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Bluetooth: hci_uart: Use generic functionality from Broadcom module
[linux/fpc-iii.git] / drivers / target / target_core_configfs.c
blob75d89adfccc025f7fa862c5c7aba157113b001ea
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2013 Datera, Inc.
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
28 #include <linux/fs.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
39
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43 #include <target/target_core_fabric_configfs.h>
44 #include <target/target_core_configfs.h>
45 #include <target/configfs_macros.h>
46
47 #include "target_core_internal.h"
48 #include "target_core_alua.h"
49 #include "target_core_pr.h"
50 #include "target_core_rd.h"
51 #include "target_core_xcopy.h"
52
53 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
54 static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
55 { \
56 struct target_backend_cits *tbc = &sa->tb_cits; \
57 struct config_item_type *cit = &tbc->tb_##_name##_cit; \
58 \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = _attrs; \
62 cit->ct_owner = sa->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
64 }
65
66 extern struct t10_alua_lu_gp *default_lu_gp;
67
68 static LIST_HEAD(g_tf_list);
69 static DEFINE_MUTEX(g_tf_lock);
70
71 struct target_core_configfs_attribute {
72 struct configfs_attribute attr;
73 ssize_t (*show)(void *, char *);
74 ssize_t (*store)(void *, const char *, size_t);
75 };
76
77 static struct config_group target_core_hbagroup;
78 static struct config_group alua_group;
79 static struct config_group alua_lu_gps_group;
80
81 static inline struct se_hba *
82 item_to_hba(struct config_item *item)
83 {
84 return container_of(to_config_group(item), struct se_hba, hba_group);
85 }
86
87 /*
88 * Attributes for /sys/kernel/config/target/
89 */
90 static ssize_t target_core_attr_show(struct config_item *item,
91 struct configfs_attribute *attr,
92 char *page)
93 {
94 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
95 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
96 utsname()->sysname, utsname()->machine);
97 }
98
99 static struct configfs_item_operations target_core_fabric_item_ops = {
100 .show_attribute = target_core_attr_show,
101 };
102
103 static struct configfs_attribute target_core_item_attr_version = {
104 .ca_owner = THIS_MODULE,
105 .ca_name = "version",
106 .ca_mode = S_IRUGO,
107 };
108
109 static struct target_fabric_configfs *target_core_get_fabric(
110 const char *name)
111 {
112 struct target_fabric_configfs *tf;
113
114 if (!name)
115 return NULL;
116
117 mutex_lock(&g_tf_lock);
118 list_for_each_entry(tf, &g_tf_list, tf_list) {
119 if (!strcmp(tf->tf_name, name)) {
120 atomic_inc(&tf->tf_access_cnt);
121 mutex_unlock(&g_tf_lock);
122 return tf;
123 }
124 }
125 mutex_unlock(&g_tf_lock);
126
127 return NULL;
128 }
129
130 /*
131 * Called from struct target_core_group_ops->make_group()
132 */
133 static struct config_group *target_core_register_fabric(
134 struct config_group *group,
135 const char *name)
136 {
137 struct target_fabric_configfs *tf;
138 int ret;
139
140 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
141 " %s\n", group, name);
142
143 tf = target_core_get_fabric(name);
144 if (!tf) {
145 pr_err("target_core_register_fabric() trying autoload for %s\n",
146 name);
147
148 /*
149 * Below are some hardcoded request_module() calls to automatically
150 * local fabric modules when the following is called:
151 *
152 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
153 *
154 * Note that this does not limit which TCM fabric module can be
155 * registered, but simply provids auto loading logic for modules with
156 * mkdir(2) system calls with known TCM fabric modules.
157 */
158
159 if (!strncmp(name, "iscsi", 5)) {
160 /*
161 * Automatically load the LIO Target fabric module when the
162 * following is called:
163 *
164 * mkdir -p $CONFIGFS/target/iscsi
165 */
166 ret = request_module("iscsi_target_mod");
167 if (ret < 0) {
168 pr_err("request_module() failed for"
169 " iscsi_target_mod.ko: %d\n", ret);
170 return ERR_PTR(-EINVAL);
171 }
172 } else if (!strncmp(name, "loopback", 8)) {
173 /*
174 * Automatically load the tcm_loop fabric module when the
175 * following is called:
176 *
177 * mkdir -p $CONFIGFS/target/loopback
178 */
179 ret = request_module("tcm_loop");
180 if (ret < 0) {
181 pr_err("request_module() failed for"
182 " tcm_loop.ko: %d\n", ret);
183 return ERR_PTR(-EINVAL);
184 }
185 }
186
187 tf = target_core_get_fabric(name);
188 }
189
190 if (!tf) {
191 pr_err("target_core_get_fabric() failed for %s\n",
192 name);
193 return ERR_PTR(-EINVAL);
194 }
195 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
196 " %s\n", tf->tf_name);
197 /*
198 * On a successful target_core_get_fabric() look, the returned
199 * struct target_fabric_configfs *tf will contain a usage reference.
200 */
201 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
202 &tf->tf_cit_tmpl.tfc_wwn_cit);
203
204 tf->tf_group.default_groups = tf->tf_default_groups;
205 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
206 tf->tf_group.default_groups[1] = NULL;
207
208 config_group_init_type_name(&tf->tf_group, name,
209 &tf->tf_cit_tmpl.tfc_wwn_cit);
210 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
211 &tf->tf_cit_tmpl.tfc_discovery_cit);
212
213 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
214 " %s\n", tf->tf_group.cg_item.ci_name);
215 /*
216 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
217 */
218 tf->tf_ops.tf_subsys = tf->tf_subsys;
219 tf->tf_fabric = &tf->tf_group.cg_item;
220 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
221 " for %s\n", name);
222
223 return &tf->tf_group;
224 }
225
226 /*
227 * Called from struct target_core_group_ops->drop_item()
228 */
229 static void target_core_deregister_fabric(
230 struct config_group *group,
231 struct config_item *item)
232 {
233 struct target_fabric_configfs *tf = container_of(
234 to_config_group(item), struct target_fabric_configfs, tf_group);
235 struct config_group *tf_group;
236 struct config_item *df_item;
237 int i;
238
239 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
240 " tf list\n", config_item_name(item));
241
242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
243 " %s\n", tf->tf_name);
244 atomic_dec(&tf->tf_access_cnt);
245
246 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
247 " tf->tf_fabric for %s\n", tf->tf_name);
248 tf->tf_fabric = NULL;
249
250 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
251 " %s\n", config_item_name(item));
252
253 tf_group = &tf->tf_group;
254 for (i = 0; tf_group->default_groups[i]; i++) {
255 df_item = &tf_group->default_groups[i]->cg_item;
256 tf_group->default_groups[i] = NULL;
257 config_item_put(df_item);
258 }
259 config_item_put(item);
260 }
261
262 static struct configfs_group_operations target_core_fabric_group_ops = {
263 .make_group = &target_core_register_fabric,
264 .drop_item = &target_core_deregister_fabric,
265 };
266
267 /*
268 * All item attributes appearing in /sys/kernel/target/ appear here.
269 */
270 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
271 &target_core_item_attr_version,
272 NULL,
273 };
274
275 /*
276 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
277 */
278 static struct config_item_type target_core_fabrics_item = {
279 .ct_item_ops = &target_core_fabric_item_ops,
280 .ct_group_ops = &target_core_fabric_group_ops,
281 .ct_attrs = target_core_fabric_item_attrs,
282 .ct_owner = THIS_MODULE,
283 };
284
285 static struct configfs_subsystem target_core_fabrics = {
286 .su_group = {
287 .cg_item = {
288 .ci_namebuf = "target",
289 .ci_type = &target_core_fabrics_item,
290 },
291 },
292 };
293
294 struct configfs_subsystem *target_core_subsystem[] = {
295 &target_core_fabrics,
296 NULL,
297 };
298
299 /*##############################################################################
300 // Start functions called by external Target Fabrics Modules
301 //############################################################################*/
302
303 /*
304 * First function called by fabric modules to:
305 *
306 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
307 * 2) Add struct target_fabric_configfs to g_tf_list
308 * 3) Return struct target_fabric_configfs to fabric module to be passed
309 * into target_fabric_configfs_register().
310 */
311 struct target_fabric_configfs *target_fabric_configfs_init(
312 struct module *fabric_mod,
313 const char *name)
314 {
315 struct target_fabric_configfs *tf;
316
317 if (!(name)) {
318 pr_err("Unable to locate passed fabric name\n");
319 return ERR_PTR(-EINVAL);
320 }
321 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
322 pr_err("Passed name: %s exceeds TARGET_FABRIC"
323 "_NAME_SIZE\n", name);
324 return ERR_PTR(-EINVAL);
325 }
326
327 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
328 if (!tf)
329 return ERR_PTR(-ENOMEM);
330
331 INIT_LIST_HEAD(&tf->tf_list);
332 atomic_set(&tf->tf_access_cnt, 0);
333 /*
334 * Setup the default generic struct config_item_type's (cits) in
335 * struct target_fabric_configfs->tf_cit_tmpl
336 */
337 tf->tf_module = fabric_mod;
338 target_fabric_setup_cits(tf);
339
340 tf->tf_subsys = target_core_subsystem[0];
341 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
342
343 mutex_lock(&g_tf_lock);
344 list_add_tail(&tf->tf_list, &g_tf_list);
345 mutex_unlock(&g_tf_lock);
346
347 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
348 ">>>>>>>>>>>>>>\n");
349 pr_debug("Initialized struct target_fabric_configfs: %p for"
350 " %s\n", tf, tf->tf_name);
351 return tf;
352 }
353 EXPORT_SYMBOL(target_fabric_configfs_init);
354
355 /*
356 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
357 */
358 void target_fabric_configfs_free(
359 struct target_fabric_configfs *tf)
360 {
361 mutex_lock(&g_tf_lock);
362 list_del(&tf->tf_list);
363 mutex_unlock(&g_tf_lock);
364
365 kfree(tf);
366 }
367 EXPORT_SYMBOL(target_fabric_configfs_free);
368
369 /*
370 * Perform a sanity check of the passed tf->tf_ops before completing
371 * TCM fabric module registration.
