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target: Move dev_wwn_cit to struct se_subsystem_api
[deliverable/linux.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2013 Datera, Inc.
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
28 #include <linux/fs.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
39
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43 #include <target/target_core_fabric_configfs.h>
44 #include <target/target_core_configfs.h>
45 #include <target/configfs_macros.h>
46
47 #include "target_core_internal.h"
48 #include "target_core_alua.h"
49 #include "target_core_pr.h"
50 #include "target_core_rd.h"
51 #include "target_core_xcopy.h"
52
53 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
54 static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
55 { \
56 struct target_backend_cits *tbc = &sa->tb_cits; \
57 struct config_item_type *cit = &tbc->tb_##_name##_cit; \
58 \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = _attrs; \
62 cit->ct_owner = sa->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
64 }
65
66 extern struct t10_alua_lu_gp *default_lu_gp;
67
68 static LIST_HEAD(g_tf_list);
69 static DEFINE_MUTEX(g_tf_lock);
70
71 struct target_core_configfs_attribute {
72 struct configfs_attribute attr;
73 ssize_t (*show)(void *, char *);
74 ssize_t (*store)(void *, const char *, size_t);
75 };
76
77 static struct config_group target_core_hbagroup;
78 static struct config_group alua_group;
79 static struct config_group alua_lu_gps_group;
80
81 static inline struct se_hba *
82 item_to_hba(struct config_item *item)
83 {
84 return container_of(to_config_group(item), struct se_hba, hba_group);
85 }
86
87 /*
88 * Attributes for /sys/kernel/config/target/
89 */
90 static ssize_t target_core_attr_show(struct config_item *item,
91 struct configfs_attribute *attr,
92 char *page)
93 {
94 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
95 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
96 utsname()->sysname, utsname()->machine);
97 }
98
99 static struct configfs_item_operations target_core_fabric_item_ops = {
100 .show_attribute = target_core_attr_show,
101 };
102
103 static struct configfs_attribute target_core_item_attr_version = {
104 .ca_owner = THIS_MODULE,
105 .ca_name = "version",
106 .ca_mode = S_IRUGO,
107 };
108
109 static struct target_fabric_configfs *target_core_get_fabric(
110 const char *name)
111 {
112 struct target_fabric_configfs *tf;
113
114 if (!name)
115 return NULL;
116
117 mutex_lock(&g_tf_lock);
118 list_for_each_entry(tf, &g_tf_list, tf_list) {
119 if (!strcmp(tf->tf_name, name)) {
120 atomic_inc(&tf->tf_access_cnt);
121 mutex_unlock(&g_tf_lock);
122 return tf;
123 }
124 }
125 mutex_unlock(&g_tf_lock);
126
127 return NULL;
128 }
129
130 /*
131 * Called from struct target_core_group_ops->make_group()
132 */
133 static struct config_group *target_core_register_fabric(
134 struct config_group *group,
135 const char *name)
136 {
137 struct target_fabric_configfs *tf;
138 int ret;
139
140 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
141 " %s\n", group, name);
142
143 tf = target_core_get_fabric(name);
144 if (!tf) {
145 pr_err("target_core_register_fabric() trying autoload for %s\n",
146 name);
147
148 /*
149 * Below are some hardcoded request_module() calls to automatically
150 * local fabric modules when the following is called:
151 *
152 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
153 *
154 * Note that this does not limit which TCM fabric module can be
155 * registered, but simply provids auto loading logic for modules with
156 * mkdir(2) system calls with known TCM fabric modules.
157 */
158
159 if (!strncmp(name, "iscsi", 5)) {
160 /*
161 * Automatically load the LIO Target fabric module when the
162 * following is called:
163 *
164 * mkdir -p $CONFIGFS/target/iscsi
165 */
166 ret = request_module("iscsi_target_mod");
167 if (ret < 0) {
168 pr_err("request_module() failed for"
169 " iscsi_target_mod.ko: %d\n", ret);
170 return ERR_PTR(-EINVAL);
171 }
172 } else if (!strncmp(name, "loopback", 8)) {
173 /*
174 * Automatically load the tcm_loop fabric module when the
175 * following is called:
176 *
177 * mkdir -p $CONFIGFS/target/loopback
178 */
179 ret = request_module("tcm_loop");
180 if (ret < 0) {
181 pr_err("request_module() failed for"
182 " tcm_loop.ko: %d\n", ret);
183 return ERR_PTR(-EINVAL);
184 }
185 }
186
187 tf = target_core_get_fabric(name);
188 }
189
190 if (!tf) {
191 pr_err("target_core_get_fabric() failed for %s\n",
192 name);
193 return ERR_PTR(-EINVAL);
194 }
195 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
196 " %s\n", tf->tf_name);
197 /*
198 * On a successful target_core_get_fabric() look, the returned
199 * struct target_fabric_configfs *tf will contain a usage reference.
200 */
201 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
202 &tf->tf_cit_tmpl.tfc_wwn_cit);
203
204 tf->tf_group.default_groups = tf->tf_default_groups;
205 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
206 tf->tf_group.default_groups[1] = NULL;
207
208 config_group_init_type_name(&tf->tf_group, name,
209 &tf->tf_cit_tmpl.tfc_wwn_cit);
210 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
211 &tf->tf_cit_tmpl.tfc_discovery_cit);
212
213 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
214 " %s\n", tf->tf_group.cg_item.ci_name);
215 /*
216 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
217 */
218 tf->tf_ops.tf_subsys = tf->tf_subsys;
219 tf->tf_fabric = &tf->tf_group.cg_item;
220 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
221 " for %s\n", name);
222
223 return &tf->tf_group;
224 }
225
226 /*
227 * Called from struct target_core_group_ops->drop_item()
228 */
229 static void target_core_deregister_fabric(
230 struct config_group *group,
231 struct config_item *item)
232 {
233 struct target_fabric_configfs *tf = container_of(
234 to_config_group(item), struct target_fabric_configfs, tf_group);
235 struct config_group *tf_group;
236 struct config_item *df_item;
237 int i;
238
239 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
240 " tf list\n", config_item_name(item));
241
242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
243 " %s\n", tf->tf_name);
244 atomic_dec(&tf->tf_access_cnt);
245
246 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
247 " tf->tf_fabric for %s\n", tf->tf_name);
248 tf->tf_fabric = NULL;
249
250 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
251 " %s\n", config_item_name(item));
252
253 tf_group = &tf->tf_group;
254 for (i = 0; tf_group->default_groups[i]; i++) {
255 df_item = &tf_group->default_groups[i]->cg_item;
256 tf_group->default_groups[i] = NULL;
257 config_item_put(df_item);
258 }
259 config_item_put(item);
260 }
261
262 static struct configfs_group_operations target_core_fabric_group_ops = {
263 .make_group = &target_core_register_fabric,
264 .drop_item = &target_core_deregister_fabric,
265 };
266
267 /*
268 * All item attributes appearing in /sys/kernel/target/ appear here.
269 */
270 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
271 &target_core_item_attr_version,
272 NULL,
273 };
274
275 /*
276 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
277 */
278 static struct config_item_type target_core_fabrics_item = {
279 .ct_item_ops = &target_core_fabric_item_ops,
280 .ct_group_ops = &target_core_fabric_group_ops,
281 .ct_attrs = target_core_fabric_item_attrs,
282 .ct_owner = THIS_MODULE,
283 };
284
285 static struct configfs_subsystem target_core_fabrics = {
286 .su_group = {
287 .cg_item = {
288 .ci_namebuf = "target",
289 .ci_type = &target_core_fabrics_item,
290 },
291 },
292 };
293
294 struct configfs_subsystem *target_core_subsystem[] = {
295 &target_core_fabrics,
296 NULL,
297 };
298
299 /*##############################################################################
300 // Start functions called by external Target Fabrics Modules
301 //############################################################################*/
302
303 /*
304 * First function called by fabric modules to:
305 *
306 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
307 * 2) Add struct target_fabric_configfs to g_tf_list
308 * 3) Return struct target_fabric_configfs to fabric module to be passed
309 * into target_fabric_configfs_register().
310 */
311 struct target_fabric_configfs *target_fabric_configfs_init(
312 struct module *fabric_mod,
313 const char *name)
314 {
315 struct target_fabric_configfs *tf;
316
317 if (!(name)) {
318 pr_err("Unable to locate passed fabric name\n");
319 return ERR_PTR(-EINVAL);
320 }
321 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
322 pr_err("Passed name: %s exceeds TARGET_FABRIC"
323 "_NAME_SIZE\n", name);
324 return ERR_PTR(-EINVAL);
325 }
326
327 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
328 if (!tf)
329 return ERR_PTR(-ENOMEM);
330
331 INIT_LIST_HEAD(&tf->tf_list);
332 atomic_set(&tf->tf_access_cnt, 0);
333 /*
334 * Setup the default generic struct config_item_type's (cits) in
335 * struct target_fabric_configfs->tf_cit_tmpl
336 */
337 tf->tf_module = fabric_mod;
338 target_fabric_setup_cits(tf);
339
340 tf->tf_subsys = target_core_subsystem[0];
341 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
342
343 mutex_lock(&g_tf_lock);
344 list_add_tail(&tf->tf_list, &g_tf_list);
345 mutex_unlock(&g_tf_lock);
346
347 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
348 ">>>>>>>>>>>>>>\n");
349 pr_debug("Initialized struct target_fabric_configfs: %p for"
350 " %s\n", tf, tf->tf_name);
351 return tf;
352 }
353 EXPORT_SYMBOL(target_fabric_configfs_init);
354
355 /*
356 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
357 */
358 void target_fabric_configfs_free(
359 struct target_fabric_configfs *tf)
360 {
361 mutex_lock(&g_tf_lock);
362 list_del(&tf->tf_list);
363 mutex_unlock(&g_tf_lock);
364
365 kfree(tf);
366 }
367 EXPORT_SYMBOL(target_fabric_configfs_free);
368
369 /*
370 * Perform a sanity check of the passed tf->tf_ops before completing
371 * TCM fabric module registration.
372 */
373 static int target_fabric_tf_ops_check(
374 struct target_fabric_configfs *tf)
375 {
376 struct target_core_fabric_ops *tfo = &tf->tf_ops;
377
378 if (!tfo->get_fabric_name) {
379 pr_err("Missing tfo->get_fabric_name()\n");
380 return -EINVAL;
381 }
382 if (!tfo->get_fabric_proto_ident) {
383 pr_err("Missing tfo->get_fabric_proto_ident()\n");
384 return -EINVAL;
385 }
386 if (!tfo->tpg_get_wwn) {
387 pr_err("Missing tfo->tpg_get_wwn()\n");
388 return -EINVAL;
389 }
390 if (!tfo->tpg_get_tag) {
391 pr_err("Missing tfo->tpg_get_tag()\n");
392 return -EINVAL;
393 }
394 if (!tfo->tpg_get_default_depth) {
395 pr_err("Missing tfo->tpg_get_default_depth()\n");
396 return -EINVAL;
397 }
398 if (!tfo->tpg_get_pr_transport_id) {
399 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
400 return -EINVAL;
401 }
402 if (!tfo->tpg_get_pr_transport_id_len) {
403 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
404 return -EINVAL;
405 }
406 if (!tfo->tpg_check_demo_mode) {
407 pr_err("Missing tfo->tpg_check_demo_mode()\n");
408 return -EINVAL;
409 }
410 if (!tfo->tpg_check_demo_mode_cache) {
411 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
412 return -EINVAL;
413 }
414 if (!tfo->tpg_check_demo_mode_write_protect) {
415 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
416 return -EINVAL;
417 }
418 if (!tfo->tpg_check_prod_mode_write_protect) {
419 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
420 return -EINVAL;
421 }
422 if (!tfo->tpg_alloc_fabric_acl) {
423 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
424 return -EINVAL;
425 }
426 if (!tfo->tpg_release_fabric_acl) {
427 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
428 return -EINVAL;
429 }
430 if (!tfo->tpg_get_inst_index) {
431 pr_err("Missing tfo->tpg_get_inst_index()\n");
432 return -EINVAL;
433 }
434 if (!tfo->release_cmd) {
435 pr_err("Missing tfo->release_cmd()\n");
436 return -EINVAL;
437 }
438 if (!tfo->shutdown_session) {
439 pr_err("Missing tfo->shutdown_session()\n");
440 return -EINVAL;
441 }
442 if (!tfo->close_session) {
443 pr_err("Missing tfo->close_session()\n");
444 return -EINVAL;
445 }
446 if (!tfo->sess_get_index) {
447 pr_err("Missing tfo->sess_get_index()\n");
448 return -EINVAL;
449 }
450 if (!tfo->write_pending) {
451 pr_err("Missing tfo->write_pending()\n");
452 return -EINVAL;
453 }
454 if (!tfo->write_pending_status) {
455 pr_err("Missing tfo->write_pending_status()\n");
456 return -EINVAL;
457 }
458 if (!tfo->set_default_node_attributes) {
459 pr_err("Missing tfo->set_default_node_attributes()\n");
460 return -EINVAL;
461 }
462 if (!tfo->get_task_tag) {
463 pr_err("Missing tfo->get_task_tag()\n");
464 return -EINVAL;
465 }
466 if (!tfo->get_cmd_state) {
467 pr_err("Missing tfo->get_cmd_state()\n");
468 return -EINVAL;
469 }
470 if (!tfo->queue_data_in) {
471 pr_err("Missing tfo->queue_data_in()\n");
472 return -EINVAL;
473 }
474 if (!tfo->queue_status) {
475 pr_err("Missing tfo->queue_status()\n");
476 return -EINVAL;
477 }
478 if (!tfo->queue_tm_rsp) {
479 pr_err("Missing tfo->queue_tm_rsp()\n");
480 return -EINVAL;
481 }
482 if (!tfo->aborted_task) {
483 pr_err("Missing tfo->aborted_task()\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 tb_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 return snprintf(page, PAGE_SIZE, "%u\n", \
595 (u32)da->da_dev->dev_attrib._name); \
596 }
597
598 #define DEF_DEV_ATTRIB_STORE(_name) \
599 static ssize_t target_core_dev_store_attr_##_name( \
600 struct se_dev_attrib *da, \
601 const char *page, \
602 size_t count) \
603 { \
604 unsigned long val; \
605 int ret; \
606 \
607 ret = kstrtoul(page, 0, &val); \
608 if (ret < 0) { \
609 pr_err("kstrtoul() failed with" \
610 " ret: %d\n", ret); \
611 return -EINVAL; \
612 } \
613 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
614 \
615 return (!ret) ? count : -EINVAL; \
616 }
617
618 #define DEF_DEV_ATTRIB(_name) \
619 DEF_DEV_ATTRIB_SHOW(_name); \
620 DEF_DEV_ATTRIB_STORE(_name);
621
622 #define DEF_DEV_ATTRIB_RO(_name) \
623 DEF_DEV_ATTRIB_SHOW(_name);
624
625 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
626 #define SE_DEV_ATTR(_name, _mode) \
627 static struct target_core_dev_attrib_attribute \
628 target_core_dev_attrib_##_name = \
629 __CONFIGFS_EATTR(_name, _mode, \
630 target_core_dev_show_attr_##_name, \
631 target_core_dev_store_attr_##_name);
632
633 #define SE_DEV_ATTR_RO(_name); \
634 static struct target_core_dev_attrib_attribute \
635 target_core_dev_attrib_##_name = \
636 __CONFIGFS_EATTR_RO(_name, \
637 target_core_dev_show_attr_##_name);
638
639 DEF_DEV_ATTRIB(emulate_model_alias);
640 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
641
642 DEF_DEV_ATTRIB(emulate_dpo);
643 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
644
645 DEF_DEV_ATTRIB(emulate_fua_write);
646 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
647
648 DEF_DEV_ATTRIB(emulate_fua_read);
649 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
650
651 DEF_DEV_ATTRIB(emulate_write_cache);
652 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
653
654 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
655 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
656
657 DEF_DEV_ATTRIB(emulate_tas);
658 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
659
660 DEF_DEV_ATTRIB(emulate_tpu);
661 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
662
663 DEF_DEV_ATTRIB(emulate_tpws);
664 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
665
666 DEF_DEV_ATTRIB(emulate_caw);
667 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
668
669 DEF_DEV_ATTRIB(emulate_3pc);
670 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
671
672 DEF_DEV_ATTRIB(pi_prot_type);
673 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
674
675 DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
676 SE_DEV_ATTR_RO(hw_pi_prot_type);
677
678 DEF_DEV_ATTRIB(pi_prot_format);
679 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
680
681 DEF_DEV_ATTRIB(enforce_pr_isids);
682 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
683
684 DEF_DEV_ATTRIB(is_nonrot);
685 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
686
687 DEF_DEV_ATTRIB(emulate_rest_reord);
688 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
689
690 DEF_DEV_ATTRIB(force_pr_aptpl);
691 SE_DEV_ATTR(force_pr_aptpl, S_IRUGO | S_IWUSR);
692
693 DEF_DEV_ATTRIB_RO(hw_block_size);
694 SE_DEV_ATTR_RO(hw_block_size);
695
696 DEF_DEV_ATTRIB(block_size);
697 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
698
699 DEF_DEV_ATTRIB_RO(hw_max_sectors);
700 SE_DEV_ATTR_RO(hw_max_sectors);
701
702 DEF_DEV_ATTRIB(fabric_max_sectors);
703 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
704
705 DEF_DEV_ATTRIB(optimal_sectors);
706 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
707
708 DEF_DEV_ATTRIB_RO(hw_queue_depth);
709 SE_DEV_ATTR_RO(hw_queue_depth);
710
711 DEF_DEV_ATTRIB(queue_depth);
712 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
713
714 DEF_DEV_ATTRIB(max_unmap_lba_count);
715 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
716
717 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
718 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
719
720 DEF_DEV_ATTRIB(unmap_granularity);
721 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
722
723 DEF_DEV_ATTRIB(unmap_granularity_alignment);
724 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
725
726 DEF_DEV_ATTRIB(max_write_same_len);
727 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
728
729 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
730
731 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
732 &target_core_dev_attrib_emulate_model_alias.attr,
733 &target_core_dev_attrib_emulate_dpo.attr,
734 &target_core_dev_attrib_emulate_fua_write.attr,
735 &target_core_dev_attrib_emulate_fua_read.attr,
736 &target_core_dev_attrib_emulate_write_cache.attr,
737 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
738 &target_core_dev_attrib_emulate_tas.attr,
739 &target_core_dev_attrib_emulate_tpu.attr,
740 &target_core_dev_attrib_emulate_tpws.attr,
741 &target_core_dev_attrib_emulate_caw.attr,
742 &target_core_dev_attrib_emulate_3pc.attr,
743 &target_core_dev_attrib_pi_prot_type.attr,
744 &target_core_dev_attrib_hw_pi_prot_type.attr,
745 &target_core_dev_attrib_pi_prot_format.attr,
746 &target_core_dev_attrib_enforce_pr_isids.attr,
747 &target_core_dev_attrib_force_pr_aptpl.attr,
748 &target_core_dev_attrib_is_nonrot.attr,
749 &target_core_dev_attrib_emulate_rest_reord.attr,
750 &target_core_dev_attrib_hw_block_size.attr,
751 &target_core_dev_attrib_block_size.attr,
752 &target_core_dev_attrib_hw_max_sectors.attr,
753 &target_core_dev_attrib_fabric_max_sectors.attr,
754 &target_core_dev_attrib_optimal_sectors.attr,
755 &target_core_dev_attrib_hw_queue_depth.attr,
756 &target_core_dev_attrib_queue_depth.attr,
757 &target_core_dev_attrib_max_unmap_lba_count.attr,
758 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
759 &target_core_dev_attrib_unmap_granularity.attr,
760 &target_core_dev_attrib_unmap_granularity_alignment.attr,
761 &target_core_dev_attrib_max_write_same_len.attr,
762 NULL,
763 };
764
765 static struct configfs_item_operations target_core_dev_attrib_ops = {
766 .show_attribute = target_core_dev_attrib_attr_show,
767 .store_attribute = target_core_dev_attrib_attr_store,
768 };
769
770 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL,
771 target_core_dev_attrib_attrs);
772
773 /* End functions for struct config_item_type tb_dev_attrib_cit */
774
775 /* Start functions for struct config_item_type tb_dev_wwn_cit */
776
777 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
778 #define SE_DEV_WWN_ATTR(_name, _mode) \
779 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
780 __CONFIGFS_EATTR(_name, _mode, \
781 target_core_dev_wwn_show_attr_##_name, \
782 target_core_dev_wwn_store_attr_##_name);
783
784 #define SE_DEV_WWN_ATTR_RO(_name); \
785 do { \
786 static struct target_core_dev_wwn_attribute \
787 target_core_dev_wwn_##_name = \
788 __CONFIGFS_EATTR_RO(_name, \
789 target_core_dev_wwn_show_attr_##_name); \
790 } while (0);
791
792 /*
793 * VPD page 0x80 Unit serial
794 */
795 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
796 struct t10_wwn *t10_wwn,
797 char *page)
798 {
799 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
800 &t10_wwn->unit_serial[0]);
801 }
802
803 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
804 struct t10_wwn *t10_wwn,
805 const char *page,
806 size_t count)
807 {
808 struct se_device *dev = t10_wwn->t10_dev;
809 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
810
811 /*
812 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
813 * from the struct scsi_device level firmware, do not allow
814 * VPD Unit Serial to be emulated.
815 *
816 * Note this struct scsi_device could also be emulating VPD
817 * information from its drivers/scsi LLD. But for now we assume
818 * it is doing 'the right thing' wrt a world wide unique
819 * VPD Unit Serial Number that OS dependent multipath can depend on.
820 */
821 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
822 pr_err("Underlying SCSI device firmware provided VPD"
823 " Unit Serial, ignoring request\n");
824 return -EOPNOTSUPP;
825 }
826
827 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
828 pr_err("Emulated VPD Unit Serial exceeds"
829 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
830 return -EOVERFLOW;
831 }
832 /*
833 * Check to see if any active $FABRIC_MOD exports exist. If they
834 * do exist, fail here as changing this information on the fly
835 * (underneath the initiator side OS dependent multipath code)
836 * could cause negative effects.
837 */
838 if (dev->export_count) {
839 pr_err("Unable to set VPD Unit Serial while"
840 " active %d $FABRIC_MOD exports exist\n",
841 dev->export_count);
842 return -EINVAL;
843 }
844
845 /*
846 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
847 *
848 * Also, strip any newline added from the userspace
849 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
850 */
851 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
852 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
853 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
854 "%s", strstrip(buf));
855 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
856
857 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
858 " %s\n", dev->t10_wwn.unit_serial);
859
860 return count;
861 }
862
863 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
864
865 /*
866 * VPD page 0x83 Protocol Identifier
867 */
868 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
869 struct t10_wwn *t10_wwn,
870 char *page)
871 {
872 struct t10_vpd *vpd;
873 unsigned char buf[VPD_TMP_BUF_SIZE];
874 ssize_t len = 0;
875
876 memset(buf, 0, VPD_TMP_BUF_SIZE);
877
878 spin_lock(&t10_wwn->t10_vpd_lock);
879 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
880 if (!vpd->protocol_identifier_set)
881 continue;
882
883 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
884
885 if (len + strlen(buf) >= PAGE_SIZE)
886 break;
887
888 len += sprintf(page+len, "%s", buf);
889 }
890 spin_unlock(&t10_wwn->t10_vpd_lock);
891
892 return len;
893 }
894
895 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
896 struct t10_wwn *t10_wwn,
897 const char *page,
898 size_t count)
899 {
900 return -ENOSYS;
901 }
902
903 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
904
905 /*
906 * Generic wrapper for dumping VPD identifiers by association.
