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ppp: fix pptp double release_sock in pptp_bind()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / target / target_core_configfs.c
blob25c1f49a7d8bae7ee61f20df5830ba5a782277c7
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 NULL;
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 /*
501 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
502 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
503 * target_core_fabric_configfs.c WWN+TPG group context code.
504 */
505 if (!(tfo->fabric_make_wwn)) {
506 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
507 return -EINVAL;
508 }
509 if (!(tfo->fabric_drop_wwn)) {
510 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
511 return -EINVAL;
512 }
513 if (!(tfo->fabric_make_tpg)) {
514 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
515 return -EINVAL;
516 }
517 if (!(tfo->fabric_drop_tpg)) {
518 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
519 return -EINVAL;
520 }
521
522 return 0;
523 }
524
525 /*
526 * Called 2nd from fabric module with returned parameter of
527 * struct target_fabric_configfs * from target_fabric_configfs_init().
528 *
529 * Upon a successful registration, the new fabric's struct config_item is
530 * return. Also, a pointer to this struct is set in the passed
531 * struct target_fabric_configfs.
532 */
533 int target_fabric_configfs_register(
534 struct target_fabric_configfs *tf)
535 {
536 struct config_group *su_group;
537 int ret;
538
539 if (!(tf)) {
540 printk(KERN_ERR "Unable to locate target_fabric_configfs"
541 " pointer\n");
542 return -EINVAL;
543 }
544 if (!(tf->tf_subsys)) {
545 printk(KERN_ERR "Unable to target struct config_subsystem"
546 " pointer\n");
547 return -EINVAL;
548 }
549 su_group = &tf->tf_subsys->su_group;
550 if (!(su_group)) {
551 printk(KERN_ERR "Unable to locate target struct config_group"
552 " pointer\n");
553 return -EINVAL;
554 }
555 ret = target_fabric_tf_ops_check(tf);
556 if (ret < 0)
557 return ret;
558
559 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
560 ">>>>>>>>>>\n");
561 return 0;
562 }
563 EXPORT_SYMBOL(target_fabric_configfs_register);
564
565 void target_fabric_configfs_deregister(
566 struct target_fabric_configfs *tf)
567 {
568 struct config_group *su_group;
569 struct configfs_subsystem *su;
570
571 if (!(tf)) {
572 printk(KERN_ERR "Unable to locate passed target_fabric_"
573 "configfs\n");
574 return;
575 }
576 su = tf->tf_subsys;
577 if (!(su)) {
578 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
579 " pointer\n");
580 return;
581 }
582 su_group = &tf->tf_subsys->su_group;
583 if (!(su_group)) {
584 printk(KERN_ERR "Unable to locate target struct config_group"
585 " pointer\n");
586 return;
587 }
588
589 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
590 ">>>>>>>>>>>>\n");
591 mutex_lock(&g_tf_lock);
592 if (atomic_read(&tf->tf_access_cnt)) {
593 mutex_unlock(&g_tf_lock);
594 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
595 tf->tf_name);
596 BUG();
597 }
598 list_del(&tf->tf_list);
599 mutex_unlock(&g_tf_lock);
600
601 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
602 " %s\n", tf->tf_name);
603 tf->tf_module = NULL;
604 tf->tf_subsys = NULL;
605 kfree(tf);
606
607 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
608 ">>>>>\n");
609 return;
610 }
611 EXPORT_SYMBOL(target_fabric_configfs_deregister);
612
613 /*##############################################################################
614 // Stop functions called by external Target Fabrics Modules
615 //############################################################################*/
616
617 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
618
619 #define DEF_DEV_ATTRIB_SHOW(_name) \
620 static ssize_t target_core_dev_show_attr_##_name( \
621 struct se_dev_attrib *da, \
622 char *page) \
623 { \
624 struct se_device *dev; \
625 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
626 ssize_t rb; \
627 \
628 spin_lock(&se_dev->se_dev_lock); \
629 dev = se_dev->se_dev_ptr; \
630 if (!(dev)) { \
631 spin_unlock(&se_dev->se_dev_lock); \
632 return -ENODEV; \
633 } \
634 rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
635 spin_unlock(&se_dev->se_dev_lock); \
636 \
637 return rb; \
638 }
639
640 #define DEF_DEV_ATTRIB_STORE(_name) \
641 static ssize_t target_core_dev_store_attr_##_name( \
642 struct se_dev_attrib *da, \
643 const char *page, \
644 size_t count) \
645 { \
646 struct se_device *dev; \
647 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
648 unsigned long val; \
649 int ret; \
650 \
651 spin_lock(&se_dev->se_dev_lock); \
652 dev = se_dev->se_dev_ptr; \
653 if (!(dev)) { \
654 spin_unlock(&se_dev->se_dev_lock); \
655 return -ENODEV; \
656 } \
657 ret = strict_strtoul(page, 0, &val); \
658 if (ret < 0) { \
659 spin_unlock(&se_dev->se_dev_lock); \
660 printk(KERN_ERR "strict_strtoul() failed with" \
661 " ret: %d\n", ret); \
662 return -EINVAL; \
663 } \
664 ret = se_dev_set_##_name(dev, (u32)val); \
665 spin_unlock(&se_dev->se_dev_lock); \
666 \
667 return (!ret) ? count : -EINVAL; \
668 }
669
670 #define DEF_DEV_ATTRIB(_name) \
671 DEF_DEV_ATTRIB_SHOW(_name); \
672 DEF_DEV_ATTRIB_STORE(_name);
673
674 #define DEF_DEV_ATTRIB_RO(_name) \
675 DEF_DEV_ATTRIB_SHOW(_name);
676
677 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
678 #define SE_DEV_ATTR(_name, _mode) \
679 static struct target_core_dev_attrib_attribute \
680 target_core_dev_attrib_##_name = \
681 __CONFIGFS_EATTR(_name, _mode, \
682 target_core_dev_show_attr_##_name, \
683 target_core_dev_store_attr_##_name);
684
685 #define SE_DEV_ATTR_RO(_name); \
686 static struct target_core_dev_attrib_attribute \
687 target_core_dev_attrib_##_name = \
688 __CONFIGFS_EATTR_RO(_name, \
689 target_core_dev_show_attr_##_name);
690
691 DEF_DEV_ATTRIB(emulate_dpo);
692 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
693
694 DEF_DEV_ATTRIB(emulate_fua_write);
695 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
696
697 DEF_DEV_ATTRIB(emulate_fua_read);
698 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
699
700 DEF_DEV_ATTRIB(emulate_write_cache);
701 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
702
703 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
704 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
705
706 DEF_DEV_ATTRIB(emulate_tas);
707 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
708
709 DEF_DEV_ATTRIB(emulate_tpu);
710 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
711
712 DEF_DEV_ATTRIB(emulate_tpws);
713 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
714
715 DEF_DEV_ATTRIB(enforce_pr_isids);
716 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
717
718 DEF_DEV_ATTRIB_RO(hw_block_size);
719 SE_DEV_ATTR_RO(hw_block_size);
720
721 DEF_DEV_ATTRIB(block_size);
722 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
723
724 DEF_DEV_ATTRIB_RO(hw_max_sectors);
725 SE_DEV_ATTR_RO(hw_max_sectors);
726
727 DEF_DEV_ATTRIB(max_sectors);
728 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
729
730 DEF_DEV_ATTRIB(optimal_sectors);
731 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
732
733 DEF_DEV_ATTRIB_RO(hw_queue_depth);
734 SE_DEV_ATTR_RO(hw_queue_depth);
735
736 DEF_DEV_ATTRIB(queue_depth);
737 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
738
739 DEF_DEV_ATTRIB(task_timeout);
740 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
741
742 DEF_DEV_ATTRIB(max_unmap_lba_count);
743 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
744
745 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
746 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
747
748 DEF_DEV_ATTRIB(unmap_granularity);
749 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
750
751 DEF_DEV_ATTRIB(unmap_granularity_alignment);
752 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
753
754 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
755
756 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
757 &target_core_dev_attrib_emulate_dpo.attr,
758 &target_core_dev_attrib_emulate_fua_write.attr,
759 &target_core_dev_attrib_emulate_fua_read.attr,
760 &target_core_dev_attrib_emulate_write_cache.attr,
761 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
762 &target_core_dev_attrib_emulate_tas.attr,
763 &target_core_dev_attrib_emulate_tpu.attr,
764 &target_core_dev_attrib_emulate_tpws.attr,
765 &target_core_dev_attrib_enforce_pr_isids.attr,
766 &target_core_dev_attrib_hw_block_size.attr,
767 &target_core_dev_attrib_block_size.attr,
768 &target_core_dev_attrib_hw_max_sectors.attr,
769 &target_core_dev_attrib_max_sectors.attr,
770 &target_core_dev_attrib_optimal_sectors.attr,
771 &target_core_dev_attrib_hw_queue_depth.attr,
772 &target_core_dev_attrib_queue_depth.attr,
773 &target_core_dev_attrib_task_timeout.attr,
774 &target_core_dev_attrib_max_unmap_lba_count.attr,
775 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
776 &target_core_dev_attrib_unmap_granularity.attr,
777 &target_core_dev_attrib_unmap_granularity_alignment.attr,
778 NULL,
779 };
780
781 static struct configfs_item_operations target_core_dev_attrib_ops = {
782 .show_attribute = target_core_dev_attrib_attr_show,
783 .store_attribute = target_core_dev_attrib_attr_store,
784 };
785
786 static struct config_item_type target_core_dev_attrib_cit = {
787 .ct_item_ops = &target_core_dev_attrib_ops,
788 .ct_attrs = target_core_dev_attrib_attrs,
789 .ct_owner = THIS_MODULE,
790 };
791
792 /* End functions for struct config_item_type target_core_dev_attrib_cit */
793
794 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
795
796 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
797 #define SE_DEV_WWN_ATTR(_name, _mode) \
798 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
799 __CONFIGFS_EATTR(_name, _mode, \
800 target_core_dev_wwn_show_attr_##_name, \
801 target_core_dev_wwn_store_attr_##_name);
802
803 #define SE_DEV_WWN_ATTR_RO(_name); \
804 do { \
805 static struct target_core_dev_wwn_attribute \
806 target_core_dev_wwn_##_name = \
807 __CONFIGFS_EATTR_RO(_name, \
808 target_core_dev_wwn_show_attr_##_name); \
809 } while (0);
810
811 /*
812 * VPD page 0x80 Unit serial
813 */
814 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
815 struct t10_wwn *t10_wwn,
816 char *page)
817 {
818 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
819 struct se_device *dev;
820
821 dev = se_dev->se_dev_ptr;
822 if (!(dev))
823 return -ENODEV;
824
825 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
826 &t10_wwn->unit_serial[0]);
827 }
828
829 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
830 struct t10_wwn *t10_wwn,
831 const char *page,
832 size_t count)
833 {
834 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
835 struct se_device *dev;
836 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
837
838 /*
839 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
840 * from the struct scsi_device level firmware, do not allow
841 * VPD Unit Serial to be emulated.