372 */
373 static int target_fabric_tf_ops_check(
374 struct target_fabric_configfs *tf)
375 {
376 struct target_core_fabric_ops *tfo = &tf->tf_ops;
377
378 if (!tfo->get_fabric_name) {
379 pr_err("Missing tfo->get_fabric_name()\n");
380 return -EINVAL;
381 }
382 if (!tfo->get_fabric_proto_ident) {
383 pr_err("Missing tfo->get_fabric_proto_ident()\n");
384 return -EINVAL;
385 }
386 if (!tfo->tpg_get_wwn) {
387 pr_err("Missing tfo->tpg_get_wwn()\n");
388 return -EINVAL;
389 }
390 if (!tfo->tpg_get_tag) {
391 pr_err("Missing tfo->tpg_get_tag()\n");
392 return -EINVAL;
393 }
394 if (!tfo->tpg_get_default_depth) {
395 pr_err("Missing tfo->tpg_get_default_depth()\n");
396 return -EINVAL;
397 }
398 if (!tfo->tpg_get_pr_transport_id) {
399 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
400 return -EINVAL;
401 }
402 if (!tfo->tpg_get_pr_transport_id_len) {
403 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
404 return -EINVAL;
405 }
406 if (!tfo->tpg_check_demo_mode) {
407 pr_err("Missing tfo->tpg_check_demo_mode()\n");
408 return -EINVAL;
409 }
410 if (!tfo->tpg_check_demo_mode_cache) {
411 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
412 return -EINVAL;
413 }
414 if (!tfo->tpg_check_demo_mode_write_protect) {
415 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
416 return -EINVAL;
417 }
418 if (!tfo->tpg_check_prod_mode_write_protect) {
419 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
420 return -EINVAL;
421 }
422 if (!tfo->tpg_alloc_fabric_acl) {
423 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
424 return -EINVAL;
425 }
426 if (!tfo->tpg_release_fabric_acl) {
427 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
428 return -EINVAL;
429 }
430 if (!tfo->tpg_get_inst_index) {
431 pr_err("Missing tfo->tpg_get_inst_index()\n");
432 return -EINVAL;
433 }
434 if (!tfo->release_cmd) {
435 pr_err("Missing tfo->release_cmd()\n");
436 return -EINVAL;
437 }
438 if (!tfo->shutdown_session) {
439 pr_err("Missing tfo->shutdown_session()\n");
440 return -EINVAL;
441 }
442 if (!tfo->close_session) {
443 pr_err("Missing tfo->close_session()\n");
444 return -EINVAL;
445 }
446 if (!tfo->sess_get_index) {
447 pr_err("Missing tfo->sess_get_index()\n");
448 return -EINVAL;
449 }
450 if (!tfo->write_pending) {
451 pr_err("Missing tfo->write_pending()\n");
452 return -EINVAL;
453 }
454 if (!tfo->write_pending_status) {
455 pr_err("Missing tfo->write_pending_status()\n");
456 return -EINVAL;
457 }
458 if (!tfo->set_default_node_attributes) {
459 pr_err("Missing tfo->set_default_node_attributes()\n");
460 return -EINVAL;
461 }
462 if (!tfo->get_task_tag) {
463 pr_err("Missing tfo->get_task_tag()\n");
464 return -EINVAL;
465 }
466 if (!tfo->get_cmd_state) {
467 pr_err("Missing tfo->get_cmd_state()\n");
468 return -EINVAL;
469 }
470 if (!tfo->queue_data_in) {
471 pr_err("Missing tfo->queue_data_in()\n");
472 return -EINVAL;
473 }
474 if (!tfo->queue_status) {
475 pr_err("Missing tfo->queue_status()\n");
476 return -EINVAL;
477 }
478 if (!tfo->queue_tm_rsp) {
479 pr_err("Missing tfo->queue_tm_rsp()\n");
480 return -EINVAL;
481 }
482 if (!tfo->aborted_task) {
483 pr_err("Missing tfo->aborted_task()\n");
484 return -EINVAL;
485 }
486 /*
487 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
488 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
489 * target_core_fabric_configfs.c WWN+TPG group context code.
490 */
491 if (!tfo->fabric_make_wwn) {
492 pr_err("Missing tfo->fabric_make_wwn()\n");
493 return -EINVAL;
494 }
495 if (!tfo->fabric_drop_wwn) {
496 pr_err("Missing tfo->fabric_drop_wwn()\n");
497 return -EINVAL;
498 }
499 if (!tfo->fabric_make_tpg) {
500 pr_err("Missing tfo->fabric_make_tpg()\n");
501 return -EINVAL;
502 }
503 if (!tfo->fabric_drop_tpg) {
504 pr_err("Missing tfo->fabric_drop_tpg()\n");
505 return -EINVAL;
506 }
507
508 return 0;
509 }
510
511 /*
512 * Called 2nd from fabric module with returned parameter of
513 * struct target_fabric_configfs * from target_fabric_configfs_init().
514 *
515 * Upon a successful registration, the new fabric's struct config_item is
516 * return. Also, a pointer to this struct is set in the passed
517 * struct target_fabric_configfs.
518 */
519 int target_fabric_configfs_register(
520 struct target_fabric_configfs *tf)
521 {
522 int ret;
523
524 if (!tf) {
525 pr_err("Unable to locate target_fabric_configfs"
526 " pointer\n");
527 return -EINVAL;
528 }
529 if (!tf->tf_subsys) {
530 pr_err("Unable to target struct config_subsystem"
531 " pointer\n");
532 return -EINVAL;
533 }
534 ret = target_fabric_tf_ops_check(tf);
535 if (ret < 0)
536 return ret;
537
538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
539 ">>>>>>>>>>\n");
540 return 0;
541 }
542 EXPORT_SYMBOL(target_fabric_configfs_register);
543
544 void target_fabric_configfs_deregister(
545 struct target_fabric_configfs *tf)
546 {
547 struct configfs_subsystem *su;
548
549 if (!tf) {
550 pr_err("Unable to locate passed target_fabric_"
551 "configfs\n");
552 return;
553 }
554 su = tf->tf_subsys;
555 if (!su) {
556 pr_err("Unable to locate passed tf->tf_subsys"
557 " pointer\n");
558 return;
559 }
560 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
561 ">>>>>>>>>>>>\n");
562 mutex_lock(&g_tf_lock);
563 if (atomic_read(&tf->tf_access_cnt)) {
564 mutex_unlock(&g_tf_lock);
565 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
566 tf->tf_name);
567 BUG();
568 }
569 list_del(&tf->tf_list);
570 mutex_unlock(&g_tf_lock);
571
572 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
573 " %s\n", tf->tf_name);
574 tf->tf_module = NULL;
575 tf->tf_subsys = NULL;
576 kfree(tf);
577
578 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
579 ">>>>>\n");
580 }
581 EXPORT_SYMBOL(target_fabric_configfs_deregister);
582
583 /*##############################################################################
584 // Stop functions called by external Target Fabrics Modules
585 //############################################################################*/
586
587 /* Start functions for struct config_item_type tb_dev_attrib_cit */
588
589 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
590 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
591
592 static struct configfs_item_operations target_core_dev_attrib_ops = {
593 .show_attribute = target_core_dev_attrib_attr_show,
594 .store_attribute = target_core_dev_attrib_attr_store,
595 };
596
597 TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
598
599 /* End functions for struct config_item_type tb_dev_attrib_cit */
600
601 /* Start functions for struct config_item_type tb_dev_wwn_cit */
602
603 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
604 #define SE_DEV_WWN_ATTR(_name, _mode) \
605 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
606 __CONFIGFS_EATTR(_name, _mode, \
607 target_core_dev_wwn_show_attr_##_name, \
608 target_core_dev_wwn_store_attr_##_name);
609
610 #define SE_DEV_WWN_ATTR_RO(_name); \
611 do { \
612 static struct target_core_dev_wwn_attribute \
613 target_core_dev_wwn_##_name = \
614 __CONFIGFS_EATTR_RO(_name, \
615 target_core_dev_wwn_show_attr_##_name); \
616 } while (0);
617
618 /*
619 * VPD page 0x80 Unit serial
620 */
621 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
622 struct t10_wwn *t10_wwn,
623 char *page)
624 {
625 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
626 &t10_wwn->unit_serial[0]);
627 }
628
629 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
630 struct t10_wwn *t10_wwn,
631 const char *page,
632 size_t count)
633 {
634 struct se_device *dev = t10_wwn->t10_dev;
635 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
636
637 /*
638 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
639 * from the struct scsi_device level firmware, do not allow
640 * VPD Unit Serial to be emulated.
641 *
642 * Note this struct scsi_device could also be emulating VPD
643 * information from its drivers/scsi LLD. But for now we assume
644 * it is doing 'the right thing' wrt a world wide unique
645 * VPD Unit Serial Number that OS dependent multipath can depend on.
646 */
647 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
648 pr_err("Underlying SCSI device firmware provided VPD"
649 " Unit Serial, ignoring request\n");
650 return -EOPNOTSUPP;
651 }
652
653 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
654 pr_err("Emulated VPD Unit Serial exceeds"
655 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
656 return -EOVERFLOW;
657 }
658 /*
659 * Check to see if any active $FABRIC_MOD exports exist. If they
660 * do exist, fail here as changing this information on the fly
661 * (underneath the initiator side OS dependent multipath code)
662 * could cause negative effects.
663 */
664 if (dev->export_count) {
665 pr_err("Unable to set VPD Unit Serial while"
666 " active %d $FABRIC_MOD exports exist\n",
667 dev->export_count);
668 return -EINVAL;
669 }
670
671 /*
672 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
673 *
674 * Also, strip any newline added from the userspace
675 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
676 */
677 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
678 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
679 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
680 "%s", strstrip(buf));
681 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
682
683 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
684 " %s\n", dev->t10_wwn.unit_serial);
685
686 return count;
687 }
688
689 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
690
691 /*
692 * VPD page 0x83 Protocol Identifier
693 */
694 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
695 struct t10_wwn *t10_wwn,
696 char *page)
697 {
698 struct t10_vpd *vpd;
699 unsigned char buf[VPD_TMP_BUF_SIZE];
700 ssize_t len = 0;
701
702 memset(buf, 0, VPD_TMP_BUF_SIZE);
703
704 spin_lock(&t10_wwn->t10_vpd_lock);
705 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
706 if (!vpd->protocol_identifier_set)
707 continue;
708
709 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
710
711 if (len + strlen(buf) >= PAGE_SIZE)
712 break;
713
714 len += sprintf(page+len, "%s", buf);
715 }
716 spin_unlock(&t10_wwn->t10_vpd_lock);
717
718 return len;
719 }
720
721 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
722 struct t10_wwn *t10_wwn,
723 const char *page,
724 size_t count)
725 {
726 return -ENOSYS;
727 }
728
729 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
730
731 /*
732 * Generic wrapper for dumping VPD identifiers by association.
