aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/target/target_core_configfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/target/target_core_configfs.c')
-rw-r--r--drivers/target/target_core_configfs.c3225
1 files changed, 3225 insertions, 0 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
new file mode 100644
index 000000000000..2764510798b0
--- /dev/null
+++ b/drivers/target/target_core_configfs.c
@@ -0,0 +1,3225 @@
1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * Copyright (c) 2008-2010 Rising Tide Systems
7 * Copyright (c) 2008-2010 Linux-iSCSI.org
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/version.h>
27#include <generated/utsrelease.h>
28#include <linux/utsname.h>
29#include <linux/init.h>
30#include <linux/fs.h>
31#include <linux/namei.h>
32#include <linux/slab.h>
33#include <linux/types.h>
34#include <linux/delay.h>
35#include <linux/unistd.h>
36#include <linux/string.h>
37#include <linux/parser.h>
38#include <linux/syscalls.h>
39#include <linux/configfs.h>
40#include <linux/proc_fs.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
55static struct list_head g_tf_list;
56static struct mutex g_tf_lock;
57
58struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62};
63
64static inline struct se_hba *
65item_to_hba(struct config_item *item)
66{
67 return container_of(to_config_group(item), struct se_hba, hba_group);
68}
69
70/*
71 * Attributes for /sys/kernel/config/target/
72 */
73static ssize_t target_core_attr_show(struct config_item *item,
74 struct configfs_attribute *attr,
75 char *page)
76{
77 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
78 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
79 utsname()->sysname, utsname()->machine);
80}
81
82static struct configfs_item_operations target_core_fabric_item_ops = {
83 .show_attribute = target_core_attr_show,
84};
85
86static struct configfs_attribute target_core_item_attr_version = {
87 .ca_owner = THIS_MODULE,
88 .ca_name = "version",
89 .ca_mode = S_IRUGO,
90};
91
92static struct target_fabric_configfs *target_core_get_fabric(
93 const char *name)
94{
95 struct target_fabric_configfs *tf;
96
97 if (!(name))
98 return NULL;
99
100 mutex_lock(&g_tf_lock);
101 list_for_each_entry(tf, &g_tf_list, tf_list) {
102 if (!(strcmp(tf->tf_name, name))) {
103 atomic_inc(&tf->tf_access_cnt);
104 mutex_unlock(&g_tf_lock);
105 return tf;
106 }
107 }
108 mutex_unlock(&g_tf_lock);
109
110 return NULL;
111}
112
113/*
114 * Called from struct target_core_group_ops->make_group()
115 */
116static struct config_group *target_core_register_fabric(
117 struct config_group *group,
118 const char *name)
119{
120 struct target_fabric_configfs *tf;
121 int ret;
122
123 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
124 " %s\n", group, name);
125 /*
126 * Ensure that TCM subsystem plugins are loaded at this point for
127 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
128 * LUN symlinks.
129 */
130 if (transport_subsystem_check_init() < 0)
131 return ERR_PTR(-EINVAL);
132
133 /*
134 * Below are some hardcoded request_module() calls to automatically
135 * local fabric modules when the following is called:
136 *
137 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
138 *
139 * Note that this does not limit which TCM fabric module can be
140 * registered, but simply provids auto loading logic for modules with
141 * mkdir(2) system calls with known TCM fabric modules.
142 */
143 if (!(strncmp(name, "iscsi", 5))) {
144 /*
145 * Automatically load the LIO Target fabric module when the
146 * following is called:
147 *
148 * mkdir -p $CONFIGFS/target/iscsi
149 */
150 ret = request_module("iscsi_target_mod");
151 if (ret < 0) {
152 printk(KERN_ERR "request_module() failed for"
153 " iscsi_target_mod.ko: %d\n", ret);
154 return ERR_PTR(-EINVAL);
155 }
156 } else if (!(strncmp(name, "loopback", 8))) {
157 /*
158 * Automatically load the tcm_loop fabric module when the
159 * following is called:
160 *
161 * mkdir -p $CONFIGFS/target/loopback
162 */
163 ret = request_module("tcm_loop");
164 if (ret < 0) {
165 printk(KERN_ERR "request_module() failed for"
166 " tcm_loop.ko: %d\n", ret);
167 return ERR_PTR(-EINVAL);
168 }
169 }
170
171 tf = target_core_get_fabric(name);
172 if (!(tf)) {
173 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
174 name);
175 return ERR_PTR(-EINVAL);
176 }
177 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
178 " %s\n", tf->tf_name);
179 /*
180 * On a successful target_core_get_fabric() look, the returned
181 * struct target_fabric_configfs *tf will contain a usage reference.
182 */
183 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
184 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
185
186 tf->tf_group.default_groups = tf->tf_default_groups;
187 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
188 tf->tf_group.default_groups[1] = NULL;
189
190 config_group_init_type_name(&tf->tf_group, name,
191 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
192 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
193 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
194
195 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
196 " %s\n", tf->tf_group.cg_item.ci_name);
197 /*
198 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
199 */
200 tf->tf_ops.tf_subsys = tf->tf_subsys;
201 tf->tf_fabric = &tf->tf_group.cg_item;
202 printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
203 " for %s\n", name);
204
205 return &tf->tf_group;
206}
207
208/*
209 * Called from struct target_core_group_ops->drop_item()
210 */
211static void target_core_deregister_fabric(
212 struct config_group *group,
213 struct config_item *item)
214{
215 struct target_fabric_configfs *tf = container_of(
216 to_config_group(item), struct target_fabric_configfs, tf_group);
217 struct config_group *tf_group;
218 struct config_item *df_item;
219 int i;
220
221 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
222 " tf list\n", config_item_name(item));
223
224 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
225 " %s\n", tf->tf_name);
226 atomic_dec(&tf->tf_access_cnt);
227
228 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
229 " tf->tf_fabric for %s\n", tf->tf_name);
230 tf->tf_fabric = NULL;
231
232 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
233 " %s\n", config_item_name(item));
234
235 tf_group = &tf->tf_group;
236 for (i = 0; tf_group->default_groups[i]; i++) {
237 df_item = &tf_group->default_groups[i]->cg_item;
238 tf_group->default_groups[i] = NULL;
239 config_item_put(df_item);
240 }
241 config_item_put(item);
242}
243
244static struct configfs_group_operations target_core_fabric_group_ops = {
245 .make_group = &target_core_register_fabric,
246 .drop_item = &target_core_deregister_fabric,
247};
248
249/*
250 * All item attributes appearing in /sys/kernel/target/ appear here.
251 */
252static struct configfs_attribute *target_core_fabric_item_attrs[] = {
253 &target_core_item_attr_version,
254 NULL,
255};
256
257/*
258 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
259 */
260static struct config_item_type target_core_fabrics_item = {
261 .ct_item_ops = &target_core_fabric_item_ops,
262 .ct_group_ops = &target_core_fabric_group_ops,
263 .ct_attrs = target_core_fabric_item_attrs,
264 .ct_owner = THIS_MODULE,
265};
266
267static struct configfs_subsystem target_core_fabrics = {
268 .su_group = {
269 .cg_item = {
270 .ci_namebuf = "target",
271 .ci_type = &target_core_fabrics_item,
272 },
273 },
274};
275
276static struct configfs_subsystem *target_core_subsystem[] = {
277 &target_core_fabrics,
278 NULL,
279};
280
281/*##############################################################################
282// Start functions called by external Target Fabrics Modules
283//############################################################################*/
284
285/*
286 * First function called by fabric modules to:
287 *
288 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
289 * 2) Add struct target_fabric_configfs to g_tf_list
290 * 3) Return struct target_fabric_configfs to fabric module to be passed
291 * into target_fabric_configfs_register().
292 */
293struct target_fabric_configfs *target_fabric_configfs_init(
294 struct module *fabric_mod,
295 const char *name)
296{
297 struct target_fabric_configfs *tf;
298
299 if (!(fabric_mod)) {
300 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
301 return NULL;
302 }
303 if (!(name)) {
304 printk(KERN_ERR "Unable to locate passed fabric name\n");
305 return NULL;
306 }
307 if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
308 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
309 "_NAME_SIZE\n", name);
310 return NULL;
311 }
312
313 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
314 if (!(tf))
315 return ERR_PTR(-ENOMEM);
316
317 INIT_LIST_HEAD(&tf->tf_list);
318 atomic_set(&tf->tf_access_cnt, 0);
319 /*
320 * Setup the default generic struct config_item_type's (cits) in
321 * struct target_fabric_configfs->tf_cit_tmpl
322 */
323 tf->tf_module = fabric_mod;
324 target_fabric_setup_cits(tf);
325
326 tf->tf_subsys = target_core_subsystem[0];
327 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
328
329 mutex_lock(&g_tf_lock);
330 list_add_tail(&tf->tf_list, &g_tf_list);
331 mutex_unlock(&g_tf_lock);
332
333 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
334 ">>>>>>>>>>>>>>\n");
335 printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
336 " %s\n", tf, tf->tf_name);
337 return tf;
338}
339EXPORT_SYMBOL(target_fabric_configfs_init);
340
341/*
342 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
343 */
344void target_fabric_configfs_free(
345 struct target_fabric_configfs *tf)
346{
347 mutex_lock(&g_tf_lock);
348 list_del(&tf->tf_list);
349 mutex_unlock(&g_tf_lock);
350
351 kfree(tf);
352}
353EXPORT_SYMBOL(target_fabric_configfs_free);
354
355/*
356 * Perform a sanity check of the passed tf->tf_ops before completing
357 * TCM fabric module registration.
358 */
359static int target_fabric_tf_ops_check(
360 struct target_fabric_configfs *tf)
361{
362 struct target_core_fabric_ops *tfo = &tf->tf_ops;
363
364 if (!(tfo->get_fabric_name)) {
365 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
366 return -EINVAL;
367 }
368 if (!(tfo->get_fabric_proto_ident)) {
369 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
370 return -EINVAL;
371 }
372 if (!(tfo->tpg_get_wwn)) {
373 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
374 return -EINVAL;
375 }
376 if (!(tfo->tpg_get_tag)) {
377 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
378 return -EINVAL;
379 }
380 if (!(tfo->tpg_get_default_depth)) {
381 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
382 return -EINVAL;
383 }
384 if (!(tfo->tpg_get_pr_transport_id)) {
385 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
386 return -EINVAL;
387 }
388 if (!(tfo->tpg_get_pr_transport_id_len)) {
389 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
390 return -EINVAL;
391 }
392 if (!(tfo->tpg_check_demo_mode)) {
393 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
394 return -EINVAL;
395 }
396 if (!(tfo->tpg_check_demo_mode_cache)) {
397 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
398 return -EINVAL;
399 }
400 if (!(tfo->tpg_check_demo_mode_write_protect)) {
401 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
402 return -EINVAL;
403 }
404 if (!(tfo->tpg_check_prod_mode_write_protect)) {
405 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
406 return -EINVAL;
407 }
408 if (!(tfo->tpg_alloc_fabric_acl)) {
409 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
410 return -EINVAL;
411 }
412 if (!(tfo->tpg_release_fabric_acl)) {
413 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
414 return -EINVAL;
415 }
416 if (!(tfo->tpg_get_inst_index)) {
417 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
418 return -EINVAL;
419 }
420 if (!(tfo->release_cmd_to_pool)) {
421 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
422 return -EINVAL;
423 }
424 if (!(tfo->release_cmd_direct)) {
425 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
426 return -EINVAL;
427 }
428 if (!(tfo->shutdown_session)) {
429 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
430 return -EINVAL;
431 }
432 if (!(tfo->close_session)) {
433 printk(KERN_ERR "Missing tfo->close_session()\n");
434 return -EINVAL;
435 }
436 if (!(tfo->stop_session)) {
437 printk(KERN_ERR "Missing tfo->stop_session()\n");
438 return -EINVAL;
439 }
440 if (!(tfo->fall_back_to_erl0)) {
441 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
442 return -EINVAL;
443 }
444 if (!(tfo->sess_logged_in)) {
445 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
446 return -EINVAL;
447 }
448 if (!(tfo->sess_get_index)) {
449 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
450 return -EINVAL;
451 }
452 if (!(tfo->write_pending)) {
453 printk(KERN_ERR "Missing tfo->write_pending()\n");
454 return -EINVAL;
455 }
456 if (!(tfo->write_pending_status)) {
457 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
458 return -EINVAL;
459 }
460 if (!(tfo->set_default_node_attributes)) {
461 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
462 return -EINVAL;
463 }
464 if (!(tfo->get_task_tag)) {
465 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
466 return -EINVAL;
467 }
468 if (!(tfo->get_cmd_state)) {
469 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
470 return -EINVAL;
471 }
472 if (!(tfo->new_cmd_failure)) {
473 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
474 return -EINVAL;
475 }
476 if (!(tfo->queue_data_in)) {
477 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
478 return -EINVAL;
479 }
480 if (!(tfo->queue_status)) {
481 printk(KERN_ERR "Missing tfo->queue_status()\n");
482 return -EINVAL;
483 }
484 if (!(tfo->queue_tm_rsp)) {
485 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
486 return -EINVAL;
487 }
488 if (!(tfo->set_fabric_sense_len)) {
489 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
490 return -EINVAL;
491 }
492 if (!(tfo->get_fabric_sense_len)) {
493 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
494 return -EINVAL;
495 }
496 if (!(tfo->is_state_remove)) {
497 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
498 return -EINVAL;
499 }
500 if (!(tfo->pack_lun)) {
501 printk(KERN_ERR "Missing tfo->pack_lun()\n");
502 return -EINVAL;
503 }
504 /*
505 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
506 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
507 * target_core_fabric_configfs.c WWN+TPG group context code.