842 *
843 * Note this struct scsi_device could also be emulating VPD
844 * information from its drivers/scsi LLD. But for now we assume
845 * it is doing 'the right thing' wrt a world wide unique
846 * VPD Unit Serial Number that OS dependent multipath can depend on.
847 */
848 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
849 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
850 " Unit Serial, ignoring request\n");
851 return -EOPNOTSUPP;
852 }
853
854 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
855 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
856 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
857 return -EOVERFLOW;
858 }
859 /*
860 * Check to see if any active $FABRIC_MOD exports exist. If they
861 * do exist, fail here as changing this information on the fly
862 * (underneath the initiator side OS dependent multipath code)
863 * could cause negative effects.
864 */
865 dev = su_dev->se_dev_ptr;
866 if ((dev)) {
867 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
868 printk(KERN_ERR "Unable to set VPD Unit Serial while"
869 " active %d $FABRIC_MOD exports exist\n",
870 atomic_read(&dev->dev_export_obj.obj_access_count));
871 return -EINVAL;
872 }
873 }
874 /*
875 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
876 *
877 * Also, strip any newline added from the userspace
878 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
879 */
880 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
881 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
882 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
883 "%s", strstrip(buf));
884 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
885
886 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
887 " %s\n", su_dev->t10_wwn.unit_serial);
888
889 return count;
890 }
891
892 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
893
894 /*
895 * VPD page 0x83 Protocol Identifier
896 */
897 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
898 struct t10_wwn *t10_wwn,
899 char *page)
900 {
901 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
902 struct se_device *dev;
903 struct t10_vpd *vpd;
904 unsigned char buf[VPD_TMP_BUF_SIZE];
905 ssize_t len = 0;
906
907 dev = se_dev->se_dev_ptr;
908 if (!(dev))
909 return -ENODEV;
910
911 memset(buf, 0, VPD_TMP_BUF_SIZE);
912
913 spin_lock(&t10_wwn->t10_vpd_lock);
914 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
915 if (!(vpd->protocol_identifier_set))
916 continue;
917
918 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
919
920 if ((len + strlen(buf) >= PAGE_SIZE))
921 break;
922
923 len += sprintf(page+len, "%s", buf);
924 }
925 spin_unlock(&t10_wwn->t10_vpd_lock);
926
927 return len;
928 }
929
930 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
931 struct t10_wwn *t10_wwn,
932 const char *page,
933 size_t count)
934 {
935 return -ENOSYS;
936 }
937
938 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
939
940 /*
941 * Generic wrapper for dumping VPD identifiers by association.
942 */
943 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
944 static ssize_t target_core_dev_wwn_show_attr_##_name( \
945 struct t10_wwn *t10_wwn, \
946 char *page) \
947 { \
948 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
949 struct se_device *dev; \
950 struct t10_vpd *vpd; \
951 unsigned char buf[VPD_TMP_BUF_SIZE]; \
952 ssize_t len = 0; \
953 \
954 dev = se_dev->se_dev_ptr; \
955 if (!(dev)) \
956 return -ENODEV; \
957 \
958 spin_lock(&t10_wwn->t10_vpd_lock); \
959 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
960 if (vpd->association != _assoc) \
961 continue; \
962 \
963 memset(buf, 0, VPD_TMP_BUF_SIZE); \
964 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
965 if ((len + strlen(buf) >= PAGE_SIZE)) \
966 break; \
967 len += sprintf(page+len, "%s", buf); \
968 \
969 memset(buf, 0, VPD_TMP_BUF_SIZE); \
970 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
971 if ((len + strlen(buf) >= PAGE_SIZE)) \
972 break; \
973 len += sprintf(page+len, "%s", buf); \
974 \
975 memset(buf, 0, VPD_TMP_BUF_SIZE); \
976 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
977 if ((len + strlen(buf) >= PAGE_SIZE)) \
978 break; \
979 len += sprintf(page+len, "%s", buf); \
980 } \
981 spin_unlock(&t10_wwn->t10_vpd_lock); \
982 \
983 return len; \
984 }
985
986 /*
987 * VPD page 0x83 Assoication: Logical Unit
988 */
989 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
990
991 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
992 struct t10_wwn *t10_wwn,
993 const char *page,
994 size_t count)
995 {
996 return -ENOSYS;
997 }
998
999 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1000
1001 /*
1002 * VPD page 0x83 Association: Target Port
1003 */
1004 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1005
1006 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1007 struct t10_wwn *t10_wwn,
1008 const char *page,
1009 size_t count)
1010 {
1011 return -ENOSYS;
1012 }
1013
1014 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1015
1016 /*
1017 * VPD page 0x83 Association: SCSI Target Device
1018 */
1019 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1020
1021 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1022 struct t10_wwn *t10_wwn,
1023 const char *page,
1024 size_t count)
1025 {
1026 return -ENOSYS;
1027 }
1028
1029 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1030
1031 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1032
1033 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1034 &target_core_dev_wwn_vpd_unit_serial.attr,
1035 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1036 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1037 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1038 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1039 NULL,
1040 };
1041
1042 static struct configfs_item_operations target_core_dev_wwn_ops = {
1043 .show_attribute = target_core_dev_wwn_attr_show,
1044 .store_attribute = target_core_dev_wwn_attr_store,
1045 };
1046
1047 static struct config_item_type target_core_dev_wwn_cit = {
1048 .ct_item_ops = &target_core_dev_wwn_ops,
1049 .ct_attrs = target_core_dev_wwn_attrs,
1050 .ct_owner = THIS_MODULE,
1051 };
1052
1053 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1054
1055 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1056
1057 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1058 #define SE_DEV_PR_ATTR(_name, _mode) \
1059 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1060 __CONFIGFS_EATTR(_name, _mode, \
1061 target_core_dev_pr_show_attr_##_name, \
1062 target_core_dev_pr_store_attr_##_name);
1063
1064 #define SE_DEV_PR_ATTR_RO(_name); \
1065 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1066 __CONFIGFS_EATTR_RO(_name, \
1067 target_core_dev_pr_show_attr_##_name);
1068
1069 /*
1070 * res_holder
1071 */
1072 static ssize_t target_core_dev_pr_show_spc3_res(
1073 struct se_device *dev,
1074 char *page,
1075 ssize_t *len)
1076 {
1077 struct se_node_acl *se_nacl;
1078 struct t10_pr_registration *pr_reg;
1079 char i_buf[PR_REG_ISID_ID_LEN];
1080 int prf_isid;
1081
1082 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1083
1084 spin_lock(&dev->dev_reservation_lock);
1085 pr_reg = dev->dev_pr_res_holder;
1086 if (!(pr_reg)) {
1087 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1088 spin_unlock(&dev->dev_reservation_lock);
1089 return *len;
1090 }
1091 se_nacl = pr_reg->pr_reg_nacl;
1092 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1093 PR_REG_ISID_ID_LEN);
1094
1095 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1096 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1097 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1098 spin_unlock(&dev->dev_reservation_lock);
1099
1100 return *len;
1101 }
1102
1103 static ssize_t target_core_dev_pr_show_spc2_res(
1104 struct se_device *dev,
1105 char *page,
1106 ssize_t *len)
1107 {
1108 struct se_node_acl *se_nacl;
1109
1110 spin_lock(&dev->dev_reservation_lock);
1111 se_nacl = dev->dev_reserved_node_acl;
1112 if (!(se_nacl)) {
1113 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1114 spin_unlock(&dev->dev_reservation_lock);
1115 return *len;
1116 }
1117 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1118 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1119 se_nacl->initiatorname);
1120 spin_unlock(&dev->dev_reservation_lock);
1121
1122 return *len;
1123 }
1124
1125 static ssize_t target_core_dev_pr_show_attr_res_holder(
1126 struct se_subsystem_dev *su_dev,
1127 char *page)
1128 {
1129 ssize_t len = 0;
1130
1131 if (!(su_dev->se_dev_ptr))
1132 return -ENODEV;
1133
1134 switch (T10_RES(su_dev)->res_type) {
1135 case SPC3_PERSISTENT_RESERVATIONS:
1136 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1137 page, &len);
1138 break;
1139 case SPC2_RESERVATIONS:
1140 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1141 page, &len);
1142 break;
1143 case SPC_PASSTHROUGH:
1144 len += sprintf(page+len, "Passthrough\n");
1145 break;
1146 default:
1147 len += sprintf(page+len, "Unknown\n");
1148 break;
1149 }
1150
1151 return len;
1152 }
1153
1154 SE_DEV_PR_ATTR_RO(res_holder);
1155
1156 /*
1157 * res_pr_all_tgt_pts
1158 */
1159 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1160 struct se_subsystem_dev *su_dev,
1161 char *page)
1162 {
1163 struct se_device *dev;
1164 struct t10_pr_registration *pr_reg;
1165 ssize_t len = 0;
1166
1167 dev = su_dev->se_dev_ptr;
1168 if (!(dev))
1169 return -ENODEV;
1170
1171 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1172 return len;
1173
1174 spin_lock(&dev->dev_reservation_lock);
1175 pr_reg = dev->dev_pr_res_holder;
1176 if (!(pr_reg)) {
1177 len = sprintf(page, "No SPC-3 Reservation holder\n");
1178 spin_unlock(&dev->dev_reservation_lock);
1179 return len;
1180 }
1181 /*
1182 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1183 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1184 */
1185 if (pr_reg->pr_reg_all_tg_pt)
1186 len = sprintf(page, "SPC-3 Reservation: All Target"
1187 " Ports registration\n");
1188 else
