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target: Allow for built-in target modules
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / target / target_core_configfs.c
blob8d2aba51fc8b802c1f9bd0553c031e27c17e4158
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 #include <linux/spinlock.h>
41
42 #include <target/target_core_base.h>
43 #include <target/target_core_device.h>
44 #include <target/target_core_transport.h>
45 #include <target/target_core_fabric_ops.h>
46 #include <target/target_core_fabric_configfs.h>
47 #include <target/target_core_configfs.h>
48 #include <target/configfs_macros.h>
49
50 #include "target_core_alua.h"
51 #include "target_core_hba.h"
52 #include "target_core_pr.h"
53 #include "target_core_rd.h"
54 #include "target_core_stat.h"
55
56 extern struct t10_alua_lu_gp *default_lu_gp;
57
58 static struct list_head g_tf_list;
59 static struct mutex g_tf_lock;
60
61 struct target_core_configfs_attribute {
62 struct configfs_attribute attr;
63 ssize_t (*show)(void *, char *);
64 ssize_t (*store)(void *, const char *, size_t);
65 };
66
67 static struct config_group target_core_hbagroup;
68 static struct config_group alua_group;
69 static struct config_group alua_lu_gps_group;
70
71 static DEFINE_SPINLOCK(se_device_lock);
72 static LIST_HEAD(se_dev_list);
73
74 static inline struct se_hba *
75 item_to_hba(struct config_item *item)
76 {
77 return container_of(to_config_group(item), struct se_hba, hba_group);
78 }
79
80 /*
81 * Attributes for /sys/kernel/config/target/
82 */
83 static ssize_t target_core_attr_show(struct config_item *item,
84 struct configfs_attribute *attr,
85 char *page)
86 {
87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
89 utsname()->sysname, utsname()->machine);
90 }
91
92 static struct configfs_item_operations target_core_fabric_item_ops = {
93 .show_attribute = target_core_attr_show,
94 };
95
96 static struct configfs_attribute target_core_item_attr_version = {
97 .ca_owner = THIS_MODULE,
98 .ca_name = "version",
99 .ca_mode = S_IRUGO,
100 };
101
102 static struct target_fabric_configfs *target_core_get_fabric(
103 const char *name)
104 {
105 struct target_fabric_configfs *tf;
106
107 if (!(name))
108 return NULL;
109
110 mutex_lock(&g_tf_lock);
111 list_for_each_entry(tf, &g_tf_list, tf_list) {
112 if (!(strcmp(tf->tf_name, name))) {
113 atomic_inc(&tf->tf_access_cnt);
114 mutex_unlock(&g_tf_lock);
115 return tf;
116 }
117 }
118 mutex_unlock(&g_tf_lock);
119
120 return NULL;
121 }
122
123 /*
124 * Called from struct target_core_group_ops->make_group()
125 */
126 static struct config_group *target_core_register_fabric(
127 struct config_group *group,
128 const char *name)
129 {
130 struct target_fabric_configfs *tf;
131 int ret;
132
133 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
134 " %s\n", group, name);
135 /*
136 * Ensure that TCM subsystem plugins are loaded at this point for
137 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
138 * LUN symlinks.
139 */
140 if (transport_subsystem_check_init() < 0)
141 return ERR_PTR(-EINVAL);
142
143 /*
144 * Below are some hardcoded request_module() calls to automatically
145 * local fabric modules when the following is called:
146 *
147 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
148 *
149 * Note that this does not limit which TCM fabric module can be
150 * registered, but simply provids auto loading logic for modules with
151 * mkdir(2) system calls with known TCM fabric modules.
152 */
153 if (!(strncmp(name, "iscsi", 5))) {
154 /*
155 * Automatically load the LIO Target fabric module when the
156 * following is called:
157 *
158 * mkdir -p $CONFIGFS/target/iscsi
159 */
160 ret = request_module("iscsi_target_mod");
161 if (ret < 0) {
162 printk(KERN_ERR "request_module() failed for"
163 " iscsi_target_mod.ko: %d\n", ret);
164 return ERR_PTR(-EINVAL);
165 }
166 } else if (!(strncmp(name, "loopback", 8))) {
167 /*
168 * Automatically load the tcm_loop fabric module when the
169 * following is called:
170 *
171 * mkdir -p $CONFIGFS/target/loopback
172 */
173 ret = request_module("tcm_loop");
174 if (ret < 0) {
175 printk(KERN_ERR "request_module() failed for"
176 " tcm_loop.ko: %d\n", ret);
177 return ERR_PTR(-EINVAL);
178 }
179 }
180
181 tf = target_core_get_fabric(name);
182 if (!(tf)) {
183 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
184 name);
185 return ERR_PTR(-EINVAL);
186 }
187 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
188 " %s\n", tf->tf_name);
189 /*
190 * On a successful target_core_get_fabric() look, the returned
191 * struct target_fabric_configfs *tf will contain a usage reference.
192 */
193 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
194 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
195
196 tf->tf_group.default_groups = tf->tf_default_groups;
197 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
198 tf->tf_group.default_groups[1] = NULL;
199
200 config_group_init_type_name(&tf->tf_group, name,
201 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
202 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
203 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
204
205 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
206 " %s\n", tf->tf_group.cg_item.ci_name);
207 /*
208 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
209 */
210 tf->tf_ops.tf_subsys = tf->tf_subsys;
211 tf->tf_fabric = &tf->tf_group.cg_item;
212 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
213 " for %s\n", name);
214
215 return &tf->tf_group;
216 }
217
218 /*
219 * Called from struct target_core_group_ops->drop_item()
220 */
221 static void target_core_deregister_fabric(
222 struct config_group *group,
223 struct config_item *item)
224 {
225 struct target_fabric_configfs *tf = container_of(
226 to_config_group(item), struct target_fabric_configfs, tf_group);
227 struct config_group *tf_group;
228 struct config_item *df_item;
229 int i;
230
231 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
232 " tf list\n", config_item_name(item));
233
234 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
235 " %s\n", tf->tf_name);
236 atomic_dec(&tf->tf_access_cnt);
237
238 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
239 " tf->tf_fabric for %s\n", tf->tf_name);
240 tf->tf_fabric = NULL;
241
242 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
243 " %s\n", config_item_name(item));
244
245 tf_group = &tf->tf_group;
246 for (i = 0; tf_group->default_groups[i]; i++) {
247 df_item = &tf_group->default_groups[i]->cg_item;
248 tf_group->default_groups[i] = NULL;
249 config_item_put(df_item);
250 }
251 config_item_put(item);
252 }
253
254 static struct configfs_group_operations target_core_fabric_group_ops = {
255 .make_group = &target_core_register_fabric,
256 .drop_item = &target_core_deregister_fabric,
257 };
258
259 /*
260 * All item attributes appearing in /sys/kernel/target/ appear here.
261 */
262 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
263 &target_core_item_attr_version,
264 NULL,
265 };
266
267 /*
268 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
269 */
270 static struct config_item_type target_core_fabrics_item = {
271 .ct_item_ops = &target_core_fabric_item_ops,
272 .ct_group_ops = &target_core_fabric_group_ops,
273 .ct_attrs = target_core_fabric_item_attrs,
274 .ct_owner = THIS_MODULE,
275 };
276
277 static struct configfs_subsystem target_core_fabrics = {
278 .su_group = {
279 .cg_item = {
280 .ci_namebuf = "target",
281 .ci_type = &target_core_fabrics_item,
282 },
283 },
284 };
285
286 static struct configfs_subsystem *target_core_subsystem[] = {
287 &target_core_fabrics,
288 NULL,
289 };
290
291 /*##############################################################################
292 // Start functions called by external Target Fabrics Modules
293 //############################################################################*/
294
295 /*
296 * First function called by fabric modules to:
297 *
298 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
299 * 2) Add struct target_fabric_configfs to g_tf_list
300 * 3) Return struct target_fabric_configfs to fabric module to be passed
301 * into target_fabric_configfs_register().
302 */
303 struct target_fabric_configfs *target_fabric_configfs_init(
304 struct module *fabric_mod,
305 const char *name)
306 {
307 struct target_fabric_configfs *tf;
308
309 if (!(name)) {
310 printk(KERN_ERR "Unable to locate passed fabric name\n");
311 return ERR_PTR(-EINVAL);
312 }
313 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
314 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
315 "_NAME_SIZE\n", name);
316 return ERR_PTR(-EINVAL);
317 }
318
319 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
320 if (!(tf))
321 return ERR_PTR(-ENOMEM);
322
323 INIT_LIST_HEAD(&tf->tf_list);
324 atomic_set(&tf->tf_access_cnt, 0);
325 /*
326 * Setup the default generic struct config_item_type's (cits) in
327 * struct target_fabric_configfs->tf_cit_tmpl
328 */
329 tf->tf_module = fabric_mod;
330 target_fabric_setup_cits(tf);
331
332 tf->tf_subsys = target_core_subsystem[0];
333 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
334
335 mutex_lock(&g_tf_lock);
336 list_add_tail(&tf->tf_list, &g_tf_list);
337 mutex_unlock(&g_tf_lock);
338
339 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
340 ">>>>>>>>>>>>>>\n");
341 printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
342 " %s\n", tf, tf->tf_name);
343 return tf;
344 }
345 EXPORT_SYMBOL(target_fabric_configfs_init);
346
347 /*
348 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
349 */
350 void target_fabric_configfs_free(
351 struct target_fabric_configfs *tf)
352 {
353 mutex_lock(&g_tf_lock);
354 list_del(&tf->tf_list);
355 mutex_unlock(&g_tf_lock);
356
357 kfree(tf);
358 }
359 EXPORT_SYMBOL(target_fabric_configfs_free);
360
361 /*
362 * Perform a sanity check of the passed tf->tf_ops before completing
363 * TCM fabric module registration.
364 */
365 static int target_fabric_tf_ops_check(
366 struct target_fabric_configfs *tf)
367 {
368 struct target_core_fabric_ops *tfo = &tf->tf_ops;
369
370 if (!(tfo->get_fabric_name)) {
371 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
372 return -EINVAL;
373 }
374 if (!(tfo->get_fabric_proto_ident)) {
375 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
376 return -EINVAL;
377 }
378 if (!(tfo->tpg_get_wwn)) {
379 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
380 return -EINVAL;
381 }
382 if (!(tfo->tpg_get_tag)) {
383 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
384 return -EINVAL;
385 }
386 if (!(tfo->tpg_get_default_depth)) {
387 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
388 return -EINVAL;
389 }
390 if (!(tfo->tpg_get_pr_transport_id)) {
391 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
392 return -EINVAL;
393 }
394 if (!(tfo->tpg_get_pr_transport_id_len)) {
395 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
396 return -EINVAL;
397 }
398 if (!(tfo->tpg_check_demo_mode)) {
399 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
400 return -EINVAL;
401 }
402 if (!(tfo->tpg_check_demo_mode_cache)) {
403 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
404 return -EINVAL;
405 }
406 if (!(tfo->tpg_check_demo_mode_write_protect)) {
407 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
408 return -EINVAL;
409 }
410 if (!(tfo->tpg_check_prod_mode_write_protect)) {
411 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
412 return -EINVAL;
413 }
414 if (!(tfo->tpg_alloc_fabric_acl)) {
415 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
416 return -EINVAL;
417 }
418 if (!(tfo->tpg_release_fabric_acl)) {
419 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
420 return -EINVAL;
421 }
422 if (!(tfo->tpg_get_inst_index)) {
423 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
424 return -EINVAL;
425 }
426 if (!tfo->release_cmd) {
427 printk(KERN_ERR "Missing tfo->release_cmd()\n");
428 return -EINVAL;
429 }
430 if (!(tfo->shutdown_session)) {
431 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
432 return -EINVAL;
433 }
434 if (!(tfo->close_session)) {
435 printk(KERN_ERR "Missing tfo->close_session()\n");
436 return -EINVAL;
437 }
438 if (!(tfo->stop_session)) {
439 printk(KERN_ERR "Missing tfo->stop_session()\n");
440 return -EINVAL;
441 }
442 if (!(tfo->fall_back_to_erl0)) {
443 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
444 return -EINVAL;
445 }
446 if (!(tfo->sess_logged_in)) {
447 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
448 return -EINVAL;
449 }
450 if (!(tfo->sess_get_index)) {
451 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
452 return -EINVAL;
453 }
454 if (!(tfo->write_pending)) {
455 printk(KERN_ERR "Missing tfo->write_pending()\n");
456 return -EINVAL;
457 }
458 if (!(tfo->write_pending_status)) {
459 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
460 return -EINVAL;
461 }
462 if (!(tfo->set_default_node_attributes)) {
463 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
464 return -EINVAL;
465 }
466 if (!(tfo->get_task_tag)) {
467 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
468 return -EINVAL;
469 }
470 if (!(tfo->get_cmd_state)) {
471 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
472 return -EINVAL;
473 }
474 if (!(tfo->queue_data_in)) {
475 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
476 return -EINVAL;
477 }
478 if (!(tfo->queue_status)) {
479 printk(KERN_ERR "Missing tfo->queue_status()\n");
480 return -EINVAL;
481 }
482 if (!(tfo->queue_tm_rsp)) {
483 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
484 return -EINVAL;
485 }
486 if (!(tfo->set_fabric_sense_len)) {
487 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
488 return -EINVAL;
489 }
490 if (!(tfo->get_fabric_sense_len)) {
491 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
492 return -EINVAL;
493 }
494 if (!(tfo->is_state_remove)) {
495 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
496 return -EINVAL;
497 }
498 /*
499 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
500 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
501 * target_core_fabric_configfs.c WWN+TPG group context code.
