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Merge tag 'mxs-fixes-3.10' of git://git.linaro.org/people/shawnguo/linux-2.6 into...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2012 RisingTide Systems LLC.
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
52 extern struct t10_alua_lu_gp *default_lu_gp;
53
54 static LIST_HEAD(g_tf_list);
55 static DEFINE_MUTEX(g_tf_lock);
56
57 struct target_core_configfs_attribute {
58 struct configfs_attribute attr;
59 ssize_t (*show)(void *, char *);
60 ssize_t (*store)(void *, const char *, size_t);
61 };
62
63 static struct config_group target_core_hbagroup;
64 static struct config_group alua_group;
65 static struct config_group alua_lu_gps_group;
66
67 static inline struct se_hba *
68 item_to_hba(struct config_item *item)
69 {
70 return container_of(to_config_group(item), struct se_hba, hba_group);
71 }
72
73 /*
74 * Attributes for /sys/kernel/config/target/
75 */
76 static ssize_t target_core_attr_show(struct config_item *item,
77 struct configfs_attribute *attr,
78 char *page)
79 {
80 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
81 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
82 utsname()->sysname, utsname()->machine);
83 }
84
85 static struct configfs_item_operations target_core_fabric_item_ops = {
86 .show_attribute = target_core_attr_show,
87 };
88
89 static struct configfs_attribute target_core_item_attr_version = {
90 .ca_owner = THIS_MODULE,
91 .ca_name = "version",
92 .ca_mode = S_IRUGO,
93 };
94
95 static struct target_fabric_configfs *target_core_get_fabric(
96 const char *name)
97 {
98 struct target_fabric_configfs *tf;
99
100 if (!name)
101 return NULL;
102
103 mutex_lock(&g_tf_lock);
104 list_for_each_entry(tf, &g_tf_list, tf_list) {
105 if (!strcmp(tf->tf_name, name)) {
106 atomic_inc(&tf->tf_access_cnt);
107 mutex_unlock(&g_tf_lock);
108 return tf;
109 }
110 }
111 mutex_unlock(&g_tf_lock);
112
113 return NULL;
114 }
115
116 /*
117 * Called from struct target_core_group_ops->make_group()
118 */
119 static struct config_group *target_core_register_fabric(
120 struct config_group *group,
121 const char *name)
122 {
123 struct target_fabric_configfs *tf;
124 int ret;
125
126 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
127 " %s\n", group, name);
128 /*
129 * Below are some hardcoded request_module() calls to automatically
130 * local fabric modules when the following is called:
131 *
132 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
133 *
134 * Note that this does not limit which TCM fabric module can be
135 * registered, but simply provids auto loading logic for modules with
136 * mkdir(2) system calls with known TCM fabric modules.
137 */
138 if (!strncmp(name, "iscsi", 5)) {
139 /*
140 * Automatically load the LIO Target fabric module when the
141 * following is called:
142 *
143 * mkdir -p $CONFIGFS/target/iscsi
144 */
145 ret = request_module("iscsi_target_mod");
146 if (ret < 0) {
147 pr_err("request_module() failed for"
148 " iscsi_target_mod.ko: %d\n", ret);
149 return ERR_PTR(-EINVAL);
150 }
151 } else if (!strncmp(name, "loopback", 8)) {
152 /*
153 * Automatically load the tcm_loop fabric module when the
154 * following is called:
155 *
156 * mkdir -p $CONFIGFS/target/loopback
157 */
158 ret = request_module("tcm_loop");
159 if (ret < 0) {
160 pr_err("request_module() failed for"
161 " tcm_loop.ko: %d\n", ret);
162 return ERR_PTR(-EINVAL);
163 }
164 }
165
166 tf = target_core_get_fabric(name);
167 if (!tf) {
168 pr_err("target_core_get_fabric() failed for %s\n",
169 name);
170 return ERR_PTR(-EINVAL);
171 }
172 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
173 " %s\n", tf->tf_name);
174 /*
175 * On a successful target_core_get_fabric() look, the returned
176 * struct target_fabric_configfs *tf will contain a usage reference.
177 */
178 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
179 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
180
181 tf->tf_group.default_groups = tf->tf_default_groups;
182 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
183 tf->tf_group.default_groups[1] = NULL;
184
185 config_group_init_type_name(&tf->tf_group, name,
186 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
187 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
188 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
189
190 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
191 " %s\n", tf->tf_group.cg_item.ci_name);
192 /*
193 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
194 */
195 tf->tf_ops.tf_subsys = tf->tf_subsys;
196 tf->tf_fabric = &tf->tf_group.cg_item;
197 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
198 " for %s\n", name);
199
200 return &tf->tf_group;
201 }
202
203 /*
204 * Called from struct target_core_group_ops->drop_item()
205 */
206 static void target_core_deregister_fabric(
207 struct config_group *group,
208 struct config_item *item)
209 {
210 struct target_fabric_configfs *tf = container_of(
211 to_config_group(item), struct target_fabric_configfs, tf_group);
212 struct config_group *tf_group;
213 struct config_item *df_item;
214 int i;
215
216 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
217 " tf list\n", config_item_name(item));
218
219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
220 " %s\n", tf->tf_name);
221 atomic_dec(&tf->tf_access_cnt);
222
223 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
224 " tf->tf_fabric for %s\n", tf->tf_name);
225 tf->tf_fabric = NULL;
226
227 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
228 " %s\n", config_item_name(item));
229
230 tf_group = &tf->tf_group;
231 for (i = 0; tf_group->default_groups[i]; i++) {
232 df_item = &tf_group->default_groups[i]->cg_item;
233 tf_group->default_groups[i] = NULL;
234 config_item_put(df_item);
235 }
236 config_item_put(item);
237 }
238
239 static struct configfs_group_operations target_core_fabric_group_ops = {
240 .make_group = &target_core_register_fabric,
241 .drop_item = &target_core_deregister_fabric,
242 };
243
244 /*
245 * All item attributes appearing in /sys/kernel/target/ appear here.
246 */
247 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
248 &target_core_item_attr_version,
249 NULL,
250 };
251
252 /*
253 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
254 */
255 static struct config_item_type target_core_fabrics_item = {
256 .ct_item_ops = &target_core_fabric_item_ops,
257 .ct_group_ops = &target_core_fabric_group_ops,
258 .ct_attrs = target_core_fabric_item_attrs,
259 .ct_owner = THIS_MODULE,
260 };
261
262 static struct configfs_subsystem target_core_fabrics = {
263 .su_group = {
264 .cg_item = {
265 .ci_namebuf = "target",
266 .ci_type = &target_core_fabrics_item,
267 },
268 },
269 };
270
271 static struct configfs_subsystem *target_core_subsystem[] = {
272 &target_core_fabrics,
273 NULL,
274 };
275
276 /*##############################################################################
277 // Start functions called by external Target Fabrics Modules
278 //############################################################################*/
279
280 /*
281 * First function called by fabric modules to:
282 *
283 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
284 * 2) Add struct target_fabric_configfs to g_tf_list
285 * 3) Return struct target_fabric_configfs to fabric module to be passed
286 * into target_fabric_configfs_register().
287 */
288 struct target_fabric_configfs *target_fabric_configfs_init(
289 struct module *fabric_mod,
290 const char *name)
291 {
292 struct target_fabric_configfs *tf;
293
294 if (!(name)) {
295 pr_err("Unable to locate passed fabric name\n");
296 return ERR_PTR(-EINVAL);
297 }
298 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
299 pr_err("Passed name: %s exceeds TARGET_FABRIC"
300 "_NAME_SIZE\n", name);
301 return ERR_PTR(-EINVAL);
302 }
303
304 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
305 if (!tf)
306 return ERR_PTR(-ENOMEM);
307
308 INIT_LIST_HEAD(&tf->tf_list);
309 atomic_set(&tf->tf_access_cnt, 0);
310 /*
311 * Setup the default generic struct config_item_type's (cits) in
312 * struct target_fabric_configfs->tf_cit_tmpl
313 */
314 tf->tf_module = fabric_mod;
315 target_fabric_setup_cits(tf);
316
317 tf->tf_subsys = target_core_subsystem[0];
318 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
319
320 mutex_lock(&g_tf_lock);
321 list_add_tail(&tf->tf_list, &g_tf_list);
322 mutex_unlock(&g_tf_lock);
323
324 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
325 ">>>>>>>>>>>>>>\n");
326 pr_debug("Initialized struct target_fabric_configfs: %p for"
327 " %s\n", tf, tf->tf_name);
328 return tf;
329 }
330 EXPORT_SYMBOL(target_fabric_configfs_init);
331
332 /*
333 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
334 */
335 void target_fabric_configfs_free(
336 struct target_fabric_configfs *tf)
337 {
338 mutex_lock(&g_tf_lock);
339 list_del(&tf->tf_list);
340 mutex_unlock(&g_tf_lock);
341
342 kfree(tf);
343 }
344 EXPORT_SYMBOL(target_fabric_configfs_free);
345
346 /*
347 * Perform a sanity check of the passed tf->tf_ops before completing
348 * TCM fabric module registration.
349 */
350 static int target_fabric_tf_ops_check(
351 struct target_fabric_configfs *tf)
352 {
353 struct target_core_fabric_ops *tfo = &tf->tf_ops;
354
355 if (!tfo->get_fabric_name) {
356 pr_err("Missing tfo->get_fabric_name()\n");
357 return -EINVAL;
358 }
359 if (!tfo->get_fabric_proto_ident) {
360 pr_err("Missing tfo->get_fabric_proto_ident()\n");
361 return -EINVAL;
362 }
363 if (!tfo->tpg_get_wwn) {
364 pr_err("Missing tfo->tpg_get_wwn()\n");
365 return -EINVAL;
366 }
367 if (!tfo->tpg_get_tag) {
368 pr_err("Missing tfo->tpg_get_tag()\n");
369 return -EINVAL;
370 }
371 if (!tfo->tpg_get_default_depth) {
372 pr_err("Missing tfo->tpg_get_default_depth()\n");
373 return -EINVAL;
374 }
375 if (!tfo->tpg_get_pr_transport_id) {
376 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
377 return -EINVAL;
378 }
379 if (!tfo->tpg_get_pr_transport_id_len) {
380 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
381 return -EINVAL;
382 }
383 if (!tfo->tpg_check_demo_mode) {
384 pr_err("Missing tfo->tpg_check_demo_mode()\n");
385 return -EINVAL;
386 }
387 if (!tfo->tpg_check_demo_mode_cache) {
388 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
389 return -EINVAL;
390 }
391 if (!tfo->tpg_check_demo_mode_write_protect) {
392 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
393 return -EINVAL;
394 }
395 if (!tfo->tpg_check_prod_mode_write_protect) {
396 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
397 return -EINVAL;
398 }
399 if (!tfo->tpg_alloc_fabric_acl) {
400 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
401 return -EINVAL;
402 }
403 if (!tfo->tpg_release_fabric_acl) {
404 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
405 return -EINVAL;
406 }
407 if (!tfo->tpg_get_inst_index) {
408 pr_err("Missing tfo->tpg_get_inst_index()\n");
409 return -EINVAL;
410 }
411 if (!tfo->release_cmd) {
412 pr_err("Missing tfo->release_cmd()\n");
413 return -EINVAL;
414 }
415 if (!tfo->shutdown_session) {
416 pr_err("Missing tfo->shutdown_session()\n");
417 return -EINVAL;
418 }
419 if (!tfo->close_session) {
420 pr_err("Missing tfo->close_session()\n");
421 return -EINVAL;
422 }
423 if (!tfo->sess_get_index) {
424 pr_err("Missing tfo->sess_get_index()\n");
425 return -EINVAL;
426 }
427 if (!tfo->write_pending) {
428 pr_err("Missing tfo->write_pending()\n");
429 return -EINVAL;
430 }
431 if (!tfo->write_pending_status) {
432 pr_err("Missing tfo->write_pending_status()\n");
433 return -EINVAL;
434 }
435 if (!tfo->set_default_node_attributes) {
436 pr_err("Missing tfo->set_default_node_attributes()\n");
437 return -EINVAL;
438 }
439 if (!tfo->get_task_tag) {
440 pr_err("Missing tfo->get_task_tag()\n");
441 return -EINVAL;
442 }
443 if (!tfo->get_cmd_state) {
444 pr_err("Missing tfo->get_cmd_state()\n");
445 return -EINVAL;
446 }
447 if (!tfo->queue_data_in) {
448 pr_err("Missing tfo->queue_data_in()\n");
449 return -EINVAL;
450 }
451 if (!tfo->queue_status) {
452 pr_err("Missing tfo->queue_status()\n");
453 return -EINVAL;
454 }
455 if (!tfo->queue_tm_rsp) {
456 pr_err("Missing tfo->queue_tm_rsp()\n");
457 return -EINVAL;
458 }
459 /*
460 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
461 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
462 * target_core_fabric_configfs.c WWN+TPG group context code.
463 */
464 if (!tfo->fabric_make_wwn) {
465 pr_err("Missing tfo->fabric_make_wwn()\n");
466 return -EINVAL;
467 }
468 if (!tfo->fabric_drop_wwn) {
469 pr_err("Missing tfo->fabric_drop_wwn()\n");
470 return -EINVAL;
471 }
472 if (!tfo->fabric_make_tpg) {
473 pr_err("Missing tfo->fabric_make_tpg()\n");
474 return -EINVAL;
475 }
476 if (!tfo->fabric_drop_tpg) {
477 pr_err("Missing tfo->fabric_drop_tpg()\n");
478 return -EINVAL;
479 }
480
481 return 0;
482 }
483
484 /*
485 * Called 2nd from fabric module with returned parameter of
486 * struct target_fabric_configfs * from target_fabric_configfs_init().
487 *
488 * Upon a successful registration, the new fabric's struct config_item is
489 * return. Also, a pointer to this struct is set in the passed
490 * struct target_fabric_configfs.
491 */
492 int target_fabric_configfs_register(
493 struct target_fabric_configfs *tf)
494 {
495 int ret;
496
497 if (!tf) {
498 pr_err("Unable to locate target_fabric_configfs"
499 " pointer\n");
500 return -EINVAL;
501 }
502 if (!tf->tf_subsys) {
503 pr_err("Unable to target struct config_subsystem"
504 " pointer\n");
505 return -EINVAL;
506 }
507 ret = target_fabric_tf_ops_check(tf);
508 if (ret < 0)
509 return ret;
510
511 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
512 ">>>>>>>>>>\n");
513 return 0;
514 }
515 EXPORT_SYMBOL(target_fabric_configfs_register);
516
517 void target_fabric_configfs_deregister(
518 struct target_fabric_configfs *tf)
519 {
520 struct configfs_subsystem *su;
521
522 if (!tf) {
523 pr_err("Unable to locate passed target_fabric_"
524 "configfs\n");
525 return;
526 }
527 su = tf->tf_subsys;
528 if (!su) {
529 pr_err("Unable to locate passed tf->tf_subsys"
530 " pointer\n");
531 return;
532 }
533 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
534 ">>>>>>>>>>>>\n");
535 mutex_lock(&g_tf_lock);
536 if (atomic_read(&tf->tf_access_cnt)) {
537 mutex_unlock(&g_tf_lock);
538 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
539 tf->tf_name);
540 BUG();
541 }
542 list_del(&tf->tf_list);
543 mutex_unlock(&g_tf_lock);
544
545 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
546 " %s\n", tf->tf_name);
547 tf->tf_module = NULL;
548 tf->tf_subsys = NULL;
549 kfree(tf);
550
551 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
552 ">>>>>\n");
553 }
554 EXPORT_SYMBOL(target_fabric_configfs_deregister);
555
556 /*##############################################################################
557 // Stop functions called by external Target Fabrics Modules
558 //############################################################################*/
559
560 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
561
562 #define DEF_DEV_ATTRIB_SHOW(_name) \
563 static ssize_t target_core_dev_show_attr_##_name( \
564 struct se_dev_attrib *da, \
565 char *page) \
566 { \
567 return snprintf(page, PAGE_SIZE, "%u\n", \
568 (u32)da->da_dev->dev_attrib._name); \
569 }
570
571 #define DEF_DEV_ATTRIB_STORE(_name) \
572 static ssize_t target_core_dev_store_attr_##_name( \
573 struct se_dev_attrib *da, \
574 const char *page, \
575 size_t count) \
576 { \
577 unsigned long val; \
578 int ret; \
579 \
580 ret = strict_strtoul(page, 0, &val); \
581 if (ret < 0) { \
582 pr_err("strict_strtoul() failed with" \
583 " ret: %d\n", ret); \
584 return -EINVAL; \
585 } \
586 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
587 \
588 return (!ret) ? count : -EINVAL; \
589 }
590
591 #define DEF_DEV_ATTRIB(_name) \
592 DEF_DEV_ATTRIB_SHOW(_name); \
593 DEF_DEV_ATTRIB_STORE(_name);
594
595 #define DEF_DEV_ATTRIB_RO(_name) \
596 DEF_DEV_ATTRIB_SHOW(_name);
597
598 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
599 #define SE_DEV_ATTR(_name, _mode) \
600 static struct target_core_dev_attrib_attribute \
601 target_core_dev_attrib_##_name = \
602 __CONFIGFS_EATTR(_name, _mode, \
603 target_core_dev_show_attr_##_name, \
604 target_core_dev_store_attr_##_name);
605
606 #define SE_DEV_ATTR_RO(_name); \
607 static struct target_core_dev_attrib_attribute \
608 target_core_dev_attrib_##_name = \
609 __CONFIGFS_EATTR_RO(_name, \
610 target_core_dev_show_attr_##_name);
611
612 DEF_DEV_ATTRIB(emulate_model_alias);
613 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
614
615 DEF_DEV_ATTRIB(emulate_dpo);
616 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
617
618 DEF_DEV_ATTRIB(emulate_fua_write);
619 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
620
621 DEF_DEV_ATTRIB(emulate_fua_read);
622 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
623
624 DEF_DEV_ATTRIB(emulate_write_cache);
625 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
626
627 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
628 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
629
630 DEF_DEV_ATTRIB(emulate_tas);
631 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
632
633 DEF_DEV_ATTRIB(emulate_tpu);
634 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
635
636 DEF_DEV_ATTRIB(emulate_tpws);
637 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
638
639 DEF_DEV_ATTRIB(enforce_pr_isids);
640 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
641
642 DEF_DEV_ATTRIB(is_nonrot);
643 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
644
645 DEF_DEV_ATTRIB(emulate_rest_reord);
646 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
647
648 DEF_DEV_ATTRIB_RO(hw_block_size);
649 SE_DEV_ATTR_RO(hw_block_size);
650
651 DEF_DEV_ATTRIB(block_size);
652 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
653
654 DEF_DEV_ATTRIB_RO(hw_max_sectors);
655 SE_DEV_ATTR_RO(hw_max_sectors);
656
657 DEF_DEV_ATTRIB(fabric_max_sectors);
658 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
659
660 DEF_DEV_ATTRIB(optimal_sectors);
661 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
662
663 DEF_DEV_ATTRIB_RO(hw_queue_depth);
664 SE_DEV_ATTR_RO(hw_queue_depth);
665
666 DEF_DEV_ATTRIB(queue_depth);
667 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
668
669 DEF_DEV_ATTRIB(max_unmap_lba_count);
670 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
671
672 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
673 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
674
675 DEF_DEV_ATTRIB(unmap_granularity);
676 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
677
678 DEF_DEV_ATTRIB(unmap_granularity_alignment);
679 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
680
681 DEF_DEV_ATTRIB(max_write_same_len);
682 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
683
684 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
685
686 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
687 &target_core_dev_attrib_emulate_model_alias.attr,
688 &target_core_dev_attrib_emulate_dpo.attr,
689 &target_core_dev_attrib_emulate_fua_write.attr,
690 &target_core_dev_attrib_emulate_fua_read.attr,
691 &target_core_dev_attrib_emulate_write_cache.attr,
692 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
693 &target_core_dev_attrib_emulate_tas.attr,
694 &target_core_dev_attrib_emulate_tpu.attr,
695 &target_core_dev_attrib_emulate_tpws.attr,
696 &target_core_dev_attrib_enforce_pr_isids.attr,
697 &target_core_dev_attrib_is_nonrot.attr,
698 &target_core_dev_attrib_emulate_rest_reord.attr,
699 &target_core_dev_attrib_hw_block_size.attr,
700 &target_core_dev_attrib_block_size.attr,
701 &target_core_dev_attrib_hw_max_sectors.attr,
702 &target_core_dev_attrib_fabric_max_sectors.attr,
703 &target_core_dev_attrib_optimal_sectors.attr,
704 &target_core_dev_attrib_hw_queue_depth.attr,
705 &target_core_dev_attrib_queue_depth.attr,
706 &target_core_dev_attrib_max_unmap_lba_count.attr,
707 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
708 &target_core_dev_attrib_unmap_granularity.attr,
709 &target_core_dev_attrib_unmap_granularity_alignment.attr,
710 &target_core_dev_attrib_max_write_same_len.attr,
711 NULL,
712 };
713
714 static struct configfs_item_operations target_core_dev_attrib_ops = {
715 .show_attribute = target_core_dev_attrib_attr_show,
716 .store_attribute = target_core_dev_attrib_attr_store,
717 };
718
719 static struct config_item_type target_core_dev_attrib_cit = {
720 .ct_item_ops = &target_core_dev_attrib_ops,
721 .ct_attrs = target_core_dev_attrib_attrs,
722 .ct_owner = THIS_MODULE,
723 };
724
725 /* End functions for struct config_item_type target_core_dev_attrib_cit */
726
727 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
728
729 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
730 #define SE_DEV_WWN_ATTR(_name, _mode) \
731 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
732 __CONFIGFS_EATTR(_name, _mode, \
733 target_core_dev_wwn_show_attr_##_name, \
734 target_core_dev_wwn_store_attr_##_name);
735
736 #define SE_DEV_WWN_ATTR_RO(_name); \
737 do { \
738 static struct target_core_dev_wwn_attribute \
739 target_core_dev_wwn_##_name = \
740 __CONFIGFS_EATTR_RO(_name, \
741 target_core_dev_wwn_show_attr_##_name); \
742 } while (0);
743
744 /*
745 * VPD page 0x80 Unit serial
746 */
747 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
748 struct t10_wwn *t10_wwn,
749 char *page)
750 {
751 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
752 &t10_wwn->unit_serial[0]);
753 }
754
755 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
756 struct t10_wwn *t10_wwn,
757 const char *page,
758 size_t count)
759 {
760 struct se_device *dev = t10_wwn->t10_dev;
761 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
762
763 /*
764 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
765 * from the struct scsi_device level firmware, do not allow
766 * VPD Unit Serial to be emulated.
767 *
768 * Note this struct scsi_device could also be emulating VPD
769 * information from its drivers/scsi LLD. But for now we assume
770 * it is doing 'the right thing' wrt a world wide unique
771 * VPD Unit Serial Number that OS dependent multipath can depend on.
772 */
773 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
774 pr_err("Underlying SCSI device firmware provided VPD"
775 " Unit Serial, ignoring request\n");
776 return -EOPNOTSUPP;
777 }
778
779 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
780 pr_err("Emulated VPD Unit Serial exceeds"
781 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
782 return -EOVERFLOW;
783 }
784 /*
785 * Check to see if any active $FABRIC_MOD exports exist. If they
786 * do exist, fail here as changing this information on the fly
787 * (underneath the initiator side OS dependent multipath code)
788 * could cause negative effects.
789 */
790 if (dev->export_count) {
791 pr_err("Unable to set VPD Unit Serial while"
792 " active %d $FABRIC_MOD exports exist\n",
793 dev->export_count);
794 return -EINVAL;
795 }
796
797 /*
798 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
799 *
800 * Also, strip any newline added from the userspace
801 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
802 */
803 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
804 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
805 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
806 "%s", strstrip(buf));
807 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
808
809 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
810 " %s\n", dev->t10_wwn.unit_serial);
811
812 return count;
813 }
814
815 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
816
817 /*
818 * VPD page 0x83 Protocol Identifier
819 */
820 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
821 struct t10_wwn *t10_wwn,
822 char *page)
823 {
824 struct t10_vpd *vpd;
825 unsigned char buf[VPD_TMP_BUF_SIZE];
826 ssize_t len = 0;
827
828 memset(buf, 0, VPD_TMP_BUF_SIZE);
829
830 spin_lock(&t10_wwn->t10_vpd_lock);
831 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
832 if (!vpd->protocol_identifier_set)
833 continue;
834
835 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
836
837 if (len + strlen(buf) >= PAGE_SIZE)
838 break;
839
840 len += sprintf(page+len, "%s", buf);
841 }
842 spin_unlock(&t10_wwn->t10_vpd_lock);
843
844 return len;
845 }
846
847 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
848 struct t10_wwn *t10_wwn,
849 const char *page,
850 size_t count)
851 {
852 return -ENOSYS;
853 }
854
855 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
856
857 /*
858 * Generic wrapper for dumping VPD identifiers by association.
859 */
860 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
861 static ssize_t target_core_dev_wwn_show_attr_##_name( \
862 struct t10_wwn *t10_wwn, \
863 char *page) \
864 { \
865 struct t10_vpd *vpd; \
866 unsigned char buf[VPD_TMP_BUF_SIZE]; \
867 ssize_t len = 0; \
868 \
869 spin_lock(&t10_wwn->t10_vpd_lock); \
870 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
871 if (vpd->association != _assoc) \
872 continue; \
873 \
874 memset(buf, 0, VPD_TMP_BUF_SIZE); \
875 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
876 if (len + strlen(buf) >= PAGE_SIZE) \
877 break; \
878 len += sprintf(page+len, "%s", buf); \
879 \
880 memset(buf, 0, VPD_TMP_BUF_SIZE); \
881 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
882 if (len + strlen(buf) >= PAGE_SIZE) \
883 break; \
884 len += sprintf(page+len, "%s", buf); \
885 \
886 memset(buf, 0, VPD_TMP_BUF_SIZE); \
887 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
888 if (len + strlen(buf) >= PAGE_SIZE) \
889 break; \
890 len += sprintf(page+len, "%s", buf); \
891 } \
892 spin_unlock(&t10_wwn->t10_vpd_lock); \
893 \
894 return len; \
895 }
896
897 /*
898 * VPD page 0x83 Association: Logical Unit
899 */
900 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
901
902 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
903 struct t10_wwn *t10_wwn,
904 const char *page,
905 size_t count)
906 {
907 return -ENOSYS;
908 }
909
910 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
911
912 /*
913 * VPD page 0x83 Association: Target Port
914 */
915 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
916
917 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
918 struct t10_wwn *t10_wwn,
919 const char *page,
920 size_t count)
921 {
922 return -ENOSYS;
923 }
924
925 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
926
927 /*
928 * VPD page 0x83 Association: SCSI Target Device
929 */
930 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
931
932 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
933 struct t10_wwn *t10_wwn,
934 const char *page,
935 size_t count)
936 {
937 return -ENOSYS;
938 }
939
940 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
941
942 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
943
944 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
945 &target_core_dev_wwn_vpd_unit_serial.attr,
946 &target_core_dev_wwn_vpd_protocol_identifier.attr,
947 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
948 &target_core_dev_wwn_vpd_assoc_target_port.attr,
949 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
950 NULL,
951 };
952
953 static struct configfs_item_operations target_core_dev_wwn_ops = {
954 .show_attribute = target_core_dev_wwn_attr_show,
955 .store_attribute = target_core_dev_wwn_attr_store,
956 };
957
958 static struct config_item_type target_core_dev_wwn_cit = {
959 .ct_item_ops = &target_core_dev_wwn_ops,
960 .ct_attrs = target_core_dev_wwn_attrs,
961 .ct_owner = THIS_MODULE,
962 };
963
964 /* End functions for struct config_item_type target_core_dev_wwn_cit */
965
966 /* Start functions for struct config_item_type target_core_dev_pr_cit */
967
968 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
969 #define SE_DEV_PR_ATTR(_name, _mode) \
970 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
971 __CONFIGFS_EATTR(_name, _mode, \
972 target_core_dev_pr_show_attr_##_name, \
973 target_core_dev_pr_store_attr_##_name);
974
975 #define SE_DEV_PR_ATTR_RO(_name); \
976 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
977 __CONFIGFS_EATTR_RO(_name, \
978 target_core_dev_pr_show_attr_##_name);
979
980 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
981 char *page)
982 {
983 struct se_node_acl *se_nacl;
984 struct t10_pr_registration *pr_reg;
985 char i_buf[PR_REG_ISID_ID_LEN];
986 int prf_isid;
987
988 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
989
990 pr_reg = dev->dev_pr_res_holder;
991 if (!pr_reg)
992 return sprintf(page, "No SPC-3 Reservation holder\n");
993
994 se_nacl = pr_reg->pr_reg_nacl;
995 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
996 PR_REG_ISID_ID_LEN);
997
998 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
999 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1000 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1001 }
1002
1003 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1004 char *page)
1005 {
1006 struct se_node_acl *se_nacl;
1007 ssize_t len;
1008
1009 se_nacl = dev->dev_reserved_node_acl;
1010 if (se_nacl) {
1011 len = sprintf(page,
1012 "SPC-2 Reservation: %s Initiator: %s\n",
1013 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1014 se_nacl->initiatorname);
1015 } else {
1016 len = sprintf(page, "No SPC-2 Reservation holder\n");
1017 }
1018 return len;
1019 }
1020
1021 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1022 char *page)
1023 {
1024 int ret;
1025
1026 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1027 return sprintf(page, "Passthrough\n");
1028
1029 spin_lock(&dev->dev_reservation_lock);
1030 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1031 ret = target_core_dev_pr_show_spc2_res(dev, page);
1032 else
1033 ret = target_core_dev_pr_show_spc3_res(dev, page);
1034 spin_unlock(&dev->dev_reservation_lock);
1035 return ret;
1036 }
1037
1038 SE_DEV_PR_ATTR_RO(res_holder);
1039
1040 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1041 struct se_device *dev, char *page)
1042 {
1043 ssize_t len = 0;
1044
1045 spin_lock(&dev->dev_reservation_lock);
1046 if (!dev->dev_pr_res_holder) {
1047 len = sprintf(page, "No SPC-3 Reservation holder\n");
1048 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1049 len = sprintf(page, "SPC-3 Reservation: All Target"
1050 " Ports registration\n");
1051 } else {
1052 len = sprintf(page, "SPC-3 Reservation: Single"
1053 " Target Port registration\n");
1054 }
1055
1056 spin_unlock(&dev->dev_reservation_lock);
1057 return len;
1058 }
1059
1060 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1061
1062 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1063 struct se_device *dev, char *page)
1064 {
1065 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1066 }
1067
1068 SE_DEV_PR_ATTR_RO(res_pr_generation);
1069
1070 /*
1071 * res_pr_holder_tg_port
1072 */
1073 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1074 struct se_device *dev, char *page)
1075 {
1076 struct se_node_acl *se_nacl;
1077 struct se_lun *lun;
1078 struct se_portal_group *se_tpg;
1079 struct t10_pr_registration *pr_reg;
1080 struct target_core_fabric_ops *tfo;
1081 ssize_t len = 0;
1082
1083 spin_lock(&dev->dev_reservation_lock);
1084 pr_reg = dev->dev_pr_res_holder;
1085 if (!pr_reg) {
1086 len = sprintf(page, "No SPC-3 Reservation holder\n");
1087 goto out_unlock;
1088 }
1089
1090 se_nacl = pr_reg->pr_reg_nacl;
1091 se_tpg = se_nacl->se_tpg;
1092 lun = pr_reg->pr_reg_tg_pt_lun;
1093 tfo = se_tpg->se_tpg_tfo;
1094
1095 len += sprintf(page+len, "SPC-3 Reservation: %s"
1096 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1097 tfo->tpg_get_wwn(se_tpg));
1098 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1099 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1100 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1101 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1102 tfo->get_fabric_name(), lun->unpacked_lun);
1103
1104 out_unlock:
1105 spin_unlock(&dev->dev_reservation_lock);
1106 return len;
1107 }
1108
1109 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1110
1111 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1112 struct se_device *dev, char *page)
1113 {
1114 struct target_core_fabric_ops *tfo;
1115 struct t10_pr_registration *pr_reg;
1116 unsigned char buf[384];
1117 char i_buf[PR_REG_ISID_ID_LEN];
1118 ssize_t len = 0;
1119 int reg_count = 0, prf_isid;
1120
1121 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1122
1123 spin_lock(&dev->t10_pr.registration_lock);
1124 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1125 pr_reg_list) {
1126
1127 memset(buf, 0, 384);
1128 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1129 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1130 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1131 PR_REG_ISID_ID_LEN);
1132 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1133 tfo->get_fabric_name(),
1134 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1135 &i_buf[0] : "", pr_reg->pr_res_key,
1136 pr_reg->pr_res_generation);
1137
1138 if (len + strlen(buf) >= PAGE_SIZE)
1139 break;
1140
1141 len += sprintf(page+len, "%s", buf);
1142 reg_count++;
1143 }
1144 spin_unlock(&dev->t10_pr.registration_lock);
1145
1146 if (!reg_count)
1147 len += sprintf(page+len, "None\n");
1148
1149 return len;
1150 }
1151
1152 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1153
1154 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1155 struct se_device *dev, char *page)
1156 {
1157 struct t10_pr_registration *pr_reg;
1158 ssize_t len = 0;
1159
1160 spin_lock(&dev->dev_reservation_lock);
1161 pr_reg = dev->dev_pr_res_holder;
1162 if (pr_reg) {
1163 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1164 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1165 } else {
1166 len = sprintf(page, "No SPC-3 Reservation holder\n");
1167 }
1168
1169 spin_unlock(&dev->dev_reservation_lock);
1170 return len;
1171 }
1172
1173 SE_DEV_PR_ATTR_RO(res_pr_type);
1174
1175 static ssize_t target_core_dev_pr_show_attr_res_type(
1176 struct se_device *dev, char *page)
1177 {
1178 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1179 return sprintf(page, "SPC_PASSTHROUGH\n");
1180 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1181 return sprintf(page, "SPC2_RESERVATIONS\n");
1182 else
1183 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1184 }
1185
1186 SE_DEV_PR_ATTR_RO(res_type);
1187
1188 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1189 struct se_device *dev, char *page)
1190 {
1191 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1192 return 0;
1193
1194 return sprintf(page, "APTPL Bit Status: %s\n",
1195 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1196 }
1197
1198 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1199
1200 /*
1201 * res_aptpl_metadata
1202 */
1203 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1204 struct se_device *dev, char *page)
1205 {
1206 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1207 return 0;
1208
1209 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1210 }
1211
1212 enum {
1213 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1214 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1215 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1216 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1217 };
1218
1219 static match_table_t tokens = {
1220 {Opt_initiator_fabric, "initiator_fabric=%s"},
1221 {Opt_initiator_node, "initiator_node=%s"},
1222 {Opt_initiator_sid, "initiator_sid=%s"},
1223 {Opt_sa_res_key, "sa_res_key=%s"},
1224 {Opt_res_holder, "res_holder=%d"},
1225 {Opt_res_type, "res_type=%d"},
1226 {Opt_res_scope, "res_scope=%d"},
1227 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1228 {Opt_mapped_lun, "mapped_lun=%d"},
1229 {Opt_target_fabric, "target_fabric=%s"},
1230 {Opt_target_node, "target_node=%s"},
1231 {Opt_tpgt, "tpgt=%d"},
1232 {Opt_port_rtpi, "port_rtpi=%d"},
1233 {Opt_target_lun, "target_lun=%d"},
1234 {Opt_err, NULL}
1235 };
1236
1237 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1238 struct se_device *dev,
1239 const char *page,
1240 size_t count)
1241 {
1242 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1243 unsigned char *t_fabric = NULL, *t_port = NULL;
1244 char *orig, *ptr, *arg_p, *opts;
1245 substring_t args[MAX_OPT_ARGS];
1246 unsigned long long tmp_ll;
1247 u64 sa_res_key = 0;
1248 u32 mapped_lun = 0, target_lun = 0;
1249 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1250 u16 port_rpti = 0, tpgt = 0;
1251 u8 type = 0, scope;
1252
1253 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1254 return 0;
1255 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1256 return 0;
1257
1258 if (dev->export_count) {
1259 pr_debug("Unable to process APTPL metadata while"
1260 " active fabric exports exist\n");
1261 return -EINVAL;
1262 }
1263
1264 opts = kstrdup(page, GFP_KERNEL);
1265 if (!opts)
1266 return -ENOMEM;
1267
1268 orig = opts;
1269 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1270 if (!*ptr)
1271 continue;
1272
1273 token = match_token(ptr, tokens, args);
1274 switch (token) {
1275 case Opt_initiator_fabric:
1276 i_fabric = match_strdup(&args[0]);
1277 if (!i_fabric) {
1278 ret = -ENOMEM;
1279 goto out;
1280 }
1281 break;
1282 case Opt_initiator_node:
1283 i_port = match_strdup(&args[0]);
1284 if (!i_port) {
1285 ret = -ENOMEM;
1286 goto out;
1287 }
1288 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1289 pr_err("APTPL metadata initiator_node="
1290 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1291 PR_APTPL_MAX_IPORT_LEN);
1292 ret = -EINVAL;
1293 break;
1294 }
1295 break;
1296 case Opt_initiator_sid:
1297 isid = match_strdup(&args[0]);
1298 if (!isid) {
1299 ret = -ENOMEM;
1300 goto out;
1301 }
1302 if (strlen(isid) >= PR_REG_ISID_LEN) {
1303 pr_err("APTPL metadata initiator_isid"
1304 "= exceeds PR_REG_ISID_LEN: %d\n",
1305 PR_REG_ISID_LEN);
1306 ret = -EINVAL;
1307 break;
1308 }
1309 break;
1310 case Opt_sa_res_key:
1311 arg_p = match_strdup(&args[0]);
1312 if (!arg_p) {
1313 ret = -ENOMEM;
1314 goto out;
1315 }
1316 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1317 if (ret < 0) {
1318 pr_err("strict_strtoull() failed for"
1319 " sa_res_key=\n");
1320 goto out;
1321 }
1322 sa_res_key = (u64)tmp_ll;
1323 break;
1324 /*
1325 * PR APTPL Metadata for Reservation
1326 */
1327 case Opt_res_holder:
1328 match_int(args, &arg);
1329 res_holder = arg;
1330 break;
1331 case Opt_res_type:
1332 match_int(args, &arg);
1333 type = (u8)arg;
1334 break;
1335 case Opt_res_scope:
1336 match_int(args, &arg);
1337 scope = (u8)arg;
1338 break;
1339 case Opt_res_all_tg_pt:
1340 match_int(args, &arg);
1341 all_tg_pt = (int)arg;
1342 break;
1343 case Opt_mapped_lun:
1344 match_int(args, &arg);
1345 mapped_lun = (u32)arg;
1346 break;
1347 /*
1348 * PR APTPL Metadata for Target Port
1349 */
1350 case Opt_target_fabric:
1351 t_fabric = match_strdup(&args[0]);
1352 if (!t_fabric) {
1353 ret = -ENOMEM;
1354 goto out;
1355 }
1356 break;
1357 case Opt_target_node:
1358 t_port = match_strdup(&args[0]);
1359 if (!t_port) {
1360 ret = -ENOMEM;
1361 goto out;
1362 }
1363 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1364 pr_err("APTPL metadata target_node="
1365 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1366 PR_APTPL_MAX_TPORT_LEN);
1367 ret = -EINVAL;
1368 break;
1369 }
1370 break;
1371 case Opt_tpgt:
1372 match_int(args, &arg);
1373 tpgt = (u16)arg;
1374 break;
1375 case Opt_port_rtpi:
1376 match_int(args, &arg);
1377 port_rpti = (u16)arg;
1378 break;
1379 case Opt_target_lun:
1380 match_int(args, &arg);
1381 target_lun = (u32)arg;
1382 break;
1383 default:
1384 break;
1385 }
1386 }
1387
1388 if (!i_port || !t_port || !sa_res_key) {
1389 pr_err("Illegal parameters for APTPL registration\n");
1390 ret = -EINVAL;
1391 goto out;
1392 }
1393
1394 if (res_holder && !(type)) {
1395 pr_err("Illegal PR type: 0x%02x for reservation"
1396 " holder\n", type);
1397 ret = -EINVAL;
1398 goto out;
1399 }
1400
1401 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1402 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1403 res_holder, all_tg_pt, type);
1404 out:
1405 kfree(i_fabric);
1406 kfree(i_port);
1407 kfree(isid);
1408 kfree(t_fabric);
1409 kfree(t_port);
1410 kfree(orig);
1411 return (ret == 0) ? count : ret;
1412 }
1413
1414 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1415
1416 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1417
1418 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1419 &target_core_dev_pr_res_holder.attr,
1420 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1421 &target_core_dev_pr_res_pr_generation.attr,
1422 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1423 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1424 &target_core_dev_pr_res_pr_type.attr,
1425 &target_core_dev_pr_res_type.attr,
1426 &target_core_dev_pr_res_aptpl_active.attr,
1427 &target_core_dev_pr_res_aptpl_metadata.attr,
1428 NULL,
1429 };
1430
1431 static struct configfs_item_operations target_core_dev_pr_ops = {
1432 .show_attribute = target_core_dev_pr_attr_show,
1433 .store_attribute = target_core_dev_pr_attr_store,
1434 };
1435
1436 static struct config_item_type target_core_dev_pr_cit = {
1437 .ct_item_ops = &target_core_dev_pr_ops,
1438 .ct_attrs = target_core_dev_pr_attrs,
1439 .ct_owner = THIS_MODULE,
1440 };
1441
1442 /* End functions for struct config_item_type target_core_dev_pr_cit */
1443
1444 /* Start functions for struct config_item_type target_core_dev_cit */
1445
1446 static ssize_t target_core_show_dev_info(void *p, char *page)
1447 {
1448 struct se_device *dev = p;
1449 struct se_subsystem_api *t = dev->transport;
1450 int bl = 0;
1451 ssize_t read_bytes = 0;
1452
1453 transport_dump_dev_state(dev, page, &bl);
1454 read_bytes += bl;
1455 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1456 return read_bytes;
1457 }
1458
1459 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1460 .attr = { .ca_owner = THIS_MODULE,
1461 .ca_name = "info",
1462 .ca_mode = S_IRUGO },
1463 .show = target_core_show_dev_info,
1464 .store = NULL,
1465 };
1466
1467 static ssize_t target_core_store_dev_control(
1468 void *p,
1469 const char *page,
1470 size_t count)
1471 {
1472 struct se_device *dev = p;
1473 struct se_subsystem_api *t = dev->transport;
1474
1475 return t->set_configfs_dev_params(dev, page, count);
1476 }
1477
1478 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1479 .attr = { .ca_owner = THIS_MODULE,
1480 .ca_name = "control",
1481 .ca_mode = S_IWUSR },
1482 .show = NULL,
1483 .store = target_core_store_dev_control,
1484 };
1485
1486 static ssize_t target_core_show_dev_alias(void *p, char *page)
1487 {
1488 struct se_device *dev = p;
1489
1490 if (!(dev->dev_flags & DF_USING_ALIAS))
1491 return 0;
1492
1493 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1494 }
1495
1496 static ssize_t target_core_store_dev_alias(
1497 void *p,
1498 const char *page,
1499 size_t count)
1500 {
1501 struct se_device *dev = p;
1502 struct se_hba *hba = dev->se_hba;
1503 ssize_t read_bytes;
1504
1505 if (count > (SE_DEV_ALIAS_LEN-1)) {
1506 pr_err("alias count: %d exceeds"
1507 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1508 SE_DEV_ALIAS_LEN-1);
1509 return -EINVAL;
1510 }
1511
1512 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1513 if (!read_bytes)
1514 return -EINVAL;
1515 if (dev->dev_alias[read_bytes - 1] == '\n')
1516 dev->dev_alias[read_bytes - 1] = '\0';
1517
1518 dev->dev_flags |= DF_USING_ALIAS;
1519
1520 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1521 config_item_name(&hba->hba_group.cg_item),
1522 config_item_name(&dev->dev_group.cg_item),
1523 dev->dev_alias);
1524
1525 return read_bytes;
1526 }
1527
1528 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1529 .attr = { .ca_owner = THIS_MODULE,
1530 .ca_name = "alias",
1531 .ca_mode = S_IRUGO | S_IWUSR },
1532 .show = target_core_show_dev_alias,
1533 .store = target_core_store_dev_alias,
1534 };
1535
1536 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1537 {
1538 struct se_device *dev = p;
1539
1540 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1541 return 0;
1542
1543 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1544 }
1545
1546 static ssize_t target_core_store_dev_udev_path(
1547 void *p,
1548 const char *page,
1549 size_t count)
1550 {
1551 struct se_device *dev = p;
1552 struct se_hba *hba = dev->se_hba;
1553 ssize_t read_bytes;
1554
1555 if (count > (SE_UDEV_PATH_LEN-1)) {
1556 pr_err("udev_path count: %d exceeds"
1557 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1558 SE_UDEV_PATH_LEN-1);
1559 return -EINVAL;
1560 }
1561
1562 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1563 "%s", page);
1564 if (!read_bytes)
1565 return -EINVAL;
1566 if (dev->udev_path[read_bytes - 1] == '\n')
1567 dev->udev_path[read_bytes - 1] = '\0';
1568
1569 dev->dev_flags |= DF_USING_UDEV_PATH;
1570
1571 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1572 config_item_name(&hba->hba_group.cg_item),
1573 config_item_name(&dev->dev_group.cg_item),
1574 dev->udev_path);
1575
1576 return read_bytes;
1577 }
1578
1579 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1580 .attr = { .ca_owner = THIS_MODULE,
1581 .ca_name = "udev_path",
1582 .ca_mode = S_IRUGO | S_IWUSR },
1583 .show = target_core_show_dev_udev_path,
1584 .store = target_core_store_dev_udev_path,
1585 };
1586
1587 static ssize_t target_core_show_dev_enable(void *p, char *page)
1588 {
1589 struct se_device *dev = p;
1590
1591 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1592 }
1593
1594 static ssize_t target_core_store_dev_enable(
1595 void *p,
1596 const char *page,
1597 size_t count)
1598 {
1599 struct se_device *dev = p;
1600 char *ptr;
1601 int ret;
1602
1603 ptr = strstr(page, "1");
1604 if (!ptr) {
1605 pr_err("For dev_enable ops, only valid value"
1606 " is \"1\"\n");
1607 return -EINVAL;
1608 }
1609
1610 ret = target_configure_device(dev);
1611 if (ret)
1612 return ret;
1613 return count;
1614 }
1615
1616 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1617 .attr = { .ca_owner = THIS_MODULE,
1618 .ca_name = "enable",
1619 .ca_mode = S_IRUGO | S_IWUSR },
1620 .show = target_core_show_dev_enable,
1621 .store = target_core_store_dev_enable,
1622 };
1623
1624 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1625 {
1626 struct se_device *dev = p;
1627 struct config_item *lu_ci;
1628 struct t10_alua_lu_gp *lu_gp;
1629 struct t10_alua_lu_gp_member *lu_gp_mem;
1630 ssize_t len = 0;
1631
1632 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1633 if (!lu_gp_mem)
1634 return 0;
1635
1636 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1637 lu_gp = lu_gp_mem->lu_gp;
1638 if (lu_gp) {
1639 lu_ci = &lu_gp->lu_gp_group.cg_item;
1640 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1641 config_item_name(lu_ci), lu_gp->lu_gp_id);
1642 }
1643 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1644
1645 return len;
1646 }
1647
1648 static ssize_t target_core_store_alua_lu_gp(
1649 void *p,
1650 const char *page,
1651 size_t count)
1652 {
1653 struct se_device *dev = p;
1654 struct se_hba *hba = dev->se_hba;
1655 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1656 struct t10_alua_lu_gp_member *lu_gp_mem;
1657 unsigned char buf[LU_GROUP_NAME_BUF];
1658 int move = 0;
1659
1660 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1661 if (!lu_gp_mem)
1662 return 0;
1663
1664 if (count > LU_GROUP_NAME_BUF) {
1665 pr_err("ALUA LU Group Alias too large!\n");
1666 return -EINVAL;
1667 }
1668 memset(buf, 0, LU_GROUP_NAME_BUF);
1669 memcpy(buf, page, count);
1670 /*
1671 * Any ALUA logical unit alias besides "NULL" means we will be
1672 * making a new group association.
1673 */
1674 if (strcmp(strstrip(buf), "NULL")) {
1675 /*
1676 * core_alua_get_lu_gp_by_name() will increment reference to
1677 * struct t10_alua_lu_gp. This reference is released with
1678 * core_alua_get_lu_gp_by_name below().
1679 */
1680 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1681 if (!lu_gp_new)
1682 return -ENODEV;
1683 }
1684
1685 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1686 lu_gp = lu_gp_mem->lu_gp;
1687 if (lu_gp) {
1688 /*
1689 * Clearing an existing lu_gp association, and replacing
1690 * with NULL
1691 */
1692 if (!lu_gp_new) {
1693 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1694 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1695 " %hu\n",
1696 config_item_name(&hba->hba_group.cg_item),
1697 config_item_name(&dev->dev_group.cg_item),
1698 config_item_name(&lu_gp->lu_gp_group.cg_item),
1699 lu_gp->lu_gp_id);
1700
1701 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1702 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1703
1704 return count;
1705 }
1706 /*
1707 * Removing existing association of lu_gp_mem with lu_gp
1708 */
1709 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1710 move = 1;
1711 }
1712 /*
1713 * Associate lu_gp_mem with lu_gp_new.
1714 */
1715 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1716 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1717
1718 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1719 " core/alua/lu_gps/%s, ID: %hu\n",
1720 (move) ? "Moving" : "Adding",
1721 config_item_name(&hba->hba_group.cg_item),
1722 config_item_name(&dev->dev_group.cg_item),
1723 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1724 lu_gp_new->lu_gp_id);
1725
1726 core_alua_put_lu_gp_from_name(lu_gp_new);
1727 return count;
1728 }
1729
1730 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1731 .attr = { .ca_owner = THIS_MODULE,
1732 .ca_name = "alua_lu_gp",
1733 .ca_mode = S_IRUGO | S_IWUSR },
1734 .show = target_core_show_alua_lu_gp,
1735 .store = target_core_store_alua_lu_gp,
1736 };
1737
1738 static struct configfs_attribute *lio_core_dev_attrs[] = {
1739 &target_core_attr_dev_info.attr,
1740 &target_core_attr_dev_control.attr,
1741 &target_core_attr_dev_alias.attr,
1742 &target_core_attr_dev_udev_path.attr,
1743 &target_core_attr_dev_enable.attr,
1744 &target_core_attr_dev_alua_lu_gp.attr,
1745 NULL,
1746 };
1747
1748 static void target_core_dev_release(struct config_item *item)
1749 {
1750 struct config_group *dev_cg = to_config_group(item);
1751 struct se_device *dev =
1752 container_of(dev_cg, struct se_device, dev_group);
1753
1754 kfree(dev_cg->default_groups);
1755 target_free_device(dev);
1756 }
1757
1758 static ssize_t target_core_dev_show(struct config_item *item,
1759 struct configfs_attribute *attr,
1760 char *page)
1761 {
1762 struct config_group *dev_cg = to_config_group(item);
1763 struct se_device *dev =
1764 container_of(dev_cg, struct se_device, dev_group);
1765 struct target_core_configfs_attribute *tc_attr = container_of(
1766 attr, struct target_core_configfs_attribute, attr);
1767
1768 if (!tc_attr->show)
1769 return -EINVAL;
1770
1771 return tc_attr->show(dev, page);
1772 }
1773
1774 static ssize_t target_core_dev_store(struct config_item *item,
1775 struct configfs_attribute *attr,
1776 const char *page, size_t count)
1777 {
1778 struct config_group *dev_cg = to_config_group(item);
1779 struct se_device *dev =
1780 container_of(dev_cg, struct se_device, dev_group);
1781 struct target_core_configfs_attribute *tc_attr = container_of(
1782 attr, struct target_core_configfs_attribute, attr);
1783
1784 if (!tc_attr->store)
1785 return -EINVAL;
1786
1787 return tc_attr->store(dev, page, count);
1788 }
1789
1790 static struct configfs_item_operations target_core_dev_item_ops = {
1791 .release = target_core_dev_release,
1792 .show_attribute = target_core_dev_show,
1793 .store_attribute = target_core_dev_store,
1794 };
1795
1796 static struct config_item_type target_core_dev_cit = {
1797 .ct_item_ops = &target_core_dev_item_ops,
1798 .ct_attrs = lio_core_dev_attrs,
1799 .ct_owner = THIS_MODULE,
1800 };
1801
1802 /* End functions for struct config_item_type target_core_dev_cit */
1803
1804 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1805
1806 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1807 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1808 static struct target_core_alua_lu_gp_attribute \
1809 target_core_alua_lu_gp_##_name = \
1810 __CONFIGFS_EATTR(_name, _mode, \
1811 target_core_alua_lu_gp_show_attr_##_name, \
1812 target_core_alua_lu_gp_store_attr_##_name);
1813
1814 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1815 static struct target_core_alua_lu_gp_attribute \
1816 target_core_alua_lu_gp_##_name = \
1817 __CONFIGFS_EATTR_RO(_name, \
1818 target_core_alua_lu_gp_show_attr_##_name);
1819
1820 /*
1821 * lu_gp_id
1822 */
1823 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1824 struct t10_alua_lu_gp *lu_gp,
1825 char *page)
1826 {
1827 if (!lu_gp->lu_gp_valid_id)
1828 return 0;
1829
1830 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1831 }
1832
1833 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1834 struct t10_alua_lu_gp *lu_gp,
1835 const char *page,
1836 size_t count)
1837 {
1838 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1839 unsigned long lu_gp_id;
1840 int ret;
1841
1842 ret = strict_strtoul(page, 0, &lu_gp_id);
1843 if (ret < 0) {
1844 pr_err("strict_strtoul() returned %d for"
1845 " lu_gp_id\n", ret);
1846 return -EINVAL;
1847 }
1848 if (lu_gp_id > 0x0000ffff) {
1849 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1850 " 0x0000ffff\n", lu_gp_id);
1851 return -EINVAL;
1852 }
1853
1854 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1855 if (ret < 0)
1856 return -EINVAL;
1857
1858 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1859 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1860 config_item_name(&alua_lu_gp_cg->cg_item),
1861 lu_gp->lu_gp_id);
1862
1863 return count;
1864 }
1865
1866 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1867
1868 /*
1869 * members
1870 */
1871 static ssize_t target_core_alua_lu_gp_show_attr_members(
1872 struct t10_alua_lu_gp *lu_gp,
1873 char *page)
1874 {
1875 struct se_device *dev;
1876 struct se_hba *hba;
1877 struct t10_alua_lu_gp_member *lu_gp_mem;
1878 ssize_t len = 0, cur_len;
1879 unsigned char buf[LU_GROUP_NAME_BUF];
1880
1881 memset(buf, 0, LU_GROUP_NAME_BUF);
1882
1883 spin_lock(&lu_gp->lu_gp_lock);
1884 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1885 dev = lu_gp_mem->lu_gp_mem_dev;
1886 hba = dev->se_hba;
1887
1888 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1889 config_item_name(&hba->hba_group.cg_item),
1890 config_item_name(&dev->dev_group.cg_item));
1891 cur_len++; /* Extra byte for NULL terminator */
1892
1893 if ((cur_len + len) > PAGE_SIZE) {
1894 pr_warn("Ran out of lu_gp_show_attr"
1895 "_members buffer\n");
1896 break;
1897 }
1898 memcpy(page+len, buf, cur_len);
1899 len += cur_len;
1900 }
1901 spin_unlock(&lu_gp->lu_gp_lock);
1902
1903 return len;
1904 }
1905
1906 SE_DEV_ALUA_LU_ATTR_RO(members);
1907
1908 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1909
1910 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1911 &target_core_alua_lu_gp_lu_gp_id.attr,
1912 &target_core_alua_lu_gp_members.attr,
1913 NULL,
1914 };
1915
1916 static void target_core_alua_lu_gp_release(struct config_item *item)
1917 {
1918 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1919 struct t10_alua_lu_gp, lu_gp_group);
1920
1921 core_alua_free_lu_gp(lu_gp);
1922 }
1923
1924 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1925 .release = target_core_alua_lu_gp_release,
1926 .show_attribute = target_core_alua_lu_gp_attr_show,
1927 .store_attribute = target_core_alua_lu_gp_attr_store,
1928 };
1929
1930 static struct config_item_type target_core_alua_lu_gp_cit = {
1931 .ct_item_ops = &target_core_alua_lu_gp_ops,
1932 .ct_attrs = target_core_alua_lu_gp_attrs,
1933 .ct_owner = THIS_MODULE,
1934 };
1935
1936 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1937
1938 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1939
1940 static struct config_group *target_core_alua_create_lu_gp(
1941 struct config_group *group,
1942 const char *name)
1943 {
1944 struct t10_alua_lu_gp *lu_gp;
1945 struct config_group *alua_lu_gp_cg = NULL;
1946 struct config_item *alua_lu_gp_ci = NULL;
1947
1948 lu_gp = core_alua_allocate_lu_gp(name, 0);
1949 if (IS_ERR(lu_gp))
1950 return NULL;
1951
1952 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1953 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1954
1955 config_group_init_type_name(alua_lu_gp_cg, name,
1956 &target_core_alua_lu_gp_cit);
1957
1958 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1959 " Group: core/alua/lu_gps/%s\n",
1960 config_item_name(alua_lu_gp_ci));
1961
1962 return alua_lu_gp_cg;
1963
1964 }
1965
1966 static void target_core_alua_drop_lu_gp(
1967 struct config_group *group,
1968 struct config_item *item)
1969 {
1970 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1971 struct t10_alua_lu_gp, lu_gp_group);
1972
1973 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1974 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1975 config_item_name(item), lu_gp->lu_gp_id);
1976 /*
1977 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1978 * -> target_core_alua_lu_gp_release()
1979 */
1980 config_item_put(item);
1981 }
1982
1983 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1984 .make_group = &target_core_alua_create_lu_gp,
1985 .drop_item = &target_core_alua_drop_lu_gp,
1986 };
1987
1988 static struct config_item_type target_core_alua_lu_gps_cit = {
1989 .ct_item_ops = NULL,
1990 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1991 .ct_owner = THIS_MODULE,
1992 };
1993
1994 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1995
1996 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1997
1998 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1999 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2000 static struct target_core_alua_tg_pt_gp_attribute \
2001 target_core_alua_tg_pt_gp_##_name = \
2002 __CONFIGFS_EATTR(_name, _mode, \
2003 target_core_alua_tg_pt_gp_show_attr_##_name, \
2004 target_core_alua_tg_pt_gp_store_attr_##_name);
2005
2006 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2007 static struct target_core_alua_tg_pt_gp_attribute \
2008 target_core_alua_tg_pt_gp_##_name = \
2009 __CONFIGFS_EATTR_RO(_name, \
2010 target_core_alua_tg_pt_gp_show_attr_##_name);
2011
2012 /*
2013 * alua_access_state
2014 */
2015 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2016 struct t10_alua_tg_pt_gp *tg_pt_gp,
2017 char *page)
2018 {
2019 return sprintf(page, "%d\n",
2020 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2021 }
2022
2023 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2024 struct t10_alua_tg_pt_gp *tg_pt_gp,
2025 const char *page,
2026 size_t count)
2027 {
2028 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2029 unsigned long tmp;
2030 int new_state, ret;
2031
2032 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2033 pr_err("Unable to do implict ALUA on non valid"
2034 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2035 return -EINVAL;
2036 }
2037
2038 ret = strict_strtoul(page, 0, &tmp);
2039 if (ret < 0) {
2040 pr_err("Unable to extract new ALUA access state from"
2041 " %s\n", page);
2042 return -EINVAL;
2043 }
2044 new_state = (int)tmp;
2045
2046 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2047 pr_err("Unable to process implict configfs ALUA"
2048 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2049 return -EINVAL;
2050 }
2051
2052 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2053 NULL, NULL, new_state, 0);
2054 return (!ret) ? count : -EINVAL;
2055 }
2056
2057 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2058
2059 /*
2060 * alua_access_status
2061 */
2062 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2063 struct t10_alua_tg_pt_gp *tg_pt_gp,
2064 char *page)
2065 {
2066 return sprintf(page, "%s\n",
2067 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2068 }
2069
2070 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2071 struct t10_alua_tg_pt_gp *tg_pt_gp,
2072 const char *page,
2073 size_t count)
2074 {
2075 unsigned long tmp;
2076 int new_status, ret;
2077
2078 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2079 pr_err("Unable to do set ALUA access status on non"
2080 " valid tg_pt_gp ID: %hu\n",
2081 tg_pt_gp->tg_pt_gp_valid_id);
2082 return -EINVAL;
2083 }
2084
2085 ret = strict_strtoul(page, 0, &tmp);
2086 if (ret < 0) {
2087 pr_err("Unable to extract new ALUA access status"
2088 " from %s\n", page);
2089 return -EINVAL;
2090 }
2091 new_status = (int)tmp;
2092
2093 if ((new_status != ALUA_STATUS_NONE) &&
2094 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2095 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2096 pr_err("Illegal ALUA access status: 0x%02x\n",
2097 new_status);
2098 return -EINVAL;
2099 }
2100
2101 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2102 return count;
2103 }
2104
2105 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2106
2107 /*
2108 * alua_access_type
2109 */
2110 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2111 struct t10_alua_tg_pt_gp *tg_pt_gp,
2112 char *page)
2113 {
2114 return core_alua_show_access_type(tg_pt_gp, page);
2115 }
2116
2117 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2118 struct t10_alua_tg_pt_gp *tg_pt_gp,
2119 const char *page,
2120 size_t count)
2121 {
2122 return core_alua_store_access_type(tg_pt_gp, page, count);
2123 }
2124
2125 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2126
2127 /*
2128 * alua_write_metadata
2129 */
2130 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2131 struct t10_alua_tg_pt_gp *tg_pt_gp,
2132 char *page)
2133 {
2134 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2135 }
2136
2137 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2138 struct t10_alua_tg_pt_gp *tg_pt_gp,
2139 const char *page,
2140 size_t count)
2141 {
2142 unsigned long tmp;
2143 int ret;
2144
2145 ret = strict_strtoul(page, 0, &tmp);
2146 if (ret < 0) {
2147 pr_err("Unable to extract alua_write_metadata\n");
2148 return -EINVAL;
2149 }
2150
2151 if ((tmp != 0) && (tmp != 1)) {
2152 pr_err("Illegal value for alua_write_metadata:"
2153 " %lu\n", tmp);
2154 return -EINVAL;
2155 }
2156 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2157
2158 return count;
2159 }
2160
2161 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2162
2163
2164
2165 /*
2166 * nonop_delay_msecs
2167 */
2168 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2169 struct t10_alua_tg_pt_gp *tg_pt_gp,
2170 char *page)
2171 {
2172 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2173
2174 }
2175
2176 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2177 struct t10_alua_tg_pt_gp *tg_pt_gp,
2178 const char *page,
2179 size_t count)
2180 {
2181 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2182 }
2183
2184 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2185
2186 /*
2187 * trans_delay_msecs
2188 */
2189 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2190 struct t10_alua_tg_pt_gp *tg_pt_gp,
2191 char *page)
2192 {
2193 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2194 }
2195
2196 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2197 struct t10_alua_tg_pt_gp *tg_pt_gp,
2198 const char *page,
2199 size_t count)
2200 {
2201 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2202 }
2203
2204 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2205
2206 /*
2207 * implict_trans_secs
2208 */
2209 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2210 struct t10_alua_tg_pt_gp *tg_pt_gp,
2211 char *page)
2212 {
2213 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2214 }
2215
2216 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2217 struct t10_alua_tg_pt_gp *tg_pt_gp,
2218 const char *page,
2219 size_t count)
2220 {
2221 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2222 }
2223
2224 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2225
2226 /*
2227 * preferred
2228 */
2229
2230 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2231 struct t10_alua_tg_pt_gp *tg_pt_gp,
2232 char *page)
2233 {
2234 return core_alua_show_preferred_bit(tg_pt_gp, page);
2235 }
2236
2237 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2238 struct t10_alua_tg_pt_gp *tg_pt_gp,
2239 const char *page,
2240 size_t count)
2241 {
2242 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2243 }
2244
2245 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2246
2247 /*
2248 * tg_pt_gp_id
2249 */
2250 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2251 struct t10_alua_tg_pt_gp *tg_pt_gp,
2252 char *page)
2253 {
2254 if (!tg_pt_gp->tg_pt_gp_valid_id)
2255 return 0;
2256
2257 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2258 }
2259
2260 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2261 struct t10_alua_tg_pt_gp *tg_pt_gp,
2262 const char *page,
2263 size_t count)
2264 {
2265 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2266 unsigned long tg_pt_gp_id;
2267 int ret;
2268
2269 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2270 if (ret < 0) {
2271 pr_err("strict_strtoul() returned %d for"
2272 " tg_pt_gp_id\n", ret);
2273 return -EINVAL;
2274 }
2275 if (tg_pt_gp_id > 0x0000ffff) {
2276 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2277 " 0x0000ffff\n", tg_pt_gp_id);
2278 return -EINVAL;
2279 }
2280
2281 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2282 if (ret < 0)
2283 return -EINVAL;
2284
2285 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2286 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2287 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2288 tg_pt_gp->tg_pt_gp_id);
2289
2290 return count;
2291 }
2292
2293 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2294
2295 /*
2296 * members
2297 */
2298 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2299 struct t10_alua_tg_pt_gp *tg_pt_gp,
2300 char *page)
2301 {
2302 struct se_port *port;
2303 struct se_portal_group *tpg;
2304 struct se_lun *lun;
2305 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2306 ssize_t len = 0, cur_len;
2307 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2308
2309 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2310
2311 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2312 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2313 tg_pt_gp_mem_list) {
2314 port = tg_pt_gp_mem->tg_pt;
2315 tpg = port->sep_tpg;
2316 lun = port->sep_lun;
2317
2318 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2319 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2320 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2321 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2322 config_item_name(&lun->lun_group.cg_item));
2323 cur_len++; /* Extra byte for NULL terminator */
2324
2325 if ((cur_len + len) > PAGE_SIZE) {
2326 pr_warn("Ran out of lu_gp_show_attr"
2327 "_members buffer\n");
2328 break;
2329 }
2330 memcpy(page+len, buf, cur_len);
2331 len += cur_len;
2332 }
2333 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2334
2335 return len;
2336 }
2337
2338 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2339
2340 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2341 tg_pt_gp_group);
2342
2343 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2344 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2345 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2346 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2347 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2348 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2349 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2350 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2351 &target_core_alua_tg_pt_gp_preferred.attr,
2352 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2353 &target_core_alua_tg_pt_gp_members.attr,
2354 NULL,
2355 };
2356
2357 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2358 {
2359 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2360 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2361
2362 core_alua_free_tg_pt_gp(tg_pt_gp);
2363 }
2364
2365 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2366 .release = target_core_alua_tg_pt_gp_release,
2367 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2368 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2369 };
2370
2371 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2372 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2373 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2374 .ct_owner = THIS_MODULE,
2375 };
2376
2377 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2378
2379 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2380
2381 static struct config_group *target_core_alua_create_tg_pt_gp(
2382 struct config_group *group,
2383 const char *name)
2384 {
2385 struct t10_alua *alua = container_of(group, struct t10_alua,
2386 alua_tg_pt_gps_group);
2387 struct t10_alua_tg_pt_gp *tg_pt_gp;
2388 struct config_group *alua_tg_pt_gp_cg = NULL;
2389 struct config_item *alua_tg_pt_gp_ci = NULL;
2390
2391 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2392 if (!tg_pt_gp)
2393 return NULL;
2394
2395 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2396 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2397
2398 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2399 &target_core_alua_tg_pt_gp_cit);
2400
2401 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2402 " Group: alua/tg_pt_gps/%s\n",
2403 config_item_name(alua_tg_pt_gp_ci));
2404
2405 return alua_tg_pt_gp_cg;
2406 }
2407
2408 static void target_core_alua_drop_tg_pt_gp(
2409 struct config_group *group,
2410 struct config_item *item)
2411 {
2412 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2413 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2414
2415 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2416 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2417 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2418 /*
2419 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2420 * -> target_core_alua_tg_pt_gp_release().
2421 */
2422 config_item_put(item);
2423 }
2424
2425 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2426 .make_group = &target_core_alua_create_tg_pt_gp,
2427 .drop_item = &target_core_alua_drop_tg_pt_gp,
2428 };
2429
2430 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2431 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2432 .ct_owner = THIS_MODULE,
2433 };
2434
2435 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2436
2437 /* Start functions for struct config_item_type target_core_alua_cit */
2438
2439 /*
2440 * target_core_alua_cit is a ConfigFS group that lives under
2441 * /sys/kernel/config/target/core/alua. There are default groups
2442 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2443 * target_core_alua_cit in target_core_init_configfs() below.
2444 */
2445 static struct config_item_type target_core_alua_cit = {
2446 .ct_item_ops = NULL,
2447 .ct_attrs = NULL,
2448 .ct_owner = THIS_MODULE,
2449 };
2450
2451 /* End functions for struct config_item_type target_core_alua_cit */
2452
2453 /* Start functions for struct config_item_type target_core_stat_cit */
2454
2455 static struct config_group *target_core_stat_mkdir(
2456 struct config_group *group,
2457 const char *name)
2458 {
2459 return ERR_PTR(-ENOSYS);
2460 }
2461
2462 static void target_core_stat_rmdir(
2463 struct config_group *group,
2464 struct config_item *item)
2465 {
2466 return;
2467 }
2468
2469 static struct configfs_group_operations target_core_stat_group_ops = {
2470 .make_group = &target_core_stat_mkdir,
2471 .drop_item = &target_core_stat_rmdir,
2472 };
2473
2474 static struct config_item_type target_core_stat_cit = {
2475 .ct_group_ops = &target_core_stat_group_ops,
2476 .ct_owner = THIS_MODULE,
2477 };
2478
2479 /* End functions for struct config_item_type target_core_stat_cit */
2480
2481 /* Start functions for struct config_item_type target_core_hba_cit */
2482
2483 static struct config_group *target_core_make_subdev(
2484 struct config_group *group,
2485 const char *name)
2486 {
2487 struct t10_alua_tg_pt_gp *tg_pt_gp;
2488 struct se_subsystem_api *t;
2489 struct config_item *hba_ci = &group->cg_item;
2490 struct se_hba *hba = item_to_hba(hba_ci);
2491 struct se_device *dev;
2492 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2493 struct config_group *dev_stat_grp = NULL;
2494 int errno = -ENOMEM, ret;
2495
2496 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2497 if (ret)
2498 return ERR_PTR(ret);
2499 /*
2500 * Locate the struct se_subsystem_api from parent's struct se_hba.
2501 */
2502 t = hba->transport;
2503
2504 dev = target_alloc_device(hba, name);
2505 if (!dev)
2506 goto out_unlock;
2507
2508 dev_cg = &dev->dev_group;
2509
2510 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2511 GFP_KERNEL);
2512 if (!dev_cg->default_groups)
2513 goto out_free_device;
2514
2515 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2516 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2517 &target_core_dev_attrib_cit);
2518 config_group_init_type_name(&dev->dev_pr_group, "pr",
2519 &target_core_dev_pr_cit);
2520 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2521 &target_core_dev_wwn_cit);
2522 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2523 "alua", &target_core_alua_tg_pt_gps_cit);
2524 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2525 "statistics", &target_core_stat_cit);
2526
2527 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2528 dev_cg->default_groups[1] = &dev->dev_pr_group;
2529 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2530 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2531 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2532 dev_cg->default_groups[5] = NULL;
2533 /*
2534 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2535 */
2536 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2537 if (!tg_pt_gp)
2538 goto out_free_dev_cg_default_groups;
2539 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2540
2541 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2542 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2543 GFP_KERNEL);
2544 if (!tg_pt_gp_cg->default_groups) {
2545 pr_err("Unable to allocate tg_pt_gp_cg->"
2546 "default_groups\n");
2547 goto out_free_tg_pt_gp;
2548 }
2549
2550 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2551 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2552 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2553 tg_pt_gp_cg->default_groups[1] = NULL;
2554 /*
2555 * Add core/$HBA/$DEV/statistics/ default groups
2556 */
2557 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2558 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2559 GFP_KERNEL);
2560 if (!dev_stat_grp->default_groups) {
2561 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2562 goto out_free_tg_pt_gp_cg_default_groups;
2563 }
2564 target_stat_setup_dev_default_groups(dev);
2565
2566 mutex_unlock(&hba->hba_access_mutex);
2567 return dev_cg;
2568
2569 out_free_tg_pt_gp_cg_default_groups:
2570 kfree(tg_pt_gp_cg->default_groups);
2571 out_free_tg_pt_gp:
2572 core_alua_free_tg_pt_gp(tg_pt_gp);
2573 out_free_dev_cg_default_groups:
2574 kfree(dev_cg->default_groups);
2575 out_free_device:
2576 target_free_device(dev);
2577 out_unlock:
2578 mutex_unlock(&hba->hba_access_mutex);
2579 return ERR_PTR(errno);
2580 }
2581
2582 static void target_core_drop_subdev(
2583 struct config_group *group,
2584 struct config_item *item)
2585 {
2586 struct config_group *dev_cg = to_config_group(item);
2587 struct se_device *dev =
2588 container_of(dev_cg, struct se_device, dev_group);
2589 struct se_hba *hba;
2590 struct config_item *df_item;
2591 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2592 int i;
2593
2594 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2595
2596 mutex_lock(&hba->hba_access_mutex);
2597
2598 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2599 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2600 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2601 dev_stat_grp->default_groups[i] = NULL;
2602 config_item_put(df_item);
2603 }
2604 kfree(dev_stat_grp->default_groups);
2605
2606 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2607 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2608 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2609 tg_pt_gp_cg->default_groups[i] = NULL;
2610 config_item_put(df_item);
2611 }
2612 kfree(tg_pt_gp_cg->default_groups);
2613 /*
2614 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2615 * directly from target_core_alua_tg_pt_gp_release().
2616 */
2617 dev->t10_alua.default_tg_pt_gp = NULL;
2618
2619 for (i = 0; dev_cg->default_groups[i]; i++) {
2620 df_item = &dev_cg->default_groups[i]->cg_item;
2621 dev_cg->default_groups[i] = NULL;
2622 config_item_put(df_item);
2623 }
2624 /*
2625 * se_dev is released from target_core_dev_item_ops->release()
2626 */
2627 config_item_put(item);
2628 mutex_unlock(&hba->hba_access_mutex);
2629 }
2630
2631 static struct configfs_group_operations target_core_hba_group_ops = {
2632 .make_group = target_core_make_subdev,
2633 .drop_item = target_core_drop_subdev,
2634 };
2635
2636 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2637 #define SE_HBA_ATTR(_name, _mode) \
2638 static struct target_core_hba_attribute \
2639 target_core_hba_##_name = \
2640 __CONFIGFS_EATTR(_name, _mode, \
2641 target_core_hba_show_attr_##_name, \
2642 target_core_hba_store_attr_##_name);
2643
2644 #define SE_HBA_ATTR_RO(_name) \
2645 static struct target_core_hba_attribute \
2646 target_core_hba_##_name = \
2647 __CONFIGFS_EATTR_RO(_name, \
2648 target_core_hba_show_attr_##_name);
2649
2650 static ssize_t target_core_hba_show_attr_hba_info(
2651 struct se_hba *hba,
2652 char *page)
2653 {
2654 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2655 hba->hba_id, hba->transport->name,
2656 TARGET_CORE_CONFIGFS_VERSION);
2657 }
2658
2659 SE_HBA_ATTR_RO(hba_info);
2660
2661 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2662 char *page)
2663 {
2664 int hba_mode = 0;
2665
2666 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2667 hba_mode = 1;
2668
2669 return sprintf(page, "%d\n", hba_mode);
2670 }
2671
2672 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2673 const char *page, size_t count)
2674 {
2675 struct se_subsystem_api *transport = hba->transport;
2676 unsigned long mode_flag;
2677 int ret;
2678
2679 if (transport->pmode_enable_hba == NULL)
2680 return -EINVAL;
2681
2682 ret = strict_strtoul(page, 0, &mode_flag);
2683 if (ret < 0) {
2684 pr_err("Unable to extract hba mode flag: %d\n", ret);
2685 return -EINVAL;
2686 }
2687
2688 if (hba->dev_count) {
2689 pr_err("Unable to set hba_mode with active devices\n");
2690 return -EINVAL;
2691 }
2692
2693 ret = transport->pmode_enable_hba(hba, mode_flag);
2694 if (ret < 0)
2695 return -EINVAL;
2696 if (ret > 0)
2697 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2698 else if (ret == 0)
2699 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2700
2701 return count;
2702 }
2703
2704 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2705
2706 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2707
2708 static void target_core_hba_release(struct config_item *item)
2709 {
2710 struct se_hba *hba = container_of(to_config_group(item),
2711 struct se_hba, hba_group);
2712 core_delete_hba(hba);
2713 }
2714
2715 static struct configfs_attribute *target_core_hba_attrs[] = {
2716 &target_core_hba_hba_info.attr,
2717 &target_core_hba_hba_mode.attr,
2718 NULL,
2719 };
2720
2721 static struct configfs_item_operations target_core_hba_item_ops = {
2722 .release = target_core_hba_release,
2723 .show_attribute = target_core_hba_attr_show,
2724 .store_attribute = target_core_hba_attr_store,
2725 };
2726
2727 static struct config_item_type target_core_hba_cit = {
2728 .ct_item_ops = &target_core_hba_item_ops,
2729 .ct_group_ops = &target_core_hba_group_ops,
2730 .ct_attrs = target_core_hba_attrs,
2731 .ct_owner = THIS_MODULE,
2732 };
2733
2734 static struct config_group *target_core_call_addhbatotarget(
2735 struct config_group *group,
2736 const char *name)
2737 {
2738 char *se_plugin_str, *str, *str2;
2739 struct se_hba *hba;
2740 char buf[TARGET_CORE_NAME_MAX_LEN];
2741 unsigned long plugin_dep_id = 0;
2742 int ret;
2743
2744 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2745 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2746 pr_err("Passed *name strlen(): %d exceeds"
2747 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2748 TARGET_CORE_NAME_MAX_LEN);
2749 return ERR_PTR(-ENAMETOOLONG);
2750 }
2751 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2752
2753 str = strstr(buf, "_");
2754 if (!str) {
2755 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2756 return ERR_PTR(-EINVAL);
2757 }
2758 se_plugin_str = buf;
2759 /*
2760 * Special case for subsystem plugins that have "_" in their names.
2761 * Namely rd_direct and rd_mcp..
2762 */
2763 str2 = strstr(str+1, "_");
2764 if (str2) {
2765 *str2 = '\0'; /* Terminate for *se_plugin_str */
2766 str2++; /* Skip to start of plugin dependent ID */
2767 str = str2;
2768 } else {
2769 *str = '\0'; /* Terminate for *se_plugin_str */
2770 str++; /* Skip to start of plugin dependent ID */
2771 }
2772
2773 ret = strict_strtoul(str, 0, &plugin_dep_id);
2774 if (ret < 0) {
2775 pr_err("strict_strtoul() returned %d for"
2776 " plugin_dep_id\n", ret);
2777 return ERR_PTR(-EINVAL);
2778 }
2779 /*
2780 * Load up TCM subsystem plugins if they have not already been loaded.
2781 */
2782 transport_subsystem_check_init();
2783
2784 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2785 if (IS_ERR(hba))
2786 return ERR_CAST(hba);
2787
2788 config_group_init_type_name(&hba->hba_group, name,
2789 &target_core_hba_cit);
2790
2791 return &hba->hba_group;
2792 }
2793
2794 static void target_core_call_delhbafromtarget(
2795 struct config_group *group,
2796 struct config_item *item)
2797 {
2798 /*
2799 * core_delete_hba() is called from target_core_hba_item_ops->release()
2800 * -> target_core_hba_release()
2801 */
2802 config_item_put(item);
2803 }
2804
2805 static struct configfs_group_operations target_core_group_ops = {
2806 .make_group = target_core_call_addhbatotarget,
2807 .drop_item = target_core_call_delhbafromtarget,
2808 };
2809
2810 static struct config_item_type target_core_cit = {
2811 .ct_item_ops = NULL,
2812 .ct_group_ops = &target_core_group_ops,
2813 .ct_attrs = NULL,
2814 .ct_owner = THIS_MODULE,
2815 };
2816
2817 /* Stop functions for struct config_item_type target_core_hba_cit */
2818
2819 static int __init target_core_init_configfs(void)
2820 {
2821 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2822 struct config_group *lu_gp_cg = NULL;
2823 struct configfs_subsystem *subsys;
2824 struct t10_alua_lu_gp *lu_gp;
2825 int ret;
2826
2827 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2828 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2829 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2830
2831 subsys = target_core_subsystem[0];
2832 config_group_init(&subsys->su_group);
2833 mutex_init(&subsys->su_mutex);
2834
2835 ret = init_se_kmem_caches();
2836 if (ret < 0)
2837 return ret;
2838 /*
2839 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2840 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2841 */
2842 target_cg = &subsys->su_group;
2843 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2844 GFP_KERNEL);
2845 if (!target_cg->default_groups) {
2846 pr_err("Unable to allocate target_cg->default_groups\n");
2847 ret = -ENOMEM;
2848 goto out_global;
2849 }
2850
2851 config_group_init_type_name(&target_core_hbagroup,
2852 "core", &target_core_cit);
2853 target_cg->default_groups[0] = &target_core_hbagroup;
2854 target_cg->default_groups[1] = NULL;
2855 /*
2856 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2857 */
2858 hba_cg = &target_core_hbagroup;
2859 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2860 GFP_KERNEL);
2861 if (!hba_cg->default_groups) {
2862 pr_err("Unable to allocate hba_cg->default_groups\n");
2863 ret = -ENOMEM;
2864 goto out_global;
2865 }
2866 config_group_init_type_name(&alua_group,
2867 "alua", &target_core_alua_cit);
2868 hba_cg->default_groups[0] = &alua_group;
2869 hba_cg->default_groups[1] = NULL;
2870 /*
2871 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2872 * groups under /sys/kernel/config/target/core/alua/
2873 */
2874 alua_cg = &alua_group;
2875 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2876 GFP_KERNEL);
2877 if (!alua_cg->default_groups) {
2878 pr_err("Unable to allocate alua_cg->default_groups\n");
2879 ret = -ENOMEM;
2880 goto out_global;
2881 }
2882
2883 config_group_init_type_name(&alua_lu_gps_group,
2884 "lu_gps", &target_core_alua_lu_gps_cit);
2885 alua_cg->default_groups[0] = &alua_lu_gps_group;
2886 alua_cg->default_groups[1] = NULL;
2887 /*
2888 * Add core/alua/lu_gps/default_lu_gp
2889 */
2890 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2891 if (IS_ERR(lu_gp)) {
2892 ret = -ENOMEM;
2893 goto out_global;
2894 }
2895
2896 lu_gp_cg = &alua_lu_gps_group;
2897 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2898 GFP_KERNEL);
2899 if (!lu_gp_cg->default_groups) {
2900 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2901 ret = -ENOMEM;
2902 goto out_global;
2903 }
2904
2905 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2906 &target_core_alua_lu_gp_cit);
2907 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2908 lu_gp_cg->default_groups[1] = NULL;
2909 default_lu_gp = lu_gp;
2910 /*
2911 * Register the target_core_mod subsystem with configfs.
2912 */
2913 ret = configfs_register_subsystem(subsys);
2914 if (ret < 0) {
2915 pr_err("Error %d while registering subsystem %s\n",
2916 ret, subsys->su_group.cg_item.ci_namebuf);
2917 goto out_global;
2918 }
2919 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2920 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2921 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2922 /*
2923 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2924 */
2925 ret = rd_module_init();
2926 if (ret < 0)
2927 goto out;
2928
2929 ret = core_dev_setup_virtual_lun0();
2930 if (ret < 0)
2931 goto out;
2932
2933 return 0;
2934
2935 out:
2936 configfs_unregister_subsystem(subsys);
2937 core_dev_release_virtual_lun0();
2938 rd_module_exit();
2939 out_global:
2940 if (default_lu_gp) {
2941 core_alua_free_lu_gp(default_lu_gp);
2942 default_lu_gp = NULL;
2943 }
2944 if (lu_gp_cg)
2945 kfree(lu_gp_cg->default_groups);
2946 if (alua_cg)
2947 kfree(alua_cg->default_groups);
2948 if (hba_cg)
2949 kfree(hba_cg->default_groups);
2950 kfree(target_cg->default_groups);
2951 release_se_kmem_caches();
2952 return ret;
2953 }
2954
2955 static void __exit target_core_exit_configfs(void)
2956 {
2957 struct configfs_subsystem *subsys;
2958 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2959 struct config_item *item;
2960 int i;
2961
2962 subsys = target_core_subsystem[0];
2963
2964 lu_gp_cg = &alua_lu_gps_group;
2965 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2966 item = &lu_gp_cg->default_groups[i]->cg_item;
2967 lu_gp_cg->default_groups[i] = NULL;
2968 config_item_put(item);
2969 }
2970 kfree(lu_gp_cg->default_groups);
2971 lu_gp_cg->default_groups = NULL;
2972
2973 alua_cg = &alua_group;
2974 for (i = 0; alua_cg->default_groups[i]; i++) {
2975 item = &alua_cg->default_groups[i]->cg_item;
2976 alua_cg->default_groups[i] = NULL;
2977 config_item_put(item);
2978 }
2979 kfree(alua_cg->default_groups);
2980 alua_cg->default_groups = NULL;
2981
2982 hba_cg = &target_core_hbagroup;
2983 for (i = 0; hba_cg->default_groups[i]; i++) {
2984 item = &hba_cg->default_groups[i]->cg_item;
2985 hba_cg->default_groups[i] = NULL;
2986 config_item_put(item);
2987 }
2988 kfree(hba_cg->default_groups);
2989 hba_cg->default_groups = NULL;
2990 /*
2991 * We expect subsys->su_group.default_groups to be released
2992 * by configfs subsystem provider logic..
2993 */
2994 configfs_unregister_subsystem(subsys);
2995 kfree(subsys->su_group.default_groups);
2996
2997 core_alua_free_lu_gp(default_lu_gp);
2998 default_lu_gp = NULL;
2999
3000 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3001 " Infrastructure\n");
3002
3003 core_dev_release_virtual_lun0();
3004 rd_module_exit();
3005 release_se_kmem_caches();
3006 }
3007
3008 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3009 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3010 MODULE_LICENSE("GPL");
3011
3012 module_init(target_core_init_configfs);
3013 module_exit(target_core_exit_configfs);
kernel source for telekom puls (alcatel/mediatek)