1189 len = sprintf(page, "SPC-3 Reservation: Single"
1190 " Target Port registration\n");
1191 spin_unlock(&dev->dev_reservation_lock);
1192
1193 return len;
1194 }
1195
1196 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1197
1198 /*
1199 * res_pr_generation
1200 */
1201 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1202 struct se_subsystem_dev *su_dev,
1203 char *page)
1204 {
1205 if (!(su_dev->se_dev_ptr))
1206 return -ENODEV;
1207
1208 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1209 return 0;
1210
1211 return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1212 }
1213
1214 SE_DEV_PR_ATTR_RO(res_pr_generation);
1215
1216 /*
1217 * res_pr_holder_tg_port
1218 */
1219 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1220 struct se_subsystem_dev *su_dev,
1221 char *page)
1222 {
1223 struct se_device *dev;
1224 struct se_node_acl *se_nacl;
1225 struct se_lun *lun;
1226 struct se_portal_group *se_tpg;
1227 struct t10_pr_registration *pr_reg;
1228 struct target_core_fabric_ops *tfo;
1229 ssize_t len = 0;
1230
1231 dev = su_dev->se_dev_ptr;
1232 if (!(dev))
1233 return -ENODEV;
1234
1235 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1236 return len;
1237
1238 spin_lock(&dev->dev_reservation_lock);
1239 pr_reg = dev->dev_pr_res_holder;
1240 if (!(pr_reg)) {
1241 len = sprintf(page, "No SPC-3 Reservation holder\n");
1242 spin_unlock(&dev->dev_reservation_lock);
1243 return len;
1244 }
1245 se_nacl = pr_reg->pr_reg_nacl;
1246 se_tpg = se_nacl->se_tpg;
1247 lun = pr_reg->pr_reg_tg_pt_lun;
1248 tfo = TPG_TFO(se_tpg);
1249
1250 len += sprintf(page+len, "SPC-3 Reservation: %s"
1251 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1252 tfo->tpg_get_wwn(se_tpg));
1253 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1254 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1255 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1256 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1257 tfo->get_fabric_name(), lun->unpacked_lun);
1258 spin_unlock(&dev->dev_reservation_lock);
1259
1260 return len;
1261 }
1262
1263 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1264
1265 /*
1266 * res_pr_registered_i_pts
1267 */
1268 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1269 struct se_subsystem_dev *su_dev,
1270 char *page)
1271 {
1272 struct target_core_fabric_ops *tfo;
1273 struct t10_pr_registration *pr_reg;
1274 unsigned char buf[384];
1275 char i_buf[PR_REG_ISID_ID_LEN];
1276 ssize_t len = 0;
1277 int reg_count = 0, prf_isid;
1278
1279 if (!(su_dev->se_dev_ptr))
1280 return -ENODEV;
1281
1282 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1283 return len;
1284
1285 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1286
1287 spin_lock(&T10_RES(su_dev)->registration_lock);
1288 list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1289 pr_reg_list) {
1290
1291 memset(buf, 0, 384);
1292 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1293 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1294 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1295 PR_REG_ISID_ID_LEN);
1296 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1297 tfo->get_fabric_name(),
1298 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1299 &i_buf[0] : "", pr_reg->pr_res_key,
1300 pr_reg->pr_res_generation);
1301
1302 if ((len + strlen(buf) >= PAGE_SIZE))
1303 break;
1304
1305 len += sprintf(page+len, "%s", buf);
1306 reg_count++;
1307 }
1308 spin_unlock(&T10_RES(su_dev)->registration_lock);
1309
1310 if (!(reg_count))
1311 len += sprintf(page+len, "None\n");
1312
1313 return len;
1314 }
1315
1316 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1317
1318 /*
1319 * res_pr_type
1320 */
1321 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1322 struct se_subsystem_dev *su_dev,
1323 char *page)
1324 {
1325 struct se_device *dev;
1326 struct t10_pr_registration *pr_reg;
1327 ssize_t len = 0;
1328
1329 dev = su_dev->se_dev_ptr;
1330 if (!(dev))
1331 return -ENODEV;
1332
1333 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1334 return len;
1335
1336 spin_lock(&dev->dev_reservation_lock);
1337 pr_reg = dev->dev_pr_res_holder;
1338 if (!(pr_reg)) {
1339 len = sprintf(page, "No SPC-3 Reservation holder\n");
1340 spin_unlock(&dev->dev_reservation_lock);
1341 return len;
1342 }
1343 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1344 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1345 spin_unlock(&dev->dev_reservation_lock);
1346
1347 return len;
1348 }
1349
1350 SE_DEV_PR_ATTR_RO(res_pr_type);
1351
1352 /*
1353 * res_type
1354 */
1355 static ssize_t target_core_dev_pr_show_attr_res_type(
1356 struct se_subsystem_dev *su_dev,
1357 char *page)
1358 {
1359 ssize_t len = 0;
1360
1361 if (!(su_dev->se_dev_ptr))
1362 return -ENODEV;
1363
1364 switch (T10_RES(su_dev)->res_type) {
1365 case SPC3_PERSISTENT_RESERVATIONS:
1366 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1367 break;
1368 case SPC2_RESERVATIONS:
1369 len = sprintf(page, "SPC2_RESERVATIONS\n");
1370 break;
1371 case SPC_PASSTHROUGH:
1372 len = sprintf(page, "SPC_PASSTHROUGH\n");
1373 break;
1374 default:
1375 len = sprintf(page, "UNKNOWN\n");
1376 break;
1377 }
1378
1379 return len;
1380 }
1381
1382 SE_DEV_PR_ATTR_RO(res_type);
1383
1384 /*
1385 * res_aptpl_active
1386 */
1387
1388 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1389 struct se_subsystem_dev *su_dev,
1390 char *page)
1391 {
1392 if (!(su_dev->se_dev_ptr))
1393 return -ENODEV;
1394
1395 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1396 return 0;
1397
1398 return sprintf(page, "APTPL Bit Status: %s\n",
1399 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1400 }
1401
1402 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1403
1404 /*
1405 * res_aptpl_metadata
1406 */
1407 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1408 struct se_subsystem_dev *su_dev,
1409 char *page)
1410 {
1411 if (!(su_dev->se_dev_ptr))
1412 return -ENODEV;
1413
1414 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1415 return 0;
1416
1417 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1418 }
1419
1420 enum {
1421 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1422 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1423 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1424 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1425 };
1426
1427 static match_table_t tokens = {
1428 {Opt_initiator_fabric, "initiator_fabric=%s"},
1429 {Opt_initiator_node, "initiator_node=%s"},
1430 {Opt_initiator_sid, "initiator_sid=%s"},
1431 {Opt_sa_res_key, "sa_res_key=%s"},
1432 {Opt_res_holder, "res_holder=%d"},
1433 {Opt_res_type, "res_type=%d"},
1434 {Opt_res_scope, "res_scope=%d"},
1435 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1436 {Opt_mapped_lun, "mapped_lun=%d"},
1437 {Opt_target_fabric, "target_fabric=%s"},
1438 {Opt_target_node, "target_node=%s"},
1439 {Opt_tpgt, "tpgt=%d"},
1440 {Opt_port_rtpi, "port_rtpi=%d"},
1441 {Opt_target_lun, "target_lun=%d"},
1442 {Opt_err, NULL}
1443 };
1444
1445 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1446 struct se_subsystem_dev *su_dev,
1447 const char *page,
1448 size_t count)
1449 {
1450 struct se_device *dev;
1451 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1452 unsigned char *t_fabric = NULL, *t_port = NULL;
1453 char *orig, *ptr, *arg_p, *opts;
1454 substring_t args[MAX_OPT_ARGS];
1455 unsigned long long tmp_ll;
1456 u64 sa_res_key = 0;
1457 u32 mapped_lun = 0, target_lun = 0;
1458 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1459 u16 port_rpti = 0, tpgt = 0;
1460 u8 type = 0, scope;
1461
1462 dev = su_dev->se_dev_ptr;
1463 if (!(dev))
1464 return -ENODEV;
1465
1466 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1467 return 0;
1468
1469 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1470 printk(KERN_INFO "Unable to process APTPL metadata while"
1471 " active fabric exports exist\n");
1472 return -EINVAL;
1473 }
1474
1475 opts = kstrdup(page, GFP_KERNEL);
1476 if (!opts)
1477 return -ENOMEM;
1478
1479 orig = opts;
1480 while ((ptr = strsep(&opts, ",")) != NULL) {
1481 if (!*ptr)
1482 continue;
1483
1484 token = match_token(ptr, tokens, args);
1485 switch (token) {
1486 case Opt_initiator_fabric:
1487 i_fabric = match_strdup(&args[0]);
1488 if (!i_fabric) {
1489 ret = -ENOMEM;
1490 goto out;
1491 }
1492 break;
1493 case Opt_initiator_node:
1494 i_port = match_strdup(&args[0]);
1495 if (!i_port) {
1496 ret = -ENOMEM;
1497 goto out;
1498 }
1499 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1500 printk(KERN_ERR "APTPL metadata initiator_node="
1501 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1502 PR_APTPL_MAX_IPORT_LEN);
1503 ret = -EINVAL;
1504 break;
1505 }
1506 break;
1507 case Opt_initiator_sid:
1508 isid = match_strdup(&args[0]);
1509 if (!isid) {
1510 ret = -ENOMEM;
1511 goto out;
1512 }
1513 if (strlen(isid) >= PR_REG_ISID_LEN) {
1514 printk(KERN_ERR "APTPL metadata initiator_isid"
1515 "= exceeds PR_REG_ISID_LEN: %d\n",
1516 PR_REG_ISID_LEN);
1517 ret = -EINVAL;
1518 break;
1519 }
1520 break;
1521 case Opt_sa_res_key:
1522 arg_p = match_strdup(&args[0]);
1523 if (!arg_p) {
1524 ret = -ENOMEM;
1525 goto out;
1526 }
1527 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1528 if (ret < 0) {
1529 printk(KERN_ERR "strict_strtoull() failed for"
1530 " sa_res_key=\n");
1531 goto out;
1532 }
1533 sa_res_key = (u64)tmp_ll;
1534 break;
1535 /*
1536 * PR APTPL Metadata for Reservation
1537 */
1538 case Opt_res_holder:
1539 match_int(args, &arg);
1540 res_holder = arg;
1541 break;
1542 case Opt_res_type:
1543 match_int(args, &arg);
1544 type = (u8)arg;
1545 break;
1546 case Opt_res_scope:
1547 match_int(args, &arg);
1548 scope = (u8)arg;
1549 break;
1550 case Opt_res_all_tg_pt:
1551 match_int(args, &arg);
1552 all_tg_pt = (int)arg;
1553 break;
1554 case Opt_mapped_lun:
1555 match_int(args, &arg);
1556 mapped_lun = (u32)arg;
1557 break;
1558 /*
1559 * PR APTPL Metadata for Target Port
1560 */
1561 case Opt_target_fabric:
1562 t_fabric = match_strdup(&args[0]);
1563 if (!t_fabric) {
1564 ret = -ENOMEM;
