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