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[deliverable/linux.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <generated/utsrelease.h>
27 #include <linux/utsname.h>
28 #include <linux/init.h>
29 #include <linux/fs.h>
30 #include <linux/namei.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/delay.h>
34 #include <linux/unistd.h>
35 #include <linux/string.h>
36 #include <linux/parser.h>
37 #include <linux/syscalls.h>
38 #include <linux/configfs.h>
39 #include <linux/spinlock.h>
40
41 #include <target/target_core_base.h>
42 #include <target/target_core_device.h>
43 #include <target/target_core_transport.h>
44 #include <target/target_core_fabric_ops.h>
45 #include <target/target_core_fabric_configfs.h>
46 #include <target/target_core_configfs.h>
47 #include <target/configfs_macros.h>
48
49 #include "target_core_alua.h"
50 #include "target_core_hba.h"
51 #include "target_core_pr.h"
52 #include "target_core_rd.h"
53 #include "target_core_stat.h"
54
55 extern struct t10_alua_lu_gp *default_lu_gp;
56
57 static struct list_head g_tf_list;
58 static struct mutex g_tf_lock;
59
60 struct target_core_configfs_attribute {
61 struct configfs_attribute attr;
62 ssize_t (*show)(void *, char *);
63 ssize_t (*store)(void *, const char *, size_t);
64 };
65
66 static struct config_group target_core_hbagroup;
67 static struct config_group alua_group;
68 static struct config_group alua_lu_gps_group;
69
70 static DEFINE_SPINLOCK(se_device_lock);
71 static LIST_HEAD(se_dev_list);
72
73 static inline struct se_hba *
74 item_to_hba(struct config_item *item)
75 {
76 return container_of(to_config_group(item), struct se_hba, hba_group);
77 }
78
79 /*
80 * Attributes for /sys/kernel/config/target/
81 */
82 static ssize_t target_core_attr_show(struct config_item *item,
83 struct configfs_attribute *attr,
84 char *page)
85 {
86 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
87 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
88 utsname()->sysname, utsname()->machine);
89 }
90
91 static struct configfs_item_operations target_core_fabric_item_ops = {
92 .show_attribute = target_core_attr_show,
93 };
94
95 static struct configfs_attribute target_core_item_attr_version = {
96 .ca_owner = THIS_MODULE,
97 .ca_name = "version",
98 .ca_mode = S_IRUGO,
99 };
100
101 static struct target_fabric_configfs *target_core_get_fabric(
102 const char *name)
103 {
104 struct target_fabric_configfs *tf;
105
106 if (!name)
107 return NULL;
108
109 mutex_lock(&g_tf_lock);
110 list_for_each_entry(tf, &g_tf_list, tf_list) {
111 if (!strcmp(tf->tf_name, name)) {
112 atomic_inc(&tf->tf_access_cnt);
113 mutex_unlock(&g_tf_lock);
114 return tf;
115 }
116 }
117 mutex_unlock(&g_tf_lock);
118
119 return NULL;
120 }
121
122 /*
123 * Called from struct target_core_group_ops->make_group()
124 */
125 static struct config_group *target_core_register_fabric(
126 struct config_group *group,
127 const char *name)
128 {
129 struct target_fabric_configfs *tf;
130 int ret;
131
132 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
133 " %s\n", group, name);
134 /*
135 * Ensure that TCM subsystem plugins are loaded at this point for
136 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
137 * LUN symlinks.
138 */
139 if (transport_subsystem_check_init() < 0)
140 return ERR_PTR(-EINVAL);
141
142 /*
143 * Below are some hardcoded request_module() calls to automatically
144 * local fabric modules when the following is called:
145 *
146 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
147 *
148 * Note that this does not limit which TCM fabric module can be
149 * registered, but simply provids auto loading logic for modules with
150 * mkdir(2) system calls with known TCM fabric modules.
151 */
152 if (!strncmp(name, "iscsi", 5)) {
153 /*
154 * Automatically load the LIO Target fabric module when the
155 * following is called:
156 *
157 * mkdir -p $CONFIGFS/target/iscsi
158 */
159 ret = request_module("iscsi_target_mod");
160 if (ret < 0) {
161 pr_err("request_module() failed for"
162 " iscsi_target_mod.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 } else if (!strncmp(name, "loopback", 8)) {
166 /*
167 * Automatically load the tcm_loop fabric module when the
168 * following is called:
169 *
170 * mkdir -p $CONFIGFS/target/loopback
171 */
172 ret = request_module("tcm_loop");
173 if (ret < 0) {
174 pr_err("request_module() failed for"
175 " tcm_loop.ko: %d\n", ret);
176 return ERR_PTR(-EINVAL);
177 }
178 }
179
180 tf = target_core_get_fabric(name);
181 if (!tf) {
182 pr_err("target_core_get_fabric() failed for %s\n",
183 name);
184 return ERR_PTR(-EINVAL);
185 }
186 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
187 " %s\n", tf->tf_name);
188 /*
189 * On a successful target_core_get_fabric() look, the returned
190 * struct target_fabric_configfs *tf will contain a usage reference.
191 */
192 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
193 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
194
195 tf->tf_group.default_groups = tf->tf_default_groups;
196 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
197 tf->tf_group.default_groups[1] = NULL;
198
199 config_group_init_type_name(&tf->tf_group, name,
200 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
201 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
202 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
203
204 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
205 " %s\n", tf->tf_group.cg_item.ci_name);
206 /*
207 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
208 */
209 tf->tf_ops.tf_subsys = tf->tf_subsys;
210 tf->tf_fabric = &tf->tf_group.cg_item;
211 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
212 " for %s\n", name);
213
214 return &tf->tf_group;
215 }
216
217 /*
218 * Called from struct target_core_group_ops->drop_item()
219 */
220 static void target_core_deregister_fabric(
221 struct config_group *group,
222 struct config_item *item)
223 {
224 struct target_fabric_configfs *tf = container_of(
225 to_config_group(item), struct target_fabric_configfs, tf_group);
226 struct config_group *tf_group;
227 struct config_item *df_item;
228 int i;
229
230 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
231 " tf list\n", config_item_name(item));
232
233 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
234 " %s\n", tf->tf_name);
235 atomic_dec(&tf->tf_access_cnt);
236
237 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
238 " tf->tf_fabric for %s\n", tf->tf_name);
239 tf->tf_fabric = NULL;
240
241 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
242 " %s\n", config_item_name(item));
243
244 tf_group = &tf->tf_group;
245 for (i = 0; tf_group->default_groups[i]; i++) {
246 df_item = &tf_group->default_groups[i]->cg_item;
247 tf_group->default_groups[i] = NULL;
248 config_item_put(df_item);
249 }
250 config_item_put(item);
251 }
252
253 static struct configfs_group_operations target_core_fabric_group_ops = {
254 .make_group = &target_core_register_fabric,
255 .drop_item = &target_core_deregister_fabric,
256 };
257
258 /*
259 * All item attributes appearing in /sys/kernel/target/ appear here.
260 */
261 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
262 &target_core_item_attr_version,
263 NULL,
264 };
265
266 /*
267 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
268 */
269 static struct config_item_type target_core_fabrics_item = {
270 .ct_item_ops = &target_core_fabric_item_ops,
271 .ct_group_ops = &target_core_fabric_group_ops,
272 .ct_attrs = target_core_fabric_item_attrs,
273 .ct_owner = THIS_MODULE,
274 };
275
276 static struct configfs_subsystem target_core_fabrics = {
277 .su_group = {
278 .cg_item = {
279 .ci_namebuf = "target",
280 .ci_type = &target_core_fabrics_item,
281 },
282 },
283 };
284
285 static struct configfs_subsystem *target_core_subsystem[] = {
286 &target_core_fabrics,
287 NULL,
288 };
289
290 /*##############################################################################
291 // Start functions called by external Target Fabrics Modules
292 //############################################################################*/
293
294 /*
295 * First function called by fabric modules to:
296 *
297 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
298 * 2) Add struct target_fabric_configfs to g_tf_list
299 * 3) Return struct target_fabric_configfs to fabric module to be passed
300 * into target_fabric_configfs_register().
301 */
302 struct target_fabric_configfs *target_fabric_configfs_init(
303 struct module *fabric_mod,
304 const char *name)
305 {
306 struct target_fabric_configfs *tf;
307
308 if (!(name)) {
309 pr_err("Unable to locate passed fabric name\n");
310 return ERR_PTR(-EINVAL);
311 }
312 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
313 pr_err("Passed name: %s exceeds TARGET_FABRIC"
314 "_NAME_SIZE\n", name);
315 return ERR_PTR(-EINVAL);
316 }
317
318 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
319 if (!tf)
320 return ERR_PTR(-ENOMEM);
321
322 INIT_LIST_HEAD(&tf->tf_list);
323 atomic_set(&tf->tf_access_cnt, 0);
324 /*
325 * Setup the default generic struct config_item_type's (cits) in
326 * struct target_fabric_configfs->tf_cit_tmpl
327 */
328 tf->tf_module = fabric_mod;
329 target_fabric_setup_cits(tf);
330
331 tf->tf_subsys = target_core_subsystem[0];
332 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
333
334 mutex_lock(&g_tf_lock);
335 list_add_tail(&tf->tf_list, &g_tf_list);
336 mutex_unlock(&g_tf_lock);
337
338 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
339 ">>>>>>>>>>>>>>\n");
340 pr_debug("Initialized struct target_fabric_configfs: %p for"
341 " %s\n", tf, tf->tf_name);
342 return tf;
343 }
344 EXPORT_SYMBOL(target_fabric_configfs_init);
345
346 /*
347 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
348 */
349 void target_fabric_configfs_free(
350 struct target_fabric_configfs *tf)
351 {
352 mutex_lock(&g_tf_lock);
353 list_del(&tf->tf_list);
354 mutex_unlock(&g_tf_lock);
355
356 kfree(tf);
357 }
358 EXPORT_SYMBOL(target_fabric_configfs_free);
359
360 /*
361 * Perform a sanity check of the passed tf->tf_ops before completing
362 * TCM fabric module registration.
