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Merge branch 'for-linus-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / target / target_core_configfs.c
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 LIST_HEAD(g_tf_list);
56 static DEFINE_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->sess_get_index) {
425 pr_err("Missing tfo->sess_get_index()\n");
426 return -EINVAL;
427 }
428 if (!tfo->write_pending) {
429 pr_err("Missing tfo->write_pending()\n");
430 return -EINVAL;
431 }
432 if (!tfo->write_pending_status) {
433 pr_err("Missing tfo->write_pending_status()\n");
434 return -EINVAL;
435 }
436 if (!tfo->set_default_node_attributes) {
437 pr_err("Missing tfo->set_default_node_attributes()\n");
438 return -EINVAL;
439 }
440 if (!tfo->get_task_tag) {
441 pr_err("Missing tfo->get_task_tag()\n");
442 return -EINVAL;
443 }
444 if (!tfo->get_cmd_state) {
445 pr_err("Missing tfo->get_cmd_state()\n");
446 return -EINVAL;
447 }
448 if (!tfo->queue_data_in) {
449 pr_err("Missing tfo->queue_data_in()\n");
450 return -EINVAL;
451 }
452 if (!tfo->queue_status) {
453 pr_err("Missing tfo->queue_status()\n");
454 return -EINVAL;
455 }
456 if (!tfo->queue_tm_rsp) {
457 pr_err("Missing tfo->queue_tm_rsp()\n");
458 return -EINVAL;
459 }
460 if (!tfo->set_fabric_sense_len) {
461 pr_err("Missing tfo->set_fabric_sense_len()\n");
462 return -EINVAL;
463 }
464 if (!tfo->get_fabric_sense_len) {
465 pr_err("Missing tfo->get_fabric_sense_len()\n");
466 return -EINVAL;
467 }
468 /*
469 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
470 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
471 * target_core_fabric_configfs.c WWN+TPG group context code.
472 */
473 if (!tfo->fabric_make_wwn) {
474 pr_err("Missing tfo->fabric_make_wwn()\n");
475 return -EINVAL;
476 }
477 if (!tfo->fabric_drop_wwn) {
478 pr_err("Missing tfo->fabric_drop_wwn()\n");
479 return -EINVAL;
480 }
481 if (!tfo->fabric_make_tpg) {
482 pr_err("Missing tfo->fabric_make_tpg()\n");
483 return -EINVAL;
484 }
485 if (!tfo->fabric_drop_tpg) {
486 pr_err("Missing tfo->fabric_drop_tpg()\n");
487 return -EINVAL;
488 }
489
490 return 0;
491 }
492
493 /*
494 * Called 2nd from fabric module with returned parameter of
495 * struct target_fabric_configfs * from target_fabric_configfs_init().
496 *
497 * Upon a successful registration, the new fabric's struct config_item is
498 * return. Also, a pointer to this struct is set in the passed
499 * struct target_fabric_configfs.
500 */
501 int target_fabric_configfs_register(
502 struct target_fabric_configfs *tf)
503 {
504 int ret;
505
506 if (!tf) {
507 pr_err("Unable to locate target_fabric_configfs"
508 " pointer\n");
509 return -EINVAL;
510 }
511 if (!tf->tf_subsys) {
512 pr_err("Unable to target struct config_subsystem"
513 " pointer\n");
514 return -EINVAL;
515 }
516 ret = target_fabric_tf_ops_check(tf);
517 if (ret < 0)
518 return ret;
519
520 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
521 ">>>>>>>>>>\n");
522 return 0;
523 }
524 EXPORT_SYMBOL(target_fabric_configfs_register);
525
526 void target_fabric_configfs_deregister(
527 struct target_fabric_configfs *tf)
528 {
529 struct configfs_subsystem *su;
530
531 if (!tf) {
532 pr_err("Unable to locate passed target_fabric_"
533 "configfs\n");
534 return;
535 }
536 su = tf->tf_subsys;
537 if (!su) {
538 pr_err("Unable to locate passed tf->tf_subsys"
539 " pointer\n");
540 return;
541 }
542 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
543 ">>>>>>>>>>>>\n");
544 mutex_lock(&g_tf_lock);
545 if (atomic_read(&tf->tf_access_cnt)) {
546 mutex_unlock(&g_tf_lock);
547 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
548 tf->tf_name);
549 BUG();
550 }
551 list_del(&tf->tf_list);
552 mutex_unlock(&g_tf_lock);
553
554 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
555 " %s\n", tf->tf_name);
556 tf->tf_module = NULL;
557 tf->tf_subsys = NULL;
558 kfree(tf);
559
560 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
561 ">>>>>\n");
562 }
563 EXPORT_SYMBOL(target_fabric_configfs_deregister);
564
565 /*##############################################################################
566 // Stop functions called by external Target Fabrics Modules
567 //############################################################################*/
568
569 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
570
571 #define DEF_DEV_ATTRIB_SHOW(_name) \
572 static ssize_t target_core_dev_show_attr_##_name( \
573 struct se_dev_attrib *da, \
574 char *page) \
575 { \
576 struct se_device *dev; \
577 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
578 ssize_t rb; \
579 \
580 spin_lock(&se_dev->se_dev_lock); \
581 dev = se_dev->se_dev_ptr; \
582 if (!dev) { \
583 spin_unlock(&se_dev->se_dev_lock); \
584 return -ENODEV; \
585 } \
586 rb = snprintf(page, PAGE_SIZE, "%u\n", \
587 (u32)dev->se_sub_dev->se_dev_attrib._name); \
588 spin_unlock(&se_dev->se_dev_lock); \
589 \
590 return rb; \
591 }
592
593 #define DEF_DEV_ATTRIB_STORE(_name) \
594 static ssize_t target_core_dev_store_attr_##_name( \
595 struct se_dev_attrib *da, \
596 const char *page, \
597 size_t count) \
598 { \
599 struct se_device *dev; \
600 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
601 unsigned long val; \
602 int ret; \
603 \
604 spin_lock(&se_dev->se_dev_lock); \
605 dev = se_dev->se_dev_ptr; \
606 if (!dev) { \
607 spin_unlock(&se_dev->se_dev_lock); \
608 return -ENODEV; \
609 } \
610 ret = strict_strtoul(page, 0, &val); \
611 if (ret < 0) { \
612 spin_unlock(&se_dev->se_dev_lock); \
613 pr_err("strict_strtoul() failed with" \
614 " ret: %d\n", ret); \
615 return -EINVAL; \
616 } \
617 ret = se_dev_set_##_name(dev, (u32)val); \
618 spin_unlock(&se_dev->se_dev_lock); \
619 \
620 return (!ret) ? count : -EINVAL; \
621 }
622
623 #define DEF_DEV_ATTRIB(_name) \
624 DEF_DEV_ATTRIB_SHOW(_name); \
625 DEF_DEV_ATTRIB_STORE(_name);
626
627 #define DEF_DEV_ATTRIB_RO(_name) \
628 DEF_DEV_ATTRIB_SHOW(_name);
629
630 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
631 #define SE_DEV_ATTR(_name, _mode) \
632 static struct target_core_dev_attrib_attribute \
633 target_core_dev_attrib_##_name = \
634 __CONFIGFS_EATTR(_name, _mode, \
635 target_core_dev_show_attr_##_name, \
636 target_core_dev_store_attr_##_name);
637
638 #define SE_DEV_ATTR_RO(_name); \
639 static struct target_core_dev_attrib_attribute \
640 target_core_dev_attrib_##_name = \
641 __CONFIGFS_EATTR_RO(_name, \
642 target_core_dev_show_attr_##_name);
643
644 DEF_DEV_ATTRIB(emulate_dpo);
645 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
646
647 DEF_DEV_ATTRIB(emulate_fua_write);
648 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
649
650 DEF_DEV_ATTRIB(emulate_fua_read);
651 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
652
653 DEF_DEV_ATTRIB(emulate_write_cache);
654 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
655
656 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
657 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
658
659 DEF_DEV_ATTRIB(emulate_tas);
660 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
661
662 DEF_DEV_ATTRIB(emulate_tpu);
663 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
664
665 DEF_DEV_ATTRIB(emulate_tpws);
666 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
667
668 DEF_DEV_ATTRIB(enforce_pr_isids);
669 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
670
671 DEF_DEV_ATTRIB(is_nonrot);
672 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
673
674 DEF_DEV_ATTRIB(emulate_rest_reord);
675 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
676
677 DEF_DEV_ATTRIB_RO(hw_block_size);
678 SE_DEV_ATTR_RO(hw_block_size);
679
680 DEF_DEV_ATTRIB(block_size);
681 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
682
683 DEF_DEV_ATTRIB_RO(hw_max_sectors);
684 SE_DEV_ATTR_RO(hw_max_sectors);
685
686 DEF_DEV_ATTRIB(fabric_max_sectors);
687 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
688
689 DEF_DEV_ATTRIB(optimal_sectors);
690 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
691
692 DEF_DEV_ATTRIB_RO(hw_queue_depth);
693 SE_DEV_ATTR_RO(hw_queue_depth);
694
695 DEF_DEV_ATTRIB(queue_depth);
696 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
697
698 DEF_DEV_ATTRIB(max_unmap_lba_count);
699 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
700
701 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
702 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
703
704 DEF_DEV_ATTRIB(unmap_granularity);
705 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
706
707 DEF_DEV_ATTRIB(unmap_granularity_alignment);
708 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
709
710 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
711
712 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
713 &target_core_dev_attrib_emulate_dpo.attr,
714 &target_core_dev_attrib_emulate_fua_write.attr,
715 &target_core_dev_attrib_emulate_fua_read.attr,
716 &target_core_dev_attrib_emulate_write_cache.attr,
717 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
718 &target_core_dev_attrib_emulate_tas.attr,
719 &target_core_dev_attrib_emulate_tpu.attr,
720 &target_core_dev_attrib_emulate_tpws.attr,
721 &target_core_dev_attrib_enforce_pr_isids.attr,
722 &target_core_dev_attrib_is_nonrot.attr,
723 &target_core_dev_attrib_emulate_rest_reord.attr,
724 &target_core_dev_attrib_hw_block_size.attr,
725 &target_core_dev_attrib_block_size.attr,
726 &target_core_dev_attrib_hw_max_sectors.attr,
727 &target_core_dev_attrib_fabric_max_sectors.attr,
728 &target_core_dev_attrib_optimal_sectors.attr,
729 &target_core_dev_attrib_hw_queue_depth.attr,
730 &target_core_dev_attrib_queue_depth.attr,
731 &target_core_dev_attrib_max_unmap_lba_count.attr,
732 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
733 &target_core_dev_attrib_unmap_granularity.attr,
734 &target_core_dev_attrib_unmap_granularity_alignment.attr,
735 NULL,
736 };
737
738 static struct configfs_item_operations target_core_dev_attrib_ops = {
739 .show_attribute = target_core_dev_attrib_attr_show,
740 .store_attribute = target_core_dev_attrib_attr_store,
741 };
742
743 static struct config_item_type target_core_dev_attrib_cit = {
744 .ct_item_ops = &target_core_dev_attrib_ops,
745 .ct_attrs = target_core_dev_attrib_attrs,
746 .ct_owner = THIS_MODULE,
747 };
748
749 /* End functions for struct config_item_type target_core_dev_attrib_cit */
750
751 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
752
753 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
754 #define SE_DEV_WWN_ATTR(_name, _mode) \
755 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
756 __CONFIGFS_EATTR(_name, _mode, \
757 target_core_dev_wwn_show_attr_##_name, \
758 target_core_dev_wwn_store_attr_##_name);
759
760 #define SE_DEV_WWN_ATTR_RO(_name); \
761 do { \
762 static struct target_core_dev_wwn_attribute \
763 target_core_dev_wwn_##_name = \
764 __CONFIGFS_EATTR_RO(_name, \
765 target_core_dev_wwn_show_attr_##_name); \
766 } while (0);
767
768 /*
769 * VPD page 0x80 Unit serial
770 */
771 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
772 struct t10_wwn *t10_wwn,
773 char *page)
774 {
775 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
776 struct se_device *dev;
777
778 dev = se_dev->se_dev_ptr;
779 if (!dev)
780 return -ENODEV;
781
782 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
783 &t10_wwn->unit_serial[0]);
784 }
785
786 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
787 struct t10_wwn *t10_wwn,
788 const char *page,
789 size_t count)
790 {
791 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
792 struct se_device *dev;
793 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
794
795 /*
796 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
797 * from the struct scsi_device level firmware, do not allow
798 * VPD Unit Serial to be emulated.
