 kfree(dev_stat_grp->default_groups);
c66ac9db
NB		 2865 if (tg_pt_gp_cg)
2866 kfree(tg_pt_gp_cg->default_groups);
2867 if (dev_cg)
2868 kfree(dev_cg->default_groups);
2869 if (se_dev->se_dev_su_ptr)
2870 t->free_device(se_dev->se_dev_su_ptr);
2871 kfree(se_dev);
2872unlock:
2873 mutex_unlock(&hba->hba_access_mutex);
12d23384 2874 return ERR_PTR(errno);
c66ac9db
NB		 2875}
2876
2877static void target_core_drop_subdev(
2878 struct config_group *group,
2879 struct config_item *item)
2880{
2881 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2882 struct se_subsystem_dev, se_dev_group);
2883 struct se_hba *hba;
2884 struct se_subsystem_api *t;
2885 struct config_item *df_item;
12d23384 2886 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
1f6fe7cb 2887 int i;
c66ac9db
NB		 2888
2889 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2890
1f6fe7cb 2891 mutex_lock(&hba->hba_access_mutex);
c66ac9db
NB		 2892 t = hba->transport;
2893
e3d6f909
AG		 2894 spin_lock(&se_device_lock);
2895 list_del(&se_dev->se_dev_node);
2896 spin_unlock(&se_device_lock);
c66ac9db 2897
e3d6f909 2898 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
12d23384
NB		 2899 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2900 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2901 dev_stat_grp->default_groups[i] = NULL;
2902 config_item_put(df_item);
2903 }
2904 kfree(dev_stat_grp->default_groups);
2905
e3d6f909 2906 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
c66ac9db
NB		 2907 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2908 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2909 tg_pt_gp_cg->default_groups[i] = NULL;
2910 config_item_put(df_item);
2911 }
2912 kfree(tg_pt_gp_cg->default_groups);
1f6fe7cb
NB		 2913 /*
2914 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2915 * directly from target_core_alua_tg_pt_gp_release().
2916 */
e3d6f909 2917 se_dev->t10_alua.default_tg_pt_gp = NULL;
c66ac9db
NB		 2918
2919 dev_cg = &se_dev->se_dev_group;
2920 for (i = 0; dev_cg->default_groups[i]; i++) {
2921 df_item = &dev_cg->default_groups[i]->cg_item;
2922 dev_cg->default_groups[i] = NULL;
2923 config_item_put(df_item);
2924 }
c66ac9db 2925 /*
1f6fe7cb
NB		 2926 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2927 * from target_core_dev_item_ops->release() ->target_core_dev_release().
c66ac9db 2928 */
1f6fe7cb 2929 config_item_put(item);
c66ac9db 2930 mutex_unlock(&hba->hba_access_mutex);
c66ac9db
NB		 2931}
2932
2933static struct configfs_group_operations target_core_hba_group_ops = {
2934 .make_group = target_core_make_subdev,
2935 .drop_item = target_core_drop_subdev,
2936};
2937
2938CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2939#define SE_HBA_ATTR(_name, _mode) \
2940static struct target_core_hba_attribute \
2941 target_core_hba_##_name = \
2942 __CONFIGFS_EATTR(_name, _mode, \
2943 target_core_hba_show_attr_##_name, \
2944 target_core_hba_store_attr_##_name);
2945
2946#define SE_HBA_ATTR_RO(_name) \
2947static struct target_core_hba_attribute \
2948 target_core_hba_##_name = \
2949 __CONFIGFS_EATTR_RO(_name, \
2950 target_core_hba_show_attr_##_name);
2951
2952static ssize_t target_core_hba_show_attr_hba_info(
2953 struct se_hba *hba,
2954 char *page)
2955{
2956 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2957 hba->hba_id, hba->transport->name,
2958 TARGET_CORE_CONFIGFS_VERSION);
2959}
2960
2961SE_HBA_ATTR_RO(hba_info);
2962
2963static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2964 char *page)
2965{
2966 int hba_mode = 0;
2967
2968 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2969 hba_mode = 1;