508 */
509 if (!(tfo->fabric_make_wwn)) {
510 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
511 return -EINVAL;
512 }
513 if (!(tfo->fabric_drop_wwn)) {
514 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
515 return -EINVAL;
516 }
517 if (!(tfo->fabric_make_tpg)) {
518 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
519 return -EINVAL;
520 }
521 if (!(tfo->fabric_drop_tpg)) {
522 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
523 return -EINVAL;
524 }
525
526 return 0;
527}
528
529/*
530 * Called 2nd from fabric module with returned parameter of
531 * struct target_fabric_configfs * from target_fabric_configfs_init().
532 *
533 * Upon a successful registration, the new fabric's struct config_item is
534 * return. Also, a pointer to this struct is set in the passed
535 * struct target_fabric_configfs.
536 */
537int target_fabric_configfs_register(
538 struct target_fabric_configfs *tf)
539{
540 struct config_group *su_group;
541 int ret;
542
543 if (!(tf)) {
544 printk(KERN_ERR "Unable to locate target_fabric_configfs"
545 " pointer\n");
546 return -EINVAL;
547 }
548 if (!(tf->tf_subsys)) {
549 printk(KERN_ERR "Unable to target struct config_subsystem"
550 " pointer\n");
551 return -EINVAL;
552 }
553 su_group = &tf->tf_subsys->su_group;
554 if (!(su_group)) {
555 printk(KERN_ERR "Unable to locate target struct config_group"
556 " pointer\n");
557 return -EINVAL;
558 }
559 ret = target_fabric_tf_ops_check(tf);
560 if (ret < 0)
561 return ret;
562
563 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
564 ">>>>>>>>>>\n");
565 return 0;
566}
567EXPORT_SYMBOL(target_fabric_configfs_register);
568
569void target_fabric_configfs_deregister(
570 struct target_fabric_configfs *tf)
571{
572 struct config_group *su_group;
573 struct configfs_subsystem *su;
574
575 if (!(tf)) {
576 printk(KERN_ERR "Unable to locate passed target_fabric_"
577 "configfs\n");
578 return;
579 }
580 su = tf->tf_subsys;
581 if (!(su)) {
582 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
583 " pointer\n");
584 return;
585 }
586 su_group = &tf->tf_subsys->su_group;
587 if (!(su_group)) {
588 printk(KERN_ERR "Unable to locate target struct config_group"
589 " pointer\n");
590 return;
591 }
592
593 printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
594 ">>>>>>>>>>>>\n");
595 mutex_lock(&g_tf_lock);
596 if (atomic_read(&tf->tf_access_cnt)) {
597 mutex_unlock(&g_tf_lock);
598 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
599 tf->tf_name);
600 BUG();
601 }
602 list_del(&tf->tf_list);
603 mutex_unlock(&g_tf_lock);
604
605 printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
606 " %s\n", tf->tf_name);
607 tf->tf_module = NULL;
608 tf->tf_subsys = NULL;
609 kfree(tf);
610
611 printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
612 ">>>>>\n");
613 return;
614}
615EXPORT_SYMBOL(target_fabric_configfs_deregister);
616
617/*##############################################################################
618// Stop functions called by external Target Fabrics Modules
619//############################################################################*/
620
621/* Start functions for struct config_item_type target_core_dev_attrib_cit */
622
623#define DEF_DEV_ATTRIB_SHOW(_name) \
624static ssize_t target_core_dev_show_attr_##_name( \
625 struct se_dev_attrib *da, \
626 char *page) \
627{ \
628 struct se_device *dev; \
629 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
630 ssize_t rb; \
631 \
632 spin_lock(&se_dev->se_dev_lock); \
633 dev = se_dev->se_dev_ptr; \
634 if (!(dev)) { \
635 spin_unlock(&se_dev->se_dev_lock); \
636 return -ENODEV; \
637 } \
638 rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
639 spin_unlock(&se_dev->se_dev_lock); \
640 \
641 return rb; \
642}
643
644#define DEF_DEV_ATTRIB_STORE(_name) \
645static ssize_t target_core_dev_store_attr_##_name( \
646 struct se_dev_attrib *da, \
647 const char *page, \
648 size_t count) \
649{ \
650 struct se_device *dev; \
651 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
652 unsigned long val; \
653 int ret; \
654 \
655 spin_lock(&se_dev->se_dev_lock); \
656 dev = se_dev->se_dev_ptr; \
657 if (!(dev)) { \
658 spin_unlock(&se_dev->se_dev_lock); \
659 return -ENODEV; \
660 } \
661 ret = strict_strtoul(page, 0, &val); \
662 if (ret < 0) { \
663 spin_unlock(&se_dev->se_dev_lock); \
664 printk(KERN_ERR "strict_strtoul() failed with" \
665 " ret: %d\n", ret); \
666 return -EINVAL; \
667 } \
668 ret = se_dev_set_##_name(dev, (u32)val); \
669 spin_unlock(&se_dev->se_dev_lock); \
670 \
671 return (!ret) ? count : -EINVAL; \
672}
673
674#define DEF_DEV_ATTRIB(_name) \
675DEF_DEV_ATTRIB_SHOW(_name); \
676DEF_DEV_ATTRIB_STORE(_name);
677
678#define DEF_DEV_ATTRIB_RO(_name) \
679DEF_DEV_ATTRIB_SHOW(_name);
680
681CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
682#define SE_DEV_ATTR(_name, _mode) \
683static struct target_core_dev_attrib_attribute \
684 target_core_dev_attrib_##_name = \
685 __CONFIGFS_EATTR(_name, _mode, \
686 target_core_dev_show_attr_##_name, \
687 target_core_dev_store_attr_##_name);
688
689#define SE_DEV_ATTR_RO(_name); \
690static struct target_core_dev_attrib_attribute \
691 target_core_dev_attrib_##_name = \
692 __CONFIGFS_EATTR_RO(_name, \
693 target_core_dev_show_attr_##_name);
694
695DEF_DEV_ATTRIB(emulate_dpo);
696SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
697
698DEF_DEV_ATTRIB(emulate_fua_write);
699SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
700
701DEF_DEV_ATTRIB(emulate_fua_read);
702SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
703
704DEF_DEV_ATTRIB(emulate_write_cache);
705SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
706
707DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
708SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
709
710DEF_DEV_ATTRIB(emulate_tas);
711SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
712
713DEF_DEV_ATTRIB(emulate_tpu);
714SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
715
716DEF_DEV_ATTRIB(emulate_tpws);
717SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
718
719DEF_DEV_ATTRIB(enforce_pr_isids);
720SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
721
722DEF_DEV_ATTRIB_RO(hw_block_size);
723SE_DEV_ATTR_RO(hw_block_size);
724
725DEF_DEV_ATTRIB(block_size);
726SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
727
728DEF_DEV_ATTRIB_RO(hw_max_sectors);
729SE_DEV_ATTR_RO(hw_max_sectors);
730
731DEF_DEV_ATTRIB(max_sectors);
732SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
733
734DEF_DEV_ATTRIB(optimal_sectors);
735SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
736
737DEF_DEV_ATTRIB_RO(hw_queue_depth);
738SE_DEV_ATTR_RO(hw_queue_depth);
739
740DEF_DEV_ATTRIB(queue_depth);
741SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
742
743DEF_DEV_ATTRIB(task_timeout);
744SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
745
746DEF_DEV_ATTRIB(max_unmap_lba_count);
747SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
748
749DEF_DEV_ATTRIB(max_unmap_block_desc_count);
750SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
751
752DEF_DEV_ATTRIB(unmap_granularity);
753SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
754
755DEF_DEV_ATTRIB(unmap_granularity_alignment);
756SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
757
758CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
759
760static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
761 &target_core_dev_attrib_emulate_dpo.attr,
762 &target_core_dev_attrib_emulate_fua_write.attr,
763 &target_core_dev_attrib_emulate_fua_read.attr,
764 &target_core_dev_attrib_emulate_write_cache.attr,
765 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
766 &target_core_dev_attrib_emulate_tas.attr,
767 &target_core_dev_attrib_emulate_tpu.attr,
768 &target_core_dev_attrib_emulate_tpws.attr,
769 &target_core_dev_attrib_enforce_pr_isids.attr,
770 &target_core_dev_attrib_hw_block_size.attr,
771 &target_core_dev_attrib_block_size.attr,
772 &target_core_dev_attrib_hw_max_sectors.attr,
773 &target_core_dev_attrib_max_sectors.attr,
774 &target_core_dev_attrib_optimal_sectors.attr,
775 &target_core_dev_attrib_hw_queue_depth.attr,
776 &target_core_dev_attrib_queue_depth.attr,
777 &target_core_dev_attrib_task_timeout.attr,
778 &target_core_dev_attrib_max_unmap_lba_count.attr,
779 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
780 &target_core_dev_attrib_unmap_granularity.attr,
781 &target_core_dev_attrib_unmap_granularity_alignment.attr,
782 NULL,
783};
784
785static struct configfs_item_operations target_core_dev_attrib_ops = {
786 .show_attribute = target_core_dev_attrib_attr_show,
787 .store_attribute = target_core_dev_attrib_attr_store,
788};
789
790static struct config_item_type target_core_dev_attrib_cit = {
791 .ct_item_ops = &target_core_dev_attrib_ops,
792 .ct_attrs = target_core_dev_attrib_attrs,
793 .ct_owner = THIS_MODULE,
794};
795
796/* End functions for struct config_item_type target_core_dev_attrib_cit */
797
798/* Start functions for struct config_item_type target_core_dev_wwn_cit */
799
800CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
801#define SE_DEV_WWN_ATTR(_name, _mode) \
802static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
803 __CONFIGFS_EATTR(_name, _mode, \
804 target_core_dev_wwn_show_attr_##_name, \
805 target_core_dev_wwn_store_attr_##_name);
806
807#define SE_DEV_WWN_ATTR_RO(_name); \
808do { \
809 static struct target_core_dev_wwn_attribute \
810 target_core_dev_wwn_##_name = \
811 __CONFIGFS_EATTR_RO(_name, \
812 target_core_dev_wwn_show_attr_##_name); \
813} while (0);
814
815/*
816 * VPD page 0x80 Unit serial
817 */
818static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
819 struct t10_wwn *t10_wwn,
820 char *page)
821{
822 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
823 struct se_device *dev;
824
825 dev = se_dev->se_dev_ptr;
826 if (!(dev))
827 return -ENODEV;
828
829 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
830 &t10_wwn->unit_serial[0]);
831}
832
833static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
834 struct t10_wwn *t10_wwn,
835 const char *page,
836 size_t count)
837{
838 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
839 struct se_device *dev;
840 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
841
842 /*
843 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
844 * from the struct scsi_device level firmware, do not allow
845 * VPD Unit Serial to be emulated.