799 *
800 * Note this struct scsi_device could also be emulating VPD
801 * information from its drivers/scsi LLD. But for now we assume
802 * it is doing 'the right thing' wrt a world wide unique
803 * VPD Unit Serial Number that OS dependent multipath can depend on.
804 */
805 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
806 pr_err("Underlying SCSI device firmware provided VPD"
807 " Unit Serial, ignoring request\n");
808 return -EOPNOTSUPP;
809 }
810
811 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
812 pr_err("Emulated VPD Unit Serial exceeds"
813 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
814 return -EOVERFLOW;
815 }
816 /*
817 * Check to see if any active $FABRIC_MOD exports exist. If they
818 * do exist, fail here as changing this information on the fly
819 * (underneath the initiator side OS dependent multipath code)
820 * could cause negative effects.
821 */
822 dev = su_dev->se_dev_ptr;
823 if (dev) {
824 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
825 pr_err("Unable to set VPD Unit Serial while"
826 " active %d $FABRIC_MOD exports exist\n",
827 atomic_read(&dev->dev_export_obj.obj_access_count));
828 return -EINVAL;
829 }
830 }
831 /*
832 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
833 *
834 * Also, strip any newline added from the userspace
835 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
836 */
837 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
838 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
839 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
840 "%s", strstrip(buf));
841 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
842
843 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
844 " %s\n", su_dev->t10_wwn.unit_serial);
845
846 return count;
847 }
848
849 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
850
851 /*
852 * VPD page 0x83 Protocol Identifier
853 */
854 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
855 struct t10_wwn *t10_wwn,
856 char *page)
857 {
858 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
859 struct se_device *dev;
860 struct t10_vpd *vpd;
861 unsigned char buf[VPD_TMP_BUF_SIZE];
862 ssize_t len = 0;
863
864 dev = se_dev->se_dev_ptr;
865 if (!dev)
866 return -ENODEV;
867
868 memset(buf, 0, VPD_TMP_BUF_SIZE);
869
870 spin_lock(&t10_wwn->t10_vpd_lock);
871 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
872 if (!vpd->protocol_identifier_set)
873 continue;
874
875 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
876
877 if (len + strlen(buf) >= PAGE_SIZE)
878 break;
879
880 len += sprintf(page+len, "%s", buf);
881 }
882 spin_unlock(&t10_wwn->t10_vpd_lock);
883
884 return len;
885 }
886
887 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
888 struct t10_wwn *t10_wwn,
889 const char *page,
890 size_t count)
891 {
892 return -ENOSYS;
893 }
894
895 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
896
897 /*
898 * Generic wrapper for dumping VPD identifiers by association.
899 */
900 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
901 static ssize_t target_core_dev_wwn_show_attr_##_name( \
902 struct t10_wwn *t10_wwn, \
903 char *page) \
904 { \
905 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
906 struct se_device *dev; \
907 struct t10_vpd *vpd; \
908 unsigned char buf[VPD_TMP_BUF_SIZE]; \
909 ssize_t len = 0; \
910 \
911 dev = se_dev->se_dev_ptr; \
912 if (!dev) \
913 return -ENODEV; \
914 \
915 spin_lock(&t10_wwn->t10_vpd_lock); \
916 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
917 if (vpd->association != _assoc) \
918 continue; \
919 \
920 memset(buf, 0, VPD_TMP_BUF_SIZE); \
921 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
922 if (len + strlen(buf) >= PAGE_SIZE) \
923 break; \
924 len += sprintf(page+len, "%s", buf); \
925 \
926 memset(buf, 0, VPD_TMP_BUF_SIZE); \
927 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
928 if (len + strlen(buf) >= PAGE_SIZE) \
929 break; \
930 len += sprintf(page+len, "%s", buf); \
931 \
932 memset(buf, 0, VPD_TMP_BUF_SIZE); \
933 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
934 if (len + strlen(buf) >= PAGE_SIZE) \
935 break; \
936 len += sprintf(page+len, "%s", buf); \
937 } \
938 spin_unlock(&t10_wwn->t10_vpd_lock); \
939 \
940 return len; \
941 }
942
943 /*
944 * VPD page 0x83 Association: Logical Unit
945 */
946 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
947
948 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
949 struct t10_wwn *t10_wwn,
950 const char *page,
951 size_t count)
952 {
953 return -ENOSYS;
954 }
955
956 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
957
958 /*
959 * VPD page 0x83 Association: Target Port
960 */
961 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
962
963 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
964 struct t10_wwn *t10_wwn,
965 const char *page,
966 size_t count)
967 {
968 return -ENOSYS;
969 }
970
971 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
972
973 /*
974 * VPD page 0x83 Association: SCSI Target Device
975 */
976 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
977
978 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
979 struct t10_wwn *t10_wwn,
980 const char *page,
981 size_t count)
982 {
983 return -ENOSYS;
984 }
985
986 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
987
988 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
989
990 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
991 &target_core_dev_wwn_vpd_unit_serial.attr,
992 &target_core_dev_wwn_vpd_protocol_identifier.attr,
993 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
994 &target_core_dev_wwn_vpd_assoc_target_port.attr,
995 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
996 NULL,
997 };
998
999 static struct configfs_item_operations target_core_dev_wwn_ops = {
1000 .show_attribute = target_core_dev_wwn_attr_show,
1001 .store_attribute = target_core_dev_wwn_attr_store,
1002 };
1003
1004 static struct config_item_type target_core_dev_wwn_cit = {
1005 .ct_item_ops = &target_core_dev_wwn_ops,
1006 .ct_attrs = target_core_dev_wwn_attrs,
1007 .ct_owner = THIS_MODULE,
1008 };
1009
1010 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1011
1012 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1013
1014 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1015 #define SE_DEV_PR_ATTR(_name, _mode) \
1016 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1017 __CONFIGFS_EATTR(_name, _mode, \
1018 target_core_dev_pr_show_attr_##_name, \
1019 target_core_dev_pr_store_attr_##_name);
1020
1021 #define SE_DEV_PR_ATTR_RO(_name); \
1022 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1023 __CONFIGFS_EATTR_RO(_name, \
1024 target_core_dev_pr_show_attr_##_name);
1025
1026 /*
1027 * res_holder
1028 */
1029 static ssize_t target_core_dev_pr_show_spc3_res(
1030 struct se_device *dev,
1031 char *page,
1032 ssize_t *len)
1033 {
1034 struct se_node_acl *se_nacl;
1035 struct t10_pr_registration *pr_reg;
1036 char i_buf[PR_REG_ISID_ID_LEN];
1037 int prf_isid;
1038
1039 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1040
1041 spin_lock(&dev->dev_reservation_lock);
1042 pr_reg = dev->dev_pr_res_holder;
1043 if (!pr_reg) {
1044 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1045 spin_unlock(&dev->dev_reservation_lock);
1046 return *len;
1047 }
1048 se_nacl = pr_reg->pr_reg_nacl;
1049 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1050 PR_REG_ISID_ID_LEN);
1051
1052 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1053 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1054 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1055 spin_unlock(&dev->dev_reservation_lock);
1056
1057 return *len;
1058 }
1059
1060 static ssize_t target_core_dev_pr_show_spc2_res(
1061 struct se_device *dev,
1062 char *page,
1063 ssize_t *len)
1064 {
1065 struct se_node_acl *se_nacl;
1066
1067 spin_lock(&dev->dev_reservation_lock);
1068 se_nacl = dev->dev_reserved_node_acl;
1069 if (!se_nacl) {
1070 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1071 spin_unlock(&dev->dev_reservation_lock);
1072 return *len;
1073 }
1074 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1075 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1076 se_nacl->initiatorname);
1077 spin_unlock(&dev->dev_reservation_lock);
1078
1079 return *len;
1080 }
1081
1082 static ssize_t target_core_dev_pr_show_attr_res_holder(
1083 struct se_subsystem_dev *su_dev,
1084 char *page)
1085 {
1086 ssize_t len = 0;
1087
1088 if (!su_dev->se_dev_ptr)
1089 return -ENODEV;
1090
1091 switch (su_dev->t10_pr.res_type) {
1092 case SPC3_PERSISTENT_RESERVATIONS:
1093 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1094 page, &len);
1095 break;
1096 case SPC2_RESERVATIONS:
1097 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1098 page, &len);
1099 break;
1100 case SPC_PASSTHROUGH:
1101 len += sprintf(page+len, "Passthrough\n");
1102 break;
1103 default:
1104 len += sprintf(page+len, "Unknown\n");
1105 break;
1106 }
1107
1108 return len;
1109 }
1110
1111 SE_DEV_PR_ATTR_RO(res_holder);
1112
1113 /*
1114 * res_pr_all_tgt_pts
1115 */
1116 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1117 struct se_subsystem_dev *su_dev,
1118 char *page)
1119 {
1120 struct se_device *dev;
1121 struct t10_pr_registration *pr_reg;
1122 ssize_t len = 0;
1123
1124 dev = su_dev->se_dev_ptr;
1125 if (!dev)
1126 return -ENODEV;
1127
1128 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1129 return len;
1130
1131 spin_lock(&dev->dev_reservation_lock);
1132 pr_reg = dev->dev_pr_res_holder;
1133 if (!pr_reg) {
1134 len = sprintf(page, "No SPC-3 Reservation holder\n");
1135 spin_unlock(&dev->dev_reservation_lock);
1136 return len;
1137 }
1138 /*
1139 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1140 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1141 */
1142 if (pr_reg->pr_reg_all_tg_pt)
1143 len = sprintf(page, "SPC-3 Reservation: All Target"
1144 " Ports registration\n");
1145 else
1146 len = sprintf(page, "SPC-3 Reservation: Single"
1147 " Target Port registration\n");
