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block, cfq: misc updates to cfq_io_context
[linux-2.6.git] / drivers / target / target_core_configfs.c
blob93d4f6a1b7980c597c119ae7f7f0506d57846993
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_device.h>
43 #include <target/target_core_transport.h>
44 #include <target/target_core_fabric_ops.h>
45 #include <target/target_core_fabric_configfs.h>
46 #include <target/target_core_configfs.h>
47 #include <target/configfs_macros.h>
48
49 #include "target_core_alua.h"
50 #include "target_core_hba.h"
51 #include "target_core_pr.h"
52 #include "target_core_rd.h"
53 #include "target_core_stat.h"
54
55 extern struct t10_alua_lu_gp *default_lu_gp;
56
57 static struct list_head g_tf_list;
58 static struct mutex g_tf_lock;
59
60 struct target_core_configfs_attribute {
61 struct configfs_attribute attr;
62 ssize_t (*show)(void *, char *);
63 ssize_t (*store)(void *, const char *, size_t);
64 };
65
66 static struct config_group target_core_hbagroup;
67 static struct config_group alua_group;
68 static struct config_group alua_lu_gps_group;
69
70 static inline struct se_hba *
71 item_to_hba(struct config_item *item)
72 {
73 return container_of(to_config_group(item), struct se_hba, hba_group);
74 }
75
76 /*
77 * Attributes for /sys/kernel/config/target/
78 */
79 static ssize_t target_core_attr_show(struct config_item *item,
80 struct configfs_attribute *attr,
81 char *page)
82 {
83 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
84 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
85 utsname()->sysname, utsname()->machine);
86 }
87
88 static struct configfs_item_operations target_core_fabric_item_ops = {
89 .show_attribute = target_core_attr_show,
90 };
91
92 static struct configfs_attribute target_core_item_attr_version = {
93 .ca_owner = THIS_MODULE,
94 .ca_name = "version",
95 .ca_mode = S_IRUGO,
96 };
97
98 static struct target_fabric_configfs *target_core_get_fabric(
99 const char *name)
100 {
101 struct target_fabric_configfs *tf;
102
103 if (!name)
104 return NULL;
105
106 mutex_lock(&g_tf_lock);
107 list_for_each_entry(tf, &g_tf_list, tf_list) {
108 if (!strcmp(tf->tf_name, name)) {
109 atomic_inc(&tf->tf_access_cnt);
110 mutex_unlock(&g_tf_lock);
111 return tf;
112 }
113 }
114 mutex_unlock(&g_tf_lock);
115
116 return NULL;
117 }
118
119 /*
120 * Called from struct target_core_group_ops->make_group()
121 */
122 static struct config_group *target_core_register_fabric(
123 struct config_group *group,
124 const char *name)
125 {
126 struct target_fabric_configfs *tf;
127 int ret;
128
129 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
130 " %s\n", group, name);
131 /*
132 * Below are some hardcoded request_module() calls to automatically
133 * local fabric modules when the following is called:
134 *
135 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
136 *
137 * Note that this does not limit which TCM fabric module can be
138 * registered, but simply provids auto loading logic for modules with
139 * mkdir(2) system calls with known TCM fabric modules.
140 */
141 if (!strncmp(name, "iscsi", 5)) {
142 /*
143 * Automatically load the LIO Target fabric module when the
144 * following is called:
145 *
146 * mkdir -p $CONFIGFS/target/iscsi
147 */
148 ret = request_module("iscsi_target_mod");
149 if (ret < 0) {
150 pr_err("request_module() failed for"
151 " iscsi_target_mod.ko: %d\n", ret);
152 return ERR_PTR(-EINVAL);
153 }
154 } else if (!strncmp(name, "loopback", 8)) {
155 /*
156 * Automatically load the tcm_loop fabric module when the
157 * following is called:
158 *
159 * mkdir -p $CONFIGFS/target/loopback
160 */
161 ret = request_module("tcm_loop");
162 if (ret < 0) {
163 pr_err("request_module() failed for"
164 " tcm_loop.ko: %d\n", ret);
165 return ERR_PTR(-EINVAL);
166 }
167 }
168
169 tf = target_core_get_fabric(name);
170 if (!tf) {
171 pr_err("target_core_get_fabric() failed for %s\n",
172 name);
173 return ERR_PTR(-EINVAL);
174 }
175 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
176 " %s\n", tf->tf_name);
177 /*
178 * On a successful target_core_get_fabric() look, the returned
179 * struct target_fabric_configfs *tf will contain a usage reference.
180 */
181 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
182 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
183
184 tf->tf_group.default_groups = tf->tf_default_groups;
185 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
186 tf->tf_group.default_groups[1] = NULL;
187
188 config_group_init_type_name(&tf->tf_group, name,
189 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
190 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
191 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
192
193 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
194 " %s\n", tf->tf_group.cg_item.ci_name);
195 /*
196 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
197 */
198 tf->tf_ops.tf_subsys = tf->tf_subsys;
199 tf->tf_fabric = &tf->tf_group.cg_item;
200 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
201 " for %s\n", name);
202
203 return &tf->tf_group;
204 }
205
206 /*
207 * Called from struct target_core_group_ops->drop_item()
208 */
209 static void target_core_deregister_fabric(
210 struct config_group *group,
211 struct config_item *item)
212 {
213 struct target_fabric_configfs *tf = container_of(
214 to_config_group(item), struct target_fabric_configfs, tf_group);
215 struct config_group *tf_group;
216 struct config_item *df_item;
217 int i;
218
219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
220 " tf list\n", config_item_name(item));
221
222 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
223 " %s\n", tf->tf_name);
224 atomic_dec(&tf->tf_access_cnt);
225
226 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
227 " tf->tf_fabric for %s\n", tf->tf_name);
228 tf->tf_fabric = NULL;
229
230 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
231 " %s\n", config_item_name(item));
232
233 tf_group = &tf->tf_group;
234 for (i = 0; tf_group->default_groups[i]; i++) {
235 df_item = &tf_group->default_groups[i]->cg_item;
236 tf_group->default_groups[i] = NULL;
237 config_item_put(df_item);
238 }
239 config_item_put(item);
240 }
241
242 static struct configfs_group_operations target_core_fabric_group_ops = {
243 .make_group = &target_core_register_fabric,
244 .drop_item = &target_core_deregister_fabric,
245 };
246
247 /*
248 * All item attributes appearing in /sys/kernel/target/ appear here.
249 */
250 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
251 &target_core_item_attr_version,
252 NULL,
253 };
254
255 /*
256 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
257 */
258 static struct config_item_type target_core_fabrics_item = {
259 .ct_item_ops = &target_core_fabric_item_ops,
260 .ct_group_ops = &target_core_fabric_group_ops,
261 .ct_attrs = target_core_fabric_item_attrs,
262 .ct_owner = THIS_MODULE,
263 };
264
265 static struct configfs_subsystem target_core_fabrics = {
266 .su_group = {
267 .cg_item = {
268 .ci_namebuf = "target",
269 .ci_type = &target_core_fabrics_item,
270 },
271 },
272 };
273
274 static struct configfs_subsystem *target_core_subsystem[] = {
275 &target_core_fabrics,
276 NULL,
277 };
278
279 /*##############################################################################
280 // Start functions called by external Target Fabrics Modules
281 //############################################################################*/
282
283 /*
284 * First function called by fabric modules to:
285 *
286 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
287 * 2) Add struct target_fabric_configfs to g_tf_list
288 * 3) Return struct target_fabric_configfs to fabric module to be passed
289 * into target_fabric_configfs_register().
290 */
291 struct target_fabric_configfs *target_fabric_configfs_init(
292 struct module *fabric_mod,
293 const char *name)
294 {
295 struct target_fabric_configfs *tf;
296
297 if (!(name)) {
298 pr_err("Unable to locate passed fabric name\n");
299 return ERR_PTR(-EINVAL);
300 }
301 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
302 pr_err("Passed name: %s exceeds TARGET_FABRIC"
303 "_NAME_SIZE\n", name);
304 return ERR_PTR(-EINVAL);
305 }
306
307 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
308 if (!tf)
309 return ERR_PTR(-ENOMEM);
310
311 INIT_LIST_HEAD(&tf->tf_list);
312 atomic_set(&tf->tf_access_cnt, 0);
313 /*
314 * Setup the default generic struct config_item_type's (cits) in
315 * struct target_fabric_configfs->tf_cit_tmpl
316 */
317 tf->tf_module = fabric_mod;
318 target_fabric_setup_cits(tf);
319
320 tf->tf_subsys = target_core_subsystem[0];
321 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
322
323 mutex_lock(&g_tf_lock);
324 list_add_tail(&tf->tf_list, &g_tf_list);
325 mutex_unlock(&g_tf_lock);
326
327 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
328 ">>>>>>>>>>>>>>\n");
329 pr_debug("Initialized struct target_fabric_configfs: %p for"
330 " %s\n", tf, tf->tf_name);
331 return tf;
332 }
333 EXPORT_SYMBOL(target_fabric_configfs_init);
334
335 /*
336 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
337 */
338 void target_fabric_configfs_free(
339 struct target_fabric_configfs *tf)
340 {
341 mutex_lock(&g_tf_lock);
342 list_del(&tf->tf_list);
343 mutex_unlock(&g_tf_lock);
344
345 kfree(tf);
346 }
347 EXPORT_SYMBOL(target_fabric_configfs_free);
348
349 /*
350 * Perform a sanity check of the passed tf->tf_ops before completing
351 * TCM fabric module registration.
352 */
353 static int target_fabric_tf_ops_check(
354 struct target_fabric_configfs *tf)
355 {
356 struct target_core_fabric_ops *tfo = &tf->tf_ops;
357
358 if (!tfo->get_fabric_name) {
359 pr_err("Missing tfo->get_fabric_name()\n");
360 return -EINVAL;
361 }
362 if (!tfo->get_fabric_proto_ident) {
363 pr_err("Missing tfo->get_fabric_proto_ident()\n");
364 return -EINVAL;
365 }
366 if (!tfo->tpg_get_wwn) {
367 pr_err("Missing tfo->tpg_get_wwn()\n");
368 return -EINVAL;
369 }
370 if (!tfo->tpg_get_tag) {
371 pr_err("Missing tfo->tpg_get_tag()\n");
372 return -EINVAL;
373 }
374 if (!tfo->tpg_get_default_depth) {
375 pr_err("Missing tfo->tpg_get_default_depth()\n");
376 return -EINVAL;
377 }
378 if (!tfo->tpg_get_pr_transport_id) {
379 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
380 return -EINVAL;
381 }
382 if (!tfo->tpg_get_pr_transport_id_len) {
383 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
384 return -EINVAL;
385 }
386 if (!tfo->tpg_check_demo_mode) {
387 pr_err("Missing tfo->tpg_check_demo_mode()\n");
388 return -EINVAL;
389 }
390 if (!tfo->tpg_check_demo_mode_cache) {
391 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
392 return -EINVAL;
393 }
394 if (!tfo->tpg_check_demo_mode_write_protect) {
395 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
396 return -EINVAL;
397 }
398 if (!tfo->tpg_check_prod_mode_write_protect) {
399 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
400 return -EINVAL;
401 }
402 if (!tfo->tpg_alloc_fabric_acl) {
403 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
404 return -EINVAL;
405 }
406 if (!tfo->tpg_release_fabric_acl) {
407 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
408 return -EINVAL;
409 }
410 if (!tfo->tpg_get_inst_index) {
411 pr_err("Missing tfo->tpg_get_inst_index()\n");
412 return -EINVAL;
413 }
414 if (!tfo->release_cmd) {
415 pr_err("Missing tfo->release_cmd()\n");
416 return -EINVAL;
417 }
418 if (!tfo->shutdown_session) {
419 pr_err("Missing tfo->shutdown_session()\n");
420 return -EINVAL;
421 }
422 if (!tfo->close_session) {
423 pr_err("Missing tfo->close_session()\n");
424 return -EINVAL;
425 }
426 if (!tfo->stop_session) {
427 pr_err("Missing tfo->stop_session()\n");
428 return -EINVAL;
429 }
430 if (!tfo->fall_back_to_erl0) {
431 pr_err("Missing tfo->fall_back_to_erl0()\n");
432 return -EINVAL;
433 }
434 if (!tfo->sess_logged_in) {
435 pr_err("Missing tfo->sess_logged_in()\n");
436 return -EINVAL;
437 }
438 if (!tfo->sess_get_index) {
439 pr_err("Missing tfo->sess_get_index()\n");
440 return -EINVAL;
441 }
442 if (!tfo->write_pending) {
443 pr_err("Missing tfo->write_pending()\n");
444 return -EINVAL;
445 }
446 if (!tfo->write_pending_status) {
447 pr_err("Missing tfo->write_pending_status()\n");
448 return -EINVAL;
449 }
450 if (!tfo->set_default_node_attributes) {
451 pr_err("Missing tfo->set_default_node_attributes()\n");
452 return -EINVAL;
453 }
454 if (!tfo->get_task_tag) {
455 pr_err("Missing tfo->get_task_tag()\n");
456 return -EINVAL;
457 }
458 if (!tfo->get_cmd_state) {
459 pr_err("Missing tfo->get_cmd_state()\n");
460 return -EINVAL;
461 }
462 if (!tfo->queue_data_in) {
463 pr_err("Missing tfo->queue_data_in()\n");
464 return -EINVAL;
465 }
466 if (!tfo->queue_status) {
467 pr_err("Missing tfo->queue_status()\n");
468 return -EINVAL;
469 }
470 if (!tfo->queue_tm_rsp) {
471 pr_err("Missing tfo->queue_tm_rsp()\n");
472 return -EINVAL;
473 }
474 if (!tfo->set_fabric_sense_len) {
475 pr_err("Missing tfo->set_fabric_sense_len()\n");
476 return -EINVAL;
477 }
478 if (!tfo->get_fabric_sense_len) {
479 pr_err("Missing tfo->get_fabric_sense_len()\n");
480 return -EINVAL;
481 }
482 if (!tfo->is_state_remove) {
483 pr_err("Missing tfo->is_state_remove()\n");
484 return -EINVAL;
485 }
486 /*
487 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
488 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
489 * target_core_fabric_configfs.c WWN+TPG group context code.
