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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / target / target_core_configfs.c
blobf0e85b1196926383149854c8e373104f1344ea59
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 /*
461 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
462 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
463 * target_core_fabric_configfs.c WWN+TPG group context code.
464 */
465 if (!tfo->fabric_make_wwn) {
466 pr_err("Missing tfo->fabric_make_wwn()\n");
467 return -EINVAL;
468 }
469 if (!tfo->fabric_drop_wwn) {
470 pr_err("Missing tfo->fabric_drop_wwn()\n");
471 return -EINVAL;
472 }
473 if (!tfo->fabric_make_tpg) {
474 pr_err("Missing tfo->fabric_make_tpg()\n");
475 return -EINVAL;
476 }
477 if (!tfo->fabric_drop_tpg) {
478 pr_err("Missing tfo->fabric_drop_tpg()\n");
479 return -EINVAL;
480 }
481
482 return 0;
483 }
484
485 /*
486 * Called 2nd from fabric module with returned parameter of
487 * struct target_fabric_configfs * from target_fabric_configfs_init().
488 *
489 * Upon a successful registration, the new fabric's struct config_item is
490 * return. Also, a pointer to this struct is set in the passed
491 * struct target_fabric_configfs.
492 */
493 int target_fabric_configfs_register(
494 struct target_fabric_configfs *tf)
495 {
496 int ret;
497
498 if (!tf) {
499 pr_err("Unable to locate target_fabric_configfs"
500 " pointer\n");
501 return -EINVAL;
502 }
503 if (!tf->tf_subsys) {
504 pr_err("Unable to target struct config_subsystem"
505 " pointer\n");
506 return -EINVAL;
507 }
508 ret = target_fabric_tf_ops_check(tf);
509 if (ret < 0)
510 return ret;
511
512 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
513 ">>>>>>>>>>\n");
514 return 0;
515 }
516 EXPORT_SYMBOL(target_fabric_configfs_register);
517
518 void target_fabric_configfs_deregister(
519 struct target_fabric_configfs *tf)
520 {
521 struct configfs_subsystem *su;
522
523 if (!tf) {
524 pr_err("Unable to locate passed target_fabric_"
525 "configfs\n");
526 return;
527 }
528 su = tf->tf_subsys;
529 if (!su) {
530 pr_err("Unable to locate passed tf->tf_subsys"
531 " pointer\n");
532 return;
533 }
534 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
535 ">>>>>>>>>>>>\n");
536 mutex_lock(&g_tf_lock);
537 if (atomic_read(&tf->tf_access_cnt)) {
538 mutex_unlock(&g_tf_lock);
539 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
540 tf->tf_name);
541 BUG();
542 }
543 list_del(&tf->tf_list);
544 mutex_unlock(&g_tf_lock);
545
546 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
547 " %s\n", tf->tf_name);
548 tf->tf_module = NULL;
549 tf->tf_subsys = NULL;
550 kfree(tf);
551
552 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
553 ">>>>>\n");
554 }
555 EXPORT_SYMBOL(target_fabric_configfs_deregister);
556
557 /*##############################################################################
558 // Stop functions called by external Target Fabrics Modules
559 //############################################################################*/
560
561 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
562
563 #define DEF_DEV_ATTRIB_SHOW(_name) \
564 static ssize_t target_core_dev_show_attr_##_name( \
565 struct se_dev_attrib *da, \
566 char *page) \
567 { \
568 return snprintf(page, PAGE_SIZE, "%u\n", \
569 (u32)da->da_dev->dev_attrib._name); \
570 }
571
572 #define DEF_DEV_ATTRIB_STORE(_name) \
573 static ssize_t target_core_dev_store_attr_##_name( \
574 struct se_dev_attrib *da, \
575 const char *page, \
576 size_t count) \
577 { \
578 unsigned long val; \
579 int ret; \
580 \
581 ret = kstrtoul(page, 0, &val); \
582 if (ret < 0) { \
583 pr_err("kstrtoul() failed with" \
584 " ret: %d\n", ret); \
585 return -EINVAL; \
586 } \
587 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
588 \
589 return (!ret) ? count : -EINVAL; \
590 }
591
592 #define DEF_DEV_ATTRIB(_name) \
593 DEF_DEV_ATTRIB_SHOW(_name); \
594 DEF_DEV_ATTRIB_STORE(_name);
595
596 #define DEF_DEV_ATTRIB_RO(_name) \
597 DEF_DEV_ATTRIB_SHOW(_name);
598
599 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
600 #define SE_DEV_ATTR(_name, _mode) \
601 static struct target_core_dev_attrib_attribute \
602 target_core_dev_attrib_##_name = \
603 __CONFIGFS_EATTR(_name, _mode, \
604 target_core_dev_show_attr_##_name, \
605 target_core_dev_store_attr_##_name);
606
607 #define SE_DEV_ATTR_RO(_name); \
608 static struct target_core_dev_attrib_attribute \
609 target_core_dev_attrib_##_name = \
610 __CONFIGFS_EATTR_RO(_name, \
611 target_core_dev_show_attr_##_name);
612
613 DEF_DEV_ATTRIB(emulate_model_alias);
614 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
615
616 DEF_DEV_ATTRIB(emulate_dpo);
617 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
618
619 DEF_DEV_ATTRIB(emulate_fua_write);
620 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
621
622 DEF_DEV_ATTRIB(emulate_fua_read);
623 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
624
625 DEF_DEV_ATTRIB(emulate_write_cache);
626 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
627
628 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
629 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
630
631 DEF_DEV_ATTRIB(emulate_tas);
632 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
633
634 DEF_DEV_ATTRIB(emulate_tpu);
635 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
636
637 DEF_DEV_ATTRIB(emulate_tpws);
638 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
639
640 DEF_DEV_ATTRIB(emulate_caw);
641 SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
642
643 DEF_DEV_ATTRIB(emulate_3pc);
644 SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
645
646 DEF_DEV_ATTRIB(pi_prot_type);
647 SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
648
649 DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
650 SE_DEV_ATTR_RO(hw_pi_prot_type);
651
652 DEF_DEV_ATTRIB(pi_prot_format);
653 SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
654
655 DEF_DEV_ATTRIB(enforce_pr_isids);
656 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
657
658 DEF_DEV_ATTRIB(is_nonrot);
659 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
660
661 DEF_DEV_ATTRIB(emulate_rest_reord);
662 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
663
664 DEF_DEV_ATTRIB_RO(hw_block_size);
665 SE_DEV_ATTR_RO(hw_block_size);
666
667 DEF_DEV_ATTRIB(block_size);
668 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
669
670 DEF_DEV_ATTRIB_RO(hw_max_sectors);
671 SE_DEV_ATTR_RO(hw_max_sectors);
672
673 DEF_DEV_ATTRIB(fabric_max_sectors);
674 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
675
676 DEF_DEV_ATTRIB(optimal_sectors);
677 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
678
679 DEF_DEV_ATTRIB_RO(hw_queue_depth);
680 SE_DEV_ATTR_RO(hw_queue_depth);
681
682 DEF_DEV_ATTRIB(queue_depth);
683 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
684
685 DEF_DEV_ATTRIB(max_unmap_lba_count);
686 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
687
688 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
689 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
690
691 DEF_DEV_ATTRIB(unmap_granularity);
692 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
693
694 DEF_DEV_ATTRIB(unmap_granularity_alignment);
695 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
696
697 DEF_DEV_ATTRIB(max_write_same_len);
698 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
699
700 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
701
702 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
703 &target_core_dev_attrib_emulate_model_alias.attr,
704 &target_core_dev_attrib_emulate_dpo.attr,
705 &target_core_dev_attrib_emulate_fua_write.attr,
706 &target_core_dev_attrib_emulate_fua_read.attr,
707 &target_core_dev_attrib_emulate_write_cache.attr,
708 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
709 &target_core_dev_attrib_emulate_tas.attr,
710 &target_core_dev_attrib_emulate_tpu.attr,
711 &target_core_dev_attrib_emulate_tpws.attr,
712 &target_core_dev_attrib_emulate_caw.attr,
713 &target_core_dev_attrib_emulate_3pc.attr,
714 &target_core_dev_attrib_pi_prot_type.attr,
715 &target_core_dev_attrib_hw_pi_prot_type.attr,
716 &target_core_dev_attrib_pi_prot_format.attr,
717 &target_core_dev_attrib_enforce_pr_isids.attr,
718 &target_core_dev_attrib_is_nonrot.attr,
719 &target_core_dev_attrib_emulate_rest_reord.attr,
720 &target_core_dev_attrib_hw_block_size.attr,
721 &target_core_dev_attrib_block_size.attr,
722 &target_core_dev_attrib_hw_max_sectors.attr,
723 &target_core_dev_attrib_fabric_max_sectors.attr,
724 &target_core_dev_attrib_optimal_sectors.attr,
725 &target_core_dev_attrib_hw_queue_depth.attr,
726 &target_core_dev_attrib_queue_depth.attr,
727 &target_core_dev_attrib_max_unmap_lba_count.attr,
728 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
729 &target_core_dev_attrib_unmap_granularity.attr,
730 &target_core_dev_attrib_unmap_granularity_alignment.attr,
731 &target_core_dev_attrib_max_write_same_len.attr,
732 NULL,
733 };
734
735 static struct configfs_item_operations target_core_dev_attrib_ops = {
736 .show_attribute = target_core_dev_attrib_attr_show,
737 .store_attribute = target_core_dev_attrib_attr_store,
738 };
739
740 static struct config_item_type target_core_dev_attrib_cit = {
741 .ct_item_ops = &target_core_dev_attrib_ops,
742 .ct_attrs = target_core_dev_attrib_attrs,
743 .ct_owner = THIS_MODULE,
744 };
745
746 /* End functions for struct config_item_type target_core_dev_attrib_cit */
747
748 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
749
750 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
751 #define SE_DEV_WWN_ATTR(_name, _mode) \
752 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
753 __CONFIGFS_EATTR(_name, _mode, \
754 target_core_dev_wwn_show_attr_##_name, \
755 target_core_dev_wwn_store_attr_##_name);
756
757 #define SE_DEV_WWN_ATTR_RO(_name); \
758 do { \
759 static struct target_core_dev_wwn_attribute \
760 target_core_dev_wwn_##_name = \
761 __CONFIGFS_EATTR_RO(_name, \
762 target_core_dev_wwn_show_attr_##_name); \
763 } while (0);
764
765 /*
766 * VPD page 0x80 Unit serial
767 */
768 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
769 struct t10_wwn *t10_wwn,
770 char *page)
771 {
772 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
773 &t10_wwn->unit_serial[0]);
774 }
775
776 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
777 struct t10_wwn *t10_wwn,
778 const char *page,
779 size_t count)
780 {
781 struct se_device *dev = t10_wwn->t10_dev;
782 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
783
784 /*
785 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
786 * from the struct scsi_device level firmware, do not allow
787 * VPD Unit Serial to be emulated.
788 *
789 * Note this struct scsi_device could also be emulating VPD
790 * information from its drivers/scsi LLD. But for now we assume
791 * it is doing 'the right thing' wrt a world wide unique
792 * VPD Unit Serial Number that OS dependent multipath can depend on.
793 */
794 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
795 pr_err("Underlying SCSI device firmware provided VPD"
796 " Unit Serial, ignoring request\n");
797 return -EOPNOTSUPP;
798 }
799
800 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
801 pr_err("Emulated VPD Unit Serial exceeds"
802 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
803 return -EOVERFLOW;
804 }
805 /*
806 * Check to see if any active $FABRIC_MOD exports exist. If they
807 * do exist, fail here as changing this information on the fly
808 * (underneath the initiator side OS dependent multipath code)
809 * could cause negative effects.
810 */
811 if (dev->export_count) {
812 pr_err("Unable to set VPD Unit Serial while"
813 " active %d $FABRIC_MOD exports exist\n",
814 dev->export_count);
815 return -EINVAL;
816 }
817
818 /*
819 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
820 *
821 * Also, strip any newline added from the userspace
822 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
823 */
824 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
825 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
826 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
827 "%s", strstrip(buf));
828 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
829
830 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
831 " %s\n", dev->t10_wwn.unit_serial);
832
833 return count;
834 }
835
836 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
837
838 /*
839 * VPD page 0x83 Protocol Identifier
840 */
841 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
842 struct t10_wwn *t10_wwn,
843 char *page)
844 {
845 struct t10_vpd *vpd;
846 unsigned char buf[VPD_TMP_BUF_SIZE];
847 ssize_t len = 0;
848
849 memset(buf, 0, VPD_TMP_BUF_SIZE);
850
851 spin_lock(&t10_wwn->t10_vpd_lock);
852 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
853 if (!vpd->protocol_identifier_set)
854 continue;
855
856 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
857
858 if (len + strlen(buf) >= PAGE_SIZE)
859 break;
860
861 len += sprintf(page+len, "%s", buf);
862 }
863 spin_unlock(&t10_wwn->t10_vpd_lock);
864
865 return len;
866 }
867
868 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
869 struct t10_wwn *t10_wwn,
870 const char *page,
871 size_t count)
872 {
873 return -ENOSYS;
874 }
875
876 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
877
878 /*
879 * Generic wrapper for dumping VPD identifiers by association.
880 */
881 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
882 static ssize_t target_core_dev_wwn_show_attr_##_name( \
883 struct t10_wwn *t10_wwn, \
884 char *page) \
885 { \
886 struct t10_vpd *vpd; \
887 unsigned char buf[VPD_TMP_BUF_SIZE]; \
888 ssize_t len = 0; \
889 \
890 spin_lock(&t10_wwn->t10_vpd_lock); \
891 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
892 if (vpd->association != _assoc) \
893 continue; \
894 \
895 memset(buf, 0, VPD_TMP_BUF_SIZE); \
896 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
897 if (len + strlen(buf) >= PAGE_SIZE) \
898 break; \
899 len += sprintf(page+len, "%s", buf); \
900 \
901 memset(buf, 0, VPD_TMP_BUF_SIZE); \
902 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
903 if (len + strlen(buf) >= PAGE_SIZE) \
904 break; \
905 len += sprintf(page+len, "%s", buf); \
906 \
907 memset(buf, 0, VPD_TMP_BUF_SIZE); \
908 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
909 if (len + strlen(buf) >= PAGE_SIZE) \
910 break; \
911 len += sprintf(page+len, "%s", buf); \
912 } \
913 spin_unlock(&t10_wwn->t10_vpd_lock); \
914 \
915 return len; \
916 }
917
918 /*
919 * VPD page 0x83 Association: Logical Unit
920 */
921 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
922
923 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
924 struct t10_wwn *t10_wwn,
925 const char *page,
926 size_t count)
927 {
928 return -ENOSYS;
929 }
930
931 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
932
933 /*
934 * VPD page 0x83 Association: Target Port
935 */
936 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
937
938 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
939 struct t10_wwn *t10_wwn,
940 const char *page,
941 size_t count)
942 {
943 return -ENOSYS;
944 }
945
946 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
947
948 /*
949 * VPD page 0x83 Association: SCSI Target Device
950 */
951 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
952
953 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
954 struct t10_wwn *t10_wwn,
955 const char *page,
956 size_t count)
957 {
958 return -ENOSYS;
959 }
960
961 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
962
963 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
964
965 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
966 &target_core_dev_wwn_vpd_unit_serial.attr,
967 &target_core_dev_wwn_vpd_protocol_identifier.attr,
968 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
969 &target_core_dev_wwn_vpd_assoc_target_port.attr,
970 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
971 NULL,
972 };
973
974 static struct configfs_item_operations target_core_dev_wwn_ops = {
975 .show_attribute = target_core_dev_wwn_attr_show,
976 .store_attribute = target_core_dev_wwn_attr_store,
977 };
978
979 static struct config_item_type target_core_dev_wwn_cit = {
980 .ct_item_ops = &target_core_dev_wwn_ops,
981 .ct_attrs = target_core_dev_wwn_attrs,
982 .ct_owner = THIS_MODULE,
983 };
984
985 /* End functions for struct config_item_type target_core_dev_wwn_cit */
986
987 /* Start functions for struct config_item_type target_core_dev_pr_cit */
988
989 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
990 #define SE_DEV_PR_ATTR(_name, _mode) \
991 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
992 __CONFIGFS_EATTR(_name, _mode, \
993 target_core_dev_pr_show_attr_##_name, \
994 target_core_dev_pr_store_attr_##_name);
995
996 #define SE_DEV_PR_ATTR_RO(_name); \
997 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
998 __CONFIGFS_EATTR_RO(_name, \
999 target_core_dev_pr_show_attr_##_name);
1000
1001 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1002 char *page)
1003 {
1004 struct se_node_acl *se_nacl;
1005 struct t10_pr_registration *pr_reg;
1006 char i_buf[PR_REG_ISID_ID_LEN];
1007
1008 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1009
1010 pr_reg = dev->dev_pr_res_holder;
1011 if (!pr_reg)
1012 return sprintf(page, "No SPC-3 Reservation holder\n");
1013
1014 se_nacl = pr_reg->pr_reg_nacl;
1015 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1016
1017 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1018 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1019 se_nacl->initiatorname, i_buf);
1020 }
1021
1022 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1023 char *page)
1024 {
1025 struct se_node_acl *se_nacl;
1026 ssize_t len;
1027
1028 se_nacl = dev->dev_reserved_node_acl;
1029 if (se_nacl) {
1030 len = sprintf(page,
1031 "SPC-2 Reservation: %s Initiator: %s\n",
1032 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1033 se_nacl->initiatorname);
1034 } else {
1035 len = sprintf(page, "No SPC-2 Reservation holder\n");
1036 }
1037 return len;
1038 }
1039
1040 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1041 char *page)
1042 {
1043 int ret;
1044
1045 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1046 return sprintf(page, "Passthrough\n");
1047
1048 spin_lock(&dev->dev_reservation_lock);
1049 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1050 ret = target_core_dev_pr_show_spc2_res(dev, page);
1051 else
1052 ret = target_core_dev_pr_show_spc3_res(dev, page);
1053 spin_unlock(&dev->dev_reservation_lock);
1054 return ret;
1055 }
1056
1057 SE_DEV_PR_ATTR_RO(res_holder);
1058
1059 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1060 struct se_device *dev, char *page)
1061 {
1062 ssize_t len = 0;
1063
1064 spin_lock(&dev->dev_reservation_lock);
1065 if (!dev->dev_pr_res_holder) {
1066 len = sprintf(page, "No SPC-3 Reservation holder\n");
1067 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1068 len = sprintf(page, "SPC-3 Reservation: All Target"
1069 " Ports registration\n");
1070 } else {
1071 len = sprintf(page, "SPC-3 Reservation: Single"
1072 " Target Port registration\n");
1073 }
1074
1075 spin_unlock(&dev->dev_reservation_lock);
1076 return len;
1077 }
1078
1079 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1080
1081 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1082 struct se_device *dev, char *page)
1083 {
1084 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1085 }
1086
1087 SE_DEV_PR_ATTR_RO(res_pr_generation);
1088
1089 /*
1090 * res_pr_holder_tg_port
1091 */
1092 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1093 struct se_device *dev, char *page)
1094 {
1095 struct se_node_acl *se_nacl;
1096 struct se_lun *lun;
1097 struct se_portal_group *se_tpg;
1098 struct t10_pr_registration *pr_reg;
1099 struct target_core_fabric_ops *tfo;
1100 ssize_t len = 0;
1101
1102 spin_lock(&dev->dev_reservation_lock);
1103 pr_reg = dev->dev_pr_res_holder;
1104 if (!pr_reg) {
1105 len = sprintf(page, "No SPC-3 Reservation holder\n");
1106 goto out_unlock;
1107 }
1108
1109 se_nacl = pr_reg->pr_reg_nacl;
1110 se_tpg = se_nacl->se_tpg;
1111 lun = pr_reg->pr_reg_tg_pt_lun;
1112 tfo = se_tpg->se_tpg_tfo;
1113
1114 len += sprintf(page+len, "SPC-3 Reservation: %s"
1115 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1116 tfo->tpg_get_wwn(se_tpg));
1117 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1118 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1119 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1120 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1121 tfo->get_fabric_name(), lun->unpacked_lun);
1122
1123 out_unlock:
1124 spin_unlock(&dev->dev_reservation_lock);
1125 return len;
1126 }
1127
1128 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1129
1130 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1131 struct se_device *dev, char *page)
1132 {
1133 struct target_core_fabric_ops *tfo;
1134 struct t10_pr_registration *pr_reg;
1135 unsigned char buf[384];
1136 char i_buf[PR_REG_ISID_ID_LEN];
1137 ssize_t len = 0;
1138 int reg_count = 0;
1139
1140 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1141
1142 spin_lock(&dev->t10_pr.registration_lock);
1143 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1144 pr_reg_list) {
1145
1146 memset(buf, 0, 384);
1147 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1148 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1149 core_pr_dump_initiator_port(pr_reg, i_buf,
1150 PR_REG_ISID_ID_LEN);
1151 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1152 tfo->get_fabric_name(),
1153 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1154 pr_reg->pr_res_generation);
1155
1156 if (len + strlen(buf) >= PAGE_SIZE)
1157 break;
1158
1159 len += sprintf(page+len, "%s", buf);
1160 reg_count++;
1161 }
1162 spin_unlock(&dev->t10_pr.registration_lock);
1163
1164 if (!reg_count)
1165 len += sprintf(page+len, "None\n");
1166
1167 return len;
1168 }
1169
1170 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1171
1172 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1173 struct se_device *dev, char *page)
1174 {
1175 struct t10_pr_registration *pr_reg;
1176 ssize_t len = 0;
1177
1178 spin_lock(&dev->dev_reservation_lock);
1179 pr_reg = dev->dev_pr_res_holder;
1180 if (pr_reg) {
1181 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1182 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1183 } else {
1184 len = sprintf(page, "No SPC-3 Reservation holder\n");
1185 }
1186
1187 spin_unlock(&dev->dev_reservation_lock);
1188 return len;
1189 }
1190
1191 SE_DEV_PR_ATTR_RO(res_pr_type);
1192
1193 static ssize_t target_core_dev_pr_show_attr_res_type(
1194 struct se_device *dev, char *page)
1195 {
1196 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1197 return sprintf(page, "SPC_PASSTHROUGH\n");
1198 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1199 return sprintf(page, "SPC2_RESERVATIONS\n");
1200 else
1201 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1202 }
1203
1204 SE_DEV_PR_ATTR_RO(res_type);
1205
1206 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1207 struct se_device *dev, char *page)
1208 {
1209 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1210 return 0;
1211
1212 return sprintf(page, "APTPL Bit Status: %s\n",
1213 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1214 }
1215
1216 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1217
1218 /*
1219 * res_aptpl_metadata
1220 */
1221 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1222 struct se_device *dev, char *page)
1223 {
1224 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1225 return 0;
1226
1227 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1228 }
1229
1230 enum {
1231 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1232 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1233 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1234 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1235 };
1236
1237 static match_table_t tokens = {
1238 {Opt_initiator_fabric, "initiator_fabric=%s"},
1239 {Opt_initiator_node, "initiator_node=%s"},
1240 {Opt_initiator_sid, "initiator_sid=%s"},
1241 {Opt_sa_res_key, "sa_res_key=%s"},
1242 {Opt_res_holder, "res_holder=%d"},
1243 {Opt_res_type, "res_type=%d"},
1244 {Opt_res_scope, "res_scope=%d"},
1245 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1246 {Opt_mapped_lun, "mapped_lun=%d"},
1247 {Opt_target_fabric, "target_fabric=%s"},
1248 {Opt_target_node, "target_node=%s"},
1249 {Opt_tpgt, "tpgt=%d"},
1250 {Opt_port_rtpi, "port_rtpi=%d"},
1251 {Opt_target_lun, "target_lun=%d"},
1252 {Opt_err, NULL}
1253 };
1254
1255 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1256 struct se_device *dev,
1257 const char *page,
1258 size_t count)
1259 {
1260 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1261 unsigned char *t_fabric = NULL, *t_port = NULL;
1262 char *orig, *ptr, *arg_p, *opts;
1263 substring_t args[MAX_OPT_ARGS];
1264 unsigned long long tmp_ll;
1265 u64 sa_res_key = 0;
1266 u32 mapped_lun = 0, target_lun = 0;
1267 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1268 u16 port_rpti = 0, tpgt = 0;
1269 u8 type = 0, scope;
1270
1271 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1272 return 0;
1273 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1274 return 0;
1275
1276 if (dev->export_count) {
1277 pr_debug("Unable to process APTPL metadata while"
1278 " active fabric exports exist\n");
1279 return -EINVAL;
1280 }
1281
1282 opts = kstrdup(page, GFP_KERNEL);
1283 if (!opts)
1284 return -ENOMEM;
1285
1286 orig = opts;
1287 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1288 if (!*ptr)
1289 continue;
1290
1291 token = match_token(ptr, tokens, args);
1292 switch (token) {
1293 case Opt_initiator_fabric:
1294 i_fabric = match_strdup(&args[0]);
1295 if (!i_fabric) {
1296 ret = -ENOMEM;
1297 goto out;
1298 }
1299 break;
1300 case Opt_initiator_node:
1301 i_port = match_strdup(&args[0]);
1302 if (!i_port) {
1303 ret = -ENOMEM;
1304 goto out;
1305 }
1306 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1307 pr_err("APTPL metadata initiator_node="
1308 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1309 PR_APTPL_MAX_IPORT_LEN);
1310 ret = -EINVAL;
1311 break;
1312 }
1313 break;
1314 case Opt_initiator_sid:
1315 isid = match_strdup(&args[0]);
1316 if (!isid) {
1317 ret = -ENOMEM;
1318 goto out;
1319 }
1320 if (strlen(isid) >= PR_REG_ISID_LEN) {
1321 pr_err("APTPL metadata initiator_isid"
1322 "= exceeds PR_REG_ISID_LEN: %d\n",
1323 PR_REG_ISID_LEN);
1324 ret = -EINVAL;
1325 break;
1326 }
1327 break;
1328 case Opt_sa_res_key:
1329 arg_p = match_strdup(&args[0]);
1330 if (!arg_p) {
1331 ret = -ENOMEM;
1332 goto out;
1333 }
1334 ret = kstrtoull(arg_p, 0, &tmp_ll);
1335 if (ret < 0) {
1336 pr_err("kstrtoull() failed for"
1337 " sa_res_key=\n");
1338 goto out;
1339 }
1340 sa_res_key = (u64)tmp_ll;
1341 break;
1342 /*
1343 * PR APTPL Metadata for Reservation
1344 */
1345 case Opt_res_holder:
1346 match_int(args, &arg);
1347 res_holder = arg;
1348 break;
1349 case Opt_res_type:
1350 match_int(args, &arg);
1351 type = (u8)arg;
1352 break;
1353 case Opt_res_scope:
1354 match_int(args, &arg);
1355 scope = (u8)arg;
1356 break;
1357 case Opt_res_all_tg_pt:
1358 match_int(args, &arg);
1359 all_tg_pt = (int)arg;
1360 break;
1361 case Opt_mapped_lun:
1362 match_int(args, &arg);
1363 mapped_lun = (u32)arg;
1364 break;
1365 /*
1366 * PR APTPL Metadata for Target Port
1367 */
1368 case Opt_target_fabric:
1369 t_fabric = match_strdup(&args[0]);
1370 if (!t_fabric) {
1371 ret = -ENOMEM;
1372 goto out;
1373 }
1374 break;
1375 case Opt_target_node:
1376 t_port = match_strdup(&args[0]);
1377 if (!t_port) {
1378 ret = -ENOMEM;
1379 goto out;
1380 }
1381 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1382 pr_err("APTPL metadata target_node="
1383 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1384 PR_APTPL_MAX_TPORT_LEN);
1385 ret = -EINVAL;
1386 break;
1387 }
1388 break;
1389 case Opt_tpgt:
1390 match_int(args, &arg);
1391 tpgt = (u16)arg;
1392 break;
1393 case Opt_port_rtpi:
1394 match_int(args, &arg);
1395 port_rpti = (u16)arg;
1396 break;
1397 case Opt_target_lun:
1398 match_int(args, &arg);
1399 target_lun = (u32)arg;
1400 break;
1401 default:
1402 break;
1403 }
1404 }
1405
1406 if (!i_port || !t_port || !sa_res_key) {
1407 pr_err("Illegal parameters for APTPL registration\n");
1408 ret = -EINVAL;
1409 goto out;
1410 }
1411
1412 if (res_holder && !(type)) {
1413 pr_err("Illegal PR type: 0x%02x for reservation"
1414 " holder\n", type);
1415 ret = -EINVAL;
1416 goto out;
1417 }
1418
1419 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1420 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1421 res_holder, all_tg_pt, type);
1422 out:
1423 kfree(i_fabric);
1424 kfree(i_port);
1425 kfree(isid);
1426 kfree(t_fabric);
1427 kfree(t_port);
1428 kfree(orig);
1429 return (ret == 0) ? count : ret;
1430 }
1431
1432 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1433
1434 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1435
1436 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1437 &target_core_dev_pr_res_holder.attr,
1438 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1439 &target_core_dev_pr_res_pr_generation.attr,
1440 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1441 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1442 &target_core_dev_pr_res_pr_type.attr,
1443 &target_core_dev_pr_res_type.attr,
1444 &target_core_dev_pr_res_aptpl_active.attr,
1445 &target_core_dev_pr_res_aptpl_metadata.attr,
1446 NULL,
1447 };
1448
1449 static struct configfs_item_operations target_core_dev_pr_ops = {
1450 .show_attribute = target_core_dev_pr_attr_show,
1451 .store_attribute = target_core_dev_pr_attr_store,
1452 };
1453
1454 static struct config_item_type target_core_dev_pr_cit = {
1455 .ct_item_ops = &target_core_dev_pr_ops,
1456 .ct_attrs = target_core_dev_pr_attrs,
1457 .ct_owner = THIS_MODULE,
1458 };
1459
1460 /* End functions for struct config_item_type target_core_dev_pr_cit */
1461
1462 /* Start functions for struct config_item_type target_core_dev_cit */
1463
1464 static ssize_t target_core_show_dev_info(void *p, char *page)
1465 {
1466 struct se_device *dev = p;
1467 struct se_subsystem_api *t = dev->transport;
1468 int bl = 0;
1469 ssize_t read_bytes = 0;
1470
1471 transport_dump_dev_state(dev, page, &bl);
1472 read_bytes += bl;
1473 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1474 return read_bytes;
1475 }
1476
1477 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1478 .attr = { .ca_owner = THIS_MODULE,
1479 .ca_name = "info",
1480 .ca_mode = S_IRUGO },
1481 .show = target_core_show_dev_info,
1482 .store = NULL,
1483 };
1484
1485 static ssize_t target_core_store_dev_control(
1486 void *p,
1487 const char *page,
1488 size_t count)
1489 {
1490 struct se_device *dev = p;
1491 struct se_subsystem_api *t = dev->transport;
1492
1493 return t->set_configfs_dev_params(dev, page, count);
1494 }
1495
1496 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1497 .attr = { .ca_owner = THIS_MODULE,
1498 .ca_name = "control",
1499 .ca_mode = S_IWUSR },
1500 .show = NULL,
1501 .store = target_core_store_dev_control,
1502 };
1503
1504 static ssize_t target_core_show_dev_alias(void *p, char *page)
1505 {
1506 struct se_device *dev = p;
1507
1508 if (!(dev->dev_flags & DF_USING_ALIAS))
1509 return 0;
1510
1511 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1512 }
1513
1514 static ssize_t target_core_store_dev_alias(
1515 void *p,
1516 const char *page,
1517 size_t count)
1518 {
1519 struct se_device *dev = p;
1520 struct se_hba *hba = dev->se_hba;
1521 ssize_t read_bytes;
1522
1523 if (count > (SE_DEV_ALIAS_LEN-1)) {
1524 pr_err("alias count: %d exceeds"
1525 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1526 SE_DEV_ALIAS_LEN-1);
1527 return -EINVAL;
1528 }
1529
1530 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1531 if (!read_bytes)
1532 return -EINVAL;
1533 if (dev->dev_alias[read_bytes - 1] == '\n')
1534 dev->dev_alias[read_bytes - 1] = '\0';
1535
1536 dev->dev_flags |= DF_USING_ALIAS;
1537
1538 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1539 config_item_name(&hba->hba_group.cg_item),
1540 config_item_name(&dev->dev_group.cg_item),
1541 dev->dev_alias);
1542
1543 return read_bytes;
1544 }
1545
1546 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1547 .attr = { .ca_owner = THIS_MODULE,
1548 .ca_name = "alias",
1549 .ca_mode = S_IRUGO | S_IWUSR },
1550 .show = target_core_show_dev_alias,
1551 .store = target_core_store_dev_alias,
1552 };
1553
1554 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1555 {
1556 struct se_device *dev = p;
1557
1558 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1559 return 0;
1560
1561 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1562 }
1563
1564 static ssize_t target_core_store_dev_udev_path(
1565 void *p,
1566 const char *page,
1567 size_t count)
1568 {
1569 struct se_device *dev = p;
1570 struct se_hba *hba = dev->se_hba;
1571 ssize_t read_bytes;
1572
1573 if (count > (SE_UDEV_PATH_LEN-1)) {
1574 pr_err("udev_path count: %d exceeds"
1575 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1576 SE_UDEV_PATH_LEN-1);
1577 return -EINVAL;
1578 }
1579
1580 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1581 "%s", page);
1582 if (!read_bytes)
1583 return -EINVAL;
1584 if (dev->udev_path[read_bytes - 1] == '\n')
1585 dev->udev_path[read_bytes - 1] = '\0';
1586
1587 dev->dev_flags |= DF_USING_UDEV_PATH;
1588
1589 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1590 config_item_name(&hba->hba_group.cg_item),
1591 config_item_name(&dev->dev_group.cg_item),
1592 dev->udev_path);
1593
1594 return read_bytes;
1595 }
1596
1597 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1598 .attr = { .ca_owner = THIS_MODULE,
1599 .ca_name = "udev_path",
1600 .ca_mode = S_IRUGO | S_IWUSR },
1601 .show = target_core_show_dev_udev_path,
1602 .store = target_core_store_dev_udev_path,
1603 };
1604
1605 static ssize_t target_core_show_dev_enable(void *p, char *page)
1606 {
1607 struct se_device *dev = p;
1608
1609 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1610 }
1611
1612 static ssize_t target_core_store_dev_enable(
1613 void *p,
1614 const char *page,
1615 size_t count)
1616 {
1617 struct se_device *dev = p;
1618 char *ptr;
1619 int ret;
1620
1621 ptr = strstr(page, "1");
1622 if (!ptr) {
1623 pr_err("For dev_enable ops, only valid value"
1624 " is \"1\"\n");
1625 return -EINVAL;
1626 }
1627
1628 ret = target_configure_device(dev);
1629 if (ret)
1630 return ret;
1631 return count;
1632 }
1633
1634 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1635 .attr = { .ca_owner = THIS_MODULE,
1636 .ca_name = "enable",
1637 .ca_mode = S_IRUGO | S_IWUSR },
1638 .show = target_core_show_dev_enable,
1639 .store = target_core_store_dev_enable,
1640 };
1641
1642 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1643 {
1644 struct se_device *dev = p;
1645 struct config_item *lu_ci;
1646 struct t10_alua_lu_gp *lu_gp;
1647 struct t10_alua_lu_gp_member *lu_gp_mem;
1648 ssize_t len = 0;
1649
1650 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1651 if (!lu_gp_mem)
1652 return 0;
1653
1654 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1655 lu_gp = lu_gp_mem->lu_gp;
1656 if (lu_gp) {
1657 lu_ci = &lu_gp->lu_gp_group.cg_item;
1658 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1659 config_item_name(lu_ci), lu_gp->lu_gp_id);
1660 }
1661 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1662
1663 return len;
1664 }
1665
1666 static ssize_t target_core_store_alua_lu_gp(
1667 void *p,
1668 const char *page,
1669 size_t count)
1670 {
1671 struct se_device *dev = p;
1672 struct se_hba *hba = dev->se_hba;
1673 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1674 struct t10_alua_lu_gp_member *lu_gp_mem;
1675 unsigned char buf[LU_GROUP_NAME_BUF];
1676 int move = 0;
1677
1678 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1679 if (!lu_gp_mem)
1680 return 0;
1681
1682 if (count > LU_GROUP_NAME_BUF) {
1683 pr_err("ALUA LU Group Alias too large!\n");
1684 return -EINVAL;
1685 }
1686 memset(buf, 0, LU_GROUP_NAME_BUF);
1687 memcpy(buf, page, count);
1688 /*
1689 * Any ALUA logical unit alias besides "NULL" means we will be
1690 * making a new group association.
1691 */
1692 if (strcmp(strstrip(buf), "NULL")) {
1693 /*
1694 * core_alua_get_lu_gp_by_name() will increment reference to
1695 * struct t10_alua_lu_gp. This reference is released with
1696 * core_alua_get_lu_gp_by_name below().
1697 */
1698 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1699 if (!lu_gp_new)
1700 return -ENODEV;
1701 }
1702
1703 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1704 lu_gp = lu_gp_mem->lu_gp;
1705 if (lu_gp) {
1706 /*
1707 * Clearing an existing lu_gp association, and replacing
1708 * with NULL
1709 */
1710 if (!lu_gp_new) {
1711 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1712 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1713 " %hu\n",
1714 config_item_name(&hba->hba_group.cg_item),
1715 config_item_name(&dev->dev_group.cg_item),
1716 config_item_name(&lu_gp->lu_gp_group.cg_item),
1717 lu_gp->lu_gp_id);
1718
1719 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1720 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1721
1722 return count;
1723 }
1724 /*
1725 * Removing existing association of lu_gp_mem with lu_gp
1726 */
1727 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1728 move = 1;
1729 }
1730 /*
1731 * Associate lu_gp_mem with lu_gp_new.
1732 */
1733 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1734 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1735
1736 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1737 " core/alua/lu_gps/%s, ID: %hu\n",
1738 (move) ? "Moving" : "Adding",
1739 config_item_name(&hba->hba_group.cg_item),
1740 config_item_name(&dev->dev_group.cg_item),
1741 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1742 lu_gp_new->lu_gp_id);
1743
1744 core_alua_put_lu_gp_from_name(lu_gp_new);
1745 return count;
1746 }
1747
1748 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1749 .attr = { .ca_owner = THIS_MODULE,
1750 .ca_name = "alua_lu_gp",
1751 .ca_mode = S_IRUGO | S_IWUSR },
1752 .show = target_core_show_alua_lu_gp,
1753 .store = target_core_store_alua_lu_gp,
1754 };
1755
1756 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1757 {
1758 struct se_device *dev = p;
1759 struct t10_alua_lba_map *map;
1760 struct t10_alua_lba_map_member *mem;
1761 char *b = page;
1762 int bl = 0;
1763 char state;
1764
1765 spin_lock(&dev->t10_alua.lba_map_lock);
1766 if (!list_empty(&dev->t10_alua.lba_map_list))
1767 bl += sprintf(b + bl, "%u %u\n",
1768 dev->t10_alua.lba_map_segment_size,
1769 dev->t10_alua.lba_map_segment_multiplier);
1770 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1771 bl += sprintf(b + bl, "%llu %llu",
1772 map->lba_map_first_lba, map->lba_map_last_lba);
1773 list_for_each_entry(mem, &map->lba_map_mem_list,
1774 lba_map_mem_list) {
1775 switch (mem->lba_map_mem_alua_state) {
1776 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1777 state = 'O';
1778 break;
1779 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1780 state = 'A';
1781 break;
1782 case ALUA_ACCESS_STATE_STANDBY:
1783 state = 'S';
1784 break;
1785 case ALUA_ACCESS_STATE_UNAVAILABLE:
1786 state = 'U';
1787 break;
1788 default:
1789 state = '.';
1790 break;
1791 }
1792 bl += sprintf(b + bl, " %d:%c",
1793 mem->lba_map_mem_alua_pg_id, state);
1794 }
1795 bl += sprintf(b + bl, "\n");
1796 }
1797 spin_unlock(&dev->t10_alua.lba_map_lock);
1798 return bl;
1799 }
1800
1801 static ssize_t target_core_store_dev_lba_map(
1802 void *p,
1803 const char *page,
1804 size_t count)
1805 {
1806 struct se_device *dev = p;
1807 struct t10_alua_lba_map *lba_map = NULL;
1808 struct list_head lba_list;
1809 char *map_entries, *ptr;
1810 char state;
1811 int pg_num = -1, pg;
1812 int ret = 0, num = 0, pg_id, alua_state;
1813 unsigned long start_lba = -1, end_lba = -1;
1814 unsigned long segment_size = -1, segment_mult = -1;
1815
1816 map_entries = kstrdup(page, GFP_KERNEL);
1817 if (!map_entries)
1818 return -ENOMEM;
1819
1820 INIT_LIST_HEAD(&lba_list);
1821 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1822 if (!*ptr)
1823 continue;
1824
1825 if (num == 0) {
1826 if (sscanf(ptr, "%lu %lu\n",
1827 &segment_size, &segment_mult) != 2) {
1828 pr_err("Invalid line %d\n", num);
1829 ret = -EINVAL;
1830 break;
1831 }
1832 num++;
1833 continue;
1834 }
1835 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1836 pr_err("Invalid line %d\n", num);
1837 ret = -EINVAL;
1838 break;
1839 }
1840 ptr = strchr(ptr, ' ');
1841 if (!ptr) {
1842 pr_err("Invalid line %d, missing end lba\n", num);
1843 ret = -EINVAL;
1844 break;
1845 }
1846 ptr++;
1847 ptr = strchr(ptr, ' ');
1848 if (!ptr) {
1849 pr_err("Invalid line %d, missing state definitions\n",
1850 num);
1851 ret = -EINVAL;
1852 break;
1853 }
1854 ptr++;
1855 lba_map = core_alua_allocate_lba_map(&lba_list,
1856 start_lba, end_lba);
1857 if (IS_ERR(lba_map)) {
1858 ret = PTR_ERR(lba_map);
1859 break;
1860 }
1861 pg = 0;
1862 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1863 switch (state) {
1864 case 'O':
1865 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1866 break;
1867 case 'A':
1868 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1869 break;
1870 case 'S':
1871 alua_state = ALUA_ACCESS_STATE_STANDBY;
1872 break;
1873 case 'U':
1874 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1875 break;
1876 default:
1877 pr_err("Invalid ALUA state '%c'\n", state);
1878 ret = -EINVAL;
1879 goto out;
1880 }
1881
1882 ret = core_alua_allocate_lba_map_mem(lba_map,
1883 pg_id, alua_state);
1884 if (ret) {
1885 pr_err("Invalid target descriptor %d:%c "
1886 "at line %d\n",
1887 pg_id, state, num);
1888 break;
1889 }
1890 pg++;
1891 ptr = strchr(ptr, ' ');
1892 if (ptr)
1893 ptr++;
1894 else
1895 break;
1896 }
1897 if (pg_num == -1)
1898 pg_num = pg;
1899 else if (pg != pg_num) {
1900 pr_err("Only %d from %d port groups definitions "
1901 "at line %d\n", pg, pg_num, num);
1902 ret = -EINVAL;
1903 break;
1904 }
1905 num++;
1906 }
1907 out:
1908 if (ret) {
1909 core_alua_free_lba_map(&lba_list);
1910 count = ret;
1911 } else
1912 core_alua_set_lba_map(dev, &lba_list,
1913 segment_size, segment_mult);
1914 kfree(map_entries);
1915 return count;
1916 }
1917
1918 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1919 .attr = { .ca_owner = THIS_MODULE,
1920 .ca_name = "lba_map",
1921 .ca_mode = S_IRUGO | S_IWUSR },
1922 .show = target_core_show_dev_lba_map,
1923 .store = target_core_store_dev_lba_map,
1924 };
1925
1926 static struct configfs_attribute *lio_core_dev_attrs[] = {
1927 &target_core_attr_dev_info.attr,
1928 &target_core_attr_dev_control.attr,
1929 &target_core_attr_dev_alias.attr,
1930 &target_core_attr_dev_udev_path.attr,
1931 &target_core_attr_dev_enable.attr,
1932 &target_core_attr_dev_alua_lu_gp.attr,
1933 &target_core_attr_dev_lba_map.attr,
1934 NULL,
1935 };
1936
1937 static void target_core_dev_release(struct config_item *item)
1938 {
1939 struct config_group *dev_cg = to_config_group(item);
1940 struct se_device *dev =
1941 container_of(dev_cg, struct se_device, dev_group);
1942
1943 kfree(dev_cg->default_groups);
1944 target_free_device(dev);
1945 }
1946
1947 static ssize_t target_core_dev_show(struct config_item *item,
1948 struct configfs_attribute *attr,
1949 char *page)
1950 {
1951 struct config_group *dev_cg = to_config_group(item);
1952 struct se_device *dev =
1953 container_of(dev_cg, struct se_device, dev_group);
1954 struct target_core_configfs_attribute *tc_attr = container_of(
1955 attr, struct target_core_configfs_attribute, attr);
1956
1957 if (!tc_attr->show)
1958 return -EINVAL;
1959
1960 return tc_attr->show(dev, page);
1961 }
1962
1963 static ssize_t target_core_dev_store(struct config_item *item,
1964 struct configfs_attribute *attr,
1965 const char *page, size_t count)
1966 {
1967 struct config_group *dev_cg = to_config_group(item);
1968 struct se_device *dev =
1969 container_of(dev_cg, struct se_device, dev_group);
1970 struct target_core_configfs_attribute *tc_attr = container_of(
1971 attr, struct target_core_configfs_attribute, attr);
1972
1973 if (!tc_attr->store)
1974 return -EINVAL;
1975
1976 return tc_attr->store(dev, page, count);
1977 }
1978
1979 static struct configfs_item_operations target_core_dev_item_ops = {
1980 .release = target_core_dev_release,
1981 .show_attribute = target_core_dev_show,
1982 .store_attribute = target_core_dev_store,
1983 };
1984
1985 static struct config_item_type target_core_dev_cit = {
1986 .ct_item_ops = &target_core_dev_item_ops,
1987 .ct_attrs = lio_core_dev_attrs,
1988 .ct_owner = THIS_MODULE,
1989 };
1990
1991 /* End functions for struct config_item_type target_core_dev_cit */
1992
1993 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1994
1995 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1996 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1997 static struct target_core_alua_lu_gp_attribute \
1998 target_core_alua_lu_gp_##_name = \
1999 __CONFIGFS_EATTR(_name, _mode, \
2000 target_core_alua_lu_gp_show_attr_##_name, \
2001 target_core_alua_lu_gp_store_attr_##_name);
2002
2003 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2004 static struct target_core_alua_lu_gp_attribute \
2005 target_core_alua_lu_gp_##_name = \
2006 __CONFIGFS_EATTR_RO(_name, \
2007 target_core_alua_lu_gp_show_attr_##_name);
2008
2009 /*
2010 * lu_gp_id
2011 */
2012 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2013 struct t10_alua_lu_gp *lu_gp,
2014 char *page)
2015 {
2016 if (!lu_gp->lu_gp_valid_id)
2017 return 0;
2018
2019 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2020 }
2021
2022 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2023 struct t10_alua_lu_gp *lu_gp,
2024 const char *page,
2025 size_t count)
2026 {
2027 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2028 unsigned long lu_gp_id;
2029 int ret;
2030
2031 ret = kstrtoul(page, 0, &lu_gp_id);
2032 if (ret < 0) {
2033 pr_err("kstrtoul() returned %d for"
2034 " lu_gp_id\n", ret);
2035 return ret;
2036 }
2037 if (lu_gp_id > 0x0000ffff) {
2038 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2039 " 0x0000ffff\n", lu_gp_id);
2040 return -EINVAL;
2041 }
2042
2043 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2044 if (ret < 0)
2045 return -EINVAL;
2046
2047 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2048 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2049 config_item_name(&alua_lu_gp_cg->cg_item),
2050 lu_gp->lu_gp_id);
2051
2052 return count;
2053 }
2054
2055 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2056
2057 /*
2058 * members
2059 */
2060 static ssize_t target_core_alua_lu_gp_show_attr_members(
2061 struct t10_alua_lu_gp *lu_gp,
2062 char *page)
2063 {
2064 struct se_device *dev;
2065 struct se_hba *hba;
2066 struct t10_alua_lu_gp_member *lu_gp_mem;
2067 ssize_t len = 0, cur_len;
2068 unsigned char buf[LU_GROUP_NAME_BUF];
2069
2070 memset(buf, 0, LU_GROUP_NAME_BUF);
2071
2072 spin_lock(&lu_gp->lu_gp_lock);
2073 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2074 dev = lu_gp_mem->lu_gp_mem_dev;
2075 hba = dev->se_hba;
2076
2077 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2078 config_item_name(&hba->hba_group.cg_item),
2079 config_item_name(&dev->dev_group.cg_item));
2080 cur_len++; /* Extra byte for NULL terminator */
2081
2082 if ((cur_len + len) > PAGE_SIZE) {
2083 pr_warn("Ran out of lu_gp_show_attr"
2084 "_members buffer\n");
2085 break;
2086 }
2087 memcpy(page+len, buf, cur_len);
2088 len += cur_len;
2089 }
2090 spin_unlock(&lu_gp->lu_gp_lock);
2091
2092 return len;
2093 }
2094
2095 SE_DEV_ALUA_LU_ATTR_RO(members);
2096
2097 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2098
2099 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2100 &target_core_alua_lu_gp_lu_gp_id.attr,
2101 &target_core_alua_lu_gp_members.attr,
2102 NULL,
2103 };
2104
2105 static void target_core_alua_lu_gp_release(struct config_item *item)
2106 {
2107 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2108 struct t10_alua_lu_gp, lu_gp_group);
2109
2110 core_alua_free_lu_gp(lu_gp);
2111 }
2112
2113 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2114 .release = target_core_alua_lu_gp_release,
2115 .show_attribute = target_core_alua_lu_gp_attr_show,
2116 .store_attribute = target_core_alua_lu_gp_attr_store,
2117 };
2118
2119 static struct config_item_type target_core_alua_lu_gp_cit = {
2120 .ct_item_ops = &target_core_alua_lu_gp_ops,
2121 .ct_attrs = target_core_alua_lu_gp_attrs,
2122 .ct_owner = THIS_MODULE,
2123 };
2124
2125 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2126
2127 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2128
2129 static struct config_group *target_core_alua_create_lu_gp(
2130 struct config_group *group,
2131 const char *name)
2132 {
2133 struct t10_alua_lu_gp *lu_gp;
2134 struct config_group *alua_lu_gp_cg = NULL;
2135 struct config_item *alua_lu_gp_ci = NULL;
2136
2137 lu_gp = core_alua_allocate_lu_gp(name, 0);
2138 if (IS_ERR(lu_gp))
2139 return NULL;
2140
2141 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2142 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2143
2144 config_group_init_type_name(alua_lu_gp_cg, name,
2145 &target_core_alua_lu_gp_cit);
2146
2147 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2148 " Group: core/alua/lu_gps/%s\n",
2149 config_item_name(alua_lu_gp_ci));
2150
2151 return alua_lu_gp_cg;
2152
2153 }
2154
2155 static void target_core_alua_drop_lu_gp(
2156 struct config_group *group,
2157 struct config_item *item)
2158 {
2159 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2160 struct t10_alua_lu_gp, lu_gp_group);
2161
2162 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2163 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2164 config_item_name(item), lu_gp->lu_gp_id);
2165 /*
2166 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2167 * -> target_core_alua_lu_gp_release()
2168 */
2169 config_item_put(item);
2170 }
2171
2172 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2173 .make_group = &target_core_alua_create_lu_gp,
2174 .drop_item = &target_core_alua_drop_lu_gp,
2175 };
2176
2177 static struct config_item_type target_core_alua_lu_gps_cit = {
2178 .ct_item_ops = NULL,
2179 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2180 .ct_owner = THIS_MODULE,
2181 };
2182
2183 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2184
2185 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2186
2187 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2188 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2189 static struct target_core_alua_tg_pt_gp_attribute \
2190 target_core_alua_tg_pt_gp_##_name = \
2191 __CONFIGFS_EATTR(_name, _mode, \
2192 target_core_alua_tg_pt_gp_show_attr_##_name, \
2193 target_core_alua_tg_pt_gp_store_attr_##_name);
2194
2195 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2196 static struct target_core_alua_tg_pt_gp_attribute \
2197 target_core_alua_tg_pt_gp_##_name = \
2198 __CONFIGFS_EATTR_RO(_name, \
2199 target_core_alua_tg_pt_gp_show_attr_##_name);
2200
2201 /*
2202 * alua_access_state
2203 */
2204 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2205 struct t10_alua_tg_pt_gp *tg_pt_gp,
2206 char *page)
2207 {
2208 return sprintf(page, "%d\n",
2209 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2210 }
2211
2212 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2213 struct t10_alua_tg_pt_gp *tg_pt_gp,
2214 const char *page,
2215 size_t count)
2216 {
2217 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2218 unsigned long tmp;
2219 int new_state, ret;
2220
2221 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2222 pr_err("Unable to do implicit ALUA on non valid"
2223 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2224 return -EINVAL;
2225 }
2226
2227 ret = kstrtoul(page, 0, &tmp);
2228 if (ret < 0) {
2229 pr_err("Unable to extract new ALUA access state from"
2230 " %s\n", page);
2231 return ret;
2232 }
2233 new_state = (int)tmp;
2234
2235 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2236 pr_err("Unable to process implicit configfs ALUA"
2237 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2238 return -EINVAL;
2239 }
2240 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2241 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2242 /* LBA DEPENDENT is only allowed with implicit ALUA */
2243 pr_err("Unable to process implicit configfs ALUA transition"
2244 " while explicit ALUA management is enabled\n");
2245 return -EINVAL;
2246 }
2247
2248 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2249 NULL, NULL, new_state, 0);
2250 return (!ret) ? count : -EINVAL;
2251 }
2252
2253 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2254
2255 /*
2256 * alua_access_status
2257 */
2258 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2259 struct t10_alua_tg_pt_gp *tg_pt_gp,
2260 char *page)
2261 {
2262 return sprintf(page, "%s\n",
2263 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2264 }
2265
2266 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2267 struct t10_alua_tg_pt_gp *tg_pt_gp,
2268 const char *page,
2269 size_t count)
2270 {
2271 unsigned long tmp;
2272 int new_status, ret;
2273
2274 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2275 pr_err("Unable to do set ALUA access status on non"
2276 " valid tg_pt_gp ID: %hu\n",
2277 tg_pt_gp->tg_pt_gp_valid_id);
2278 return -EINVAL;
2279 }
2280
2281 ret = kstrtoul(page, 0, &tmp);
2282 if (ret < 0) {
2283 pr_err("Unable to extract new ALUA access status"
2284 " from %s\n", page);
2285 return ret;
2286 }
2287 new_status = (int)tmp;
2288
2289 if ((new_status != ALUA_STATUS_NONE) &&
2290 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2291 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2292 pr_err("Illegal ALUA access status: 0x%02x\n",
2293 new_status);
2294 return -EINVAL;
2295 }
2296
2297 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2298 return count;
2299 }
2300
2301 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2302
2303 /*
2304 * alua_access_type
2305 */
2306 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2307 struct t10_alua_tg_pt_gp *tg_pt_gp,
2308 char *page)
2309 {
2310 return core_alua_show_access_type(tg_pt_gp, page);
2311 }
2312
2313 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2314 struct t10_alua_tg_pt_gp *tg_pt_gp,
2315 const char *page,
2316 size_t count)
2317 {
2318 return core_alua_store_access_type(tg_pt_gp, page, count);
2319 }
2320
2321 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2322
2323 /*
2324 * alua_supported_states
2325 */
2326
2327 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2328 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2329 struct t10_alua_tg_pt_gp *t, char *p) \
2330 { \
2331 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2332 }
2333
2334 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2335 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2336 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2337 { \
2338 unsigned long tmp; \
2339 int ret; \
2340 \
2341 if (!t->tg_pt_gp_valid_id) { \
2342 pr_err("Unable to do set ##_name ALUA state on non" \
2343 " valid tg_pt_gp ID: %hu\n", \
2344 t->tg_pt_gp_valid_id); \
2345 return -EINVAL; \
2346 } \
2347 \
2348 ret = kstrtoul(p, 0, &tmp); \
2349 if (ret < 0) { \
2350 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2351 return -EINVAL; \
2352 } \
2353 if (tmp > 1) { \
2354 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2355 return -EINVAL; \
2356 } \
2357 if (!tmp) \
2358 t->_var |= _bit; \
2359 else \
2360 t->_var &= ~_bit; \
2361 \
2362 return c; \
2363 }
2364
2365 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2366 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2367 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2368 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2369 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2370
2371 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2372 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2373 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2374 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2375 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2376
2377 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2378 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2379 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2380 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2381 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2382
2383 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2384 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2385 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2386 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2387 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2388
2389 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2390 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2391 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2392 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2393 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2394
2395 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2396 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2397 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2398 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2399 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2400
2401 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2402 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2403 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2404 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2405 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2406
2407 /*
2408 * alua_write_metadata
2409 */
2410 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2411 struct t10_alua_tg_pt_gp *tg_pt_gp,
2412 char *page)
2413 {
2414 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2415 }
2416
2417 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2418 struct t10_alua_tg_pt_gp *tg_pt_gp,
2419 const char *page,
2420 size_t count)
2421 {
2422 unsigned long tmp;
2423 int ret;
2424
2425 ret = kstrtoul(page, 0, &tmp);
2426 if (ret < 0) {
2427 pr_err("Unable to extract alua_write_metadata\n");
2428 return ret;
2429 }
2430
2431 if ((tmp != 0) && (tmp != 1)) {
2432 pr_err("Illegal value for alua_write_metadata:"
2433 " %lu\n", tmp);
2434 return -EINVAL;
2435 }
2436 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2437
2438 return count;
2439 }
2440
2441 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2442
2443
2444
2445 /*
2446 * nonop_delay_msecs
2447 */
2448 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2449 struct t10_alua_tg_pt_gp *tg_pt_gp,
2450 char *page)
2451 {
2452 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2453
2454 }
2455
2456 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2457 struct t10_alua_tg_pt_gp *tg_pt_gp,
2458 const char *page,
2459 size_t count)
2460 {
2461 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2462 }
2463
2464 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2465
2466 /*
2467 * trans_delay_msecs
2468 */
2469 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2470 struct t10_alua_tg_pt_gp *tg_pt_gp,
2471 char *page)
2472 {
2473 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2474 }
2475
2476 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2477 struct t10_alua_tg_pt_gp *tg_pt_gp,
2478 const char *page,
2479 size_t count)
2480 {
2481 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2482 }
2483
2484 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2485
2486 /*
2487 * implicit_trans_secs
2488 */
2489 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2490 struct t10_alua_tg_pt_gp *tg_pt_gp,
2491 char *page)
2492 {
2493 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2494 }
2495
2496 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2497 struct t10_alua_tg_pt_gp *tg_pt_gp,
2498 const char *page,
2499 size_t count)
2500 {
2501 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2502 }
2503
2504 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2505
2506 /*
2507 * preferred
2508 */
2509
2510 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2511 struct t10_alua_tg_pt_gp *tg_pt_gp,
2512 char *page)
2513 {
2514 return core_alua_show_preferred_bit(tg_pt_gp, page);
2515 }
2516
2517 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2518 struct t10_alua_tg_pt_gp *tg_pt_gp,
2519 const char *page,
2520 size_t count)
2521 {
2522 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2523 }
2524
2525 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2526
2527 /*
2528 * tg_pt_gp_id
2529 */
2530 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2531 struct t10_alua_tg_pt_gp *tg_pt_gp,
2532 char *page)
2533 {
2534 if (!tg_pt_gp->tg_pt_gp_valid_id)
2535 return 0;
2536
2537 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2538 }
2539
2540 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2541 struct t10_alua_tg_pt_gp *tg_pt_gp,
2542 const char *page,
2543 size_t count)
2544 {
2545 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2546 unsigned long tg_pt_gp_id;
2547 int ret;
2548
2549 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2550 if (ret < 0) {
2551 pr_err("kstrtoul() returned %d for"
2552 " tg_pt_gp_id\n", ret);
2553 return ret;
2554 }
2555 if (tg_pt_gp_id > 0x0000ffff) {
2556 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2557 " 0x0000ffff\n", tg_pt_gp_id);
2558 return -EINVAL;
2559 }
2560
2561 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2562 if (ret < 0)
2563 return -EINVAL;
2564
2565 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2566 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2567 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2568 tg_pt_gp->tg_pt_gp_id);
2569
2570 return count;
2571 }
2572
2573 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2574
2575 /*
2576 * members
2577 */
2578 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2579 struct t10_alua_tg_pt_gp *tg_pt_gp,
2580 char *page)
2581 {
2582 struct se_port *port;
2583 struct se_portal_group *tpg;
2584 struct se_lun *lun;
2585 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2586 ssize_t len = 0, cur_len;
2587 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2588
2589 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2590
2591 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2592 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2593 tg_pt_gp_mem_list) {
2594 port = tg_pt_gp_mem->tg_pt;
2595 tpg = port->sep_tpg;
2596 lun = port->sep_lun;
2597
2598 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2599 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2600 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2601 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2602 config_item_name(&lun->lun_group.cg_item));
2603 cur_len++; /* Extra byte for NULL terminator */
2604
2605 if ((cur_len + len) > PAGE_SIZE) {
2606 pr_warn("Ran out of lu_gp_show_attr"
2607 "_members buffer\n");
2608 break;
2609 }
2610 memcpy(page+len, buf, cur_len);
2611 len += cur_len;
2612 }
2613 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2614
2615 return len;
2616 }
2617
2618 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2619
2620 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2621 tg_pt_gp_group);
2622
2623 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2624 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2625 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2626 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2627 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2628 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2629 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2630 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2631 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2632 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2633 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2634 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2635 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2636 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2637 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2638 &target_core_alua_tg_pt_gp_preferred.attr,
2639 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2640 &target_core_alua_tg_pt_gp_members.attr,
2641 NULL,
2642 };
2643
2644 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2645 {
2646 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2647 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2648
2649 core_alua_free_tg_pt_gp(tg_pt_gp);
2650 }
2651
2652 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2653 .release = target_core_alua_tg_pt_gp_release,
2654 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2655 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2656 };
2657
2658 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2659 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2660 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2661 .ct_owner = THIS_MODULE,
2662 };
2663
2664 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2665
2666 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2667
2668 static struct config_group *target_core_alua_create_tg_pt_gp(
2669 struct config_group *group,
2670 const char *name)
2671 {
2672 struct t10_alua *alua = container_of(group, struct t10_alua,
2673 alua_tg_pt_gps_group);
2674 struct t10_alua_tg_pt_gp *tg_pt_gp;
2675 struct config_group *alua_tg_pt_gp_cg = NULL;
2676 struct config_item *alua_tg_pt_gp_ci = NULL;
2677
2678 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2679 if (!tg_pt_gp)
2680 return NULL;
2681
2682 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2683 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2684
2685 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2686 &target_core_alua_tg_pt_gp_cit);
2687
2688 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2689 " Group: alua/tg_pt_gps/%s\n",
2690 config_item_name(alua_tg_pt_gp_ci));
2691
2692 return alua_tg_pt_gp_cg;
2693 }
2694
2695 static void target_core_alua_drop_tg_pt_gp(
2696 struct config_group *group,
2697 struct config_item *item)
2698 {
2699 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2700 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2701
2702 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2703 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2704 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2705 /*
2706 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2707 * -> target_core_alua_tg_pt_gp_release().
2708 */
2709 config_item_put(item);
2710 }
2711
2712 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2713 .make_group = &target_core_alua_create_tg_pt_gp,
2714 .drop_item = &target_core_alua_drop_tg_pt_gp,
2715 };
2716
2717 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2718 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2719 .ct_owner = THIS_MODULE,
2720 };
2721
2722 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2723
2724 /* Start functions for struct config_item_type target_core_alua_cit */
2725
2726 /*
2727 * target_core_alua_cit is a ConfigFS group that lives under
2728 * /sys/kernel/config/target/core/alua. There are default groups
2729 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2730 * target_core_alua_cit in target_core_init_configfs() below.
2731 */
2732 static struct config_item_type target_core_alua_cit = {
2733 .ct_item_ops = NULL,
2734 .ct_attrs = NULL,
2735 .ct_owner = THIS_MODULE,
2736 };
2737
2738 /* End functions for struct config_item_type target_core_alua_cit */
2739
2740 /* Start functions for struct config_item_type target_core_stat_cit */
2741
2742 static struct config_group *target_core_stat_mkdir(
2743 struct config_group *group,
2744 const char *name)
2745 {
2746 return ERR_PTR(-ENOSYS);
2747 }
2748
2749 static void target_core_stat_rmdir(
2750 struct config_group *group,
2751 struct config_item *item)
2752 {
2753 return;
2754 }
2755
2756 static struct configfs_group_operations target_core_stat_group_ops = {
2757 .make_group = &target_core_stat_mkdir,
2758 .drop_item = &target_core_stat_rmdir,
2759 };
2760
2761 static struct config_item_type target_core_stat_cit = {
2762 .ct_group_ops = &target_core_stat_group_ops,
2763 .ct_owner = THIS_MODULE,
2764 };
2765
2766 /* End functions for struct config_item_type target_core_stat_cit */
2767
2768 /* Start functions for struct config_item_type target_core_hba_cit */
2769
2770 static struct config_group *target_core_make_subdev(
2771 struct config_group *group,
2772 const char *name)
2773 {
2774 struct t10_alua_tg_pt_gp *tg_pt_gp;
2775 struct se_subsystem_api *t;
2776 struct config_item *hba_ci = &group->cg_item;
2777 struct se_hba *hba = item_to_hba(hba_ci);
2778 struct se_device *dev;
2779 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2780 struct config_group *dev_stat_grp = NULL;
2781 int errno = -ENOMEM, ret;
2782
2783 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2784 if (ret)
2785 return ERR_PTR(ret);
2786 /*
2787 * Locate the struct se_subsystem_api from parent's struct se_hba.
2788 */
2789 t = hba->transport;
2790
2791 dev = target_alloc_device(hba, name);
2792 if (!dev)
2793 goto out_unlock;
2794
2795 dev_cg = &dev->dev_group;
2796
2797 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2798 GFP_KERNEL);
2799 if (!dev_cg->default_groups)
2800 goto out_free_device;
2801
2802 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2803 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2804 &target_core_dev_attrib_cit);
2805 config_group_init_type_name(&dev->dev_pr_group, "pr",
2806 &target_core_dev_pr_cit);
2807 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2808 &target_core_dev_wwn_cit);
2809 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2810 "alua", &target_core_alua_tg_pt_gps_cit);
2811 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2812 "statistics", &target_core_stat_cit);
2813
2814 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2815 dev_cg->default_groups[1] = &dev->dev_pr_group;
2816 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2817 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2818 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2819 dev_cg->default_groups[5] = NULL;
2820 /*
2821 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2822 */
2823 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2824 if (!tg_pt_gp)
2825 goto out_free_dev_cg_default_groups;
2826 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2827
2828 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2829 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2830 GFP_KERNEL);
2831 if (!tg_pt_gp_cg->default_groups) {
2832 pr_err("Unable to allocate tg_pt_gp_cg->"
2833 "default_groups\n");
2834 goto out_free_tg_pt_gp;
2835 }
2836
2837 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2838 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2839 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2840 tg_pt_gp_cg->default_groups[1] = NULL;
2841 /*
2842 * Add core/$HBA/$DEV/statistics/ default groups
2843 */
2844 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2845 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2846 GFP_KERNEL);
2847 if (!dev_stat_grp->default_groups) {
2848 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2849 goto out_free_tg_pt_gp_cg_default_groups;
2850 }
2851 target_stat_setup_dev_default_groups(dev);
2852
2853 mutex_unlock(&hba->hba_access_mutex);
2854 return dev_cg;
2855
2856 out_free_tg_pt_gp_cg_default_groups:
2857 kfree(tg_pt_gp_cg->default_groups);
2858 out_free_tg_pt_gp:
2859 core_alua_free_tg_pt_gp(tg_pt_gp);
2860 out_free_dev_cg_default_groups:
2861 kfree(dev_cg->default_groups);
2862 out_free_device:
2863 target_free_device(dev);
2864 out_unlock:
2865 mutex_unlock(&hba->hba_access_mutex);
2866 return ERR_PTR(errno);
2867 }
2868
2869 static void target_core_drop_subdev(
2870 struct config_group *group,
2871 struct config_item *item)
2872 {
2873 struct config_group *dev_cg = to_config_group(item);
2874 struct se_device *dev =
2875 container_of(dev_cg, struct se_device, dev_group);
2876 struct se_hba *hba;
2877 struct config_item *df_item;
2878 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2879 int i;
2880
2881 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2882
2883 mutex_lock(&hba->hba_access_mutex);
2884
2885 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2886 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2887 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2888 dev_stat_grp->default_groups[i] = NULL;
2889 config_item_put(df_item);
2890 }
2891 kfree(dev_stat_grp->default_groups);
2892
2893 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2894 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2895 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2896 tg_pt_gp_cg->default_groups[i] = NULL;
2897 config_item_put(df_item);
2898 }
2899 kfree(tg_pt_gp_cg->default_groups);
2900 /*
2901 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2902 * directly from target_core_alua_tg_pt_gp_release().
2903 */
2904 dev->t10_alua.default_tg_pt_gp = NULL;
2905
2906 for (i = 0; dev_cg->default_groups[i]; i++) {
2907 df_item = &dev_cg->default_groups[i]->cg_item;
2908 dev_cg->default_groups[i] = NULL;
2909 config_item_put(df_item);
2910 }
2911 /*
2912 * se_dev is released from target_core_dev_item_ops->release()
2913 */
2914 config_item_put(item);
2915 mutex_unlock(&hba->hba_access_mutex);
2916 }
2917
2918 static struct configfs_group_operations target_core_hba_group_ops = {
2919 .make_group = target_core_make_subdev,
2920 .drop_item = target_core_drop_subdev,
2921 };
2922
2923 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2924 #define SE_HBA_ATTR(_name, _mode) \
2925 static struct target_core_hba_attribute \
2926 target_core_hba_##_name = \
2927 __CONFIGFS_EATTR(_name, _mode, \
2928 target_core_hba_show_attr_##_name, \
2929 target_core_hba_store_attr_##_name);
2930
2931 #define SE_HBA_ATTR_RO(_name) \
2932 static struct target_core_hba_attribute \
2933 target_core_hba_##_name = \
2934 __CONFIGFS_EATTR_RO(_name, \
2935 target_core_hba_show_attr_##_name);
2936
2937 static ssize_t target_core_hba_show_attr_hba_info(
2938 struct se_hba *hba,
2939 char *page)
2940 {
2941 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2942 hba->hba_id, hba->transport->name,
2943 TARGET_CORE_CONFIGFS_VERSION);
2944 }
2945
2946 SE_HBA_ATTR_RO(hba_info);
2947
2948 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2949 char *page)
2950 {
2951 int hba_mode = 0;
2952
2953 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2954 hba_mode = 1;
2955
2956 return sprintf(page, "%d\n", hba_mode);
2957 }
2958
2959 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2960 const char *page, size_t count)
2961 {
2962 struct se_subsystem_api *transport = hba->transport;
2963 unsigned long mode_flag;
2964 int ret;
2965
2966 if (transport->pmode_enable_hba == NULL)
2967 return -EINVAL;
2968
2969 ret = kstrtoul(page, 0, &mode_flag);
2970 if (ret < 0) {
2971 pr_err("Unable to extract hba mode flag: %d\n", ret);
2972 return ret;
2973 }
2974
2975 if (hba->dev_count) {
2976 pr_err("Unable to set hba_mode with active devices\n");
2977 return -EINVAL;
2978 }
2979
2980 ret = transport->pmode_enable_hba(hba, mode_flag);
2981 if (ret < 0)
2982 return -EINVAL;
2983 if (ret > 0)
2984 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2985 else if (ret == 0)
2986 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2987
2988 return count;
2989 }
2990
2991 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2992
2993 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2994
2995 static void target_core_hba_release(struct config_item *item)
2996 {
2997 struct se_hba *hba = container_of(to_config_group(item),
2998 struct se_hba, hba_group);
2999 core_delete_hba(hba);
3000 }
3001
3002 static struct configfs_attribute *target_core_hba_attrs[] = {
3003 &target_core_hba_hba_info.attr,
3004 &target_core_hba_hba_mode.attr,
3005 NULL,
3006 };
3007
3008 static struct configfs_item_operations target_core_hba_item_ops = {
3009 .release = target_core_hba_release,
3010 .show_attribute = target_core_hba_attr_show,
3011 .store_attribute = target_core_hba_attr_store,
3012 };
3013
3014 static struct config_item_type target_core_hba_cit = {
3015 .ct_item_ops = &target_core_hba_item_ops,
3016 .ct_group_ops = &target_core_hba_group_ops,
3017 .ct_attrs = target_core_hba_attrs,
3018 .ct_owner = THIS_MODULE,
3019 };
3020
3021 static struct config_group *target_core_call_addhbatotarget(
3022 struct config_group *group,
3023 const char *name)
3024 {
3025 char *se_plugin_str, *str, *str2;
3026 struct se_hba *hba;
3027 char buf[TARGET_CORE_NAME_MAX_LEN];
3028 unsigned long plugin_dep_id = 0;
3029 int ret;
3030
3031 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3032 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3033 pr_err("Passed *name strlen(): %d exceeds"
3034 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3035 TARGET_CORE_NAME_MAX_LEN);
3036 return ERR_PTR(-ENAMETOOLONG);
3037 }
3038 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3039
3040 str = strstr(buf, "_");
3041 if (!str) {
3042 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3043 return ERR_PTR(-EINVAL);
3044 }
3045 se_plugin_str = buf;
3046 /*
3047 * Special case for subsystem plugins that have "_" in their names.
3048 * Namely rd_direct and rd_mcp..
3049 */
3050 str2 = strstr(str+1, "_");
3051 if (str2) {
3052 *str2 = '\0'; /* Terminate for *se_plugin_str */
3053 str2++; /* Skip to start of plugin dependent ID */
3054 str = str2;
3055 } else {
3056 *str = '\0'; /* Terminate for *se_plugin_str */
3057 str++; /* Skip to start of plugin dependent ID */
3058 }
3059
3060 ret = kstrtoul(str, 0, &plugin_dep_id);
3061 if (ret < 0) {
3062 pr_err("kstrtoul() returned %d for"
3063 " plugin_dep_id\n", ret);
3064 return ERR_PTR(ret);
3065 }
3066 /*
3067 * Load up TCM subsystem plugins if they have not already been loaded.
3068 */
3069 transport_subsystem_check_init();
3070
3071 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3072 if (IS_ERR(hba))
3073 return ERR_CAST(hba);
3074
3075 config_group_init_type_name(&hba->hba_group, name,
3076 &target_core_hba_cit);
3077
3078 return &hba->hba_group;
3079 }
3080
3081 static void target_core_call_delhbafromtarget(
3082 struct config_group *group,
3083 struct config_item *item)
3084 {
3085 /*
3086 * core_delete_hba() is called from target_core_hba_item_ops->release()
3087 * -> target_core_hba_release()
3088 */
3089 config_item_put(item);
3090 }
3091
3092 static struct configfs_group_operations target_core_group_ops = {
3093 .make_group = target_core_call_addhbatotarget,
3094 .drop_item = target_core_call_delhbafromtarget,
3095 };
3096
3097 static struct config_item_type target_core_cit = {
3098 .ct_item_ops = NULL,
3099 .ct_group_ops = &target_core_group_ops,
3100 .ct_attrs = NULL,
3101 .ct_owner = THIS_MODULE,
3102 };
3103
3104 /* Stop functions for struct config_item_type target_core_hba_cit */
3105
3106 static int __init target_core_init_configfs(void)
3107 {
3108 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3109 struct config_group *lu_gp_cg = NULL;
3110 struct configfs_subsystem *subsys;
3111 struct t10_alua_lu_gp *lu_gp;
3112 int ret;
3113
3114 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3115 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3116 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3117
3118 subsys = target_core_subsystem[0];
3119 config_group_init(&subsys->su_group);
3120 mutex_init(&subsys->su_mutex);
3121
3122 ret = init_se_kmem_caches();
3123 if (ret < 0)
3124 return ret;
3125 /*
3126 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3127 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3128 */
3129 target_cg = &subsys->su_group;
3130 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3131 GFP_KERNEL);
3132 if (!target_cg->default_groups) {
3133 pr_err("Unable to allocate target_cg->default_groups\n");
3134 ret = -ENOMEM;
3135 goto out_global;
3136 }
3137
3138 config_group_init_type_name(&target_core_hbagroup,
3139 "core", &target_core_cit);
3140 target_cg->default_groups[0] = &target_core_hbagroup;
3141 target_cg->default_groups[1] = NULL;
3142 /*
3143 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3144 */
3145 hba_cg = &target_core_hbagroup;
3146 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3147 GFP_KERNEL);
3148 if (!hba_cg->default_groups) {
3149 pr_err("Unable to allocate hba_cg->default_groups\n");
3150 ret = -ENOMEM;
3151 goto out_global;
3152 }
3153 config_group_init_type_name(&alua_group,
3154 "alua", &target_core_alua_cit);
3155 hba_cg->default_groups[0] = &alua_group;
3156 hba_cg->default_groups[1] = NULL;
3157 /*
3158 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3159 * groups under /sys/kernel/config/target/core/alua/
3160 */
3161 alua_cg = &alua_group;
3162 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3163 GFP_KERNEL);
3164 if (!alua_cg->default_groups) {
3165 pr_err("Unable to allocate alua_cg->default_groups\n");
3166 ret = -ENOMEM;
3167 goto out_global;
3168 }
3169
3170 config_group_init_type_name(&alua_lu_gps_group,
3171 "lu_gps", &target_core_alua_lu_gps_cit);
3172 alua_cg->default_groups[0] = &alua_lu_gps_group;
3173 alua_cg->default_groups[1] = NULL;
3174 /*
3175 * Add core/alua/lu_gps/default_lu_gp
3176 */
3177 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3178 if (IS_ERR(lu_gp)) {
3179 ret = -ENOMEM;
3180 goto out_global;
3181 }
3182
3183 lu_gp_cg = &alua_lu_gps_group;
3184 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3185 GFP_KERNEL);
3186 if (!lu_gp_cg->default_groups) {
3187 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3188 ret = -ENOMEM;
3189 goto out_global;
3190 }
3191
3192 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3193 &target_core_alua_lu_gp_cit);
3194 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3195 lu_gp_cg->default_groups[1] = NULL;
3196 default_lu_gp = lu_gp;
3197 /*
3198 * Register the target_core_mod subsystem with configfs.
3199 */
3200 ret = configfs_register_subsystem(subsys);
3201 if (ret < 0) {
3202 pr_err("Error %d while registering subsystem %s\n",
3203 ret, subsys->su_group.cg_item.ci_namebuf);
3204 goto out_global;
3205 }
3206 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3207 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3208 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3209 /*
3210 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3211 */
3212 ret = rd_module_init();
3213 if (ret < 0)
3214 goto out;
3215
3216 ret = core_dev_setup_virtual_lun0();
3217 if (ret < 0)
3218 goto out;
3219
3220 ret = target_xcopy_setup_pt();
3221 if (ret < 0)
3222 goto out;
3223
3224 return 0;
3225
3226 out:
3227 configfs_unregister_subsystem(subsys);
3228 core_dev_release_virtual_lun0();
3229 rd_module_exit();
3230 out_global:
3231 if (default_lu_gp) {
3232 core_alua_free_lu_gp(default_lu_gp);
3233 default_lu_gp = NULL;
3234 }
3235 if (lu_gp_cg)
3236 kfree(lu_gp_cg->default_groups);
3237 if (alua_cg)
3238 kfree(alua_cg->default_groups);
3239 if (hba_cg)
3240 kfree(hba_cg->default_groups);
3241 kfree(target_cg->default_groups);
3242 release_se_kmem_caches();
3243 return ret;
3244 }
3245
3246 static void __exit target_core_exit_configfs(void)
3247 {
3248 struct configfs_subsystem *subsys;
3249 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3250 struct config_item *item;
3251 int i;
3252
3253 subsys = target_core_subsystem[0];
3254
3255 lu_gp_cg = &alua_lu_gps_group;
3256 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3257 item = &lu_gp_cg->default_groups[i]->cg_item;
3258 lu_gp_cg->default_groups[i] = NULL;
3259 config_item_put(item);
3260 }
3261 kfree(lu_gp_cg->default_groups);
3262 lu_gp_cg->default_groups = NULL;
3263
3264 alua_cg = &alua_group;
3265 for (i = 0; alua_cg->default_groups[i]; i++) {
3266 item = &alua_cg->default_groups[i]->cg_item;
3267 alua_cg->default_groups[i] = NULL;
3268 config_item_put(item);
3269 }
3270 kfree(alua_cg->default_groups);
3271 alua_cg->default_groups = NULL;
3272
3273 hba_cg = &target_core_hbagroup;
3274 for (i = 0; hba_cg->default_groups[i]; i++) {
3275 item = &hba_cg->default_groups[i]->cg_item;
3276 hba_cg->default_groups[i] = NULL;
3277 config_item_put(item);
3278 }
3279 kfree(hba_cg->default_groups);
3280 hba_cg->default_groups = NULL;
3281 /*
3282 * We expect subsys->su_group.default_groups to be released
3283 * by configfs subsystem provider logic..
3284 */
3285 configfs_unregister_subsystem(subsys);
3286 kfree(subsys->su_group.default_groups);
3287
3288 core_alua_free_lu_gp(default_lu_gp);
3289 default_lu_gp = NULL;
3290
3291 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3292 " Infrastructure\n");
3293
3294 core_dev_release_virtual_lun0();
3295 rd_module_exit();
3296 target_xcopy_release_pt();
3297 release_se_kmem_caches();
3298 }
3299
3300 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3301 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3302 MODULE_LICENSE("GPL");
3303
3304 module_init(target_core_init_configfs);
3305 module_exit(target_core_exit_configfs);
Linux with added FPC-III support