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mmc: SDHI should depend on SUPERH || ARCH_SHMOBILE
[cris-mirror.git] / drivers / target / target_core_configfs.c
blobcaf8dc18ee0ae0f4a0da4d210855bdac15be3e42
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * Copyright (c) 2008-2010 Rising Tide Systems
7 * Copyright (c) 2008-2010 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 <linux/version.h>
27 #include <generated/utsrelease.h>
28 #include <linux/utsname.h>
29 #include <linux/init.h>
30 #include <linux/fs.h>
31 #include <linux/namei.h>
32 #include <linux/slab.h>
33 #include <linux/types.h>
34 #include <linux/delay.h>
35 #include <linux/unistd.h>
36 #include <linux/string.h>
37 #include <linux/parser.h>
38 #include <linux/syscalls.h>
39 #include <linux/configfs.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
54 static struct list_head g_tf_list;
55 static struct mutex g_tf_lock;
56
57 struct target_core_configfs_attribute {
58 struct configfs_attribute attr;
59 ssize_t (*show)(void *, char *);
60 ssize_t (*store)(void *, const char *, size_t);
61 };
62
63 static inline struct se_hba *
64 item_to_hba(struct config_item *item)
65 {
66 return container_of(to_config_group(item), struct se_hba, hba_group);
67 }
68
69 /*
70 * Attributes for /sys/kernel/config/target/
71 */
72 static ssize_t target_core_attr_show(struct config_item *item,
73 struct configfs_attribute *attr,
74 char *page)
75 {
76 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
77 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
78 utsname()->sysname, utsname()->machine);
79 }
80
81 static struct configfs_item_operations target_core_fabric_item_ops = {
82 .show_attribute = target_core_attr_show,
83 };
84
85 static struct configfs_attribute target_core_item_attr_version = {
86 .ca_owner = THIS_MODULE,
87 .ca_name = "version",
88 .ca_mode = S_IRUGO,
89 };
90
91 static struct target_fabric_configfs *target_core_get_fabric(
92 const char *name)
93 {
94 struct target_fabric_configfs *tf;
95
96 if (!(name))
97 return NULL;
98
99 mutex_lock(&g_tf_lock);
100 list_for_each_entry(tf, &g_tf_list, tf_list) {
101 if (!(strcmp(tf->tf_name, name))) {
102 atomic_inc(&tf->tf_access_cnt);
103 mutex_unlock(&g_tf_lock);
104 return tf;
105 }
106 }
107 mutex_unlock(&g_tf_lock);
108
109 return NULL;
110 }
111
112 /*
113 * Called from struct target_core_group_ops->make_group()
114 */
115 static struct config_group *target_core_register_fabric(
116 struct config_group *group,
117 const char *name)
118 {
119 struct target_fabric_configfs *tf;
120 int ret;
121
122 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
123 " %s\n", group, name);
124 /*
125 * Ensure that TCM subsystem plugins are loaded at this point for
126 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
127 * LUN symlinks.
128 */
129 if (transport_subsystem_check_init() < 0)
130 return ERR_PTR(-EINVAL);
131
132 /*
133 * Below are some hardcoded request_module() calls to automatically
134 * local fabric modules when the following is called:
135 *
136 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
137 *
138 * Note that this does not limit which TCM fabric module can be
139 * registered, but simply provids auto loading logic for modules with
140 * mkdir(2) system calls with known TCM fabric modules.
141 */
142 if (!(strncmp(name, "iscsi", 5))) {
143 /*
144 * Automatically load the LIO Target fabric module when the
145 * following is called:
146 *
147 * mkdir -p $CONFIGFS/target/iscsi
148 */
149 ret = request_module("iscsi_target_mod");
150 if (ret < 0) {
151 printk(KERN_ERR "request_module() failed for"
152 " iscsi_target_mod.ko: %d\n", ret);
153 return ERR_PTR(-EINVAL);
154 }
155 } else if (!(strncmp(name, "loopback", 8))) {
156 /*
157 * Automatically load the tcm_loop fabric module when the
158 * following is called:
159 *
160 * mkdir -p $CONFIGFS/target/loopback
161 */
162 ret = request_module("tcm_loop");
163 if (ret < 0) {
164 printk(KERN_ERR "request_module() failed for"
165 " tcm_loop.ko: %d\n", ret);
166 return ERR_PTR(-EINVAL);
167 }
168 }
169
170 tf = target_core_get_fabric(name);
171 if (!(tf)) {
172 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
173 name);
174 return ERR_PTR(-EINVAL);
175 }
176 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
177 " %s\n", tf->tf_name);
178 /*
179 * On a successful target_core_get_fabric() look, the returned
180 * struct target_fabric_configfs *tf will contain a usage reference.
181 */
182 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
183 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
184
185 tf->tf_group.default_groups = tf->tf_default_groups;
186 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
187 tf->tf_group.default_groups[1] = NULL;
188
189 config_group_init_type_name(&tf->tf_group, name,
190 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
191 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
192 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
193
194 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
195 " %s\n", tf->tf_group.cg_item.ci_name);
196 /*
197 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
198 */
199 tf->tf_ops.tf_subsys = tf->tf_subsys;
200 tf->tf_fabric = &tf->tf_group.cg_item;
201 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
202 " for %s\n", name);
203
204 return &tf->tf_group;
205 }
206
207 /*
208 * Called from struct target_core_group_ops->drop_item()
209 */
210 static void target_core_deregister_fabric(
211 struct config_group *group,
212 struct config_item *item)
213 {
214 struct target_fabric_configfs *tf = container_of(
215 to_config_group(item), struct target_fabric_configfs, tf_group);
216 struct config_group *tf_group;
217 struct config_item *df_item;
218 int i;
219
220 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
221 " tf list\n", config_item_name(item));
222
223 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
224 " %s\n", tf->tf_name);
225 atomic_dec(&tf->tf_access_cnt);
226
227 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
228 " tf->tf_fabric for %s\n", tf->tf_name);
229 tf->tf_fabric = NULL;
230
231 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
232 " %s\n", config_item_name(item));
233
234 tf_group = &tf->tf_group;
235 for (i = 0; tf_group->default_groups[i]; i++) {
236 df_item = &tf_group->default_groups[i]->cg_item;
237 tf_group->default_groups[i] = NULL;
238 config_item_put(df_item);
239 }
240 config_item_put(item);
241 }
242
243 static struct configfs_group_operations target_core_fabric_group_ops = {
244 .make_group = &target_core_register_fabric,
245 .drop_item = &target_core_deregister_fabric,
246 };
247
248 /*
249 * All item attributes appearing in /sys/kernel/target/ appear here.
250 */
251 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
252 &target_core_item_attr_version,
253 NULL,
254 };
255
256 /*
257 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
258 */
259 static struct config_item_type target_core_fabrics_item = {
260 .ct_item_ops = &target_core_fabric_item_ops,
261 .ct_group_ops = &target_core_fabric_group_ops,
262 .ct_attrs = target_core_fabric_item_attrs,
263 .ct_owner = THIS_MODULE,
264 };
265
266 static struct configfs_subsystem target_core_fabrics = {
267 .su_group = {
268 .cg_item = {
269 .ci_namebuf = "target",
270 .ci_type = &target_core_fabrics_item,
271 },
272 },
273 };
274
275 static struct configfs_subsystem *target_core_subsystem[] = {
276 &target_core_fabrics,
277 NULL,
278 };
279
280 /*##############################################################################
281 // Start functions called by external Target Fabrics Modules
282 //############################################################################*/
283
284 /*
285 * First function called by fabric modules to:
286 *
287 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
288 * 2) Add struct target_fabric_configfs to g_tf_list
289 * 3) Return struct target_fabric_configfs to fabric module to be passed
290 * into target_fabric_configfs_register().
291 */
292 struct target_fabric_configfs *target_fabric_configfs_init(
293 struct module *fabric_mod,
294 const char *name)
295 {
296 struct target_fabric_configfs *tf;
297
298 if (!(fabric_mod)) {
299 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
300 return NULL;
301 }
302 if (!(name)) {
303 printk(KERN_ERR "Unable to locate passed fabric name\n");
304 return NULL;
305 }
306 if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
307 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
308 "_NAME_SIZE\n", name);
309 return NULL;
310 }
311
312 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
313 if (!(tf))
314 return ERR_PTR(-ENOMEM);
315
316 INIT_LIST_HEAD(&tf->tf_list);
317 atomic_set(&tf->tf_access_cnt, 0);
318 /*
319 * Setup the default generic struct config_item_type's (cits) in
320 * struct target_fabric_configfs->tf_cit_tmpl
321 */
322 tf->tf_module = fabric_mod;
323 target_fabric_setup_cits(tf);
324
325 tf->tf_subsys = target_core_subsystem[0];
326 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
327
328 mutex_lock(&g_tf_lock);
329 list_add_tail(&tf->tf_list, &g_tf_list);
330 mutex_unlock(&g_tf_lock);
331
332 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
333 ">>>>>>>>>>>>>>\n");
334 printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
335 " %s\n", tf, tf->tf_name);
336 return tf;
337 }
338 EXPORT_SYMBOL(target_fabric_configfs_init);
339
340 /*
341 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
342 */
343 void target_fabric_configfs_free(
344 struct target_fabric_configfs *tf)
345 {
346 mutex_lock(&g_tf_lock);
347 list_del(&tf->tf_list);
348 mutex_unlock(&g_tf_lock);
349
350 kfree(tf);
351 }
352 EXPORT_SYMBOL(target_fabric_configfs_free);
353
354 /*
355 * Perform a sanity check of the passed tf->tf_ops before completing
356 * TCM fabric module registration.