733 */
734 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
735 static ssize_t target_core_dev_wwn_show_attr_##_name( \
736 struct t10_wwn *t10_wwn, \
737 char *page) \
738 { \
739 struct t10_vpd *vpd; \
740 unsigned char buf[VPD_TMP_BUF_SIZE]; \
741 ssize_t len = 0; \
742 \
743 spin_lock(&t10_wwn->t10_vpd_lock); \
744 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
745 if (vpd->association != _assoc) \
746 continue; \
747 \
748 memset(buf, 0, VPD_TMP_BUF_SIZE); \
749 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
750 if (len + strlen(buf) >= PAGE_SIZE) \
751 break; \
752 len += sprintf(page+len, "%s", buf); \
753 \
754 memset(buf, 0, VPD_TMP_BUF_SIZE); \
755 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
756 if (len + strlen(buf) >= PAGE_SIZE) \
757 break; \
758 len += sprintf(page+len, "%s", buf); \
759 \
760 memset(buf, 0, VPD_TMP_BUF_SIZE); \
761 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
762 if (len + strlen(buf) >= PAGE_SIZE) \
763 break; \
764 len += sprintf(page+len, "%s", buf); \
765 } \
766 spin_unlock(&t10_wwn->t10_vpd_lock); \
767 \
768 return len; \
769 }
770
771 /*
772 * VPD page 0x83 Association: Logical Unit
773 */
774 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
775
776 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
777 struct t10_wwn *t10_wwn,
778 const char *page,
779 size_t count)
780 {
781 return -ENOSYS;
782 }
783
784 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
785
786 /*
787 * VPD page 0x83 Association: Target Port
788 */
789 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
790
791 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
792 struct t10_wwn *t10_wwn,
793 const char *page,
794 size_t count)
795 {
796 return -ENOSYS;
797 }
798
799 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
800
801 /*
802 * VPD page 0x83 Association: SCSI Target Device
803 */
804 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
805
806 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
807 struct t10_wwn *t10_wwn,
808 const char *page,
809 size_t count)
810 {
811 return -ENOSYS;
812 }
813
814 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
815
816 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
817
818 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
819 &target_core_dev_wwn_vpd_unit_serial.attr,
820 &target_core_dev_wwn_vpd_protocol_identifier.attr,
821 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
822 &target_core_dev_wwn_vpd_assoc_target_port.attr,
823 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
824 NULL,
825 };
826
827 static struct configfs_item_operations target_core_dev_wwn_ops = {
828 .show_attribute = target_core_dev_wwn_attr_show,
829 .store_attribute = target_core_dev_wwn_attr_store,
830 };
831
832 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
833
834 /* End functions for struct config_item_type tb_dev_wwn_cit */
835
836 /* Start functions for struct config_item_type tb_dev_pr_cit */
837
838 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
839 #define SE_DEV_PR_ATTR(_name, _mode) \
840 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
841 __CONFIGFS_EATTR(_name, _mode, \
842 target_core_dev_pr_show_attr_##_name, \
843 target_core_dev_pr_store_attr_##_name);
844
845 #define SE_DEV_PR_ATTR_RO(_name); \
846 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
847 __CONFIGFS_EATTR_RO(_name, \
848 target_core_dev_pr_show_attr_##_name);
849
850 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
851 char *page)
852 {
853 struct se_node_acl *se_nacl;
854 struct t10_pr_registration *pr_reg;
855 char i_buf[PR_REG_ISID_ID_LEN];
856
857 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
858
859 pr_reg = dev->dev_pr_res_holder;
860 if (!pr_reg)
861 return sprintf(page, "No SPC-3 Reservation holder\n");
862
863 se_nacl = pr_reg->pr_reg_nacl;
864 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
865
866 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
867 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
868 se_nacl->initiatorname, i_buf);
869 }
870
871 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
872 char *page)
873 {
874 struct se_node_acl *se_nacl;
875 ssize_t len;
876
877 se_nacl = dev->dev_reserved_node_acl;
878 if (se_nacl) {
879 len = sprintf(page,
880 "SPC-2 Reservation: %s Initiator: %s\n",
881 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
882 se_nacl->initiatorname);
883 } else {
884 len = sprintf(page, "No SPC-2 Reservation holder\n");
885 }
886 return len;
887 }
888
889 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
890 char *page)
891 {
892 int ret;
893
894 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
895 return sprintf(page, "Passthrough\n");
896
897 spin_lock(&dev->dev_reservation_lock);
898 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
899 ret = target_core_dev_pr_show_spc2_res(dev, page);
900 else
901 ret = target_core_dev_pr_show_spc3_res(dev, page);
902 spin_unlock(&dev->dev_reservation_lock);
903 return ret;
904 }
905
906 SE_DEV_PR_ATTR_RO(res_holder);
907
908 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
909 struct se_device *dev, char *page)
910 {
911 ssize_t len = 0;
912
913 spin_lock(&dev->dev_reservation_lock);
914 if (!dev->dev_pr_res_holder) {
915 len = sprintf(page, "No SPC-3 Reservation holder\n");
916 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
917 len = sprintf(page, "SPC-3 Reservation: All Target"
918 " Ports registration\n");
919 } else {
920 len = sprintf(page, "SPC-3 Reservation: Single"
921 " Target Port registration\n");
922 }
923
924 spin_unlock(&dev->dev_reservation_lock);
925 return len;
926 }
927
928 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
929
930 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
931 struct se_device *dev, char *page)
932 {
933 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
934 }
935
936 SE_DEV_PR_ATTR_RO(res_pr_generation);
937
938 /*
939 * res_pr_holder_tg_port
940 */
941 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
942 struct se_device *dev, char *page)
943 {
944 struct se_node_acl *se_nacl;
945 struct se_lun *lun;
946 struct se_portal_group *se_tpg;
947 struct t10_pr_registration *pr_reg;
948 struct target_core_fabric_ops *tfo;
949 ssize_t len = 0;
950
951 spin_lock(&dev->dev_reservation_lock);
952 pr_reg = dev->dev_pr_res_holder;
953 if (!pr_reg) {
954 len = sprintf(page, "No SPC-3 Reservation holder\n");
955 goto out_unlock;
956 }
957
958 se_nacl = pr_reg->pr_reg_nacl;
959 se_tpg = se_nacl->se_tpg;
960 lun = pr_reg->pr_reg_tg_pt_lun;
961 tfo = se_tpg->se_tpg_tfo;
962
963 len += sprintf(page+len, "SPC-3 Reservation: %s"
964 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
965 tfo->tpg_get_wwn(se_tpg));
966 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
967 " Identifier Tag: %hu %s Portal Group Tag: %hu"
968 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
969 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
970 tfo->get_fabric_name(), lun->unpacked_lun);
971
972 out_unlock:
973 spin_unlock(&dev->dev_reservation_lock);
974 return len;
975 }
976
977 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
978
979 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
980 struct se_device *dev, char *page)
981 {
982 struct target_core_fabric_ops *tfo;
983 struct t10_pr_registration *pr_reg;
984 unsigned char buf[384];
985 char i_buf[PR_REG_ISID_ID_LEN];
986 ssize_t len = 0;
987 int reg_count = 0;
988
989 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
990
991 spin_lock(&dev->t10_pr.registration_lock);
992 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
993 pr_reg_list) {
994
995 memset(buf, 0, 384);
996 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
997 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
998 core_pr_dump_initiator_port(pr_reg, i_buf,
999 PR_REG_ISID_ID_LEN);
1000 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1001 tfo->get_fabric_name(),
1002 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1003 pr_reg->pr_res_generation);
1004
1005 if (len + strlen(buf) >= PAGE_SIZE)
1006 break;
1007
1008 len += sprintf(page+len, "%s", buf);
1009 reg_count++;
1010 }
1011 spin_unlock(&dev->t10_pr.registration_lock);
1012
1013 if (!reg_count)
1014 len += sprintf(page+len, "None\n");
1015
1016 return len;
1017 }
1018
1019 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1020
1021 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1022 struct se_device *dev, char *page)
1023 {
1024 struct t10_pr_registration *pr_reg;
1025 ssize_t len = 0;
1026
1027 spin_lock(&dev->dev_reservation_lock);
1028 pr_reg = dev->dev_pr_res_holder;
1029 if (pr_reg) {
1030 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1031 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1032 } else {
1033 len = sprintf(page, "No SPC-3 Reservation holder\n");
1034 }
1035
1036 spin_unlock(&dev->dev_reservation_lock);
1037 return len;
1038 }
1039
1040 SE_DEV_PR_ATTR_RO(res_pr_type);
1041
1042 static ssize_t target_core_dev_pr_show_attr_res_type(
1043 struct se_device *dev, char *page)
1044 {
1045 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1046 return sprintf(page, "SPC_PASSTHROUGH\n");
1047 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1048 return sprintf(page, "SPC2_RESERVATIONS\n");
1049 else
1050 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1051 }
1052
1053 SE_DEV_PR_ATTR_RO(res_type);
1054
1055 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1056 struct se_device *dev, char *page)
1057 {
1058 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1059 return 0;
1060
1061 return sprintf(page, "APTPL Bit Status: %s\n",
1062 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1063 }
1064
1065 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1066
1067 /*
1068 * res_aptpl_metadata
1069 */
1070 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1071 struct se_device *dev, char *page)
1072 {
1073 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1074 return 0;
1075
1076 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1077 }
1078
1079 enum {
1080 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1081 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1082 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1083 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1084 };
1085
1086 static match_table_t tokens = {
1087 {Opt_initiator_fabric, "initiator_fabric=%s"},
1088 {Opt_initiator_node, "initiator_node=%s"},
1089 {Opt_initiator_sid, "initiator_sid=%s"},
1090 {Opt_sa_res_key, "sa_res_key=%s"},
1091 {Opt_res_holder, "res_holder=%d"},
1092 {Opt_res_type, "res_type=%d"},
1093 {Opt_res_scope, "res_scope=%d"},
1094 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1095 {Opt_mapped_lun, "mapped_lun=%d"},
1096 {Opt_target_fabric, "target_fabric=%s"},
1097 {Opt_target_node, "target_node=%s"},
1098 {Opt_tpgt, "tpgt=%d"},
1099 {Opt_port_rtpi, "port_rtpi=%d"},
1100 {Opt_target_lun, "target_lun=%d"},
1101 {Opt_err, NULL}
1102 };
1103
1104 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1105 struct se_device *dev,
1106 const char *page,
1107 size_t count)
1108 {
1109 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1110 unsigned char *t_fabric = NULL, *t_port = NULL;
1111 char *orig, *ptr, *opts;
1112 substring_t args[MAX_OPT_ARGS];
1113 unsigned long long tmp_ll;
1114 u64 sa_res_key = 0;
1115 u32 mapped_lun = 0, target_lun = 0;
1116 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1117 u16 port_rpti = 0, tpgt = 0;
1118 u8 type = 0, scope;
1119
1120 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1121 return 0;
1122 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1123 return 0;
1124
1125 if (dev->export_count) {
1126 pr_debug("Unable to process APTPL metadata while"
1127 " active fabric exports exist\n");
1128 return -EINVAL;
