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KVM: x86: Rework INIT and SIPI handling
[linux-2.6/btrfs-unstable.git] / drivers / target / target_core_configfs.c
blob43b7ac6c5b1c80e5132bb793d4a447abf11f443c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2012 RisingTide Systems LLC.
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
52 extern struct t10_alua_lu_gp *default_lu_gp;
53
54 static LIST_HEAD(g_tf_list);
55 static DEFINE_MUTEX(g_tf_lock);
56
57 struct target_core_configfs_attribute {
58 struct configfs_attribute attr;
59 ssize_t (*show)(void *, char *);
60 ssize_t (*store)(void *, const char *, size_t);
61 };
62
63 static struct config_group target_core_hbagroup;
64 static struct config_group alua_group;
65 static struct config_group alua_lu_gps_group;
66
67 static inline struct se_hba *
68 item_to_hba(struct config_item *item)
69 {
70 return container_of(to_config_group(item), struct se_hba, hba_group);
71 }
72
73 /*
74 * Attributes for /sys/kernel/config/target/
75 */
76 static ssize_t target_core_attr_show(struct config_item *item,
77 struct configfs_attribute *attr,
78 char *page)
79 {
80 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
81 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
82 utsname()->sysname, utsname()->machine);
83 }
84
85 static struct configfs_item_operations target_core_fabric_item_ops = {
86 .show_attribute = target_core_attr_show,
87 };
88
89 static struct configfs_attribute target_core_item_attr_version = {
90 .ca_owner = THIS_MODULE,
91 .ca_name = "version",
92 .ca_mode = S_IRUGO,
93 };
94
95 static struct target_fabric_configfs *target_core_get_fabric(
96 const char *name)
97 {
98 struct target_fabric_configfs *tf;
99
100 if (!name)
101 return NULL;
102
103 mutex_lock(&g_tf_lock);
104 list_for_each_entry(tf, &g_tf_list, tf_list) {
105 if (!strcmp(tf->tf_name, name)) {
106 atomic_inc(&tf->tf_access_cnt);
107 mutex_unlock(&g_tf_lock);
108 return tf;
109 }
110 }
111 mutex_unlock(&g_tf_lock);
112
113 return NULL;
114 }
115
116 /*
117 * Called from struct target_core_group_ops->make_group()
118 */
119 static struct config_group *target_core_register_fabric(
120 struct config_group *group,
121 const char *name)
122 {
123 struct target_fabric_configfs *tf;
124 int ret;
125
126 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
127 " %s\n", group, name);
128 /*
129 * Below are some hardcoded request_module() calls to automatically
130 * local fabric modules when the following is called:
131 *
132 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
133 *
134 * Note that this does not limit which TCM fabric module can be
135 * registered, but simply provids auto loading logic for modules with
136 * mkdir(2) system calls with known TCM fabric modules.
137 */
138 if (!strncmp(name, "iscsi", 5)) {
139 /*
140 * Automatically load the LIO Target fabric module when the
141 * following is called:
142 *
143 * mkdir -p $CONFIGFS/target/iscsi
144 */
145 ret = request_module("iscsi_target_mod");
146 if (ret < 0) {
147 pr_err("request_module() failed for"
148 " iscsi_target_mod.ko: %d\n", ret);
149 return ERR_PTR(-EINVAL);
150 }
151 } else if (!strncmp(name, "loopback", 8)) {
152 /*
153 * Automatically load the tcm_loop fabric module when the
154 * following is called:
155 *
156 * mkdir -p $CONFIGFS/target/loopback
157 */
158 ret = request_module("tcm_loop");
159 if (ret < 0) {
160 pr_err("request_module() failed for"
161 " tcm_loop.ko: %d\n", ret);
162 return ERR_PTR(-EINVAL);
163 }
164 }
165
166 tf = target_core_get_fabric(name);
167 if (!tf) {
168 pr_err("target_core_get_fabric() failed for %s\n",
169 name);
170 return ERR_PTR(-EINVAL);
171 }
172 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
173 " %s\n", tf->tf_name);
174 /*
175 * On a successful target_core_get_fabric() look, the returned
176 * struct target_fabric_configfs *tf will contain a usage reference.
177 */
178 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
179 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
180
181 tf->tf_group.default_groups = tf->tf_default_groups;
182 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
183 tf->tf_group.default_groups[1] = NULL;
184
185 config_group_init_type_name(&tf->tf_group, name,
186 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
187 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
188 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
189
190 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
191 " %s\n", tf->tf_group.cg_item.ci_name);
192 /*
193 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
194 */
195 tf->tf_ops.tf_subsys = tf->tf_subsys;
196 tf->tf_fabric = &tf->tf_group.cg_item;
197 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
198 " for %s\n", name);
199
200 return &tf->tf_group;
201 }
202
203 /*
204 * Called from struct target_core_group_ops->drop_item()
205 */
206 static void target_core_deregister_fabric(
207 struct config_group *group,
208 struct config_item *item)
209 {
210 struct target_fabric_configfs *tf = container_of(
211 to_config_group(item), struct target_fabric_configfs, tf_group);
212 struct config_group *tf_group;
213 struct config_item *df_item;
214 int i;
215
216 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
217 " tf list\n", config_item_name(item));
218
219 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
220 " %s\n", tf->tf_name);
221 atomic_dec(&tf->tf_access_cnt);
222
223 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
224 " tf->tf_fabric for %s\n", tf->tf_name);
225 tf->tf_fabric = NULL;
226
227 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
228 " %s\n", config_item_name(item));
229
230 tf_group = &tf->tf_group;
231 for (i = 0; tf_group->default_groups[i]; i++) {
232 df_item = &tf_group->default_groups[i]->cg_item;
233 tf_group->default_groups[i] = NULL;
234 config_item_put(df_item);
235 }
236 config_item_put(item);
237 }
238
239 static struct configfs_group_operations target_core_fabric_group_ops = {
240 .make_group = &target_core_register_fabric,
241 .drop_item = &target_core_deregister_fabric,
242 };
243
244 /*
245 * All item attributes appearing in /sys/kernel/target/ appear here.
246 */
247 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
248 &target_core_item_attr_version,
249 NULL,
250 };
251
252 /*
253 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
254 */
255 static struct config_item_type target_core_fabrics_item = {
256 .ct_item_ops = &target_core_fabric_item_ops,
257 .ct_group_ops = &target_core_fabric_group_ops,
258 .ct_attrs = target_core_fabric_item_attrs,
259 .ct_owner = THIS_MODULE,
260 };
261
262 static struct configfs_subsystem target_core_fabrics = {
263 .su_group = {
264 .cg_item = {
265 .ci_namebuf = "target",
266 .ci_type = &target_core_fabrics_item,
267 },
268 },
269 };
270
271 static struct configfs_subsystem *target_core_subsystem[] = {
272 &target_core_fabrics,
273 NULL,
274 };
275
276 /*##############################################################################
277 // Start functions called by external Target Fabrics Modules
278 //############################################################################*/
279
280 /*
281 * First function called by fabric modules to:
282 *
283 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
284 * 2) Add struct target_fabric_configfs to g_tf_list
285 * 3) Return struct target_fabric_configfs to fabric module to be passed
286 * into target_fabric_configfs_register().
287 */
288 struct target_fabric_configfs *target_fabric_configfs_init(
289 struct module *fabric_mod,
290 const char *name)
291 {
292 struct target_fabric_configfs *tf;
293
294 if (!(name)) {
295 pr_err("Unable to locate passed fabric name\n");
296 return ERR_PTR(-EINVAL);
297 }
298 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
299 pr_err("Passed name: %s exceeds TARGET_FABRIC"
300 "_NAME_SIZE\n", name);
301 return ERR_PTR(-EINVAL);
302 }
303
304 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
305 if (!tf)
306 return ERR_PTR(-ENOMEM);
307
308 INIT_LIST_HEAD(&tf->tf_list);
309 atomic_set(&tf->tf_access_cnt, 0);
310 /*
311 * Setup the default generic struct config_item_type's (cits) in
312 * struct target_fabric_configfs->tf_cit_tmpl
313 */
314 tf->tf_module = fabric_mod;
315 target_fabric_setup_cits(tf);
316
317 tf->tf_subsys = target_core_subsystem[0];
318 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
319
320 mutex_lock(&g_tf_lock);
321 list_add_tail(&tf->tf_list, &g_tf_list);
322 mutex_unlock(&g_tf_lock);
323
324 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
325 ">>>>>>>>>>>>>>\n");
326 pr_debug("Initialized struct target_fabric_configfs: %p for"
327 " %s\n", tf, tf->tf_name);
328 return tf;
329 }
330 EXPORT_SYMBOL(target_fabric_configfs_init);
331
332 /*
333 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
334 */
335 void target_fabric_configfs_free(
336 struct target_fabric_configfs *tf)
337 {
338 mutex_lock(&g_tf_lock);
339 list_del(&tf->tf_list);
340 mutex_unlock(&g_tf_lock);
341
342 kfree(tf);
343 }
344 EXPORT_SYMBOL(target_fabric_configfs_free);
345
346 /*
347 * Perform a sanity check of the passed tf->tf_ops before completing
348 * TCM fabric module registration.