490 */
491 if (!tfo->fabric_make_wwn) {
492 pr_err("Missing tfo->fabric_make_wwn()\n");
493 return -EINVAL;
494 }
495 if (!tfo->fabric_drop_wwn) {
496 pr_err("Missing tfo->fabric_drop_wwn()\n");
497 return -EINVAL;
498 }
499 if (!tfo->fabric_make_tpg) {
500 pr_err("Missing tfo->fabric_make_tpg()\n");
501 return -EINVAL;
502 }
503 if (!tfo->fabric_drop_tpg) {
504 pr_err("Missing tfo->fabric_drop_tpg()\n");
505 return -EINVAL;
506 }
507
508 return 0;
509 }
510
511 /*
512 * Called 2nd from fabric module with returned parameter of
513 * struct target_fabric_configfs * from target_fabric_configfs_init().
514 *
515 * Upon a successful registration, the new fabric's struct config_item is
516 * return. Also, a pointer to this struct is set in the passed
517 * struct target_fabric_configfs.
518 */
519 int target_fabric_configfs_register(
520 struct target_fabric_configfs *tf)
521 {
522 int ret;
523
524 if (!tf) {
525 pr_err("Unable to locate target_fabric_configfs"
526 " pointer\n");
527 return -EINVAL;
528 }
529 if (!tf->tf_subsys) {
530 pr_err("Unable to target struct config_subsystem"
531 " pointer\n");
532 return -EINVAL;
533 }
534 ret = target_fabric_tf_ops_check(tf);
535 if (ret < 0)
536 return ret;
537
538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
539 ">>>>>>>>>>\n");
540 return 0;
541 }
542 EXPORT_SYMBOL(target_fabric_configfs_register);
543
544 void target_fabric_configfs_deregister(
545 struct target_fabric_configfs *tf)
546 {
547 struct configfs_subsystem *su;
548
549 if (!tf) {
550 pr_err("Unable to locate passed target_fabric_"
551 "configfs\n");
552 return;
553 }
554 su = tf->tf_subsys;
555 if (!su) {
556 pr_err("Unable to locate passed tf->tf_subsys"
557 " pointer\n");
558 return;
559 }
560 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
561 ">>>>>>>>>>>>\n");
562 mutex_lock(&g_tf_lock);
563 if (atomic_read(&tf->tf_access_cnt)) {
564 mutex_unlock(&g_tf_lock);
565 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
566 tf->tf_name);
567 BUG();
568 }
569 list_del(&tf->tf_list);
570 mutex_unlock(&g_tf_lock);
571
572 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
573 " %s\n", tf->tf_name);
574 tf->tf_module = NULL;
575 tf->tf_subsys = NULL;
576 kfree(tf);
577
578 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
579 ">>>>>\n");
580 }
581 EXPORT_SYMBOL(target_fabric_configfs_deregister);
582
583 /*##############################################################################
584 // Stop functions called by external Target Fabrics Modules
585 //############################################################################*/
586
587 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
588
589 #define DEF_DEV_ATTRIB_SHOW(_name) \
590 static ssize_t target_core_dev_show_attr_##_name( \
591 struct se_dev_attrib *da, \
592 char *page) \
593 { \
594 struct se_device *dev; \
595 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
596 ssize_t rb; \
597 \
598 spin_lock(&se_dev->se_dev_lock); \
599 dev = se_dev->se_dev_ptr; \
600 if (!dev) { \
601 spin_unlock(&se_dev->se_dev_lock); \
602 return -ENODEV; \
603 } \
604 rb = snprintf(page, PAGE_SIZE, "%u\n", \
605 (u32)dev->se_sub_dev->se_dev_attrib._name); \
606 spin_unlock(&se_dev->se_dev_lock); \
607 \
608 return rb; \
609 }
610
611 #define DEF_DEV_ATTRIB_STORE(_name) \
612 static ssize_t target_core_dev_store_attr_##_name( \
613 struct se_dev_attrib *da, \
614 const char *page, \
615 size_t count) \
616 { \
617 struct se_device *dev; \
618 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
619 unsigned long val; \
620 int ret; \
621 \
622 spin_lock(&se_dev->se_dev_lock); \
623 dev = se_dev->se_dev_ptr; \
624 if (!dev) { \
625 spin_unlock(&se_dev->se_dev_lock); \
626 return -ENODEV; \
627 } \
628 ret = strict_strtoul(page, 0, &val); \
629 if (ret < 0) { \
630 spin_unlock(&se_dev->se_dev_lock); \
631 pr_err("strict_strtoul() failed with" \
632 " ret: %d\n", ret); \
633 return -EINVAL; \
634 } \
635 ret = se_dev_set_##_name(dev, (u32)val); \
636 spin_unlock(&se_dev->se_dev_lock); \
637 \
638 return (!ret) ? count : -EINVAL; \
639 }
640
641 #define DEF_DEV_ATTRIB(_name) \
642 DEF_DEV_ATTRIB_SHOW(_name); \
643 DEF_DEV_ATTRIB_STORE(_name);
644
645 #define DEF_DEV_ATTRIB_RO(_name) \
646 DEF_DEV_ATTRIB_SHOW(_name);
647
648 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
649 #define SE_DEV_ATTR(_name, _mode) \
650 static struct target_core_dev_attrib_attribute \
651 target_core_dev_attrib_##_name = \
652 __CONFIGFS_EATTR(_name, _mode, \
653 target_core_dev_show_attr_##_name, \
654 target_core_dev_store_attr_##_name);
655
656 #define SE_DEV_ATTR_RO(_name); \
657 static struct target_core_dev_attrib_attribute \
658 target_core_dev_attrib_##_name = \
659 __CONFIGFS_EATTR_RO(_name, \
660 target_core_dev_show_attr_##_name);
661
662 DEF_DEV_ATTRIB(emulate_dpo);
663 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
664
665 DEF_DEV_ATTRIB(emulate_fua_write);
666 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
667
668 DEF_DEV_ATTRIB(emulate_fua_read);
669 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
670
671 DEF_DEV_ATTRIB(emulate_write_cache);
672 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
673
674 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
675 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
676
677 DEF_DEV_ATTRIB(emulate_tas);
678 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
679
680 DEF_DEV_ATTRIB(emulate_tpu);
681 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
682
683 DEF_DEV_ATTRIB(emulate_tpws);
684 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
685
686 DEF_DEV_ATTRIB(enforce_pr_isids);
687 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
688
689 DEF_DEV_ATTRIB(is_nonrot);
690 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
691
692 DEF_DEV_ATTRIB(emulate_rest_reord);
693 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
694
695 DEF_DEV_ATTRIB_RO(hw_block_size);
696 SE_DEV_ATTR_RO(hw_block_size);
697
698 DEF_DEV_ATTRIB(block_size);
699 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
700
701 DEF_DEV_ATTRIB_RO(hw_max_sectors);
702 SE_DEV_ATTR_RO(hw_max_sectors);
703
704 DEF_DEV_ATTRIB(max_sectors);
705 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
706
707 DEF_DEV_ATTRIB(optimal_sectors);
708 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
709
710 DEF_DEV_ATTRIB_RO(hw_queue_depth);
711 SE_DEV_ATTR_RO(hw_queue_depth);
712
713 DEF_DEV_ATTRIB(queue_depth);
714 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
715
716 DEF_DEV_ATTRIB(max_unmap_lba_count);
717 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
718
719 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
720 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
721
722 DEF_DEV_ATTRIB(unmap_granularity);
723 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
724
725 DEF_DEV_ATTRIB(unmap_granularity_alignment);
726 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
727
728 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
729
730 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
731 &target_core_dev_attrib_emulate_dpo.attr,
732 &target_core_dev_attrib_emulate_fua_write.attr,
733 &target_core_dev_attrib_emulate_fua_read.attr,
734 &target_core_dev_attrib_emulate_write_cache.attr,
735 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
736 &target_core_dev_attrib_emulate_tas.attr,
737 &target_core_dev_attrib_emulate_tpu.attr,
738 &target_core_dev_attrib_emulate_tpws.attr,
739 &target_core_dev_attrib_enforce_pr_isids.attr,
740 &target_core_dev_attrib_is_nonrot.attr,
741 &target_core_dev_attrib_emulate_rest_reord.attr,
742 &target_core_dev_attrib_hw_block_size.attr,
743 &target_core_dev_attrib_block_size.attr,
744 &target_core_dev_attrib_hw_max_sectors.attr,
745 &target_core_dev_attrib_max_sectors.attr,
746 &target_core_dev_attrib_optimal_sectors.attr,
747 &target_core_dev_attrib_hw_queue_depth.attr,
748 &target_core_dev_attrib_queue_depth.attr,
749 &target_core_dev_attrib_max_unmap_lba_count.attr,
750 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
751 &target_core_dev_attrib_unmap_granularity.attr,
752 &target_core_dev_attrib_unmap_granularity_alignment.attr,
753 NULL,
754 };
755
756 static struct configfs_item_operations target_core_dev_attrib_ops = {
757 .show_attribute = target_core_dev_attrib_attr_show,
758 .store_attribute = target_core_dev_attrib_attr_store,
759 };
760
761 static struct config_item_type target_core_dev_attrib_cit = {
762 .ct_item_ops = &target_core_dev_attrib_ops,
763 .ct_attrs = target_core_dev_attrib_attrs,
764 .ct_owner = THIS_MODULE,
765 };
766
767 /* End functions for struct config_item_type target_core_dev_attrib_cit */
768
769 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
770
771 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
772 #define SE_DEV_WWN_ATTR(_name, _mode) \
773 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
774 __CONFIGFS_EATTR(_name, _mode, \
775 target_core_dev_wwn_show_attr_##_name, \
776 target_core_dev_wwn_store_attr_##_name);
777
778 #define SE_DEV_WWN_ATTR_RO(_name); \
779 do { \
780 static struct target_core_dev_wwn_attribute \
781 target_core_dev_wwn_##_name = \
782 __CONFIGFS_EATTR_RO(_name, \
783 target_core_dev_wwn_show_attr_##_name); \
784 } while (0);
785
786 /*
787 * VPD page 0x80 Unit serial
788 */
789 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
790 struct t10_wwn *t10_wwn,
791 char *page)
792 {
793 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
794 struct se_device *dev;
795
796 dev = se_dev->se_dev_ptr;
797 if (!dev)
798 return -ENODEV;
799
800 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
801 &t10_wwn->unit_serial[0]);
802 }
803
804 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
805 struct t10_wwn *t10_wwn,
806 const char *page,
807 size_t count)
808 {
809 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
810 struct se_device *dev;
811 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
812
813 /*
814 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
815 * from the struct scsi_device level firmware, do not allow
816 * VPD Unit Serial to be emulated.