1129 }
1130
1131 opts = kstrdup(page, GFP_KERNEL);
1132 if (!opts)
1133 return -ENOMEM;
1134
1135 orig = opts;
1136 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1137 if (!*ptr)
1138 continue;
1139
1140 token = match_token(ptr, tokens, args);
1141 switch (token) {
1142 case Opt_initiator_fabric:
1143 i_fabric = match_strdup(args);
1144 if (!i_fabric) {
1145 ret = -ENOMEM;
1146 goto out;
1147 }
1148 break;
1149 case Opt_initiator_node:
1150 i_port = match_strdup(args);
1151 if (!i_port) {
1152 ret = -ENOMEM;
1153 goto out;
1154 }
1155 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1156 pr_err("APTPL metadata initiator_node="
1157 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1158 PR_APTPL_MAX_IPORT_LEN);
1159 ret = -EINVAL;
1160 break;
1161 }
1162 break;
1163 case Opt_initiator_sid:
1164 isid = match_strdup(args);
1165 if (!isid) {
1166 ret = -ENOMEM;
1167 goto out;
1168 }
1169 if (strlen(isid) >= PR_REG_ISID_LEN) {
1170 pr_err("APTPL metadata initiator_isid"
1171 "= exceeds PR_REG_ISID_LEN: %d\n",
1172 PR_REG_ISID_LEN);
1173 ret = -EINVAL;
1174 break;
1175 }
1176 break;
1177 case Opt_sa_res_key:
1178 ret = kstrtoull(args->from, 0, &tmp_ll);
1179 if (ret < 0) {
1180 pr_err("kstrtoull() failed for sa_res_key=\n");
1181 goto out;
1182 }
1183 sa_res_key = (u64)tmp_ll;
1184 break;
1185 /*
1186 * PR APTPL Metadata for Reservation
1187 */
1188 case Opt_res_holder:
1189 match_int(args, &arg);
1190 res_holder = arg;
1191 break;
1192 case Opt_res_type:
1193 match_int(args, &arg);
1194 type = (u8)arg;
1195 break;
1196 case Opt_res_scope:
1197 match_int(args, &arg);
1198 scope = (u8)arg;
1199 break;
1200 case Opt_res_all_tg_pt:
1201 match_int(args, &arg);
1202 all_tg_pt = (int)arg;
1203 break;
1204 case Opt_mapped_lun:
1205 match_int(args, &arg);
1206 mapped_lun = (u32)arg;
1207 break;
1208 /*
1209 * PR APTPL Metadata for Target Port
1210 */
1211 case Opt_target_fabric:
1212 t_fabric = match_strdup(args);
1213 if (!t_fabric) {
1214 ret = -ENOMEM;
1215 goto out;
1216 }
1217 break;
1218 case Opt_target_node:
1219 t_port = match_strdup(args);
1220 if (!t_port) {
1221 ret = -ENOMEM;
1222 goto out;
1223 }
1224 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1225 pr_err("APTPL metadata target_node="
1226 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1227 PR_APTPL_MAX_TPORT_LEN);
1228 ret = -EINVAL;
1229 break;
1230 }
1231 break;
1232 case Opt_tpgt:
1233 match_int(args, &arg);
1234 tpgt = (u16)arg;
1235 break;
1236 case Opt_port_rtpi:
1237 match_int(args, &arg);
1238 port_rpti = (u16)arg;
1239 break;
1240 case Opt_target_lun:
1241 match_int(args, &arg);
1242 target_lun = (u32)arg;
1243 break;
1244 default:
1245 break;
1246 }
1247 }
1248
1249 if (!i_port || !t_port || !sa_res_key) {
1250 pr_err("Illegal parameters for APTPL registration\n");
1251 ret = -EINVAL;
1252 goto out;
1253 }
1254
1255 if (res_holder && !(type)) {
1256 pr_err("Illegal PR type: 0x%02x for reservation"
1257 " holder\n", type);
1258 ret = -EINVAL;
1259 goto out;
1260 }
1261
1262 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1263 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1264 res_holder, all_tg_pt, type);
1265 out:
1266 kfree(i_fabric);
1267 kfree(i_port);
1268 kfree(isid);
1269 kfree(t_fabric);
1270 kfree(t_port);
1271 kfree(orig);
1272 return (ret == 0) ? count : ret;
1273 }
1274
1275 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1276
1277 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1278
1279 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1280 &target_core_dev_pr_res_holder.attr,
1281 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1282 &target_core_dev_pr_res_pr_generation.attr,
1283 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1284 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1285 &target_core_dev_pr_res_pr_type.attr,
1286 &target_core_dev_pr_res_type.attr,
1287 &target_core_dev_pr_res_aptpl_active.attr,
1288 &target_core_dev_pr_res_aptpl_metadata.attr,
1289 NULL,
1290 };
1291
1292 static struct configfs_item_operations target_core_dev_pr_ops = {
1293 .show_attribute = target_core_dev_pr_attr_show,
1294 .store_attribute = target_core_dev_pr_attr_store,
1295 };
1296
1297 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1298
1299 /* End functions for struct config_item_type tb_dev_pr_cit */
1300
1301 /* Start functions for struct config_item_type tb_dev_cit */
1302
1303 static ssize_t target_core_show_dev_info(void *p, char *page)
1304 {
1305 struct se_device *dev = p;
1306 struct se_subsystem_api *t = dev->transport;
1307 int bl = 0;
1308 ssize_t read_bytes = 0;
1309
1310 transport_dump_dev_state(dev, page, &bl);
1311 read_bytes += bl;
1312 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1313 return read_bytes;
1314 }
1315
1316 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1317 .attr = { .ca_owner = THIS_MODULE,
1318 .ca_name = "info",
1319 .ca_mode = S_IRUGO },
1320 .show = target_core_show_dev_info,
1321 .store = NULL,
1322 };
1323
1324 static ssize_t target_core_store_dev_control(
1325 void *p,
1326 const char *page,
1327 size_t count)
1328 {
1329 struct se_device *dev = p;
1330 struct se_subsystem_api *t = dev->transport;
1331
1332 return t->set_configfs_dev_params(dev, page, count);
1333 }
1334
1335 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1336 .attr = { .ca_owner = THIS_MODULE,
1337 .ca_name = "control",
1338 .ca_mode = S_IWUSR },
1339 .show = NULL,
1340 .store = target_core_store_dev_control,
1341 };
1342
1343 static ssize_t target_core_show_dev_alias(void *p, char *page)
1344 {
1345 struct se_device *dev = p;
1346
1347 if (!(dev->dev_flags & DF_USING_ALIAS))
1348 return 0;
1349
1350 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1351 }
1352
1353 static ssize_t target_core_store_dev_alias(
1354 void *p,
1355 const char *page,
1356 size_t count)
1357 {
1358 struct se_device *dev = p;
1359 struct se_hba *hba = dev->se_hba;
1360 ssize_t read_bytes;
1361
1362 if (count > (SE_DEV_ALIAS_LEN-1)) {
1363 pr_err("alias count: %d exceeds"
1364 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1365 SE_DEV_ALIAS_LEN-1);
1366 return -EINVAL;
1367 }
1368
1369 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1370 if (!read_bytes)
1371 return -EINVAL;
1372 if (dev->dev_alias[read_bytes - 1] == '\n')
1373 dev->dev_alias[read_bytes - 1] = '\0';
1374
1375 dev->dev_flags |= DF_USING_ALIAS;
1376
1377 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1378 config_item_name(&hba->hba_group.cg_item),
1379 config_item_name(&dev->dev_group.cg_item),
1380 dev->dev_alias);
1381
1382 return read_bytes;
1383 }
1384
1385 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1386 .attr = { .ca_owner = THIS_MODULE,
1387 .ca_name = "alias",
1388 .ca_mode = S_IRUGO | S_IWUSR },
1389 .show = target_core_show_dev_alias,
1390 .store = target_core_store_dev_alias,
1391 };
1392
1393 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1394 {
1395 struct se_device *dev = p;
1396
1397 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1398 return 0;
1399
1400 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1401 }
1402
1403 static ssize_t target_core_store_dev_udev_path(
1404 void *p,
1405 const char *page,
1406 size_t count)
1407 {
1408 struct se_device *dev = p;
1409 struct se_hba *hba = dev->se_hba;
1410 ssize_t read_bytes;
1411
1412 if (count > (SE_UDEV_PATH_LEN-1)) {
1413 pr_err("udev_path count: %d exceeds"
1414 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1415 SE_UDEV_PATH_LEN-1);
1416 return -EINVAL;
1417 }
1418
1419 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1420 "%s", page);
1421 if (!read_bytes)
1422 return -EINVAL;
1423 if (dev->udev_path[read_bytes - 1] == '\n')
1424 dev->udev_path[read_bytes - 1] = '\0';
1425
1426 dev->dev_flags |= DF_USING_UDEV_PATH;
1427
1428 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1429 config_item_name(&hba->hba_group.cg_item),
1430 config_item_name(&dev->dev_group.cg_item),
1431 dev->udev_path);
1432
1433 return read_bytes;
1434 }
1435
1436 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1437 .attr = { .ca_owner = THIS_MODULE,
1438 .ca_name = "udev_path",
1439 .ca_mode = S_IRUGO | S_IWUSR },
1440 .show = target_core_show_dev_udev_path,
1441 .store = target_core_store_dev_udev_path,
1442 };
1443
1444 static ssize_t target_core_show_dev_enable(void *p, char *page)
1445 {
1446 struct se_device *dev = p;
1447
1448 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1449 }
1450
1451 static ssize_t target_core_store_dev_enable(
1452 void *p,
1453 const char *page,
1454 size_t count)
1455 {
1456 struct se_device *dev = p;
1457 char *ptr;
1458 int ret;
1459
1460 ptr = strstr(page, "1");
1461 if (!ptr) {
1462 pr_err("For dev_enable ops, only valid value"
1463 " is \"1\"\n");
1464 return -EINVAL;
1465 }
1466
1467 ret = target_configure_device(dev);
1468 if (ret)
1469 return ret;
1470 return count;
1471 }
1472
1473 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1474 .attr = { .ca_owner = THIS_MODULE,
1475 .ca_name = "enable",
1476 .ca_mode = S_IRUGO | S_IWUSR },
1477 .show = target_core_show_dev_enable,
1478 .store = target_core_store_dev_enable,
1479 };
1480
1481 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1482 {
1483 struct se_device *dev = p;
1484 struct config_item *lu_ci;
1485 struct t10_alua_lu_gp *lu_gp;
1486 struct t10_alua_lu_gp_member *lu_gp_mem;
1487 ssize_t len = 0;
1488
1489 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1490 if (!lu_gp_mem)
1491 return 0;
1492
1493 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1494 lu_gp = lu_gp_mem->lu_gp;
1495 if (lu_gp) {
1496 lu_ci = &lu_gp->lu_gp_group.cg_item;
1497 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1498 config_item_name(lu_ci), lu_gp->lu_gp_id);
1499 }
1500 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1501
1502 return len;
1503 }
1504
1505 static ssize_t target_core_store_alua_lu_gp(
1506 void *p,
1507 const char *page,
1508 size_t count)
1509 {
1510 struct se_device *dev = p;
1511 struct se_hba *hba = dev->se_hba;
1512 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1513 struct t10_alua_lu_gp_member *lu_gp_mem;
1514 unsigned char buf[LU_GROUP_NAME_BUF];
1515 int move = 0;
1516
1517 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1518 if (!lu_gp_mem)
1519 return 0;
1520
1521 if (count > LU_GROUP_NAME_BUF) {
1522 pr_err("ALUA LU Group Alias too large!\n");
1523 return -EINVAL;
1524 }
1525 memset(buf, 0, LU_GROUP_NAME_BUF);
1526 memcpy(buf, page, count);
1527 /*
1528 * Any ALUA logical unit alias besides "NULL" means we will be
1529 * making a new group association.
1530 */
1531 if (strcmp(strstrip(buf), "NULL")) {
1532 /*
1533 * core_alua_get_lu_gp_by_name() will increment reference to
1534 * struct t10_alua_lu_gp. This reference is released with
1535 * core_alua_get_lu_gp_by_name below().
1536 */
1537 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1538 if (!lu_gp_new)
1539 return -ENODEV;
1540 }
1541
1542 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1543 lu_gp = lu_gp_mem->lu_gp;
1544 if (lu_gp) {
1545 /*
1546 * Clearing an existing lu_gp association, and replacing
1547 * with NULL
1548 */
1549 if (!lu_gp_new) {
1550 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1551 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1552 " %hu\n",
1553 config_item_name(&hba->hba_group.cg_item),
1554 config_item_name(&dev->dev_group.cg_item),
1555 config_item_name(&lu_gp->lu_gp_group.cg_item),
1556 lu_gp->lu_gp_id);
1557
1558 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1559 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1560
1561 return count;
1562 }
1563 /*
1564 * Removing existing association of lu_gp_mem with lu_gp
1565 */
1566 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1567 move = 1;
1568 }
1569 /*
1570 * Associate lu_gp_mem with lu_gp_new.