502 */
503 if (!(tfo->fabric_make_wwn)) {
504 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
505 return -EINVAL;
506 }
507 if (!(tfo->fabric_drop_wwn)) {
508 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
509 return -EINVAL;
510 }
511 if (!(tfo->fabric_make_tpg)) {
512 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
513 return -EINVAL;
514 }
515 if (!(tfo->fabric_drop_tpg)) {
516 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
517 return -EINVAL;
518 }
519
520 return 0;
521 }
522
523 /*
524 * Called 2nd from fabric module with returned parameter of
525 * struct target_fabric_configfs * from target_fabric_configfs_init().
526 *
527 * Upon a successful registration, the new fabric's struct config_item is
528 * return. Also, a pointer to this struct is set in the passed
529 * struct target_fabric_configfs.
530 */
531 int target_fabric_configfs_register(
532 struct target_fabric_configfs *tf)
533 {
534 int ret;
535
536 if (!(tf)) {
537 printk(KERN_ERR "Unable to locate target_fabric_configfs"
538 " pointer\n");
539 return -EINVAL;
540 }
541 if (!(tf->tf_subsys)) {
542 printk(KERN_ERR "Unable to target struct config_subsystem"
543 " pointer\n");
544 return -EINVAL;
545 }
546 ret = target_fabric_tf_ops_check(tf);
547 if (ret < 0)
548 return ret;
549
550 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
551 ">>>>>>>>>>\n");
552 return 0;
553 }
554 EXPORT_SYMBOL(target_fabric_configfs_register);
555
556 void target_fabric_configfs_deregister(
557 struct target_fabric_configfs *tf)
558 {
559 struct configfs_subsystem *su;
560
561 if (!(tf)) {
562 printk(KERN_ERR "Unable to locate passed target_fabric_"
563 "configfs\n");
564 return;
565 }
566 su = tf->tf_subsys;
567 if (!(su)) {
568 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
569 " pointer\n");
570 return;
571 }
572 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
573 ">>>>>>>>>>>>\n");
574 mutex_lock(&g_tf_lock);
575 if (atomic_read(&tf->tf_access_cnt)) {
576 mutex_unlock(&g_tf_lock);
577 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
578 tf->tf_name);
579 BUG();
580 }
581 list_del(&tf->tf_list);
582 mutex_unlock(&g_tf_lock);
583
584 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
585 " %s\n", tf->tf_name);
586 tf->tf_module = NULL;
587 tf->tf_subsys = NULL;
588 kfree(tf);
589
590 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
591 ">>>>>\n");
592 }
593 EXPORT_SYMBOL(target_fabric_configfs_deregister);
594
595 /*##############################################################################
596 // Stop functions called by external Target Fabrics Modules
597 //############################################################################*/
598
599 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
600
601 #define DEF_DEV_ATTRIB_SHOW(_name) \
602 static ssize_t target_core_dev_show_attr_##_name( \
603 struct se_dev_attrib *da, \
604 char *page) \
605 { \
606 struct se_device *dev; \
607 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
608 ssize_t rb; \
609 \
610 spin_lock(&se_dev->se_dev_lock); \
611 dev = se_dev->se_dev_ptr; \
612 if (!(dev)) { \
613 spin_unlock(&se_dev->se_dev_lock); \
614 return -ENODEV; \
615 } \
616 rb = snprintf(page, PAGE_SIZE, "%u\n", \
617 (u32)dev->se_sub_dev->se_dev_attrib._name); \
618 spin_unlock(&se_dev->se_dev_lock); \
619 \
620 return rb; \
621 }
622
623 #define DEF_DEV_ATTRIB_STORE(_name) \
624 static ssize_t target_core_dev_store_attr_##_name( \
625 struct se_dev_attrib *da, \
626 const char *page, \
627 size_t count) \
628 { \
629 struct se_device *dev; \
630 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
631 unsigned long val; \
632 int ret; \
633 \
634 spin_lock(&se_dev->se_dev_lock); \
635 dev = se_dev->se_dev_ptr; \
636 if (!(dev)) { \
637 spin_unlock(&se_dev->se_dev_lock); \
638 return -ENODEV; \
639 } \
640 ret = strict_strtoul(page, 0, &val); \
641 if (ret < 0) { \
642 spin_unlock(&se_dev->se_dev_lock); \
643 printk(KERN_ERR "strict_strtoul() failed with" \
644 " ret: %d\n", ret); \
645 return -EINVAL; \
646 } \
647 ret = se_dev_set_##_name(dev, (u32)val); \
648 spin_unlock(&se_dev->se_dev_lock); \
649 \
650 return (!ret) ? count : -EINVAL; \
651 }
652
653 #define DEF_DEV_ATTRIB(_name) \
654 DEF_DEV_ATTRIB_SHOW(_name); \
655 DEF_DEV_ATTRIB_STORE(_name);
656
657 #define DEF_DEV_ATTRIB_RO(_name) \
658 DEF_DEV_ATTRIB_SHOW(_name);
659
660 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
661 #define SE_DEV_ATTR(_name, _mode) \
662 static struct target_core_dev_attrib_attribute \
663 target_core_dev_attrib_##_name = \
664 __CONFIGFS_EATTR(_name, _mode, \
665 target_core_dev_show_attr_##_name, \
666 target_core_dev_store_attr_##_name);
667
668 #define SE_DEV_ATTR_RO(_name); \
669 static struct target_core_dev_attrib_attribute \
670 target_core_dev_attrib_##_name = \
671 __CONFIGFS_EATTR_RO(_name, \
672 target_core_dev_show_attr_##_name);
673
674 DEF_DEV_ATTRIB(emulate_dpo);
675 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
676
677 DEF_DEV_ATTRIB(emulate_fua_write);
678 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
679
680 DEF_DEV_ATTRIB(emulate_fua_read);
681 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
682
683 DEF_DEV_ATTRIB(emulate_write_cache);
684 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
685
686 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
687 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
688
689 DEF_DEV_ATTRIB(emulate_tas);
690 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
691
692 DEF_DEV_ATTRIB(emulate_tpu);
693 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
694
695 DEF_DEV_ATTRIB(emulate_tpws);
696 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
697
698 DEF_DEV_ATTRIB(enforce_pr_isids);
699 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
700
701 DEF_DEV_ATTRIB_RO(hw_block_size);
702 SE_DEV_ATTR_RO(hw_block_size);
703
704 DEF_DEV_ATTRIB(block_size);
705 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
706
707 DEF_DEV_ATTRIB_RO(hw_max_sectors);
708 SE_DEV_ATTR_RO(hw_max_sectors);
709
710 DEF_DEV_ATTRIB(max_sectors);
711 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
712
713 DEF_DEV_ATTRIB(optimal_sectors);
714 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
715
716 DEF_DEV_ATTRIB_RO(hw_queue_depth);
717 SE_DEV_ATTR_RO(hw_queue_depth);
718
719 DEF_DEV_ATTRIB(queue_depth);
720 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
721
722 DEF_DEV_ATTRIB(task_timeout);
723 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
724
725 DEF_DEV_ATTRIB(max_unmap_lba_count);
726 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
727
728 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
729 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
730
731 DEF_DEV_ATTRIB(unmap_granularity);
732 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
733
734 DEF_DEV_ATTRIB(unmap_granularity_alignment);
735 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
736
737 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
738
739 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
740 &target_core_dev_attrib_emulate_dpo.attr,
741 &target_core_dev_attrib_emulate_fua_write.attr,
742 &target_core_dev_attrib_emulate_fua_read.attr,
743 &target_core_dev_attrib_emulate_write_cache.attr,
744 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
745 &target_core_dev_attrib_emulate_tas.attr,
746 &target_core_dev_attrib_emulate_tpu.attr,
747 &target_core_dev_attrib_emulate_tpws.attr,
748 &target_core_dev_attrib_enforce_pr_isids.attr,
749 &target_core_dev_attrib_hw_block_size.attr,
750 &target_core_dev_attrib_block_size.attr,
751 &target_core_dev_attrib_hw_max_sectors.attr,
752 &target_core_dev_attrib_max_sectors.attr,
753 &target_core_dev_attrib_optimal_sectors.attr,
754 &target_core_dev_attrib_hw_queue_depth.attr,
755 &target_core_dev_attrib_queue_depth.attr,
756 &target_core_dev_attrib_task_timeout.attr,
757 &target_core_dev_attrib_max_unmap_lba_count.attr,
758 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
759 &target_core_dev_attrib_unmap_granularity.attr,
760 &target_core_dev_attrib_unmap_granularity_alignment.attr,
761 NULL,
762 };
763
764 static struct configfs_item_operations target_core_dev_attrib_ops = {
765 .show_attribute = target_core_dev_attrib_attr_show,
766 .store_attribute = target_core_dev_attrib_attr_store,
767 };
768
769 static struct config_item_type target_core_dev_attrib_cit = {
770 .ct_item_ops = &target_core_dev_attrib_ops,
771 .ct_attrs = target_core_dev_attrib_attrs,
772 .ct_owner = THIS_MODULE,
773 };
774
775 /* End functions for struct config_item_type target_core_dev_attrib_cit */
776
777 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
778
779 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
780 #define SE_DEV_WWN_ATTR(_name, _mode) \
781 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
782 __CONFIGFS_EATTR(_name, _mode, \
783 target_core_dev_wwn_show_attr_##_name, \
784 target_core_dev_wwn_store_attr_##_name);
785
786 #define SE_DEV_WWN_ATTR_RO(_name); \
787 do { \
788 static struct target_core_dev_wwn_attribute \
789 target_core_dev_wwn_##_name = \
790 __CONFIGFS_EATTR_RO(_name, \
791 target_core_dev_wwn_show_attr_##_name); \
792 } while (0);
793
794 /*
795 * VPD page 0x80 Unit serial
796 */
797 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
798 struct t10_wwn *t10_wwn,
799 char *page)
800 {
801 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
802 struct se_device *dev;
803
804 dev = se_dev->se_dev_ptr;
805 if (!(dev))
806 return -ENODEV;
807
808 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
809 &t10_wwn->unit_serial[0]);
810 }
811
812 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
813 struct t10_wwn *t10_wwn,
814 const char *page,
815 size_t count)
816 {
817 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
818 struct se_device *dev;
819 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
820
821 /*
822 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
823 * from the struct scsi_device level firmware, do not allow
824 * VPD Unit Serial to be emulated.
