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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / target / target_core_configfs.c
blob0955bb8979fb6f77dc54bf500810db4c83615f91
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
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 <generated/utsrelease.h>
27 #include <linux/utsname.h>
28 #include <linux/init.h>
29 #include <linux/fs.h>
30 #include <linux/namei.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/delay.h>
34 #include <linux/unistd.h>
35 #include <linux/string.h>
36 #include <linux/parser.h>
37 #include <linux/syscalls.h>
38 #include <linux/configfs.h>
39 #include <linux/spinlock.h>
40
41 #include <target/target_core_base.h>
42 #include <target/target_core_backend.h>
43 #include <target/target_core_fabric.h>
44 #include <target/target_core_fabric_configfs.h>
45 #include <target/target_core_configfs.h>
46 #include <target/configfs_macros.h>
47
48 #include "target_core_internal.h"
49 #include "target_core_alua.h"
50 #include "target_core_pr.h"
51 #include "target_core_rd.h"
52
53 extern struct t10_alua_lu_gp *default_lu_gp;
54
55 static struct list_head g_tf_list;
56 static struct mutex g_tf_lock;
57
58 struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62 };
63
64 static struct config_group target_core_hbagroup;
65 static struct config_group alua_group;
66 static struct config_group alua_lu_gps_group;
67
68 static inline struct se_hba *
69 item_to_hba(struct config_item *item)
70 {
71 return container_of(to_config_group(item), struct se_hba, hba_group);
72 }
73
74 /*
75 * Attributes for /sys/kernel/config/target/
76 */
77 static ssize_t target_core_attr_show(struct config_item *item,
78 struct configfs_attribute *attr,
79 char *page)
80 {
81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
83 utsname()->sysname, utsname()->machine);
84 }
85
86 static struct configfs_item_operations target_core_fabric_item_ops = {
87 .show_attribute = target_core_attr_show,
88 };
89
90 static struct configfs_attribute target_core_item_attr_version = {
91 .ca_owner = THIS_MODULE,
92 .ca_name = "version",
93 .ca_mode = S_IRUGO,
94 };
95
96 static struct target_fabric_configfs *target_core_get_fabric(
97 const char *name)
98 {
99 struct target_fabric_configfs *tf;
100
101 if (!name)
102 return NULL;
103
104 mutex_lock(&g_tf_lock);
105 list_for_each_entry(tf, &g_tf_list, tf_list) {
106 if (!strcmp(tf->tf_name, name)) {
107 atomic_inc(&tf->tf_access_cnt);
108 mutex_unlock(&g_tf_lock);
109 return tf;
110 }
111 }
112 mutex_unlock(&g_tf_lock);
113
114 return NULL;
115 }
116
117 /*
118 * Called from struct target_core_group_ops->make_group()
119 */
120 static struct config_group *target_core_register_fabric(
121 struct config_group *group,
122 const char *name)
123 {
124 struct target_fabric_configfs *tf;
125 int ret;
126
127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
128 " %s\n", group, name);
129 /*
130 * Below are some hardcoded request_module() calls to automatically
131 * local fabric modules when the following is called:
132 *
133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134 *
135 * Note that this does not limit which TCM fabric module can be
136 * registered, but simply provids auto loading logic for modules with
137 * mkdir(2) system calls with known TCM fabric modules.
138 */
139 if (!strncmp(name, "iscsi", 5)) {
140 /*
141 * Automatically load the LIO Target fabric module when the
142 * following is called:
143 *
144 * mkdir -p $CONFIGFS/target/iscsi
145 */
146 ret = request_module("iscsi_target_mod");
147 if (ret < 0) {
148 pr_err("request_module() failed for"
149 " iscsi_target_mod.ko: %d\n", ret);
150 return ERR_PTR(-EINVAL);
151 }
152 } else if (!strncmp(name, "loopback", 8)) {
153 /*
154 * Automatically load the tcm_loop fabric module when the
155 * following is called:
156 *
157 * mkdir -p $CONFIGFS/target/loopback
158 */
159 ret = request_module("tcm_loop");
160 if (ret < 0) {
161 pr_err("request_module() failed for"
162 " tcm_loop.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 }
166
167 tf = target_core_get_fabric(name);
168 if (!tf) {
169 pr_err("target_core_get_fabric() failed for %s\n",
170 name);
171 return ERR_PTR(-EINVAL);
172 }
173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
174 " %s\n", tf->tf_name);
175 /*
176 * On a successful target_core_get_fabric() look, the returned
177 * struct target_fabric_configfs *tf will contain a usage reference.
178 */
179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
180 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
181
182 tf->tf_group.default_groups = tf->tf_default_groups;
183 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
184 tf->tf_group.default_groups[1] = NULL;
185
186 config_group_init_type_name(&tf->tf_group, name,
187 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
189 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
190
191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
192 " %s\n", tf->tf_group.cg_item.ci_name);
193 /*
194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
195 */
196 tf->tf_ops.tf_subsys = tf->tf_subsys;
197 tf->tf_fabric = &tf->tf_group.cg_item;
198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
199 " for %s\n", name);
200
201 return &tf->tf_group;
202 }
203
204 /*
205 * Called from struct target_core_group_ops->drop_item()
206 */
207 static void target_core_deregister_fabric(
208 struct config_group *group,
209 struct config_item *item)
210 {
211 struct target_fabric_configfs *tf = container_of(
212 to_config_group(item), struct target_fabric_configfs, tf_group);
213 struct config_group *tf_group;
214 struct config_item *df_item;
215 int i;
216
217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
218 " tf list\n", config_item_name(item));
219
220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
221 " %s\n", tf->tf_name);
222 atomic_dec(&tf->tf_access_cnt);
223
224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
225 " tf->tf_fabric for %s\n", tf->tf_name);
226 tf->tf_fabric = NULL;
227
228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
229 " %s\n", config_item_name(item));
230
231 tf_group = &tf->tf_group;
232 for (i = 0; tf_group->default_groups[i]; i++) {
233 df_item = &tf_group->default_groups[i]->cg_item;
234 tf_group->default_groups[i] = NULL;
235 config_item_put(df_item);
236 }
237 config_item_put(item);
238 }
239
240 static struct configfs_group_operations target_core_fabric_group_ops = {
241 .make_group = &target_core_register_fabric,
242 .drop_item = &target_core_deregister_fabric,
243 };
244
245 /*
246 * All item attributes appearing in /sys/kernel/target/ appear here.
247 */
248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249 &target_core_item_attr_version,
250 NULL,
251 };
252
253 /*
254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255 */
256 static struct config_item_type target_core_fabrics_item = {
257 .ct_item_ops = &target_core_fabric_item_ops,
258 .ct_group_ops = &target_core_fabric_group_ops,
259 .ct_attrs = target_core_fabric_item_attrs,
260 .ct_owner = THIS_MODULE,
261 };
262
263 static struct configfs_subsystem target_core_fabrics = {
264 .su_group = {
265 .cg_item = {
266 .ci_namebuf = "target",
267 .ci_type = &target_core_fabrics_item,
268 },
269 },
270 };
271
272 static struct configfs_subsystem *target_core_subsystem[] = {
273 &target_core_fabrics,
274 NULL,
275 };
276
277 /*##############################################################################
278 // Start functions called by external Target Fabrics Modules
279 //############################################################################*/
280
281 /*
282 * First function called by fabric modules to:
283 *
284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285 * 2) Add struct target_fabric_configfs to g_tf_list
286 * 3) Return struct target_fabric_configfs to fabric module to be passed
287 * into target_fabric_configfs_register().
288 */
289 struct target_fabric_configfs *target_fabric_configfs_init(
290 struct module *fabric_mod,
291 const char *name)
292 {
293 struct target_fabric_configfs *tf;
294
295 if (!(name)) {
296 pr_err("Unable to locate passed fabric name\n");
297 return ERR_PTR(-EINVAL);
298 }
299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
301 "_NAME_SIZE\n", name);
302 return ERR_PTR(-EINVAL);
303 }
304
305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
306 if (!tf)
307 return ERR_PTR(-ENOMEM);
308
309 INIT_LIST_HEAD(&tf->tf_list);
310 atomic_set(&tf->tf_access_cnt, 0);
311 /*
312 * Setup the default generic struct config_item_type's (cits) in
313 * struct target_fabric_configfs->tf_cit_tmpl
314 */
315 tf->tf_module = fabric_mod;
316 target_fabric_setup_cits(tf);
317
318 tf->tf_subsys = target_core_subsystem[0];
319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
320
321 mutex_lock(&g_tf_lock);
322 list_add_tail(&tf->tf_list, &g_tf_list);
323 mutex_unlock(&g_tf_lock);
324
325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
326 ">>>>>>>>>>>>>>\n");
327 pr_debug("Initialized struct target_fabric_configfs: %p for"
328 " %s\n", tf, tf->tf_name);
329 return tf;
330 }
331 EXPORT_SYMBOL(target_fabric_configfs_init);
332
333 /*
334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335 */
336 void target_fabric_configfs_free(
337 struct target_fabric_configfs *tf)
338 {
339 mutex_lock(&g_tf_lock);
340 list_del(&tf->tf_list);
341 mutex_unlock(&g_tf_lock);
342
343 kfree(tf);
344 }
345 EXPORT_SYMBOL(target_fabric_configfs_free);
346
347 /*
348 * Perform a sanity check of the passed tf->tf_ops before completing
349 * TCM fabric module registration.
350 */
351 static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs *tf)
353 {
354 struct target_core_fabric_ops *tfo = &tf->tf_ops;
355
356 if (!tfo->get_fabric_name) {
357 pr_err("Missing tfo->get_fabric_name()\n");
358 return -EINVAL;
359 }
360 if (!tfo->get_fabric_proto_ident) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_get_default_depth) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_get_pr_transport_id) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_pr_transport_id_len) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
382 return -EINVAL;
383 }
384 if (!tfo->tpg_check_demo_mode) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
386 return -EINVAL;
387 }
388 if (!tfo->tpg_check_demo_mode_cache) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
390 return -EINVAL;
391 }
392 if (!tfo->tpg_check_demo_mode_write_protect) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
394 return -EINVAL;
395 }
396 if (!tfo->tpg_check_prod_mode_write_protect) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
398 return -EINVAL;
399 }
400 if (!tfo->tpg_alloc_fabric_acl) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
402 return -EINVAL;
403 }
404 if (!tfo->tpg_release_fabric_acl) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
406 return -EINVAL;
407 }
408 if (!tfo->tpg_get_inst_index) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
410 return -EINVAL;
411 }
412 if (!tfo->release_cmd) {
413 pr_err("Missing tfo->release_cmd()\n");
414 return -EINVAL;
415 }
416 if (!tfo->shutdown_session) {
417 pr_err("Missing tfo->shutdown_session()\n");
418 return -EINVAL;
419 }
420 if (!tfo->close_session) {
421 pr_err("Missing tfo->close_session()\n");
422 return -EINVAL;
423 }
424 if (!tfo->stop_session) {
425 pr_err("Missing tfo->stop_session()\n");
426 return -EINVAL;
427 }
428 if (!tfo->fall_back_to_erl0) {
429 pr_err("Missing tfo->fall_back_to_erl0()\n");
430 return -EINVAL;
431 }
432 if (!tfo->sess_logged_in) {
433 pr_err("Missing tfo->sess_logged_in()\n");
434 return -EINVAL;
435 }
436 if (!tfo->sess_get_index) {
437 pr_err("Missing tfo->sess_get_index()\n");
438 return -EINVAL;
439 }
440 if (!tfo->write_pending) {
441 pr_err("Missing tfo->write_pending()\n");
442 return -EINVAL;
443 }
444 if (!tfo->write_pending_status) {
445 pr_err("Missing tfo->write_pending_status()\n");
446 return -EINVAL;
447 }
448 if (!tfo->set_default_node_attributes) {
449 pr_err("Missing tfo->set_default_node_attributes()\n");
450 return -EINVAL;
451 }
452 if (!tfo->get_task_tag) {
453 pr_err("Missing tfo->get_task_tag()\n");
454 return -EINVAL;
455 }
456 if (!tfo->get_cmd_state) {
457 pr_err("Missing tfo->get_cmd_state()\n");
458 return -EINVAL;
459 }
460 if (!tfo->queue_data_in) {
461 pr_err("Missing tfo->queue_data_in()\n");
462 return -EINVAL;
463 }
464 if (!tfo->queue_status) {
465 pr_err("Missing tfo->queue_status()\n");
466 return -EINVAL;
467 }
468 if (!tfo->queue_tm_rsp) {
469 pr_err("Missing tfo->queue_tm_rsp()\n");
470 return -EINVAL;
471 }
472 if (!tfo->set_fabric_sense_len) {
473 pr_err("Missing tfo->set_fabric_sense_len()\n");
474 return -EINVAL;
475 }
476 if (!tfo->get_fabric_sense_len) {
477 pr_err("Missing tfo->get_fabric_sense_len()\n");
478 return -EINVAL;
479 }
480 if (!tfo->is_state_remove) {
481 pr_err("Missing tfo->is_state_remove()\n");
482 return -EINVAL;
483 }
484 /*
485 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
486 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
487 * target_core_fabric_configfs.c WWN+TPG group context code.
488 */
489 if (!tfo->fabric_make_wwn) {
490 pr_err("Missing tfo->fabric_make_wwn()\n");
491 return -EINVAL;
492 }
493 if (!tfo->fabric_drop_wwn) {
494 pr_err("Missing tfo->fabric_drop_wwn()\n");
495 return -EINVAL;
496 }
497 if (!tfo->fabric_make_tpg) {
498 pr_err("Missing tfo->fabric_make_tpg()\n");
499 return -EINVAL;
500 }
501 if (!tfo->fabric_drop_tpg) {
502 pr_err("Missing tfo->fabric_drop_tpg()\n");
503 return -EINVAL;
504 }
505
506 return 0;
507 }
508
509 /*
510 * Called 2nd from fabric module with returned parameter of
511 * struct target_fabric_configfs * from target_fabric_configfs_init().
512 *
513 * Upon a successful registration, the new fabric's struct config_item is
514 * return. Also, a pointer to this struct is set in the passed
515 * struct target_fabric_configfs.
516 */
517 int target_fabric_configfs_register(
518 struct target_fabric_configfs *tf)
519 {
520 int ret;
521
522 if (!tf) {
523 pr_err("Unable to locate target_fabric_configfs"
524 " pointer\n");
525 return -EINVAL;
526 }
527 if (!tf->tf_subsys) {
528 pr_err("Unable to target struct config_subsystem"
529 " pointer\n");
530 return -EINVAL;
531 }
532 ret = target_fabric_tf_ops_check(tf);
533 if (ret < 0)
534 return ret;
535
536 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
537 ">>>>>>>>>>\n");
538 return 0;
539 }
540 EXPORT_SYMBOL(target_fabric_configfs_register);
541
542 void target_fabric_configfs_deregister(
543 struct target_fabric_configfs *tf)
544 {
545 struct configfs_subsystem *su;
546
547 if (!tf) {
548 pr_err("Unable to locate passed target_fabric_"
549 "configfs\n");
550 return;
551 }
552 su = tf->tf_subsys;
553 if (!su) {
554 pr_err("Unable to locate passed tf->tf_subsys"
555 " pointer\n");
556 return;
557 }
558 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
559 ">>>>>>>>>>>>\n");
560 mutex_lock(&g_tf_lock);
561 if (atomic_read(&tf->tf_access_cnt)) {
562 mutex_unlock(&g_tf_lock);
563 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
564 tf->tf_name);
565 BUG();
566 }
567 list_del(&tf->tf_list);
568 mutex_unlock(&g_tf_lock);
569
570 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
571 " %s\n", tf->tf_name);
572 tf->tf_module = NULL;
573 tf->tf_subsys = NULL;
574 kfree(tf);
575
576 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
577 ">>>>>\n");
578 }
579 EXPORT_SYMBOL(target_fabric_configfs_deregister);
580
581 /*##############################################################################
582 // Stop functions called by external Target Fabrics Modules
583 //############################################################################*/
584
585 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
586
587 #define DEF_DEV_ATTRIB_SHOW(_name) \
588 static ssize_t target_core_dev_show_attr_##_name( \
589 struct se_dev_attrib *da, \
590 char *page) \
591 { \
592 struct se_device *dev; \
593 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
594 ssize_t rb; \
595 \
596 spin_lock(&se_dev->se_dev_lock); \
597 dev = se_dev->se_dev_ptr; \
598 if (!dev) { \
599 spin_unlock(&se_dev->se_dev_lock); \
600 return -ENODEV; \
601 } \
602 rb = snprintf(page, PAGE_SIZE, "%u\n", \
603 (u32)dev->se_sub_dev->se_dev_attrib._name); \
604 spin_unlock(&se_dev->se_dev_lock); \
605 \
606 return rb; \
607 }
608
609 #define DEF_DEV_ATTRIB_STORE(_name) \
610 static ssize_t target_core_dev_store_attr_##_name( \
611 struct se_dev_attrib *da, \
612 const char *page, \
613 size_t count) \
614 { \
615 struct se_device *dev; \
616 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
617 unsigned long val; \
618 int ret; \
619 \
620 spin_lock(&se_dev->se_dev_lock); \
621 dev = se_dev->se_dev_ptr; \
622 if (!dev) { \
623 spin_unlock(&se_dev->se_dev_lock); \
624 return -ENODEV; \
625 } \
626 ret = strict_strtoul(page, 0, &val); \
627 if (ret < 0) { \
628 spin_unlock(&se_dev->se_dev_lock); \
629 pr_err("strict_strtoul() failed with" \
630 " ret: %d\n", ret); \
631 return -EINVAL; \
632 } \
633 ret = se_dev_set_##_name(dev, (u32)val); \
634 spin_unlock(&se_dev->se_dev_lock); \
635 \
636 return (!ret) ? count : -EINVAL; \
637 }
638
639 #define DEF_DEV_ATTRIB(_name) \
640 DEF_DEV_ATTRIB_SHOW(_name); \
641 DEF_DEV_ATTRIB_STORE(_name);
642
643 #define DEF_DEV_ATTRIB_RO(_name) \
644 DEF_DEV_ATTRIB_SHOW(_name);
645
646 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
647 #define SE_DEV_ATTR(_name, _mode) \
648 static struct target_core_dev_attrib_attribute \
649 target_core_dev_attrib_##_name = \
650 __CONFIGFS_EATTR(_name, _mode, \
651 target_core_dev_show_attr_##_name, \
652 target_core_dev_store_attr_##_name);
653
654 #define SE_DEV_ATTR_RO(_name); \
655 static struct target_core_dev_attrib_attribute \
656 target_core_dev_attrib_##_name = \
657 __CONFIGFS_EATTR_RO(_name, \
658 target_core_dev_show_attr_##_name);
659
660 DEF_DEV_ATTRIB(emulate_dpo);
661 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
662
663 DEF_DEV_ATTRIB(emulate_fua_write);
664 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
665
666 DEF_DEV_ATTRIB(emulate_fua_read);
667 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
668
669 DEF_DEV_ATTRIB(emulate_write_cache);
670 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
671
672 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
673 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
674
675 DEF_DEV_ATTRIB(emulate_tas);
676 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
677
678 DEF_DEV_ATTRIB(emulate_tpu);
679 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
680
681 DEF_DEV_ATTRIB(emulate_tpws);
682 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
683
684 DEF_DEV_ATTRIB(enforce_pr_isids);
685 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
686
687 DEF_DEV_ATTRIB(is_nonrot);
688 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
689
690 DEF_DEV_ATTRIB(emulate_rest_reord);
691 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
692
693 DEF_DEV_ATTRIB_RO(hw_block_size);
694 SE_DEV_ATTR_RO(hw_block_size);
695
696 DEF_DEV_ATTRIB(block_size);
697 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
698
699 DEF_DEV_ATTRIB_RO(hw_max_sectors);
700 SE_DEV_ATTR_RO(hw_max_sectors);
701
702 DEF_DEV_ATTRIB(max_sectors);
703 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
704
705 DEF_DEV_ATTRIB(optimal_sectors);
706 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
707
708 DEF_DEV_ATTRIB_RO(hw_queue_depth);
709 SE_DEV_ATTR_RO(hw_queue_depth);
710
711 DEF_DEV_ATTRIB(queue_depth);
712 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
713
714 DEF_DEV_ATTRIB(max_unmap_lba_count);
715 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
716
717 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
718 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
719
720 DEF_DEV_ATTRIB(unmap_granularity);
721 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
722
723 DEF_DEV_ATTRIB(unmap_granularity_alignment);
724 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
725
726 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
727
728 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
729 &target_core_dev_attrib_emulate_dpo.attr,
730 &target_core_dev_attrib_emulate_fua_write.attr,
731 &target_core_dev_attrib_emulate_fua_read.attr,
732 &target_core_dev_attrib_emulate_write_cache.attr,
733 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
734 &target_core_dev_attrib_emulate_tas.attr,
735 &target_core_dev_attrib_emulate_tpu.attr,
736 &target_core_dev_attrib_emulate_tpws.attr,
737 &target_core_dev_attrib_enforce_pr_isids.attr,
738 &target_core_dev_attrib_is_nonrot.attr,
739 &target_core_dev_attrib_emulate_rest_reord.attr,
740 &target_core_dev_attrib_hw_block_size.attr,
741 &target_core_dev_attrib_block_size.attr,
742 &target_core_dev_attrib_hw_max_sectors.attr,
743 &target_core_dev_attrib_max_sectors.attr,
744 &target_core_dev_attrib_optimal_sectors.attr,
745 &target_core_dev_attrib_hw_queue_depth.attr,
746 &target_core_dev_attrib_queue_depth.attr,
747 &target_core_dev_attrib_max_unmap_lba_count.attr,
748 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
749 &target_core_dev_attrib_unmap_granularity.attr,
750 &target_core_dev_attrib_unmap_granularity_alignment.attr,
751 NULL,
752 };
753
754 static struct configfs_item_operations target_core_dev_attrib_ops = {
755 .show_attribute = target_core_dev_attrib_attr_show,
756 .store_attribute = target_core_dev_attrib_attr_store,
757 };
758
759 static struct config_item_type target_core_dev_attrib_cit = {
760 .ct_item_ops = &target_core_dev_attrib_ops,
761 .ct_attrs = target_core_dev_attrib_attrs,
762 .ct_owner = THIS_MODULE,
763 };
764
765 /* End functions for struct config_item_type target_core_dev_attrib_cit */
766
767 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
768
769 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
770 #define SE_DEV_WWN_ATTR(_name, _mode) \
771 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
772 __CONFIGFS_EATTR(_name, _mode, \
773 target_core_dev_wwn_show_attr_##_name, \
774 target_core_dev_wwn_store_attr_##_name);
775
776 #define SE_DEV_WWN_ATTR_RO(_name); \
777 do { \
778 static struct target_core_dev_wwn_attribute \
779 target_core_dev_wwn_##_name = \
780 __CONFIGFS_EATTR_RO(_name, \
781 target_core_dev_wwn_show_attr_##_name); \
782 } while (0);
783
784 /*
785 * VPD page 0x80 Unit serial
786 */
787 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
788 struct t10_wwn *t10_wwn,
789 char *page)
790 {
791 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
792 struct se_device *dev;
793
794 dev = se_dev->se_dev_ptr;
795 if (!dev)
796 return -ENODEV;
797
798 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
799 &t10_wwn->unit_serial[0]);
800 }
801
802 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
803 struct t10_wwn *t10_wwn,
804 const char *page,
805 size_t count)
806 {
807 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
808 struct se_device *dev;
809 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
810
811 /*
812 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
813 * from the struct scsi_device level firmware, do not allow
814 * VPD Unit Serial to be emulated.
815 *
816 * Note this struct scsi_device could also be emulating VPD
817 * information from its drivers/scsi LLD. But for now we assume
818 * it is doing 'the right thing' wrt a world wide unique
819 * VPD Unit Serial Number that OS dependent multipath can depend on.
820 */
821 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
822 pr_err("Underlying SCSI device firmware provided VPD"
823 " Unit Serial, ignoring request\n");
824 return -EOPNOTSUPP;
825 }
826
827 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
828 pr_err("Emulated VPD Unit Serial exceeds"
829 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
830 return -EOVERFLOW;
831 }
832 /*
833 * Check to see if any active $FABRIC_MOD exports exist. If they
834 * do exist, fail here as changing this information on the fly
835 * (underneath the initiator side OS dependent multipath code)
836 * could cause negative effects.
837 */
838 dev = su_dev->se_dev_ptr;
839 if (dev) {
840 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
841 pr_err("Unable to set VPD Unit Serial while"
842 " active %d $FABRIC_MOD exports exist\n",
843 atomic_read(&dev->dev_export_obj.obj_access_count));
844 return -EINVAL;
845 }
846 }
847 /*
848 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
849 *
850 * Also, strip any newline added from the userspace
851 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
852 */
853 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
854 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
855 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
856 "%s", strstrip(buf));
857 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
858
859 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
860 " %s\n", su_dev->t10_wwn.unit_serial);
861
862 return count;
863 }
864
865 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
866
867 /*
868 * VPD page 0x83 Protocol Identifier
869 */
870 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
871 struct t10_wwn *t10_wwn,
872 char *page)
873 {
874 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
875 struct se_device *dev;
876 struct t10_vpd *vpd;
877 unsigned char buf[VPD_TMP_BUF_SIZE];
878 ssize_t len = 0;
879
880 dev = se_dev->se_dev_ptr;
881 if (!dev)
882 return -ENODEV;
883
884 memset(buf, 0, VPD_TMP_BUF_SIZE);
885
886 spin_lock(&t10_wwn->t10_vpd_lock);
887 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
888 if (!vpd->protocol_identifier_set)
889 continue;
890
891 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
892
893 if (len + strlen(buf) >= PAGE_SIZE)
894 break;
895
896 len += sprintf(page+len, "%s", buf);
897 }
898 spin_unlock(&t10_wwn->t10_vpd_lock);
899
900 return len;
901 }
902
903 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
904 struct t10_wwn *t10_wwn,
905 const char *page,
906 size_t count)
907 {
908 return -ENOSYS;
909 }
910
911 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
912
913 /*
914 * Generic wrapper for dumping VPD identifiers by association.
915 */
916 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
917 static ssize_t target_core_dev_wwn_show_attr_##_name( \
918 struct t10_wwn *t10_wwn, \
919 char *page) \
920 { \
921 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
922 struct se_device *dev; \
923 struct t10_vpd *vpd; \
924 unsigned char buf[VPD_TMP_BUF_SIZE]; \
925 ssize_t len = 0; \
926 \
927 dev = se_dev->se_dev_ptr; \
928 if (!dev) \
929 return -ENODEV; \
930 \
931 spin_lock(&t10_wwn->t10_vpd_lock); \
932 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
933 if (vpd->association != _assoc) \
934 continue; \
935 \
936 memset(buf, 0, VPD_TMP_BUF_SIZE); \
937 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
938 if (len + strlen(buf) >= PAGE_SIZE) \
939 break; \
940 len += sprintf(page+len, "%s", buf); \
941 \
942 memset(buf, 0, VPD_TMP_BUF_SIZE); \
943 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
944 if (len + strlen(buf) >= PAGE_SIZE) \
945 break; \
946 len += sprintf(page+len, "%s", buf); \
947 \
948 memset(buf, 0, VPD_TMP_BUF_SIZE); \
949 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
950 if (len + strlen(buf) >= PAGE_SIZE) \
951 break; \
952 len += sprintf(page+len, "%s", buf); \
953 } \
954 spin_unlock(&t10_wwn->t10_vpd_lock); \
955 \
956 return len; \
957 }
958
959 /*
960 * VPD page 0x83 Association: Logical Unit
961 */
962 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
963
964 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
965 struct t10_wwn *t10_wwn,
966 const char *page,
967 size_t count)
968 {
969 return -ENOSYS;
970 }
971
972 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
973
974 /*
975 * VPD page 0x83 Association: Target Port
976 */
977 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
978
979 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
980 struct t10_wwn *t10_wwn,
981 const char *page,
982 size_t count)
983 {
984 return -ENOSYS;
985 }
986
987 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
988
989 /*
990 * VPD page 0x83 Association: SCSI Target Device
991 */
992 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
993
994 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
995 struct t10_wwn *t10_wwn,
996 const char *page,
997 size_t count)
998 {
999 return -ENOSYS;
1000 }
1001
1002 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1003
1004 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1005
1006 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1007 &target_core_dev_wwn_vpd_unit_serial.attr,
1008 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1009 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1010 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1011 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1012 NULL,
1013 };
1014
1015 static struct configfs_item_operations target_core_dev_wwn_ops = {
1016 .show_attribute = target_core_dev_wwn_attr_show,
1017 .store_attribute = target_core_dev_wwn_attr_store,
1018 };
1019
1020 static struct config_item_type target_core_dev_wwn_cit = {
1021 .ct_item_ops = &target_core_dev_wwn_ops,
1022 .ct_attrs = target_core_dev_wwn_attrs,
1023 .ct_owner = THIS_MODULE,
1024 };
1025
1026 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1027
1028 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1029
1030 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1031 #define SE_DEV_PR_ATTR(_name, _mode) \
1032 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1033 __CONFIGFS_EATTR(_name, _mode, \
1034 target_core_dev_pr_show_attr_##_name, \
1035 target_core_dev_pr_store_attr_##_name);
1036
1037 #define SE_DEV_PR_ATTR_RO(_name); \
1038 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1039 __CONFIGFS_EATTR_RO(_name, \
1040 target_core_dev_pr_show_attr_##_name);
1041
1042 /*
1043 * res_holder
1044 */
1045 static ssize_t target_core_dev_pr_show_spc3_res(
1046 struct se_device *dev,
1047 char *page,
1048 ssize_t *len)
1049 {
1050 struct se_node_acl *se_nacl;
1051 struct t10_pr_registration *pr_reg;
1052 char i_buf[PR_REG_ISID_ID_LEN];
1053 int prf_isid;
1054
1055 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1056
1057 spin_lock(&dev->dev_reservation_lock);
1058 pr_reg = dev->dev_pr_res_holder;
1059 if (!pr_reg) {
1060 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1061 spin_unlock(&dev->dev_reservation_lock);
1062 return *len;
1063 }
1064 se_nacl = pr_reg->pr_reg_nacl;
1065 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1066 PR_REG_ISID_ID_LEN);
1067
1068 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1069 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1070 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1071 spin_unlock(&dev->dev_reservation_lock);
1072
1073 return *len;
1074 }
1075
1076 static ssize_t target_core_dev_pr_show_spc2_res(
1077 struct se_device *dev,
1078 char *page,
1079 ssize_t *len)
1080 {
1081 struct se_node_acl *se_nacl;
1082
1083 spin_lock(&dev->dev_reservation_lock);
1084 se_nacl = dev->dev_reserved_node_acl;
1085 if (!se_nacl) {
1086 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1087 spin_unlock(&dev->dev_reservation_lock);
1088 return *len;
1089 }
1090 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1091 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1092 se_nacl->initiatorname);
1093 spin_unlock(&dev->dev_reservation_lock);
1094
1095 return *len;
1096 }
1097
1098 static ssize_t target_core_dev_pr_show_attr_res_holder(
1099 struct se_subsystem_dev *su_dev,
1100 char *page)
1101 {
1102 ssize_t len = 0;
1103
1104 if (!su_dev->se_dev_ptr)
1105 return -ENODEV;
1106
1107 switch (su_dev->t10_pr.res_type) {
1108 case SPC3_PERSISTENT_RESERVATIONS:
1109 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1110 page, &len);
1111 break;
1112 case SPC2_RESERVATIONS:
1113 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1114 page, &len);
1115 break;
1116 case SPC_PASSTHROUGH:
1117 len += sprintf(page+len, "Passthrough\n");
1118 break;
1119 default:
1120 len += sprintf(page+len, "Unknown\n");
1121 break;
1122 }
1123
1124 return len;
1125 }
1126
1127 SE_DEV_PR_ATTR_RO(res_holder);
1128
1129 /*
1130 * res_pr_all_tgt_pts
1131 */
1132 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1133 struct se_subsystem_dev *su_dev,
1134 char *page)
1135 {
1136 struct se_device *dev;
1137 struct t10_pr_registration *pr_reg;
1138 ssize_t len = 0;
1139
1140 dev = su_dev->se_dev_ptr;
1141 if (!dev)
1142 return -ENODEV;
1143
1144 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1145 return len;
1146
1147 spin_lock(&dev->dev_reservation_lock);
1148 pr_reg = dev->dev_pr_res_holder;
1149 if (!pr_reg) {
1150 len = sprintf(page, "No SPC-3 Reservation holder\n");
1151 spin_unlock(&dev->dev_reservation_lock);
1152 return len;
1153 }
1154 /*
1155 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1156 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1157 */
1158 if (pr_reg->pr_reg_all_tg_pt)
1159 len = sprintf(page, "SPC-3 Reservation: All Target"
1160 " Ports registration\n");
1161 else
1162 len = sprintf(page, "SPC-3 Reservation: Single"
1163 " Target Port registration\n");
1164 spin_unlock(&dev->dev_reservation_lock);
1165
1166 return len;
1167 }
1168
1169 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1170
1171 /*
1172 * res_pr_generation
1173 */
1174 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1175 struct se_subsystem_dev *su_dev,
1176 char *page)
1177 {
1178 if (!su_dev->se_dev_ptr)
1179 return -ENODEV;
1180
1181 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1182 return 0;
1183
1184 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1185 }
1186
1187 SE_DEV_PR_ATTR_RO(res_pr_generation);
1188
1189 /*
1190 * res_pr_holder_tg_port
1191 */
1192 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1193 struct se_subsystem_dev *su_dev,
1194 char *page)
1195 {
1196 struct se_device *dev;
1197 struct se_node_acl *se_nacl;
1198 struct se_lun *lun;
1199 struct se_portal_group *se_tpg;
1200 struct t10_pr_registration *pr_reg;
1201 struct target_core_fabric_ops *tfo;
1202 ssize_t len = 0;
1203
1204 dev = su_dev->se_dev_ptr;
1205 if (!dev)
1206 return -ENODEV;
1207
1208 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1209 return len;
1210
1211 spin_lock(&dev->dev_reservation_lock);
1212 pr_reg = dev->dev_pr_res_holder;
1213 if (!pr_reg) {
1214 len = sprintf(page, "No SPC-3 Reservation holder\n");
1215 spin_unlock(&dev->dev_reservation_lock);
1216 return len;
1217 }
1218 se_nacl = pr_reg->pr_reg_nacl;
1219 se_tpg = se_nacl->se_tpg;
1220 lun = pr_reg->pr_reg_tg_pt_lun;
1221 tfo = se_tpg->se_tpg_tfo;
1222
1223 len += sprintf(page+len, "SPC-3 Reservation: %s"
1224 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1225 tfo->tpg_get_wwn(se_tpg));
1226 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1227 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1228 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1229 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1230 tfo->get_fabric_name(), lun->unpacked_lun);
1231 spin_unlock(&dev->dev_reservation_lock);
1232
1233 return len;
1234 }
1235
1236 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1237
1238 /*
1239 * res_pr_registered_i_pts
1240 */
1241 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1242 struct se_subsystem_dev *su_dev,
1243 char *page)
1244 {
1245 struct target_core_fabric_ops *tfo;
1246 struct t10_pr_registration *pr_reg;
1247 unsigned char buf[384];
1248 char i_buf[PR_REG_ISID_ID_LEN];
1249 ssize_t len = 0;
1250 int reg_count = 0, prf_isid;
1251
1252 if (!su_dev->se_dev_ptr)
1253 return -ENODEV;
1254
1255 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1256 return len;
1257
1258 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1259
1260 spin_lock(&su_dev->t10_pr.registration_lock);
1261 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1262 pr_reg_list) {
1263
1264 memset(buf, 0, 384);
1265 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1266 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1267 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1268 PR_REG_ISID_ID_LEN);
1269 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1270 tfo->get_fabric_name(),
1271 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1272 &i_buf[0] : "", pr_reg->pr_res_key,
1273 pr_reg->pr_res_generation);
1274
1275 if (len + strlen(buf) >= PAGE_SIZE)
1276 break;
1277
1278 len += sprintf(page+len, "%s", buf);
1279 reg_count++;
1280 }
1281 spin_unlock(&su_dev->t10_pr.registration_lock);
1282
1283 if (!reg_count)
1284 len += sprintf(page+len, "None\n");
1285
1286 return len;
1287 }
1288
1289 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1290
1291 /*
1292 * res_pr_type
1293 */
1294 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1295 struct se_subsystem_dev *su_dev,
1296 char *page)
1297 {
1298 struct se_device *dev;
1299 struct t10_pr_registration *pr_reg;
1300 ssize_t len = 0;
1301
1302 dev = su_dev->se_dev_ptr;
1303 if (!dev)
1304 return -ENODEV;
1305
1306 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1307 return len;
1308
1309 spin_lock(&dev->dev_reservation_lock);
1310 pr_reg = dev->dev_pr_res_holder;
1311 if (!pr_reg) {
1312 len = sprintf(page, "No SPC-3 Reservation holder\n");
1313 spin_unlock(&dev->dev_reservation_lock);
1314 return len;
1315 }
1316 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1317 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1318 spin_unlock(&dev->dev_reservation_lock);
1319
1320 return len;
1321 }
1322
1323 SE_DEV_PR_ATTR_RO(res_pr_type);
1324
1325 /*
1326 * res_type
1327 */
1328 static ssize_t target_core_dev_pr_show_attr_res_type(
1329 struct se_subsystem_dev *su_dev,
1330 char *page)
1331 {
1332 ssize_t len = 0;
1333
1334 if (!su_dev->se_dev_ptr)
1335 return -ENODEV;
1336
1337 switch (su_dev->t10_pr.res_type) {
1338 case SPC3_PERSISTENT_RESERVATIONS:
1339 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1340 break;
1341 case SPC2_RESERVATIONS:
1342 len = sprintf(page, "SPC2_RESERVATIONS\n");
1343 break;
1344 case SPC_PASSTHROUGH:
1345 len = sprintf(page, "SPC_PASSTHROUGH\n");
1346 break;
1347 default:
1348 len = sprintf(page, "UNKNOWN\n");
1349 break;
1350 }
1351
1352 return len;
1353 }
1354
1355 SE_DEV_PR_ATTR_RO(res_type);
1356
1357 /*
1358 * res_aptpl_active
1359 */
1360
1361 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1362 struct se_subsystem_dev *su_dev,
1363 char *page)
1364 {
1365 if (!su_dev->se_dev_ptr)
1366 return -ENODEV;
1367
1368 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1369 return 0;
1370
1371 return sprintf(page, "APTPL Bit Status: %s\n",
1372 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1373 }
1374
1375 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1376
1377 /*
1378 * res_aptpl_metadata
1379 */
1380 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1381 struct se_subsystem_dev *su_dev,
1382 char *page)
1383 {
1384 if (!su_dev->se_dev_ptr)
1385 return -ENODEV;
1386
1387 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1388 return 0;
1389
1390 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1391 }
1392
1393 enum {
1394 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1395 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1396 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1397 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1398 };
1399
1400 static match_table_t tokens = {
1401 {Opt_initiator_fabric, "initiator_fabric=%s"},
1402 {Opt_initiator_node, "initiator_node=%s"},
1403 {Opt_initiator_sid, "initiator_sid=%s"},
1404 {Opt_sa_res_key, "sa_res_key=%s"},
1405 {Opt_res_holder, "res_holder=%d"},
1406 {Opt_res_type, "res_type=%d"},
1407 {Opt_res_scope, "res_scope=%d"},
1408 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1409 {Opt_mapped_lun, "mapped_lun=%d"},
1410 {Opt_target_fabric, "target_fabric=%s"},
1411 {Opt_target_node, "target_node=%s"},
1412 {Opt_tpgt, "tpgt=%d"},
1413 {Opt_port_rtpi, "port_rtpi=%d"},
1414 {Opt_target_lun, "target_lun=%d"},
1415 {Opt_err, NULL}
1416 };
1417
1418 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1419 struct se_subsystem_dev *su_dev,
1420 const char *page,
1421 size_t count)
1422 {
1423 struct se_device *dev;
1424 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1425 unsigned char *t_fabric = NULL, *t_port = NULL;
1426 char *orig, *ptr, *arg_p, *opts;
1427 substring_t args[MAX_OPT_ARGS];
1428 unsigned long long tmp_ll;
1429 u64 sa_res_key = 0;
1430 u32 mapped_lun = 0, target_lun = 0;
1431 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1432 u16 port_rpti = 0, tpgt = 0;
1433 u8 type = 0, scope;
1434
1435 dev = su_dev->se_dev_ptr;
1436 if (!dev)
1437 return -ENODEV;
1438
1439 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1440 return 0;
1441
1442 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1443 pr_debug("Unable to process APTPL metadata while"
1444 " active fabric exports exist\n");
1445 return -EINVAL;
1446 }
1447
1448 opts = kstrdup(page, GFP_KERNEL);
1449 if (!opts)
1450 return -ENOMEM;
1451
1452 orig = opts;
1453 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1454 if (!*ptr)
1455 continue;
1456
1457 token = match_token(ptr, tokens, args);
1458 switch (token) {
1459 case Opt_initiator_fabric:
1460 i_fabric = match_strdup(&args[0]);
1461 if (!i_fabric) {
1462 ret = -ENOMEM;
1463 goto out;
1464 }
1465 break;
1466 case Opt_initiator_node:
1467 i_port = match_strdup(&args[0]);
1468 if (!i_port) {
1469 ret = -ENOMEM;
1470 goto out;
1471 }
1472 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1473 pr_err("APTPL metadata initiator_node="
1474 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1475 PR_APTPL_MAX_IPORT_LEN);
1476 ret = -EINVAL;
1477 break;
1478 }
1479 break;
1480 case Opt_initiator_sid:
1481 isid = match_strdup(&args[0]);
1482 if (!isid) {
1483 ret = -ENOMEM;
1484 goto out;
1485 }
1486 if (strlen(isid) >= PR_REG_ISID_LEN) {
1487 pr_err("APTPL metadata initiator_isid"
1488 "= exceeds PR_REG_ISID_LEN: %d\n",
1489 PR_REG_ISID_LEN);
1490 ret = -EINVAL;
1491 break;
1492 }
1493 break;
1494 case Opt_sa_res_key:
1495 arg_p = match_strdup(&args[0]);
1496 if (!arg_p) {
1497 ret = -ENOMEM;
1498 goto out;
1499 }
1500 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1501 if (ret < 0) {
1502 pr_err("strict_strtoull() failed for"
1503 " sa_res_key=\n");
1504 goto out;
1505 }
1506 sa_res_key = (u64)tmp_ll;
1507 break;
1508 /*
1509 * PR APTPL Metadata for Reservation
1510 */
1511 case Opt_res_holder:
1512 match_int(args, &arg);
1513 res_holder = arg;
1514 break;
1515 case Opt_res_type:
1516 match_int(args, &arg);
1517 type = (u8)arg;
1518 break;
1519 case Opt_res_scope:
1520 match_int(args, &arg);
1521 scope = (u8)arg;
1522 break;
1523 case Opt_res_all_tg_pt:
1524 match_int(args, &arg);
1525 all_tg_pt = (int)arg;
1526 break;
1527 case Opt_mapped_lun:
1528 match_int(args, &arg);
1529 mapped_lun = (u32)arg;
1530 break;
1531 /*
1532 * PR APTPL Metadata for Target Port
1533 */
1534 case Opt_target_fabric:
1535 t_fabric = match_strdup(&args[0]);
1536 if (!t_fabric) {
1537 ret = -ENOMEM;
1538 goto out;
1539 }
1540 break;
1541 case Opt_target_node:
1542 t_port = match_strdup(&args[0]);
1543 if (!t_port) {
1544 ret = -ENOMEM;
1545 goto out;
1546 }
1547 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1548 pr_err("APTPL metadata target_node="
1549 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1550 PR_APTPL_MAX_TPORT_LEN);
1551 ret = -EINVAL;
1552 break;
1553 }
1554 break;
1555 case Opt_tpgt:
1556 match_int(args, &arg);
1557 tpgt = (u16)arg;
1558 break;
1559 case Opt_port_rtpi:
1560 match_int(args, &arg);
1561 port_rpti = (u16)arg;
1562 break;
1563 case Opt_target_lun:
1564 match_int(args, &arg);
1565 target_lun = (u32)arg;
1566 break;
1567 default:
1568 break;
1569 }
1570 }
1571
1572 if (!i_port || !t_port || !sa_res_key) {
1573 pr_err("Illegal parameters for APTPL registration\n");
1574 ret = -EINVAL;
1575 goto out;
1576 }
1577
1578 if (res_holder && !(type)) {
1579 pr_err("Illegal PR type: 0x%02x for reservation"
1580 " holder\n", type);
1581 ret = -EINVAL;
1582 goto out;
1583 }
1584
1585 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1586 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1587 res_holder, all_tg_pt, type);
1588 out:
1589 kfree(i_fabric);
1590 kfree(i_port);
1591 kfree(isid);
1592 kfree(t_fabric);
1593 kfree(t_port);
1594 kfree(orig);
1595 return (ret == 0) ? count : ret;
1596 }
1597
1598 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1599
1600 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1601
1602 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1603 &target_core_dev_pr_res_holder.attr,
1604 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1605 &target_core_dev_pr_res_pr_generation.attr,
1606 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1607 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1608 &target_core_dev_pr_res_pr_type.attr,
1609 &target_core_dev_pr_res_type.attr,
1610 &target_core_dev_pr_res_aptpl_active.attr,
1611 &target_core_dev_pr_res_aptpl_metadata.attr,
1612 NULL,
1613 };
1614
1615 static struct configfs_item_operations target_core_dev_pr_ops = {
1616 .show_attribute = target_core_dev_pr_attr_show,
1617 .store_attribute = target_core_dev_pr_attr_store,
1618 };
1619
1620 static struct config_item_type target_core_dev_pr_cit = {
1621 .ct_item_ops = &target_core_dev_pr_ops,
1622 .ct_attrs = target_core_dev_pr_attrs,
1623 .ct_owner = THIS_MODULE,
1624 };
1625
1626 /* End functions for struct config_item_type target_core_dev_pr_cit */
1627
1628 /* Start functions for struct config_item_type target_core_dev_cit */
1629
1630 static ssize_t target_core_show_dev_info(void *p, char *page)
1631 {
1632 struct se_subsystem_dev *se_dev = p;
1633 struct se_hba *hba = se_dev->se_dev_hba;
1634 struct se_subsystem_api *t = hba->transport;
1635 int bl = 0;
1636 ssize_t read_bytes = 0;
1637
1638 if (!se_dev->se_dev_ptr)
1639 return -ENODEV;
1640
1641 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1642 read_bytes += bl;
1643 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1644 return read_bytes;
1645 }
1646
1647 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1648 .attr = { .ca_owner = THIS_MODULE,
1649 .ca_name = "info",
1650 .ca_mode = S_IRUGO },
1651 .show = target_core_show_dev_info,
1652 .store = NULL,
1653 };
1654
1655 static ssize_t target_core_store_dev_control(
1656 void *p,
1657 const char *page,
1658 size_t count)
1659 {
1660 struct se_subsystem_dev *se_dev = p;
1661 struct se_hba *hba = se_dev->se_dev_hba;
1662 struct se_subsystem_api *t = hba->transport;
1663
1664 if (!se_dev->se_dev_su_ptr) {
1665 pr_err("Unable to locate struct se_subsystem_dev>se"
1666 "_dev_su_ptr\n");
1667 return -EINVAL;
1668 }
1669
1670 return t->set_configfs_dev_params(hba, se_dev, page, count);
1671 }
1672
1673 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1674 .attr = { .ca_owner = THIS_MODULE,
1675 .ca_name = "control",
1676 .ca_mode = S_IWUSR },
1677 .show = NULL,
1678 .store = target_core_store_dev_control,
1679 };
1680
1681 static ssize_t target_core_show_dev_alias(void *p, char *page)
1682 {
1683 struct se_subsystem_dev *se_dev = p;
1684
1685 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1686 return 0;
1687
1688 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1689 }
1690
1691 static ssize_t target_core_store_dev_alias(
1692 void *p,
1693 const char *page,
1694 size_t count)
1695 {
1696 struct se_subsystem_dev *se_dev = p;
1697 struct se_hba *hba = se_dev->se_dev_hba;
1698 ssize_t read_bytes;
1699
1700 if (count > (SE_DEV_ALIAS_LEN-1)) {
1701 pr_err("alias count: %d exceeds"
1702 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1703 SE_DEV_ALIAS_LEN-1);
1704 return -EINVAL;
1705 }
1706
1707 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1708 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1709 "%s", page);
1710
1711 if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
1712 se_dev->se_dev_alias[read_bytes - 1] = '\0';
1713
1714 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1715 config_item_name(&hba->hba_group.cg_item),
1716 config_item_name(&se_dev->se_dev_group.cg_item),
1717 se_dev->se_dev_alias);
1718
1719 return read_bytes;
1720 }
1721
1722 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1723 .attr = { .ca_owner = THIS_MODULE,
1724 .ca_name = "alias",
1725 .ca_mode = S_IRUGO | S_IWUSR },
1726 .show = target_core_show_dev_alias,
1727 .store = target_core_store_dev_alias,
1728 };
1729
1730 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1731 {
1732 struct se_subsystem_dev *se_dev = p;
1733
1734 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1735 return 0;
1736
1737 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1738 }
1739
1740 static ssize_t target_core_store_dev_udev_path(
1741 void *p,
1742 const char *page,
1743 size_t count)
1744 {
1745 struct se_subsystem_dev *se_dev = p;
1746 struct se_hba *hba = se_dev->se_dev_hba;
1747 ssize_t read_bytes;
1748
1749 if (count > (SE_UDEV_PATH_LEN-1)) {
1750 pr_err("udev_path count: %d exceeds"
1751 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1752 SE_UDEV_PATH_LEN-1);
1753 return -EINVAL;
1754 }
1755
1756 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1757 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1758 "%s", page);
1759
1760 if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
1761 se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
1762
1763 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1764 config_item_name(&hba->hba_group.cg_item),
1765 config_item_name(&se_dev->se_dev_group.cg_item),
1766 se_dev->se_dev_udev_path);
1767
1768 return read_bytes;
1769 }
1770
1771 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1772 .attr = { .ca_owner = THIS_MODULE,
1773 .ca_name = "udev_path",
1774 .ca_mode = S_IRUGO | S_IWUSR },
1775 .show = target_core_show_dev_udev_path,
1776 .store = target_core_store_dev_udev_path,
1777 };
1778
1779 static ssize_t target_core_store_dev_enable(
1780 void *p,
1781 const char *page,
1782 size_t count)
1783 {
1784 struct se_subsystem_dev *se_dev = p;
1785 struct se_device *dev;
1786 struct se_hba *hba = se_dev->se_dev_hba;
1787 struct se_subsystem_api *t = hba->transport;
1788 char *ptr;
1789
1790 ptr = strstr(page, "1");
1791 if (!ptr) {
1792 pr_err("For dev_enable ops, only valid value"
1793 " is \"1\"\n");
1794 return -EINVAL;
1795 }
1796 if (se_dev->se_dev_ptr) {
1797 pr_err("se_dev->se_dev_ptr already set for storage"
1798 " object\n");
1799 return -EEXIST;
1800 }
1801
1802 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1803 return -EINVAL;
1804
1805 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1806 if (IS_ERR(dev))
1807 return PTR_ERR(dev);
1808 else if (!dev)
1809 return -EINVAL;
1810
1811 se_dev->se_dev_ptr = dev;
1812 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1813 " %p\n", se_dev->se_dev_ptr);
1814
1815 return count;
1816 }
1817
1818 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1819 .attr = { .ca_owner = THIS_MODULE,
1820 .ca_name = "enable",
1821 .ca_mode = S_IWUSR },
1822 .show = NULL,
1823 .store = target_core_store_dev_enable,
1824 };
1825
1826 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1827 {
1828 struct se_device *dev;
1829 struct se_subsystem_dev *su_dev = p;
1830 struct config_item *lu_ci;
1831 struct t10_alua_lu_gp *lu_gp;
1832 struct t10_alua_lu_gp_member *lu_gp_mem;
1833 ssize_t len = 0;
1834
1835 dev = su_dev->se_dev_ptr;
1836 if (!dev)
1837 return -ENODEV;
1838
1839 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1840 return len;
1841
1842 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1843 if (!lu_gp_mem) {
1844 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1845 " pointer\n");
1846 return -EINVAL;
1847 }
1848
1849 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1850 lu_gp = lu_gp_mem->lu_gp;
1851 if (lu_gp) {
1852 lu_ci = &lu_gp->lu_gp_group.cg_item;
1853 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1854 config_item_name(lu_ci), lu_gp->lu_gp_id);
1855 }
1856 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1857
1858 return len;
1859 }
1860
1861 static ssize_t target_core_store_alua_lu_gp(
1862 void *p,
1863 const char *page,
1864 size_t count)
1865 {
1866 struct se_device *dev;
1867 struct se_subsystem_dev *su_dev = p;
1868 struct se_hba *hba = su_dev->se_dev_hba;
1869 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1870 struct t10_alua_lu_gp_member *lu_gp_mem;
1871 unsigned char buf[LU_GROUP_NAME_BUF];
1872 int move = 0;
1873
1874 dev = su_dev->se_dev_ptr;
1875 if (!dev)
1876 return -ENODEV;
1877
1878 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1879 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1880 config_item_name(&hba->hba_group.cg_item),
1881 config_item_name(&su_dev->se_dev_group.cg_item));
1882 return -EINVAL;
1883 }
1884 if (count > LU_GROUP_NAME_BUF) {
1885 pr_err("ALUA LU Group Alias too large!\n");
1886 return -EINVAL;
1887 }
1888 memset(buf, 0, LU_GROUP_NAME_BUF);
1889 memcpy(buf, page, count);
1890 /*
1891 * Any ALUA logical unit alias besides "NULL" means we will be
1892 * making a new group association.
1893 */
1894 if (strcmp(strstrip(buf), "NULL")) {
1895 /*
1896 * core_alua_get_lu_gp_by_name() will increment reference to
1897 * struct t10_alua_lu_gp. This reference is released with
1898 * core_alua_get_lu_gp_by_name below().
1899 */
1900 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1901 if (!lu_gp_new)
1902 return -ENODEV;
1903 }
1904 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1905 if (!lu_gp_mem) {
1906 if (lu_gp_new)
1907 core_alua_put_lu_gp_from_name(lu_gp_new);
1908 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1909 " pointer\n");
1910 return -EINVAL;
1911 }
1912
1913 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1914 lu_gp = lu_gp_mem->lu_gp;
1915 if (lu_gp) {
1916 /*
1917 * Clearing an existing lu_gp association, and replacing
1918 * with NULL
1919 */
1920 if (!lu_gp_new) {
1921 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1922 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1923 " %hu\n",
1924 config_item_name(&hba->hba_group.cg_item),
1925 config_item_name(&su_dev->se_dev_group.cg_item),
1926 config_item_name(&lu_gp->lu_gp_group.cg_item),
1927 lu_gp->lu_gp_id);
1928
1929 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1930 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1931
1932 return count;
1933 }
1934 /*
1935 * Removing existing association of lu_gp_mem with lu_gp
1936 */
1937 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1938 move = 1;
1939 }
1940 /*
1941 * Associate lu_gp_mem with lu_gp_new.
1942 */
1943 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1944 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1945
1946 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1947 " core/alua/lu_gps/%s, ID: %hu\n",
1948 (move) ? "Moving" : "Adding",
1949 config_item_name(&hba->hba_group.cg_item),
1950 config_item_name(&su_dev->se_dev_group.cg_item),
1951 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1952 lu_gp_new->lu_gp_id);
1953
1954 core_alua_put_lu_gp_from_name(lu_gp_new);
1955 return count;
1956 }
1957
1958 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1959 .attr = { .ca_owner = THIS_MODULE,
1960 .ca_name = "alua_lu_gp",
1961 .ca_mode = S_IRUGO | S_IWUSR },
1962 .show = target_core_show_alua_lu_gp,
1963 .store = target_core_store_alua_lu_gp,
1964 };
1965
1966 static struct configfs_attribute *lio_core_dev_attrs[] = {
1967 &target_core_attr_dev_info.attr,
1968 &target_core_attr_dev_control.attr,
1969 &target_core_attr_dev_alias.attr,
1970 &target_core_attr_dev_udev_path.attr,
1971 &target_core_attr_dev_enable.attr,
1972 &target_core_attr_dev_alua_lu_gp.attr,
1973 NULL,
1974 };
1975
1976 static void target_core_dev_release(struct config_item *item)
1977 {
1978 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1979 struct se_subsystem_dev, se_dev_group);
1980 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1981 struct se_subsystem_api *t = hba->transport;
1982 struct config_group *dev_cg = &se_dev->se_dev_group;
1983
1984 kfree(dev_cg->default_groups);
1985 /*
1986 * This pointer will set when the storage is enabled with:
1987 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1988 */
1989 if (se_dev->se_dev_ptr) {
1990 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1991 "virtual_device() for se_dev_ptr: %p\n",
1992 se_dev->se_dev_ptr);
1993
1994 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1995 } else {
1996 /*
1997 * Release struct se_subsystem_dev->se_dev_su_ptr..
1998 */
1999 pr_debug("Target_Core_ConfigFS: Calling t->free_"
2000 "device() for se_dev_su_ptr: %p\n",
2001 se_dev->se_dev_su_ptr);
2002
2003 t->free_device(se_dev->se_dev_su_ptr);
2004 }
2005
2006 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2007 "_dev_t: %p\n", se_dev);
2008 kfree(se_dev);
2009 }
2010
2011 static ssize_t target_core_dev_show(struct config_item *item,
2012 struct configfs_attribute *attr,
2013 char *page)
2014 {
2015 struct se_subsystem_dev *se_dev = container_of(
2016 to_config_group(item), struct se_subsystem_dev,
2017 se_dev_group);
2018 struct target_core_configfs_attribute *tc_attr = container_of(
2019 attr, struct target_core_configfs_attribute, attr);
2020
2021 if (!tc_attr->show)
2022 return -EINVAL;
2023
2024 return tc_attr->show(se_dev, page);
2025 }
2026
2027 static ssize_t target_core_dev_store(struct config_item *item,
2028 struct configfs_attribute *attr,
2029 const char *page, size_t count)
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->store)
2038 return -EINVAL;
2039
2040 return tc_attr->store(se_dev, page, count);
2041 }
2042
2043 static struct configfs_item_operations target_core_dev_item_ops = {
2044 .release = target_core_dev_release,
2045 .show_attribute = target_core_dev_show,
2046 .store_attribute = target_core_dev_store,
2047 };
2048
2049 static struct config_item_type target_core_dev_cit = {
2050 .ct_item_ops = &target_core_dev_item_ops,
2051 .ct_attrs = lio_core_dev_attrs,
2052 .ct_owner = THIS_MODULE,
2053 };
2054
2055 /* End functions for struct config_item_type target_core_dev_cit */
2056
2057 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2058
2059 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2060 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2061 static struct target_core_alua_lu_gp_attribute \
2062 target_core_alua_lu_gp_##_name = \
2063 __CONFIGFS_EATTR(_name, _mode, \
2064 target_core_alua_lu_gp_show_attr_##_name, \
2065 target_core_alua_lu_gp_store_attr_##_name);
2066
2067 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2068 static struct target_core_alua_lu_gp_attribute \
2069 target_core_alua_lu_gp_##_name = \
2070 __CONFIGFS_EATTR_RO(_name, \
2071 target_core_alua_lu_gp_show_attr_##_name);
2072
2073 /*
2074 * lu_gp_id
2075 */
2076 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2077 struct t10_alua_lu_gp *lu_gp,
2078 char *page)
2079 {
2080 if (!lu_gp->lu_gp_valid_id)
2081 return 0;
2082
2083 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2084 }
2085
2086 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2087 struct t10_alua_lu_gp *lu_gp,
2088 const char *page,
2089 size_t count)
2090 {
2091 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2092 unsigned long lu_gp_id;
2093 int ret;
2094
2095 ret = strict_strtoul(page, 0, &lu_gp_id);
2096 if (ret < 0) {
2097 pr_err("strict_strtoul() returned %d for"
2098 " lu_gp_id\n", ret);
2099 return -EINVAL;
2100 }
2101 if (lu_gp_id > 0x0000ffff) {
2102 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2103 " 0x0000ffff\n", lu_gp_id);
2104 return -EINVAL;
2105 }
2106
2107 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2108 if (ret < 0)
2109 return -EINVAL;
2110
2111 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2112 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2113 config_item_name(&alua_lu_gp_cg->cg_item),
2114 lu_gp->lu_gp_id);
2115
2116 return count;
2117 }
2118
2119 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2120
2121 /*
2122 * members
2123 */
2124 static ssize_t target_core_alua_lu_gp_show_attr_members(
2125 struct t10_alua_lu_gp *lu_gp,
2126 char *page)
2127 {
2128 struct se_device *dev;
2129 struct se_hba *hba;
2130 struct se_subsystem_dev *su_dev;
2131 struct t10_alua_lu_gp_member *lu_gp_mem;
2132 ssize_t len = 0, cur_len;
2133 unsigned char buf[LU_GROUP_NAME_BUF];
2134
2135 memset(buf, 0, LU_GROUP_NAME_BUF);
2136
2137 spin_lock(&lu_gp->lu_gp_lock);
2138 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2139 dev = lu_gp_mem->lu_gp_mem_dev;
2140 su_dev = dev->se_sub_dev;
2141 hba = su_dev->se_dev_hba;
2142
2143 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2144 config_item_name(&hba->hba_group.cg_item),
2145 config_item_name(&su_dev->se_dev_group.cg_item));
2146 cur_len++; /* Extra byte for NULL terminator */
2147
2148 if ((cur_len + len) > PAGE_SIZE) {
2149 pr_warn("Ran out of lu_gp_show_attr"
2150 "_members buffer\n");
2151 break;
2152 }
2153 memcpy(page+len, buf, cur_len);
2154 len += cur_len;
2155 }
2156 spin_unlock(&lu_gp->lu_gp_lock);
2157
2158 return len;
2159 }
2160
2161 SE_DEV_ALUA_LU_ATTR_RO(members);
2162
2163 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2164
2165 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2166 &target_core_alua_lu_gp_lu_gp_id.attr,
2167 &target_core_alua_lu_gp_members.attr,
2168 NULL,
2169 };
2170
2171 static void target_core_alua_lu_gp_release(struct config_item *item)
2172 {
2173 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2174 struct t10_alua_lu_gp, lu_gp_group);
2175
2176 core_alua_free_lu_gp(lu_gp);
2177 }
2178
2179 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2180 .release = target_core_alua_lu_gp_release,
2181 .show_attribute = target_core_alua_lu_gp_attr_show,
2182 .store_attribute = target_core_alua_lu_gp_attr_store,
2183 };
2184
2185 static struct config_item_type target_core_alua_lu_gp_cit = {
2186 .ct_item_ops = &target_core_alua_lu_gp_ops,
2187 .ct_attrs = target_core_alua_lu_gp_attrs,
2188 .ct_owner = THIS_MODULE,
2189 };
2190
2191 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2192
2193 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2194
2195 static struct config_group *target_core_alua_create_lu_gp(
2196 struct config_group *group,
2197 const char *name)
2198 {
2199 struct t10_alua_lu_gp *lu_gp;
2200 struct config_group *alua_lu_gp_cg = NULL;
2201 struct config_item *alua_lu_gp_ci = NULL;
2202
2203 lu_gp = core_alua_allocate_lu_gp(name, 0);
2204 if (IS_ERR(lu_gp))
2205 return NULL;
2206
2207 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2208 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2209
2210 config_group_init_type_name(alua_lu_gp_cg, name,
2211 &target_core_alua_lu_gp_cit);
2212
2213 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2214 " Group: core/alua/lu_gps/%s\n",
2215 config_item_name(alua_lu_gp_ci));
2216
2217 return alua_lu_gp_cg;
2218
2219 }
2220
2221 static void target_core_alua_drop_lu_gp(
2222 struct config_group *group,
2223 struct config_item *item)
2224 {
2225 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2226 struct t10_alua_lu_gp, lu_gp_group);
2227
2228 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2229 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2230 config_item_name(item), lu_gp->lu_gp_id);
2231 /*
2232 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2233 * -> target_core_alua_lu_gp_release()
2234 */
2235 config_item_put(item);
2236 }
2237
2238 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2239 .make_group = &target_core_alua_create_lu_gp,
2240 .drop_item = &target_core_alua_drop_lu_gp,
2241 };
2242
2243 static struct config_item_type target_core_alua_lu_gps_cit = {
2244 .ct_item_ops = NULL,
2245 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2246 .ct_owner = THIS_MODULE,
2247 };
2248
2249 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2250
2251 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2252
2253 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2254 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2255 static struct target_core_alua_tg_pt_gp_attribute \
2256 target_core_alua_tg_pt_gp_##_name = \
2257 __CONFIGFS_EATTR(_name, _mode, \
2258 target_core_alua_tg_pt_gp_show_attr_##_name, \
2259 target_core_alua_tg_pt_gp_store_attr_##_name);
2260
2261 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2262 static struct target_core_alua_tg_pt_gp_attribute \
2263 target_core_alua_tg_pt_gp_##_name = \
2264 __CONFIGFS_EATTR_RO(_name, \
2265 target_core_alua_tg_pt_gp_show_attr_##_name);
2266
2267 /*
2268 * alua_access_state
2269 */
2270 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2271 struct t10_alua_tg_pt_gp *tg_pt_gp,
2272 char *page)
2273 {
2274 return sprintf(page, "%d\n",
2275 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2276 }
2277
2278 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2279 struct t10_alua_tg_pt_gp *tg_pt_gp,
2280 const char *page,
2281 size_t count)
2282 {
2283 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2284 unsigned long tmp;
2285 int new_state, ret;
2286
2287 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2288 pr_err("Unable to do implict ALUA on non valid"
2289 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2290 return -EINVAL;
2291 }
2292
2293 ret = strict_strtoul(page, 0, &tmp);
2294 if (ret < 0) {
2295 pr_err("Unable to extract new ALUA access state from"
2296 " %s\n", page);
2297 return -EINVAL;
2298 }
2299 new_state = (int)tmp;
2300
2301 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2302 pr_err("Unable to process implict configfs ALUA"
2303 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2304 return -EINVAL;
2305 }
2306
2307 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2308 NULL, NULL, new_state, 0);
2309 return (!ret) ? count : -EINVAL;
2310 }
2311
2312 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2313
2314 /*
2315 * alua_access_status
2316 */
2317 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2318 struct t10_alua_tg_pt_gp *tg_pt_gp,
2319 char *page)
2320 {
2321 return sprintf(page, "%s\n",
2322 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2323 }
2324
2325 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2326 struct t10_alua_tg_pt_gp *tg_pt_gp,
2327 const char *page,
2328 size_t count)
2329 {
2330 unsigned long tmp;
2331 int new_status, ret;
2332
2333 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2334 pr_err("Unable to do set ALUA access status on non"
2335 " valid tg_pt_gp ID: %hu\n",
2336 tg_pt_gp->tg_pt_gp_valid_id);
2337 return -EINVAL;
2338 }
2339
2340 ret = strict_strtoul(page, 0, &tmp);
2341 if (ret < 0) {
2342 pr_err("Unable to extract new ALUA access status"
2343 " from %s\n", page);
2344 return -EINVAL;
2345 }
2346 new_status = (int)tmp;
2347
2348 if ((new_status != ALUA_STATUS_NONE) &&
2349 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2350 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2351 pr_err("Illegal ALUA access status: 0x%02x\n",
2352 new_status);
2353 return -EINVAL;
2354 }
2355
2356 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2357 return count;
2358 }
2359
2360 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2361
2362 /*
2363 * alua_access_type
2364 */
2365 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2366 struct t10_alua_tg_pt_gp *tg_pt_gp,
2367 char *page)
2368 {
2369 return core_alua_show_access_type(tg_pt_gp, page);
2370 }
2371
2372 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2373 struct t10_alua_tg_pt_gp *tg_pt_gp,
2374 const char *page,
2375 size_t count)
2376 {
2377 return core_alua_store_access_type(tg_pt_gp, page, count);
2378 }
2379
2380 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2381
2382 /*
2383 * alua_write_metadata
2384 */
2385 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2386 struct t10_alua_tg_pt_gp *tg_pt_gp,
2387 char *page)
2388 {
2389 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2390 }
2391
2392 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2393 struct t10_alua_tg_pt_gp *tg_pt_gp,
2394 const char *page,
2395 size_t count)
2396 {
2397 unsigned long tmp;
2398 int ret;
2399
2400 ret = strict_strtoul(page, 0, &tmp);
2401 if (ret < 0) {
2402 pr_err("Unable to extract alua_write_metadata\n");
2403 return -EINVAL;
2404 }
2405
2406 if ((tmp != 0) && (tmp != 1)) {
2407 pr_err("Illegal value for alua_write_metadata:"
2408 " %lu\n", tmp);
2409 return -EINVAL;
2410 }
2411 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2412
2413 return count;
2414 }
2415
2416 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2417
2418
2419
2420 /*
2421 * nonop_delay_msecs
2422 */
2423 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2424 struct t10_alua_tg_pt_gp *tg_pt_gp,
2425 char *page)
2426 {
2427 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2428
2429 }
2430
2431 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2432 struct t10_alua_tg_pt_gp *tg_pt_gp,
2433 const char *page,
2434 size_t count)
2435 {
2436 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2437 }
2438
2439 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2440
2441 /*
2442 * trans_delay_msecs
2443 */
2444 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2445 struct t10_alua_tg_pt_gp *tg_pt_gp,
2446 char *page)
2447 {
2448 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2449 }
2450
2451 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2452 struct t10_alua_tg_pt_gp *tg_pt_gp,
2453 const char *page,
2454 size_t count)
2455 {
2456 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2457 }
2458
2459 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2460
2461 /*
2462 * preferred
2463 */
2464
2465 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2466 struct t10_alua_tg_pt_gp *tg_pt_gp,
2467 char *page)
2468 {
2469 return core_alua_show_preferred_bit(tg_pt_gp, page);
2470 }
2471
2472 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2473 struct t10_alua_tg_pt_gp *tg_pt_gp,
2474 const char *page,
2475 size_t count)
2476 {
2477 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2478 }
2479
2480 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2481
2482 /*
2483 * tg_pt_gp_id
2484 */
2485 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2486 struct t10_alua_tg_pt_gp *tg_pt_gp,
2487 char *page)
2488 {
2489 if (!tg_pt_gp->tg_pt_gp_valid_id)
2490 return 0;
2491
2492 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2493 }
2494
2495 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2496 struct t10_alua_tg_pt_gp *tg_pt_gp,
2497 const char *page,
2498 size_t count)
2499 {
2500 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2501 unsigned long tg_pt_gp_id;
2502 int ret;
2503
2504 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2505 if (ret < 0) {
2506 pr_err("strict_strtoul() returned %d for"
2507 " tg_pt_gp_id\n", ret);
2508 return -EINVAL;
2509 }
2510 if (tg_pt_gp_id > 0x0000ffff) {
2511 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2512 " 0x0000ffff\n", tg_pt_gp_id);
2513 return -EINVAL;
2514 }
2515
2516 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2517 if (ret < 0)
2518 return -EINVAL;
2519
2520 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2521 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2522 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2523 tg_pt_gp->tg_pt_gp_id);
2524
2525 return count;
2526 }
2527
2528 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2529
2530 /*
2531 * members
2532 */
2533 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2534 struct t10_alua_tg_pt_gp *tg_pt_gp,
2535 char *page)
2536 {
2537 struct se_port *port;
2538 struct se_portal_group *tpg;
2539 struct se_lun *lun;
2540 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2541 ssize_t len = 0, cur_len;
2542 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2543
2544 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2545
2546 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2547 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2548 tg_pt_gp_mem_list) {
2549 port = tg_pt_gp_mem->tg_pt;
2550 tpg = port->sep_tpg;
2551 lun = port->sep_lun;
2552
2553 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2554 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2555 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2556 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2557 config_item_name(&lun->lun_group.cg_item));
2558 cur_len++; /* Extra byte for NULL terminator */
2559
2560 if ((cur_len + len) > PAGE_SIZE) {
2561 pr_warn("Ran out of lu_gp_show_attr"
2562 "_members buffer\n");
2563 break;
2564 }
2565 memcpy(page+len, buf, cur_len);
2566 len += cur_len;
2567 }
2568 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2569
2570 return len;
2571 }
2572
2573 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2574
2575 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2576 tg_pt_gp_group);
2577
2578 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2579 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2580 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2581 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2582 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2583 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2584 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2585 &target_core_alua_tg_pt_gp_preferred.attr,
2586 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2587 &target_core_alua_tg_pt_gp_members.attr,
2588 NULL,
2589 };
2590
2591 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2592 {
2593 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2594 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2595
2596 core_alua_free_tg_pt_gp(tg_pt_gp);
2597 }
2598
2599 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2600 .release = target_core_alua_tg_pt_gp_release,
2601 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2602 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2603 };
2604
2605 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2606 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2607 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2608 .ct_owner = THIS_MODULE,
2609 };
2610
2611 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2612
2613 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2614
2615 static struct config_group *target_core_alua_create_tg_pt_gp(
2616 struct config_group *group,
2617 const char *name)
2618 {
2619 struct t10_alua *alua = container_of(group, struct t10_alua,
2620 alua_tg_pt_gps_group);
2621 struct t10_alua_tg_pt_gp *tg_pt_gp;
2622 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2623 struct config_group *alua_tg_pt_gp_cg = NULL;
2624 struct config_item *alua_tg_pt_gp_ci = NULL;
2625
2626 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2627 if (!tg_pt_gp)
2628 return NULL;
2629
2630 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2631 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2632
2633 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2634 &target_core_alua_tg_pt_gp_cit);
2635
2636 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2637 " Group: alua/tg_pt_gps/%s\n",
2638 config_item_name(alua_tg_pt_gp_ci));
2639
2640 return alua_tg_pt_gp_cg;
2641 }
2642
2643 static void target_core_alua_drop_tg_pt_gp(
2644 struct config_group *group,
2645 struct config_item *item)
2646 {
2647 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2648 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2649
2650 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2651 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2652 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2653 /*
2654 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2655 * -> target_core_alua_tg_pt_gp_release().
2656 */
2657 config_item_put(item);
2658 }
2659
2660 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2661 .make_group = &target_core_alua_create_tg_pt_gp,
2662 .drop_item = &target_core_alua_drop_tg_pt_gp,
2663 };
2664
2665 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2666 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2667 .ct_owner = THIS_MODULE,
2668 };
2669
2670 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2671
2672 /* Start functions for struct config_item_type target_core_alua_cit */
2673
2674 /*
2675 * target_core_alua_cit is a ConfigFS group that lives under
2676 * /sys/kernel/config/target/core/alua. There are default groups
2677 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2678 * target_core_alua_cit in target_core_init_configfs() below.
2679 */
2680 static struct config_item_type target_core_alua_cit = {
2681 .ct_item_ops = NULL,
2682 .ct_attrs = NULL,
2683 .ct_owner = THIS_MODULE,
2684 };
2685
2686 /* End functions for struct config_item_type target_core_alua_cit */
2687
2688 /* Start functions for struct config_item_type target_core_stat_cit */
2689
2690 static struct config_group *target_core_stat_mkdir(
2691 struct config_group *group,
2692 const char *name)
2693 {
2694 return ERR_PTR(-ENOSYS);
2695 }
2696
2697 static void target_core_stat_rmdir(
2698 struct config_group *group,
2699 struct config_item *item)
2700 {
2701 return;
2702 }
2703
2704 static struct configfs_group_operations target_core_stat_group_ops = {
2705 .make_group = &target_core_stat_mkdir,
2706 .drop_item = &target_core_stat_rmdir,
2707 };
2708
2709 static struct config_item_type target_core_stat_cit = {
2710 .ct_group_ops = &target_core_stat_group_ops,
2711 .ct_owner = THIS_MODULE,
2712 };
2713
2714 /* End functions for struct config_item_type target_core_stat_cit */
2715
2716 /* Start functions for struct config_item_type target_core_hba_cit */
2717
2718 static struct config_group *target_core_make_subdev(
2719 struct config_group *group,
2720 const char *name)
2721 {
2722 struct t10_alua_tg_pt_gp *tg_pt_gp;
2723 struct se_subsystem_dev *se_dev;
2724 struct se_subsystem_api *t;
2725 struct config_item *hba_ci = &group->cg_item;
2726 struct se_hba *hba = item_to_hba(hba_ci);
2727 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2728 struct config_group *dev_stat_grp = NULL;
2729 int errno = -ENOMEM, ret;
2730
2731 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2732 if (ret)
2733 return ERR_PTR(ret);
2734 /*
2735 * Locate the struct se_subsystem_api from parent's struct se_hba.
2736 */
2737 t = hba->transport;
2738
2739 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2740 if (!se_dev) {
2741 pr_err("Unable to allocate memory for"
2742 " struct se_subsystem_dev\n");
2743 goto unlock;
2744 }
2745 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2746 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2747 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2748 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2749 spin_lock_init(&se_dev->t10_pr.registration_lock);
2750 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2751 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2752 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2753 spin_lock_init(&se_dev->se_dev_lock);
2754 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2755 se_dev->t10_wwn.t10_sub_dev = se_dev;
2756 se_dev->t10_alua.t10_sub_dev = se_dev;
2757 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2758
2759 se_dev->se_dev_hba = hba;
2760 dev_cg = &se_dev->se_dev_group;
2761
2762 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2763 GFP_KERNEL);
2764 if (!dev_cg->default_groups)
2765 goto out;
2766 /*
2767 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2768 * for ->allocate_virtdevice()
2769 *
2770 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2771 * has been called successfully in the next level up in the
2772 * configfs tree for device object's struct config_group.
2773 */
2774 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2775 if (!se_dev->se_dev_su_ptr) {
2776 pr_err("Unable to locate subsystem dependent pointer"
2777 " from allocate_virtdevice()\n");
2778 goto out;
2779 }
2780
2781 config_group_init_type_name(&se_dev->se_dev_group, name,
2782 &target_core_dev_cit);
2783 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2784 &target_core_dev_attrib_cit);
2785 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2786 &target_core_dev_pr_cit);
2787 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2788 &target_core_dev_wwn_cit);
2789 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2790 "alua", &target_core_alua_tg_pt_gps_cit);
2791 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2792 "statistics", &target_core_stat_cit);
2793
2794 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2795 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2796 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2797 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2798 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2799 dev_cg->default_groups[5] = NULL;
2800 /*
2801 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2802 */
2803 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2804 if (!tg_pt_gp)
2805 goto out;
2806
2807 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2808 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2809 GFP_KERNEL);
2810 if (!tg_pt_gp_cg->default_groups) {
2811 pr_err("Unable to allocate tg_pt_gp_cg->"
2812 "default_groups\n");
2813 goto out;
2814 }
2815
2816 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2817 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2818 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2819 tg_pt_gp_cg->default_groups[1] = NULL;
2820 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2821 /*
2822 * Add core/$HBA/$DEV/statistics/ default groups
2823 */
2824 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2825 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2826 GFP_KERNEL);
2827 if (!dev_stat_grp->default_groups) {
2828 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2829 goto out;
2830 }
2831 target_stat_setup_dev_default_groups(se_dev);
2832
2833 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2834 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2835
2836 mutex_unlock(&hba->hba_access_mutex);
2837 return &se_dev->se_dev_group;
2838 out:
2839 if (se_dev->t10_alua.default_tg_pt_gp) {
2840 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2841 se_dev->t10_alua.default_tg_pt_gp = NULL;
2842 }
2843 if (dev_stat_grp)
2844 kfree(dev_stat_grp->default_groups);
2845 if (tg_pt_gp_cg)
2846 kfree(tg_pt_gp_cg->default_groups);
2847 if (dev_cg)
2848 kfree(dev_cg->default_groups);
2849 if (se_dev->se_dev_su_ptr)
2850 t->free_device(se_dev->se_dev_su_ptr);
2851 kfree(se_dev);
2852 unlock:
2853 mutex_unlock(&hba->hba_access_mutex);
2854 return ERR_PTR(errno);
2855 }
2856
2857 static void target_core_drop_subdev(
2858 struct config_group *group,
2859 struct config_item *item)
2860 {
2861 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2862 struct se_subsystem_dev, se_dev_group);
2863 struct se_hba *hba;
2864 struct se_subsystem_api *t;
2865 struct config_item *df_item;
2866 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2867 int i;
2868
2869 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2870
2871 mutex_lock(&hba->hba_access_mutex);
2872 t = hba->transport;
2873
2874 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2875 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2876 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2877 dev_stat_grp->default_groups[i] = NULL;
2878 config_item_put(df_item);
2879 }
2880 kfree(dev_stat_grp->default_groups);
2881
2882 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2883 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2884 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2885 tg_pt_gp_cg->default_groups[i] = NULL;
2886 config_item_put(df_item);
2887 }
2888 kfree(tg_pt_gp_cg->default_groups);
2889 /*
2890 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2891 * directly from target_core_alua_tg_pt_gp_release().
2892 */
2893 se_dev->t10_alua.default_tg_pt_gp = NULL;
2894
2895 dev_cg = &se_dev->se_dev_group;
2896 for (i = 0; dev_cg->default_groups[i]; i++) {
2897 df_item = &dev_cg->default_groups[i]->cg_item;
2898 dev_cg->default_groups[i] = NULL;
2899 config_item_put(df_item);
2900 }
2901 /*
2902 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2903 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2904 */
2905 config_item_put(item);
2906 mutex_unlock(&hba->hba_access_mutex);
2907 }
2908
2909 static struct configfs_group_operations target_core_hba_group_ops = {
2910 .make_group = target_core_make_subdev,
2911 .drop_item = target_core_drop_subdev,
2912 };
2913
2914 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2915 #define SE_HBA_ATTR(_name, _mode) \
2916 static struct target_core_hba_attribute \
2917 target_core_hba_##_name = \
2918 __CONFIGFS_EATTR(_name, _mode, \
2919 target_core_hba_show_attr_##_name, \
2920 target_core_hba_store_attr_##_name);
2921
2922 #define SE_HBA_ATTR_RO(_name) \
2923 static struct target_core_hba_attribute \
2924 target_core_hba_##_name = \
2925 __CONFIGFS_EATTR_RO(_name, \
2926 target_core_hba_show_attr_##_name);
2927
2928 static ssize_t target_core_hba_show_attr_hba_info(
2929 struct se_hba *hba,
2930 char *page)
2931 {
2932 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2933 hba->hba_id, hba->transport->name,
2934 TARGET_CORE_CONFIGFS_VERSION);
2935 }
2936
2937 SE_HBA_ATTR_RO(hba_info);
2938
2939 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2940 char *page)
2941 {
2942 int hba_mode = 0;
2943
2944 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2945 hba_mode = 1;
2946
2947 return sprintf(page, "%d\n", hba_mode);
2948 }
2949
2950 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2951 const char *page, size_t count)
2952 {
2953 struct se_subsystem_api *transport = hba->transport;
2954 unsigned long mode_flag;
2955 int ret;
2956
2957 if (transport->pmode_enable_hba == NULL)
2958 return -EINVAL;
2959
2960 ret = strict_strtoul(page, 0, &mode_flag);
2961 if (ret < 0) {
2962 pr_err("Unable to extract hba mode flag: %d\n", ret);
2963 return -EINVAL;
2964 }
2965
2966 spin_lock(&hba->device_lock);
2967 if (!list_empty(&hba->hba_dev_list)) {
2968 pr_err("Unable to set hba_mode with active devices\n");
2969 spin_unlock(&hba->device_lock);
2970 return -EINVAL;
2971 }
2972 spin_unlock(&hba->device_lock);
2973
2974 ret = transport->pmode_enable_hba(hba, mode_flag);
2975 if (ret < 0)
2976 return -EINVAL;
2977 if (ret > 0)
2978 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2979 else if (ret == 0)
2980 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2981
2982 return count;
2983 }
2984
2985 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2986
2987 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2988
2989 static void target_core_hba_release(struct config_item *item)
2990 {
2991 struct se_hba *hba = container_of(to_config_group(item),
2992 struct se_hba, hba_group);
2993 core_delete_hba(hba);
2994 }
2995
2996 static struct configfs_attribute *target_core_hba_attrs[] = {
2997 &target_core_hba_hba_info.attr,
2998 &target_core_hba_hba_mode.attr,
2999 NULL,
3000 };
3001
3002 static struct configfs_item_operations target_core_hba_item_ops = {
3003 .release = target_core_hba_release,
3004 .show_attribute = target_core_hba_attr_show,
3005 .store_attribute = target_core_hba_attr_store,
3006 };
3007
3008 static struct config_item_type target_core_hba_cit = {
3009 .ct_item_ops = &target_core_hba_item_ops,
3010 .ct_group_ops = &target_core_hba_group_ops,
3011 .ct_attrs = target_core_hba_attrs,
3012 .ct_owner = THIS_MODULE,
3013 };
3014
3015 static struct config_group *target_core_call_addhbatotarget(
3016 struct config_group *group,
3017 const char *name)
3018 {
3019 char *se_plugin_str, *str, *str2;
3020 struct se_hba *hba;
3021 char buf[TARGET_CORE_NAME_MAX_LEN];
3022 unsigned long plugin_dep_id = 0;
3023 int ret;
3024
3025 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3026 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3027 pr_err("Passed *name strlen(): %d exceeds"
3028 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3029 TARGET_CORE_NAME_MAX_LEN);
3030 return ERR_PTR(-ENAMETOOLONG);
3031 }
3032 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3033
3034 str = strstr(buf, "_");
3035 if (!str) {
3036 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3037 return ERR_PTR(-EINVAL);
3038 }
3039 se_plugin_str = buf;
3040 /*
3041 * Special case for subsystem plugins that have "_" in their names.
3042 * Namely rd_direct and rd_mcp..
3043 */
3044 str2 = strstr(str+1, "_");
3045 if (str2) {
3046 *str2 = '\0'; /* Terminate for *se_plugin_str */
3047 str2++; /* Skip to start of plugin dependent ID */
3048 str = str2;
3049 } else {
3050 *str = '\0'; /* Terminate for *se_plugin_str */
3051 str++; /* Skip to start of plugin dependent ID */
3052 }
3053
3054 ret = strict_strtoul(str, 0, &plugin_dep_id);
3055 if (ret < 0) {
3056 pr_err("strict_strtoul() returned %d for"
3057 " plugin_dep_id\n", ret);
3058 return ERR_PTR(-EINVAL);
3059 }
3060 /*
3061 * Load up TCM subsystem plugins if they have not already been loaded.
3062 */
3063 transport_subsystem_check_init();
3064
3065 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3066 if (IS_ERR(hba))
3067 return ERR_CAST(hba);
3068
3069 config_group_init_type_name(&hba->hba_group, name,
3070 &target_core_hba_cit);
3071
3072 return &hba->hba_group;
3073 }
3074
3075 static void target_core_call_delhbafromtarget(
3076 struct config_group *group,
3077 struct config_item *item)
3078 {
3079 /*
3080 * core_delete_hba() is called from target_core_hba_item_ops->release()
3081 * -> target_core_hba_release()
3082 */
3083 config_item_put(item);
3084 }
3085
3086 static struct configfs_group_operations target_core_group_ops = {
3087 .make_group = target_core_call_addhbatotarget,
3088 .drop_item = target_core_call_delhbafromtarget,
3089 };
3090
3091 static struct config_item_type target_core_cit = {
3092 .ct_item_ops = NULL,
3093 .ct_group_ops = &target_core_group_ops,
3094 .ct_attrs = NULL,
3095 .ct_owner = THIS_MODULE,
3096 };
3097
3098 /* Stop functions for struct config_item_type target_core_hba_cit */
3099
3100 static int __init target_core_init_configfs(void)
3101 {
3102 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3103 struct config_group *lu_gp_cg = NULL;
3104 struct configfs_subsystem *subsys;
3105 struct t10_alua_lu_gp *lu_gp;
3106 int ret;
3107
3108 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3109 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3110 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3111
3112 subsys = target_core_subsystem[0];
3113 config_group_init(&subsys->su_group);
3114 mutex_init(&subsys->su_mutex);
3115
3116 INIT_LIST_HEAD(&g_tf_list);
3117 mutex_init(&g_tf_lock);
3118 ret = init_se_kmem_caches();
3119 if (ret < 0)
3120 return ret;
3121 /*
3122 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3123 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3124 */
3125 target_cg = &subsys->su_group;
3126 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3127 GFP_KERNEL);
3128 if (!target_cg->default_groups) {
3129 pr_err("Unable to allocate target_cg->default_groups\n");
3130 goto out_global;
3131 }
3132
3133 config_group_init_type_name(&target_core_hbagroup,
3134 "core", &target_core_cit);
3135 target_cg->default_groups[0] = &target_core_hbagroup;
3136 target_cg->default_groups[1] = NULL;
3137 /*
3138 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3139 */
3140 hba_cg = &target_core_hbagroup;
3141 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3142 GFP_KERNEL);
3143 if (!hba_cg->default_groups) {
3144 pr_err("Unable to allocate hba_cg->default_groups\n");
3145 goto out_global;
3146 }
3147 config_group_init_type_name(&alua_group,
3148 "alua", &target_core_alua_cit);
3149 hba_cg->default_groups[0] = &alua_group;
3150 hba_cg->default_groups[1] = NULL;
3151 /*
3152 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3153 * groups under /sys/kernel/config/target/core/alua/
3154 */
3155 alua_cg = &alua_group;
3156 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3157 GFP_KERNEL);
3158 if (!alua_cg->default_groups) {
3159 pr_err("Unable to allocate alua_cg->default_groups\n");
3160 goto out_global;
3161 }
3162
3163 config_group_init_type_name(&alua_lu_gps_group,
3164 "lu_gps", &target_core_alua_lu_gps_cit);
3165 alua_cg->default_groups[0] = &alua_lu_gps_group;
3166 alua_cg->default_groups[1] = NULL;
3167 /*
3168 * Add core/alua/lu_gps/default_lu_gp
3169 */
3170 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3171 if (IS_ERR(lu_gp))
3172 goto out_global;
3173
3174 lu_gp_cg = &alua_lu_gps_group;
3175 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3176 GFP_KERNEL);
3177 if (!lu_gp_cg->default_groups) {
3178 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3179 goto out_global;
3180 }
3181
3182 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3183 &target_core_alua_lu_gp_cit);
3184 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3185 lu_gp_cg->default_groups[1] = NULL;
3186 default_lu_gp = lu_gp;
3187 /*
3188 * Register the target_core_mod subsystem with configfs.
3189 */
3190 ret = configfs_register_subsystem(subsys);
3191 if (ret < 0) {
3192 pr_err("Error %d while registering subsystem %s\n",
3193 ret, subsys->su_group.cg_item.ci_namebuf);
3194 goto out_global;
3195 }
3196 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3197 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3198 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3199 /*
3200 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3201 */
3202 ret = rd_module_init();
3203 if (ret < 0)
3204 goto out;
3205
3206 if (core_dev_setup_virtual_lun0() < 0)
3207 goto out;
3208
3209 return 0;
3210
3211 out:
3212 configfs_unregister_subsystem(subsys);
3213 core_dev_release_virtual_lun0();
3214 rd_module_exit();
3215 out_global:
3216 if (default_lu_gp) {
3217 core_alua_free_lu_gp(default_lu_gp);
3218 default_lu_gp = NULL;
3219 }
3220 if (lu_gp_cg)
3221 kfree(lu_gp_cg->default_groups);
3222 if (alua_cg)
3223 kfree(alua_cg->default_groups);
3224 if (hba_cg)
3225 kfree(hba_cg->default_groups);
3226 kfree(target_cg->default_groups);
3227 release_se_kmem_caches();
3228 return ret;
3229 }
3230
3231 static void __exit target_core_exit_configfs(void)
3232 {
3233 struct configfs_subsystem *subsys;
3234 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3235 struct config_item *item;
3236 int i;
3237
3238 subsys = target_core_subsystem[0];
3239
3240 lu_gp_cg = &alua_lu_gps_group;
3241 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3242 item = &lu_gp_cg->default_groups[i]->cg_item;
3243 lu_gp_cg->default_groups[i] = NULL;
3244 config_item_put(item);
3245 }
3246 kfree(lu_gp_cg->default_groups);
3247 lu_gp_cg->default_groups = NULL;
3248
3249 alua_cg = &alua_group;
3250 for (i = 0; alua_cg->default_groups[i]; i++) {
3251 item = &alua_cg->default_groups[i]->cg_item;
3252 alua_cg->default_groups[i] = NULL;
3253 config_item_put(item);
3254 }
3255 kfree(alua_cg->default_groups);
3256 alua_cg->default_groups = NULL;
3257
3258 hba_cg = &target_core_hbagroup;
3259 for (i = 0; hba_cg->default_groups[i]; i++) {
3260 item = &hba_cg->default_groups[i]->cg_item;
3261 hba_cg->default_groups[i] = NULL;
3262 config_item_put(item);
3263 }
3264 kfree(hba_cg->default_groups);
3265 hba_cg->default_groups = NULL;
3266 /*
3267 * We expect subsys->su_group.default_groups to be released
3268 * by configfs subsystem provider logic..
3269 */
3270 configfs_unregister_subsystem(subsys);
3271 kfree(subsys->su_group.default_groups);
3272
3273 core_alua_free_lu_gp(default_lu_gp);
3274 default_lu_gp = NULL;
3275
3276 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3277 " Infrastructure\n");
3278
3279 core_dev_release_virtual_lun0();
3280 rd_module_exit();
3281 release_se_kmem_caches();
3282 }
3283
3284 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3285 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3286 MODULE_LICENSE("GPL");
3287
3288 module_init(target_core_init_configfs);
3289 module_exit(target_core_exit_configfs);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree