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[zen-stable.git] / drivers / target / target_core_configfs.c
bloba5f44a6e6e1d62286ef81228cf4d014b3be03a9d
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <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 #include "target_core_stat.h"
54
55 static struct list_head g_tf_list;
56 static struct mutex g_tf_lock;
57
58 struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62 };
63
64 static inline struct se_hba *
65 item_to_hba(struct config_item *item)
66 {
67 return container_of(to_config_group(item), struct se_hba, hba_group);
68 }
69
70 /*
71 * Attributes for /sys/kernel/config/target/
72 */
73 static ssize_t target_core_attr_show(struct config_item *item,
74 struct configfs_attribute *attr,
75 char *page)
76 {
77 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
78 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
79 utsname()->sysname, utsname()->machine);
80 }
81
82 static struct configfs_item_operations target_core_fabric_item_ops = {
83 .show_attribute = target_core_attr_show,
84 };
85
86 static struct configfs_attribute target_core_item_attr_version = {
87 .ca_owner = THIS_MODULE,
88 .ca_name = "version",
89 .ca_mode = S_IRUGO,
90 };
91
92 static struct target_fabric_configfs *target_core_get_fabric(
93 const char *name)
94 {
95 struct target_fabric_configfs *tf;
96
97 if (!(name))
98 return NULL;
99
100 mutex_lock(&g_tf_lock);
101 list_for_each_entry(tf, &g_tf_list, tf_list) {
102 if (!(strcmp(tf->tf_name, name))) {
103 atomic_inc(&tf->tf_access_cnt);
104 mutex_unlock(&g_tf_lock);
105 return tf;
106 }
107 }
108 mutex_unlock(&g_tf_lock);
109
110 return NULL;
111 }
112
113 /*
114 * Called from struct target_core_group_ops->make_group()
115 */
116 static struct config_group *target_core_register_fabric(
117 struct config_group *group,
118 const char *name)
119 {
120 struct target_fabric_configfs *tf;
121 int ret;
122
123 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
124 " %s\n", group, name);
125 /*
126 * Ensure that TCM subsystem plugins are loaded at this point for
127 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
128 * LUN symlinks.
129 */
130 if (transport_subsystem_check_init() < 0)
131 return ERR_PTR(-EINVAL);
132
133 /*
134 * Below are some hardcoded request_module() calls to automatically
135 * local fabric modules when the following is called:
136 *
137 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
138 *
139 * Note that this does not limit which TCM fabric module can be
140 * registered, but simply provids auto loading logic for modules with
141 * mkdir(2) system calls with known TCM fabric modules.
142 */
143 if (!(strncmp(name, "iscsi", 5))) {
144 /*
145 * Automatically load the LIO Target fabric module when the
146 * following is called:
147 *
148 * mkdir -p $CONFIGFS/target/iscsi
149 */
150 ret = request_module("iscsi_target_mod");
151 if (ret < 0) {
152 printk(KERN_ERR "request_module() failed for"
153 " iscsi_target_mod.ko: %d\n", ret);
154 return ERR_PTR(-EINVAL);
155 }
156 } else if (!(strncmp(name, "loopback", 8))) {
157 /*
158 * Automatically load the tcm_loop fabric module when the
159 * following is called:
160 *
161 * mkdir -p $CONFIGFS/target/loopback
162 */
163 ret = request_module("tcm_loop");
164 if (ret < 0) {
165 printk(KERN_ERR "request_module() failed for"
166 " tcm_loop.ko: %d\n", ret);
167 return ERR_PTR(-EINVAL);
168 }
169 }
170
171 tf = target_core_get_fabric(name);
172 if (!(tf)) {
173 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
174 name);
175 return ERR_PTR(-EINVAL);
176 }
177 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
178 " %s\n", tf->tf_name);
179 /*
180 * On a successful target_core_get_fabric() look, the returned
181 * struct target_fabric_configfs *tf will contain a usage reference.
182 */
183 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
184 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
185
186 tf->tf_group.default_groups = tf->tf_default_groups;
187 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
188 tf->tf_group.default_groups[1] = NULL;
189
190 config_group_init_type_name(&tf->tf_group, name,
191 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
192 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
193 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
194
195 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
196 " %s\n", tf->tf_group.cg_item.ci_name);
197 /*
198 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
199 */
200 tf->tf_ops.tf_subsys = tf->tf_subsys;
201 tf->tf_fabric = &tf->tf_group.cg_item;
202 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
203 " for %s\n", name);
204
205 return &tf->tf_group;
206 }
207
208 /*
209 * Called from struct target_core_group_ops->drop_item()
210 */
211 static void target_core_deregister_fabric(
212 struct config_group *group,
213 struct config_item *item)
214 {
215 struct target_fabric_configfs *tf = container_of(
216 to_config_group(item), struct target_fabric_configfs, tf_group);
217 struct config_group *tf_group;
218 struct config_item *df_item;
219 int i;
220
221 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
222 " tf list\n", config_item_name(item));
223
224 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
225 " %s\n", tf->tf_name);
226 atomic_dec(&tf->tf_access_cnt);
227
228 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
229 " tf->tf_fabric for %s\n", tf->tf_name);
230 tf->tf_fabric = NULL;
231
232 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
233 " %s\n", config_item_name(item));
234
235 tf_group = &tf->tf_group;
236 for (i = 0; tf_group->default_groups[i]; i++) {
237 df_item = &tf_group->default_groups[i]->cg_item;
238 tf_group->default_groups[i] = NULL;
239 config_item_put(df_item);
240 }
241 config_item_put(item);
242 }
243
244 static struct configfs_group_operations target_core_fabric_group_ops = {
245 .make_group = &target_core_register_fabric,
246 .drop_item = &target_core_deregister_fabric,
247 };
248
249 /*
250 * All item attributes appearing in /sys/kernel/target/ appear here.
251 */
252 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
253 &target_core_item_attr_version,
254 NULL,
255 };
256
257 /*
258 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
259 */
260 static struct config_item_type target_core_fabrics_item = {
261 .ct_item_ops = &target_core_fabric_item_ops,
262 .ct_group_ops = &target_core_fabric_group_ops,
263 .ct_attrs = target_core_fabric_item_attrs,
264 .ct_owner = THIS_MODULE,
265 };
266
267 static struct configfs_subsystem target_core_fabrics = {
268 .su_group = {
269 .cg_item = {
270 .ci_namebuf = "target",
271 .ci_type = &target_core_fabrics_item,
272 },
273 },
274 };
275
276 static struct configfs_subsystem *target_core_subsystem[] = {
277 &target_core_fabrics,
278 NULL,
279 };
280
281 /*##############################################################################
282 // Start functions called by external Target Fabrics Modules
283 //############################################################################*/
284
285 /*
286 * First function called by fabric modules to:
287 *
288 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
289 * 2) Add struct target_fabric_configfs to g_tf_list
290 * 3) Return struct target_fabric_configfs to fabric module to be passed
291 * into target_fabric_configfs_register().
292 */
293 struct target_fabric_configfs *target_fabric_configfs_init(
294 struct module *fabric_mod,
295 const char *name)
296 {
297 struct target_fabric_configfs *tf;
298
299 if (!(fabric_mod)) {
300 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
301 return NULL;
302 }
303 if (!(name)) {
304 printk(KERN_ERR "Unable to locate passed fabric name\n");
305 return NULL;
306 }
307 if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
308 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
309 "_NAME_SIZE\n", name);
310 return NULL;
311 }
312
313 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
314 if (!(tf))
315 return ERR_PTR(-ENOMEM);
316
317 INIT_LIST_HEAD(&tf->tf_list);
318 atomic_set(&tf->tf_access_cnt, 0);
319 /*
320 * Setup the default generic struct config_item_type's (cits) in
321 * struct target_fabric_configfs->tf_cit_tmpl
322 */
323 tf->tf_module = fabric_mod;
324 target_fabric_setup_cits(tf);
325
326 tf->tf_subsys = target_core_subsystem[0];
327 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
328
329 mutex_lock(&g_tf_lock);
330 list_add_tail(&tf->tf_list, &g_tf_list);
331 mutex_unlock(&g_tf_lock);
332
333 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
334 ">>>>>>>>>>>>>>\n");
335 printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
336 " %s\n", tf, tf->tf_name);
337 return tf;
338 }
339 EXPORT_SYMBOL(target_fabric_configfs_init);
340
341 /*
342 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
343 */
344 void target_fabric_configfs_free(
345 struct target_fabric_configfs *tf)
346 {
347 mutex_lock(&g_tf_lock);
348 list_del(&tf->tf_list);
349 mutex_unlock(&g_tf_lock);
350
351 kfree(tf);
352 }
353 EXPORT_SYMBOL(target_fabric_configfs_free);
354
355 /*
356 * Perform a sanity check of the passed tf->tf_ops before completing
357 * TCM fabric module registration.
358 */
359 static int target_fabric_tf_ops_check(
360 struct target_fabric_configfs *tf)
361 {
362 struct target_core_fabric_ops *tfo = &tf->tf_ops;
363
364 if (!(tfo->get_fabric_name)) {
365 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
366 return -EINVAL;
367 }
368 if (!(tfo->get_fabric_proto_ident)) {
369 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
370 return -EINVAL;
371 }
372 if (!(tfo->tpg_get_wwn)) {
373 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
374 return -EINVAL;
375 }
376 if (!(tfo->tpg_get_tag)) {
377 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
378 return -EINVAL;
379 }
380 if (!(tfo->tpg_get_default_depth)) {
381 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
382 return -EINVAL;
383 }
384 if (!(tfo->tpg_get_pr_transport_id)) {
385 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
386 return -EINVAL;
387 }
388 if (!(tfo->tpg_get_pr_transport_id_len)) {
389 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
390 return -EINVAL;
391 }
392 if (!(tfo->tpg_check_demo_mode)) {
393 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
394 return -EINVAL;
395 }
396 if (!(tfo->tpg_check_demo_mode_cache)) {
397 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
398 return -EINVAL;
399 }
400 if (!(tfo->tpg_check_demo_mode_write_protect)) {
401 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
402 return -EINVAL;
403 }
404 if (!(tfo->tpg_check_prod_mode_write_protect)) {
405 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
406 return -EINVAL;
407 }
408 if (!(tfo->tpg_alloc_fabric_acl)) {
409 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
410 return -EINVAL;
411 }
412 if (!(tfo->tpg_release_fabric_acl)) {
413 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
414 return -EINVAL;
415 }
416 if (!(tfo->tpg_get_inst_index)) {
417 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
418 return -EINVAL;
419 }
420 if (!(tfo->release_cmd_to_pool)) {
421 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
422 return -EINVAL;
423 }
424 if (!(tfo->release_cmd_direct)) {
425 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
426 return -EINVAL;
427 }
428 if (!(tfo->shutdown_session)) {
429 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
430 return -EINVAL;
431 }
432 if (!(tfo->close_session)) {
433 printk(KERN_ERR "Missing tfo->close_session()\n");
434 return -EINVAL;
435 }
436 if (!(tfo->stop_session)) {
437 printk(KERN_ERR "Missing tfo->stop_session()\n");
438 return -EINVAL;
439 }
440 if (!(tfo->fall_back_to_erl0)) {
441 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
442 return -EINVAL;
443 }
444 if (!(tfo->sess_logged_in)) {
445 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
446 return -EINVAL;
447 }
448 if (!(tfo->sess_get_index)) {
449 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
450 return -EINVAL;
451 }
452 if (!(tfo->write_pending)) {
453 printk(KERN_ERR "Missing tfo->write_pending()\n");
454 return -EINVAL;
455 }
456 if (!(tfo->write_pending_status)) {
457 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
458 return -EINVAL;
459 }
460 if (!(tfo->set_default_node_attributes)) {
461 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
462 return -EINVAL;
463 }
464 if (!(tfo->get_task_tag)) {
465 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
466 return -EINVAL;
467 }
468 if (!(tfo->get_cmd_state)) {
469 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
470 return -EINVAL;
471 }
472 if (!(tfo->new_cmd_failure)) {
473 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
474 return -EINVAL;
475 }
476 if (!(tfo->queue_data_in)) {
477 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
478 return -EINVAL;
479 }
480 if (!(tfo->queue_status)) {
481 printk(KERN_ERR "Missing tfo->queue_status()\n");
482 return -EINVAL;
483 }
484 if (!(tfo->queue_tm_rsp)) {
485 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
486 return -EINVAL;
487 }
488 if (!(tfo->set_fabric_sense_len)) {
489 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
490 return -EINVAL;
491 }
492 if (!(tfo->get_fabric_sense_len)) {
493 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
494 return -EINVAL;
495 }
496 if (!(tfo->is_state_remove)) {
497 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
498 return -EINVAL;
499 }
500 if (!(tfo->pack_lun)) {
501 printk(KERN_ERR "Missing tfo->pack_lun()\n");
502 return -EINVAL;
503 }
504 /*
505 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
506 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
507 * target_core_fabric_configfs.c WWN+TPG group context code.