1148 spin_unlock(&dev->dev_reservation_lock);
1149
1150 return len;
1151 }
1152
1153 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1154
1155 /*
1156 * res_pr_generation
1157 */
1158 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1159 struct se_subsystem_dev *su_dev,
1160 char *page)
1161 {
1162 if (!su_dev->se_dev_ptr)
1163 return -ENODEV;
1164
1165 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1166 return 0;
1167
1168 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1169 }
1170
1171 SE_DEV_PR_ATTR_RO(res_pr_generation);
1172
1173 /*
1174 * res_pr_holder_tg_port
1175 */
1176 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1177 struct se_subsystem_dev *su_dev,
1178 char *page)
1179 {
1180 struct se_device *dev;
1181 struct se_node_acl *se_nacl;
1182 struct se_lun *lun;
1183 struct se_portal_group *se_tpg;
1184 struct t10_pr_registration *pr_reg;
1185 struct target_core_fabric_ops *tfo;
1186 ssize_t len = 0;
1187
1188 dev = su_dev->se_dev_ptr;
1189 if (!dev)
1190 return -ENODEV;
1191
1192 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1193 return len;
1194
1195 spin_lock(&dev->dev_reservation_lock);
1196 pr_reg = dev->dev_pr_res_holder;
1197 if (!pr_reg) {
1198 len = sprintf(page, "No SPC-3 Reservation holder\n");
1199 spin_unlock(&dev->dev_reservation_lock);
1200 return len;
1201 }
1202 se_nacl = pr_reg->pr_reg_nacl;
1203 se_tpg = se_nacl->se_tpg;
1204 lun = pr_reg->pr_reg_tg_pt_lun;
1205 tfo = se_tpg->se_tpg_tfo;
1206
1207 len += sprintf(page+len, "SPC-3 Reservation: %s"
1208 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1209 tfo->tpg_get_wwn(se_tpg));
1210 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1211 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1212 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1213 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1214 tfo->get_fabric_name(), lun->unpacked_lun);
1215 spin_unlock(&dev->dev_reservation_lock);
1216
1217 return len;
1218 }
1219
1220 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1221
1222 /*
1223 * res_pr_registered_i_pts
1224 */
1225 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1226 struct se_subsystem_dev *su_dev,
1227 char *page)
1228 {
1229 struct target_core_fabric_ops *tfo;
1230 struct t10_pr_registration *pr_reg;
1231 unsigned char buf[384];
1232 char i_buf[PR_REG_ISID_ID_LEN];
1233 ssize_t len = 0;
1234 int reg_count = 0, prf_isid;
1235
1236 if (!su_dev->se_dev_ptr)
1237 return -ENODEV;
1238
1239 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1240 return len;
1241
1242 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1243
1244 spin_lock(&su_dev->t10_pr.registration_lock);
1245 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1246 pr_reg_list) {
1247
1248 memset(buf, 0, 384);
1249 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1250 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1251 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1252 PR_REG_ISID_ID_LEN);
1253 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1254 tfo->get_fabric_name(),
1255 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1256 &i_buf[0] : "", pr_reg->pr_res_key,
1257 pr_reg->pr_res_generation);
1258
1259 if (len + strlen(buf) >= PAGE_SIZE)
1260 break;
1261
1262 len += sprintf(page+len, "%s", buf);
1263 reg_count++;
1264 }
1265 spin_unlock(&su_dev->t10_pr.registration_lock);
1266
1267 if (!reg_count)
1268 len += sprintf(page+len, "None\n");
1269
1270 return len;
1271 }
1272
1273 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1274
1275 /*
1276 * res_pr_type
1277 */
1278 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1279 struct se_subsystem_dev *su_dev,
1280 char *page)
1281 {
1282 struct se_device *dev;
1283 struct t10_pr_registration *pr_reg;
1284 ssize_t len = 0;
1285
1286 dev = su_dev->se_dev_ptr;
1287 if (!dev)
1288 return -ENODEV;
1289
1290 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1291 return len;
1292
1293 spin_lock(&dev->dev_reservation_lock);
1294 pr_reg = dev->dev_pr_res_holder;
1295 if (!pr_reg) {
1296 len = sprintf(page, "No SPC-3 Reservation holder\n");
1297 spin_unlock(&dev->dev_reservation_lock);
1298 return len;
1299 }
1300 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1301 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1302 spin_unlock(&dev->dev_reservation_lock);
1303
1304 return len;
1305 }
1306
1307 SE_DEV_PR_ATTR_RO(res_pr_type);
1308
1309 /*
1310 * res_type
1311 */
1312 static ssize_t target_core_dev_pr_show_attr_res_type(
1313 struct se_subsystem_dev *su_dev,
1314 char *page)
1315 {
1316 ssize_t len = 0;
1317
1318 if (!su_dev->se_dev_ptr)
1319 return -ENODEV;
1320
1321 switch (su_dev->t10_pr.res_type) {
1322 case SPC3_PERSISTENT_RESERVATIONS:
1323 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1324 break;
1325 case SPC2_RESERVATIONS:
1326 len = sprintf(page, "SPC2_RESERVATIONS\n");
1327 break;
1328 case SPC_PASSTHROUGH:
1329 len = sprintf(page, "SPC_PASSTHROUGH\n");
1330 break;
1331 default:
1332 len = sprintf(page, "UNKNOWN\n");
1333 break;
1334 }
1335
1336 return len;
1337 }
1338
1339 SE_DEV_PR_ATTR_RO(res_type);
1340
1341 /*
1342 * res_aptpl_active
1343 */
1344
1345 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1346 struct se_subsystem_dev *su_dev,
1347 char *page)
1348 {
1349 if (!su_dev->se_dev_ptr)
1350 return -ENODEV;
1351
1352 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1353 return 0;
1354
1355 return sprintf(page, "APTPL Bit Status: %s\n",
1356 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1357 }
1358
1359 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1360
1361 /*
1362 * res_aptpl_metadata
1363 */
1364 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1365 struct se_subsystem_dev *su_dev,
1366 char *page)
1367 {
1368 if (!su_dev->se_dev_ptr)
1369 return -ENODEV;
1370
1371 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1372 return 0;
1373
1374 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1375 }
1376
1377 enum {
1378 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1379 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1380 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1381 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1382 };
1383
1384 static match_table_t tokens = {
1385 {Opt_initiator_fabric, "initiator_fabric=%s"},
1386 {Opt_initiator_node, "initiator_node=%s"},
1387 {Opt_initiator_sid, "initiator_sid=%s"},
1388 {Opt_sa_res_key, "sa_res_key=%s"},
1389 {Opt_res_holder, "res_holder=%d"},
1390 {Opt_res_type, "res_type=%d"},
1391 {Opt_res_scope, "res_scope=%d"},
1392 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1393 {Opt_mapped_lun, "mapped_lun=%d"},
1394 {Opt_target_fabric, "target_fabric=%s"},
1395 {Opt_target_node, "target_node=%s"},
1396 {Opt_tpgt, "tpgt=%d"},
1397 {Opt_port_rtpi, "port_rtpi=%d"},
1398 {Opt_target_lun, "target_lun=%d"},
1399 {Opt_err, NULL}
1400 };
1401
1402 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1403 struct se_subsystem_dev *su_dev,
1404 const char *page,
1405 size_t count)
1406 {
1407 struct se_device *dev;
1408 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1409 unsigned char *t_fabric = NULL, *t_port = NULL;
1410 char *orig, *ptr, *arg_p, *opts;
1411 substring_t args[MAX_OPT_ARGS];
1412 unsigned long long tmp_ll;
1413 u64 sa_res_key = 0;
1414 u32 mapped_lun = 0, target_lun = 0;
1415 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1416 u16 port_rpti = 0, tpgt = 0;
1417 u8 type = 0, scope;
1418
1419 dev = su_dev->se_dev_ptr;
1420 if (!dev)
1421 return -ENODEV;
1422
1423 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1424 return 0;
1425
1426 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1427 pr_debug("Unable to process APTPL metadata while"
1428 " active fabric exports exist\n");
1429 return -EINVAL;
1430 }
1431
1432 opts = kstrdup(page, GFP_KERNEL);
1433 if (!opts)
1434 return -ENOMEM;
1435
1436 orig = opts;
1437 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1438 if (!*ptr)
1439 continue;
1440
1441 token = match_token(ptr, tokens, args);
1442 switch (token) {
1443 case Opt_initiator_fabric:
1444 i_fabric = match_strdup(&args[0]);
1445 if (!i_fabric) {
1446 ret = -ENOMEM;
1447 goto out;
1448 }
1449 break;
1450 case Opt_initiator_node:
1451 i_port = match_strdup(&args[0]);
1452 if (!i_port) {
1453 ret = -ENOMEM;
1454 goto out;
1455 }
1456 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1457 pr_err("APTPL metadata initiator_node="
1458 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1459 PR_APTPL_MAX_IPORT_LEN);
1460 ret = -EINVAL;
1461 break;
1462 }
1463 break;
1464 case Opt_initiator_sid:
1465 isid = match_strdup(&args[0]);
1466 if (!isid) {
1467 ret = -ENOMEM;
1468 goto out;
1469 }
1470 if (strlen(isid) >= PR_REG_ISID_LEN) {
1471 pr_err("APTPL metadata initiator_isid"
1472 "= exceeds PR_REG_ISID_LEN: %d\n",
1473 PR_REG_ISID_LEN);
1474 ret = -EINVAL;
1475 break;
1476 }
1477 break;
1478 case Opt_sa_res_key:
1479 arg_p = match_strdup(&args[0]);
1480 if (!arg_p) {
1481 ret = -ENOMEM;
1482 goto out;
1483 }
1484 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1485 if (ret < 0) {
1486 pr_err("strict_strtoull() failed for"
1487 " sa_res_key=\n");
1488 goto out;
1489 }
1490 sa_res_key = (u64)tmp_ll;
1491 break;
1492 /*
1493 * PR APTPL Metadata for Reservation
1494 */
1495 case Opt_res_holder:
1496 match_int(args, &arg);
1497 res_holder = arg;
1498 break;
1499 case Opt_res_type:
1500 match_int(args, &arg);
1501 type = (u8)arg;
1502 break;
1503 case Opt_res_scope:
1504 match_int(args, &arg);
1505 scope = (u8)arg;
1506 break;
1507 case Opt_res_all_tg_pt:
1508 match_int(args, &arg);
1509 all_tg_pt = (int)arg;
1510 break;
1511 case Opt_mapped_lun:
1512 match_int(args, &arg);
1513 mapped_lun = (u32)arg;
1514 break;
1515 /*
1516 * PR APTPL Metadata for Target Port
1517 */
1518 case Opt_target_fabric:
1519 t_fabric = match_strdup(&args[0]);
1520 if (!t_fabric) {
1521 ret = -ENOMEM;
1522 goto out;
1523 }
1524 break;
1525 case Opt_target_node:
1526 t_port = match_strdup(&args[0]);
1527 if (!t_port) {
1528 ret = -ENOMEM;
1529 goto out;
1530 }
1531 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1532 pr_err("APTPL metadata target_node="
1533 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1534 PR_APTPL_MAX_TPORT_LEN);
1535 ret = -EINVAL;
1536 break;
1537 }
1538 break;
1539 case Opt_tpgt:
1540 match_int(args, &arg);
1541 tpgt = (u16)arg;
1542 break;
1543 case Opt_port_rtpi:
1544 match_int(args, &arg);
1545 port_rpti = (u16)arg;
1546 break;
1547 case Opt_target_lun:
1548 match_int(args, &arg);
1549 target_lun = (u32)arg;
1550 break;
1551 default:
1552 break;
1553 }
1554 }
1555
1556 if (!i_port || !t_port || !sa_res_key) {
1557 pr_err("Illegal parameters for APTPL registration\n");
1558 ret = -EINVAL;
1559 goto out;
1560 }
1561
1562 if (res_holder && !(type)) {
1563 pr_err("Illegal PR type: 0x%02x for reservation"
1564 " holder\n", type);
1565 ret = -EINVAL;
1566 goto out;
1567 }
1568
1569 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1570 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1571 res_holder, all_tg_pt, type);
1572 out:
1573 kfree(i_fabric);
1574 kfree(i_port);
1575 kfree(isid);
1576 kfree(t_fabric);
1577 kfree(t_port);
1578 kfree(orig);
1579 return (ret == 0) ? count : ret;
1580 }
1581
1582 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1583
1584 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1585
1586 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1587 &target_core_dev_pr_res_holder.attr,
1588 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1589 &target_core_dev_pr_res_pr_generation.attr,
1590 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1591 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1592 &target_core_dev_pr_res_pr_type.attr,
1593 &target_core_dev_pr_res_type.attr,
1594 &target_core_dev_pr_res_aptpl_active.attr,
1595 &target_core_dev_pr_res_aptpl_metadata.attr,
1596 NULL,
1597 };
1598
1599 static struct configfs_item_operations target_core_dev_pr_ops = {
1600 .show_attribute = target_core_dev_pr_attr_show,
1601 .store_attribute = target_core_dev_pr_attr_store,
1602 };
1603
1604 static struct config_item_type target_core_dev_pr_cit = {
1605 .ct_item_ops = &target_core_dev_pr_ops,
1606 .ct_attrs = target_core_dev_pr_attrs,
1607 .ct_owner = THIS_MODULE,
1608 };
1609
1610 /* End functions for struct config_item_type target_core_dev_pr_cit */
1611
1612 /* Start functions for struct config_item_type target_core_dev_cit */
1613
1614 static ssize_t target_core_show_dev_info(void *p, char *page)
1615 {
1616 struct se_subsystem_dev *se_dev = p;
1617 struct se_hba *hba = se_dev->se_dev_hba;
1618 struct se_subsystem_api *t = hba->transport;
1619 int bl = 0;
1620 ssize_t read_bytes = 0;
1621
1622 if (!se_dev->se_dev_ptr)
1623 return -ENODEV;
1624
1625 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1626 read_bytes += bl;
1627 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1628 return read_bytes;
1629 }
1630
1631 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1632 .attr = { .ca_owner = THIS_MODULE,
1633 .ca_name = "info",
1634 .ca_mode = S_IRUGO },
1635 .show = target_core_show_dev_info,
1636 .store = NULL,
1637 };
1638
1639 static ssize_t target_core_store_dev_control(
1640 void *p,
1641 const char *page,
1642 size_t count)
1643 {
1644 struct se_subsystem_dev *se_dev = p;
1645 struct se_hba *hba = se_dev->se_dev_hba;
1646 struct se_subsystem_api *t = hba->transport;
1647
1648 if (!se_dev->se_dev_su_ptr) {
1649 pr_err("Unable to locate struct se_subsystem_dev>se"
1650 "_dev_su_ptr\n");
1651 return -EINVAL;
1652 }
1653
1654 return t->set_configfs_dev_params(hba, se_dev, page, count);
1655 }
1656
1657 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1658 .attr = { .ca_owner = THIS_MODULE,
1659 .ca_name = "control",
1660 .ca_mode = S_IWUSR },
1661 .show = NULL,
1662 .store = target_core_store_dev_control,
1663 };
1664
1665 static ssize_t target_core_show_dev_alias(void *p, char *page)
1666 {
1667 struct se_subsystem_dev *se_dev = p;
1668
1669 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1670 return 0;
1671
1672 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1673 }
1674
1675 static ssize_t target_core_store_dev_alias(
1676 void *p,
1677 const char *page,
1678 size_t count)
1679 {
1680 struct se_subsystem_dev *se_dev = p;
1681 struct se_hba *hba = se_dev->se_dev_hba;
1682 ssize_t read_bytes;
1683
1684 if (count > (SE_DEV_ALIAS_LEN-1)) {
1685 pr_err("alias count: %d exceeds"
1686 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1687 SE_DEV_ALIAS_LEN-1);
1688 return -EINVAL;
1689 }
1690
1691 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1692 "%s", page);
1693 if (!read_bytes)
1694 return -EINVAL;
1695 if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
1696 se_dev->se_dev_alias[read_bytes - 1] = '\0';
1697
1698 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1699
1700 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1701 config_item_name(&hba->hba_group.cg_item),
1702 config_item_name(&se_dev->se_dev_group.cg_item),
1703 se_dev->se_dev_alias);
1704
1705 return read_bytes;
1706 }
1707
1708 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1709 .attr = { .ca_owner = THIS_MODULE,
1710 .ca_name = "alias",
1711 .ca_mode = S_IRUGO | S_IWUSR },
1712 .show = target_core_show_dev_alias,
1713 .store = target_core_store_dev_alias,
1714 };
1715
1716 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1717 {
1718 struct se_subsystem_dev *se_dev = p;
1719
1720 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1721 return 0;
1722
1723 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1724 }
1725
1726 static ssize_t target_core_store_dev_udev_path(
1727 void *p,
1728 const char *page,
1729 size_t count)
1730 {
1731 struct se_subsystem_dev *se_dev = p;
1732 struct se_hba *hba = se_dev->se_dev_hba;
1733 ssize_t read_bytes;
1734
1735 if (count > (SE_UDEV_PATH_LEN-1)) {
1736 pr_err("udev_path count: %d exceeds"
1737 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1738 SE_UDEV_PATH_LEN-1);
1739 return -EINVAL;
1740 }
1741
1742 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1743 "%s", page);
1744 if (!read_bytes)
1745 return -EINVAL;
1746 if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
1747 se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
1748
1749 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1750
1751 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1752 config_item_name(&hba->hba_group.cg_item),
1753 config_item_name(&se_dev->se_dev_group.cg_item),
1754 se_dev->se_dev_udev_path);
1755
1756 return read_bytes;
1757 }
1758
1759 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1760 .attr = { .ca_owner = THIS_MODULE,
1761 .ca_name = "udev_path",
1762 .ca_mode = S_IRUGO | S_IWUSR },
1763 .show = target_core_show_dev_udev_path,
1764 .store = target_core_store_dev_udev_path,
1765 };
1766
1767 static ssize_t target_core_store_dev_enable(
1768 void *p,
1769 const char *page,
1770 size_t count)
1771 {
1772 struct se_subsystem_dev *se_dev = p;
1773 struct se_device *dev;
1774 struct se_hba *hba = se_dev->se_dev_hba;
1775 struct se_subsystem_api *t = hba->transport;
1776 char *ptr;
1777
1778 ptr = strstr(page, "1");
1779 if (!ptr) {
1780 pr_err("For dev_enable ops, only valid value"
1781 " is \"1\"\n");
1782 return -EINVAL;
1783 }
1784 if (se_dev->se_dev_ptr) {
1785 pr_err("se_dev->se_dev_ptr already set for storage"
1786 " object\n");
1787 return -EEXIST;
1788 }
1789
1790 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1791 return -EINVAL;
1792
1793 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1794 if (IS_ERR(dev))
1795 return PTR_ERR(dev);
1796 else if (!dev)
1797 return -EINVAL;
1798
1799 se_dev->se_dev_ptr = dev;
1800 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1801 " %p\n", se_dev->se_dev_ptr);
1802
1803 return count;
1804 }
1805
1806 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1807 .attr = { .ca_owner = THIS_MODULE,
1808 .ca_name = "enable",
1809 .ca_mode = S_IWUSR },
1810 .show = NULL,
1811 .store = target_core_store_dev_enable,
1812 };
1813
1814 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1815 {
1816 struct se_device *dev;
1817 struct se_subsystem_dev *su_dev = p;
1818 struct config_item *lu_ci;
1819 struct t10_alua_lu_gp *lu_gp;
1820 struct t10_alua_lu_gp_member *lu_gp_mem;
1821 ssize_t len = 0;
1822
1823 dev = su_dev->se_dev_ptr;
1824 if (!dev)
1825 return -ENODEV;
1826
1827 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1828 return len;
1829
1830 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1831 if (!lu_gp_mem) {
1832 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1833 " pointer\n");
1834 return -EINVAL;
1835 }
1836
1837 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1838 lu_gp = lu_gp_mem->lu_gp;
1839 if (lu_gp) {
1840 lu_ci = &lu_gp->lu_gp_group.cg_item;
1841 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1842 config_item_name(lu_ci), lu_gp->lu_gp_id);
1843 }
1844 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1845
1846 return len;
1847 }
1848
1849 static ssize_t target_core_store_alua_lu_gp(
1850 void *p,
1851 const char *page,
1852 size_t count)
1853 {
1854 struct se_device *dev;
1855 struct se_subsystem_dev *su_dev = p;
1856 struct se_hba *hba = su_dev->se_dev_hba;
1857 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1858 struct t10_alua_lu_gp_member *lu_gp_mem;
1859 unsigned char buf[LU_GROUP_NAME_BUF];
1860 int move = 0;
1861
1862 dev = su_dev->se_dev_ptr;
1863 if (!dev)
1864 return -ENODEV;
1865
1866 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1867 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1868 config_item_name(&hba->hba_group.cg_item),
1869 config_item_name(&su_dev->se_dev_group.cg_item));
1870 return -EINVAL;
1871 }
1872 if (count > LU_GROUP_NAME_BUF) {
1873 pr_err("ALUA LU Group Alias too large!\n");
1874 return -EINVAL;
1875 }
1876 memset(buf, 0, LU_GROUP_NAME_BUF);
1877 memcpy(buf, page, count);
1878 /*
1879 * Any ALUA logical unit alias besides "NULL" means we will be
1880 * making a new group association.