1571 */
1572 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1573 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1574
1575 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1576 " core/alua/lu_gps/%s, ID: %hu\n",
1577 (move) ? "Moving" : "Adding",
1578 config_item_name(&hba->hba_group.cg_item),
1579 config_item_name(&dev->dev_group.cg_item),
1580 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1581 lu_gp_new->lu_gp_id);
1582
1583 core_alua_put_lu_gp_from_name(lu_gp_new);
1584 return count;
1585 }
1586
1587 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1588 .attr = { .ca_owner = THIS_MODULE,
1589 .ca_name = "alua_lu_gp",
1590 .ca_mode = S_IRUGO | S_IWUSR },
1591 .show = target_core_show_alua_lu_gp,
1592 .store = target_core_store_alua_lu_gp,
1593 };
1594
1595 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1596 {
1597 struct se_device *dev = p;
1598 struct t10_alua_lba_map *map;
1599 struct t10_alua_lba_map_member *mem;
1600 char *b = page;
1601 int bl = 0;
1602 char state;
1603
1604 spin_lock(&dev->t10_alua.lba_map_lock);
1605 if (!list_empty(&dev->t10_alua.lba_map_list))
1606 bl += sprintf(b + bl, "%u %u\n",
1607 dev->t10_alua.lba_map_segment_size,
1608 dev->t10_alua.lba_map_segment_multiplier);
1609 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1610 bl += sprintf(b + bl, "%llu %llu",
1611 map->lba_map_first_lba, map->lba_map_last_lba);
1612 list_for_each_entry(mem, &map->lba_map_mem_list,
1613 lba_map_mem_list) {
1614 switch (mem->lba_map_mem_alua_state) {
1615 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1616 state = 'O';
1617 break;
1618 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1619 state = 'A';
1620 break;
1621 case ALUA_ACCESS_STATE_STANDBY:
1622 state = 'S';
1623 break;
1624 case ALUA_ACCESS_STATE_UNAVAILABLE:
1625 state = 'U';
1626 break;
1627 default:
1628 state = '.';
1629 break;
1630 }
1631 bl += sprintf(b + bl, " %d:%c",
1632 mem->lba_map_mem_alua_pg_id, state);
1633 }
1634 bl += sprintf(b + bl, "\n");
1635 }
1636 spin_unlock(&dev->t10_alua.lba_map_lock);
1637 return bl;
1638 }
1639
1640 static ssize_t target_core_store_dev_lba_map(
1641 void *p,
1642 const char *page,
1643 size_t count)
1644 {
1645 struct se_device *dev = p;
1646 struct t10_alua_lba_map *lba_map = NULL;
1647 struct list_head lba_list;
1648 char *map_entries, *ptr;
1649 char state;
1650 int pg_num = -1, pg;
1651 int ret = 0, num = 0, pg_id, alua_state;
1652 unsigned long start_lba = -1, end_lba = -1;
1653 unsigned long segment_size = -1, segment_mult = -1;
1654
1655 map_entries = kstrdup(page, GFP_KERNEL);
1656 if (!map_entries)
1657 return -ENOMEM;
1658
1659 INIT_LIST_HEAD(&lba_list);
1660 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1661 if (!*ptr)
1662 continue;
1663
1664 if (num == 0) {
1665 if (sscanf(ptr, "%lu %lu\n",
1666 &segment_size, &segment_mult) != 2) {
1667 pr_err("Invalid line %d\n", num);
1668 ret = -EINVAL;
1669 break;
1670 }
1671 num++;
1672 continue;
1673 }
1674 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1675 pr_err("Invalid line %d\n", num);
1676 ret = -EINVAL;
1677 break;
1678 }
1679 ptr = strchr(ptr, ' ');
1680 if (!ptr) {
1681 pr_err("Invalid line %d, missing end lba\n", num);
1682 ret = -EINVAL;
1683 break;
1684 }
1685 ptr++;
1686 ptr = strchr(ptr, ' ');
1687 if (!ptr) {
1688 pr_err("Invalid line %d, missing state definitions\n",
1689 num);
1690 ret = -EINVAL;
1691 break;
1692 }
1693 ptr++;
1694 lba_map = core_alua_allocate_lba_map(&lba_list,
1695 start_lba, end_lba);
1696 if (IS_ERR(lba_map)) {
1697 ret = PTR_ERR(lba_map);
1698 break;
1699 }
1700 pg = 0;
1701 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1702 switch (state) {
1703 case 'O':
1704 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1705 break;
1706 case 'A':
1707 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1708 break;
1709 case 'S':
1710 alua_state = ALUA_ACCESS_STATE_STANDBY;
1711 break;
1712 case 'U':
1713 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1714 break;
1715 default:
1716 pr_err("Invalid ALUA state '%c'\n", state);
1717 ret = -EINVAL;
1718 goto out;
1719 }
1720
1721 ret = core_alua_allocate_lba_map_mem(lba_map,
1722 pg_id, alua_state);
1723 if (ret) {
1724 pr_err("Invalid target descriptor %d:%c "
1725 "at line %d\n",
1726 pg_id, state, num);
1727 break;
1728 }
1729 pg++;
1730 ptr = strchr(ptr, ' ');
1731 if (ptr)
1732 ptr++;
1733 else
1734 break;
1735 }
1736 if (pg_num == -1)
1737 pg_num = pg;
1738 else if (pg != pg_num) {
1739 pr_err("Only %d from %d port groups definitions "
1740 "at line %d\n", pg, pg_num, num);
1741 ret = -EINVAL;
1742 break;
1743 }
1744 num++;
1745 }
1746 out:
1747 if (ret) {
1748 core_alua_free_lba_map(&lba_list);
1749 count = ret;
1750 } else
1751 core_alua_set_lba_map(dev, &lba_list,
1752 segment_size, segment_mult);
1753 kfree(map_entries);
1754 return count;
1755 }
1756
1757 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1758 .attr = { .ca_owner = THIS_MODULE,
1759 .ca_name = "lba_map",
1760 .ca_mode = S_IRUGO | S_IWUSR },
1761 .show = target_core_show_dev_lba_map,
1762 .store = target_core_store_dev_lba_map,
1763 };
1764
1765 static struct configfs_attribute *target_core_dev_attrs[] = {
1766 &target_core_attr_dev_info.attr,
1767 &target_core_attr_dev_control.attr,
1768 &target_core_attr_dev_alias.attr,
1769 &target_core_attr_dev_udev_path.attr,
1770 &target_core_attr_dev_enable.attr,
1771 &target_core_attr_dev_alua_lu_gp.attr,
1772 &target_core_attr_dev_lba_map.attr,
1773 NULL,
1774 };
1775
1776 static void target_core_dev_release(struct config_item *item)
1777 {
1778 struct config_group *dev_cg = to_config_group(item);
1779 struct se_device *dev =
1780 container_of(dev_cg, struct se_device, dev_group);
1781
1782 kfree(dev_cg->default_groups);
1783 target_free_device(dev);
1784 }
1785
1786 static ssize_t target_core_dev_show(struct config_item *item,
1787 struct configfs_attribute *attr,
1788 char *page)
1789 {
1790 struct config_group *dev_cg = to_config_group(item);
1791 struct se_device *dev =
1792 container_of(dev_cg, struct se_device, dev_group);
1793 struct target_core_configfs_attribute *tc_attr = container_of(
1794 attr, struct target_core_configfs_attribute, attr);
1795
1796 if (!tc_attr->show)
1797 return -EINVAL;
1798
1799 return tc_attr->show(dev, page);
1800 }
1801
1802 static ssize_t target_core_dev_store(struct config_item *item,
1803 struct configfs_attribute *attr,
1804 const char *page, size_t count)
1805 {
1806 struct config_group *dev_cg = to_config_group(item);
1807 struct se_device *dev =
1808 container_of(dev_cg, struct se_device, dev_group);
1809 struct target_core_configfs_attribute *tc_attr = container_of(
1810 attr, struct target_core_configfs_attribute, attr);
1811
1812 if (!tc_attr->store)
1813 return -EINVAL;
1814
1815 return tc_attr->store(dev, page, count);
1816 }
1817
1818 static struct configfs_item_operations target_core_dev_item_ops = {
1819 .release = target_core_dev_release,
1820 .show_attribute = target_core_dev_show,
1821 .store_attribute = target_core_dev_store,
1822 };
1823
1824 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
1825
1826 /* End functions for struct config_item_type tb_dev_cit */
1827
1828 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1829
1830 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1831 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1832 static struct target_core_alua_lu_gp_attribute \
1833 target_core_alua_lu_gp_##_name = \
1834 __CONFIGFS_EATTR(_name, _mode, \
1835 target_core_alua_lu_gp_show_attr_##_name, \
1836 target_core_alua_lu_gp_store_attr_##_name);
1837
1838 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1839 static struct target_core_alua_lu_gp_attribute \
1840 target_core_alua_lu_gp_##_name = \
1841 __CONFIGFS_EATTR_RO(_name, \
1842 target_core_alua_lu_gp_show_attr_##_name);
1843
1844 /*
1845 * lu_gp_id
1846 */
1847 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1848 struct t10_alua_lu_gp *lu_gp,
1849 char *page)
1850 {
1851 if (!lu_gp->lu_gp_valid_id)
1852 return 0;
1853
1854 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1855 }
1856
1857 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1858 struct t10_alua_lu_gp *lu_gp,
1859 const char *page,
1860 size_t count)
1861 {
1862 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1863 unsigned long lu_gp_id;
1864 int ret;
1865
1866 ret = kstrtoul(page, 0, &lu_gp_id);
1867 if (ret < 0) {
1868 pr_err("kstrtoul() returned %d for"
1869 " lu_gp_id\n", ret);
1870 return ret;
1871 }
1872 if (lu_gp_id > 0x0000ffff) {
1873 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1874 " 0x0000ffff\n", lu_gp_id);
1875 return -EINVAL;
1876 }
1877
1878 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1879 if (ret < 0)
1880 return -EINVAL;
1881
1882 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1883 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1884 config_item_name(&alua_lu_gp_cg->cg_item),
1885 lu_gp->lu_gp_id);
1886
1887 return count;
1888 }
1889
1890 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1891
1892 /*
1893 * members
1894 */
1895 static ssize_t target_core_alua_lu_gp_show_attr_members(
1896 struct t10_alua_lu_gp *lu_gp,
1897 char *page)
1898 {
1899 struct se_device *dev;
1900 struct se_hba *hba;
1901 struct t10_alua_lu_gp_member *lu_gp_mem;
1902 ssize_t len = 0, cur_len;
1903 unsigned char buf[LU_GROUP_NAME_BUF];
1904
1905 memset(buf, 0, LU_GROUP_NAME_BUF);
1906
1907 spin_lock(&lu_gp->lu_gp_lock);
1908 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1909 dev = lu_gp_mem->lu_gp_mem_dev;
1910 hba = dev->se_hba;
1911
1912 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1913 config_item_name(&hba->hba_group.cg_item),
1914 config_item_name(&dev->dev_group.cg_item));
1915 cur_len++; /* Extra byte for NULL terminator */
1916
1917 if ((cur_len + len) > PAGE_SIZE) {
1918 pr_warn("Ran out of lu_gp_show_attr"
1919 "_members buffer\n");
1920 break;
1921 }
1922 memcpy(page+len, buf, cur_len);
1923 len += cur_len;
1924 }
1925 spin_unlock(&lu_gp->lu_gp_lock);
1926
1927 return len;
1928 }
1929
1930 SE_DEV_ALUA_LU_ATTR_RO(members);
1931
1932 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1933
1934 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1935 &target_core_alua_lu_gp_lu_gp_id.attr,
1936 &target_core_alua_lu_gp_members.attr,
1937 NULL,
1938 };
1939
1940 static void target_core_alua_lu_gp_release(struct config_item *item)
1941 {
1942 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1943 struct t10_alua_lu_gp, lu_gp_group);
1944
1945 core_alua_free_lu_gp(lu_gp);
1946 }
1947
1948 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1949 .release = target_core_alua_lu_gp_release,
1950 .show_attribute = target_core_alua_lu_gp_attr_show,
1951 .store_attribute = target_core_alua_lu_gp_attr_store,
1952 };
1953
1954 static struct config_item_type target_core_alua_lu_gp_cit = {
1955 .ct_item_ops = &target_core_alua_lu_gp_ops,
1956 .ct_attrs = target_core_alua_lu_gp_attrs,
1957 .ct_owner = THIS_MODULE,
1958 };
1959
1960 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1961
1962 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1963
1964 static struct config_group *target_core_alua_create_lu_gp(
1965 struct config_group *group,
1966 const char *name)
1967 {
1968 struct t10_alua_lu_gp *lu_gp;
1969 struct config_group *alua_lu_gp_cg = NULL;
1970 struct config_item *alua_lu_gp_ci = NULL;
1971
1972 lu_gp = core_alua_allocate_lu_gp(name, 0);
1973 if (IS_ERR(lu_gp))
1974 return NULL;
1975
1976 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1977 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1978
1979 config_group_init_type_name(alua_lu_gp_cg, name,
1980 &target_core_alua_lu_gp_cit);
1981
1982 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1983 " Group: core/alua/lu_gps/%s\n",
1984 config_item_name(alua_lu_gp_ci));
1985
1986 return alua_lu_gp_cg;
1987
1988 }
1989
1990 static void target_core_alua_drop_lu_gp(
1991 struct config_group *group,
1992 struct config_item *item)
1993 {
1994 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1995 struct t10_alua_lu_gp, lu_gp_group);
1996
1997 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1998 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1999 config_item_name(item), lu_gp->lu_gp_id);
2000 /*
2001 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2002 * -> target_core_alua_lu_gp_release()
2003 */
2004 config_item_put(item);
2005 }
2006
2007 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2008 .make_group = &target_core_alua_create_lu_gp,
2009 .drop_item = &target_core_alua_drop_lu_gp,
2010 };
2011
2012 static struct config_item_type target_core_alua_lu_gps_cit = {
2013 .ct_item_ops = NULL,
2014 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2015 .ct_owner = THIS_MODULE,
2016 };
2017
2018 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2019
2020 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2021
2022 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2023 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2024 static struct target_core_alua_tg_pt_gp_attribute \
2025 target_core_alua_tg_pt_gp_##_name = \
2026 __CONFIGFS_EATTR(_name, _mode, \
2027 target_core_alua_tg_pt_gp_show_attr_##_name, \
2028 target_core_alua_tg_pt_gp_store_attr_##_name);
2029
2030 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2031 static struct target_core_alua_tg_pt_gp_attribute \
2032 target_core_alua_tg_pt_gp_##_name = \
2033 __CONFIGFS_EATTR_RO(_name, \
2034 target_core_alua_tg_pt_gp_show_attr_##_name);
2035
2036 /*
2037 * alua_access_state
2038 */
2039 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2040 struct t10_alua_tg_pt_gp *tg_pt_gp,
2041 char *page)
2042 {
2043 return sprintf(page, "%d\n",
2044 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2045 }
2046
2047 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2048 struct t10_alua_tg_pt_gp *tg_pt_gp,
2049 const char *page,
2050 size_t count)
2051 {
2052 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2053 unsigned long tmp;
2054 int new_state, ret;
2055
2056 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2057 pr_err("Unable to do implicit ALUA on non valid"
2058 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2059 return -EINVAL;
2060 }
2061 if (!(dev->dev_flags & DF_CONFIGURED)) {
2062 pr_err("Unable to set alua_access_state while device is"
2063 " not configured\n");
2064 return -ENODEV;
2065 }
2066
2067 ret = kstrtoul(page, 0, &tmp);
2068 if (ret < 0) {
2069 pr_err("Unable to extract new ALUA access state from"
2070 " %s\n", page);
2071 return ret;
2072 }
2073 new_state = (int)tmp;
2074