825 *
826 * Note this struct scsi_device could also be emulating VPD
827 * information from its drivers/scsi LLD. But for now we assume
828 * it is doing 'the right thing' wrt a world wide unique
829 * VPD Unit Serial Number that OS dependent multipath can depend on.
830 */
831 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
832 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
833 " Unit Serial, ignoring request\n");
834 return -EOPNOTSUPP;
835 }
836
837 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
838 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
839 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
840 return -EOVERFLOW;
841 }
842 /*
843 * Check to see if any active $FABRIC_MOD exports exist. If they
844 * do exist, fail here as changing this information on the fly
845 * (underneath the initiator side OS dependent multipath code)
846 * could cause negative effects.
847 */
848 dev = su_dev->se_dev_ptr;
849 if ((dev)) {
850 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
851 printk(KERN_ERR "Unable to set VPD Unit Serial while"
852 " active %d $FABRIC_MOD exports exist\n",
853 atomic_read(&dev->dev_export_obj.obj_access_count));
854 return -EINVAL;
855 }
856 }
857 /*
858 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
859 *
860 * Also, strip any newline added from the userspace
861 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
862 */
863 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
864 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
865 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
866 "%s", strstrip(buf));
867 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
868
869 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
870 " %s\n", su_dev->t10_wwn.unit_serial);
871
872 return count;
873 }
874
875 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
876
877 /*
878 * VPD page 0x83 Protocol Identifier
879 */
880 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
881 struct t10_wwn *t10_wwn,
882 char *page)
883 {
884 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
885 struct se_device *dev;
886 struct t10_vpd *vpd;
887 unsigned char buf[VPD_TMP_BUF_SIZE];
888 ssize_t len = 0;
889
890 dev = se_dev->se_dev_ptr;
891 if (!(dev))
892 return -ENODEV;
893
894 memset(buf, 0, VPD_TMP_BUF_SIZE);
895
896 spin_lock(&t10_wwn->t10_vpd_lock);
897 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
898 if (!(vpd->protocol_identifier_set))
899 continue;
900
901 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
902
903 if ((len + strlen(buf) >= PAGE_SIZE))
904 break;
905
906 len += sprintf(page+len, "%s", buf);
907 }
908 spin_unlock(&t10_wwn->t10_vpd_lock);
909
910 return len;
911 }
912
913 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
914 struct t10_wwn *t10_wwn,
915 const char *page,
916 size_t count)
917 {
918 return -ENOSYS;
919 }
920
921 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
922
923 /*
924 * Generic wrapper for dumping VPD identifiers by association.
925 */
926 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
927 static ssize_t target_core_dev_wwn_show_attr_##_name( \
928 struct t10_wwn *t10_wwn, \
929 char *page) \
930 { \
931 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
932 struct se_device *dev; \
933 struct t10_vpd *vpd; \
934 unsigned char buf[VPD_TMP_BUF_SIZE]; \
935 ssize_t len = 0; \
936 \
937 dev = se_dev->se_dev_ptr; \
938 if (!(dev)) \
939 return -ENODEV; \
940 \
941 spin_lock(&t10_wwn->t10_vpd_lock); \
942 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
943 if (vpd->association != _assoc) \
944 continue; \
945 \
946 memset(buf, 0, VPD_TMP_BUF_SIZE); \
947 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
948 if ((len + strlen(buf) >= PAGE_SIZE)) \
949 break; \
950 len += sprintf(page+len, "%s", buf); \
951 \
952 memset(buf, 0, VPD_TMP_BUF_SIZE); \
953 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
954 if ((len + strlen(buf) >= PAGE_SIZE)) \
955 break; \
956 len += sprintf(page+len, "%s", buf); \
957 \
958 memset(buf, 0, VPD_TMP_BUF_SIZE); \
959 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
960 if ((len + strlen(buf) >= PAGE_SIZE)) \
961 break; \
962 len += sprintf(page+len, "%s", buf); \
963 } \
964 spin_unlock(&t10_wwn->t10_vpd_lock); \
965 \
966 return len; \
967 }
968
969 /*
970 * VPD page 0x83 Assoication: Logical Unit
971 */
972 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
973
974 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
975 struct t10_wwn *t10_wwn,
976 const char *page,
977 size_t count)
978 {
979 return -ENOSYS;
980 }
981
982 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
983
984 /*
985 * VPD page 0x83 Association: Target Port
986 */
987 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
988
989 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
990 struct t10_wwn *t10_wwn,
991 const char *page,
992 size_t count)
993 {
994 return -ENOSYS;
995 }
996
997 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
998
999 /*
1000 * VPD page 0x83 Association: SCSI Target Device
1001 */
1002 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1003
1004 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1005 struct t10_wwn *t10_wwn,
1006 const char *page,
1007 size_t count)
1008 {
1009 return -ENOSYS;
1010 }
1011
1012 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1013
1014 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1015
1016 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1017 &target_core_dev_wwn_vpd_unit_serial.attr,
1018 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1019 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1020 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1021 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1022 NULL,
1023 };
1024
1025 static struct configfs_item_operations target_core_dev_wwn_ops = {
1026 .show_attribute = target_core_dev_wwn_attr_show,
1027 .store_attribute = target_core_dev_wwn_attr_store,
1028 };
1029
1030 static struct config_item_type target_core_dev_wwn_cit = {
1031 .ct_item_ops = &target_core_dev_wwn_ops,
1032 .ct_attrs = target_core_dev_wwn_attrs,
1033 .ct_owner = THIS_MODULE,
1034 };
1035
1036 /* End functions for struct config_item_type target_core_dev_wwn_cit */
1037
1038 /* Start functions for struct config_item_type target_core_dev_pr_cit */
1039
1040 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1041 #define SE_DEV_PR_ATTR(_name, _mode) \
1042 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1043 __CONFIGFS_EATTR(_name, _mode, \
1044 target_core_dev_pr_show_attr_##_name, \
1045 target_core_dev_pr_store_attr_##_name);
1046
1047 #define SE_DEV_PR_ATTR_RO(_name); \
1048 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1049 __CONFIGFS_EATTR_RO(_name, \
1050 target_core_dev_pr_show_attr_##_name);
1051
1052 /*
1053 * res_holder
1054 */
1055 static ssize_t target_core_dev_pr_show_spc3_res(
1056 struct se_device *dev,
1057 char *page,
1058 ssize_t *len)
1059 {
1060 struct se_node_acl *se_nacl;
1061 struct t10_pr_registration *pr_reg;
1062 char i_buf[PR_REG_ISID_ID_LEN];
1063 int prf_isid;
1064
1065 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1066
1067 spin_lock(&dev->dev_reservation_lock);
1068 pr_reg = dev->dev_pr_res_holder;
1069 if (!(pr_reg)) {
1070 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1071 spin_unlock(&dev->dev_reservation_lock);
1072 return *len;
1073 }
1074 se_nacl = pr_reg->pr_reg_nacl;
1075 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1076 PR_REG_ISID_ID_LEN);
1077
1078 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1079 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1080 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1081 spin_unlock(&dev->dev_reservation_lock);
1082
1083 return *len;
1084 }
1085
1086 static ssize_t target_core_dev_pr_show_spc2_res(
1087 struct se_device *dev,
1088 char *page,
1089 ssize_t *len)
1090 {
1091 struct se_node_acl *se_nacl;
1092
1093 spin_lock(&dev->dev_reservation_lock);
1094 se_nacl = dev->dev_reserved_node_acl;
1095 if (!(se_nacl)) {
1096 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1097 spin_unlock(&dev->dev_reservation_lock);
1098 return *len;
1099 }
1100 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1101 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1102 se_nacl->initiatorname);
1103 spin_unlock(&dev->dev_reservation_lock);
1104
1105 return *len;
1106 }
1107
1108 static ssize_t target_core_dev_pr_show_attr_res_holder(
1109 struct se_subsystem_dev *su_dev,
1110 char *page)
1111 {
1112 ssize_t len = 0;
1113
1114 if (!(su_dev->se_dev_ptr))
1115 return -ENODEV;
1116
1117 switch (su_dev->t10_pr.res_type) {
1118 case SPC3_PERSISTENT_RESERVATIONS:
1119 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1120 page, &len);
1121 break;
1122 case SPC2_RESERVATIONS:
1123 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1124 page, &len);
1125 break;
1126 case SPC_PASSTHROUGH:
1127 len += sprintf(page+len, "Passthrough\n");
1128 break;
1129 default:
1130 len += sprintf(page+len, "Unknown\n");
1131 break;
1132 }
1133
1134 return len;
1135 }
1136
1137 SE_DEV_PR_ATTR_RO(res_holder);
1138
1139 /*
1140 * res_pr_all_tgt_pts
1141 */
1142 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1143 struct se_subsystem_dev *su_dev,
1144 char *page)
1145 {
1146 struct se_device *dev;
1147 struct t10_pr_registration *pr_reg;
1148 ssize_t len = 0;
1149
1150 dev = su_dev->se_dev_ptr;
1151 if (!(dev))
1152 return -ENODEV;
1153
1154 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1155 return len;
1156
1157 spin_lock(&dev->dev_reservation_lock);
1158 pr_reg = dev->dev_pr_res_holder;
1159 if (!(pr_reg)) {
1160 len = sprintf(page, "No SPC-3 Reservation holder\n");
1161 spin_unlock(&dev->dev_reservation_lock);
1162 return len;
1163 }
1164 /*
1165 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1166 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1167 */
1168 if (pr_reg->pr_reg_all_tg_pt)
1169 len = sprintf(page, "SPC-3 Reservation: All Target"
1170 " Ports registration\n");
1171 else
1172 len = sprintf(page, "SPC-3 Reservation: Single"
1173 " Target Port registration\n");
1174 spin_unlock(&dev->dev_reservation_lock);
1175
1176 return len;
1177 }
1178
1179 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1180
1181 /*
1182 * res_pr_generation
1183 */
1184 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1185 struct se_subsystem_dev *su_dev,
1186 char *page)
1187 {
1188 if (!(su_dev->se_dev_ptr))
1189 return -ENODEV;
1190
1191 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1192 return 0;
1193
1194 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1195 }
1196
1197 SE_DEV_PR_ATTR_RO(res_pr_generation);
1198
1199 /*
1200 * res_pr_holder_tg_port
1201 */
1202 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1203 struct se_subsystem_dev *su_dev,
1204 char *page)
1205 {
1206 struct se_device *dev;
1207 struct se_node_acl *se_nacl;
1208 struct se_lun *lun;
1209 struct se_portal_group *se_tpg;
1210 struct t10_pr_registration *pr_reg;
1211 struct target_core_fabric_ops *tfo;
1212 ssize_t len = 0;
1213
1214 dev = su_dev->se_dev_ptr;
1215 if (!(dev))
1216 return -ENODEV;
1217
1218 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1219 return len;
1220
1221 spin_lock(&dev->dev_reservation_lock);
1222 pr_reg = dev->dev_pr_res_holder;
1223 if (!(pr_reg)) {
1224 len = sprintf(page, "No SPC-3 Reservation holder\n");
1225 spin_unlock(&dev->dev_reservation_lock);
1226 return len;
1227 }
1228 se_nacl = pr_reg->pr_reg_nacl;
1229 se_tpg = se_nacl->se_tpg;
1230 lun = pr_reg->pr_reg_tg_pt_lun;
1231 tfo = se_tpg->se_tpg_tfo;
1232
1233 len += sprintf(page+len, "SPC-3 Reservation: %s"
1234 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1235 tfo->tpg_get_wwn(se_tpg));
1236 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1237 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1238 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1239 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1240 tfo->get_fabric_name(), lun->unpacked_lun);
1241 spin_unlock(&dev->dev_reservation_lock);
1242
1243 return len;
1244 }
1245
1246 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1247
1248 /*
1249 * res_pr_registered_i_pts
1250 */
1251 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1252 struct se_subsystem_dev *su_dev,
1253 char *page)
1254 {
1255 struct target_core_fabric_ops *tfo;
1256 struct t10_pr_registration *pr_reg;
1257 unsigned char buf[384];
1258 char i_buf[PR_REG_ISID_ID_LEN];
1259 ssize_t len = 0;
1260 int reg_count = 0, prf_isid;
1261
1262 if (!(su_dev->se_dev_ptr))
1263 return -ENODEV;
1264
1265 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1266 return len;
1267
1268 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1269
1270 spin_lock(&su_dev->t10_pr.registration_lock);
1271 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1272 pr_reg_list) {
1273
1274 memset(buf, 0, 384);
1275 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1276 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1277 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1278 PR_REG_ISID_ID_LEN);
1279 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1280 tfo->get_fabric_name(),
1281 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1282 &i_buf[0] : "", pr_reg->pr_res_key,
1283 pr_reg->pr_res_generation);
1284
1285 if ((len + strlen(buf) >= PAGE_SIZE))
1286 break;
1287
1288 len += sprintf(page+len, "%s", buf);
1289 reg_count++;
1290 }
1291 spin_unlock(&su_dev->t10_pr.registration_lock);
1292
1293 if (!(reg_count))
1294 len += sprintf(page+len, "None\n");
1295
1296 return len;
1297 }
1298
1299 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1300
1301 /*
1302 * res_pr_type
1303 */
1304 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1305 struct se_subsystem_dev *su_dev,
1306 char *page)
1307 {
1308 struct se_device *dev;
1309 struct t10_pr_registration *pr_reg;
1310 ssize_t len = 0;
1311
1312 dev = su_dev->se_dev_ptr;
1313 if (!(dev))
1314 return -ENODEV;
1315
1316 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1317 return len;
1318
1319 spin_lock(&dev->dev_reservation_lock);
1320 pr_reg = dev->dev_pr_res_holder;
1321 if (!(pr_reg)) {
1322 len = sprintf(page, "No SPC-3 Reservation holder\n");
1323 spin_unlock(&dev->dev_reservation_lock);
1324 return len;
1325 }
1326 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1327 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1328 spin_unlock(&dev->dev_reservation_lock);
1329
1330 return len;
1331 }
1332
1333 SE_DEV_PR_ATTR_RO(res_pr_type);
1334
1335 /*
1336 * res_type
1337 */
1338 static ssize_t target_core_dev_pr_show_attr_res_type(
1339 struct se_subsystem_dev *su_dev,
1340 char *page)
1341 {
1342 ssize_t len = 0;
1343
1344 if (!(su_dev->se_dev_ptr))
1345 return -ENODEV;
1346
1347 switch (su_dev->t10_pr.res_type) {
1348 case SPC3_PERSISTENT_RESERVATIONS:
1349 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1350 break;
1351 case SPC2_RESERVATIONS:
1352 len = sprintf(page, "SPC2_RESERVATIONS\n");
1353 break;
1354 case SPC_PASSTHROUGH:
1355 len = sprintf(page, "SPC_PASSTHROUGH\n");
1356 break;
1357 default:
1358 len = sprintf(page, "UNKNOWN\n");
1359 break;
1360 }
1361
1362 return len;
1363 }
1364
1365 SE_DEV_PR_ATTR_RO(res_type);
1366
1367 /*
1368 * res_aptpl_active
1369 */
1370
1371 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1372 struct se_subsystem_dev *su_dev,
1373 char *page)
1374 {
1375 if (!(su_dev->se_dev_ptr))
1376 return -ENODEV;
1377
1378 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1379 return 0;
1380
1381 return sprintf(page, "APTPL Bit Status: %s\n",
1382 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1383 }
1384
1385 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1386
1387 /*
1388 * res_aptpl_metadata
1389 */
1390 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1391 struct se_subsystem_dev *su_dev,
1392 char *page)
1393 {
1394 if (!(su_dev->se_dev_ptr))
1395 return -ENODEV;
1396
1397 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1398 return 0;
1399
1400 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1401 }
1402
1403 enum {
1404 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1405 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1406 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1407 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1408 };
1409
1410 static match_table_t tokens = {
1411 {Opt_initiator_fabric, "initiator_fabric=%s"},
1412 {Opt_initiator_node, "initiator_node=%s"},
1413 {Opt_initiator_sid, "initiator_sid=%s"},
1414 {Opt_sa_res_key, "sa_res_key=%s"},
1415 {Opt_res_holder, "res_holder=%d"},
1416 {Opt_res_type, "res_type=%d"},
1417 {Opt_res_scope, "res_scope=%d"},
1418 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1419 {Opt_mapped_lun, "mapped_lun=%d"},
1420 {Opt_target_fabric, "target_fabric=%s"},
1421 {Opt_target_node, "target_node=%s"},
1422 {Opt_tpgt, "tpgt=%d"},
1423 {Opt_port_rtpi, "port_rtpi=%d"},
1424 {Opt_target_lun, "target_lun=%d"},
1425 {Opt_err, NULL}
1426 };
1427
1428 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1429 struct se_subsystem_dev *su_dev,
1430 const char *page,
1431 size_t count)
1432 {
1433 struct se_device *dev;
1434 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1435 unsigned char *t_fabric = NULL, *t_port = NULL;
1436 char *orig, *ptr, *arg_p, *opts;
1437 substring_t args[MAX_OPT_ARGS];
1438 unsigned long long tmp_ll;
1439 u64 sa_res_key = 0;
1440 u32 mapped_lun = 0, target_lun = 0;
1441 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1442 u16 port_rpti = 0, tpgt = 0;
1443 u8 type = 0, scope;
1444
1445 dev = su_dev->se_dev_ptr;
1446 if (!(dev))
1447 return -ENODEV;
1448
1449 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1450 return 0;
1451
1452 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1453 printk(KERN_INFO "Unable to process APTPL metadata while"
1454 " active fabric exports exist\n");
1455 return -EINVAL;
1456 }
1457
1458 opts = kstrdup(page, GFP_KERNEL);
1459 if (!opts)
1460 return -ENOMEM;
1461
1462 orig = opts;
1463 while ((ptr = strsep(&opts, ",")) != NULL) {
1464 if (!*ptr)
1465 continue;
1466
1467 token = match_token(ptr, tokens, args);
1468 switch (token) {
1469 case Opt_initiator_fabric:
1470 i_fabric = match_strdup(&args[0]);
1471 if (!i_fabric) {
1472 ret = -ENOMEM;
1473 goto out;
1474 }
1475 break;
1476 case Opt_initiator_node:
1477 i_port = match_strdup(&args[0]);
1478 if (!i_port) {
1479 ret = -ENOMEM;
1480 goto out;
1481 }
1482 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1483 printk(KERN_ERR "APTPL metadata initiator_node="
1484 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1485 PR_APTPL_MAX_IPORT_LEN);
1486 ret = -EINVAL;
1487 break;
1488 }
1489 break;
1490 case Opt_initiator_sid:
1491 isid = match_strdup(&args[0]);
1492 if (!isid) {
1493 ret = -ENOMEM;
1494 goto out;
1495 }
1496 if (strlen(isid) >= PR_REG_ISID_LEN) {
1497 printk(KERN_ERR "APTPL metadata initiator_isid"
1498 "= exceeds PR_REG_ISID_LEN: %d\n",
1499 PR_REG_ISID_LEN);
1500 ret = -EINVAL;
1501 break;
1502 }
1503 break;
1504 case Opt_sa_res_key:
1505 arg_p = match_strdup(&args[0]);
1506 if (!arg_p) {
1507 ret = -ENOMEM;
1508 goto out;
1509 }
1510 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1511 if (ret < 0) {
1512 printk(KERN_ERR "strict_strtoull() failed for"
1513 " sa_res_key=\n");
1514 goto out;
1515 }
1516 sa_res_key = (u64)tmp_ll;
1517 break;
1518 /*
1519 * PR APTPL Metadata for Reservation
1520 */
1521 case Opt_res_holder:
1522 match_int(args, &arg);
1523 res_holder = arg;
1524 break;
1525 case Opt_res_type:
1526 match_int(args, &arg);
1527 type = (u8)arg;
1528 break;
1529 case Opt_res_scope:
1530 match_int(args, &arg);
1531 scope = (u8)arg;
1532 break;
1533 case Opt_res_all_tg_pt:
1534 match_int(args, &arg);
1535 all_tg_pt = (int)arg;
1536 break;
1537 case Opt_mapped_lun:
1538 match_int(args, &arg);
1539 mapped_lun = (u32)arg;
1540 break;
1541 /*
1542 * PR APTPL Metadata for Target Port
1543 */
1544 case Opt_target_fabric:
1545 t_fabric = match_strdup(&args[0]);
1546 if (!t_fabric) {
1547 ret = -ENOMEM;
1548 goto out;
1549 }
1550 break;
1551 case Opt_target_node:
1552 t_port = match_strdup(&args[0]);
1553 if (!t_port) {
1554 ret = -ENOMEM;
1555 goto out;
1556 }
1557 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1558 printk(KERN_ERR "APTPL metadata target_node="
1559 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1560 PR_APTPL_MAX_TPORT_LEN);
1561 ret = -EINVAL;
1562 break;
1563 }
1564 break;
1565 case Opt_tpgt:
1566 match_int(args, &arg);
1567 tpgt = (u16)arg;
1568 break;
1569 case Opt_port_rtpi:
1570 match_int(args, &arg);
1571 port_rpti = (u16)arg;
1572 break;
1573 case Opt_target_lun:
1574 match_int(args, &arg);
1575 target_lun = (u32)arg;
1576 break;
1577 default:
1578 break;
1579 }
1580 }
1581
1582 if (!(i_port) || !(t_port) || !(sa_res_key)) {
1583 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1584 ret = -EINVAL;
1585 goto out;
1586 }
1587
1588 if (res_holder && !(type)) {
1589 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1590 " holder\n", type);
1591 ret = -EINVAL;
1592 goto out;
1593 }
1594
1595 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1596 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1597 res_holder, all_tg_pt, type);
1598 out:
1599 kfree(i_fabric);
1600 kfree(i_port);
1601 kfree(isid);
1602 kfree(t_fabric);
1603 kfree(t_port);
1604 kfree(orig);
1605 return (ret == 0) ? count : ret;
1606 }
1607
1608 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1609
1610 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1611
1612 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1613 &target_core_dev_pr_res_holder.attr,
1614 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1615 &target_core_dev_pr_res_pr_generation.attr,
1616 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1617 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1618 &target_core_dev_pr_res_pr_type.attr,
1619 &target_core_dev_pr_res_type.attr,
1620 &target_core_dev_pr_res_aptpl_active.attr,
1621 &target_core_dev_pr_res_aptpl_metadata.attr,
1622 NULL,
1623 };
1624
1625 static struct configfs_item_operations target_core_dev_pr_ops = {
1626 .show_attribute = target_core_dev_pr_attr_show,
1627 .store_attribute = target_core_dev_pr_attr_store,
1628 };
1629
1630 static struct config_item_type target_core_dev_pr_cit = {
