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Merge tag 'md/3.17' of git://neil.brown.name/md
[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 extern struct t10_alua_lu_gp *default_lu_gp;
54
55 static LIST_HEAD(g_tf_list);
56 static DEFINE_MUTEX(g_tf_lock);
57
58 struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62 };
63
64 static struct config_group target_core_hbagroup;
65 static struct config_group alua_group;
66 static struct config_group alua_lu_gps_group;
67
68 static inline struct se_hba *
69 item_to_hba(struct config_item *item)
70 {
71 return container_of(to_config_group(item), struct se_hba, hba_group);
72 }
73
74 /*
75 * Attributes for /sys/kernel/config/target/
76 */
77 static ssize_t target_core_attr_show(struct config_item *item,
78 struct configfs_attribute *attr,
79 char *page)
80 {
81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
83 utsname()->sysname, utsname()->machine);
84 }
85
86 static struct configfs_item_operations target_core_fabric_item_ops = {
87 .show_attribute = target_core_attr_show,
88 };
89
90 static struct configfs_attribute target_core_item_attr_version = {
91 .ca_owner = THIS_MODULE,
92 .ca_name = "version",
93 .ca_mode = S_IRUGO,
94 };
95
96 static struct target_fabric_configfs *target_core_get_fabric(
97 const char *name)
98 {
99 struct target_fabric_configfs *tf;
100
101 if (!name)
102 return NULL;
103
104 mutex_lock(&g_tf_lock);
105 list_for_each_entry(tf, &g_tf_list, tf_list) {
106 if (!strcmp(tf->tf_name, name)) {
107 atomic_inc(&tf->tf_access_cnt);
108 mutex_unlock(&g_tf_lock);
109 return tf;
110 }
111 }
112 mutex_unlock(&g_tf_lock);
113
114 return NULL;
115 }
116
117 /*
118 * Called from struct target_core_group_ops->make_group()
119 */
120 static struct config_group *target_core_register_fabric(
121 struct config_group *group,
122 const char *name)
123 {
124 struct target_fabric_configfs *tf;
125 int ret;
126
127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
128 " %s\n", group, name);
129 /*
130 * Below are some hardcoded request_module() calls to automatically
131 * local fabric modules when the following is called:
132 *
133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134 *
135 * Note that this does not limit which TCM fabric module can be
136 * registered, but simply provids auto loading logic for modules with
137 * mkdir(2) system calls with known TCM fabric modules.
138 */
139 if (!strncmp(name, "iscsi", 5)) {
140 /*
141 * Automatically load the LIO Target fabric module when the
142 * following is called:
143 *
144 * mkdir -p $CONFIGFS/target/iscsi
145 */
146 ret = request_module("iscsi_target_mod");
147 if (ret < 0) {
148 pr_err("request_module() failed for"
149 " iscsi_target_mod.ko: %d\n", ret);
150 return ERR_PTR(-EINVAL);
151 }
152 } else if (!strncmp(name, "loopback", 8)) {
153 /*
154 * Automatically load the tcm_loop fabric module when the
155 * following is called:
156 *
157 * mkdir -p $CONFIGFS/target/loopback
158 */
159 ret = request_module("tcm_loop");
160 if (ret < 0) {
161 pr_err("request_module() failed for"
162 " tcm_loop.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 }
166
167 tf = target_core_get_fabric(name);
168 if (!tf) {
169 pr_err("target_core_get_fabric() failed for %s\n",
170 name);
171 return ERR_PTR(-EINVAL);
172 }
173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
174 " %s\n", tf->tf_name);
175 /*
176 * On a successful target_core_get_fabric() look, the returned
177 * struct target_fabric_configfs *tf will contain a usage reference.
178 */
179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
180 &tf->tf_cit_tmpl.tfc_wwn_cit);
181
182 tf->tf_group.default_groups = tf->tf_default_groups;
183 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
184 tf->tf_group.default_groups[1] = NULL;
185
186 config_group_init_type_name(&tf->tf_group, name,
187 &tf->tf_cit_tmpl.tfc_wwn_cit);
188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
189 &tf->tf_cit_tmpl.tfc_discovery_cit);
190
191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
192 " %s\n", tf->tf_group.cg_item.ci_name);
193 /*
194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
195 */
196 tf->tf_ops.tf_subsys = tf->tf_subsys;
197 tf->tf_fabric = &tf->tf_group.cg_item;
198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
199 " for %s\n", name);
200
201 return &tf->tf_group;
202 }
203
204 /*
205 * Called from struct target_core_group_ops->drop_item()
206 */
207 static void target_core_deregister_fabric(
208 struct config_group *group,
209 struct config_item *item)
210 {
211 struct target_fabric_configfs *tf = container_of(
212 to_config_group(item), struct target_fabric_configfs, tf_group);
213 struct config_group *tf_group;
214 struct config_item *df_item;
215 int i;
216
217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
218 " tf list\n", config_item_name(item));
219
220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
221 " %s\n", tf->tf_name);
222 atomic_dec(&tf->tf_access_cnt);
223
224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
225 " tf->tf_fabric for %s\n", tf->tf_name);
226 tf->tf_fabric = NULL;
227
228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
229 " %s\n", config_item_name(item));
230
231 tf_group = &tf->tf_group;
232 for (i = 0; tf_group->default_groups[i]; i++) {
233 df_item = &tf_group->default_groups[i]->cg_item;
234 tf_group->default_groups[i] = NULL;
235 config_item_put(df_item);
236 }
237 config_item_put(item);
238 }
239
240 static struct configfs_group_operations target_core_fabric_group_ops = {
241 .make_group = &target_core_register_fabric,
242 .drop_item = &target_core_deregister_fabric,
243 };
244
245 /*
246 * All item attributes appearing in /sys/kernel/target/ appear here.
247 */
248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249 &target_core_item_attr_version,
250 NULL,
251 };
252
253 /*
254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255 */
256 static struct config_item_type target_core_fabrics_item = {
257 .ct_item_ops = &target_core_fabric_item_ops,
258 .ct_group_ops = &target_core_fabric_group_ops,
259 .ct_attrs = target_core_fabric_item_attrs,
260 .ct_owner = THIS_MODULE,
261 };
262
263 static struct configfs_subsystem target_core_fabrics = {
264 .su_group = {
265 .cg_item = {
266 .ci_namebuf = "target",
267 .ci_type = &target_core_fabrics_item,
268 },
269 },
270 };
271
272 struct configfs_subsystem *target_core_subsystem[] = {
273 &target_core_fabrics,
274 NULL,
275 };
276
277 /*##############################################################################
278 // Start functions called by external Target Fabrics Modules
279 //############################################################################*/
280
281 /*
282 * First function called by fabric modules to:
283 *
284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285 * 2) Add struct target_fabric_configfs to g_tf_list
286 * 3) Return struct target_fabric_configfs to fabric module to be passed
287 * into target_fabric_configfs_register().
288 */
289 struct target_fabric_configfs *target_fabric_configfs_init(
290 struct module *fabric_mod,
291 const char *name)
292 {
293 struct target_fabric_configfs *tf;
294
295 if (!(name)) {
296 pr_err("Unable to locate passed fabric name\n");
297 return ERR_PTR(-EINVAL);
298 }
299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
301 "_NAME_SIZE\n", name);
302 return ERR_PTR(-EINVAL);
303 }
304
305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
306 if (!tf)
307 return ERR_PTR(-ENOMEM);
308
309 INIT_LIST_HEAD(&tf->tf_list);
310 atomic_set(&tf->tf_access_cnt, 0);
311 /*
312 * Setup the default generic struct config_item_type's (cits) in
313 * struct target_fabric_configfs->tf_cit_tmpl
314 */
315 tf->tf_module = fabric_mod;
316 target_fabric_setup_cits(tf);
317
318 tf->tf_subsys = target_core_subsystem[0];
319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
320
321 mutex_lock(&g_tf_lock);
322 list_add_tail(&tf->tf_list, &g_tf_list);
323 mutex_unlock(&g_tf_lock);
324
325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
326 ">>>>>>>>>>>>>>\n");
327 pr_debug("Initialized struct target_fabric_configfs: %p for"
328 " %s\n", tf, tf->tf_name);
329 return tf;
330 }
331 EXPORT_SYMBOL(target_fabric_configfs_init);
332
333 /*
334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335 */
336 void target_fabric_configfs_free(
337 struct target_fabric_configfs *tf)
338 {
339 mutex_lock(&g_tf_lock);
340 list_del(&tf->tf_list);
341 mutex_unlock(&g_tf_lock);
342
343 kfree(tf);
344 }
345 EXPORT_SYMBOL(target_fabric_configfs_free);
346
347 /*
348 * Perform a sanity check of the passed tf->tf_ops before completing
349 * TCM fabric module registration.
350 */
351 static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs *tf)
353 {
354 struct target_core_fabric_ops *tfo = &tf->tf_ops;
355
356 if (!tfo->get_fabric_name) {
357 pr_err("Missing tfo->get_fabric_name()\n");
358 return -EINVAL;
359 }
360 if (!tfo->get_fabric_proto_ident) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_get_default_depth) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_get_pr_transport_id) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_pr_transport_id_len) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
382 return -EINVAL;
383 }
384 if (!tfo->tpg_check_demo_mode) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
386 return -EINVAL;
387 }
388 if (!tfo->tpg_check_demo_mode_cache) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
390 return -EINVAL;
391 }
392 if (!tfo->tpg_check_demo_mode_write_protect) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
394 return -EINVAL;
395 }
396 if (!tfo->tpg_check_prod_mode_write_protect) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
398 return -EINVAL;
399 }
400 if (!tfo->tpg_alloc_fabric_acl) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
402 return -EINVAL;
403 }
404 if (!tfo->tpg_release_fabric_acl) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
406 return -EINVAL;
407 }
408 if (!tfo->tpg_get_inst_index) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
410 return -EINVAL;
411 }
412 if (!tfo->release_cmd) {
413 pr_err("Missing tfo->release_cmd()\n");
414 return -EINVAL;
415 }
416 if (!tfo->shutdown_session) {
417 pr_err("Missing tfo->shutdown_session()\n");
418 return -EINVAL;
419 }
420 if (!tfo->close_session) {
421 pr_err("Missing tfo->close_session()\n");
422 return -EINVAL;
423 }
424 if (!tfo->sess_get_index) {
425 pr_err("Missing tfo->sess_get_index()\n");
426 return -EINVAL;
427 }
428 if (!tfo->write_pending) {
429 pr_err("Missing tfo->write_pending()\n");
430 return -EINVAL;
431 }
432 if (!tfo->write_pending_status) {
433 pr_err("Missing tfo->write_pending_status()\n");
434 return -EINVAL;
435 }
436 if (!tfo->set_default_node_attributes) {
437 pr_err("Missing tfo->set_default_node_attributes()\n");
438 return -EINVAL;
439 }
440 if (!tfo->get_task_tag) {
441 pr_err("Missing tfo->get_task_tag()\n");
442 return -EINVAL;
443 }
444 if (!tfo->get_cmd_state) {
445 pr_err("Missing tfo->get_cmd_state()\n");
446 return -EINVAL;
447 }
448 if (!tfo->queue_data_in) {
449 pr_err("Missing tfo->queue_data_in()\n");
450 return -EINVAL;
451 }
452 if (!tfo->queue_status) {
453 pr_err("Missing tfo->queue_status()\n");
454 return -EINVAL;
455 }
456 if (!tfo->queue_tm_rsp) {
457 pr_err("Missing tfo->queue_tm_rsp()\n");
458 return -EINVAL;
459 }
460 if (!tfo->aborted_task) {
461 pr_err("Missing tfo->aborted_task()\n");
462 return -EINVAL;
463 }
464 /*
465 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
466 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
467 * target_core_fabric_configfs.c WWN+TPG group context code.
468 */
469 if (!tfo->fabric_make_wwn) {
470 pr_err("Missing tfo->fabric_make_wwn()\n");
471 return -EINVAL;
472 }
473 if (!tfo->fabric_drop_wwn) {
474 pr_err("Missing tfo->fabric_drop_wwn()\n");
475 return -EINVAL;
476 }
477 if (!tfo->fabric_make_tpg) {
478 pr_err("Missing tfo->fabric_make_tpg()\n");
479 return -EINVAL;
480 }
481 if (!tfo->fabric_drop_tpg) {
482 pr_err("Missing tfo->fabric_drop_tpg()\n");
483 return -EINVAL;
484 }
485
486 return 0;
487 }
488
489 /*
490 * Called 2nd from fabric module with returned parameter of
491 * struct target_fabric_configfs * from target_fabric_configfs_init().
492 *
493 * Upon a successful registration, the new fabric's struct config_item is
494 * return. Also, a pointer to this struct is set in the passed
495 * struct target_fabric_configfs.
496 */
497 int target_fabric_configfs_register(
498 struct target_fabric_configfs *tf)
499 {
500 int ret;
501
502 if (!tf) {
503 pr_err("Unable to locate target_fabric_configfs"
504 " pointer\n");
505 return -EINVAL;
506 }
507 if (!tf->tf_subsys) {
508 pr_err("Unable to target struct config_subsystem"
509 " pointer\n");
510 return -EINVAL;
511 }
512 ret = target_fabric_tf_ops_check(tf);
513 if (ret < 0)
514 return ret;
515
516 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
517 ">>>>>>>>>>\n");
518 return 0;
519 }
520 EXPORT_SYMBOL(target_fabric_configfs_register);
521
522 void target_fabric_configfs_deregister(
523 struct target_fabric_configfs *tf)
524 {
525 struct configfs_subsystem *su;
526
527 if (!tf) {
528 pr_err("Unable to locate passed target_fabric_"
529 "configfs\n");
530 return;
531 }
532 su = tf->tf_subsys;
533 if (!su) {
534 pr_err("Unable to locate passed tf->tf_subsys"
535 " pointer\n");
536 return;
537 }
538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
539 ">>>>>>>>>>>>\n");
540 mutex_lock(&g_tf_lock);
541 if (atomic_read(&tf->tf_access_cnt)) {
542 mutex_unlock(&g_tf_lock);
543 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
544 tf->tf_name);
545 BUG();
546 }
547 list_del(&tf->tf_list);
548 mutex_unlock(&g_tf_lock);
549
550 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
551 " %s\n", tf->tf_name);
552 tf->tf_module = NULL;
553 tf->tf_subsys = NULL;
554 kfree(tf);
555
556 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
557 ">>>>>\n");
558 }
559 EXPORT_SYMBOL(target_fabric_configfs_deregister);
560
561 /*##############################################################################
562 // Stop functions called by external Target Fabrics Modules
563 //############################################################################*/
564
565 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
566
567 #define DEF_DEV_ATTRIB_SHOW(_name) \
568 static ssize_t target_core_dev_show_attr_##_name( \
569 struct se_dev_attrib *da, \
570 char *page) \
571 { \
572 return snprintf(page, PAGE_SIZE, "%u\n", \
573 (u32)da->da_dev->dev_attrib._name); \
574 }
575
576 #define DEF_DEV_ATTRIB_STORE(_name) \
577 static ssize_t target_core_dev_store_attr_##_name( \
578 struct se_dev_attrib *da, \
579 const char *page, \
580 size_t count) \
581 { \
582 unsigned long val; \
583 int ret; \
584 \
585 ret = kstrtoul(page, 0, &val); \
586 if (ret < 0) { \
587 pr_err("kstrtoul() failed with" \
588 " ret: %d\n", ret); \
589 return -EINVAL; \
590 } \
591 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
592 \
593 return (!ret) ? count : -EINVAL; \
594 }
595
596 #define DEF_DEV_ATTRIB(_name) \
597 DEF_DEV_ATTRIB_SHOW(_name); \
598 DEF_DEV_ATTRIB_STORE(_name);
599
600 #define DEF_DEV_ATTRIB_RO(_name) \
601 DEF_DEV_ATTRIB_SHOW(_name);
602
603 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
604 #define SE_DEV_ATTR(_name, _mode) \
605 static struct target_core_dev_attrib_attribute \
606 target_core_dev_attrib_##_name = \
607 __CONFIGFS_EATTR(_name, _mode, \
608 target_core_dev_show_attr_##_name, \
609 target_core_dev_store_attr_##_name);
610
611 #define SE_DEV_ATTR_RO(_name); \
612 static struct target_core_dev_attrib_attribute \
613 target_core_dev_attrib_##_name = \
614 __CONFIGFS_EATTR_RO(_name, \
615 target_core_dev_show_attr_##_name);
616
617 DEF_DEV_ATTRIB(emulate_model_alias);
618 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
619
620 DEF_DEV_ATTRIB(emulate_dpo);
621 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
622
623 DEF_DEV_ATTRIB(emulate_fua_write);
624 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
625
626 DEF_DEV_ATTRIB(emulate_fua_read);
627 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
628
629 DEF_DEV_ATTRIB(emulate_write_cache);
630 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
631
632 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
633 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
634
635 DEF_DEV_ATTRIB(emulate_tas);
636 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
637
638 DEF_DEV_ATTRIB(emulate_tpu);
639 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
640
641 DEF_DEV_ATTRIB(emulate_tpws);
642 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
643
644 DEF_DEV_ATTRIB(emulate_caw);
645 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
646
647 DEF_DEV_ATTRIB(emulate_3pc);
648 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
649
650 DEF_DEV_ATTRIB(pi_prot_type);
651 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
652
653 DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
654 SE_DEV_ATTR_RO(hw_pi_prot_type);
655
656 DEF_DEV_ATTRIB(pi_prot_format);
657 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
658
659 DEF_DEV_ATTRIB(enforce_pr_isids);
660 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
661
662 DEF_DEV_ATTRIB(is_nonrot);
663 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
664
665 DEF_DEV_ATTRIB(emulate_rest_reord);
666 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
667
668 DEF_DEV_ATTRIB_RO(hw_block_size);
669 SE_DEV_ATTR_RO(hw_block_size);
670
671 DEF_DEV_ATTRIB(block_size);
672 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
673
674 DEF_DEV_ATTRIB_RO(hw_max_sectors);
675 SE_DEV_ATTR_RO(hw_max_sectors);
676
677 DEF_DEV_ATTRIB(fabric_max_sectors);
678 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
679
680 DEF_DEV_ATTRIB(optimal_sectors);
681 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
682
683 DEF_DEV_ATTRIB_RO(hw_queue_depth);
684 SE_DEV_ATTR_RO(hw_queue_depth);
685
686 DEF_DEV_ATTRIB(queue_depth);
687 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
688
689 DEF_DEV_ATTRIB(max_unmap_lba_count);
690 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
691
692 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
693 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
694
695 DEF_DEV_ATTRIB(unmap_granularity);
696 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
697
698 DEF_DEV_ATTRIB(unmap_granularity_alignment);
699 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
700
701 DEF_DEV_ATTRIB(max_write_same_len);
702 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
703
704 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
705
706 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
707 &target_core_dev_attrib_emulate_model_alias.attr,
708 &target_core_dev_attrib_emulate_dpo.attr,
709 &target_core_dev_attrib_emulate_fua_write.attr,
710 &target_core_dev_attrib_emulate_fua_read.attr,
711 &target_core_dev_attrib_emulate_write_cache.attr,
712 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
713 &target_core_dev_attrib_emulate_tas.attr,
714 &target_core_dev_attrib_emulate_tpu.attr,
715 &target_core_dev_attrib_emulate_tpws.attr,
716 &target_core_dev_attrib_emulate_caw.attr,
717 &target_core_dev_attrib_emulate_3pc.attr,
718 &target_core_dev_attrib_pi_prot_type.attr,
719 &target_core_dev_attrib_hw_pi_prot_type.attr,
720 &target_core_dev_attrib_pi_prot_format.attr,
721 &target_core_dev_attrib_enforce_pr_isids.attr,
722 &target_core_dev_attrib_is_nonrot.attr,
723 &target_core_dev_attrib_emulate_rest_reord.attr,
724 &target_core_dev_attrib_hw_block_size.attr,
725 &target_core_dev_attrib_block_size.attr,
726 &target_core_dev_attrib_hw_max_sectors.attr,
727 &target_core_dev_attrib_fabric_max_sectors.attr,
728 &target_core_dev_attrib_optimal_sectors.attr,
729 &target_core_dev_attrib_hw_queue_depth.attr,
730 &target_core_dev_attrib_queue_depth.attr,
731 &target_core_dev_attrib_max_unmap_lba_count.attr,
732 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
733 &target_core_dev_attrib_unmap_granularity.attr,
734 &target_core_dev_attrib_unmap_granularity_alignment.attr,
735 &target_core_dev_attrib_max_write_same_len.attr,
736 NULL,
737 };
738
739 static struct configfs_item_operations target_core_dev_attrib_ops = {
740 .show_attribute = target_core_dev_attrib_attr_show,
741 .store_attribute = target_core_dev_attrib_attr_store,
742 };
743
744 static struct config_item_type target_core_dev_attrib_cit = {
745 .ct_item_ops = &target_core_dev_attrib_ops,
746 .ct_attrs = target_core_dev_attrib_attrs,
747 .ct_owner = THIS_MODULE,
748 };
749
750 /* End functions for struct config_item_type target_core_dev_attrib_cit */
751
752 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
753
754 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
755 #define SE_DEV_WWN_ATTR(_name, _mode) \
756 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
757 __CONFIGFS_EATTR(_name, _mode, \
758 target_core_dev_wwn_show_attr_##_name, \
759 target_core_dev_wwn_store_attr_##_name);
760
761 #define SE_DEV_WWN_ATTR_RO(_name); \
762 do { \
763 static struct target_core_dev_wwn_attribute \
764 target_core_dev_wwn_##_name = \
765 __CONFIGFS_EATTR_RO(_name, \
766 target_core_dev_wwn_show_attr_##_name); \
767 } while (0);
768
769 /*
770 * VPD page 0x80 Unit serial
771 */
772 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
773 struct t10_wwn *t10_wwn,
774 char *page)
775 {
776 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
777 &t10_wwn->unit_serial[0]);
778 }
779
780 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
781 struct t10_wwn *t10_wwn,
782 const char *page,
783 size_t count)
784 {
785 struct se_device *dev = t10_wwn->t10_dev;
786 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
787
788 /*
789 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
790 * from the struct scsi_device level firmware, do not allow
791 * VPD Unit Serial to be emulated.
792 *
793 * Note this struct scsi_device could also be emulating VPD
794 * information from its drivers/scsi LLD. But for now we assume
795 * it is doing 'the right thing' wrt a world wide unique
796 * VPD Unit Serial Number that OS dependent multipath can depend on.
797 */
798 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
799 pr_err("Underlying SCSI device firmware provided VPD"
800 " Unit Serial, ignoring request\n");
801 return -EOPNOTSUPP;
802 }
803
804 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
805 pr_err("Emulated VPD Unit Serial exceeds"
806 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
807 return -EOVERFLOW;
808 }
809 /*
810 * Check to see if any active $FABRIC_MOD exports exist. If they
811 * do exist, fail here as changing this information on the fly
812 * (underneath the initiator side OS dependent multipath code)
813 * could cause negative effects.