2075 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2076 pr_err("Unable to process implicit configfs ALUA"
2077 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2078 return -EINVAL;
2079 }
2080 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2081 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2082 /* LBA DEPENDENT is only allowed with implicit ALUA */
2083 pr_err("Unable to process implicit configfs ALUA transition"
2084 " while explicit ALUA management is enabled\n");
2085 return -EINVAL;
2086 }
2087
2088 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2089 NULL, NULL, new_state, 0);
2090 return (!ret) ? count : -EINVAL;
2091 }
2092
2093 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2094
2095 /*
2096 * alua_access_status
2097 */
2098 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2099 struct t10_alua_tg_pt_gp *tg_pt_gp,
2100 char *page)
2101 {
2102 return sprintf(page, "%s\n",
2103 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2104 }
2105
2106 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2107 struct t10_alua_tg_pt_gp *tg_pt_gp,
2108 const char *page,
2109 size_t count)
2110 {
2111 unsigned long tmp;
2112 int new_status, ret;
2113
2114 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2115 pr_err("Unable to do set ALUA access status on non"
2116 " valid tg_pt_gp ID: %hu\n",
2117 tg_pt_gp->tg_pt_gp_valid_id);
2118 return -EINVAL;
2119 }
2120
2121 ret = kstrtoul(page, 0, &tmp);
2122 if (ret < 0) {
2123 pr_err("Unable to extract new ALUA access status"
2124 " from %s\n", page);
2125 return ret;
2126 }
2127 new_status = (int)tmp;
2128
2129 if ((new_status != ALUA_STATUS_NONE) &&
2130 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2131 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2132 pr_err("Illegal ALUA access status: 0x%02x\n",
2133 new_status);
2134 return -EINVAL;
2135 }
2136
2137 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2138 return count;
2139 }
2140
2141 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2142
2143 /*
2144 * alua_access_type
2145 */
2146 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2147 struct t10_alua_tg_pt_gp *tg_pt_gp,
2148 char *page)
2149 {
2150 return core_alua_show_access_type(tg_pt_gp, page);
2151 }
2152
2153 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2154 struct t10_alua_tg_pt_gp *tg_pt_gp,
2155 const char *page,
2156 size_t count)
2157 {
2158 return core_alua_store_access_type(tg_pt_gp, page, count);
2159 }
2160
2161 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2162
2163 /*
2164 * alua_supported_states
2165 */
2166
2167 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2168 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2169 struct t10_alua_tg_pt_gp *t, char *p) \
2170 { \
2171 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2172 }
2173
2174 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2175 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2176 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2177 { \
2178 unsigned long tmp; \
2179 int ret; \
2180 \
2181 if (!t->tg_pt_gp_valid_id) { \
2182 pr_err("Unable to do set ##_name ALUA state on non" \
2183 " valid tg_pt_gp ID: %hu\n", \
2184 t->tg_pt_gp_valid_id); \
2185 return -EINVAL; \
2186 } \
2187 \
2188 ret = kstrtoul(p, 0, &tmp); \
2189 if (ret < 0) { \
2190 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2191 return -EINVAL; \
2192 } \
2193 if (tmp > 1) { \
2194 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2195 return -EINVAL; \
2196 } \
2197 if (tmp) \
2198 t->_var |= _bit; \
2199 else \
2200 t->_var &= ~_bit; \
2201 \
2202 return c; \
2203 }
2204
2205 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2206 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2207 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2208 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2209 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2210
2211 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2212 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2213 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2214 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2215 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2216
2217 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2218 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2219 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2220 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2221 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2222
2223 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2224 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2225 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2226 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2227 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2228
2229 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2230 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2231 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2232 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2233 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2234
2235 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2236 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2237 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2238 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2239 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2240
2241 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2242 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2243 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2244 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2245 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2246
2247 /*
2248 * alua_write_metadata
2249 */
2250 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2251 struct t10_alua_tg_pt_gp *tg_pt_gp,
2252 char *page)
2253 {
2254 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2255 }
2256
2257 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2258 struct t10_alua_tg_pt_gp *tg_pt_gp,
2259 const char *page,
2260 size_t count)
2261 {
2262 unsigned long tmp;
2263 int ret;
2264
2265 ret = kstrtoul(page, 0, &tmp);
2266 if (ret < 0) {
2267 pr_err("Unable to extract alua_write_metadata\n");
2268 return ret;
2269 }
2270
2271 if ((tmp != 0) && (tmp != 1)) {
2272 pr_err("Illegal value for alua_write_metadata:"
2273 " %lu\n", tmp);
2274 return -EINVAL;
2275 }
2276 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2277
2278 return count;
2279 }
2280
2281 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2282
2283
2284
2285 /*
2286 * nonop_delay_msecs
2287 */
2288 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2289 struct t10_alua_tg_pt_gp *tg_pt_gp,
2290 char *page)
2291 {
2292 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2293
2294 }
2295
2296 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2297 struct t10_alua_tg_pt_gp *tg_pt_gp,
2298 const char *page,
2299 size_t count)
2300 {
2301 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2302 }
2303
2304 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2305
2306 /*
2307 * trans_delay_msecs
2308 */
2309 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2310 struct t10_alua_tg_pt_gp *tg_pt_gp,
2311 char *page)
2312 {
2313 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2314 }
2315
2316 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2317 struct t10_alua_tg_pt_gp *tg_pt_gp,
2318 const char *page,
2319 size_t count)
2320 {
2321 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2322 }
2323
2324 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2325
2326 /*
2327 * implicit_trans_secs
2328 */
2329 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2330 struct t10_alua_tg_pt_gp *tg_pt_gp,
2331 char *page)
2332 {
2333 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2334 }
2335
2336 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2337 struct t10_alua_tg_pt_gp *tg_pt_gp,
2338 const char *page,
2339 size_t count)
2340 {
2341 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2342 }
2343
2344 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2345
2346 /*
2347 * preferred
2348 */
2349
2350 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2351 struct t10_alua_tg_pt_gp *tg_pt_gp,
2352 char *page)
2353 {
2354 return core_alua_show_preferred_bit(tg_pt_gp, page);
2355 }
2356
2357 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2358 struct t10_alua_tg_pt_gp *tg_pt_gp,
2359 const char *page,
2360 size_t count)
2361 {
2362 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2363 }
2364
2365 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2366
2367 /*
2368 * tg_pt_gp_id
2369 */
2370 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2371 struct t10_alua_tg_pt_gp *tg_pt_gp,
2372 char *page)
2373 {
2374 if (!tg_pt_gp->tg_pt_gp_valid_id)
2375 return 0;
2376
2377 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2378 }
2379
2380 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2381 struct t10_alua_tg_pt_gp *tg_pt_gp,
2382 const char *page,
2383 size_t count)
2384 {
2385 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2386 unsigned long tg_pt_gp_id;
2387 int ret;
2388
2389 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2390 if (ret < 0) {
2391 pr_err("kstrtoul() returned %d for"
2392 " tg_pt_gp_id\n", ret);
2393 return ret;
2394 }
2395 if (tg_pt_gp_id > 0x0000ffff) {
2396 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2397 " 0x0000ffff\n", tg_pt_gp_id);
2398 return -EINVAL;
2399 }
2400
2401 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2402 if (ret < 0)
2403 return -EINVAL;
2404
2405 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2406 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2407 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2408 tg_pt_gp->tg_pt_gp_id);
2409
2410 return count;
2411 }
2412
2413 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2414
2415 /*
2416 * members
2417 */
2418 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2419 struct t10_alua_tg_pt_gp *tg_pt_gp,
2420 char *page)
2421 {
2422 struct se_port *port;
2423 struct se_portal_group *tpg;
2424 struct se_lun *lun;
2425 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2426 ssize_t len = 0, cur_len;
2427 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2428
2429 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2430
2431 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2432 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2433 tg_pt_gp_mem_list) {
2434 port = tg_pt_gp_mem->tg_pt;
2435 tpg = port->sep_tpg;
2436 lun = port->sep_lun;
2437
2438 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2439 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2440 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2441 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2442 config_item_name(&lun->lun_group.cg_item));
2443 cur_len++; /* Extra byte for NULL terminator */
2444
2445 if ((cur_len + len) > PAGE_SIZE) {
2446 pr_warn("Ran out of lu_gp_show_attr"
2447 "_members buffer\n");
2448 break;
2449 }
2450 memcpy(page+len, buf, cur_len);
2451 len += cur_len;
2452 }
2453 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2454
2455 return len;
2456 }
2457
2458 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2459
2460 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2461 tg_pt_gp_group);
2462
2463 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2464 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2465 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2466 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2467 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2468 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2469 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2470 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2471 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2472 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2473 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2474 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2475 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2476 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2477 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2478 &target_core_alua_tg_pt_gp_preferred.attr,
2479 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2480 &target_core_alua_tg_pt_gp_members.attr,
2481 NULL,
2482 };
2483
2484 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2485 {
2486 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2487 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2488
2489 core_alua_free_tg_pt_gp(tg_pt_gp);
2490 }
2491
2492 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2493 .release = target_core_alua_tg_pt_gp_release,
2494 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2495 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2496 };
2497
2498 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2499 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2500 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2501 .ct_owner = THIS_MODULE,
2502 };
2503
2504 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2505
2506 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2507
2508 static struct config_group *target_core_alua_create_tg_pt_gp(
2509 struct config_group *group,
2510 const char *name)
2511 {
2512 struct t10_alua *alua = container_of(group, struct t10_alua,
2513 alua_tg_pt_gps_group);
2514 struct t10_alua_tg_pt_gp *tg_pt_gp;
2515 struct config_group *alua_tg_pt_gp_cg = NULL;
2516 struct config_item *alua_tg_pt_gp_ci = NULL;
2517
2518 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2519 if (!tg_pt_gp)
2520 return NULL;
2521
2522 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2523 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2524
2525 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2526 &target_core_alua_tg_pt_gp_cit);
2527
2528 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2529 " Group: alua/tg_pt_gps/%s\n",
2530 config_item_name(alua_tg_pt_gp_ci));
2531
2532 return alua_tg_pt_gp_cg;
2533 }
2534
2535 static void target_core_alua_drop_tg_pt_gp(
2536 struct config_group *group,
2537 struct config_item *item)
2538 {
2539 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2540 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2541
2542 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2543 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2544 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2545 /*
2546 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2547 * -> target_core_alua_tg_pt_gp_release().