817 *
818 * Note this struct scsi_device could also be emulating VPD
819 * information from its drivers/scsi LLD. But for now we assume
820 * it is doing 'the right thing' wrt a world wide unique
821 * VPD Unit Serial Number that OS dependent multipath can depend on.
822 */
823 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
824 pr_err("Underlying SCSI device firmware provided VPD"
825 " Unit Serial, ignoring request\n");
826 return -EOPNOTSUPP;
827 }
828
829 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
830 pr_err("Emulated VPD Unit Serial exceeds"
831 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
832 return -EOVERFLOW;
833 }
834 /*
835 * Check to see if any active $FABRIC_MOD exports exist. If they
836 * do exist, fail here as changing this information on the fly
837 * (underneath the initiator side OS dependent multipath code)
838 * could cause negative effects.
839 */
840 dev = su_dev->se_dev_ptr;
841 if (dev) {
842 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
843 pr_err("Unable to set VPD Unit Serial while"
844 " active %d $FABRIC_MOD exports exist\n",
845 atomic_read(&dev->dev_export_obj.obj_access_count));
846 return -EINVAL;
847 }
848 }
849 /*
850 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
851 *
852 * Also, strip any newline added from the userspace
853 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
854 */
855 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
856 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
857 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
858 "%s", strstrip(buf));
859 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
860
861 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
862 " %s\n", su_dev->t10_wwn.unit_serial);
863
864 return count;
865 }
866
867 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
868
869 /*
870 * VPD page 0x83 Protocol Identifier
871 */
872 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
873 struct t10_wwn *t10_wwn,
874 char *page)
875 {
876 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
877 struct se_device *dev;
878 struct t10_vpd *vpd;
879 unsigned char buf[VPD_TMP_BUF_SIZE];
880 ssize_t len = 0;
881
882 dev = se_dev->se_dev_ptr;
883 if (!dev)
884 return -ENODEV;
885
886 memset(buf, 0, VPD_TMP_BUF_SIZE);
887
888 spin_lock(&t10_wwn->t10_vpd_lock);
889 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
890 if (!vpd->protocol_identifier_set)
891 continue;
892
893 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
894
895 if (len + strlen(buf) >= PAGE_SIZE)
896 break;
897
898 len += sprintf(page+len, "%s", buf);
899 }
900 spin_unlock(&t10_wwn->t10_vpd_lock);
901
902 return len;
903 }
904
905 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
906 struct t10_wwn *t10_wwn,
907 const char *page,
908 size_t count)
909 {
910 return -ENOSYS;
911 }
912
913 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
914
915 /*
916 * Generic wrapper for dumping VPD identifiers by association.
917 */
918 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
919 static ssize_t target_core_dev_wwn_show_attr_##_name( \
920 struct t10_wwn *t10_wwn, \
921 char *page) \
922 { \
923 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
924 struct se_device *dev; \
925 struct t10_vpd *vpd; \
926 unsigned char buf[VPD_TMP_BUF_SIZE]; \
927 ssize_t len = 0; \
928 \
929 dev = se_dev->se_dev_ptr; \
930 if (!dev) \
931 return -ENODEV; \
932 \
933 spin_lock(&t10_wwn->t10_vpd_lock); \
934 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
935 if (vpd->association != _assoc) \
936 continue; \
937 \
938 memset(buf, 0, VPD_TMP_BUF_SIZE); \
939 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
940 if (len + strlen(buf) >= PAGE_SIZE) \
941 break; \
942 len += sprintf(page+len, "%s", buf); \
943 \
944 memset(buf, 0, VPD_TMP_BUF_SIZE); \
945 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
946 if (len + strlen(buf) >= PAGE_SIZE) \
947 break; \
948 len += sprintf(page+len, "%s", buf); \
949 \
950 memset(buf, 0, VPD_TMP_BUF_SIZE); \
951 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
952 if (len + strlen(buf) >= PAGE_SIZE) \
953 break; \
954 len += sprintf(page+len, "%s", buf); \
955 } \
956 spin_unlock(&t10_wwn->t10_vpd_lock); \
957 \
958 return len; \
959 }
960
961 /*
962 * VPD page 0x83 Association: Logical Unit
963 */
964 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
965
966 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
967 struct t10_wwn *t10_wwn,
968 const char *page,
969 size_t count)
970 {
971 return -ENOSYS;
972 }
973
974 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
975
976 /*
977 * VPD page 0x83 Association: Target Port
978 */
979 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
980
981 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
982 struct t10_wwn *t10_wwn,
983 const char *page,
984 size_t count)
985 {
986 return -ENOSYS;
987 }
988
989 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
990
991 /*
992 * VPD page 0x83 Association: SCSI Target Device
993 */
994 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
995
996 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
997 struct t10_wwn *t10_wwn,
998 const char *page,
999 size_t count)
1000 {
1001 return -ENOSYS;
1002 }
1003
1004 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1005
1006 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1007
1008 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1009 &target_core_dev_wwn_vpd_unit_serial.attr,
1010 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1011 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1012 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1013 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1014 NULL,
1015 };
1016
1017 static struct configfs_item_operations target_core_dev_wwn_ops = {
1018 .show_attribute = target_core_dev_wwn_attr_show,
1019 .store_attribute = target_core_dev_wwn_attr_store,
1020 };
1021
1022 static struct config_item_type target_core_dev_wwn_cit = {
1023 .ct_item_ops = &target_core_dev_wwn_ops,
1024 .ct_attrs = target_core_dev_wwn_attrs,
1025 .ct_owner = THIS_MODULE,
1026 };
1027
1028 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1029
1030 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1031
1032 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1033 #define SE_DEV_PR_ATTR(_name, _mode) \
1034 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1035 __CONFIGFS_EATTR(_name, _mode, \
1036 target_core_dev_pr_show_attr_##_name, \
1037 target_core_dev_pr_store_attr_##_name);
1038
1039 #define SE_DEV_PR_ATTR_RO(_name); \
1040 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1041 __CONFIGFS_EATTR_RO(_name, \
1042 target_core_dev_pr_show_attr_##_name);
1043
1044 /*
1045 * res_holder
1046 */
1047 static ssize_t target_core_dev_pr_show_spc3_res(
1048 struct se_device *dev,
1049 char *page,
1050 ssize_t *len)
1051 {
1052 struct se_node_acl *se_nacl;
1053 struct t10_pr_registration *pr_reg;
1054 char i_buf[PR_REG_ISID_ID_LEN];
1055 int prf_isid;
1056
1057 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1058
1059 spin_lock(&dev->dev_reservation_lock);
1060 pr_reg = dev->dev_pr_res_holder;
1061 if (!pr_reg) {
1062 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1063 spin_unlock(&dev->dev_reservation_lock);
1064 return *len;
1065 }
1066 se_nacl = pr_reg->pr_reg_nacl;
1067 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1068 PR_REG_ISID_ID_LEN);
1069
1070 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1071 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1072 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1073 spin_unlock(&dev->dev_reservation_lock);
1074
1075 return *len;
1076 }
1077
1078 static ssize_t target_core_dev_pr_show_spc2_res(
1079 struct se_device *dev,
1080 char *page,
1081 ssize_t *len)
1082 {
1083 struct se_node_acl *se_nacl;
1084
1085 spin_lock(&dev->dev_reservation_lock);
1086 se_nacl = dev->dev_reserved_node_acl;
1087 if (!se_nacl) {
1088 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1089 spin_unlock(&dev->dev_reservation_lock);
1090 return *len;
1091 }
1092 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1093 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1094 se_nacl->initiatorname);
1095 spin_unlock(&dev->dev_reservation_lock);
1096
1097 return *len;
1098 }
1099
1100 static ssize_t target_core_dev_pr_show_attr_res_holder(
1101 struct se_subsystem_dev *su_dev,
1102 char *page)
1103 {
1104 ssize_t len = 0;
1105
1106 if (!su_dev->se_dev_ptr)
1107 return -ENODEV;
1108
1109 switch (su_dev->t10_pr.res_type) {
1110 case SPC3_PERSISTENT_RESERVATIONS:
1111 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1112 page, &len);
1113 break;
1114 case SPC2_RESERVATIONS:
1115 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1116 page, &len);
1117 break;
1118 case SPC_PASSTHROUGH:
1119 len += sprintf(page+len, "Passthrough\n");
1120 break;
1121 default:
1122 len += sprintf(page+len, "Unknown\n");
1123 break;
1124 }
1125
1126 return len;
1127 }
1128
1129 SE_DEV_PR_ATTR_RO(res_holder);
1130
1131 /*
1132 * res_pr_all_tgt_pts
1133 */
1134 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1135 struct se_subsystem_dev *su_dev,
1136 char *page)
1137 {
1138 struct se_device *dev;
1139 struct t10_pr_registration *pr_reg;
1140 ssize_t len = 0;
1141
1142 dev = su_dev->se_dev_ptr;
1143 if (!dev)
1144 return -ENODEV;
1145
1146 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1147 return len;
1148
1149 spin_lock(&dev->dev_reservation_lock);
1150 pr_reg = dev->dev_pr_res_holder;
1151 if (!pr_reg) {
1152 len = sprintf(page, "No SPC-3 Reservation holder\n");
1153 spin_unlock(&dev->dev_reservation_lock);
1154 return len;
1155 }
1156 /*
1157 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1158 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1159 */
1160 if (pr_reg->pr_reg_all_tg_pt)
1161 len = sprintf(page, "SPC-3 Reservation: All Target"
1162 " Ports registration\n");
1163 else
1164 len = sprintf(page, "SPC-3 Reservation: Single"
1165 " Target Port registration\n");
1166 spin_unlock(&dev->dev_reservation_lock);
1167
1168 return len;
1169 }
1170
1171 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1172
1173 /*
1174 * res_pr_generation
1175 */
1176 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1177 struct se_subsystem_dev *su_dev,
1178 char *page)
1179 {
1180 if (!su_dev->se_dev_ptr)
1181 return -ENODEV;
1182
1183 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1184 return 0;
1185
1186 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1187 }
1188
1189 SE_DEV_PR_ATTR_RO(res_pr_generation);
1190
1191 /*
1192 * res_pr_holder_tg_port
1193 */
1194 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1195 struct se_subsystem_dev *su_dev,
1196 char *page)
1197 {
1198 struct se_device *dev;
1199 struct se_node_acl *se_nacl;
1200 struct se_lun *lun;
1201 struct se_portal_group *se_tpg;
1202 struct t10_pr_registration *pr_reg;
1203 struct target_core_fabric_ops *tfo;
1204 ssize_t len = 0;
1205
1206 dev = su_dev->se_dev_ptr;
1207 if (!dev)
1208 return -ENODEV;
1209
1210 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1211 return len;
1212
1213 spin_lock(&dev->dev_reservation_lock);
1214 pr_reg = dev->dev_pr_res_holder;
1215 if (!pr_reg) {
1216 len = sprintf(page, "No SPC-3 Reservation holder\n");
1217 spin_unlock(&dev->dev_reservation_lock);
1218 return len;
1219 }
1220 se_nacl = pr_reg->pr_reg_nacl;
1221 se_tpg = se_nacl->se_tpg;
1222 lun = pr_reg->pr_reg_tg_pt_lun;
1223 tfo = se_tpg->se_tpg_tfo;
1224
1225 len += sprintf(page+len, "SPC-3 Reservation: %s"
1226 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1227 tfo->tpg_get_wwn(se_tpg));
1228 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1229 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1230 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1231 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1232 tfo->get_fabric_name(), lun->unpacked_lun);
1233 spin_unlock(&dev->dev_reservation_lock);
1234
1235 return len;
1236 }
1237
1238 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1239
1240 /*
1241 * res_pr_registered_i_pts
1242 */
1243 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1244 struct se_subsystem_dev *su_dev,
1245 char *page)
1246 {
1247 struct target_core_fabric_ops *tfo;
1248 struct t10_pr_registration *pr_reg;
1249 unsigned char buf[384];
1250 char i_buf[PR_REG_ISID_ID_LEN];
1251 ssize_t len = 0;
1252 int reg_count = 0, prf_isid;
1253
1254 if (!su_dev->se_dev_ptr)
1255 return -ENODEV;
1256
1257 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1258 return len;
1259
1260 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1261
1262 spin_lock(&su_dev->t10_pr.registration_lock);
1263 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1264 pr_reg_list) {
1265
1266 memset(buf, 0, 384);
1267 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1268 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1269 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1270 PR_REG_ISID_ID_LEN);
1271 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1272 tfo->get_fabric_name(),
1273 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1274 &i_buf[0] : "", pr_reg->pr_res_key,
1275 pr_reg->pr_res_generation);
1276
1277 if (len + strlen(buf) >= PAGE_SIZE)
1278 break;
1279
1280 len += sprintf(page+len, "%s", buf);
1281 reg_count++;
1282 }
1283 spin_unlock(&su_dev->t10_pr.registration_lock);
1284
1285 if (!reg_count)
1286 len += sprintf(page+len, "None\n");
1287
1288 return len;
1289 }
1290
1291 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1292
1293 /*
1294 * res_pr_type
1295 */
1296 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1297 struct se_subsystem_dev *su_dev,
1298 char *page)
1299 {
1300 struct se_device *dev;
1301 struct t10_pr_registration *pr_reg;
1302 ssize_t len = 0;
1303
1304 dev = su_dev->se_dev_ptr;
1305 if (!dev)
1306 return -ENODEV;
1307
1308 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1309 return len;
1310
1311 spin_lock(&dev->dev_reservation_lock);
1312 pr_reg = dev->dev_pr_res_holder;
1313 if (!pr_reg) {
1314 len = sprintf(page, "No SPC-3 Reservation holder\n");
1315 spin_unlock(&dev->dev_reservation_lock);
1316 return len;
1317 }
1318 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1319 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1320 spin_unlock(&dev->dev_reservation_lock);
1321
1322 return len;
1323 }
1324
1325 SE_DEV_PR_ATTR_RO(res_pr_type);
1326
1327 /*
1328 * res_type
1329 */
1330 static ssize_t target_core_dev_pr_show_attr_res_type(
1331 struct se_subsystem_dev *su_dev,
1332 char *page)
1333 {
1334 ssize_t len = 0;
1335
1336 if (!su_dev->se_dev_ptr)
1337 return -ENODEV;
1338
1339 switch (su_dev->t10_pr.res_type) {
1340 case SPC3_PERSISTENT_RESERVATIONS:
1341 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1342 break;
1343 case SPC2_RESERVATIONS:
1344 len = sprintf(page, "SPC2_RESERVATIONS\n");
1345 break;
1346 case SPC_PASSTHROUGH:
1347 len = sprintf(page, "SPC_PASSTHROUGH\n");
1348 break;
1349 default:
1350 len = sprintf(page, "UNKNOWN\n");
1351 break;
1352 }
1353
1354 return len;
1355 }
1356
1357 SE_DEV_PR_ATTR_RO(res_type);
1358
1359 /*
1360 * res_aptpl_active
1361 */
1362
1363 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1364 struct se_subsystem_dev *su_dev,
1365 char *page)
1366 {
1367 if (!su_dev->se_dev_ptr)
1368 return -ENODEV;
1369
1370 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1371 return 0;
1372
1373 return sprintf(page, "APTPL Bit Status: %s\n",
1374 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1375 }
1376
1377 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1378
1379 /*
1380 * res_aptpl_metadata
1381 */
1382 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1383 struct se_subsystem_dev *su_dev,
1384 char *page)
1385 {
1386 if (!su_dev->se_dev_ptr)
1387 return -ENODEV;
1388
1389 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1390 return 0;
1391
1392 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1393 }
1394
1395 enum {
1396 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1397 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1398 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1399 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1400 };
1401
1402 static match_table_t tokens = {
1403 {Opt_initiator_fabric, "initiator_fabric=%s"},
1404 {Opt_initiator_node, "initiator_node=%s"},
1405 {Opt_initiator_sid, "initiator_sid=%s"},
1406 {Opt_sa_res_key, "sa_res_key=%s"},
1407 {Opt_res_holder, "res_holder=%d"},
1408 {Opt_res_type, "res_type=%d"},
1409 {Opt_res_scope, "res_scope=%d"},
1410 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1411 {Opt_mapped_lun, "mapped_lun=%d"},
1412 {Opt_target_fabric, "target_fabric=%s"},
1413 {Opt_target_node, "target_node=%s"},
1414 {Opt_tpgt, "tpgt=%d"},
1415 {Opt_port_rtpi, "port_rtpi=%d"},
1416 {Opt_target_lun, "target_lun=%d"},
1417 {Opt_err, NULL}
1418 };
1419
1420 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1421 struct se_subsystem_dev *su_dev,
1422 const char *page,
1423 size_t count)
1424 {
1425 struct se_device *dev;
1426 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1427 unsigned char *t_fabric = NULL, *t_port = NULL;
1428 char *orig, *ptr, *arg_p, *opts;
1429 substring_t args[MAX_OPT_ARGS];
1430 unsigned long long tmp_ll;
1431 u64 sa_res_key = 0;
1432 u32 mapped_lun = 0, target_lun = 0;
1433 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1434 u16 port_rpti = 0, tpgt = 0;
1435 u8 type = 0, scope;
1436
1437 dev = su_dev->se_dev_ptr;
1438 if (!dev)
1439 return -ENODEV;
1440
1441 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1442 return 0;
1443
1444 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1445 pr_debug("Unable to process APTPL metadata while"
1446 " active fabric exports exist\n");
1447 return -EINVAL;
1448 }
1449
1450 opts = kstrdup(page, GFP_KERNEL);
1451 if (!opts)
1452 return -ENOMEM;
1453
1454 orig = opts;
1455 while ((ptr = strsep(&opts, ",")) != NULL) {
1456 if (!*ptr)
1457 continue;
1458
1459 token = match_token(ptr, tokens, args);
1460 switch (token) {
1461 case Opt_initiator_fabric:
1462 i_fabric = match_strdup(&args[0]);
1463 if (!i_fabric) {
1464 ret = -ENOMEM;
1465 goto out;
1466 }
1467 break;
1468 case Opt_initiator_node:
1469 i_port = match_strdup(&args[0]);
1470 if (!i_port) {
1471 ret = -ENOMEM;
1472 goto out;
1473 }
1474 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1475 pr_err("APTPL metadata initiator_node="
1476 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1477 PR_APTPL_MAX_IPORT_LEN);
1478 ret = -EINVAL;
1479 break;
1480 }
1481 break;
1482 case Opt_initiator_sid:
1483 isid = match_strdup(&args[0]);
1484 if (!isid) {
1485 ret = -ENOMEM;
1486 goto out;
1487 }
1488 if (strlen(isid) >= PR_REG_ISID_LEN) {
1489 pr_err("APTPL metadata initiator_isid"
1490 "= exceeds PR_REG_ISID_LEN: %d\n",
1491 PR_REG_ISID_LEN);
1492 ret = -EINVAL;
1493 break;
1494 }
1495 break;
1496 case Opt_sa_res_key:
1497 arg_p = match_strdup(&args[0]);
1498 if (!arg_p) {
1499 ret = -ENOMEM;
1500 goto out;
1501 }
1502 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1503 if (ret < 0) {
1504 pr_err("strict_strtoull() failed for"
1505 " sa_res_key=\n");
1506 goto out;
1507 }
1508 sa_res_key = (u64)tmp_ll;
1509 break;
1510 /*
1511 * PR APTPL Metadata for Reservation
1512 */
1513 case Opt_res_holder:
1514 match_int(args, &arg);
1515 res_holder = arg;
1516 break;
1517 case Opt_res_type:
1518 match_int(args, &arg);
1519 type = (u8)arg;
1520 break;
1521 case Opt_res_scope:
1522 match_int(args, &arg);
1523 scope = (u8)arg;
1524 break;
1525 case Opt_res_all_tg_pt:
1526 match_int(args, &arg);
1527 all_tg_pt = (int)arg;
1528 break;
1529 case Opt_mapped_lun:
1530 match_int(args, &arg);
1531 mapped_lun = (u32)arg;
1532 break;
1533 /*
1534 * PR APTPL Metadata for Target Port
1535 */
1536 case Opt_target_fabric:
1537 t_fabric = match_strdup(&args[0]);
1538 if (!t_fabric) {
1539 ret = -ENOMEM;
1540 goto out;
1541 }
1542 break;
1543 case Opt_target_node:
1544 t_port = match_strdup(&args[0]);
1545 if (!t_port) {
1546 ret = -ENOMEM;
1547 goto out;
1548 }
1549 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1550 pr_err("APTPL metadata target_node="
1551 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1552 PR_APTPL_MAX_TPORT_LEN);
1553 ret = -EINVAL;
1554 break;
1555 }
1556 break;
1557 case Opt_tpgt:
1558 match_int(args, &arg);
1559 tpgt = (u16)arg;
1560 break;
1561 case Opt_port_rtpi:
1562 match_int(args, &arg);
1563 port_rpti = (u16)arg;
1564 break;
1565 case Opt_target_lun:
1566 match_int(args, &arg);
1567 target_lun = (u32)arg;
1568 break;
1569 default:
1570 break;
1571 }
1572 }
1573
1574 if (!i_port || !t_port || !sa_res_key) {
1575 pr_err("Illegal parameters for APTPL registration\n");
1576 ret = -EINVAL;
1577 goto out;
1578 }
1579
1580 if (res_holder && !(type)) {
1581 pr_err("Illegal PR type: 0x%02x for reservation"
1582 " holder\n", type);
1583 ret = -EINVAL;
1584 goto out;
1585 }
1586
1587 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1588 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1589 res_holder, all_tg_pt, type);
1590 out:
1591 kfree(i_fabric);
1592 kfree(i_port);
1593 kfree(isid);
1594 kfree(t_fabric);
1595 kfree(t_port);
1596 kfree(orig);
1597 return (ret == 0) ? count : ret;
1598 }
1599
1600 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1601
1602 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1603
1604 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1605 &target_core_dev_pr_res_holder.attr,
1606 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1607 &target_core_dev_pr_res_pr_generation.attr,
1608 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1609 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1610 &target_core_dev_pr_res_pr_type.attr,
1611 &target_core_dev_pr_res_type.attr,
1612 &target_core_dev_pr_res_aptpl_active.attr,
1613 &target_core_dev_pr_res_aptpl_metadata.attr,
1614 NULL,
1615 };
1616
1617 static struct configfs_item_operations target_core_dev_pr_ops = {
1618 .show_attribute = target_core_dev_pr_attr_show,
1619 .store_attribute = target_core_dev_pr_attr_store,
1620 };
1621
1622 static struct config_item_type target_core_dev_pr_cit = {
1623 .ct_item_ops = &target_core_dev_pr_ops,