2970
2971 return sprintf(page, "%d\n", hba_mode);
2972}
2973
2974static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2975 const char *page, size_t count)
2976{
2977 struct se_subsystem_api *transport = hba->transport;
2978 unsigned long mode_flag;
2979 int ret;
2980
2981 if (transport->pmode_enable_hba == NULL)
2982 return -EINVAL;
2983
2984 ret = strict_strtoul(page, 0, &mode_flag);
2985 if (ret < 0) {
2986 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2987 return -EINVAL;
2988 }
2989
2990 spin_lock(&hba->device_lock);
2991 if (!(list_empty(&hba->hba_dev_list))) {
2992 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2993 spin_unlock(&hba->device_lock);
2994 return -EINVAL;
2995 }
2996 spin_unlock(&hba->device_lock);
2997
2998 ret = transport->pmode_enable_hba(hba, mode_flag);
2999 if (ret < 0)
3000 return -EINVAL;
3001 if (ret > 0)
3002 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3003 else if (ret == 0)
3004 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3005
3006 return count;
3007}
3008
3009SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3010
3011CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3012
1f6fe7cb
NB		 3013static void target_core_hba_release(struct config_item *item)
3014{
3015 struct se_hba *hba = container_of(to_config_group(item),
3016 struct se_hba, hba_group);
3017 core_delete_hba(hba);
3018}
3019
c66ac9db
NB		 3020static struct configfs_attribute *target_core_hba_attrs[] = {
3021 &target_core_hba_hba_info.attr,
3022 &target_core_hba_hba_mode.attr,
3023 NULL,
3024};
3025
3026static struct configfs_item_operations target_core_hba_item_ops = {
1f6fe7cb 3027 .release = target_core_hba_release,
c66ac9db
NB		 3028 .show_attribute = target_core_hba_attr_show,
3029 .store_attribute = target_core_hba_attr_store,
3030};
3031
3032static struct config_item_type target_core_hba_cit = {
3033 .ct_item_ops = &target_core_hba_item_ops,
3034 .ct_group_ops = &target_core_hba_group_ops,
3035 .ct_attrs = target_core_hba_attrs,
3036 .ct_owner = THIS_MODULE,
3037};
3038
3039static struct config_group *target_core_call_addhbatotarget(
3040 struct config_group *group,
3041 const char *name)
3042{
3043 char *se_plugin_str, *str, *str2;
3044 struct se_hba *hba;
3045 char buf[TARGET_CORE_NAME_MAX_LEN];
3046 unsigned long plugin_dep_id = 0;
3047 int ret;
3048
3049 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
60d645a4 3050 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
c66ac9db
NB		 3051 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
3052 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3053 TARGET_CORE_NAME_MAX_LEN);
3054 return ERR_PTR(-ENAMETOOLONG);
3055 }
3056 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3057
3058 str = strstr(buf, "_");
3059 if (!(str)) {
3060 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3061 return ERR_PTR(-EINVAL);
3062 }
3063 se_plugin_str = buf;
3064 /*
3065 * Special case for subsystem plugins that have "_" in their names.
3066 * Namely rd_direct and rd_mcp..
3067 */
3068 str2 = strstr(str+1, "_");
3069 if ((str2)) {
3070 *str2 = '\0'; /* Terminate for *se_plugin_str */
3071 str2++; /* Skip to start of plugin dependent ID */
3072 str = str2;
3073 } else {
3074 *str = '\0'; /* Terminate for *se_plugin_str */
3075 str++; /* Skip to start of plugin dependent ID */
3076 }
3077
3078 ret = strict_strtoul(str, 0, &plugin_dep_id);
3079 if (ret < 0) {
3080 printk(KERN_ERR "strict_strtoul() returned %d for"
3081 " plugin_dep_id\n", ret);
3082 return ERR_PTR(-EINVAL);
3083 }
3084 /*
3085 * Load up TCM subsystem plugins if they have not already been loaded.