357 */
358 static int target_fabric_tf_ops_check(
359 struct target_fabric_configfs *tf)
360 {
361 struct target_core_fabric_ops *tfo = &tf->tf_ops;
362
363 if (!(tfo->get_fabric_name)) {
364 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
365 return -EINVAL;
366 }
367 if (!(tfo->get_fabric_proto_ident)) {
368 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
369 return -EINVAL;
370 }
371 if (!(tfo->tpg_get_wwn)) {
372 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
373 return -EINVAL;
374 }
375 if (!(tfo->tpg_get_tag)) {
376 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
377 return -EINVAL;
378 }
379 if (!(tfo->tpg_get_default_depth)) {
380 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
381 return -EINVAL;
382 }
383 if (!(tfo->tpg_get_pr_transport_id)) {
384 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
385 return -EINVAL;
386 }
387 if (!(tfo->tpg_get_pr_transport_id_len)) {
388 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
389 return -EINVAL;
390 }
391 if (!(tfo->tpg_check_demo_mode)) {
392 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
393 return -EINVAL;
394 }
395 if (!(tfo->tpg_check_demo_mode_cache)) {
396 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
397 return -EINVAL;
398 }
399 if (!(tfo->tpg_check_demo_mode_write_protect)) {
400 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
401 return -EINVAL;
402 }
403 if (!(tfo->tpg_check_prod_mode_write_protect)) {
404 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
405 return -EINVAL;
406 }
407 if (!(tfo->tpg_alloc_fabric_acl)) {
408 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
409 return -EINVAL;
410 }
411 if (!(tfo->tpg_release_fabric_acl)) {
412 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
413 return -EINVAL;
414 }
415 if (!(tfo->tpg_get_inst_index)) {
416 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
417 return -EINVAL;
418 }
419 if (!(tfo->release_cmd_to_pool)) {
420 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
421 return -EINVAL;
422 }
423 if (!(tfo->release_cmd_direct)) {
424 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
425 return -EINVAL;
426 }
427 if (!(tfo->shutdown_session)) {
428 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
429 return -EINVAL;
430 }
431 if (!(tfo->close_session)) {
432 printk(KERN_ERR "Missing tfo->close_session()\n");
433 return -EINVAL;
434 }
435 if (!(tfo->stop_session)) {
436 printk(KERN_ERR "Missing tfo->stop_session()\n");
437 return -EINVAL;
438 }
439 if (!(tfo->fall_back_to_erl0)) {
440 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
441 return -EINVAL;
442 }
443 if (!(tfo->sess_logged_in)) {
444 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
445 return -EINVAL;
446 }
447 if (!(tfo->sess_get_index)) {
448 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
449 return -EINVAL;
450 }
451 if (!(tfo->write_pending)) {
452 printk(KERN_ERR "Missing tfo->write_pending()\n");
453 return -EINVAL;
454 }
455 if (!(tfo->write_pending_status)) {
456 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
457 return -EINVAL;
458 }
459 if (!(tfo->set_default_node_attributes)) {
460 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
461 return -EINVAL;
462 }
463 if (!(tfo->get_task_tag)) {
464 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
465 return -EINVAL;
466 }
467 if (!(tfo->get_cmd_state)) {
468 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
469 return -EINVAL;
470 }
471 if (!(tfo->new_cmd_failure)) {
472 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
473 return -EINVAL;
474 }
475 if (!(tfo->queue_data_in)) {
476 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
477 return -EINVAL;
478 }
479 if (!(tfo->queue_status)) {
480 printk(KERN_ERR "Missing tfo->queue_status()\n");
481 return -EINVAL;
482 }
483 if (!(tfo->queue_tm_rsp)) {
484 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
485 return -EINVAL;
486 }
487 if (!(tfo->set_fabric_sense_len)) {
488 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
489 return -EINVAL;
490 }
491 if (!(tfo->get_fabric_sense_len)) {
492 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
493 return -EINVAL;
494 }
495 if (!(tfo->is_state_remove)) {
496 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
497 return -EINVAL;
498 }
499 if (!(tfo->pack_lun)) {
500 printk(KERN_ERR "Missing tfo->pack_lun()\n");
501 return -EINVAL;
502 }
503 /*
504 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
505 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
506 * target_core_fabric_configfs.c WWN+TPG group context code.
507 */
508 if (!(tfo->fabric_make_wwn)) {
509 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
510 return -EINVAL;
511 }
512 if (!(tfo->fabric_drop_wwn)) {
513 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
514 return -EINVAL;
515 }
516 if (!(tfo->fabric_make_tpg)) {
517 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
518 return -EINVAL;
519 }
520 if (!(tfo->fabric_drop_tpg)) {
521 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
522 return -EINVAL;
523 }
524
525 return 0;
526 }
527
528 /*
529 * Called 2nd from fabric module with returned parameter of
530 * struct target_fabric_configfs * from target_fabric_configfs_init().
531 *
532 * Upon a successful registration, the new fabric's struct config_item is
533 * return. Also, a pointer to this struct is set in the passed
534 * struct target_fabric_configfs.
535 */
536 int target_fabric_configfs_register(
537 struct target_fabric_configfs *tf)
538 {
539 struct config_group *su_group;
540 int ret;
541
542 if (!(tf)) {
543 printk(KERN_ERR "Unable to locate target_fabric_configfs"
544 " pointer\n");
545 return -EINVAL;
546 }
547 if (!(tf->tf_subsys)) {
548 printk(KERN_ERR "Unable to target struct config_subsystem"
549 " pointer\n");
550 return -EINVAL;
551 }
552 su_group = &tf->tf_subsys->su_group;
553 if (!(su_group)) {
554 printk(KERN_ERR "Unable to locate target struct config_group"
555 " pointer\n");
556 return -EINVAL;
557 }
558 ret = target_fabric_tf_ops_check(tf);
559 if (ret < 0)
560 return ret;
561
562 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
563 ">>>>>>>>>>\n");
564 return 0;
565 }
566 EXPORT_SYMBOL(target_fabric_configfs_register);
567
568 void target_fabric_configfs_deregister(
569 struct target_fabric_configfs *tf)
570 {
571 struct config_group *su_group;
572 struct configfs_subsystem *su;
573
574 if (!(tf)) {
575 printk(KERN_ERR "Unable to locate passed target_fabric_"
576 "configfs\n");
577 return;
578 }
579 su = tf->tf_subsys;
580 if (!(su)) {
581 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
582 " pointer\n");
583 return;
584 }
585 su_group = &tf->tf_subsys->su_group;
586 if (!(su_group)) {
587 printk(KERN_ERR "Unable to locate target struct config_group"
588 " pointer\n");
589 return;
590 }
591
592 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
593 ">>>>>>>>>>>>\n");
594 mutex_lock(&g_tf_lock);
595 if (atomic_read(&tf->tf_access_cnt)) {
596 mutex_unlock(&g_tf_lock);
597 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
598 tf->tf_name);
599 BUG();
600 }
601 list_del(&tf->tf_list);
602 mutex_unlock(&g_tf_lock);
603
604 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
605 " %s\n", tf->tf_name);
606 tf->tf_module = NULL;
607 tf->tf_subsys = NULL;
608 kfree(tf);
609
610 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
611 ">>>>>\n");
612 return;
613 }
614 EXPORT_SYMBOL(target_fabric_configfs_deregister);
615
616 /*##############################################################################
617 // Stop functions called by external Target Fabrics Modules
618 //############################################################################*/
619
620 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
621
622 #define DEF_DEV_ATTRIB_SHOW(_name) \
623 static ssize_t target_core_dev_show_attr_##_name( \
624 struct se_dev_attrib *da, \
625 char *page) \
626 { \
627 struct se_device *dev; \
628 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
629 ssize_t rb; \
630 \
631 spin_lock(&se_dev->se_dev_lock); \
632 dev = se_dev->se_dev_ptr; \
633 if (!(dev)) { \
634 spin_unlock(&se_dev->se_dev_lock); \
635 return -ENODEV; \
636 } \
637 rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
638 spin_unlock(&se_dev->se_dev_lock); \
639 \
640 return rb; \
641 }
642
643 #define DEF_DEV_ATTRIB_STORE(_name) \
644 static ssize_t target_core_dev_store_attr_##_name( \
645 struct se_dev_attrib *da, \
646 const char *page, \
647 size_t count) \
648 { \
649 struct se_device *dev; \
650 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
651 unsigned long val; \
652 int ret; \
653 \
654 spin_lock(&se_dev->se_dev_lock); \
655 dev = se_dev->se_dev_ptr; \
656 if (!(dev)) { \
657 spin_unlock(&se_dev->se_dev_lock); \
658 return -ENODEV; \
659 } \
660 ret = strict_strtoul(page, 0, &val); \
661 if (ret < 0) { \
662 spin_unlock(&se_dev->se_dev_lock); \
663 printk(KERN_ERR "strict_strtoul() failed with" \
664 " ret: %d\n", ret); \
665 return -EINVAL; \
666 } \
667 ret = se_dev_set_##_name(dev, (u32)val); \
668 spin_unlock(&se_dev->se_dev_lock); \
669 \
670 return (!ret) ? count : -EINVAL; \
671 }
672
673 #define DEF_DEV_ATTRIB(_name) \
674 DEF_DEV_ATTRIB_SHOW(_name); \
675 DEF_DEV_ATTRIB_STORE(_name);
676
677 #define DEF_DEV_ATTRIB_RO(_name) \
678 DEF_DEV_ATTRIB_SHOW(_name);
679
680 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
681 #define SE_DEV_ATTR(_name, _mode) \
682 static struct target_core_dev_attrib_attribute \
683 target_core_dev_attrib_##_name = \
684 __CONFIGFS_EATTR(_name, _mode, \
685 target_core_dev_show_attr_##_name, \
686 target_core_dev_store_attr_##_name);
687
688 #define SE_DEV_ATTR_RO(_name); \
689 static struct target_core_dev_attrib_attribute \
690 target_core_dev_attrib_##_name = \
691 __CONFIGFS_EATTR_RO(_name, \
692 target_core_dev_show_attr_##_name);
693
694 DEF_DEV_ATTRIB(emulate_dpo);
695 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
696
697 DEF_DEV_ATTRIB(emulate_fua_write);
698 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
699
700 DEF_DEV_ATTRIB(emulate_fua_read);
701 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
702
703 DEF_DEV_ATTRIB(emulate_write_cache);
704 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
705
706 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
707 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
708
709 DEF_DEV_ATTRIB(emulate_tas);
710 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
711
712 DEF_DEV_ATTRIB(emulate_tpu);
713 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
714
715 DEF_DEV_ATTRIB(emulate_tpws);
716 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
717
718 DEF_DEV_ATTRIB(enforce_pr_isids);
719 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
720
721 DEF_DEV_ATTRIB_RO(hw_block_size);
722 SE_DEV_ATTR_RO(hw_block_size);
723
724 DEF_DEV_ATTRIB(block_size);
725 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
726
727 DEF_DEV_ATTRIB_RO(hw_max_sectors);
728 SE_DEV_ATTR_RO(hw_max_sectors);
729
730 DEF_DEV_ATTRIB(max_sectors);
731 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
732
733 DEF_DEV_ATTRIB(optimal_sectors);
734 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
735
736 DEF_DEV_ATTRIB_RO(hw_queue_depth);
737 SE_DEV_ATTR_RO(hw_queue_depth);
738
739 DEF_DEV_ATTRIB(queue_depth);
740 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
741
742 DEF_DEV_ATTRIB(task_timeout);
743 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
744
745 DEF_DEV_ATTRIB(max_unmap_lba_count);
746 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
747
748 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
749 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
750
751 DEF_DEV_ATTRIB(unmap_granularity);
752 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
753
754 DEF_DEV_ATTRIB(unmap_granularity_alignment);
755 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
756
757 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
758
759 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
760 &target_core_dev_attrib_emulate_dpo.attr,
761 &target_core_dev_attrib_emulate_fua_write.attr,
762 &target_core_dev_attrib_emulate_fua_read.attr,
763 &target_core_dev_attrib_emulate_write_cache.attr,
764 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
765 &target_core_dev_attrib_emulate_tas.attr,
766 &target_core_dev_attrib_emulate_tpu.attr,
767 &target_core_dev_attrib_emulate_tpws.attr,
768 &target_core_dev_attrib_enforce_pr_isids.attr,
769 &target_core_dev_attrib_hw_block_size.attr,
770 &target_core_dev_attrib_block_size.attr,
771 &target_core_dev_attrib_hw_max_sectors.attr,
772 &target_core_dev_attrib_max_sectors.attr,
773 &target_core_dev_attrib_optimal_sectors.attr,
774 &target_core_dev_attrib_hw_queue_depth.attr,
775 &target_core_dev_attrib_queue_depth.attr,
776 &target_core_dev_attrib_task_timeout.attr,
777 &target_core_dev_attrib_max_unmap_lba_count.attr,
778 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
779 &target_core_dev_attrib_unmap_granularity.attr,
780 &target_core_dev_attrib_unmap_granularity_alignment.attr,
781 NULL,
782 };
783
784 static struct configfs_item_operations target_core_dev_attrib_ops = {
785 .show_attribute = target_core_dev_attrib_attr_show,
786 .store_attribute = target_core_dev_attrib_attr_store,
787 };
788
789 static struct config_item_type target_core_dev_attrib_cit = {
790 .ct_item_ops = &target_core_dev_attrib_ops,
791 .ct_attrs = target_core_dev_attrib_attrs,
792 .ct_owner = THIS_MODULE,
793 };
794
795 /* End functions for struct config_item_type target_core_dev_attrib_cit */
796
797 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
798
799 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
800 #define SE_DEV_WWN_ATTR(_name, _mode) \
801 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
802 __CONFIGFS_EATTR(_name, _mode, \
803 target_core_dev_wwn_show_attr_##_name, \
804 target_core_dev_wwn_store_attr_##_name);
805
806 #define SE_DEV_WWN_ATTR_RO(_name); \
807 do { \
808 static struct target_core_dev_wwn_attribute \
809 target_core_dev_wwn_##_name = \
810 __CONFIGFS_EATTR_RO(_name, \
811 target_core_dev_wwn_show_attr_##_name); \
812 } while (0);
813
814 /*
815 * VPD page 0x80 Unit serial
816 */
817 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
818 struct t10_wwn *t10_wwn,
819 char *page)
820 {
821 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
822 struct se_device *dev;
823
824 dev = se_dev->se_dev_ptr;
825 if (!(dev))
826 return -ENODEV;
827
828 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
829 &t10_wwn->unit_serial[0]);
830 }
831
832 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
833 struct t10_wwn *t10_wwn,
834 const char *page,
835 size_t count)
836 {
837 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
838 struct se_device *dev;
839 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
840
841 /*
842 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
843 * from the struct scsi_device level firmware, do not allow
844 * VPD Unit Serial to be emulated.
845 *
846 * Note this struct scsi_device could also be emulating VPD
847 * information from its drivers/scsi LLD. But for now we assume
848 * it is doing 'the right thing' wrt a world wide unique
849 * VPD Unit Serial Number that OS dependent multipath can depend on.
850 */
851 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
852 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
853 " Unit Serial, ignoring request\n");
854 return -EOPNOTSUPP;
855 }
856
857 if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
858 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
859 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
860 return -EOVERFLOW;
861 }
862 /*
863 * Check to see if any active $FABRIC_MOD exports exist. If they
864 * do exist, fail here as changing this information on the fly
865 * (underneath the initiator side OS dependent multipath code)
866 * could cause negative effects.
867 */
868 dev = su_dev->se_dev_ptr;
869 if ((dev)) {
870 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
871 printk(KERN_ERR "Unable to set VPD Unit Serial while"
872 " active %d $FABRIC_MOD exports exist\n",
873 atomic_read(&dev->dev_export_obj.obj_access_count));
874 return -EINVAL;
875 }
876 }
877 /*
878 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
879 *
880 * Also, strip any newline added from the userspace
881 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
882 */
883 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
884 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
885 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
886 "%s", strstrip(buf));
887 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
888
889 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
890 " %s\n", su_dev->t10_wwn.unit_serial);
891
892 return count;
893 }
894
895 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
896
897 /*
898 * VPD page 0x83 Protocol Identifier
899 */
900 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
901 struct t10_wwn *t10_wwn,
902 char *page)
903 {
904 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
905 struct se_device *dev;
906 struct t10_vpd *vpd;
907 unsigned char buf[VPD_TMP_BUF_SIZE];
908 ssize_t len = 0;
909
910 dev = se_dev->se_dev_ptr;
911 if (!(dev))
912 return -ENODEV;
913
914 memset(buf, 0, VPD_TMP_BUF_SIZE);
915
916 spin_lock(&t10_wwn->t10_vpd_lock);
917 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
918 if (!(vpd->protocol_identifier_set))
919 continue;
920
921 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
922
923 if ((len + strlen(buf) > PAGE_SIZE))
924 break;
925
926 len += sprintf(page+len, "%s", buf);
927 }
928 spin_unlock(&t10_wwn->t10_vpd_lock);
929
930 return len;
931 }
932
933 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
934 struct t10_wwn *t10_wwn,
935 const char *page,
936 size_t count)
937 {
938 return -ENOSYS;
939 }
940
941 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
942
943 /*
944 * Generic wrapper for dumping VPD identifiers by association.
945 */
946 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
947 static ssize_t target_core_dev_wwn_show_attr_##_name( \
948 struct t10_wwn *t10_wwn, \
949 char *page) \
950 { \
951 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
952 struct se_device *dev; \
953 struct t10_vpd *vpd; \
954 unsigned char buf[VPD_TMP_BUF_SIZE]; \
955 ssize_t len = 0; \
956 \
957 dev = se_dev->se_dev_ptr; \
958 if (!(dev)) \
959 return -ENODEV; \
960 \
961 spin_lock(&t10_wwn->t10_vpd_lock); \
962 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
963 if (vpd->association != _assoc) \
964 continue; \
965 \
966 memset(buf, 0, VPD_TMP_BUF_SIZE); \
967 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
968 if ((len + strlen(buf) > PAGE_SIZE)) \
969 break; \
970 len += sprintf(page+len, "%s", buf); \
971 \
972 memset(buf, 0, VPD_TMP_BUF_SIZE); \
973 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
974 if ((len + strlen(buf) > PAGE_SIZE)) \
975 break; \
976 len += sprintf(page+len, "%s", buf); \
977 \
978 memset(buf, 0, VPD_TMP_BUF_SIZE); \
979 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
980 if ((len + strlen(buf) > PAGE_SIZE)) \
981 break; \
982 len += sprintf(page+len, "%s", buf); \
983 } \
984 spin_unlock(&t10_wwn->t10_vpd_lock); \
985 \
986 return len; \
987 }
988
989 /*
990 * VPD page 0x83 Assoication: Logical Unit
991 */
992 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
993
994 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
995 struct t10_wwn *t10_wwn,
996 const char *page,
997 size_t count)
998 {
999 return -ENOSYS;
1000 }
1001
1002 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1003
1004 /*
1005 * VPD page 0x83 Association: Target Port
1006 */
1007 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1008
1009 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1010 struct t10_wwn *t10_wwn,
1011 const char *page,
1012 size_t count)
1013 {
1014 return -ENOSYS;
1015 }
1016
1017 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1018
1019 /*
1020 * VPD page 0x83 Association: SCSI Target Device
1021 */
1022 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1023
1024 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1025 struct t10_wwn *t10_wwn,
1026 const char *page,
1027 size_t count)
1028 {
1029 return -ENOSYS;
1030 }
1031
1032 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1033
1034 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1035
1036 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1037 &target_core_dev_wwn_vpd_unit_serial.attr,
1038 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1039 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1040 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1041 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1042 NULL,
1043 };
1044
1045 static struct configfs_item_operations target_core_dev_wwn_ops = {
1046 .show_attribute = target_core_dev_wwn_attr_show,
1047 .store_attribute = target_core_dev_wwn_attr_store,
1048 };
1049
1050 static struct config_item_type target_core_dev_wwn_cit = {
1051 .ct_item_ops = &target_core_dev_wwn_ops,
1052 .ct_attrs = target_core_dev_wwn_attrs,
1053 .ct_owner = THIS_MODULE,
1054 };
1055
1056 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1057
1058 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1059
1060 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1061 #define SE_DEV_PR_ATTR(_name, _mode) \
1062 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1063 __CONFIGFS_EATTR(_name, _mode, \
1064 target_core_dev_pr_show_attr_##_name, \
1065 target_core_dev_pr_store_attr_##_name);
1066
1067 #define SE_DEV_PR_ATTR_RO(_name); \
1068 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1069 __CONFIGFS_EATTR_RO(_name, \
1070 target_core_dev_pr_show_attr_##_name);
1071
1072 /*
1073 * res_holder
1074 */
1075 static ssize_t target_core_dev_pr_show_spc3_res(
1076 struct se_device *dev,
1077 char *page,
1078 ssize_t *len)
1079 {
1080 struct se_node_acl *se_nacl;
1081 struct t10_pr_registration *pr_reg;
1082 char i_buf[PR_REG_ISID_ID_LEN];
1083 int prf_isid;
1084
1085 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1086
1087 spin_lock(&dev->dev_reservation_lock);
1088 pr_reg = dev->dev_pr_res_holder;
1089 if (!(pr_reg)) {
1090 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1091 spin_unlock(&dev->dev_reservation_lock);
1092 return *len;
1093 }
1094 se_nacl = pr_reg->pr_reg_nacl;
1095 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1096 PR_REG_ISID_ID_LEN);
1097
1098 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1099 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1100 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1101 spin_unlock(&dev->dev_reservation_lock);
1102
1103 return *len;
1104 }
1105
1106 static ssize_t target_core_dev_pr_show_spc2_res(
1107 struct se_device *dev,
1108 char *page,
1109 ssize_t *len)
1110 {
1111 struct se_node_acl *se_nacl;
1112
1113 spin_lock(&dev->dev_reservation_lock);
1114 se_nacl = dev->dev_reserved_node_acl;
1115 if (!(se_nacl)) {
1116 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1117 spin_unlock(&dev->dev_reservation_lock);
1118 return *len;
1119 }
1120 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1121 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1122 se_nacl->initiatorname);
1123 spin_unlock(&dev->dev_reservation_lock);
1124
1125 return *len;
1126 }
1127
1128 static ssize_t target_core_dev_pr_show_attr_res_holder(
1129 struct se_subsystem_dev *su_dev,
1130 char *page)
1131 {
1132 ssize_t len = 0;
1133
1134 if (!(su_dev->se_dev_ptr))
1135 return -ENODEV;
1136
1137 switch (T10_RES(su_dev)->res_type) {
1138 case SPC3_PERSISTENT_RESERVATIONS:
1139 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1140 page, &len);
1141 break;
1142 case SPC2_RESERVATIONS:
1143 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1144 page, &len);
1145 break;
1146 case SPC_PASSTHROUGH:
1147 len += sprintf(page+len, "Passthrough\n");
1148 break;
1149 default:
1150 len += sprintf(page+len, "Unknown\n");
1151 break;
1152 }
1153
1154 return len;
1155 }
1156
1157 SE_DEV_PR_ATTR_RO(res_holder);
1158
1159 /*
1160 * res_pr_all_tgt_pts
1161 */
1162 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1163 struct se_subsystem_dev *su_dev,
1164 char *page)
1165 {
1166 struct se_device *dev;
1167 struct t10_pr_registration *pr_reg;
1168 ssize_t len = 0;
1169
1170 dev = su_dev->se_dev_ptr;
1171 if (!(dev))
1172 return -ENODEV;
1173
1174 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1175 return len;
1176
1177 spin_lock(&dev->dev_reservation_lock);
1178 pr_reg = dev->dev_pr_res_holder;
1179 if (!(pr_reg)) {
1180 len = sprintf(page, "No SPC-3 Reservation holder\n");
1181 spin_unlock(&dev->dev_reservation_lock);
1182 return len;
1183 }
1184 /*
1185 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1186 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1187 */
1188 if (pr_reg->pr_reg_all_tg_pt)
1189 len = sprintf(page, "SPC-3 Reservation: All Target"
1190 " Ports registration\n");
1191 else
1192 len = sprintf(page, "SPC-3 Reservation: Single"
1193 " Target Port registration\n");
1194 spin_unlock(&dev->dev_reservation_lock);
1195
1196 return len;
1197 }
1198
1199 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1200
1201 /*
1202 * res_pr_generation
1203 */
1204 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1205 struct se_subsystem_dev *su_dev,
1206 char *page)
1207 {
1208 if (!(su_dev->se_dev_ptr))
1209 return -ENODEV;
1210
1211 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1212 return 0;
1213
1214 return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1215 }
1216
1217 SE_DEV_PR_ATTR_RO(res_pr_generation);
1218
1219 /*
1220 * res_pr_holder_tg_port
1221 */
1222 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1223 struct se_subsystem_dev *su_dev,
1224 char *page)
1225 {
1226 struct se_device *dev;
1227 struct se_node_acl *se_nacl;
1228 struct se_lun *lun;
1229 struct se_portal_group *se_tpg;
1230 struct t10_pr_registration *pr_reg;