508 */
509 if (!(tfo->fabric_make_wwn)) {
510 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
511 return -EINVAL;
512 }
513 if (!(tfo->fabric_drop_wwn)) {
514 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
515 return -EINVAL;
516 }
517 if (!(tfo->fabric_make_tpg)) {
518 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
519 return -EINVAL;
520 }
521 if (!(tfo->fabric_drop_tpg)) {
522 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
523 return -EINVAL;
524 }
525
526 return 0;
527 }
528
529 /*
530 * Called 2nd from fabric module with returned parameter of
531 * struct target_fabric_configfs * from target_fabric_configfs_init().
532 *
533 * Upon a successful registration, the new fabric's struct config_item is
534 * return. Also, a pointer to this struct is set in the passed
535 * struct target_fabric_configfs.
536 */
537 int target_fabric_configfs_register(
538 struct target_fabric_configfs *tf)
539 {
540 struct config_group *su_group;
541 int ret;
542
543 if (!(tf)) {
544 printk(KERN_ERR "Unable to locate target_fabric_configfs"
545 " pointer\n");
546 return -EINVAL;
547 }
548 if (!(tf->tf_subsys)) {
549 printk(KERN_ERR "Unable to target struct config_subsystem"
550 " pointer\n");
551 return -EINVAL;
552 }
553 su_group = &tf->tf_subsys->su_group;
554 if (!(su_group)) {
555 printk(KERN_ERR "Unable to locate target struct config_group"
556 " pointer\n");
557 return -EINVAL;
558 }
559 ret = target_fabric_tf_ops_check(tf);
560 if (ret < 0)
561 return ret;
562
563 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
564 ">>>>>>>>>>\n");
565 return 0;
566 }
567 EXPORT_SYMBOL(target_fabric_configfs_register);
568
569 void target_fabric_configfs_deregister(
570 struct target_fabric_configfs *tf)
571 {
572 struct config_group *su_group;
573 struct configfs_subsystem *su;
574
575 if (!(tf)) {
576 printk(KERN_ERR "Unable to locate passed target_fabric_"
577 "configfs\n");
578 return;
579 }
580 su = tf->tf_subsys;
581 if (!(su)) {
582 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
583 " pointer\n");
584 return;
585 }
586 su_group = &tf->tf_subsys->su_group;
587 if (!(su_group)) {
588 printk(KERN_ERR "Unable to locate target struct config_group"
589 " pointer\n");
590 return;
591 }
592
593 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
594 ">>>>>>>>>>>>\n");
595 mutex_lock(&g_tf_lock);
596 if (atomic_read(&tf->tf_access_cnt)) {
597 mutex_unlock(&g_tf_lock);
598 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
599 tf->tf_name);
600 BUG();
601 }
602 list_del(&tf->tf_list);
603 mutex_unlock(&g_tf_lock);
604
605 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
606 " %s\n", tf->tf_name);
607 tf->tf_module = NULL;
608 tf->tf_subsys = NULL;
609 kfree(tf);
610
611 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
612 ">>>>>\n");
613 return;
614 }
615 EXPORT_SYMBOL(target_fabric_configfs_deregister);
616
617 /*##############################################################################
618 // Stop functions called by external Target Fabrics Modules
619 //############################################################################*/
620
621 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
622
623 #define DEF_DEV_ATTRIB_SHOW(_name) \
624 static ssize_t target_core_dev_show_attr_##_name( \
625 struct se_dev_attrib *da, \
626 char *page) \
627 { \
628 struct se_device *dev; \
629 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
630 ssize_t rb; \
631 \
632 spin_lock(&se_dev->se_dev_lock); \
633 dev = se_dev->se_dev_ptr; \
634 if (!(dev)) { \
635 spin_unlock(&se_dev->se_dev_lock); \
636 return -ENODEV; \
637 } \
638 rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
639 spin_unlock(&se_dev->se_dev_lock); \
640 \
641 return rb; \
642 }
643
644 #define DEF_DEV_ATTRIB_STORE(_name) \
645 static ssize_t target_core_dev_store_attr_##_name( \
646 struct se_dev_attrib *da, \
647 const char *page, \
648 size_t count) \
649 { \
650 struct se_device *dev; \
651 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
652 unsigned long val; \
653 int ret; \
654 \
655 spin_lock(&se_dev->se_dev_lock); \
656 dev = se_dev->se_dev_ptr; \
657 if (!(dev)) { \
658 spin_unlock(&se_dev->se_dev_lock); \
659 return -ENODEV; \
660 } \
661 ret = strict_strtoul(page, 0, &val); \
662 if (ret < 0) { \
663 spin_unlock(&se_dev->se_dev_lock); \
664 printk(KERN_ERR "strict_strtoul() failed with" \
665 " ret: %d\n", ret); \
666 return -EINVAL; \
667 } \
668 ret = se_dev_set_##_name(dev, (u32)val); \
669 spin_unlock(&se_dev->se_dev_lock); \
670 \
671 return (!ret) ? count : -EINVAL; \
672 }
673
674 #define DEF_DEV_ATTRIB(_name) \
675 DEF_DEV_ATTRIB_SHOW(_name); \
676 DEF_DEV_ATTRIB_STORE(_name);
677
678 #define DEF_DEV_ATTRIB_RO(_name) \
679 DEF_DEV_ATTRIB_SHOW(_name);
680
681 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
682 #define SE_DEV_ATTR(_name, _mode) \
683 static struct target_core_dev_attrib_attribute \
684 target_core_dev_attrib_##_name = \
685 __CONFIGFS_EATTR(_name, _mode, \
686 target_core_dev_show_attr_##_name, \
687 target_core_dev_store_attr_##_name);
688
689 #define SE_DEV_ATTR_RO(_name); \
690 static struct target_core_dev_attrib_attribute \
691 target_core_dev_attrib_##_name = \
692 __CONFIGFS_EATTR_RO(_name, \
693 target_core_dev_show_attr_##_name);
694
695 DEF_DEV_ATTRIB(emulate_dpo);
696 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
697
698 DEF_DEV_ATTRIB(emulate_fua_write);
699 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
700
701 DEF_DEV_ATTRIB(emulate_fua_read);
702 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
703
704 DEF_DEV_ATTRIB(emulate_write_cache);
705 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
706
707 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
708 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
709
710 DEF_DEV_ATTRIB(emulate_tas);
711 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
712
713 DEF_DEV_ATTRIB(emulate_tpu);
714 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
715
716 DEF_DEV_ATTRIB(emulate_tpws);
717 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
718
719 DEF_DEV_ATTRIB(enforce_pr_isids);
720 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
721
722 DEF_DEV_ATTRIB_RO(hw_block_size);
723 SE_DEV_ATTR_RO(hw_block_size);
724
725 DEF_DEV_ATTRIB(block_size);
726 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
727
728 DEF_DEV_ATTRIB_RO(hw_max_sectors);
729 SE_DEV_ATTR_RO(hw_max_sectors);
730
731 DEF_DEV_ATTRIB(max_sectors);
732 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
733
734 DEF_DEV_ATTRIB(optimal_sectors);
735 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
736
737 DEF_DEV_ATTRIB_RO(hw_queue_depth);
738 SE_DEV_ATTR_RO(hw_queue_depth);
739
740 DEF_DEV_ATTRIB(queue_depth);
741 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
742
743 DEF_DEV_ATTRIB(task_timeout);
744 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
745
746 DEF_DEV_ATTRIB(max_unmap_lba_count);
747 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
748
749 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
750 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
751
752 DEF_DEV_ATTRIB(unmap_granularity);
753 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
754
755 DEF_DEV_ATTRIB(unmap_granularity_alignment);
756 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
757
758 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
759
760 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
761 &target_core_dev_attrib_emulate_dpo.attr,
762 &target_core_dev_attrib_emulate_fua_write.attr,
763 &target_core_dev_attrib_emulate_fua_read.attr,
764 &target_core_dev_attrib_emulate_write_cache.attr,
765 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
766 &target_core_dev_attrib_emulate_tas.attr,
767 &target_core_dev_attrib_emulate_tpu.attr,
768 &target_core_dev_attrib_emulate_tpws.attr,
769 &target_core_dev_attrib_enforce_pr_isids.attr,
770 &target_core_dev_attrib_hw_block_size.attr,
771 &target_core_dev_attrib_block_size.attr,
772 &target_core_dev_attrib_hw_max_sectors.attr,
773 &target_core_dev_attrib_max_sectors.attr,
774 &target_core_dev_attrib_optimal_sectors.attr,
775 &target_core_dev_attrib_hw_queue_depth.attr,
776 &target_core_dev_attrib_queue_depth.attr,
777 &target_core_dev_attrib_task_timeout.attr,
778 &target_core_dev_attrib_max_unmap_lba_count.attr,
779 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
780 &target_core_dev_attrib_unmap_granularity.attr,
781 &target_core_dev_attrib_unmap_granularity_alignment.attr,
782 NULL,
783 };
784
785 static struct configfs_item_operations target_core_dev_attrib_ops = {
786 .show_attribute = target_core_dev_attrib_attr_show,
787 .store_attribute = target_core_dev_attrib_attr_store,
788 };
789
790 static struct config_item_type target_core_dev_attrib_cit = {
791 .ct_item_ops = &target_core_dev_attrib_ops,
792 .ct_attrs = target_core_dev_attrib_attrs,
793 .ct_owner = THIS_MODULE,
794 };
795
796 /* End functions for struct config_item_type target_core_dev_attrib_cit */
797
798 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
799
800 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
801 #define SE_DEV_WWN_ATTR(_name, _mode) \
802 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
803 __CONFIGFS_EATTR(_name, _mode, \
804 target_core_dev_wwn_show_attr_##_name, \
805 target_core_dev_wwn_store_attr_##_name);
806
807 #define SE_DEV_WWN_ATTR_RO(_name); \
808 do { \
809 static struct target_core_dev_wwn_attribute \
810 target_core_dev_wwn_##_name = \
811 __CONFIGFS_EATTR_RO(_name, \
812 target_core_dev_wwn_show_attr_##_name); \
813 } while (0);
814
815 /*
816 * VPD page 0x80 Unit serial
817 */
818 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
819 struct t10_wwn *t10_wwn,
820 char *page)
821 {
822 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
823 struct se_device *dev;
824
825 dev = se_dev->se_dev_ptr;
826 if (!(dev))
827 return -ENODEV;
828
829 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
830 &t10_wwn->unit_serial[0]);
831 }
832
833 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
834 struct t10_wwn *t10_wwn,
835 const char *page,
836 size_t count)
837 {
838 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
839 struct se_device *dev;
840 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
841
842 /*
843 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
844 * from the struct scsi_device level firmware, do not allow
845 * VPD Unit Serial to be emulated.
846 *
847 * Note this struct scsi_device could also be emulating VPD
848 * information from its drivers/scsi LLD. But for now we assume
849 * it is doing 'the right thing' wrt a world wide unique
850 * VPD Unit Serial Number that OS dependent multipath can depend on.
851 */
852 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
853 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
854 " Unit Serial, ignoring request\n");
855 return -EOPNOTSUPP;
856 }
857
858 if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
859 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
860 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
861 return -EOVERFLOW;
862 }
863 /*
864 * Check to see if any active $FABRIC_MOD exports exist. If they
865 * do exist, fail here as changing this information on the fly
866 * (underneath the initiator side OS dependent multipath code)
867 * could cause negative effects.
868 */
869 dev = su_dev->se_dev_ptr;
870 if ((dev)) {
871 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
872 printk(KERN_ERR "Unable to set VPD Unit Serial while"
873 " active %d $FABRIC_MOD exports exist\n",
874 atomic_read(&dev->dev_export_obj.obj_access_count));
875 return -EINVAL;
876 }
877 }
878 /*
879 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
880 *
881 * Also, strip any newline added from the userspace
882 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
883 */
884 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
885 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
886 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
887 "%s", strstrip(buf));
888 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
889
890 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
891 " %s\n", su_dev->t10_wwn.unit_serial);
892
893 return count;
894 }
895
896 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
897
898 /*
899 * VPD page 0x83 Protocol Identifier
900 */
901 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
902 struct t10_wwn *t10_wwn,
903 char *page)
904 {
905 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
906 struct se_device *dev;
907 struct t10_vpd *vpd;
908 unsigned char buf[VPD_TMP_BUF_SIZE];
909 ssize_t len = 0;
910
911 dev = se_dev->se_dev_ptr;
912 if (!(dev))
913 return -ENODEV;
914
915 memset(buf, 0, VPD_TMP_BUF_SIZE);
916
917 spin_lock(&t10_wwn->t10_vpd_lock);
918 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
919 if (!(vpd->protocol_identifier_set))
920 continue;
921
922 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
923
924 if ((len + strlen(buf) > PAGE_SIZE))
925 break;
926
927 len += sprintf(page+len, "%s", buf);
928 }
929 spin_unlock(&t10_wwn->t10_vpd_lock);
930
931 return len;
932 }
933
934 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
935 struct t10_wwn *t10_wwn,
936 const char *page,
937 size_t count)
938 {
939 return -ENOSYS;
940 }
941
942 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
943
944 /*
945 * Generic wrapper for dumping VPD identifiers by association.
946 */
947 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
948 static ssize_t target_core_dev_wwn_show_attr_##_name( \
949 struct t10_wwn *t10_wwn, \
950 char *page) \
951 { \
952 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
953 struct se_device *dev; \
954 struct t10_vpd *vpd; \
955 unsigned char buf[VPD_TMP_BUF_SIZE]; \
956 ssize_t len = 0; \
957 \
958 dev = se_dev->se_dev_ptr; \
959 if (!(dev)) \
960 return -ENODEV; \
961 \
962 spin_lock(&t10_wwn->t10_vpd_lock); \
963 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
964 if (vpd->association != _assoc) \
965 continue; \
966 \
967 memset(buf, 0, VPD_TMP_BUF_SIZE); \
968 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
969 if ((len + strlen(buf) > PAGE_SIZE)) \
970 break; \
971 len += sprintf(page+len, "%s", buf); \
972 \
973 memset(buf, 0, VPD_TMP_BUF_SIZE); \
974 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
975 if ((len + strlen(buf) > PAGE_SIZE)) \
976 break; \
977 len += sprintf(page+len, "%s", buf); \
978 \
979 memset(buf, 0, VPD_TMP_BUF_SIZE); \
980 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
981 if ((len + strlen(buf) > PAGE_SIZE)) \
982 break; \
983 len += sprintf(page+len, "%s", buf); \
984 } \
985 spin_unlock(&t10_wwn->t10_vpd_lock); \
986 \
987 return len; \
988 }
989
990 /*
991 * VPD page 0x83 Assoication: Logical Unit
992 */
993 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
994
995 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
996 struct t10_wwn *t10_wwn,
997 const char *page,
998 size_t count)
999 {
1000 return -ENOSYS;
1001 }
1002
1003 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1004
1005 /*
1006 * VPD page 0x83 Association: Target Port
1007 */
1008 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1009
1010 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1011 struct t10_wwn *t10_wwn,
1012 const char *page,
1013 size_t count)
1014 {
1015 return -ENOSYS;
1016 }
1017
1018 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1019
1020 /*
1021 * VPD page 0x83 Association: SCSI Target Device
1022 */
1023 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1024
1025 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1026 struct t10_wwn *t10_wwn,
1027 const char *page,
1028 size_t count)
1029 {
1030 return -ENOSYS;
1031 }
1032
1033 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1034
1035 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1036
1037 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1038 &target_core_dev_wwn_vpd_unit_serial.attr,
1039 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1040 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1041 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1042 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1043 NULL,
1044 };
1045
1046 static struct configfs_item_operations target_core_dev_wwn_ops = {
1047 .show_attribute = target_core_dev_wwn_attr_show,
1048 .store_attribute = target_core_dev_wwn_attr_store,
1049 };
1050
1051 static struct config_item_type target_core_dev_wwn_cit = {
1052 .ct_item_ops = &target_core_dev_wwn_ops,
1053 .ct_attrs = target_core_dev_wwn_attrs,
1054 .ct_owner = THIS_MODULE,
1055 };
1056
1057 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1058
1059 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1060
1061 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1062 #define SE_DEV_PR_ATTR(_name, _mode) \
1063 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1064 __CONFIGFS_EATTR(_name, _mode, \
1065 target_core_dev_pr_show_attr_##_name, \
1066 target_core_dev_pr_store_attr_##_name);
1067
1068 #define SE_DEV_PR_ATTR_RO(_name); \
1069 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1070 __CONFIGFS_EATTR_RO(_name, \
1071 target_core_dev_pr_show_attr_##_name);
1072
1073 /*
1074 * res_holder
1075 */
1076 static ssize_t target_core_dev_pr_show_spc3_res(
1077 struct se_device *dev,
1078 char *page,
1079 ssize_t *len)
1080 {
1081 struct se_node_acl *se_nacl;
1082 struct t10_pr_registration *pr_reg;
1083 char i_buf[PR_REG_ISID_ID_LEN];
1084 int prf_isid;
1085
1086 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1087
1088 spin_lock(&dev->dev_reservation_lock);
1089 pr_reg = dev->dev_pr_res_holder;
1090 if (!(pr_reg)) {
1091 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1092 spin_unlock(&dev->dev_reservation_lock);
1093 return *len;
1094 }
1095 se_nacl = pr_reg->pr_reg_nacl;
1096 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1097 PR_REG_ISID_ID_LEN);
1098
1099 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1100 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1101 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1102 spin_unlock(&dev->dev_reservation_lock);
1103
1104 return *len;
1105 }
1106
1107 static ssize_t target_core_dev_pr_show_spc2_res(
1108 struct se_device *dev,
1109 char *page,
1110 ssize_t *len)
1111 {
1112 struct se_node_acl *se_nacl;
1113
1114 spin_lock(&dev->dev_reservation_lock);
1115 se_nacl = dev->dev_reserved_node_acl;
1116 if (!(se_nacl)) {
1117 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1118 spin_unlock(&dev->dev_reservation_lock);
1119 return *len;
1120 }
1121 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1122 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1123 se_nacl->initiatorname);
1124 spin_unlock(&dev->dev_reservation_lock);
1125
1126 return *len;
1127 }
1128
1129 static ssize_t target_core_dev_pr_show_attr_res_holder(
1130 struct se_subsystem_dev *su_dev,
1131 char *page)
1132 {
1133 ssize_t len = 0;
1134
1135 if (!(su_dev->se_dev_ptr))
1136 return -ENODEV;
1137
1138 switch (T10_RES(su_dev)->res_type) {
1139 case SPC3_PERSISTENT_RESERVATIONS:
1140 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1141 page, &len);
1142 break;
1143 case SPC2_RESERVATIONS:
1144 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1145 page, &len);
1146 break;
1147 case SPC_PASSTHROUGH:
1148 len += sprintf(page+len, "Passthrough\n");
1149 break;
1150 default:
1151 len += sprintf(page+len, "Unknown\n");
1152 break;
1153 }
1154
1155 return len;
1156 }
1157
1158 SE_DEV_PR_ATTR_RO(res_holder);
1159
1160 /*
1161 * res_pr_all_tgt_pts
1162 */
1163 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1164 struct se_subsystem_dev *su_dev,
1165 char *page)
1166 {
1167 struct se_device *dev;
1168 struct t10_pr_registration *pr_reg;
1169 ssize_t len = 0;
1170
1171 dev = su_dev->se_dev_ptr;
1172 if (!(dev))
1173 return -ENODEV;
1174
1175 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1176 return len;
1177
1178 spin_lock(&dev->dev_reservation_lock);
1179 pr_reg = dev->dev_pr_res_holder;
1180 if (!(pr_reg)) {
1181 len = sprintf(page, "No SPC-3 Reservation holder\n");
1182 spin_unlock(&dev->dev_reservation_lock);
1183 return len;
1184 }
1185 /*
1186 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1187 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1188 */
1189 if (pr_reg->pr_reg_all_tg_pt)
1190 len = sprintf(page, "SPC-3 Reservation: All Target"
1191 " Ports registration\n");
1192 else
1193 len = sprintf(page, "SPC-3 Reservation: Single"
1194 " Target Port registration\n");
1195 spin_unlock(&dev->dev_reservation_lock);
1196
1197 return len;
1198 }
1199
1200 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1201
1202 /*
1203 * res_pr_generation
1204 */
1205 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1206 struct se_subsystem_dev *su_dev,
1207 char *page)
1208 {
1209 if (!(su_dev->se_dev_ptr))
1210 return -ENODEV;
1211
1212 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1213 return 0;
1214
1215 return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1216 }
1217
1218 SE_DEV_PR_ATTR_RO(res_pr_generation);
1219
1220 /*
1221 * res_pr_holder_tg_port
1222 */
1223 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1224 struct se_subsystem_dev *su_dev,
1225 char *page)
1226 {
1227 struct se_device *dev;
1228 struct se_node_acl *se_nacl;
1229 struct se_lun *lun;
1230 struct se_portal_group *se_tpg;
1231 struct t10_pr_registration *pr_reg;
1232 struct target_core_fabric_ops *tfo;
1233 ssize_t len = 0;
1234
1235 dev = su_dev->se_dev_ptr;
1236 if (!(dev))
1237 return -ENODEV;
1238
1239 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1240 return len;
1241
1242 spin_lock(&dev->dev_reservation_lock);
1243 pr_reg = dev->dev_pr_res_holder;
1244 if (!(pr_reg)) {
1245 len = sprintf(page, "No SPC-3 Reservation holder\n");
1246 spin_unlock(&dev->dev_reservation_lock);
1247 return len;
1248 }
1249 se_nacl = pr_reg->pr_reg_nacl;
1250 se_tpg = se_nacl->se_tpg;
1251 lun = pr_reg->pr_reg_tg_pt_lun;
1252 tfo = TPG_TFO(se_tpg);
1253
1254 len += sprintf(page+len, "SPC-3 Reservation: %s"
1255 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1256 tfo->tpg_get_wwn(se_tpg));
1257 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1258 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1259 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1260 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1261 tfo->get_fabric_name(), lun->unpacked_lun);
1262 spin_unlock(&dev->dev_reservation_lock);
1263
1264 return len;
1265 }
1266
1267 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1268
1269 /*
1270 * res_pr_registered_i_pts
1271 */
1272 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1273 struct se_subsystem_dev *su_dev,
1274 char *page)
1275 {
1276 struct target_core_fabric_ops *tfo;
1277 struct t10_pr_registration *pr_reg;
1278 unsigned char buf[384];
1279 char i_buf[PR_REG_ISID_ID_LEN];
1280 ssize_t len = 0;
1281 int reg_count = 0, prf_isid;
1282
1283 if (!(su_dev->se_dev_ptr))
1284 return -ENODEV;
1285
1286 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1287 return len;
1288
1289 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1290
1291 spin_lock(&T10_RES(su_dev)->registration_lock);
1292 list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1293 pr_reg_list) {
1294
1295 memset(buf, 0, 384);
1296 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1297 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1298 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1299 PR_REG_ISID_ID_LEN);
1300 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1301 tfo->get_fabric_name(),
1302 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1303 &i_buf[0] : "", pr_reg->pr_res_key,
1304 pr_reg->pr_res_generation);
1305
1306 if ((len + strlen(buf) > PAGE_SIZE))
1307 break;
1308
1309 len += sprintf(page+len, "%s", buf);
1310 reg_count++;
1311 }
1312 spin_unlock(&T10_RES(su_dev)->registration_lock);
1313
1314 if (!(reg_count))
1315 len += sprintf(page+len, "None\n");
1316
1317 return len;
1318 }
1319
1320 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1321
1322 /*
1323 * res_pr_type
1324 */
1325 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1326 struct se_subsystem_dev *su_dev,
1327 char *page)
1328 {
1329 struct se_device *dev;
1330 struct t10_pr_registration *pr_reg;
1331 ssize_t len = 0;
1332
1333 dev = su_dev->se_dev_ptr;
1334 if (!(dev))
1335 return -ENODEV;
1336
1337 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1338 return len;
1339
1340 spin_lock(&dev->dev_reservation_lock);
1341 pr_reg = dev->dev_pr_res_holder;
1342 if (!(pr_reg)) {
1343 len = sprintf(page, "No SPC-3 Reservation holder\n");
1344 spin_unlock(&dev->dev_reservation_lock);
1345 return len;
1346 }
1347 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1348 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1349 spin_unlock(&dev->dev_reservation_lock);
1350
1351 return len;
1352 }
1353
1354 SE_DEV_PR_ATTR_RO(res_pr_type);
1355
1356 /*
1357 * res_type
1358 */
1359 static ssize_t target_core_dev_pr_show_attr_res_type(
1360 struct se_subsystem_dev *su_dev,
1361 char *page)
1362 {
1363 ssize_t len = 0;
1364
1365 if (!(su_dev->se_dev_ptr))
1366 return -ENODEV;
1367
1368 switch (T10_RES(su_dev)->res_type) {
1369 case SPC3_PERSISTENT_RESERVATIONS:
1370 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1371 break;
1372 case SPC2_RESERVATIONS:
1373 len = sprintf(page, "SPC2_RESERVATIONS\n");
1374 break;
1375 case SPC_PASSTHROUGH:
1376 len = sprintf(page, "SPC_PASSTHROUGH\n");
1377 break;
1378 default:
1379 len = sprintf(page, "UNKNOWN\n");
1380 break;
1381 }
1382
1383 return len;
1384 }
1385
1386 SE_DEV_PR_ATTR_RO(res_type);
1387
1388 /*
1389 * res_aptpl_active
1390 */
1391
1392 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1393 struct se_subsystem_dev *su_dev,
1394 char *page)
1395 {
1396 if (!(su_dev->se_dev_ptr))
1397 return -ENODEV;
1398
1399 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1400 return 0;
1401
1402 return sprintf(page, "APTPL Bit Status: %s\n",
1403 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1404 }
1405
1406 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1407
1408 /*
1409 * res_aptpl_metadata
1410 */
1411 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1412 struct se_subsystem_dev *su_dev,
1413 char *page)
1414 {
1415 if (!(su_dev->se_dev_ptr))
1416 return -ENODEV;
1417
1418 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1419 return 0;
1420
1421 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1422 }
1423
1424 enum {
1425 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1426 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1427 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1428 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1429 };
1430
1431 static match_table_t tokens = {
1432 {Opt_initiator_fabric, "initiator_fabric=%s"},
1433 {Opt_initiator_node, "initiator_node=%s"},
1434 {Opt_initiator_sid, "initiator_sid=%s"},
1435 {Opt_sa_res_key, "sa_res_key=%s"},
1436 {Opt_res_holder, "res_holder=%d"},
1437 {Opt_res_type, "res_type=%d"},
1438 {Opt_res_scope, "res_scope=%d"},
1439 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1440 {Opt_mapped_lun, "mapped_lun=%d"},
1441 {Opt_target_fabric, "target_fabric=%s"},
1442 {Opt_target_node, "target_node=%s"},
1443 {Opt_tpgt, "tpgt=%d"},
1444 {Opt_port_rtpi, "port_rtpi=%d"},
1445 {Opt_target_lun, "target_lun=%d"},
1446 {Opt_err, NULL}
1447 };
1448
1449 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1450 struct se_subsystem_dev *su_dev,
1451 const char *page,
1452 size_t count)
1453 {
1454 struct se_device *dev;
1455 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1456 unsigned char *t_fabric = NULL, *t_port = NULL;
1457 char *orig, *ptr, *arg_p, *opts;
1458 substring_t args[MAX_OPT_ARGS];
1459 unsigned long long tmp_ll;
1460 u64 sa_res_key = 0;
1461 u32 mapped_lun = 0, target_lun = 0;
1462 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1463 u16 port_rpti = 0, tpgt = 0;
1464 u8 type = 0, scope;
1465
1466 dev = su_dev->se_dev_ptr;
1467 if (!(dev))
1468 return -ENODEV;
1469
1470 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1471 return 0;
1472
1473 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1474 printk(KERN_INFO "Unable to process APTPL metadata while"
1475 " active fabric exports exist\n");
1476 return -EINVAL;
1477 }
1478
1479 opts = kstrdup(page, GFP_KERNEL);
1480 if (!opts)
1481 return -ENOMEM;
1482
1483 orig = opts;
1484 while ((ptr = strsep(&opts, ",")) != NULL) {
1485 if (!*ptr)
1486 continue;
1487
1488 token = match_token(ptr, tokens, args);
1489 switch (token) {
1490 case Opt_initiator_fabric:
1491 i_fabric = match_strdup(&args[0]);
1492 if (!i_fabric) {
1493 ret = -ENOMEM;
1494 goto out;
1495 }
1496 break;
1497 case Opt_initiator_node:
1498 i_port = match_strdup(&args[0]);
1499 if (!i_port) {
1500 ret = -ENOMEM;
1501 goto out;
1502 }
1503 if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
1504 printk(KERN_ERR "APTPL metadata initiator_node="
1505 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1506 PR_APTPL_MAX_IPORT_LEN);
1507 ret = -EINVAL;
1508 break;
1509 }
1510 break;
1511 case Opt_initiator_sid:
1512 isid = match_strdup(&args[0]);
1513 if (!isid) {
1514 ret = -ENOMEM;
1515 goto out;
1516 }
1517 if (strlen(isid) > PR_REG_ISID_LEN) {
1518 printk(KERN_ERR "APTPL metadata initiator_isid"
1519 "= exceeds PR_REG_ISID_LEN: %d\n",
1520 PR_REG_ISID_LEN);
1521 ret = -EINVAL;
1522 break;
1523 }
1524 break;
1525 case Opt_sa_res_key:
1526 arg_p = match_strdup(&args[0]);
1527 if (!arg_p) {
1528 ret = -ENOMEM;
1529 goto out;
1530 }
1531 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1532 if (ret < 0) {
1533 printk(KERN_ERR "strict_strtoull() failed for"
1534 " sa_res_key=\n");
1535 goto out;
1536 }
1537 sa_res_key = (u64)tmp_ll;
1538 break;
1539 /*
1540 * PR APTPL Metadata for Reservation
1541 */
1542 case Opt_res_holder:
1543 match_int(args, &arg);
1544 res_holder = arg;
1545 break;
1546 case Opt_res_type:
1547 match_int(args, &arg);
1548 type = (u8)arg;
1549 break;
1550 case Opt_res_scope:
1551 match_int(args, &arg);
1552 scope = (u8)arg;
1553 break;
1554 case Opt_res_all_tg_pt:
1555 match_int(args, &arg);
1556 all_tg_pt = (int)arg;
1557 break;
1558 case Opt_mapped_lun:
1559 match_int(args, &arg);
1560 mapped_lun = (u32)arg;
1561 break;
1562 /*
1563 * PR APTPL Metadata for Target Port
1564 */
1565 case Opt_target_fabric:
1566 t_fabric = match_strdup(&args[0]);
1567 if (!t_fabric) {
1568 ret = -ENOMEM;
1569 goto out;
1570 }
1571 break;
1572 case Opt_target_node:
1573 t_port = match_strdup(&args[0]);
1574 if (!t_port) {
1575 ret = -ENOMEM;
1576 goto out;
1577 }
1578 if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
1579 printk(KERN_ERR "APTPL metadata target_node="
1580 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1581 PR_APTPL_MAX_TPORT_LEN);
1582 ret = -EINVAL;
1583 break;
1584 }
1585 break;
1586 case Opt_tpgt:
1587 match_int(args, &arg);
1588 tpgt = (u16)arg;
1589 break;
1590 case Opt_port_rtpi:
1591 match_int(args, &arg);
1592 port_rpti = (u16)arg;
1593 break;
1594 case Opt_target_lun:
1595 match_int(args, &arg);
1596 target_lun = (u32)arg;
1597 break;
1598 default:
1599 break;
1600 }
1601 }
1602
1603 if (!(i_port) || !(t_port) || !(sa_res_key)) {
1604 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1605 ret = -EINVAL;
1606 goto out;
1607 }
1608
1609 if (res_holder && !(type)) {
1610 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1611 " holder\n", type);
1612 ret = -EINVAL;
1613 goto out;
1614 }
1615
1616 ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1617 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1618 res_holder, all_tg_pt, type);
1619 out:
1620 kfree(i_fabric);
1621 kfree(i_port);
1622 kfree(isid);
1623 kfree(t_fabric);
1624 kfree(t_port);
1625 kfree(orig);
1626 return (ret == 0) ? count : ret;
1627 }
1628
1629 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1630
1631 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1632
1633 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1634 &target_core_dev_pr_res_holder.attr,
1635 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1636 &target_core_dev_pr_res_pr_generation.attr,
1637 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1638 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1639 &target_core_dev_pr_res_pr_type.attr,
1640 &target_core_dev_pr_res_type.attr,
1641 &target_core_dev_pr_res_aptpl_active.attr,
1642 &target_core_dev_pr_res_aptpl_metadata.attr,
1643 NULL,
1644 };
1645
1646 static struct configfs_item_operations target_core_dev_pr_ops = {
1647 .show_attribute = target_core_dev_pr_attr_show,
1648 .store_attribute = target_core_dev_pr_attr_store,
1649 };
1650
1651 static struct config_item_type target_core_dev_pr_cit = {