1565 goto out;
1566 }
1567 break;
1568 case Opt_target_node:
1569 t_port = match_strdup(&args[0]);
1570 if (!t_port) {
1571 ret = -ENOMEM;
1572 goto out;
1573 }
1574 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1575 printk(KERN_ERR "APTPL metadata target_node="
1576 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1577 PR_APTPL_MAX_TPORT_LEN);
1578 ret = -EINVAL;
1579 break;
1580 }
1581 break;
1582 case Opt_tpgt:
1583 match_int(args, &arg);
1584 tpgt = (u16)arg;
1585 break;
1586 case Opt_port_rtpi:
1587 match_int(args, &arg);
1588 port_rpti = (u16)arg;
1589 break;
1590 case Opt_target_lun:
1591 match_int(args, &arg);
1592 target_lun = (u32)arg;
1593 break;
1594 default:
1595 break;
1596 }
1597 }
1598
1599 if (!(i_port) || !(t_port) || !(sa_res_key)) {
1600 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1601 ret = -EINVAL;
1602 goto out;
1603 }
1604
1605 if (res_holder && !(type)) {
1606 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1607 " holder\n", type);
1608 ret = -EINVAL;
1609 goto out;
1610 }
1611
1612 ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1613 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1614 res_holder, all_tg_pt, type);
1615 out:
1616 kfree(i_fabric);
1617 kfree(i_port);
1618 kfree(isid);
1619 kfree(t_fabric);
1620 kfree(t_port);
1621 kfree(orig);
1622 return (ret == 0) ? count : ret;
1623 }
1624
1625 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1626
1627 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1628
1629 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1630 &target_core_dev_pr_res_holder.attr,
1631 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1632 &target_core_dev_pr_res_pr_generation.attr,
1633 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1634 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1635 &target_core_dev_pr_res_pr_type.attr,
1636 &target_core_dev_pr_res_type.attr,
1637 &target_core_dev_pr_res_aptpl_active.attr,
1638 &target_core_dev_pr_res_aptpl_metadata.attr,
1639 NULL,
1640 };
1641
1642 static struct configfs_item_operations target_core_dev_pr_ops = {
1643 .show_attribute = target_core_dev_pr_attr_show,
1644 .store_attribute = target_core_dev_pr_attr_store,
1645 };
1646
1647 static struct config_item_type target_core_dev_pr_cit = {
1648 .ct_item_ops = &target_core_dev_pr_ops,
1649 .ct_attrs = target_core_dev_pr_attrs,
1650 .ct_owner = THIS_MODULE,
1651 };
1652
1653 /* End functions for struct config_item_type target_core_dev_pr_cit */
1654
1655 /* Start functions for struct config_item_type target_core_dev_cit */
1656
1657 static ssize_t target_core_show_dev_info(void *p, char *page)
1658 {
1659 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1660 struct se_hba *hba = se_dev->se_dev_hba;
1661 struct se_subsystem_api *t = hba->transport;
1662 int bl = 0;
1663 ssize_t read_bytes = 0;
1664
1665 if (!(se_dev->se_dev_ptr))
1666 return -ENODEV;
1667
1668 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1669 read_bytes += bl;
1670 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1671 return read_bytes;
1672 }
1673
1674 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1675 .attr = { .ca_owner = THIS_MODULE,
1676 .ca_name = "info",
1677 .ca_mode = S_IRUGO },
1678 .show = target_core_show_dev_info,
1679 .store = NULL,
1680 };
1681
1682 static ssize_t target_core_store_dev_control(
1683 void *p,
1684 const char *page,
1685 size_t count)
1686 {
1687 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1688 struct se_hba *hba = se_dev->se_dev_hba;
1689 struct se_subsystem_api *t = hba->transport;
1690
1691 if (!(se_dev->se_dev_su_ptr)) {
1692 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1693 "_dev_su_ptr\n");
1694 return -EINVAL;
1695 }
1696
1697 return t->set_configfs_dev_params(hba, se_dev, page, count);
1698 }
1699
1700 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1701 .attr = { .ca_owner = THIS_MODULE,
1702 .ca_name = "control",
1703 .ca_mode = S_IWUSR },
1704 .show = NULL,
1705 .store = target_core_store_dev_control,
1706 };
1707
1708 static ssize_t target_core_show_dev_alias(void *p, char *page)
1709 {
1710 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1711
1712 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1713 return 0;
1714
1715 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1716 }
1717
1718 static ssize_t target_core_store_dev_alias(
1719 void *p,
1720 const char *page,
1721 size_t count)
1722 {
1723 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1724 struct se_hba *hba = se_dev->se_dev_hba;
1725 ssize_t read_bytes;
1726
1727 if (count > (SE_DEV_ALIAS_LEN-1)) {
1728 printk(KERN_ERR "alias count: %d exceeds"
1729 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1730 SE_DEV_ALIAS_LEN-1);
1731 return -EINVAL;
1732 }
1733
1734 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1735 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1736 "%s", page);
1737
1738 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1739 config_item_name(&hba->hba_group.cg_item),
1740 config_item_name(&se_dev->se_dev_group.cg_item),
1741 se_dev->se_dev_alias);
1742
1743 return read_bytes;
1744 }
1745
1746 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1747 .attr = { .ca_owner = THIS_MODULE,
1748 .ca_name = "alias",
1749 .ca_mode = S_IRUGO | S_IWUSR },
1750 .show = target_core_show_dev_alias,
1751 .store = target_core_store_dev_alias,
1752 };
1753
1754 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1755 {
1756 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1757
1758 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1759 return 0;
1760
1761 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1762 }
1763
1764 static ssize_t target_core_store_dev_udev_path(
1765 void *p,
1766 const char *page,
1767 size_t count)
1768 {
1769 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1770 struct se_hba *hba = se_dev->se_dev_hba;
1771 ssize_t read_bytes;
1772
1773 if (count > (SE_UDEV_PATH_LEN-1)) {
1774 printk(KERN_ERR "udev_path count: %d exceeds"
1775 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1776 SE_UDEV_PATH_LEN-1);
1777 return -EINVAL;
1778 }
1779
1780 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1781 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1782 "%s", page);
1783
1784 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1785 config_item_name(&hba->hba_group.cg_item),
1786 config_item_name(&se_dev->se_dev_group.cg_item),
1787 se_dev->se_dev_udev_path);
1788
1789 return read_bytes;
1790 }
1791
1792 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1793 .attr = { .ca_owner = THIS_MODULE,
1794 .ca_name = "udev_path",
1795 .ca_mode = S_IRUGO | S_IWUSR },
1796 .show = target_core_show_dev_udev_path,
1797 .store = target_core_store_dev_udev_path,
1798 };
1799
1800 static ssize_t target_core_store_dev_enable(
1801 void *p,
1802 const char *page,
1803 size_t count)
1804 {
1805 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1806 struct se_device *dev;
1807 struct se_hba *hba = se_dev->se_dev_hba;
1808 struct se_subsystem_api *t = hba->transport;
1809 char *ptr;
1810
1811 ptr = strstr(page, "1");
1812 if (!(ptr)) {
1813 printk(KERN_ERR "For dev_enable ops, only valid value"
1814 " is \"1\"\n");
1815 return -EINVAL;
1816 }
1817 if ((se_dev->se_dev_ptr)) {
1818 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1819 " object\n");
1820 return -EEXIST;
1821 }
1822
1823 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1824 return -EINVAL;
1825
1826 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1827 if (IS_ERR(dev))
1828 return PTR_ERR(dev);
1829 else if (!dev)
1830 return -EINVAL;
1831
1832 se_dev->se_dev_ptr = dev;
1833 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1834 " %p\n", se_dev->se_dev_ptr);
1835
1836 return count;
1837 }
1838
1839 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1840 .attr = { .ca_owner = THIS_MODULE,
1841 .ca_name = "enable",
1842 .ca_mode = S_IWUSR },
1843 .show = NULL,
1844 .store = target_core_store_dev_enable,
1845 };
1846
1847 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1848 {
1849 struct se_device *dev;
1850 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1851 struct config_item *lu_ci;
1852 struct t10_alua_lu_gp *lu_gp;
1853 struct t10_alua_lu_gp_member *lu_gp_mem;
1854 ssize_t len = 0;
1855
1856 dev = su_dev->se_dev_ptr;
1857 if (!(dev))
1858 return -ENODEV;
1859
1860 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1861 return len;
1862
1863 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1864 if (!(lu_gp_mem)) {
1865 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1866 " pointer\n");
1867 return -EINVAL;
1868 }
1869
1870 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1871 lu_gp = lu_gp_mem->lu_gp;
1872 if ((lu_gp)) {
1873 lu_ci = &lu_gp->lu_gp_group.cg_item;
1874 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1875 config_item_name(lu_ci), lu_gp->lu_gp_id);
1876 }
1877 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1878
1879 return len;
1880 }
1881
1882 static ssize_t target_core_store_alua_lu_gp(
1883 void *p,
1884 const char *page,
1885 size_t count)
1886 {
1887 struct se_device *dev;
1888 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1889 struct se_hba *hba = su_dev->se_dev_hba;
1890 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1891 struct t10_alua_lu_gp_member *lu_gp_mem;
1892 unsigned char buf[LU_GROUP_NAME_BUF];
1893 int move = 0;
1894
1895 dev = su_dev->se_dev_ptr;
1896 if (!(dev))
1897 return -ENODEV;
1898
1899 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1900 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1901 config_item_name(&hba->hba_group.cg_item),
1902 config_item_name(&su_dev->se_dev_group.cg_item));
1903 return -EINVAL;
1904 }
1905 if (count > LU_GROUP_NAME_BUF) {
1906 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1907 return -EINVAL;
1908 }
1909 memset(buf, 0, LU_GROUP_NAME_BUF);
1910 memcpy(buf, page, count);
1911 /*
1912 * Any ALUA logical unit alias besides "NULL" means we will be
1913 * making a new group association.