2548 */
2549 config_item_put(item);
2550 }
2551
2552 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2553 .make_group = &target_core_alua_create_tg_pt_gp,
2554 .drop_item = &target_core_alua_drop_tg_pt_gp,
2555 };
2556
2557 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2558
2559 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2560
2561 /* Start functions for struct config_item_type target_core_alua_cit */
2562
2563 /*
2564 * target_core_alua_cit is a ConfigFS group that lives under
2565 * /sys/kernel/config/target/core/alua. There are default groups
2566 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2567 * target_core_alua_cit in target_core_init_configfs() below.
2568 */
2569 static struct config_item_type target_core_alua_cit = {
2570 .ct_item_ops = NULL,
2571 .ct_attrs = NULL,
2572 .ct_owner = THIS_MODULE,
2573 };
2574
2575 /* End functions for struct config_item_type target_core_alua_cit */
2576
2577 /* Start functions for struct config_item_type tb_dev_stat_cit */
2578
2579 static struct config_group *target_core_stat_mkdir(
2580 struct config_group *group,
2581 const char *name)
2582 {
2583 return ERR_PTR(-ENOSYS);
2584 }
2585
2586 static void target_core_stat_rmdir(
2587 struct config_group *group,
2588 struct config_item *item)
2589 {
2590 return;
2591 }
2592
2593 static struct configfs_group_operations target_core_stat_group_ops = {
2594 .make_group = &target_core_stat_mkdir,
2595 .drop_item = &target_core_stat_rmdir,
2596 };
2597
2598 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2599
2600 /* End functions for struct config_item_type tb_dev_stat_cit */
2601
2602 /* Start functions for struct config_item_type target_core_hba_cit */
2603
2604 static struct config_group *target_core_make_subdev(
2605 struct config_group *group,
2606 const char *name)
2607 {
2608 struct t10_alua_tg_pt_gp *tg_pt_gp;
2609 struct se_subsystem_api *t;
2610 struct config_item *hba_ci = &group->cg_item;
2611 struct se_hba *hba = item_to_hba(hba_ci);
2612 struct se_device *dev;
2613 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2614 struct config_group *dev_stat_grp = NULL;
2615 int errno = -ENOMEM, ret;
2616
2617 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2618 if (ret)
2619 return ERR_PTR(ret);
2620 /*
2621 * Locate the struct se_subsystem_api from parent's struct se_hba.
2622 */
2623 t = hba->transport;
2624
2625 dev = target_alloc_device(hba, name);
2626 if (!dev)
2627 goto out_unlock;
2628
2629 dev_cg = &dev->dev_group;
2630
2631 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2632 GFP_KERNEL);
2633 if (!dev_cg->default_groups)
2634 goto out_free_device;
2635
2636 config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
2637 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2638 &t->tb_cits.tb_dev_attrib_cit);
2639 config_group_init_type_name(&dev->dev_pr_group, "pr",
2640 &t->tb_cits.tb_dev_pr_cit);
2641 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2642 &t->tb_cits.tb_dev_wwn_cit);
2643 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2644 "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
2645 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2646 "statistics", &t->tb_cits.tb_dev_stat_cit);
2647
2648 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2649 dev_cg->default_groups[1] = &dev->dev_pr_group;
2650 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2651 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2652 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2653 dev_cg->default_groups[5] = NULL;
2654 /*
2655 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2656 */
2657 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2658 if (!tg_pt_gp)
2659 goto out_free_dev_cg_default_groups;
2660 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2661
2662 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2663 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2664 GFP_KERNEL);
2665 if (!tg_pt_gp_cg->default_groups) {
2666 pr_err("Unable to allocate tg_pt_gp_cg->"
2667 "default_groups\n");
2668 goto out_free_tg_pt_gp;
2669 }
2670
2671 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2672 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2673 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2674 tg_pt_gp_cg->default_groups[1] = NULL;
2675 /*
2676 * Add core/$HBA/$DEV/statistics/ default groups
2677 */
2678 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2679 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2680 GFP_KERNEL);
2681 if (!dev_stat_grp->default_groups) {
2682 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2683 goto out_free_tg_pt_gp_cg_default_groups;
2684 }
2685 target_stat_setup_dev_default_groups(dev);
2686
2687 mutex_unlock(&hba->hba_access_mutex);
2688 return dev_cg;
2689
2690 out_free_tg_pt_gp_cg_default_groups:
2691 kfree(tg_pt_gp_cg->default_groups);
2692 out_free_tg_pt_gp:
2693 core_alua_free_tg_pt_gp(tg_pt_gp);
2694 out_free_dev_cg_default_groups:
2695 kfree(dev_cg->default_groups);
2696 out_free_device:
2697 target_free_device(dev);
2698 out_unlock:
2699 mutex_unlock(&hba->hba_access_mutex);
2700 return ERR_PTR(errno);
2701 }
2702
2703 static void target_core_drop_subdev(
2704 struct config_group *group,
2705 struct config_item *item)
2706 {
2707 struct config_group *dev_cg = to_config_group(item);
2708 struct se_device *dev =
2709 container_of(dev_cg, struct se_device, dev_group);
2710 struct se_hba *hba;
2711 struct config_item *df_item;
2712 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2713 int i;
2714
2715 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2716
2717 mutex_lock(&hba->hba_access_mutex);
2718
2719 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2720 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2721 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2722 dev_stat_grp->default_groups[i] = NULL;
2723 config_item_put(df_item);
2724 }
2725 kfree(dev_stat_grp->default_groups);
2726
2727 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2728 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2729 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2730 tg_pt_gp_cg->default_groups[i] = NULL;
2731 config_item_put(df_item);
2732 }
2733 kfree(tg_pt_gp_cg->default_groups);
2734 /*
2735 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2736 * directly from target_core_alua_tg_pt_gp_release().