1652 .ct_item_ops = &target_core_dev_pr_ops,
1653 .ct_attrs = target_core_dev_pr_attrs,
1654 .ct_owner = THIS_MODULE,
1655 };
1656
1657 /* End functions for struct config_item_type target_core_dev_pr_cit */
1658
1659 /* Start functions for struct config_item_type target_core_dev_cit */
1660
1661 static ssize_t target_core_show_dev_info(void *p, char *page)
1662 {
1663 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1664 struct se_hba *hba = se_dev->se_dev_hba;
1665 struct se_subsystem_api *t = hba->transport;
1666 int bl = 0;
1667 ssize_t read_bytes = 0;
1668
1669 if (!(se_dev->se_dev_ptr))
1670 return -ENODEV;
1671
1672 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1673 read_bytes += bl;
1674 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1675 return read_bytes;
1676 }
1677
1678 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1679 .attr = { .ca_owner = THIS_MODULE,
1680 .ca_name = "info",
1681 .ca_mode = S_IRUGO },
1682 .show = target_core_show_dev_info,
1683 .store = NULL,
1684 };
1685
1686 static ssize_t target_core_store_dev_control(
1687 void *p,
1688 const char *page,
1689 size_t count)
1690 {
1691 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1692 struct se_hba *hba = se_dev->se_dev_hba;
1693 struct se_subsystem_api *t = hba->transport;
1694
1695 if (!(se_dev->se_dev_su_ptr)) {
1696 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1697 "_dev_su_ptr\n");
1698 return -EINVAL;
1699 }
1700
1701 return t->set_configfs_dev_params(hba, se_dev, page, count);
1702 }
1703
1704 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1705 .attr = { .ca_owner = THIS_MODULE,
1706 .ca_name = "control",
1707 .ca_mode = S_IWUSR },
1708 .show = NULL,
1709 .store = target_core_store_dev_control,
1710 };
1711
1712 static ssize_t target_core_show_dev_alias(void *p, char *page)
1713 {
1714 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1715
1716 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1717 return 0;
1718
1719 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1720 }
1721
1722 static ssize_t target_core_store_dev_alias(
1723 void *p,
1724 const char *page,
1725 size_t count)
1726 {
1727 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1728 struct se_hba *hba = se_dev->se_dev_hba;
1729 ssize_t read_bytes;
1730
1731 if (count > (SE_DEV_ALIAS_LEN-1)) {
1732 printk(KERN_ERR "alias count: %d exceeds"
1733 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1734 SE_DEV_ALIAS_LEN-1);
1735 return -EINVAL;
1736 }
1737
1738 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1739 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1740 "%s", page);
1741
1742 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1743 config_item_name(&hba->hba_group.cg_item),
1744 config_item_name(&se_dev->se_dev_group.cg_item),
1745 se_dev->se_dev_alias);
1746
1747 return read_bytes;
1748 }
1749
1750 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1751 .attr = { .ca_owner = THIS_MODULE,
1752 .ca_name = "alias",
1753 .ca_mode = S_IRUGO | S_IWUSR },
1754 .show = target_core_show_dev_alias,
1755 .store = target_core_store_dev_alias,
1756 };
1757
1758 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1759 {
1760 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1761
1762 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1763 return 0;
1764
1765 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1766 }
1767
1768 static ssize_t target_core_store_dev_udev_path(
1769 void *p,
1770 const char *page,
1771 size_t count)
1772 {
1773 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1774 struct se_hba *hba = se_dev->se_dev_hba;
1775 ssize_t read_bytes;
1776
1777 if (count > (SE_UDEV_PATH_LEN-1)) {
1778 printk(KERN_ERR "udev_path count: %d exceeds"
1779 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1780 SE_UDEV_PATH_LEN-1);
1781 return -EINVAL;
1782 }
1783
1784 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1785 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1786 "%s", page);
1787
1788 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1789 config_item_name(&hba->hba_group.cg_item),
1790 config_item_name(&se_dev->se_dev_group.cg_item),
1791 se_dev->se_dev_udev_path);
1792
1793 return read_bytes;
1794 }
1795
1796 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1797 .attr = { .ca_owner = THIS_MODULE,
1798 .ca_name = "udev_path",
1799 .ca_mode = S_IRUGO | S_IWUSR },
1800 .show = target_core_show_dev_udev_path,
1801 .store = target_core_store_dev_udev_path,
1802 };
1803
1804 static ssize_t target_core_store_dev_enable(
1805 void *p,
1806 const char *page,
1807 size_t count)
1808 {
1809 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1810 struct se_device *dev;
1811 struct se_hba *hba = se_dev->se_dev_hba;
1812 struct se_subsystem_api *t = hba->transport;
1813 char *ptr;
1814
1815 ptr = strstr(page, "1");
1816 if (!(ptr)) {
1817 printk(KERN_ERR "For dev_enable ops, only valid value"
1818 " is \"1\"\n");
1819 return -EINVAL;
1820 }
1821 if ((se_dev->se_dev_ptr)) {
1822 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1823 " object\n");
1824 return -EEXIST;
1825 }
1826
1827 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1828 return -EINVAL;
1829
1830 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1831 if (IS_ERR(dev))
1832 return PTR_ERR(dev);
1833 else if (!dev)
1834 return -EINVAL;
1835
1836 se_dev->se_dev_ptr = dev;
1837 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1838 " %p\n", se_dev->se_dev_ptr);
1839
1840 return count;
1841 }
1842
1843 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1844 .attr = { .ca_owner = THIS_MODULE,
1845 .ca_name = "enable",
1846 .ca_mode = S_IWUSR },
1847 .show = NULL,
1848 .store = target_core_store_dev_enable,
1849 };
1850
1851 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1852 {
1853 struct se_device *dev;
1854 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1855 struct config_item *lu_ci;
1856 struct t10_alua_lu_gp *lu_gp;
1857 struct t10_alua_lu_gp_member *lu_gp_mem;
1858 ssize_t len = 0;
1859
1860 dev = su_dev->se_dev_ptr;
1861 if (!(dev))
1862 return -ENODEV;
1863
1864 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1865 return len;
1866
1867 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1868 if (!(lu_gp_mem)) {
1869 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1870 " pointer\n");
1871 return -EINVAL;
1872 }
1873
1874 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1875 lu_gp = lu_gp_mem->lu_gp;
1876 if ((lu_gp)) {
1877 lu_ci = &lu_gp->lu_gp_group.cg_item;
1878 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1879 config_item_name(lu_ci), lu_gp->lu_gp_id);
1880 }
1881 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1882
1883 return len;
1884 }
1885
1886 static ssize_t target_core_store_alua_lu_gp(
1887 void *p,
1888 const char *page,
1889 size_t count)
1890 {
1891 struct se_device *dev;
1892 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1893 struct se_hba *hba = su_dev->se_dev_hba;
1894 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1895 struct t10_alua_lu_gp_member *lu_gp_mem;
1896 unsigned char buf[LU_GROUP_NAME_BUF];
1897 int move = 0;
1898
1899 dev = su_dev->se_dev_ptr;
1900 if (!(dev))
1901 return -ENODEV;
1902
1903 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1904 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1905 config_item_name(&hba->hba_group.cg_item),
1906 config_item_name(&su_dev->se_dev_group.cg_item));
1907 return -EINVAL;
1908 }
1909 if (count > LU_GROUP_NAME_BUF) {
1910 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1911 return -EINVAL;
1912 }
1913 memset(buf, 0, LU_GROUP_NAME_BUF);
1914 memcpy(buf, page, count);
1915 /*
1916 * Any ALUA logical unit alias besides "NULL" means we will be
1917 * making a new group association.
1918 */
1919 if (strcmp(strstrip(buf), "NULL")) {
1920 /*
1921 * core_alua_get_lu_gp_by_name() will increment reference to
1922 * struct t10_alua_lu_gp. This reference is released with
1923 * core_alua_get_lu_gp_by_name below().
1924 */
1925 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1926 if (!(lu_gp_new))
1927 return -ENODEV;
1928 }
1929 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1930 if (!(lu_gp_mem)) {
1931 if (lu_gp_new)
1932 core_alua_put_lu_gp_from_name(lu_gp_new);
1933 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1934 " pointer\n");
1935 return -EINVAL;
1936 }
1937
1938 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1939 lu_gp = lu_gp_mem->lu_gp;
1940 if ((lu_gp)) {
1941 /*
1942 * Clearing an existing lu_gp association, and replacing
1943 * with NULL
1944 */
1945 if (!(lu_gp_new)) {
1946 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1947 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1948 " %hu\n",
1949 config_item_name(&hba->hba_group.cg_item),
1950 config_item_name(&su_dev->se_dev_group.cg_item),
1951 config_item_name(&lu_gp->lu_gp_group.cg_item),
1952 lu_gp->lu_gp_id);
1953
1954 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1955 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1956
1957 return count;
1958 }
1959 /*
1960 * Removing existing association of lu_gp_mem with lu_gp
1961 */
1962 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1963 move = 1;
1964 }
1965 /*
1966 * Associate lu_gp_mem with lu_gp_new.
1967 */
1968 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1969 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1970
1971 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1972 " core/alua/lu_gps/%s, ID: %hu\n",
1973 (move) ? "Moving" : "Adding",
1974 config_item_name(&hba->hba_group.cg_item),
1975 config_item_name(&su_dev->se_dev_group.cg_item),
1976 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1977 lu_gp_new->lu_gp_id);
1978
1979 core_alua_put_lu_gp_from_name(lu_gp_new);
1980 return count;
1981 }
1982
1983 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1984 .attr = { .ca_owner = THIS_MODULE,
1985 .ca_name = "alua_lu_gp",
1986 .ca_mode = S_IRUGO | S_IWUSR },
1987 .show = target_core_show_alua_lu_gp,
1988 .store = target_core_store_alua_lu_gp,
1989 };
1990
1991 static struct configfs_attribute *lio_core_dev_attrs[] = {
1992 &target_core_attr_dev_info.attr,
1993 &target_core_attr_dev_control.attr,
1994 &target_core_attr_dev_alias.attr,
1995 &target_core_attr_dev_udev_path.attr,
1996 &target_core_attr_dev_enable.attr,
1997 &target_core_attr_dev_alua_lu_gp.attr,
1998 NULL,
1999 };
2000
2001 static void target_core_dev_release(struct config_item *item)
2002 {
2003 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2004 struct se_subsystem_dev, se_dev_group);
2005 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2006 struct se_subsystem_api *t = hba->transport;
2007 struct config_group *dev_cg = &se_dev->se_dev_group;
2008
2009 kfree(dev_cg->default_groups);
2010 /*
2011 * This pointer will set when the storage is enabled with:
2012 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2013 */
2014 if (se_dev->se_dev_ptr) {
2015 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
2016 "virtual_device() for se_dev_ptr: %p\n",
2017 se_dev->se_dev_ptr);
2018
2019 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2020 } else {
2021 /*
2022 * Release struct se_subsystem_dev->se_dev_su_ptr..