1631 .ct_item_ops = &target_core_dev_pr_ops,
1632 .ct_attrs = target_core_dev_pr_attrs,
1633 .ct_owner = THIS_MODULE,
1634 };
1635
1636 /* End functions for struct config_item_type target_core_dev_pr_cit */
1637
1638 /* Start functions for struct config_item_type target_core_dev_cit */
1639
1640 static ssize_t target_core_show_dev_info(void *p, char *page)
1641 {
1642 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1643 struct se_hba *hba = se_dev->se_dev_hba;
1644 struct se_subsystem_api *t = hba->transport;
1645 int bl = 0;
1646 ssize_t read_bytes = 0;
1647
1648 if (!(se_dev->se_dev_ptr))
1649 return -ENODEV;
1650
1651 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1652 read_bytes += bl;
1653 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1654 return read_bytes;
1655 }
1656
1657 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1658 .attr = { .ca_owner = THIS_MODULE,
1659 .ca_name = "info",
1660 .ca_mode = S_IRUGO },
1661 .show = target_core_show_dev_info,
1662 .store = NULL,
1663 };
1664
1665 static ssize_t target_core_store_dev_control(
1666 void *p,
1667 const char *page,
1668 size_t count)
1669 {
1670 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1671 struct se_hba *hba = se_dev->se_dev_hba;
1672 struct se_subsystem_api *t = hba->transport;
1673
1674 if (!(se_dev->se_dev_su_ptr)) {
1675 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1676 "_dev_su_ptr\n");
1677 return -EINVAL;
1678 }
1679
1680 return t->set_configfs_dev_params(hba, se_dev, page, count);
1681 }
1682
1683 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1684 .attr = { .ca_owner = THIS_MODULE,
1685 .ca_name = "control",
1686 .ca_mode = S_IWUSR },
1687 .show = NULL,
1688 .store = target_core_store_dev_control,
1689 };
1690
1691 static ssize_t target_core_show_dev_alias(void *p, char *page)
1692 {
1693 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1694
1695 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1696 return 0;
1697
1698 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1699 }
1700
1701 static ssize_t target_core_store_dev_alias(
1702 void *p,
1703 const char *page,
1704 size_t count)
1705 {
1706 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1707 struct se_hba *hba = se_dev->se_dev_hba;
1708 ssize_t read_bytes;
1709
1710 if (count > (SE_DEV_ALIAS_LEN-1)) {
1711 printk(KERN_ERR "alias count: %d exceeds"
1712 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1713 SE_DEV_ALIAS_LEN-1);
1714 return -EINVAL;
1715 }
1716
1717 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1718 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1719 "%s", page);
1720
1721 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1722 config_item_name(&hba->hba_group.cg_item),
1723 config_item_name(&se_dev->se_dev_group.cg_item),
1724 se_dev->se_dev_alias);
1725
1726 return read_bytes;
1727 }
1728
1729 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1730 .attr = { .ca_owner = THIS_MODULE,
1731 .ca_name = "alias",
1732 .ca_mode = S_IRUGO | S_IWUSR },
1733 .show = target_core_show_dev_alias,
1734 .store = target_core_store_dev_alias,
1735 };
1736
1737 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1738 {
1739 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1740
1741 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1742 return 0;
1743
1744 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1745 }
1746
1747 static ssize_t target_core_store_dev_udev_path(
1748 void *p,
1749 const char *page,
1750 size_t count)
1751 {
1752 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1753 struct se_hba *hba = se_dev->se_dev_hba;
1754 ssize_t read_bytes;
1755
1756 if (count > (SE_UDEV_PATH_LEN-1)) {
1757 printk(KERN_ERR "udev_path count: %d exceeds"
1758 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1759 SE_UDEV_PATH_LEN-1);
1760 return -EINVAL;
1761 }
1762
1763 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1764 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1765 "%s", page);
1766
1767 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1768 config_item_name(&hba->hba_group.cg_item),
1769 config_item_name(&se_dev->se_dev_group.cg_item),
1770 se_dev->se_dev_udev_path);
1771
1772 return read_bytes;
1773 }
1774
1775 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1776 .attr = { .ca_owner = THIS_MODULE,
1777 .ca_name = "udev_path",
1778 .ca_mode = S_IRUGO | S_IWUSR },
1779 .show = target_core_show_dev_udev_path,
1780 .store = target_core_store_dev_udev_path,
1781 };
1782
1783 static ssize_t target_core_store_dev_enable(
1784 void *p,
1785 const char *page,
1786 size_t count)
1787 {
1788 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1789 struct se_device *dev;
1790 struct se_hba *hba = se_dev->se_dev_hba;
1791 struct se_subsystem_api *t = hba->transport;
1792 char *ptr;
1793
1794 ptr = strstr(page, "1");
1795 if (!(ptr)) {
1796 printk(KERN_ERR "For dev_enable ops, only valid value"
1797 " is \"1\"\n");
1798 return -EINVAL;
1799 }
1800 if ((se_dev->se_dev_ptr)) {
1801 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1802 " object\n");
1803 return -EEXIST;
1804 }
1805
1806 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1807 return -EINVAL;
1808
1809 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1810 if (IS_ERR(dev))
1811 return PTR_ERR(dev);
1812 else if (!dev)
1813 return -EINVAL;
1814
1815 se_dev->se_dev_ptr = dev;
1816 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1817 " %p\n", se_dev->se_dev_ptr);
1818
1819 return count;
1820 }
1821
1822 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1823 .attr = { .ca_owner = THIS_MODULE,
1824 .ca_name = "enable",
1825 .ca_mode = S_IWUSR },
1826 .show = NULL,
1827 .store = target_core_store_dev_enable,
1828 };
1829
1830 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1831 {
1832 struct se_device *dev;
1833 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1834 struct config_item *lu_ci;
1835 struct t10_alua_lu_gp *lu_gp;
1836 struct t10_alua_lu_gp_member *lu_gp_mem;
1837 ssize_t len = 0;
1838
1839 dev = su_dev->se_dev_ptr;
1840 if (!(dev))
1841 return -ENODEV;
1842
1843 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1844 return len;
1845
1846 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1847 if (!(lu_gp_mem)) {
1848 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1849 " pointer\n");
1850 return -EINVAL;
1851 }
1852
1853 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1854 lu_gp = lu_gp_mem->lu_gp;
1855 if ((lu_gp)) {
1856 lu_ci = &lu_gp->lu_gp_group.cg_item;
1857 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1858 config_item_name(lu_ci), lu_gp->lu_gp_id);
1859 }
1860 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1861
1862 return len;
1863 }
1864
1865 static ssize_t target_core_store_alua_lu_gp(
1866 void *p,
1867 const char *page,
1868 size_t count)
1869 {
1870 struct se_device *dev;
1871 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1872 struct se_hba *hba = su_dev->se_dev_hba;
1873 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1874 struct t10_alua_lu_gp_member *lu_gp_mem;
1875 unsigned char buf[LU_GROUP_NAME_BUF];
1876 int move = 0;
1877
1878 dev = su_dev->se_dev_ptr;
1879 if (!(dev))
1880 return -ENODEV;
1881
1882 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1883 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1884 config_item_name(&hba->hba_group.cg_item),
1885 config_item_name(&su_dev->se_dev_group.cg_item));
1886 return -EINVAL;
1887 }
1888 if (count > LU_GROUP_NAME_BUF) {
1889 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1890 return -EINVAL;
1891 }
1892 memset(buf, 0, LU_GROUP_NAME_BUF);
1893 memcpy(buf, page, count);
1894 /*
1895 * Any ALUA logical unit alias besides "NULL" means we will be
1896 * making a new group association.
1897 */
1898 if (strcmp(strstrip(buf), "NULL")) {
1899 /*
1900 * core_alua_get_lu_gp_by_name() will increment reference to
1901 * struct t10_alua_lu_gp. This reference is released with
1902 * core_alua_get_lu_gp_by_name below().
1903 */
1904 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1905 if (!(lu_gp_new))
1906 return -ENODEV;
1907 }
1908 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1909 if (!(lu_gp_mem)) {
1910 if (lu_gp_new)
1911 core_alua_put_lu_gp_from_name(lu_gp_new);
1912 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1913 " pointer\n");
1914 return -EINVAL;
1915 }
1916
1917 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1918 lu_gp = lu_gp_mem->lu_gp;
1919 if ((lu_gp)) {
1920 /*
1921 * Clearing an existing lu_gp association, and replacing
1922 * with NULL
1923 */
1924 if (!(lu_gp_new)) {
1925 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1926 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1927 " %hu\n",
1928 config_item_name(&hba->hba_group.cg_item),
1929 config_item_name(&su_dev->se_dev_group.cg_item),
1930 config_item_name(&lu_gp->lu_gp_group.cg_item),
1931 lu_gp->lu_gp_id);
1932
1933 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1934 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1935
1936 return count;
1937 }
1938 /*
1939 * Removing existing association of lu_gp_mem with lu_gp
1940 */
1941 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1942 move = 1;
1943 }
1944 /*
1945 * Associate lu_gp_mem with lu_gp_new.
1946 */
1947 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1948 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1949
1950 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1951 " core/alua/lu_gps/%s, ID: %hu\n",
1952 (move) ? "Moving" : "Adding",
1953 config_item_name(&hba->hba_group.cg_item),
1954 config_item_name(&su_dev->se_dev_group.cg_item),
1955 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1956 lu_gp_new->lu_gp_id);
1957
1958 core_alua_put_lu_gp_from_name(lu_gp_new);
1959 return count;
1960 }
1961
1962 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1963 .attr = { .ca_owner = THIS_MODULE,
1964 .ca_name = "alua_lu_gp",
1965 .ca_mode = S_IRUGO | S_IWUSR },
1966 .show = target_core_show_alua_lu_gp,
1967 .store = target_core_store_alua_lu_gp,
1968 };
1969
1970 static struct configfs_attribute *lio_core_dev_attrs[] = {
1971 &target_core_attr_dev_info.attr,
1972 &target_core_attr_dev_control.attr,
1973 &target_core_attr_dev_alias.attr,
1974 &target_core_attr_dev_udev_path.attr,
1975 &target_core_attr_dev_enable.attr,
1976 &target_core_attr_dev_alua_lu_gp.attr,
1977 NULL,
1978 };
1979
1980 static void target_core_dev_release(struct config_item *item)
1981 {
1982 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1983 struct se_subsystem_dev, se_dev_group);
1984 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1985 struct se_subsystem_api *t = hba->transport;
1986 struct config_group *dev_cg = &se_dev->se_dev_group;
1987
1988 kfree(dev_cg->default_groups);
1989 /*
1990 * This pointer will set when the storage is enabled with:
1991 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1992 */
1993 if (se_dev->se_dev_ptr) {
1994 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
1995 "virtual_device() for se_dev_ptr: %p\n",
1996 se_dev->se_dev_ptr);
1997
1998 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1999 } else {
2000 /*
2001 * Release struct se_subsystem_dev->se_dev_su_ptr..