907 */
908 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
909 static ssize_t target_core_dev_wwn_show_attr_##_name( \
910 struct t10_wwn *t10_wwn, \
911 char *page) \
912 { \
913 struct t10_vpd *vpd; \
914 unsigned char buf[VPD_TMP_BUF_SIZE]; \
915 ssize_t len = 0; \
916 \
917 spin_lock(&t10_wwn->t10_vpd_lock); \
918 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
919 if (vpd->association != _assoc) \
920 continue; \
921 \
922 memset(buf, 0, VPD_TMP_BUF_SIZE); \
923 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
924 if (len + strlen(buf) >= PAGE_SIZE) \
925 break; \
926 len += sprintf(page+len, "%s", buf); \
927 \
928 memset(buf, 0, VPD_TMP_BUF_SIZE); \
929 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
930 if (len + strlen(buf) >= PAGE_SIZE) \
931 break; \
932 len += sprintf(page+len, "%s", buf); \
933 \
934 memset(buf, 0, VPD_TMP_BUF_SIZE); \
935 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
936 if (len + strlen(buf) >= PAGE_SIZE) \
937 break; \
938 len += sprintf(page+len, "%s", buf); \
939 } \
940 spin_unlock(&t10_wwn->t10_vpd_lock); \
941 \
942 return len; \
943 }
944
945 /*
946 * VPD page 0x83 Association: Logical Unit
947 */
948 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
949
950 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
951 struct t10_wwn *t10_wwn,
952 const char *page,
953 size_t count)
954 {
955 return -ENOSYS;
956 }
957
958 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
959
960 /*
961 * VPD page 0x83 Association: Target Port
962 */
963 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
964
965 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
966 struct t10_wwn *t10_wwn,
967 const char *page,
968 size_t count)
969 {
970 return -ENOSYS;
971 }
972
973 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
974
975 /*
976 * VPD page 0x83 Association: SCSI Target Device
977 */
978 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
979
980 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
981 struct t10_wwn *t10_wwn,
982 const char *page,
983 size_t count)
984 {
985 return -ENOSYS;
986 }
987
988 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
989
990 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
991
992 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
993 &target_core_dev_wwn_vpd_unit_serial.attr,
994 &target_core_dev_wwn_vpd_protocol_identifier.attr,
995 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
996 &target_core_dev_wwn_vpd_assoc_target_port.attr,
997 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
998 NULL,
999 };
1000
1001 static struct configfs_item_operations target_core_dev_wwn_ops = {
1002 .show_attribute = target_core_dev_wwn_attr_show,
1003 .store_attribute = target_core_dev_wwn_attr_store,
1004 };
1005
1006 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
1007
1008 /* End functions for struct config_item_type tb_dev_wwn_cit */
1009
1010 /* Start functions for struct config_item_type tb_dev_pr_cit */
1011
1012 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
1013 #define SE_DEV_PR_ATTR(_name, _mode) \
1014 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1015 __CONFIGFS_EATTR(_name, _mode, \
1016 target_core_dev_pr_show_attr_##_name, \
1017 target_core_dev_pr_store_attr_##_name);
1018
1019 #define SE_DEV_PR_ATTR_RO(_name); \
1020 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1021 __CONFIGFS_EATTR_RO(_name, \
1022 target_core_dev_pr_show_attr_##_name);
1023
1024 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1025 char *page)
1026 {
1027 struct se_node_acl *se_nacl;
1028 struct t10_pr_registration *pr_reg;
1029 char i_buf[PR_REG_ISID_ID_LEN];
1030
1031 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1032
1033 pr_reg = dev->dev_pr_res_holder;
1034 if (!pr_reg)
1035 return sprintf(page, "No SPC-3 Reservation holder\n");
1036
1037 se_nacl = pr_reg->pr_reg_nacl;
1038 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1039
1040 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1041 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1042 se_nacl->initiatorname, i_buf);
1043 }
1044
1045 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1046 char *page)
1047 {
1048 struct se_node_acl *se_nacl;
1049 ssize_t len;
1050
1051 se_nacl = dev->dev_reserved_node_acl;
1052 if (se_nacl) {
1053 len = sprintf(page,
1054 "SPC-2 Reservation: %s Initiator: %s\n",
1055 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1056 se_nacl->initiatorname);
1057 } else {
1058 len = sprintf(page, "No SPC-2 Reservation holder\n");
1059 }
1060 return len;
1061 }
1062
1063 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1064 char *page)
1065 {
1066 int ret;
1067
1068 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1069 return sprintf(page, "Passthrough\n");
1070
1071 spin_lock(&dev->dev_reservation_lock);
1072 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1073 ret = target_core_dev_pr_show_spc2_res(dev, page);
1074 else
1075 ret = target_core_dev_pr_show_spc3_res(dev, page);
1076 spin_unlock(&dev->dev_reservation_lock);
1077 return ret;
1078 }
1079
1080 SE_DEV_PR_ATTR_RO(res_holder);
1081
1082 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1083 struct se_device *dev, char *page)
1084 {
1085 ssize_t len = 0;
1086
1087 spin_lock(&dev->dev_reservation_lock);
1088 if (!dev->dev_pr_res_holder) {
1089 len = sprintf(page, "No SPC-3 Reservation holder\n");
1090 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1091 len = sprintf(page, "SPC-3 Reservation: All Target"
1092 " Ports registration\n");
1093 } else {
1094 len = sprintf(page, "SPC-3 Reservation: Single"
1095 " Target Port registration\n");
1096 }
1097
1098 spin_unlock(&dev->dev_reservation_lock);
1099 return len;
1100 }
1101
1102 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1103
1104 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1105 struct se_device *dev, char *page)
1106 {
1107 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1108 }
1109
1110 SE_DEV_PR_ATTR_RO(res_pr_generation);
1111
1112 /*
1113 * res_pr_holder_tg_port
1114 */
1115 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1116 struct se_device *dev, char *page)
1117 {
1118 struct se_node_acl *se_nacl;
1119 struct se_lun *lun;
1120 struct se_portal_group *se_tpg;
1121 struct t10_pr_registration *pr_reg;
1122 struct target_core_fabric_ops *tfo;
1123 ssize_t len = 0;
1124
1125 spin_lock(&dev->dev_reservation_lock);
1126 pr_reg = dev->dev_pr_res_holder;
1127 if (!pr_reg) {
1128 len = sprintf(page, "No SPC-3 Reservation holder\n");
1129 goto out_unlock;
1130 }
1131
1132 se_nacl = pr_reg->pr_reg_nacl;
1133 se_tpg = se_nacl->se_tpg;
1134 lun = pr_reg->pr_reg_tg_pt_lun;
1135 tfo = se_tpg->se_tpg_tfo;
1136
1137 len += sprintf(page+len, "SPC-3 Reservation: %s"
1138 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1139 tfo->tpg_get_wwn(se_tpg));
1140 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1141 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1142 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1143 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1144 tfo->get_fabric_name(), lun->unpacked_lun);
1145
1146 out_unlock:
1147 spin_unlock(&dev->dev_reservation_lock);
1148 return len;
1149 }
1150
1151 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1152
1153 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1154 struct se_device *dev, char *page)
1155 {
1156 struct target_core_fabric_ops *tfo;
1157 struct t10_pr_registration *pr_reg;
1158 unsigned char buf[384];
1159 char i_buf[PR_REG_ISID_ID_LEN];
1160 ssize_t len = 0;
1161 int reg_count = 0;
1162
1163 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1164
1165 spin_lock(&dev->t10_pr.registration_lock);
1166 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1167 pr_reg_list) {
1168
1169 memset(buf, 0, 384);
1170 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1171 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1172 core_pr_dump_initiator_port(pr_reg, i_buf,
1173 PR_REG_ISID_ID_LEN);
1174 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1175 tfo->get_fabric_name(),
1176 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1177 pr_reg->pr_res_generation);
1178
1179 if (len + strlen(buf) >= PAGE_SIZE)
1180 break;
1181
1182 len += sprintf(page+len, "%s", buf);
1183 reg_count++;
1184 }
1185 spin_unlock(&dev->t10_pr.registration_lock);
1186
1187 if (!reg_count)
1188 len += sprintf(page+len, "None\n");
1189
1190 return len;
1191 }
1192
1193 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1194
1195 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1196 struct se_device *dev, char *page)
1197 {
1198 struct t10_pr_registration *pr_reg;
1199 ssize_t len = 0;
1200
1201 spin_lock(&dev->dev_reservation_lock);
1202 pr_reg = dev->dev_pr_res_holder;
1203 if (pr_reg) {
1204 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1205 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1206 } else {
1207 len = sprintf(page, "No SPC-3 Reservation holder\n");
1208 }
1209
1210 spin_unlock(&dev->dev_reservation_lock);
1211 return len;
1212 }
1213
1214 SE_DEV_PR_ATTR_RO(res_pr_type);
1215
1216 static ssize_t target_core_dev_pr_show_attr_res_type(
1217 struct se_device *dev, char *page)
1218 {
1219 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1220 return sprintf(page, "SPC_PASSTHROUGH\n");
1221 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1222 return sprintf(page, "SPC2_RESERVATIONS\n");
1223 else
1224 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1225 }
1226
1227 SE_DEV_PR_ATTR_RO(res_type);
1228
1229 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1230 struct se_device *dev, char *page)
1231 {
1232 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1233 return 0;
1234
1235 return sprintf(page, "APTPL Bit Status: %s\n",
1236 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1237 }
1238
1239 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1240
1241 /*
1242 * res_aptpl_metadata
1243 */
1244 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1245 struct se_device *dev, char *page)
1246 {
1247 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1248 return 0;
1249
1250 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1251 }
1252
1253 enum {
1254 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1255 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1256 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1257 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1258 };
1259
1260 static match_table_t tokens = {
1261 {Opt_initiator_fabric, "initiator_fabric=%s"},
1262 {Opt_initiator_node, "initiator_node=%s"},
1263 {Opt_initiator_sid, "initiator_sid=%s"},
1264 {Opt_sa_res_key, "sa_res_key=%s"},
1265 {Opt_res_holder, "res_holder=%d"},
1266 {Opt_res_type, "res_type=%d"},
1267 {Opt_res_scope, "res_scope=%d"},
1268 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1269 {Opt_mapped_lun, "mapped_lun=%d"},
1270 {Opt_target_fabric, "target_fabric=%s"},
1271 {Opt_target_node, "target_node=%s"},
1272 {Opt_tpgt, "tpgt=%d"},
1273 {Opt_port_rtpi, "port_rtpi=%d"},
1274 {Opt_target_lun, "target_lun=%d"},
1275 {Opt_err, NULL}
1276 };
1277
1278 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1279 struct se_device *dev,
1280 const char *page,
1281 size_t count)
1282 {