363 */
364 static int target_fabric_tf_ops_check(
365 struct target_fabric_configfs *tf)
366 {
367 struct target_core_fabric_ops *tfo = &tf->tf_ops;
368
369 if (!tfo->get_fabric_name) {
370 pr_err("Missing tfo->get_fabric_name()\n");
371 return -EINVAL;
372 }
373 if (!tfo->get_fabric_proto_ident) {
374 pr_err("Missing tfo->get_fabric_proto_ident()\n");
375 return -EINVAL;
376 }
377 if (!tfo->tpg_get_wwn) {
378 pr_err("Missing tfo->tpg_get_wwn()\n");
379 return -EINVAL;
380 }
381 if (!tfo->tpg_get_tag) {
382 pr_err("Missing tfo->tpg_get_tag()\n");
383 return -EINVAL;
384 }
385 if (!tfo->tpg_get_default_depth) {
386 pr_err("Missing tfo->tpg_get_default_depth()\n");
387 return -EINVAL;
388 }
389 if (!tfo->tpg_get_pr_transport_id) {
390 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
391 return -EINVAL;
392 }
393 if (!tfo->tpg_get_pr_transport_id_len) {
394 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
395 return -EINVAL;
396 }
397 if (!tfo->tpg_check_demo_mode) {
398 pr_err("Missing tfo->tpg_check_demo_mode()\n");
399 return -EINVAL;
400 }
401 if (!tfo->tpg_check_demo_mode_cache) {
402 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
403 return -EINVAL;
404 }
405 if (!tfo->tpg_check_demo_mode_write_protect) {
406 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
407 return -EINVAL;
408 }
409 if (!tfo->tpg_check_prod_mode_write_protect) {
410 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
411 return -EINVAL;
412 }
413 if (!tfo->tpg_alloc_fabric_acl) {
414 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
415 return -EINVAL;
416 }
417 if (!tfo->tpg_release_fabric_acl) {
418 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
419 return -EINVAL;
420 }
421 if (!tfo->tpg_get_inst_index) {
422 pr_err("Missing tfo->tpg_get_inst_index()\n");
423 return -EINVAL;
424 }
425 if (!tfo->release_cmd) {
426 pr_err("Missing tfo->release_cmd()\n");
427 return -EINVAL;
428 }
429 if (!tfo->shutdown_session) {
430 pr_err("Missing tfo->shutdown_session()\n");
431 return -EINVAL;
432 }
433 if (!tfo->close_session) {
434 pr_err("Missing tfo->close_session()\n");
435 return -EINVAL;
436 }
437 if (!tfo->stop_session) {
438 pr_err("Missing tfo->stop_session()\n");
439 return -EINVAL;
440 }
441 if (!tfo->fall_back_to_erl0) {
442 pr_err("Missing tfo->fall_back_to_erl0()\n");
443 return -EINVAL;
444 }
445 if (!tfo->sess_logged_in) {
446 pr_err("Missing tfo->sess_logged_in()\n");
447 return -EINVAL;
448 }
449 if (!tfo->sess_get_index) {
450 pr_err("Missing tfo->sess_get_index()\n");
451 return -EINVAL;
452 }
453 if (!tfo->write_pending) {
454 pr_err("Missing tfo->write_pending()\n");
455 return -EINVAL;
456 }
457 if (!tfo->write_pending_status) {
458 pr_err("Missing tfo->write_pending_status()\n");
459 return -EINVAL;
460 }
461 if (!tfo->set_default_node_attributes) {
462 pr_err("Missing tfo->set_default_node_attributes()\n");
463 return -EINVAL;
464 }
465 if (!tfo->get_task_tag) {
466 pr_err("Missing tfo->get_task_tag()\n");
467 return -EINVAL;
468 }
469 if (!tfo->get_cmd_state) {
470 pr_err("Missing tfo->get_cmd_state()\n");
471 return -EINVAL;
472 }
473 if (!tfo->queue_data_in) {
474 pr_err("Missing tfo->queue_data_in()\n");
475 return -EINVAL;
476 }
477 if (!tfo->queue_status) {
478 pr_err("Missing tfo->queue_status()\n");
479 return -EINVAL;
480 }
481 if (!tfo->queue_tm_rsp) {
482 pr_err("Missing tfo->queue_tm_rsp()\n");
483 return -EINVAL;
484 }
485 if (!tfo->set_fabric_sense_len) {
486 pr_err("Missing tfo->set_fabric_sense_len()\n");
487 return -EINVAL;
488 }
489 if (!tfo->get_fabric_sense_len) {
490 pr_err("Missing tfo->get_fabric_sense_len()\n");
491 return -EINVAL;
492 }
493 if (!tfo->is_state_remove) {
494 pr_err("Missing tfo->is_state_remove()\n");
495 return -EINVAL;
496 }
497 /*
498 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
499 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
500 * target_core_fabric_configfs.c WWN+TPG group context code.
501 */
502 if (!tfo->fabric_make_wwn) {
503 pr_err("Missing tfo->fabric_make_wwn()\n");
504 return -EINVAL;
505 }
506 if (!tfo->fabric_drop_wwn) {
507 pr_err("Missing tfo->fabric_drop_wwn()\n");
508 return -EINVAL;
509 }
510 if (!tfo->fabric_make_tpg) {
511 pr_err("Missing tfo->fabric_make_tpg()\n");
512 return -EINVAL;
513 }
514 if (!tfo->fabric_drop_tpg) {
515 pr_err("Missing tfo->fabric_drop_tpg()\n");
516 return -EINVAL;
517 }
518
519 return 0;
520 }
521
522 /*
523 * Called 2nd from fabric module with returned parameter of
524 * struct target_fabric_configfs * from target_fabric_configfs_init().
525 *
526 * Upon a successful registration, the new fabric's struct config_item is
527 * return. Also, a pointer to this struct is set in the passed
528 * struct target_fabric_configfs.
529 */
530 int target_fabric_configfs_register(
531 struct target_fabric_configfs *tf)
532 {
533 int ret;
534
535 if (!tf) {
536 pr_err("Unable to locate target_fabric_configfs"
537 " pointer\n");
538 return -EINVAL;
539 }
540 if (!tf->tf_subsys) {
541 pr_err("Unable to target struct config_subsystem"
542 " pointer\n");
543 return -EINVAL;
544 }
545 ret = target_fabric_tf_ops_check(tf);
546 if (ret < 0)
547 return ret;
548
549 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
550 ">>>>>>>>>>\n");
551 return 0;
552 }
553 EXPORT_SYMBOL(target_fabric_configfs_register);
554
555 void target_fabric_configfs_deregister(
556 struct target_fabric_configfs *tf)
557 {
558 struct configfs_subsystem *su;
559
560 if (!tf) {
561 pr_err("Unable to locate passed target_fabric_"
562 "configfs\n");
563 return;
564 }
565 su = tf->tf_subsys;
566 if (!su) {
567 pr_err("Unable to locate passed tf->tf_subsys"
568 " pointer\n");
569 return;
570 }
571 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
572 ">>>>>>>>>>>>\n");
573 mutex_lock(&g_tf_lock);
574 if (atomic_read(&tf->tf_access_cnt)) {
575 mutex_unlock(&g_tf_lock);
576 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
577 tf->tf_name);
578 BUG();
579 }
580 list_del(&tf->tf_list);
581 mutex_unlock(&g_tf_lock);
582
583 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
584 " %s\n", tf->tf_name);
585 tf->tf_module = NULL;
586 tf->tf_subsys = NULL;
587 kfree(tf);
588
589 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
590 ">>>>>\n");
591 }
592 EXPORT_SYMBOL(target_fabric_configfs_deregister);
593
594 /*##############################################################################
595 // Stop functions called by external Target Fabrics Modules
596 //############################################################################*/
597
598 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
599
600 #define DEF_DEV_ATTRIB_SHOW(_name) \
601 static ssize_t target_core_dev_show_attr_##_name( \
602 struct se_dev_attrib *da, \
603 char *page) \
604 { \
605 struct se_device *dev; \
606 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
607 ssize_t rb; \
608 \
609 spin_lock(&se_dev->se_dev_lock); \
610 dev = se_dev->se_dev_ptr; \
611 if (!dev) { \
612 spin_unlock(&se_dev->se_dev_lock); \
613 return -ENODEV; \
614 } \
615 rb = snprintf(page, PAGE_SIZE, "%u\n", \
616 (u32)dev->se_sub_dev->se_dev_attrib._name); \
617 spin_unlock(&se_dev->se_dev_lock); \
618 \
619 return rb; \
620 }
621
622 #define DEF_DEV_ATTRIB_STORE(_name) \
623 static ssize_t target_core_dev_store_attr_##_name( \
624 struct se_dev_attrib *da, \
625 const char *page, \
626 size_t count) \
627 { \
628 struct se_device *dev; \
629 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
630 unsigned long val; \
631 int ret; \
632 \
633 spin_lock(&se_dev->se_dev_lock); \
634 dev = se_dev->se_dev_ptr; \
635 if (!dev) { \
636 spin_unlock(&se_dev->se_dev_lock); \
637 return -ENODEV; \
638 } \
639 ret = strict_strtoul(page, 0, &val); \
640 if (ret < 0) { \
641 spin_unlock(&se_dev->se_dev_lock); \
642 pr_err("strict_strtoul() failed with" \
643 " ret: %d\n", ret); \
644 return -EINVAL; \
645 } \
646 ret = se_dev_set_##_name(dev, (u32)val); \
647 spin_unlock(&se_dev->se_dev_lock); \
648 \
649 return (!ret) ? count : -EINVAL; \
650 }
651
652 #define DEF_DEV_ATTRIB(_name) \
653 DEF_DEV_ATTRIB_SHOW(_name); \
654 DEF_DEV_ATTRIB_STORE(_name);
655
656 #define DEF_DEV_ATTRIB_RO(_name) \
657 DEF_DEV_ATTRIB_SHOW(_name);
658
659 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
660 #define SE_DEV_ATTR(_name, _mode) \
661 static struct target_core_dev_attrib_attribute \
662 target_core_dev_attrib_##_name = \
663 __CONFIGFS_EATTR(_name, _mode, \
664 target_core_dev_show_attr_##_name, \
665 target_core_dev_store_attr_##_name);
666
667 #define SE_DEV_ATTR_RO(_name); \
668 static struct target_core_dev_attrib_attribute \
669 target_core_dev_attrib_##_name = \
670 __CONFIGFS_EATTR_RO(_name, \
671 target_core_dev_show_attr_##_name);
672
673 DEF_DEV_ATTRIB(emulate_dpo);
674 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
675
676 DEF_DEV_ATTRIB(emulate_fua_write);
677 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
678
679 DEF_DEV_ATTRIB(emulate_fua_read);
680 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
681
682 DEF_DEV_ATTRIB(emulate_write_cache);
683 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
684
685 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
686 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
687
688 DEF_DEV_ATTRIB(emulate_tas);
689 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
690
691 DEF_DEV_ATTRIB(emulate_tpu);
692 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
693
694 DEF_DEV_ATTRIB(emulate_tpws);
695 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
696
697 DEF_DEV_ATTRIB(enforce_pr_isids);
698 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
699
700 DEF_DEV_ATTRIB(is_nonrot);
701 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
702
703 DEF_DEV_ATTRIB(emulate_rest_reord);
704 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
705
706 DEF_DEV_ATTRIB_RO(hw_block_size);
707 SE_DEV_ATTR_RO(hw_block_size);
708
709 DEF_DEV_ATTRIB(block_size);
710 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
711
712 DEF_DEV_ATTRIB_RO(hw_max_sectors);
713 SE_DEV_ATTR_RO(hw_max_sectors);
714
715 DEF_DEV_ATTRIB(max_sectors);
716 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
717
718 DEF_DEV_ATTRIB(optimal_sectors);
719 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
720
721 DEF_DEV_ATTRIB_RO(hw_queue_depth);
722 SE_DEV_ATTR_RO(hw_queue_depth);
723
724 DEF_DEV_ATTRIB(queue_depth);
725 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
726
727 DEF_DEV_ATTRIB(task_timeout);
728 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
729
730 DEF_DEV_ATTRIB(max_unmap_lba_count);
731 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
732
733 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
734 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
735
736 DEF_DEV_ATTRIB(unmap_granularity);
737 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
738
739 DEF_DEV_ATTRIB(unmap_granularity_alignment);
740 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
741
742 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
743
744 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
745 &target_core_dev_attrib_emulate_dpo.attr,
746 &target_core_dev_attrib_emulate_fua_write.attr,
747 &target_core_dev_attrib_emulate_fua_read.attr,
748 &target_core_dev_attrib_emulate_write_cache.attr,
749 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
750 &target_core_dev_attrib_emulate_tas.attr,
751 &target_core_dev_attrib_emulate_tpu.attr,
752 &target_core_dev_attrib_emulate_tpws.attr,
753 &target_core_dev_attrib_enforce_pr_isids.attr,
754 &target_core_dev_attrib_is_nonrot.attr,
755 &target_core_dev_attrib_emulate_rest_reord.attr,
756 &target_core_dev_attrib_hw_block_size.attr,
757 &target_core_dev_attrib_block_size.attr,
758 &target_core_dev_attrib_hw_max_sectors.attr,
759 &target_core_dev_attrib_max_sectors.attr,
760 &target_core_dev_attrib_optimal_sectors.attr,
761 &target_core_dev_attrib_hw_queue_depth.attr,
762 &target_core_dev_attrib_queue_depth.attr,
763 &target_core_dev_attrib_task_timeout.attr,
764 &target_core_dev_attrib_max_unmap_lba_count.attr,
765 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
766 &target_core_dev_attrib_unmap_granularity.attr,
767 &target_core_dev_attrib_unmap_granularity_alignment.attr,
768 NULL,
769 };
770
771 static struct configfs_item_operations target_core_dev_attrib_ops = {
772 .show_attribute = target_core_dev_attrib_attr_show,
773 .store_attribute = target_core_dev_attrib_attr_store,
774 };
775
776 static struct config_item_type target_core_dev_attrib_cit = {
777 .ct_item_ops = &target_core_dev_attrib_ops,
778 .ct_attrs = target_core_dev_attrib_attrs,
779 .ct_owner = THIS_MODULE,
780 };
781
782 /* End functions for struct config_item_type target_core_dev_attrib_cit */
783
784 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
785
786 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
787 #define SE_DEV_WWN_ATTR(_name, _mode) \
788 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
789 __CONFIGFS_EATTR(_name, _mode, \
790 target_core_dev_wwn_show_attr_##_name, \
791 target_core_dev_wwn_store_attr_##_name);
792
793 #define SE_DEV_WWN_ATTR_RO(_name); \
794 do { \
795 static struct target_core_dev_wwn_attribute \
796 target_core_dev_wwn_##_name = \
797 __CONFIGFS_EATTR_RO(_name, \
798 target_core_dev_wwn_show_attr_##_name); \
799 } while (0);
800
801 /*
802 * VPD page 0x80 Unit serial
803 */
804 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
805 struct t10_wwn *t10_wwn,
806 char *page)
807 {
808 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
809 struct se_device *dev;
810
811 dev = se_dev->se_dev_ptr;
812 if (!dev)
813 return -ENODEV;
814
815 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
816 &t10_wwn->unit_serial[0]);
817 }
818
819 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
820 struct t10_wwn *t10_wwn,
821 const char *page,
822 size_t count)
823 {
824 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
825 struct se_device *dev;
826 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
827
828 /*
829 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
830 * from the struct scsi_device level firmware, do not allow
831 * VPD Unit Serial to be emulated.
832 *
833 * Note this struct scsi_device could also be emulating VPD
834 * information from its drivers/scsi LLD. But for now we assume
835 * it is doing 'the right thing' wrt a world wide unique
836 * VPD Unit Serial Number that OS dependent multipath can depend on.
837 */
838 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
839 pr_err("Underlying SCSI device firmware provided VPD"
840 " Unit Serial, ignoring request\n");
841 return -EOPNOTSUPP;
842 }
843
844 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
845 pr_err("Emulated VPD Unit Serial exceeds"
846 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
847 return -EOVERFLOW;
848 }
849 /*
850 * Check to see if any active $FABRIC_MOD exports exist. If they
851 * do exist, fail here as changing this information on the fly
852 * (underneath the initiator side OS dependent multipath code)
853 * could cause negative effects.
854 */
855 dev = su_dev->se_dev_ptr;
856 if (dev) {
857 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
858 pr_err("Unable to set VPD Unit Serial while"
859 " active %d $FABRIC_MOD exports exist\n",
860 atomic_read(&dev->dev_export_obj.obj_access_count));
861 return -EINVAL;
862 }
863 }
864 /*
865 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
866 *
867 * Also, strip any newline added from the userspace
868 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
869 */
870 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
871 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
872 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
873 "%s", strstrip(buf));
874 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
875
876 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
877 " %s\n", su_dev->t10_wwn.unit_serial);
878
879 return count;
880 }
881
882 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
883
884 /*
885 * VPD page 0x83 Protocol Identifier
886 */
887 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
888 struct t10_wwn *t10_wwn,
889 char *page)
890 {
891 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
892 struct se_device *dev;
893 struct t10_vpd *vpd;
894 unsigned char buf[VPD_TMP_BUF_SIZE];
895 ssize_t len = 0;
896
897 dev = se_dev->se_dev_ptr;
898 if (!dev)
899 return -ENODEV;
900
901 memset(buf, 0, VPD_TMP_BUF_SIZE);
902
903 spin_lock(&t10_wwn->t10_vpd_lock);
904 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
905 if (!vpd->protocol_identifier_set)
906 continue;
907
908 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
909
910 if (len + strlen(buf) >= PAGE_SIZE)
911 break;
912
913 len += sprintf(page+len, "%s", buf);
914 }
915 spin_unlock(&t10_wwn->t10_vpd_lock);
916
917 return len;
918 }
919
920 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
921 struct t10_wwn *t10_wwn,
922 const char *page,
923 size_t count)
924 {
925 return -ENOSYS;
926 }
927
928 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
929
930 /*
931 * Generic wrapper for dumping VPD identifiers by association.
932 */
933 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
934 static ssize_t target_core_dev_wwn_show_attr_##_name( \
935 struct t10_wwn *t10_wwn, \
936 char *page) \
937 { \
938 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
939 struct se_device *dev; \
940 struct t10_vpd *vpd; \
941 unsigned char buf[VPD_TMP_BUF_SIZE]; \
942 ssize_t len = 0; \
943 \
944 dev = se_dev->se_dev_ptr; \
945 if (!dev) \
946 return -ENODEV; \
947 \
948 spin_lock(&t10_wwn->t10_vpd_lock); \
949 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
950 if (vpd->association != _assoc) \
951 continue; \
952 \
953 memset(buf, 0, VPD_TMP_BUF_SIZE); \
954 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
955 if (len + strlen(buf) >= PAGE_SIZE) \
956 break; \
957 len += sprintf(page+len, "%s", buf); \
958 \
959 memset(buf, 0, VPD_TMP_BUF_SIZE); \
960 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
961 if (len + strlen(buf) >= PAGE_SIZE) \
962 break; \
963 len += sprintf(page+len, "%s", buf); \
964 \
965 memset(buf, 0, VPD_TMP_BUF_SIZE); \
966 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
967 if (len + strlen(buf) >= PAGE_SIZE) \
968 break; \
969 len += sprintf(page+len, "%s", buf); \
970 } \
971 spin_unlock(&t10_wwn->t10_vpd_lock); \
972 \
973 return len; \
974 }
975
976 /*
977 * VPD page 0x83 Association: Logical Unit
978 */
979 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
980
981 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
982 struct t10_wwn *t10_wwn,
983 const char *page,
984 size_t count)
985 {
986 return -ENOSYS;
987 }
988
989 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
990
991 /*
992 * VPD page 0x83 Association: Target Port
993 */
994 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
995
996 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
997 struct t10_wwn *t10_wwn,
998 const char *page,
999 size_t count)
1000 {
1001 return -ENOSYS;
1002 }
1003
1004 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1005
1006 /*
1007 * VPD page 0x83 Association: SCSI Target Device
1008 */
1009 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1010
1011 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1012 struct t10_wwn *t10_wwn,
1013 const char *page,
1014 size_t count)
1015 {
1016 return -ENOSYS;
1017 }
1018
1019 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1020
1021 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1022
1023 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1024 &target_core_dev_wwn_vpd_unit_serial.attr,
1025 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1026 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1027 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1028 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1029 NULL,
1030 };
1031
1032 static struct configfs_item_operations target_core_dev_wwn_ops = {
1033 .show_attribute = target_core_dev_wwn_attr_show,
1034 .store_attribute = target_core_dev_wwn_attr_store,
1035 };
1036
1037 static struct config_item_type target_core_dev_wwn_cit = {
1038 .ct_item_ops = &target_core_dev_wwn_ops,
1039 .ct_attrs = target_core_dev_wwn_attrs,
1040 .ct_owner = THIS_MODULE,
1041 };
1042
1043 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1044
1045 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1046
1047 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1048 #define SE_DEV_PR_ATTR(_name, _mode) \
1049 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1050 __CONFIGFS_EATTR(_name, _mode, \
1051 target_core_dev_pr_show_attr_##_name, \
1052 target_core_dev_pr_store_attr_##_name);
1053
1054 #define SE_DEV_PR_ATTR_RO(_name); \
1055 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1056 __CONFIGFS_EATTR_RO(_name, \
1057 target_core_dev_pr_show_attr_##_name);
1058
1059 /*
1060 * res_holder
1061 */
1062 static ssize_t target_core_dev_pr_show_spc3_res(
1063 struct se_device *dev,
1064 char *page,
1065 ssize_t *len)
1066 {
1067 struct se_node_acl *se_nacl;
1068 struct t10_pr_registration *pr_reg;
1069 char i_buf[PR_REG_ISID_ID_LEN];
1070 int prf_isid;
1071
1072 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1073
1074 spin_lock(&dev->dev_reservation_lock);
1075 pr_reg = dev->dev_pr_res_holder;
1076 if (!pr_reg) {
1077 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1078 spin_unlock(&dev->dev_reservation_lock);
1079 return *len;
1080 }
1081 se_nacl = pr_reg->pr_reg_nacl;
1082 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1083 PR_REG_ISID_ID_LEN);
1084
1085 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1086 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1087 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1088 spin_unlock(&dev->dev_reservation_lock);
1089
1090 return *len;
1091 }
1092
1093 static ssize_t target_core_dev_pr_show_spc2_res(
1094 struct se_device *dev,
1095 char *page,
1096 ssize_t *len)
1097 {
1098 struct se_node_acl *se_nacl;
1099
1100 spin_lock(&dev->dev_reservation_lock);
1101 se_nacl = dev->dev_reserved_node_acl;
1102 if (!se_nacl) {
1103 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1104 spin_unlock(&dev->dev_reservation_lock);
1105 return *len;
1106 }
1107 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1108 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1109 se_nacl->initiatorname);
1110 spin_unlock(&dev->dev_reservation_lock);
1111
1112 return *len;
1113 }
1114
1115 static ssize_t target_core_dev_pr_show_attr_res_holder(
1116 struct se_subsystem_dev *su_dev,
1117 char *page)
1118 {
1119 ssize_t len = 0;
1120
1121 if (!su_dev->se_dev_ptr)
1122 return -ENODEV;
1123
1124 switch (su_dev->t10_pr.res_type) {
1125 case SPC3_PERSISTENT_RESERVATIONS:
1126 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1127 page, &len);
1128 break;
1129 case SPC2_RESERVATIONS:
1130 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1131 page, &len);
1132 break;
1133 case SPC_PASSTHROUGH:
1134 len += sprintf(page+len, "Passthrough\n");
1135 break;
1136 default:
1137 len += sprintf(page+len, "Unknown\n");
1138 break;
1139 }
1140
1141 return len;
1142 }
1143
1144 SE_DEV_PR_ATTR_RO(res_holder);
1145
1146 /*
1147 * res_pr_all_tgt_pts
1148 */
1149 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1150 struct se_subsystem_dev *su_dev,
1151 char *page)
1152 {
1153 struct se_device *dev;
1154 struct t10_pr_registration *pr_reg;
1155 ssize_t len = 0;
1156
1157 dev = su_dev->se_dev_ptr;
1158 if (!dev)
1159 return -ENODEV;
1160
1161 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1162 return len;
1163
1164 spin_lock(&dev->dev_reservation_lock);
1165 pr_reg = dev->dev_pr_res_holder;
1166 if (!pr_reg) {
1167 len = sprintf(page, "No SPC-3 Reservation holder\n");
1168 spin_unlock(&dev->dev_reservation_lock);
1169 return len;
1170 }
1171 /*
1172 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1173 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1174 */
1175 if (pr_reg->pr_reg_all_tg_pt)
1176 len = sprintf(page, "SPC-3 Reservation: All Target"
1177 " Ports registration\n");
1178 else
1179 len = sprintf(page, "SPC-3 Reservation: Single"
1180 " Target Port registration\n");
1181 spin_unlock(&dev->dev_reservation_lock);
1182
1183 return len;
1184 }
1185
1186 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1187
1188 /*
1189 * res_pr_generation
1190 */
1191 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1192 struct se_subsystem_dev *su_dev,
1193 char *page)
1194 {
1195 if (!su_dev->se_dev_ptr)
1196 return -ENODEV;
1197
1198 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1199 return 0;
1200
1201 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1202 }
1203
1204 SE_DEV_PR_ATTR_RO(res_pr_generation);
1205
1206 /*
1207 * res_pr_holder_tg_port
1208 */
1209 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1210 struct se_subsystem_dev *su_dev,
1211 char *page)
1212 {
1213 struct se_device *dev;
1214 struct se_node_acl *se_nacl;
1215 struct se_lun *lun;
1216 struct se_portal_group *se_tpg;
1217 struct t10_pr_registration *pr_reg;
1218 struct target_core_fabric_ops *tfo;
1219 ssize_t len = 0;
1220
1221 dev = su_dev->se_dev_ptr;
1222 if (!dev)
1223 return -ENODEV;
1224
1225 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1226 return len;
1227
1228 spin_lock(&dev->dev_reservation_lock);
1229 pr_reg = dev->dev_pr_res_holder;
1230 if (!pr_reg) {
1231 len = sprintf(page, "No SPC-3 Reservation holder\n");
1232 spin_unlock(&dev->dev_reservation_lock);
1233 return len;
1234 }
1235 se_nacl = pr_reg->pr_reg_nacl;
1236 se_tpg = se_nacl->se_tpg;
1237 lun = pr_reg->pr_reg_tg_pt_lun;
1238 tfo = se_tpg->se_tpg_tfo;
1239
1240 len += sprintf(page+len, "SPC-3 Reservation: %s"
1241 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1242 tfo->tpg_get_wwn(se_tpg));
1243 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1244 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1245 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1246 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1247 tfo->get_fabric_name(), lun->unpacked_lun);
1248 spin_unlock(&dev->dev_reservation_lock);
1249
1250 return len;
1251 }
1252
1253 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1254
1255 /*
1256 * res_pr_registered_i_pts
1257 */
1258 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1259 struct se_subsystem_dev *su_dev,
1260 char *page)
1261 {
1262 struct target_core_fabric_ops *tfo;
1263 struct t10_pr_registration *pr_reg;
1264 unsigned char buf[384];
1265 char i_buf[PR_REG_ISID_ID_LEN];
1266 ssize_t len = 0;
1267 int reg_count = 0, prf_isid;
1268
1269 if (!su_dev->se_dev_ptr)
1270 return -ENODEV;
1271
1272 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1273 return len;
1274
1275 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1276
1277 spin_lock(&su_dev->t10_pr.registration_lock);
1278 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1279 pr_reg_list) {
1280
1281 memset(buf, 0, 384);
1282 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1283 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1284 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1285 PR_REG_ISID_ID_LEN);
1286 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1287 tfo->get_fabric_name(),
1288 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1289 &i_buf[0] : "", pr_reg->pr_res_key,
1290 pr_reg->pr_res_generation);
1291
1292 if (len + strlen(buf) >= PAGE_SIZE)
1293 break;
1294
1295 len += sprintf(page+len, "%s", buf);
1296 reg_count++;
1297 }
1298 spin_unlock(&su_dev->t10_pr.registration_lock);
1299
1300 if (!reg_count)
1301 len += sprintf(page+len, "None\n");
1302
1303 return len;
1304 }
1305
1306 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1307
1308 /*
1309 * res_pr_type
1310 */
1311 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1312 struct se_subsystem_dev *su_dev,
1313 char *page)
1314 {
1315 struct se_device *dev;
1316 struct t10_pr_registration *pr_reg;
1317 ssize_t len = 0;
1318
1319 dev = su_dev->se_dev_ptr;
1320 if (!dev)
1321 return -ENODEV;
1322
1323 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1324 return len;
1325
1326 spin_lock(&dev->dev_reservation_lock);
1327 pr_reg = dev->dev_pr_res_holder;
1328 if (!pr_reg) {
1329 len = sprintf(page, "No SPC-3 Reservation holder\n");
1330 spin_unlock(&dev->dev_reservation_lock);
1331 return len;
1332 }
1333 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1334 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1335 spin_unlock(&dev->dev_reservation_lock);
1336
1337 return len;
1338 }
1339
1340 SE_DEV_PR_ATTR_RO(res_pr_type);
1341
1342 /*
1343 * res_type
1344 */
1345 static ssize_t target_core_dev_pr_show_attr_res_type(
1346 struct se_subsystem_dev *su_dev,
1347 char *page)
1348 {
1349 ssize_t len = 0;
1350
1351 if (!su_dev->se_dev_ptr)
1352 return -ENODEV;
1353
1354 switch (su_dev->t10_pr.res_type) {
1355 case SPC3_PERSISTENT_RESERVATIONS:
1356 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1357 break;
1358 case SPC2_RESERVATIONS:
1359 len = sprintf(page, "SPC2_RESERVATIONS\n");
1360 break;
1361 case SPC_PASSTHROUGH:
1362 len = sprintf(page, "SPC_PASSTHROUGH\n");
1363 break;
1364 default:
1365 len = sprintf(page, "UNKNOWN\n");
1366 break;
1367 }
1368
1369 return len;
1370 }
1371
1372 SE_DEV_PR_ATTR_RO(res_type);
1373
1374 /*
1375 * res_aptpl_active
1376 */
1377
1378 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1379 struct se_subsystem_dev *su_dev,
1380 char *page)
1381 {
1382 if (!su_dev->se_dev_ptr)
1383 return -ENODEV;
1384
1385 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1386 return 0;
1387
1388 return sprintf(page, "APTPL Bit Status: %s\n",
1389 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1390 }
1391
1392 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1393
1394 /*
1395 * res_aptpl_metadata
1396 */
1397 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1398 struct se_subsystem_dev *su_dev,
1399 char *page)
1400 {
1401 if (!su_dev->se_dev_ptr)
1402 return -ENODEV;
1403
1404 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1405 return 0;
1406
1407 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1408 }
1409
1410 enum {
1411 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1412 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1413 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1414 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1415 };
1416
1417 static match_table_t tokens = {
1418 {Opt_initiator_fabric, "initiator_fabric=%s"},
1419 {Opt_initiator_node, "initiator_node=%s"},
1420 {Opt_initiator_sid, "initiator_sid=%s"},
1421 {Opt_sa_res_key, "sa_res_key=%s"},
1422 {Opt_res_holder, "res_holder=%d"},
1423 {Opt_res_type, "res_type=%d"},
1424 {Opt_res_scope, "res_scope=%d"},
1425 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1426 {Opt_mapped_lun, "mapped_lun=%d"},
1427 {Opt_target_fabric, "target_fabric=%s"},
1428 {Opt_target_node, "target_node=%s"},
1429 {Opt_tpgt, "tpgt=%d"},
1430 {Opt_port_rtpi, "port_rtpi=%d"},
1431 {Opt_target_lun, "target_lun=%d"},
1432 {Opt_err, NULL}
1433 };
1434
1435 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1436 struct se_subsystem_dev *su_dev,
1437 const char *page,
1438 size_t count)
1439 {
1440 struct se_device *dev;
1441 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1442 unsigned char *t_fabric = NULL, *t_port = NULL;
1443 char *orig, *ptr, *arg_p, *opts;
1444 substring_t args[MAX_OPT_ARGS];
1445 unsigned long long tmp_ll;
1446 u64 sa_res_key = 0;
1447 u32 mapped_lun = 0, target_lun = 0;
1448 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1449 u16 port_rpti = 0, tpgt = 0;
1450 u8 type = 0, scope;
1451
1452 dev = su_dev->se_dev_ptr;
1453 if (!dev)
1454 return -ENODEV;
1455
1456 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1457 return 0;
1458
1459 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1460 pr_debug("Unable to process APTPL metadata while"
1461 " active fabric exports exist\n");
1462 return -EINVAL;
1463 }
1464
1465 opts = kstrdup(page, GFP_KERNEL);
1466 if (!opts)
1467 return -ENOMEM;
1468
1469 orig = opts;
1470 while ((ptr = strsep(&opts, ",")) != NULL) {
1471 if (!*ptr)
1472 continue;
1473
1474 token = match_token(ptr, tokens, args);
1475 switch (token) {
1476 case Opt_initiator_fabric:
1477 i_fabric = match_strdup(&args[0]);
1478 if (!i_fabric) {
1479 ret = -ENOMEM;
1480 goto out;
1481 }
1482 break;
1483 case Opt_initiator_node:
1484 i_port = match_strdup(&args[0]);
1485 if (!i_port) {
1486 ret = -ENOMEM;
1487 goto out;
1488 }
1489 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1490 pr_err("APTPL metadata initiator_node="
1491 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1492 PR_APTPL_MAX_IPORT_LEN);
1493 ret = -EINVAL;
1494 break;
1495 }
1496 break;
1497 case Opt_initiator_sid:
1498 isid = match_strdup(&args[0]);
1499 if (!isid) {
1500 ret = -ENOMEM;
1501 goto out;
1502 }
1503 if (strlen(isid) >= PR_REG_ISID_LEN) {
1504 pr_err("APTPL metadata initiator_isid"
1505 "= exceeds PR_REG_ISID_LEN: %d\n",
1506 PR_REG_ISID_LEN);
1507 ret = -EINVAL;
1508 break;
1509 }
1510 break;
1511 case Opt_sa_res_key:
1512 arg_p = match_strdup(&args[0]);
1513 if (!arg_p) {
1514 ret = -ENOMEM;
1515 goto out;
1516 }
1517 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1518 if (ret < 0) {
1519 pr_err("strict_strtoull() failed for"
1520 " sa_res_key=\n");
1521 goto out;
1522 }
1523 sa_res_key = (u64)tmp_ll;
1524 break;
1525 /*
1526 * PR APTPL Metadata for Reservation
1527 */
1528 case Opt_res_holder:
1529 match_int(args, &arg);
1530 res_holder = arg;
1531 break;
1532 case Opt_res_type:
1533 match_int(args, &arg);
1534 type = (u8)arg;
1535 break;
1536 case Opt_res_scope:
1537 match_int(args, &arg);
1538 scope = (u8)arg;
1539 break;
1540 case Opt_res_all_tg_pt:
1541 match_int(args, &arg);
1542 all_tg_pt = (int)arg;
1543 break;
1544 case Opt_mapped_lun:
1545 match_int(args, &arg);
1546 mapped_lun = (u32)arg;
1547 break;
1548 /*
1549 * PR APTPL Metadata for Target Port
1550 */
1551 case Opt_target_fabric:
1552 t_fabric = match_strdup(&args[0]);
1553 if (!t_fabric) {
1554 ret = -ENOMEM;
1555 goto out;
1556 }
1557 break;
1558 case Opt_target_node:
1559 t_port = match_strdup(&args[0]);
1560 if (!t_port) {
1561 ret = -ENOMEM;
1562 goto out;
1563 }
1564 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1565 pr_err("APTPL metadata target_node="
1566 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1567 PR_APTPL_MAX_TPORT_LEN);
1568 ret = -EINVAL;
1569 break;
1570 }
1571 break;
1572 case Opt_tpgt:
1573 match_int(args, &arg);
1574 tpgt = (u16)arg;
1575 break;
1576 case Opt_port_rtpi:
1577 match_int(args, &arg);
1578 port_rpti = (u16)arg;
1579 break;
1580 case Opt_target_lun:
1581 match_int(args, &arg);
1582 target_lun = (u32)arg;
1583 break;
1584 default:
1585 break;
1586 }
1587 }
1588
1589 if (!i_port || !t_port || !sa_res_key) {
1590 pr_err("Illegal parameters for APTPL registration\n");
1591 ret = -EINVAL;
1592 goto out;
1593 }
1594
1595 if (res_holder && !(type)) {
1596 pr_err("Illegal PR type: 0x%02x for reservation"
1597 " holder\n", type);
1598 ret = -EINVAL;
1599 goto out;
1600 }
1601
1602 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1603 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1604 res_holder, all_tg_pt, type);
1605 out:
1606 kfree(i_fabric);
1607 kfree(i_port);
1608 kfree(isid);
1609 kfree(t_fabric);
1610 kfree(t_port);
1611 kfree(orig);
1612 return (ret == 0) ? count : ret;
1613 }
1614
1615 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1616
1617 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1618
1619 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1620 &target_core_dev_pr_res_holder.attr,
1621 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1622 &target_core_dev_pr_res_pr_generation.attr,
1623 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1624 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1625 &target_core_dev_pr_res_pr_type.attr,
1626 &target_core_dev_pr_res_type.attr,
1627 &target_core_dev_pr_res_aptpl_active.attr,
1628 &target_core_dev_pr_res_aptpl_metadata.attr,
1629 NULL,
1630 };
1631
1632 static struct configfs_item_operations target_core_dev_pr_ops = {
1633 .show_attribute = target_core_dev_pr_attr_show,
1634 .store_attribute = target_core_dev_pr_attr_store,
1635 };
1636
1637 static struct config_item_type target_core_dev_pr_cit = {
1638 .ct_item_ops = &target_core_dev_pr_ops,