846 *
847 * Note this struct scsi_device could also be emulating VPD
848 * information from its drivers/scsi LLD. But for now we assume
849 * it is doing 'the right thing' wrt a world wide unique
850 * VPD Unit Serial Number that OS dependent multipath can depend on.
851 */
852 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
853 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
854 " Unit Serial, ignoring request\n");
855 return -EOPNOTSUPP;
856 }
857
858 if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
859 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
860 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
861 return -EOVERFLOW;
862 }
863 /*
864 * Check to see if any active $FABRIC_MOD exports exist. If they
865 * do exist, fail here as changing this information on the fly
866 * (underneath the initiator side OS dependent multipath code)
867 * could cause negative effects.
868 */
869 dev = su_dev->se_dev_ptr;
870 if ((dev)) {
871 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
872 printk(KERN_ERR "Unable to set VPD Unit Serial while"
873 " active %d $FABRIC_MOD exports exist\n",
874 atomic_read(&dev->dev_export_obj.obj_access_count));
875 return -EINVAL;
876 }
877 }
878 /*
879 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
880 *
881 * Also, strip any newline added from the userspace
882 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
883 */
884 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
885 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
886 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
887 "%s", strstrip(buf));
888 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
889
890 printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
891 " %s\n", su_dev->t10_wwn.unit_serial);
892
893 return count;
894}
895
896SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
897
898/*
899 * VPD page 0x83 Protocol Identifier
900 */
901static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
902 struct t10_wwn *t10_wwn,
903 char *page)
904{
905 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
906 struct se_device *dev;
907 struct t10_vpd *vpd;
908 unsigned char buf[VPD_TMP_BUF_SIZE];
909 ssize_t len = 0;
910
911 dev = se_dev->se_dev_ptr;
912 if (!(dev))
913 return -ENODEV;
914
915 memset(buf, 0, VPD_TMP_BUF_SIZE);
916
917 spin_lock(&t10_wwn->t10_vpd_lock);
918 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
919 if (!(vpd->protocol_identifier_set))
920 continue;
921
922 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
923
924 if ((len + strlen(buf) > PAGE_SIZE))
925 break;
926
927 len += sprintf(page+len, "%s", buf);
928 }
929 spin_unlock(&t10_wwn->t10_vpd_lock);
930
931 return len;
932}
933
934static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
935 struct t10_wwn *t10_wwn,
936 const char *page,
937 size_t count)
938{
939 return -ENOSYS;
940}
941
942SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
943
944/*
945 * Generic wrapper for dumping VPD identifiers by association.
946 */
947#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
948static ssize_t target_core_dev_wwn_show_attr_##_name( \
949 struct t10_wwn *t10_wwn, \
950 char *page) \
951{ \
952 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
953 struct se_device *dev; \
954 struct t10_vpd *vpd; \
955 unsigned char buf[VPD_TMP_BUF_SIZE]; \
956 ssize_t len = 0; \
957 \
958 dev = se_dev->se_dev_ptr; \
959 if (!(dev)) \
960 return -ENODEV; \
961 \
962 spin_lock(&t10_wwn->t10_vpd_lock); \
963 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
964 if (vpd->association != _assoc) \
965 continue; \
966 \
967 memset(buf, 0, VPD_TMP_BUF_SIZE); \
968 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
969 if ((len + strlen(buf) > PAGE_SIZE)) \
970 break; \
971 len += sprintf(page+len, "%s", buf); \
972 \
973 memset(buf, 0, VPD_TMP_BUF_SIZE); \
974 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
975 if ((len + strlen(buf) > PAGE_SIZE)) \
976 break; \
977 len += sprintf(page+len, "%s", buf); \
978 \
979 memset(buf, 0, VPD_TMP_BUF_SIZE); \
980 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
981 if ((len + strlen(buf) > PAGE_SIZE)) \
982 break; \
983 len += sprintf(page+len, "%s", buf); \
984 } \
985 spin_unlock(&t10_wwn->t10_vpd_lock); \
986 \
987 return len; \
988}
989
990/*
991 * VPD page 0x83 Assoication: Logical Unit
992 */
993DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
994
995static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
996 struct t10_wwn *t10_wwn,
997 const char *page,
998 size_t count)
999{
1000 return -ENOSYS;
1001}
1002
1003SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1004
1005/*
1006 * VPD page 0x83 Association: Target Port
1007 */
1008DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1009
1010static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1011 struct t10_wwn *t10_wwn,
1012 const char *page,
1013 size_t count)
1014{
1015 return -ENOSYS;
1016}
1017
1018SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1019
1020/*
1021 * VPD page 0x83 Association: SCSI Target Device
1022 */
1023DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1024
1025static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1026 struct t10_wwn *t10_wwn,
1027 const char *page,
1028 size_t count)
1029{
1030 return -ENOSYS;
1031}
1032
1033SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1034
1035CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1036
1037static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1038 &target_core_dev_wwn_vpd_unit_serial.attr,
1039 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1040 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1041 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1042 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1043 NULL,
1044};
1045
1046static struct configfs_item_operations target_core_dev_wwn_ops = {
1047 .show_attribute = target_core_dev_wwn_attr_show,
1048 .store_attribute = target_core_dev_wwn_attr_store,
1049};
1050
1051static struct config_item_type target_core_dev_wwn_cit = {
1052 .ct_item_ops = &target_core_dev_wwn_ops,
1053 .ct_attrs = target_core_dev_wwn_attrs,
1054 .ct_owner = THIS_MODULE,
1055};
1056
1057/* End functions for struct config_item_type target_core_dev_wwn_cit */
1058
1059/* Start functions for struct config_item_type target_core_dev_pr_cit */
1060
1061CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1062#define SE_DEV_PR_ATTR(_name, _mode) \
1063static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1064 __CONFIGFS_EATTR(_name, _mode, \
1065 target_core_dev_pr_show_attr_##_name, \
1066 target_core_dev_pr_store_attr_##_name);
1067
1068#define SE_DEV_PR_ATTR_RO(_name); \
1069static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1070 __CONFIGFS_EATTR_RO(_name, \
1071 target_core_dev_pr_show_attr_##_name);
1072
1073/*
1074 * res_holder
1075 */
1076static ssize_t target_core_dev_pr_show_spc3_res(
1077 struct se_device *dev,
1078 char *page,
1079 ssize_t *len)
1080{
1081 struct se_node_acl *se_nacl;
1082 struct t10_pr_registration *pr_reg;
1083 char i_buf[PR_REG_ISID_ID_LEN];
1084 int prf_isid;
1085
1086 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1087
1088 spin_lock(&dev->dev_reservation_lock);
1089 pr_reg = dev->dev_pr_res_holder;
1090 if (!(pr_reg)) {
1091 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1092 spin_unlock(&dev->dev_reservation_lock);
1093 return *len;
1094 }
1095 se_nacl = pr_reg->pr_reg_nacl;
1096 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1097 PR_REG_ISID_ID_LEN);
1098
1099 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1100 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1101 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1102 spin_unlock(&dev->dev_reservation_lock);
1103
1104 return *len;
1105}
1106
1107static ssize_t target_core_dev_pr_show_spc2_res(
1108 struct se_device *dev,
1109 char *page,
1110 ssize_t *len)
1111{
1112 struct se_node_acl *se_nacl;
1113
1114 spin_lock(&dev->dev_reservation_lock);
1115 se_nacl = dev->dev_reserved_node_acl;
1116 if (!(se_nacl)) {
1117 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1118 spin_unlock(&dev->dev_reservation_lock);
1119 return *len;
1120 }
1121 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1122 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1123 se_nacl->initiatorname);
1124 spin_unlock(&dev->dev_reservation_lock);
1125
1126 return *len;
1127}
1128
1129static ssize_t target_core_dev_pr_show_attr_res_holder(
1130 struct se_subsystem_dev *su_dev,
1131 char *page)
1132{
1133 ssize_t len = 0;
1134
1135 if (!(su_dev->se_dev_ptr))
1136 return -ENODEV;
1137
1138 switch (T10_RES(su_dev)->res_type) {
1139 case SPC3_PERSISTENT_RESERVATIONS:
1140 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1141 page, &len);
1142 break;
1143 case SPC2_RESERVATIONS:
1144 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1145 page, &len);
1146 break;
1147 case SPC_PASSTHROUGH:
1148 len += sprintf(page+len, "Passthrough\n");
1149 break;
1150 default:
1151 len += sprintf(page+len, "Unknown\n");
1152 break;
1153 }
1154
1155 return len;
1156}
1157
1158SE_DEV_PR_ATTR_RO(res_holder);
1159
1160/*
1161 * res_pr_all_tgt_pts
1162 */
1163static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1164 struct se_subsystem_dev *su_dev,
1165 char *page)
1166{
1167 struct se_device *dev;
1168 struct t10_pr_registration *pr_reg;
1169 ssize_t len = 0;
1170
1171 dev = su_dev->se_dev_ptr;
1172 if (!(dev))
1173 return -ENODEV;
1174
1175 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1176 return len;
1177
1178 spin_lock(&dev->dev_reservation_lock);
1179 pr_reg = dev->dev_pr_res_holder;
1180 if (!(pr_reg)) {
1181 len = sprintf(page, "No SPC-3 Reservation holder\n");
1182 spin_unlock(&dev->dev_reservation_lock);
1183 return len;
1184 }
1185 /*
1186 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1187 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1188 */
1189 if (pr_reg->pr_reg_all_tg_pt)
1190 len = sprintf(page, "SPC-3 Reservation: All Target"
1191 " Ports registration\n");
1192 else
1193 len = sprintf(page, "SPC-3 Reservation: Single"
1194 " Target Port registration\n");
1195 spin_unlock(&dev->dev_reservation_lock);
1196
1197 return len;
1198}
1199
1200SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1201
1202/*
1203 * res_pr_generation
1204 */
1205static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1206 struct se_subsystem_dev *su_dev,
1207 char *page)
1208{
1209 if (!(su_dev->se_dev_ptr))
1210 return -ENODEV;
1211
1212 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1213 return 0;
1214
1215 return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1216}
1217
1218SE_DEV_PR_ATTR_RO(res_pr_generation);
1219
1220/*
1221 * res_pr_holder_tg_port
1222 */
1223static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1224 struct se_subsystem_dev *su_dev,
1225 char *page)
1226{
1227 struct se_device *dev;
1228 struct se_node_acl *se_nacl;
1229 struct se_lun *lun;
1230 struct se_portal_group *se_tpg;
1231 struct t10_pr_registration *pr_reg;
1232 struct target_core_fabric_ops *tfo;
1233 ssize_t len = 0;
1234
1235 dev = su_dev->se_dev_ptr;
1236 if (!(dev))
1237 return -ENODEV;
1238
1239 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1240 return len;
1241
1242 spin_lock(&dev->dev_reservation_lock);
1243 pr_reg = dev->dev_pr_res_holder;
1244 if (!(pr_reg)) {
1245 len = sprintf(page, "No SPC-3 Reservation holder\n");
1246 spin_unlock(&dev->dev_reservation_lock);
1247 return len;
1248 }
1249 se_nacl = pr_reg->pr_reg_nacl;
1250 se_tpg = se_nacl->se_tpg;
1251 lun = pr_reg->pr_reg_tg_pt_lun;
1252 tfo = TPG_TFO(se_tpg);
1253
1254 len += sprintf(page+len, "SPC-3 Reservation: %s"
1255 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1256 tfo->tpg_get_wwn(se_tpg));
1257 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1258 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1259 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1260 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1261 tfo->get_fabric_name(), lun->unpacked_lun);
1262 spin_unlock(&dev->dev_reservation_lock);
1263
1264 return len;
1265}
1266
1267SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1268
1269/*
1270 * res_pr_registered_i_pts
1271 */
1272static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1273 struct se_subsystem_dev *su_dev,
1274 char *page)
1275{
1276 struct target_core_fabric_ops *tfo;
1277 struct t10_pr_registration *pr_reg;
1278 unsigned char buf[384];
1279 char i_buf[PR_REG_ISID_ID_LEN];
1280 ssize_t len = 0;
1281 int reg_count = 0, prf_isid;
1282
1283 if (!(su_dev->se_dev_ptr))
1284 return -ENODEV;
1285
1286 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1287 return len;
1288
1289 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1290
1291 spin_lock(&T10_RES(su_dev)->registration_lock);
1292 list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1293 pr_reg_list) {
1294
1295 memset(buf, 0, 384);
1296 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1297 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1298 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1299 PR_REG_ISID_ID_LEN);
1300 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1301 tfo->get_fabric_name(),
1302 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1303 &i_buf[0] : "", pr_reg->pr_res_key,
1304 pr_reg->pr_res_generation);
1305
1306 if ((len + strlen(buf) > PAGE_SIZE))
1307 break;
1308
1309 len += sprintf(page+len, "%s", buf);
1310 reg_count++;
1311 }
1312 spin_unlock(&T10_RES(su_dev)->registration_lock);
1313
1314 if (!(reg_count))
1315 len += sprintf(page+len, "None\n");
1316
1317 return len;
1318}
1319
1320SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1321
1322/*
1323 * res_pr_type
1324 */
1325static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1326 struct se_subsystem_dev *su_dev,
1327 char *page)
1328{
1329 struct se_device *dev;
1330 struct t10_pr_registration *pr_reg;
1331 ssize_t len = 0;
1332
1333 dev = su_dev->se_dev_ptr;
1334 if (!(dev))
1335 return -ENODEV;
1336
1337 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1338 return len;
1339
1340 spin_lock(&dev->dev_reservation_lock);
1341 pr_reg = dev->dev_pr_res_holder;
1342 if (!(pr_reg)) {
1343 len = sprintf(page, "No SPC-3 Reservation holder\n");
1344 spin_unlock(&dev->dev_reservation_lock);
1345 return len;
1346 }
1347 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1348 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1349 spin_unlock(&dev->dev_reservation_lock);
1350
1351 return len;
1352}
1353
1354SE_DEV_PR_ATTR_RO(res_pr_type);
1355
1356/*
1357 * res_type
1358 */
1359static ssize_t target_core_dev_pr_show_attr_res_type(
1360 struct se_subsystem_dev *su_dev,
1361 char *page)
1362{
1363 ssize_t len = 0;
1364
1365 if (!(su_dev->se_dev_ptr))
1366 return -ENODEV;
1367
1368 switch (T10_RES(su_dev)->res_type) {
1369 case SPC3_PERSISTENT_RESERVATIONS:
1370 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1371 break;
1372 case SPC2_RESERVATIONS:
1373 len = sprintf(page, "SPC2_RESERVATIONS\n");
1374 break;
1375 case SPC_PASSTHROUGH:
1376 len = sprintf(page, "SPC_PASSTHROUGH\n");
1377 break;
1378 default:
1379 len = sprintf(page, "UNKNOWN\n");
1380 break;
1381 }
1382
1383 return len;
1384}
1385
1386SE_DEV_PR_ATTR_RO(res_type);
1387
1388/*
1389 * res_aptpl_active
1390 */
1391
1392static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1393 struct se_subsystem_dev *su_dev,
1394 char *page)
1395{
1396 if (!(su_dev->se_dev_ptr))
1397 return -ENODEV;
1398
1399 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1400 return 0;
1401
1402 return sprintf(page, "APTPL Bit Status: %s\n",
1403 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1404}
1405
1406SE_DEV_PR_ATTR_RO(res_aptpl_active);
1407
1408/*
1409 * res_aptpl_metadata
1410 */
1411static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1412 struct se_subsystem_dev *su_dev,
1413 char *page)
1414{
1415 if (!(su_dev->se_dev_ptr))
1416 return -ENODEV;
1417
1418 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1419 return 0;
1420
1421 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1422}
1423
1424enum {
1425 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1426 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1427 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1428 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1429};
1430
1431static match_table_t tokens = {
1432 {Opt_initiator_fabric, "initiator_fabric=%s"},
1433 {Opt_initiator_node, "initiator_node=%s"},
1434 {Opt_initiator_sid, "initiator_sid=%s"},
1435 {Opt_sa_res_key, "sa_res_key=%s"},
1436 {Opt_res_holder, "res_holder=%d"},
1437 {Opt_res_type, "res_type=%d"},
1438 {Opt_res_scope, "res_scope=%d"},
1439 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1440 {Opt_mapped_lun, "mapped_lun=%d"},
1441 {Opt_target_fabric, "target_fabric=%s"},
1442 {Opt_target_node, "target_node=%s"},
1443 {Opt_tpgt, "tpgt=%d"},
1444 {Opt_port_rtpi, "port_rtpi=%d"},
1445 {Opt_target_lun, "target_lun=%d"},
1446 {Opt_err, NULL}
1447};
1448
1449static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1450 struct se_subsystem_dev *su_dev,
1451 const char *page,
1452 size_t count)
1453{
1454 struct se_device *dev;
1455 unsigned char *i_fabric, *t_fabric, *i_port = NULL, *t_port = NULL;
1456 unsigned char *isid = NULL;
1457 char *orig, *ptr, *arg_p, *opts;
1458 substring_t args[MAX_OPT_ARGS];
1459 unsigned long long tmp_ll;
1460 u64 sa_res_key = 0;
1461 u32 mapped_lun = 0, target_lun = 0;
1462 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1463 u16 port_rpti = 0, tpgt = 0;
1464 u8 type = 0, scope;
1465
1466 dev = su_dev->se_dev_ptr;
1467 if (!(dev))
1468 return -ENODEV;
1469
1470 if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1471 return 0;
1472
1473 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1474 printk(KERN_INFO "Unable to process APTPL metadata while"
1475 " active fabric exports exist\n");
1476 return -EINVAL;
1477 }
1478
1479 opts = kstrdup(page, GFP_KERNEL);
1480 if (!opts)
1481 return -ENOMEM;
1482
1483 orig = opts;
1484 while ((ptr = strsep(&opts, ",")) != NULL) {
1485 if (!*ptr)
1486 continue;
1487
1488 token = match_token(ptr, tokens, args);
1489 switch (token) {
1490 case Opt_initiator_fabric:
1491 i_fabric = match_strdup(&args[0]);
1492 break;
1493 case Opt_initiator_node:
1494 i_port = match_strdup(&args[0]);
1495 if (strlen(i_port) > PR_APTPL_MAX_IPORT_LEN) {
1496 printk(KERN_ERR "APTPL metadata initiator_node="
1497 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1498 PR_APTPL_MAX_IPORT_LEN);
1499 ret = -EINVAL;
1500 break;
1501 }
1502 break;
1503 case Opt_initiator_sid:
1504 isid = match_strdup(&args[0]);
1505 if (strlen(isid) > PR_REG_ISID_LEN) {
1506 printk(KERN_ERR "APTPL metadata initiator_isid"
1507 "= exceeds PR_REG_ISID_LEN: %d\n",
1508 PR_REG_ISID_LEN);
1509 ret = -EINVAL;
1510 break;
1511 }
1512 break;
1513 case Opt_sa_res_key:
1514 arg_p = match_strdup(&args[0]);
1515 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1516 if (ret < 0) {
1517 printk(KERN_ERR "strict_strtoull() failed for"
1518 " sa_res_key=\n");
1519 goto out;
1520 }
1521 sa_res_key = (u64)tmp_ll;
1522 break;
1523 /*
1524 * PR APTPL Metadata for Reservation
1525 */
1526 case Opt_res_holder:
1527 match_int(args, &arg);
1528 res_holder = arg;
1529 break;
1530 case Opt_res_type:
1531 match_int(args, &arg);
1532 type = (u8)arg;
1533 break;
1534 case Opt_res_scope:
1535 match_int(args, &arg);
1536 scope = (u8)arg;
1537 break;
1538 case Opt_res_all_tg_pt:
1539 match_int(args, &arg);
1540 all_tg_pt = (int)arg;
1541 break;
1542 case Opt_mapped_lun:
1543 match_int(args, &arg);
1544 mapped_lun = (u32)arg;
1545 break;
1546 /*
1547 * PR APTPL Metadata for Target Port
1548 */
1549 case Opt_target_fabric:
1550 t_fabric = match_strdup(&args[0]);
1551 break;
1552 case Opt_target_node:
1553 t_port = match_strdup(&args[0]);
1554 if (strlen(t_port) > PR_APTPL_MAX_TPORT_LEN) {
1555 printk(KERN_ERR "APTPL metadata target_node="
1556 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1557 PR_APTPL_MAX_TPORT_LEN);
1558 ret = -EINVAL;
1559 break;
1560 }
1561 break;
1562 case Opt_tpgt:
1563 match_int(args, &arg);
1564 tpgt = (u16)arg;
1565 break;
1566 case Opt_port_rtpi:
1567 match_int(args, &arg);
1568 port_rpti = (u16)arg;
1569 break;
1570 case Opt_target_lun:
1571 match_int(args, &arg);
1572 target_lun = (u32)arg;
1573 break;
1574 default:
1575 break;
1576 }
1577 }
1578
1579 if (!(i_port) || !(t_port) || !(sa_res_key)) {
1580 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1581 ret = -EINVAL;
1582 goto out;
1583 }
1584
1585 if (res_holder && !(type)) {
1586 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1587 " holder\n", type);
1588 ret = -EINVAL;
1589 goto out;
1590 }
1591