1231 struct target_core_fabric_ops *tfo;
1232 ssize_t len = 0;
1233
1234 dev = su_dev->se_dev_ptr;
1235 if (!(dev))
1236 return -ENODEV;
1237
1238 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1239 return len;
1240
1241 spin_lock(&dev->dev_reservation_lock);
1242 pr_reg = dev->dev_pr_res_holder;
1243 if (!(pr_reg)) {
1244 len = sprintf(page, "No SPC-3 Reservation holder\n");
1245 spin_unlock(&dev->dev_reservation_lock);
1246 return len;
1247 }
1248 se_nacl = pr_reg->pr_reg_nacl;
1249 se_tpg = se_nacl->se_tpg;
1250 lun = pr_reg->pr_reg_tg_pt_lun;
1251 tfo = TPG_TFO(se_tpg);
1252
1253 len += sprintf(page+len, "SPC-3 Reservation: %s"
1254 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1255 tfo->tpg_get_wwn(se_tpg));
1256 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1257 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1258 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1259 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1260 tfo->get_fabric_name(), lun->unpacked_lun);
1261 spin_unlock(&dev->dev_reservation_lock);
1262
1263 return len;
1264 }
1265
1266 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1267
1268 /*
1269 * res_pr_registered_i_pts
1270 */
1271 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1272 struct se_subsystem_dev *su_dev,
1273 char *page)
1274 {
1275 struct target_core_fabric_ops *tfo;
1276 struct t10_pr_registration *pr_reg;
1277 unsigned char buf[384];
1278 char i_buf[PR_REG_ISID_ID_LEN];
1279 ssize_t len = 0;
1280 int reg_count = 0, prf_isid;
1281
1282 if (!(su_dev->se_dev_ptr))
1283 return -ENODEV;
1284
1285 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1286 return len;
1287
1288 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1289
1290 spin_lock(&T10_RES(su_dev)->registration_lock);
1291 list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1292 pr_reg_list) {
1293
1294 memset(buf, 0, 384);
1295 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1296 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1297 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1298 PR_REG_ISID_ID_LEN);
1299 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1300 tfo->get_fabric_name(),
1301 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1302 &i_buf[0] : "", pr_reg->pr_res_key,
1303 pr_reg->pr_res_generation);
1304
1305 if ((len + strlen(buf) > PAGE_SIZE))
1306 break;
1307
1308 len += sprintf(page+len, "%s", buf);
1309 reg_count++;
1310 }
1311 spin_unlock(&T10_RES(su_dev)->registration_lock);
1312
1313 if (!(reg_count))
1314 len += sprintf(page+len, "None\n");
1315
1316 return len;
1317 }
1318
1319 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1320
1321 /*
1322 * res_pr_type
1323 */
1324 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1325 struct se_subsystem_dev *su_dev,
1326 char *page)
1327 {
1328 struct se_device *dev;
1329 struct t10_pr_registration *pr_reg;
1330 ssize_t len = 0;
1331
1332 dev = su_dev->se_dev_ptr;
1333 if (!(dev))
1334 return -ENODEV;
1335
1336 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1337 return len;
1338
1339 spin_lock(&dev->dev_reservation_lock);
1340 pr_reg = dev->dev_pr_res_holder;
1341 if (!(pr_reg)) {
1342 len = sprintf(page, "No SPC-3 Reservation holder\n");
1343 spin_unlock(&dev->dev_reservation_lock);
1344 return len;
1345 }
1346 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1347 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1348 spin_unlock(&dev->dev_reservation_lock);
1349
1350 return len;
1351 }
1352
1353 SE_DEV_PR_ATTR_RO(res_pr_type);
1354
1355 /*
1356 * res_type
1357 */
1358 static ssize_t target_core_dev_pr_show_attr_res_type(
1359 struct se_subsystem_dev *su_dev,
1360 char *page)
1361 {
1362 ssize_t len = 0;
1363
1364 if (!(su_dev->se_dev_ptr))
1365 return -ENODEV;
1366
1367 switch (T10_RES(su_dev)->res_type) {
1368 case SPC3_PERSISTENT_RESERVATIONS:
1369 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1370 break;
1371 case SPC2_RESERVATIONS:
1372 len = sprintf(page, "SPC2_RESERVATIONS\n");
1373 break;
1374 case SPC_PASSTHROUGH:
1375 len = sprintf(page, "SPC_PASSTHROUGH\n");
1376 break;
1377 default:
1378 len = sprintf(page, "UNKNOWN\n");
1379 break;
1380 }
1381
1382 return len;
1383 }
1384
1385 SE_DEV_PR_ATTR_RO(res_type);
1386
1387 /*
1388 * res_aptpl_active
1389 */
1390
1391 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1392 struct se_subsystem_dev *su_dev,
1393 char *page)
1394 {
1395 if (!(su_dev->se_dev_ptr))
1396 return -ENODEV;
1397
1398 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1399 return 0;
1400
1401 return sprintf(page, "APTPL Bit Status: %s\n",
1402 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1403 }
1404
1405 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1406
1407 /*
1408 * res_aptpl_metadata
1409 */
1410 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1411 struct se_subsystem_dev *su_dev,
1412 char *page)
1413 {
1414 if (!(su_dev->se_dev_ptr))
1415 return -ENODEV;
1416
1417 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1418 return 0;
1419
1420 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1421 }
1422
1423 enum {
1424 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1425 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1426 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1427 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1428 };
1429
1430 static match_table_t tokens = {
1431 {Opt_initiator_fabric, "initiator_fabric=%s"},
1432 {Opt_initiator_node, "initiator_node=%s"},
1433 {Opt_initiator_sid, "initiator_sid=%s"},
1434 {Opt_sa_res_key, "sa_res_key=%s"},
1435 {Opt_res_holder, "res_holder=%d"},
1436 {Opt_res_type, "res_type=%d"},
1437 {Opt_res_scope, "res_scope=%d"},
1438 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1439 {Opt_mapped_lun, "mapped_lun=%d"},
1440 {Opt_target_fabric, "target_fabric=%s"},
1441 {Opt_target_node, "target_node=%s"},
1442 {Opt_tpgt, "tpgt=%d"},
1443 {Opt_port_rtpi, "port_rtpi=%d"},
1444 {Opt_target_lun, "target_lun=%d"},
1445 {Opt_err, NULL}
1446 };
1447
1448 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1449 struct se_subsystem_dev *su_dev,
1450 const char *page,
1451 size_t count)
1452 {
1453 struct se_device *dev;
1454 unsigned char *i_fabric, *t_fabric, *i_port = NULL, *t_port = NULL;
1455 unsigned char *isid = NULL;
1456 char *orig, *ptr, *arg_p, *opts;
1457 substring_t args[MAX_OPT_ARGS];
1458 unsigned long long tmp_ll;
1459 u64 sa_res_key = 0;
1460 u32 mapped_lun = 0, target_lun = 0;
1461 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1462 u16 port_rpti = 0, tpgt = 0;
1463 u8 type = 0, scope;
1464
1465 dev = su_dev->se_dev_ptr;
1466 if (!(dev))
1467 return -ENODEV;
1468
1469 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1470 return 0;
1471
1472 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1473 printk(KERN_INFO "Unable to process APTPL metadata while"
1474 " active fabric exports exist\n");
1475 return -EINVAL;
1476 }
1477
1478 opts = kstrdup(page, GFP_KERNEL);
1479 if (!opts)
1480 return -ENOMEM;
1481
1482 orig = opts;
1483 while ((ptr = strsep(&opts, ",")) != NULL) {
1484 if (!*ptr)
1485 continue;
1486
1487 token = match_token(ptr, tokens, args);
1488 switch (token) {
1489 case Opt_initiator_fabric:
1490 i_fabric = match_strdup(&args[0]);
1491 break;
1492 case Opt_initiator_node:
1493 i_port = match_strdup(&args[0]);
1494 if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
1495 printk(KERN_ERR "APTPL metadata initiator_node="
1496 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1497 PR_APTPL_MAX_IPORT_LEN);
1498 ret = -EINVAL;
1499 break;
1500 }
1501 break;
1502 case Opt_initiator_sid:
1503 isid = match_strdup(&args[0]);
1504 if (strlen(isid) > PR_REG_ISID_LEN) {
1505 printk(KERN_ERR "APTPL metadata initiator_isid"
1506 "= exceeds PR_REG_ISID_LEN: %d\n",
1507 PR_REG_ISID_LEN);
1508 ret = -EINVAL;
1509 break;
1510 }
1511 break;
1512 case Opt_sa_res_key:
1513 arg_p = match_strdup(&args[0]);
1514 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1515 if (ret < 0) {
1516 printk(KERN_ERR "strict_strtoull() failed for"
1517 " sa_res_key=\n");
1518 goto out;
1519 }
1520 sa_res_key = (u64)tmp_ll;
1521 break;
1522 /*
1523 * PR APTPL Metadata for Reservation
1524 */
1525 case Opt_res_holder:
1526 match_int(args, &arg);
1527 res_holder = arg;
1528 break;
1529 case Opt_res_type:
1530 match_int(args, &arg);
1531 type = (u8)arg;
1532 break;
1533 case Opt_res_scope:
1534 match_int(args, &arg);
1535 scope = (u8)arg;
1536 break;
1537 case Opt_res_all_tg_pt:
1538 match_int(args, &arg);
1539 all_tg_pt = (int)arg;
1540 break;
1541 case Opt_mapped_lun:
1542 match_int(args, &arg);
1543 mapped_lun = (u32)arg;
1544 break;
1545 /*
1546 * PR APTPL Metadata for Target Port
1547 */
1548 case Opt_target_fabric:
1549 t_fabric = match_strdup(&args[0]);
1550 break;
1551 case Opt_target_node:
1552 t_port = match_strdup(&args[0]);
1553 if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
1554 printk(KERN_ERR "APTPL metadata target_node="
1555 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1556 PR_APTPL_MAX_TPORT_LEN);
1557 ret = -EINVAL;
1558 break;
1559 }
1560 break;
1561 case Opt_tpgt:
1562 match_int(args, &arg);
1563 tpgt = (u16)arg;
1564 break;
1565 case Opt_port_rtpi:
1566 match_int(args, &arg);
1567 port_rpti = (u16)arg;
1568 break;
1569 case Opt_target_lun:
1570 match_int(args, &arg);
1571 target_lun = (u32)arg;
1572 break;
1573 default:
1574 break;
1575 }
1576 }
1577
1578 if (!(i_port) || !(t_port) || !(sa_res_key)) {
1579 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1580 ret = -EINVAL;
1581 goto out;
1582 }
1583
1584 if (res_holder && !(type)) {
1585 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1586 " holder\n", type);
1587 ret = -EINVAL;
1588 goto out;
1589 }
1590
1591 ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1592 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1593 res_holder, all_tg_pt, type);
1594 out:
1595 kfree(orig);
1596 return (ret == 0) ? count : ret;
1597 }
1598
1599 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1600
1601 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1602
1603 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1604 &target_core_dev_pr_res_holder.attr,
1605 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1606 &target_core_dev_pr_res_pr_generation.attr,
1607 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1608 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1609 &target_core_dev_pr_res_pr_type.attr,
1610 &target_core_dev_pr_res_type.attr,
1611 &target_core_dev_pr_res_aptpl_active.attr,
1612 &target_core_dev_pr_res_aptpl_metadata.attr,
1613 NULL,
1614 };
1615
1616 static struct configfs_item_operations target_core_dev_pr_ops = {
1617 .show_attribute = target_core_dev_pr_attr_show,
1618 .store_attribute = target_core_dev_pr_attr_store,
1619 };
1620
1621 static struct config_item_type target_core_dev_pr_cit = {
1622 .ct_item_ops = &target_core_dev_pr_ops,
1623 .ct_attrs = target_core_dev_pr_attrs,
1624 .ct_owner = THIS_MODULE,
1625 };
1626
1627 /* End functions for struct config_item_type target_core_dev_pr_cit */
1628
1629 /* Start functions for struct config_item_type target_core_dev_cit */
1630
1631 static ssize_t target_core_show_dev_info(void *p, char *page)
1632 {
1633 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1634 struct se_hba *hba = se_dev->se_dev_hba;
1635 struct se_subsystem_api *t = hba->transport;
1636 int bl = 0;
1637 ssize_t read_bytes = 0;
1638
1639 if (!(se_dev->se_dev_ptr))
1640 return -ENODEV;
1641
1642 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1643 read_bytes += bl;
1644 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1645 return read_bytes;
1646 }
1647
1648 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1649 .attr = { .ca_owner = THIS_MODULE,
1650 .ca_name = "info",
1651 .ca_mode = S_IRUGO },
1652 .show = target_core_show_dev_info,
1653 .store = NULL,
1654 };
1655
1656 static ssize_t target_core_store_dev_control(
1657 void *p,
1658 const char *page,
1659 size_t count)
1660 {
1661 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1662 struct se_hba *hba = se_dev->se_dev_hba;
1663 struct se_subsystem_api *t = hba->transport;
1664
1665 if (!(se_dev->se_dev_su_ptr)) {
1666 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1667 "_dev_su_ptr\n");
1668 return -EINVAL;
1669 }
1670
1671 return t->set_configfs_dev_params(hba, se_dev, page, count);
1672 }
1673
1674 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1675 .attr = { .ca_owner = THIS_MODULE,
1676 .ca_name = "control",
1677 .ca_mode = S_IWUSR },
1678 .show = NULL,
1679 .store = target_core_store_dev_control,
1680 };
1681
1682 static ssize_t target_core_show_dev_alias(void *p, char *page)
1683 {
1684 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1685
1686 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1687 return 0;
1688
1689 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1690 }
1691
1692 static ssize_t target_core_store_dev_alias(
1693 void *p,
1694 const char *page,
1695 size_t count)
1696 {
1697 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1698 struct se_hba *hba = se_dev->se_dev_hba;
1699 ssize_t read_bytes;
1700
1701 if (count > (SE_DEV_ALIAS_LEN-1)) {
1702 printk(KERN_ERR "alias count: %d exceeds"
1703 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1704 SE_DEV_ALIAS_LEN-1);
1705 return -EINVAL;
1706 }
1707
1708 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1709 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1710 "%s", page);
1711
1712 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1713 config_item_name(&hba->hba_group.cg_item),
1714 config_item_name(&se_dev->se_dev_group.cg_item),
1715 se_dev->se_dev_alias);
1716
1717 return read_bytes;
1718 }
1719
1720 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1721 .attr = { .ca_owner = THIS_MODULE,
1722 .ca_name = "alias",
1723 .ca_mode = S_IRUGO | S_IWUSR },
1724 .show = target_core_show_dev_alias,
1725 .store = target_core_store_dev_alias,
1726 };
1727
1728 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1729 {
1730 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1731
1732 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1733 return 0;
1734
1735 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1736 }
1737
1738 static ssize_t target_core_store_dev_udev_path(
1739 void *p,
1740 const char *page,
1741 size_t count)
1742 {
1743 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1744 struct se_hba *hba = se_dev->se_dev_hba;
1745 ssize_t read_bytes;
1746
1747 if (count > (SE_UDEV_PATH_LEN-1)) {
1748 printk(KERN_ERR "udev_path count: %d exceeds"
1749 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1750 SE_UDEV_PATH_LEN-1);
1751 return -EINVAL;
1752 }
1753
1754 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1755 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1756 "%s", page);
1757
1758 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1759 config_item_name(&hba->hba_group.cg_item),
1760 config_item_name(&se_dev->se_dev_group.cg_item),
1761 se_dev->se_dev_udev_path);
1762
1763 return read_bytes;
1764 }
1765
1766 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1767 .attr = { .ca_owner = THIS_MODULE,
1768 .ca_name = "udev_path",
1769 .ca_mode = S_IRUGO | S_IWUSR },
1770 .show = target_core_show_dev_udev_path,
1771 .store = target_core_store_dev_udev_path,
1772 };
1773
1774 static ssize_t target_core_store_dev_enable(
1775 void *p,
1776 const char *page,
1777 size_t count)
1778 {
1779 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1780 struct se_device *dev;
1781 struct se_hba *hba = se_dev->se_dev_hba;
1782 struct se_subsystem_api *t = hba->transport;
1783 char *ptr;
1784
1785 ptr = strstr(page, "1");
1786 if (!(ptr)) {
1787 printk(KERN_ERR "For dev_enable ops, only valid value"
1788 " is \"1\"\n");
1789 return -EINVAL;
1790 }
1791 if ((se_dev->se_dev_ptr)) {
1792 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1793 " object\n");
1794 return -EEXIST;
1795 }
1796
1797 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1798 return -EINVAL;
1799
1800 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1801 if (!(dev) || IS_ERR(dev))
1802 return -EINVAL;
1803
1804 se_dev->se_dev_ptr = dev;
1805 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1806 " %p\n", se_dev->se_dev_ptr);
1807
1808 return count;
1809 }
1810
1811 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1812 .attr = { .ca_owner = THIS_MODULE,
1813 .ca_name = "enable",
1814 .ca_mode = S_IWUSR },
1815 .show = NULL,
1816 .store = target_core_store_dev_enable,
1817 };
1818
1819 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1820 {
1821 struct se_device *dev;
1822 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1823 struct config_item *lu_ci;
1824 struct t10_alua_lu_gp *lu_gp;
1825 struct t10_alua_lu_gp_member *lu_gp_mem;
1826 ssize_t len = 0;
1827
1828 dev = su_dev->se_dev_ptr;
1829 if (!(dev))
1830 return -ENODEV;
1831
1832 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1833 return len;
1834
1835 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1836 if (!(lu_gp_mem)) {
1837 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1838 " pointer\n");
1839 return -EINVAL;
1840 }
1841
1842 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1843 lu_gp = lu_gp_mem->lu_gp;
1844 if ((lu_gp)) {
1845 lu_ci = &lu_gp->lu_gp_group.cg_item;
1846 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1847 config_item_name(lu_ci), lu_gp->lu_gp_id);
1848 }
1849 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1850
1851 return len;
1852 }
1853
1854 static ssize_t target_core_store_alua_lu_gp(
1855 void *p,
1856 const char *page,
1857 size_t count)
1858 {
1859 struct se_device *dev;
1860 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1861 struct se_hba *hba = su_dev->se_dev_hba;
1862 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1863 struct t10_alua_lu_gp_member *lu_gp_mem;
1864 unsigned char buf[LU_GROUP_NAME_BUF];
1865 int move = 0;
1866
1867 dev = su_dev->se_dev_ptr;
1868 if (!(dev))
1869 return -ENODEV;
1870
1871 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1872 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1873 config_item_name(&hba->hba_group.cg_item),
1874 config_item_name(&su_dev->se_dev_group.cg_item));
1875 return -EINVAL;
1876 }
1877 if (count > LU_GROUP_NAME_BUF) {
1878 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1879 return -EINVAL;
1880 }
1881 memset(buf, 0, LU_GROUP_NAME_BUF);
1882 memcpy(buf, page, count);
1883 /*
1884 * Any ALUA logical unit alias besides "NULL" means we will be
1885 * making a new group association.
1886 */
1887 if (strcmp(strstrip(buf), "NULL")) {
1888 /*
1889 * core_alua_get_lu_gp_by_name() will increment reference to
1890 * struct t10_alua_lu_gp. This reference is released with
1891 * core_alua_get_lu_gp_by_name below().
1892 */
1893 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1894 if (!(lu_gp_new))
1895 return -ENODEV;
1896 }
1897 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1898 if (!(lu_gp_mem)) {
1899 if (lu_gp_new)
1900 core_alua_put_lu_gp_from_name(lu_gp_new);
1901 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1902 " pointer\n");
1903 return -EINVAL;
1904 }
1905
1906 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1907 lu_gp = lu_gp_mem->lu_gp;
1908 if ((lu_gp)) {
1909 /*
1910 * Clearing an existing lu_gp association, and replacing
1911 * with NULL
1912 */
1913 if (!(lu_gp_new)) {
1914 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1915 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1916 " %hu\n",
1917 config_item_name(&hba->hba_group.cg_item),
1918 config_item_name(&su_dev->se_dev_group.cg_item),
1919 config_item_name(&lu_gp->lu_gp_group.cg_item),
1920 lu_gp->lu_gp_id);
1921
1922 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1923 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1924
1925 return count;
1926 }
1927 /*
1928 * Removing existing association of lu_gp_mem with lu_gp
1929 */
1930 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1931 move = 1;
1932 }
1933 /*
1934 * Associate lu_gp_mem with lu_gp_new.
1935 */
1936 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1937 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1938
1939 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1940 " core/alua/lu_gps/%s, ID: %hu\n",
1941 (move) ? "Moving" : "Adding",
1942 config_item_name(&hba->hba_group.cg_item),
1943 config_item_name(&su_dev->se_dev_group.cg_item),
1944 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1945 lu_gp_new->lu_gp_id);
1946
1947 core_alua_put_lu_gp_from_name(lu_gp_new);
1948 return count;
1949 }
1950
1951 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1952 .attr = { .ca_owner = THIS_MODULE,
1953 .ca_name = "alua_lu_gp",
1954 .ca_mode = S_IRUGO | S_IWUSR },
1955 .show = target_core_show_alua_lu_gp,
1956 .store = target_core_store_alua_lu_gp,
1957 };
1958
1959 static struct configfs_attribute *lio_core_dev_attrs[] = {
1960 &target_core_attr_dev_info.attr,
1961 &target_core_attr_dev_control.attr,
1962 &target_core_attr_dev_alias.attr,
1963 &target_core_attr_dev_udev_path.attr,
1964 &target_core_attr_dev_enable.attr,
1965 &target_core_attr_dev_alua_lu_gp.attr,
1966 NULL,
1967 };
1968
1969 static void target_core_dev_release(struct config_item *item)
1970 {
1971 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1972 struct se_subsystem_dev, se_dev_group);
1973 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1974 struct se_subsystem_api *t = hba->transport;
1975 struct config_group *dev_cg = &se_dev->se_dev_group;
1976
1977 kfree(dev_cg->default_groups);
1978 /*
1979 * This pointer will set when the storage is enabled with:
1980 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1981 */
1982 if (se_dev->se_dev_ptr) {
1983 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
1984 "virtual_device() for se_dev_ptr: %p\n",
1985 se_dev->se_dev_ptr);
1986
1987 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1988 } else {
1989 /*
1990 * Release struct se_subsystem_dev->se_dev_su_ptr..
1991 */
1992 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
1993 "device() for se_dev_su_ptr: %p\n",
1994 se_dev->se_dev_su_ptr);
1995
1996 t->free_device(se_dev->se_dev_su_ptr);
1997 }
1998
1999 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2000 "_dev_t: %p\n", se_dev);
2001 kfree(se_dev);
2002 }
2003
2004 static ssize_t target_core_dev_show(struct config_item *item,
2005 struct configfs_attribute *attr,
2006 char *page)
2007 {
2008 struct se_subsystem_dev *se_dev = container_of(
2009 to_config_group(item), struct se_subsystem_dev,
2010 se_dev_group);
2011 struct target_core_configfs_attribute *tc_attr = container_of(
2012 attr, struct target_core_configfs_attribute, attr);
2013
2014 if (!(tc_attr->show))
2015 return -EINVAL;
2016
2017 return tc_attr->show((void *)se_dev, page);
2018 }
2019
2020 static ssize_t target_core_dev_store(struct config_item *item,
2021 struct configfs_attribute *attr,
2022 const char *page, size_t count)
2023 {
2024 struct se_subsystem_dev *se_dev = container_of(
2025 to_config_group(item), struct se_subsystem_dev,
2026 se_dev_group);
2027 struct target_core_configfs_attribute *tc_attr = container_of(
2028 attr, struct target_core_configfs_attribute, attr);
2029
2030 if (!(tc_attr->store))
2031 return -EINVAL;
2032
2033 return tc_attr->store((void *)se_dev, page, count);
2034 }
2035
2036 static struct configfs_item_operations target_core_dev_item_ops = {
2037 .release = target_core_dev_release,
2038 .show_attribute = target_core_dev_show,
2039 .store_attribute = target_core_dev_store,
2040 };
2041
2042 static struct config_item_type target_core_dev_cit = {
2043 .ct_item_ops = &target_core_dev_item_ops,
2044 .ct_attrs = lio_core_dev_attrs,
2045 .ct_owner = THIS_MODULE,
2046 };
2047
2048 /* End functions for struct config_item_type target_core_dev_cit */
2049
2050 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2051
2052 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2053 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2054 static struct target_core_alua_lu_gp_attribute \
2055 target_core_alua_lu_gp_##_name = \
2056 __CONFIGFS_EATTR(_name, _mode, \
2057 target_core_alua_lu_gp_show_attr_##_name, \
2058 target_core_alua_lu_gp_store_attr_##_name);
2059
2060 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2061 static struct target_core_alua_lu_gp_attribute \
2062 target_core_alua_lu_gp_##_name = \
2063 __CONFIGFS_EATTR_RO(_name, \
2064 target_core_alua_lu_gp_show_attr_##_name);
2065
2066 /*
2067 * lu_gp_id
2068 */
2069 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2070 struct t10_alua_lu_gp *lu_gp,
2071 char *page)
2072 {
2073 if (!(lu_gp->lu_gp_valid_id))
2074 return 0;
2075
2076 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2077 }
2078
2079 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2080 struct t10_alua_lu_gp *lu_gp,
2081 const char *page,
2082 size_t count)
2083 {
2084 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2085 unsigned long lu_gp_id;
2086 int ret;
2087
2088 ret = strict_strtoul(page, 0, &lu_gp_id);
2089 if (ret < 0) {
2090 printk(KERN_ERR "strict_strtoul() returned %d for"
2091 " lu_gp_id\n", ret);
2092 return -EINVAL;
2093 }
2094 if (lu_gp_id > 0x0000ffff) {
2095 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2096 " 0x0000ffff\n", lu_gp_id);
2097 return -EINVAL;
2098 }
2099
2100 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2101 if (ret < 0)
2102 return -EINVAL;
2103
2104 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2105 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2106 config_item_name(&alua_lu_gp_cg->cg_item),
2107 lu_gp->lu_gp_id);
2108
2109 return count;
2110 }
2111
2112 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2113
2114 /*
2115 * members
2116 */
2117 static ssize_t target_core_alua_lu_gp_show_attr_members(
2118 struct t10_alua_lu_gp *lu_gp,
2119 char *page)
2120 {
2121 struct se_device *dev;
2122 struct se_hba *hba;
2123 struct se_subsystem_dev *su_dev;
2124 struct t10_alua_lu_gp_member *lu_gp_mem;
2125 ssize_t len = 0, cur_len;
2126 unsigned char buf[LU_GROUP_NAME_BUF];
2127
2128 memset(buf, 0, LU_GROUP_NAME_BUF);
2129
2130 spin_lock(&lu_gp->lu_gp_lock);
2131 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2132 dev = lu_gp_mem->lu_gp_mem_dev;
2133 su_dev = dev->se_sub_dev;
2134 hba = su_dev->se_dev_hba;
2135
2136 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2137 config_item_name(&hba->hba_group.cg_item),
2138 config_item_name(&su_dev->se_dev_group.cg_item));
2139 cur_len++; /* Extra byte for NULL terminator */
2140
2141 if ((cur_len + len) > PAGE_SIZE) {
2142 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2143 "_members buffer\n");
2144 break;
2145 }
2146 memcpy(page+len, buf, cur_len);
2147 len += cur_len;
2148 }
2149 spin_unlock(&lu_gp->lu_gp_lock);
2150
2151 return len;
2152 }
2153
2154 SE_DEV_ALUA_LU_ATTR_RO(members);
2155
2156 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2157
2158 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2159 &target_core_alua_lu_gp_lu_gp_id.attr,
2160 &target_core_alua_lu_gp_members.attr,
2161 NULL,
2162 };
2163
2164 static void target_core_alua_lu_gp_release(struct config_item *item)
2165 {
2166 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2167 struct t10_alua_lu_gp, lu_gp_group);
2168
2169 core_alua_free_lu_gp(lu_gp);
2170 }
2171
2172 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2173 .release = target_core_alua_lu_gp_release,
2174 .show_attribute = target_core_alua_lu_gp_attr_show,
2175 .store_attribute = target_core_alua_lu_gp_attr_store,
2176 };
2177
2178 static struct config_item_type target_core_alua_lu_gp_cit = {
2179 .ct_item_ops = &target_core_alua_lu_gp_ops,
2180 .ct_attrs = target_core_alua_lu_gp_attrs,
2181 .ct_owner = THIS_MODULE,
2182 };
2183
2184 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2185
2186 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2187
2188 static struct config_group *target_core_alua_create_lu_gp(
2189 struct config_group *group,
2190 const char *name)
2191 {
2192 struct t10_alua_lu_gp *lu_gp;
2193 struct config_group *alua_lu_gp_cg = NULL;
2194 struct config_item *alua_lu_gp_ci = NULL;
2195
2196 lu_gp = core_alua_allocate_lu_gp(name, 0);
2197 if (IS_ERR(lu_gp))
2198 return NULL;
2199
2200 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2201 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2202
2203 config_group_init_type_name(alua_lu_gp_cg, name,
2204 &target_core_alua_lu_gp_cit);
2205
2206 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2207 " Group: core/alua/lu_gps/%s\n",
2208 config_item_name(alua_lu_gp_ci));
2209
2210 return alua_lu_gp_cg;
2211
2212 }
2213
2214 static void target_core_alua_drop_lu_gp(
2215 struct config_group *group,
2216 struct config_item *item)
2217 {
2218 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2219 struct t10_alua_lu_gp, lu_gp_group);
2220
2221 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2222 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2223 config_item_name(item), lu_gp->lu_gp_id);
2224 /*
2225 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2226 * -> target_core_alua_lu_gp_release()
2227 */
2228 config_item_put(item);
2229 }
2230
2231 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2232 .make_group = &target_core_alua_create_lu_gp,
2233 .drop_item = &target_core_alua_drop_lu_gp,
2234 };
2235
2236 static struct config_item_type target_core_alua_lu_gps_cit = {
2237 .ct_item_ops = NULL,
2238 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2239 .ct_owner = THIS_MODULE,
2240 };
2241
2242 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2243
2244 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2245
2246 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2247 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2248 static struct target_core_alua_tg_pt_gp_attribute \
2249 target_core_alua_tg_pt_gp_##_name = \
2250 __CONFIGFS_EATTR(_name, _mode, \
2251 target_core_alua_tg_pt_gp_show_attr_##_name, \
2252 target_core_alua_tg_pt_gp_store_attr_##_name);
2253
2254 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2255 static struct target_core_alua_tg_pt_gp_attribute \
2256 target_core_alua_tg_pt_gp_##_name = \
2257 __CONFIGFS_EATTR_RO(_name, \
2258 target_core_alua_tg_pt_gp_show_attr_##_name);
2259
2260 /*
2261 * alua_access_state
2262 */
2263 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2264 struct t10_alua_tg_pt_gp *tg_pt_gp,
2265 char *page)
2266 {
2267 return sprintf(page, "%d\n",
2268 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2269 }
2270
2271 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2272 struct t10_alua_tg_pt_gp *tg_pt_gp,
2273 const char *page,
2274 size_t count)
2275 {
2276 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2277 unsigned long tmp;
2278 int new_state, ret;
2279
2280 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2281 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2282 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2283 return -EINVAL;
2284 }
2285
2286 ret = strict_strtoul(page, 0, &tmp);
2287 if (ret < 0) {
2288 printk("Unable to extract new ALUA access state from"
2289 " %s\n", page);
2290 return -EINVAL;
2291 }
2292 new_state = (int)tmp;
2293
2294 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2295 printk(KERN_ERR "Unable to process implict configfs ALUA"
2296 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2297 return -EINVAL;
2298 }
2299
2300 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2301 NULL, NULL, new_state, 0);
2302 return (!ret) ? count : -EINVAL;
2303 }
2304
2305 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2306
2307 /*
2308 * alua_access_status
2309 */
2310 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2311 struct t10_alua_tg_pt_gp *tg_pt_gp,
2312 char *page)
2313 {
2314 return sprintf(page, "%s\n",
2315 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2316 }
2317
2318 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2319 struct t10_alua_tg_pt_gp *tg_pt_gp,
2320 const char *page,
2321 size_t count)
2322 {
2323 unsigned long tmp;
2324 int new_status, ret;
2325
2326 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2327 printk(KERN_ERR "Unable to do set ALUA access status on non"
2328 " valid tg_pt_gp ID: %hu\n",
2329 tg_pt_gp->tg_pt_gp_valid_id);
2330 return -EINVAL;
2331 }
2332
2333 ret = strict_strtoul(page, 0, &tmp);
2334 if (ret < 0) {
2335 printk(KERN_ERR "Unable to extract new ALUA access status"
2336 " from %s\n", page);
2337 return -EINVAL;
2338 }
2339 new_status = (int)tmp;
2340
2341 if ((new_status != ALUA_STATUS_NONE) &&
2342 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2343 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2344 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2345 new_status);
2346 return -EINVAL;
2347 }
2348
2349 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2350 return count;
2351 }
2352
2353 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2354
2355 /*
2356 * alua_access_type
2357 */
2358 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2359 struct t10_alua_tg_pt_gp *tg_pt_gp,
2360 char *page)
2361 {
2362 return core_alua_show_access_type(tg_pt_gp, page);
2363 }
2364
2365 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2366 struct t10_alua_tg_pt_gp *tg_pt_gp,
2367 const char *page,
2368 size_t count)
2369 {
2370 return core_alua_store_access_type(tg_pt_gp, page, count);
2371 }
2372
2373 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2374
2375 /*
2376 * alua_write_metadata
2377 */
2378 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2379 struct t10_alua_tg_pt_gp *tg_pt_gp,
2380 char *page)
2381 {
2382 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2383 }
2384
2385 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2386 struct t10_alua_tg_pt_gp *tg_pt_gp,
2387 const char *page,
2388 size_t count)
2389 {
2390 unsigned long tmp;
2391 int ret;
2392
2393 ret = strict_strtoul(page, 0, &tmp);
2394 if (ret < 0) {
2395 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2396 return -EINVAL;
2397 }
2398
2399 if ((tmp != 0) && (tmp != 1)) {
2400 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2401 " %lu\n", tmp);
2402 return -EINVAL;
2403 }
2404 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2405
2406 return count;
2407 }
2408
2409 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2410
2411
2412
2413 /*
2414 * nonop_delay_msecs
2415 */
2416 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2417 struct t10_alua_tg_pt_gp *tg_pt_gp,
2418 char *page)
2419 {
2420 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2421
2422 }
2423
2424 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2425 struct t10_alua_tg_pt_gp *tg_pt_gp,
2426 const char *page,
2427 size_t count)
2428 {
2429 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2430 }
2431
2432 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2433
2434 /*
2435 * trans_delay_msecs
2436 */
2437 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2438 struct t10_alua_tg_pt_gp *tg_pt_gp,
2439 char *page)
2440 {
2441 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2442 }
2443