1881 */
1882 if (strcmp(strstrip(buf), "NULL")) {
1883 /*
1884 * core_alua_get_lu_gp_by_name() will increment reference to
1885 * struct t10_alua_lu_gp. This reference is released with
1886 * core_alua_get_lu_gp_by_name below().
1887 */
1888 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1889 if (!lu_gp_new)
1890 return -ENODEV;
1891 }
1892 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1893 if (!lu_gp_mem) {
1894 if (lu_gp_new)
1895 core_alua_put_lu_gp_from_name(lu_gp_new);
1896 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1897 " pointer\n");
1898 return -EINVAL;
1899 }
1900
1901 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1902 lu_gp = lu_gp_mem->lu_gp;
1903 if (lu_gp) {
1904 /*
1905 * Clearing an existing lu_gp association, and replacing
1906 * with NULL
1907 */
1908 if (!lu_gp_new) {
1909 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1910 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1911 " %hu\n",
1912 config_item_name(&hba->hba_group.cg_item),
1913 config_item_name(&su_dev->se_dev_group.cg_item),
1914 config_item_name(&lu_gp->lu_gp_group.cg_item),
1915 lu_gp->lu_gp_id);
1916
1917 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1918 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1919
1920 return count;
1921 }
1922 /*
1923 * Removing existing association of lu_gp_mem with lu_gp
1924 */
1925 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1926 move = 1;
1927 }
1928 /*
1929 * Associate lu_gp_mem with lu_gp_new.
1930 */
1931 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1932 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1933
1934 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1935 " core/alua/lu_gps/%s, ID: %hu\n",
1936 (move) ? "Moving" : "Adding",
1937 config_item_name(&hba->hba_group.cg_item),
1938 config_item_name(&su_dev->se_dev_group.cg_item),
1939 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1940 lu_gp_new->lu_gp_id);
1941
1942 core_alua_put_lu_gp_from_name(lu_gp_new);
1943 return count;
1944 }
1945
1946 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1947 .attr = { .ca_owner = THIS_MODULE,
1948 .ca_name = "alua_lu_gp",
1949 .ca_mode = S_IRUGO | S_IWUSR },
1950 .show = target_core_show_alua_lu_gp,
1951 .store = target_core_store_alua_lu_gp,
1952 };
1953
1954 static struct configfs_attribute *lio_core_dev_attrs[] = {
1955 &target_core_attr_dev_info.attr,
1956 &target_core_attr_dev_control.attr,
1957 &target_core_attr_dev_alias.attr,
1958 &target_core_attr_dev_udev_path.attr,
1959 &target_core_attr_dev_enable.attr,
1960 &target_core_attr_dev_alua_lu_gp.attr,
1961 NULL,
1962 };
1963
1964 static void target_core_dev_release(struct config_item *item)
1965 {
1966 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1967 struct se_subsystem_dev, se_dev_group);
1968 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1969 struct se_subsystem_api *t = hba->transport;
1970 struct config_group *dev_cg = &se_dev->se_dev_group;
1971
1972 kfree(dev_cg->default_groups);
1973 /*
1974 * This pointer will set when the storage is enabled with:
1975 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1976 */
1977 if (se_dev->se_dev_ptr) {
1978 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1979 "virtual_device() for se_dev_ptr: %p\n",
1980 se_dev->se_dev_ptr);
1981
1982 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1983 } else {
1984 /*
1985 * Release struct se_subsystem_dev->se_dev_su_ptr..
1986 */
1987 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1988 "device() for se_dev_su_ptr: %p\n",
1989 se_dev->se_dev_su_ptr);
1990
1991 t->free_device(se_dev->se_dev_su_ptr);
1992 }
1993
1994 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
1995 "_dev_t: %p\n", se_dev);
1996 kfree(se_dev);
1997 }
1998
1999 static ssize_t target_core_dev_show(struct config_item *item,
2000 struct configfs_attribute *attr,
2001 char *page)
2002 {
2003 struct se_subsystem_dev *se_dev = container_of(
2004 to_config_group(item), struct se_subsystem_dev,
2005 se_dev_group);
2006 struct target_core_configfs_attribute *tc_attr = container_of(
2007 attr, struct target_core_configfs_attribute, attr);
2008
2009 if (!tc_attr->show)
2010 return -EINVAL;
2011
2012 return tc_attr->show(se_dev, page);
2013 }
2014
2015 static ssize_t target_core_dev_store(struct config_item *item,
2016 struct configfs_attribute *attr,
2017 const char *page, size_t count)
2018 {
2019 struct se_subsystem_dev *se_dev = container_of(
2020 to_config_group(item), struct se_subsystem_dev,
2021 se_dev_group);
2022 struct target_core_configfs_attribute *tc_attr = container_of(
2023 attr, struct target_core_configfs_attribute, attr);
2024
2025 if (!tc_attr->store)
2026 return -EINVAL;
2027
2028 return tc_attr->store(se_dev, page, count);
2029 }
2030
2031 static struct configfs_item_operations target_core_dev_item_ops = {
2032 .release = target_core_dev_release,
2033 .show_attribute = target_core_dev_show,
2034 .store_attribute = target_core_dev_store,
2035 };
2036
2037 static struct config_item_type target_core_dev_cit = {
2038 .ct_item_ops = &target_core_dev_item_ops,
2039 .ct_attrs = lio_core_dev_attrs,
2040 .ct_owner = THIS_MODULE,
2041 };
2042
2043 /* End functions for struct config_item_type target_core_dev_cit */
2044
2045 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2046
2047 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2048 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2049 static struct target_core_alua_lu_gp_attribute \
2050 target_core_alua_lu_gp_##_name = \
2051 __CONFIGFS_EATTR(_name, _mode, \
2052 target_core_alua_lu_gp_show_attr_##_name, \
2053 target_core_alua_lu_gp_store_attr_##_name);
2054
2055 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2056 static struct target_core_alua_lu_gp_attribute \
2057 target_core_alua_lu_gp_##_name = \
2058 __CONFIGFS_EATTR_RO(_name, \
2059 target_core_alua_lu_gp_show_attr_##_name);
2060
2061 /*
2062 * lu_gp_id
2063 */
2064 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2065 struct t10_alua_lu_gp *lu_gp,
2066 char *page)
2067 {
2068 if (!lu_gp->lu_gp_valid_id)
2069 return 0;
2070
2071 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2072 }
2073
2074 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2075 struct t10_alua_lu_gp *lu_gp,
2076 const char *page,
2077 size_t count)
2078 {
2079 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2080 unsigned long lu_gp_id;
2081 int ret;
2082
2083 ret = strict_strtoul(page, 0, &lu_gp_id);
2084 if (ret < 0) {
2085 pr_err("strict_strtoul() returned %d for"
2086 " lu_gp_id\n", ret);
2087 return -EINVAL;
2088 }
2089 if (lu_gp_id > 0x0000ffff) {
2090 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2091 " 0x0000ffff\n", lu_gp_id);
2092 return -EINVAL;
2093 }
2094
2095 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2096 if (ret < 0)
2097 return -EINVAL;
2098
2099 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2100 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2101 config_item_name(&alua_lu_gp_cg->cg_item),
2102 lu_gp->lu_gp_id);
2103
2104 return count;
2105 }
2106
2107 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2108
2109 /*
2110 * members
2111 */
2112 static ssize_t target_core_alua_lu_gp_show_attr_members(
2113 struct t10_alua_lu_gp *lu_gp,
2114 char *page)
2115 {
2116 struct se_device *dev;
2117 struct se_hba *hba;
2118 struct se_subsystem_dev *su_dev;
2119 struct t10_alua_lu_gp_member *lu_gp_mem;
2120 ssize_t len = 0, cur_len;
2121 unsigned char buf[LU_GROUP_NAME_BUF];
2122
2123 memset(buf, 0, LU_GROUP_NAME_BUF);
2124
2125 spin_lock(&lu_gp->lu_gp_lock);
2126 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2127 dev = lu_gp_mem->lu_gp_mem_dev;
2128 su_dev = dev->se_sub_dev;
2129 hba = su_dev->se_dev_hba;
2130
2131 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2132 config_item_name(&hba->hba_group.cg_item),
2133 config_item_name(&su_dev->se_dev_group.cg_item));
2134 cur_len++; /* Extra byte for NULL terminator */
2135
2136 if ((cur_len + len) > PAGE_SIZE) {
2137 pr_warn("Ran out of lu_gp_show_attr"
2138 "_members buffer\n");
2139 break;
2140 }
2141 memcpy(page+len, buf, cur_len);
2142 len += cur_len;
2143 }
2144 spin_unlock(&lu_gp->lu_gp_lock);
2145
2146 return len;
2147 }
2148
2149 SE_DEV_ALUA_LU_ATTR_RO(members);
2150
2151 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2152
2153 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2154 &target_core_alua_lu_gp_lu_gp_id.attr,
2155 &target_core_alua_lu_gp_members.attr,
2156 NULL,
2157 };
2158
2159 static void target_core_alua_lu_gp_release(struct config_item *item)
2160 {
2161 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2162 struct t10_alua_lu_gp, lu_gp_group);
2163
2164 core_alua_free_lu_gp(lu_gp);
2165 }
2166
2167 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2168 .release = target_core_alua_lu_gp_release,
2169 .show_attribute = target_core_alua_lu_gp_attr_show,
2170 .store_attribute = target_core_alua_lu_gp_attr_store,
2171 };
2172
2173 static struct config_item_type target_core_alua_lu_gp_cit = {
2174 .ct_item_ops = &target_core_alua_lu_gp_ops,
2175 .ct_attrs = target_core_alua_lu_gp_attrs,
2176 .ct_owner = THIS_MODULE,
2177 };
2178
2179 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2180
2181 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2182
2183 static struct config_group *target_core_alua_create_lu_gp(
2184 struct config_group *group,
2185 const char *name)
2186 {
2187 struct t10_alua_lu_gp *lu_gp;
2188 struct config_group *alua_lu_gp_cg = NULL;
2189 struct config_item *alua_lu_gp_ci = NULL;
2190
2191 lu_gp = core_alua_allocate_lu_gp(name, 0);
2192 if (IS_ERR(lu_gp))
2193 return NULL;
2194
2195 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2196 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2197
2198 config_group_init_type_name(alua_lu_gp_cg, name,
2199 &target_core_alua_lu_gp_cit);
2200
2201 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2202 " Group: core/alua/lu_gps/%s\n",
2203 config_item_name(alua_lu_gp_ci));
2204
2205 return alua_lu_gp_cg;
2206
2207 }
2208
2209 static void target_core_alua_drop_lu_gp(
2210 struct config_group *group,
2211 struct config_item *item)
2212 {
2213 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2214 struct t10_alua_lu_gp, lu_gp_group);
2215
2216 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2217 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2218 config_item_name(item), lu_gp->lu_gp_id);
2219 /*
2220 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2221 * -> target_core_alua_lu_gp_release()
2222 */
2223 config_item_put(item);
2224 }
2225
2226 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2227 .make_group = &target_core_alua_create_lu_gp,
2228 .drop_item = &target_core_alua_drop_lu_gp,
2229 };
2230
2231 static struct config_item_type target_core_alua_lu_gps_cit = {
2232 .ct_item_ops = NULL,
2233 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2234 .ct_owner = THIS_MODULE,
2235 };
2236
2237 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2238
2239 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2240
2241 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2242 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2243 static struct target_core_alua_tg_pt_gp_attribute \
2244 target_core_alua_tg_pt_gp_##_name = \
2245 __CONFIGFS_EATTR(_name, _mode, \
2246 target_core_alua_tg_pt_gp_show_attr_##_name, \
2247 target_core_alua_tg_pt_gp_store_attr_##_name);
2248
2249 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2250 static struct target_core_alua_tg_pt_gp_attribute \
2251 target_core_alua_tg_pt_gp_##_name = \
2252 __CONFIGFS_EATTR_RO(_name, \
2253 target_core_alua_tg_pt_gp_show_attr_##_name);
2254
2255 /*
2256 * alua_access_state
2257 */
2258 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2259 struct t10_alua_tg_pt_gp *tg_pt_gp,
2260 char *page)
2261 {
2262 return sprintf(page, "%d\n",
2263 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2264 }
2265
2266 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2267 struct t10_alua_tg_pt_gp *tg_pt_gp,
2268 const char *page,
2269 size_t count)
2270 {
2271 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2272 unsigned long tmp;
2273 int new_state, ret;
2274
2275 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2276 pr_err("Unable to do implict ALUA on non valid"
2277 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2278 return -EINVAL;
2279 }
2280
2281 ret = strict_strtoul(page, 0, &tmp);
2282 if (ret < 0) {
2283 pr_err("Unable to extract new ALUA access state from"
2284 " %s\n", page);
2285 return -EINVAL;
2286 }
2287 new_state = (int)tmp;
2288
2289 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2290 pr_err("Unable to process implict configfs ALUA"
2291 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2292 return -EINVAL;
2293 }
2294
2295 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2296 NULL, NULL, new_state, 0);
2297 return (!ret) ? count : -EINVAL;
2298 }
2299
2300 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2301
2302 /*
2303 * alua_access_status
2304 */
2305 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2306 struct t10_alua_tg_pt_gp *tg_pt_gp,
2307 char *page)
2308 {
2309 return sprintf(page, "%s\n",
2310 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2311 }
2312
2313 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2314 struct t10_alua_tg_pt_gp *tg_pt_gp,
2315 const char *page,
2316 size_t count)
2317 {
2318 unsigned long tmp;
2319 int new_status, ret;
2320
2321 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2322 pr_err("Unable to do set ALUA access status on non"
2323 " valid tg_pt_gp ID: %hu\n",
2324 tg_pt_gp->tg_pt_gp_valid_id);
2325 return -EINVAL;
2326 }
2327
2328 ret = strict_strtoul(page, 0, &tmp);
2329 if (ret < 0) {
2330 pr_err("Unable to extract new ALUA access status"
2331 " from %s\n", page);
2332 return -EINVAL;
2333 }
2334 new_status = (int)tmp;
2335
2336 if ((new_status != ALUA_STATUS_NONE) &&
2337 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2338 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2339 pr_err("Illegal ALUA access status: 0x%02x\n",
2340 new_status);
2341 return -EINVAL;
2342 }
2343
2344 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2345 return count;
2346 }
2347
2348 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2349
2350 /*
2351 * alua_access_type
2352 */
2353 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2354 struct t10_alua_tg_pt_gp *tg_pt_gp,
2355 char *page)
2356 {
2357 return core_alua_show_access_type(tg_pt_gp, page);
2358 }
2359
2360 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2361 struct t10_alua_tg_pt_gp *tg_pt_gp,
2362 const char *page,
2363 size_t count)
2364 {
2365 return core_alua_store_access_type(tg_pt_gp, page, count);
2366 }
2367
2368 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2369
2370 /*
2371 * alua_write_metadata
2372 */
2373 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2374 struct t10_alua_tg_pt_gp *tg_pt_gp,
2375 char *page)
2376 {
2377 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2378 }
2379
2380 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2381 struct t10_alua_tg_pt_gp *tg_pt_gp,
2382 const char *page,
2383 size_t count)
2384 {
2385 unsigned long tmp;
2386 int ret;
2387
2388 ret = strict_strtoul(page, 0, &tmp);
2389 if (ret < 0) {
2390 pr_err("Unable to extract alua_write_metadata\n");
2391 return -EINVAL;
2392 }
2393
2394 if ((tmp != 0) && (tmp != 1)) {
2395 pr_err("Illegal value for alua_write_metadata:"
2396 " %lu\n", tmp);
2397 return -EINVAL;
2398 }
2399 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2400
2401 return count;
2402 }
2403
2404 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2405
2406
2407
2408 /*
2409 * nonop_delay_msecs
2410 */
2411 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2412 struct t10_alua_tg_pt_gp *tg_pt_gp,
2413 char *page)
2414 {
2415 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2416
2417 }
2418
2419 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2420 struct t10_alua_tg_pt_gp *tg_pt_gp,
2421 const char *page,
2422 size_t count)
2423 {
2424 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2425 }
2426
2427 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2428
2429 /*
2430 * trans_delay_msecs
2431 */
2432 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2433 struct t10_alua_tg_pt_gp *tg_pt_gp,
2434 char *page)
2435 {
2436 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2437 }
2438
2439 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2440 struct t10_alua_tg_pt_gp *tg_pt_gp,
2441 const char *page,
2442 size_t count)
2443 {
2444 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2445 }
2446
2447 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2448
2449 /*
2450 * implict_trans_secs
2451 */
2452 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2453 struct t10_alua_tg_pt_gp *tg_pt_gp,
2454 char *page)
2455 {
2456 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2457 }
2458
2459 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2460 struct t10_alua_tg_pt_gp *tg_pt_gp,
2461 const char *page,
2462 size_t count)
2463 {
2464 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2465 }
2466
2467 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2468
2469 /*
2470 * preferred
2471 */
2472
2473 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2474 struct t10_alua_tg_pt_gp *tg_pt_gp,
2475 char *page)
2476 {
2477 return core_alua_show_preferred_bit(tg_pt_gp, page);
2478 }
2479
2480 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2481 struct t10_alua_tg_pt_gp *tg_pt_gp,
2482 const char *page,
2483 size_t count)
2484 {
2485 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2486 }
2487
2488 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2489
2490 /*
2491 * tg_pt_gp_id
2492 */
2493 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2494 struct t10_alua_tg_pt_gp *tg_pt_gp,
2495 char *page)
2496 {
2497 if (!tg_pt_gp->tg_pt_gp_valid_id)
2498 return 0;
2499
2500 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2501 }
2502
2503 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2504 struct t10_alua_tg_pt_gp *tg_pt_gp,
2505 const char *page,
2506 size_t count)
2507 {
2508 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2509 unsigned long tg_pt_gp_id;
2510 int ret;
2511
2512 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2513 if (ret < 0) {
2514 pr_err("strict_strtoul() returned %d for"
2515 " tg_pt_gp_id\n", ret);
2516 return -EINVAL;
2517 }
2518 if (tg_pt_gp_id > 0x0000ffff) {
2519 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2520 " 0x0000ffff\n", tg_pt_gp_id);
2521 return -EINVAL;
2522 }
2523
2524 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2525 if (ret < 0)
2526 return -EINVAL;
2527
2528 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2529 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2530 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2531 tg_pt_gp->tg_pt_gp_id);
2532
2533 return count;
2534 }
2535
2536 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2537
2538 /*
2539 * members
2540 */
2541 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2542 struct t10_alua_tg_pt_gp *tg_pt_gp,
2543 char *page)
2544 {
2545 struct se_port *port;
2546 struct se_portal_group *tpg;
2547 struct se_lun *lun;
2548 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2549 ssize_t len = 0, cur_len;
2550 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2551
2552 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2553
2554 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2555 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2556 tg_pt_gp_mem_list) {
2557 port = tg_pt_gp_mem->tg_pt;
2558 tpg = port->sep_tpg;
2559 lun = port->sep_lun;
2560
2561 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2562 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2563 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2564 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2565 config_item_name(&lun->lun_group.cg_item));
2566 cur_len++; /* Extra byte for NULL terminator */
2567
2568 if ((cur_len + len) > PAGE_SIZE) {
2569 pr_warn("Ran out of lu_gp_show_attr"
2570 "_members buffer\n");
2571 break;
2572 }
2573 memcpy(page+len, buf, cur_len);
2574 len += cur_len;
2575 }
2576 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2577
2578 return len;
2579 }
2580
2581 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2582
2583 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2584 tg_pt_gp_group);
2585
2586 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2587 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2588 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2589 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2590 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2591 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2592 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2593 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2594 &target_core_alua_tg_pt_gp_preferred.attr,
2595 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2596 &target_core_alua_tg_pt_gp_members.attr,
2597 NULL,
2598 };
2599
2600 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2601 {
2602 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2603 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2604
2605 core_alua_free_tg_pt_gp(tg_pt_gp);
2606 }
2607
2608 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2609 .release = target_core_alua_tg_pt_gp_release,
2610 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2611 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2612 };
2613
2614 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2615 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2616 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2617 .ct_owner = THIS_MODULE,
2618 };
2619
2620 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2621
2622 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2623
2624 static struct config_group *target_core_alua_create_tg_pt_gp(
2625 struct config_group *group,
2626 const char *name)
2627 {
2628 struct t10_alua *alua = container_of(group, struct t10_alua,
2629 alua_tg_pt_gps_group);
2630 struct t10_alua_tg_pt_gp *tg_pt_gp;
2631 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2632 struct config_group *alua_tg_pt_gp_cg = NULL;
2633 struct config_item *alua_tg_pt_gp_ci = NULL;
2634
2635 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2636 if (!tg_pt_gp)
2637 return NULL;
2638
2639 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2640 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2641
2642 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2643 &target_core_alua_tg_pt_gp_cit);
2644
2645 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2646 " Group: alua/tg_pt_gps/%s\n",
2647 config_item_name(alua_tg_pt_gp_ci));
2648
2649 return alua_tg_pt_gp_cg;
2650 }
2651
2652 static void target_core_alua_drop_tg_pt_gp(
2653 struct config_group *group,
2654 struct config_item *item)
2655 {
2656 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2657 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2658
2659 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2660 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2661 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2662 /*
2663 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2664 * -> target_core_alua_tg_pt_gp_release().