349 */
350 static int target_fabric_tf_ops_check(
351 struct target_fabric_configfs *tf)
352 {
353 struct target_core_fabric_ops *tfo = &tf->tf_ops;
354
355 if (!tfo->get_fabric_name) {
356 pr_err("Missing tfo->get_fabric_name()\n");
357 return -EINVAL;
358 }
359 if (!tfo->get_fabric_proto_ident) {
360 pr_err("Missing tfo->get_fabric_proto_ident()\n");
361 return -EINVAL;
362 }
363 if (!tfo->tpg_get_wwn) {
364 pr_err("Missing tfo->tpg_get_wwn()\n");
365 return -EINVAL;
366 }
367 if (!tfo->tpg_get_tag) {
368 pr_err("Missing tfo->tpg_get_tag()\n");
369 return -EINVAL;
370 }
371 if (!tfo->tpg_get_default_depth) {
372 pr_err("Missing tfo->tpg_get_default_depth()\n");
373 return -EINVAL;
374 }
375 if (!tfo->tpg_get_pr_transport_id) {
376 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
377 return -EINVAL;
378 }
379 if (!tfo->tpg_get_pr_transport_id_len) {
380 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
381 return -EINVAL;
382 }
383 if (!tfo->tpg_check_demo_mode) {
384 pr_err("Missing tfo->tpg_check_demo_mode()\n");
385 return -EINVAL;
386 }
387 if (!tfo->tpg_check_demo_mode_cache) {
388 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
389 return -EINVAL;
390 }
391 if (!tfo->tpg_check_demo_mode_write_protect) {
392 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
393 return -EINVAL;
394 }
395 if (!tfo->tpg_check_prod_mode_write_protect) {
396 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
397 return -EINVAL;
398 }
399 if (!tfo->tpg_alloc_fabric_acl) {
400 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
401 return -EINVAL;
402 }
403 if (!tfo->tpg_release_fabric_acl) {
404 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
405 return -EINVAL;
406 }
407 if (!tfo->tpg_get_inst_index) {
408 pr_err("Missing tfo->tpg_get_inst_index()\n");
409 return -EINVAL;
410 }
411 if (!tfo->release_cmd) {
412 pr_err("Missing tfo->release_cmd()\n");
413 return -EINVAL;
414 }
415 if (!tfo->shutdown_session) {
416 pr_err("Missing tfo->shutdown_session()\n");
417 return -EINVAL;
418 }
419 if (!tfo->close_session) {
420 pr_err("Missing tfo->close_session()\n");
421 return -EINVAL;
422 }
423 if (!tfo->sess_get_index) {
424 pr_err("Missing tfo->sess_get_index()\n");
425 return -EINVAL;
426 }
427 if (!tfo->write_pending) {
428 pr_err("Missing tfo->write_pending()\n");
429 return -EINVAL;
430 }
431 if (!tfo->write_pending_status) {
432 pr_err("Missing tfo->write_pending_status()\n");
433 return -EINVAL;
434 }
435 if (!tfo->set_default_node_attributes) {
436 pr_err("Missing tfo->set_default_node_attributes()\n");
437 return -EINVAL;
438 }
439 if (!tfo->get_task_tag) {
440 pr_err("Missing tfo->get_task_tag()\n");
441 return -EINVAL;
442 }
443 if (!tfo->get_cmd_state) {
444 pr_err("Missing tfo->get_cmd_state()\n");
445 return -EINVAL;
446 }
447 if (!tfo->queue_data_in) {
448 pr_err("Missing tfo->queue_data_in()\n");
449 return -EINVAL;
450 }
451 if (!tfo->queue_status) {
452 pr_err("Missing tfo->queue_status()\n");
453 return -EINVAL;
454 }
455 if (!tfo->queue_tm_rsp) {
456 pr_err("Missing tfo->queue_tm_rsp()\n");
457 return -EINVAL;
458 }
459 /*
460 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
461 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
462 * target_core_fabric_configfs.c WWN+TPG group context code.
463 */
464 if (!tfo->fabric_make_wwn) {
465 pr_err("Missing tfo->fabric_make_wwn()\n");
466 return -EINVAL;
467 }
468 if (!tfo->fabric_drop_wwn) {
469 pr_err("Missing tfo->fabric_drop_wwn()\n");
470 return -EINVAL;
471 }
472 if (!tfo->fabric_make_tpg) {
473 pr_err("Missing tfo->fabric_make_tpg()\n");
474 return -EINVAL;
475 }
476 if (!tfo->fabric_drop_tpg) {
477 pr_err("Missing tfo->fabric_drop_tpg()\n");
478 return -EINVAL;
479 }
480
481 return 0;
482 }
483
484 /*
485 * Called 2nd from fabric module with returned parameter of
486 * struct target_fabric_configfs * from target_fabric_configfs_init().
487 *
488 * Upon a successful registration, the new fabric's struct config_item is
489 * return. Also, a pointer to this struct is set in the passed
490 * struct target_fabric_configfs.
491 */
492 int target_fabric_configfs_register(
493 struct target_fabric_configfs *tf)
494 {
495 int ret;
496
497 if (!tf) {
498 pr_err("Unable to locate target_fabric_configfs"
499 " pointer\n");
500 return -EINVAL;
501 }
502 if (!tf->tf_subsys) {
503 pr_err("Unable to target struct config_subsystem"
504 " pointer\n");
505 return -EINVAL;
506 }
507 ret = target_fabric_tf_ops_check(tf);
508 if (ret < 0)
509 return ret;
510
511 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
512 ">>>>>>>>>>\n");
513 return 0;
514 }
515 EXPORT_SYMBOL(target_fabric_configfs_register);
516
517 void target_fabric_configfs_deregister(
518 struct target_fabric_configfs *tf)
519 {
520 struct configfs_subsystem *su;
521
522 if (!tf) {
523 pr_err("Unable to locate passed target_fabric_"
524 "configfs\n");
525 return;
526 }
527 su = tf->tf_subsys;
528 if (!su) {
529 pr_err("Unable to locate passed tf->tf_subsys"
530 " pointer\n");
531 return;
532 }
533 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
534 ">>>>>>>>>>>>\n");
535 mutex_lock(&g_tf_lock);
536 if (atomic_read(&tf->tf_access_cnt)) {
537 mutex_unlock(&g_tf_lock);
538 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
539 tf->tf_name);
540 BUG();
541 }
542 list_del(&tf->tf_list);
543 mutex_unlock(&g_tf_lock);
544
545 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
546 " %s\n", tf->tf_name);
547 tf->tf_module = NULL;
548 tf->tf_subsys = NULL;
549 kfree(tf);
550
551 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
552 ">>>>>\n");
553 }
554 EXPORT_SYMBOL(target_fabric_configfs_deregister);
555
556 /*##############################################################################
557 // Stop functions called by external Target Fabrics Modules
558 //############################################################################*/
559
560 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
561
562 #define DEF_DEV_ATTRIB_SHOW(_name) \
563 static ssize_t target_core_dev_show_attr_##_name( \
564 struct se_dev_attrib *da, \
565 char *page) \
566 { \
567 return snprintf(page, PAGE_SIZE, "%u\n", \
568 (u32)da->da_dev->dev_attrib._name); \
569 }
570
571 #define DEF_DEV_ATTRIB_STORE(_name) \
572 static ssize_t target_core_dev_store_attr_##_name( \
573 struct se_dev_attrib *da, \
574 const char *page, \
575 size_t count) \
576 { \
577 unsigned long val; \
578 int ret; \
579 \
580 ret = strict_strtoul(page, 0, &val); \
581 if (ret < 0) { \
582 pr_err("strict_strtoul() failed with" \
583 " ret: %d\n", ret); \
584 return -EINVAL; \
585 } \
586 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
587 \
588 return (!ret) ? count : -EINVAL; \
589 }
590
591 #define DEF_DEV_ATTRIB(_name) \
592 DEF_DEV_ATTRIB_SHOW(_name); \
593 DEF_DEV_ATTRIB_STORE(_name);
594
595 #define DEF_DEV_ATTRIB_RO(_name) \
596 DEF_DEV_ATTRIB_SHOW(_name);
597
598 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
599 #define SE_DEV_ATTR(_name, _mode) \
600 static struct target_core_dev_attrib_attribute \
601 target_core_dev_attrib_##_name = \
602 __CONFIGFS_EATTR(_name, _mode, \
603 target_core_dev_show_attr_##_name, \
604 target_core_dev_store_attr_##_name);
605
606 #define SE_DEV_ATTR_RO(_name); \
607 static struct target_core_dev_attrib_attribute \
608 target_core_dev_attrib_##_name = \
609 __CONFIGFS_EATTR_RO(_name, \
610 target_core_dev_show_attr_##_name);
611
612 DEF_DEV_ATTRIB(emulate_model_alias);
613 SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
614
615 DEF_DEV_ATTRIB(emulate_dpo);
616 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
617
618 DEF_DEV_ATTRIB(emulate_fua_write);
619 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
620
621 DEF_DEV_ATTRIB(emulate_fua_read);
622 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
623
624 DEF_DEV_ATTRIB(emulate_write_cache);
625 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
626
627 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
628 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
629
630 DEF_DEV_ATTRIB(emulate_tas);
631 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
632
633 DEF_DEV_ATTRIB(emulate_tpu);
634 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
635
636 DEF_DEV_ATTRIB(emulate_tpws);
637 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
638
639 DEF_DEV_ATTRIB(enforce_pr_isids);
640 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
641
642 DEF_DEV_ATTRIB(is_nonrot);
643 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
644
645 DEF_DEV_ATTRIB(emulate_rest_reord);
646 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
647
648 DEF_DEV_ATTRIB_RO(hw_block_size);
649 SE_DEV_ATTR_RO(hw_block_size);
650
651 DEF_DEV_ATTRIB(block_size);
652 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
653
654 DEF_DEV_ATTRIB_RO(hw_max_sectors);
655 SE_DEV_ATTR_RO(hw_max_sectors);
656
657 DEF_DEV_ATTRIB(fabric_max_sectors);
658 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
659
660 DEF_DEV_ATTRIB(optimal_sectors);
661 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
662
663 DEF_DEV_ATTRIB_RO(hw_queue_depth);
664 SE_DEV_ATTR_RO(hw_queue_depth);
665
666 DEF_DEV_ATTRIB(queue_depth);
667 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
668
669 DEF_DEV_ATTRIB(max_unmap_lba_count);
670 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
671
672 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
673 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
674
675 DEF_DEV_ATTRIB(unmap_granularity);
676 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
677
678 DEF_DEV_ATTRIB(unmap_granularity_alignment);
679 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
680
681 DEF_DEV_ATTRIB(max_write_same_len);
682 SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
683
684 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
685
686 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
687 &target_core_dev_attrib_emulate_model_alias.attr,
688 &target_core_dev_attrib_emulate_dpo.attr,
689 &target_core_dev_attrib_emulate_fua_write.attr,
690 &target_core_dev_attrib_emulate_fua_read.attr,
691 &target_core_dev_attrib_emulate_write_cache.attr,
692 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
693 &target_core_dev_attrib_emulate_tas.attr,
694 &target_core_dev_attrib_emulate_tpu.attr,
695 &target_core_dev_attrib_emulate_tpws.attr,
696 &target_core_dev_attrib_enforce_pr_isids.attr,
697 &target_core_dev_attrib_is_nonrot.attr,
698 &target_core_dev_attrib_emulate_rest_reord.attr,
699 &target_core_dev_attrib_hw_block_size.attr,
700 &target_core_dev_attrib_block_size.attr,
701 &target_core_dev_attrib_hw_max_sectors.attr,
702 &target_core_dev_attrib_fabric_max_sectors.attr,
703 &target_core_dev_attrib_optimal_sectors.attr,
704 &target_core_dev_attrib_hw_queue_depth.attr,
705 &target_core_dev_attrib_queue_depth.attr,
706 &target_core_dev_attrib_max_unmap_lba_count.attr,
707 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
708 &target_core_dev_attrib_unmap_granularity.attr,
709 &target_core_dev_attrib_unmap_granularity_alignment.attr,
710 &target_core_dev_attrib_max_write_same_len.attr,
711 NULL,
712 };
713
714 static struct configfs_item_operations target_core_dev_attrib_ops = {
715 .show_attribute = target_core_dev_attrib_attr_show,
716 .store_attribute = target_core_dev_attrib_attr_store,
717 };
718
719 static struct config_item_type target_core_dev_attrib_cit = {
720 .ct_item_ops = &target_core_dev_attrib_ops,
721 .ct_attrs = target_core_dev_attrib_attrs,
722 .ct_owner = THIS_MODULE,
723 };
724
725 /* End functions for struct config_item_type target_core_dev_attrib_cit */
726
727 /* Start functions for struct config_item_type target_core_dev_wwn_cit */
728
729 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
730 #define SE_DEV_WWN_ATTR(_name, _mode) \
731 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
732 __CONFIGFS_EATTR(_name, _mode, \
733 target_core_dev_wwn_show_attr_##_name, \
734 target_core_dev_wwn_store_attr_##_name);
735
736 #define SE_DEV_WWN_ATTR_RO(_name); \
737 do { \
738 static struct target_core_dev_wwn_attribute \
739 target_core_dev_wwn_##_name = \
740 __CONFIGFS_EATTR_RO(_name, \
741 target_core_dev_wwn_show_attr_##_name); \
742 } while (0);
743
744 /*
745 * VPD page 0x80 Unit serial
746 */
747 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
748 struct t10_wwn *t10_wwn,
749 char *page)
750 {
751 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
752 &t10_wwn->unit_serial[0]);
753 }
754
755 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
756 struct t10_wwn *t10_wwn,
757 const char *page,
758 size_t count)
759 {
760 struct se_device *dev = t10_wwn->t10_dev;
761 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
762
763 /*
764 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
765 * from the struct scsi_device level firmware, do not allow
766 * VPD Unit Serial to be emulated.
767 *
768 * Note this struct scsi_device could also be emulating VPD
769 * information from its drivers/scsi LLD. But for now we assume
770 * it is doing 'the right thing' wrt a world wide unique
771 * VPD Unit Serial Number that OS dependent multipath can depend on.
772 */
773 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
774 pr_err("Underlying SCSI device firmware provided VPD"
775 " Unit Serial, ignoring request\n");
776 return -EOPNOTSUPP;
777 }
778
779 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
780 pr_err("Emulated VPD Unit Serial exceeds"
781 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
782 return -EOVERFLOW;
783 }
784 /*
785 * Check to see if any active $FABRIC_MOD exports exist. If they
786 * do exist, fail here as changing this information on the fly
787 * (underneath the initiator side OS dependent multipath code)
788 * could cause negative effects.
789 */
790 if (dev->export_count) {
791 pr_err("Unable to set VPD Unit Serial while"
792 " active %d $FABRIC_MOD exports exist\n",
793 dev->export_count);
794 return -EINVAL;
795 }
796
797 /*
798 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
799 *
800 * Also, strip any newline added from the userspace
801 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
802 */
803 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
804 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
805 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
806 "%s", strstrip(buf));
807 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
808
809 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
810 " %s\n", dev->t10_wwn.unit_serial);
811
812 return count;
813 }
814
815 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
816
817 /*
818 * VPD page 0x83 Protocol Identifier
819 */
820 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
821 struct t10_wwn *t10_wwn,
822 char *page)
823 {
824 struct t10_vpd *vpd;
825 unsigned char buf[VPD_TMP_BUF_SIZE];
826 ssize_t len = 0;
827
828 memset(buf, 0, VPD_TMP_BUF_SIZE);
829
830 spin_lock(&t10_wwn->t10_vpd_lock);
831 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
832 if (!vpd->protocol_identifier_set)
833 continue;
834
835 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
836
837 if (len + strlen(buf) >= PAGE_SIZE)
838 break;
839
840 len += sprintf(page+len, "%s", buf);
841 }
842 spin_unlock(&t10_wwn->t10_vpd_lock);
843
844 return len;
845 }
846
847 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
848 struct t10_wwn *t10_wwn,
849 const char *page,
850 size_t count)
851 {
852 return -ENOSYS;
853 }
854
855 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
856
857 /*
858 * Generic wrapper for dumping VPD identifiers by association.
859 */
860 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
861 static ssize_t target_core_dev_wwn_show_attr_##_name( \
862 struct t10_wwn *t10_wwn, \
863 char *page) \
864 { \
865 struct t10_vpd *vpd; \
866 unsigned char buf[VPD_TMP_BUF_SIZE]; \
867 ssize_t len = 0; \
868 \
869 spin_lock(&t10_wwn->t10_vpd_lock); \
870 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
871 if (vpd->association != _assoc) \
872 continue; \
873 \
874 memset(buf, 0, VPD_TMP_BUF_SIZE); \
875 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
876 if (len + strlen(buf) >= PAGE_SIZE) \
877 break; \
878 len += sprintf(page+len, "%s", buf); \
879 \
880 memset(buf, 0, VPD_TMP_BUF_SIZE); \
881 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
882 if (len + strlen(buf) >= PAGE_SIZE) \
883 break; \
884 len += sprintf(page+len, "%s", buf); \
885 \
886 memset(buf, 0, VPD_TMP_BUF_SIZE); \
887 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
888 if (len + strlen(buf) >= PAGE_SIZE) \
889 break; \
890 len += sprintf(page+len, "%s", buf); \
891 } \
892 spin_unlock(&t10_wwn->t10_vpd_lock); \
893 \
894 return len; \
895 }
896
897 /*
898 * VPD page 0x83 Association: Logical Unit
899 */
900 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
901
902 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
903 struct t10_wwn *t10_wwn,
904 const char *page,
905 size_t count)
906 {
907 return -ENOSYS;
908 }
909
910 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
911
912 /*
913 * VPD page 0x83 Association: Target Port
914 */
915 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
916
917 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
918 struct t10_wwn *t10_wwn,
919 const char *page,
920 size_t count)
921 {
922 return -ENOSYS;
923 }
924
925 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
926
927 /*
928 * VPD page 0x83 Association: SCSI Target Device
929 */
930 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
931
932 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
933 struct t10_wwn *t10_wwn,
934 const char *page,
935 size_t count)
936 {
937 return -ENOSYS;
938 }
939
940 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
941
942 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
943
944 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
945 &target_core_dev_wwn_vpd_unit_serial.attr,
946 &target_core_dev_wwn_vpd_protocol_identifier.attr,
947 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
948 &target_core_dev_wwn_vpd_assoc_target_port.attr,
949 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
950 NULL,
951 };
952
953 static struct configfs_item_operations target_core_dev_wwn_ops = {
954 .show_attribute = target_core_dev_wwn_attr_show,
955 .store_attribute = target_core_dev_wwn_attr_store,
956 };
957
958 static struct config_item_type target_core_dev_wwn_cit = {
959 .ct_item_ops = &target_core_dev_wwn_ops,
960 .ct_attrs = target_core_dev_wwn_attrs,
961 .ct_owner = THIS_MODULE,
962 };
963
964 /* End functions for struct config_item_type target_core_dev_wwn_cit */
965
966 /* Start functions for struct config_item_type target_core_dev_pr_cit */
967
968 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
969 #define SE_DEV_PR_ATTR(_name, _mode) \
970 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
971 __CONFIGFS_EATTR(_name, _mode, \
972 target_core_dev_pr_show_attr_##_name, \
973 target_core_dev_pr_store_attr_##_name);
974
975 #define SE_DEV_PR_ATTR_RO(_name); \
976 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
977 __CONFIGFS_EATTR_RO(_name, \
978 target_core_dev_pr_show_attr_##_name);
979
980 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
981 char *page)
982 {
983 struct se_node_acl *se_nacl;
984 struct t10_pr_registration *pr_reg;
985 char i_buf[PR_REG_ISID_ID_LEN];
986 int prf_isid;
987
988 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
989
990 pr_reg = dev->dev_pr_res_holder;
991 if (!pr_reg)
992 return sprintf(page, "No SPC-3 Reservation holder\n");
993
994 se_nacl = pr_reg->pr_reg_nacl;
995 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
996 PR_REG_ISID_ID_LEN);
997
998 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
999 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1000 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1001 }
1002
1003 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1004 char *page)
1005 {
1006 struct se_node_acl *se_nacl;
1007 ssize_t len;
1008
1009 se_nacl = dev->dev_reserved_node_acl;
1010 if (se_nacl) {
1011 len = sprintf(page,
1012 "SPC-2 Reservation: %s Initiator: %s\n",
1013 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1014 se_nacl->initiatorname);
1015 } else {
1016 len = sprintf(page, "No SPC-2 Reservation holder\n");
1017 }
1018 return len;
1019 }
1020
1021 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1022 char *page)
1023 {
1024 int ret;
1025
1026 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1027 return sprintf(page, "Passthrough\n");
1028
1029 spin_lock(&dev->dev_reservation_lock);
1030 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1031 ret = target_core_dev_pr_show_spc2_res(dev, page);
1032 else
1033 ret = target_core_dev_pr_show_spc3_res(dev, page);
1034 spin_unlock(&dev->dev_reservation_lock);
1035 return ret;
1036 }
1037
1038 SE_DEV_PR_ATTR_RO(res_holder);
1039
1040 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1041 struct se_device *dev, char *page)
1042 {
1043 ssize_t len = 0;
1044
1045 spin_lock(&dev->dev_reservation_lock);
1046 if (!dev->dev_pr_res_holder) {
1047 len = sprintf(page, "No SPC-3 Reservation holder\n");
1048 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1049 len = sprintf(page, "SPC-3 Reservation: All Target"
1050 " Ports registration\n");
1051 } else {
1052 len = sprintf(page, "SPC-3 Reservation: Single"
1053 " Target Port registration\n");
1054 }
1055
1056 spin_unlock(&dev->dev_reservation_lock);
1057 return len;
1058 }
1059
1060 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1061
1062 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1063 struct se_device *dev, char *page)
1064 {
1065 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1066 }
1067
1068 SE_DEV_PR_ATTR_RO(res_pr_generation);
1069
1070 /*
1071 * res_pr_holder_tg_port
1072 */
1073 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1074 struct se_device *dev, char *page)
1075 {
1076 struct se_node_acl *se_nacl;
1077 struct se_lun *lun;
1078 struct se_portal_group *se_tpg;
1079 struct t10_pr_registration *pr_reg;
1080 struct target_core_fabric_ops *tfo;
1081 ssize_t len = 0;
1082
1083 spin_lock(&dev->dev_reservation_lock);
1084 pr_reg = dev->dev_pr_res_holder;
1085 if (!pr_reg) {
1086 len = sprintf(page, "No SPC-3 Reservation holder\n");
1087 goto out_unlock;
1088 }
1089
1090 se_nacl = pr_reg->pr_reg_nacl;
1091 se_tpg = se_nacl->se_tpg;
1092 lun = pr_reg->pr_reg_tg_pt_lun;
1093 tfo = se_tpg->se_tpg_tfo;
1094
1095 len += sprintf(page+len, "SPC-3 Reservation: %s"
1096 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1097 tfo->tpg_get_wwn(se_tpg));
1098 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1099 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1100 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1101 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1102 tfo->get_fabric_name(), lun->unpacked_lun);
1103
1104 out_unlock:
1105 spin_unlock(&dev->dev_reservation_lock);
1106 return len;
1107 }
1108
1109 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1110
1111 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1112 struct se_device *dev, char *page)
1113 {
1114 struct target_core_fabric_ops *tfo;
1115 struct t10_pr_registration *pr_reg;
1116 unsigned char buf[384];
1117 char i_buf[PR_REG_ISID_ID_LEN];
1118 ssize_t len = 0;
1119 int reg_count = 0, prf_isid;
1120
1121 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1122
1123 spin_lock(&dev->t10_pr.registration_lock);
1124 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1125 pr_reg_list) {
1126
1127 memset(buf, 0, 384);
1128 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1129 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1130 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1131 PR_REG_ISID_ID_LEN);
1132 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1133 tfo->get_fabric_name(),
1134 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1135 &i_buf[0] : "", pr_reg->pr_res_key,
1136 pr_reg->pr_res_generation);
1137
1138 if (len + strlen(buf) >= PAGE_SIZE)
1139 break;
1140
1141 len += sprintf(page+len, "%s", buf);
1142 reg_count++;
1143 }
1144 spin_unlock(&dev->t10_pr.registration_lock);
1145
1146 if (!reg_count)
1147 len += sprintf(page+len, "None\n");
1148
1149 return len;
1150 }
1151
1152 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1153
1154 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1155 struct se_device *dev, char *page)
1156 {
1157 struct t10_pr_registration *pr_reg;
1158 ssize_t len = 0;
1159
1160 spin_lock(&dev->dev_reservation_lock);
1161 pr_reg = dev->dev_pr_res_holder;
1162 if (pr_reg) {
1163 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1164 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1165 } else {
1166 len = sprintf(page, "No SPC-3 Reservation holder\n");
1167 }
1168
1169 spin_unlock(&dev->dev_reservation_lock);
1170 return len;
1171 }
1172
1173 SE_DEV_PR_ATTR_RO(res_pr_type);
1174
1175 static ssize_t target_core_dev_pr_show_attr_res_type(
1176 struct se_device *dev, char *page)
1177 {
1178 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1179 return sprintf(page, "SPC_PASSTHROUGH\n");
1180 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1181 return sprintf(page, "SPC2_RESERVATIONS\n");
1182 else
1183 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1184 }
1185
1186 SE_DEV_PR_ATTR_RO(res_type);
1187
1188 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1189 struct se_device *dev, char *page)
1190 {
1191 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1192 return 0;
1193
1194 return sprintf(page, "APTPL Bit Status: %s\n",
1195 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1196 }
1197
1198 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1199
1200 /*
1201 * res_aptpl_metadata
1202 */
1203 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1204 struct se_device *dev, char *page)
1205 {
1206 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1207 return 0;
1208
1209 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1210 }
1211
1212 enum {
1213 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1214 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1215 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1216 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1217 };
1218
1219 static match_table_t tokens = {
1220 {Opt_initiator_fabric, "initiator_fabric=%s"},
1221 {Opt_initiator_node, "initiator_node=%s"},
1222 {Opt_initiator_sid, "initiator_sid=%s"},
1223 {Opt_sa_res_key, "sa_res_key=%s"},
1224 {Opt_res_holder, "res_holder=%d"},
1225 {Opt_res_type, "res_type=%d"},
1226 {Opt_res_scope, "res_scope=%d"},
1227 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1228 {Opt_mapped_lun, "mapped_lun=%d"},
1229 {Opt_target_fabric, "target_fabric=%s"},
1230 {Opt_target_node, "target_node=%s"},
1231 {Opt_tpgt, "tpgt=%d"},
1232 {Opt_port_rtpi, "port_rtpi=%d"},
1233 {Opt_target_lun, "target_lun=%d"},
1234 {Opt_err, NULL}
1235 };
1236
1237 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1238 struct se_device *dev,
1239 const char *page,
1240 size_t count)
1241 {
1242 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1243 unsigned char *t_fabric = NULL, *t_port = NULL;
1244 char *orig, *ptr, *arg_p, *opts;
1245 substring_t args[MAX_OPT_ARGS];
1246 unsigned long long tmp_ll;
1247 u64 sa_res_key = 0;
1248 u32 mapped_lun = 0, target_lun = 0;
1249 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1250 u16 port_rpti = 0, tpgt = 0;
1251 u8 type = 0, scope;
1252
1253 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1254 return 0;
1255 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1256 return 0;
1257
1258 if (dev->export_count) {
1259 pr_debug("Unable to process APTPL metadata while"
1260 " active fabric exports exist\n");
1261 return -EINVAL;
1262 }
1263
1264 opts = kstrdup(page, GFP_KERNEL);
1265 if (!opts)
1266 return -ENOMEM;
1267
1268 orig = opts;
1269 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1270 if (!*ptr)
1271 continue;
1272
1273 token = match_token(ptr, tokens, args);
1274 switch (token) {
1275 case Opt_initiator_fabric:
1276 i_fabric = match_strdup(&args[0]);
1277 if (!i_fabric) {
1278 ret = -ENOMEM;
1279 goto out;
1280 }
1281 break;
1282 case Opt_initiator_node:
1283 i_port = match_strdup(&args[0]);
1284 if (!i_port) {
1285 ret = -ENOMEM;
1286 goto out;
1287 }
1288 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1289 pr_err("APTPL metadata initiator_node="
1290 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1291 PR_APTPL_MAX_IPORT_LEN);
1292 ret = -EINVAL;
1293 break;
1294 }
1295 break;
1296 case Opt_initiator_sid:
1297 isid = match_strdup(&args[0]);
1298 if (!isid) {
1299 ret = -ENOMEM;
1300 goto out;
1301 }
1302 if (strlen(isid) >= PR_REG_ISID_LEN) {
1303 pr_err("APTPL metadata initiator_isid"
1304 "= exceeds PR_REG_ISID_LEN: %d\n",
1305 PR_REG_ISID_LEN);
1306 ret = -EINVAL;
1307 break;
1308 }
1309 break;
1310 case Opt_sa_res_key:
1311 arg_p = match_strdup(&args[0]);
1312 if (!arg_p) {
1313 ret = -ENOMEM;
1314 goto out;
1315 }
1316 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1317 if (ret < 0) {
1318 pr_err("strict_strtoull() failed for"
1319 " sa_res_key=\n");
1320 goto out;
1321 }
1322 sa_res_key = (u64)tmp_ll;
1323 break;
1324 /*
1325 * PR APTPL Metadata for Reservation
1326 */
1327 case Opt_res_holder:
1328 match_int(args, &arg);
1329 res_holder = arg;
1330 break;
1331 case Opt_res_type:
1332 match_int(args, &arg);
1333 type = (u8)arg;
1334 break;
1335 case Opt_res_scope:
1336 match_int(args, &arg);
1337 scope = (u8)arg;
1338 break;
1339 case Opt_res_all_tg_pt:
1340 match_int(args, &arg);
1341 all_tg_pt = (int)arg;
1342 break;
1343 case Opt_mapped_lun:
1344 match_int(args, &arg);
1345 mapped_lun = (u32)arg;
1346 break;
1347 /*
1348 * PR APTPL Metadata for Target Port
1349 */
1350 case Opt_target_fabric:
1351 t_fabric = match_strdup(&args[0]);
1352 if (!t_fabric) {
1353 ret = -ENOMEM;
1354 goto out;
1355 }
1356 break;
1357 case Opt_target_node:
1358 t_port = match_strdup(&args[0]);
1359 if (!t_port) {
1360 ret = -ENOMEM;
1361 goto out;
1362 }
1363 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1364 pr_err("APTPL metadata target_node="
1365 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1366 PR_APTPL_MAX_TPORT_LEN);
1367 ret = -EINVAL;
1368 break;
1369 }
1370 break;
1371 case Opt_tpgt:
1372 match_int(args, &arg);
1373 tpgt = (u16)arg;
1374 break;
1375 case Opt_port_rtpi:
1376 match_int(args, &arg);
1377 port_rpti = (u16)arg;
1378 break;
1379 case Opt_target_lun:
1380 match_int(args, &arg);
1381 target_lun = (u32)arg;
1382 break;
1383 default:
1384 break;
1385 }
1386 }
1387
1388 if (!i_port || !t_port || !sa_res_key) {
1389 pr_err("Illegal parameters for APTPL registration\n");
1390 ret = -EINVAL;
1391 goto out;
1392 }
1393
1394 if (res_holder && !(type)) {
1395 pr_err("Illegal PR type: 0x%02x for reservation"
1396 " holder\n", type);
1397 ret = -EINVAL;
1398 goto out;
1399 }
1400
1401 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1402 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1403 res_holder, all_tg_pt, type);
1404 out:
1405 kfree(i_fabric);
1406 kfree(i_port);
1407 kfree(isid);
1408 kfree(t_fabric);
1409 kfree(t_port);
1410 kfree(orig);
1411 return (ret == 0) ? count : ret;
1412 }
1413
1414 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1415
1416 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1417
1418 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1419 &target_core_dev_pr_res_holder.attr,
1420 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1421 &target_core_dev_pr_res_pr_generation.attr,
1422 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1423 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1424 &target_core_dev_pr_res_pr_type.attr,
1425 &target_core_dev_pr_res_type.attr,
1426 &target_core_dev_pr_res_aptpl_active.attr,
1427 &target_core_dev_pr_res_aptpl_metadata.attr,
1428 NULL,
1429 };
1430
1431 static struct configfs_item_operations target_core_dev_pr_ops = {
1432 .show_attribute = target_core_dev_pr_attr_show,
1433 .store_attribute = target_core_dev_pr_attr_store,
1434 };
1435
1436 static struct config_item_type target_core_dev_pr_cit = {
1437 .ct_item_ops = &target_core_dev_pr_ops,
1438 .ct_attrs = target_core_dev_pr_attrs,
1439 .ct_owner = THIS_MODULE,
1440 };
1441
1442 /* End functions for struct config_item_type target_core_dev_pr_cit */
1443
1444 /* Start functions for struct config_item_type target_core_dev_cit */
1445
1446 static ssize_t target_core_show_dev_info(void *p, char *page)
1447 {
1448 struct se_device *dev = p;
1449 struct se_subsystem_api *t = dev->transport;
1450 int bl = 0;
1451 ssize_t read_bytes = 0;
1452
1453 transport_dump_dev_state(dev, page, &bl);
1454 read_bytes += bl;
1455 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1456 return read_bytes;
1457 }
1458
1459 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1460 .attr = { .ca_owner = THIS_MODULE,
1461 .ca_name = "info",
1462 .ca_mode = S_IRUGO },
1463 .show = target_core_show_dev_info,
1464 .store = NULL,
1465 };
1466
1467 static ssize_t target_core_store_dev_control(
1468 void *p,
1469 const char *page,
1470 size_t count)
1471 {
1472 struct se_device *dev = p;
1473 struct se_subsystem_api *t = dev->transport;
1474
1475 return t->set_configfs_dev_params(dev, page, count);
1476 }
1477
1478 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1479 .attr = { .ca_owner = THIS_MODULE,
1480 .ca_name = "control",
1481 .ca_mode = S_IWUSR },
1482 .show = NULL,
1483 .store = target_core_store_dev_control,
1484 };
1485
1486 static ssize_t target_core_show_dev_alias(void *p, char *page)
1487 {
1488 struct se_device *dev = p;
1489
1490 if (!(dev->dev_flags & DF_USING_ALIAS))
1491 return 0;
1492
1493 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1494 }
1495
1496 static ssize_t target_core_store_dev_alias(
1497 void *p,
1498 const char *page,
1499 size_t count)
1500 {
1501 struct se_device *dev = p;
1502 struct se_hba *hba = dev->se_hba;
1503 ssize_t read_bytes;
1504
1505 if (count > (SE_DEV_ALIAS_LEN-1)) {
1506 pr_err("alias count: %d exceeds"
1507 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1508 SE_DEV_ALIAS_LEN-1);
1509 return -EINVAL;
1510 }
1511
1512 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1513 if (!read_bytes)
1514 return -EINVAL;
1515 if (dev->dev_alias[read_bytes - 1] == '\n')
1516 dev->dev_alias[read_bytes - 1] = '\0';
1517
1518 dev->dev_flags |= DF_USING_ALIAS;
1519
1520 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1521 config_item_name(&hba->hba_group.cg_item),
1522 config_item_name(&dev->dev_group.cg_item),
1523 dev->dev_alias);
1524
1525 return read_bytes;
1526 }
1527
1528 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1529 .attr = { .ca_owner = THIS_MODULE,
1530 .ca_name = "alias",
1531 .ca_mode = S_IRUGO | S_IWUSR },
1532 .show = target_core_show_dev_alias,
1533 .store = target_core_store_dev_alias,
1534 };
1535
1536 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1537 {
1538 struct se_device *dev = p;
1539
1540 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1541 return 0;
1542
1543 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1544 }
1545
1546 static ssize_t target_core_store_dev_udev_path(
1547 void *p,
1548 const char *page,
1549 size_t count)
1550 {
1551 struct se_device *dev = p;
1552 struct se_hba *hba = dev->se_hba;
1553 ssize_t read_bytes;
1554
1555 if (count > (SE_UDEV_PATH_LEN-1)) {
1556 pr_err("udev_path count: %d exceeds"
1557 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1558 SE_UDEV_PATH_LEN-1);
1559 return -EINVAL;
1560 }
1561
1562 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1563 "%s", page);
1564 if (!read_bytes)
1565 return -EINVAL;
1566 if (dev->udev_path[read_bytes - 1] == '\n')
1567 dev->udev_path[read_bytes - 1] = '\0';
1568
1569 dev->dev_flags |= DF_USING_UDEV_PATH;
1570
1571 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1572 config_item_name(&hba->hba_group.cg_item),
1573 config_item_name(&dev->dev_group.cg_item),
1574 dev->udev_path);
1575
1576 return read_bytes;
1577 }
1578
1579 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1580 .attr = { .ca_owner = THIS_MODULE,
1581 .ca_name = "udev_path",
1582 .ca_mode = S_IRUGO | S_IWUSR },
1583 .show = target_core_show_dev_udev_path,
1584 .store = target_core_store_dev_udev_path,
1585 };
1586
1587 static ssize_t target_core_store_dev_enable(
1588 void *p,
1589 const char *page,
1590 size_t count)
1591 {
1592 struct se_device *dev = p;
1593 char *ptr;
1594 int ret;
1595
1596 ptr = strstr(page, "1");
1597 if (!ptr) {
1598 pr_err("For dev_enable ops, only valid value"
1599 " is \"1\"\n");
1600 return -EINVAL;
1601 }
1602
1603 ret = target_configure_device(dev);
1604 if (ret)
1605 return ret;
1606 return count;
1607 }
1608
1609 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1610 .attr = { .ca_owner = THIS_MODULE,
1611 .ca_name = "enable",
1612 .ca_mode = S_IWUSR },
1613 .show = NULL,
1614 .store = target_core_store_dev_enable,
1615 };
1616
1617 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1618 {
1619 struct se_device *dev = p;
1620 struct config_item *lu_ci;
1621 struct t10_alua_lu_gp *lu_gp;
1622 struct t10_alua_lu_gp_member *lu_gp_mem;
1623 ssize_t len = 0;
1624
1625 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1626 if (!lu_gp_mem)
1627 return 0;
1628
1629 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1630 lu_gp = lu_gp_mem->lu_gp;
1631 if (lu_gp) {
1632 lu_ci = &lu_gp->lu_gp_group.cg_item;
1633 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1634 config_item_name(lu_ci), lu_gp->lu_gp_id);
1635 }
1636 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1637
1638 return len;
1639 }
1640
1641 static ssize_t target_core_store_alua_lu_gp(
1642 void *p,
1643 const char *page,
1644 size_t count)
1645 {
1646 struct se_device *dev = p;
1647 struct se_hba *hba = dev->se_hba;
1648 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1649 struct t10_alua_lu_gp_member *lu_gp_mem;
1650 unsigned char buf[LU_GROUP_NAME_BUF];
1651 int move = 0;
1652
1653 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1654 if (!lu_gp_mem)
1655 return 0;
1656
1657 if (count > LU_GROUP_NAME_BUF) {
1658 pr_err("ALUA LU Group Alias too large!\n");
1659 return -EINVAL;
1660 }
1661 memset(buf, 0, LU_GROUP_NAME_BUF);
1662 memcpy(buf, page, count);
1663 /*
1664 * Any ALUA logical unit alias besides "NULL" means we will be
1665 * making a new group association.
1666 */
1667 if (strcmp(strstrip(buf), "NULL")) {
1668 /*
1669 * core_alua_get_lu_gp_by_name() will increment reference to
1670 * struct t10_alua_lu_gp. This reference is released with
1671 * core_alua_get_lu_gp_by_name below().
1672 */
1673 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1674 if (!lu_gp_new)
1675 return -ENODEV;
1676 }
1677
1678 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1679 lu_gp = lu_gp_mem->lu_gp;
1680 if (lu_gp) {
1681 /*
1682 * Clearing an existing lu_gp association, and replacing
1683 * with NULL
1684 */
1685 if (!lu_gp_new) {
1686 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1687 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1688 " %hu\n",
1689 config_item_name(&hba->hba_group.cg_item),
1690 config_item_name(&dev->dev_group.cg_item),
1691 config_item_name(&lu_gp->lu_gp_group.cg_item),
1692 lu_gp->lu_gp_id);
1693
1694 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1695 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1696
1697 return count;
1698 }
1699 /*
1700 * Removing existing association of lu_gp_mem with lu_gp
1701 */
1702 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1703 move = 1;
1704 }
1705 /*
1706 * Associate lu_gp_mem with lu_gp_new.
1707 */
1708 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1709 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1710
1711 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1712 " core/alua/lu_gps/%s, ID: %hu\n",
1713 (move) ? "Moving" : "Adding",
1714 config_item_name(&hba->hba_group.cg_item),
1715 config_item_name(&dev->dev_group.cg_item),
1716 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1717 lu_gp_new->lu_gp_id);
1718
1719 core_alua_put_lu_gp_from_name(lu_gp_new);
1720 return count;
1721 }
1722
1723 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1724 .attr = { .ca_owner = THIS_MODULE,
1725 .ca_name = "alua_lu_gp",
1726 .ca_mode = S_IRUGO | S_IWUSR },
1727 .show = target_core_show_alua_lu_gp,
1728 .store = target_core_store_alua_lu_gp,
1729 };
1730
1731 static struct configfs_attribute *lio_core_dev_attrs[] = {
1732 &target_core_attr_dev_info.attr,
1733 &target_core_attr_dev_control.attr,
1734 &target_core_attr_dev_alias.attr,
1735 &target_core_attr_dev_udev_path.attr,
1736 &target_core_attr_dev_enable.attr,
1737 &target_core_attr_dev_alua_lu_gp.attr,
1738 NULL,
1739 };
1740
1741 static void target_core_dev_release(struct config_item *item)
1742 {
1743 struct config_group *dev_cg = to_config_group(item);
1744 struct se_device *dev =
1745 container_of(dev_cg, struct se_device, dev_group);
1746
1747 kfree(dev_cg->default_groups);
1748 target_free_device(dev);
1749 }
1750
1751 static ssize_t target_core_dev_show(struct config_item *item,
1752 struct configfs_attribute *attr,
1753 char *page)
1754 {
1755 struct config_group *dev_cg = to_config_group(item);
1756 struct se_device *dev =
1757 container_of(dev_cg, struct se_device, dev_group);
1758 struct target_core_configfs_attribute *tc_attr = container_of(
1759 attr, struct target_core_configfs_attribute, attr);
1760
1761 if (!tc_attr->show)
1762 return -EINVAL;
1763
1764 return tc_attr->show(dev, page);
1765 }
1766
1767 static ssize_t target_core_dev_store(struct config_item *item,
1768 struct configfs_attribute *attr,
1769 const char *page, size_t count)
1770 {
1771 struct config_group *dev_cg = to_config_group(item);
1772 struct se_device *dev =
1773 container_of(dev_cg, struct se_device, dev_group);
1774 struct target_core_configfs_attribute *tc_attr = container_of(
1775 attr, struct target_core_configfs_attribute, attr);
1776
1777 if (!tc_attr->store)
1778 return -EINVAL;
1779
1780 return tc_attr->store(dev, page, count);
1781 }
1782
1783 static struct configfs_item_operations target_core_dev_item_ops = {
1784 .release = target_core_dev_release,
1785 .show_attribute = target_core_dev_show,
1786 .store_attribute = target_core_dev_store,
1787 };
1788
1789 static struct config_item_type target_core_dev_cit = {
1790 .ct_item_ops = &target_core_dev_item_ops,
1791 .ct_attrs = lio_core_dev_attrs,
1792 .ct_owner = THIS_MODULE,
1793 };
1794
1795 /* End functions for struct config_item_type target_core_dev_cit */
1796
1797 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1798
1799 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1800 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1801 static struct target_core_alua_lu_gp_attribute \
1802 target_core_alua_lu_gp_##_name = \
1803 __CONFIGFS_EATTR(_name, _mode, \
1804 target_core_alua_lu_gp_show_attr_##_name, \
1805 target_core_alua_lu_gp_store_attr_##_name);
1806
1807 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1808 static struct target_core_alua_lu_gp_attribute \
1809 target_core_alua_lu_gp_##_name = \
1810 __CONFIGFS_EATTR_RO(_name, \
1811 target_core_alua_lu_gp_show_attr_##_name);
1812
1813 /*
1814 * lu_gp_id
1815 */
1816 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1817 struct t10_alua_lu_gp *lu_gp,
1818 char *page)
1819 {
1820 if (!lu_gp->lu_gp_valid_id)
1821 return 0;
1822
1823 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1824 }
1825
1826 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1827 struct t10_alua_lu_gp *lu_gp,
1828 const char *page,
1829 size_t count)
1830 {
1831 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1832 unsigned long lu_gp_id;
1833 int ret;
1834
1835 ret = strict_strtoul(page, 0, &lu_gp_id);
1836 if (ret < 0) {
1837 pr_err("strict_strtoul() returned %d for"
1838 " lu_gp_id\n", ret);
1839 return -EINVAL;
1840 }
1841 if (lu_gp_id > 0x0000ffff) {
1842 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1843 " 0x0000ffff\n", lu_gp_id);
1844 return -EINVAL;
1845 }
1846
1847 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1848 if (ret < 0)
1849 return -EINVAL;
1850
1851 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1852 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1853 config_item_name(&alua_lu_gp_cg->cg_item),
1854 lu_gp->lu_gp_id);
1855
1856 return count;
1857 }
1858
1859 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1860
1861 /*
1862 * members
1863 */
1864 static ssize_t target_core_alua_lu_gp_show_attr_members(
1865 struct t10_alua_lu_gp *lu_gp,
1866 char *page)
1867 {
1868 struct se_device *dev;
1869 struct se_hba *hba;
1870 struct t10_alua_lu_gp_member *lu_gp_mem;
1871 ssize_t len = 0, cur_len;
1872 unsigned char buf[LU_GROUP_NAME_BUF];
1873
1874 memset(buf, 0, LU_GROUP_NAME_BUF);
1875
1876 spin_lock(&lu_gp->lu_gp_lock);
1877 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1878 dev = lu_gp_mem->lu_gp_mem_dev;
1879 hba = dev->se_hba;
1880
1881 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1882 config_item_name(&hba->hba_group.cg_item),
1883 config_item_name(&dev->dev_group.cg_item));
1884 cur_len++; /* Extra byte for NULL terminator */
1885
1886 if ((cur_len + len) > PAGE_SIZE) {
1887 pr_warn("Ran out of lu_gp_show_attr"
1888 "_members buffer\n");
1889 break;
1890 }
1891 memcpy(page+len, buf, cur_len);
1892 len += cur_len;
1893 }
1894 spin_unlock(&lu_gp->lu_gp_lock);
1895
1896 return len;
1897 }
1898
1899 SE_DEV_ALUA_LU_ATTR_RO(members);
1900
1901 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1902
1903 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1904 &target_core_alua_lu_gp_lu_gp_id.attr,
1905 &target_core_alua_lu_gp_members.attr,
1906 NULL,
1907 };
1908
1909 static void target_core_alua_lu_gp_release(struct config_item *item)
1910 {
1911 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1912 struct t10_alua_lu_gp, lu_gp_group);
1913
1914 core_alua_free_lu_gp(lu_gp);
1915 }
1916
1917 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1918 .release = target_core_alua_lu_gp_release,
1919 .show_attribute = target_core_alua_lu_gp_attr_show,
1920 .store_attribute = target_core_alua_lu_gp_attr_store,
1921 };
1922
1923 static struct config_item_type target_core_alua_lu_gp_cit = {
1924 .ct_item_ops = &target_core_alua_lu_gp_ops,
1925 .ct_attrs = target_core_alua_lu_gp_attrs,
1926 .ct_owner = THIS_MODULE,
1927 };
1928
1929 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
1930
1931 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
1932
1933 static struct config_group *target_core_alua_create_lu_gp(
1934 struct config_group *group,
1935 const char *name)
1936 {
1937 struct t10_alua_lu_gp *lu_gp;
1938 struct config_group *alua_lu_gp_cg = NULL;
1939 struct config_item *alua_lu_gp_ci = NULL;
1940
1941 lu_gp = core_alua_allocate_lu_gp(name, 0);
1942 if (IS_ERR(lu_gp))
1943 return NULL;
1944
1945 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1946 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1947
1948 config_group_init_type_name(alua_lu_gp_cg, name,
1949 &target_core_alua_lu_gp_cit);
1950
1951 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1952 " Group: core/alua/lu_gps/%s\n",
1953 config_item_name(alua_lu_gp_ci));
1954
1955 return alua_lu_gp_cg;
1956
1957 }
1958
1959 static void target_core_alua_drop_lu_gp(
1960 struct config_group *group,
1961 struct config_item *item)
1962 {
1963 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1964 struct t10_alua_lu_gp, lu_gp_group);
1965
1966 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1967 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1968 config_item_name(item), lu_gp->lu_gp_id);
1969 /*
1970 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
1971 * -> target_core_alua_lu_gp_release()
1972 */
1973 config_item_put(item);
1974 }
1975
1976 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1977 .make_group = &target_core_alua_create_lu_gp,
1978 .drop_item = &target_core_alua_drop_lu_gp,
1979 };
1980
1981 static struct config_item_type target_core_alua_lu_gps_cit = {
1982 .ct_item_ops = NULL,
1983 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1984 .ct_owner = THIS_MODULE,
1985 };
1986
1987 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
1988
1989 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
1990
1991 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
1992 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
1993 static struct target_core_alua_tg_pt_gp_attribute \
1994 target_core_alua_tg_pt_gp_##_name = \
1995 __CONFIGFS_EATTR(_name, _mode, \
1996 target_core_alua_tg_pt_gp_show_attr_##_name, \
1997 target_core_alua_tg_pt_gp_store_attr_##_name);
1998
1999 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2000 static struct target_core_alua_tg_pt_gp_attribute \
2001 target_core_alua_tg_pt_gp_##_name = \
2002 __CONFIGFS_EATTR_RO(_name, \
2003 target_core_alua_tg_pt_gp_show_attr_##_name);
2004
2005 /*
2006 * alua_access_state
2007 */
2008 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2009 struct t10_alua_tg_pt_gp *tg_pt_gp,
2010 char *page)
2011 {
2012 return sprintf(page, "%d\n",
2013 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2014 }
2015
2016 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2017 struct t10_alua_tg_pt_gp *tg_pt_gp,
2018 const char *page,
2019 size_t count)
2020 {
2021 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2022 unsigned long tmp;
2023 int new_state, ret;
2024
2025 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2026 pr_err("Unable to do implict ALUA on non valid"
2027 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2028 return -EINVAL;
2029 }
2030
2031 ret = strict_strtoul(page, 0, &tmp);
2032 if (ret < 0) {
2033 pr_err("Unable to extract new ALUA access state from"
2034 " %s\n", page);
2035 return -EINVAL;
2036 }
2037 new_state = (int)tmp;
2038
2039 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2040 pr_err("Unable to process implict configfs ALUA"
2041 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2042 return -EINVAL;
2043 }
2044
2045 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2046 NULL, NULL, new_state, 0);
2047 return (!ret) ? count : -EINVAL;
2048 }
2049
2050 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2051
2052 /*
2053 * alua_access_status
2054 */
2055 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2056 struct t10_alua_tg_pt_gp *tg_pt_gp,
2057 char *page)
2058 {
2059 return sprintf(page, "%s\n",
2060 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2061 }
2062
2063 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2064 struct t10_alua_tg_pt_gp *tg_pt_gp,
2065 const char *page,
2066 size_t count)
2067 {
2068 unsigned long tmp;
2069 int new_status, ret;
2070
2071 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2072 pr_err("Unable to do set ALUA access status on non"
2073 " valid tg_pt_gp ID: %hu\n",
2074 tg_pt_gp->tg_pt_gp_valid_id);
2075 return -EINVAL;
2076 }
2077
2078 ret = strict_strtoul(page, 0, &tmp);
2079 if (ret < 0) {
2080 pr_err("Unable to extract new ALUA access status"
2081 " from %s\n", page);
2082 return -EINVAL;
2083 }
2084 new_status = (int)tmp;
2085
2086 if ((new_status != ALUA_STATUS_NONE) &&
2087 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2088 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2089 pr_err("Illegal ALUA access status: 0x%02x\n",
2090 new_status);
2091 return -EINVAL;
2092 }
2093
2094 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2095 return count;
2096 }
2097
2098 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2099
2100 /*
2101 * alua_access_type
2102 */
2103 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2104 struct t10_alua_tg_pt_gp *tg_pt_gp,
2105 char *page)
2106 {
2107 return core_alua_show_access_type(tg_pt_gp, page);
2108 }
2109
2110 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2111 struct t10_alua_tg_pt_gp *tg_pt_gp,
2112 const char *page,
2113 size_t count)
2114 {
2115 return core_alua_store_access_type(tg_pt_gp, page, count);
2116 }
2117
2118 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2119
2120 /*
2121 * alua_write_metadata
2122 */
2123 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2124 struct t10_alua_tg_pt_gp *tg_pt_gp,
2125 char *page)
2126 {
2127 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2128 }
2129
2130 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2131 struct t10_alua_tg_pt_gp *tg_pt_gp,
2132 const char *page,
2133 size_t count)
2134 {
2135 unsigned long tmp;
2136 int ret;
2137
2138 ret = strict_strtoul(page, 0, &tmp);
2139 if (ret < 0) {
2140 pr_err("Unable to extract alua_write_metadata\n");
2141 return -EINVAL;
2142 }
2143
2144 if ((tmp != 0) && (tmp != 1)) {
2145 pr_err("Illegal value for alua_write_metadata:"
2146 " %lu\n", tmp);
2147 return -EINVAL;
2148 }
2149 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2150
2151 return count;
2152 }
2153
2154 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2155
2156
2157
2158 /*
2159 * nonop_delay_msecs
2160 */
2161 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2162 struct t10_alua_tg_pt_gp *tg_pt_gp,
2163 char *page)
2164 {
2165 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2166
2167 }
2168
2169 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2170 struct t10_alua_tg_pt_gp *tg_pt_gp,
2171 const char *page,
2172 size_t count)
2173 {
2174 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2175 }
2176
2177 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2178
2179 /*
2180 * trans_delay_msecs
2181 */
2182 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2183 struct t10_alua_tg_pt_gp *tg_pt_gp,
2184 char *page)
2185 {
2186 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2187 }
2188
2189 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2190 struct t10_alua_tg_pt_gp *tg_pt_gp,
2191 const char *page,
2192 size_t count)
2193 {
2194 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2195 }
2196
2197 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2198
2199 /*
2200 * implict_trans_secs
2201 */
2202 static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2203 struct t10_alua_tg_pt_gp *tg_pt_gp,
2204 char *page)
2205 {
2206 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2207 }
2208
2209 static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2210 struct t10_alua_tg_pt_gp *tg_pt_gp,
2211 const char *page,
2212 size_t count)
2213 {
2214 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2215 }
2216
2217 SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2218
2219 /*
2220 * preferred
2221 */
2222
2223 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2224 struct t10_alua_tg_pt_gp *tg_pt_gp,
2225 char *page)
2226 {
2227 return core_alua_show_preferred_bit(tg_pt_gp, page);
2228 }
2229
2230 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2231 struct t10_alua_tg_pt_gp *tg_pt_gp,
2232 const char *page,
2233 size_t count)
2234 {
2235 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2236 }
2237
2238 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2239
2240 /*
2241 * tg_pt_gp_id
2242 */
2243 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2244 struct t10_alua_tg_pt_gp *tg_pt_gp,
2245 char *page)
2246 {
2247 if (!tg_pt_gp->tg_pt_gp_valid_id)
2248 return 0;
2249
2250 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2251 }
2252
2253 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2254 struct t10_alua_tg_pt_gp *tg_pt_gp,
2255 const char *page,
2256 size_t count)
2257 {
2258 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2259 unsigned long tg_pt_gp_id;
2260 int ret;
2261
2262 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2263 if (ret < 0) {
2264 pr_err("strict_strtoul() returned %d for"
2265 " tg_pt_gp_id\n", ret);
2266 return -EINVAL;
2267 }
2268 if (tg_pt_gp_id > 0x0000ffff) {
2269 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2270 " 0x0000ffff\n", tg_pt_gp_id);
2271 return -EINVAL;
2272 }
2273
2274 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2275 if (ret < 0)
2276 return -EINVAL;
2277
2278 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2279 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2280 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2281 tg_pt_gp->tg_pt_gp_id);
2282
2283 return count;
2284 }
2285
2286 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2287
2288 /*
2289 * members
2290 */
2291 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2292 struct t10_alua_tg_pt_gp *tg_pt_gp,
2293 char *page)
2294 {
2295 struct se_port *port;
2296 struct se_portal_group *tpg;
2297 struct se_lun *lun;
2298 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2299 ssize_t len = 0, cur_len;
2300 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2301
2302 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2303
2304 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2305 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2306 tg_pt_gp_mem_list) {
2307 port = tg_pt_gp_mem->tg_pt;
2308 tpg = port->sep_tpg;
2309 lun = port->sep_lun;
2310
2311 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2312 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2313 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2314 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2315 config_item_name(&lun->lun_group.cg_item));
2316 cur_len++; /* Extra byte for NULL terminator */
2317
2318 if ((cur_len + len) > PAGE_SIZE) {
2319 pr_warn("Ran out of lu_gp_show_attr"
2320 "_members buffer\n");
2321 break;
2322 }
2323 memcpy(page+len, buf, cur_len);
2324 len += cur_len;
2325 }
2326 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2327
2328 return len;
2329 }
2330
2331 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2332
2333 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2334 tg_pt_gp_group);
2335
2336 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2337 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2338 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2339 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2340 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2341 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2342 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2343 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2344 &target_core_alua_tg_pt_gp_preferred.attr,
2345 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2346 &target_core_alua_tg_pt_gp_members.attr,
2347 NULL,
2348 };
2349
2350 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2351 {
2352 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2353 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2354
2355 core_alua_free_tg_pt_gp(tg_pt_gp);
2356 }
2357
2358 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2359 .release = target_core_alua_tg_pt_gp_release,
2360 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2361 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2362 };
2363
2364 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2365 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2366 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2367 .ct_owner = THIS_MODULE,
2368 };
2369
2370 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2371
2372 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2373
2374 static struct config_group *target_core_alua_create_tg_pt_gp(
2375 struct config_group *group,
2376 const char *name)
2377 {
2378 struct t10_alua *alua = container_of(group, struct t10_alua,
2379 alua_tg_pt_gps_group);
2380 struct t10_alua_tg_pt_gp *tg_pt_gp;
2381 struct config_group *alua_tg_pt_gp_cg = NULL;
2382 struct config_item *alua_tg_pt_gp_ci = NULL;
2383
2384 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2385 if (!tg_pt_gp)
2386 return NULL;
2387
2388 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2389 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2390
2391 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2392 &target_core_alua_tg_pt_gp_cit);
2393
2394 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2395 " Group: alua/tg_pt_gps/%s\n",
2396 config_item_name(alua_tg_pt_gp_ci));
2397
2398 return alua_tg_pt_gp_cg;
2399 }
2400
2401 static void target_core_alua_drop_tg_pt_gp(
2402 struct config_group *group,
2403 struct config_item *item)
2404 {
2405 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2406 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2407
2408 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2409 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2410 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2411 /*
2412 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2413 * -> target_core_alua_tg_pt_gp_release().
2414 */
2415 config_item_put(item);
2416 }
2417
2418 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2419 .make_group = &target_core_alua_create_tg_pt_gp,
2420 .drop_item = &target_core_alua_drop_tg_pt_gp,
2421 };
2422
2423 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2424 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2425 .ct_owner = THIS_MODULE,
2426 };
2427
2428 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2429
2430 /* Start functions for struct config_item_type target_core_alua_cit */
2431
2432 /*
2433 * target_core_alua_cit is a ConfigFS group that lives under
2434 * /sys/kernel/config/target/core/alua. There are default groups
2435 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2436 * target_core_alua_cit in target_core_init_configfs() below.
2437 */
2438 static struct config_item_type target_core_alua_cit = {
2439 .ct_item_ops = NULL,
2440 .ct_attrs = NULL,
2441 .ct_owner = THIS_MODULE,
2442 };
2443
2444 /* End functions for struct config_item_type target_core_alua_cit */
2445
2446 /* Start functions for struct config_item_type target_core_stat_cit */
2447
2448 static struct config_group *target_core_stat_mkdir(
2449 struct config_group *group,
2450 const char *name)
2451 {
2452 return ERR_PTR(-ENOSYS);
2453 }
2454
2455 static void target_core_stat_rmdir(
2456 struct config_group *group,
2457 struct config_item *item)
2458 {
2459 return;
2460 }
2461
2462 static struct configfs_group_operations target_core_stat_group_ops = {
2463 .make_group = &target_core_stat_mkdir,
2464 .drop_item = &target_core_stat_rmdir,
2465 };
2466
2467 static struct config_item_type target_core_stat_cit = {
2468 .ct_group_ops = &target_core_stat_group_ops,
2469 .ct_owner = THIS_MODULE,
2470 };
2471
2472 /* End functions for struct config_item_type target_core_stat_cit */
2473
2474 /* Start functions for struct config_item_type target_core_hba_cit */
2475
2476 static struct config_group *target_core_make_subdev(
2477 struct config_group *group,
2478 const char *name)
2479 {
2480 struct t10_alua_tg_pt_gp *tg_pt_gp;
2481 struct se_subsystem_api *t;
2482 struct config_item *hba_ci = &group->cg_item;
2483 struct se_hba *hba = item_to_hba(hba_ci);
2484 struct se_device *dev;
2485 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2486 struct config_group *dev_stat_grp = NULL;
2487 int errno = -ENOMEM, ret;
2488
2489 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2490 if (ret)
2491 return ERR_PTR(ret);
2492 /*
2493 * Locate the struct se_subsystem_api from parent's struct se_hba.
2494 */
2495 t = hba->transport;
2496
2497 dev = target_alloc_device(hba, name);
2498 if (!dev)
2499 goto out_unlock;
2500
2501 dev_cg = &dev->dev_group;
2502
2503 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2504 GFP_KERNEL);
2505 if (!dev_cg->default_groups)
2506 goto out_free_device;
2507
2508 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2509 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2510 &target_core_dev_attrib_cit);
2511 config_group_init_type_name(&dev->dev_pr_group, "pr",
2512 &target_core_dev_pr_cit);
2513 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2514 &target_core_dev_wwn_cit);
2515 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2516 "alua", &target_core_alua_tg_pt_gps_cit);
2517 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2518 "statistics", &target_core_stat_cit);
2519
2520 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2521 dev_cg->default_groups[1] = &dev->dev_pr_group;
2522 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2523 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2524 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2525 dev_cg->default_groups[5] = NULL;
2526 /*
2527 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2528 */
2529 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2530 if (!tg_pt_gp)
2531 goto out_free_dev_cg_default_groups;
2532 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2533
2534 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2535 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2536 GFP_KERNEL);
2537 if (!tg_pt_gp_cg->default_groups) {
2538 pr_err("Unable to allocate tg_pt_gp_cg->"
2539 "default_groups\n");
2540 goto out_free_tg_pt_gp;
2541 }
2542
2543 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2544 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2545 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2546 tg_pt_gp_cg->default_groups[1] = NULL;
2547 /*
2548 * Add core/$HBA/$DEV/statistics/ default groups
2549 */
2550 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2551 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2552 GFP_KERNEL);
2553 if (!dev_stat_grp->default_groups) {
2554 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2555 goto out_free_tg_pt_gp_cg_default_groups;
2556 }
2557 target_stat_setup_dev_default_groups(dev);
2558
2559 mutex_unlock(&hba->hba_access_mutex);
2560 return dev_cg;
2561
2562 out_free_tg_pt_gp_cg_default_groups:
2563 kfree(tg_pt_gp_cg->default_groups);
2564 out_free_tg_pt_gp:
2565 core_alua_free_tg_pt_gp(tg_pt_gp);
2566 out_free_dev_cg_default_groups:
2567 kfree(dev_cg->default_groups);
2568 out_free_device:
2569 target_free_device(dev);
2570 out_unlock:
2571 mutex_unlock(&hba->hba_access_mutex);
2572 return ERR_PTR(errno);
2573 }
2574
2575 static void target_core_drop_subdev(
2576 struct config_group *group,
2577 struct config_item *item)
2578 {
2579 struct config_group *dev_cg = to_config_group(item);
2580 struct se_device *dev =
2581 container_of(dev_cg, struct se_device, dev_group);
2582 struct se_hba *hba;
2583 struct config_item *df_item;
2584 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2585 int i;
2586
2587 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2588
2589 mutex_lock(&hba->hba_access_mutex);
2590
2591 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2592 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2593 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2594 dev_stat_grp->default_groups[i] = NULL;
2595 config_item_put(df_item);
2596 }
2597 kfree(dev_stat_grp->default_groups);
2598
2599 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2600 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2601 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2602 tg_pt_gp_cg->default_groups[i] = NULL;
2603 config_item_put(df_item);
2604 }
2605 kfree(tg_pt_gp_cg->default_groups);
2606 /*
2607 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2608 * directly from target_core_alua_tg_pt_gp_release().