2444 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2445 struct t10_alua_tg_pt_gp *tg_pt_gp,
2446 const char *page,
2447 size_t count)
2448 {
2449 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2450 }
2451
2452 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2453
2454 /*
2455 * preferred
2456 */
2457
2458 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2459 struct t10_alua_tg_pt_gp *tg_pt_gp,
2460 char *page)
2461 {
2462 return core_alua_show_preferred_bit(tg_pt_gp, page);
2463 }
2464
2465 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2466 struct t10_alua_tg_pt_gp *tg_pt_gp,
2467 const char *page,
2468 size_t count)
2469 {
2470 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2471 }
2472
2473 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2474
2475 /*
2476 * tg_pt_gp_id
2477 */
2478 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2479 struct t10_alua_tg_pt_gp *tg_pt_gp,
2480 char *page)
2481 {
2482 if (!(tg_pt_gp->tg_pt_gp_valid_id))
2483 return 0;
2484
2485 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2486 }
2487
2488 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2489 struct t10_alua_tg_pt_gp *tg_pt_gp,
2490 const char *page,
2491 size_t count)
2492 {
2493 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2494 unsigned long tg_pt_gp_id;
2495 int ret;
2496
2497 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2498 if (ret < 0) {
2499 printk(KERN_ERR "strict_strtoul() returned %d for"
2500 " tg_pt_gp_id\n", ret);
2501 return -EINVAL;
2502 }
2503 if (tg_pt_gp_id > 0x0000ffff) {
2504 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2505 " 0x0000ffff\n", tg_pt_gp_id);
2506 return -EINVAL;
2507 }
2508
2509 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2510 if (ret < 0)
2511 return -EINVAL;
2512
2513 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2514 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2515 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2516 tg_pt_gp->tg_pt_gp_id);
2517
2518 return count;
2519 }
2520
2521 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2522
2523 /*
2524 * members
2525 */
2526 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2527 struct t10_alua_tg_pt_gp *tg_pt_gp,
2528 char *page)
2529 {
2530 struct se_port *port;
2531 struct se_portal_group *tpg;
2532 struct se_lun *lun;
2533 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2534 ssize_t len = 0, cur_len;
2535 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2536
2537 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2538
2539 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2540 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2541 tg_pt_gp_mem_list) {
2542 port = tg_pt_gp_mem->tg_pt;
2543 tpg = port->sep_tpg;
2544 lun = port->sep_lun;
2545
2546 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2547 "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2548 TPG_TFO(tpg)->tpg_get_wwn(tpg),
2549 TPG_TFO(tpg)->tpg_get_tag(tpg),
2550 config_item_name(&lun->lun_group.cg_item));
2551 cur_len++; /* Extra byte for NULL terminator */
2552
2553 if ((cur_len + len) > PAGE_SIZE) {
2554 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2555 "_members buffer\n");
2556 break;
2557 }
2558 memcpy(page+len, buf, cur_len);
2559 len += cur_len;
2560 }
2561 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2562
2563 return len;
2564 }
2565
2566 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2567
2568 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2569 tg_pt_gp_group);
2570
2571 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2572 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2573 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2574 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2575 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2576 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2577 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2578 &target_core_alua_tg_pt_gp_preferred.attr,
2579 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2580 &target_core_alua_tg_pt_gp_members.attr,
2581 NULL,
2582 };
2583
2584 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2585 {
2586 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2587 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2588
2589 core_alua_free_tg_pt_gp(tg_pt_gp);
2590 }
2591
2592 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2593 .release = target_core_alua_tg_pt_gp_release,
2594 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2595 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2596 };
2597
2598 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2599 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2600 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2601 .ct_owner = THIS_MODULE,
2602 };
2603
2604 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2605
2606 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2607
2608 static struct config_group *target_core_alua_create_tg_pt_gp(
2609 struct config_group *group,
2610 const char *name)
2611 {
2612 struct t10_alua *alua = container_of(group, struct t10_alua,
2613 alua_tg_pt_gps_group);
2614 struct t10_alua_tg_pt_gp *tg_pt_gp;
2615 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2616 struct config_group *alua_tg_pt_gp_cg = NULL;
2617 struct config_item *alua_tg_pt_gp_ci = NULL;
2618
2619 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2620 if (!(tg_pt_gp))
2621 return NULL;
2622
2623 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2624 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2625
2626 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2627 &target_core_alua_tg_pt_gp_cit);
2628
2629 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2630 " Group: alua/tg_pt_gps/%s\n",
2631 config_item_name(alua_tg_pt_gp_ci));
2632
2633 return alua_tg_pt_gp_cg;
2634 }
2635
2636 static void target_core_alua_drop_tg_pt_gp(
2637 struct config_group *group,
2638 struct config_item *item)
2639 {
2640 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2641 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2642
2643 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2644 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2645 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2646 /*
2647 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2648 * -> target_core_alua_tg_pt_gp_release().
2649 */
2650 config_item_put(item);
2651 }
2652
2653 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2654 .make_group = &target_core_alua_create_tg_pt_gp,
2655 .drop_item = &target_core_alua_drop_tg_pt_gp,
2656 };
2657
2658 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2659 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2660 .ct_owner = THIS_MODULE,
2661 };
2662
2663 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2664
2665 /* Start functions for struct config_item_type target_core_alua_cit */
2666
2667 /*
2668 * target_core_alua_cit is a ConfigFS group that lives under
2669 * /sys/kernel/config/target/core/alua. There are default groups
2670 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2671 * target_core_alua_cit in target_core_init_configfs() below.
2672 */
2673 static struct config_item_type target_core_alua_cit = {
2674 .ct_item_ops = NULL,
2675 .ct_attrs = NULL,
2676 .ct_owner = THIS_MODULE,
2677 };
2678
2679 /* End functions for struct config_item_type target_core_alua_cit */
2680
2681 /* Start functions for struct config_item_type target_core_hba_cit */
2682
2683 static struct config_group *target_core_make_subdev(
2684 struct config_group *group,
2685 const char *name)
2686 {
2687 struct t10_alua_tg_pt_gp *tg_pt_gp;
2688 struct se_subsystem_dev *se_dev;
2689 struct se_subsystem_api *t;
2690 struct config_item *hba_ci = &group->cg_item;
2691 struct se_hba *hba = item_to_hba(hba_ci);
2692 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2693
2694 if (mutex_lock_interruptible(&hba->hba_access_mutex))
2695 return NULL;
2696
2697 /*
2698 * Locate the struct se_subsystem_api from parent's struct se_hba.
2699 */
2700 t = hba->transport;
2701
2702 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2703 if (!se_dev) {
2704 printk(KERN_ERR "Unable to allocate memory for"
2705 " struct se_subsystem_dev\n");
2706 goto unlock;
2707 }
2708 INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2709 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2710 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2711 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2712 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2713 spin_lock_init(&se_dev->t10_reservation.registration_lock);
2714 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2715 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2716 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2717 spin_lock_init(&se_dev->se_dev_lock);
2718 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2719 se_dev->t10_wwn.t10_sub_dev = se_dev;
2720 se_dev->t10_alua.t10_sub_dev = se_dev;
2721 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2722
2723 se_dev->se_dev_hba = hba;
2724 dev_cg = &se_dev->se_dev_group;
2725
2726 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
2727 GFP_KERNEL);
2728 if (!(dev_cg->default_groups))
2729 goto out;
2730 /*
2731 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2732 * for ->allocate_virtdevice()
2733 *
2734 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2735 * has been called successfully in the next level up in the
2736 * configfs tree for device object's struct config_group.
2737 */
2738 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2739 if (!(se_dev->se_dev_su_ptr)) {
2740 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2741 " from allocate_virtdevice()\n");
2742 goto out;
2743 }
2744 spin_lock(&se_global->g_device_lock);
2745 list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2746 spin_unlock(&se_global->g_device_lock);
2747
2748 config_group_init_type_name(&se_dev->se_dev_group, name,
2749 &target_core_dev_cit);
2750 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2751 &target_core_dev_attrib_cit);
2752 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2753 &target_core_dev_pr_cit);
2754 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2755 &target_core_dev_wwn_cit);
2756 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2757 "alua", &target_core_alua_tg_pt_gps_cit);
2758 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2759 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2760 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2761 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2762 dev_cg->default_groups[4] = NULL;
2763 /*
2764 * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp
2765 */
2766 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2767 if (!(tg_pt_gp))
2768 goto out;
2769
2770 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2771 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2772 GFP_KERNEL);
2773 if (!(tg_pt_gp_cg->default_groups)) {
2774 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2775 "default_groups\n");
2776 goto out;
2777 }
2778
2779 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2780 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2781 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2782 tg_pt_gp_cg->default_groups[1] = NULL;
2783 T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2784
2785 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2786 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2787
2788 mutex_unlock(&hba->hba_access_mutex);
2789 return &se_dev->se_dev_group;
2790 out:
2791 if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2792 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2793 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2794 }
2795 if (tg_pt_gp_cg)
2796 kfree(tg_pt_gp_cg->default_groups);
2797 if (dev_cg)
2798 kfree(dev_cg->default_groups);
2799 if (se_dev->se_dev_su_ptr)
2800 t->free_device(se_dev->se_dev_su_ptr);
2801 kfree(se_dev);
2802 unlock:
2803 mutex_unlock(&hba->hba_access_mutex);
2804 return NULL;
2805 }
2806
2807 static void target_core_drop_subdev(
2808 struct config_group *group,
2809 struct config_item *item)
2810 {
2811 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2812 struct se_subsystem_dev, se_dev_group);
2813 struct se_hba *hba;
2814 struct se_subsystem_api *t;
2815 struct config_item *df_item;
2816 struct config_group *dev_cg, *tg_pt_gp_cg;
2817 int i;
2818
2819 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2820
2821 mutex_lock(&hba->hba_access_mutex);
2822 t = hba->transport;
2823
2824 spin_lock(&se_global->g_device_lock);
2825 list_del(&se_dev->g_se_dev_list);
2826 spin_unlock(&se_global->g_device_lock);
2827
2828 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2829 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2830 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2831 tg_pt_gp_cg->default_groups[i] = NULL;
2832 config_item_put(df_item);
2833 }
2834 kfree(tg_pt_gp_cg->default_groups);
2835 /*
2836 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2837 * directly from target_core_alua_tg_pt_gp_release().