1914 */
1915 if (strcmp(strstrip(buf), "NULL")) {
1916 /*
1917 * core_alua_get_lu_gp_by_name() will increment reference to
1918 * struct t10_alua_lu_gp. This reference is released with
1919 * core_alua_get_lu_gp_by_name below().
1920 */
1921 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1922 if (!(lu_gp_new))
1923 return -ENODEV;
1924 }
1925 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1926 if (!(lu_gp_mem)) {
1927 if (lu_gp_new)
1928 core_alua_put_lu_gp_from_name(lu_gp_new);
1929 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1930 " pointer\n");
1931 return -EINVAL;
1932 }
1933
1934 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1935 lu_gp = lu_gp_mem->lu_gp;
1936 if ((lu_gp)) {
1937 /*
1938 * Clearing an existing lu_gp association, and replacing
1939 * with NULL
1940 */
1941 if (!(lu_gp_new)) {
1942 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1943 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1944 " %hu\n",
1945 config_item_name(&hba->hba_group.cg_item),
1946 config_item_name(&su_dev->se_dev_group.cg_item),
1947 config_item_name(&lu_gp->lu_gp_group.cg_item),
1948 lu_gp->lu_gp_id);
1949
1950 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1951 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1952
1953 return count;
1954 }
1955 /*
1956 * Removing existing association of lu_gp_mem with lu_gp
1957 */
1958 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1959 move = 1;
1960 }
1961 /*
1962 * Associate lu_gp_mem with lu_gp_new.
1963 */
1964 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1965 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1966
1967 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1968 " core/alua/lu_gps/%s, ID: %hu\n",
1969 (move) ? "Moving" : "Adding",
1970 config_item_name(&hba->hba_group.cg_item),
1971 config_item_name(&su_dev->se_dev_group.cg_item),
1972 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1973 lu_gp_new->lu_gp_id);
1974
1975 core_alua_put_lu_gp_from_name(lu_gp_new);
1976 return count;
1977 }
1978
1979 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1980 .attr = { .ca_owner = THIS_MODULE,
1981 .ca_name = "alua_lu_gp",
1982 .ca_mode = S_IRUGO | S_IWUSR },
1983 .show = target_core_show_alua_lu_gp,
1984 .store = target_core_store_alua_lu_gp,
1985 };
1986
1987 static struct configfs_attribute *lio_core_dev_attrs[] = {
1988 &target_core_attr_dev_info.attr,
1989 &target_core_attr_dev_control.attr,
1990 &target_core_attr_dev_alias.attr,
1991 &target_core_attr_dev_udev_path.attr,
1992 &target_core_attr_dev_enable.attr,
1993 &target_core_attr_dev_alua_lu_gp.attr,
1994 NULL,
1995 };
1996
1997 static void target_core_dev_release(struct config_item *item)
1998 {
1999 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2000 struct se_subsystem_dev, se_dev_group);
2001 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2002 struct se_subsystem_api *t = hba->transport;
2003 struct config_group *dev_cg = &se_dev->se_dev_group;
2004
2005 kfree(dev_cg->default_groups);
2006 /*
2007 * This pointer will set when the storage is enabled with:
2008 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2009 */
2010 if (se_dev->se_dev_ptr) {
2011 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
2012 "virtual_device() for se_dev_ptr: %p\n",
2013 se_dev->se_dev_ptr);
2014
2015 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2016 } else {
2017 /*
2018 * Release struct se_subsystem_dev->se_dev_su_ptr..
2019 */
2020 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2021 "device() for se_dev_su_ptr: %p\n",
2022 se_dev->se_dev_su_ptr);
2023
2024 t->free_device(se_dev->se_dev_su_ptr);
2025 }
2026
2027 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2028 "_dev_t: %p\n", se_dev);
2029 kfree(se_dev);
2030 }
2031
2032 static ssize_t target_core_dev_show(struct config_item *item,
2033 struct configfs_attribute *attr,
2034 char *page)
2035 {
2036 struct se_subsystem_dev *se_dev = container_of(
2037 to_config_group(item), struct se_subsystem_dev,
2038 se_dev_group);
2039 struct target_core_configfs_attribute *tc_attr = container_of(
2040 attr, struct target_core_configfs_attribute, attr);
2041
2042 if (!(tc_attr->show))
2043 return -EINVAL;
2044
2045 return tc_attr->show((void *)se_dev, page);
2046 }
2047
2048 static ssize_t target_core_dev_store(struct config_item *item,
2049 struct configfs_attribute *attr,
2050 const char *page, size_t count)
2051 {
2052 struct se_subsystem_dev *se_dev = container_of(
2053 to_config_group(item), struct se_subsystem_dev,
2054 se_dev_group);
2055 struct target_core_configfs_attribute *tc_attr = container_of(
2056 attr, struct target_core_configfs_attribute, attr);
2057
2058 if (!(tc_attr->store))
2059 return -EINVAL;
2060
2061 return tc_attr->store((void *)se_dev, page, count);
2062 }
2063
2064 static struct configfs_item_operations target_core_dev_item_ops = {
2065 .release = target_core_dev_release,
2066 .show_attribute = target_core_dev_show,
2067 .store_attribute = target_core_dev_store,
2068 };
2069
2070 static struct config_item_type target_core_dev_cit = {
2071 .ct_item_ops = &target_core_dev_item_ops,
2072 .ct_attrs = lio_core_dev_attrs,
2073 .ct_owner = THIS_MODULE,
2074 };
2075
2076 /* End functions for struct config_item_type target_core_dev_cit */
2077
2078 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2079
2080 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2081 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2082 static struct target_core_alua_lu_gp_attribute \
2083 target_core_alua_lu_gp_##_name = \
2084 __CONFIGFS_EATTR(_name, _mode, \
2085 target_core_alua_lu_gp_show_attr_##_name, \
2086 target_core_alua_lu_gp_store_attr_##_name);
2087
2088 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2089 static struct target_core_alua_lu_gp_attribute \
2090 target_core_alua_lu_gp_##_name = \
2091 __CONFIGFS_EATTR_RO(_name, \
2092 target_core_alua_lu_gp_show_attr_##_name);
2093
2094 /*
2095 * lu_gp_id
2096 */
2097 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2098 struct t10_alua_lu_gp *lu_gp,
2099 char *page)
2100 {
2101 if (!(lu_gp->lu_gp_valid_id))
2102 return 0;
2103
2104 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2105 }
2106
2107 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2108 struct t10_alua_lu_gp *lu_gp,
2109 const char *page,
2110 size_t count)
2111 {
2112 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2113 unsigned long lu_gp_id;
2114 int ret;
2115
2116 ret = strict_strtoul(page, 0, &lu_gp_id);
2117 if (ret < 0) {
2118 printk(KERN_ERR "strict_strtoul() returned %d for"
2119 " lu_gp_id\n", ret);
2120 return -EINVAL;
2121 }
2122 if (lu_gp_id > 0x0000ffff) {
2123 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2124 " 0x0000ffff\n", lu_gp_id);
2125 return -EINVAL;
2126 }
2127
2128 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2129 if (ret < 0)
2130 return -EINVAL;
2131
2132 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2133 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2134 config_item_name(&alua_lu_gp_cg->cg_item),
2135 lu_gp->lu_gp_id);
2136
2137 return count;
2138 }
2139
2140 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2141
2142 /*
2143 * members
2144 */
2145 static ssize_t target_core_alua_lu_gp_show_attr_members(
2146 struct t10_alua_lu_gp *lu_gp,
2147 char *page)
2148 {
2149 struct se_device *dev;
2150 struct se_hba *hba;
2151 struct se_subsystem_dev *su_dev;
2152 struct t10_alua_lu_gp_member *lu_gp_mem;
2153 ssize_t len = 0, cur_len;
2154 unsigned char buf[LU_GROUP_NAME_BUF];
2155
2156 memset(buf, 0, LU_GROUP_NAME_BUF);
2157
2158 spin_lock(&lu_gp->lu_gp_lock);
2159 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2160 dev = lu_gp_mem->lu_gp_mem_dev;
2161 su_dev = dev->se_sub_dev;
2162 hba = su_dev->se_dev_hba;
2163
2164 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2165 config_item_name(&hba->hba_group.cg_item),
2166 config_item_name(&su_dev->se_dev_group.cg_item));
2167 cur_len++; /* Extra byte for NULL terminator */
2168
2169 if ((cur_len + len) > PAGE_SIZE) {
2170 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2171 "_members buffer\n");
2172 break;
2173 }
2174 memcpy(page+len, buf, cur_len);
2175 len += cur_len;
2176 }
2177 spin_unlock(&lu_gp->lu_gp_lock);
2178
2179 return len;
2180 }
2181
2182 SE_DEV_ALUA_LU_ATTR_RO(members);
2183
2184 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2185
2186 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2187 &target_core_alua_lu_gp_lu_gp_id.attr,
2188 &target_core_alua_lu_gp_members.attr,
2189 NULL,
2190 };
2191
2192 static void target_core_alua_lu_gp_release(struct config_item *item)
2193 {
2194 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2195 struct t10_alua_lu_gp, lu_gp_group);
2196
2197 core_alua_free_lu_gp(lu_gp);
2198 }
2199
2200 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2201 .release = target_core_alua_lu_gp_release,
2202 .show_attribute = target_core_alua_lu_gp_attr_show,
2203 .store_attribute = target_core_alua_lu_gp_attr_store,
2204 };
2205
2206 static struct config_item_type target_core_alua_lu_gp_cit = {
2207 .ct_item_ops = &target_core_alua_lu_gp_ops,
2208 .ct_attrs = target_core_alua_lu_gp_attrs,
2209 .ct_owner = THIS_MODULE,
2210 };
2211
2212 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2213
2214 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2215
2216 static struct config_group *target_core_alua_create_lu_gp(
2217 struct config_group *group,
2218 const char *name)
2219 {
2220 struct t10_alua_lu_gp *lu_gp;
2221 struct config_group *alua_lu_gp_cg = NULL;
2222 struct config_item *alua_lu_gp_ci = NULL;
2223
2224 lu_gp = core_alua_allocate_lu_gp(name, 0);
2225 if (IS_ERR(lu_gp))
2226 return NULL;
2227
2228 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2229 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2230
2231 config_group_init_type_name(alua_lu_gp_cg, name,
2232 &target_core_alua_lu_gp_cit);
2233
2234 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2235 " Group: core/alua/lu_gps/%s\n",
2236 config_item_name(alua_lu_gp_ci));
2237
2238 return alua_lu_gp_cg;
2239
2240 }
2241
2242 static void target_core_alua_drop_lu_gp(
2243 struct config_group *group,
2244 struct config_item *item)
2245 {
2246 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2247 struct t10_alua_lu_gp, lu_gp_group);
2248
2249 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2250 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2251 config_item_name(item), lu_gp->lu_gp_id);
2252 /*
2253 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2254 * -> target_core_alua_lu_gp_release()
2255 */
2256 config_item_put(item);
2257 }
2258
2259 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2260 .make_group = &target_core_alua_create_lu_gp,
2261 .drop_item = &target_core_alua_drop_lu_gp,
2262 };
2263
2264 static struct config_item_type target_core_alua_lu_gps_cit = {
2265 .ct_item_ops = NULL,
2266 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2267 .ct_owner = THIS_MODULE,
2268 };
2269
2270 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2271
2272 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2273
2274 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2275 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2276 static struct target_core_alua_tg_pt_gp_attribute \
2277 target_core_alua_tg_pt_gp_##_name = \
2278 __CONFIGFS_EATTR(_name, _mode, \
2279 target_core_alua_tg_pt_gp_show_attr_##_name, \
2280 target_core_alua_tg_pt_gp_store_attr_##_name);