3086 */
3087 if (transport_subsystem_check_init() < 0)
3088 return ERR_PTR(-EINVAL);
3089
3090 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3091 if (IS_ERR(hba))
3092 return ERR_CAST(hba);
3093
3094 config_group_init_type_name(&hba->hba_group, name,
3095 &target_core_hba_cit);
3096
3097 return &hba->hba_group;
3098}
3099
3100static void target_core_call_delhbafromtarget(
3101 struct config_group *group,
3102 struct config_item *item)
3103{
1f6fe7cb
NB		 3104 /*
3105 * core_delete_hba() is called from target_core_hba_item_ops->release()
3106 * -> target_core_hba_release()
3107 */
c66ac9db 3108 config_item_put(item);
c66ac9db
NB		 3109}
3110
3111static struct configfs_group_operations target_core_group_ops = {
3112 .make_group = target_core_call_addhbatotarget,
3113 .drop_item = target_core_call_delhbafromtarget,
3114};
3115
3116static struct config_item_type target_core_cit = {
3117 .ct_item_ops = NULL,
3118 .ct_group_ops = &target_core_group_ops,
3119 .ct_attrs = NULL,
3120 .ct_owner = THIS_MODULE,
3121};
3122
3123/* Stop functions for struct config_item_type target_core_hba_cit */
3124
54550fab 3125static int __init target_core_init_configfs(void)
c66ac9db
NB		 3126{
3127 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3128 struct config_group *lu_gp_cg = NULL;
3129 struct configfs_subsystem *subsys;
c66ac9db
NB		 3130 struct t10_alua_lu_gp *lu_gp;
3131 int ret;
3132
3133 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3134 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3135 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3136
3137 subsys = target_core_subsystem[0];
3138 config_group_init(&subsys->su_group);
3139 mutex_init(&subsys->su_mutex);
3140
3141 INIT_LIST_HEAD(&g_tf_list);
3142 mutex_init(&g_tf_lock);
e3d6f909 3143 ret = init_se_kmem_caches();
c66ac9db 3144 if (ret < 0)
e3d6f909 3145 return ret;
c66ac9db
NB		 3146 /*
3147 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3148 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3149 */
3150 target_cg = &subsys->su_group;
3151 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3152 GFP_KERNEL);
3153 if (!(target_cg->default_groups)) {
3154 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3155 goto out_global;
3156 }
3157
e3d6f909 3158 config_group_init_type_name(&target_core_hbagroup,
c66ac9db 3159 "core", &target_core_cit);
e3d6f909 3160 target_cg->default_groups[0] = &target_core_hbagroup;
c66ac9db
NB		 3161 target_cg->default_groups[1] = NULL;
3162 /*
3163 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3164 */
e3d6f909 3165 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3166 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3167 GFP_KERNEL);
3168 if (!(hba_cg->default_groups)) {
3169 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3170 goto out_global;
3171 }
e3d6f909 3172 config_group_init_type_name(&alua_group,
c66ac9db 3173 "alua", &target_core_alua_cit);
e3d6f909 3174 hba_cg->default_groups[0] = &alua_group;
c66ac9db
NB		 3175 hba_cg->default_groups[1] = NULL;
3176 /*
3177 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3178 * groups under /sys/kernel/config/target/core/alua/
3179 */
e3d6f909 3180 alua_cg = &alua_group;
c66ac9db
NB		 3181 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3182 GFP_KERNEL);
3183 if (!(alua_cg->default_groups)) {
3184 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3185 goto out_global;
3186 }
3187
e3d6f909 3188 config_group_init_type_name(&alua_lu_gps_group,
c66ac9db 3189 "lu_gps", &target_core_alua_lu_gps_cit);
e3d6f909 3190 alua_cg->default_groups[0] = &alua_lu_gps_group;
c66ac9db
NB		 3191 alua_cg->default_groups[1] = NULL;
3192 /*
3193 * Add core/alua/lu_gps/default_lu_gp
3194 */
3195 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3196 if (IS_ERR(lu_gp))
3197 goto out_global;
3198
e3d6f909 3199 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3200 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3201 GFP_KERNEL);
3202 if (!(lu_gp_cg->default_groups)) {
3203 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3204 goto out_global;
3205 }
3206
3207 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3208 &target_core_alua_lu_gp_cit);
3209 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3210 lu_gp_cg->default_groups[1] = NULL;
e3d6f909 3211 default_lu_gp = lu_gp;
c66ac9db
NB		 3212 /*
3213 * Register the target_core_mod subsystem with configfs.
