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Merge tag 'stable/for-linus-3.8-rc0-bugfix-tag' of git://git.kernel.org/pub/scm/linux...
[deliverable/linux.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2012 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_dpo);
613 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
614
615 DEF_DEV_ATTRIB(emulate_fua_write);
616 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
617
618 DEF_DEV_ATTRIB(emulate_fua_read);
619 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
620
621 DEF_DEV_ATTRIB(emulate_write_cache);
622 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
623
624 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
625 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
626
627 DEF_DEV_ATTRIB(emulate_tas);
628 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
629
630 DEF_DEV_ATTRIB(emulate_tpu);
631 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
632
633 DEF_DEV_ATTRIB(emulate_tpws);
634 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
635
636 DEF_DEV_ATTRIB(enforce_pr_isids);
637 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
638
639 DEF_DEV_ATTRIB(is_nonrot);
640 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
641
642 DEF_DEV_ATTRIB(emulate_rest_reord);
643 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
644
645 DEF_DEV_ATTRIB_RO(hw_block_size);
646 SE_DEV_ATTR_RO(hw_block_size);
647
648 DEF_DEV_ATTRIB(block_size);
649 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
650
651 DEF_DEV_ATTRIB_RO(hw_max_sectors);
652 SE_DEV_ATTR_RO(hw_max_sectors);
653
654 DEF_DEV_ATTRIB(fabric_max_sectors);
655 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
656
657 DEF_DEV_ATTRIB(optimal_sectors);
658 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
659
660 DEF_DEV_ATTRIB_RO(hw_queue_depth);
661 SE_DEV_ATTR_RO(hw_queue_depth);
662
663 DEF_DEV_ATTRIB(queue_depth);
664 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
665
666 DEF_DEV_ATTRIB(max_unmap_lba_count);
667 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
668
669 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
670 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
671
672 DEF_DEV_ATTRIB(unmap_granularity);
673 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
674
675 DEF_DEV_ATTRIB(unmap_granularity_alignment);
676 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
677
678 DEF_DEV_ATTRIB(max_write_same_len);
679 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
680
681 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
682
683 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
684 &target_core_dev_attrib_emulate_dpo.attr,
685 &target_core_dev_attrib_emulate_fua_write.attr,
686 &target_core_dev_attrib_emulate_fua_read.attr,
687 &target_core_dev_attrib_emulate_write_cache.attr,
688 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
689 &target_core_dev_attrib_emulate_tas.attr,
690 &target_core_dev_attrib_emulate_tpu.attr,
691 &target_core_dev_attrib_emulate_tpws.attr,
692 &target_core_dev_attrib_enforce_pr_isids.attr,
693 &target_core_dev_attrib_is_nonrot.attr,
694 &target_core_dev_attrib_emulate_rest_reord.attr,
695 &target_core_dev_attrib_hw_block_size.attr,
696 &target_core_dev_attrib_block_size.attr,
697 &target_core_dev_attrib_hw_max_sectors.attr,
698 &target_core_dev_attrib_fabric_max_sectors.attr,
699 &target_core_dev_attrib_optimal_sectors.attr,
700 &target_core_dev_attrib_hw_queue_depth.attr,
701 &target_core_dev_attrib_queue_depth.attr,
702 &target_core_dev_attrib_max_unmap_lba_count.attr,
703 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
704 &target_core_dev_attrib_unmap_granularity.attr,
705 &target_core_dev_attrib_unmap_granularity_alignment.attr,
706 &target_core_dev_attrib_max_write_same_len.attr,
707 NULL,
708 };
709
710 static struct configfs_item_operations target_core_dev_attrib_ops = {
711 .show_attribute = target_core_dev_attrib_attr_show,
712 .store_attribute = target_core_dev_attrib_attr_store,
713 };
714
715 static struct config_item_type target_core_dev_attrib_cit = {
716 .ct_item_ops = &target_core_dev_attrib_ops,
717 .ct_attrs = target_core_dev_attrib_attrs,
718 .ct_owner = THIS_MODULE,
719 };
720
721 /* End functions for struct config_item_type target_core_dev_attrib_cit */
722
723 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
724
725 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
726 #define SE_DEV_WWN_ATTR(_name, _mode) \
727 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
728 __CONFIGFS_EATTR(_name, _mode, \
729 target_core_dev_wwn_show_attr_##_name, \
730 target_core_dev_wwn_store_attr_##_name);
731
732 #define SE_DEV_WWN_ATTR_RO(_name); \
733 do { \
734 static struct target_core_dev_wwn_attribute \
735 target_core_dev_wwn_##_name = \
736 __CONFIGFS_EATTR_RO(_name, \
737 target_core_dev_wwn_show_attr_##_name); \
738 } while (0);
739
740 /*
741 * VPD page 0x80 Unit serial
742 */
743 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
744 struct t10_wwn *t10_wwn,
745 char *page)
746 {
747 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
748 &t10_wwn->unit_serial[0]);
749 }
750
751 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
752 struct t10_wwn *t10_wwn,
753 const char *page,
754 size_t count)
755 {
756 struct se_device *dev = t10_wwn->t10_dev;
757 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
758
759 /*
760 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
761 * from the struct scsi_device level firmware, do not allow
762 * VPD Unit Serial to be emulated.
763 *
764 * Note this struct scsi_device could also be emulating VPD
765 * information from its drivers/scsi LLD. But for now we assume
766 * it is doing 'the right thing' wrt a world wide unique
767 * VPD Unit Serial Number that OS dependent multipath can depend on.
768 */
769 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
770 pr_err("Underlying SCSI device firmware provided VPD"
771 " Unit Serial, ignoring request\n");
772 return -EOPNOTSUPP;
773 }
774
775 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
776 pr_err("Emulated VPD Unit Serial exceeds"
777 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
778 return -EOVERFLOW;
779 }
780 /*
781 * Check to see if any active $FABRIC_MOD exports exist. If they
782 * do exist, fail here as changing this information on the fly
783 * (underneath the initiator side OS dependent multipath code)
784 * could cause negative effects.
785 */
786 if (dev->export_count) {
787 pr_err("Unable to set VPD Unit Serial while"
788 " active %d $FABRIC_MOD exports exist\n",
789 dev->export_count);
790 return -EINVAL;
791 }
792
793 /*
794 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
795 *
796 * Also, strip any newline added from the userspace
797 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
798 */
799 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
800 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
801 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
802 "%s", strstrip(buf));
803 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
804
805 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
806 " %s\n", dev->t10_wwn.unit_serial);
807
808 return count;
809 }
810
811 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
812
813 /*
814 * VPD page 0x83 Protocol Identifier
815 */
816 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
817 struct t10_wwn *t10_wwn,
818 char *page)
819 {
820 struct t10_vpd *vpd;
821 unsigned char buf[VPD_TMP_BUF_SIZE];
822 ssize_t len = 0;
823
824 memset(buf, 0, VPD_TMP_BUF_SIZE);
825
826 spin_lock(&t10_wwn->t10_vpd_lock);
827 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
828 if (!vpd->protocol_identifier_set)
829 continue;
830
831 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
832
833 if (len + strlen(buf) >= PAGE_SIZE)
834 break;
835
836 len += sprintf(page+len, "%s", buf);
837 }
838 spin_unlock(&t10_wwn->t10_vpd_lock);
839
840 return len;
841 }
842
843 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
844 struct t10_wwn *t10_wwn,
845 const char *page,
846 size_t count)
847 {
848 return -ENOSYS;
849 }
850
851 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
852
853 /*
854 * Generic wrapper for dumping VPD identifiers by association.
855 */
856 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
857 static ssize_t target_core_dev_wwn_show_attr_##_name( \
858 struct t10_wwn *t10_wwn, \
859 char *page) \
860 { \
861 struct t10_vpd *vpd; \
862 unsigned char buf[VPD_TMP_BUF_SIZE]; \
863 ssize_t len = 0; \
864 \
865 spin_lock(&t10_wwn->t10_vpd_lock); \
866 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
867 if (vpd->association != _assoc) \
868 continue; \
869 \
870 memset(buf, 0, VPD_TMP_BUF_SIZE); \
871 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
872 if (len + strlen(buf) >= PAGE_SIZE) \
873 break; \
874 len += sprintf(page+len, "%s", buf); \
875 \
876 memset(buf, 0, VPD_TMP_BUF_SIZE); \
877 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
878 if (len + strlen(buf) >= PAGE_SIZE) \
879 break; \
880 len += sprintf(page+len, "%s", buf); \
881 \
882 memset(buf, 0, VPD_TMP_BUF_SIZE); \
883 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
884 if (len + strlen(buf) >= PAGE_SIZE) \
885 break; \
886 len += sprintf(page+len, "%s", buf); \
887 } \
888 spin_unlock(&t10_wwn->t10_vpd_lock); \
889 \
890 return len; \
891 }
892
893 /*
894 * VPD page 0x83 Association: Logical Unit
895 */
896 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
897
898 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
899 struct t10_wwn *t10_wwn,
900 const char *page,
901 size_t count)
902 {
903 return -ENOSYS;
904 }
905
906 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
907
908 /*
909 * VPD page 0x83 Association: Target Port
910 */
911 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
912
913 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
914 struct t10_wwn *t10_wwn,
915 const char *page,
916 size_t count)
917 {
918 return -ENOSYS;
919 }
920
921 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
922
923 /*
924 * VPD page 0x83 Association: SCSI Target Device
925 */
926 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
927
928 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
929 struct t10_wwn *t10_wwn,
930 const char *page,
931 size_t count)
932 {
933 return -ENOSYS;
934 }
935
936 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
937
938 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
939
940 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
941 &target_core_dev_wwn_vpd_unit_serial.attr,
942 &target_core_dev_wwn_vpd_protocol_identifier.attr,
943 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
944 &target_core_dev_wwn_vpd_assoc_target_port.attr,
945 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
946 NULL,
947 };
948
949 static struct configfs_item_operations target_core_dev_wwn_ops = {
950 .show_attribute = target_core_dev_wwn_attr_show,
951 .store_attribute = target_core_dev_wwn_attr_store,
952 };
953
954 static struct config_item_type target_core_dev_wwn_cit = {
955 .ct_item_ops = &target_core_dev_wwn_ops,
956 .ct_attrs = target_core_dev_wwn_attrs,
957 .ct_owner = THIS_MODULE,
958 };
959
960 /* End functions for struct config_item_type target_core_dev_wwn_cit */
961
962 /* Start functions for struct config_item_type target_core_dev_pr_cit */
963
964 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
965 #define SE_DEV_PR_ATTR(_name, _mode) \
966 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
967 __CONFIGFS_EATTR(_name, _mode, \
968 target_core_dev_pr_show_attr_##_name, \
969 target_core_dev_pr_store_attr_##_name);
970
971 #define SE_DEV_PR_ATTR_RO(_name); \
972 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
973 __CONFIGFS_EATTR_RO(_name, \
974 target_core_dev_pr_show_attr_##_name);
975
976 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
977 char *page)
978 {
979 struct se_node_acl *se_nacl;
980 struct t10_pr_registration *pr_reg;
981 char i_buf[PR_REG_ISID_ID_LEN];
982 int prf_isid;
983
984 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
985
986 pr_reg = dev->dev_pr_res_holder;
987 if (!pr_reg)
988 return sprintf(page, "No SPC-3 Reservation holder\n");
989
990 se_nacl = pr_reg->pr_reg_nacl;
991 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
992 PR_REG_ISID_ID_LEN);
993
994 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
995 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
996 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
997 }
998
999 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1000 char *page)
1001 {
1002 struct se_node_acl *se_nacl;
1003 ssize_t len;
1004
1005 se_nacl = dev->dev_reserved_node_acl;
1006 if (se_nacl) {
1007 len = sprintf(page,
1008 "SPC-2 Reservation: %s Initiator: %s\n",
1009 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1010 se_nacl->initiatorname);
1011 } else {
1012 len = sprintf(page, "No SPC-2 Reservation holder\n");
1013 }
1014 return len;
1015 }
1016
1017 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1018 char *page)
1019 {
1020 int ret;
1021
1022 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1023 return sprintf(page, "Passthrough\n");
1024
1025 spin_lock(&dev->dev_reservation_lock);
1026 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1027 ret = target_core_dev_pr_show_spc2_res(dev, page);
1028 else
1029 ret = target_core_dev_pr_show_spc3_res(dev, page);
1030 spin_unlock(&dev->dev_reservation_lock);
1031 return ret;
1032 }
1033
1034 SE_DEV_PR_ATTR_RO(res_holder);
1035
1036 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1037 struct se_device *dev, char *page)
1038 {
1039 ssize_t len = 0;
1040
1041 spin_lock(&dev->dev_reservation_lock);
1042 if (!dev->dev_pr_res_holder) {
1043 len = sprintf(page, "No SPC-3 Reservation holder\n");
1044 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1045 len = sprintf(page, "SPC-3 Reservation: All Target"
1046 " Ports registration\n");
1047 } else {
1048 len = sprintf(page, "SPC-3 Reservation: Single"
1049 " Target Port registration\n");
1050 }
1051
1052 spin_unlock(&dev->dev_reservation_lock);
1053 return len;
1054 }
1055
1056 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1057
1058 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1059 struct se_device *dev, char *page)
1060 {
1061 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1062 }
1063
1064 SE_DEV_PR_ATTR_RO(res_pr_generation);
1065
1066 /*
1067 * res_pr_holder_tg_port
1068 */
1069 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1070 struct se_device *dev, char *page)
1071 {
1072 struct se_node_acl *se_nacl;
1073 struct se_lun *lun;
1074 struct se_portal_group *se_tpg;
1075 struct t10_pr_registration *pr_reg;
1076 struct target_core_fabric_ops *tfo;
1077 ssize_t len = 0;
1078
1079 spin_lock(&dev->dev_reservation_lock);
1080 pr_reg = dev->dev_pr_res_holder;
1081 if (!pr_reg) {
1082 len = sprintf(page, "No SPC-3 Reservation holder\n");
1083 goto out_unlock;
1084 }
1085
1086 se_nacl = pr_reg->pr_reg_nacl;
1087 se_tpg = se_nacl->se_tpg;
1088 lun = pr_reg->pr_reg_tg_pt_lun;
1089 tfo = se_tpg->se_tpg_tfo;
1090
1091 len += sprintf(page+len, "SPC-3 Reservation: %s"
1092 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1093 tfo->tpg_get_wwn(se_tpg));
1094 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1095 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1096 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1097 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1098 tfo->get_fabric_name(), lun->unpacked_lun);
1099
1100 out_unlock:
1101 spin_unlock(&dev->dev_reservation_lock);
1102 return len;
1103 }
1104
1105 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1106
1107 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1108 struct se_device *dev, char *page)
1109 {
1110 struct target_core_fabric_ops *tfo;
1111 struct t10_pr_registration *pr_reg;
1112 unsigned char buf[384];
1113 char i_buf[PR_REG_ISID_ID_LEN];
1114 ssize_t len = 0;
1115 int reg_count = 0, prf_isid;
1116
1117 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1118
1119 spin_lock(&dev->t10_pr.registration_lock);
1120 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1121 pr_reg_list) {
1122
1123 memset(buf, 0, 384);
1124 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1125 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1126 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1127 PR_REG_ISID_ID_LEN);
1128 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1129 tfo->get_fabric_name(),
1130 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1131 &i_buf[0] : "", pr_reg->pr_res_key,
1132 pr_reg->pr_res_generation);
1133
1134 if (len + strlen(buf) >= PAGE_SIZE)
1135 break;
1136
1137 len += sprintf(page+len, "%s", buf);
1138 reg_count++;
1139 }
1140 spin_unlock(&dev->t10_pr.registration_lock);
1141
1142 if (!reg_count)
1143 len += sprintf(page+len, "None\n");
1144
1145 return len;
1146 }
1147
1148 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1149
1150 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1151 struct se_device *dev, char *page)
1152 {
1153 struct t10_pr_registration *pr_reg;
1154 ssize_t len = 0;
1155
1156 spin_lock(&dev->dev_reservation_lock);
1157 pr_reg = dev->dev_pr_res_holder;
1158 if (pr_reg) {
1159 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1160 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1161 } else {
1162 len = sprintf(page, "No SPC-3 Reservation holder\n");
1163 }
1164
1165 spin_unlock(&dev->dev_reservation_lock);
1166 return len;
1167 }
1168
1169 SE_DEV_PR_ATTR_RO(res_pr_type);
1170
1171 static ssize_t target_core_dev_pr_show_attr_res_type(
1172 struct se_device *dev, char *page)
1173 {
1174 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1175 return sprintf(page, "SPC_PASSTHROUGH\n");
1176 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1177 return sprintf(page, "SPC2_RESERVATIONS\n");
1178 else
1179 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1180 }
1181
1182 SE_DEV_PR_ATTR_RO(res_type);
1183
1184 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1185 struct se_device *dev, char *page)
1186 {
1187 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1188 return 0;
1189
1190 return sprintf(page, "APTPL Bit Status: %s\n",
1191 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1192 }
1193
1194 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1195
1196 /*
1197 * res_aptpl_metadata
1198 */
1199 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1200 struct se_device *dev, char *page)
1201 {
1202 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1203 return 0;
1204
1205 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1206 }
1207
1208 enum {
1209 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1210 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1211 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1212 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1213 };
1214
1215 static match_table_t tokens = {
1216 {Opt_initiator_fabric, "initiator_fabric=%s"},
1217 {Opt_initiator_node, "initiator_node=%s"},
1218 {Opt_initiator_sid, "initiator_sid=%s"},
1219 {Opt_sa_res_key, "sa_res_key=%s"},
1220 {Opt_res_holder, "res_holder=%d"},
1221 {Opt_res_type, "res_type=%d"},
1222 {Opt_res_scope, "res_scope=%d"},
1223 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1224 {Opt_mapped_lun, "mapped_lun=%d"},
1225 {Opt_target_fabric, "target_fabric=%s"},
1226 {Opt_target_node, "target_node=%s"},
1227 {Opt_tpgt, "tpgt=%d"},
1228 {Opt_port_rtpi, "port_rtpi=%d"},
1229 {Opt_target_lun, "target_lun=%d"},
1230 {Opt_err, NULL}
1231 };
1232
1233 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1234 struct se_device *dev,
1235 const char *page,
1236 size_t count)
1237 {
1238 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1239 unsigned char *t_fabric = NULL, *t_port = NULL;
1240 char *orig, *ptr, *arg_p, *opts;
1241 substring_t args[MAX_OPT_ARGS];
1242 unsigned long long tmp_ll;
1243 u64 sa_res_key = 0;
1244 u32 mapped_lun = 0, target_lun = 0;
1245 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1246 u16 port_rpti = 0, tpgt = 0;
1247 u8 type = 0, scope;
1248
1249 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1250 return 0;
1251 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1252 return 0;
1253
1254 if (dev->export_count) {
1255 pr_debug("Unable to process APTPL metadata while"
1256 " active fabric exports exist\n");
1257 return -EINVAL;
1258 }
1259
1260 opts = kstrdup(page, GFP_KERNEL);
1261 if (!opts)
1262 return -ENOMEM;
1263
1264 orig = opts;
1265 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1266 if (!*ptr)
1267 continue;
1268
1269 token = match_token(ptr, tokens, args);
1270 switch (token) {
1271 case Opt_initiator_fabric:
1272 i_fabric = match_strdup(&args[0]);
1273 if (!i_fabric) {
1274 ret = -ENOMEM;
1275 goto out;
1276 }
1277 break;
1278 case Opt_initiator_node:
1279 i_port = match_strdup(&args[0]);
1280 if (!i_port) {
1281 ret = -ENOMEM;
1282 goto out;
1283 }
1284 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1285 pr_err("APTPL metadata initiator_node="
1286 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1287 PR_APTPL_MAX_IPORT_LEN);
1288 ret = -EINVAL;
1289 break;
1290 }
1291 break;
1292 case Opt_initiator_sid:
1293 isid = match_strdup(&args[0]);
1294 if (!isid) {
1295 ret = -ENOMEM;
1296 goto out;
1297 }
1298 if (strlen(isid) >= PR_REG_ISID_LEN) {
1299 pr_err("APTPL metadata initiator_isid"
1300 "= exceeds PR_REG_ISID_LEN: %d\n",
1301 PR_REG_ISID_LEN);
1302 ret = -EINVAL;
1303 break;
1304 }
1305 break;
1306 case Opt_sa_res_key:
1307 arg_p = match_strdup(&args[0]);
1308 if (!arg_p) {
1309 ret = -ENOMEM;
1310 goto out;
1311 }
1312 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1313 if (ret < 0) {
1314 pr_err("strict_strtoull() failed for"
1315 " sa_res_key=\n");
1316 goto out;
1317 }
1318 sa_res_key = (u64)tmp_ll;
1319 break;
1320 /*
1321 * PR APTPL Metadata for Reservation
1322 */
1323 case Opt_res_holder:
1324 match_int(args, &arg);
1325 res_holder = arg;
1326 break;
1327 case Opt_res_type:
1328 match_int(args, &arg);
1329 type = (u8)arg;
1330 break;
1331 case Opt_res_scope:
1332 match_int(args, &arg);
1333 scope = (u8)arg;
1334 break;
1335 case Opt_res_all_tg_pt:
1336 match_int(args, &arg);
1337 all_tg_pt = (int)arg;
1338 break;
1339 case Opt_mapped_lun:
1340 match_int(args, &arg);
1341 mapped_lun = (u32)arg;
1342 break;
1343 /*
1344 * PR APTPL Metadata for Target Port
1345 */
1346 case Opt_target_fabric:
1347 t_fabric = match_strdup(&args[0]);
1348 if (!t_fabric) {
1349 ret = -ENOMEM;
1350 goto out;
1351 }
1352 break;
1353 case Opt_target_node:
1354 t_port = match_strdup(&args[0]);
1355 if (!t_port) {
1356 ret = -ENOMEM;
1357 goto out;
1358 }
1359 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1360 pr_err("APTPL metadata target_node="
1361 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1362 PR_APTPL_MAX_TPORT_LEN);
1363 ret = -EINVAL;
1364 break;
1365 }
1366 break;
1367 case Opt_tpgt:
1368 match_int(args, &arg);
1369 tpgt = (u16)arg;
1370 break;
1371 case Opt_port_rtpi:
1372 match_int(args, &arg);
1373 port_rpti = (u16)arg;
1374 break;
1375 case Opt_target_lun:
1376 match_int(args, &arg);
1377 target_lun = (u32)arg;
1378 break;
1379 default:
1380 break;
1381 }
1382 }
1383
1384 if (!i_port || !t_port || !sa_res_key) {
1385 pr_err("Illegal parameters for APTPL registration\n");
1386 ret = -EINVAL;
1387 goto out;
1388 }
1389
1390 if (res_holder && !(type)) {
1391 pr_err("Illegal PR type: 0x%02x for reservation"
1392 " holder\n", type);
1393 ret = -EINVAL;
1394 goto out;
1395 }
1396
1397 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1398 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1399 res_holder, all_tg_pt, type);
1400 out:
1401 kfree(i_fabric);
1402 kfree(i_port);
1403 kfree(isid);
1404 kfree(t_fabric);
1405 kfree(t_port);
1406 kfree(orig);
1407 return (ret == 0) ? count : ret;
1408 }
1409
1410 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1411
1412 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1413
1414 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1415 &target_core_dev_pr_res_holder.attr,
1416 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1417 &target_core_dev_pr_res_pr_generation.attr,
1418 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1419 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1420 &target_core_dev_pr_res_pr_type.attr,
1421 &target_core_dev_pr_res_type.attr,
1422 &target_core_dev_pr_res_aptpl_active.attr,
1423 &target_core_dev_pr_res_aptpl_metadata.attr,
1424 NULL,
1425 };
1426
1427 static struct configfs_item_operations target_core_dev_pr_ops = {
1428 .show_attribute = target_core_dev_pr_attr_show,
1429 .store_attribute = target_core_dev_pr_attr_store,
1430 };
1431
1432 static struct config_item_type target_core_dev_pr_cit = {
1433 .ct_item_ops = &target_core_dev_pr_ops,
1434 .ct_attrs = target_core_dev_pr_attrs,
1435 .ct_owner = THIS_MODULE,
1436 };
1437
1438 /* End functions for struct config_item_type target_core_dev_pr_cit */
1439
1440 /* Start functions for struct config_item_type target_core_dev_cit */
1441
1442 static ssize_t target_core_show_dev_info(void *p, char *page)
1443 {
1444 struct se_device *dev = p;
1445 struct se_subsystem_api *t = dev->transport;
1446 int bl = 0;
1447 ssize_t read_bytes = 0;
1448
1449 transport_dump_dev_state(dev, page, &bl);
1450 read_bytes += bl;
1451 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1452 return read_bytes;
1453 }
1454
1455 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1456 .attr = { .ca_owner = THIS_MODULE,
1457 .ca_name = "info",
1458 .ca_mode = S_IRUGO },
1459 .show = target_core_show_dev_info,
1460 .store = NULL,
1461 };
1462
1463 static ssize_t target_core_store_dev_control(
1464 void *p,
1465 const char *page,
1466 size_t count)
1467 {
1468 struct se_device *dev = p;
1469 struct se_subsystem_api *t = dev->transport;
1470
1471 return t->set_configfs_dev_params(dev, page, count);
1472 }
1473
1474 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1475 .attr = { .ca_owner = THIS_MODULE,
1476 .ca_name = "control",
1477 .ca_mode = S_IWUSR },
1478 .show = NULL,
1479 .store = target_core_store_dev_control,
1480 };
1481
1482 static ssize_t target_core_show_dev_alias(void *p, char *page)
1483 {
1484 struct se_device *dev = p;
1485
1486 if (!(dev->dev_flags & DF_USING_ALIAS))
1487 return 0;
1488
1489 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1490 }
1491
1492 static ssize_t target_core_store_dev_alias(
1493 void *p,
1494 const char *page,
1495 size_t count)
1496 {
1497 struct se_device *dev = p;
1498 struct se_hba *hba = dev->se_hba;
1499 ssize_t read_bytes;
1500
1501 if (count > (SE_DEV_ALIAS_LEN-1)) {
1502 pr_err("alias count: %d exceeds"
1503 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1504 SE_DEV_ALIAS_LEN-1);
1505 return -EINVAL;
1506 }
1507
1508 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1509 if (!read_bytes)
1510 return -EINVAL;
1511 if (dev->dev_alias[read_bytes - 1] == '\n')
1512 dev->dev_alias[read_bytes - 1] = '\0';
1513
1514 dev->dev_flags |= DF_USING_ALIAS;
1515
1516 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1517 config_item_name(&hba->hba_group.cg_item),
1518 config_item_name(&dev->dev_group.cg_item),
1519 dev->dev_alias);
1520
1521 return read_bytes;
1522 }
1523
1524 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1525 .attr = { .ca_owner = THIS_MODULE,
1526 .ca_name = "alias",
1527 .ca_mode = S_IRUGO | S_IWUSR },
1528 .show = target_core_show_dev_alias,
1529 .store = target_core_store_dev_alias,
1530 };
1531
1532 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1533 {
1534 struct se_device *dev = p;
1535
1536 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1537 return 0;
1538
1539 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1540 }
1541
1542 static ssize_t target_core_store_dev_udev_path(
1543 void *p,
1544 const char *page,
1545 size_t count)
1546 {
1547 struct se_device *dev = p;
1548 struct se_hba *hba = dev->se_hba;
1549 ssize_t read_bytes;
1550
1551 if (count > (SE_UDEV_PATH_LEN-1)) {
1552 pr_err("udev_path count: %d exceeds"
1553 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1554 SE_UDEV_PATH_LEN-1);
1555 return -EINVAL;
1556 }
1557
1558 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1559 "%s", page);
1560 if (!read_bytes)
1561 return -EINVAL;
1562 if (dev->udev_path[read_bytes - 1] == '\n')
1563 dev->udev_path[read_bytes - 1] = '\0';
1564
1565 dev->dev_flags |= DF_USING_UDEV_PATH;
1566
1567 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1568 config_item_name(&hba->hba_group.cg_item),
1569 config_item_name(&dev->dev_group.cg_item),
1570 dev->udev_path);
1571
1572 return read_bytes;
1573 }
1574
1575 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1576 .attr = { .ca_owner = THIS_MODULE,
1577 .ca_name = "udev_path",
1578 .ca_mode = S_IRUGO | S_IWUSR },
1579 .show = target_core_show_dev_udev_path,
1580 .store = target_core_store_dev_udev_path,
1581 };
1582
1583 static ssize_t target_core_store_dev_enable(
1584 void *p,
1585 const char *page,
1586 size_t count)
1587 {
1588 struct se_device *dev = p;
1589 char *ptr;
1590 int ret;
1591
1592 ptr = strstr(page, "1");
1593 if (!ptr) {
1594 pr_err("For dev_enable ops, only valid value"
1595 " is \"1\"\n");
1596 return -EINVAL;
1597 }
1598
1599 ret = target_configure_device(dev);
1600 if (ret)
1601 return ret;
1602 return count;
1603 }
1604
1605 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1606 .attr = { .ca_owner = THIS_MODULE,
1607 .ca_name = "enable",
1608 .ca_mode = S_IWUSR },
1609 .show = NULL,
1610 .store = target_core_store_dev_enable,
1611 };
1612
1613 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1614 {
1615 struct se_device *dev = p;
1616 struct config_item *lu_ci;
1617 struct t10_alua_lu_gp *lu_gp;
1618 struct t10_alua_lu_gp_member *lu_gp_mem;
1619 ssize_t len = 0;
1620
1621 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1622 if (!lu_gp_mem)
1623 return 0;
1624
1625 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1626 lu_gp = lu_gp_mem->lu_gp;
1627 if (lu_gp) {
1628 lu_ci = &lu_gp->lu_gp_group.cg_item;
1629 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1630 config_item_name(lu_ci), lu_gp->lu_gp_id);
1631 }
1632 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1633
1634 return len;
1635 }
1636
1637 static ssize_t target_core_store_alua_lu_gp(
1638 void *p,
1639 const char *page,
1640 size_t count)
1641 {
1642 struct se_device *dev = p;
1643 struct se_hba *hba = dev->se_hba;
1644 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1645 struct t10_alua_lu_gp_member *lu_gp_mem;
1646 unsigned char buf[LU_GROUP_NAME_BUF];
1647 int move = 0;
1648
1649 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1650 if (!lu_gp_mem)
1651 return 0;
1652
1653 if (count > LU_GROUP_NAME_BUF) {
1654 pr_err("ALUA LU Group Alias too large!\n");
1655 return -EINVAL;
1656 }
1657 memset(buf, 0, LU_GROUP_NAME_BUF);
1658 memcpy(buf, page, count);
1659 /*
1660 * Any ALUA logical unit alias besides "NULL" means we will be
1661 * making a new group association.
1662 */
1663 if (strcmp(strstrip(buf), "NULL")) {
1664 /*
1665 * core_alua_get_lu_gp_by_name() will increment reference to
1666 * struct t10_alua_lu_gp. This reference is released with
1667 * core_alua_get_lu_gp_by_name below().
1668 */
1669 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1670 if (!lu_gp_new)
1671 return -ENODEV;
1672 }
1673
1674 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1675 lu_gp = lu_gp_mem->lu_gp;
1676 if (lu_gp) {
1677 /*
1678 * Clearing an existing lu_gp association, and replacing
1679 * with NULL
1680 */
1681 if (!lu_gp_new) {
1682 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1683 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1684 " %hu\n",
1685 config_item_name(&hba->hba_group.cg_item),
1686 config_item_name(&dev->dev_group.cg_item),
1687 config_item_name(&lu_gp->lu_gp_group.cg_item),
1688 lu_gp->lu_gp_id);
1689
1690 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1691 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1692
1693 return count;
1694 }
1695 /*
1696 * Removing existing association of lu_gp_mem with lu_gp
1697 */
1698 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1699 move = 1;
1700 }
1701 /*
1702 * Associate lu_gp_mem with lu_gp_new.
1703 */
1704 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1705 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1706
1707 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1708 " core/alua/lu_gps/%s, ID: %hu\n",
1709 (move) ? "Moving" : "Adding",
1710 config_item_name(&hba->hba_group.cg_item),
1711 config_item_name(&dev->dev_group.cg_item),
1712 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1713 lu_gp_new->lu_gp_id);
1714
1715 core_alua_put_lu_gp_from_name(lu_gp_new);
1716 return count;
1717 }
1718
1719 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1720 .attr = { .ca_owner = THIS_MODULE,
1721 .ca_name = "alua_lu_gp",
1722 .ca_mode = S_IRUGO | S_IWUSR },
1723 .show = target_core_show_alua_lu_gp,
1724 .store = target_core_store_alua_lu_gp,
1725 };
1726
1727 static struct configfs_attribute *lio_core_dev_attrs[] = {
1728 &target_core_attr_dev_info.attr,
1729 &target_core_attr_dev_control.attr,
1730 &target_core_attr_dev_alias.attr,
1731 &target_core_attr_dev_udev_path.attr,
1732 &target_core_attr_dev_enable.attr,
1733 &target_core_attr_dev_alua_lu_gp.attr,
1734 NULL,
1735 };
1736
1737 static void target_core_dev_release(struct config_item *item)
1738 {
1739 struct config_group *dev_cg = to_config_group(item);
1740 struct se_device *dev =
1741 container_of(dev_cg, struct se_device, dev_group);
1742
1743 kfree(dev_cg->default_groups);
1744 target_free_device(dev);
1745 }
1746
1747 static ssize_t target_core_dev_show(struct config_item *item,
1748 struct configfs_attribute *attr,
1749 char *page)
1750 {
1751 struct config_group *dev_cg = to_config_group(item);
1752 struct se_device *dev =
1753 container_of(dev_cg, struct se_device, dev_group);
1754 struct target_core_configfs_attribute *tc_attr = container_of(
1755 attr, struct target_core_configfs_attribute, attr);
1756
1757 if (!tc_attr->show)
1758 return -EINVAL;
1759
1760 return tc_attr->show(dev, page);
1761 }
1762
1763 static ssize_t target_core_dev_store(struct config_item *item,
1764 struct configfs_attribute *attr,
1765 const char *page, size_t count)
1766 {
1767 struct config_group *dev_cg = to_config_group(item);
1768 struct se_device *dev =
1769 container_of(dev_cg, struct se_device, dev_group);
1770 struct target_core_configfs_attribute *tc_attr = container_of(
1771 attr, struct target_core_configfs_attribute, attr);
1772
1773 if (!tc_attr->store)
1774 return -EINVAL;
1775
1776 return tc_attr->store(dev, page, count);
1777 }
1778
1779 static struct configfs_item_operations target_core_dev_item_ops = {
1780 .release = target_core_dev_release,
1781 .show_attribute = target_core_dev_show,
1782 .store_attribute = target_core_dev_store,
1783 };
1784
1785 static struct config_item_type target_core_dev_cit = {
1786 .ct_item_ops = &target_core_dev_item_ops,
1787 .ct_attrs = lio_core_dev_attrs,
1788 .ct_owner = THIS_MODULE,
1789 };
1790
1791 /* End functions for struct config_item_type target_core_dev_cit */
1792
1793 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1794
1795 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1796 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1797 static struct target_core_alua_lu_gp_attribute \
1798 target_core_alua_lu_gp_##_name = \
1799 __CONFIGFS_EATTR(_name, _mode, \
1800 target_core_alua_lu_gp_show_attr_##_name, \
1801 target_core_alua_lu_gp_store_attr_##_name);
1802
1803 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1804 static struct target_core_alua_lu_gp_attribute \
1805 target_core_alua_lu_gp_##_name = \
1806 __CONFIGFS_EATTR_RO(_name, \
1807 target_core_alua_lu_gp_show_attr_##_name);
1808
1809 /*
1810 * lu_gp_id
1811 */
1812 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1813 struct t10_alua_lu_gp *lu_gp,
1814 char *page)
1815 {
1816 if (!lu_gp->lu_gp_valid_id)
1817 return 0;
1818
1819 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1820 }
1821
1822 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1823 struct t10_alua_lu_gp *lu_gp,
1824 const char *page,
1825 size_t count)
1826 {
1827 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1828 unsigned long lu_gp_id;
1829 int ret;
1830
1831 ret = strict_strtoul(page, 0, &lu_gp_id);
1832 if (ret < 0) {
1833 pr_err("strict_strtoul() returned %d for"
1834 " lu_gp_id\n", ret);
1835 return -EINVAL;
1836 }
1837 if (lu_gp_id > 0x0000ffff) {
1838 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1839 " 0x0000ffff\n", lu_gp_id);
1840 return -EINVAL;
1841 }
1842
1843 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1844 if (ret < 0)
1845 return -EINVAL;
1846
1847 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1848 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1849 config_item_name(&alua_lu_gp_cg->cg_item),
1850 lu_gp->lu_gp_id);
1851
1852 return count;
1853 }
1854
1855 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1856
1857 /*
1858 * members
1859 */
1860 static ssize_t target_core_alua_lu_gp_show_attr_members(
1861 struct t10_alua_lu_gp *lu_gp,
1862 char *page)
1863 {
1864 struct se_device *dev;
1865 struct se_hba *hba;
1866 struct t10_alua_lu_gp_member *lu_gp_mem;
1867 ssize_t len = 0, cur_len;
1868 unsigned char buf[LU_GROUP_NAME_BUF];
1869
1870 memset(buf, 0, LU_GROUP_NAME_BUF);
1871
1872 spin_lock(&lu_gp->lu_gp_lock);
1873 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1874 dev = lu_gp_mem->lu_gp_mem_dev;
1875 hba = dev->se_hba;
1876
1877 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1878 config_item_name(&hba->hba_group.cg_item),
1879 config_item_name(&dev->dev_group.cg_item));
1880 cur_len++; /* Extra byte for NULL terminator */
1881
1882 if ((cur_len + len) > PAGE_SIZE) {
1883 pr_warn("Ran out of lu_gp_show_attr"
1884 "_members buffer\n");
1885 break;
1886 }
1887 memcpy(page+len, buf, cur_len);
1888 len += cur_len;
1889 }
1890 spin_unlock(&lu_gp->lu_gp_lock);
1891
1892 return len;
1893 }
1894
1895 SE_DEV_ALUA_LU_ATTR_RO(members);
1896
1897 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1898
1899 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1900 &target_core_alua_lu_gp_lu_gp_id.attr,
1901 &target_core_alua_lu_gp_members.attr,
1902 NULL,
1903 };
1904
1905 static void target_core_alua_lu_gp_release(struct config_item *item)
1906 {
1907 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1908 struct t10_alua_lu_gp, lu_gp_group);
1909
1910 core_alua_free_lu_gp(lu_gp);
1911 }
1912
1913 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1914 .release = target_core_alua_lu_gp_release,
1915 .show_attribute = target_core_alua_lu_gp_attr_show,
1916 .store_attribute = target_core_alua_lu_gp_attr_store,
1917 };
1918
1919 static struct config_item_type target_core_alua_lu_gp_cit = {
1920 .ct_item_ops = &target_core_alua_lu_gp_ops,
1921 .ct_attrs = target_core_alua_lu_gp_attrs,
1922 .ct_owner = THIS_MODULE,
1923 };
1924
1925 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1926
1927 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1928
1929 static struct config_group *target_core_alua_create_lu_gp(
1930 struct config_group *group,
1931 const char *name)
1932 {
1933 struct t10_alua_lu_gp *lu_gp;
1934 struct config_group *alua_lu_gp_cg = NULL;
1935 struct config_item *alua_lu_gp_ci = NULL;
1936
1937 lu_gp = core_alua_allocate_lu_gp(name, 0);
1938 if (IS_ERR(lu_gp))
1939 return NULL;
1940
1941 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1942 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1943
1944 config_group_init_type_name(alua_lu_gp_cg, name,
1945 &target_core_alua_lu_gp_cit);
1946
1947 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1948 " Group: core/alua/lu_gps/%s\n",
1949 config_item_name(alua_lu_gp_ci));
1950
1951 return alua_lu_gp_cg;
1952
1953 }
1954
1955 static void target_core_alua_drop_lu_gp(
1956 struct config_group *group,
1957 struct config_item *item)
1958 {
1959 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1960 struct t10_alua_lu_gp, lu_gp_group);
1961
1962 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1963 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1964 config_item_name(item), lu_gp->lu_gp_id);
1965 /*
1966 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1967 * -> target_core_alua_lu_gp_release()
1968 */
1969 config_item_put(item);
1970 }
1971
1972 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1973 .make_group = &target_core_alua_create_lu_gp,
1974 .drop_item = &target_core_alua_drop_lu_gp,
1975 };
1976
1977 static struct config_item_type target_core_alua_lu_gps_cit = {
1978 .ct_item_ops = NULL,
1979 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1980 .ct_owner = THIS_MODULE,
1981 };
1982
1983 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1984
1985 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1986
1987 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1988 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
1989 static struct target_core_alua_tg_pt_gp_attribute \
1990 target_core_alua_tg_pt_gp_##_name = \
1991 __CONFIGFS_EATTR(_name, _mode, \
1992 target_core_alua_tg_pt_gp_show_attr_##_name, \
1993 target_core_alua_tg_pt_gp_store_attr_##_name);
1994
1995 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
1996 static struct target_core_alua_tg_pt_gp_attribute \
1997 target_core_alua_tg_pt_gp_##_name = \
1998 __CONFIGFS_EATTR_RO(_name, \
1999 target_core_alua_tg_pt_gp_show_attr_##_name);
2000
2001 /*
2002 * alua_access_state
2003 */
2004 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2005 struct t10_alua_tg_pt_gp *tg_pt_gp,
2006 char *page)
2007 {
2008 return sprintf(page, "%d\n",
2009 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2010 }
2011
2012 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2013 struct t10_alua_tg_pt_gp *tg_pt_gp,
2014 const char *page,
2015 size_t count)
2016 {
2017 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2018 unsigned long tmp;
2019 int new_state, ret;
2020
2021 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2022 pr_err("Unable to do implict ALUA on non valid"
2023 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2024 return -EINVAL;
2025 }
2026
2027 ret = strict_strtoul(page, 0, &tmp);
2028 if (ret < 0) {
2029 pr_err("Unable to extract new ALUA access state from"
2030 " %s\n", page);
2031 return -EINVAL;
2032 }
2033 new_state = (int)tmp;
2034
2035 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2036 pr_err("Unable to process implict configfs ALUA"
2037 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2038 return -EINVAL;
2039 }
2040
2041 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2042 NULL, NULL, new_state, 0);
2043 return (!ret) ? count : -EINVAL;
2044 }
2045
2046 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2047
2048 /*
2049 * alua_access_status
2050 */
2051 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2052 struct t10_alua_tg_pt_gp *tg_pt_gp,
2053 char *page)
2054 {
2055 return sprintf(page, "%s\n",
2056 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2057 }
2058
2059 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2060 struct t10_alua_tg_pt_gp *tg_pt_gp,
2061 const char *page,
2062 size_t count)
2063 {
2064 unsigned long tmp;
2065 int new_status, ret;
2066
2067 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2068 pr_err("Unable to do set ALUA access status on non"
2069 " valid tg_pt_gp ID: %hu\n",
2070 tg_pt_gp->tg_pt_gp_valid_id);
2071 return -EINVAL;
2072 }
2073
2074 ret = strict_strtoul(page, 0, &tmp);
2075 if (ret < 0) {
2076 pr_err("Unable to extract new ALUA access status"
2077 " from %s\n", page);
2078 return -EINVAL;
2079 }
2080 new_status = (int)tmp;
2081
2082 if ((new_status != ALUA_STATUS_NONE) &&
2083 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2084 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2085 pr_err("Illegal ALUA access status: 0x%02x\n",
2086 new_status);
2087 return -EINVAL;
2088 }
2089
2090 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2091 return count;
2092 }
2093
2094 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2095
2096 /*
2097 * alua_access_type
2098 */
2099 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2100 struct t10_alua_tg_pt_gp *tg_pt_gp,
2101 char *page)
2102 {
2103 return core_alua_show_access_type(tg_pt_gp, page);
2104 }
2105
2106 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2107 struct t10_alua_tg_pt_gp *tg_pt_gp,
2108 const char *page,
2109 size_t count)
2110 {
2111 return core_alua_store_access_type(tg_pt_gp, page, count);
2112 }
2113
2114 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2115
2116 /*
2117 * alua_write_metadata
2118 */
2119 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2120 struct t10_alua_tg_pt_gp *tg_pt_gp,
2121 char *page)
2122 {
2123 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2124 }
2125
2126 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2127 struct t10_alua_tg_pt_gp *tg_pt_gp,
2128 const char *page,
2129 size_t count)
2130 {
2131 unsigned long tmp;
2132 int ret;
2133
2134 ret = strict_strtoul(page, 0, &tmp);
2135 if (ret < 0) {
2136 pr_err("Unable to extract alua_write_metadata\n");
2137 return -EINVAL;
2138 }
2139
2140 if ((tmp != 0) && (tmp != 1)) {
2141 pr_err("Illegal value for alua_write_metadata:"
2142 " %lu\n", tmp);
2143 return -EINVAL;
2144 }
2145 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2146
2147 return count;
2148 }
2149
2150 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2151
2152
2153
2154 /*
2155 * nonop_delay_msecs
2156 */
2157 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2158 struct t10_alua_tg_pt_gp *tg_pt_gp,
2159 char *page)
2160 {
2161 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2162
2163 }
2164
2165 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2166 struct t10_alua_tg_pt_gp *tg_pt_gp,
2167 const char *page,
2168 size_t count)
2169 {
2170 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2171 }
2172
2173 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2174
2175 /*
2176 * trans_delay_msecs
2177 */
2178 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2179 struct t10_alua_tg_pt_gp *tg_pt_gp,
2180 char *page)
2181 {
2182 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2183 }
2184
2185 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2186 struct t10_alua_tg_pt_gp *tg_pt_gp,
2187 const char *page,
2188 size_t count)
2189 {
2190 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2191 }
2192
2193 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2194
2195 /*
2196 * implict_trans_secs
2197 */
2198 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2199 struct t10_alua_tg_pt_gp *tg_pt_gp,
2200 char *page)
2201 {
2202 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2203 }
2204
2205 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2206 struct t10_alua_tg_pt_gp *tg_pt_gp,
2207 const char *page,
2208 size_t count)
2209 {
2210 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2211 }
2212
2213 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2214
2215 /*
2216 * preferred
2217 */
2218
2219 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2220 struct t10_alua_tg_pt_gp *tg_pt_gp,
2221 char *page)
2222 {
2223 return core_alua_show_preferred_bit(tg_pt_gp, page);
2224 }
2225
2226 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2227 struct t10_alua_tg_pt_gp *tg_pt_gp,
2228 const char *page,
2229 size_t count)
2230 {
2231 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2232 }
2233
2234 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2235
2236 /*
2237 * tg_pt_gp_id
2238 */
2239 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2240 struct t10_alua_tg_pt_gp *tg_pt_gp,
2241 char *page)
2242 {
2243 if (!tg_pt_gp->tg_pt_gp_valid_id)
2244 return 0;
2245
2246 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2247 }
2248
2249 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2250 struct t10_alua_tg_pt_gp *tg_pt_gp,
2251 const char *page,
2252 size_t count)
2253 {
2254 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2255 unsigned long tg_pt_gp_id;
2256 int ret;
2257
2258 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2259 if (ret < 0) {
2260 pr_err("strict_strtoul() returned %d for"
2261 " tg_pt_gp_id\n", ret);
2262 return -EINVAL;
2263 }
2264 if (tg_pt_gp_id > 0x0000ffff) {
2265 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2266 " 0x0000ffff\n", tg_pt_gp_id);
2267 return -EINVAL;
2268 }
2269
2270 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2271 if (ret < 0)
2272 return -EINVAL;
2273
2274 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2275 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2276 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2277 tg_pt_gp->tg_pt_gp_id);
2278
2279 return count;
2280 }
2281
2282 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2283
2284 /*
2285 * members
2286 */
2287 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2288 struct t10_alua_tg_pt_gp *tg_pt_gp,
2289 char *page)
2290 {
2291 struct se_port *port;
2292 struct se_portal_group *tpg;
2293 struct se_lun *lun;
2294 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2295 ssize_t len = 0, cur_len;
2296 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2297
2298 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2299
2300 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2301 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2302 tg_pt_gp_mem_list) {
2303 port = tg_pt_gp_mem->tg_pt;
2304 tpg = port->sep_tpg;
2305 lun = port->sep_lun;
2306
2307 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2308 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2309 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2310 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2311 config_item_name(&lun->lun_group.cg_item));
2312 cur_len++; /* Extra byte for NULL terminator */
2313
2314 if ((cur_len + len) > PAGE_SIZE) {
2315 pr_warn("Ran out of lu_gp_show_attr"
2316 "_members buffer\n");
2317 break;
2318 }
2319 memcpy(page+len, buf, cur_len);
2320 len += cur_len;
2321 }
2322 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2323
2324 return len;
2325 }
2326
2327 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2328
2329 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2330 tg_pt_gp_group);
2331
2332 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2333 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2334 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2335 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2336 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2337 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2338 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2339 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2340 &target_core_alua_tg_pt_gp_preferred.attr,
2341 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2342 &target_core_alua_tg_pt_gp_members.attr,
2343 NULL,
2344 };
2345
2346 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2347 {
2348 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2349 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2350
2351 core_alua_free_tg_pt_gp(tg_pt_gp);
2352 }
2353
2354 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2355 .release = target_core_alua_tg_pt_gp_release,
2356 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2357 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2358 };
2359
2360 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2361 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2362 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2363 .ct_owner = THIS_MODULE,
2364 };
2365
2366 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2367
2368 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2369
2370 static struct config_group *target_core_alua_create_tg_pt_gp(
2371 struct config_group *group,
2372 const char *name)
2373 {
2374 struct t10_alua *alua = container_of(group, struct t10_alua,
2375 alua_tg_pt_gps_group);
2376 struct t10_alua_tg_pt_gp *tg_pt_gp;
2377 struct config_group *alua_tg_pt_gp_cg = NULL;
2378 struct config_item *alua_tg_pt_gp_ci = NULL;
2379
2380 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2381 if (!tg_pt_gp)
2382 return NULL;
2383
2384 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2385 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2386
2387 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2388 &target_core_alua_tg_pt_gp_cit);
2389
2390 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2391 " Group: alua/tg_pt_gps/%s\n",
2392 config_item_name(alua_tg_pt_gp_ci));
2393
2394 return alua_tg_pt_gp_cg;
2395 }
2396
2397 static void target_core_alua_drop_tg_pt_gp(
2398 struct config_group *group,
2399 struct config_item *item)
2400 {
2401 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2402 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2403
2404 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2405 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2406 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2407 /*
2408 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2409 * -> target_core_alua_tg_pt_gp_release().
2410 */
2411 config_item_put(item);
2412 }
2413
2414 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2415 .make_group = &target_core_alua_create_tg_pt_gp,
2416 .drop_item = &target_core_alua_drop_tg_pt_gp,
2417 };
2418
2419 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2420 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2421 .ct_owner = THIS_MODULE,
2422 };
2423
2424 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2425
2426 /* Start functions for struct config_item_type target_core_alua_cit */
2427
2428 /*
2429 * target_core_alua_cit is a ConfigFS group that lives under
2430 * /sys/kernel/config/target/core/alua. There are default groups
2431 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2432 * target_core_alua_cit in target_core_init_configfs() below.
2433 */
2434 static struct config_item_type target_core_alua_cit = {
2435 .ct_item_ops = NULL,
2436 .ct_attrs = NULL,
2437 .ct_owner = THIS_MODULE,
2438 };
2439
2440 /* End functions for struct config_item_type target_core_alua_cit */
2441
2442 /* Start functions for struct config_item_type target_core_stat_cit */
2443
2444 static struct config_group *target_core_stat_mkdir(
2445 struct config_group *group,
2446 const char *name)
2447 {
2448 return ERR_PTR(-ENOSYS);
2449 }
2450
2451 static void target_core_stat_rmdir(
2452 struct config_group *group,
2453 struct config_item *item)
2454 {
2455 return;
2456 }
2457
2458 static struct configfs_group_operations target_core_stat_group_ops = {
2459 .make_group = &target_core_stat_mkdir,
2460 .drop_item = &target_core_stat_rmdir,
2461 };
2462
2463 static struct config_item_type target_core_stat_cit = {
2464 .ct_group_ops = &target_core_stat_group_ops,
2465 .ct_owner = THIS_MODULE,
2466 };
2467
2468 /* End functions for struct config_item_type target_core_stat_cit */
2469
2470 /* Start functions for struct config_item_type target_core_hba_cit */
2471
2472 static struct config_group *target_core_make_subdev(
2473 struct config_group *group,
2474 const char *name)
2475 {
2476 struct t10_alua_tg_pt_gp *tg_pt_gp;
2477 struct se_subsystem_api *t;
2478 struct config_item *hba_ci = &group->cg_item;
2479 struct se_hba *hba = item_to_hba(hba_ci);
2480 struct se_device *dev;
2481 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2482 struct config_group *dev_stat_grp = NULL;
2483 int errno = -ENOMEM, ret;
2484
2485 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2486 if (ret)
2487 return ERR_PTR(ret);
2488 /*
2489 * Locate the struct se_subsystem_api from parent's struct se_hba.
2490 */
2491 t = hba->transport;
2492
2493 dev = target_alloc_device(hba, name);
2494 if (!dev)
2495 goto out_unlock;
2496
2497 dev_cg = &dev->dev_group;
2498
2499 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2500 GFP_KERNEL);
2501 if (!dev_cg->default_groups)
2502 goto out_free_device;
2503
2504 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2505 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2506 &target_core_dev_attrib_cit);
2507 config_group_init_type_name(&dev->dev_pr_group, "pr",
2508 &target_core_dev_pr_cit);
2509 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2510 &target_core_dev_wwn_cit);
2511 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2512 "alua", &target_core_alua_tg_pt_gps_cit);
2513 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2514 "statistics", &target_core_stat_cit);
2515
2516 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2517 dev_cg->default_groups[1] = &dev->dev_pr_group;
2518 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2519 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2520 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2521 dev_cg->default_groups[5] = NULL;
2522 /*
2523 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2524 */
2525 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2526 if (!tg_pt_gp)
2527 goto out_free_dev_cg_default_groups;
2528 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2529
2530 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2531 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2532 GFP_KERNEL);
2533 if (!tg_pt_gp_cg->default_groups) {
2534 pr_err("Unable to allocate tg_pt_gp_cg->"
2535 "default_groups\n");
2536 goto out_free_tg_pt_gp;
2537 }
2538
2539 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2540 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2541 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2542 tg_pt_gp_cg->default_groups[1] = NULL;
2543 /*
2544 * Add core/$HBA/$DEV/statistics/ default groups
2545 */
2546 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2547 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2548 GFP_KERNEL);
2549 if (!dev_stat_grp->default_groups) {
2550 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2551 goto out_free_tg_pt_gp_cg_default_groups;
2552 }
2553 target_stat_setup_dev_default_groups(dev);
2554
2555 mutex_unlock(&hba->hba_access_mutex);
2556 return dev_cg;
2557
2558 out_free_tg_pt_gp_cg_default_groups:
2559 kfree(tg_pt_gp_cg->default_groups);
2560 out_free_tg_pt_gp:
2561 core_alua_free_tg_pt_gp(tg_pt_gp);
2562 out_free_dev_cg_default_groups:
2563 kfree(dev_cg->default_groups);
2564 out_free_device:
2565 target_free_device(dev);
2566 out_unlock:
2567 mutex_unlock(&hba->hba_access_mutex);
2568 return ERR_PTR(errno);
2569 }
2570
2571 static void target_core_drop_subdev(
2572 struct config_group *group,
2573 struct config_item *item)
2574 {
2575 struct config_group *dev_cg = to_config_group(item);
2576 struct se_device *dev =
2577 container_of(dev_cg, struct se_device, dev_group);
2578 struct se_hba *hba;
2579 struct config_item *df_item;
2580 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2581 int i;
2582
2583 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2584
2585 mutex_lock(&hba->hba_access_mutex);
2586
2587 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2588 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2589 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2590 dev_stat_grp->default_groups[i] = NULL;
2591 config_item_put(df_item);
2592 }
2593 kfree(dev_stat_grp->default_groups);
2594
2595 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2596 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2597 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2598 tg_pt_gp_cg->default_groups[i] = NULL;
2599 config_item_put(df_item);
2600 }
2601 kfree(tg_pt_gp_cg->default_groups);
2602 /*
2603 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2604 * directly from target_core_alua_tg_pt_gp_release().
2605 */
2606 dev->t10_alua.default_tg_pt_gp = NULL;
2607
2608 for (i = 0; dev_cg->default_groups[i]; i++) {
2609 df_item = &dev_cg->default_groups[i]->cg_item;
2610 dev_cg->default_groups[i] = NULL;
2611 config_item_put(df_item);
2612 }
2613 /*
2614 * se_dev is released from target_core_dev_item_ops->release()
2615 */
2616 config_item_put(item);
2617 mutex_unlock(&hba->hba_access_mutex);
2618 }
2619
2620 static struct configfs_group_operations target_core_hba_group_ops = {
2621 .make_group = target_core_make_subdev,
2622 .drop_item = target_core_drop_subdev,
2623 };
2624
2625 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2626 #define SE_HBA_ATTR(_name, _mode) \
2627 static struct target_core_hba_attribute \
2628 target_core_hba_##_name = \
2629 __CONFIGFS_EATTR(_name, _mode, \
2630 target_core_hba_show_attr_##_name, \
2631 target_core_hba_store_attr_##_name);
2632
2633 #define SE_HBA_ATTR_RO(_name) \
2634 static struct target_core_hba_attribute \
2635 target_core_hba_##_name = \
2636 __CONFIGFS_EATTR_RO(_name, \
2637 target_core_hba_show_attr_##_name);
2638
2639 static ssize_t target_core_hba_show_attr_hba_info(
2640 struct se_hba *hba,
2641 char *page)
2642 {
2643 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2644 hba->hba_id, hba->transport->name,
2645 TARGET_CORE_CONFIGFS_VERSION);
2646 }
2647
2648 SE_HBA_ATTR_RO(hba_info);
2649
2650 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2651 char *page)
2652 {
2653 int hba_mode = 0;
2654
2655 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2656 hba_mode = 1;
2657
2658 return sprintf(page, "%d\n", hba_mode);
2659 }
2660
2661 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2662 const char *page, size_t count)
2663 {
2664 struct se_subsystem_api *transport = hba->transport;
2665 unsigned long mode_flag;
2666 int ret;
2667
2668 if (transport->pmode_enable_hba == NULL)
2669 return -EINVAL;
2670
2671 ret = strict_strtoul(page, 0, &mode_flag);
2672 if (ret < 0) {
2673 pr_err("Unable to extract hba mode flag: %d\n", ret);
2674 return -EINVAL;
2675 }
2676
2677 if (hba->dev_count) {
2678 pr_err("Unable to set hba_mode with active devices\n");
2679 return -EINVAL;
2680 }
2681
2682 ret = transport->pmode_enable_hba(hba, mode_flag);
2683 if (ret < 0)
2684 return -EINVAL;
2685 if (ret > 0)
2686 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2687 else if (ret == 0)
2688 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2689
2690 return count;
2691 }
2692
2693 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2694
2695 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2696
2697 static void target_core_hba_release(struct config_item *item)
2698 {
2699 struct se_hba *hba = container_of(to_config_group(item),
2700 struct se_hba, hba_group);
2701 core_delete_hba(hba);
2702 }
2703
2704 static struct configfs_attribute *target_core_hba_attrs[] = {
2705 &target_core_hba_hba_info.attr,
2706 &target_core_hba_hba_mode.attr,
2707 NULL,
2708 };
2709
2710 static struct configfs_item_operations target_core_hba_item_ops = {
2711 .release = target_core_hba_release,
2712 .show_attribute = target_core_hba_attr_show,
2713 .store_attribute = target_core_hba_attr_store,
2714 };
2715
2716 static struct config_item_type target_core_hba_cit = {
2717 .ct_item_ops = &target_core_hba_item_ops,
2718 .ct_group_ops = &target_core_hba_group_ops,
2719 .ct_attrs = target_core_hba_attrs,
2720 .ct_owner = THIS_MODULE,
2721 };
2722
2723 static struct config_group *target_core_call_addhbatotarget(
2724 struct config_group *group,
2725 const char *name)
2726 {
2727 char *se_plugin_str, *str, *str2;
2728 struct se_hba *hba;
2729 char buf[TARGET_CORE_NAME_MAX_LEN];
2730 unsigned long plugin_dep_id = 0;
2731 int ret;
2732
2733 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2734 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2735 pr_err("Passed *name strlen(): %d exceeds"
2736 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2737 TARGET_CORE_NAME_MAX_LEN);
2738 return ERR_PTR(-ENAMETOOLONG);
2739 }
2740 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2741
2742 str = strstr(buf, "_");
2743 if (!str) {
2744 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2745 return ERR_PTR(-EINVAL);
2746 }
2747 se_plugin_str = buf;
2748 /*
2749 * Special case for subsystem plugins that have "_" in their names.
2750 * Namely rd_direct and rd_mcp..
2751 */
2752 str2 = strstr(str+1, "_");
2753 if (str2) {
2754 *str2 = '\0'; /* Terminate for *se_plugin_str */
2755 str2++; /* Skip to start of plugin dependent ID */
2756 str = str2;
2757 } else {
2758 *str = '\0'; /* Terminate for *se_plugin_str */
2759 str++; /* Skip to start of plugin dependent ID */
2760 }
2761
2762 ret = strict_strtoul(str, 0, &plugin_dep_id);
2763 if (ret < 0) {
2764 pr_err("strict_strtoul() returned %d for"
2765 " plugin_dep_id\n", ret);
2766 return ERR_PTR(-EINVAL);
2767 }
2768 /*
2769 * Load up TCM subsystem plugins if they have not already been loaded.
2770 */
2771 transport_subsystem_check_init();
2772
2773 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2774 if (IS_ERR(hba))
2775 return ERR_CAST(hba);
2776
2777 config_group_init_type_name(&hba->hba_group, name,
2778 &target_core_hba_cit);
2779
2780 return &hba->hba_group;
2781 }
2782
2783 static void target_core_call_delhbafromtarget(
2784 struct config_group *group,
2785 struct config_item *item)
2786 {
2787 /*
2788 * core_delete_hba() is called from target_core_hba_item_ops->release()
2789 * -> target_core_hba_release()
2790 */
2791 config_item_put(item);
2792 }
2793
2794 static struct configfs_group_operations target_core_group_ops = {
2795 .make_group = target_core_call_addhbatotarget,
2796 .drop_item = target_core_call_delhbafromtarget,
2797 };
2798
2799 static struct config_item_type target_core_cit = {
2800 .ct_item_ops = NULL,
2801 .ct_group_ops = &target_core_group_ops,
2802 .ct_attrs = NULL,
2803 .ct_owner = THIS_MODULE,
2804 };
2805
2806 /* Stop functions for struct config_item_type target_core_hba_cit */
2807
2808 static int __init target_core_init_configfs(void)
2809 {
2810 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2811 struct config_group *lu_gp_cg = NULL;
2812 struct configfs_subsystem *subsys;
2813 struct t10_alua_lu_gp *lu_gp;
2814 int ret;
2815
2816 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2817 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2818 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2819
2820 subsys = target_core_subsystem[0];
2821 config_group_init(&subsys->su_group);
2822 mutex_init(&subsys->su_mutex);
2823
2824 ret = init_se_kmem_caches();
2825 if (ret < 0)
2826 return ret;
2827 /*
2828 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2829 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2830 */
2831 target_cg = &subsys->su_group;
2832 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2833 GFP_KERNEL);
2834 if (!target_cg->default_groups) {
2835 pr_err("Unable to allocate target_cg->default_groups\n");
2836 ret = -ENOMEM;
2837 goto out_global;
2838 }
2839
2840 config_group_init_type_name(&target_core_hbagroup,
2841 "core", &target_core_cit);
2842 target_cg->default_groups[0] = &target_core_hbagroup;
2843 target_cg->default_groups[1] = NULL;
2844 /*
2845 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2846 */
2847 hba_cg = &target_core_hbagroup;
2848 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2849 GFP_KERNEL);
2850 if (!hba_cg->default_groups) {
2851 pr_err("Unable to allocate hba_cg->default_groups\n");
2852 ret = -ENOMEM;
2853 goto out_global;
2854 }
2855 config_group_init_type_name(&alua_group,
2856 "alua", &target_core_alua_cit);
2857 hba_cg->default_groups[0] = &alua_group;
2858 hba_cg->default_groups[1] = NULL;
2859 /*
2860 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2861 * groups under /sys/kernel/config/target/core/alua/
2862 */
2863 alua_cg = &alua_group;
2864 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2865 GFP_KERNEL);
2866 if (!alua_cg->default_groups) {
2867 pr_err("Unable to allocate alua_cg->default_groups\n");
2868 ret = -ENOMEM;
2869 goto out_global;
2870 }
2871
2872 config_group_init_type_name(&alua_lu_gps_group,
2873 "lu_gps", &target_core_alua_lu_gps_cit);
2874 alua_cg->default_groups[0] = &alua_lu_gps_group;
2875 alua_cg->default_groups[1] = NULL;
2876 /*
2877 * Add core/alua/lu_gps/default_lu_gp
2878 */
2879 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2880 if (IS_ERR(lu_gp)) {
2881 ret = -ENOMEM;
2882 goto out_global;
2883 }
2884
2885 lu_gp_cg = &alua_lu_gps_group;
2886 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2887 GFP_KERNEL);
2888 if (!lu_gp_cg->default_groups) {
2889 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2890 ret = -ENOMEM;
2891 goto out_global;
2892 }
2893
2894 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2895 &target_core_alua_lu_gp_cit);
2896 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2897 lu_gp_cg->default_groups[1] = NULL;
2898 default_lu_gp = lu_gp;
2899 /*
2900 * Register the target_core_mod subsystem with configfs.
2901 */
2902 ret = configfs_register_subsystem(subsys);
2903 if (ret < 0) {
2904 pr_err("Error %d while registering subsystem %s\n",
2905 ret, subsys->su_group.cg_item.ci_namebuf);
2906 goto out_global;
2907 }
2908 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2909 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2910 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2911 /*
2912 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2913 */
2914 ret = rd_module_init();
2915 if (ret < 0)
2916 goto out;
2917
2918 ret = core_dev_setup_virtual_lun0();
2919 if (ret < 0)
2920 goto out;
2921
2922 return 0;
2923
2924 out:
2925 configfs_unregister_subsystem(subsys);
2926 core_dev_release_virtual_lun0();
2927 rd_module_exit();
2928 out_global:
2929 if (default_lu_gp) {
2930 core_alua_free_lu_gp(default_lu_gp);
2931 default_lu_gp = NULL;
2932 }
2933 if (lu_gp_cg)
2934 kfree(lu_gp_cg->default_groups);
2935 if (alua_cg)
2936 kfree(alua_cg->default_groups);
2937 if (hba_cg)
2938 kfree(hba_cg->default_groups);
2939 kfree(target_cg->default_groups);
2940 release_se_kmem_caches();
2941 return ret;
2942 }
2943
2944 static void __exit target_core_exit_configfs(void)
2945 {
2946 struct configfs_subsystem *subsys;
2947 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2948 struct config_item *item;
2949 int i;
2950
2951 subsys = target_core_subsystem[0];
2952
2953 lu_gp_cg = &alua_lu_gps_group;
2954 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2955 item = &lu_gp_cg->default_groups[i]->cg_item;
2956 lu_gp_cg->default_groups[i] = NULL;
2957 config_item_put(item);
2958 }
2959 kfree(lu_gp_cg->default_groups);
2960 lu_gp_cg->default_groups = NULL;
2961
2962 alua_cg = &alua_group;
2963 for (i = 0; alua_cg->default_groups[i]; i++) {
2964 item = &alua_cg->default_groups[i]->cg_item;
2965 alua_cg->default_groups[i] = NULL;
2966 config_item_put(item);
2967 }
2968 kfree(alua_cg->default_groups);
2969 alua_cg->default_groups = NULL;
2970
2971 hba_cg = &target_core_hbagroup;
2972 for (i = 0; hba_cg->default_groups[i]; i++) {
2973 item = &hba_cg->default_groups[i]->cg_item;
2974 hba_cg->default_groups[i] = NULL;
2975 config_item_put(item);
2976 }
2977 kfree(hba_cg->default_groups);
2978 hba_cg->default_groups = NULL;
2979 /*
2980 * We expect subsys->su_group.default_groups to be released
2981 * by configfs subsystem provider logic..
2982 */
2983 configfs_unregister_subsystem(subsys);
2984 kfree(subsys->su_group.default_groups);
2985
2986 core_alua_free_lu_gp(default_lu_gp);
2987 default_lu_gp = NULL;
2988
2989 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
2990 " Infrastructure\n");
2991
2992 core_dev_release_virtual_lun0();
2993 rd_module_exit();
2994 release_se_kmem_caches();
2995 }
2996
2997 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
2998 MODULE_AUTHOR("nab@Linux-iSCSI.org");
2999 MODULE_LICENSE("GPL");
3000
3001 module_init(target_core_init_configfs);
3002 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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