2281
2282 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2283 static struct target_core_alua_tg_pt_gp_attribute \
2284 target_core_alua_tg_pt_gp_##_name = \
2285 __CONFIGFS_EATTR_RO(_name, \
2286 target_core_alua_tg_pt_gp_show_attr_##_name);
2287
2288 /*
2289 * alua_access_state
2290 */
2291 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2292 struct t10_alua_tg_pt_gp *tg_pt_gp,
2293 char *page)
2294 {
2295 return sprintf(page, "%d\n",
2296 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2297 }
2298
2299 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2300 struct t10_alua_tg_pt_gp *tg_pt_gp,
2301 const char *page,
2302 size_t count)
2303 {
2304 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2305 unsigned long tmp;
2306 int new_state, ret;
2307
2308 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2309 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2310 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2311 return -EINVAL;
2312 }
2313
2314 ret = strict_strtoul(page, 0, &tmp);
2315 if (ret < 0) {
2316 printk("Unable to extract new ALUA access state from"
2317 " %s\n", page);
2318 return -EINVAL;
2319 }
2320 new_state = (int)tmp;
2321
2322 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2323 printk(KERN_ERR "Unable to process implict configfs ALUA"
2324 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2325 return -EINVAL;
2326 }
2327
2328 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2329 NULL, NULL, new_state, 0);
2330 return (!ret) ? count : -EINVAL;
2331 }
2332
2333 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2334
2335 /*
2336 * alua_access_status
2337 */
2338 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2339 struct t10_alua_tg_pt_gp *tg_pt_gp,
2340 char *page)
2341 {
2342 return sprintf(page, "%s\n",
2343 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2344 }
2345
2346 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2347 struct t10_alua_tg_pt_gp *tg_pt_gp,
2348 const char *page,
2349 size_t count)
2350 {
2351 unsigned long tmp;
2352 int new_status, ret;
2353
2354 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2355 printk(KERN_ERR "Unable to do set ALUA access status on non"
2356 " valid tg_pt_gp ID: %hu\n",
2357 tg_pt_gp->tg_pt_gp_valid_id);
2358 return -EINVAL;
2359 }
2360
2361 ret = strict_strtoul(page, 0, &tmp);
2362 if (ret < 0) {
2363 printk(KERN_ERR "Unable to extract new ALUA access status"
2364 " from %s\n", page);
2365 return -EINVAL;
2366 }
2367 new_status = (int)tmp;
2368
2369 if ((new_status != ALUA_STATUS_NONE) &&
2370 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2371 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2372 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2373 new_status);
2374 return -EINVAL;
2375 }
2376
2377 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2378 return count;
2379 }
2380
2381 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2382
2383 /*
2384 * alua_access_type
2385 */
2386 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2387 struct t10_alua_tg_pt_gp *tg_pt_gp,
2388 char *page)
2389 {
2390 return core_alua_show_access_type(tg_pt_gp, page);
2391 }
2392
2393 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2394 struct t10_alua_tg_pt_gp *tg_pt_gp,
2395 const char *page,
2396 size_t count)
2397 {
2398 return core_alua_store_access_type(tg_pt_gp, page, count);
2399 }
2400
2401 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2402
2403 /*
2404 * alua_write_metadata
2405 */
2406 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2407 struct t10_alua_tg_pt_gp *tg_pt_gp,
2408 char *page)
2409 {
2410 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2411 }
2412
2413 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2414 struct t10_alua_tg_pt_gp *tg_pt_gp,
2415 const char *page,
2416 size_t count)
2417 {
2418 unsigned long tmp;
2419 int ret;
2420
2421 ret = strict_strtoul(page, 0, &tmp);
2422 if (ret < 0) {
2423 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2424 return -EINVAL;
2425 }
2426
2427 if ((tmp != 0) && (tmp != 1)) {
2428 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2429 " %lu\n", tmp);
2430 return -EINVAL;
2431 }
2432 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2433
2434 return count;
2435 }
2436
2437 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2438
2439
2440
2441 /*
2442 * nonop_delay_msecs
2443 */
2444 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2445 struct t10_alua_tg_pt_gp *tg_pt_gp,
2446 char *page)
2447 {
2448 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2449
2450 }
2451
2452 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2453 struct t10_alua_tg_pt_gp *tg_pt_gp,
2454 const char *page,
2455 size_t count)
2456 {
2457 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2458 }
2459
2460 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2461
2462 /*
2463 * trans_delay_msecs
2464 */
2465 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2466 struct t10_alua_tg_pt_gp *tg_pt_gp,
2467 char *page)
2468 {
2469 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2470 }
2471
2472 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2473 struct t10_alua_tg_pt_gp *tg_pt_gp,
2474 const char *page,
2475 size_t count)
2476 {
2477 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2478 }
2479
2480 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2481
2482 /*
2483 * preferred
2484 */
2485
2486 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2487 struct t10_alua_tg_pt_gp *tg_pt_gp,
2488 char *page)
2489 {
2490 return core_alua_show_preferred_bit(tg_pt_gp, page);
2491 }
2492
2493 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2494 struct t10_alua_tg_pt_gp *tg_pt_gp,
2495 const char *page,
2496 size_t count)
2497 {
2498 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2499 }
2500
2501 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2502
2503 /*
2504 * tg_pt_gp_id
2505 */
2506 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2507 struct t10_alua_tg_pt_gp *tg_pt_gp,
2508 char *page)
2509 {
2510 if (!(tg_pt_gp->tg_pt_gp_valid_id))
2511 return 0;
2512
2513 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2514 }
2515
2516 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2517 struct t10_alua_tg_pt_gp *tg_pt_gp,
2518 const char *page,
2519 size_t count)
2520 {
2521 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2522 unsigned long tg_pt_gp_id;
2523 int ret;
2524
2525 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2526 if (ret < 0) {
2527 printk(KERN_ERR "strict_strtoul() returned %d for"
2528 " tg_pt_gp_id\n", ret);
2529 return -EINVAL;
2530 }
2531 if (tg_pt_gp_id > 0x0000ffff) {
2532 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2533 " 0x0000ffff\n", tg_pt_gp_id);
2534 return -EINVAL;
2535 }
2536
2537 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2538 if (ret < 0)
2539 return -EINVAL;
2540
2541 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2542 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2543 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2544 tg_pt_gp->tg_pt_gp_id);
2545
2546 return count;
2547 }
2548
2549 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2550
2551 /*
2552 * members
2553 */
2554 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2555 struct t10_alua_tg_pt_gp *tg_pt_gp,
2556 char *page)
2557 {
2558 struct se_port *port;
2559 struct se_portal_group *tpg;
2560 struct se_lun *lun;
2561 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2562 ssize_t len = 0, cur_len;
2563 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2564
2565 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2566
2567 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2568 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2569 tg_pt_gp_mem_list) {
2570 port = tg_pt_gp_mem->tg_pt;
2571 tpg = port->sep_tpg;
2572 lun = port->sep_lun;
2573
2574 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2575 "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2576 TPG_TFO(tpg)->tpg_get_wwn(tpg),
2577 TPG_TFO(tpg)->tpg_get_tag(tpg),
2578 config_item_name(&lun->lun_group.cg_item));
2579 cur_len++; /* Extra byte for NULL terminator */
2580
2581 if ((cur_len + len) > PAGE_SIZE) {
2582 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2583 "_members buffer\n");
2584 break;
2585 }
2586 memcpy(page+len, buf, cur_len);
2587 len += cur_len;
2588 }
2589 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2590
2591 return len;
2592 }
2593
2594 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2595
2596 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2597 tg_pt_gp_group);
2598
2599 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2600 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2601 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2602 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2603 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2604 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2605 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2606 &target_core_alua_tg_pt_gp_preferred.attr,
2607 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2608 &target_core_alua_tg_pt_gp_members.attr,
2609 NULL,
2610 };
2611
2612 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2613 {
2614 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2615 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2616
2617 core_alua_free_tg_pt_gp(tg_pt_gp);
2618 }
2619
2620 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2621 .release = target_core_alua_tg_pt_gp_release,
2622 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2623 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2624 };
2625
2626 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2627 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2628 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2629 .ct_owner = THIS_MODULE,
2630 };
2631
2632 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2633
2634 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2635
2636 static struct config_group *target_core_alua_create_tg_pt_gp(
2637 struct config_group *group,
2638 const char *name)
2639 {
2640 struct t10_alua *alua = container_of(group, struct t10_alua,
2641 alua_tg_pt_gps_group);
2642 struct t10_alua_tg_pt_gp *tg_pt_gp;
2643 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2644 struct config_group *alua_tg_pt_gp_cg = NULL;
2645 struct config_item *alua_tg_pt_gp_ci = NULL;
2646
2647 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2648 if (!(tg_pt_gp))
2649 return NULL;
2650
2651 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2652 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2653
2654 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2655 &target_core_alua_tg_pt_gp_cit);
2656
2657 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2658 " Group: alua/tg_pt_gps/%s\n",
2659 config_item_name(alua_tg_pt_gp_ci));
2660
2661 return alua_tg_pt_gp_cg;
2662 }
2663
2664 static void target_core_alua_drop_tg_pt_gp(
2665 struct config_group *group,
2666 struct config_item *item)
2667 {
2668 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2669 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2670
2671 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2672 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2673 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2674 /*
2675 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2676 * -> target_core_alua_tg_pt_gp_release().