3214 */
3215 ret = configfs_register_subsystem(subsys);
3216 if (ret < 0) {
3217 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3218 ret, subsys->su_group.cg_item.ci_namebuf);
3219 goto out_global;
3220 }
3221 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3222 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3223 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3224 /*
3225 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3226 */
3227 ret = rd_module_init();
3228 if (ret < 0)
3229 goto out;
3230
3231 if (core_dev_setup_virtual_lun0() < 0)
3232 goto out;
3233
c66ac9db
NB		 3234 return 0;
3235
3236out:
3237 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3238 core_dev_release_virtual_lun0();
3239 rd_module_exit();
3240out_global:
e3d6f909
AG		 3241 if (default_lu_gp) {
3242 core_alua_free_lu_gp(default_lu_gp);
3243 default_lu_gp = NULL;
c66ac9db
NB		 3244 }
3245 if (lu_gp_cg)
3246 kfree(lu_gp_cg->default_groups);
3247 if (alua_cg)
3248 kfree(alua_cg->default_groups);
3249 if (hba_cg)
3250 kfree(hba_cg->default_groups);
3251 kfree(target_cg->default_groups);
e3d6f909
AG		 3252 release_se_kmem_caches();
3253 return ret;
c66ac9db
NB		 3254}
3255
54550fab 3256static void __exit target_core_exit_configfs(void)
c66ac9db
NB		 3257{
3258 struct configfs_subsystem *subsys;
3259 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3260 struct config_item *item;
3261 int i;
3262
c66ac9db
NB		 3263 subsys = target_core_subsystem[0];
3264
e3d6f909 3265 lu_gp_cg = &alua_lu_gps_group;
c66ac9db
NB		 3266 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3267 item = &lu_gp_cg->default_groups[i]->cg_item;
3268 lu_gp_cg->default_groups[i] = NULL;
3269 config_item_put(item);
3270 }
3271 kfree(lu_gp_cg->default_groups);
7c2bf6e9 3272 lu_gp_cg->default_groups = NULL;
c66ac9db 3273
e3d6f909 3274 alua_cg = &alua_group;
c66ac9db
NB		 3275 for (i = 0; alua_cg->default_groups[i]; i++) {
3276 item = &alua_cg->default_groups[i]->cg_item;
3277 alua_cg->default_groups[i] = NULL;
3278 config_item_put(item);
3279 }
3280 kfree(alua_cg->default_groups);
7c2bf6e9 3281 alua_cg->default_groups = NULL;
c66ac9db 3282
e3d6f909 3283 hba_cg = &target_core_hbagroup;
c66ac9db
NB		 3284 for (i = 0; hba_cg->default_groups[i]; i++) {
3285 item = &hba_cg->default_groups[i]->cg_item;
3286 hba_cg->default_groups[i] = NULL;
3287 config_item_put(item);
3288 }
3289 kfree(hba_cg->default_groups);
7c2bf6e9
NB		 3290 hba_cg->default_groups = NULL;
3291 /*
3292 * We expect subsys->su_group.default_groups to be released
3293 * by configfs subsystem provider logic..
3294 */
3295 configfs_unregister_subsystem(subsys);
c66ac9db
NB		 3296 kfree(subsys->su_group.default_groups);
3297
e3d6f909
AG		 3298 core_alua_free_lu_gp(default_lu_gp);
3299 default_lu_gp = NULL;
7c2bf6e9 3300
c66ac9db
NB		 3301 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3302 " Infrastructure\n");
3303
c66ac9db
NB		 3304 core_dev_release_virtual_lun0();
3305 rd_module_exit();
e3d6f909 3306 release_se_kmem_caches();
c66ac9db
NB		 3307}
3308
3309MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3310MODULE_AUTHOR("nab@Linux-iSCSI.org");
3311MODULE_LICENSE("GPL");
3312
3313module_init(target_core_init_configfs);
3314module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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