1592 ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1593 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1594 res_holder, all_tg_pt, type);
1595out:
1596 kfree(orig);
1597 return (ret == 0) ? count : ret;
1598}
1599
1600SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1601
1602CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1603
1604static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1605 &target_core_dev_pr_res_holder.attr,
1606 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1607 &target_core_dev_pr_res_pr_generation.attr,
1608 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1609 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1610 &target_core_dev_pr_res_pr_type.attr,
1611 &target_core_dev_pr_res_type.attr,
1612 &target_core_dev_pr_res_aptpl_active.attr,
1613 &target_core_dev_pr_res_aptpl_metadata.attr,
1614 NULL,
1615};
1616
1617static struct configfs_item_operations target_core_dev_pr_ops = {
1618 .show_attribute = target_core_dev_pr_attr_show,
1619 .store_attribute = target_core_dev_pr_attr_store,
1620};
1621
1622static struct config_item_type target_core_dev_pr_cit = {
1623 .ct_item_ops = &target_core_dev_pr_ops,
1624 .ct_attrs = target_core_dev_pr_attrs,
1625 .ct_owner = THIS_MODULE,
1626};
1627
1628/* End functions for struct config_item_type target_core_dev_pr_cit */
1629
1630/* Start functions for struct config_item_type target_core_dev_cit */
1631
1632static ssize_t target_core_show_dev_info(void *p, char *page)
1633{
1634 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1635 struct se_hba *hba = se_dev->se_dev_hba;
1636 struct se_subsystem_api *t = hba->transport;
1637 int bl = 0;
1638 ssize_t read_bytes = 0;
1639
1640 if (!(se_dev->se_dev_ptr))
1641 return -ENODEV;
1642
1643 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1644 read_bytes += bl;
1645 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1646 return read_bytes;
1647}
1648
1649static struct target_core_configfs_attribute target_core_attr_dev_info = {
1650 .attr = { .ca_owner = THIS_MODULE,
1651 .ca_name = "info",
1652 .ca_mode = S_IRUGO },
1653 .show = target_core_show_dev_info,
1654 .store = NULL,
1655};
1656
1657static ssize_t target_core_store_dev_control(
1658 void *p,
1659 const char *page,
1660 size_t count)
1661{
1662 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1663 struct se_hba *hba = se_dev->se_dev_hba;
1664 struct se_subsystem_api *t = hba->transport;
1665
1666 if (!(se_dev->se_dev_su_ptr)) {
1667 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1668 "_dev_su_ptr\n");
1669 return -EINVAL;
1670 }
1671
1672 return t->set_configfs_dev_params(hba, se_dev, page, count);
1673}
1674
1675static struct target_core_configfs_attribute target_core_attr_dev_control = {
1676 .attr = { .ca_owner = THIS_MODULE,
1677 .ca_name = "control",
1678 .ca_mode = S_IWUSR },
1679 .show = NULL,
1680 .store = target_core_store_dev_control,
1681};
1682
1683static ssize_t target_core_show_dev_alias(void *p, char *page)
1684{
1685 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1686
1687 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1688 return 0;
1689
1690 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1691}
1692
1693static ssize_t target_core_store_dev_alias(
1694 void *p,
1695 const char *page,
1696 size_t count)
1697{
1698 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1699 struct se_hba *hba = se_dev->se_dev_hba;
1700 ssize_t read_bytes;
1701
1702 if (count > (SE_DEV_ALIAS_LEN-1)) {
1703 printk(KERN_ERR "alias count: %d exceeds"
1704 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1705 SE_DEV_ALIAS_LEN-1);
1706 return -EINVAL;
1707 }
1708
1709 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1710 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1711 "%s", page);
1712
1713 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1714 config_item_name(&hba->hba_group.cg_item),
1715 config_item_name(&se_dev->se_dev_group.cg_item),
1716 se_dev->se_dev_alias);
1717
1718 return read_bytes;
1719}
1720
1721static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1722 .attr = { .ca_owner = THIS_MODULE,
1723 .ca_name = "alias",
1724 .ca_mode = S_IRUGO | S_IWUSR },
1725 .show = target_core_show_dev_alias,
1726 .store = target_core_store_dev_alias,
1727};
1728
1729static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1730{
1731 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1732
1733 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1734 return 0;
1735
1736 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1737}
1738
1739static ssize_t target_core_store_dev_udev_path(
1740 void *p,
1741 const char *page,
1742 size_t count)
1743{
1744 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1745 struct se_hba *hba = se_dev->se_dev_hba;
1746 ssize_t read_bytes;
1747
1748 if (count > (SE_UDEV_PATH_LEN-1)) {
1749 printk(KERN_ERR "udev_path count: %d exceeds"
1750 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1751 SE_UDEV_PATH_LEN-1);
1752 return -EINVAL;
1753 }
1754
1755 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1756 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1757 "%s", page);
1758
1759 printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1760 config_item_name(&hba->hba_group.cg_item),
1761 config_item_name(&se_dev->se_dev_group.cg_item),
1762 se_dev->se_dev_udev_path);
1763
1764 return read_bytes;
1765}
1766
1767static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1768 .attr = { .ca_owner = THIS_MODULE,
1769 .ca_name = "udev_path",
1770 .ca_mode = S_IRUGO | S_IWUSR },
1771 .show = target_core_show_dev_udev_path,
1772 .store = target_core_store_dev_udev_path,
1773};
1774
1775static ssize_t target_core_store_dev_enable(
1776 void *p,
1777 const char *page,
1778 size_t count)
1779{
1780 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1781 struct se_device *dev;
1782 struct se_hba *hba = se_dev->se_dev_hba;
1783 struct se_subsystem_api *t = hba->transport;
1784 char *ptr;
1785
1786 ptr = strstr(page, "1");
1787 if (!(ptr)) {
1788 printk(KERN_ERR "For dev_enable ops, only valid value"
1789 " is \"1\"\n");
1790 return -EINVAL;
1791 }
1792 if ((se_dev->se_dev_ptr)) {
1793 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1794 " object\n");
1795 return -EEXIST;
1796 }
1797
1798 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1799 return -EINVAL;
1800
1801 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1802 if (!(dev) || IS_ERR(dev))
1803 return -EINVAL;
1804
1805 se_dev->se_dev_ptr = dev;
1806 printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1807 " %p\n", se_dev->se_dev_ptr);
1808
1809 return count;
1810}
1811
1812static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1813 .attr = { .ca_owner = THIS_MODULE,
1814 .ca_name = "enable",
1815 .ca_mode = S_IWUSR },
1816 .show = NULL,
1817 .store = target_core_store_dev_enable,
1818};
1819
1820static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1821{
1822 struct se_device *dev;
1823 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1824 struct config_item *lu_ci;
1825 struct t10_alua_lu_gp *lu_gp;
1826 struct t10_alua_lu_gp_member *lu_gp_mem;
1827 ssize_t len = 0;
1828
1829 dev = su_dev->se_dev_ptr;
1830 if (!(dev))
1831 return -ENODEV;
1832
1833 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1834 return len;
1835
1836 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1837 if (!(lu_gp_mem)) {
1838 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1839 " pointer\n");
1840 return -EINVAL;
1841 }
1842
1843 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1844 lu_gp = lu_gp_mem->lu_gp;
1845 if ((lu_gp)) {
1846 lu_ci = &lu_gp->lu_gp_group.cg_item;
1847 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1848 config_item_name(lu_ci), lu_gp->lu_gp_id);
1849 }
1850 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1851
1852 return len;
1853}
1854
1855static ssize_t target_core_store_alua_lu_gp(
1856 void *p,
1857 const char *page,
1858 size_t count)
1859{
1860 struct se_device *dev;
1861 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1862 struct se_hba *hba = su_dev->se_dev_hba;
1863 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1864 struct t10_alua_lu_gp_member *lu_gp_mem;
1865 unsigned char buf[LU_GROUP_NAME_BUF];
1866 int move = 0;
1867
1868 dev = su_dev->se_dev_ptr;
1869 if (!(dev))
1870 return -ENODEV;
1871
1872 if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1873 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1874 config_item_name(&hba->hba_group.cg_item),
1875 config_item_name(&su_dev->se_dev_group.cg_item));
1876 return -EINVAL;
1877 }
1878 if (count > LU_GROUP_NAME_BUF) {
1879 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1880 return -EINVAL;
1881 }
1882 memset(buf, 0, LU_GROUP_NAME_BUF);
1883 memcpy(buf, page, count);
1884 /*
1885 * Any ALUA logical unit alias besides "NULL" means we will be
1886 * making a new group association.
1887 */
1888 if (strcmp(strstrip(buf), "NULL")) {
1889 /*
1890 * core_alua_get_lu_gp_by_name() will increment reference to
1891 * struct t10_alua_lu_gp. This reference is released with
1892 * core_alua_get_lu_gp_by_name below().
1893 */
1894 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1895 if (!(lu_gp_new))
1896 return -ENODEV;
1897 }
1898 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1899 if (!(lu_gp_mem)) {
1900 if (lu_gp_new)
1901 core_alua_put_lu_gp_from_name(lu_gp_new);
1902 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1903 " pointer\n");
1904 return -EINVAL;
1905 }
1906
1907 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1908 lu_gp = lu_gp_mem->lu_gp;
1909 if ((lu_gp)) {
1910 /*
1911 * Clearing an existing lu_gp association, and replacing
1912 * with NULL
1913 */
1914 if (!(lu_gp_new)) {
1915 printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1916 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1917 " %hu\n",
1918 config_item_name(&hba->hba_group.cg_item),
1919 config_item_name(&su_dev->se_dev_group.cg_item),
1920 config_item_name(&lu_gp->lu_gp_group.cg_item),
1921 lu_gp->lu_gp_id);
1922
1923 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1924 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1925
1926 return count;
1927 }
1928 /*
1929 * Removing existing association of lu_gp_mem with lu_gp
1930 */
1931 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1932 move = 1;
1933 }
1934 /*
1935 * Associate lu_gp_mem with lu_gp_new.
1936 */
1937 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1938 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1939
1940 printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1941 " core/alua/lu_gps/%s, ID: %hu\n",
1942 (move) ? "Moving" : "Adding",
1943 config_item_name(&hba->hba_group.cg_item),
1944 config_item_name(&su_dev->se_dev_group.cg_item),
1945 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1946 lu_gp_new->lu_gp_id);
1947
1948 core_alua_put_lu_gp_from_name(lu_gp_new);
1949 return count;
1950}
1951
1952static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1953 .attr = { .ca_owner = THIS_MODULE,
1954 .ca_name = "alua_lu_gp",
1955 .ca_mode = S_IRUGO | S_IWUSR },
1956 .show = target_core_show_alua_lu_gp,
1957 .store = target_core_store_alua_lu_gp,
1958};
1959
1960static struct configfs_attribute *lio_core_dev_attrs[] = {
1961 &target_core_attr_dev_info.attr,
1962 &target_core_attr_dev_control.attr,
1963 &target_core_attr_dev_alias.attr,
1964 &target_core_attr_dev_udev_path.attr,
1965 &target_core_attr_dev_enable.attr,
1966 &target_core_attr_dev_alua_lu_gp.attr,
1967 NULL,
1968};
1969
1970static void target_core_dev_release(struct config_item *item)
1971{
1972 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1973 struct se_subsystem_dev, se_dev_group);
1974 struct config_group *dev_cg;
1975
1976 if (!(se_dev))
1977 return;
1978
1979 dev_cg = &se_dev->se_dev_group;
1980 kfree(dev_cg->default_groups);
1981}
1982
1983static ssize_t target_core_dev_show(struct config_item *item,
1984 struct configfs_attribute *attr,
1985 char *page)
1986{
1987 struct se_subsystem_dev *se_dev = container_of(
1988 to_config_group(item), struct se_subsystem_dev,
1989 se_dev_group);
1990 struct target_core_configfs_attribute *tc_attr = container_of(
1991 attr, struct target_core_configfs_attribute, attr);
1992
1993 if (!(tc_attr->show))
1994 return -EINVAL;
1995
1996 return tc_attr->show((void *)se_dev, page);
1997}
1998
1999static ssize_t target_core_dev_store(struct config_item *item,
2000 struct configfs_attribute *attr,
2001 const char *page, size_t count)
2002{
2003 struct se_subsystem_dev *se_dev = container_of(
2004 to_config_group(item), struct se_subsystem_dev,
2005 se_dev_group);
2006 struct target_core_configfs_attribute *tc_attr = container_of(
2007 attr, struct target_core_configfs_attribute, attr);
2008
2009 if (!(tc_attr->store))
2010 return -EINVAL;
2011
2012 return tc_attr->store((void *)se_dev, page, count);
2013}
2014
2015static struct configfs_item_operations target_core_dev_item_ops = {
2016 .release = target_core_dev_release,
2017 .show_attribute = target_core_dev_show,
2018 .store_attribute = target_core_dev_store,
2019};
2020
2021static struct config_item_type target_core_dev_cit = {
2022 .ct_item_ops = &target_core_dev_item_ops,
2023 .ct_attrs = lio_core_dev_attrs,
2024 .ct_owner = THIS_MODULE,
2025};
2026
2027/* End functions for struct config_item_type target_core_dev_cit */
2028
2029/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2030
2031CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2032#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2033static struct target_core_alua_lu_gp_attribute \
2034 target_core_alua_lu_gp_##_name = \
2035 __CONFIGFS_EATTR(_name, _mode, \
2036 target_core_alua_lu_gp_show_attr_##_name, \
2037 target_core_alua_lu_gp_store_attr_##_name);
2038
2039#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2040static struct target_core_alua_lu_gp_attribute \
2041 target_core_alua_lu_gp_##_name = \
2042 __CONFIGFS_EATTR_RO(_name, \
2043 target_core_alua_lu_gp_show_attr_##_name);
2044
2045/*
2046 * lu_gp_id
2047 */
2048static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2049 struct t10_alua_lu_gp *lu_gp,
2050 char *page)
2051{
2052 if (!(lu_gp->lu_gp_valid_id))
2053 return 0;
2054
2055 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2056}
2057
2058static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2059 struct t10_alua_lu_gp *lu_gp,
2060 const char *page,
2061 size_t count)
2062{
2063 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2064 unsigned long lu_gp_id;
2065 int ret;
2066
2067 ret = strict_strtoul(page, 0, &lu_gp_id);
2068 if (ret < 0) {
2069 printk(KERN_ERR "strict_strtoul() returned %d for"
2070 " lu_gp_id\n", ret);
2071 return -EINVAL;
2072 }
2073 if (lu_gp_id > 0x0000ffff) {
2074 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2075 " 0x0000ffff\n", lu_gp_id);
2076 return -EINVAL;
2077 }
2078
2079 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2080 if (ret < 0)
2081 return -EINVAL;
2082
2083 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2084 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2085 config_item_name(&alua_lu_gp_cg->cg_item),
2086 lu_gp->lu_gp_id);
2087
2088 return count;
2089}
2090
2091SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2092
2093/*
2094 * members
2095 */
2096static ssize_t target_core_alua_lu_gp_show_attr_members(
2097 struct t10_alua_lu_gp *lu_gp,
2098 char *page)
2099{
2100 struct se_device *dev;
2101 struct se_hba *hba;
2102 struct se_subsystem_dev *su_dev;
2103 struct t10_alua_lu_gp_member *lu_gp_mem;
2104 ssize_t len = 0, cur_len;
2105 unsigned char buf[LU_GROUP_NAME_BUF];
2106
2107 memset(buf, 0, LU_GROUP_NAME_BUF);
2108
2109 spin_lock(&lu_gp->lu_gp_lock);
2110 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2111 dev = lu_gp_mem->lu_gp_mem_dev;
2112 su_dev = dev->se_sub_dev;
2113 hba = su_dev->se_dev_hba;
2114
2115 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2116 config_item_name(&hba->hba_group.cg_item),
2117 config_item_name(&su_dev->se_dev_group.cg_item));
2118 cur_len++; /* Extra byte for NULL terminator */
2119
2120 if ((cur_len + len) > PAGE_SIZE) {
2121 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2122 "_members buffer\n");
2123 break;
2124 }
2125 memcpy(page+len, buf, cur_len);
2126 len += cur_len;
2127 }
2128 spin_unlock(&lu_gp->lu_gp_lock);
2129
2130 return len;
2131}
2132
2133SE_DEV_ALUA_LU_ATTR_RO(members);
2134
2135CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2136
2137static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2138 &target_core_alua_lu_gp_lu_gp_id.attr,
2139 &target_core_alua_lu_gp_members.attr,
2140 NULL,
2141};
2142
2143static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2144 .show_attribute = target_core_alua_lu_gp_attr_show,
2145 .store_attribute = target_core_alua_lu_gp_attr_store,
2146};
2147
2148static struct config_item_type target_core_alua_lu_gp_cit = {
2149 .ct_item_ops = &target_core_alua_lu_gp_ops,
2150 .ct_attrs = target_core_alua_lu_gp_attrs,
2151 .ct_owner = THIS_MODULE,
2152};
2153
2154/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2155
2156/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2157
2158static struct config_group *target_core_alua_create_lu_gp(
2159 struct config_group *group,
2160 const char *name)
2161{
2162 struct t10_alua_lu_gp *lu_gp;
2163 struct config_group *alua_lu_gp_cg = NULL;
2164 struct config_item *alua_lu_gp_ci = NULL;
2165
2166 lu_gp = core_alua_allocate_lu_gp(name, 0);
2167 if (IS_ERR(lu_gp))
2168 return NULL;
2169
2170 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2171 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2172
2173 config_group_init_type_name(alua_lu_gp_cg, name,
2174 &target_core_alua_lu_gp_cit);
2175
2176 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2177 " Group: core/alua/lu_gps/%s\n",
2178 config_item_name(alua_lu_gp_ci));
2179
2180 return alua_lu_gp_cg;
2181
2182}
2183
2184static void target_core_alua_drop_lu_gp(
2185 struct config_group *group,
2186 struct config_item *item)
2187{
2188 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2189 struct t10_alua_lu_gp, lu_gp_group);
2190
2191 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2192 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2193 config_item_name(item), lu_gp->lu_gp_id);
2194
2195 config_item_put(item);
2196 core_alua_free_lu_gp(lu_gp);
2197}
2198
2199static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2200 .make_group = &target_core_alua_create_lu_gp,
2201 .drop_item = &target_core_alua_drop_lu_gp,
2202};
2203
2204static struct config_item_type target_core_alua_lu_gps_cit = {
2205 .ct_item_ops = NULL,
2206 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2207 .ct_owner = THIS_MODULE,
2208};
2209
2210/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2211
2212/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2213
2214CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2215#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2216static struct target_core_alua_tg_pt_gp_attribute \
2217 target_core_alua_tg_pt_gp_##_name = \
2218 __CONFIGFS_EATTR(_name, _mode, \
2219 target_core_alua_tg_pt_gp_show_attr_##_name, \
2220 target_core_alua_tg_pt_gp_store_attr_##_name);
2221
2222#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2223static struct target_core_alua_tg_pt_gp_attribute \
2224 target_core_alua_tg_pt_gp_##_name = \
2225 __CONFIGFS_EATTR_RO(_name, \
2226 target_core_alua_tg_pt_gp_show_attr_##_name);
2227
2228/*
2229 * alua_access_state
2230 */
2231static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2232 struct t10_alua_tg_pt_gp *tg_pt_gp,
2233 char *page)
2234{
2235 return sprintf(page, "%d\n",
2236 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2237}
2238
2239static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2240 struct t10_alua_tg_pt_gp *tg_pt_gp,
2241 const char *page,
2242 size_t count)
2243{
2244 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2245 unsigned long tmp;
2246 int new_state, ret;
2247
2248 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2249 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2250 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2251 return -EINVAL;
2252 }
2253
2254 ret = strict_strtoul(page, 0, &tmp);
2255 if (ret < 0) {
2256 printk("Unable to extract new ALUA access state from"
2257 " %s\n", page);
2258 return -EINVAL;
2259 }
2260 new_state = (int)tmp;
2261
2262 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2263 printk(KERN_ERR "Unable to process implict configfs ALUA"
2264 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2265 return -EINVAL;
2266 }
2267
2268 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2269 NULL, NULL, new_state, 0);
2270 return (!ret) ? count : -EINVAL;
2271}
2272
2273SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2274
2275/*
2276 * alua_access_status
2277 */
2278static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2279 struct t10_alua_tg_pt_gp *tg_pt_gp,
2280 char *page)
2281{
2282 return sprintf(page, "%s\n",
2283 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2284}
2285
2286static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2287 struct t10_alua_tg_pt_gp *tg_pt_gp,
2288 const char *page,
2289 size_t count)
2290{
2291 unsigned long tmp;
2292 int new_status, ret;
2293
2294 if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2295 printk(KERN_ERR "Unable to do set ALUA access status on non"
2296 " valid tg_pt_gp ID: %hu\n",
2297 tg_pt_gp->tg_pt_gp_valid_id);
2298 return -EINVAL;
2299 }
2300
2301 ret = strict_strtoul(page, 0, &tmp);
2302 if (ret < 0) {
2303 printk(KERN_ERR "Unable to extract new ALUA access status"
2304 " from %s\n", page);
2305 return -EINVAL;
2306 }
2307 new_status = (int)tmp;
2308
2309 if ((new_status != ALUA_STATUS_NONE) &&
2310 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2311 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2312 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2313 new_status);
2314 return -EINVAL;
2315 }
2316
2317 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2318 return count;
2319}
2320
2321SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2322
2323/*
2324 * alua_access_type
2325 */
2326static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2327 struct t10_alua_tg_pt_gp *tg_pt_gp,
2328 char *page)
2329{
2330 return core_alua_show_access_type(tg_pt_gp, page);
2331}
2332
2333static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2334 struct t10_alua_tg_pt_gp *tg_pt_gp,
2335 const char *page,
2336 size_t count)
2337{
2338 return core_alua_store_access_type(tg_pt_gp, page, count);
2339}
2340
2341SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2342
2343/*
2344 * alua_write_metadata
2345 */
2346static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2347 struct t10_alua_tg_pt_gp *tg_pt_gp,
2348 char *page)
2349{
2350 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2351}
2352
2353static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2354 struct t10_alua_tg_pt_gp *tg_pt_gp,
2355 const char *page,
2356 size_t count)
2357{
2358 unsigned long tmp;
2359 int ret;
2360
2361 ret = strict_strtoul(page, 0, &tmp);
2362 if (ret < 0) {
2363 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2364 return -EINVAL;
2365 }
2366
2367 if ((tmp != 0) && (tmp != 1)) {
2368 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2369 " %lu\n", tmp);
2370 return -EINVAL;
2371 }
2372 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2373
2374 return count;
2375}
2376
2377SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2378
2379
2380
2381/*
2382 * nonop_delay_msecs
2383 */
2384static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2385 struct t10_alua_tg_pt_gp *tg_pt_gp,
2386 char *page)
2387{
2388 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2389
2390}
2391
2392static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2393 struct t10_alua_tg_pt_gp *tg_pt_gp,
2394 const char *page,
2395 size_t count)
2396{
2397 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2398}
2399
2400SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2401
2402/*
2403 * trans_delay_msecs
2404 */