2677 */
2678 config_item_put(item);
2679 }
2680
2681 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2682 .make_group = &target_core_alua_create_tg_pt_gp,
2683 .drop_item = &target_core_alua_drop_tg_pt_gp,
2684 };
2685
2686 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2687 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2688 .ct_owner = THIS_MODULE,
2689 };
2690
2691 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2692
2693 /* Start functions for struct config_item_type target_core_alua_cit */
2694
2695 /*
2696 * target_core_alua_cit is a ConfigFS group that lives under
2697 * /sys/kernel/config/target/core/alua. There are default groups
2698 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2699 * target_core_alua_cit in target_core_init_configfs() below.
2700 */
2701 static struct config_item_type target_core_alua_cit = {
2702 .ct_item_ops = NULL,
2703 .ct_attrs = NULL,
2704 .ct_owner = THIS_MODULE,
2705 };
2706
2707 /* End functions for struct config_item_type target_core_alua_cit */
2708
2709 /* Start functions for struct config_item_type target_core_stat_cit */
2710
2711 static struct config_group *target_core_stat_mkdir(
2712 struct config_group *group,
2713 const char *name)
2714 {
2715 return ERR_PTR(-ENOSYS);
2716 }
2717
2718 static void target_core_stat_rmdir(
2719 struct config_group *group,
2720 struct config_item *item)
2721 {
2722 return;
2723 }
2724
2725 static struct configfs_group_operations target_core_stat_group_ops = {
2726 .make_group = &target_core_stat_mkdir,
2727 .drop_item = &target_core_stat_rmdir,
2728 };
2729
2730 static struct config_item_type target_core_stat_cit = {
2731 .ct_group_ops = &target_core_stat_group_ops,
2732 .ct_owner = THIS_MODULE,
2733 };
2734
2735 /* End functions for struct config_item_type target_core_stat_cit */
2736
2737 /* Start functions for struct config_item_type target_core_hba_cit */
2738
2739 static struct config_group *target_core_make_subdev(
2740 struct config_group *group,
2741 const char *name)
2742 {
2743 struct t10_alua_tg_pt_gp *tg_pt_gp;
2744 struct se_subsystem_dev *se_dev;
2745 struct se_subsystem_api *t;
2746 struct config_item *hba_ci = &group->cg_item;
2747 struct se_hba *hba = item_to_hba(hba_ci);
2748 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2749 struct config_group *dev_stat_grp = NULL;
2750 int errno = -ENOMEM, ret;
2751
2752 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2753 if (ret)
2754 return ERR_PTR(ret);
2755 /*
2756 * Locate the struct se_subsystem_api from parent's struct se_hba.
2757 */
2758 t = hba->transport;
2759
2760 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2761 if (!se_dev) {
2762 printk(KERN_ERR "Unable to allocate memory for"
2763 " struct se_subsystem_dev\n");
2764 goto unlock;
2765 }
2766 INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2767 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2768 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2769 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2770 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2771 spin_lock_init(&se_dev->t10_reservation.registration_lock);
2772 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2773 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2774 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2775 spin_lock_init(&se_dev->se_dev_lock);
2776 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2777 se_dev->t10_wwn.t10_sub_dev = se_dev;
2778 se_dev->t10_alua.t10_sub_dev = se_dev;
2779 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2780
2781 se_dev->se_dev_hba = hba;
2782 dev_cg = &se_dev->se_dev_group;
2783
2784 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2785 GFP_KERNEL);
2786 if (!(dev_cg->default_groups))
2787 goto out;
2788 /*
2789 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2790 * for ->allocate_virtdevice()
2791 *
2792 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2793 * has been called successfully in the next level up in the
2794 * configfs tree for device object's struct config_group.
2795 */
2796 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2797 if (!(se_dev->se_dev_su_ptr)) {
2798 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2799 " from allocate_virtdevice()\n");
2800 goto out;
2801 }
2802 spin_lock(&se_global->g_device_lock);
2803 list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2804 spin_unlock(&se_global->g_device_lock);
2805
2806 config_group_init_type_name(&se_dev->se_dev_group, name,
2807 &target_core_dev_cit);
2808 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2809 &target_core_dev_attrib_cit);
2810 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2811 &target_core_dev_pr_cit);
2812 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2813 &target_core_dev_wwn_cit);
2814 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2815 "alua", &target_core_alua_tg_pt_gps_cit);
2816 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2817 "statistics", &target_core_stat_cit);
2818
2819 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2820 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2821 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2822 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2823 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2824 dev_cg->default_groups[5] = NULL;
2825 /*
2826 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2827 */
2828 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2829 if (!(tg_pt_gp))
2830 goto out;
2831
2832 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2833 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2834 GFP_KERNEL);
2835 if (!(tg_pt_gp_cg->default_groups)) {
2836 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2837 "default_groups\n");
2838 goto out;
2839 }
2840
2841 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2842 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2843 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2844 tg_pt_gp_cg->default_groups[1] = NULL;
2845 T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2846 /*
2847 * Add core/$HBA/$DEV/statistics/ default groups
2848 */
2849 dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2850 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2851 GFP_KERNEL);
2852 if (!dev_stat_grp->default_groups) {
2853 printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n");
2854 goto out;
2855 }
2856 target_stat_setup_dev_default_groups(se_dev);
2857
2858 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2859 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2860
2861 mutex_unlock(&hba->hba_access_mutex);
2862 return &se_dev->se_dev_group;
2863 out:
2864 if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2865 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2866 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2867 }
2868 if (dev_stat_grp)
2869 kfree(dev_stat_grp->default_groups);
2870 if (tg_pt_gp_cg)
2871 kfree(tg_pt_gp_cg->default_groups);
2872 if (dev_cg)
2873 kfree(dev_cg->default_groups);
2874 if (se_dev->se_dev_su_ptr)
2875 t->free_device(se_dev->se_dev_su_ptr);
2876 kfree(se_dev);
2877 unlock:
2878 mutex_unlock(&hba->hba_access_mutex);
2879 return ERR_PTR(errno);
2880 }
2881
2882 static void target_core_drop_subdev(
2883 struct config_group *group,
2884 struct config_item *item)
2885 {
2886 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2887 struct se_subsystem_dev, se_dev_group);
2888 struct se_hba *hba;
2889 struct se_subsystem_api *t;
2890 struct config_item *df_item;
2891 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2892 int i;
2893
2894 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2895
2896 mutex_lock(&hba->hba_access_mutex);
2897 t = hba->transport;
2898
2899 spin_lock(&se_global->g_device_lock);
2900 list_del(&se_dev->g_se_dev_list);
2901 spin_unlock(&se_global->g_device_lock);
2902
2903 dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2904 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2905 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2906 dev_stat_grp->default_groups[i] = NULL;
2907 config_item_put(df_item);
2908 }
2909 kfree(dev_stat_grp->default_groups);
2910
2911 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2912 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2913 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2914 tg_pt_gp_cg->default_groups[i] = NULL;
2915 config_item_put(df_item);
2916 }
2917 kfree(tg_pt_gp_cg->default_groups);
2918 /*
2919 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2920 * directly from target_core_alua_tg_pt_gp_release().
2921 */
2922 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2923
2924 dev_cg = &se_dev->se_dev_group;
2925 for (i = 0; dev_cg->default_groups[i]; i++) {
2926 df_item = &dev_cg->default_groups[i]->cg_item;
2927 dev_cg->default_groups[i] = NULL;
2928 config_item_put(df_item);
2929 }
2930 /*
2931 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2932 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2933 */
2934 config_item_put(item);
2935 mutex_unlock(&hba->hba_access_mutex);
2936 }
2937
2938 static struct configfs_group_operations target_core_hba_group_ops = {
2939 .make_group = target_core_make_subdev,
2940 .drop_item = target_core_drop_subdev,
2941 };
2942
2943 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2944 #define SE_HBA_ATTR(_name, _mode) \
2945 static struct target_core_hba_attribute \
2946 target_core_hba_##_name = \
2947 __CONFIGFS_EATTR(_name, _mode, \
2948 target_core_hba_show_attr_##_name, \
2949 target_core_hba_store_attr_##_name);
2950
2951 #define SE_HBA_ATTR_RO(_name) \
2952 static struct target_core_hba_attribute \
2953 target_core_hba_##_name = \
2954 __CONFIGFS_EATTR_RO(_name, \
2955 target_core_hba_show_attr_##_name);
2956
2957 static ssize_t target_core_hba_show_attr_hba_info(
2958 struct se_hba *hba,
2959 char *page)
2960 {
2961 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2962 hba->hba_id, hba->transport->name,
2963 TARGET_CORE_CONFIGFS_VERSION);
2964 }
2965
2966 SE_HBA_ATTR_RO(hba_info);
2967
2968 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2969 char *page)
2970 {
2971 int hba_mode = 0;
2972
2973 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2974 hba_mode = 1;
2975
2976 return sprintf(page, "%d\n", hba_mode);
2977 }
2978
2979 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2980 const char *page, size_t count)
2981 {
2982 struct se_subsystem_api *transport = hba->transport;
2983 unsigned long mode_flag;
2984 int ret;
2985
2986 if (transport->pmode_enable_hba == NULL)
2987 return -EINVAL;
2988
2989 ret = strict_strtoul(page, 0, &mode_flag);
2990 if (ret < 0) {
2991 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2992 return -EINVAL;
2993 }
2994
2995 spin_lock(&hba->device_lock);
2996 if (!(list_empty(&hba->hba_dev_list))) {
2997 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2998 spin_unlock(&hba->device_lock);
2999 return -EINVAL;
3000 }
3001 spin_unlock(&hba->device_lock);
3002
3003 ret = transport->pmode_enable_hba(hba, mode_flag);
3004 if (ret < 0)
3005 return -EINVAL;
3006 if (ret > 0)
3007 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3008 else if (ret == 0)
3009 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3010
3011 return count;
3012 }
3013
3014 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3015
3016 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3017
3018 static void target_core_hba_release(struct config_item *item)
3019 {
3020 struct se_hba *hba = container_of(to_config_group(item),
3021 struct se_hba, hba_group);
3022 core_delete_hba(hba);
3023 }
3024
3025 static struct configfs_attribute *target_core_hba_attrs[] = {
3026 &target_core_hba_hba_info.attr,
3027 &target_core_hba_hba_mode.attr,
3028 NULL,
3029 };
3030
3031 static struct configfs_item_operations target_core_hba_item_ops = {
3032 .release = target_core_hba_release,
3033 .show_attribute = target_core_hba_attr_show,
3034 .store_attribute = target_core_hba_attr_store,
3035 };
3036
3037 static struct config_item_type target_core_hba_cit = {
3038 .ct_item_ops = &target_core_hba_item_ops,
3039 .ct_group_ops = &target_core_hba_group_ops,
3040 .ct_attrs = target_core_hba_attrs,
3041 .ct_owner = THIS_MODULE,
3042 };
3043
3044 static struct config_group *target_core_call_addhbatotarget(
3045 struct config_group *group,
3046 const char *name)
3047 {
3048 char *se_plugin_str, *str, *str2;
3049 struct se_hba *hba;
3050 char buf[TARGET_CORE_NAME_MAX_LEN];
3051 unsigned long plugin_dep_id = 0;
3052 int ret;
3053
3054 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3055 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3056 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
3057 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3058 TARGET_CORE_NAME_MAX_LEN);
3059 return ERR_PTR(-ENAMETOOLONG);
3060 }
3061 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3062
3063 str = strstr(buf, "_");
3064 if (!(str)) {
3065 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3066 return ERR_PTR(-EINVAL);
3067 }
3068 se_plugin_str = buf;
3069 /*
3070 * Special case for subsystem plugins that have "_" in their names.