1639 .ct_attrs = target_core_dev_pr_attrs,
1640 .ct_owner = THIS_MODULE,
1641 };
1642
1643 /* End functions for struct config_item_type target_core_dev_pr_cit */
1644
1645 /* Start functions for struct config_item_type target_core_dev_cit */
1646
1647 static ssize_t target_core_show_dev_info(void *p, char *page)
1648 {
1649 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1650 struct se_hba *hba = se_dev->se_dev_hba;
1651 struct se_subsystem_api *t = hba->transport;
1652 int bl = 0;
1653 ssize_t read_bytes = 0;
1654
1655 if (!se_dev->se_dev_ptr)
1656 return -ENODEV;
1657
1658 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1659 read_bytes += bl;
1660 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1661 return read_bytes;
1662 }
1663
1664 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1665 .attr = { .ca_owner = THIS_MODULE,
1666 .ca_name = "info",
1667 .ca_mode = S_IRUGO },
1668 .show = target_core_show_dev_info,
1669 .store = NULL,
1670 };
1671
1672 static ssize_t target_core_store_dev_control(
1673 void *p,
1674 const char *page,
1675 size_t count)
1676 {
1677 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1678 struct se_hba *hba = se_dev->se_dev_hba;
1679 struct se_subsystem_api *t = hba->transport;
1680
1681 if (!se_dev->se_dev_su_ptr) {
1682 pr_err("Unable to locate struct se_subsystem_dev>se"
1683 "_dev_su_ptr\n");
1684 return -EINVAL;
1685 }
1686
1687 return t->set_configfs_dev_params(hba, se_dev, page, count);
1688 }
1689
1690 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1691 .attr = { .ca_owner = THIS_MODULE,
1692 .ca_name = "control",
1693 .ca_mode = S_IWUSR },
1694 .show = NULL,
1695 .store = target_core_store_dev_control,
1696 };
1697
1698 static ssize_t target_core_show_dev_alias(void *p, char *page)
1699 {
1700 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1701
1702 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1703 return 0;
1704
1705 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1706 }
1707
1708 static ssize_t target_core_store_dev_alias(
1709 void *p,
1710 const char *page,
1711 size_t count)
1712 {
1713 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1714 struct se_hba *hba = se_dev->se_dev_hba;
1715 ssize_t read_bytes;
1716
1717 if (count > (SE_DEV_ALIAS_LEN-1)) {
1718 pr_err("alias count: %d exceeds"
1719 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1720 SE_DEV_ALIAS_LEN-1);
1721 return -EINVAL;
1722 }
1723
1724 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1725 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1726 "%s", page);
1727
1728 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1729 config_item_name(&hba->hba_group.cg_item),
1730 config_item_name(&se_dev->se_dev_group.cg_item),
1731 se_dev->se_dev_alias);
1732
1733 return read_bytes;
1734 }
1735
1736 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1737 .attr = { .ca_owner = THIS_MODULE,
1738 .ca_name = "alias",
1739 .ca_mode = S_IRUGO | S_IWUSR },
1740 .show = target_core_show_dev_alias,
1741 .store = target_core_store_dev_alias,
1742 };
1743
1744 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1745 {
1746 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1747
1748 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1749 return 0;
1750
1751 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1752 }
1753
1754 static ssize_t target_core_store_dev_udev_path(
1755 void *p,
1756 const char *page,
1757 size_t count)
1758 {
1759 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1760 struct se_hba *hba = se_dev->se_dev_hba;
1761 ssize_t read_bytes;
1762
1763 if (count > (SE_UDEV_PATH_LEN-1)) {
1764 pr_err("udev_path count: %d exceeds"
1765 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1766 SE_UDEV_PATH_LEN-1);
1767 return -EINVAL;
1768 }
1769
1770 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1771 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1772 "%s", page);
1773
1774 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1775 config_item_name(&hba->hba_group.cg_item),
1776 config_item_name(&se_dev->se_dev_group.cg_item),
1777 se_dev->se_dev_udev_path);
1778
1779 return read_bytes;
1780 }
1781
1782 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1783 .attr = { .ca_owner = THIS_MODULE,
1784 .ca_name = "udev_path",
1785 .ca_mode = S_IRUGO | S_IWUSR },
1786 .show = target_core_show_dev_udev_path,
1787 .store = target_core_store_dev_udev_path,
1788 };
1789
1790 static ssize_t target_core_store_dev_enable(
1791 void *p,
1792 const char *page,
1793 size_t count)
1794 {
1795 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1796 struct se_device *dev;
1797 struct se_hba *hba = se_dev->se_dev_hba;
1798 struct se_subsystem_api *t = hba->transport;
1799 char *ptr;
1800
1801 ptr = strstr(page, "1");
1802 if (!ptr) {
1803 pr_err("For dev_enable ops, only valid value"
1804 " is \"1\"\n");
1805 return -EINVAL;
1806 }
1807 if (se_dev->se_dev_ptr) {
1808 pr_err("se_dev->se_dev_ptr already set for storage"
1809 " object\n");
1810 return -EEXIST;
1811 }
1812
1813 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1814 return -EINVAL;
1815
1816 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1817 if (IS_ERR(dev))
1818 return PTR_ERR(dev);
1819 else if (!dev)
1820 return -EINVAL;
1821
1822 se_dev->se_dev_ptr = dev;
1823 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1824 " %p\n", se_dev->se_dev_ptr);
1825
1826 return count;
1827 }
1828
1829 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1830 .attr = { .ca_owner = THIS_MODULE,
1831 .ca_name = "enable",
1832 .ca_mode = S_IWUSR },
1833 .show = NULL,
1834 .store = target_core_store_dev_enable,
1835 };
1836
1837 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1838 {
1839 struct se_device *dev;
1840 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1841 struct config_item *lu_ci;
1842 struct t10_alua_lu_gp *lu_gp;
1843 struct t10_alua_lu_gp_member *lu_gp_mem;
1844 ssize_t len = 0;
1845
1846 dev = su_dev->se_dev_ptr;
1847 if (!dev)
1848 return -ENODEV;
1849
1850 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1851 return len;
1852
1853 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1854 if (!lu_gp_mem) {
1855 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1856 " pointer\n");
1857 return -EINVAL;
1858 }
1859
1860 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1861 lu_gp = lu_gp_mem->lu_gp;
1862 if (lu_gp) {
1863 lu_ci = &lu_gp->lu_gp_group.cg_item;
1864 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1865 config_item_name(lu_ci), lu_gp->lu_gp_id);
1866 }
1867 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1868
1869 return len;
1870 }
1871
1872 static ssize_t target_core_store_alua_lu_gp(
1873 void *p,
1874 const char *page,
1875 size_t count)
1876 {
1877 struct se_device *dev;
1878 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1879 struct se_hba *hba = su_dev->se_dev_hba;
1880 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1881 struct t10_alua_lu_gp_member *lu_gp_mem;
1882 unsigned char buf[LU_GROUP_NAME_BUF];
1883 int move = 0;
1884
1885 dev = su_dev->se_dev_ptr;
1886 if (!dev)
1887 return -ENODEV;
1888
1889 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1890 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1891 config_item_name(&hba->hba_group.cg_item),
1892 config_item_name(&su_dev->se_dev_group.cg_item));
1893 return -EINVAL;
1894 }
1895 if (count > LU_GROUP_NAME_BUF) {
1896 pr_err("ALUA LU Group Alias too large!\n");
1897 return -EINVAL;
1898 }
1899 memset(buf, 0, LU_GROUP_NAME_BUF);
1900 memcpy(buf, page, count);
1901 /*
1902 * Any ALUA logical unit alias besides "NULL" means we will be
1903 * making a new group association.
1904 */
1905 if (strcmp(strstrip(buf), "NULL")) {
1906 /*
1907 * core_alua_get_lu_gp_by_name() will increment reference to
1908 * struct t10_alua_lu_gp. This reference is released with
1909 * core_alua_get_lu_gp_by_name below().
1910 */
1911 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1912 if (!lu_gp_new)
1913 return -ENODEV;
1914 }
1915 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1916 if (!lu_gp_mem) {
1917 if (lu_gp_new)
1918 core_alua_put_lu_gp_from_name(lu_gp_new);
1919 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1920 " pointer\n");
1921 return -EINVAL;
1922 }
1923
1924 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1925 lu_gp = lu_gp_mem->lu_gp;
1926 if (lu_gp) {
1927 /*
1928 * Clearing an existing lu_gp association, and replacing
1929 * with NULL
1930 */
1931 if (!lu_gp_new) {
1932 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1933 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1934 " %hu\n",
1935 config_item_name(&hba->hba_group.cg_item),
1936 config_item_name(&su_dev->se_dev_group.cg_item),
1937 config_item_name(&lu_gp->lu_gp_group.cg_item),
1938 lu_gp->lu_gp_id);
1939
1940 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1941 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1942
1943 return count;
1944 }
1945 /*
1946 * Removing existing association of lu_gp_mem with lu_gp
1947 */
1948 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1949 move = 1;
1950 }
1951 /*
1952 * Associate lu_gp_mem with lu_gp_new.
1953 */
1954 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1955 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1956
1957 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1958 " core/alua/lu_gps/%s, ID: %hu\n",
1959 (move) ? "Moving" : "Adding",
1960 config_item_name(&hba->hba_group.cg_item),
1961 config_item_name(&su_dev->se_dev_group.cg_item),
1962 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1963 lu_gp_new->lu_gp_id);
1964
1965 core_alua_put_lu_gp_from_name(lu_gp_new);
1966 return count;
1967 }
1968
1969 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1970 .attr = { .ca_owner = THIS_MODULE,
1971 .ca_name = "alua_lu_gp",
1972 .ca_mode = S_IRUGO | S_IWUSR },
1973 .show = target_core_show_alua_lu_gp,
1974 .store = target_core_store_alua_lu_gp,
1975 };
1976
1977 static struct configfs_attribute *lio_core_dev_attrs[] = {
1978 &target_core_attr_dev_info.attr,
1979 &target_core_attr_dev_control.attr,
1980 &target_core_attr_dev_alias.attr,
1981 &target_core_attr_dev_udev_path.attr,
1982 &target_core_attr_dev_enable.attr,
1983 &target_core_attr_dev_alua_lu_gp.attr,
1984 NULL,
1985 };
1986
1987 static void target_core_dev_release(struct config_item *item)
1988 {
1989 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1990 struct se_subsystem_dev, se_dev_group);
1991 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1992 struct se_subsystem_api *t = hba->transport;
1993 struct config_group *dev_cg = &se_dev->se_dev_group;
1994
1995 kfree(dev_cg->default_groups);
1996 /*
1997 * This pointer will set when the storage is enabled with:
1998 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1999 */
2000 if (se_dev->se_dev_ptr) {
2001 pr_debug("Target_Core_ConfigFS: Calling se_free_"
2002 "virtual_device() for se_dev_ptr: %p\n",
2003 se_dev->se_dev_ptr);
2004
2005 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2006 } else {
2007 /*
2008 * Release struct se_subsystem_dev->se_dev_su_ptr..
2009 */
2010 pr_debug("Target_Core_ConfigFS: Calling t->free_"
2011 "device() for se_dev_su_ptr: %p\n",
2012 se_dev->se_dev_su_ptr);
2013
2014 t->free_device(se_dev->se_dev_su_ptr);
2015 }
2016
2017 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2018 "_dev_t: %p\n", se_dev);
2019 kfree(se_dev);
2020 }
2021
2022 static ssize_t target_core_dev_show(struct config_item *item,
2023 struct configfs_attribute *attr,
2024 char *page)
2025 {
2026 struct se_subsystem_dev *se_dev = container_of(
2027 to_config_group(item), struct se_subsystem_dev,
2028 se_dev_group);
2029 struct target_core_configfs_attribute *tc_attr = container_of(
2030 attr, struct target_core_configfs_attribute, attr);
2031
2032 if (!tc_attr->show)
2033 return -EINVAL;
2034
2035 return tc_attr->show(se_dev, page);
2036 }
2037
2038 static ssize_t target_core_dev_store(struct config_item *item,
2039 struct configfs_attribute *attr,
2040 const char *page, size_t count)
2041 {
2042 struct se_subsystem_dev *se_dev = container_of(
2043 to_config_group(item), struct se_subsystem_dev,
2044 se_dev_group);
2045 struct target_core_configfs_attribute *tc_attr = container_of(
2046 attr, struct target_core_configfs_attribute, attr);
2047
2048 if (!tc_attr->store)
2049 return -EINVAL;
2050
2051 return tc_attr->store(se_dev, page, count);
2052 }
2053
2054 static struct configfs_item_operations target_core_dev_item_ops = {
2055 .release = target_core_dev_release,
2056 .show_attribute = target_core_dev_show,
2057 .store_attribute = target_core_dev_store,
2058 };
2059
2060 static struct config_item_type target_core_dev_cit = {
2061 .ct_item_ops = &target_core_dev_item_ops,
2062 .ct_attrs = lio_core_dev_attrs,
2063 .ct_owner = THIS_MODULE,
2064 };
2065
2066 /* End functions for struct config_item_type target_core_dev_cit */
2067
2068 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2069
2070 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2071 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2072 static struct target_core_alua_lu_gp_attribute \
2073 target_core_alua_lu_gp_##_name = \
2074 __CONFIGFS_EATTR(_name, _mode, \
2075 target_core_alua_lu_gp_show_attr_##_name, \
2076 target_core_alua_lu_gp_store_attr_##_name);
2077
2078 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2079 static struct target_core_alua_lu_gp_attribute \
2080 target_core_alua_lu_gp_##_name = \
2081 __CONFIGFS_EATTR_RO(_name, \
2082 target_core_alua_lu_gp_show_attr_##_name);
2083
2084 /*
2085 * lu_gp_id
2086 */
2087 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2088 struct t10_alua_lu_gp *lu_gp,
2089 char *page)
2090 {
2091 if (!lu_gp->lu_gp_valid_id)
2092 return 0;
2093
2094 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2095 }
2096
2097 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2098 struct t10_alua_lu_gp *lu_gp,
2099 const char *page,
2100 size_t count)
2101 {
2102 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2103 unsigned long lu_gp_id;
2104 int ret;
2105
2106 ret = strict_strtoul(page, 0, &lu_gp_id);
2107 if (ret < 0) {
2108 pr_err("strict_strtoul() returned %d for"
2109 " lu_gp_id\n", ret);
2110 return -EINVAL;
2111 }
2112 if (lu_gp_id > 0x0000ffff) {
2113 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2114 " 0x0000ffff\n", lu_gp_id);
2115 return -EINVAL;
2116 }
2117
2118 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2119 if (ret < 0)
2120 return -EINVAL;
2121
2122 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2123 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2124 config_item_name(&alua_lu_gp_cg->cg_item),
2125 lu_gp->lu_gp_id);
2126
2127 return count;
2128 }
2129
2130 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2131
2132 /*
2133 * members
2134 */
2135 static ssize_t target_core_alua_lu_gp_show_attr_members(
2136 struct t10_alua_lu_gp *lu_gp,
2137 char *page)
2138 {
2139 struct se_device *dev;
2140 struct se_hba *hba;
2141 struct se_subsystem_dev *su_dev;
2142 struct t10_alua_lu_gp_member *lu_gp_mem;
2143 ssize_t len = 0, cur_len;
2144 unsigned char buf[LU_GROUP_NAME_BUF];
2145
2146 memset(buf, 0, LU_GROUP_NAME_BUF);
2147
2148 spin_lock(&lu_gp->lu_gp_lock);
2149 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2150 dev = lu_gp_mem->lu_gp_mem_dev;
2151 su_dev = dev->se_sub_dev;
2152 hba = su_dev->se_dev_hba;
2153
2154 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2155 config_item_name(&hba->hba_group.cg_item),
2156 config_item_name(&su_dev->se_dev_group.cg_item));
2157 cur_len++; /* Extra byte for NULL terminator */
2158
2159 if ((cur_len + len) > PAGE_SIZE) {
2160 pr_warn("Ran out of lu_gp_show_attr"
2161 "_members buffer\n");
2162 break;
2163 }
2164 memcpy(page+len, buf, cur_len);
2165 len += cur_len;
2166 }
2167 spin_unlock(&lu_gp->lu_gp_lock);
2168
2169 return len;
2170 }
2171
2172 SE_DEV_ALUA_LU_ATTR_RO(members);
2173
2174 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2175
2176 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2177 &target_core_alua_lu_gp_lu_gp_id.attr,
2178 &target_core_alua_lu_gp_members.attr,
2179 NULL,
2180 };
2181
2182 static void target_core_alua_lu_gp_release(struct config_item *item)
2183 {
2184 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2185 struct t10_alua_lu_gp, lu_gp_group);
2186
2187 core_alua_free_lu_gp(lu_gp);
2188 }
2189
2190 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2191 .release = target_core_alua_lu_gp_release,
2192 .show_attribute = target_core_alua_lu_gp_attr_show,
2193 .store_attribute = target_core_alua_lu_gp_attr_store,
2194 };
2195
2196 static struct config_item_type target_core_alua_lu_gp_cit = {
2197 .ct_item_ops = &target_core_alua_lu_gp_ops,
2198 .ct_attrs = target_core_alua_lu_gp_attrs,
2199 .ct_owner = THIS_MODULE,
2200 };
2201
2202 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2203
2204 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2205
2206 static struct config_group *target_core_alua_create_lu_gp(
2207 struct config_group *group,
2208 const char *name)
2209 {
2210 struct t10_alua_lu_gp *lu_gp;
2211 struct config_group *alua_lu_gp_cg = NULL;
2212 struct config_item *alua_lu_gp_ci = NULL;
2213
2214 lu_gp = core_alua_allocate_lu_gp(name, 0);
2215 if (IS_ERR(lu_gp))
2216 return NULL;
2217
2218 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2219 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2220
2221 config_group_init_type_name(alua_lu_gp_cg, name,
2222 &target_core_alua_lu_gp_cit);
2223
2224 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2225 " Group: core/alua/lu_gps/%s\n",
2226 config_item_name(alua_lu_gp_ci));
2227
2228 return alua_lu_gp_cg;
2229
2230 }
2231
2232 static void target_core_alua_drop_lu_gp(
2233 struct config_group *group,
2234 struct config_item *item)
2235 {
2236 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2237 struct t10_alua_lu_gp, lu_gp_group);
2238
2239 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2240 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2241 config_item_name(item), lu_gp->lu_gp_id);
2242 /*
2243 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2244 * -> target_core_alua_lu_gp_release()
2245 */
2246 config_item_put(item);
2247 }
2248
2249 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2250 .make_group = &target_core_alua_create_lu_gp,
2251 .drop_item = &target_core_alua_drop_lu_gp,
2252 };
2253
2254 static struct config_item_type target_core_alua_lu_gps_cit = {
2255 .ct_item_ops = NULL,
2256 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2257 .ct_owner = THIS_MODULE,
2258 };
2259
2260 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2261
2262 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2263
2264 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2265 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2266 static struct target_core_alua_tg_pt_gp_attribute \
2267 target_core_alua_tg_pt_gp_##_name = \
2268 __CONFIGFS_EATTR(_name, _mode, \
2269 target_core_alua_tg_pt_gp_show_attr_##_name, \
2270 target_core_alua_tg_pt_gp_store_attr_##_name);
2271
2272 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2273 static struct target_core_alua_tg_pt_gp_attribute \
2274 target_core_alua_tg_pt_gp_##_name = \
2275 __CONFIGFS_EATTR_RO(_name, \
2276 target_core_alua_tg_pt_gp_show_attr_##_name);
2277
2278 /*
2279 * alua_access_state
2280 */
2281 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2282 struct t10_alua_tg_pt_gp *tg_pt_gp,
2283 char *page)
2284 {
2285 return sprintf(page, "%d\n",
2286 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2287 }
2288
2289 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2290 struct t10_alua_tg_pt_gp *tg_pt_gp,
2291 const char *page,
2292 size_t count)
2293 {
2294 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2295 unsigned long tmp;
2296 int new_state, ret;
2297
2298 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2299 pr_err("Unable to do implict ALUA on non valid"
2300 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2301 return -EINVAL;
2302 }
2303
2304 ret = strict_strtoul(page, 0, &tmp);
2305 if (ret < 0) {
2306 pr_err("Unable to extract new ALUA access state from"
2307 " %s\n", page);
2308 return -EINVAL;
2309 }
2310 new_state = (int)tmp;
2311
2312 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2313 pr_err("Unable to process implict configfs ALUA"
2314 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2315 return -EINVAL;
2316 }
2317
2318 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2319 NULL, NULL, new_state, 0);
2320 return (!ret) ? count : -EINVAL;
2321 }
2322
2323 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2324
2325 /*
2326 * alua_access_status
2327 */
2328 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2329 struct t10_alua_tg_pt_gp *tg_pt_gp,
2330 char *page)
2331 {
2332 return sprintf(page, "%s\n",
2333 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2334 }
2335
2336 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2337 struct t10_alua_tg_pt_gp *tg_pt_gp,
2338 const char *page,
2339 size_t count)
2340 {
2341 unsigned long tmp;
2342 int new_status, ret;
2343
2344 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2345 pr_err("Unable to do set ALUA access status on non"
2346 " valid tg_pt_gp ID: %hu\n",
2347 tg_pt_gp->tg_pt_gp_valid_id);
2348 return -EINVAL;
2349 }
2350
2351 ret = strict_strtoul(page, 0, &tmp);
2352 if (ret < 0) {
2353 pr_err("Unable to extract new ALUA access status"
2354 " from %s\n", page);
2355 return -EINVAL;
2356 }
2357 new_status = (int)tmp;
2358
2359 if ((new_status != ALUA_STATUS_NONE) &&
2360 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2361 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2362 pr_err("Illegal ALUA access status: 0x%02x\n",
2363 new_status);
2364 return -EINVAL;
2365 }
2366
2367 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2368 return count;
2369 }
2370
2371 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2372
2373 /*
2374 * alua_access_type
2375 */
2376 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2377 struct t10_alua_tg_pt_gp *tg_pt_gp,
2378 char *page)
2379 {
2380 return core_alua_show_access_type(tg_pt_gp, page);
2381 }
2382
2383 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2384 struct t10_alua_tg_pt_gp *tg_pt_gp,
2385 const char *page,
2386 size_t count)
2387 {
2388 return core_alua_store_access_type(tg_pt_gp, page, count);
2389 }
2390
2391 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2392
2393 /*
2394 * alua_write_metadata
2395 */
2396 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2397 struct t10_alua_tg_pt_gp *tg_pt_gp,
2398 char *page)
2399 {
2400 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2401 }
2402
2403 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2404 struct t10_alua_tg_pt_gp *tg_pt_gp,
2405 const char *page,
2406 size_t count)
2407 {
2408 unsigned long tmp;
2409 int ret;
2410
2411 ret = strict_strtoul(page, 0, &tmp);
2412 if (ret < 0) {
2413 pr_err("Unable to extract alua_write_metadata\n");
2414 return -EINVAL;
2415 }
2416
2417 if ((tmp != 0) && (tmp != 1)) {
2418 pr_err("Illegal value for alua_write_metadata:"
2419 " %lu\n", tmp);
2420 return -EINVAL;
2421 }
2422 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2423
2424 return count;
2425 }
2426
2427 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2428
2429
2430
2431 /*
2432 * nonop_delay_msecs
2433 */
2434 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2435 struct t10_alua_tg_pt_gp *tg_pt_gp,
2436 char *page)
2437 {
2438 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2439
2440 }
2441
2442 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2443 struct t10_alua_tg_pt_gp *tg_pt_gp,
2444 const char *page,
2445 size_t count)
2446 {
2447 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2448 }
2449
2450 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2451
2452 /*
2453 * trans_delay_msecs
2454 */
2455 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2456 struct t10_alua_tg_pt_gp *tg_pt_gp,
2457 char *page)
2458 {
2459 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2460 }
2461
2462 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2463 struct t10_alua_tg_pt_gp *tg_pt_gp,
2464 const char *page,
2465 size_t count)
2466 {
2467 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2468 }
2469
2470 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2471
2472 /*
2473 * preferred
2474 */
2475
2476 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2477 struct t10_alua_tg_pt_gp *tg_pt_gp,
2478 char *page)
2479 {
2480 return core_alua_show_preferred_bit(tg_pt_gp, page);
2481 }
2482
2483 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2484 struct t10_alua_tg_pt_gp *tg_pt_gp,
2485 const char *page,
2486 size_t count)
2487 {
2488 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2489 }
2490
2491 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2492
2493 /*
2494 * tg_pt_gp_id
2495 */
2496 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2497 struct t10_alua_tg_pt_gp *tg_pt_gp,
2498 char *page)
2499 {
2500 if (!tg_pt_gp->tg_pt_gp_valid_id)
2501 return 0;
2502
2503 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2504 }
2505
2506 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2507 struct t10_alua_tg_pt_gp *tg_pt_gp,
2508 const char *page,
2509 size_t count)
2510 {
2511 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2512 unsigned long tg_pt_gp_id;
2513 int ret;
2514
2515 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2516 if (ret < 0) {
2517 pr_err("strict_strtoul() returned %d for"
2518 " tg_pt_gp_id\n", ret);
2519 return -EINVAL;
2520 }
2521 if (tg_pt_gp_id > 0x0000ffff) {
2522 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2523 " 0x0000ffff\n", tg_pt_gp_id);
2524 return -EINVAL;
2525 }
2526
2527 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2528 if (ret < 0)
2529 return -EINVAL;
2530
2531 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2532 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2533 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2534 tg_pt_gp->tg_pt_gp_id);
2535
2536 return count;
2537 }
2538
2539 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2540
2541 /*
2542 * members
2543 */
2544 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2545 struct t10_alua_tg_pt_gp *tg_pt_gp,
2546 char *page)
2547 {
2548 struct se_port *port;
2549 struct se_portal_group *tpg;
2550 struct se_lun *lun;
2551 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2552 ssize_t len = 0, cur_len;
2553 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2554
2555 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2556
2557 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2558 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2559 tg_pt_gp_mem_list) {
2560 port = tg_pt_gp_mem->tg_pt;
2561 tpg = port->sep_tpg;
2562 lun = port->sep_lun;
2563
2564 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2565 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2566 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2567 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2568 config_item_name(&lun->lun_group.cg_item));
2569 cur_len++; /* Extra byte for NULL terminator */
2570
2571 if ((cur_len + len) > PAGE_SIZE) {
2572 pr_warn("Ran out of lu_gp_show_attr"
2573 "_members buffer\n");
2574 break;
2575 }
2576 memcpy(page+len, buf, cur_len);
2577 len += cur_len;
2578 }
2579 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2580
2581 return len;
2582 }
2583
2584 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2585
2586 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2587 tg_pt_gp_group);
2588
2589 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2590 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2591 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2592 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2593 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2594 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2595 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2596 &target_core_alua_tg_pt_gp_preferred.attr,
2597 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2598 &target_core_alua_tg_pt_gp_members.attr,
2599 NULL,
2600 };
2601
2602 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2603 {
2604 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2605 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2606
2607 core_alua_free_tg_pt_gp(tg_pt_gp);
2608 }
2609
2610 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2611 .release = target_core_alua_tg_pt_gp_release,
2612 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2613 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2614 };
2615
2616 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2617 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2618 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2619 .ct_owner = THIS_MODULE,
2620 };
2621
2622 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2623
2624 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2625
2626 static struct config_group *target_core_alua_create_tg_pt_gp(
2627 struct config_group *group,
2628 const char *name)
2629 {
2630 struct t10_alua *alua = container_of(group, struct t10_alua,
2631 alua_tg_pt_gps_group);
2632 struct t10_alua_tg_pt_gp *tg_pt_gp;
2633 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2634 struct config_group *alua_tg_pt_gp_cg = NULL;
2635 struct config_item *alua_tg_pt_gp_ci = NULL;
2636
2637 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2638 if (!tg_pt_gp)
2639 return NULL;
2640
2641 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2642 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2643
2644 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2645 &target_core_alua_tg_pt_gp_cit);
2646
2647 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2648 " Group: alua/tg_pt_gps/%s\n",
2649 config_item_name(alua_tg_pt_gp_ci));
2650
2651 return alua_tg_pt_gp_cg;
2652 }
2653
2654 static void target_core_alua_drop_tg_pt_gp(
2655 struct config_group *group,
2656 struct config_item *item)
2657 {
2658 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2659 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2660
2661 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2662 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2663 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2664 /*
2665 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2666 * -> target_core_alua_tg_pt_gp_release().
2667 */
2668 config_item_put(item);
2669 }
2670
2671 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2672 .make_group = &target_core_alua_create_tg_pt_gp,
2673 .drop_item = &target_core_alua_drop_tg_pt_gp,
2674 };
2675
2676 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2677 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2678 .ct_owner = THIS_MODULE,
2679 };
2680
2681 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2682
2683 /* Start functions for struct config_item_type target_core_alua_cit */
2684
2685 /*
2686 * target_core_alua_cit is a ConfigFS group that lives under
2687 * /sys/kernel/config/target/core/alua. There are default groups
2688 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2689 * target_core_alua_cit in target_core_init_configfs() below.
2690 */
2691 static struct config_item_type target_core_alua_cit = {
2692 .ct_item_ops = NULL,
2693 .ct_attrs = NULL,
2694 .ct_owner = THIS_MODULE,
2695 };
2696
2697 /* End functions for struct config_item_type target_core_alua_cit */
2698
2699 /* Start functions for struct config_item_type target_core_stat_cit */
2700
2701 static struct config_group *target_core_stat_mkdir(
2702 struct config_group *group,
2703 const char *name)
2704 {
2705 return ERR_PTR(-ENOSYS);
2706 }
2707
2708 static void target_core_stat_rmdir(
2709 struct config_group *group,
2710 struct config_item *item)
2711 {
2712 return;
2713 }
2714
2715 static struct configfs_group_operations target_core_stat_group_ops = {
2716 .make_group = &target_core_stat_mkdir,
2717 .drop_item = &target_core_stat_rmdir,
2718 };
2719
2720 static struct config_item_type target_core_stat_cit = {
2721 .ct_group_ops = &target_core_stat_group_ops,
2722 .ct_owner = THIS_MODULE,
2723 };
2724
2725 /* End functions for struct config_item_type target_core_stat_cit */
2726
2727 /* Start functions for struct config_item_type target_core_hba_cit */
2728
2729 static struct config_group *target_core_make_subdev(
2730 struct config_group *group,
2731 const char *name)
2732 {
2733 struct t10_alua_tg_pt_gp *tg_pt_gp;
2734 struct se_subsystem_dev *se_dev;
2735 struct se_subsystem_api *t;
2736 struct config_item *hba_ci = &group->cg_item;
2737 struct se_hba *hba = item_to_hba(hba_ci);
2738 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2739 struct config_group *dev_stat_grp = NULL;
2740 int errno = -ENOMEM, ret;
2741
2742 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2743 if (ret)
2744 return ERR_PTR(ret);
2745 /*
2746 * Locate the struct se_subsystem_api from parent's struct se_hba.
2747 */
2748 t = hba->transport;
2749
2750 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2751 if (!se_dev) {
2752 pr_err("Unable to allocate memory for"
2753 " struct se_subsystem_dev\n");
2754 goto unlock;
2755 }
2756 INIT_LIST_HEAD(&se_dev->se_dev_node);
2757 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2758 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2759 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2760 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2761 spin_lock_init(&se_dev->t10_pr.registration_lock);
2762 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2763 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2764 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2765 spin_lock_init(&se_dev->se_dev_lock);
2766 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2767 se_dev->t10_wwn.t10_sub_dev = se_dev;
2768 se_dev->t10_alua.t10_sub_dev = se_dev;
2769 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2770
2771 se_dev->se_dev_hba = hba;
2772 dev_cg = &se_dev->se_dev_group;
2773
2774 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2775 GFP_KERNEL);
2776 if (!dev_cg->default_groups)
2777 goto out;
2778 /*
2779 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2780 * for ->allocate_virtdevice()
2781 *
2782 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2783 * has been called successfully in the next level up in the
2784 * configfs tree for device object's struct config_group.
2785 */
2786 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2787 if (!se_dev->se_dev_su_ptr) {
2788 pr_err("Unable to locate subsystem dependent pointer"
2789 " from allocate_virtdevice()\n");
2790 goto out;
2791 }
2792 spin_lock(&se_device_lock);
2793 list_add_tail(&se_dev->se_dev_node, &se_dev_list);
2794 spin_unlock(&se_device_lock);
2795
2796 config_group_init_type_name(&se_dev->se_dev_group, name,
2797 &target_core_dev_cit);
2798 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2799 &target_core_dev_attrib_cit);
2800 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2801 &target_core_dev_pr_cit);
2802 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2803 &target_core_dev_wwn_cit);
2804 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2805 "alua", &target_core_alua_tg_pt_gps_cit);
2806 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2807 "statistics", &target_core_stat_cit);
2808
2809 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2810 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2811 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2812 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2813 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2814 dev_cg->default_groups[5] = NULL;
2815 /*
2816 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2817 */
2818 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2819 if (!tg_pt_gp)
2820 goto out;
2821
2822 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2823 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2824 GFP_KERNEL);
2825 if (!tg_pt_gp_cg->default_groups) {
2826 pr_err("Unable to allocate tg_pt_gp_cg->"
2827 "default_groups\n");
2828 goto out;
2829 }
2830
2831 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2832 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2833 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2834 tg_pt_gp_cg->default_groups[1] = NULL;
2835 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2836 /*
2837 * Add core/$HBA/$DEV/statistics/ default groups
2838 */
2839 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2840 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2841 GFP_KERNEL);
2842 if (!dev_stat_grp->default_groups) {
2843 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2844 goto out;
2845 }
2846 target_stat_setup_dev_default_groups(se_dev);
2847
2848 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2849 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2850
2851 mutex_unlock(&hba->hba_access_mutex);
2852 return &se_dev->se_dev_group;
2853 out:
2854 if (se_dev->t10_alua.default_tg_pt_gp) {
2855 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2856 se_dev->t10_alua.default_tg_pt_gp = NULL;
2857 }
2858 if (dev_stat_grp)
2859 kfree(dev_stat_grp->default_groups);
2860 if (tg_pt_gp_cg)
2861 kfree(tg_pt_gp_cg->default_groups);
2862 if (dev_cg)
2863 kfree(dev_cg->default_groups);
2864 if (se_dev->se_dev_su_ptr)
2865 t->free_device(se_dev->se_dev_su_ptr);
2866 kfree(se_dev);
2867 unlock:
2868 mutex_unlock(&hba->hba_access_mutex);
2869 return ERR_PTR(errno);
2870 }
2871
2872 static void target_core_drop_subdev(
2873 struct config_group *group,
2874 struct config_item *item)
2875 {
2876 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2877 struct se_subsystem_dev, se_dev_group);
2878 struct se_hba *hba;
2879 struct se_subsystem_api *t;
2880 struct config_item *df_item;
2881 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2882 int i;
2883
2884 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2885
2886 mutex_lock(&hba->hba_access_mutex);
2887 t = hba->transport;
2888
2889 spin_lock(&se_device_lock);
2890 list_del(&se_dev->se_dev_node);
2891 spin_unlock(&se_device_lock);
2892
2893 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2894 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2895 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2896 dev_stat_grp->default_groups[i] = NULL;
2897 config_item_put(df_item);
2898 }
2899 kfree(dev_stat_grp->default_groups);
2900
2901 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2902 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2903 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2904 tg_pt_gp_cg->default_groups[i] = NULL;
2905 config_item_put(df_item);
2906 }
2907 kfree(tg_pt_gp_cg->default_groups);
2908 /*
2909 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2910 * directly from target_core_alua_tg_pt_gp_release().
2911 */
2912 se_dev->t10_alua.default_tg_pt_gp = NULL;
2913
2914 dev_cg = &se_dev->se_dev_group;
2915 for (i = 0; dev_cg->default_groups[i]; i++) {
2916 df_item = &dev_cg->default_groups[i]->cg_item;
2917 dev_cg->default_groups[i] = NULL;
2918 config_item_put(df_item);
2919 }
2920 /*
2921 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2922 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2923 */
2924 config_item_put(item);
2925 mutex_unlock(&hba->hba_access_mutex);
2926 }
2927
2928 static struct configfs_group_operations target_core_hba_group_ops = {
2929 .make_group = target_core_make_subdev,
2930 .drop_item = target_core_drop_subdev,
2931 };
2932
2933 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2934 #define SE_HBA_ATTR(_name, _mode) \
2935 static struct target_core_hba_attribute \
2936 target_core_hba_##_name = \
2937 __CONFIGFS_EATTR(_name, _mode, \
2938 target_core_hba_show_attr_##_name, \
2939 target_core_hba_store_attr_##_name);
2940
2941 #define SE_HBA_ATTR_RO(_name) \
2942 static struct target_core_hba_attribute \
2943 target_core_hba_##_name = \
2944 __CONFIGFS_EATTR_RO(_name, \
2945 target_core_hba_show_attr_##_name);
2946
2947 static ssize_t target_core_hba_show_attr_hba_info(
2948 struct se_hba *hba,
2949 char *page)
2950 {
2951 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2952 hba->hba_id, hba->transport->name,
2953 TARGET_CORE_CONFIGFS_VERSION);
2954 }
2955
2956 SE_HBA_ATTR_RO(hba_info);
2957
2958 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2959 char *page)
2960 {
2961 int hba_mode = 0;
2962
2963 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2964 hba_mode = 1;
2965
2966 return sprintf(page, "%d\n", hba_mode);
2967 }
2968
2969 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2970 const char *page, size_t count)
2971 {
2972 struct se_subsystem_api *transport = hba->transport;
2973 unsigned long mode_flag;
2974 int ret;
2975
2976 if (transport->pmode_enable_hba == NULL)
2977 return -EINVAL;
2978
2979 ret = strict_strtoul(page, 0, &mode_flag);
2980 if (ret < 0) {
2981 pr_err("Unable to extract hba mode flag: %d\n", ret);
2982 return -EINVAL;
2983 }
2984
2985 spin_lock(&hba->device_lock);
2986 if (!list_empty(&hba->hba_dev_list)) {
2987 pr_err("Unable to set hba_mode with active devices\n");
2988 spin_unlock(&hba->device_lock);
2989 return -EINVAL;
2990 }
2991 spin_unlock(&hba->device_lock);
2992
2993 ret = transport->pmode_enable_hba(hba, mode_flag);
2994 if (ret < 0)
2995 return -EINVAL;
2996 if (ret > 0)
2997 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2998 else if (ret == 0)
2999 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3000
3001 return count;
3002 }
3003
3004 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3005
3006 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3007
3008 static void target_core_hba_release(struct config_item *item)
3009 {
3010 struct se_hba *hba = container_of(to_config_group(item),
3011 struct se_hba, hba_group);
3012 core_delete_hba(hba);
3013 }
3014
3015 static struct configfs_attribute *target_core_hba_attrs[] = {
3016 &target_core_hba_hba_info.attr,
3017 &target_core_hba_hba_mode.attr,
3018 NULL,
3019 };
3020
3021 static struct configfs_item_operations target_core_hba_item_ops = {
3022 .release = target_core_hba_release,
3023 .show_attribute = target_core_hba_attr_show,
3024 .store_attribute = target_core_hba_attr_store,
3025 };
3026
3027 static struct config_item_type target_core_hba_cit = {
3028 .ct_item_ops = &target_core_hba_item_ops,
3029 .ct_group_ops = &target_core_hba_group_ops,
3030 .ct_attrs = target_core_hba_attrs,
3031 .ct_owner = THIS_MODULE,
3032 };
3033
3034 static struct config_group *target_core_call_addhbatotarget(
3035 struct config_group *group,
3036 const char *name)
3037 {
3038 char *se_plugin_str, *str, *str2;
3039 struct se_hba *hba;
3040 char buf[TARGET_CORE_NAME_MAX_LEN];
3041 unsigned long plugin_dep_id = 0;
3042 int ret;
3043
3044 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3045 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3046 pr_err("Passed *name strlen(): %d exceeds"
3047 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3048 TARGET_CORE_NAME_MAX_LEN);
3049 return ERR_PTR(-ENAMETOOLONG);
3050 }
3051 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3052
3053 str = strstr(buf, "_");
3054 if (!str) {
3055 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3056 return ERR_PTR(-EINVAL);
3057 }
3058 se_plugin_str = buf;
3059 /*
3060 * Special case for subsystem plugins that have "_" in their names.
3061 * Namely rd_direct and rd_mcp..
3062 */
3063 str2 = strstr(str+1, "_");
3064 if (str2) {
3065 *str2 = '\0'; /* Terminate for *se_plugin_str */
3066 str2++; /* Skip to start of plugin dependent ID */
3067 str = str2;
3068 } else {
3069 *str = '\0'; /* Terminate for *se_plugin_str */
3070 str++; /* Skip to start of plugin dependent ID */
3071 }
3072
3073 ret = strict_strtoul(str, 0, &plugin_dep_id);
3074 if (ret < 0) {
3075 pr_err("strict_strtoul() returned %d for"
3076 " plugin_dep_id\n", ret);
3077 return ERR_PTR(-EINVAL);
3078 }
3079 /*
3080 * Load up TCM subsystem plugins if they have not already been loaded.
3081 */
3082 if (transport_subsystem_check_init() < 0)
3083 return ERR_PTR(-EINVAL);
3084
3085 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3086 if (IS_ERR(hba))
3087 return ERR_CAST(hba);
3088
3089 config_group_init_type_name(&hba->hba_group, name,
3090 &target_core_hba_cit);
3091
3092 return &hba->hba_group;
3093 }
3094
3095 static void target_core_call_delhbafromtarget(
3096 struct config_group *group,
3097 struct config_item *item)
3098 {
3099 /*
3100 * core_delete_hba() is called from target_core_hba_item_ops->release()
3101 * -> target_core_hba_release()
3102 */
3103 config_item_put(item);
3104 }
3105
3106 static struct configfs_group_operations target_core_group_ops = {
3107 .make_group = target_core_call_addhbatotarget,
3108 .drop_item = target_core_call_delhbafromtarget,
3109 };
3110
3111 static struct config_item_type target_core_cit = {
3112 .ct_item_ops = NULL,
3113 .ct_group_ops = &target_core_group_ops,
3114 .ct_attrs = NULL,
3115 .ct_owner = THIS_MODULE,
3116 };
3117
3118 /* Stop functions for struct config_item_type target_core_hba_cit */
3119
3120 static int __init target_core_init_configfs(void)
3121 {
3122 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3123 struct config_group *lu_gp_cg = NULL;
3124 struct configfs_subsystem *subsys;
3125 struct t10_alua_lu_gp *lu_gp;
3126 int ret;
3127
3128 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3129 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3130 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3131
3132 subsys = target_core_subsystem[0];
3133 config_group_init(&subsys->su_group);
3134 mutex_init(&subsys->su_mutex);
3135
3136 INIT_LIST_HEAD(&g_tf_list);
3137 mutex_init(&g_tf_lock);
3138 ret = init_se_kmem_caches();
3139 if (ret < 0)
3140 return ret;
3141 /*
3142 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3143 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3144 */
3145 target_cg = &subsys->su_group;
3146 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3147 GFP_KERNEL);
3148 if (!target_cg->default_groups) {
3149 pr_err("Unable to allocate target_cg->default_groups\n");
3150 goto out_global;
3151 }
3152
3153 config_group_init_type_name(&target_core_hbagroup,
3154 "core", &target_core_cit);
3155 target_cg->default_groups[0] = &target_core_hbagroup;
3156 target_cg->default_groups[1] = NULL;
3157 /*
3158 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3159 */
3160 hba_cg = &target_core_hbagroup;
3161 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3162 GFP_KERNEL);
3163 if (!hba_cg->default_groups) {
3164 pr_err("Unable to allocate hba_cg->default_groups\n");
3165 goto out_global;
3166 }
3167 config_group_init_type_name(&alua_group,
3168 "alua", &target_core_alua_cit);
3169 hba_cg->default_groups[0] = &alua_group;
3170 hba_cg->default_groups[1] = NULL;
3171 /*
3172 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3173 * groups under /sys/kernel/config/target/core/alua/
3174 */
3175 alua_cg = &alua_group;
3176 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3177 GFP_KERNEL);
3178 if (!alua_cg->default_groups) {
3179 pr_err("Unable to allocate alua_cg->default_groups\n");
3180 goto out_global;
3181 }
3182
3183 config_group_init_type_name(&alua_lu_gps_group,
3184 "lu_gps", &target_core_alua_lu_gps_cit);
3185 alua_cg->default_groups[0] = &alua_lu_gps_group;
3186 alua_cg->default_groups[1] = NULL;
3187 /*
3188 * Add core/alua/lu_gps/default_lu_gp
3189 */
3190 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3191 if (IS_ERR(lu_gp))
3192 goto out_global;
3193
3194 lu_gp_cg = &alua_lu_gps_group;
3195 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3196 GFP_KERNEL);
3197 if (!lu_gp_cg->default_groups) {
3198 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3199 goto out_global;
3200 }
3201
3202 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3203 &target_core_alua_lu_gp_cit);
3204 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3205 lu_gp_cg->default_groups[1] = NULL;
3206 default_lu_gp = lu_gp;
3207 /*
3208 * Register the target_core_mod subsystem with configfs.
3209 */
3210 ret = configfs_register_subsystem(subsys);
3211 if (ret < 0) {
3212 pr_err("Error %d while registering subsystem %s\n",
3213 ret, subsys->su_group.cg_item.ci_namebuf);
3214 goto out_global;
3215 }
3216 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3217 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3218 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3219 /*
3220 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3221 */
3222 ret = rd_module_init();
3223 if (ret < 0)
3224 goto out;
3225
3226 if (core_dev_setup_virtual_lun0() < 0)
3227 goto out;
3228
3229 return 0;
3230
3231 out:
3232 configfs_unregister_subsystem(subsys);
3233 core_dev_release_virtual_lun0();
3234 rd_module_exit();
3235 out_global:
3236 if (default_lu_gp) {
3237 core_alua_free_lu_gp(default_lu_gp);
3238 default_lu_gp = NULL;
3239 }
3240 if (lu_gp_cg)
3241 kfree(lu_gp_cg->default_groups);
3242 if (alua_cg)
3243 kfree(alua_cg->default_groups);
3244 if (hba_cg)
3245 kfree(hba_cg->default_groups);
3246 kfree(target_cg->default_groups);
3247 release_se_kmem_caches();
3248 return ret;
3249 }
3250
3251 static void __exit target_core_exit_configfs(void)
3252 {
3253 struct configfs_subsystem *subsys;
3254 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3255 struct config_item *item;
3256 int i;
3257
3258 subsys = target_core_subsystem[0];
3259
3260 lu_gp_cg = &alua_lu_gps_group;
3261 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3262 item = &lu_gp_cg->default_groups[i]->cg_item;
3263 lu_gp_cg->default_groups[i] = NULL;
3264 config_item_put(item);
3265 }
3266 kfree(lu_gp_cg->default_groups);
3267 lu_gp_cg->default_groups = NULL;
3268
3269 alua_cg = &alua_group;
3270 for (i = 0; alua_cg->default_groups[i]; i++) {
3271 item = &alua_cg->default_groups[i]->cg_item;
3272 alua_cg->default_groups[i] = NULL;
3273 config_item_put(item);
3274 }
3275 kfree(alua_cg->default_groups);
3276 alua_cg->default_groups = NULL;
3277
3278 hba_cg = &target_core_hbagroup;
3279 for (i = 0; hba_cg->default_groups[i]; i++) {
3280 item = &hba_cg->default_groups[i]->cg_item;
3281 hba_cg->default_groups[i] = NULL;
3282 config_item_put(item);
3283 }
3284 kfree(hba_cg->default_groups);
3285 hba_cg->default_groups = NULL;
3286 /*
3287 * We expect subsys->su_group.default_groups to be released
3288 * by configfs subsystem provider logic..
3289 */
3290 configfs_unregister_subsystem(subsys);
3291 kfree(subsys->su_group.default_groups);
3292
3293 core_alua_free_lu_gp(default_lu_gp);
3294 default_lu_gp = NULL;
3295
3296 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3297 " Infrastructure\n");
3298
3299 core_dev_release_virtual_lun0();
3300 rd_module_exit();
3301 release_se_kmem_caches();
3302 }
3303
3304 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3305 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3306 MODULE_LICENSE("GPL");
3307
3308 module_init(target_core_init_configfs);
3309 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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