2665 */
2666 config_item_put(item);
2667 }
2668
2669 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2670 .make_group = &target_core_alua_create_tg_pt_gp,
2671 .drop_item = &target_core_alua_drop_tg_pt_gp,
2672 };
2673
2674 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2675 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2676 .ct_owner = THIS_MODULE,
2677 };
2678
2679 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2680
2681 /* Start functions for struct config_item_type target_core_alua_cit */
2682
2683 /*
2684 * target_core_alua_cit is a ConfigFS group that lives under
2685 * /sys/kernel/config/target/core/alua. There are default groups
2686 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2687 * target_core_alua_cit in target_core_init_configfs() below.
2688 */
2689 static struct config_item_type target_core_alua_cit = {
2690 .ct_item_ops = NULL,
2691 .ct_attrs = NULL,
2692 .ct_owner = THIS_MODULE,
2693 };
2694
2695 /* End functions for struct config_item_type target_core_alua_cit */
2696
2697 /* Start functions for struct config_item_type target_core_stat_cit */
2698
2699 static struct config_group *target_core_stat_mkdir(
2700 struct config_group *group,
2701 const char *name)
2702 {
2703 return ERR_PTR(-ENOSYS);
2704 }
2705
2706 static void target_core_stat_rmdir(
2707 struct config_group *group,
2708 struct config_item *item)
2709 {
2710 return;
2711 }
2712
2713 static struct configfs_group_operations target_core_stat_group_ops = {
2714 .make_group = &target_core_stat_mkdir,
2715 .drop_item = &target_core_stat_rmdir,
2716 };
2717
2718 static struct config_item_type target_core_stat_cit = {
2719 .ct_group_ops = &target_core_stat_group_ops,
2720 .ct_owner = THIS_MODULE,
2721 };
2722
2723 /* End functions for struct config_item_type target_core_stat_cit */
2724
2725 /* Start functions for struct config_item_type target_core_hba_cit */
2726
2727 static struct config_group *target_core_make_subdev(
2728 struct config_group *group,
2729 const char *name)
2730 {
2731 struct t10_alua_tg_pt_gp *tg_pt_gp;
2732 struct se_subsystem_dev *se_dev;
2733 struct se_subsystem_api *t;
2734 struct config_item *hba_ci = &group->cg_item;
2735 struct se_hba *hba = item_to_hba(hba_ci);
2736 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2737 struct config_group *dev_stat_grp = NULL;
2738 int errno = -ENOMEM, ret;
2739
2740 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2741 if (ret)
2742 return ERR_PTR(ret);
2743 /*
2744 * Locate the struct se_subsystem_api from parent's struct se_hba.
2745 */
2746 t = hba->transport;
2747
2748 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2749 if (!se_dev) {
2750 pr_err("Unable to allocate memory for"
2751 " struct se_subsystem_dev\n");
2752 goto unlock;
2753 }
2754 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2755 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2756 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2757 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2758 spin_lock_init(&se_dev->t10_pr.registration_lock);
2759 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2760 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2761 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2762 spin_lock_init(&se_dev->se_dev_lock);
2763 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2764 se_dev->t10_wwn.t10_sub_dev = se_dev;
2765 se_dev->t10_alua.t10_sub_dev = se_dev;
2766 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2767
2768 se_dev->se_dev_hba = hba;
2769 dev_cg = &se_dev->se_dev_group;
2770
2771 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2772 GFP_KERNEL);
2773 if (!dev_cg->default_groups)
2774 goto out;
2775 /*
2776 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2777 * for ->allocate_virtdevice()
2778 *
2779 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2780 * has been called successfully in the next level up in the
2781 * configfs tree for device object's struct config_group.
2782 */
2783 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2784 if (!se_dev->se_dev_su_ptr) {
2785 pr_err("Unable to locate subsystem dependent pointer"
2786 " from allocate_virtdevice()\n");
2787 goto out;
2788 }
2789
2790 config_group_init_type_name(&se_dev->se_dev_group, name,
2791 &target_core_dev_cit);
2792 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2793 &target_core_dev_attrib_cit);
2794 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2795 &target_core_dev_pr_cit);
2796 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2797 &target_core_dev_wwn_cit);
2798 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2799 "alua", &target_core_alua_tg_pt_gps_cit);
2800 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2801 "statistics", &target_core_stat_cit);
2802
2803 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2804 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2805 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2806 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2807 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2808 dev_cg->default_groups[5] = NULL;
2809 /*
2810 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2811 */
2812 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2813 if (!tg_pt_gp)
2814 goto out;
2815
2816 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2817 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2818 GFP_KERNEL);
2819 if (!tg_pt_gp_cg->default_groups) {
2820 pr_err("Unable to allocate tg_pt_gp_cg->"
2821 "default_groups\n");
2822 goto out;
2823 }
2824
2825 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2826 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2827 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2828 tg_pt_gp_cg->default_groups[1] = NULL;
2829 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2830 /*
2831 * Add core/$HBA/$DEV/statistics/ default groups
2832 */
2833 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2834 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2835 GFP_KERNEL);
2836 if (!dev_stat_grp->default_groups) {
2837 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2838 goto out;
2839 }
2840 target_stat_setup_dev_default_groups(se_dev);
2841
2842 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2843 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2844
2845 mutex_unlock(&hba->hba_access_mutex);
2846 return &se_dev->se_dev_group;
2847 out:
2848 if (se_dev->t10_alua.default_tg_pt_gp) {
2849 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2850 se_dev->t10_alua.default_tg_pt_gp = NULL;
2851 }
2852 if (dev_stat_grp)
2853 kfree(dev_stat_grp->default_groups);
2854 if (tg_pt_gp_cg)
2855 kfree(tg_pt_gp_cg->default_groups);
2856 if (dev_cg)
2857 kfree(dev_cg->default_groups);
2858 if (se_dev->se_dev_su_ptr)
2859 t->free_device(se_dev->se_dev_su_ptr);
2860 kfree(se_dev);
2861 unlock:
2862 mutex_unlock(&hba->hba_access_mutex);
2863 return ERR_PTR(errno);
2864 }
2865
2866 static void target_core_drop_subdev(
2867 struct config_group *group,
2868 struct config_item *item)
2869 {
2870 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2871 struct se_subsystem_dev, se_dev_group);
2872 struct se_hba *hba;
2873 struct config_item *df_item;
2874 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2875 int i;
2876
2877 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2878
2879 mutex_lock(&hba->hba_access_mutex);
2880
2881 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2882 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2883 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2884 dev_stat_grp->default_groups[i] = NULL;
2885 config_item_put(df_item);
2886 }
2887 kfree(dev_stat_grp->default_groups);
2888
2889 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2890 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2891 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2892 tg_pt_gp_cg->default_groups[i] = NULL;
2893 config_item_put(df_item);
2894 }
2895 kfree(tg_pt_gp_cg->default_groups);
2896 /*
2897 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2898 * directly from target_core_alua_tg_pt_gp_release().
2899 */
2900 se_dev->t10_alua.default_tg_pt_gp = NULL;
2901
2902 dev_cg = &se_dev->se_dev_group;
2903 for (i = 0; dev_cg->default_groups[i]; i++) {
2904 df_item = &dev_cg->default_groups[i]->cg_item;
2905 dev_cg->default_groups[i] = NULL;
2906 config_item_put(df_item);
2907 }
2908 /*
2909 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2910 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2911 */
2912 config_item_put(item);
2913 mutex_unlock(&hba->hba_access_mutex);
2914 }
2915
2916 static struct configfs_group_operations target_core_hba_group_ops = {
2917 .make_group = target_core_make_subdev,
2918 .drop_item = target_core_drop_subdev,
2919 };
2920
2921 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2922 #define SE_HBA_ATTR(_name, _mode) \
2923 static struct target_core_hba_attribute \
2924 target_core_hba_##_name = \
2925 __CONFIGFS_EATTR(_name, _mode, \
2926 target_core_hba_show_attr_##_name, \
2927 target_core_hba_store_attr_##_name);
2928
2929 #define SE_HBA_ATTR_RO(_name) \
2930 static struct target_core_hba_attribute \
2931 target_core_hba_##_name = \
2932 __CONFIGFS_EATTR_RO(_name, \
2933 target_core_hba_show_attr_##_name);
2934
2935 static ssize_t target_core_hba_show_attr_hba_info(
2936 struct se_hba *hba,
2937 char *page)
2938 {
2939 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2940 hba->hba_id, hba->transport->name,
2941 TARGET_CORE_CONFIGFS_VERSION);
2942 }
2943
2944 SE_HBA_ATTR_RO(hba_info);
2945
2946 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2947 char *page)
2948 {
2949 int hba_mode = 0;
2950
2951 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2952 hba_mode = 1;
2953
2954 return sprintf(page, "%d\n", hba_mode);
2955 }
2956
2957 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2958 const char *page, size_t count)
2959 {
2960 struct se_subsystem_api *transport = hba->transport;
2961 unsigned long mode_flag;
2962 int ret;
2963
2964 if (transport->pmode_enable_hba == NULL)
2965 return -EINVAL;
2966
2967 ret = strict_strtoul(page, 0, &mode_flag);
2968 if (ret < 0) {
2969 pr_err("Unable to extract hba mode flag: %d\n", ret);
2970 return -EINVAL;
2971 }
2972
2973 spin_lock(&hba->device_lock);
2974 if (!list_empty(&hba->hba_dev_list)) {
2975 pr_err("Unable to set hba_mode with active devices\n");
2976 spin_unlock(&hba->device_lock);
2977 return -EINVAL;
2978 }
2979 spin_unlock(&hba->device_lock);
2980
2981 ret = transport->pmode_enable_hba(hba, mode_flag);
2982 if (ret < 0)
2983 return -EINVAL;
2984 if (ret > 0)
2985 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2986 else if (ret == 0)
2987 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2988
2989 return count;
2990 }
2991
2992 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2993
2994 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2995
2996 static void target_core_hba_release(struct config_item *item)
2997 {
2998 struct se_hba *hba = container_of(to_config_group(item),
2999 struct se_hba, hba_group);
3000 core_delete_hba(hba);
3001 }
3002
3003 static struct configfs_attribute *target_core_hba_attrs[] = {
3004 &target_core_hba_hba_info.attr,
3005 &target_core_hba_hba_mode.attr,
3006 NULL,
3007 };
3008
3009 static struct configfs_item_operations target_core_hba_item_ops = {
3010 .release = target_core_hba_release,
3011 .show_attribute = target_core_hba_attr_show,
3012 .store_attribute = target_core_hba_attr_store,
3013 };
3014
3015 static struct config_item_type target_core_hba_cit = {
3016 .ct_item_ops = &target_core_hba_item_ops,
3017 .ct_group_ops = &target_core_hba_group_ops,
3018 .ct_attrs = target_core_hba_attrs,
3019 .ct_owner = THIS_MODULE,
3020 };
3021
3022 static struct config_group *target_core_call_addhbatotarget(
3023 struct config_group *group,
3024 const char *name)
3025 {
3026 char *se_plugin_str, *str, *str2;
3027 struct se_hba *hba;
3028 char buf[TARGET_CORE_NAME_MAX_LEN];
3029 unsigned long plugin_dep_id = 0;
3030 int ret;
3031
3032 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3033 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3034 pr_err("Passed *name strlen(): %d exceeds"
3035 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3036 TARGET_CORE_NAME_MAX_LEN);
3037 return ERR_PTR(-ENAMETOOLONG);
3038 }
3039 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3040
3041 str = strstr(buf, "_");
3042 if (!str) {
3043 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3044 return ERR_PTR(-EINVAL);
3045 }
3046 se_plugin_str = buf;
3047 /*
3048 * Special case for subsystem plugins that have "_" in their names.
3049 * Namely rd_direct and rd_mcp..
3050 */
3051 str2 = strstr(str+1, "_");
3052 if (str2) {
3053 *str2 = '\0'; /* Terminate for *se_plugin_str */
3054 str2++; /* Skip to start of plugin dependent ID */
3055 str = str2;
3056 } else {
3057 *str = '\0'; /* Terminate for *se_plugin_str */
3058 str++; /* Skip to start of plugin dependent ID */
3059 }
3060
3061 ret = strict_strtoul(str, 0, &plugin_dep_id);
3062 if (ret < 0) {
3063 pr_err("strict_strtoul() returned %d for"
3064 " plugin_dep_id\n", ret);
3065 return ERR_PTR(-EINVAL);
3066 }
3067 /*
3068 * Load up TCM subsystem plugins if they have not already been loaded.
3069 */
3070 transport_subsystem_check_init();
3071
3072 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3073 if (IS_ERR(hba))
3074 return ERR_CAST(hba);
3075
3076 config_group_init_type_name(&hba->hba_group, name,
3077 &target_core_hba_cit);
3078
3079 return &hba->hba_group;
3080 }
3081
3082 static void target_core_call_delhbafromtarget(
3083 struct config_group *group,
3084 struct config_item *item)
3085 {
3086 /*
3087 * core_delete_hba() is called from target_core_hba_item_ops->release()
3088 * -> target_core_hba_release()
3089 */
3090 config_item_put(item);
3091 }
3092
3093 static struct configfs_group_operations target_core_group_ops = {
3094 .make_group = target_core_call_addhbatotarget,
3095 .drop_item = target_core_call_delhbafromtarget,
3096 };
3097
3098 static struct config_item_type target_core_cit = {
3099 .ct_item_ops = NULL,
3100 .ct_group_ops = &target_core_group_ops,
3101 .ct_attrs = NULL,
3102 .ct_owner = THIS_MODULE,
3103 };
3104
3105 /* Stop functions for struct config_item_type target_core_hba_cit */
3106
3107 static int __init target_core_init_configfs(void)
3108 {
3109 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3110 struct config_group *lu_gp_cg = NULL;
3111 struct configfs_subsystem *subsys;
3112 struct t10_alua_lu_gp *lu_gp;
3113 int ret;
3114
3115 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3116 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3117 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3118
3119 subsys = target_core_subsystem[0];
3120 config_group_init(&subsys->su_group);
3121 mutex_init(&subsys->su_mutex);
3122
3123 ret = init_se_kmem_caches();
3124 if (ret < 0)
3125 return ret;
3126 /*
3127 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3128 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3129 */
3130 target_cg = &subsys->su_group;
3131 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3132 GFP_KERNEL);
3133 if (!target_cg->default_groups) {
3134 pr_err("Unable to allocate target_cg->default_groups\n");
3135 goto out_global;
3136 }
3137
3138 config_group_init_type_name(&target_core_hbagroup,
3139 "core", &target_core_cit);
3140 target_cg->default_groups[0] = &target_core_hbagroup;
3141 target_cg->default_groups[1] = NULL;
3142 /*
3143 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3144 */
3145 hba_cg = &target_core_hbagroup;
3146 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3147 GFP_KERNEL);
3148 if (!hba_cg->default_groups) {
3149 pr_err("Unable to allocate hba_cg->default_groups\n");
3150 goto out_global;
3151 }
3152 config_group_init_type_name(&alua_group,
3153 "alua", &target_core_alua_cit);
3154 hba_cg->default_groups[0] = &alua_group;
3155 hba_cg->default_groups[1] = NULL;
3156 /*
3157 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3158 * groups under /sys/kernel/config/target/core/alua/
3159 */
3160 alua_cg = &alua_group;
3161 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3162 GFP_KERNEL);
3163 if (!alua_cg->default_groups) {
3164 pr_err("Unable to allocate alua_cg->default_groups\n");
3165 goto out_global;
3166 }
3167
3168 config_group_init_type_name(&alua_lu_gps_group,
3169 "lu_gps", &target_core_alua_lu_gps_cit);
3170 alua_cg->default_groups[0] = &alua_lu_gps_group;
3171 alua_cg->default_groups[1] = NULL;
3172 /*
3173 * Add core/alua/lu_gps/default_lu_gp
3174 */
3175 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3176 if (IS_ERR(lu_gp))
3177 goto out_global;
3178
3179 lu_gp_cg = &alua_lu_gps_group;
3180 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3181 GFP_KERNEL);
3182 if (!lu_gp_cg->default_groups) {
3183 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3184 goto out_global;
3185 }
3186
3187 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3188 &target_core_alua_lu_gp_cit);
3189 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3190 lu_gp_cg->default_groups[1] = NULL;
3191 default_lu_gp = lu_gp;
3192 /*
3193 * Register the target_core_mod subsystem with configfs.
3194 */
3195 ret = configfs_register_subsystem(subsys);
3196 if (ret < 0) {
3197 pr_err("Error %d while registering subsystem %s\n",
3198 ret, subsys->su_group.cg_item.ci_namebuf);
3199 goto out_global;
3200 }
3201 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3202 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3203 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3204 /*
3205 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3206 */
3207 ret = rd_module_init();
3208 if (ret < 0)
3209 goto out;
3210
3211 if (core_dev_setup_virtual_lun0() < 0)
3212 goto out;
3213
3214 return 0;
3215
3216 out:
3217 configfs_unregister_subsystem(subsys);
3218 core_dev_release_virtual_lun0();
3219 rd_module_exit();
3220 out_global:
3221 if (default_lu_gp) {
3222 core_alua_free_lu_gp(default_lu_gp);
3223 default_lu_gp = NULL;
3224 }
3225 if (lu_gp_cg)
3226 kfree(lu_gp_cg->default_groups);
3227 if (alua_cg)
3228 kfree(alua_cg->default_groups);
3229 if (hba_cg)
3230 kfree(hba_cg->default_groups);
3231 kfree(target_cg->default_groups);
3232 release_se_kmem_caches();
3233 return ret;
3234 }
3235
3236 static void __exit target_core_exit_configfs(void)
3237 {
3238 struct configfs_subsystem *subsys;
3239 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3240 struct config_item *item;
3241 int i;
3242
3243 subsys = target_core_subsystem[0];
3244
3245 lu_gp_cg = &alua_lu_gps_group;
3246 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3247 item = &lu_gp_cg->default_groups[i]->cg_item;
3248 lu_gp_cg->default_groups[i] = NULL;
3249 config_item_put(item);
3250 }
3251 kfree(lu_gp_cg->default_groups);
3252 lu_gp_cg->default_groups = NULL;
3253
3254 alua_cg = &alua_group;
3255 for (i = 0; alua_cg->default_groups[i]; i++) {
3256 item = &alua_cg->default_groups[i]->cg_item;
3257 alua_cg->default_groups[i] = NULL;
3258 config_item_put(item);
3259 }
3260 kfree(alua_cg->default_groups);
3261 alua_cg->default_groups = NULL;
3262
3263 hba_cg = &target_core_hbagroup;
3264 for (i = 0; hba_cg->default_groups[i]; i++) {
3265 item = &hba_cg->default_groups[i]->cg_item;
3266 hba_cg->default_groups[i] = NULL;
3267 config_item_put(item);
3268 }
3269 kfree(hba_cg->default_groups);
3270 hba_cg->default_groups = NULL;
3271 /*
3272 * We expect subsys->su_group.default_groups to be released
3273 * by configfs subsystem provider logic..
3274 */
3275 configfs_unregister_subsystem(subsys);
3276 kfree(subsys->su_group.default_groups);
3277
3278 core_alua_free_lu_gp(default_lu_gp);
3279 default_lu_gp = NULL;
3280
3281 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3282 " Infrastructure\n");
3283
3284 core_dev_release_virtual_lun0();
3285 rd_module_exit();
3286 release_se_kmem_caches();
3287 }
3288
3289 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3290 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3291 MODULE_LICENSE("GPL");
3292
3293 module_init(target_core_init_configfs);
3294 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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