1283 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1284 unsigned char *t_fabric = NULL, *t_port = NULL;
1285 char *orig, *ptr, *opts;
1286 substring_t args[MAX_OPT_ARGS];
1287 unsigned long long tmp_ll;
1288 u64 sa_res_key = 0;
1289 u32 mapped_lun = 0, target_lun = 0;
1290 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1291 u16 port_rpti = 0, tpgt = 0;
1292 u8 type = 0, scope;
1293
1294 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1295 return 0;
1296 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1297 return 0;
1298
1299 if (dev->export_count) {
1300 pr_debug("Unable to process APTPL metadata while"
1301 " active fabric exports exist\n");
1302 return -EINVAL;
1303 }
1304
1305 opts = kstrdup(page, GFP_KERNEL);
1306 if (!opts)
1307 return -ENOMEM;
1308
1309 orig = opts;
1310 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1311 if (!*ptr)
1312 continue;
1313
1314 token = match_token(ptr, tokens, args);
1315 switch (token) {
1316 case Opt_initiator_fabric:
1317 i_fabric = match_strdup(args);
1318 if (!i_fabric) {
1319 ret = -ENOMEM;
1320 goto out;
1321 }
1322 break;
1323 case Opt_initiator_node:
1324 i_port = match_strdup(args);
1325 if (!i_port) {
1326 ret = -ENOMEM;
1327 goto out;
1328 }
1329 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1330 pr_err("APTPL metadata initiator_node="
1331 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1332 PR_APTPL_MAX_IPORT_LEN);
1333 ret = -EINVAL;
1334 break;
1335 }
1336 break;
1337 case Opt_initiator_sid:
1338 isid = match_strdup(args);
1339 if (!isid) {
1340 ret = -ENOMEM;
1341 goto out;
1342 }
1343 if (strlen(isid) >= PR_REG_ISID_LEN) {
1344 pr_err("APTPL metadata initiator_isid"
1345 "= exceeds PR_REG_ISID_LEN: %d\n",
1346 PR_REG_ISID_LEN);
1347 ret = -EINVAL;
1348 break;
1349 }
1350 break;
1351 case Opt_sa_res_key:
1352 ret = kstrtoull(args->from, 0, &tmp_ll);
1353 if (ret < 0) {
1354 pr_err("kstrtoull() failed for sa_res_key=\n");
1355 goto out;
1356 }
1357 sa_res_key = (u64)tmp_ll;
1358 break;
1359 /*
1360 * PR APTPL Metadata for Reservation
1361 */
1362 case Opt_res_holder:
1363 match_int(args, &arg);
1364 res_holder = arg;
1365 break;
1366 case Opt_res_type:
1367 match_int(args, &arg);
1368 type = (u8)arg;
1369 break;
1370 case Opt_res_scope:
1371 match_int(args, &arg);
1372 scope = (u8)arg;
1373 break;
1374 case Opt_res_all_tg_pt:
1375 match_int(args, &arg);
1376 all_tg_pt = (int)arg;
1377 break;
1378 case Opt_mapped_lun:
1379 match_int(args, &arg);
1380 mapped_lun = (u32)arg;
1381 break;
1382 /*
1383 * PR APTPL Metadata for Target Port
1384 */
1385 case Opt_target_fabric:
1386 t_fabric = match_strdup(args);
1387 if (!t_fabric) {
1388 ret = -ENOMEM;
1389 goto out;
1390 }
1391 break;
1392 case Opt_target_node:
1393 t_port = match_strdup(args);
1394 if (!t_port) {
1395 ret = -ENOMEM;
1396 goto out;
1397 }
1398 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1399 pr_err("APTPL metadata target_node="
1400 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1401 PR_APTPL_MAX_TPORT_LEN);
1402 ret = -EINVAL;
1403 break;
1404 }
1405 break;
1406 case Opt_tpgt:
1407 match_int(args, &arg);
1408 tpgt = (u16)arg;
1409 break;
1410 case Opt_port_rtpi:
1411 match_int(args, &arg);
1412 port_rpti = (u16)arg;
1413 break;
1414 case Opt_target_lun:
1415 match_int(args, &arg);
1416 target_lun = (u32)arg;
1417 break;
1418 default:
1419 break;
1420 }
1421 }
1422
1423 if (!i_port || !t_port || !sa_res_key) {
1424 pr_err("Illegal parameters for APTPL registration\n");
1425 ret = -EINVAL;
1426 goto out;
1427 }
1428
1429 if (res_holder && !(type)) {
1430 pr_err("Illegal PR type: 0x%02x for reservation"
1431 " holder\n", type);
1432 ret = -EINVAL;
1433 goto out;
1434 }
1435
1436 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1437 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1438 res_holder, all_tg_pt, type);
1439 out:
1440 kfree(i_fabric);
1441 kfree(i_port);
1442 kfree(isid);
1443 kfree(t_fabric);
1444 kfree(t_port);
1445 kfree(orig);
1446 return (ret == 0) ? count : ret;
1447 }
1448
1449 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1450
1451 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1452
1453 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1454 &target_core_dev_pr_res_holder.attr,
1455 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1456 &target_core_dev_pr_res_pr_generation.attr,
1457 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1458 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1459 &target_core_dev_pr_res_pr_type.attr,
1460 &target_core_dev_pr_res_type.attr,
1461 &target_core_dev_pr_res_aptpl_active.attr,
1462 &target_core_dev_pr_res_aptpl_metadata.attr,
1463 NULL,
1464 };
1465
1466 static struct configfs_item_operations target_core_dev_pr_ops = {
1467 .show_attribute = target_core_dev_pr_attr_show,
1468 .store_attribute = target_core_dev_pr_attr_store,
1469 };
1470
1471 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1472
1473 /* End functions for struct config_item_type tb_dev_pr_cit */
1474
1475 /* Start functions for struct config_item_type tb_dev_cit */
1476
1477 static ssize_t target_core_show_dev_info(void *p, char *page)
1478 {
1479 struct se_device *dev = p;
1480 struct se_subsystem_api *t = dev->transport;
1481 int bl = 0;
1482 ssize_t read_bytes = 0;
1483
1484 transport_dump_dev_state(dev, page, &bl);
1485 read_bytes += bl;
1486 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1487 return read_bytes;
1488 }
1489
1490 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1491 .attr = { .ca_owner = THIS_MODULE,
1492 .ca_name = "info",
1493 .ca_mode = S_IRUGO },
1494 .show = target_core_show_dev_info,
1495 .store = NULL,
1496 };
1497
1498 static ssize_t target_core_store_dev_control(
1499 void *p,
1500 const char *page,
1501 size_t count)
1502 {
1503 struct se_device *dev = p;
1504 struct se_subsystem_api *t = dev->transport;
1505
1506 return t->set_configfs_dev_params(dev, page, count);
1507 }
1508
1509 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1510 .attr = { .ca_owner = THIS_MODULE,
1511 .ca_name = "control",
1512 .ca_mode = S_IWUSR },
1513 .show = NULL,
1514 .store = target_core_store_dev_control,
1515 };
1516
1517 static ssize_t target_core_show_dev_alias(void *p, char *page)
1518 {
1519 struct se_device *dev = p;
1520
1521 if (!(dev->dev_flags & DF_USING_ALIAS))
1522 return 0;
1523
1524 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1525 }
1526
1527 static ssize_t target_core_store_dev_alias(
1528 void *p,
1529 const char *page,
1530 size_t count)
1531 {
1532 struct se_device *dev = p;
1533 struct se_hba *hba = dev->se_hba;
1534 ssize_t read_bytes;
1535
1536 if (count > (SE_DEV_ALIAS_LEN-1)) {
1537 pr_err("alias count: %d exceeds"
1538 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1539 SE_DEV_ALIAS_LEN-1);
1540 return -EINVAL;
1541 }
1542
1543 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1544 if (!read_bytes)
1545 return -EINVAL;
1546 if (dev->dev_alias[read_bytes - 1] == '\n')
1547 dev->dev_alias[read_bytes - 1] = '\0';
1548
1549 dev->dev_flags |= DF_USING_ALIAS;
1550
1551 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1552 config_item_name(&hba->hba_group.cg_item),
1553 config_item_name(&dev->dev_group.cg_item),
1554 dev->dev_alias);
1555
1556 return read_bytes;
1557 }
1558
1559 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1560 .attr = { .ca_owner = THIS_MODULE,
1561 .ca_name = "alias",
1562 .ca_mode = S_IRUGO | S_IWUSR },
1563 .show = target_core_show_dev_alias,
1564 .store = target_core_store_dev_alias,
1565 };
1566
1567 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1568 {
1569 struct se_device *dev = p;
1570
1571 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1572 return 0;
1573
1574 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1575 }
1576
1577 static ssize_t target_core_store_dev_udev_path(
1578 void *p,
1579 const char *page,
1580 size_t count)
1581 {
1582 struct se_device *dev = p;
1583 struct se_hba *hba = dev->se_hba;
1584 ssize_t read_bytes;
1585
1586 if (count > (SE_UDEV_PATH_LEN-1)) {
1587 pr_err("udev_path count: %d exceeds"
1588 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1589 SE_UDEV_PATH_LEN-1);
1590 return -EINVAL;
1591 }
1592
1593 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1594 "%s", page);
1595 if (!read_bytes)
1596 return -EINVAL;
1597 if (dev->udev_path[read_bytes - 1] == '\n')
1598 dev->udev_path[read_bytes - 1] = '\0';
1599
1600 dev->dev_flags |= DF_USING_UDEV_PATH;
1601
1602 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1603 config_item_name(&hba->hba_group.cg_item),
1604 config_item_name(&dev->dev_group.cg_item),
1605 dev->udev_path);
1606
1607 return read_bytes;
1608 }
1609
1610 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1611 .attr = { .ca_owner = THIS_MODULE,
1612 .ca_name = "udev_path",
1613 .ca_mode = S_IRUGO | S_IWUSR },
1614 .show = target_core_show_dev_udev_path,
1615 .store = target_core_store_dev_udev_path,
1616 };
1617
1618 static ssize_t target_core_show_dev_enable(void *p, char *page)
1619 {
1620 struct se_device *dev = p;
1621
1622 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1623 }
1624
1625 static ssize_t target_core_store_dev_enable(
1626 void *p,
1627 const char *page,
1628 size_t count)
1629 {
1630 struct se_device *dev = p;
1631 char *ptr;
1632 int ret;
1633
1634 ptr = strstr(page, "1");
1635 if (!ptr) {
1636 pr_err("For dev_enable ops, only valid value"
1637 " is \"1\"\n");
1638 return -EINVAL;
1639 }
1640
1641 ret = target_configure_device(dev);
1642 if (ret)
1643 return ret;
1644 return count;
1645 }
1646
1647 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1648 .attr = { .ca_owner = THIS_MODULE,
1649 .ca_name = "enable",
1650 .ca_mode = S_IRUGO | S_IWUSR },
1651 .show = target_core_show_dev_enable,
1652 .store = target_core_store_dev_enable,
1653 };
1654
1655 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1656 {
1657 struct se_device *dev = p;
1658 struct config_item *lu_ci;
1659 struct t10_alua_lu_gp *lu_gp;
1660 struct t10_alua_lu_gp_member *lu_gp_mem;
1661 ssize_t len = 0;
1662
1663 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1664 if (!lu_gp_mem)
1665 return 0;
1666
1667 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1668 lu_gp = lu_gp_mem->lu_gp;
1669 if (lu_gp) {
1670 lu_ci = &lu_gp->lu_gp_group.cg_item;
1671 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1672 config_item_name(lu_ci), lu_gp->lu_gp_id);
1673 }
1674 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1675
1676 return len;
1677 }
1678
1679 static ssize_t target_core_store_alua_lu_gp(
1680 void *p,
1681 const char *page,
1682 size_t count)
1683 {
1684 struct se_device *dev = p;
1685 struct se_hba *hba = dev->se_hba;
1686 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1687 struct t10_alua_lu_gp_member *lu_gp_mem;
1688 unsigned char buf[LU_GROUP_NAME_BUF];
1689 int move = 0;
1690
1691 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1692 if (!lu_gp_mem)
1693 return 0;
1694
1695 if (count > LU_GROUP_NAME_BUF) {
1696 pr_err("ALUA LU Group Alias too large!\n");
1697 return -EINVAL;
1698 }
1699 memset(buf, 0, LU_GROUP_NAME_BUF);
1700 memcpy(buf, page, count);
1701 /*
1702 * Any ALUA logical unit alias besides "NULL" means we will be
1703 * making a new group association.
1704 */
1705 if (strcmp(strstrip(buf), "NULL")) {
1706 /*
1707 * core_alua_get_lu_gp_by_name() will increment reference to
1708 * struct t10_alua_lu_gp. This reference is released with
1709 * core_alua_get_lu_gp_by_name below().
1710 */
1711 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1712 if (!lu_gp_new)
1713 return -ENODEV;
1714 }
1715
1716 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1717 lu_gp = lu_gp_mem->lu_gp;
1718 if (lu_gp) {
1719 /*
1720 * Clearing an existing lu_gp association, and replacing
1721 * with NULL
1722 */
1723 if (!lu_gp_new) {
1724 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1725 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1726 " %hu\n",
1727 config_item_name(&hba->hba_group.cg_item),
1728 config_item_name(&dev->dev_group.cg_item),
1729 config_item_name(&lu_gp->lu_gp_group.cg_item),
1730 lu_gp->lu_gp_id);
1731
1732 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1733 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1734
1735 return count;
1736 }
1737 /*
1738 * Removing existing association of lu_gp_mem with lu_gp
1739 */
1740 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1741 move = 1;
1742 }
1743 /*
1744 * Associate lu_gp_mem with lu_gp_new.
1745 */
1746 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1747 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1748
1749 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1750 " core/alua/lu_gps/%s, ID: %hu\n",
1751 (move) ? "Moving" : "Adding",
1752 config_item_name(&hba->hba_group.cg_item),
1753 config_item_name(&dev->dev_group.cg_item),
1754 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1755 lu_gp_new->lu_gp_id);
1756
1757 core_alua_put_lu_gp_from_name(lu_gp_new);
1758 return count;
1759 }
1760
1761 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1762 .attr = { .ca_owner = THIS_MODULE,
1763 .ca_name = "alua_lu_gp",
1764 .ca_mode = S_IRUGO | S_IWUSR },
1765 .show = target_core_show_alua_lu_gp,
1766 .store = target_core_store_alua_lu_gp,
1767 };
1768
1769 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1770 {
1771 struct se_device *dev = p;
1772 struct t10_alua_lba_map *map;
1773 struct t10_alua_lba_map_member *mem;
1774 char *b = page;
1775 int bl = 0;
1776 char state;
1777
1778 spin_lock(&dev->t10_alua.lba_map_lock);
1779 if (!list_empty(&dev->t10_alua.lba_map_list))
1780 bl += sprintf(b + bl, "%u %u\n",
1781 dev->t10_alua.lba_map_segment_size,
1782 dev->t10_alua.lba_map_segment_multiplier);
1783 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1784 bl += sprintf(b + bl, "%llu %llu",
1785 map->lba_map_first_lba, map->lba_map_last_lba);
1786 list_for_each_entry(mem, &map->lba_map_mem_list,
1787 lba_map_mem_list) {
1788 switch (mem->lba_map_mem_alua_state) {
1789 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1790 state = 'O';
1791 break;
1792 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1793 state = 'A';
1794 break;
1795 case ALUA_ACCESS_STATE_STANDBY:
1796 state = 'S';
1797 break;
1798 case ALUA_ACCESS_STATE_UNAVAILABLE:
1799 state = 'U';
1800 break;
1801 default:
1802 state = '.';
1803 break;
1804 }
1805 bl += sprintf(b + bl, " %d:%c",
1806 mem->lba_map_mem_alua_pg_id, state);
1807 }
1808 bl += sprintf(b + bl, "\n");
1809 }
1810 spin_unlock(&dev->t10_alua.lba_map_lock);
1811 return bl;
1812 }
1813
1814 static ssize_t target_core_store_dev_lba_map(
1815 void *p,
1816 const char *page,
1817 size_t count)
1818 {
1819 struct se_device *dev = p;
1820 struct t10_alua_lba_map *lba_map = NULL;
1821 struct list_head lba_list;
1822 char *map_entries, *ptr;
1823 char state;
1824 int pg_num = -1, pg;
1825 int ret = 0, num = 0, pg_id, alua_state;
1826 unsigned long start_lba = -1, end_lba = -1;
1827 unsigned long segment_size = -1, segment_mult = -1;
1828
1829 map_entries = kstrdup(page, GFP_KERNEL);
1830 if (!map_entries)
1831 return -ENOMEM;
1832
1833 INIT_LIST_HEAD(&lba_list);
1834 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1835 if (!*ptr)
1836 continue;
1837
1838 if (num == 0) {
1839 if (sscanf(ptr, "%lu %lu\n",
1840 &segment_size, &segment_mult) != 2) {
1841 pr_err("Invalid line %d\n", num);
1842 ret = -EINVAL;
1843 break;
1844 }
1845 num++;
1846 continue;
1847 }
1848 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1849 pr_err("Invalid line %d\n", num);
1850 ret = -EINVAL;
1851 break;
1852 }
1853 ptr = strchr(ptr, ' ');
1854 if (!ptr) {
1855 pr_err("Invalid line %d, missing end lba\n", num);
1856 ret = -EINVAL;
1857 break;
1858 }
1859 ptr++;
1860 ptr = strchr(ptr, ' ');
1861 if (!ptr) {
1862 pr_err("Invalid line %d, missing state definitions\n",
1863 num);
1864 ret = -EINVAL;
1865 break;
1866 }
1867 ptr++;
1868 lba_map = core_alua_allocate_lba_map(&lba_list,
1869 start_lba, end_lba);
1870 if (IS_ERR(lba_map)) {
1871 ret = PTR_ERR(lba_map);
1872 break;
1873 }
1874 pg = 0;
1875 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1876 switch (state) {
1877 case 'O':
1878 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1879 break;
1880 case 'A':
1881 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1882 break;
1883 case 'S':
1884 alua_state = ALUA_ACCESS_STATE_STANDBY;
1885 break;
1886 case 'U':
1887 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1888 break;
1889 default:
1890 pr_err("Invalid ALUA state '%c'\n", state);
1891 ret = -EINVAL;
1892 goto out;
1893 }
1894
1895 ret = core_alua_allocate_lba_map_mem(lba_map,
1896 pg_id, alua_state);
1897 if (ret) {
1898 pr_err("Invalid target descriptor %d:%c "
1899 "at line %d\n",
1900 pg_id, state, num);
1901 break;
1902 }
1903 pg++;
1904 ptr = strchr(ptr, ' ');
1905 if (ptr)
1906 ptr++;
1907 else
1908 break;
1909 }
1910 if (pg_num == -1)
1911 pg_num = pg;
1912 else if (pg != pg_num) {
1913 pr_err("Only %d from %d port groups definitions "
1914 "at line %d\n", pg, pg_num, num);
1915 ret = -EINVAL;
1916 break;
1917 }
1918 num++;
1919 }
1920 out:
1921 if (ret) {
1922 core_alua_free_lba_map(&lba_list);
1923 count = ret;
1924 } else
1925 core_alua_set_lba_map(dev, &lba_list,
1926 segment_size, segment_mult);
1927 kfree(map_entries);
1928 return count;
1929 }
1930
1931 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1932 .attr = { .ca_owner = THIS_MODULE,
1933 .ca_name = "lba_map",
1934 .ca_mode = S_IRUGO | S_IWUSR },
1935 .show = target_core_show_dev_lba_map,
1936 .store = target_core_store_dev_lba_map,
1937 };
1938
1939 static struct configfs_attribute *target_core_dev_attrs[] = {
1940 &target_core_attr_dev_info.attr,
1941 &target_core_attr_dev_control.attr,
1942 &target_core_attr_dev_alias.attr,
1943 &target_core_attr_dev_udev_path.attr,
1944 &target_core_attr_dev_enable.attr,
1945 &target_core_attr_dev_alua_lu_gp.attr,
1946 &target_core_attr_dev_lba_map.attr,
1947 NULL,
1948 };
1949
1950 static void target_core_dev_release(struct config_item *item)
1951 {
1952 struct config_group *dev_cg = to_config_group(item);
1953 struct se_device *dev =
1954 container_of(dev_cg, struct se_device, dev_group);
1955
1956 kfree(dev_cg->default_groups);
1957 target_free_device(dev);
1958 }
1959
1960 static ssize_t target_core_dev_show(struct config_item *item,
1961 struct configfs_attribute *attr,
1962 char *page)
1963 {
1964 struct config_group *dev_cg = to_config_group(item);
1965 struct se_device *dev =
1966 container_of(dev_cg, struct se_device, dev_group);
1967 struct target_core_configfs_attribute *tc_attr = container_of(
1968 attr, struct target_core_configfs_attribute, attr);
1969
1970 if (!tc_attr->show)
1971 return -EINVAL;
1972
1973 return tc_attr->show(dev, page);
1974 }
1975
1976 static ssize_t target_core_dev_store(struct config_item *item,
1977 struct configfs_attribute *attr,
1978 const char *page, size_t count)
1979 {
1980 struct config_group *dev_cg = to_config_group(item);
1981 struct se_device *dev =
1982 container_of(dev_cg, struct se_device, dev_group);
1983 struct target_core_configfs_attribute *tc_attr = container_of(
1984 attr, struct target_core_configfs_attribute, attr);
1985
1986 if (!tc_attr->store)
1987 return -EINVAL;
1988
1989 return tc_attr->store(dev, page, count);
1990 }
1991
1992 static struct configfs_item_operations target_core_dev_item_ops = {
1993 .release = target_core_dev_release,
1994 .show_attribute = target_core_dev_show,
1995 .store_attribute = target_core_dev_store,
1996 };
1997
1998 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
1999
2000 /* End functions for struct config_item_type tb_dev_cit */
2001
2002 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2003
2004 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2005 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2006 static struct target_core_alua_lu_gp_attribute \
2007 target_core_alua_lu_gp_##_name = \
2008 __CONFIGFS_EATTR(_name, _mode, \
2009 target_core_alua_lu_gp_show_attr_##_name, \
2010 target_core_alua_lu_gp_store_attr_##_name);
2011
2012 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2013 static struct target_core_alua_lu_gp_attribute \
2014 target_core_alua_lu_gp_##_name = \
2015 __CONFIGFS_EATTR_RO(_name, \
2016 target_core_alua_lu_gp_show_attr_##_name);
2017
2018 /*
2019 * lu_gp_id
2020 */
2021 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2022 struct t10_alua_lu_gp *lu_gp,
2023 char *page)
2024 {
2025 if (!lu_gp->lu_gp_valid_id)
2026 return 0;
2027
2028 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2029 }
2030
2031 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2032 struct t10_alua_lu_gp *lu_gp,
2033 const char *page,
2034 size_t count)
2035 {
2036 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2037 unsigned long lu_gp_id;
2038 int ret;
2039
2040 ret = kstrtoul(page, 0, &lu_gp_id);
2041 if (ret < 0) {
2042 pr_err("kstrtoul() returned %d for"
2043 " lu_gp_id\n", ret);
2044 return ret;
2045 }
2046 if (lu_gp_id > 0x0000ffff) {
2047 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2048 " 0x0000ffff\n", lu_gp_id);
2049 return -EINVAL;
2050 }
2051
2052 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2053 if (ret < 0)
2054 return -EINVAL;
2055
2056 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2057 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2058 config_item_name(&alua_lu_gp_cg->cg_item),
2059 lu_gp->lu_gp_id);
2060
2061 return count;
2062 }
2063
2064 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2065
2066 /*
2067 * members
2068 */
2069 static ssize_t target_core_alua_lu_gp_show_attr_members(
2070 struct t10_alua_lu_gp *lu_gp,
2071 char *page)
2072 {
2073 struct se_device *dev;
2074 struct se_hba *hba;
2075 struct t10_alua_lu_gp_member *lu_gp_mem;
2076 ssize_t len = 0, cur_len;
2077 unsigned char buf[LU_GROUP_NAME_BUF];
2078
2079 memset(buf, 0, LU_GROUP_NAME_BUF);
2080
2081 spin_lock(&lu_gp->lu_gp_lock);
2082 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2083 dev = lu_gp_mem->lu_gp_mem_dev;
2084 hba = dev->se_hba;
2085
2086 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2087 config_item_name(&hba->hba_group.cg_item),
2088 config_item_name(&dev->dev_group.cg_item));
2089 cur_len++; /* Extra byte for NULL terminator */
2090
2091 if ((cur_len + len) > PAGE_SIZE) {
2092 pr_warn("Ran out of lu_gp_show_attr"
2093 "_members buffer\n");
2094 break;
2095 }
2096 memcpy(page+len, buf, cur_len);
2097 len += cur_len;
2098 }
2099 spin_unlock(&lu_gp->lu_gp_lock);
2100
2101 return len;
2102 }
2103
2104 SE_DEV_ALUA_LU_ATTR_RO(members);
2105
2106 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2107
2108 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2109 &target_core_alua_lu_gp_lu_gp_id.attr,
2110 &target_core_alua_lu_gp_members.attr,
2111 NULL,
2112 };
2113
2114 static void target_core_alua_lu_gp_release(struct config_item *item)
2115 {
2116 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2117 struct t10_alua_lu_gp, lu_gp_group);
2118
2119 core_alua_free_lu_gp(lu_gp);
2120 }
2121
2122 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2123 .release = target_core_alua_lu_gp_release,
2124 .show_attribute = target_core_alua_lu_gp_attr_show,
2125 .store_attribute = target_core_alua_lu_gp_attr_store,
2126 };
2127
2128 static struct config_item_type target_core_alua_lu_gp_cit = {
2129 .ct_item_ops = &target_core_alua_lu_gp_ops,
2130 .ct_attrs = target_core_alua_lu_gp_attrs,
2131 .ct_owner = THIS_MODULE,
2132 };
2133
2134 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2135
2136 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2137
2138 static struct config_group *target_core_alua_create_lu_gp(
2139 struct config_group *group,
2140 const char *name)
2141 {
2142 struct t10_alua_lu_gp *lu_gp;
2143 struct config_group *alua_lu_gp_cg = NULL;
2144 struct config_item *alua_lu_gp_ci = NULL;
2145
2146 lu_gp = core_alua_allocate_lu_gp(name, 0);
2147 if (IS_ERR(lu_gp))
2148 return NULL;
2149
2150 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2151 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2152
2153 config_group_init_type_name(alua_lu_gp_cg, name,
2154 &target_core_alua_lu_gp_cit);
2155
2156 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2157 " Group: core/alua/lu_gps/%s\n",
2158 config_item_name(alua_lu_gp_ci));
2159
2160 return alua_lu_gp_cg;
2161
2162 }
2163
2164 static void target_core_alua_drop_lu_gp(
2165 struct config_group *group,
2166 struct config_item *item)
2167 {
2168 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2169 struct t10_alua_lu_gp, lu_gp_group);
2170
2171 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2172 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2173 config_item_name(item), lu_gp->lu_gp_id);
2174 /*
2175 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2176 * -> target_core_alua_lu_gp_release()
2177 */
2178 config_item_put(item);
2179 }
2180
2181 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2182 .make_group = &target_core_alua_create_lu_gp,
2183 .drop_item = &target_core_alua_drop_lu_gp,
2184 };
2185
2186 static struct config_item_type target_core_alua_lu_gps_cit = {
2187 .ct_item_ops = NULL,
2188 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2189 .ct_owner = THIS_MODULE,
2190 };
2191
2192 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2193
2194 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2195
2196 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2197 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2198 static struct target_core_alua_tg_pt_gp_attribute \
2199 target_core_alua_tg_pt_gp_##_name = \
2200 __CONFIGFS_EATTR(_name, _mode, \
2201 target_core_alua_tg_pt_gp_show_attr_##_name, \
2202 target_core_alua_tg_pt_gp_store_attr_##_name);
2203
2204 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2205 static struct target_core_alua_tg_pt_gp_attribute \
2206 target_core_alua_tg_pt_gp_##_name = \
2207 __CONFIGFS_EATTR_RO(_name, \
2208 target_core_alua_tg_pt_gp_show_attr_##_name);
2209
2210 /*
2211 * alua_access_state
2212 */
2213 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2214 struct t10_alua_tg_pt_gp *tg_pt_gp,
2215 char *page)
2216 {
2217 return sprintf(page, "%d\n",
2218 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2219 }
2220
2221 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2222 struct t10_alua_tg_pt_gp *tg_pt_gp,
2223 const char *page,
2224 size_t count)
2225 {
2226 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2227 unsigned long tmp;
2228 int new_state, ret;
2229
2230 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2231 pr_err("Unable to do implicit ALUA on non valid"
2232 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2233 return -EINVAL;
2234 }
2235 if (!(dev->dev_flags & DF_CONFIGURED)) {
2236 pr_err("Unable to set alua_access_state while device is"
2237 " not configured\n");
2238 return -ENODEV;
2239 }
2240
2241 ret = kstrtoul(page, 0, &tmp);
2242 if (ret < 0) {
2243 pr_err("Unable to extract new ALUA access state from"
2244 " %s\n", page);
2245 return ret;
2246 }
2247 new_state = (int)tmp;
2248
2249 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2250 pr_err("Unable to process implicit configfs ALUA"
2251 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2252 return -EINVAL;
2253 }
2254 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2255 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2256 /* LBA DEPENDENT is only allowed with implicit ALUA */
2257 pr_err("Unable to process implicit configfs ALUA transition"
2258 " while explicit ALUA management is enabled\n");
2259 return -EINVAL;
2260 }
2261
2262 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2263 NULL, NULL, new_state, 0);
2264 return (!ret) ? count : -EINVAL;
2265 }
2266
2267 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2268
2269 /*
2270 * alua_access_status
2271 */
2272 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2273 struct t10_alua_tg_pt_gp *tg_pt_gp,
2274 char *page)
2275 {
2276 return sprintf(page, "%s\n",
2277 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2278 }
2279
2280 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2281 struct t10_alua_tg_pt_gp *tg_pt_gp,
2282 const char *page,
2283 size_t count)
2284 {
2285 unsigned long tmp;
2286 int new_status, ret;
2287
2288 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2289 pr_err("Unable to do set ALUA access status on non"
2290 " valid tg_pt_gp ID: %hu\n",
2291 tg_pt_gp->tg_pt_gp_valid_id);
2292 return -EINVAL;
2293 }
2294
2295 ret = kstrtoul(page, 0, &tmp);
2296 if (ret < 0) {
2297 pr_err("Unable to extract new ALUA access status"
2298 " from %s\n", page);
2299 return ret;
2300 }
2301 new_status = (int)tmp;
2302
2303 if ((new_status != ALUA_STATUS_NONE) &&
2304 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2305 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2306 pr_err("Illegal ALUA access status: 0x%02x\n",
2307 new_status);
2308 return -EINVAL;
2309 }
2310
2311 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2312 return count;
2313 }
2314
2315 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2316
2317 /*
2318 * alua_access_type
2319 */
2320 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2321 struct t10_alua_tg_pt_gp *tg_pt_gp,
2322 char *page)
2323 {
2324 return core_alua_show_access_type(tg_pt_gp, page);
2325 }
2326
2327 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2328 struct t10_alua_tg_pt_gp *tg_pt_gp,
2329 const char *page,
2330 size_t count)
2331 {
2332 return core_alua_store_access_type(tg_pt_gp, page, count);
2333 }
2334
2335 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2336
2337 /*
2338 * alua_supported_states
2339 */
2340
2341 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2342 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2343 struct t10_alua_tg_pt_gp *t, char *p) \
2344 { \
2345 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2346 }
2347
2348 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2349 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2350 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2351 { \
2352 unsigned long tmp; \
2353 int ret; \
2354 \
2355 if (!t->tg_pt_gp_valid_id) { \
2356 pr_err("Unable to do set ##_name ALUA state on non" \
2357 " valid tg_pt_gp ID: %hu\n", \
2358 t->tg_pt_gp_valid_id); \
2359 return -EINVAL; \
2360 } \
2361 \
2362 ret = kstrtoul(p, 0, &tmp); \
2363 if (ret < 0) { \
2364 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2365 return -EINVAL; \
2366 } \
2367 if (tmp > 1) { \
2368 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2369 return -EINVAL; \
2370 } \
2371 if (tmp) \
2372 t->_var |= _bit; \
2373 else \
2374 t->_var &= ~_bit; \
2375 \
2376 return c; \
2377 }
2378
2379 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2380 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2381 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2382 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2383 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2384
2385 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2386 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2387 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2388 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2389 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2390
2391 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2392 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2393 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2394 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2395 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2396
2397 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2398 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2399 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2400 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2401 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2402
2403 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2404 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2405 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2406 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2407 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2408
2409 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2410 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2411 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2412 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2413 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2414
2415 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2416 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2417 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2418 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2419 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2420
2421 /*
2422 * alua_write_metadata
2423 */
2424 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2425 struct t10_alua_tg_pt_gp *tg_pt_gp,
2426 char *page)
2427 {
2428 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2429 }
2430
2431 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2432 struct t10_alua_tg_pt_gp *tg_pt_gp,
2433 const char *page,
2434 size_t count)
2435 {
2436 unsigned long tmp;
2437 int ret;
2438
2439 ret = kstrtoul(page, 0, &tmp);
2440 if (ret < 0) {
2441 pr_err("Unable to extract alua_write_metadata\n");
2442 return ret;
2443 }
2444
2445 if ((tmp != 0) && (tmp != 1)) {
2446 pr_err("Illegal value for alua_write_metadata:"
2447 " %lu\n", tmp);
2448 return -EINVAL;
2449 }
2450 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2451
2452 return count;
2453 }
2454
2455 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2456
2457
2458
2459 /*
2460 * nonop_delay_msecs
2461 */
2462 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2463 struct t10_alua_tg_pt_gp *tg_pt_gp,
2464 char *page)
2465 {
2466 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2467
2468 }
2469
2470 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2471 struct t10_alua_tg_pt_gp *tg_pt_gp,
2472 const char *page,
2473 size_t count)
2474 {
2475 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2476 }
2477
2478 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2479
2480 /*
2481 * trans_delay_msecs
2482 */
2483 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2484 struct t10_alua_tg_pt_gp *tg_pt_gp,
2485 char *page)
2486 {
2487 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2488 }
2489
2490 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2491 struct t10_alua_tg_pt_gp *tg_pt_gp,
2492 const char *page,
2493 size_t count)
2494 {
2495 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2496 }
2497
2498 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2499
2500 /*
2501 * implicit_trans_secs
2502 */
2503 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2504 struct t10_alua_tg_pt_gp *tg_pt_gp,
2505 char *page)
2506 {
2507 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2508 }
2509
2510 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2511 struct t10_alua_tg_pt_gp *tg_pt_gp,
2512 const char *page,
2513 size_t count)
2514 {
2515 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2516 }
2517
2518 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2519
2520 /*
2521 * preferred
2522 */
2523
2524 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2525 struct t10_alua_tg_pt_gp *tg_pt_gp,
2526 char *page)
2527 {
2528 return core_alua_show_preferred_bit(tg_pt_gp, page);
2529 }
2530
2531 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2532 struct t10_alua_tg_pt_gp *tg_pt_gp,
2533 const char *page,
2534 size_t count)
2535 {
2536 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2537 }
2538
2539 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2540
2541 /*
2542 * tg_pt_gp_id
2543 */
2544 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2545 struct t10_alua_tg_pt_gp *tg_pt_gp,
2546 char *page)
2547 {
2548 if (!tg_pt_gp->tg_pt_gp_valid_id)
2549 return 0;
2550
2551 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2552 }
2553
2554 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2555 struct t10_alua_tg_pt_gp *tg_pt_gp,
2556 const char *page,
2557 size_t count)
2558 {
2559 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2560 unsigned long tg_pt_gp_id;
2561 int ret;
2562
2563 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2564 if (ret < 0) {
2565 pr_err("kstrtoul() returned %d for"
2566 " tg_pt_gp_id\n", ret);
2567 return ret;
2568 }
2569 if (tg_pt_gp_id > 0x0000ffff) {
2570 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2571 " 0x0000ffff\n", tg_pt_gp_id);
2572 return -EINVAL;
2573 }
2574
2575 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2576 if (ret < 0)
2577 return -EINVAL;
2578
2579 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2580 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2581 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2582 tg_pt_gp->tg_pt_gp_id);
2583
2584 return count;
2585 }
2586
2587 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2588
2589 /*
2590 * members
2591 */
2592 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2593 struct t10_alua_tg_pt_gp *tg_pt_gp,
2594 char *page)
2595 {
2596 struct se_port *port;
2597 struct se_portal_group *tpg;
2598 struct se_lun *lun;
2599 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2600 ssize_t len = 0, cur_len;
2601 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2602
2603 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2604
2605 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2606 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2607 tg_pt_gp_mem_list) {
2608 port = tg_pt_gp_mem->tg_pt;
2609 tpg = port->sep_tpg;
2610 lun = port->sep_lun;
2611
2612 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2613 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2614 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2615 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2616 config_item_name(&lun->lun_group.cg_item));
2617 cur_len++; /* Extra byte for NULL terminator */
2618
2619 if ((cur_len + len) > PAGE_SIZE) {
2620 pr_warn("Ran out of lu_gp_show_attr"
2621 "_members buffer\n");
2622 break;
2623 }
2624 memcpy(page+len, buf, cur_len);
2625 len += cur_len;
2626 }
2627 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2628
2629 return len;
2630 }
2631
2632 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2633
2634 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2635 tg_pt_gp_group);
2636
2637 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2638 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2639 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2640 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2641 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2642 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2643 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2644 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2645 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2646 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2647 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2648 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2649 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2650 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2651 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2652 &target_core_alua_tg_pt_gp_preferred.attr,
2653 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2654 &target_core_alua_tg_pt_gp_members.attr,
2655 NULL,
2656 };
2657
2658 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2659 {
2660 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2661 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2662
2663 core_alua_free_tg_pt_gp(tg_pt_gp);
2664 }
2665
2666 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2667 .release = target_core_alua_tg_pt_gp_release,
2668 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2669 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2670 };
2671
2672 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2673 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2674 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2675 .ct_owner = THIS_MODULE,
2676 };
2677
2678 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2679
2680 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2681
2682 static struct config_group *target_core_alua_create_tg_pt_gp(
2683 struct config_group *group,
2684 const char *name)
2685 {
2686 struct t10_alua *alua = container_of(group, struct t10_alua,
2687 alua_tg_pt_gps_group);
2688 struct t10_alua_tg_pt_gp *tg_pt_gp;
2689 struct config_group *alua_tg_pt_gp_cg = NULL;
2690 struct config_item *alua_tg_pt_gp_ci = NULL;
2691
2692 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2693 if (!tg_pt_gp)
2694 return NULL;
2695
2696 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2697 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2698
2699 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2700 &target_core_alua_tg_pt_gp_cit);
2701
2702 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2703 " Group: alua/tg_pt_gps/%s\n",
2704 config_item_name(alua_tg_pt_gp_ci));
2705
2706 return alua_tg_pt_gp_cg;
2707 }
2708
2709 static void target_core_alua_drop_tg_pt_gp(
2710 struct config_group *group,
2711 struct config_item *item)
2712 {
2713 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2714 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2715
2716 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2717 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2718 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2719 /*
2720 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2721 * -> target_core_alua_tg_pt_gp_release().
2722 */
2723 config_item_put(item);
2724 }
2725
2726 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2727 .make_group = &target_core_alua_create_tg_pt_gp,
2728 .drop_item = &target_core_alua_drop_tg_pt_gp,
2729 };
2730
2731 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2732 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2733 .ct_owner = THIS_MODULE,
2734 };
2735
2736 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2737
2738 /* Start functions for struct config_item_type target_core_alua_cit */
2739
2740 /*
2741 * target_core_alua_cit is a ConfigFS group that lives under
2742 * /sys/kernel/config/target/core/alua. There are default groups
2743 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2744 * target_core_alua_cit in target_core_init_configfs() below.
2745 */
2746 static struct config_item_type target_core_alua_cit = {
2747 .ct_item_ops = NULL,
2748 .ct_attrs = NULL,
2749 .ct_owner = THIS_MODULE,
2750 };
2751
2752 /* End functions for struct config_item_type target_core_alua_cit */
2753
2754 /* Start functions for struct config_item_type target_core_stat_cit */
2755
2756 static struct config_group *target_core_stat_mkdir(
2757 struct config_group *group,
2758 const char *name)
2759 {
2760 return ERR_PTR(-ENOSYS);
2761 }
2762
2763 static void target_core_stat_rmdir(
2764 struct config_group *group,
2765 struct config_item *item)
2766 {
2767 return;
2768 }
2769
2770 static struct configfs_group_operations target_core_stat_group_ops = {
2771 .make_group = &target_core_stat_mkdir,
2772 .drop_item = &target_core_stat_rmdir,
2773 };
2774
2775 static struct config_item_type target_core_stat_cit = {
2776 .ct_group_ops = &target_core_stat_group_ops,
2777 .ct_owner = THIS_MODULE,
2778 };
2779
2780 /* End functions for struct config_item_type target_core_stat_cit */
2781
2782 /* Start functions for struct config_item_type target_core_hba_cit */
2783
2784 static struct config_group *target_core_make_subdev(
2785 struct config_group *group,
2786 const char *name)
2787 {
2788 struct t10_alua_tg_pt_gp *tg_pt_gp;
2789 struct se_subsystem_api *t;
2790 struct config_item *hba_ci = &group->cg_item;
2791 struct se_hba *hba = item_to_hba(hba_ci);
2792 struct se_device *dev;
2793 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2794 struct config_group *dev_stat_grp = NULL;
2795 int errno = -ENOMEM, ret;
2796
2797 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2798 if (ret)
2799 return ERR_PTR(ret);
2800 /*
2801 * Locate the struct se_subsystem_api from parent's struct se_hba.
2802 */
2803 t = hba->transport;
2804
2805 dev = target_alloc_device(hba, name);
2806 if (!dev)
2807 goto out_unlock;
2808
2809 dev_cg = &dev->dev_group;
2810
2811 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2812 GFP_KERNEL);
2813 if (!dev_cg->default_groups)
2814 goto out_free_device;
2815
2816 config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
2817 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2818 &t->tb_cits.tb_dev_attrib_cit);
2819 config_group_init_type_name(&dev->dev_pr_group, "pr",
2820 &t->tb_cits.tb_dev_pr_cit);
2821 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2822 &t->tb_cits.tb_dev_wwn_cit);
2823 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2824 "alua", &target_core_alua_tg_pt_gps_cit);
2825 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2826 "statistics", &target_core_stat_cit);
2827
2828 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2829 dev_cg->default_groups[1] = &dev->dev_pr_group;
2830 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2831 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2832 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2833 dev_cg->default_groups[5] = NULL;
2834 /*
2835 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2836 */
2837 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2838 if (!tg_pt_gp)
2839 goto out_free_dev_cg_default_groups;
2840 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2841
2842 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2843 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2844 GFP_KERNEL);
2845 if (!tg_pt_gp_cg->default_groups) {
2846 pr_err("Unable to allocate tg_pt_gp_cg->"
2847 "default_groups\n");
2848 goto out_free_tg_pt_gp;
2849 }
2850
2851 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2852 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2853 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2854 tg_pt_gp_cg->default_groups[1] = NULL;
2855 /*
2856 * Add core/$HBA/$DEV/statistics/ default groups
2857 */
2858 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2859 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2860 GFP_KERNEL);
2861 if (!dev_stat_grp->default_groups) {
2862 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2863 goto out_free_tg_pt_gp_cg_default_groups;
2864 }
2865 target_stat_setup_dev_default_groups(dev);
2866
2867 mutex_unlock(&hba->hba_access_mutex);
2868 return dev_cg;
2869
2870 out_free_tg_pt_gp_cg_default_groups:
2871 kfree(tg_pt_gp_cg->default_groups);
2872 out_free_tg_pt_gp:
2873 core_alua_free_tg_pt_gp(tg_pt_gp);
2874 out_free_dev_cg_default_groups:
2875 kfree(dev_cg->default_groups);
2876 out_free_device:
2877 target_free_device(dev);
2878 out_unlock:
2879 mutex_unlock(&hba->hba_access_mutex);
2880 return ERR_PTR(errno);
2881 }
2882
2883 static void target_core_drop_subdev(
2884 struct config_group *group,
2885 struct config_item *item)
2886 {
2887 struct config_group *dev_cg = to_config_group(item);
2888 struct se_device *dev =
2889 container_of(dev_cg, struct se_device, dev_group);
2890 struct se_hba *hba;
2891 struct config_item *df_item;
2892 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2893 int i;
2894
2895 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2896
2897 mutex_lock(&hba->hba_access_mutex);
2898
2899 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2900 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2901 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2902 dev_stat_grp->default_groups[i] = NULL;
2903 config_item_put(df_item);
2904 }
2905 kfree(dev_stat_grp->default_groups);
2906
2907 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2908 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2909 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2910 tg_pt_gp_cg->default_groups[i] = NULL;
2911 config_item_put(df_item);
2912 }
2913 kfree(tg_pt_gp_cg->default_groups);
2914 /*
2915 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2916 * directly from target_core_alua_tg_pt_gp_release().
2917 */
2918 dev->t10_alua.default_tg_pt_gp = NULL;
2919
2920 for (i = 0; dev_cg->default_groups[i]; i++) {
2921 df_item = &dev_cg->default_groups[i]->cg_item;
2922 dev_cg->default_groups[i] = NULL;
2923 config_item_put(df_item);
2924 }
2925 /*
2926 * se_dev is released from target_core_dev_item_ops->release()
2927 */
2928 config_item_put(item);
2929 mutex_unlock(&hba->hba_access_mutex);
2930 }
2931
2932 static struct configfs_group_operations target_core_hba_group_ops = {
2933 .make_group = target_core_make_subdev,
2934 .drop_item = target_core_drop_subdev,
2935 };
2936
2937 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2938 #define SE_HBA_ATTR(_name, _mode) \
2939 static struct target_core_hba_attribute \
2940 target_core_hba_##_name = \
2941 __CONFIGFS_EATTR(_name, _mode, \
2942 target_core_hba_show_attr_##_name, \
2943 target_core_hba_store_attr_##_name);
2944
2945 #define SE_HBA_ATTR_RO(_name) \
2946 static struct target_core_hba_attribute \
2947 target_core_hba_##_name = \
2948 __CONFIGFS_EATTR_RO(_name, \
2949 target_core_hba_show_attr_##_name);
2950
2951 static ssize_t target_core_hba_show_attr_hba_info(
2952 struct se_hba *hba,
2953 char *page)
2954 {
2955 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2956 hba->hba_id, hba->transport->name,
2957 TARGET_CORE_CONFIGFS_VERSION);
2958 }
2959
2960 SE_HBA_ATTR_RO(hba_info);
2961
2962 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2963 char *page)
2964 {
2965 int hba_mode = 0;
2966
2967 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2968 hba_mode = 1;
2969
2970 return sprintf(page, "%d\n", hba_mode);
2971 }
2972
2973 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2974 const char *page, size_t count)
2975 {
2976 struct se_subsystem_api *transport = hba->transport;
2977 unsigned long mode_flag;
2978 int ret;
2979
2980 if (transport->pmode_enable_hba == NULL)
2981 return -EINVAL;
2982
2983 ret = kstrtoul(page, 0, &mode_flag);
2984 if (ret < 0) {
2985 pr_err("Unable to extract hba mode flag: %d\n", ret);
2986 return ret;
2987 }
2988
2989 if (hba->dev_count) {
2990 pr_err("Unable to set hba_mode with active devices\n");
2991 return -EINVAL;
2992 }
2993
2994 ret = transport->pmode_enable_hba(hba, mode_flag);
2995 if (ret < 0)
2996 return -EINVAL;
2997 if (ret > 0)
2998 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2999 else if (ret == 0)
3000 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3001
3002 return count;
3003 }
3004
3005 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3006
3007 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3008
3009 static void target_core_hba_release(struct config_item *item)
3010 {
3011 struct se_hba *hba = container_of(to_config_group(item),
3012 struct se_hba, hba_group);
3013 core_delete_hba(hba);
3014 }
3015
3016 static struct configfs_attribute *target_core_hba_attrs[] = {
3017 &target_core_hba_hba_info.attr,
3018 &target_core_hba_hba_mode.attr,
3019 NULL,
3020 };
3021
3022 static struct configfs_item_operations target_core_hba_item_ops = {
3023 .release = target_core_hba_release,
3024 .show_attribute = target_core_hba_attr_show,
3025 .store_attribute = target_core_hba_attr_store,
3026 };
3027
3028 static struct config_item_type target_core_hba_cit = {
3029 .ct_item_ops = &target_core_hba_item_ops,
3030 .ct_group_ops = &target_core_hba_group_ops,
3031 .ct_attrs = target_core_hba_attrs,
3032 .ct_owner = THIS_MODULE,
3033 };
3034
3035 static struct config_group *target_core_call_addhbatotarget(
3036 struct config_group *group,
3037 const char *name)
3038 {
3039 char *se_plugin_str, *str, *str2;
3040 struct se_hba *hba;
3041 char buf[TARGET_CORE_NAME_MAX_LEN];
3042 unsigned long plugin_dep_id = 0;
3043 int ret;
3044
3045 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3046 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3047 pr_err("Passed *name strlen(): %d exceeds"
3048 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3049 TARGET_CORE_NAME_MAX_LEN);
3050 return ERR_PTR(-ENAMETOOLONG);
3051 }
3052 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3053
3054 str = strstr(buf, "_");
3055 if (!str) {
3056 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3057 return ERR_PTR(-EINVAL);
3058 }
3059 se_plugin_str = buf;
3060 /*
3061 * Special case for subsystem plugins that have "_" in their names.
3062 * Namely rd_direct and rd_mcp..
3063 */
3064 str2 = strstr(str+1, "_");
3065 if (str2) {
3066 *str2 = '\0'; /* Terminate for *se_plugin_str */
3067 str2++; /* Skip to start of plugin dependent ID */
3068 str = str2;
3069 } else {
3070 *str = '\0'; /* Terminate for *se_plugin_str */
3071 str++; /* Skip to start of plugin dependent ID */
3072 }
3073
3074 ret = kstrtoul(str, 0, &plugin_dep_id);
3075 if (ret < 0) {
3076 pr_err("kstrtoul() returned %d for"
3077 " plugin_dep_id\n", ret);
3078 return ERR_PTR(ret);
3079 }
3080 /*
3081 * Load up TCM subsystem plugins if they have not already been loaded.
3082 */
3083 transport_subsystem_check_init();
3084
3085 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3086 if (IS_ERR(hba))
3087 return ERR_CAST(hba);
3088
3089 config_group_init_type_name(&hba->hba_group, name,
3090 &target_core_hba_cit);
3091
3092 return &hba->hba_group;
3093 }
3094
3095 static void target_core_call_delhbafromtarget(
3096 struct config_group *group,
3097 struct config_item *item)
3098 {
3099 /*
3100 * core_delete_hba() is called from target_core_hba_item_ops->release()
3101 * -> target_core_hba_release()
3102 */
3103 config_item_put(item);
3104 }
3105
3106 static struct configfs_group_operations target_core_group_ops = {
3107 .make_group = target_core_call_addhbatotarget,
3108 .drop_item = target_core_call_delhbafromtarget,
3109 };
3110
3111 static struct config_item_type target_core_cit = {
3112 .ct_item_ops = NULL,
3113 .ct_group_ops = &target_core_group_ops,
3114 .ct_attrs = NULL,
3115 .ct_owner = THIS_MODULE,
3116 };
3117
3118 /* Stop functions for struct config_item_type target_core_hba_cit */
3119
3120 void target_core_setup_sub_cits(struct se_subsystem_api *sa)
3121 {
3122 target_core_setup_dev_cit(sa);
3123 target_core_setup_dev_attrib_cit(sa);
3124 target_core_setup_dev_pr_cit(sa);
3125 target_core_setup_dev_wwn_cit(sa);
3126 }
3127 EXPORT_SYMBOL(target_core_setup_sub_cits);
3128
3129 static int __init target_core_init_configfs(void)
3130 {
3131 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3132 struct config_group *lu_gp_cg = NULL;
3133 struct configfs_subsystem *subsys;
3134 struct t10_alua_lu_gp *lu_gp;
3135 int ret;
3136
3137 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3138 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3139 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3140
3141 subsys = target_core_subsystem[0];
3142 config_group_init(&subsys->su_group);
3143 mutex_init(&subsys->su_mutex);
3144
3145 ret = init_se_kmem_caches();
3146 if (ret < 0)
3147 return ret;
3148 /*
3149 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3150 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3151 */
3152 target_cg = &subsys->su_group;
3153 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3154 GFP_KERNEL);
3155 if (!target_cg->default_groups) {
3156 pr_err("Unable to allocate target_cg->default_groups\n");
3157 ret = -ENOMEM;
3158 goto out_global;
3159 }
3160
3161 config_group_init_type_name(&target_core_hbagroup,
3162 "core", &target_core_cit);
3163 target_cg->default_groups[0] = &target_core_hbagroup;
3164 target_cg->default_groups[1] = NULL;
3165 /*
3166 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3167 */
3168 hba_cg = &target_core_hbagroup;
3169 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3170 GFP_KERNEL);
3171 if (!hba_cg->default_groups) {
3172 pr_err("Unable to allocate hba_cg->default_groups\n");
3173 ret = -ENOMEM;
3174 goto out_global;
3175 }
3176 config_group_init_type_name(&alua_group,
3177 "alua", &target_core_alua_cit);
3178 hba_cg->default_groups[0] = &alua_group;
3179 hba_cg->default_groups[1] = NULL;
3180 /*
3181 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3182 * groups under /sys/kernel/config/target/core/alua/
3183 */
3184 alua_cg = &alua_group;
3185 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3186 GFP_KERNEL);
3187 if (!alua_cg->default_groups) {
3188 pr_err("Unable to allocate alua_cg->default_groups\n");
3189 ret = -ENOMEM;
3190 goto out_global;
3191 }
3192
3193 config_group_init_type_name(&alua_lu_gps_group,
3194 "lu_gps", &target_core_alua_lu_gps_cit);
3195 alua_cg->default_groups[0] = &alua_lu_gps_group;
3196 alua_cg->default_groups[1] = NULL;
3197 /*
3198 * Add core/alua/lu_gps/default_lu_gp
3199 */
3200 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3201 if (IS_ERR(lu_gp)) {
3202 ret = -ENOMEM;
3203 goto out_global;
3204 }
3205
3206 lu_gp_cg = &alua_lu_gps_group;
3207 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3208 GFP_KERNEL);
3209 if (!lu_gp_cg->default_groups) {
3210 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3211 ret = -ENOMEM;
3212 goto out_global;
3213 }
3214
3215 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3216 &target_core_alua_lu_gp_cit);
3217 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3218 lu_gp_cg->default_groups[1] = NULL;
3219 default_lu_gp = lu_gp;
3220 /*
3221 * Register the target_core_mod subsystem with configfs.
3222 */
3223 ret = configfs_register_subsystem(subsys);
3224 if (ret < 0) {
3225 pr_err("Error %d while registering subsystem %s\n",
3226 ret, subsys->su_group.cg_item.ci_namebuf);
3227 goto out_global;
3228 }
3229 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3230 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3231 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3232 /*
3233 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3234 */
3235 ret = rd_module_init();
3236 if (ret < 0)
3237 goto out;
3238
3239 ret = core_dev_setup_virtual_lun0();
3240 if (ret < 0)
3241 goto out;
3242
3243 ret = target_xcopy_setup_pt();
3244 if (ret < 0)
3245 goto out;
3246
3247 return 0;
3248
3249 out:
3250 configfs_unregister_subsystem(subsys);
3251 core_dev_release_virtual_lun0();
3252 rd_module_exit();
3253 out_global:
3254 if (default_lu_gp) {
3255 core_alua_free_lu_gp(default_lu_gp);
3256 default_lu_gp = NULL;
3257 }
3258 if (lu_gp_cg)
3259 kfree(lu_gp_cg->default_groups);
3260 if (alua_cg)
3261 kfree(alua_cg->default_groups);
3262 if (hba_cg)
3263 kfree(hba_cg->default_groups);
3264 kfree(target_cg->default_groups);
3265 release_se_kmem_caches();
3266 return ret;
3267 }
3268
3269 static void __exit target_core_exit_configfs(void)
3270 {
3271 struct configfs_subsystem *subsys;
3272 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3273 struct config_item *item;
3274 int i;
3275
3276 subsys = target_core_subsystem[0];
3277
3278 lu_gp_cg = &alua_lu_gps_group;
3279 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3280 item = &lu_gp_cg->default_groups[i]->cg_item;
3281 lu_gp_cg->default_groups[i] = NULL;
3282 config_item_put(item);
3283 }
3284 kfree(lu_gp_cg->default_groups);
3285 lu_gp_cg->default_groups = NULL;
3286
3287 alua_cg = &alua_group;
3288 for (i = 0; alua_cg->default_groups[i]; i++) {
3289 item = &alua_cg->default_groups[i]->cg_item;
3290 alua_cg->default_groups[i] = NULL;
3291 config_item_put(item);
3292 }
3293 kfree(alua_cg->default_groups);
3294 alua_cg->default_groups = NULL;
3295
3296 hba_cg = &target_core_hbagroup;
3297 for (i = 0; hba_cg->default_groups[i]; i++) {
3298 item = &hba_cg->default_groups[i]->cg_item;
3299 hba_cg->default_groups[i] = NULL;
3300 config_item_put(item);
3301 }
3302 kfree(hba_cg->default_groups);
3303 hba_cg->default_groups = NULL;
3304 /*
3305 * We expect subsys->su_group.default_groups to be released
3306 * by configfs subsystem provider logic..
3307 */
3308 configfs_unregister_subsystem(subsys);
3309 kfree(subsys->su_group.default_groups);
3310
3311 core_alua_free_lu_gp(default_lu_gp);
3312 default_lu_gp = NULL;
3313
3314 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3315 " Infrastructure\n");
3316
3317 core_dev_release_virtual_lun0();
3318 rd_module_exit();
3319 target_xcopy_release_pt();
3320 release_se_kmem_caches();
3321 }
3322
3323 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3324 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3325 MODULE_LICENSE("GPL");
3326
3327 module_init(target_core_init_configfs);
3328 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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