2023 */
2024 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2025 "device() for se_dev_su_ptr: %p\n",
2026 se_dev->se_dev_su_ptr);
2027
2028 t->free_device(se_dev->se_dev_su_ptr);
2029 }
2030
2031 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2032 "_dev_t: %p\n", se_dev);
2033 kfree(se_dev);
2034 }
2035
2036 static ssize_t target_core_dev_show(struct config_item *item,
2037 struct configfs_attribute *attr,
2038 char *page)
2039 {
2040 struct se_subsystem_dev *se_dev = container_of(
2041 to_config_group(item), struct se_subsystem_dev,
2042 se_dev_group);
2043 struct target_core_configfs_attribute *tc_attr = container_of(
2044 attr, struct target_core_configfs_attribute, attr);
2045
2046 if (!(tc_attr->show))
2047 return -EINVAL;
2048
2049 return tc_attr->show((void *)se_dev, page);
2050 }
2051
2052 static ssize_t target_core_dev_store(struct config_item *item,
2053 struct configfs_attribute *attr,
2054 const char *page, size_t count)
2055 {
2056 struct se_subsystem_dev *se_dev = container_of(
2057 to_config_group(item), struct se_subsystem_dev,
2058 se_dev_group);
2059 struct target_core_configfs_attribute *tc_attr = container_of(
2060 attr, struct target_core_configfs_attribute, attr);
2061
2062 if (!(tc_attr->store))
2063 return -EINVAL;
2064
2065 return tc_attr->store((void *)se_dev, page, count);
2066 }
2067
2068 static struct configfs_item_operations target_core_dev_item_ops = {
2069 .release = target_core_dev_release,
2070 .show_attribute = target_core_dev_show,
2071 .store_attribute = target_core_dev_store,
2072 };
2073
2074 static struct config_item_type target_core_dev_cit = {
2075 .ct_item_ops = &target_core_dev_item_ops,
2076 .ct_attrs = lio_core_dev_attrs,
2077 .ct_owner = THIS_MODULE,
2078 };
2079
2080 /* End functions for struct config_item_type target_core_dev_cit */
2081
2082 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2083
2084 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2085 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2086 static struct target_core_alua_lu_gp_attribute \
2087 target_core_alua_lu_gp_##_name = \
2088 __CONFIGFS_EATTR(_name, _mode, \
2089 target_core_alua_lu_gp_show_attr_##_name, \
2090 target_core_alua_lu_gp_store_attr_##_name);
2091
2092 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2093 static struct target_core_alua_lu_gp_attribute \
2094 target_core_alua_lu_gp_##_name = \
2095 __CONFIGFS_EATTR_RO(_name, \
2096 target_core_alua_lu_gp_show_attr_##_name);
2097
2098 /*
2099 * lu_gp_id
2100 */
2101 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2102 struct t10_alua_lu_gp *lu_gp,
2103 char *page)
2104 {
2105 if (!(lu_gp->lu_gp_valid_id))
2106 return 0;
2107
2108 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2109 }
2110
2111 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2112 struct t10_alua_lu_gp *lu_gp,
2113 const char *page,
2114 size_t count)
2115 {
2116 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2117 unsigned long lu_gp_id;
2118 int ret;
2119
2120 ret = strict_strtoul(page, 0, &lu_gp_id);
2121 if (ret < 0) {
2122 printk(KERN_ERR "strict_strtoul() returned %d for"
2123 " lu_gp_id\n", ret);
2124 return -EINVAL;
2125 }
2126 if (lu_gp_id > 0x0000ffff) {
2127 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2128 " 0x0000ffff\n", lu_gp_id);
2129 return -EINVAL;
2130 }
2131
2132 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2133 if (ret < 0)
2134 return -EINVAL;
2135
2136 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2137 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2138 config_item_name(&alua_lu_gp_cg->cg_item),
2139 lu_gp->lu_gp_id);
2140
2141 return count;
2142 }
2143
2144 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2145
2146 /*
2147 * members
2148 */
2149 static ssize_t target_core_alua_lu_gp_show_attr_members(
2150 struct t10_alua_lu_gp *lu_gp,
2151 char *page)
2152 {
2153 struct se_device *dev;
2154 struct se_hba *hba;
2155 struct se_subsystem_dev *su_dev;
2156 struct t10_alua_lu_gp_member *lu_gp_mem;
2157 ssize_t len = 0, cur_len;
2158 unsigned char buf[LU_GROUP_NAME_BUF];
2159
2160 memset(buf, 0, LU_GROUP_NAME_BUF);
2161
2162 spin_lock(&lu_gp->lu_gp_lock);
2163 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2164 dev = lu_gp_mem->lu_gp_mem_dev;
2165 su_dev = dev->se_sub_dev;
2166 hba = su_dev->se_dev_hba;
2167
2168 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2169 config_item_name(&hba->hba_group.cg_item),
2170 config_item_name(&su_dev->se_dev_group.cg_item));
2171 cur_len++; /* Extra byte for NULL terminator */
2172
2173 if ((cur_len + len) > PAGE_SIZE) {
2174 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2175 "_members buffer\n");
2176 break;
2177 }
2178 memcpy(page+len, buf, cur_len);
2179 len += cur_len;
2180 }
2181 spin_unlock(&lu_gp->lu_gp_lock);
2182
2183 return len;
2184 }
2185
2186 SE_DEV_ALUA_LU_ATTR_RO(members);
2187
2188 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2189
2190 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2191 &target_core_alua_lu_gp_lu_gp_id.attr,
2192 &target_core_alua_lu_gp_members.attr,
2193 NULL,
2194 };
2195
2196 static void target_core_alua_lu_gp_release(struct config_item *item)
2197 {
2198 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2199 struct t10_alua_lu_gp, lu_gp_group);
2200
2201 core_alua_free_lu_gp(lu_gp);
2202 }
2203
2204 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2205 .release = target_core_alua_lu_gp_release,
2206 .show_attribute = target_core_alua_lu_gp_attr_show,
2207 .store_attribute = target_core_alua_lu_gp_attr_store,
2208 };
2209
2210 static struct config_item_type target_core_alua_lu_gp_cit = {
2211 .ct_item_ops = &target_core_alua_lu_gp_ops,
2212 .ct_attrs = target_core_alua_lu_gp_attrs,
2213 .ct_owner = THIS_MODULE,
2214 };
2215
2216 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2217
2218 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2219
2220 static struct config_group *target_core_alua_create_lu_gp(
2221 struct config_group *group,
2222 const char *name)
2223 {
2224 struct t10_alua_lu_gp *lu_gp;
2225 struct config_group *alua_lu_gp_cg = NULL;
2226 struct config_item *alua_lu_gp_ci = NULL;
2227
2228 lu_gp = core_alua_allocate_lu_gp(name, 0);
2229 if (IS_ERR(lu_gp))
2230 return NULL;
2231
2232 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2233 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2234
2235 config_group_init_type_name(alua_lu_gp_cg, name,
2236 &target_core_alua_lu_gp_cit);
2237
2238 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2239 " Group: core/alua/lu_gps/%s\n",
2240 config_item_name(alua_lu_gp_ci));
2241
2242 return alua_lu_gp_cg;
2243
2244 }
2245
2246 static void target_core_alua_drop_lu_gp(
2247 struct config_group *group,
2248 struct config_item *item)
2249 {
2250 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2251 struct t10_alua_lu_gp, lu_gp_group);
2252
2253 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2254 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2255 config_item_name(item), lu_gp->lu_gp_id);
2256 /*
2257 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2258 * -> target_core_alua_lu_gp_release()
2259 */
2260 config_item_put(item);
2261 }
2262
2263 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2264 .make_group = &target_core_alua_create_lu_gp,
2265 .drop_item = &target_core_alua_drop_lu_gp,
2266 };
2267
2268 static struct config_item_type target_core_alua_lu_gps_cit = {
2269 .ct_item_ops = NULL,
2270 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2271 .ct_owner = THIS_MODULE,
2272 };
2273
2274 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2275
2276 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2277
2278 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2279 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2280 static struct target_core_alua_tg_pt_gp_attribute \
2281 target_core_alua_tg_pt_gp_##_name = \
2282 __CONFIGFS_EATTR(_name, _mode, \
2283 target_core_alua_tg_pt_gp_show_attr_##_name, \
2284 target_core_alua_tg_pt_gp_store_attr_##_name);
2285
2286 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2287 static struct target_core_alua_tg_pt_gp_attribute \
2288 target_core_alua_tg_pt_gp_##_name = \
2289 __CONFIGFS_EATTR_RO(_name, \
2290 target_core_alua_tg_pt_gp_show_attr_##_name);
2291
2292 /*
2293 * alua_access_state
2294 */
2295 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2296 struct t10_alua_tg_pt_gp *tg_pt_gp,
2297 char *page)
2298 {
2299 return sprintf(page, "%d\n",
2300 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2301 }
2302
2303 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2304 struct t10_alua_tg_pt_gp *tg_pt_gp,
2305 const char *page,
2306 size_t count)
2307 {
2308 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2309 unsigned long tmp;
2310 int new_state, ret;
2311
2312 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2313 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2314 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2315 return -EINVAL;
2316 }
2317
2318 ret = strict_strtoul(page, 0, &tmp);
2319 if (ret < 0) {
2320 printk("Unable to extract new ALUA access state from"
2321 " %s\n", page);
2322 return -EINVAL;
2323 }
2324 new_state = (int)tmp;
2325
2326 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2327 printk(KERN_ERR "Unable to process implict configfs ALUA"
2328 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2329 return -EINVAL;
2330 }
2331
2332 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2333 NULL, NULL, new_state, 0);
2334 return (!ret) ? count : -EINVAL;
2335 }
2336
2337 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2338
2339 /*
2340 * alua_access_status
2341 */
2342 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2343 struct t10_alua_tg_pt_gp *tg_pt_gp,
2344 char *page)
2345 {
2346 return sprintf(page, "%s\n",
2347 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2348 }
2349
2350 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2351 struct t10_alua_tg_pt_gp *tg_pt_gp,
2352 const char *page,
2353 size_t count)
2354 {
2355 unsigned long tmp;
2356 int new_status, ret;
2357
2358 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2359 printk(KERN_ERR "Unable to do set ALUA access status on non"
2360 " valid tg_pt_gp ID: %hu\n",
2361 tg_pt_gp->tg_pt_gp_valid_id);
2362 return -EINVAL;
2363 }
2364
2365 ret = strict_strtoul(page, 0, &tmp);
2366 if (ret < 0) {
2367 printk(KERN_ERR "Unable to extract new ALUA access status"
2368 " from %s\n", page);
2369 return -EINVAL;
2370 }
2371 new_status = (int)tmp;
2372
2373 if ((new_status != ALUA_STATUS_NONE) &&
2374 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2375 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2376 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2377 new_status);
2378 return -EINVAL;
2379 }
2380
2381 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2382 return count;
2383 }
2384
2385 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2386
2387 /*
2388 * alua_access_type
2389 */
2390 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2391 struct t10_alua_tg_pt_gp *tg_pt_gp,
2392 char *page)
2393 {
2394 return core_alua_show_access_type(tg_pt_gp, page);
2395 }
2396
2397 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2398 struct t10_alua_tg_pt_gp *tg_pt_gp,
2399 const char *page,
2400 size_t count)
2401 {
2402 return core_alua_store_access_type(tg_pt_gp, page, count);
2403 }
2404
2405 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2406
2407 /*
2408 * alua_write_metadata
2409 */
2410 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2411 struct t10_alua_tg_pt_gp *tg_pt_gp,
2412 char *page)
2413 {
2414 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2415 }
2416
2417 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2418 struct t10_alua_tg_pt_gp *tg_pt_gp,
2419 const char *page,
2420 size_t count)
2421 {
2422 unsigned long tmp;
2423 int ret;
2424
2425 ret = strict_strtoul(page, 0, &tmp);
2426 if (ret < 0) {
2427 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2428 return -EINVAL;
2429 }
2430
2431 if ((tmp != 0) && (tmp != 1)) {
2432 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2433 " %lu\n", tmp);
2434 return -EINVAL;
2435 }
2436 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2437
2438 return count;
2439 }
2440
2441 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2442
2443
2444
2445 /*
2446 * nonop_delay_msecs
2447 */
2448 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2449 struct t10_alua_tg_pt_gp *tg_pt_gp,
2450 char *page)
2451 {
2452 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2453
2454 }
2455
2456 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2457 struct t10_alua_tg_pt_gp *tg_pt_gp,
2458 const char *page,
2459 size_t count)
2460 {
2461 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2462 }
2463
2464 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2465
2466 /*
2467 * trans_delay_msecs
2468 */
2469 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2470 struct t10_alua_tg_pt_gp *tg_pt_gp,
2471 char *page)
2472 {
2473 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2474 }
2475
2476 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2477 struct t10_alua_tg_pt_gp *tg_pt_gp,
2478 const char *page,
2479 size_t count)
2480 {
2481 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2482 }
2483
2484 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2485
2486 /*
2487 * preferred
2488 */
2489
2490 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2491 struct t10_alua_tg_pt_gp *tg_pt_gp,
2492 char *page)
2493 {
2494 return core_alua_show_preferred_bit(tg_pt_gp, page);
2495 }
2496
2497 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2498 struct t10_alua_tg_pt_gp *tg_pt_gp,
2499 const char *page,
2500 size_t count)
2501 {
2502 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2503 }
2504
2505 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2506
2507 /*
2508 * tg_pt_gp_id
2509 */
2510 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2511 struct t10_alua_tg_pt_gp *tg_pt_gp,
2512 char *page)
2513 {
2514 if (!(tg_pt_gp->tg_pt_gp_valid_id))
2515 return 0;
2516
2517 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2518 }
2519
2520 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2521 struct t10_alua_tg_pt_gp *tg_pt_gp,
2522 const char *page,
2523 size_t count)
2524 {
2525 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2526 unsigned long tg_pt_gp_id;
2527 int ret;
2528
2529 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2530 if (ret < 0) {
2531 printk(KERN_ERR "strict_strtoul() returned %d for"
2532 " tg_pt_gp_id\n", ret);
2533 return -EINVAL;
2534 }
2535 if (tg_pt_gp_id > 0x0000ffff) {
2536 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2537 " 0x0000ffff\n", tg_pt_gp_id);
2538 return -EINVAL;
2539 }
2540
2541 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2542 if (ret < 0)
2543 return -EINVAL;
2544
2545 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2546 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2547 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2548 tg_pt_gp->tg_pt_gp_id);
2549
2550 return count;
2551 }
2552
2553 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2554
2555 /*
2556 * members
2557 */
2558 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2559 struct t10_alua_tg_pt_gp *tg_pt_gp,
2560 char *page)
2561 {
2562 struct se_port *port;
2563 struct se_portal_group *tpg;
2564 struct se_lun *lun;
2565 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2566 ssize_t len = 0, cur_len;
2567 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2568
2569 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2570
2571 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2572 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2573 tg_pt_gp_mem_list) {
2574 port = tg_pt_gp_mem->tg_pt;
2575 tpg = port->sep_tpg;
2576 lun = port->sep_lun;
2577
2578 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2579 "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2580 TPG_TFO(tpg)->tpg_get_wwn(tpg),
2581 TPG_TFO(tpg)->tpg_get_tag(tpg),
2582 config_item_name(&lun->lun_group.cg_item));
2583 cur_len++; /* Extra byte for NULL terminator */
2584
2585 if ((cur_len + len) > PAGE_SIZE) {
2586 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2587 "_members buffer\n");
2588 break;
2589 }
2590 memcpy(page+len, buf, cur_len);
2591 len += cur_len;
2592 }
2593 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2594
2595 return len;
2596 }
2597
2598 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2599
2600 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2601 tg_pt_gp_group);
2602
2603 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2604 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2605 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2606 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2607 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2608 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2609 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2610 &target_core_alua_tg_pt_gp_preferred.attr,
2611 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2612 &target_core_alua_tg_pt_gp_members.attr,
2613 NULL,
2614 };
2615
2616 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2617 {
2618 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2619 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2620
2621 core_alua_free_tg_pt_gp(tg_pt_gp);
2622 }
2623
2624 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2625 .release = target_core_alua_tg_pt_gp_release,
2626 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2627 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2628 };
2629
2630 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2631 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2632 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2633 .ct_owner = THIS_MODULE,
2634 };
2635
2636 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2637
2638 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2639
2640 static struct config_group *target_core_alua_create_tg_pt_gp(
2641 struct config_group *group,
2642 const char *name)
2643 {
2644 struct t10_alua *alua = container_of(group, struct t10_alua,
2645 alua_tg_pt_gps_group);
2646 struct t10_alua_tg_pt_gp *tg_pt_gp;
2647 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2648 struct config_group *alua_tg_pt_gp_cg = NULL;
2649 struct config_item *alua_tg_pt_gp_ci = NULL;
2650
2651 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2652 if (!(tg_pt_gp))
2653 return NULL;
2654
2655 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2656 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2657
2658 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2659 &target_core_alua_tg_pt_gp_cit);
2660
2661 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2662 " Group: alua/tg_pt_gps/%s\n",
2663 config_item_name(alua_tg_pt_gp_ci));
2664
2665 return alua_tg_pt_gp_cg;
2666 }
2667
2668 static void target_core_alua_drop_tg_pt_gp(
2669 struct config_group *group,
2670 struct config_item *item)
2671 {
2672 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2673 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2674
2675 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2676 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2677 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2678 /*
2679 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2680 * -> target_core_alua_tg_pt_gp_release().
2681 */
2682 config_item_put(item);
2683 }
2684
2685 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2686 .make_group = &target_core_alua_create_tg_pt_gp,
2687 .drop_item = &target_core_alua_drop_tg_pt_gp,
2688 };
2689
2690 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2691 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2692 .ct_owner = THIS_MODULE,
2693 };
2694
2695 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2696
2697 /* Start functions for struct config_item_type target_core_alua_cit */
2698
2699 /*
2700 * target_core_alua_cit is a ConfigFS group that lives under
2701 * /sys/kernel/config/target/core/alua. There are default groups
2702 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2703 * target_core_alua_cit in target_core_init_configfs() below.
2704 */
2705 static struct config_item_type target_core_alua_cit = {
2706 .ct_item_ops = NULL,
2707 .ct_attrs = NULL,
2708 .ct_owner = THIS_MODULE,
2709 };
2710
2711 /* End functions for struct config_item_type target_core_alua_cit */
2712
2713 /* Start functions for struct config_item_type target_core_stat_cit */
2714
2715 static struct config_group *target_core_stat_mkdir(
2716 struct config_group *group,
2717 const char *name)
2718 {
2719 return ERR_PTR(-ENOSYS);
2720 }
2721
2722 static void target_core_stat_rmdir(
2723 struct config_group *group,
2724 struct config_item *item)
2725 {
2726 return;
2727 }
2728
2729 static struct configfs_group_operations target_core_stat_group_ops = {
2730 .make_group = &target_core_stat_mkdir,
2731 .drop_item = &target_core_stat_rmdir,
2732 };
2733
2734 static struct config_item_type target_core_stat_cit = {
2735 .ct_group_ops = &target_core_stat_group_ops,
2736 .ct_owner = THIS_MODULE,
2737 };
2738
2739 /* End functions for struct config_item_type target_core_stat_cit */
2740
2741 /* Start functions for struct config_item_type target_core_hba_cit */
2742
2743 static struct config_group *target_core_make_subdev(
2744 struct config_group *group,
2745 const char *name)
2746 {
2747 struct t10_alua_tg_pt_gp *tg_pt_gp;
2748 struct se_subsystem_dev *se_dev;
2749 struct se_subsystem_api *t;
2750 struct config_item *hba_ci = &group->cg_item;
2751 struct se_hba *hba = item_to_hba(hba_ci);
2752 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2753 struct config_group *dev_stat_grp = NULL;
2754 int errno = -ENOMEM, ret;
2755
2756 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2757 if (ret)
2758 return ERR_PTR(ret);
2759 /*
2760 * Locate the struct se_subsystem_api from parent's struct se_hba.
2761 */
2762 t = hba->transport;
2763
2764 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2765 if (!se_dev) {
2766 printk(KERN_ERR "Unable to allocate memory for"
2767 " struct se_subsystem_dev\n");
2768 goto unlock;
2769 }
2770 INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2771 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2772 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2773 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2774 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2775 spin_lock_init(&se_dev->t10_reservation.registration_lock);
2776 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2777 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2778 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2779 spin_lock_init(&se_dev->se_dev_lock);
2780 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2781 se_dev->t10_wwn.t10_sub_dev = se_dev;
2782 se_dev->t10_alua.t10_sub_dev = se_dev;
2783 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2784
2785 se_dev->se_dev_hba = hba;
2786 dev_cg = &se_dev->se_dev_group;
2787
2788 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2789 GFP_KERNEL);
2790 if (!(dev_cg->default_groups))
2791 goto out;
2792 /*
2793 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2794 * for ->allocate_virtdevice()
2795 *
2796 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2797 * has been called successfully in the next level up in the
2798 * configfs tree for device object's struct config_group.
2799 */
2800 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2801 if (!(se_dev->se_dev_su_ptr)) {
2802 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2803 " from allocate_virtdevice()\n");
2804 goto out;
2805 }
2806 spin_lock(&se_global->g_device_lock);
2807 list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2808 spin_unlock(&se_global->g_device_lock);
2809
2810 config_group_init_type_name(&se_dev->se_dev_group, name,
2811 &target_core_dev_cit);
2812 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2813 &target_core_dev_attrib_cit);
2814 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2815 &target_core_dev_pr_cit);
2816 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2817 &target_core_dev_wwn_cit);
2818 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2819 "alua", &target_core_alua_tg_pt_gps_cit);
2820 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2821 "statistics", &target_core_stat_cit);
2822
2823 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2824 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2825 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2826 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2827 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2828 dev_cg->default_groups[5] = NULL;
2829 /*
2830 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2831 */
2832 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2833 if (!(tg_pt_gp))
2834 goto out;
2835
2836 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2837 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2838 GFP_KERNEL);
2839 if (!(tg_pt_gp_cg->default_groups)) {
2840 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2841 "default_groups\n");
2842 goto out;
2843 }
2844
2845 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2846 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2847 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2848 tg_pt_gp_cg->default_groups[1] = NULL;
2849 T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2850 /*
2851 * Add core/$HBA/$DEV/statistics/ default groups
2852 */
2853 dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2854 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2855 GFP_KERNEL);
2856 if (!dev_stat_grp->default_groups) {
2857 printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n");
2858 goto out;
2859 }
2860 target_stat_setup_dev_default_groups(se_dev);
2861
2862 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2863 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2864
2865 mutex_unlock(&hba->hba_access_mutex);
2866 return &se_dev->se_dev_group;
2867 out:
2868 if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2869 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2870 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2871 }
2872 if (dev_stat_grp)
2873 kfree(dev_stat_grp->default_groups);
2874 if (tg_pt_gp_cg)
2875 kfree(tg_pt_gp_cg->default_groups);
2876 if (dev_cg)
2877 kfree(dev_cg->default_groups);
2878 if (se_dev->se_dev_su_ptr)
2879 t->free_device(se_dev->se_dev_su_ptr);
2880 kfree(se_dev);
2881 unlock:
2882 mutex_unlock(&hba->hba_access_mutex);
2883 return ERR_PTR(errno);
2884 }
2885
2886 static void target_core_drop_subdev(
2887 struct config_group *group,
2888 struct config_item *item)
2889 {
2890 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2891 struct se_subsystem_dev, se_dev_group);
2892 struct se_hba *hba;
2893 struct se_subsystem_api *t;
2894 struct config_item *df_item;
2895 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2896 int i;
2897
2898 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2899
2900 mutex_lock(&hba->hba_access_mutex);
2901 t = hba->transport;
2902
2903 spin_lock(&se_global->g_device_lock);
2904 list_del(&se_dev->g_se_dev_list);
2905 spin_unlock(&se_global->g_device_lock);
2906
2907 dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2908 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2909 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2910 dev_stat_grp->default_groups[i] = NULL;
2911 config_item_put(df_item);
2912 }
2913 kfree(dev_stat_grp->default_groups);
2914
2915 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2916 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2917 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2918 tg_pt_gp_cg->default_groups[i] = NULL;
2919 config_item_put(df_item);
2920 }
2921 kfree(tg_pt_gp_cg->default_groups);
2922 /*
2923 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2924 * directly from target_core_alua_tg_pt_gp_release().
2925 */
2926 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2927
2928 dev_cg = &se_dev->se_dev_group;
2929 for (i = 0; dev_cg->default_groups[i]; i++) {
2930 df_item = &dev_cg->default_groups[i]->cg_item;
2931 dev_cg->default_groups[i] = NULL;
2932 config_item_put(df_item);
2933 }
2934 /*
2935 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2936 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2937 */
2938 config_item_put(item);
2939 mutex_unlock(&hba->hba_access_mutex);
2940 }
2941
2942 static struct configfs_group_operations target_core_hba_group_ops = {
2943 .make_group = target_core_make_subdev,
2944 .drop_item = target_core_drop_subdev,
2945 };
2946
2947 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2948 #define SE_HBA_ATTR(_name, _mode) \
2949 static struct target_core_hba_attribute \
2950 target_core_hba_##_name = \
2951 __CONFIGFS_EATTR(_name, _mode, \
2952 target_core_hba_show_attr_##_name, \
2953 target_core_hba_store_attr_##_name);
2954
2955 #define SE_HBA_ATTR_RO(_name) \
2956 static struct target_core_hba_attribute \
2957 target_core_hba_##_name = \
2958 __CONFIGFS_EATTR_RO(_name, \
2959 target_core_hba_show_attr_##_name);
2960
2961 static ssize_t target_core_hba_show_attr_hba_info(
2962 struct se_hba *hba,
2963 char *page)
2964 {
2965 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2966 hba->hba_id, hba->transport->name,
2967 TARGET_CORE_CONFIGFS_VERSION);
2968 }
2969
2970 SE_HBA_ATTR_RO(hba_info);
2971
2972 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2973 char *page)
2974 {
2975 int hba_mode = 0;
2976
2977 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2978 hba_mode = 1;
2979
2980 return sprintf(page, "%d\n", hba_mode);
2981 }
2982
2983 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2984 const char *page, size_t count)
2985 {
2986 struct se_subsystem_api *transport = hba->transport;
2987 unsigned long mode_flag;
2988 int ret;
2989
2990 if (transport->pmode_enable_hba == NULL)
2991 return -EINVAL;
2992
2993 ret = strict_strtoul(page, 0, &mode_flag);
2994 if (ret < 0) {
2995 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2996 return -EINVAL;
2997 }
2998
2999 spin_lock(&hba->device_lock);
3000 if (!(list_empty(&hba->hba_dev_list))) {
3001 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
3002 spin_unlock(&hba->device_lock);
3003 return -EINVAL;
3004 }
3005 spin_unlock(&hba->device_lock);
3006
3007 ret = transport->pmode_enable_hba(hba, mode_flag);
3008 if (ret < 0)
3009 return -EINVAL;
3010 if (ret > 0)
3011 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3012 else if (ret == 0)
3013 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3014
3015 return count;
3016 }
3017
3018 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3019
3020 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3021
3022 static void target_core_hba_release(struct config_item *item)
3023 {
3024 struct se_hba *hba = container_of(to_config_group(item),
3025 struct se_hba, hba_group);
3026 core_delete_hba(hba);
3027 }
3028
3029 static struct configfs_attribute *target_core_hba_attrs[] = {
3030 &target_core_hba_hba_info.attr,
3031 &target_core_hba_hba_mode.attr,
3032 NULL,
3033 };
3034
3035 static struct configfs_item_operations target_core_hba_item_ops = {
3036 .release = target_core_hba_release,
3037 .show_attribute = target_core_hba_attr_show,
3038 .store_attribute = target_core_hba_attr_store,
3039 };
3040
3041 static struct config_item_type target_core_hba_cit = {
3042 .ct_item_ops = &target_core_hba_item_ops,
3043 .ct_group_ops = &target_core_hba_group_ops,
3044 .ct_attrs = target_core_hba_attrs,
3045 .ct_owner = THIS_MODULE,
3046 };
3047
3048 static struct config_group *target_core_call_addhbatotarget(
3049 struct config_group *group,
3050 const char *name)
3051 {
3052 char *se_plugin_str, *str, *str2;
3053 struct se_hba *hba;
3054 char buf[TARGET_CORE_NAME_MAX_LEN];
3055 unsigned long plugin_dep_id = 0;
3056 int ret;
3057
3058 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3059 if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
3060 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
3061 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3062 TARGET_CORE_NAME_MAX_LEN);
3063 return ERR_PTR(-ENAMETOOLONG);
3064 }
3065 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3066
3067 str = strstr(buf, "_");
3068 if (!(str)) {
3069 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3070 return ERR_PTR(-EINVAL);
3071 }
3072 se_plugin_str = buf;
3073 /*
3074 * Special case for subsystem plugins that have "_" in their names.
3075 * Namely rd_direct and rd_mcp..
3076 */
3077 str2 = strstr(str+1, "_");
3078 if ((str2)) {
3079 *str2 = '\0'; /* Terminate for *se_plugin_str */
3080 str2++; /* Skip to start of plugin dependent ID */
3081 str = str2;
3082 } else {
3083 *str = '\0'; /* Terminate for *se_plugin_str */
3084 str++; /* Skip to start of plugin dependent ID */
3085 }
3086
3087 ret = strict_strtoul(str, 0, &plugin_dep_id);
3088 if (ret < 0) {
3089 printk(KERN_ERR "strict_strtoul() returned %d for"
3090 " plugin_dep_id\n", ret);
3091 return ERR_PTR(-EINVAL);
3092 }
3093 /*
3094 * Load up TCM subsystem plugins if they have not already been loaded.
3095 */
3096 if (transport_subsystem_check_init() < 0)
3097 return ERR_PTR(-EINVAL);
3098
3099 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3100 if (IS_ERR(hba))
3101 return ERR_CAST(hba);
3102
3103 config_group_init_type_name(&hba->hba_group, name,
3104 &target_core_hba_cit);
3105
3106 return &hba->hba_group;
3107 }
3108
3109 static void target_core_call_delhbafromtarget(
3110 struct config_group *group,
3111 struct config_item *item)
3112 {
3113 /*
3114 * core_delete_hba() is called from target_core_hba_item_ops->release()
3115 * -> target_core_hba_release()
3116 */
3117 config_item_put(item);
3118 }
3119
3120 static struct configfs_group_operations target_core_group_ops = {
3121 .make_group = target_core_call_addhbatotarget,
3122 .drop_item = target_core_call_delhbafromtarget,
3123 };
3124
3125 static struct config_item_type target_core_cit = {
3126 .ct_item_ops = NULL,
3127 .ct_group_ops = &target_core_group_ops,
3128 .ct_attrs = NULL,
3129 .ct_owner = THIS_MODULE,
3130 };
3131
3132 /* Stop functions for struct config_item_type target_core_hba_cit */
3133
3134 static int __init target_core_init_configfs(void)
3135 {
3136 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3137 struct config_group *lu_gp_cg = NULL;
3138 struct configfs_subsystem *subsys;
3139 struct t10_alua_lu_gp *lu_gp;
3140 int ret;
3141
3142 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3143 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3144 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3145
3146 subsys = target_core_subsystem[0];
3147 config_group_init(&subsys->su_group);
3148 mutex_init(&subsys->su_mutex);
3149
3150 INIT_LIST_HEAD(&g_tf_list);
3151 mutex_init(&g_tf_lock);
3152 init_scsi_index_table();
3153 ret = init_se_global();
3154 if (ret < 0)
3155 return -1;
3156 /*
3157 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3158 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3159 */
3160 target_cg = &subsys->su_group;
3161 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3162 GFP_KERNEL);
3163 if (!(target_cg->default_groups)) {
3164 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3165 goto out_global;
3166 }
3167
3168 config_group_init_type_name(&se_global->target_core_hbagroup,
3169 "core", &target_core_cit);
3170 target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3171 target_cg->default_groups[1] = NULL;
3172 /*
3173 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3174 */
3175 hba_cg = &se_global->target_core_hbagroup;
3176 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3177 GFP_KERNEL);
3178 if (!(hba_cg->default_groups)) {
3179 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3180 goto out_global;
3181 }
3182 config_group_init_type_name(&se_global->alua_group,
3183 "alua", &target_core_alua_cit);
3184 hba_cg->default_groups[0] = &se_global->alua_group;
3185 hba_cg->default_groups[1] = NULL;
3186 /*
3187 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3188 * groups under /sys/kernel/config/target/core/alua/
3189 */
3190 alua_cg = &se_global->alua_group;
3191 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3192 GFP_KERNEL);
3193 if (!(alua_cg->default_groups)) {
3194 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3195 goto out_global;
3196 }
3197
3198 config_group_init_type_name(&se_global->alua_lu_gps_group,
3199 "lu_gps", &target_core_alua_lu_gps_cit);
3200 alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3201 alua_cg->default_groups[1] = NULL;
3202 /*
3203 * Add core/alua/lu_gps/default_lu_gp
3204 */
3205 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3206 if (IS_ERR(lu_gp))
3207 goto out_global;
3208
3209 lu_gp_cg = &se_global->alua_lu_gps_group;
3210 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3211 GFP_KERNEL);
3212 if (!(lu_gp_cg->default_groups)) {
3213 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3214 goto out_global;
3215 }
3216
3217 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3218 &target_core_alua_lu_gp_cit);
3219 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3220 lu_gp_cg->default_groups[1] = NULL;
3221 se_global->default_lu_gp = lu_gp;
3222 /*
3223 * Register the target_core_mod subsystem with configfs.
3224 */
3225 ret = configfs_register_subsystem(subsys);
3226 if (ret < 0) {
3227 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3228 ret, subsys->su_group.cg_item.ci_namebuf);
3229 goto out_global;
3230 }
3231 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3232 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3233 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3234 /*
3235 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3236 */
3237 ret = rd_module_init();
3238 if (ret < 0)
3239 goto out;
3240
3241 if (core_dev_setup_virtual_lun0() < 0)
3242 goto out;
3243
3244 return 0;
3245
3246 out:
3247 configfs_unregister_subsystem(subsys);
3248 core_dev_release_virtual_lun0();
3249 rd_module_exit();
3250 out_global:
3251 if (se_global->default_lu_gp) {
3252 core_alua_free_lu_gp(se_global->default_lu_gp);
3253 se_global->default_lu_gp = NULL;
3254 }
3255 if (lu_gp_cg)
3256 kfree(lu_gp_cg->default_groups);
3257 if (alua_cg)
3258 kfree(alua_cg->default_groups);
3259 if (hba_cg)
3260 kfree(hba_cg->default_groups);
3261 kfree(target_cg->default_groups);
3262 release_se_global();
3263 return -1;
3264 }
3265
3266 static void __exit target_core_exit_configfs(void)
3267 {
3268 struct configfs_subsystem *subsys;
3269 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3270 struct config_item *item;
3271 int i;
3272
3273 se_global->in_shutdown = 1;
3274 subsys = target_core_subsystem[0];
3275
3276 lu_gp_cg = &se_global->alua_lu_gps_group;
3277 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3278 item = &lu_gp_cg->default_groups[i]->cg_item;
3279 lu_gp_cg->default_groups[i] = NULL;
3280 config_item_put(item);
3281 }
3282 kfree(lu_gp_cg->default_groups);
3283 lu_gp_cg->default_groups = NULL;
3284
3285 alua_cg = &se_global->alua_group;
3286 for (i = 0; alua_cg->default_groups[i]; i++) {
3287 item = &alua_cg->default_groups[i]->cg_item;
3288 alua_cg->default_groups[i] = NULL;
3289 config_item_put(item);
3290 }
3291 kfree(alua_cg->default_groups);
3292 alua_cg->default_groups = NULL;
3293
3294 hba_cg = &se_global->target_core_hbagroup;
3295 for (i = 0; hba_cg->default_groups[i]; i++) {
3296 item = &hba_cg->default_groups[i]->cg_item;
3297 hba_cg->default_groups[i] = NULL;
3298 config_item_put(item);
3299 }
3300 kfree(hba_cg->default_groups);
3301 hba_cg->default_groups = NULL;
3302 /*
3303 * We expect subsys->su_group.default_groups to be released
3304 * by configfs subsystem provider logic..
3305 */
3306 configfs_unregister_subsystem(subsys);
3307 kfree(subsys->su_group.default_groups);
3308
3309 core_alua_free_lu_gp(se_global->default_lu_gp);
3310 se_global->default_lu_gp = NULL;
3311
3312 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3313 " Infrastructure\n");
3314
3315 core_dev_release_virtual_lun0();
3316 rd_module_exit();
3317 release_se_global();
3318
3319 return;
3320 }
3321
3322 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3323 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3324 MODULE_LICENSE("GPL");
3325
3326 module_init(target_core_init_configfs);
3327 module_exit(target_core_exit_configfs);