2405static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2406 struct t10_alua_tg_pt_gp *tg_pt_gp,
2407 char *page)
2408{
2409 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2410}
2411
2412static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2413 struct t10_alua_tg_pt_gp *tg_pt_gp,
2414 const char *page,
2415 size_t count)
2416{
2417 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2418}
2419
2420SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2421
2422/*
2423 * preferred
2424 */
2425
2426static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2427 struct t10_alua_tg_pt_gp *tg_pt_gp,
2428 char *page)
2429{
2430 return core_alua_show_preferred_bit(tg_pt_gp, page);
2431}
2432
2433static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2434 struct t10_alua_tg_pt_gp *tg_pt_gp,
2435 const char *page,
2436 size_t count)
2437{
2438 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2439}
2440
2441SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2442
2443/*
2444 * tg_pt_gp_id
2445 */
2446static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2447 struct t10_alua_tg_pt_gp *tg_pt_gp,
2448 char *page)
2449{
2450 if (!(tg_pt_gp->tg_pt_gp_valid_id))
2451 return 0;
2452
2453 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2454}
2455
2456static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2457 struct t10_alua_tg_pt_gp *tg_pt_gp,
2458 const char *page,
2459 size_t count)
2460{
2461 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2462 unsigned long tg_pt_gp_id;
2463 int ret;
2464
2465 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2466 if (ret < 0) {
2467 printk(KERN_ERR "strict_strtoul() returned %d for"
2468 " tg_pt_gp_id\n", ret);
2469 return -EINVAL;
2470 }
2471 if (tg_pt_gp_id > 0x0000ffff) {
2472 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2473 " 0x0000ffff\n", tg_pt_gp_id);
2474 return -EINVAL;
2475 }
2476
2477 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2478 if (ret < 0)
2479 return -EINVAL;
2480
2481 printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2482 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2483 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2484 tg_pt_gp->tg_pt_gp_id);
2485
2486 return count;
2487}
2488
2489SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2490
2491/*
2492 * members
2493 */
2494static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2495 struct t10_alua_tg_pt_gp *tg_pt_gp,
2496 char *page)
2497{
2498 struct se_port *port;
2499 struct se_portal_group *tpg;
2500 struct se_lun *lun;
2501 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2502 ssize_t len = 0, cur_len;
2503 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2504
2505 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2506
2507 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2508 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2509 tg_pt_gp_mem_list) {
2510 port = tg_pt_gp_mem->tg_pt;
2511 tpg = port->sep_tpg;
2512 lun = port->sep_lun;
2513
2514 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2515 "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2516 TPG_TFO(tpg)->tpg_get_wwn(tpg),
2517 TPG_TFO(tpg)->tpg_get_tag(tpg),
2518 config_item_name(&lun->lun_group.cg_item));
2519 cur_len++; /* Extra byte for NULL terminator */
2520
2521 if ((cur_len + len) > PAGE_SIZE) {
2522 printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2523 "_members buffer\n");
2524 break;
2525 }
2526 memcpy(page+len, buf, cur_len);
2527 len += cur_len;
2528 }
2529 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2530
2531 return len;
2532}
2533
2534SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2535
2536CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2537 tg_pt_gp_group);
2538
2539static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2540 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2541 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2542 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2543 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2544 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2545 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2546 &target_core_alua_tg_pt_gp_preferred.attr,
2547 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2548 &target_core_alua_tg_pt_gp_members.attr,
2549 NULL,
2550};
2551
2552static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2553 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2554 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2555};
2556
2557static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2558 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2559 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2560 .ct_owner = THIS_MODULE,
2561};
2562
2563/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2564
2565/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2566
2567static struct config_group *target_core_alua_create_tg_pt_gp(
2568 struct config_group *group,
2569 const char *name)
2570{
2571 struct t10_alua *alua = container_of(group, struct t10_alua,
2572 alua_tg_pt_gps_group);
2573 struct t10_alua_tg_pt_gp *tg_pt_gp;
2574 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2575 struct config_group *alua_tg_pt_gp_cg = NULL;
2576 struct config_item *alua_tg_pt_gp_ci = NULL;
2577
2578 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2579 if (!(tg_pt_gp))
2580 return NULL;
2581
2582 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2583 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2584
2585 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2586 &target_core_alua_tg_pt_gp_cit);
2587
2588 printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2589 " Group: alua/tg_pt_gps/%s\n",
2590 config_item_name(alua_tg_pt_gp_ci));
2591
2592 return alua_tg_pt_gp_cg;
2593}
2594
2595static void target_core_alua_drop_tg_pt_gp(
2596 struct config_group *group,
2597 struct config_item *item)
2598{
2599 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2600 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2601
2602 printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2603 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2604 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2605
2606 config_item_put(item);
2607 core_alua_free_tg_pt_gp(tg_pt_gp);
2608}
2609
2610static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2611 .make_group = &target_core_alua_create_tg_pt_gp,
2612 .drop_item = &target_core_alua_drop_tg_pt_gp,
2613};
2614
2615static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2616 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2617 .ct_owner = THIS_MODULE,
2618};
2619
2620/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2621
2622/* Start functions for struct config_item_type target_core_alua_cit */
2623
2624/*
2625 * target_core_alua_cit is a ConfigFS group that lives under
2626 * /sys/kernel/config/target/core/alua. There are default groups
2627 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2628 * target_core_alua_cit in target_core_init_configfs() below.
2629 */
2630static struct config_item_type target_core_alua_cit = {
2631 .ct_item_ops = NULL,
2632 .ct_attrs = NULL,
2633 .ct_owner = THIS_MODULE,
2634};
2635
2636/* End functions for struct config_item_type target_core_alua_cit */
2637
2638/* Start functions for struct config_item_type target_core_hba_cit */
2639
2640static struct config_group *target_core_make_subdev(
2641 struct config_group *group,
2642 const char *name)
2643{
2644 struct t10_alua_tg_pt_gp *tg_pt_gp;
2645 struct se_subsystem_dev *se_dev;
2646 struct se_subsystem_api *t;
2647 struct config_item *hba_ci = &group->cg_item;
2648 struct se_hba *hba = item_to_hba(hba_ci);
2649 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2650
2651 if (mutex_lock_interruptible(&hba->hba_access_mutex))
2652 return NULL;
2653
2654 /*
2655 * Locate the struct se_subsystem_api from parent's struct se_hba.
2656 */
2657 t = hba->transport;
2658
2659 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2660 if (!se_dev) {
2661 printk(KERN_ERR "Unable to allocate memory for"
2662 " struct se_subsystem_dev\n");
2663 goto unlock;
2664 }
2665 INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2666 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2667 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2668 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2669 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2670 spin_lock_init(&se_dev->t10_reservation.registration_lock);
2671 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2672 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2673 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2674 spin_lock_init(&se_dev->se_dev_lock);
2675 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2676 se_dev->t10_wwn.t10_sub_dev = se_dev;
2677 se_dev->t10_alua.t10_sub_dev = se_dev;
2678 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2679
2680 se_dev->se_dev_hba = hba;
2681 dev_cg = &se_dev->se_dev_group;
2682
2683 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
2684 GFP_KERNEL);
2685 if (!(dev_cg->default_groups))
2686 goto out;
2687 /*
2688 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2689 * for ->allocate_virtdevice()
2690 *
2691 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2692 * has been called successfully in the next level up in the
2693 * configfs tree for device object's struct config_group.
2694 */
2695 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2696 if (!(se_dev->se_dev_su_ptr)) {
2697 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2698 " from allocate_virtdevice()\n");
2699 goto out;
2700 }
2701 spin_lock(&se_global->g_device_lock);
2702 list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2703 spin_unlock(&se_global->g_device_lock);
2704
2705 config_group_init_type_name(&se_dev->se_dev_group, name,
2706 &target_core_dev_cit);
2707 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2708 &target_core_dev_attrib_cit);
2709 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2710 &target_core_dev_pr_cit);
2711 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2712 &target_core_dev_wwn_cit);
2713 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2714 "alua", &target_core_alua_tg_pt_gps_cit);
2715 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2716 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2717 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2718 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2719 dev_cg->default_groups[4] = NULL;
2720 /*
2721 * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp
2722 */
2723 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2724 if (!(tg_pt_gp))
2725 goto out;
2726
2727 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2728 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2729 GFP_KERNEL);
2730 if (!(tg_pt_gp_cg->default_groups)) {
2731 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2732 "default_groups\n");
2733 goto out;
2734 }
2735
2736 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2737 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2738 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2739 tg_pt_gp_cg->default_groups[1] = NULL;
2740 T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2741
2742 printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2743 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2744
2745 mutex_unlock(&hba->hba_access_mutex);
2746 return &se_dev->se_dev_group;
2747out:
2748 if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2749 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2750 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2751 }
2752 if (tg_pt_gp_cg)
2753 kfree(tg_pt_gp_cg->default_groups);
2754 if (dev_cg)
2755 kfree(dev_cg->default_groups);
2756 if (se_dev->se_dev_su_ptr)
2757 t->free_device(se_dev->se_dev_su_ptr);
2758 kfree(se_dev);
2759unlock:
2760 mutex_unlock(&hba->hba_access_mutex);
2761 return NULL;
2762}
2763
2764static void target_core_drop_subdev(
2765 struct config_group *group,
2766 struct config_item *item)
2767{
2768 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2769 struct se_subsystem_dev, se_dev_group);
2770 struct se_hba *hba;
2771 struct se_subsystem_api *t;
2772 struct config_item *df_item;
2773 struct config_group *dev_cg, *tg_pt_gp_cg;
2774 int i, ret;
2775
2776 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2777
2778 if (mutex_lock_interruptible(&hba->hba_access_mutex))
2779 goto out;
2780
2781 t = hba->transport;
2782
2783 spin_lock(&se_global->g_device_lock);
2784 list_del(&se_dev->g_se_dev_list);
2785 spin_unlock(&se_global->g_device_lock);
2786
2787 tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2788 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2789 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2790 tg_pt_gp_cg->default_groups[i] = NULL;
2791 config_item_put(df_item);
2792 }
2793 kfree(tg_pt_gp_cg->default_groups);
2794 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2795 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2796
2797 dev_cg = &se_dev->se_dev_group;
2798 for (i = 0; dev_cg->default_groups[i]; i++) {
2799 df_item = &dev_cg->default_groups[i]->cg_item;
2800 dev_cg->default_groups[i] = NULL;
2801 config_item_put(df_item);
2802 }
2803
2804 config_item_put(item);
2805 /*
2806 * This pointer will set when the storage is enabled with:
2807 * `echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2808 */
2809 if (se_dev->se_dev_ptr) {
2810 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
2811 "virtual_device() for se_dev_ptr: %p\n",
2812 se_dev->se_dev_ptr);
2813
2814 ret = se_free_virtual_device(se_dev->se_dev_ptr, hba);
2815 if (ret < 0)
2816 goto hba_out;
2817 } else {
2818 /*
2819 * Release struct se_subsystem_dev->se_dev_su_ptr..