814 */
815 if (dev->export_count) {
816 pr_err("Unable to set VPD Unit Serial while"
817 " active %d $FABRIC_MOD exports exist\n",
818 dev->export_count);
819 return -EINVAL;
820 }
821
822 /*
823 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
824 *
825 * Also, strip any newline added from the userspace
826 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
827 */
828 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
829 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
830 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
831 "%s", strstrip(buf));
832 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
833
834 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
835 " %s\n", dev->t10_wwn.unit_serial);
836
837 return count;
838 }
839
840 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
841
842 /*
843 * VPD page 0x83 Protocol Identifier
844 */
845 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
846 struct t10_wwn *t10_wwn,
847 char *page)
848 {
849 struct t10_vpd *vpd;
850 unsigned char buf[VPD_TMP_BUF_SIZE];
851 ssize_t len = 0;
852
853 memset(buf, 0, VPD_TMP_BUF_SIZE);
854
855 spin_lock(&t10_wwn->t10_vpd_lock);
856 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
857 if (!vpd->protocol_identifier_set)
858 continue;
859
860 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
861
862 if (len + strlen(buf) >= PAGE_SIZE)
863 break;
864
865 len += sprintf(page+len, "%s", buf);
866 }
867 spin_unlock(&t10_wwn->t10_vpd_lock);
868
869 return len;
870 }
871
872 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
873 struct t10_wwn *t10_wwn,
874 const char *page,
875 size_t count)
876 {
877 return -ENOSYS;
878 }
879
880 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
881
882 /*
883 * Generic wrapper for dumping VPD identifiers by association.
884 */
885 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
886 static ssize_t target_core_dev_wwn_show_attr_##_name( \
887 struct t10_wwn *t10_wwn, \
888 char *page) \
889 { \
890 struct t10_vpd *vpd; \
891 unsigned char buf[VPD_TMP_BUF_SIZE]; \
892 ssize_t len = 0; \
893 \
894 spin_lock(&t10_wwn->t10_vpd_lock); \
895 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
896 if (vpd->association != _assoc) \
897 continue; \
898 \
899 memset(buf, 0, VPD_TMP_BUF_SIZE); \
900 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
901 if (len + strlen(buf) >= PAGE_SIZE) \
902 break; \
903 len += sprintf(page+len, "%s", buf); \
904 \
905 memset(buf, 0, VPD_TMP_BUF_SIZE); \
906 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
907 if (len + strlen(buf) >= PAGE_SIZE) \
908 break; \
909 len += sprintf(page+len, "%s", buf); \
910 \
911 memset(buf, 0, VPD_TMP_BUF_SIZE); \
912 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
913 if (len + strlen(buf) >= PAGE_SIZE) \
914 break; \
915 len += sprintf(page+len, "%s", buf); \
916 } \
917 spin_unlock(&t10_wwn->t10_vpd_lock); \
918 \
919 return len; \
920 }
921
922 /*
923 * VPD page 0x83 Association: Logical Unit
924 */
925 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
926
927 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
928 struct t10_wwn *t10_wwn,
929 const char *page,
930 size_t count)
931 {
932 return -ENOSYS;
933 }
934
935 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
936
937 /*
938 * VPD page 0x83 Association: Target Port
939 */
940 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
941
942 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
943 struct t10_wwn *t10_wwn,
944 const char *page,
945 size_t count)
946 {
947 return -ENOSYS;
948 }
949
950 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
951
952 /*
953 * VPD page 0x83 Association: SCSI Target Device
954 */
955 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
956
957 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
958 struct t10_wwn *t10_wwn,
959 const char *page,
960 size_t count)
961 {
962 return -ENOSYS;
963 }
964
965 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
966
967 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
968
969 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
970 &target_core_dev_wwn_vpd_unit_serial.attr,
971 &target_core_dev_wwn_vpd_protocol_identifier.attr,
972 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
973 &target_core_dev_wwn_vpd_assoc_target_port.attr,
974 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
975 NULL,
976 };
977
978 static struct configfs_item_operations target_core_dev_wwn_ops = {
979 .show_attribute = target_core_dev_wwn_attr_show,
980 .store_attribute = target_core_dev_wwn_attr_store,
981 };
982
983 static struct config_item_type target_core_dev_wwn_cit = {
984 .ct_item_ops = &target_core_dev_wwn_ops,
985 .ct_attrs = target_core_dev_wwn_attrs,
986 .ct_owner = THIS_MODULE,
987 };
988
989 /* End functions for struct config_item_type target_core_dev_wwn_cit */
990
991 /* Start functions for struct config_item_type target_core_dev_pr_cit */
992
993 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
994 #define SE_DEV_PR_ATTR(_name, _mode) \
995 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
996 __CONFIGFS_EATTR(_name, _mode, \
997 target_core_dev_pr_show_attr_##_name, \
998 target_core_dev_pr_store_attr_##_name);
999
1000 #define SE_DEV_PR_ATTR_RO(_name); \
1001 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1002 __CONFIGFS_EATTR_RO(_name, \
1003 target_core_dev_pr_show_attr_##_name);
1004
1005 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1006 char *page)
1007 {
1008 struct se_node_acl *se_nacl;
1009 struct t10_pr_registration *pr_reg;
1010 char i_buf[PR_REG_ISID_ID_LEN];
1011
1012 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1013
1014 pr_reg = dev->dev_pr_res_holder;
1015 if (!pr_reg)
1016 return sprintf(page, "No SPC-3 Reservation holder\n");
1017
1018 se_nacl = pr_reg->pr_reg_nacl;
1019 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1020
1021 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1022 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1023 se_nacl->initiatorname, i_buf);
1024 }
1025
1026 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1027 char *page)
1028 {
1029 struct se_node_acl *se_nacl;
1030 ssize_t len;
1031
1032 se_nacl = dev->dev_reserved_node_acl;
1033 if (se_nacl) {
1034 len = sprintf(page,
1035 "SPC-2 Reservation: %s Initiator: %s\n",
1036 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1037 se_nacl->initiatorname);
1038 } else {
1039 len = sprintf(page, "No SPC-2 Reservation holder\n");
1040 }
1041 return len;
1042 }
1043
1044 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1045 char *page)
1046 {
1047 int ret;
1048
1049 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1050 return sprintf(page, "Passthrough\n");
1051
1052 spin_lock(&dev->dev_reservation_lock);
1053 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1054 ret = target_core_dev_pr_show_spc2_res(dev, page);
1055 else
1056 ret = target_core_dev_pr_show_spc3_res(dev, page);
1057 spin_unlock(&dev->dev_reservation_lock);
1058 return ret;
1059 }
1060
1061 SE_DEV_PR_ATTR_RO(res_holder);
1062
1063 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1064 struct se_device *dev, char *page)
1065 {
1066 ssize_t len = 0;
1067
1068 spin_lock(&dev->dev_reservation_lock);
1069 if (!dev->dev_pr_res_holder) {
1070 len = sprintf(page, "No SPC-3 Reservation holder\n");
1071 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1072 len = sprintf(page, "SPC-3 Reservation: All Target"
1073 " Ports registration\n");
1074 } else {
1075 len = sprintf(page, "SPC-3 Reservation: Single"
1076 " Target Port registration\n");
1077 }
1078
1079 spin_unlock(&dev->dev_reservation_lock);
1080 return len;
1081 }
1082
1083 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1084
1085 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1086 struct se_device *dev, char *page)
1087 {
1088 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1089 }
1090
1091 SE_DEV_PR_ATTR_RO(res_pr_generation);
1092
1093 /*
1094 * res_pr_holder_tg_port
1095 */
1096 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1097 struct se_device *dev, char *page)
1098 {
1099 struct se_node_acl *se_nacl;
1100 struct se_lun *lun;
1101 struct se_portal_group *se_tpg;
1102 struct t10_pr_registration *pr_reg;
1103 struct target_core_fabric_ops *tfo;
1104 ssize_t len = 0;
1105
1106 spin_lock(&dev->dev_reservation_lock);
1107 pr_reg = dev->dev_pr_res_holder;
1108 if (!pr_reg) {
1109 len = sprintf(page, "No SPC-3 Reservation holder\n");
1110 goto out_unlock;
1111 }
1112
1113 se_nacl = pr_reg->pr_reg_nacl;
1114 se_tpg = se_nacl->se_tpg;
1115 lun = pr_reg->pr_reg_tg_pt_lun;
1116 tfo = se_tpg->se_tpg_tfo;
1117
1118 len += sprintf(page+len, "SPC-3 Reservation: %s"
1119 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1120 tfo->tpg_get_wwn(se_tpg));
1121 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1122 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1123 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1124 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1125 tfo->get_fabric_name(), lun->unpacked_lun);
1126
1127 out_unlock:
1128 spin_unlock(&dev->dev_reservation_lock);
1129 return len;
1130 }
1131
1132 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1133
1134 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1135 struct se_device *dev, char *page)
1136 {
1137 struct target_core_fabric_ops *tfo;
1138 struct t10_pr_registration *pr_reg;
1139 unsigned char buf[384];
1140 char i_buf[PR_REG_ISID_ID_LEN];
1141 ssize_t len = 0;
1142 int reg_count = 0;
1143
1144 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1145
1146 spin_lock(&dev->t10_pr.registration_lock);
1147 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1148 pr_reg_list) {
1149
1150 memset(buf, 0, 384);
1151 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1152 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1153 core_pr_dump_initiator_port(pr_reg, i_buf,
1154 PR_REG_ISID_ID_LEN);
1155 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1156 tfo->get_fabric_name(),
1157 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1158 pr_reg->pr_res_generation);
1159
1160 if (len + strlen(buf) >= PAGE_SIZE)
1161 break;
1162
1163 len += sprintf(page+len, "%s", buf);
1164 reg_count++;
1165 }
1166 spin_unlock(&dev->t10_pr.registration_lock);
1167
1168 if (!reg_count)
1169 len += sprintf(page+len, "None\n");
1170
1171 return len;
1172 }
1173
1174 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1175
1176 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1177 struct se_device *dev, char *page)
1178 {
1179 struct t10_pr_registration *pr_reg;
1180 ssize_t len = 0;
1181
1182 spin_lock(&dev->dev_reservation_lock);
1183 pr_reg = dev->dev_pr_res_holder;
1184 if (pr_reg) {
1185 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1186 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1187 } else {
1188 len = sprintf(page, "No SPC-3 Reservation holder\n");
1189 }
1190
1191 spin_unlock(&dev->dev_reservation_lock);
1192 return len;
1193 }
1194
1195 SE_DEV_PR_ATTR_RO(res_pr_type);
1196
1197 static ssize_t target_core_dev_pr_show_attr_res_type(
1198 struct se_device *dev, char *page)
1199 {
1200 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1201 return sprintf(page, "SPC_PASSTHROUGH\n");
1202 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1203 return sprintf(page, "SPC2_RESERVATIONS\n");
1204 else
1205 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1206 }
1207
1208 SE_DEV_PR_ATTR_RO(res_type);
1209
1210 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1211 struct se_device *dev, char *page)
1212 {
1213 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1214 return 0;
1215
1216 return sprintf(page, "APTPL Bit Status: %s\n",
1217 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1218 }
1219
1220 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1221
1222 /*
1223 * res_aptpl_metadata
1224 */
1225 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1226 struct se_device *dev, char *page)
1227 {
1228 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1229 return 0;
1230
1231 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1232 }
1233
1234 enum {
1235 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1236 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1237 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1238 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1239 };
1240
1241 static match_table_t tokens = {
1242 {Opt_initiator_fabric, "initiator_fabric=%s"},
1243 {Opt_initiator_node, "initiator_node=%s"},
1244 {Opt_initiator_sid, "initiator_sid=%s"},
1245 {Opt_sa_res_key, "sa_res_key=%s"},
1246 {Opt_res_holder, "res_holder=%d"},
1247 {Opt_res_type, "res_type=%d"},
1248 {Opt_res_scope, "res_scope=%d"},
1249 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1250 {Opt_mapped_lun, "mapped_lun=%d"},
1251 {Opt_target_fabric, "target_fabric=%s"},
1252 {Opt_target_node, "target_node=%s"},
1253 {Opt_tpgt, "tpgt=%d"},
1254 {Opt_port_rtpi, "port_rtpi=%d"},
1255 {Opt_target_lun, "target_lun=%d"},
1256 {Opt_err, NULL}
1257 };
1258
1259 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1260 struct se_device *dev,
1261 const char *page,
1262 size_t count)
1263 {
1264 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1265 unsigned char *t_fabric = NULL, *t_port = NULL;
1266 char *orig, *ptr, *arg_p, *opts;
1267 substring_t args[MAX_OPT_ARGS];
1268 unsigned long long tmp_ll;
1269 u64 sa_res_key = 0;
1270 u32 mapped_lun = 0, target_lun = 0;
1271 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1272 u16 port_rpti = 0, tpgt = 0;
1273 u8 type = 0, scope;
1274
1275 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1276 return 0;
1277 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1278 return 0;
1279
1280 if (dev->export_count) {
1281 pr_debug("Unable to process APTPL metadata while"
1282 " active fabric exports exist\n");
1283 return -EINVAL;
1284 }
1285
1286 opts = kstrdup(page, GFP_KERNEL);
1287 if (!opts)
1288 return -ENOMEM;
1289
1290 orig = opts;
1291 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1292 if (!*ptr)
1293 continue;
1294
1295 token = match_token(ptr, tokens, args);
1296 switch (token) {
1297 case Opt_initiator_fabric:
1298 i_fabric = match_strdup(&args[0]);
1299 if (!i_fabric) {
1300 ret = -ENOMEM;
1301 goto out;
1302 }
1303 break;
1304 case Opt_initiator_node:
1305 i_port = match_strdup(&args[0]);
1306 if (!i_port) {
1307 ret = -ENOMEM;
1308 goto out;
1309 }
1310 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1311 pr_err("APTPL metadata initiator_node="
1312 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1313 PR_APTPL_MAX_IPORT_LEN);
1314 ret = -EINVAL;
1315 break;
1316 }
1317 break;
1318 case Opt_initiator_sid:
1319 isid = match_strdup(&args[0]);
1320 if (!isid) {
1321 ret = -ENOMEM;
1322 goto out;
1323 }
1324 if (strlen(isid) >= PR_REG_ISID_LEN) {
1325 pr_err("APTPL metadata initiator_isid"
1326 "= exceeds PR_REG_ISID_LEN: %d\n",
1327 PR_REG_ISID_LEN);
1328 ret = -EINVAL;
1329 break;
1330 }
1331 break;
1332 case Opt_sa_res_key:
1333 arg_p = match_strdup(&args[0]);
1334 if (!arg_p) {
1335 ret = -ENOMEM;
1336 goto out;
1337 }
1338 ret = kstrtoull(arg_p, 0, &tmp_ll);
1339 if (ret < 0) {
1340 pr_err("kstrtoull() failed for"
1341 " sa_res_key=\n");
1342 goto out;
1343 }
1344 sa_res_key = (u64)tmp_ll;
1345 break;
1346 /*
1347 * PR APTPL Metadata for Reservation
1348 */
1349 case Opt_res_holder:
1350 match_int(args, &arg);
1351 res_holder = arg;
1352 break;
1353 case Opt_res_type:
1354 match_int(args, &arg);
1355 type = (u8)arg;
1356 break;
1357 case Opt_res_scope:
1358 match_int(args, &arg);
1359 scope = (u8)arg;
1360 break;
1361 case Opt_res_all_tg_pt:
1362 match_int(args, &arg);
1363 all_tg_pt = (int)arg;
1364 break;
1365 case Opt_mapped_lun:
1366 match_int(args, &arg);
1367 mapped_lun = (u32)arg;
1368 break;
1369 /*
1370 * PR APTPL Metadata for Target Port
1371 */
1372 case Opt_target_fabric:
1373 t_fabric = match_strdup(&args[0]);
1374 if (!t_fabric) {
1375 ret = -ENOMEM;
1376 goto out;
1377 }
1378 break;
1379 case Opt_target_node:
1380 t_port = match_strdup(&args[0]);
1381 if (!t_port) {
1382 ret = -ENOMEM;
1383 goto out;
1384 }
1385 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1386 pr_err("APTPL metadata target_node="
1387 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1388 PR_APTPL_MAX_TPORT_LEN);
1389 ret = -EINVAL;
1390 break;
1391 }
1392 break;
1393 case Opt_tpgt:
1394 match_int(args, &arg);
1395 tpgt = (u16)arg;
1396 break;
1397 case Opt_port_rtpi:
1398 match_int(args, &arg);
1399 port_rpti = (u16)arg;
1400 break;
1401 case Opt_target_lun:
1402 match_int(args, &arg);
1403 target_lun = (u32)arg;
1404 break;
1405 default:
1406 break;
1407 }
1408 }
1409
1410 if (!i_port || !t_port || !sa_res_key) {
1411 pr_err("Illegal parameters for APTPL registration\n");
1412 ret = -EINVAL;
1413 goto out;
1414 }
1415
1416 if (res_holder && !(type)) {
1417 pr_err("Illegal PR type: 0x%02x for reservation"
1418 " holder\n", type);
1419 ret = -EINVAL;
1420 goto out;
1421 }
1422
1423 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1424 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1425 res_holder, all_tg_pt, type);
1426 out:
1427 kfree(i_fabric);
1428 kfree(i_port);
1429 kfree(isid);
1430 kfree(t_fabric);
1431 kfree(t_port);
1432 kfree(orig);
1433 return (ret == 0) ? count : ret;
1434 }
1435
1436 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1437
1438 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1439
1440 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1441 &target_core_dev_pr_res_holder.attr,
1442 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1443 &target_core_dev_pr_res_pr_generation.attr,
1444 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1445 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1446 &target_core_dev_pr_res_pr_type.attr,
1447 &target_core_dev_pr_res_type.attr,
1448 &target_core_dev_pr_res_aptpl_active.attr,
1449 &target_core_dev_pr_res_aptpl_metadata.attr,
1450 NULL,
1451 };
1452
1453 static struct configfs_item_operations target_core_dev_pr_ops = {
1454 .show_attribute = target_core_dev_pr_attr_show,
1455 .store_attribute = target_core_dev_pr_attr_store,
1456 };
1457
1458 static struct config_item_type target_core_dev_pr_cit = {
1459 .ct_item_ops = &target_core_dev_pr_ops,
1460 .ct_attrs = target_core_dev_pr_attrs,
1461 .ct_owner = THIS_MODULE,
1462 };
1463
1464 /* End functions for struct config_item_type target_core_dev_pr_cit */
1465
1466 /* Start functions for struct config_item_type target_core_dev_cit */
1467
1468 static ssize_t target_core_show_dev_info(void *p, char *page)
1469 {
1470 struct se_device *dev = p;
1471 struct se_subsystem_api *t = dev->transport;
1472 int bl = 0;
1473 ssize_t read_bytes = 0;
1474
1475 transport_dump_dev_state(dev, page, &bl);
1476 read_bytes += bl;
1477 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1478 return read_bytes;
1479 }
1480
1481 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1482 .attr = { .ca_owner = THIS_MODULE,
1483 .ca_name = "info",
1484 .ca_mode = S_IRUGO },
1485 .show = target_core_show_dev_info,
1486 .store = NULL,
1487 };
1488
1489 static ssize_t target_core_store_dev_control(
1490 void *p,
1491 const char *page,
1492 size_t count)
1493 {
1494 struct se_device *dev = p;
1495 struct se_subsystem_api *t = dev->transport;
1496
1497 return t->set_configfs_dev_params(dev, page, count);
1498 }
1499
1500 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1501 .attr = { .ca_owner = THIS_MODULE,
1502 .ca_name = "control",
1503 .ca_mode = S_IWUSR },
1504 .show = NULL,
1505 .store = target_core_store_dev_control,
1506 };
1507
1508 static ssize_t target_core_show_dev_alias(void *p, char *page)
1509 {
1510 struct se_device *dev = p;
1511
1512 if (!(dev->dev_flags & DF_USING_ALIAS))
1513 return 0;
1514
1515 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1516 }
1517
1518 static ssize_t target_core_store_dev_alias(
1519 void *p,
1520 const char *page,
1521 size_t count)
1522 {
1523 struct se_device *dev = p;
1524 struct se_hba *hba = dev->se_hba;
1525 ssize_t read_bytes;
1526
1527 if (count > (SE_DEV_ALIAS_LEN-1)) {
1528 pr_err("alias count: %d exceeds"
1529 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1530 SE_DEV_ALIAS_LEN-1);
1531 return -EINVAL;
1532 }
1533
1534 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1535 if (!read_bytes)
1536 return -EINVAL;
1537 if (dev->dev_alias[read_bytes - 1] == '\n')
1538 dev->dev_alias[read_bytes - 1] = '\0';
1539
1540 dev->dev_flags |= DF_USING_ALIAS;
1541
1542 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1543 config_item_name(&hba->hba_group.cg_item),
1544 config_item_name(&dev->dev_group.cg_item),
1545 dev->dev_alias);
1546
1547 return read_bytes;
1548 }
1549
1550 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1551 .attr = { .ca_owner = THIS_MODULE,
1552 .ca_name = "alias",
1553 .ca_mode = S_IRUGO | S_IWUSR },
1554 .show = target_core_show_dev_alias,
1555 .store = target_core_store_dev_alias,
1556 };
1557
1558 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1559 {
1560 struct se_device *dev = p;
1561
1562 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1563 return 0;
1564
1565 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1566 }
1567
1568 static ssize_t target_core_store_dev_udev_path(
1569 void *p,
1570 const char *page,
1571 size_t count)
1572 {
1573 struct se_device *dev = p;
1574 struct se_hba *hba = dev->se_hba;
1575 ssize_t read_bytes;
1576
1577 if (count > (SE_UDEV_PATH_LEN-1)) {
1578 pr_err("udev_path count: %d exceeds"
1579 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1580 SE_UDEV_PATH_LEN-1);
1581 return -EINVAL;
1582 }
1583
1584 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1585 "%s", page);
1586 if (!read_bytes)
1587 return -EINVAL;
1588 if (dev->udev_path[read_bytes - 1] == '\n')
1589 dev->udev_path[read_bytes - 1] = '\0';
1590
1591 dev->dev_flags |= DF_USING_UDEV_PATH;
1592
1593 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1594 config_item_name(&hba->hba_group.cg_item),
1595 config_item_name(&dev->dev_group.cg_item),
1596 dev->udev_path);
1597
1598 return read_bytes;
1599 }
1600
1601 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1602 .attr = { .ca_owner = THIS_MODULE,
1603 .ca_name = "udev_path",
1604 .ca_mode = S_IRUGO | S_IWUSR },
1605 .show = target_core_show_dev_udev_path,
1606 .store = target_core_store_dev_udev_path,
1607 };
1608
1609 static ssize_t target_core_show_dev_enable(void *p, char *page)
1610 {
1611 struct se_device *dev = p;
1612
1613 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1614 }
1615
1616 static ssize_t target_core_store_dev_enable(
1617 void *p,
1618 const char *page,
1619 size_t count)
1620 {
1621 struct se_device *dev = p;
1622 char *ptr;
1623 int ret;
1624
1625 ptr = strstr(page, "1");
1626 if (!ptr) {
1627 pr_err("For dev_enable ops, only valid value"
1628 " is \"1\"\n");
1629 return -EINVAL;
1630 }
1631
1632 ret = target_configure_device(dev);
1633 if (ret)
1634 return ret;
1635 return count;
1636 }
1637
1638 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1639 .attr = { .ca_owner = THIS_MODULE,
1640 .ca_name = "enable",
1641 .ca_mode = S_IRUGO | S_IWUSR },
1642 .show = target_core_show_dev_enable,
1643 .store = target_core_store_dev_enable,
1644 };
1645
1646 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1647 {
1648 struct se_device *dev = p;
1649 struct config_item *lu_ci;
1650 struct t10_alua_lu_gp *lu_gp;
1651 struct t10_alua_lu_gp_member *lu_gp_mem;
1652 ssize_t len = 0;
1653
1654 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1655 if (!lu_gp_mem)
1656 return 0;
1657
1658 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1659 lu_gp = lu_gp_mem->lu_gp;
1660 if (lu_gp) {
1661 lu_ci = &lu_gp->lu_gp_group.cg_item;
1662 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1663 config_item_name(lu_ci), lu_gp->lu_gp_id);
1664 }
1665 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1666
1667 return len;
1668 }
1669
1670 static ssize_t target_core_store_alua_lu_gp(
1671 void *p,
1672 const char *page,
1673 size_t count)
1674 {
1675 struct se_device *dev = p;
1676 struct se_hba *hba = dev->se_hba;
1677 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1678 struct t10_alua_lu_gp_member *lu_gp_mem;
1679 unsigned char buf[LU_GROUP_NAME_BUF];
1680 int move = 0;
1681
1682 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1683 if (!lu_gp_mem)
1684 return 0;
1685
1686 if (count > LU_GROUP_NAME_BUF) {
1687 pr_err("ALUA LU Group Alias too large!\n");
1688 return -EINVAL;
1689 }
1690 memset(buf, 0, LU_GROUP_NAME_BUF);
1691 memcpy(buf, page, count);
1692 /*
1693 * Any ALUA logical unit alias besides "NULL" means we will be
1694 * making a new group association.
1695 */
1696 if (strcmp(strstrip(buf), "NULL")) {
1697 /*
1698 * core_alua_get_lu_gp_by_name() will increment reference to
1699 * struct t10_alua_lu_gp. This reference is released with
1700 * core_alua_get_lu_gp_by_name below().
1701 */
1702 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1703 if (!lu_gp_new)
1704 return -ENODEV;
1705 }
1706
1707 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1708 lu_gp = lu_gp_mem->lu_gp;
1709 if (lu_gp) {
1710 /*
1711 * Clearing an existing lu_gp association, and replacing
1712 * with NULL
1713 */
1714 if (!lu_gp_new) {
1715 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1716 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1717 " %hu\n",
1718 config_item_name(&hba->hba_group.cg_item),
1719 config_item_name(&dev->dev_group.cg_item),
1720 config_item_name(&lu_gp->lu_gp_group.cg_item),
1721 lu_gp->lu_gp_id);
1722
1723 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1724 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1725
1726 return count;
1727 }
1728 /*
1729 * Removing existing association of lu_gp_mem with lu_gp
1730 */
1731 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1732 move = 1;
1733 }
1734 /*
1735 * Associate lu_gp_mem with lu_gp_new.
1736 */
1737 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1738 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1739
1740 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1741 " core/alua/lu_gps/%s, ID: %hu\n",
1742 (move) ? "Moving" : "Adding",
1743 config_item_name(&hba->hba_group.cg_item),
1744 config_item_name(&dev->dev_group.cg_item),
1745 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1746 lu_gp_new->lu_gp_id);
1747
1748 core_alua_put_lu_gp_from_name(lu_gp_new);
1749 return count;
1750 }
1751
1752 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1753 .attr = { .ca_owner = THIS_MODULE,
1754 .ca_name = "alua_lu_gp",
1755 .ca_mode = S_IRUGO | S_IWUSR },
1756 .show = target_core_show_alua_lu_gp,
1757 .store = target_core_store_alua_lu_gp,
1758 };
1759
1760 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1761 {
1762 struct se_device *dev = p;
1763 struct t10_alua_lba_map *map;
1764 struct t10_alua_lba_map_member *mem;
1765 char *b = page;
1766 int bl = 0;
1767 char state;
1768
1769 spin_lock(&dev->t10_alua.lba_map_lock);
1770 if (!list_empty(&dev->t10_alua.lba_map_list))
1771 bl += sprintf(b + bl, "%u %u\n",
1772 dev->t10_alua.lba_map_segment_size,
1773 dev->t10_alua.lba_map_segment_multiplier);
1774 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1775 bl += sprintf(b + bl, "%llu %llu",
1776 map->lba_map_first_lba, map->lba_map_last_lba);
1777 list_for_each_entry(mem, &map->lba_map_mem_list,
1778 lba_map_mem_list) {
1779 switch (mem->lba_map_mem_alua_state) {
1780 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1781 state = 'O';
1782 break;
1783 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1784 state = 'A';
1785 break;
1786 case ALUA_ACCESS_STATE_STANDBY:
1787 state = 'S';
1788 break;
1789 case ALUA_ACCESS_STATE_UNAVAILABLE:
1790 state = 'U';
1791 break;
1792 default:
1793 state = '.';
1794 break;
1795 }
1796 bl += sprintf(b + bl, " %d:%c",
1797 mem->lba_map_mem_alua_pg_id, state);
1798 }
1799 bl += sprintf(b + bl, "\n");
1800 }
1801 spin_unlock(&dev->t10_alua.lba_map_lock);
1802 return bl;
1803 }
1804
1805 static ssize_t target_core_store_dev_lba_map(
1806 void *p,
1807 const char *page,
1808 size_t count)
1809 {
1810 struct se_device *dev = p;
1811 struct t10_alua_lba_map *lba_map = NULL;
1812 struct list_head lba_list;
1813 char *map_entries, *ptr;
1814 char state;
1815 int pg_num = -1, pg;
1816 int ret = 0, num = 0, pg_id, alua_state;
1817 unsigned long start_lba = -1, end_lba = -1;
1818 unsigned long segment_size = -1, segment_mult = -1;
1819
1820 map_entries = kstrdup(page, GFP_KERNEL);
1821 if (!map_entries)
1822 return -ENOMEM;
1823
1824 INIT_LIST_HEAD(&lba_list);
1825 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1826 if (!*ptr)
1827 continue;
1828
1829 if (num == 0) {
1830 if (sscanf(ptr, "%lu %lu\n",
1831 &segment_size, &segment_mult) != 2) {
1832 pr_err("Invalid line %d\n", num);
1833 ret = -EINVAL;
1834 break;
1835 }
1836 num++;
1837 continue;
1838 }
1839 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1840 pr_err("Invalid line %d\n", num);
1841 ret = -EINVAL;
1842 break;
1843 }
1844 ptr = strchr(ptr, ' ');
1845 if (!ptr) {
1846 pr_err("Invalid line %d, missing end lba\n", num);
1847 ret = -EINVAL;
1848 break;
1849 }
1850 ptr++;
1851 ptr = strchr(ptr, ' ');
1852 if (!ptr) {
1853 pr_err("Invalid line %d, missing state definitions\n",
1854 num);
1855 ret = -EINVAL;
1856 break;
1857 }
1858 ptr++;
1859 lba_map = core_alua_allocate_lba_map(&lba_list,
1860 start_lba, end_lba);
1861 if (IS_ERR(lba_map)) {
1862 ret = PTR_ERR(lba_map);
1863 break;
1864 }
1865 pg = 0;
1866 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1867 switch (state) {
1868 case 'O':
1869 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1870 break;
1871 case 'A':
1872 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1873 break;
1874 case 'S':
1875 alua_state = ALUA_ACCESS_STATE_STANDBY;
1876 break;
1877 case 'U':
1878 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1879 break;
1880 default:
1881 pr_err("Invalid ALUA state '%c'\n", state);
1882 ret = -EINVAL;
1883 goto out;
1884 }
1885
1886 ret = core_alua_allocate_lba_map_mem(lba_map,
1887 pg_id, alua_state);
1888 if (ret) {
1889 pr_err("Invalid target descriptor %d:%c "
1890 "at line %d\n",
1891 pg_id, state, num);
1892 break;
1893 }
1894 pg++;
1895 ptr = strchr(ptr, ' ');
1896 if (ptr)
1897 ptr++;
1898 else
1899 break;
1900 }
1901 if (pg_num == -1)
1902 pg_num = pg;
1903 else if (pg != pg_num) {
1904 pr_err("Only %d from %d port groups definitions "
1905 "at line %d\n", pg, pg_num, num);
1906 ret = -EINVAL;
1907 break;
1908 }
1909 num++;
1910 }
1911 out:
1912 if (ret) {
1913 core_alua_free_lba_map(&lba_list);
1914 count = ret;
1915 } else
1916 core_alua_set_lba_map(dev, &lba_list,
1917 segment_size, segment_mult);
1918 kfree(map_entries);
1919 return count;
1920 }
1921
1922 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1923 .attr = { .ca_owner = THIS_MODULE,
1924 .ca_name = "lba_map",
1925 .ca_mode = S_IRUGO | S_IWUSR },
1926 .show = target_core_show_dev_lba_map,
1927 .store = target_core_store_dev_lba_map,
1928 };
1929
1930 static struct configfs_attribute *lio_core_dev_attrs[] = {
1931 &target_core_attr_dev_info.attr,
1932 &target_core_attr_dev_control.attr,
1933 &target_core_attr_dev_alias.attr,
1934 &target_core_attr_dev_udev_path.attr,
1935 &target_core_attr_dev_enable.attr,
1936 &target_core_attr_dev_alua_lu_gp.attr,
1937 &target_core_attr_dev_lba_map.attr,
1938 NULL,
1939 };
1940
1941 static void target_core_dev_release(struct config_item *item)
1942 {
1943 struct config_group *dev_cg = to_config_group(item);
1944 struct se_device *dev =
1945 container_of(dev_cg, struct se_device, dev_group);
1946
1947 kfree(dev_cg->default_groups);
1948 target_free_device(dev);
1949 }
1950
1951 static ssize_t target_core_dev_show(struct config_item *item,
1952 struct configfs_attribute *attr,
1953 char *page)
1954 {
1955 struct config_group *dev_cg = to_config_group(item);
1956 struct se_device *dev =
1957 container_of(dev_cg, struct se_device, dev_group);
1958 struct target_core_configfs_attribute *tc_attr = container_of(
1959 attr, struct target_core_configfs_attribute, attr);
1960
1961 if (!tc_attr->show)
1962 return -EINVAL;
1963
1964 return tc_attr->show(dev, page);
1965 }
1966
1967 static ssize_t target_core_dev_store(struct config_item *item,
1968 struct configfs_attribute *attr,
1969 const char *page, size_t count)
1970 {
1971 struct config_group *dev_cg = to_config_group(item);
1972 struct se_device *dev =
1973 container_of(dev_cg, struct se_device, dev_group);
1974 struct target_core_configfs_attribute *tc_attr = container_of(
1975 attr, struct target_core_configfs_attribute, attr);
1976
1977 if (!tc_attr->store)
1978 return -EINVAL;
1979
1980 return tc_attr->store(dev, page, count);
1981 }
1982
1983 static struct configfs_item_operations target_core_dev_item_ops = {
1984 .release = target_core_dev_release,
1985 .show_attribute = target_core_dev_show,
1986 .store_attribute = target_core_dev_store,
1987 };
1988
1989 static struct config_item_type target_core_dev_cit = {
1990 .ct_item_ops = &target_core_dev_item_ops,
1991 .ct_attrs = lio_core_dev_attrs,
1992 .ct_owner = THIS_MODULE,
1993 };
1994
1995 /* End functions for struct config_item_type target_core_dev_cit */
1996
1997 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1998
1999 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2000 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2001 static struct target_core_alua_lu_gp_attribute \
2002 target_core_alua_lu_gp_##_name = \
2003 __CONFIGFS_EATTR(_name, _mode, \
2004 target_core_alua_lu_gp_show_attr_##_name, \
2005 target_core_alua_lu_gp_store_attr_##_name);
2006
2007 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2008 static struct target_core_alua_lu_gp_attribute \
2009 target_core_alua_lu_gp_##_name = \
2010 __CONFIGFS_EATTR_RO(_name, \
2011 target_core_alua_lu_gp_show_attr_##_name);
2012
2013 /*
2014 * lu_gp_id
2015 */
2016 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2017 struct t10_alua_lu_gp *lu_gp,
2018 char *page)
2019 {
2020 if (!lu_gp->lu_gp_valid_id)
2021 return 0;
2022
2023 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2024 }
2025
2026 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2027 struct t10_alua_lu_gp *lu_gp,
2028 const char *page,
2029 size_t count)
2030 {
2031 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2032 unsigned long lu_gp_id;
2033 int ret;
2034
2035 ret = kstrtoul(page, 0, &lu_gp_id);
2036 if (ret < 0) {
2037 pr_err("kstrtoul() returned %d for"
2038 " lu_gp_id\n", ret);
2039 return ret;
2040 }
2041 if (lu_gp_id > 0x0000ffff) {
2042 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2043 " 0x0000ffff\n", lu_gp_id);
2044 return -EINVAL;
2045 }
2046
2047 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2048 if (ret < 0)
2049 return -EINVAL;
2050
2051 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2052 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2053 config_item_name(&alua_lu_gp_cg->cg_item),
2054 lu_gp->lu_gp_id);
2055
2056 return count;
2057 }
2058
2059 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2060
2061 /*
2062 * members
2063 */
2064 static ssize_t target_core_alua_lu_gp_show_attr_members(
2065 struct t10_alua_lu_gp *lu_gp,
2066 char *page)
2067 {
2068 struct se_device *dev;
2069 struct se_hba *hba;
2070 struct t10_alua_lu_gp_member *lu_gp_mem;
2071 ssize_t len = 0, cur_len;
2072 unsigned char buf[LU_GROUP_NAME_BUF];
2073
2074 memset(buf, 0, LU_GROUP_NAME_BUF);
2075
2076 spin_lock(&lu_gp->lu_gp_lock);
2077 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2078 dev = lu_gp_mem->lu_gp_mem_dev;
2079 hba = dev->se_hba;
2080
2081 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2082 config_item_name(&hba->hba_group.cg_item),
2083 config_item_name(&dev->dev_group.cg_item));
2084 cur_len++; /* Extra byte for NULL terminator */
2085
2086 if ((cur_len + len) > PAGE_SIZE) {
2087 pr_warn("Ran out of lu_gp_show_attr"
2088 "_members buffer\n");
2089 break;
2090 }
2091 memcpy(page+len, buf, cur_len);
2092 len += cur_len;
2093 }
2094 spin_unlock(&lu_gp->lu_gp_lock);
2095
2096 return len;
2097 }
2098
2099 SE_DEV_ALUA_LU_ATTR_RO(members);
2100
2101 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2102
2103 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2104 &target_core_alua_lu_gp_lu_gp_id.attr,
2105 &target_core_alua_lu_gp_members.attr,
2106 NULL,
2107 };
2108
2109 static void target_core_alua_lu_gp_release(struct config_item *item)
2110 {
2111 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2112 struct t10_alua_lu_gp, lu_gp_group);
2113
2114 core_alua_free_lu_gp(lu_gp);
2115 }
2116
2117 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2118 .release = target_core_alua_lu_gp_release,
2119 .show_attribute = target_core_alua_lu_gp_attr_show,
2120 .store_attribute = target_core_alua_lu_gp_attr_store,
2121 };
2122
2123 static struct config_item_type target_core_alua_lu_gp_cit = {
2124 .ct_item_ops = &target_core_alua_lu_gp_ops,
2125 .ct_attrs = target_core_alua_lu_gp_attrs,
2126 .ct_owner = THIS_MODULE,
2127 };
2128
2129 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2130
2131 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2132
2133 static struct config_group *target_core_alua_create_lu_gp(
2134 struct config_group *group,
2135 const char *name)
2136 {
2137 struct t10_alua_lu_gp *lu_gp;
2138 struct config_group *alua_lu_gp_cg = NULL;
2139 struct config_item *alua_lu_gp_ci = NULL;
2140
2141 lu_gp = core_alua_allocate_lu_gp(name, 0);
2142 if (IS_ERR(lu_gp))
2143 return NULL;
2144
2145 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2146 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2147
2148 config_group_init_type_name(alua_lu_gp_cg, name,
2149 &target_core_alua_lu_gp_cit);
2150
2151 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2152 " Group: core/alua/lu_gps/%s\n",
2153 config_item_name(alua_lu_gp_ci));
2154
2155 return alua_lu_gp_cg;
2156
2157 }
2158
2159 static void target_core_alua_drop_lu_gp(
2160 struct config_group *group,
2161 struct config_item *item)
2162 {
2163 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2164 struct t10_alua_lu_gp, lu_gp_group);
2165
2166 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2167 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2168 config_item_name(item), lu_gp->lu_gp_id);
2169 /*
2170 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2171 * -> target_core_alua_lu_gp_release()
2172 */
2173 config_item_put(item);
2174 }
2175
2176 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2177 .make_group = &target_core_alua_create_lu_gp,
2178 .drop_item = &target_core_alua_drop_lu_gp,
2179 };
2180
2181 static struct config_item_type target_core_alua_lu_gps_cit = {
2182 .ct_item_ops = NULL,
2183 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2184 .ct_owner = THIS_MODULE,
2185 };
2186
2187 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2188
2189 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2190
2191 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2192 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2193 static struct target_core_alua_tg_pt_gp_attribute \
2194 target_core_alua_tg_pt_gp_##_name = \
2195 __CONFIGFS_EATTR(_name, _mode, \
2196 target_core_alua_tg_pt_gp_show_attr_##_name, \
2197 target_core_alua_tg_pt_gp_store_attr_##_name);
2198
2199 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2200 static struct target_core_alua_tg_pt_gp_attribute \
2201 target_core_alua_tg_pt_gp_##_name = \
2202 __CONFIGFS_EATTR_RO(_name, \
2203 target_core_alua_tg_pt_gp_show_attr_##_name);
2204
2205 /*
2206 * alua_access_state
2207 */
2208 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2209 struct t10_alua_tg_pt_gp *tg_pt_gp,
2210 char *page)
2211 {
2212 return sprintf(page, "%d\n",
2213 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2214 }
2215
2216 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2217 struct t10_alua_tg_pt_gp *tg_pt_gp,
2218 const char *page,
2219 size_t count)
2220 {
2221 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2222 unsigned long tmp;
2223 int new_state, ret;
2224
2225 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2226 pr_err("Unable to do implicit ALUA on non valid"
2227 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2228 return -EINVAL;
2229 }
2230 if (!(dev->dev_flags & DF_CONFIGURED)) {
2231 pr_err("Unable to set alua_access_state while device is"
2232 " not configured\n");
2233 return -ENODEV;
2234 }
2235
2236 ret = kstrtoul(page, 0, &tmp);
2237 if (ret < 0) {
2238 pr_err("Unable to extract new ALUA access state from"
2239 " %s\n", page);
2240 return ret;
2241 }
2242 new_state = (int)tmp;
2243
2244 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2245 pr_err("Unable to process implicit configfs ALUA"
2246 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2247 return -EINVAL;
2248 }
2249 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2250 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2251 /* LBA DEPENDENT is only allowed with implicit ALUA */
2252 pr_err("Unable to process implicit configfs ALUA transition"
2253 " while explicit ALUA management is enabled\n");
2254 return -EINVAL;
2255 }
2256
2257 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2258 NULL, NULL, new_state, 0);
2259 return (!ret) ? count : -EINVAL;
2260 }
2261
2262 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2263
2264 /*
2265 * alua_access_status
2266 */
2267 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2268 struct t10_alua_tg_pt_gp *tg_pt_gp,
2269 char *page)
2270 {
2271 return sprintf(page, "%s\n",
2272 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2273 }
2274
2275 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2276 struct t10_alua_tg_pt_gp *tg_pt_gp,
2277 const char *page,
2278 size_t count)
2279 {
2280 unsigned long tmp;
2281 int new_status, ret;
2282
2283 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2284 pr_err("Unable to do set ALUA access status on non"
2285 " valid tg_pt_gp ID: %hu\n",
2286 tg_pt_gp->tg_pt_gp_valid_id);
2287 return -EINVAL;
2288 }
2289
2290 ret = kstrtoul(page, 0, &tmp);
2291 if (ret < 0) {
2292 pr_err("Unable to extract new ALUA access status"
2293 " from %s\n", page);
2294 return ret;
2295 }
2296 new_status = (int)tmp;
2297
2298 if ((new_status != ALUA_STATUS_NONE) &&
2299 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2300 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2301 pr_err("Illegal ALUA access status: 0x%02x\n",
2302 new_status);
2303 return -EINVAL;
2304 }
2305
2306 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2307 return count;
2308 }
2309
2310 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2311
2312 /*
2313 * alua_access_type
2314 */
2315 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2316 struct t10_alua_tg_pt_gp *tg_pt_gp,
2317 char *page)
2318 {
2319 return core_alua_show_access_type(tg_pt_gp, page);
2320 }
2321
2322 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2323 struct t10_alua_tg_pt_gp *tg_pt_gp,
2324 const char *page,
2325 size_t count)
2326 {
2327 return core_alua_store_access_type(tg_pt_gp, page, count);
2328 }
2329
2330 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2331
2332 /*
2333 * alua_supported_states
2334 */
2335
2336 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2337 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2338 struct t10_alua_tg_pt_gp *t, char *p) \
2339 { \
2340 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2341 }
2342
2343 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2344 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2345 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2346 { \
2347 unsigned long tmp; \
2348 int ret; \
2349 \
2350 if (!t->tg_pt_gp_valid_id) { \
2351 pr_err("Unable to do set ##_name ALUA state on non" \
2352 " valid tg_pt_gp ID: %hu\n", \
2353 t->tg_pt_gp_valid_id); \
2354 return -EINVAL; \
2355 } \
2356 \
2357 ret = kstrtoul(p, 0, &tmp); \
2358 if (ret < 0) { \
2359 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2360 return -EINVAL; \
2361 } \
2362 if (tmp > 1) { \
2363 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2364 return -EINVAL; \
2365 } \
2366 if (!tmp) \
2367 t->_var |= _bit; \
2368 else \
2369 t->_var &= ~_bit; \
2370 \
2371 return c; \
2372 }
2373
2374 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2375 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2376 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2377 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2378 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2379
2380 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2381 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2382 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2383 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2384 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2385
2386 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2387 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2388 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2389 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2390 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2391
2392 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2393 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2394 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2395 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2396 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2397
2398 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2399 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2400 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2401 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2402 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2403
2404 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2405 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2406 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2407 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2408 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2409
2410 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2411 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2412 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2413 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2414 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2415
2416 /*
2417 * alua_write_metadata
2418 */
2419 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2420 struct t10_alua_tg_pt_gp *tg_pt_gp,
2421 char *page)
2422 {
2423 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2424 }
2425
2426 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2427 struct t10_alua_tg_pt_gp *tg_pt_gp,
2428 const char *page,
2429 size_t count)
2430 {
2431 unsigned long tmp;
2432 int ret;
2433
2434 ret = kstrtoul(page, 0, &tmp);
2435 if (ret < 0) {
2436 pr_err("Unable to extract alua_write_metadata\n");
2437 return ret;
2438 }
2439
2440 if ((tmp != 0) && (tmp != 1)) {
2441 pr_err("Illegal value for alua_write_metadata:"
2442 " %lu\n", tmp);
2443 return -EINVAL;
2444 }
2445 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2446
2447 return count;
2448 }
2449
2450 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2451
2452
2453
2454 /*
2455 * nonop_delay_msecs
2456 */
2457 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2458 struct t10_alua_tg_pt_gp *tg_pt_gp,
2459 char *page)
2460 {
2461 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2462
2463 }
2464
2465 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2466 struct t10_alua_tg_pt_gp *tg_pt_gp,
2467 const char *page,
2468 size_t count)
2469 {
2470 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2471 }
2472
2473 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2474
2475 /*
2476 * trans_delay_msecs
2477 */
2478 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2479 struct t10_alua_tg_pt_gp *tg_pt_gp,
2480 char *page)
2481 {
2482 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2483 }
2484
2485 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2486 struct t10_alua_tg_pt_gp *tg_pt_gp,
2487 const char *page,
2488 size_t count)
2489 {
2490 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2491 }
2492
2493 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2494
2495 /*
2496 * implicit_trans_secs
2497 */
2498 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2499 struct t10_alua_tg_pt_gp *tg_pt_gp,
2500 char *page)
2501 {
2502 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2503 }
2504
2505 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2506 struct t10_alua_tg_pt_gp *tg_pt_gp,
2507 const char *page,
2508 size_t count)
2509 {
2510 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2511 }
2512
2513 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2514
2515 /*
2516 * preferred
2517 */
2518
2519 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2520 struct t10_alua_tg_pt_gp *tg_pt_gp,
2521 char *page)
2522 {
2523 return core_alua_show_preferred_bit(tg_pt_gp, page);
2524 }
2525
2526 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2527 struct t10_alua_tg_pt_gp *tg_pt_gp,
2528 const char *page,
2529 size_t count)
2530 {
2531 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2532 }
2533
2534 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2535
2536 /*
2537 * tg_pt_gp_id
2538 */
2539 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2540 struct t10_alua_tg_pt_gp *tg_pt_gp,
2541 char *page)
2542 {
2543 if (!tg_pt_gp->tg_pt_gp_valid_id)
2544 return 0;
2545
2546 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2547 }
2548
2549 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2550 struct t10_alua_tg_pt_gp *tg_pt_gp,
2551 const char *page,
2552 size_t count)
2553 {
2554 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2555 unsigned long tg_pt_gp_id;
2556 int ret;
2557
2558 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2559 if (ret < 0) {
2560 pr_err("kstrtoul() returned %d for"
2561 " tg_pt_gp_id\n", ret);
2562 return ret;
2563 }
2564 if (tg_pt_gp_id > 0x0000ffff) {
2565 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2566 " 0x0000ffff\n", tg_pt_gp_id);
2567 return -EINVAL;
2568 }
2569
2570 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2571 if (ret < 0)
2572 return -EINVAL;
2573
2574 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2575 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2576 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2577 tg_pt_gp->tg_pt_gp_id);
2578
2579 return count;
2580 }
2581
2582 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2583
2584 /*
2585 * members
2586 */
2587 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2588 struct t10_alua_tg_pt_gp *tg_pt_gp,
2589 char *page)
2590 {
2591 struct se_port *port;
2592 struct se_portal_group *tpg;
2593 struct se_lun *lun;
2594 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2595 ssize_t len = 0, cur_len;
2596 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2597
2598 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2599
2600 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2601 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2602 tg_pt_gp_mem_list) {
2603 port = tg_pt_gp_mem->tg_pt;
2604 tpg = port->sep_tpg;
2605 lun = port->sep_lun;
2606
2607 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2608 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2609 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2610 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2611 config_item_name(&lun->lun_group.cg_item));
2612 cur_len++; /* Extra byte for NULL terminator */
2613
2614 if ((cur_len + len) > PAGE_SIZE) {
2615 pr_warn("Ran out of lu_gp_show_attr"
2616 "_members buffer\n");
2617 break;
2618 }
2619 memcpy(page+len, buf, cur_len);
2620 len += cur_len;
2621 }
2622 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2623
2624 return len;
2625 }
2626
2627 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2628
2629 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2630 tg_pt_gp_group);
2631
2632 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2633 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2634 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2635 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2636 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2637 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2638 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2639 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2640 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2641 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2642 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2643 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2644 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2645 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2646 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2647 &target_core_alua_tg_pt_gp_preferred.attr,
2648 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2649 &target_core_alua_tg_pt_gp_members.attr,
2650 NULL,
2651 };
2652
2653 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2654 {
2655 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2656 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2657
2658 core_alua_free_tg_pt_gp(tg_pt_gp);
2659 }
2660
2661 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2662 .release = target_core_alua_tg_pt_gp_release,
2663 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2664 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2665 };
2666
2667 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2668 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2669 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2670 .ct_owner = THIS_MODULE,
2671 };
2672
2673 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2674
2675 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2676
2677 static struct config_group *target_core_alua_create_tg_pt_gp(
2678 struct config_group *group,
2679 const char *name)
2680 {
2681 struct t10_alua *alua = container_of(group, struct t10_alua,
2682 alua_tg_pt_gps_group);
2683 struct t10_alua_tg_pt_gp *tg_pt_gp;
2684 struct config_group *alua_tg_pt_gp_cg = NULL;
2685 struct config_item *alua_tg_pt_gp_ci = NULL;
2686
2687 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2688 if (!tg_pt_gp)
2689 return NULL;
2690
2691 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2692 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2693
2694 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2695 &target_core_alua_tg_pt_gp_cit);
2696
2697 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2698 " Group: alua/tg_pt_gps/%s\n",
2699 config_item_name(alua_tg_pt_gp_ci));
2700
2701 return alua_tg_pt_gp_cg;
2702 }
2703
2704 static void target_core_alua_drop_tg_pt_gp(
2705 struct config_group *group,
2706 struct config_item *item)
2707 {
2708 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2709 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2710
2711 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2712 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2713 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2714 /*
2715 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2716 * -> target_core_alua_tg_pt_gp_release().
2717 */
2718 config_item_put(item);
2719 }
2720
2721 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2722 .make_group = &target_core_alua_create_tg_pt_gp,
2723 .drop_item = &target_core_alua_drop_tg_pt_gp,
2724 };
2725
2726 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2727 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2728 .ct_owner = THIS_MODULE,
2729 };
2730
2731 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2732
2733 /* Start functions for struct config_item_type target_core_alua_cit */
2734
2735 /*
2736 * target_core_alua_cit is a ConfigFS group that lives under
2737 * /sys/kernel/config/target/core/alua. There are default groups
2738 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2739 * target_core_alua_cit in target_core_init_configfs() below.
2740 */
2741 static struct config_item_type target_core_alua_cit = {
2742 .ct_item_ops = NULL,
2743 .ct_attrs = NULL,
2744 .ct_owner = THIS_MODULE,
2745 };
2746
2747 /* End functions for struct config_item_type target_core_alua_cit */
2748
2749 /* Start functions for struct config_item_type target_core_stat_cit */
2750
2751 static struct config_group *target_core_stat_mkdir(
2752 struct config_group *group,
2753 const char *name)
2754 {
2755 return ERR_PTR(-ENOSYS);
2756 }
2757
2758 static void target_core_stat_rmdir(
2759 struct config_group *group,
2760 struct config_item *item)
2761 {
2762 return;
2763 }
2764
2765 static struct configfs_group_operations target_core_stat_group_ops = {
2766 .make_group = &target_core_stat_mkdir,
2767 .drop_item = &target_core_stat_rmdir,
2768 };
2769
2770 static struct config_item_type target_core_stat_cit = {
2771 .ct_group_ops = &target_core_stat_group_ops,
2772 .ct_owner = THIS_MODULE,
2773 };
2774
2775 /* End functions for struct config_item_type target_core_stat_cit */
2776
2777 /* Start functions for struct config_item_type target_core_hba_cit */
2778
2779 static struct config_group *target_core_make_subdev(
2780 struct config_group *group,
2781 const char *name)
2782 {
2783 struct t10_alua_tg_pt_gp *tg_pt_gp;
2784 struct se_subsystem_api *t;
2785 struct config_item *hba_ci = &group->cg_item;
2786 struct se_hba *hba = item_to_hba(hba_ci);
2787 struct se_device *dev;
2788 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2789 struct config_group *dev_stat_grp = NULL;
2790 int errno = -ENOMEM, ret;
2791
2792 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2793 if (ret)
2794 return ERR_PTR(ret);
2795 /*
2796 * Locate the struct se_subsystem_api from parent's struct se_hba.
2797 */
2798 t = hba->transport;
2799
2800 dev = target_alloc_device(hba, name);
2801 if (!dev)
2802 goto out_unlock;
2803
2804 dev_cg = &dev->dev_group;
2805
2806 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2807 GFP_KERNEL);
2808 if (!dev_cg->default_groups)
2809 goto out_free_device;
2810
2811 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2812 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2813 &target_core_dev_attrib_cit);
2814 config_group_init_type_name(&dev->dev_pr_group, "pr",
2815 &target_core_dev_pr_cit);
2816 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2817 &target_core_dev_wwn_cit);
2818 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2819 "alua", &target_core_alua_tg_pt_gps_cit);
2820 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2821 "statistics", &target_core_stat_cit);
2822
2823 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2824 dev_cg->default_groups[1] = &dev->dev_pr_group;
2825 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2826 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2827 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2828 dev_cg->default_groups[5] = NULL;
2829 /*
2830 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2831 */
2832 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2833 if (!tg_pt_gp)
2834 goto out_free_dev_cg_default_groups;
2835 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2836
2837 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2838 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2839 GFP_KERNEL);
2840 if (!tg_pt_gp_cg->default_groups) {
2841 pr_err("Unable to allocate tg_pt_gp_cg->"
2842 "default_groups\n");
2843 goto out_free_tg_pt_gp;
2844 }
2845
2846 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2847 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2848 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2849 tg_pt_gp_cg->default_groups[1] = NULL;
2850 /*
2851 * Add core/$HBA/$DEV/statistics/ default groups
2852 */
2853 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2854 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2855 GFP_KERNEL);
2856 if (!dev_stat_grp->default_groups) {
2857 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2858 goto out_free_tg_pt_gp_cg_default_groups;
2859 }
2860 target_stat_setup_dev_default_groups(dev);
2861
2862 mutex_unlock(&hba->hba_access_mutex);
2863 return dev_cg;
2864
2865 out_free_tg_pt_gp_cg_default_groups:
2866 kfree(tg_pt_gp_cg->default_groups);
2867 out_free_tg_pt_gp:
2868 core_alua_free_tg_pt_gp(tg_pt_gp);
2869 out_free_dev_cg_default_groups:
2870 kfree(dev_cg->default_groups);
2871 out_free_device:
2872 target_free_device(dev);
2873 out_unlock:
2874 mutex_unlock(&hba->hba_access_mutex);
2875 return ERR_PTR(errno);
2876 }
2877
2878 static void target_core_drop_subdev(
2879 struct config_group *group,
2880 struct config_item *item)
2881 {
2882 struct config_group *dev_cg = to_config_group(item);
2883 struct se_device *dev =
2884 container_of(dev_cg, struct se_device, dev_group);
2885 struct se_hba *hba;
2886 struct config_item *df_item;
2887 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2888 int i;
2889
2890 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2891
2892 mutex_lock(&hba->hba_access_mutex);
2893
2894 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2895 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2896 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2897 dev_stat_grp->default_groups[i] = NULL;
2898 config_item_put(df_item);
2899 }
2900 kfree(dev_stat_grp->default_groups);
2901
2902 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2903 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2904 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2905 tg_pt_gp_cg->default_groups[i] = NULL;
2906 config_item_put(df_item);
2907 }
2908 kfree(tg_pt_gp_cg->default_groups);
2909 /*
2910 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2911 * directly from target_core_alua_tg_pt_gp_release().
2912 */
2913 dev->t10_alua.default_tg_pt_gp = NULL;
2914
2915 for (i = 0; dev_cg->default_groups[i]; i++) {
2916 df_item = &dev_cg->default_groups[i]->cg_item;
2917 dev_cg->default_groups[i] = NULL;
2918 config_item_put(df_item);
2919 }
2920 /*
2921 * se_dev is released from target_core_dev_item_ops->release()
2922 */
2923 config_item_put(item);
2924 mutex_unlock(&hba->hba_access_mutex);
2925 }
2926
2927 static struct configfs_group_operations target_core_hba_group_ops = {
2928 .make_group = target_core_make_subdev,
2929 .drop_item = target_core_drop_subdev,
2930 };
2931
2932 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2933 #define SE_HBA_ATTR(_name, _mode) \
2934 static struct target_core_hba_attribute \
2935 target_core_hba_##_name = \
2936 __CONFIGFS_EATTR(_name, _mode, \
2937 target_core_hba_show_attr_##_name, \
2938 target_core_hba_store_attr_##_name);
2939
2940 #define SE_HBA_ATTR_RO(_name) \
2941 static struct target_core_hba_attribute \
2942 target_core_hba_##_name = \
2943 __CONFIGFS_EATTR_RO(_name, \
2944 target_core_hba_show_attr_##_name);
2945
2946 static ssize_t target_core_hba_show_attr_hba_info(
2947 struct se_hba *hba,
2948 char *page)
2949 {
2950 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2951 hba->hba_id, hba->transport->name,
2952 TARGET_CORE_CONFIGFS_VERSION);
2953 }
2954
2955 SE_HBA_ATTR_RO(hba_info);
2956
2957 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2958 char *page)
2959 {
2960 int hba_mode = 0;
2961
2962 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2963 hba_mode = 1;
2964
2965 return sprintf(page, "%d\n", hba_mode);
2966 }
2967
2968 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2969 const char *page, size_t count)
2970 {
2971 struct se_subsystem_api *transport = hba->transport;
2972 unsigned long mode_flag;
2973 int ret;
2974
2975 if (transport->pmode_enable_hba == NULL)
2976 return -EINVAL;
2977
2978 ret = kstrtoul(page, 0, &mode_flag);
2979 if (ret < 0) {
2980 pr_err("Unable to extract hba mode flag: %d\n", ret);
2981 return ret;
2982 }
2983
2984 if (hba->dev_count) {
2985 pr_err("Unable to set hba_mode with active devices\n");
2986 return -EINVAL;
2987 }
2988
2989 ret = transport->pmode_enable_hba(hba, mode_flag);
2990 if (ret < 0)
2991 return -EINVAL;
2992 if (ret > 0)
2993 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2994 else if (ret == 0)
2995 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2996
2997 return count;
2998 }
2999
3000 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3001
3002 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3003
3004 static void target_core_hba_release(struct config_item *item)
3005 {
3006 struct se_hba *hba = container_of(to_config_group(item),
3007 struct se_hba, hba_group);
3008 core_delete_hba(hba);
3009 }
3010
3011 static struct configfs_attribute *target_core_hba_attrs[] = {
3012 &target_core_hba_hba_info.attr,
3013 &target_core_hba_hba_mode.attr,
3014 NULL,
3015 };
3016
3017 static struct configfs_item_operations target_core_hba_item_ops = {
3018 .release = target_core_hba_release,
3019 .show_attribute = target_core_hba_attr_show,
3020 .store_attribute = target_core_hba_attr_store,
3021 };
3022
3023 static struct config_item_type target_core_hba_cit = {
3024 .ct_item_ops = &target_core_hba_item_ops,
3025 .ct_group_ops = &target_core_hba_group_ops,
3026 .ct_attrs = target_core_hba_attrs,
3027 .ct_owner = THIS_MODULE,
3028 };
3029
3030 static struct config_group *target_core_call_addhbatotarget(
3031 struct config_group *group,
3032 const char *name)
3033 {
3034 char *se_plugin_str, *str, *str2;
3035 struct se_hba *hba;
3036 char buf[TARGET_CORE_NAME_MAX_LEN];
3037 unsigned long plugin_dep_id = 0;
3038 int ret;
3039
3040 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3041 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3042 pr_err("Passed *name strlen(): %d exceeds"
3043 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3044 TARGET_CORE_NAME_MAX_LEN);
3045 return ERR_PTR(-ENAMETOOLONG);
3046 }
3047 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3048
3049 str = strstr(buf, "_");
3050 if (!str) {
3051 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3052 return ERR_PTR(-EINVAL);
3053 }
3054 se_plugin_str = buf;
3055 /*
3056 * Special case for subsystem plugins that have "_" in their names.
3057 * Namely rd_direct and rd_mcp..
3058 */
3059 str2 = strstr(str+1, "_");
3060 if (str2) {
3061 *str2 = '\0'; /* Terminate for *se_plugin_str */
3062 str2++; /* Skip to start of plugin dependent ID */
3063 str = str2;
3064 } else {
3065 *str = '\0'; /* Terminate for *se_plugin_str */
3066 str++; /* Skip to start of plugin dependent ID */
3067 }
3068
3069 ret = kstrtoul(str, 0, &plugin_dep_id);
3070 if (ret < 0) {
3071 pr_err("kstrtoul() returned %d for"
3072 " plugin_dep_id\n", ret);
3073 return ERR_PTR(ret);
3074 }
3075 /*
3076 * Load up TCM subsystem plugins if they have not already been loaded.
3077 */
3078 transport_subsystem_check_init();
3079
3080 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3081 if (IS_ERR(hba))
3082 return ERR_CAST(hba);
3083
3084 config_group_init_type_name(&hba->hba_group, name,
3085 &target_core_hba_cit);
3086
3087 return &hba->hba_group;
3088 }
3089
3090 static void target_core_call_delhbafromtarget(
3091 struct config_group *group,
3092 struct config_item *item)
3093 {
3094 /*
3095 * core_delete_hba() is called from target_core_hba_item_ops->release()
3096 * -> target_core_hba_release()
3097 */
3098 config_item_put(item);
3099 }
3100
3101 static struct configfs_group_operations target_core_group_ops = {
3102 .make_group = target_core_call_addhbatotarget,
3103 .drop_item = target_core_call_delhbafromtarget,
3104 };
3105
3106 static struct config_item_type target_core_cit = {
3107 .ct_item_ops = NULL,
3108 .ct_group_ops = &target_core_group_ops,
3109 .ct_attrs = NULL,
3110 .ct_owner = THIS_MODULE,
3111 };
3112
3113 /* Stop functions for struct config_item_type target_core_hba_cit */
3114
3115 static int __init target_core_init_configfs(void)
3116 {
3117 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3118 struct config_group *lu_gp_cg = NULL;
3119 struct configfs_subsystem *subsys;
3120 struct t10_alua_lu_gp *lu_gp;
3121 int ret;
3122
3123 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3124 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3125 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3126
3127 subsys = target_core_subsystem[0];
3128 config_group_init(&subsys->su_group);
3129 mutex_init(&subsys->su_mutex);
3130
3131 ret = init_se_kmem_caches();
3132 if (ret < 0)
3133 return ret;
3134 /*
3135 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3136 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3137 */
3138 target_cg = &subsys->su_group;
3139 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3140 GFP_KERNEL);
3141 if (!target_cg->default_groups) {
3142 pr_err("Unable to allocate target_cg->default_groups\n");
3143 ret = -ENOMEM;
3144 goto out_global;
3145 }
3146
3147 config_group_init_type_name(&target_core_hbagroup,
3148 "core", &target_core_cit);
3149 target_cg->default_groups[0] = &target_core_hbagroup;
3150 target_cg->default_groups[1] = NULL;
3151 /*
3152 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3153 */
3154 hba_cg = &target_core_hbagroup;
3155 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3156 GFP_KERNEL);
3157 if (!hba_cg->default_groups) {
3158 pr_err("Unable to allocate hba_cg->default_groups\n");
3159 ret = -ENOMEM;
3160 goto out_global;
3161 }
3162 config_group_init_type_name(&alua_group,
3163 "alua", &target_core_alua_cit);
3164 hba_cg->default_groups[0] = &alua_group;
3165 hba_cg->default_groups[1] = NULL;
3166 /*
3167 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3168 * groups under /sys/kernel/config/target/core/alua/
3169 */
3170 alua_cg = &alua_group;
3171 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3172 GFP_KERNEL);
3173 if (!alua_cg->default_groups) {
3174 pr_err("Unable to allocate alua_cg->default_groups\n");
3175 ret = -ENOMEM;
3176 goto out_global;
3177 }
3178
3179 config_group_init_type_name(&alua_lu_gps_group,
3180 "lu_gps", &target_core_alua_lu_gps_cit);
3181 alua_cg->default_groups[0] = &alua_lu_gps_group;
3182 alua_cg->default_groups[1] = NULL;
3183 /*
3184 * Add core/alua/lu_gps/default_lu_gp
3185 */
3186 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3187 if (IS_ERR(lu_gp)) {
3188 ret = -ENOMEM;
3189 goto out_global;
3190 }
3191
3192 lu_gp_cg = &alua_lu_gps_group;
3193 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3194 GFP_KERNEL);
3195 if (!lu_gp_cg->default_groups) {
3196 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3197 ret = -ENOMEM;
3198 goto out_global;
3199 }
3200
3201 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3202 &target_core_alua_lu_gp_cit);
3203 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3204 lu_gp_cg->default_groups[1] = NULL;
3205 default_lu_gp = lu_gp;
3206 /*
3207 * Register the target_core_mod subsystem with configfs.
3208 */
3209 ret = configfs_register_subsystem(subsys);
3210 if (ret < 0) {
3211 pr_err("Error %d while registering subsystem %s\n",
3212 ret, subsys->su_group.cg_item.ci_namebuf);
3213 goto out_global;
3214 }
3215 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3216 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3217 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3218 /*
3219 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3220 */
3221 ret = rd_module_init();
3222 if (ret < 0)
3223 goto out;
3224
3225 ret = core_dev_setup_virtual_lun0();
3226 if (ret < 0)
3227 goto out;
3228
3229 ret = target_xcopy_setup_pt();
3230 if (ret < 0)
3231 goto out;
3232
3233 return 0;
3234
3235 out:
3236 configfs_unregister_subsystem(subsys);
3237 core_dev_release_virtual_lun0();
3238 rd_module_exit();
3239 out_global:
3240 if (default_lu_gp) {
3241 core_alua_free_lu_gp(default_lu_gp);
3242 default_lu_gp = NULL;
3243 }
3244 if (lu_gp_cg)
3245 kfree(lu_gp_cg->default_groups);
3246 if (alua_cg)
3247 kfree(alua_cg->default_groups);
3248 if (hba_cg)
3249 kfree(hba_cg->default_groups);
3250 kfree(target_cg->default_groups);
3251 release_se_kmem_caches();
3252 return ret;
3253 }
3254
3255 static void __exit target_core_exit_configfs(void)
3256 {
3257 struct configfs_subsystem *subsys;
3258 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3259 struct config_item *item;
3260 int i;
3261
3262 subsys = target_core_subsystem[0];
3263
3264 lu_gp_cg = &alua_lu_gps_group;
3265 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3266 item = &lu_gp_cg->default_groups[i]->cg_item;
3267 lu_gp_cg->default_groups[i] = NULL;
3268 config_item_put(item);
3269 }
3270 kfree(lu_gp_cg->default_groups);
3271 lu_gp_cg->default_groups = NULL;
3272
3273 alua_cg = &alua_group;
3274 for (i = 0; alua_cg->default_groups[i]; i++) {
3275 item = &alua_cg->default_groups[i]->cg_item;
3276 alua_cg->default_groups[i] = NULL;
3277 config_item_put(item);
3278 }
3279 kfree(alua_cg->default_groups);
3280 alua_cg->default_groups = NULL;
3281
3282 hba_cg = &target_core_hbagroup;
3283 for (i = 0; hba_cg->default_groups[i]; i++) {
3284 item = &hba_cg->default_groups[i]->cg_item;
3285 hba_cg->default_groups[i] = NULL;
3286 config_item_put(item);
3287 }
3288 kfree(hba_cg->default_groups);
3289 hba_cg->default_groups = NULL;
3290 /*
3291 * We expect subsys->su_group.default_groups to be released
3292 * by configfs subsystem provider logic..
3293 */
3294 configfs_unregister_subsystem(subsys);
3295 kfree(subsys->su_group.default_groups);
3296
3297 core_alua_free_lu_gp(default_lu_gp);
3298 default_lu_gp = NULL;
3299
3300 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3301 " Infrastructure\n");
3302
3303 core_dev_release_virtual_lun0();
3304 rd_module_exit();
3305 target_xcopy_release_pt();
3306 release_se_kmem_caches();
3307 }
3308
3309 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3310 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3311 MODULE_LICENSE("GPL");
3312
3313 module_init(target_core_init_configfs);
3314 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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