2737 */
2738 dev->t10_alua.default_tg_pt_gp = NULL;
2739
2740 for (i = 0; dev_cg->default_groups[i]; i++) {
2741 df_item = &dev_cg->default_groups[i]->cg_item;
2742 dev_cg->default_groups[i] = NULL;
2743 config_item_put(df_item);
2744 }
2745 /*
2746 * se_dev is released from target_core_dev_item_ops->release()
2747 */
2748 config_item_put(item);
2749 mutex_unlock(&hba->hba_access_mutex);
2750 }
2751
2752 static struct configfs_group_operations target_core_hba_group_ops = {
2753 .make_group = target_core_make_subdev,
2754 .drop_item = target_core_drop_subdev,
2755 };
2756
2757 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2758 #define SE_HBA_ATTR(_name, _mode) \
2759 static struct target_core_hba_attribute \
2760 target_core_hba_##_name = \
2761 __CONFIGFS_EATTR(_name, _mode, \
2762 target_core_hba_show_attr_##_name, \
2763 target_core_hba_store_attr_##_name);
2764
2765 #define SE_HBA_ATTR_RO(_name) \
2766 static struct target_core_hba_attribute \
2767 target_core_hba_##_name = \
2768 __CONFIGFS_EATTR_RO(_name, \
2769 target_core_hba_show_attr_##_name);
2770
2771 static ssize_t target_core_hba_show_attr_hba_info(
2772 struct se_hba *hba,
2773 char *page)
2774 {
2775 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2776 hba->hba_id, hba->transport->name,
2777 TARGET_CORE_CONFIGFS_VERSION);
2778 }
2779
2780 SE_HBA_ATTR_RO(hba_info);
2781
2782 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2783 char *page)
2784 {
2785 int hba_mode = 0;
2786
2787 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2788 hba_mode = 1;
2789
2790 return sprintf(page, "%d\n", hba_mode);
2791 }
2792
2793 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2794 const char *page, size_t count)
2795 {
2796 struct se_subsystem_api *transport = hba->transport;
2797 unsigned long mode_flag;
2798 int ret;
2799
2800 if (transport->pmode_enable_hba == NULL)
2801 return -EINVAL;
2802
2803 ret = kstrtoul(page, 0, &mode_flag);
2804 if (ret < 0) {
2805 pr_err("Unable to extract hba mode flag: %d\n", ret);
2806 return ret;
2807 }
2808
2809 if (hba->dev_count) {
2810 pr_err("Unable to set hba_mode with active devices\n");
2811 return -EINVAL;
2812 }
2813
2814 ret = transport->pmode_enable_hba(hba, mode_flag);
2815 if (ret < 0)
2816 return -EINVAL;
2817 if (ret > 0)
2818 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2819 else if (ret == 0)
2820 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2821
2822 return count;
2823 }
2824
2825 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2826
2827 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2828
2829 static void target_core_hba_release(struct config_item *item)
2830 {
2831 struct se_hba *hba = container_of(to_config_group(item),
2832 struct se_hba, hba_group);
2833 core_delete_hba(hba);
2834 }
2835
2836 static struct configfs_attribute *target_core_hba_attrs[] = {
2837 &target_core_hba_hba_info.attr,
2838 &target_core_hba_hba_mode.attr,
2839 NULL,
2840 };
2841
2842 static struct configfs_item_operations target_core_hba_item_ops = {
2843 .release = target_core_hba_release,
2844 .show_attribute = target_core_hba_attr_show,
2845 .store_attribute = target_core_hba_attr_store,
2846 };
2847
2848 static struct config_item_type target_core_hba_cit = {
2849 .ct_item_ops = &target_core_hba_item_ops,
2850 .ct_group_ops = &target_core_hba_group_ops,
2851 .ct_attrs = target_core_hba_attrs,
2852 .ct_owner = THIS_MODULE,
2853 };
2854
2855 static struct config_group *target_core_call_addhbatotarget(
2856 struct config_group *group,
2857 const char *name)
2858 {
2859 char *se_plugin_str, *str, *str2;
2860 struct se_hba *hba;
2861 char buf[TARGET_CORE_NAME_MAX_LEN];
2862 unsigned long plugin_dep_id = 0;
2863 int ret;
2864
2865 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2866 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2867 pr_err("Passed *name strlen(): %d exceeds"
2868 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2869 TARGET_CORE_NAME_MAX_LEN);
2870 return ERR_PTR(-ENAMETOOLONG);
2871 }
2872 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2873
2874 str = strstr(buf, "_");
2875 if (!str) {
2876 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2877 return ERR_PTR(-EINVAL);
2878 }
2879 se_plugin_str = buf;
2880 /*
2881 * Special case for subsystem plugins that have "_" in their names.
2882 * Namely rd_direct and rd_mcp..
2883 */
2884 str2 = strstr(str+1, "_");
2885 if (str2) {
2886 *str2 = '\0'; /* Terminate for *se_plugin_str */
2887 str2++; /* Skip to start of plugin dependent ID */
2888 str = str2;
2889 } else {
2890 *str = '\0'; /* Terminate for *se_plugin_str */
2891 str++; /* Skip to start of plugin dependent ID */
2892 }
2893
2894 ret = kstrtoul(str, 0, &plugin_dep_id);
2895 if (ret < 0) {
2896 pr_err("kstrtoul() returned %d for"
2897 " plugin_dep_id\n", ret);
2898 return ERR_PTR(ret);
2899 }
2900 /*
2901 * Load up TCM subsystem plugins if they have not already been loaded.
2902 */
2903 transport_subsystem_check_init();
2904
2905 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2906 if (IS_ERR(hba))
2907 return ERR_CAST(hba);
2908
2909 config_group_init_type_name(&hba->hba_group, name,
2910 &target_core_hba_cit);
2911
2912 return &hba->hba_group;
2913 }
2914
2915 static void target_core_call_delhbafromtarget(
2916 struct config_group *group,
2917 struct config_item *item)
2918 {
2919 /*
2920 * core_delete_hba() is called from target_core_hba_item_ops->release()
2921 * -> target_core_hba_release()
2922 */
2923 config_item_put(item);
2924 }
2925
2926 static struct configfs_group_operations target_core_group_ops = {
2927 .make_group = target_core_call_addhbatotarget,
2928 .drop_item = target_core_call_delhbafromtarget,
2929 };
2930
2931 static struct config_item_type target_core_cit = {
2932 .ct_item_ops = NULL,
2933 .ct_group_ops = &target_core_group_ops,
2934 .ct_attrs = NULL,
2935 .ct_owner = THIS_MODULE,
2936 };
2937
2938 /* Stop functions for struct config_item_type target_core_hba_cit */
2939
2940 void target_core_setup_sub_cits(struct se_subsystem_api *sa)
2941 {
2942 target_core_setup_dev_cit(sa);
2943 target_core_setup_dev_attrib_cit(sa);
2944 target_core_setup_dev_pr_cit(sa);
2945 target_core_setup_dev_wwn_cit(sa);
2946 target_core_setup_dev_alua_tg_pt_gps_cit(sa);
2947 target_core_setup_dev_stat_cit(sa);
2948 }
2949 EXPORT_SYMBOL(target_core_setup_sub_cits);
2950
2951 static int __init target_core_init_configfs(void)
2952 {
2953 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2954 struct config_group *lu_gp_cg = NULL;
2955 struct configfs_subsystem *subsys;
2956 struct t10_alua_lu_gp *lu_gp;
2957 int ret;
2958
2959 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2960 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2961 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2962
2963 subsys = target_core_subsystem[0];
2964 config_group_init(&subsys->su_group);
2965 mutex_init(&subsys->su_mutex);
2966
2967 ret = init_se_kmem_caches();
2968 if (ret < 0)
2969 return ret;
2970 /*
2971 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2972 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2973 */
2974 target_cg = &subsys->su_group;
2975 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2976 GFP_KERNEL);
2977 if (!target_cg->default_groups) {
2978 pr_err("Unable to allocate target_cg->default_groups\n");
2979 ret = -ENOMEM;
2980 goto out_global;
2981 }
2982
2983 config_group_init_type_name(&target_core_hbagroup,
2984 "core", &target_core_cit);
2985 target_cg->default_groups[0] = &target_core_hbagroup;
2986 target_cg->default_groups[1] = NULL;
2987 /*
2988 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2989 */
2990 hba_cg = &target_core_hbagroup;
2991 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2992 GFP_KERNEL);
2993 if (!hba_cg->default_groups) {
2994 pr_err("Unable to allocate hba_cg->default_groups\n");
2995 ret = -ENOMEM;
2996 goto out_global;
2997 }
2998 config_group_init_type_name(&alua_group,
2999 "alua", &target_core_alua_cit);
3000 hba_cg->default_groups[0] = &alua_group;
3001 hba_cg->default_groups[1] = NULL;
3002 /*
3003 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3004 * groups under /sys/kernel/config/target/core/alua/
3005 */
3006 alua_cg = &alua_group;
3007 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3008 GFP_KERNEL);
3009 if (!alua_cg->default_groups) {
3010 pr_err("Unable to allocate alua_cg->default_groups\n");
3011 ret = -ENOMEM;
3012 goto out_global;
3013 }
3014
3015 config_group_init_type_name(&alua_lu_gps_group,
3016 "lu_gps", &target_core_alua_lu_gps_cit);
3017 alua_cg->default_groups[0] = &alua_lu_gps_group;
3018 alua_cg->default_groups[1] = NULL;
3019 /*
3020 * Add core/alua/lu_gps/default_lu_gp
3021 */
3022 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3023 if (IS_ERR(lu_gp)) {
3024 ret = -ENOMEM;
3025 goto out_global;
3026 }
3027
3028 lu_gp_cg = &alua_lu_gps_group;
3029 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3030 GFP_KERNEL);
3031 if (!lu_gp_cg->default_groups) {
3032 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3033 ret = -ENOMEM;
3034 goto out_global;
3035 }
3036
3037 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3038 &target_core_alua_lu_gp_cit);
3039 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3040 lu_gp_cg->default_groups[1] = NULL;
3041 default_lu_gp = lu_gp;
3042 /*
3043 * Register the target_core_mod subsystem with configfs.
3044 */
3045 ret = configfs_register_subsystem(subsys);
3046 if (ret < 0) {
3047 pr_err("Error %d while registering subsystem %s\n",
3048 ret, subsys->su_group.cg_item.ci_namebuf);
3049 goto out_global;
3050 }
3051 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3052 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3053 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3054 /*
3055 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3056 */
3057 ret = rd_module_init();
3058 if (ret < 0)
3059 goto out;
3060
3061 ret = core_dev_setup_virtual_lun0();
3062 if (ret < 0)
3063 goto out;
3064
3065 ret = target_xcopy_setup_pt();
3066 if (ret < 0)
3067 goto out;
3068
3069 return 0;
3070
3071 out:
3072 configfs_unregister_subsystem(subsys);
3073 core_dev_release_virtual_lun0();
3074 rd_module_exit();
3075 out_global:
3076 if (default_lu_gp) {
3077 core_alua_free_lu_gp(default_lu_gp);
3078 default_lu_gp = NULL;
3079 }
3080 if (lu_gp_cg)
3081 kfree(lu_gp_cg->default_groups);
3082 if (alua_cg)
3083 kfree(alua_cg->default_groups);
3084 if (hba_cg)
3085 kfree(hba_cg->default_groups);
3086 kfree(target_cg->default_groups);
3087 release_se_kmem_caches();
3088 return ret;
3089 }
3090
3091 static void __exit target_core_exit_configfs(void)
3092 {
3093 struct configfs_subsystem *subsys;
3094 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3095 struct config_item *item;
3096 int i;
3097
3098 subsys = target_core_subsystem[0];
3099
3100 lu_gp_cg = &alua_lu_gps_group;
3101 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3102 item = &lu_gp_cg->default_groups[i]->cg_item;
3103 lu_gp_cg->default_groups[i] = NULL;
3104 config_item_put(item);
3105 }
3106 kfree(lu_gp_cg->default_groups);
3107 lu_gp_cg->default_groups = NULL;
3108
3109 alua_cg = &alua_group;
3110 for (i = 0; alua_cg->default_groups[i]; i++) {
3111 item = &alua_cg->default_groups[i]->cg_item;
3112 alua_cg->default_groups[i] = NULL;
3113 config_item_put(item);
3114 }
3115 kfree(alua_cg->default_groups);
3116 alua_cg->default_groups = NULL;
3117
3118 hba_cg = &target_core_hbagroup;
3119 for (i = 0; hba_cg->default_groups[i]; i++) {
3120 item = &hba_cg->default_groups[i]->cg_item;
3121 hba_cg->default_groups[i] = NULL;
3122 config_item_put(item);
3123 }
3124 kfree(hba_cg->default_groups);
3125 hba_cg->default_groups = NULL;
3126 /*
3127 * We expect subsys->su_group.default_groups to be released
3128 * by configfs subsystem provider logic..
3129 */
3130 configfs_unregister_subsystem(subsys);
3131 kfree(subsys->su_group.default_groups);
3132
3133 core_alua_free_lu_gp(default_lu_gp);
3134 default_lu_gp = NULL;
3135
3136 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3137 " Infrastructure\n");
3138
3139 core_dev_release_virtual_lun0();
3140 rd_module_exit();
3141 target_xcopy_release_pt();
3142 release_se_kmem_caches();
3143 }
3144
3145 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3146 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3147 MODULE_LICENSE("GPL");
3148
3149 module_init(target_core_init_configfs);
3150 module_exit(target_core_exit_configfs);
Linux with added FPC-III support