2820 */
2821 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2822 "device() for se_dev_su_ptr: %p\n",
2823 se_dev->se_dev_su_ptr);
2824
2825 t->free_device(se_dev->se_dev_su_ptr);
2826 }
2827
2828 printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2829 "_dev_t: %p\n", se_dev);
2830
2831hba_out:
2832 mutex_unlock(&hba->hba_access_mutex);
2833out:
2834 kfree(se_dev);
2835}
2836
2837static struct configfs_group_operations target_core_hba_group_ops = {
2838 .make_group = target_core_make_subdev,
2839 .drop_item = target_core_drop_subdev,
2840};
2841
2842CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2843#define SE_HBA_ATTR(_name, _mode) \
2844static struct target_core_hba_attribute \
2845 target_core_hba_##_name = \
2846 __CONFIGFS_EATTR(_name, _mode, \
2847 target_core_hba_show_attr_##_name, \
2848 target_core_hba_store_attr_##_name);
2849
2850#define SE_HBA_ATTR_RO(_name) \
2851static struct target_core_hba_attribute \
2852 target_core_hba_##_name = \
2853 __CONFIGFS_EATTR_RO(_name, \
2854 target_core_hba_show_attr_##_name);
2855
2856static ssize_t target_core_hba_show_attr_hba_info(
2857 struct se_hba *hba,
2858 char *page)
2859{
2860 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2861 hba->hba_id, hba->transport->name,
2862 TARGET_CORE_CONFIGFS_VERSION);
2863}
2864
2865SE_HBA_ATTR_RO(hba_info);
2866
2867static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2868 char *page)
2869{
2870 int hba_mode = 0;
2871
2872 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2873 hba_mode = 1;
2874
2875 return sprintf(page, "%d\n", hba_mode);
2876}
2877
2878static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2879 const char *page, size_t count)
2880{
2881 struct se_subsystem_api *transport = hba->transport;
2882 unsigned long mode_flag;
2883 int ret;
2884
2885 if (transport->pmode_enable_hba == NULL)
2886 return -EINVAL;
2887
2888 ret = strict_strtoul(page, 0, &mode_flag);
2889 if (ret < 0) {
2890 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2891 return -EINVAL;
2892 }
2893
2894 spin_lock(&hba->device_lock);
2895 if (!(list_empty(&hba->hba_dev_list))) {
2896 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2897 spin_unlock(&hba->device_lock);
2898 return -EINVAL;
2899 }
2900 spin_unlock(&hba->device_lock);
2901
2902 ret = transport->pmode_enable_hba(hba, mode_flag);
2903 if (ret < 0)
2904 return -EINVAL;
2905 if (ret > 0)
2906 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2907 else if (ret == 0)
2908 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2909
2910 return count;
2911}
2912
2913SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2914
2915CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2916
2917static struct configfs_attribute *target_core_hba_attrs[] = {
2918 &target_core_hba_hba_info.attr,
2919 &target_core_hba_hba_mode.attr,
2920 NULL,
2921};
2922
2923static struct configfs_item_operations target_core_hba_item_ops = {
2924 .show_attribute = target_core_hba_attr_show,
2925 .store_attribute = target_core_hba_attr_store,
2926};
2927
2928static struct config_item_type target_core_hba_cit = {
2929 .ct_item_ops = &target_core_hba_item_ops,
2930 .ct_group_ops = &target_core_hba_group_ops,
2931 .ct_attrs = target_core_hba_attrs,
2932 .ct_owner = THIS_MODULE,
2933};
2934
2935static struct config_group *target_core_call_addhbatotarget(
2936 struct config_group *group,
2937 const char *name)
2938{
2939 char *se_plugin_str, *str, *str2;
2940 struct se_hba *hba;
2941 char buf[TARGET_CORE_NAME_MAX_LEN];
2942 unsigned long plugin_dep_id = 0;
2943 int ret;
2944
2945 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2946 if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) {
2947 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
2948 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2949 TARGET_CORE_NAME_MAX_LEN);
2950 return ERR_PTR(-ENAMETOOLONG);
2951 }
2952 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2953
2954 str = strstr(buf, "_");
2955 if (!(str)) {
2956 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2957 return ERR_PTR(-EINVAL);
2958 }
2959 se_plugin_str = buf;
2960 /*
2961 * Special case for subsystem plugins that have "_" in their names.
2962 * Namely rd_direct and rd_mcp..
2963 */
2964 str2 = strstr(str+1, "_");
2965 if ((str2)) {
2966 *str2 = '\0'; /* Terminate for *se_plugin_str */
2967 str2++; /* Skip to start of plugin dependent ID */
2968 str = str2;
2969 } else {
2970 *str = '\0'; /* Terminate for *se_plugin_str */
2971 str++; /* Skip to start of plugin dependent ID */
2972 }
2973
2974 ret = strict_strtoul(str, 0, &plugin_dep_id);
2975 if (ret < 0) {
2976 printk(KERN_ERR "strict_strtoul() returned %d for"
2977 " plugin_dep_id\n", ret);
2978 return ERR_PTR(-EINVAL);
2979 }
2980 /*
2981 * Load up TCM subsystem plugins if they have not already been loaded.
2982 */
2983 if (transport_subsystem_check_init() < 0)
2984 return ERR_PTR(-EINVAL);
2985
2986 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2987 if (IS_ERR(hba))
2988 return ERR_CAST(hba);
2989
2990 config_group_init_type_name(&hba->hba_group, name,
2991 &target_core_hba_cit);
2992
2993 return &hba->hba_group;
2994}
2995
2996static void target_core_call_delhbafromtarget(
2997 struct config_group *group,
2998 struct config_item *item)
2999{
3000 struct se_hba *hba = item_to_hba(item);
3001
3002 config_item_put(item);
3003 core_delete_hba(hba);
3004}
3005
3006static struct configfs_group_operations target_core_group_ops = {
3007 .make_group = target_core_call_addhbatotarget,
3008 .drop_item = target_core_call_delhbafromtarget,
3009};
3010
3011static struct config_item_type target_core_cit = {
3012 .ct_item_ops = NULL,
3013 .ct_group_ops = &target_core_group_ops,
3014 .ct_attrs = NULL,
3015 .ct_owner = THIS_MODULE,
3016};
3017
3018/* Stop functions for struct config_item_type target_core_hba_cit */
3019
3020static int target_core_init_configfs(void)
3021{
3022 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3023 struct config_group *lu_gp_cg = NULL;
3024 struct configfs_subsystem *subsys;
3025 struct proc_dir_entry *scsi_target_proc = NULL;
3026 struct t10_alua_lu_gp *lu_gp;
3027 int ret;
3028
3029 printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3030 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3031 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3032
3033 subsys = target_core_subsystem[0];
3034 config_group_init(&subsys->su_group);
3035 mutex_init(&subsys->su_mutex);
3036
3037 INIT_LIST_HEAD(&g_tf_list);
3038 mutex_init(&g_tf_lock);
3039 init_scsi_index_table();
3040 ret = init_se_global();
3041 if (ret < 0)
3042 return -1;
3043 /*
3044 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3045 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3046 */
3047 target_cg = &subsys->su_group;
3048 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3049 GFP_KERNEL);
3050 if (!(target_cg->default_groups)) {
3051 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3052 goto out_global;
3053 }
3054
3055 config_group_init_type_name(&se_global->target_core_hbagroup,
3056 "core", &target_core_cit);
3057 target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3058 target_cg->default_groups[1] = NULL;
3059 /*
3060 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3061 */
3062 hba_cg = &se_global->target_core_hbagroup;
3063 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3064 GFP_KERNEL);
3065 if (!(hba_cg->default_groups)) {
3066 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3067 goto out_global;
3068 }
3069 config_group_init_type_name(&se_global->alua_group,
3070 "alua", &target_core_alua_cit);
3071 hba_cg->default_groups[0] = &se_global->alua_group;
3072 hba_cg->default_groups[1] = NULL;
3073 /*
3074 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3075 * groups under /sys/kernel/config/target/core/alua/
3076 */
3077 alua_cg = &se_global->alua_group;
3078 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3079 GFP_KERNEL);
3080 if (!(alua_cg->default_groups)) {
3081 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3082 goto out_global;
3083 }
3084
3085 config_group_init_type_name(&se_global->alua_lu_gps_group,
3086 "lu_gps", &target_core_alua_lu_gps_cit);
3087 alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3088 alua_cg->default_groups[1] = NULL;
3089 /*
3090 * Add core/alua/lu_gps/default_lu_gp
3091 */
3092 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3093 if (IS_ERR(lu_gp))
3094 goto out_global;
3095
3096 lu_gp_cg = &se_global->alua_lu_gps_group;
3097 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3098 GFP_KERNEL);
3099 if (!(lu_gp_cg->default_groups)) {
3100 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3101 goto out_global;
3102 }
3103
3104 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3105 &target_core_alua_lu_gp_cit);
3106 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3107 lu_gp_cg->default_groups[1] = NULL;
3108 se_global->default_lu_gp = lu_gp;
3109 /*
3110 * Register the target_core_mod subsystem with configfs.
3111 */
3112 ret = configfs_register_subsystem(subsys);
3113 if (ret < 0) {
3114 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3115 ret, subsys->su_group.cg_item.ci_namebuf);
3116 goto out_global;
3117 }
3118 printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3119 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3120 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3121 /*
3122 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3123 */
3124 ret = rd_module_init();
3125 if (ret < 0)
3126 goto out;
3127
3128 if (core_dev_setup_virtual_lun0() < 0)
3129 goto out;
3130
3131 scsi_target_proc = proc_mkdir("scsi_target", 0);
3132 if (!(scsi_target_proc)) {
3133 printk(KERN_ERR "proc_mkdir(scsi_target, 0) failed\n");
3134 goto out;
3135 }
3136 ret = init_scsi_target_mib();
3137 if (ret < 0)
3138 goto out;
3139
3140 return 0;
3141
3142out:
3143 configfs_unregister_subsystem(subsys);
3144 if (scsi_target_proc)
3145 remove_proc_entry("scsi_target", 0);
3146 core_dev_release_virtual_lun0();
3147 rd_module_exit();
3148out_global:
3149 if (se_global->default_lu_gp) {
3150 core_alua_free_lu_gp(se_global->default_lu_gp);
3151 se_global->default_lu_gp = NULL;
3152 }
3153 if (lu_gp_cg)
3154 kfree(lu_gp_cg->default_groups);
3155 if (alua_cg)
3156 kfree(alua_cg->default_groups);
3157 if (hba_cg)
3158 kfree(hba_cg->default_groups);
3159 kfree(target_cg->default_groups);
3160 release_se_global();
3161 return -1;
3162}
3163
3164static void target_core_exit_configfs(void)
3165{
3166 struct configfs_subsystem *subsys;
3167 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3168 struct config_item *item;
3169 int i;
3170
3171 se_global->in_shutdown = 1;
3172 subsys = target_core_subsystem[0];
3173
3174 lu_gp_cg = &se_global->alua_lu_gps_group;
3175 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3176 item = &lu_gp_cg->default_groups[i]->cg_item;
3177 lu_gp_cg->default_groups[i] = NULL;
3178 config_item_put(item);
3179 }
3180 kfree(lu_gp_cg->default_groups);
3181 core_alua_free_lu_gp(se_global->default_lu_gp);
3182 se_global->default_lu_gp = NULL;
3183
3184 alua_cg = &se_global->alua_group;
3185 for (i = 0; alua_cg->default_groups[i]; i++) {
3186 item = &alua_cg->default_groups[i]->cg_item;
3187 alua_cg->default_groups[i] = NULL;
3188 config_item_put(item);
3189 }
3190 kfree(alua_cg->default_groups);
3191
3192 hba_cg = &se_global->target_core_hbagroup;
3193 for (i = 0; hba_cg->default_groups[i]; i++) {
3194 item = &hba_cg->default_groups[i]->cg_item;
3195 hba_cg->default_groups[i] = NULL;
3196 config_item_put(item);
3197 }
3198 kfree(hba_cg->default_groups);
3199
3200 for (i = 0; subsys->su_group.default_groups[i]; i++) {
3201 item = &subsys->su_group.default_groups[i]->cg_item;
3202 subsys->su_group.default_groups[i] = NULL;
3203 config_item_put(item);
3204 }
3205 kfree(subsys->su_group.default_groups);
3206
3207 configfs_unregister_subsystem(subsys);
3208 printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3209 " Infrastructure\n");
3210
3211 remove_scsi_target_mib();
3212 remove_proc_entry("scsi_target", 0);
3213 core_dev_release_virtual_lun0();
3214 rd_module_exit();
3215 release_se_global();
3216
3217 return;
3218}
3219
3220MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3221MODULE_AUTHOR("nab@Linux-iSCSI.org");
3222MODULE_LICENSE("GPL");
3223
3224module_init(target_core_init_configfs);
3225module_exit(target_core_exit_configfs);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 05:21:18 -0500