2002 */
2003 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2004 "device() for se_dev_su_ptr: %p\n",
2005 se_dev->se_dev_su_ptr);
2006
2007 t->free_device(se_dev->se_dev_su_ptr);
2008 }
2009
2010 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2011 "_dev_t: %p\n", se_dev);
2012 kfree(se_dev);
2013 }
2014
2015 static ssize_t target_core_dev_show(struct config_item *item,
2016 struct configfs_attribute *attr,
2017 char *page)
2018 {
2019 struct se_subsystem_dev *se_dev = container_of(
2020 to_config_group(item), struct se_subsystem_dev,
2021 se_dev_group);
2022 struct target_core_configfs_attribute *tc_attr = container_of(
2023 attr, struct target_core_configfs_attribute, attr);
2024
2025 if (!(tc_attr->show))
2026 return -EINVAL;
2027
2028 return tc_attr->show(se_dev, page);
2029 }
2030
2031 static ssize_t target_core_dev_store(struct config_item *item,
2032 struct configfs_attribute *attr,
2033 const char *page, size_t count)
2034 {
2035 struct se_subsystem_dev *se_dev = container_of(
2036 to_config_group(item), struct se_subsystem_dev,
2037 se_dev_group);
2038 struct target_core_configfs_attribute *tc_attr = container_of(
2039 attr, struct target_core_configfs_attribute, attr);
2040
2041 if (!(tc_attr->store))
2042 return -EINVAL;
2043
2044 return tc_attr->store(se_dev, page, count);
2045 }
2046
2047 static struct configfs_item_operations target_core_dev_item_ops = {
2048 .release = target_core_dev_release,
2049 .show_attribute = target_core_dev_show,
2050 .store_attribute = target_core_dev_store,
2051 };
2052
2053 static struct config_item_type target_core_dev_cit = {
2054 .ct_item_ops = &target_core_dev_item_ops,
2055 .ct_attrs = lio_core_dev_attrs,
2056 .ct_owner = THIS_MODULE,
2057 };
2058
2059 /* End functions for struct config_item_type target_core_dev_cit */
2060
2061 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2062
2063 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2064 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2065 static struct target_core_alua_lu_gp_attribute \
2066 target_core_alua_lu_gp_##_name = \
2067 __CONFIGFS_EATTR(_name, _mode, \
2068 target_core_alua_lu_gp_show_attr_##_name, \
2069 target_core_alua_lu_gp_store_attr_##_name);
2070
2071 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2072 static struct target_core_alua_lu_gp_attribute \
2073 target_core_alua_lu_gp_##_name = \
2074 __CONFIGFS_EATTR_RO(_name, \
2075 target_core_alua_lu_gp_show_attr_##_name);
2076
2077 /*
2078 * lu_gp_id
2079 */
2080 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2081 struct t10_alua_lu_gp *lu_gp,
2082 char *page)
2083 {
2084 if (!(lu_gp->lu_gp_valid_id))
2085 return 0;
2086
2087 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2088 }
2089
2090 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2091 struct t10_alua_lu_gp *lu_gp,
2092 const char *page,
2093 size_t count)
2094 {
2095 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2096 unsigned long lu_gp_id;
2097 int ret;
2098
2099 ret = strict_strtoul(page, 0, &lu_gp_id);
2100 if (ret < 0) {
2101 printk(KERN_ERR "strict_strtoul() returned %d for"
2102 " lu_gp_id\n", ret);
2103 return -EINVAL;
2104 }
2105 if (lu_gp_id > 0x0000ffff) {
2106 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2107 " 0x0000ffff\n", lu_gp_id);
2108 return -EINVAL;
2109 }
2110
2111 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2112 if (ret < 0)
2113 return -EINVAL;
2114
2115 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2116 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2117 config_item_name(&alua_lu_gp_cg->cg_item),
2118 lu_gp->lu_gp_id);
2119
2120 return count;
2121 }
2122
2123 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2124
2125 /*
2126 * members
2127 */
2128 static ssize_t target_core_alua_lu_gp_show_attr_members(
2129 struct t10_alua_lu_gp *lu_gp,
2130 char *page)
2131 {
2132 struct se_device *dev;
2133 struct se_hba *hba;
2134 struct se_subsystem_dev *su_dev;
2135 struct t10_alua_lu_gp_member *lu_gp_mem;
2136 ssize_t len = 0, cur_len;
2137 unsigned char buf[LU_GROUP_NAME_BUF];
2138
2139 memset(buf, 0, LU_GROUP_NAME_BUF);
2140
2141 spin_lock(&lu_gp->lu_gp_lock);
2142 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2143 dev = lu_gp_mem->lu_gp_mem_dev;
2144 su_dev = dev->se_sub_dev;
2145 hba = su_dev->se_dev_hba;
2146
2147 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2148 config_item_name(&hba->hba_group.cg_item),
2149 config_item_name(&su_dev->se_dev_group.cg_item));
2150 cur_len++; /* Extra byte for NULL terminator */
2151
2152 if ((cur_len + len) > PAGE_SIZE) {
2153 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2154 "_members buffer\n");
2155 break;
2156 }
2157 memcpy(page+len, buf, cur_len);
2158 len += cur_len;
2159 }
2160 spin_unlock(&lu_gp->lu_gp_lock);
2161
2162 return len;
2163 }
2164
2165 SE_DEV_ALUA_LU_ATTR_RO(members);
2166
2167 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2168
2169 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2170 &target_core_alua_lu_gp_lu_gp_id.attr,
2171 &target_core_alua_lu_gp_members.attr,
2172 NULL,
2173 };
2174
2175 static void target_core_alua_lu_gp_release(struct config_item *item)
2176 {
2177 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2178 struct t10_alua_lu_gp, lu_gp_group);
2179
2180 core_alua_free_lu_gp(lu_gp);
2181 }
2182
2183 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2184 .release = target_core_alua_lu_gp_release,
2185 .show_attribute = target_core_alua_lu_gp_attr_show,
2186 .store_attribute = target_core_alua_lu_gp_attr_store,
2187 };
2188
2189 static struct config_item_type target_core_alua_lu_gp_cit = {
2190 .ct_item_ops = &target_core_alua_lu_gp_ops,
2191 .ct_attrs = target_core_alua_lu_gp_attrs,
2192 .ct_owner = THIS_MODULE,
2193 };
2194
2195 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2196
2197 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2198
2199 static struct config_group *target_core_alua_create_lu_gp(
2200 struct config_group *group,
2201 const char *name)
2202 {
2203 struct t10_alua_lu_gp *lu_gp;
2204 struct config_group *alua_lu_gp_cg = NULL;
2205 struct config_item *alua_lu_gp_ci = NULL;
2206
2207 lu_gp = core_alua_allocate_lu_gp(name, 0);
2208 if (IS_ERR(lu_gp))
2209 return NULL;
2210
2211 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2212 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2213
2214 config_group_init_type_name(alua_lu_gp_cg, name,
2215 &target_core_alua_lu_gp_cit);
2216
2217 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2218 " Group: core/alua/lu_gps/%s\n",
2219 config_item_name(alua_lu_gp_ci));
2220
2221 return alua_lu_gp_cg;
2222
2223 }
2224
2225 static void target_core_alua_drop_lu_gp(
2226 struct config_group *group,
2227 struct config_item *item)
2228 {
2229 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2230 struct t10_alua_lu_gp, lu_gp_group);
2231
2232 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2233 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2234 config_item_name(item), lu_gp->lu_gp_id);
2235 /*
2236 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2237 * -> target_core_alua_lu_gp_release()
2238 */
2239 config_item_put(item);
2240 }
2241
2242 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2243 .make_group = &target_core_alua_create_lu_gp,
2244 .drop_item = &target_core_alua_drop_lu_gp,
2245 };
2246
2247 static struct config_item_type target_core_alua_lu_gps_cit = {
2248 .ct_item_ops = NULL,
2249 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2250 .ct_owner = THIS_MODULE,
2251 };
2252
2253 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2254
2255 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2256
2257 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2258 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2259 static struct target_core_alua_tg_pt_gp_attribute \
2260 target_core_alua_tg_pt_gp_##_name = \
2261 __CONFIGFS_EATTR(_name, _mode, \
2262 target_core_alua_tg_pt_gp_show_attr_##_name, \
2263 target_core_alua_tg_pt_gp_store_attr_##_name);
2264
2265 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2266 static struct target_core_alua_tg_pt_gp_attribute \
2267 target_core_alua_tg_pt_gp_##_name = \
2268 __CONFIGFS_EATTR_RO(_name, \
2269 target_core_alua_tg_pt_gp_show_attr_##_name);
2270
2271 /*
2272 * alua_access_state
2273 */
2274 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2275 struct t10_alua_tg_pt_gp *tg_pt_gp,
2276 char *page)
2277 {
2278 return sprintf(page, "%d\n",
2279 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2280 }
2281
2282 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2283 struct t10_alua_tg_pt_gp *tg_pt_gp,
2284 const char *page,
2285 size_t count)
2286 {
2287 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2288 unsigned long tmp;
2289 int new_state, ret;
2290
2291 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2292 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2293 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2294 return -EINVAL;
2295 }
2296
2297 ret = strict_strtoul(page, 0, &tmp);
2298 if (ret < 0) {
2299 printk("Unable to extract new ALUA access state from"
2300 " %s\n", page);
2301 return -EINVAL;
2302 }
2303 new_state = (int)tmp;
2304
2305 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2306 printk(KERN_ERR "Unable to process implict configfs ALUA"
2307 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2308 return -EINVAL;
2309 }
2310
2311 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2312 NULL, NULL, new_state, 0);
2313 return (!ret) ? count : -EINVAL;
2314 }
2315
2316 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2317
2318 /*
2319 * alua_access_status
2320 */
2321 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2322 struct t10_alua_tg_pt_gp *tg_pt_gp,
2323 char *page)
2324 {
2325 return sprintf(page, "%s\n",
2326 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2327 }
2328
2329 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2330 struct t10_alua_tg_pt_gp *tg_pt_gp,
2331 const char *page,
2332 size_t count)
2333 {
2334 unsigned long tmp;
2335 int new_status, ret;
2336
2337 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2338 printk(KERN_ERR "Unable to do set ALUA access status on non"
2339 " valid tg_pt_gp ID: %hu\n",
2340 tg_pt_gp->tg_pt_gp_valid_id);
2341 return -EINVAL;
2342 }
2343
2344 ret = strict_strtoul(page, 0, &tmp);
2345 if (ret < 0) {
2346 printk(KERN_ERR "Unable to extract new ALUA access status"
2347 " from %s\n", page);
2348 return -EINVAL;
2349 }
2350 new_status = (int)tmp;
2351
2352 if ((new_status != ALUA_STATUS_NONE) &&
2353 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2354 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2355 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2356 new_status);
2357 return -EINVAL;
2358 }
2359
2360 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2361 return count;
2362 }
2363
2364 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2365
2366 /*
2367 * alua_access_type
2368 */
2369 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2370 struct t10_alua_tg_pt_gp *tg_pt_gp,
2371 char *page)
2372 {
2373 return core_alua_show_access_type(tg_pt_gp, page);
2374 }
2375
2376 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2377 struct t10_alua_tg_pt_gp *tg_pt_gp,
2378 const char *page,
2379 size_t count)
2380 {
2381 return core_alua_store_access_type(tg_pt_gp, page, count);
2382 }
2383
2384 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2385
2386 /*
2387 * alua_write_metadata
2388 */
2389 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2390 struct t10_alua_tg_pt_gp *tg_pt_gp,
2391 char *page)
2392 {
2393 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2394 }
2395
2396 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2397 struct t10_alua_tg_pt_gp *tg_pt_gp,
2398 const char *page,
2399 size_t count)
2400 {
2401 unsigned long tmp;
2402 int ret;
2403
2404 ret = strict_strtoul(page, 0, &tmp);
2405 if (ret < 0) {
2406 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2407 return -EINVAL;
2408 }
2409
2410 if ((tmp != 0) && (tmp != 1)) {
2411 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2412 " %lu\n", tmp);
2413 return -EINVAL;
2414 }
2415 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2416
2417 return count;
2418 }
2419
2420 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2421
2422
2423
2424 /*
2425 * nonop_delay_msecs
2426 */
2427 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2428 struct t10_alua_tg_pt_gp *tg_pt_gp,
2429 char *page)
2430 {
2431 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2432
2433 }
2434
2435 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2436 struct t10_alua_tg_pt_gp *tg_pt_gp,
2437 const char *page,
2438 size_t count)
2439 {
2440 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2441 }
2442
2443 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2444
2445 /*
2446 * trans_delay_msecs
2447 */
2448 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2449 struct t10_alua_tg_pt_gp *tg_pt_gp,
2450 char *page)
2451 {
2452 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2453 }
2454
2455 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2456 struct t10_alua_tg_pt_gp *tg_pt_gp,
2457 const char *page,
2458 size_t count)
2459 {
2460 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2461 }
2462
2463 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2464
2465 /*
2466 * preferred
2467 */
2468
2469 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2470 struct t10_alua_tg_pt_gp *tg_pt_gp,
2471 char *page)
2472 {
2473 return core_alua_show_preferred_bit(tg_pt_gp, page);
2474 }
2475
2476 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2477 struct t10_alua_tg_pt_gp *tg_pt_gp,
2478 const char *page,
2479 size_t count)
2480 {
2481 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2482 }
2483
2484 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2485
2486 /*
2487 * tg_pt_gp_id
2488 */
2489 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2490 struct t10_alua_tg_pt_gp *tg_pt_gp,
2491 char *page)
2492 {
2493 if (!(tg_pt_gp->tg_pt_gp_valid_id))
2494 return 0;
2495
2496 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2497 }
2498
2499 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2500 struct t10_alua_tg_pt_gp *tg_pt_gp,
2501 const char *page,
2502 size_t count)
2503 {
2504 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2505 unsigned long tg_pt_gp_id;
2506 int ret;
2507
2508 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2509 if (ret < 0) {
2510 printk(KERN_ERR "strict_strtoul() returned %d for"
2511 " tg_pt_gp_id\n", ret);
2512 return -EINVAL;
2513 }
2514 if (tg_pt_gp_id > 0x0000ffff) {
2515 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2516 " 0x0000ffff\n", tg_pt_gp_id);
2517 return -EINVAL;
2518 }
2519
2520 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2521 if (ret < 0)
2522 return -EINVAL;
2523
2524 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2525 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2526 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2527 tg_pt_gp->tg_pt_gp_id);
2528
2529 return count;
2530 }
2531
2532 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2533
2534 /*
2535 * members
2536 */
2537 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2538 struct t10_alua_tg_pt_gp *tg_pt_gp,
2539 char *page)
2540 {
2541 struct se_port *port;
2542 struct se_portal_group *tpg;
2543 struct se_lun *lun;
2544 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2545 ssize_t len = 0, cur_len;
2546 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2547
2548 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2549
2550 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2551 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2552 tg_pt_gp_mem_list) {
2553 port = tg_pt_gp_mem->tg_pt;
2554 tpg = port->sep_tpg;
2555 lun = port->sep_lun;
2556
2557 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2558 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2559 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2560 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2561 config_item_name(&lun->lun_group.cg_item));
2562 cur_len++; /* Extra byte for NULL terminator */
2563
2564 if ((cur_len + len) > PAGE_SIZE) {
2565 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2566 "_members buffer\n");
2567 break;
2568 }
2569 memcpy(page+len, buf, cur_len);
2570 len += cur_len;
2571 }
2572 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2573
2574 return len;
2575 }
2576
2577 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2578
2579 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2580 tg_pt_gp_group);
2581
2582 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2583 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2584 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2585 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2586 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2587 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2588 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2589 &target_core_alua_tg_pt_gp_preferred.attr,
2590 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2591 &target_core_alua_tg_pt_gp_members.attr,
2592 NULL,
2593 };
2594
2595 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2596 {
2597 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2598 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2599
2600 core_alua_free_tg_pt_gp(tg_pt_gp);
2601 }
2602
2603 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2604 .release = target_core_alua_tg_pt_gp_release,
2605 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2606 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2607 };
2608
2609 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2610 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2611 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2612 .ct_owner = THIS_MODULE,
2613 };
2614
2615 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2616
2617 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2618
2619 static struct config_group *target_core_alua_create_tg_pt_gp(
2620 struct config_group *group,
2621 const char *name)
2622 {
2623 struct t10_alua *alua = container_of(group, struct t10_alua,
2624 alua_tg_pt_gps_group);
2625 struct t10_alua_tg_pt_gp *tg_pt_gp;
2626 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2627 struct config_group *alua_tg_pt_gp_cg = NULL;
2628 struct config_item *alua_tg_pt_gp_ci = NULL;
2629
2630 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2631 if (!(tg_pt_gp))
2632 return NULL;
2633
2634 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2635 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2636
2637 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2638 &target_core_alua_tg_pt_gp_cit);
2639
2640 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2641 " Group: alua/tg_pt_gps/%s\n",
2642 config_item_name(alua_tg_pt_gp_ci));
2643
2644 return alua_tg_pt_gp_cg;
2645 }
2646
2647 static void target_core_alua_drop_tg_pt_gp(
2648 struct config_group *group,
2649 struct config_item *item)
2650 {
2651 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2652 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2653
2654 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2655 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2656 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2657 /*
2658 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2659 * -> target_core_alua_tg_pt_gp_release().
2660 */
2661 config_item_put(item);
2662 }
2663
2664 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2665 .make_group = &target_core_alua_create_tg_pt_gp,
2666 .drop_item = &target_core_alua_drop_tg_pt_gp,
2667 };
2668
2669 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2670 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2671 .ct_owner = THIS_MODULE,
2672 };
2673
2674 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2675
2676 /* Start functions for struct config_item_type target_core_alua_cit */
2677
2678 /*
2679 * target_core_alua_cit is a ConfigFS group that lives under
2680 * /sys/kernel/config/target/core/alua. There are default groups
2681 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2682 * target_core_alua_cit in target_core_init_configfs() below.
2683 */
2684 static struct config_item_type target_core_alua_cit = {
2685 .ct_item_ops = NULL,
2686 .ct_attrs = NULL,
2687 .ct_owner = THIS_MODULE,
2688 };
2689
2690 /* End functions for struct config_item_type target_core_alua_cit */
2691
2692 /* Start functions for struct config_item_type target_core_stat_cit */
2693
2694 static struct config_group *target_core_stat_mkdir(
2695 struct config_group *group,
2696 const char *name)
2697 {
2698 return ERR_PTR(-ENOSYS);
2699 }
2700
2701 static void target_core_stat_rmdir(
2702 struct config_group *group,
2703 struct config_item *item)
2704 {
2705 return;
2706 }
2707
2708 static struct configfs_group_operations target_core_stat_group_ops = {
2709 .make_group = &target_core_stat_mkdir,
2710 .drop_item = &target_core_stat_rmdir,
2711 };
2712
2713 static struct config_item_type target_core_stat_cit = {
2714 .ct_group_ops = &target_core_stat_group_ops,
2715 .ct_owner = THIS_MODULE,
2716 };
2717
2718 /* End functions for struct config_item_type target_core_stat_cit */
2719
2720 /* Start functions for struct config_item_type target_core_hba_cit */
2721
2722 static struct config_group *target_core_make_subdev(
2723 struct config_group *group,
2724 const char *name)
2725 {
2726 struct t10_alua_tg_pt_gp *tg_pt_gp;
2727 struct se_subsystem_dev *se_dev;
2728 struct se_subsystem_api *t;
2729 struct config_item *hba_ci = &group->cg_item;
2730 struct se_hba *hba = item_to_hba(hba_ci);
2731 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2732 struct config_group *dev_stat_grp = NULL;
2733 int errno = -ENOMEM, ret;
2734
2735 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2736 if (ret)
2737 return ERR_PTR(ret);
2738 /*
2739 * Locate the struct se_subsystem_api from parent's struct se_hba.
2740 */
2741 t = hba->transport;
2742
2743 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2744 if (!se_dev) {
2745 printk(KERN_ERR "Unable to allocate memory for"
2746 " struct se_subsystem_dev\n");
2747 goto unlock;
2748 }
2749 INIT_LIST_HEAD(&se_dev->se_dev_node);
2750 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2751 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2752 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2753 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2754 spin_lock_init(&se_dev->t10_pr.registration_lock);
2755 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2756 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2757 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2758 spin_lock_init(&se_dev->se_dev_lock);
2759 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2760 se_dev->t10_wwn.t10_sub_dev = se_dev;
2761 se_dev->t10_alua.t10_sub_dev = se_dev;
2762 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2763
2764 se_dev->se_dev_hba = hba;
2765 dev_cg = &se_dev->se_dev_group;
2766
2767 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2768 GFP_KERNEL);
2769 if (!(dev_cg->default_groups))
2770 goto out;
2771 /*
2772 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2773 * for ->allocate_virtdevice()
2774 *
2775 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2776 * has been called successfully in the next level up in the
2777 * configfs tree for device object's struct config_group.
2778 */
2779 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2780 if (!(se_dev->se_dev_su_ptr)) {
2781 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2782 " from allocate_virtdevice()\n");
2783 goto out;
2784 }
2785 spin_lock(&se_device_lock);
2786 list_add_tail(&se_dev->se_dev_node, &se_dev_list);
2787 spin_unlock(&se_device_lock);
2788
2789 config_group_init_type_name(&se_dev->se_dev_group, name,
2790 &target_core_dev_cit);
2791 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2792 &target_core_dev_attrib_cit);
2793 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2794 &target_core_dev_pr_cit);
2795 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2796 &target_core_dev_wwn_cit);
2797 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2798 "alua", &target_core_alua_tg_pt_gps_cit);
2799 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2800 "statistics", &target_core_stat_cit);
2801
2802 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2803 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2804 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2805 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2806 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2807 dev_cg->default_groups[5] = NULL;
2808 /*
2809 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2810 */
2811 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2812 if (!(tg_pt_gp))
2813 goto out;
2814
2815 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2816 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2817 GFP_KERNEL);
2818 if (!(tg_pt_gp_cg->default_groups)) {
2819 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2820 "default_groups\n");
2821 goto out;
2822 }
2823
2824 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2825 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2826 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2827 tg_pt_gp_cg->default_groups[1] = NULL;
2828 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2829 /*
2830 * Add core/$HBA/$DEV/statistics/ default groups
2831 */
2832 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2833 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2834 GFP_KERNEL);
2835 if (!dev_stat_grp->default_groups) {
2836 printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n");
2837 goto out;
2838 }
2839 target_stat_setup_dev_default_groups(se_dev);
2840
2841 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2842 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2843
2844 mutex_unlock(&hba->hba_access_mutex);
2845 return &se_dev->se_dev_group;
2846 out:
2847 if (se_dev->t10_alua.default_tg_pt_gp) {
2848 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2849 se_dev->t10_alua.default_tg_pt_gp = NULL;
2850 }
2851 if (dev_stat_grp)
2852 kfree(dev_stat_grp->default_groups);
2853 if (tg_pt_gp_cg)
2854 kfree(tg_pt_gp_cg->default_groups);
2855 if (dev_cg)
2856 kfree(dev_cg->default_groups);
2857 if (se_dev->se_dev_su_ptr)
2858 t->free_device(se_dev->se_dev_su_ptr);
2859 kfree(se_dev);
2860 unlock:
2861 mutex_unlock(&hba->hba_access_mutex);
2862 return ERR_PTR(errno);
2863 }
2864
2865 static void target_core_drop_subdev(
2866 struct config_group *group,
2867 struct config_item *item)
2868 {
2869 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2870 struct se_subsystem_dev, se_dev_group);
2871 struct se_hba *hba;
2872 struct se_subsystem_api *t;
2873 struct config_item *df_item;
2874 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2875 int i;
2876
2877 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2878
2879 mutex_lock(&hba->hba_access_mutex);
2880 t = hba->transport;
2881
2882 spin_lock(&se_device_lock);
2883 list_del(&se_dev->se_dev_node);
2884 spin_unlock(&se_device_lock);
2885
2886 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2887 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2888 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2889 dev_stat_grp->default_groups[i] = NULL;
2890 config_item_put(df_item);
2891 }
2892 kfree(dev_stat_grp->default_groups);
2893
2894 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2895 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2896 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2897 tg_pt_gp_cg->default_groups[i] = NULL;
2898 config_item_put(df_item);
2899 }
2900 kfree(tg_pt_gp_cg->default_groups);
2901 /*
2902 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2903 * directly from target_core_alua_tg_pt_gp_release().