2609 */
2610 dev->t10_alua.default_tg_pt_gp = NULL;
2611
2612 for (i = 0; dev_cg->default_groups[i]; i++) {
2613 df_item = &dev_cg->default_groups[i]->cg_item;
2614 dev_cg->default_groups[i] = NULL;
2615 config_item_put(df_item);
2616 }
2617 /*
2618 * se_dev is released from target_core_dev_item_ops->release()
2619 */
2620 config_item_put(item);
2621 mutex_unlock(&hba->hba_access_mutex);
2622 }
2623
2624 static struct configfs_group_operations target_core_hba_group_ops = {
2625 .make_group = target_core_make_subdev,
2626 .drop_item = target_core_drop_subdev,
2627 };
2628
2629 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2630 #define SE_HBA_ATTR(_name, _mode) \
2631 static struct target_core_hba_attribute \
2632 target_core_hba_##_name = \
2633 __CONFIGFS_EATTR(_name, _mode, \
2634 target_core_hba_show_attr_##_name, \
2635 target_core_hba_store_attr_##_name);
2636
2637 #define SE_HBA_ATTR_RO(_name) \
2638 static struct target_core_hba_attribute \
2639 target_core_hba_##_name = \
2640 __CONFIGFS_EATTR_RO(_name, \
2641 target_core_hba_show_attr_##_name);
2642
2643 static ssize_t target_core_hba_show_attr_hba_info(
2644 struct se_hba *hba,
2645 char *page)
2646 {
2647 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2648 hba->hba_id, hba->transport->name,
2649 TARGET_CORE_CONFIGFS_VERSION);
2650 }
2651
2652 SE_HBA_ATTR_RO(hba_info);
2653
2654 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2655 char *page)
2656 {
2657 int hba_mode = 0;
2658
2659 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2660 hba_mode = 1;
2661
2662 return sprintf(page, "%d\n", hba_mode);
2663 }
2664
2665 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2666 const char *page, size_t count)
2667 {
2668 struct se_subsystem_api *transport = hba->transport;
2669 unsigned long mode_flag;
2670 int ret;
2671
2672 if (transport->pmode_enable_hba == NULL)
2673 return -EINVAL;
2674
2675 ret = strict_strtoul(page, 0, &mode_flag);
2676 if (ret < 0) {
2677 pr_err("Unable to extract hba mode flag: %d\n", ret);
2678 return -EINVAL;
2679 }
2680
2681 if (hba->dev_count) {
2682 pr_err("Unable to set hba_mode with active devices\n");
2683 return -EINVAL;
2684 }
2685
2686 ret = transport->pmode_enable_hba(hba, mode_flag);
2687 if (ret < 0)
2688 return -EINVAL;
2689 if (ret > 0)
2690 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2691 else if (ret == 0)
2692 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2693
2694 return count;
2695 }
2696
2697 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2698
2699 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2700
2701 static void target_core_hba_release(struct config_item *item)
2702 {
2703 struct se_hba *hba = container_of(to_config_group(item),
2704 struct se_hba, hba_group);
2705 core_delete_hba(hba);
2706 }
2707
2708 static struct configfs_attribute *target_core_hba_attrs[] = {
2709 &target_core_hba_hba_info.attr,
2710 &target_core_hba_hba_mode.attr,
2711 NULL,
2712 };
2713
2714 static struct configfs_item_operations target_core_hba_item_ops = {
2715 .release = target_core_hba_release,
2716 .show_attribute = target_core_hba_attr_show,
2717 .store_attribute = target_core_hba_attr_store,
2718 };
2719
2720 static struct config_item_type target_core_hba_cit = {
2721 .ct_item_ops = &target_core_hba_item_ops,
2722 .ct_group_ops = &target_core_hba_group_ops,
2723 .ct_attrs = target_core_hba_attrs,
2724 .ct_owner = THIS_MODULE,
2725 };
2726
2727 static struct config_group *target_core_call_addhbatotarget(
2728 struct config_group *group,
2729 const char *name)
2730 {
2731 char *se_plugin_str, *str, *str2;
2732 struct se_hba *hba;
2733 char buf[TARGET_CORE_NAME_MAX_LEN];
2734 unsigned long plugin_dep_id = 0;
2735 int ret;
2736
2737 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2738 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2739 pr_err("Passed *name strlen(): %d exceeds"
2740 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2741 TARGET_CORE_NAME_MAX_LEN);
2742 return ERR_PTR(-ENAMETOOLONG);
2743 }
2744 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2745
2746 str = strstr(buf, "_");
2747 if (!str) {
2748 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2749 return ERR_PTR(-EINVAL);
2750 }
2751 se_plugin_str = buf;
2752 /*
2753 * Special case for subsystem plugins that have "_" in their names.
2754 * Namely rd_direct and rd_mcp..
2755 */
2756 str2 = strstr(str+1, "_");
2757 if (str2) {
2758 *str2 = '\0'; /* Terminate for *se_plugin_str */
2759 str2++; /* Skip to start of plugin dependent ID */
2760 str = str2;
2761 } else {
2762 *str = '\0'; /* Terminate for *se_plugin_str */
2763 str++; /* Skip to start of plugin dependent ID */
2764 }
2765
2766 ret = strict_strtoul(str, 0, &plugin_dep_id);
2767 if (ret < 0) {
2768 pr_err("strict_strtoul() returned %d for"
2769 " plugin_dep_id\n", ret);
2770 return ERR_PTR(-EINVAL);
2771 }
2772 /*
2773 * Load up TCM subsystem plugins if they have not already been loaded.
2774 */
2775 transport_subsystem_check_init();
2776
2777 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2778 if (IS_ERR(hba))
2779 return ERR_CAST(hba);
2780
2781 config_group_init_type_name(&hba->hba_group, name,
2782 &target_core_hba_cit);
2783
2784 return &hba->hba_group;
2785 }
2786
2787 static void target_core_call_delhbafromtarget(
2788 struct config_group *group,
2789 struct config_item *item)
2790 {
2791 /*
2792 * core_delete_hba() is called from target_core_hba_item_ops->release()
2793 * -> target_core_hba_release()
2794 */
2795 config_item_put(item);
2796 }
2797
2798 static struct configfs_group_operations target_core_group_ops = {
2799 .make_group = target_core_call_addhbatotarget,
2800 .drop_item = target_core_call_delhbafromtarget,
2801 };
2802
2803 static struct config_item_type target_core_cit = {
2804 .ct_item_ops = NULL,
2805 .ct_group_ops = &target_core_group_ops,
2806 .ct_attrs = NULL,
2807 .ct_owner = THIS_MODULE,
2808 };
2809
2810 /* Stop functions for struct config_item_type target_core_hba_cit */
2811
2812 static int __init target_core_init_configfs(void)
2813 {
2814 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2815 struct config_group *lu_gp_cg = NULL;
2816 struct configfs_subsystem *subsys;
2817 struct t10_alua_lu_gp *lu_gp;
2818 int ret;
2819
2820 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2821 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2822 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2823
2824 subsys = target_core_subsystem[0];
2825 config_group_init(&subsys->su_group);
2826 mutex_init(&subsys->su_mutex);
2827
2828 ret = init_se_kmem_caches();
2829 if (ret < 0)
2830 return ret;
2831 /*
2832 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
2833 * and ALUA Logical Unit Group and Target Port Group infrastructure.
2834 */
2835 target_cg = &subsys->su_group;
2836 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2837 GFP_KERNEL);
2838 if (!target_cg->default_groups) {
2839 pr_err("Unable to allocate target_cg->default_groups\n");
2840 ret = -ENOMEM;
2841 goto out_global;
2842 }
2843
2844 config_group_init_type_name(&target_core_hbagroup,
2845 "core", &target_core_cit);
2846 target_cg->default_groups[0] = &target_core_hbagroup;
2847 target_cg->default_groups[1] = NULL;
2848 /*
2849 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
2850 */
2851 hba_cg = &target_core_hbagroup;
2852 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2853 GFP_KERNEL);
2854 if (!hba_cg->default_groups) {
2855 pr_err("Unable to allocate hba_cg->default_groups\n");
2856 ret = -ENOMEM;
2857 goto out_global;
2858 }
2859 config_group_init_type_name(&alua_group,
2860 "alua", &target_core_alua_cit);
2861 hba_cg->default_groups[0] = &alua_group;
2862 hba_cg->default_groups[1] = NULL;
2863 /*
2864 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
2865 * groups under /sys/kernel/config/target/core/alua/
2866 */
2867 alua_cg = &alua_group;
2868 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2869 GFP_KERNEL);
2870 if (!alua_cg->default_groups) {
2871 pr_err("Unable to allocate alua_cg->default_groups\n");
2872 ret = -ENOMEM;
2873 goto out_global;
2874 }
2875
2876 config_group_init_type_name(&alua_lu_gps_group,
2877 "lu_gps", &target_core_alua_lu_gps_cit);
2878 alua_cg->default_groups[0] = &alua_lu_gps_group;
2879 alua_cg->default_groups[1] = NULL;
2880 /*
2881 * Add core/alua/lu_gps/default_lu_gp
2882 */
2883 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2884 if (IS_ERR(lu_gp)) {
2885 ret = -ENOMEM;
2886 goto out_global;
2887 }
2888
2889 lu_gp_cg = &alua_lu_gps_group;
2890 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2891 GFP_KERNEL);
2892 if (!lu_gp_cg->default_groups) {
2893 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2894 ret = -ENOMEM;
2895 goto out_global;
2896 }
2897
2898 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2899 &target_core_alua_lu_gp_cit);
2900 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2901 lu_gp_cg->default_groups[1] = NULL;
2902 default_lu_gp = lu_gp;
2903 /*
2904 * Register the target_core_mod subsystem with configfs.
2905 */
2906 ret = configfs_register_subsystem(subsys);
2907 if (ret < 0) {
2908 pr_err("Error %d while registering subsystem %s\n",
2909 ret, subsys->su_group.cg_item.ci_namebuf);
2910 goto out_global;
2911 }
2912 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2913 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2914 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2915 /*
2916 * Register built-in RAMDISK subsystem logic for virtual LUN 0
2917 */
2918 ret = rd_module_init();
2919 if (ret < 0)
2920 goto out;
2921
2922 ret = core_dev_setup_virtual_lun0();
2923 if (ret < 0)
2924 goto out;
2925
2926 return 0;
2927
2928 out:
2929 configfs_unregister_subsystem(subsys);
2930 core_dev_release_virtual_lun0();
2931 rd_module_exit();
2932 out_global:
2933 if (default_lu_gp) {
2934 core_alua_free_lu_gp(default_lu_gp);
2935 default_lu_gp = NULL;
2936 }
2937 if (lu_gp_cg)
2938 kfree(lu_gp_cg->default_groups);
2939 if (alua_cg)
2940 kfree(alua_cg->default_groups);
2941 if (hba_cg)
2942 kfree(hba_cg->default_groups);
2943 kfree(target_cg->default_groups);
2944 release_se_kmem_caches();
2945 return ret;
2946 }
2947
2948 static void __exit target_core_exit_configfs(void)
2949 {
2950 struct configfs_subsystem *subsys;
2951 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2952 struct config_item *item;
2953 int i;
2954
2955 subsys = target_core_subsystem[0];
2956
2957 lu_gp_cg = &alua_lu_gps_group;
2958 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2959 item = &lu_gp_cg->default_groups[i]->cg_item;
2960 lu_gp_cg->default_groups[i] = NULL;
2961 config_item_put(item);
2962 }
2963 kfree(lu_gp_cg->default_groups);
2964 lu_gp_cg->default_groups = NULL;
2965
2966 alua_cg = &alua_group;
2967 for (i = 0; alua_cg->default_groups[i]; i++) {
2968 item = &alua_cg->default_groups[i]->cg_item;
2969 alua_cg->default_groups[i] = NULL;
2970 config_item_put(item);
2971 }
2972 kfree(alua_cg->default_groups);
2973 alua_cg->default_groups = NULL;
2974
2975 hba_cg = &target_core_hbagroup;
2976 for (i = 0; hba_cg->default_groups[i]; i++) {
2977 item = &hba_cg->default_groups[i]->cg_item;
2978 hba_cg->default_groups[i] = NULL;
2979 config_item_put(item);
2980 }
2981 kfree(hba_cg->default_groups);
2982 hba_cg->default_groups = NULL;
2983 /*
2984 * We expect subsys->su_group.default_groups to be released
2985 * by configfs subsystem provider logic..
2986 */
2987 configfs_unregister_subsystem(subsys);
2988 kfree(subsys->su_group.default_groups);
2989
2990 core_alua_free_lu_gp(default_lu_gp);
2991 default_lu_gp = NULL;
2992
2993 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
2994 " Infrastructure\n");
2995
2996 core_dev_release_virtual_lun0();
2997 rd_module_exit();
2998 release_se_kmem_caches();
2999 }
3000
3001 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3002 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3003 MODULE_LICENSE("GPL");
3004
3005 module_init(target_core_init_configfs);
3006 module_exit(target_core_exit_configfs);
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