2838 */
2839 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2840
2841 dev_cg = &se_dev->se_dev_group;
2842 for (i = 0; dev_cg->default_groups[i]; i++) {
2843 df_item = &dev_cg->default_groups[i]->cg_item;
2844 dev_cg->default_groups[i] = NULL;
2845 config_item_put(df_item);
2846 }
2847 /*
2848 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2849 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2850 */
2851 config_item_put(item);
2852 mutex_unlock(&hba->hba_access_mutex);
2853 }
2854
2855 static struct configfs_group_operations target_core_hba_group_ops = {
2856 .make_group = target_core_make_subdev,
2857 .drop_item = target_core_drop_subdev,
2858 };
2859
2860 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2861 #define SE_HBA_ATTR(_name, _mode) \
2862 static struct target_core_hba_attribute \
2863 target_core_hba_##_name = \
2864 __CONFIGFS_EATTR(_name, _mode, \
2865 target_core_hba_show_attr_##_name, \
2866 target_core_hba_store_attr_##_name);
2867
2868 #define SE_HBA_ATTR_RO(_name) \
2869 static struct target_core_hba_attribute \
2870 target_core_hba_##_name = \
2871 __CONFIGFS_EATTR_RO(_name, \
2872 target_core_hba_show_attr_##_name);
2873
2874 static ssize_t target_core_hba_show_attr_hba_info(
2875 struct se_hba *hba,
2876 char *page)
2877 {
2878 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2879 hba->hba_id, hba->transport->name,
2880 TARGET_CORE_CONFIGFS_VERSION);
2881 }
2882
2883 SE_HBA_ATTR_RO(hba_info);
2884
2885 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2886 char *page)
2887 {
2888 int hba_mode = 0;
2889
2890 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2891 hba_mode = 1;
2892
2893 return sprintf(page, "%d\n", hba_mode);
2894 }
2895
2896 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2897 const char *page, size_t count)
2898 {
2899 struct se_subsystem_api *transport = hba->transport;
2900 unsigned long mode_flag;
2901 int ret;
2902
2903 if (transport->pmode_enable_hba == NULL)
2904 return -EINVAL;
2905
2906 ret = strict_strtoul(page, 0, &mode_flag);
2907 if (ret < 0) {
2908 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2909 return -EINVAL;
2910 }
2911
2912 spin_lock(&hba->device_lock);
2913 if (!(list_empty(&hba->hba_dev_list))) {
2914 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2915 spin_unlock(&hba->device_lock);
2916 return -EINVAL;
2917 }
2918 spin_unlock(&hba->device_lock);
2919
2920 ret = transport->pmode_enable_hba(hba, mode_flag);
2921 if (ret < 0)
2922 return -EINVAL;
2923 if (ret > 0)
2924 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2925 else if (ret == 0)
2926 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2927
2928 return count;
2929 }
2930
2931 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2932
2933 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2934
2935 static void target_core_hba_release(struct config_item *item)
2936 {
2937 struct se_hba *hba = container_of(to_config_group(item),
2938 struct se_hba, hba_group);
2939 core_delete_hba(hba);
2940 }
2941
2942 static struct configfs_attribute *target_core_hba_attrs[] = {
2943 &target_core_hba_hba_info.attr,
2944 &target_core_hba_hba_mode.attr,
2945 NULL,
2946 };
2947
2948 static struct configfs_item_operations target_core_hba_item_ops = {
2949 .release = target_core_hba_release,
2950 .show_attribute = target_core_hba_attr_show,
2951 .store_attribute = target_core_hba_attr_store,
2952 };
2953
2954 static struct config_item_type target_core_hba_cit = {
2955 .ct_item_ops = &target_core_hba_item_ops,
2956 .ct_group_ops = &target_core_hba_group_ops,
2957 .ct_attrs = target_core_hba_attrs,
2958 .ct_owner = THIS_MODULE,
2959 };
2960
2961 static struct config_group *target_core_call_addhbatotarget(
2962 struct config_group *group,
2963 const char *name)
2964 {
2965 char *se_plugin_str, *str, *str2;
2966 struct se_hba *hba;
2967 char buf[TARGET_CORE_NAME_MAX_LEN];
2968 unsigned long plugin_dep_id = 0;
2969 int ret;
2970
2971 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2972 if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
2973 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
2974 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2975 TARGET_CORE_NAME_MAX_LEN);
2976 return ERR_PTR(-ENAMETOOLONG);
2977 }
2978 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2979
2980 str = strstr(buf, "_");
2981 if (!(str)) {
2982 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2983 return ERR_PTR(-EINVAL);
2984 }
2985 se_plugin_str = buf;
2986 /*
2987 * Special case for subsystem plugins that have "_" in their names.
2988 * Namely rd_direct and rd_mcp..
2989 */
2990 str2 = strstr(str+1, "_");
2991 if ((str2)) {
2992 *str2 = '\0'; /* Terminate for *se_plugin_str */
2993 str2++; /* Skip to start of plugin dependent ID */
2994 str = str2;
2995 } else {
2996 *str = '\0'; /* Terminate for *se_plugin_str */
2997 str++; /* Skip to start of plugin dependent ID */
2998 }
2999
3000 ret = strict_strtoul(str, 0, &plugin_dep_id);
3001 if (ret < 0) {
3002 printk(KERN_ERR "strict_strtoul() returned %d for"
3003 " plugin_dep_id\n", ret);
3004 return ERR_PTR(-EINVAL);
3005 }
3006 /*
3007 * Load up TCM subsystem plugins if they have not already been loaded.
3008 */
3009 if (transport_subsystem_check_init() < 0)
3010 return ERR_PTR(-EINVAL);
3011
3012 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3013 if (IS_ERR(hba))
3014 return ERR_CAST(hba);
3015
3016 config_group_init_type_name(&hba->hba_group, name,
3017 &target_core_hba_cit);
3018
3019 return &hba->hba_group;
3020 }
3021
3022 static void target_core_call_delhbafromtarget(
3023 struct config_group *group,
3024 struct config_item *item)
3025 {
3026 /*
3027 * core_delete_hba() is called from target_core_hba_item_ops->release()
3028 * -> target_core_hba_release()
3029 */
3030 config_item_put(item);
3031 }
3032
3033 static struct configfs_group_operations target_core_group_ops = {
3034 .make_group = target_core_call_addhbatotarget,
3035 .drop_item = target_core_call_delhbafromtarget,
3036 };
3037
3038 static struct config_item_type target_core_cit = {
3039 .ct_item_ops = NULL,
3040 .ct_group_ops = &target_core_group_ops,
3041 .ct_attrs = NULL,
3042 .ct_owner = THIS_MODULE,
3043 };
3044
3045 /* Stop functions for struct config_item_type target_core_hba_cit */
3046
3047 static int target_core_init_configfs(void)
3048 {
3049 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3050 struct config_group *lu_gp_cg = NULL;
3051 struct configfs_subsystem *subsys;
3052 struct t10_alua_lu_gp *lu_gp;
3053 int ret;
3054
3055 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3056 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3057 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3058
3059 subsys = target_core_subsystem[0];
3060 config_group_init(&subsys->su_group);
3061 mutex_init(&subsys->su_mutex);
3062
3063 INIT_LIST_HEAD(&g_tf_list);
3064 mutex_init(&g_tf_lock);
3065 init_scsi_index_table();
3066 ret = init_se_global();
3067 if (ret < 0)
3068 return -1;
3069 /*
3070 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3071 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3072 */
3073 target_cg = &subsys->su_group;
3074 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3075 GFP_KERNEL);
3076 if (!(target_cg->default_groups)) {
3077 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3078 goto out_global;
3079 }
3080
3081 config_group_init_type_name(&se_global->target_core_hbagroup,
3082 "core", &target_core_cit);
3083 target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3084 target_cg->default_groups[1] = NULL;
3085 /*
3086 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3087 */
3088 hba_cg = &se_global->target_core_hbagroup;
3089 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3090 GFP_KERNEL);
3091 if (!(hba_cg->default_groups)) {
3092 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3093 goto out_global;
3094 }
3095 config_group_init_type_name(&se_global->alua_group,
3096 "alua", &target_core_alua_cit);
3097 hba_cg->default_groups[0] = &se_global->alua_group;
3098 hba_cg->default_groups[1] = NULL;
3099 /*
3100 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3101 * groups under /sys/kernel/config/target/core/alua/
3102 */
3103 alua_cg = &se_global->alua_group;
3104 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3105 GFP_KERNEL);
3106 if (!(alua_cg->default_groups)) {
3107 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3108 goto out_global;
3109 }
3110
3111 config_group_init_type_name(&se_global->alua_lu_gps_group,
3112 "lu_gps", &target_core_alua_lu_gps_cit);
3113 alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3114 alua_cg->default_groups[1] = NULL;
3115 /*
3116 * Add core/alua/lu_gps/default_lu_gp
3117 */
3118 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3119 if (IS_ERR(lu_gp))
3120 goto out_global;
3121
3122 lu_gp_cg = &se_global->alua_lu_gps_group;
3123 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3124 GFP_KERNEL);
3125 if (!(lu_gp_cg->default_groups)) {
3126 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3127 goto out_global;
3128 }
3129
3130 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3131 &target_core_alua_lu_gp_cit);
3132 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3133 lu_gp_cg->default_groups[1] = NULL;
3134 se_global->default_lu_gp = lu_gp;
3135 /*
3136 * Register the target_core_mod subsystem with configfs.
3137 */
3138 ret = configfs_register_subsystem(subsys);
3139 if (ret < 0) {
3140 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3141 ret, subsys->su_group.cg_item.ci_namebuf);
3142 goto out_global;
3143 }
3144 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3145 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3146 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3147 /*
3148 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3149 */
3150 ret = rd_module_init();
3151 if (ret < 0)
3152 goto out;
3153
3154 if (core_dev_setup_virtual_lun0() < 0)
3155 goto out;
3156
3157 return 0;
3158
3159 out:
3160 configfs_unregister_subsystem(subsys);
3161 core_dev_release_virtual_lun0();
3162 rd_module_exit();
3163 out_global:
3164 if (se_global->default_lu_gp) {
3165 core_alua_free_lu_gp(se_global->default_lu_gp);
3166 se_global->default_lu_gp = NULL;
3167 }
3168 if (lu_gp_cg)
3169 kfree(lu_gp_cg->default_groups);
3170 if (alua_cg)
3171 kfree(alua_cg->default_groups);
3172 if (hba_cg)
3173 kfree(hba_cg->default_groups);
3174 kfree(target_cg->default_groups);
3175 release_se_global();
3176 return -1;
3177 }
3178
3179 static void target_core_exit_configfs(void)
3180 {
3181 struct configfs_subsystem *subsys;
3182 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3183 struct config_item *item;
3184 int i;
3185
3186 se_global->in_shutdown = 1;
3187 subsys = target_core_subsystem[0];
3188
3189 lu_gp_cg = &se_global->alua_lu_gps_group;
3190 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3191 item = &lu_gp_cg->default_groups[i]->cg_item;
3192 lu_gp_cg->default_groups[i] = NULL;
3193 config_item_put(item);
3194 }
3195 kfree(lu_gp_cg->default_groups);
3196 lu_gp_cg->default_groups = NULL;
3197
3198 alua_cg = &se_global->alua_group;
3199 for (i = 0; alua_cg->default_groups[i]; i++) {
3200 item = &alua_cg->default_groups[i]->cg_item;
3201 alua_cg->default_groups[i] = NULL;
3202 config_item_put(item);
3203 }
3204 kfree(alua_cg->default_groups);
3205 alua_cg->default_groups = NULL;
3206
3207 hba_cg = &se_global->target_core_hbagroup;
3208 for (i = 0; hba_cg->default_groups[i]; i++) {
3209 item = &hba_cg->default_groups[i]->cg_item;
3210 hba_cg->default_groups[i] = NULL;
3211 config_item_put(item);
3212 }
3213 kfree(hba_cg->default_groups);
3214 hba_cg->default_groups = NULL;
3215 /*
3216 * We expect subsys->su_group.default_groups to be released
3217 * by configfs subsystem provider logic..
3218 */
3219 configfs_unregister_subsystem(subsys);
3220 kfree(subsys->su_group.default_groups);
3221
3222 core_alua_free_lu_gp(se_global->default_lu_gp);
3223 se_global->default_lu_gp = NULL;
3224
3225 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3226 " Infrastructure\n");
3227
3228 core_dev_release_virtual_lun0();
3229 rd_module_exit();
3230 release_se_global();
3231
3232 return;
3233 }
3234
3235 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3236 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3237 MODULE_LICENSE("GPL");
3238
3239 module_init(target_core_init_configfs);
3240 module_exit(target_core_exit_configfs);
CRIS linux kernel tree