1624 .ct_attrs = target_core_dev_pr_attrs,
1625 .ct_owner = THIS_MODULE,
1626 };
1627
1628 /* End functions for struct config_item_type target_core_dev_pr_cit */
1629
1630 /* Start functions for struct config_item_type target_core_dev_cit */
1631
1632 static ssize_t target_core_show_dev_info(void *p, char *page)
1633 {
1634 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1635 struct se_hba *hba = se_dev->se_dev_hba;
1636 struct se_subsystem_api *t = hba->transport;
1637 int bl = 0;
1638 ssize_t read_bytes = 0;
1639
1640 if (!se_dev->se_dev_ptr)
1641 return -ENODEV;
1642
1643 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1644 read_bytes += bl;
1645 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1646 return read_bytes;
1647 }
1648
1649 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1650 .attr = { .ca_owner = THIS_MODULE,
1651 .ca_name = "info",
1652 .ca_mode = S_IRUGO },
1653 .show = target_core_show_dev_info,
1654 .store = NULL,
1655 };
1656
1657 static ssize_t target_core_store_dev_control(
1658 void *p,
1659 const char *page,
1660 size_t count)
1661 {
1662 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1663 struct se_hba *hba = se_dev->se_dev_hba;
1664 struct se_subsystem_api *t = hba->transport;
1665
1666 if (!se_dev->se_dev_su_ptr) {
1667 pr_err("Unable to locate struct se_subsystem_dev>se"
1668 "_dev_su_ptr\n");
1669 return -EINVAL;
1670 }
1671
1672 return t->set_configfs_dev_params(hba, se_dev, page, count);
1673 }
1674
1675 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1676 .attr = { .ca_owner = THIS_MODULE,
1677 .ca_name = "control",
1678 .ca_mode = S_IWUSR },
1679 .show = NULL,
1680 .store = target_core_store_dev_control,
1681 };
1682
1683 static ssize_t target_core_show_dev_alias(void *p, char *page)
1684 {
1685 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1686
1687 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1688 return 0;
1689
1690 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1691 }
1692
1693 static ssize_t target_core_store_dev_alias(
1694 void *p,
1695 const char *page,
1696 size_t count)
1697 {
1698 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1699 struct se_hba *hba = se_dev->se_dev_hba;
1700 ssize_t read_bytes;
1701
1702 if (count > (SE_DEV_ALIAS_LEN-1)) {
1703 pr_err("alias count: %d exceeds"
1704 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1705 SE_DEV_ALIAS_LEN-1);
1706 return -EINVAL;
1707 }
1708
1709 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1710 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1711 "%s", page);
1712
1713 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1714 config_item_name(&hba->hba_group.cg_item),
1715 config_item_name(&se_dev->se_dev_group.cg_item),
1716 se_dev->se_dev_alias);
1717
1718 return read_bytes;
1719 }
1720
1721 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1722 .attr = { .ca_owner = THIS_MODULE,
1723 .ca_name = "alias",
1724 .ca_mode = S_IRUGO | S_IWUSR },
1725 .show = target_core_show_dev_alias,
1726 .store = target_core_store_dev_alias,
1727 };
1728
1729 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1730 {
1731 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1732
1733 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1734 return 0;
1735
1736 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1737 }
1738
1739 static ssize_t target_core_store_dev_udev_path(
1740 void *p,
1741 const char *page,
1742 size_t count)
1743 {
1744 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1745 struct se_hba *hba = se_dev->se_dev_hba;
1746 ssize_t read_bytes;
1747
1748 if (count > (SE_UDEV_PATH_LEN-1)) {
1749 pr_err("udev_path count: %d exceeds"
1750 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1751 SE_UDEV_PATH_LEN-1);
1752 return -EINVAL;
1753 }
1754
1755 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1756 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1757 "%s", page);
1758
1759 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1760 config_item_name(&hba->hba_group.cg_item),
1761 config_item_name(&se_dev->se_dev_group.cg_item),
1762 se_dev->se_dev_udev_path);
1763
1764 return read_bytes;
1765 }
1766
1767 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1768 .attr = { .ca_owner = THIS_MODULE,
1769 .ca_name = "udev_path",
1770 .ca_mode = S_IRUGO | S_IWUSR },
1771 .show = target_core_show_dev_udev_path,
1772 .store = target_core_store_dev_udev_path,
1773 };
1774
1775 static ssize_t target_core_store_dev_enable(
1776 void *p,
1777 const char *page,
1778 size_t count)
1779 {
1780 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1781 struct se_device *dev;
1782 struct se_hba *hba = se_dev->se_dev_hba;
1783 struct se_subsystem_api *t = hba->transport;
1784 char *ptr;
1785
1786 ptr = strstr(page, "1");
1787 if (!ptr) {
1788 pr_err("For dev_enable ops, only valid value"
1789 " is \"1\"\n");
1790 return -EINVAL;
1791 }
1792 if (se_dev->se_dev_ptr) {
1793 pr_err("se_dev->se_dev_ptr already set for storage"
1794 " object\n");
1795 return -EEXIST;
1796 }
1797
1798 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1799 return -EINVAL;
1800
1801 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1802 if (IS_ERR(dev))
1803 return PTR_ERR(dev);
1804 else if (!dev)
1805 return -EINVAL;
1806
1807 se_dev->se_dev_ptr = dev;
1808 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1809 " %p\n", se_dev->se_dev_ptr);
1810
1811 return count;
1812 }
1813
1814 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1815 .attr = { .ca_owner = THIS_MODULE,
1816 .ca_name = "enable",
1817 .ca_mode = S_IWUSR },
1818 .show = NULL,
1819 .store = target_core_store_dev_enable,
1820 };
1821
1822 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1823 {
1824 struct se_device *dev;
1825 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1826 struct config_item *lu_ci;
1827 struct t10_alua_lu_gp *lu_gp;
1828 struct t10_alua_lu_gp_member *lu_gp_mem;
1829 ssize_t len = 0;
1830
1831 dev = su_dev->se_dev_ptr;
1832 if (!dev)
1833 return -ENODEV;
1834
1835 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1836 return len;
1837
1838 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1839 if (!lu_gp_mem) {
1840 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1841 " pointer\n");
1842 return -EINVAL;
1843 }
1844
1845 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1846 lu_gp = lu_gp_mem->lu_gp;
1847 if (lu_gp) {
1848 lu_ci = &lu_gp->lu_gp_group.cg_item;
1849 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1850 config_item_name(lu_ci), lu_gp->lu_gp_id);
1851 }
1852 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1853
1854 return len;
1855 }
1856
1857 static ssize_t target_core_store_alua_lu_gp(
1858 void *p,
1859 const char *page,
1860 size_t count)
1861 {
1862 struct se_device *dev;
1863 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1864 struct se_hba *hba = su_dev->se_dev_hba;
1865 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1866 struct t10_alua_lu_gp_member *lu_gp_mem;
1867 unsigned char buf[LU_GROUP_NAME_BUF];
1868 int move = 0;
1869
1870 dev = su_dev->se_dev_ptr;
1871 if (!dev)
1872 return -ENODEV;
1873
1874 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1875 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1876 config_item_name(&hba->hba_group.cg_item),
1877 config_item_name(&su_dev->se_dev_group.cg_item));
1878 return -EINVAL;
1879 }
1880 if (count > LU_GROUP_NAME_BUF) {
1881 pr_err("ALUA LU Group Alias too large!\n");
1882 return -EINVAL;
1883 }
1884 memset(buf, 0, LU_GROUP_NAME_BUF);
1885 memcpy(buf, page, count);
1886 /*
1887 * Any ALUA logical unit alias besides "NULL" means we will be
1888 * making a new group association.
1889 */
1890 if (strcmp(strstrip(buf), "NULL")) {
1891 /*
1892 * core_alua_get_lu_gp_by_name() will increment reference to
1893 * struct t10_alua_lu_gp. This reference is released with
1894 * core_alua_get_lu_gp_by_name below().
1895 */
1896 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1897 if (!lu_gp_new)
1898 return -ENODEV;
1899 }
1900 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1901 if (!lu_gp_mem) {
1902 if (lu_gp_new)
1903 core_alua_put_lu_gp_from_name(lu_gp_new);
1904 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1905 " pointer\n");
1906 return -EINVAL;
1907 }
1908
1909 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1910 lu_gp = lu_gp_mem->lu_gp;
1911 if (lu_gp) {
1912 /*
1913 * Clearing an existing lu_gp association, and replacing
1914 * with NULL
1915 */
1916 if (!lu_gp_new) {
1917 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1918 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1919 " %hu\n",
1920 config_item_name(&hba->hba_group.cg_item),
1921 config_item_name(&su_dev->se_dev_group.cg_item),
1922 config_item_name(&lu_gp->lu_gp_group.cg_item),
1923 lu_gp->lu_gp_id);
1924
1925 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1926 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1927
1928 return count;
1929 }
1930 /*
1931 * Removing existing association of lu_gp_mem with lu_gp
1932 */
1933 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1934 move = 1;
1935 }
1936 /*
1937 * Associate lu_gp_mem with lu_gp_new.
1938 */
1939 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1940 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1941
1942 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1943 " core/alua/lu_gps/%s, ID: %hu\n",
1944 (move) ? "Moving" : "Adding",
1945 config_item_name(&hba->hba_group.cg_item),
1946 config_item_name(&su_dev->se_dev_group.cg_item),
1947 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1948 lu_gp_new->lu_gp_id);
1949
1950 core_alua_put_lu_gp_from_name(lu_gp_new);
1951 return count;
1952 }
1953
1954 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1955 .attr = { .ca_owner = THIS_MODULE,
1956 .ca_name = "alua_lu_gp",
1957 .ca_mode = S_IRUGO | S_IWUSR },
1958 .show = target_core_show_alua_lu_gp,
1959 .store = target_core_store_alua_lu_gp,
1960 };
1961
1962 static struct configfs_attribute *lio_core_dev_attrs[] = {
1963 &target_core_attr_dev_info.attr,
1964 &target_core_attr_dev_control.attr,
1965 &target_core_attr_dev_alias.attr,
1966 &target_core_attr_dev_udev_path.attr,
1967 &target_core_attr_dev_enable.attr,
1968 &target_core_attr_dev_alua_lu_gp.attr,
1969 NULL,
1970 };
1971
1972 static void target_core_dev_release(struct config_item *item)
1973 {
1974 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1975 struct se_subsystem_dev, se_dev_group);
1976 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1977 struct se_subsystem_api *t = hba->transport;
1978 struct config_group *dev_cg = &se_dev->se_dev_group;
1979
1980 kfree(dev_cg->default_groups);
1981 /*
1982 * This pointer will set when the storage is enabled with:
1983 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1984 */
1985 if (se_dev->se_dev_ptr) {
1986 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1987 "virtual_device() for se_dev_ptr: %p\n",
1988 se_dev->se_dev_ptr);
1989
1990 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1991 } else {
1992 /*
1993 * Release struct se_subsystem_dev->se_dev_su_ptr..
1994 */
1995 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1996 "device() for se_dev_su_ptr: %p\n",
1997 se_dev->se_dev_su_ptr);
1998
1999 t->free_device(se_dev->se_dev_su_ptr);
2000 }
2001
2002 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2003 "_dev_t: %p\n", se_dev);
2004 kfree(se_dev);
2005 }
2006
2007 static ssize_t target_core_dev_show(struct config_item *item,
2008 struct configfs_attribute *attr,
2009 char *page)
2010 {
2011 struct se_subsystem_dev *se_dev = container_of(
2012 to_config_group(item), struct se_subsystem_dev,
2013 se_dev_group);
2014 struct target_core_configfs_attribute *tc_attr = container_of(
2015 attr, struct target_core_configfs_attribute, attr);
2016
2017 if (!tc_attr->show)
2018 return -EINVAL;
2019
2020 return tc_attr->show(se_dev, page);
2021 }
2022
2023 static ssize_t target_core_dev_store(struct config_item *item,
2024 struct configfs_attribute *attr,
2025 const char *page, size_t count)
2026 {
2027 struct se_subsystem_dev *se_dev = container_of(
2028 to_config_group(item), struct se_subsystem_dev,
2029 se_dev_group);
2030 struct target_core_configfs_attribute *tc_attr = container_of(
2031 attr, struct target_core_configfs_attribute, attr);
2032
2033 if (!tc_attr->store)
2034 return -EINVAL;
2035
2036 return tc_attr->store(se_dev, page, count);
2037 }
2038
2039 static struct configfs_item_operations target_core_dev_item_ops = {
2040 .release = target_core_dev_release,
2041 .show_attribute = target_core_dev_show,
2042 .store_attribute = target_core_dev_store,
2043 };
2044
2045 static struct config_item_type target_core_dev_cit = {
2046 .ct_item_ops = &target_core_dev_item_ops,
2047 .ct_attrs = lio_core_dev_attrs,
2048 .ct_owner = THIS_MODULE,
2049 };
2050
2051 /* End functions for struct config_item_type target_core_dev_cit */
2052
2053 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2054
2055 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2056 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2057 static struct target_core_alua_lu_gp_attribute \
2058 target_core_alua_lu_gp_##_name = \
2059 __CONFIGFS_EATTR(_name, _mode, \
2060 target_core_alua_lu_gp_show_attr_##_name, \
2061 target_core_alua_lu_gp_store_attr_##_name);
2062
2063 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2064 static struct target_core_alua_lu_gp_attribute \
2065 target_core_alua_lu_gp_##_name = \
2066 __CONFIGFS_EATTR_RO(_name, \
2067 target_core_alua_lu_gp_show_attr_##_name);
2068
2069 /*
2070 * lu_gp_id
2071 */
2072 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2073 struct t10_alua_lu_gp *lu_gp,
2074 char *page)
2075 {
2076 if (!lu_gp->lu_gp_valid_id)
2077 return 0;
2078
2079 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2080 }
2081
2082 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2083 struct t10_alua_lu_gp *lu_gp,
2084 const char *page,
2085 size_t count)
2086 {
2087 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2088 unsigned long lu_gp_id;
2089 int ret;
2090
2091 ret = strict_strtoul(page, 0, &lu_gp_id);
2092 if (ret < 0) {
2093 pr_err("strict_strtoul() returned %d for"
2094 " lu_gp_id\n", ret);
2095 return -EINVAL;
2096 }
2097 if (lu_gp_id > 0x0000ffff) {
2098 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2099 " 0x0000ffff\n", lu_gp_id);
2100 return -EINVAL;
2101 }
2102
2103 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2104 if (ret < 0)
2105 return -EINVAL;
2106
2107 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2108 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2109 config_item_name(&alua_lu_gp_cg->cg_item),
2110 lu_gp->lu_gp_id);
2111
2112 return count;
2113 }
2114
2115 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2116
2117 /*
2118 * members
2119 */
2120 static ssize_t target_core_alua_lu_gp_show_attr_members(
2121 struct t10_alua_lu_gp *lu_gp,
2122 char *page)
2123 {
2124 struct se_device *dev;
2125 struct se_hba *hba;
2126 struct se_subsystem_dev *su_dev;
2127 struct t10_alua_lu_gp_member *lu_gp_mem;
2128 ssize_t len = 0, cur_len;
2129 unsigned char buf[LU_GROUP_NAME_BUF];
2130
2131 memset(buf, 0, LU_GROUP_NAME_BUF);
2132
2133 spin_lock(&lu_gp->lu_gp_lock);
2134 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2135 dev = lu_gp_mem->lu_gp_mem_dev;
2136 su_dev = dev->se_sub_dev;
2137 hba = su_dev->se_dev_hba;
2138
2139 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2140 config_item_name(&hba->hba_group.cg_item),
2141 config_item_name(&su_dev->se_dev_group.cg_item));
2142 cur_len++; /* Extra byte for NULL terminator */
2143
2144 if ((cur_len + len) > PAGE_SIZE) {
2145 pr_warn("Ran out of lu_gp_show_attr"
2146 "_members buffer\n");
2147 break;
2148 }
2149 memcpy(page+len, buf, cur_len);
2150 len += cur_len;
2151 }
2152 spin_unlock(&lu_gp->lu_gp_lock);
2153
2154 return len;
2155 }
2156
2157 SE_DEV_ALUA_LU_ATTR_RO(members);
2158
2159 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2160
2161 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2162 &target_core_alua_lu_gp_lu_gp_id.attr,
2163 &target_core_alua_lu_gp_members.attr,
2164 NULL,
2165 };
2166
2167 static void target_core_alua_lu_gp_release(struct config_item *item)
2168 {
2169 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2170 struct t10_alua_lu_gp, lu_gp_group);
2171
2172 core_alua_free_lu_gp(lu_gp);
2173 }
2174
2175 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2176 .release = target_core_alua_lu_gp_release,
2177 .show_attribute = target_core_alua_lu_gp_attr_show,
2178 .store_attribute = target_core_alua_lu_gp_attr_store,
2179 };
2180
2181 static struct config_item_type target_core_alua_lu_gp_cit = {
2182 .ct_item_ops = &target_core_alua_lu_gp_ops,
2183 .ct_attrs = target_core_alua_lu_gp_attrs,
2184 .ct_owner = THIS_MODULE,
2185 };
2186
2187 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2188
2189 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2190
2191 static struct config_group *target_core_alua_create_lu_gp(
2192 struct config_group *group,
2193 const char *name)
2194 {
2195 struct t10_alua_lu_gp *lu_gp;
2196 struct config_group *alua_lu_gp_cg = NULL;
2197 struct config_item *alua_lu_gp_ci = NULL;
2198
2199 lu_gp = core_alua_allocate_lu_gp(name, 0);
2200 if (IS_ERR(lu_gp))
2201 return NULL;
2202
2203 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2204 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2205
2206 config_group_init_type_name(alua_lu_gp_cg, name,
2207 &target_core_alua_lu_gp_cit);
2208
2209 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2210 " Group: core/alua/lu_gps/%s\n",
2211 config_item_name(alua_lu_gp_ci));
2212
2213 return alua_lu_gp_cg;
2214
2215 }
2216
2217 static void target_core_alua_drop_lu_gp(
2218 struct config_group *group,
2219 struct config_item *item)
2220 {
2221 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2222 struct t10_alua_lu_gp, lu_gp_group);
2223
2224 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2225 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2226 config_item_name(item), lu_gp->lu_gp_id);
2227 /*
2228 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2229 * -> target_core_alua_lu_gp_release()
2230 */
2231 config_item_put(item);
2232 }
2233
2234 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2235 .make_group = &target_core_alua_create_lu_gp,
2236 .drop_item = &target_core_alua_drop_lu_gp,
2237 };
2238
2239 static struct config_item_type target_core_alua_lu_gps_cit = {
2240 .ct_item_ops = NULL,
2241 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2242 .ct_owner = THIS_MODULE,
2243 };
2244
2245 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2246
2247 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2248
2249 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2250 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2251 static struct target_core_alua_tg_pt_gp_attribute \
2252 target_core_alua_tg_pt_gp_##_name = \
2253 __CONFIGFS_EATTR(_name, _mode, \
2254 target_core_alua_tg_pt_gp_show_attr_##_name, \
2255 target_core_alua_tg_pt_gp_store_attr_##_name);
2256
2257 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2258 static struct target_core_alua_tg_pt_gp_attribute \
2259 target_core_alua_tg_pt_gp_##_name = \
2260 __CONFIGFS_EATTR_RO(_name, \
2261 target_core_alua_tg_pt_gp_show_attr_##_name);
2262
2263 /*
2264 * alua_access_state
2265 */
2266 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2267 struct t10_alua_tg_pt_gp *tg_pt_gp,
2268 char *page)
2269 {
2270 return sprintf(page, "%d\n",
2271 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2272 }
2273
2274 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2275 struct t10_alua_tg_pt_gp *tg_pt_gp,
2276 const char *page,
2277 size_t count)
2278 {
2279 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2280 unsigned long tmp;
2281 int new_state, ret;
2282
2283 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2284 pr_err("Unable to do implict ALUA on non valid"
2285 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2286 return -EINVAL;
2287 }
2288
2289 ret = strict_strtoul(page, 0, &tmp);
2290 if (ret < 0) {
2291 pr_err("Unable to extract new ALUA access state from"
2292 " %s\n", page);
2293 return -EINVAL;
2294 }
2295 new_state = (int)tmp;
2296
2297 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2298 pr_err("Unable to process implict configfs ALUA"
2299 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2300 return -EINVAL;
2301 }
2302
2303 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2304 NULL, NULL, new_state, 0);
2305 return (!ret) ? count : -EINVAL;
2306 }
2307
2308 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2309
2310 /*
2311 * alua_access_status
2312 */
2313 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2314 struct t10_alua_tg_pt_gp *tg_pt_gp,
2315 char *page)
2316 {
2317 return sprintf(page, "%s\n",
2318 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2319 }
2320
2321 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2322 struct t10_alua_tg_pt_gp *tg_pt_gp,
2323 const char *page,
2324 size_t count)
2325 {
2326 unsigned long tmp;
2327 int new_status, ret;
2328
2329 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2330 pr_err("Unable to do set ALUA access status on non"
2331 " valid tg_pt_gp ID: %hu\n",
2332 tg_pt_gp->tg_pt_gp_valid_id);
2333 return -EINVAL;
2334 }
2335
2336 ret = strict_strtoul(page, 0, &tmp);
2337 if (ret < 0) {
2338 pr_err("Unable to extract new ALUA access status"
2339 " from %s\n", page);
2340 return -EINVAL;
2341 }
2342 new_status = (int)tmp;
2343
2344 if ((new_status != ALUA_STATUS_NONE) &&
2345 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2346 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2347 pr_err("Illegal ALUA access status: 0x%02x\n",
2348 new_status);
2349 return -EINVAL;
2350 }
2351
2352 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2353 return count;
2354 }
2355
2356 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2357
2358 /*
2359 * alua_access_type
2360 */
2361 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2362 struct t10_alua_tg_pt_gp *tg_pt_gp,
2363 char *page)
2364 {
2365 return core_alua_show_access_type(tg_pt_gp, page);
2366 }
2367
2368 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2369 struct t10_alua_tg_pt_gp *tg_pt_gp,
2370 const char *page,
2371 size_t count)
2372 {
2373 return core_alua_store_access_type(tg_pt_gp, page, count);
2374 }
2375
2376 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2377
2378 /*
2379 * alua_write_metadata
2380 */
2381 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2382 struct t10_alua_tg_pt_gp *tg_pt_gp,
2383 char *page)
2384 {
2385 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2386 }
2387
2388 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2389 struct t10_alua_tg_pt_gp *tg_pt_gp,
2390 const char *page,
2391 size_t count)
2392 {
2393 unsigned long tmp;
2394 int ret;
2395
2396 ret = strict_strtoul(page, 0, &tmp);
2397 if (ret < 0) {
2398 pr_err("Unable to extract alua_write_metadata\n");
2399 return -EINVAL;
2400 }
2401
2402 if ((tmp != 0) && (tmp != 1)) {
2403 pr_err("Illegal value for alua_write_metadata:"
2404 " %lu\n", tmp);
2405 return -EINVAL;
2406 }
2407 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2408
2409 return count;
2410 }
2411
2412 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2413
2414
2415
2416 /*
2417 * nonop_delay_msecs
2418 */
2419 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2420 struct t10_alua_tg_pt_gp *tg_pt_gp,
2421 char *page)
2422 {
2423 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2424
2425 }
2426
2427 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2428 struct t10_alua_tg_pt_gp *tg_pt_gp,
2429 const char *page,
2430 size_t count)
2431 {
2432 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2433 }
2434
2435 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2436
2437 /*
2438 * trans_delay_msecs
2439 */
2440 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2441 struct t10_alua_tg_pt_gp *tg_pt_gp,
2442 char *page)
2443 {
2444 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2445 }
2446
2447 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2448 struct t10_alua_tg_pt_gp *tg_pt_gp,
2449 const char *page,
2450 size_t count)
2451 {
2452 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2453 }
2454
2455 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2456
2457 /*
2458 * preferred
2459 */
2460
2461 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2462 struct t10_alua_tg_pt_gp *tg_pt_gp,
2463 char *page)
2464 {
2465 return core_alua_show_preferred_bit(tg_pt_gp, page);
2466 }
2467
2468 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2469 struct t10_alua_tg_pt_gp *tg_pt_gp,
2470 const char *page,
2471 size_t count)
2472 {
2473 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2474 }
2475
2476 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2477
2478 /*
2479 * tg_pt_gp_id
2480 */
2481 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2482 struct t10_alua_tg_pt_gp *tg_pt_gp,
2483 char *page)
2484 {
2485 if (!tg_pt_gp->tg_pt_gp_valid_id)
2486 return 0;
2487
2488 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2489 }
2490
2491 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2492 struct t10_alua_tg_pt_gp *tg_pt_gp,
2493 const char *page,
2494 size_t count)
2495 {
2496 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2497 unsigned long tg_pt_gp_id;
2498 int ret;
2499
2500 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2501 if (ret < 0) {
2502 pr_err("strict_strtoul() returned %d for"
2503 " tg_pt_gp_id\n", ret);
2504 return -EINVAL;
2505 }
2506 if (tg_pt_gp_id > 0x0000ffff) {
2507 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2508 " 0x0000ffff\n", tg_pt_gp_id);
2509 return -EINVAL;
2510 }
2511
2512 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2513 if (ret < 0)
2514 return -EINVAL;
2515
2516 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2517 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2518 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2519 tg_pt_gp->tg_pt_gp_id);
2520
2521 return count;
2522 }
2523
2524 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2525
2526 /*
2527 * members
2528 */
2529 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2530 struct t10_alua_tg_pt_gp *tg_pt_gp,
2531 char *page)
2532 {
2533 struct se_port *port;
2534 struct se_portal_group *tpg;
2535 struct se_lun *lun;
2536 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2537 ssize_t len = 0, cur_len;
2538 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2539
2540 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2541
2542 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2543 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2544 tg_pt_gp_mem_list) {
2545 port = tg_pt_gp_mem->tg_pt;
2546 tpg = port->sep_tpg;
2547 lun = port->sep_lun;
2548
2549 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2550 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2551 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2552 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2553 config_item_name(&lun->lun_group.cg_item));
2554 cur_len++; /* Extra byte for NULL terminator */
2555
2556 if ((cur_len + len) > PAGE_SIZE) {
2557 pr_warn("Ran out of lu_gp_show_attr"
2558 "_members buffer\n");
2559 break;
2560 }
2561 memcpy(page+len, buf, cur_len);
2562 len += cur_len;
2563 }
2564 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2565
2566 return len;
2567 }
2568
2569 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2570
2571 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2572 tg_pt_gp_group);
2573
2574 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2575 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2576 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2577 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2578 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2579 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2580 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2581 &target_core_alua_tg_pt_gp_preferred.attr,
2582 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2583 &target_core_alua_tg_pt_gp_members.attr,
2584 NULL,
2585 };
2586
2587 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2588 {
2589 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2590 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2591
2592 core_alua_free_tg_pt_gp(tg_pt_gp);
2593 }
2594
2595 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2596 .release = target_core_alua_tg_pt_gp_release,
2597 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2598 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2599 };
2600
2601 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2602 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2603 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2604 .ct_owner = THIS_MODULE,
2605 };
2606
2607 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2608
2609 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2610
2611 static struct config_group *target_core_alua_create_tg_pt_gp(
2612 struct config_group *group,
2613 const char *name)
2614 {
2615 struct t10_alua *alua = container_of(group, struct t10_alua,
2616 alua_tg_pt_gps_group);
2617 struct t10_alua_tg_pt_gp *tg_pt_gp;
2618 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2619 struct config_group *alua_tg_pt_gp_cg = NULL;
2620 struct config_item *alua_tg_pt_gp_ci = NULL;
2621
2622 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2623 if (!tg_pt_gp)
2624 return NULL;
2625
2626 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2627 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2628
2629 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2630 &target_core_alua_tg_pt_gp_cit);
2631
2632 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2633 " Group: alua/tg_pt_gps/%s\n",
2634 config_item_name(alua_tg_pt_gp_ci));
2635
2636 return alua_tg_pt_gp_cg;
2637 }
2638
2639 static void target_core_alua_drop_tg_pt_gp(
2640 struct config_group *group,
2641 struct config_item *item)
2642 {
2643 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2644 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2645
2646 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2647 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2648 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2649 /*
2650 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2651 * -> target_core_alua_tg_pt_gp_release().
2652 */
2653 config_item_put(item);
2654 }
2655
2656 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2657 .make_group = &target_core_alua_create_tg_pt_gp,
2658 .drop_item = &target_core_alua_drop_tg_pt_gp,
2659 };
2660
2661 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2662 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2663 .ct_owner = THIS_MODULE,
2664 };
2665
2666 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2667
2668 /* Start functions for struct config_item_type target_core_alua_cit */
2669
2670 /*
2671 * target_core_alua_cit is a ConfigFS group that lives under
2672 * /sys/kernel/config/target/core/alua. There are default groups
2673 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2674 * target_core_alua_cit in target_core_init_configfs() below.
2675 */
2676 static struct config_item_type target_core_alua_cit = {
2677 .ct_item_ops = NULL,
2678 .ct_attrs = NULL,
2679 .ct_owner = THIS_MODULE,
2680 };
2681
2682 /* End functions for struct config_item_type target_core_alua_cit */
2683
2684 /* Start functions for struct config_item_type target_core_stat_cit */
2685
2686 static struct config_group *target_core_stat_mkdir(
2687 struct config_group *group,
2688 const char *name)
2689 {
2690 return ERR_PTR(-ENOSYS);
2691 }
2692
2693 static void target_core_stat_rmdir(
2694 struct config_group *group,
2695 struct config_item *item)
2696 {
2697 return;
2698 }
2699
2700 static struct configfs_group_operations target_core_stat_group_ops = {
2701 .make_group = &target_core_stat_mkdir,
2702 .drop_item = &target_core_stat_rmdir,
2703 };
2704
2705 static struct config_item_type target_core_stat_cit = {
2706 .ct_group_ops = &target_core_stat_group_ops,
2707 .ct_owner = THIS_MODULE,
2708 };
2709
2710 /* End functions for struct config_item_type target_core_stat_cit */
2711
2712 /* Start functions for struct config_item_type target_core_hba_cit */
2713
2714 static struct config_group *target_core_make_subdev(
2715 struct config_group *group,
2716 const char *name)
2717 {
2718 struct t10_alua_tg_pt_gp *tg_pt_gp;
2719 struct se_subsystem_dev *se_dev;
2720 struct se_subsystem_api *t;
2721 struct config_item *hba_ci = &group->cg_item;
2722 struct se_hba *hba = item_to_hba(hba_ci);
2723 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2724 struct config_group *dev_stat_grp = NULL;
2725 int errno = -ENOMEM, ret;
2726
2727 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2728 if (ret)
2729 return ERR_PTR(ret);
2730 /*
2731 * Locate the struct se_subsystem_api from parent's struct se_hba.
2732 */
2733 t = hba->transport;
2734
2735 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2736 if (!se_dev) {
2737 pr_err("Unable to allocate memory for"
2738 " struct se_subsystem_dev\n");
2739 goto unlock;
2740 }
2741 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2742 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2743 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2744 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2745 spin_lock_init(&se_dev->t10_pr.registration_lock);
2746 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2747 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2748 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2749 spin_lock_init(&se_dev->se_dev_lock);
2750 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2751 se_dev->t10_wwn.t10_sub_dev = se_dev;
2752 se_dev->t10_alua.t10_sub_dev = se_dev;
2753 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2754
2755 se_dev->se_dev_hba = hba;
2756 dev_cg = &se_dev->se_dev_group;
2757
2758 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2759 GFP_KERNEL);
2760 if (!dev_cg->default_groups)
2761 goto out;
2762 /*
2763 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2764 * for ->allocate_virtdevice()
2765 *
2766 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2767 * has been called successfully in the next level up in the
2768 * configfs tree for device object's struct config_group.
2769 */
2770 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2771 if (!se_dev->se_dev_su_ptr) {
2772 pr_err("Unable to locate subsystem dependent pointer"
2773 " from allocate_virtdevice()\n");
2774 goto out;
2775 }
2776
2777 config_group_init_type_name(&se_dev->se_dev_group, name,
2778 &target_core_dev_cit);
2779 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2780 &target_core_dev_attrib_cit);
2781 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2782 &target_core_dev_pr_cit);
2783 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2784 &target_core_dev_wwn_cit);
2785 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2786 "alua", &target_core_alua_tg_pt_gps_cit);
2787 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2788 "statistics", &target_core_stat_cit);
2789
2790 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2791 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2792 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2793 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2794 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2795 dev_cg->default_groups[5] = NULL;
2796 /*
2797 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2798 */
2799 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2800 if (!tg_pt_gp)
2801 goto out;
2802
2803 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2804 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2805 GFP_KERNEL);
2806 if (!tg_pt_gp_cg->default_groups) {
2807 pr_err("Unable to allocate tg_pt_gp_cg->"
2808 "default_groups\n");
2809 goto out;
2810 }
2811
2812 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2813 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2814 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2815 tg_pt_gp_cg->default_groups[1] = NULL;
2816 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2817 /*
2818 * Add core/$HBA/$DEV/statistics/ default groups
2819 */
2820 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2821 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2822 GFP_KERNEL);
2823 if (!dev_stat_grp->default_groups) {
2824 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2825 goto out;
2826 }
2827 target_stat_setup_dev_default_groups(se_dev);
2828
2829 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2830 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2831
2832 mutex_unlock(&hba->hba_access_mutex);
2833 return &se_dev->se_dev_group;
2834 out:
2835 if (se_dev->t10_alua.default_tg_pt_gp) {
2836 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2837 se_dev->t10_alua.default_tg_pt_gp = NULL;
2838 }
2839 if (dev_stat_grp)
2840 kfree(dev_stat_grp->default_groups);
2841 if (tg_pt_gp_cg)
2842 kfree(tg_pt_gp_cg->default_groups);
2843 if (dev_cg)
2844 kfree(dev_cg->default_groups);
2845 if (se_dev->se_dev_su_ptr)
2846 t->free_device(se_dev->se_dev_su_ptr);
2847 kfree(se_dev);
2848 unlock:
2849 mutex_unlock(&hba->hba_access_mutex);
2850 return ERR_PTR(errno);
2851 }
2852
2853 static void target_core_drop_subdev(
2854 struct config_group *group,
2855 struct config_item *item)
2856 {
2857 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2858 struct se_subsystem_dev, se_dev_group);
2859 struct se_hba *hba;
2860 struct se_subsystem_api *t;
2861 struct config_item *df_item;
2862 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2863 int i;
2864
2865 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2866
2867 mutex_lock(&hba->hba_access_mutex);
2868 t = hba->transport;
2869
2870 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2871 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2872 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2873 dev_stat_grp->default_groups[i] = NULL;
2874 config_item_put(df_item);
2875 }
2876 kfree(dev_stat_grp->default_groups);
2877
2878 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2879 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2880 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2881 tg_pt_gp_cg->default_groups[i] = NULL;
2882 config_item_put(df_item);
2883 }
2884 kfree(tg_pt_gp_cg->default_groups);
2885 /*
2886 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2887 * directly from target_core_alua_tg_pt_gp_release().
2888 */
2889 se_dev->t10_alua.default_tg_pt_gp = NULL;
2890
2891 dev_cg = &se_dev->se_dev_group;
2892 for (i = 0; dev_cg->default_groups[i]; i++) {
2893 df_item = &dev_cg->default_groups[i]->cg_item;
2894 dev_cg->default_groups[i] = NULL;
2895 config_item_put(df_item);
2896 }
2897 /*
2898 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2899 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2900 */
2901 config_item_put(item);
2902 mutex_unlock(&hba->hba_access_mutex);
2903 }
2904
2905 static struct configfs_group_operations target_core_hba_group_ops = {
2906 .make_group = target_core_make_subdev,
2907 .drop_item = target_core_drop_subdev,
2908 };
2909
2910 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2911 #define SE_HBA_ATTR(_name, _mode) \
2912 static struct target_core_hba_attribute \
2913 target_core_hba_##_name = \
2914 __CONFIGFS_EATTR(_name, _mode, \
2915 target_core_hba_show_attr_##_name, \
2916 target_core_hba_store_attr_##_name);
2917
2918 #define SE_HBA_ATTR_RO(_name) \
2919 static struct target_core_hba_attribute \
2920 target_core_hba_##_name = \
2921 __CONFIGFS_EATTR_RO(_name, \
2922 target_core_hba_show_attr_##_name);
2923
2924 static ssize_t target_core_hba_show_attr_hba_info(
2925 struct se_hba *hba,
2926 char *page)
2927 {
2928 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2929 hba->hba_id, hba->transport->name,
2930 TARGET_CORE_CONFIGFS_VERSION);
2931 }
2932
2933 SE_HBA_ATTR_RO(hba_info);
2934
2935 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2936 char *page)
2937 {
2938 int hba_mode = 0;
2939
2940 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2941 hba_mode = 1;
2942
2943 return sprintf(page, "%d\n", hba_mode);
2944 }
2945
2946 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2947 const char *page, size_t count)
2948 {
2949 struct se_subsystem_api *transport = hba->transport;
2950 unsigned long mode_flag;
2951 int ret;
2952
2953 if (transport->pmode_enable_hba == NULL)
2954 return -EINVAL;
2955
2956 ret = strict_strtoul(page, 0, &mode_flag);
2957 if (ret < 0) {
2958 pr_err("Unable to extract hba mode flag: %d\n", ret);
2959 return -EINVAL;
2960 }
2961
2962 spin_lock(&hba->device_lock);
2963 if (!list_empty(&hba->hba_dev_list)) {
2964 pr_err("Unable to set hba_mode with active devices\n");
2965 spin_unlock(&hba->device_lock);
2966 return -EINVAL;
2967 }
2968 spin_unlock(&hba->device_lock);
2969
2970 ret = transport->pmode_enable_hba(hba, mode_flag);
2971 if (ret < 0)
2972 return -EINVAL;
2973 if (ret > 0)
2974 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2975 else if (ret == 0)
2976 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2977
2978 return count;
2979 }
2980
2981 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2982
2983 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2984
2985 static void target_core_hba_release(struct config_item *item)
2986 {
2987 struct se_hba *hba = container_of(to_config_group(item),
2988 struct se_hba, hba_group);
2989 core_delete_hba(hba);
2990 }
2991
2992 static struct configfs_attribute *target_core_hba_attrs[] = {
2993 &target_core_hba_hba_info.attr,
2994 &target_core_hba_hba_mode.attr,
2995 NULL,
2996 };
2997
2998 static struct configfs_item_operations target_core_hba_item_ops = {
2999 .release = target_core_hba_release,
3000 .show_attribute = target_core_hba_attr_show,
3001 .store_attribute = target_core_hba_attr_store,
3002 };
3003
3004 static struct config_item_type target_core_hba_cit = {
3005 .ct_item_ops = &target_core_hba_item_ops,
3006 .ct_group_ops = &target_core_hba_group_ops,
3007 .ct_attrs = target_core_hba_attrs,
3008 .ct_owner = THIS_MODULE,
3009 };
3010
3011 static struct config_group *target_core_call_addhbatotarget(
3012 struct config_group *group,
3013 const char *name)
3014 {
3015 char *se_plugin_str, *str, *str2;
3016 struct se_hba *hba;
3017 char buf[TARGET_CORE_NAME_MAX_LEN];
3018 unsigned long plugin_dep_id = 0;
3019 int ret;
3020
3021 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3022 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3023 pr_err("Passed *name strlen(): %d exceeds"
3024 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3025 TARGET_CORE_NAME_MAX_LEN);
3026 return ERR_PTR(-ENAMETOOLONG);
3027 }
3028 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3029
3030 str = strstr(buf, "_");
3031 if (!str) {
3032 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3033 return ERR_PTR(-EINVAL);
3034 }
3035 se_plugin_str = buf;
3036 /*
3037 * Special case for subsystem plugins that have "_" in their names.
3038 * Namely rd_direct and rd_mcp..
3039 */
3040 str2 = strstr(str+1, "_");
3041 if (str2) {
3042 *str2 = '\0'; /* Terminate for *se_plugin_str */
3043 str2++; /* Skip to start of plugin dependent ID */
3044 str = str2;
3045 } else {
3046 *str = '\0'; /* Terminate for *se_plugin_str */
3047 str++; /* Skip to start of plugin dependent ID */
3048 }
3049
3050 ret = strict_strtoul(str, 0, &plugin_dep_id);
3051 if (ret < 0) {
3052 pr_err("strict_strtoul() returned %d for"
3053 " plugin_dep_id\n", ret);
3054 return ERR_PTR(-EINVAL);
3055 }
3056 /*
3057 * Load up TCM subsystem plugins if they have not already been loaded.
3058 */
3059 transport_subsystem_check_init();
3060
3061 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3062 if (IS_ERR(hba))
3063 return ERR_CAST(hba);
3064
3065 config_group_init_type_name(&hba->hba_group, name,
3066 &target_core_hba_cit);
3067
3068 return &hba->hba_group;
3069 }
3070
3071 static void target_core_call_delhbafromtarget(
3072 struct config_group *group,
3073 struct config_item *item)
3074 {
3075 /*
3076 * core_delete_hba() is called from target_core_hba_item_ops->release()
3077 * -> target_core_hba_release()
3078 */
3079 config_item_put(item);
3080 }
3081
3082 static struct configfs_group_operations target_core_group_ops = {
3083 .make_group = target_core_call_addhbatotarget,
3084 .drop_item = target_core_call_delhbafromtarget,
3085 };
3086
3087 static struct config_item_type target_core_cit = {
3088 .ct_item_ops = NULL,
3089 .ct_group_ops = &target_core_group_ops,
3090 .ct_attrs = NULL,
3091 .ct_owner = THIS_MODULE,
3092 };
3093
3094 /* Stop functions for struct config_item_type target_core_hba_cit */
3095
3096 static int __init target_core_init_configfs(void)
3097 {
3098 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3099 struct config_group *lu_gp_cg = NULL;
3100 struct configfs_subsystem *subsys;
3101 struct t10_alua_lu_gp *lu_gp;
3102 int ret;
3103
3104 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3105 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3106 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3107
3108 subsys = target_core_subsystem[0];
3109 config_group_init(&subsys->su_group);
3110 mutex_init(&subsys->su_mutex);
3111
3112 INIT_LIST_HEAD(&g_tf_list);
3113 mutex_init(&g_tf_lock);
3114 ret = init_se_kmem_caches();
3115 if (ret < 0)
3116 return ret;
3117 /*
3118 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3119 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3120 */
3121 target_cg = &subsys->su_group;
3122 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3123 GFP_KERNEL);
3124 if (!target_cg->default_groups) {
3125 pr_err("Unable to allocate target_cg->default_groups\n");
3126 goto out_global;
3127 }
3128
3129 config_group_init_type_name(&target_core_hbagroup,
3130 "core", &target_core_cit);
3131 target_cg->default_groups[0] = &target_core_hbagroup;
3132 target_cg->default_groups[1] = NULL;
3133 /*
3134 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3135 */
3136 hba_cg = &target_core_hbagroup;
3137 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3138 GFP_KERNEL);
3139 if (!hba_cg->default_groups) {
3140 pr_err("Unable to allocate hba_cg->default_groups\n");
3141 goto out_global;
3142 }
3143 config_group_init_type_name(&alua_group,
3144 "alua", &target_core_alua_cit);
3145 hba_cg->default_groups[0] = &alua_group;
3146 hba_cg->default_groups[1] = NULL;
3147 /*
3148 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3149 * groups under /sys/kernel/config/target/core/alua/
3150 */
3151 alua_cg = &alua_group;
3152 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3153 GFP_KERNEL);
3154 if (!alua_cg->default_groups) {
3155 pr_err("Unable to allocate alua_cg->default_groups\n");
3156 goto out_global;
3157 }
3158
3159 config_group_init_type_name(&alua_lu_gps_group,
3160 "lu_gps", &target_core_alua_lu_gps_cit);
3161 alua_cg->default_groups[0] = &alua_lu_gps_group;
3162 alua_cg->default_groups[1] = NULL;
3163 /*
3164 * Add core/alua/lu_gps/default_lu_gp
3165 */
3166 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3167 if (IS_ERR(lu_gp))
3168 goto out_global;
3169
3170 lu_gp_cg = &alua_lu_gps_group;
3171 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3172 GFP_KERNEL);
3173 if (!lu_gp_cg->default_groups) {
3174 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3175 goto out_global;
3176 }
3177
3178 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3179 &target_core_alua_lu_gp_cit);
3180 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3181 lu_gp_cg->default_groups[1] = NULL;
3182 default_lu_gp = lu_gp;
3183 /*
3184 * Register the target_core_mod subsystem with configfs.
3185 */
3186 ret = configfs_register_subsystem(subsys);
3187 if (ret < 0) {
3188 pr_err("Error %d while registering subsystem %s\n",
3189 ret, subsys->su_group.cg_item.ci_namebuf);
3190 goto out_global;
3191 }
3192 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3193 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3194 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3195 /*
3196 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3197 */
3198 ret = rd_module_init();
3199 if (ret < 0)
3200 goto out;
3201
3202 if (core_dev_setup_virtual_lun0() < 0)
3203 goto out;
3204
3205 return 0;
3206
3207 out:
3208 configfs_unregister_subsystem(subsys);
3209 core_dev_release_virtual_lun0();
3210 rd_module_exit();
3211 out_global:
3212 if (default_lu_gp) {
3213 core_alua_free_lu_gp(default_lu_gp);
3214 default_lu_gp = NULL;
3215 }
3216 if (lu_gp_cg)
3217 kfree(lu_gp_cg->default_groups);
3218 if (alua_cg)
3219 kfree(alua_cg->default_groups);
3220 if (hba_cg)
3221 kfree(hba_cg->default_groups);
3222 kfree(target_cg->default_groups);
3223 release_se_kmem_caches();
3224 return ret;
3225 }
3226
3227 static void __exit target_core_exit_configfs(void)
3228 {
3229 struct configfs_subsystem *subsys;
3230 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3231 struct config_item *item;
3232 int i;
3233
3234 subsys = target_core_subsystem[0];
3235
3236 lu_gp_cg = &alua_lu_gps_group;
3237 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3238 item = &lu_gp_cg->default_groups[i]->cg_item;
3239 lu_gp_cg->default_groups[i] = NULL;
3240 config_item_put(item);
3241 }
3242 kfree(lu_gp_cg->default_groups);
3243 lu_gp_cg->default_groups = NULL;
3244
3245 alua_cg = &alua_group;
3246 for (i = 0; alua_cg->default_groups[i]; i++) {
3247 item = &alua_cg->default_groups[i]->cg_item;
3248 alua_cg->default_groups[i] = NULL;
3249 config_item_put(item);
3250 }
3251 kfree(alua_cg->default_groups);
3252 alua_cg->default_groups = NULL;
3253
3254 hba_cg = &target_core_hbagroup;
3255 for (i = 0; hba_cg->default_groups[i]; i++) {
3256 item = &hba_cg->default_groups[i]->cg_item;
3257 hba_cg->default_groups[i] = NULL;
3258 config_item_put(item);
3259 }
3260 kfree(hba_cg->default_groups);
3261 hba_cg->default_groups = NULL;
3262 /*
3263 * We expect subsys->su_group.default_groups to be released
3264 * by configfs subsystem provider logic..
3265 */
3266 configfs_unregister_subsystem(subsys);
3267 kfree(subsys->su_group.default_groups);
3268
3269 core_alua_free_lu_gp(default_lu_gp);
3270 default_lu_gp = NULL;
3271
3272 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3273 " Infrastructure\n");
3274
3275 core_dev_release_virtual_lun0();
3276 rd_module_exit();
3277 release_se_kmem_caches();
3278 }
3279
3280 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3281 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3282 MODULE_LICENSE("GPL");
3283
3284 module_init(target_core_init_configfs);
3285 module_exit(target_core_exit_configfs);
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