2904 */
2905 se_dev->t10_alua.default_tg_pt_gp = NULL;
2906
2907 dev_cg = &se_dev->se_dev_group;
2908 for (i = 0; dev_cg->default_groups[i]; i++) {
2909 df_item = &dev_cg->default_groups[i]->cg_item;
2910 dev_cg->default_groups[i] = NULL;
2911 config_item_put(df_item);
2912 }
2913 /*
2914 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2915 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2916 */
2917 config_item_put(item);
2918 mutex_unlock(&hba->hba_access_mutex);
2919 }
2920
2921 static struct configfs_group_operations target_core_hba_group_ops = {
2922 .make_group = target_core_make_subdev,
2923 .drop_item = target_core_drop_subdev,
2924 };
2925
2926 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2927 #define SE_HBA_ATTR(_name, _mode) \
2928 static struct target_core_hba_attribute \
2929 target_core_hba_##_name = \
2930 __CONFIGFS_EATTR(_name, _mode, \
2931 target_core_hba_show_attr_##_name, \
2932 target_core_hba_store_attr_##_name);
2933
2934 #define SE_HBA_ATTR_RO(_name) \
2935 static struct target_core_hba_attribute \
2936 target_core_hba_##_name = \
2937 __CONFIGFS_EATTR_RO(_name, \
2938 target_core_hba_show_attr_##_name);
2939
2940 static ssize_t target_core_hba_show_attr_hba_info(
2941 struct se_hba *hba,
2942 char *page)
2943 {
2944 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2945 hba->hba_id, hba->transport->name,
2946 TARGET_CORE_CONFIGFS_VERSION);
2947 }
2948
2949 SE_HBA_ATTR_RO(hba_info);
2950
2951 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2952 char *page)
2953 {
2954 int hba_mode = 0;
2955
2956 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2957 hba_mode = 1;
2958
2959 return sprintf(page, "%d\n", hba_mode);
2960 }
2961
2962 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2963 const char *page, size_t count)
2964 {
2965 struct se_subsystem_api *transport = hba->transport;
2966 unsigned long mode_flag;
2967 int ret;
2968
2969 if (transport->pmode_enable_hba == NULL)
2970 return -EINVAL;
2971
2972 ret = strict_strtoul(page, 0, &mode_flag);
2973 if (ret < 0) {
2974 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2975 return -EINVAL;
2976 }
2977
2978 spin_lock(&hba->device_lock);
2979 if (!(list_empty(&hba->hba_dev_list))) {
2980 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2981 spin_unlock(&hba->device_lock);
2982 return -EINVAL;
2983 }
2984 spin_unlock(&hba->device_lock);
2985
2986 ret = transport->pmode_enable_hba(hba, mode_flag);
2987 if (ret < 0)
2988 return -EINVAL;
2989 if (ret > 0)
2990 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2991 else if (ret == 0)
2992 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2993
2994 return count;
2995 }
2996
2997 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2998
2999 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3000
3001 static void target_core_hba_release(struct config_item *item)
3002 {
3003 struct se_hba *hba = container_of(to_config_group(item),
3004 struct se_hba, hba_group);
3005 core_delete_hba(hba);
3006 }
3007
3008 static struct configfs_attribute *target_core_hba_attrs[] = {
3009 &target_core_hba_hba_info.attr,
3010 &target_core_hba_hba_mode.attr,
3011 NULL,
3012 };
3013
3014 static struct configfs_item_operations target_core_hba_item_ops = {
3015 .release = target_core_hba_release,
3016 .show_attribute = target_core_hba_attr_show,
3017 .store_attribute = target_core_hba_attr_store,
3018 };
3019
3020 static struct config_item_type target_core_hba_cit = {
3021 .ct_item_ops = &target_core_hba_item_ops,
3022 .ct_group_ops = &target_core_hba_group_ops,
3023 .ct_attrs = target_core_hba_attrs,
3024 .ct_owner = THIS_MODULE,
3025 };
3026
3027 static struct config_group *target_core_call_addhbatotarget(
3028 struct config_group *group,
3029 const char *name)
3030 {
3031 char *se_plugin_str, *str, *str2;
3032 struct se_hba *hba;
3033 char buf[TARGET_CORE_NAME_MAX_LEN];
3034 unsigned long plugin_dep_id = 0;
3035 int ret;
3036
3037 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3038 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3039 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
3040 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3041 TARGET_CORE_NAME_MAX_LEN);
3042 return ERR_PTR(-ENAMETOOLONG);
3043 }
3044 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3045
3046 str = strstr(buf, "_");
3047 if (!(str)) {
3048 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3049 return ERR_PTR(-EINVAL);
3050 }
3051 se_plugin_str = buf;
3052 /*
3053 * Special case for subsystem plugins that have "_" in their names.
3054 * Namely rd_direct and rd_mcp..
3055 */
3056 str2 = strstr(str+1, "_");
3057 if ((str2)) {
3058 *str2 = '\0'; /* Terminate for *se_plugin_str */
3059 str2++; /* Skip to start of plugin dependent ID */
3060 str = str2;
3061 } else {
3062 *str = '\0'; /* Terminate for *se_plugin_str */
3063 str++; /* Skip to start of plugin dependent ID */
3064 }
3065
3066 ret = strict_strtoul(str, 0, &plugin_dep_id);
3067 if (ret < 0) {
3068 printk(KERN_ERR "strict_strtoul() returned %d for"
3069 " plugin_dep_id\n", ret);
3070 return ERR_PTR(-EINVAL);
3071 }
3072 /*
3073 * Load up TCM subsystem plugins if they have not already been loaded.
3074 */
3075 if (transport_subsystem_check_init() < 0)
3076 return ERR_PTR(-EINVAL);
3077
3078 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3079 if (IS_ERR(hba))
3080 return ERR_CAST(hba);
3081
3082 config_group_init_type_name(&hba->hba_group, name,
3083 &target_core_hba_cit);
3084
3085 return &hba->hba_group;
3086 }
3087
3088 static void target_core_call_delhbafromtarget(
3089 struct config_group *group,
3090 struct config_item *item)
3091 {
3092 /*
3093 * core_delete_hba() is called from target_core_hba_item_ops->release()
3094 * -> target_core_hba_release()
3095 */
3096 config_item_put(item);
3097 }
3098
3099 static struct configfs_group_operations target_core_group_ops = {
3100 .make_group = target_core_call_addhbatotarget,
3101 .drop_item = target_core_call_delhbafromtarget,
3102 };
3103
3104 static struct config_item_type target_core_cit = {
3105 .ct_item_ops = NULL,
3106 .ct_group_ops = &target_core_group_ops,
3107 .ct_attrs = NULL,
3108 .ct_owner = THIS_MODULE,
3109 };
3110
3111 /* Stop functions for struct config_item_type target_core_hba_cit */
3112
3113 static int __init target_core_init_configfs(void)
3114 {
3115 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3116 struct config_group *lu_gp_cg = NULL;
3117 struct configfs_subsystem *subsys;
3118 struct t10_alua_lu_gp *lu_gp;
3119 int ret;
3120
3121 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3122 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3123 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3124
3125 subsys = target_core_subsystem[0];
3126 config_group_init(&subsys->su_group);
3127 mutex_init(&subsys->su_mutex);
3128
3129 INIT_LIST_HEAD(&g_tf_list);
3130 mutex_init(&g_tf_lock);
3131 ret = init_se_kmem_caches();
3132 if (ret < 0)
3133 return ret;
3134 /*
3135 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3136 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3137 */
3138 target_cg = &subsys->su_group;
3139 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3140 GFP_KERNEL);
3141 if (!(target_cg->default_groups)) {
3142 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3143 goto out_global;
3144 }
3145
3146 config_group_init_type_name(&target_core_hbagroup,
3147 "core", &target_core_cit);
3148 target_cg->default_groups[0] = &target_core_hbagroup;
3149 target_cg->default_groups[1] = NULL;
3150 /*
3151 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3152 */
3153 hba_cg = &target_core_hbagroup;
3154 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3155 GFP_KERNEL);
3156 if (!(hba_cg->default_groups)) {
3157 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3158 goto out_global;
3159 }
3160 config_group_init_type_name(&alua_group,
3161 "alua", &target_core_alua_cit);
3162 hba_cg->default_groups[0] = &alua_group;
3163 hba_cg->default_groups[1] = NULL;
3164 /*
3165 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3166 * groups under /sys/kernel/config/target/core/alua/
3167 */
3168 alua_cg = &alua_group;
3169 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3170 GFP_KERNEL);
3171 if (!(alua_cg->default_groups)) {
3172 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3173 goto out_global;
3174 }
3175
3176 config_group_init_type_name(&alua_lu_gps_group,
3177 "lu_gps", &target_core_alua_lu_gps_cit);
3178 alua_cg->default_groups[0] = &alua_lu_gps_group;
3179 alua_cg->default_groups[1] = NULL;
3180 /*
3181 * Add core/alua/lu_gps/default_lu_gp
3182 */
3183 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3184 if (IS_ERR(lu_gp))
3185 goto out_global;
3186
3187 lu_gp_cg = &alua_lu_gps_group;
3188 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3189 GFP_KERNEL);
3190 if (!(lu_gp_cg->default_groups)) {
3191 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3192 goto out_global;
3193 }
3194
3195 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3196 &target_core_alua_lu_gp_cit);
3197 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3198 lu_gp_cg->default_groups[1] = NULL;
3199 default_lu_gp = lu_gp;
3200 /*
3201 * Register the target_core_mod subsystem with configfs.
3202 */
3203 ret = configfs_register_subsystem(subsys);
3204 if (ret < 0) {
3205 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3206 ret, subsys->su_group.cg_item.ci_namebuf);
3207 goto out_global;
3208 }
3209 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3210 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3211 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3212 /*
3213 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3214 */
3215 ret = rd_module_init();
3216 if (ret < 0)
3217 goto out;
3218
3219 if (core_dev_setup_virtual_lun0() < 0)
3220 goto out;
3221
3222 return 0;
3223
3224 out:
3225 configfs_unregister_subsystem(subsys);
3226 core_dev_release_virtual_lun0();
3227 rd_module_exit();
3228 out_global:
3229 if (default_lu_gp) {
3230 core_alua_free_lu_gp(default_lu_gp);
3231 default_lu_gp = NULL;
3232 }
3233 if (lu_gp_cg)
3234 kfree(lu_gp_cg->default_groups);
3235 if (alua_cg)
3236 kfree(alua_cg->default_groups);
3237 if (hba_cg)
3238 kfree(hba_cg->default_groups);
3239 kfree(target_cg->default_groups);
3240 release_se_kmem_caches();
3241 return ret;
3242 }
3243
3244 static void __exit target_core_exit_configfs(void)
3245 {
3246 struct configfs_subsystem *subsys;
3247 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3248 struct config_item *item;
3249 int i;
3250
3251 subsys = target_core_subsystem[0];
3252
3253 lu_gp_cg = &alua_lu_gps_group;
3254 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3255 item = &lu_gp_cg->default_groups[i]->cg_item;
3256 lu_gp_cg->default_groups[i] = NULL;
3257 config_item_put(item);
3258 }
3259 kfree(lu_gp_cg->default_groups);
3260 lu_gp_cg->default_groups = NULL;
3261
3262 alua_cg = &alua_group;
3263 for (i = 0; alua_cg->default_groups[i]; i++) {
3264 item = &alua_cg->default_groups[i]->cg_item;
3265 alua_cg->default_groups[i] = NULL;
3266 config_item_put(item);
3267 }
3268 kfree(alua_cg->default_groups);
3269 alua_cg->default_groups = NULL;
3270
3271 hba_cg = &target_core_hbagroup;
3272 for (i = 0; hba_cg->default_groups[i]; i++) {
3273 item = &hba_cg->default_groups[i]->cg_item;
3274 hba_cg->default_groups[i] = NULL;
3275 config_item_put(item);
3276 }
3277 kfree(hba_cg->default_groups);
3278 hba_cg->default_groups = NULL;
3279 /*
3280 * We expect subsys->su_group.default_groups to be released
3281 * by configfs subsystem provider logic..
3282 */
3283 configfs_unregister_subsystem(subsys);
3284 kfree(subsys->su_group.default_groups);
3285
3286 core_alua_free_lu_gp(default_lu_gp);
3287 default_lu_gp = NULL;
3288
3289 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3290 " Infrastructure\n");
3291
3292 core_dev_release_virtual_lun0();
3293 rd_module_exit();
3294 release_se_kmem_caches();
3295 }
3296
3297 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3298 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3299 MODULE_LICENSE("GPL");
3300
3301 module_init(target_core_init_configfs);
3302 module_exit(target_core_exit_configfs);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree