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Merge tag 'staging-3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[linux-2.6.git] / drivers / target / target_core_configfs.c
blobe4d22933efaf8ce38a3de9aee51df9d3027c4f6a
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
987 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
988
989 pr_reg = dev->dev_pr_res_holder;
990 if (!pr_reg)
991 return sprintf(page, "No SPC-3 Reservation holder\n");
992
993 se_nacl = pr_reg->pr_reg_nacl;
994 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
995
996 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
997 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
998 se_nacl->initiatorname, i_buf);
999 }
1000
1001 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1002 char *page)
1003 {
1004 struct se_node_acl *se_nacl;
1005 ssize_t len;
1006
1007 se_nacl = dev->dev_reserved_node_acl;
1008 if (se_nacl) {
1009 len = sprintf(page,
1010 "SPC-2 Reservation: %s Initiator: %s\n",
1011 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1012 se_nacl->initiatorname);
1013 } else {
1014 len = sprintf(page, "No SPC-2 Reservation holder\n");
1015 }
1016 return len;
1017 }
1018
1019 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1020 char *page)
1021 {
1022 int ret;
1023
1024 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1025 return sprintf(page, "Passthrough\n");
1026
1027 spin_lock(&dev->dev_reservation_lock);
1028 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1029 ret = target_core_dev_pr_show_spc2_res(dev, page);
1030 else
1031 ret = target_core_dev_pr_show_spc3_res(dev, page);
1032 spin_unlock(&dev->dev_reservation_lock);
1033 return ret;
1034 }
1035
1036 SE_DEV_PR_ATTR_RO(res_holder);
1037
1038 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1039 struct se_device *dev, char *page)
1040 {
1041 ssize_t len = 0;
1042
1043 spin_lock(&dev->dev_reservation_lock);
1044 if (!dev->dev_pr_res_holder) {
1045 len = sprintf(page, "No SPC-3 Reservation holder\n");
1046 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1047 len = sprintf(page, "SPC-3 Reservation: All Target"
1048 " Ports registration\n");
1049 } else {
1050 len = sprintf(page, "SPC-3 Reservation: Single"
1051 " Target Port registration\n");
1052 }
1053
1054 spin_unlock(&dev->dev_reservation_lock);
1055 return len;
1056 }
1057
1058 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1059
1060 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1061 struct se_device *dev, char *page)
1062 {
1063 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1064 }
1065
1066 SE_DEV_PR_ATTR_RO(res_pr_generation);
1067
1068 /*
1069 * res_pr_holder_tg_port
1070 */
1071 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1072 struct se_device *dev, char *page)
1073 {
1074 struct se_node_acl *se_nacl;
1075 struct se_lun *lun;
1076 struct se_portal_group *se_tpg;
1077 struct t10_pr_registration *pr_reg;
1078 struct target_core_fabric_ops *tfo;
1079 ssize_t len = 0;
1080
1081 spin_lock(&dev->dev_reservation_lock);
1082 pr_reg = dev->dev_pr_res_holder;
1083 if (!pr_reg) {
1084 len = sprintf(page, "No SPC-3 Reservation holder\n");
1085 goto out_unlock;
1086 }
1087
1088 se_nacl = pr_reg->pr_reg_nacl;
1089 se_tpg = se_nacl->se_tpg;
1090 lun = pr_reg->pr_reg_tg_pt_lun;
1091 tfo = se_tpg->se_tpg_tfo;
1092
1093 len += sprintf(page+len, "SPC-3 Reservation: %s"
1094 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1095 tfo->tpg_get_wwn(se_tpg));
1096 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1097 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1098 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1099 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1100 tfo->get_fabric_name(), lun->unpacked_lun);
1101
1102 out_unlock:
1103 spin_unlock(&dev->dev_reservation_lock);
1104 return len;
1105 }
1106
1107 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1108
1109 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1110 struct se_device *dev, char *page)
1111 {
1112 struct target_core_fabric_ops *tfo;
1113 struct t10_pr_registration *pr_reg;
1114 unsigned char buf[384];
1115 char i_buf[PR_REG_ISID_ID_LEN];
1116 ssize_t len = 0;
1117 int reg_count = 0;
1118
1119 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1120
1121 spin_lock(&dev->t10_pr.registration_lock);
1122 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1123 pr_reg_list) {
1124
1125 memset(buf, 0, 384);
1126 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1127 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1128 core_pr_dump_initiator_port(pr_reg, i_buf,
1129 PR_REG_ISID_ID_LEN);
1130 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1131 tfo->get_fabric_name(),
1132 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1133 pr_reg->pr_res_generation);
1134
1135 if (len + strlen(buf) >= PAGE_SIZE)
1136 break;
1137
1138 len += sprintf(page+len, "%s", buf);
1139 reg_count++;
1140 }
1141 spin_unlock(&dev->t10_pr.registration_lock);
1142
1143 if (!reg_count)
1144 len += sprintf(page+len, "None\n");
1145
1146 return len;
1147 }
1148
1149 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1150
1151 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1152 struct se_device *dev, char *page)
1153 {
1154 struct t10_pr_registration *pr_reg;
1155 ssize_t len = 0;
1156
1157 spin_lock(&dev->dev_reservation_lock);
1158 pr_reg = dev->dev_pr_res_holder;
1159 if (pr_reg) {
1160 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1161 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1162 } else {
1163 len = sprintf(page, "No SPC-3 Reservation holder\n");
1164 }
1165
1166 spin_unlock(&dev->dev_reservation_lock);
1167 return len;
1168 }
1169
1170 SE_DEV_PR_ATTR_RO(res_pr_type);
1171
1172 static ssize_t target_core_dev_pr_show_attr_res_type(
1173 struct se_device *dev, char *page)
1174 {
1175 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1176 return sprintf(page, "SPC_PASSTHROUGH\n");
1177 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1178 return sprintf(page, "SPC2_RESERVATIONS\n");
1179 else
1180 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1181 }
1182
1183 SE_DEV_PR_ATTR_RO(res_type);
1184
1185 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1186 struct se_device *dev, char *page)
1187 {
1188 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1189 return 0;
1190
1191 return sprintf(page, "APTPL Bit Status: %s\n",
1192 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1193 }
1194
1195 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1196
1197 /*
1198 * res_aptpl_metadata
1199 */
1200 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1201 struct se_device *dev, char *page)
1202 {
1203 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1204 return 0;
1205
1206 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1207 }
1208
1209 enum {
1210 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1211 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1212 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1213 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1214 };
1215
1216 static match_table_t tokens = {
1217 {Opt_initiator_fabric, "initiator_fabric=%s"},
1218 {Opt_initiator_node, "initiator_node=%s"},
1219 {Opt_initiator_sid, "initiator_sid=%s"},
1220 {Opt_sa_res_key, "sa_res_key=%s"},
1221 {Opt_res_holder, "res_holder=%d"},
1222 {Opt_res_type, "res_type=%d"},
1223 {Opt_res_scope, "res_scope=%d"},
1224 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1225 {Opt_mapped_lun, "mapped_lun=%d"},
1226 {Opt_target_fabric, "target_fabric=%s"},
1227 {Opt_target_node, "target_node=%s"},
1228 {Opt_tpgt, "tpgt=%d"},
1229 {Opt_port_rtpi, "port_rtpi=%d"},
1230 {Opt_target_lun, "target_lun=%d"},
1231 {Opt_err, NULL}
1232 };
1233
1234 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1235 struct se_device *dev,
1236 const char *page,
1237 size_t count)
1238 {
1239 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1240 unsigned char *t_fabric = NULL, *t_port = NULL;
1241 char *orig, *ptr, *arg_p, *opts;
1242 substring_t args[MAX_OPT_ARGS];
1243 unsigned long long tmp_ll;
1244 u64 sa_res_key = 0;
1245 u32 mapped_lun = 0, target_lun = 0;
1246 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1247 u16 port_rpti = 0, tpgt = 0;
1248 u8 type = 0, scope;
1249
1250 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1251 return 0;
1252 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1253 return 0;
1254
1255 if (dev->export_count) {
1256 pr_debug("Unable to process APTPL metadata while"
1257 " active fabric exports exist\n");
1258 return -EINVAL;
1259 }
1260
1261 opts = kstrdup(page, GFP_KERNEL);
1262 if (!opts)
1263 return -ENOMEM;
1264
1265 orig = opts;
1266 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1267 if (!*ptr)
1268 continue;
1269
1270 token = match_token(ptr, tokens, args);
1271 switch (token) {
1272 case Opt_initiator_fabric:
1273 i_fabric = match_strdup(&args[0]);
1274 if (!i_fabric) {
1275 ret = -ENOMEM;
1276 goto out;
1277 }
1278 break;
1279 case Opt_initiator_node:
1280 i_port = match_strdup(&args[0]);
1281 if (!i_port) {
1282 ret = -ENOMEM;
1283 goto out;
1284 }
1285 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1286 pr_err("APTPL metadata initiator_node="
1287 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1288 PR_APTPL_MAX_IPORT_LEN);
1289 ret = -EINVAL;
1290 break;
1291 }
1292 break;
1293 case Opt_initiator_sid:
1294 isid = match_strdup(&args[0]);
1295 if (!isid) {
1296 ret = -ENOMEM;
1297 goto out;
1298 }
1299 if (strlen(isid) >= PR_REG_ISID_LEN) {
1300 pr_err("APTPL metadata initiator_isid"
1301 "= exceeds PR_REG_ISID_LEN: %d\n",
1302 PR_REG_ISID_LEN);
1303 ret = -EINVAL;
1304 break;
1305 }
1306 break;
1307 case Opt_sa_res_key:
1308 arg_p = match_strdup(&args[0]);
1309 if (!arg_p) {
1310 ret = -ENOMEM;
1311 goto out;
1312 }
1313 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1314 if (ret < 0) {
1315 pr_err("strict_strtoull() failed for"
1316 " sa_res_key=\n");
1317 goto out;
1318 }
1319 sa_res_key = (u64)tmp_ll;
1320 break;
1321 /*
1322 * PR APTPL Metadata for Reservation
1323 */
1324 case Opt_res_holder:
1325 match_int(args, &arg);
1326 res_holder = arg;
1327 break;
1328 case Opt_res_type:
1329 match_int(args, &arg);
1330 type = (u8)arg;
1331 break;
1332 case Opt_res_scope:
1333 match_int(args, &arg);
1334 scope = (u8)arg;
1335 break;
1336 case Opt_res_all_tg_pt:
1337 match_int(args, &arg);
1338 all_tg_pt = (int)arg;
1339 break;
1340 case Opt_mapped_lun:
1341 match_int(args, &arg);
1342 mapped_lun = (u32)arg;
1343 break;
1344 /*
1345 * PR APTPL Metadata for Target Port
1346 */
1347 case Opt_target_fabric:
1348 t_fabric = match_strdup(&args[0]);
1349 if (!t_fabric) {
1350 ret = -ENOMEM;
1351 goto out;
1352 }
1353 break;
1354 case Opt_target_node:
1355 t_port = match_strdup(&args[0]);
1356 if (!t_port) {
1357 ret = -ENOMEM;
1358 goto out;
1359 }
1360 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1361 pr_err("APTPL metadata target_node="
1362 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1363 PR_APTPL_MAX_TPORT_LEN);
1364 ret = -EINVAL;
1365 break;
1366 }
1367 break;
1368 case Opt_tpgt:
1369 match_int(args, &arg);
1370 tpgt = (u16)arg;
1371 break;
1372 case Opt_port_rtpi:
1373 match_int(args, &arg);
1374 port_rpti = (u16)arg;
1375 break;
1376 case Opt_target_lun:
1377 match_int(args, &arg);
1378 target_lun = (u32)arg;
1379 break;
1380 default:
1381 break;
1382 }
1383 }
1384
1385 if (!i_port || !t_port || !sa_res_key) {
1386 pr_err("Illegal parameters for APTPL registration\n");
1387 ret = -EINVAL;
1388 goto out;
1389 }
1390
1391 if (res_holder && !(type)) {
1392 pr_err("Illegal PR type: 0x%02x for reservation"
1393 " holder\n", type);
1394 ret = -EINVAL;
1395 goto out;
1396 }
1397
1398 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1399 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1400 res_holder, all_tg_pt, type);
1401 out:
1402 kfree(i_fabric);
1403 kfree(i_port);
1404 kfree(isid);
1405 kfree(t_fabric);
1406 kfree(t_port);
1407 kfree(orig);
1408 return (ret == 0) ? count : ret;
1409 }
1410
1411 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1412
1413 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1414
1415 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1416 &target_core_dev_pr_res_holder.attr,
1417 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1418 &target_core_dev_pr_res_pr_generation.attr,
1419 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1420 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1421 &target_core_dev_pr_res_pr_type.attr,
1422 &target_core_dev_pr_res_type.attr,
1423 &target_core_dev_pr_res_aptpl_active.attr,
1424 &target_core_dev_pr_res_aptpl_metadata.attr,
1425 NULL,
1426 };
1427
1428 static struct configfs_item_operations target_core_dev_pr_ops = {
1429 .show_attribute = target_core_dev_pr_attr_show,
1430 .store_attribute = target_core_dev_pr_attr_store,
1431 };
1432
1433 static struct config_item_type target_core_dev_pr_cit = {
1434 .ct_item_ops = &target_core_dev_pr_ops,
1435 .ct_attrs = target_core_dev_pr_attrs,
1436 .ct_owner = THIS_MODULE,
1437 };
1438
1439 /* End functions for struct config_item_type target_core_dev_pr_cit */
1440
1441 /* Start functions for struct config_item_type target_core_dev_cit */
1442
1443 static ssize_t target_core_show_dev_info(void *p, char *page)
1444 {
1445 struct se_device *dev = p;
1446 struct se_subsystem_api *t = dev->transport;
1447 int bl = 0;
1448 ssize_t read_bytes = 0;
1449
1450 transport_dump_dev_state(dev, page, &bl);
1451 read_bytes += bl;
1452 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1453 return read_bytes;
1454 }
1455
1456 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1457 .attr = { .ca_owner = THIS_MODULE,
1458 .ca_name = "info",
1459 .ca_mode = S_IRUGO },
1460 .show = target_core_show_dev_info,
1461 .store = NULL,
1462 };
1463
1464 static ssize_t target_core_store_dev_control(
1465 void *p,
1466 const char *page,
1467 size_t count)
1468 {
1469 struct se_device *dev = p;
1470 struct se_subsystem_api *t = dev->transport;
1471
1472 return t->set_configfs_dev_params(dev, page, count);
1473 }
1474
1475 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1476 .attr = { .ca_owner = THIS_MODULE,
1477 .ca_name = "control",
1478 .ca_mode = S_IWUSR },
1479 .show = NULL,
1480 .store = target_core_store_dev_control,
1481 };
1482
1483 static ssize_t target_core_show_dev_alias(void *p, char *page)
1484 {
1485 struct se_device *dev = p;
1486
1487 if (!(dev->dev_flags & DF_USING_ALIAS))
1488 return 0;
1489
1490 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1491 }
1492
1493 static ssize_t target_core_store_dev_alias(
1494 void *p,
1495 const char *page,
1496 size_t count)
1497 {
1498 struct se_device *dev = p;
1499 struct se_hba *hba = dev->se_hba;
1500 ssize_t read_bytes;
1501
1502 if (count > (SE_DEV_ALIAS_LEN-1)) {
1503 pr_err("alias count: %d exceeds"
1504 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1505 SE_DEV_ALIAS_LEN-1);
1506 return -EINVAL;
1507 }
1508
1509 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1510 if (!read_bytes)
1511 return -EINVAL;
1512 if (dev->dev_alias[read_bytes - 1] == '\n')
1513 dev->dev_alias[read_bytes - 1] = '\0';
1514
1515 dev->dev_flags |= DF_USING_ALIAS;
1516
1517 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1518 config_item_name(&hba->hba_group.cg_item),
1519 config_item_name(&dev->dev_group.cg_item),
1520 dev->dev_alias);
1521
1522 return read_bytes;
1523 }
1524
1525 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1526 .attr = { .ca_owner = THIS_MODULE,
1527 .ca_name = "alias",
1528 .ca_mode = S_IRUGO | S_IWUSR },
1529 .show = target_core_show_dev_alias,
1530 .store = target_core_store_dev_alias,
1531 };
1532
1533 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1534 {
1535 struct se_device *dev = p;
1536
1537 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1538 return 0;
1539
1540 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1541 }
1542
1543 static ssize_t target_core_store_dev_udev_path(
1544 void *p,
1545 const char *page,
1546 size_t count)
1547 {
1548 struct se_device *dev = p;
1549 struct se_hba *hba = dev->se_hba;
1550 ssize_t read_bytes;
1551
1552 if (count > (SE_UDEV_PATH_LEN-1)) {
1553 pr_err("udev_path count: %d exceeds"
1554 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1555 SE_UDEV_PATH_LEN-1);
1556 return -EINVAL;
1557 }
1558
1559 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1560 "%s", page);
1561 if (!read_bytes)
1562 return -EINVAL;
1563 if (dev->udev_path[read_bytes - 1] == '\n')
1564 dev->udev_path[read_bytes - 1] = '\0';
1565
1566 dev->dev_flags |= DF_USING_UDEV_PATH;
1567
1568 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1569 config_item_name(&hba->hba_group.cg_item),
1570 config_item_name(&dev->dev_group.cg_item),
1571 dev->udev_path);
1572
1573 return read_bytes;
1574 }
1575
1576 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1577 .attr = { .ca_owner = THIS_MODULE,
1578 .ca_name = "udev_path",
1579 .ca_mode = S_IRUGO | S_IWUSR },
1580 .show = target_core_show_dev_udev_path,
1581 .store = target_core_store_dev_udev_path,
1582 };
1583
1584 static ssize_t target_core_show_dev_enable(void *p, char *page)
1585 {
1586 struct se_device *dev = p;
1587
1588 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1589 }
1590
1591 static ssize_t target_core_store_dev_enable(
1592 void *p,
1593 const char *page,
1594 size_t count)
1595 {
1596 struct se_device *dev = p;
1597 char *ptr;
1598 int ret;
1599
1600 ptr = strstr(page, "1");
1601 if (!ptr) {
1602 pr_err("For dev_enable ops, only valid value"
1603 " is \"1\"\n");
1604 return -EINVAL;
1605 }
1606
1607 ret = target_configure_device(dev);
1608 if (ret)
1609 return ret;
1610 return count;
1611 }
1612
1613 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1614 .attr = { .ca_owner = THIS_MODULE,
1615 .ca_name = "enable",
1616 .ca_mode = S_IRUGO | S_IWUSR },
1617 .show = target_core_show_dev_enable,
1618 .store = target_core_store_dev_enable,
1619 };
1620
1621 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1622 {
1623 struct se_device *dev = p;
1624 struct config_item *lu_ci;
1625 struct t10_alua_lu_gp *lu_gp;
1626 struct t10_alua_lu_gp_member *lu_gp_mem;
1627 ssize_t len = 0;
1628
1629 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1630 if (!lu_gp_mem)
1631 return 0;
1632
1633 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1634 lu_gp = lu_gp_mem->lu_gp;
1635 if (lu_gp) {
1636 lu_ci = &lu_gp->lu_gp_group.cg_item;
1637 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1638 config_item_name(lu_ci), lu_gp->lu_gp_id);
1639 }
1640 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1641
1642 return len;
1643 }
1644
1645 static ssize_t target_core_store_alua_lu_gp(
1646 void *p,
1647 const char *page,
1648 size_t count)
1649 {
1650 struct se_device *dev = p;
1651 struct se_hba *hba = dev->se_hba;
1652 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1653 struct t10_alua_lu_gp_member *lu_gp_mem;
1654 unsigned char buf[LU_GROUP_NAME_BUF];
1655 int move = 0;
1656
1657 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1658 if (!lu_gp_mem)
1659 return 0;
1660
1661 if (count > LU_GROUP_NAME_BUF) {
1662 pr_err("ALUA LU Group Alias too large!\n");
1663 return -EINVAL;
1664 }
1665 memset(buf, 0, LU_GROUP_NAME_BUF);
1666 memcpy(buf, page, count);
1667 /*
1668 * Any ALUA logical unit alias besides "NULL" means we will be
1669 * making a new group association.
1670 */
1671 if (strcmp(strstrip(buf), "NULL")) {
1672 /*
1673 * core_alua_get_lu_gp_by_name() will increment reference to
1674 * struct t10_alua_lu_gp. This reference is released with
1675 * core_alua_get_lu_gp_by_name below().
1676 */
1677 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1678 if (!lu_gp_new)
1679 return -ENODEV;
1680 }
1681
1682 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1683 lu_gp = lu_gp_mem->lu_gp;
1684 if (lu_gp) {
1685 /*
1686 * Clearing an existing lu_gp association, and replacing
1687 * with NULL
1688 */
1689 if (!lu_gp_new) {
1690 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1691 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1692 " %hu\n",
1693 config_item_name(&hba->hba_group.cg_item),
1694 config_item_name(&dev->dev_group.cg_item),
1695 config_item_name(&lu_gp->lu_gp_group.cg_item),
1696 lu_gp->lu_gp_id);
1697
1698 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1699 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1700
1701 return count;
1702 }
1703 /*
1704 * Removing existing association of lu_gp_mem with lu_gp
1705 */
1706 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1707 move = 1;
1708 }
1709 /*
1710 * Associate lu_gp_mem with lu_gp_new.
1711 */
1712 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1713 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1714
1715 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1716 " core/alua/lu_gps/%s, ID: %hu\n",
1717 (move) ? "Moving" : "Adding",
1718 config_item_name(&hba->hba_group.cg_item),
1719 config_item_name(&dev->dev_group.cg_item),
1720 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1721 lu_gp_new->lu_gp_id);
1722
1723 core_alua_put_lu_gp_from_name(lu_gp_new);
1724 return count;
1725 }
1726
1727 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1728 .attr = { .ca_owner = THIS_MODULE,
1729 .ca_name = "alua_lu_gp",
1730 .ca_mode = S_IRUGO | S_IWUSR },
1731 .show = target_core_show_alua_lu_gp,
1732 .store = target_core_store_alua_lu_gp,
1733 };
1734
1735 static struct configfs_attribute *lio_core_dev_attrs[] = {
1736 &target_core_attr_dev_info.attr,
1737 &target_core_attr_dev_control.attr,
1738 &target_core_attr_dev_alias.attr,
1739 &target_core_attr_dev_udev_path.attr,
1740 &target_core_attr_dev_enable.attr,
1741 &target_core_attr_dev_alua_lu_gp.attr,
1742 NULL,
1743 };
1744
1745 static void target_core_dev_release(struct config_item *item)
1746 {
1747 struct config_group *dev_cg = to_config_group(item);
1748 struct se_device *dev =
1749 container_of(dev_cg, struct se_device, dev_group);
1750
1751 kfree(dev_cg->default_groups);
1752 target_free_device(dev);
1753 }
1754
1755 static ssize_t target_core_dev_show(struct config_item *item,
1756 struct configfs_attribute *attr,
1757 char *page)
1758 {
1759 struct config_group *dev_cg = to_config_group(item);
1760 struct se_device *dev =
1761 container_of(dev_cg, struct se_device, dev_group);
1762 struct target_core_configfs_attribute *tc_attr = container_of(
1763 attr, struct target_core_configfs_attribute, attr);
1764
1765 if (!tc_attr->show)
1766 return -EINVAL;
1767
1768 return tc_attr->show(dev, page);
1769 }
1770
1771 static ssize_t target_core_dev_store(struct config_item *item,
1772 struct configfs_attribute *attr,
1773 const char *page, size_t count)
1774 {
1775 struct config_group *dev_cg = to_config_group(item);
1776 struct se_device *dev =
1777 container_of(dev_cg, struct se_device, dev_group);
1778 struct target_core_configfs_attribute *tc_attr = container_of(
1779 attr, struct target_core_configfs_attribute, attr);
1780
1781 if (!tc_attr->store)
1782 return -EINVAL;
1783
1784 return tc_attr->store(dev, page, count);
1785 }
1786
1787 static struct configfs_item_operations target_core_dev_item_ops = {
1788 .release = target_core_dev_release,
1789 .show_attribute = target_core_dev_show,
1790 .store_attribute = target_core_dev_store,
1791 };
1792
1793 static struct config_item_type target_core_dev_cit = {
1794 .ct_item_ops = &target_core_dev_item_ops,
1795 .ct_attrs = lio_core_dev_attrs,
1796 .ct_owner = THIS_MODULE,
1797 };
1798
1799 /* End functions for struct config_item_type target_core_dev_cit */
1800
1801 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1802
1803 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1804 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1805 static struct target_core_alua_lu_gp_attribute \
1806 target_core_alua_lu_gp_##_name = \
1807 __CONFIGFS_EATTR(_name, _mode, \
1808 target_core_alua_lu_gp_show_attr_##_name, \
1809 target_core_alua_lu_gp_store_attr_##_name);
1810
1811 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1812 static struct target_core_alua_lu_gp_attribute \
1813 target_core_alua_lu_gp_##_name = \
1814 __CONFIGFS_EATTR_RO(_name, \
1815 target_core_alua_lu_gp_show_attr_##_name);
1816
1817 /*
1818 * lu_gp_id
1819 */
1820 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1821 struct t10_alua_lu_gp *lu_gp,
1822 char *page)
1823 {
1824 if (!lu_gp->lu_gp_valid_id)
1825 return 0;
1826
1827 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1828 }
1829
1830 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1831 struct t10_alua_lu_gp *lu_gp,
1832 const char *page,
1833 size_t count)
1834 {
1835 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1836 unsigned long lu_gp_id;
1837 int ret;
1838
1839 ret = strict_strtoul(page, 0, &lu_gp_id);
1840 if (ret < 0) {
1841 pr_err("strict_strtoul() returned %d for"
1842 " lu_gp_id\n", ret);
1843 return -EINVAL;
1844 }
1845 if (lu_gp_id > 0x0000ffff) {
1846 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1847 " 0x0000ffff\n", lu_gp_id);
1848 return -EINVAL;
1849 }
1850
1851 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1852 if (ret < 0)
1853 return -EINVAL;
1854
1855 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1856 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1857 config_item_name(&alua_lu_gp_cg->cg_item),
1858 lu_gp->lu_gp_id);
1859
1860 return count;
1861 }
1862
1863 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1864
1865 /*
1866 * members
1867 */
1868 static ssize_t target_core_alua_lu_gp_show_attr_members(
1869 struct t10_alua_lu_gp *lu_gp,
1870 char *page)
1871 {
1872 struct se_device *dev;
1873 struct se_hba *hba;
1874 struct t10_alua_lu_gp_member *lu_gp_mem;
1875 ssize_t len = 0, cur_len;
1876 unsigned char buf[LU_GROUP_NAME_BUF];
1877
1878 memset(buf, 0, LU_GROUP_NAME_BUF);
1879
1880 spin_lock(&lu_gp->lu_gp_lock);
1881 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1882 dev = lu_gp_mem->lu_gp_mem_dev;
1883 hba = dev->se_hba;
1884
1885 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1886 config_item_name(&hba->hba_group.cg_item),
1887 config_item_name(&dev->dev_group.cg_item));
1888 cur_len++; /* Extra byte for NULL terminator */
1889
1890 if ((cur_len + len) > PAGE_SIZE) {
1891 pr_warn("Ran out of lu_gp_show_attr"
1892 "_members buffer\n");
1893 break;
1894 }
1895 memcpy(page+len, buf, cur_len);
1896 len += cur_len;
1897 }
1898 spin_unlock(&lu_gp->lu_gp_lock);
1899
1900 return len;
1901 }
1902
1903 SE_DEV_ALUA_LU_ATTR_RO(members);
1904
1905 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1906
1907 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1908 &target_core_alua_lu_gp_lu_gp_id.attr,
1909 &target_core_alua_lu_gp_members.attr,
1910 NULL,
1911 };
1912
1913 static void target_core_alua_lu_gp_release(struct config_item *item)
1914 {
1915 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1916 struct t10_alua_lu_gp, lu_gp_group);
1917
1918 core_alua_free_lu_gp(lu_gp);
1919 }
1920
1921 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1922 .release = target_core_alua_lu_gp_release,
1923 .show_attribute = target_core_alua_lu_gp_attr_show,
1924 .store_attribute = target_core_alua_lu_gp_attr_store,
1925 };
1926
1927 static struct config_item_type target_core_alua_lu_gp_cit = {
1928 .ct_item_ops = &target_core_alua_lu_gp_ops,
1929 .ct_attrs = target_core_alua_lu_gp_attrs,
1930 .ct_owner = THIS_MODULE,
1931 };
1932
1933 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1934
1935 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1936
1937 static struct config_group *target_core_alua_create_lu_gp(
1938 struct config_group *group,
1939 const char *name)
1940 {
1941 struct t10_alua_lu_gp *lu_gp;
1942 struct config_group *alua_lu_gp_cg = NULL;
1943 struct config_item *alua_lu_gp_ci = NULL;
1944
1945 lu_gp = core_alua_allocate_lu_gp(name, 0);
1946 if (IS_ERR(lu_gp))
1947 return NULL;
1948
1949 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1950 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1951
1952 config_group_init_type_name(alua_lu_gp_cg, name,
1953 &target_core_alua_lu_gp_cit);
1954
1955 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1956 " Group: core/alua/lu_gps/%s\n",
1957 config_item_name(alua_lu_gp_ci));
1958
1959 return alua_lu_gp_cg;
1960
1961 }
1962
1963 static void target_core_alua_drop_lu_gp(
1964 struct config_group *group,
1965 struct config_item *item)
1966 {
1967 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1968 struct t10_alua_lu_gp, lu_gp_group);
1969
1970 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1971 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1972 config_item_name(item), lu_gp->lu_gp_id);
1973 /*
1974 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1975 * -> target_core_alua_lu_gp_release()
1976 */
1977 config_item_put(item);
1978 }
1979
1980 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1981 .make_group = &target_core_alua_create_lu_gp,
1982 .drop_item = &target_core_alua_drop_lu_gp,
1983 };
1984
1985 static struct config_item_type target_core_alua_lu_gps_cit = {
1986 .ct_item_ops = NULL,
1987 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1988 .ct_owner = THIS_MODULE,
1989 };
1990
1991 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1992
1993 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1994
1995 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1996 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
1997 static struct target_core_alua_tg_pt_gp_attribute \
1998 target_core_alua_tg_pt_gp_##_name = \
1999 __CONFIGFS_EATTR(_name, _mode, \
2000 target_core_alua_tg_pt_gp_show_attr_##_name, \
2001 target_core_alua_tg_pt_gp_store_attr_##_name);
2002
2003 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2004 static struct target_core_alua_tg_pt_gp_attribute \
2005 target_core_alua_tg_pt_gp_##_name = \
2006 __CONFIGFS_EATTR_RO(_name, \
2007 target_core_alua_tg_pt_gp_show_attr_##_name);
2008
2009 /*
2010 * alua_access_state
2011 */
2012 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2013 struct t10_alua_tg_pt_gp *tg_pt_gp,
2014 char *page)
2015 {
2016 return sprintf(page, "%d\n",
2017 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2018 }
2019
2020 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2021 struct t10_alua_tg_pt_gp *tg_pt_gp,
2022 const char *page,
2023 size_t count)
2024 {
2025 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2026 unsigned long tmp;
2027 int new_state, ret;
2028
2029 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2030 pr_err("Unable to do implict ALUA on non valid"
2031 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2032 return -EINVAL;
2033 }
2034
2035 ret = strict_strtoul(page, 0, &tmp);
2036 if (ret < 0) {
2037 pr_err("Unable to extract new ALUA access state from"
2038 " %s\n", page);
2039 return -EINVAL;
2040 }
2041 new_state = (int)tmp;
2042
2043 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2044 pr_err("Unable to process implict configfs ALUA"
2045 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2046 return -EINVAL;
2047 }
2048
2049 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2050 NULL, NULL, new_state, 0);
2051 return (!ret) ? count : -EINVAL;
2052 }
2053
2054 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2055
2056 /*
2057 * alua_access_status
2058 */
2059 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2060 struct t10_alua_tg_pt_gp *tg_pt_gp,
2061 char *page)
2062 {
2063 return sprintf(page, "%s\n",
2064 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2065 }
2066
2067 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2068 struct t10_alua_tg_pt_gp *tg_pt_gp,
2069 const char *page,
2070 size_t count)
2071 {
2072 unsigned long tmp;
2073 int new_status, ret;
2074
2075 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2076 pr_err("Unable to do set ALUA access status on non"
2077 " valid tg_pt_gp ID: %hu\n",
2078 tg_pt_gp->tg_pt_gp_valid_id);
2079 return -EINVAL;
2080 }
2081
2082 ret = strict_strtoul(page, 0, &tmp);
2083 if (ret < 0) {
2084 pr_err("Unable to extract new ALUA access status"
2085 " from %s\n", page);
2086 return -EINVAL;
2087 }
2088 new_status = (int)tmp;
2089
2090 if ((new_status != ALUA_STATUS_NONE) &&
2091 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2092 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2093 pr_err("Illegal ALUA access status: 0x%02x\n",
2094 new_status);
2095 return -EINVAL;
2096 }
2097
2098 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2099 return count;
2100 }
2101
2102 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2103
2104 /*
2105 * alua_access_type
2106 */
2107 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2108 struct t10_alua_tg_pt_gp *tg_pt_gp,
2109 char *page)
2110 {
2111 return core_alua_show_access_type(tg_pt_gp, page);
2112 }
2113
2114 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2115 struct t10_alua_tg_pt_gp *tg_pt_gp,
2116 const char *page,
2117 size_t count)
2118 {
2119 return core_alua_store_access_type(tg_pt_gp, page, count);
2120 }
2121
2122 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2123
2124 /*
2125 * alua_write_metadata
2126 */
2127 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2128 struct t10_alua_tg_pt_gp *tg_pt_gp,
2129 char *page)
2130 {
2131 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2132 }
2133
2134 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2135 struct t10_alua_tg_pt_gp *tg_pt_gp,
2136 const char *page,
2137 size_t count)
2138 {
2139 unsigned long tmp;
2140 int ret;
2141
2142 ret = strict_strtoul(page, 0, &tmp);
2143 if (ret < 0) {
2144 pr_err("Unable to extract alua_write_metadata\n");
2145 return -EINVAL;
2146 }
2147
2148 if ((tmp != 0) && (tmp != 1)) {
2149 pr_err("Illegal value for alua_write_metadata:"
2150 " %lu\n", tmp);
2151 return -EINVAL;
2152 }
2153 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2154
2155 return count;
2156 }
2157
2158 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2159
2160
2161
2162 /*
2163 * nonop_delay_msecs
2164 */
2165 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2166 struct t10_alua_tg_pt_gp *tg_pt_gp,
2167 char *page)
2168 {
2169 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2170
2171 }
2172
2173 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2174 struct t10_alua_tg_pt_gp *tg_pt_gp,
2175 const char *page,
2176 size_t count)
2177 {
2178 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2179 }
2180
2181 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2182
2183 /*
2184 * trans_delay_msecs
2185 */
2186 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2187 struct t10_alua_tg_pt_gp *tg_pt_gp,
2188 char *page)
2189 {
2190 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2191 }
2192
2193 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2194 struct t10_alua_tg_pt_gp *tg_pt_gp,
2195 const char *page,
2196 size_t count)
2197 {
2198 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2199 }
2200
2201 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2202
2203 /*
2204 * implict_trans_secs
2205 */
2206 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2207 struct t10_alua_tg_pt_gp *tg_pt_gp,
2208 char *page)
2209 {
2210 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2211 }
2212
2213 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2214 struct t10_alua_tg_pt_gp *tg_pt_gp,
2215 const char *page,
2216 size_t count)
2217 {
2218 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2219 }
2220
2221 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2222
2223 /*
2224 * preferred
2225 */
2226
2227 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2228 struct t10_alua_tg_pt_gp *tg_pt_gp,
2229 char *page)
2230 {
2231 return core_alua_show_preferred_bit(tg_pt_gp, page);
2232 }
2233
2234 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2235 struct t10_alua_tg_pt_gp *tg_pt_gp,
2236 const char *page,
2237 size_t count)
2238 {
2239 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2240 }
2241
2242 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2243
2244 /*
2245 * tg_pt_gp_id
2246 */
2247 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2248 struct t10_alua_tg_pt_gp *tg_pt_gp,
2249 char *page)
2250 {
2251 if (!tg_pt_gp->tg_pt_gp_valid_id)
2252 return 0;
2253
2254 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2255 }
2256
2257 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2258 struct t10_alua_tg_pt_gp *tg_pt_gp,
2259 const char *page,
2260 size_t count)
2261 {
2262 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2263 unsigned long tg_pt_gp_id;
2264 int ret;
2265
2266 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2267 if (ret < 0) {
2268 pr_err("strict_strtoul() returned %d for"
2269 " tg_pt_gp_id\n", ret);
2270 return -EINVAL;
2271 }
2272 if (tg_pt_gp_id > 0x0000ffff) {
2273 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2274 " 0x0000ffff\n", tg_pt_gp_id);
2275 return -EINVAL;
2276 }
2277
2278 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2279 if (ret < 0)
2280 return -EINVAL;
2281
2282 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2283 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2284 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2285 tg_pt_gp->tg_pt_gp_id);
2286
2287 return count;
2288 }
2289
2290 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2291
2292 /*
2293 * members
2294 */
2295 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2296 struct t10_alua_tg_pt_gp *tg_pt_gp,
2297 char *page)
2298 {
2299 struct se_port *port;
2300 struct se_portal_group *tpg;
2301 struct se_lun *lun;
2302 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2303 ssize_t len = 0, cur_len;
2304 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2305
2306 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2307
2308 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2309 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2310 tg_pt_gp_mem_list) {
2311 port = tg_pt_gp_mem->tg_pt;
2312 tpg = port->sep_tpg;
2313 lun = port->sep_lun;
2314
2315 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2316 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2317 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2318 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2319 config_item_name(&lun->lun_group.cg_item));
2320 cur_len++; /* Extra byte for NULL terminator */
2321
2322 if ((cur_len + len) > PAGE_SIZE) {
2323 pr_warn("Ran out of lu_gp_show_attr"
2324 "_members buffer\n");
2325 break;
2326 }
2327 memcpy(page+len, buf, cur_len);
2328 len += cur_len;
2329 }
2330 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2331
2332 return len;
2333 }
2334
2335 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2336
2337 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2338 tg_pt_gp_group);
2339
2340 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2341 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2342 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2343 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2344 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2345 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2346 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2347 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2348 &target_core_alua_tg_pt_gp_preferred.attr,
2349 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2350 &target_core_alua_tg_pt_gp_members.attr,
2351 NULL,
2352 };
2353
2354 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2355 {
2356 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2357 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2358
2359 core_alua_free_tg_pt_gp(tg_pt_gp);
2360 }
2361
2362 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2363 .release = target_core_alua_tg_pt_gp_release,
2364 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2365 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2366 };
2367
2368 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2369 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2370 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2371 .ct_owner = THIS_MODULE,
2372 };
2373
2374 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2375
2376 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2377
2378 static struct config_group *target_core_alua_create_tg_pt_gp(
2379 struct config_group *group,
2380 const char *name)
2381 {
2382 struct t10_alua *alua = container_of(group, struct t10_alua,
2383 alua_tg_pt_gps_group);
2384 struct t10_alua_tg_pt_gp *tg_pt_gp;
2385 struct config_group *alua_tg_pt_gp_cg = NULL;
2386 struct config_item *alua_tg_pt_gp_ci = NULL;
2387
2388 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2389 if (!tg_pt_gp)
2390 return NULL;
2391
2392 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2393 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2394
2395 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2396 &target_core_alua_tg_pt_gp_cit);
2397
2398 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2399 " Group: alua/tg_pt_gps/%s\n",
2400 config_item_name(alua_tg_pt_gp_ci));
2401
2402 return alua_tg_pt_gp_cg;
2403 }
2404
2405 static void target_core_alua_drop_tg_pt_gp(
2406 struct config_group *group,
2407 struct config_item *item)
2408 {
2409 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2410 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2411
2412 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2413 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2414 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2415 /*
2416 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2417 * -> target_core_alua_tg_pt_gp_release().
2418 */
2419 config_item_put(item);
2420 }
2421
2422 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2423 .make_group = &target_core_alua_create_tg_pt_gp,
2424 .drop_item = &target_core_alua_drop_tg_pt_gp,
2425 };
2426
2427 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2428 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2429 .ct_owner = THIS_MODULE,
2430 };
2431
2432 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2433
2434 /* Start functions for struct config_item_type target_core_alua_cit */
2435
2436 /*
2437 * target_core_alua_cit is a ConfigFS group that lives under
2438 * /sys/kernel/config/target/core/alua. There are default groups
2439 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2440 * target_core_alua_cit in target_core_init_configfs() below.
2441 */
2442 static struct config_item_type target_core_alua_cit = {
2443 .ct_item_ops = NULL,
2444 .ct_attrs = NULL,
2445 .ct_owner = THIS_MODULE,
2446 };
2447
2448 /* End functions for struct config_item_type target_core_alua_cit */
2449
2450 /* Start functions for struct config_item_type target_core_stat_cit */
2451
2452 static struct config_group *target_core_stat_mkdir(
2453 struct config_group *group,
2454 const char *name)
2455 {
2456 return ERR_PTR(-ENOSYS);
2457 }
2458
2459 static void target_core_stat_rmdir(
2460 struct config_group *group,
2461 struct config_item *item)
2462 {
2463 return;
2464 }
2465
2466 static struct configfs_group_operations target_core_stat_group_ops = {
2467 .make_group = &target_core_stat_mkdir,
2468 .drop_item = &target_core_stat_rmdir,
2469 };
2470
2471 static struct config_item_type target_core_stat_cit = {
2472 .ct_group_ops = &target_core_stat_group_ops,
2473 .ct_owner = THIS_MODULE,
2474 };
2475
2476 /* End functions for struct config_item_type target_core_stat_cit */
2477
2478 /* Start functions for struct config_item_type target_core_hba_cit */
2479
2480 static struct config_group *target_core_make_subdev(
2481 struct config_group *group,
2482 const char *name)
2483 {
2484 struct t10_alua_tg_pt_gp *tg_pt_gp;
2485 struct se_subsystem_api *t;
2486 struct config_item *hba_ci = &group->cg_item;
2487 struct se_hba *hba = item_to_hba(hba_ci);
2488 struct se_device *dev;
2489 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2490 struct config_group *dev_stat_grp = NULL;
2491 int errno = -ENOMEM, ret;
2492
2493 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2494 if (ret)
2495 return ERR_PTR(ret);
2496 /*
2497 * Locate the struct se_subsystem_api from parent's struct se_hba.
2498 */
2499 t = hba->transport;
2500
2501 dev = target_alloc_device(hba, name);
2502 if (!dev)
2503 goto out_unlock;
2504
2505 dev_cg = &dev->dev_group;
2506
2507 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2508 GFP_KERNEL);
2509 if (!dev_cg->default_groups)
2510 goto out_free_device;
2511
2512 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2513 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2514 &target_core_dev_attrib_cit);
2515 config_group_init_type_name(&dev->dev_pr_group, "pr",
2516 &target_core_dev_pr_cit);
2517 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2518 &target_core_dev_wwn_cit);
2519 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2520 "alua", &target_core_alua_tg_pt_gps_cit);
2521 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2522 "statistics", &target_core_stat_cit);
2523
2524 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2525 dev_cg->default_groups[1] = &dev->dev_pr_group;
2526 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2527 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2528 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2529 dev_cg->default_groups[5] = NULL;
2530 /*
2531 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2532 */
2533 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2534 if (!tg_pt_gp)
2535 goto out_free_dev_cg_default_groups;
2536 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2537
2538 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2539 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2540 GFP_KERNEL);
2541 if (!tg_pt_gp_cg->default_groups) {
2542 pr_err("Unable to allocate tg_pt_gp_cg->"
2543 "default_groups\n");
2544 goto out_free_tg_pt_gp;
2545 }
2546
2547 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2548 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2549 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2550 tg_pt_gp_cg->default_groups[1] = NULL;
2551 /*
2552 * Add core/$HBA/$DEV/statistics/ default groups
2553 */
2554 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2555 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2556 GFP_KERNEL);
2557 if (!dev_stat_grp->default_groups) {
2558 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2559 goto out_free_tg_pt_gp_cg_default_groups;
2560 }
2561 target_stat_setup_dev_default_groups(dev);
2562
2563 mutex_unlock(&hba->hba_access_mutex);
2564 return dev_cg;
2565
2566 out_free_tg_pt_gp_cg_default_groups:
2567 kfree(tg_pt_gp_cg->default_groups);
2568 out_free_tg_pt_gp:
2569 core_alua_free_tg_pt_gp(tg_pt_gp);
2570 out_free_dev_cg_default_groups:
2571 kfree(dev_cg->default_groups);
2572 out_free_device:
2573 target_free_device(dev);
2574 out_unlock:
2575 mutex_unlock(&hba->hba_access_mutex);
2576 return ERR_PTR(errno);
2577 }
2578
2579 static void target_core_drop_subdev(
2580 struct config_group *group,
2581 struct config_item *item)
2582 {
2583 struct config_group *dev_cg = to_config_group(item);
2584 struct se_device *dev =
2585 container_of(dev_cg, struct se_device, dev_group);
2586 struct se_hba *hba;
2587 struct config_item *df_item;
2588 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2589 int i;
2590
2591 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2592
2593 mutex_lock(&hba->hba_access_mutex);
2594
2595 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2596 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2597 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2598 dev_stat_grp->default_groups[i] = NULL;
2599 config_item_put(df_item);
2600 }
2601 kfree(dev_stat_grp->default_groups);
2602
2603 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2604 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2605 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2606 tg_pt_gp_cg->default_groups[i] = NULL;
2607 config_item_put(df_item);
2608 }
2609 kfree(tg_pt_gp_cg->default_groups);
2610 /*
2611 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2612 * directly from target_core_alua_tg_pt_gp_release().
2613 */
2614 dev->t10_alua.default_tg_pt_gp = NULL;
2615
2616 for (i = 0; dev_cg->default_groups[i]; i++) {
2617 df_item = &dev_cg->default_groups[i]->cg_item;
2618 dev_cg->default_groups[i] = NULL;
2619 config_item_put(df_item);
2620 }
2621 /*
2622 * se_dev is released from target_core_dev_item_ops->release()
2623 */
2624 config_item_put(item);
2625 mutex_unlock(&hba->hba_access_mutex);
2626 }
2627
2628 static struct configfs_group_operations target_core_hba_group_ops = {
2629 .make_group = target_core_make_subdev,
2630 .drop_item = target_core_drop_subdev,
2631 };
2632
2633 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2634 #define SE_HBA_ATTR(_name, _mode) \
2635 static struct target_core_hba_attribute \
2636 target_core_hba_##_name = \
2637 __CONFIGFS_EATTR(_name, _mode, \
2638 target_core_hba_show_attr_##_name, \
2639 target_core_hba_store_attr_##_name);
2640
2641 #define SE_HBA_ATTR_RO(_name) \
2642 static struct target_core_hba_attribute \
2643 target_core_hba_##_name = \
2644 __CONFIGFS_EATTR_RO(_name, \
2645 target_core_hba_show_attr_##_name);
2646
2647 static ssize_t target_core_hba_show_attr_hba_info(
2648 struct se_hba *hba,
2649 char *page)
2650 {
2651 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2652 hba->hba_id, hba->transport->name,
2653 TARGET_CORE_CONFIGFS_VERSION);
2654 }
2655
2656 SE_HBA_ATTR_RO(hba_info);
2657
2658 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2659 char *page)
2660 {
2661 int hba_mode = 0;
2662
2663 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2664 hba_mode = 1;
2665
2666 return sprintf(page, "%d\n", hba_mode);
2667 }
2668
2669 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2670 const char *page, size_t count)
2671 {
2672 struct se_subsystem_api *transport = hba->transport;
2673 unsigned long mode_flag;
2674 int ret;
2675
2676 if (transport->pmode_enable_hba == NULL)
2677 return -EINVAL;
2678
2679 ret = strict_strtoul(page, 0, &mode_flag);
2680 if (ret < 0) {
2681 pr_err("Unable to extract hba mode flag: %d\n", ret);
2682 return -EINVAL;
2683 }
2684
2685 if (hba->dev_count) {
2686 pr_err("Unable to set hba_mode with active devices\n");
2687 return -EINVAL;
2688 }
2689
2690 ret = transport->pmode_enable_hba(hba, mode_flag);
2691 if (ret < 0)
2692 return -EINVAL;
2693 if (ret > 0)
2694 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2695 else if (ret == 0)
2696 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2697
2698 return count;
2699 }
2700
2701 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2702
2703 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2704
2705 static void target_core_hba_release(struct config_item *item)
2706 {
2707 struct se_hba *hba = container_of(to_config_group(item),
2708 struct se_hba, hba_group);
2709 core_delete_hba(hba);
2710 }
2711
2712 static struct configfs_attribute *target_core_hba_attrs[] = {
2713 &target_core_hba_hba_info.attr,
2714 &target_core_hba_hba_mode.attr,
2715 NULL,
2716 };
2717
2718 static struct configfs_item_operations target_core_hba_item_ops = {
2719 .release = target_core_hba_release,
2720 .show_attribute = target_core_hba_attr_show,
2721 .store_attribute = target_core_hba_attr_store,
2722 };
2723
2724 static struct config_item_type target_core_hba_cit = {
2725 .ct_item_ops = &target_core_hba_item_ops,
2726 .ct_group_ops = &target_core_hba_group_ops,
2727 .ct_attrs = target_core_hba_attrs,
2728 .ct_owner = THIS_MODULE,
2729 };
2730
2731 static struct config_group *target_core_call_addhbatotarget(
2732 struct config_group *group,
2733 const char *name)
2734 {
2735 char *se_plugin_str, *str, *str2;
2736 struct se_hba *hba;
2737 char buf[TARGET_CORE_NAME_MAX_LEN];
2738 unsigned long plugin_dep_id = 0;
2739 int ret;
2740
2741 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2742 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2743 pr_err("Passed *name strlen(): %d exceeds"
2744 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2745 TARGET_CORE_NAME_MAX_LEN);
2746 return ERR_PTR(-ENAMETOOLONG);
2747 }
2748 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2749
2750 str = strstr(buf, "_");
2751 if (!str) {
2752 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2753 return ERR_PTR(-EINVAL);
2754 }
2755 se_plugin_str = buf;
2756 /*
2757 * Special case for subsystem plugins that have "_" in their names.
2758 * Namely rd_direct and rd_mcp..
2759 */
2760 str2 = strstr(str+1, "_");
2761 if (str2) {
2762 *str2 = '\0'; /* Terminate for *se_plugin_str */
2763 str2++; /* Skip to start of plugin dependent ID */
2764 str = str2;
2765 } else {
2766 *str = '\0'; /* Terminate for *se_plugin_str */
2767 str++; /* Skip to start of plugin dependent ID */
2768 }
2769
2770 ret = strict_strtoul(str, 0, &plugin_dep_id);
2771 if (ret < 0) {
2772 pr_err("strict_strtoul() returned %d for"
2773 " plugin_dep_id\n", ret);
2774 return ERR_PTR(-EINVAL);
2775 }
2776 /*
2777 * Load up TCM subsystem plugins if they have not already been loaded.
2778 */
2779 transport_subsystem_check_init();
2780
2781 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2782 if (IS_ERR(hba))
2783 return ERR_CAST(hba);
2784
2785 config_group_init_type_name(&hba->hba_group, name,
2786 &target_core_hba_cit);
2787
2788 return &hba->hba_group;
2789 }
2790
2791 static void target_core_call_delhbafromtarget(
2792 struct config_group *group,
2793 struct config_item *item)
2794 {
2795 /*
2796 * core_delete_hba() is called from target_core_hba_item_ops->release()
2797 * -> target_core_hba_release()
2798 */
2799 config_item_put(item);
2800 }
2801
2802 static struct configfs_group_operations target_core_group_ops = {
2803 .make_group = target_core_call_addhbatotarget,
2804 .drop_item = target_core_call_delhbafromtarget,
2805 };
2806
2807 static struct config_item_type target_core_cit = {
2808 .ct_item_ops = NULL,
2809 .ct_group_ops = &target_core_group_ops,
2810 .ct_attrs = NULL,
2811 .ct_owner = THIS_MODULE,
2812 };
2813
2814 /* Stop functions for struct config_item_type target_core_hba_cit */
2815
2816 static int __init target_core_init_configfs(void)
2817 {
2818 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2819 struct config_group *lu_gp_cg = NULL;
2820 struct configfs_subsystem *subsys;
2821 struct t10_alua_lu_gp *lu_gp;
2822 int ret;
2823
2824 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2825 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2826 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2827
2828 subsys = target_core_subsystem[0];
2829 config_group_init(&subsys->su_group);
2830 mutex_init(&subsys->su_mutex);
2831
2832 ret = init_se_kmem_caches();
2833 if (ret < 0)
2834 return ret;
2835 /*
2836 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2837 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2838 */
2839 target_cg = &subsys->su_group;
2840 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2841 GFP_KERNEL);
2842 if (!target_cg->default_groups) {
2843 pr_err("Unable to allocate target_cg->default_groups\n");
2844 ret = -ENOMEM;
2845 goto out_global;
2846 }
2847
2848 config_group_init_type_name(&target_core_hbagroup,
2849 "core", &target_core_cit);
2850 target_cg->default_groups[0] = &target_core_hbagroup;
2851 target_cg->default_groups[1] = NULL;
2852 /*
2853 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2854 */
2855 hba_cg = &target_core_hbagroup;
2856 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2857 GFP_KERNEL);
2858 if (!hba_cg->default_groups) {
2859 pr_err("Unable to allocate hba_cg->default_groups\n");
2860 ret = -ENOMEM;
2861 goto out_global;
2862 }
2863 config_group_init_type_name(&alua_group,
2864 "alua", &target_core_alua_cit);
2865 hba_cg->default_groups[0] = &alua_group;
2866 hba_cg->default_groups[1] = NULL;
2867 /*
2868 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2869 * groups under /sys/kernel/config/target/core/alua/
2870 */
2871 alua_cg = &alua_group;
2872 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2873 GFP_KERNEL);
2874 if (!alua_cg->default_groups) {
2875 pr_err("Unable to allocate alua_cg->default_groups\n");
2876 ret = -ENOMEM;
2877 goto out_global;
2878 }
2879
2880 config_group_init_type_name(&alua_lu_gps_group,
2881 "lu_gps", &target_core_alua_lu_gps_cit);
2882 alua_cg->default_groups[0] = &alua_lu_gps_group;
2883 alua_cg->default_groups[1] = NULL;
2884 /*
2885 * Add core/alua/lu_gps/default_lu_gp
2886 */
2887 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2888 if (IS_ERR(lu_gp)) {
2889 ret = -ENOMEM;
2890 goto out_global;
2891 }
2892
2893 lu_gp_cg = &alua_lu_gps_group;
2894 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2895 GFP_KERNEL);
2896 if (!lu_gp_cg->default_groups) {
2897 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2898 ret = -ENOMEM;
2899 goto out_global;
2900 }
2901
2902 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2903 &target_core_alua_lu_gp_cit);
2904 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2905 lu_gp_cg->default_groups[1] = NULL;
2906 default_lu_gp = lu_gp;
2907 /*
2908 * Register the target_core_mod subsystem with configfs.
2909 */
2910 ret = configfs_register_subsystem(subsys);
2911 if (ret < 0) {
2912 pr_err("Error %d while registering subsystem %s\n",
2913 ret, subsys->su_group.cg_item.ci_namebuf);
2914 goto out_global;
2915 }
2916 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2917 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2918 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2919 /*
2920 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2921 */
2922 ret = rd_module_init();
2923 if (ret < 0)
2924 goto out;
2925
2926 ret = core_dev_setup_virtual_lun0();
2927 if (ret < 0)
2928 goto out;
2929
2930 return 0;
2931
2932 out:
2933 configfs_unregister_subsystem(subsys);
2934 core_dev_release_virtual_lun0();
2935 rd_module_exit();
2936 out_global:
2937 if (default_lu_gp) {
2938 core_alua_free_lu_gp(default_lu_gp);
2939 default_lu_gp = NULL;
2940 }
2941 if (lu_gp_cg)
2942 kfree(lu_gp_cg->default_groups);
2943 if (alua_cg)
2944 kfree(alua_cg->default_groups);
2945 if (hba_cg)
2946 kfree(hba_cg->default_groups);
2947 kfree(target_cg->default_groups);
2948 release_se_kmem_caches();
2949 return ret;
2950 }
2951
2952 static void __exit target_core_exit_configfs(void)
2953 {
2954 struct configfs_subsystem *subsys;
2955 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2956 struct config_item *item;
2957 int i;
2958
2959 subsys = target_core_subsystem[0];
2960
2961 lu_gp_cg = &alua_lu_gps_group;
2962 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2963 item = &lu_gp_cg->default_groups[i]->cg_item;
2964 lu_gp_cg->default_groups[i] = NULL;
2965 config_item_put(item);
2966 }
2967 kfree(lu_gp_cg->default_groups);
2968 lu_gp_cg->default_groups = NULL;
2969
2970 alua_cg = &alua_group;
2971 for (i = 0; alua_cg->default_groups[i]; i++) {
2972 item = &alua_cg->default_groups[i]->cg_item;
2973 alua_cg->default_groups[i] = NULL;
2974 config_item_put(item);
2975 }
2976 kfree(alua_cg->default_groups);
2977 alua_cg->default_groups = NULL;
2978
2979 hba_cg = &target_core_hbagroup;
2980 for (i = 0; hba_cg->default_groups[i]; i++) {
2981 item = &hba_cg->default_groups[i]->cg_item;
2982 hba_cg->default_groups[i] = NULL;
2983 config_item_put(item);
2984 }
2985 kfree(hba_cg->default_groups);
2986 hba_cg->default_groups = NULL;
2987 /*
2988 * We expect subsys->su_group.default_groups to be released
2989 * by configfs subsystem provider logic..
2990 */
2991 configfs_unregister_subsystem(subsys);
2992 kfree(subsys->su_group.default_groups);
2993
2994 core_alua_free_lu_gp(default_lu_gp);
2995 default_lu_gp = NULL;
2996
2997 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
2998 " Infrastructure\n");
2999
3000 core_dev_release_virtual_lun0();
3001 rd_module_exit();
3002 release_se_kmem_caches();
3003 }
3004
3005 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3006 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3007 MODULE_LICENSE("GPL");
3008
3009 module_init(target_core_init_configfs);
3010 module_exit(target_core_exit_configfs);
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