3071 * Namely rd_direct and rd_mcp..
3072 */
3073 str2 = strstr(str+1, "_");
3074 if ((str2)) {
3075 *str2 = '\0'; /* Terminate for *se_plugin_str */
3076 str2++; /* Skip to start of plugin dependent ID */
3077 str = str2;
3078 } else {
3079 *str = '\0'; /* Terminate for *se_plugin_str */
3080 str++; /* Skip to start of plugin dependent ID */
3081 }
3082
3083 ret = strict_strtoul(str, 0, &plugin_dep_id);
3084 if (ret < 0) {
3085 printk(KERN_ERR "strict_strtoul() returned %d for"
3086 " plugin_dep_id\n", ret);
3087 return ERR_PTR(-EINVAL);
3088 }
3089 /*
3090 * Load up TCM subsystem plugins if they have not already been loaded.
3091 */
3092 if (transport_subsystem_check_init() < 0)
3093 return ERR_PTR(-EINVAL);
3094
3095 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3096 if (IS_ERR(hba))
3097 return ERR_CAST(hba);
3098
3099 config_group_init_type_name(&hba->hba_group, name,
3100 &target_core_hba_cit);
3101
3102 return &hba->hba_group;
3103 }
3104
3105 static void target_core_call_delhbafromtarget(
3106 struct config_group *group,
3107 struct config_item *item)
3108 {
3109 /*
3110 * core_delete_hba() is called from target_core_hba_item_ops->release()
3111 * -> target_core_hba_release()
3112 */
3113 config_item_put(item);
3114 }
3115
3116 static struct configfs_group_operations target_core_group_ops = {
3117 .make_group = target_core_call_addhbatotarget,
3118 .drop_item = target_core_call_delhbafromtarget,
3119 };
3120
3121 static struct config_item_type target_core_cit = {
3122 .ct_item_ops = NULL,
3123 .ct_group_ops = &target_core_group_ops,
3124 .ct_attrs = NULL,
3125 .ct_owner = THIS_MODULE,
3126 };
3127
3128 /* Stop functions for struct config_item_type target_core_hba_cit */
3129
3130 static int __init target_core_init_configfs(void)
3131 {
3132 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3133 struct config_group *lu_gp_cg = NULL;
3134 struct configfs_subsystem *subsys;
3135 struct t10_alua_lu_gp *lu_gp;
3136 int ret;
3137
3138 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3139 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3140 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3141
3142 subsys = target_core_subsystem[0];
3143 config_group_init(&subsys->su_group);
3144 mutex_init(&subsys->su_mutex);
3145
3146 INIT_LIST_HEAD(&g_tf_list);
3147 mutex_init(&g_tf_lock);
3148 init_scsi_index_table();
3149 ret = init_se_global();
3150 if (ret < 0)
3151 return -1;
3152 /*
3153 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3154 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3155 */
3156 target_cg = &subsys->su_group;
3157 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3158 GFP_KERNEL);
3159 if (!(target_cg->default_groups)) {
3160 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3161 goto out_global;
3162 }
3163
3164 config_group_init_type_name(&se_global->target_core_hbagroup,
3165 "core", &target_core_cit);
3166 target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3167 target_cg->default_groups[1] = NULL;
3168 /*
3169 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3170 */
3171 hba_cg = &se_global->target_core_hbagroup;
3172 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3173 GFP_KERNEL);
3174 if (!(hba_cg->default_groups)) {
3175 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3176 goto out_global;
3177 }
3178 config_group_init_type_name(&se_global->alua_group,
3179 "alua", &target_core_alua_cit);
3180 hba_cg->default_groups[0] = &se_global->alua_group;
3181 hba_cg->default_groups[1] = NULL;
3182 /*
3183 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3184 * groups under /sys/kernel/config/target/core/alua/
3185 */
3186 alua_cg = &se_global->alua_group;
3187 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3188 GFP_KERNEL);
3189 if (!(alua_cg->default_groups)) {
3190 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3191 goto out_global;
3192 }
3193
3194 config_group_init_type_name(&se_global->alua_lu_gps_group,
3195 "lu_gps", &target_core_alua_lu_gps_cit);
3196 alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3197 alua_cg->default_groups[1] = NULL;
3198 /*
3199 * Add core/alua/lu_gps/default_lu_gp
3200 */
3201 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3202 if (IS_ERR(lu_gp))
3203 goto out_global;
3204
3205 lu_gp_cg = &se_global->alua_lu_gps_group;
3206 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3207 GFP_KERNEL);
3208 if (!(lu_gp_cg->default_groups)) {
3209 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3210 goto out_global;
3211 }
3212
3213 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3214 &target_core_alua_lu_gp_cit);
3215 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3216 lu_gp_cg->default_groups[1] = NULL;
3217 se_global->default_lu_gp = lu_gp;
3218 /*
3219 * Register the target_core_mod subsystem with configfs.
3220 */
3221 ret = configfs_register_subsystem(subsys);
3222 if (ret < 0) {
3223 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3224 ret, subsys->su_group.cg_item.ci_namebuf);
3225 goto out_global;
3226 }
3227 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3228 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3229 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3230 /*
3231 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3232 */
3233 ret = rd_module_init();
3234 if (ret < 0)
3235 goto out;
3236
3237 if (core_dev_setup_virtual_lun0() < 0)
3238 goto out;
3239
3240 return 0;
3241
3242 out:
3243 configfs_unregister_subsystem(subsys);
3244 core_dev_release_virtual_lun0();
3245 rd_module_exit();
3246 out_global:
3247 if (se_global->default_lu_gp) {
3248 core_alua_free_lu_gp(se_global->default_lu_gp);
3249 se_global->default_lu_gp = NULL;
3250 }
3251 if (lu_gp_cg)
3252 kfree(lu_gp_cg->default_groups);
3253 if (alua_cg)
3254 kfree(alua_cg->default_groups);
3255 if (hba_cg)
3256 kfree(hba_cg->default_groups);
3257 kfree(target_cg->default_groups);
3258 release_se_global();
3259 return -1;
3260 }
3261
3262 static void __exit target_core_exit_configfs(void)
3263 {
3264 struct configfs_subsystem *subsys;
3265 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3266 struct config_item *item;
3267 int i;
3268
3269 se_global->in_shutdown = 1;
3270 subsys = target_core_subsystem[0];
3271
3272 lu_gp_cg = &se_global->alua_lu_gps_group;
3273 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3274 item = &lu_gp_cg->default_groups[i]->cg_item;
3275 lu_gp_cg->default_groups[i] = NULL;
3276 config_item_put(item);
3277 }
3278 kfree(lu_gp_cg->default_groups);
3279 lu_gp_cg->default_groups = NULL;
3280
3281 alua_cg = &se_global->alua_group;
3282 for (i = 0; alua_cg->default_groups[i]; i++) {
3283 item = &alua_cg->default_groups[i]->cg_item;
3284 alua_cg->default_groups[i] = NULL;
3285 config_item_put(item);
3286 }
3287 kfree(alua_cg->default_groups);
3288 alua_cg->default_groups = NULL;
3289
3290 hba_cg = &se_global->target_core_hbagroup;
3291 for (i = 0; hba_cg->default_groups[i]; i++) {
3292 item = &hba_cg->default_groups[i]->cg_item;
3293 hba_cg->default_groups[i] = NULL;
3294 config_item_put(item);
3295 }
3296 kfree(hba_cg->default_groups);
3297 hba_cg->default_groups = NULL;
3298 /*
3299 * We expect subsys->su_group.default_groups to be released
3300 * by configfs subsystem provider logic..
3301 */
3302 configfs_unregister_subsystem(subsys);
3303 kfree(subsys->su_group.default_groups);
3304
3305 core_alua_free_lu_gp(se_global->default_lu_gp);
3306 se_global->default_lu_gp = NULL;
3307
3308 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3309 " Infrastructure\n");
3310
3311 core_dev_release_virtual_lun0();
3312 rd_module_exit();
3313 release_se_global();
3314
3315 return;
3316 }
3317
3318 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3319 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3320 MODULE_LICENSE("GPL");
3321
3322 module_init(target_core_init_configfs);
3323 module_exit(target_core_exit_configfs);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree