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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
53extern struct t10_alua_lu_gp *default_lu_gp;
54
55static LIST_HEAD(g_tf_list);
56static DEFINE_MUTEX(g_tf_lock);
57
58struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62};
63
64static struct config_group target_core_hbagroup;
65static struct config_group alua_group;
66static struct config_group alua_lu_gps_group;
67
68static inline struct se_hba *
69item_to_hba(struct config_item *item)
70{
71 return container_of(to_config_group(item), struct se_hba, hba_group);
72}
73
74
75
76
77static ssize_t target_core_attr_show(struct config_item *item,
78 struct configfs_attribute *attr,
79 char *page)
80{
81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
83 utsname()->sysname, utsname()->machine);
84}
85
86static struct configfs_item_operations target_core_fabric_item_ops = {
87 .show_attribute = target_core_attr_show,
88};
89
90static struct configfs_attribute target_core_item_attr_version = {
91 .ca_owner = THIS_MODULE,
92 .ca_name = "version",
93 .ca_mode = S_IRUGO,
94};
95
96static struct target_fabric_configfs *target_core_get_fabric(
97 const char *name)
98{
99 struct target_fabric_configfs *tf;
100
101 if (!name)
102 return NULL;
103
104 mutex_lock(&g_tf_lock);
105 list_for_each_entry(tf, &g_tf_list, tf_list) {
106 if (!strcmp(tf->tf_name, name)) {
107 atomic_inc(&tf->tf_access_cnt);
108 mutex_unlock(&g_tf_lock);
109 return tf;
110 }
111 }
112 mutex_unlock(&g_tf_lock);
113
114 return NULL;
115}
116
117
118
119
120static struct config_group *target_core_register_fabric(
121 struct config_group *group,
122 const char *name)
123{
124 struct target_fabric_configfs *tf;
125 int ret;
126
127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
128 " %s\n", group, name);
129
130
131
132
133
134
135
136
137
138
139 if (!strncmp(name, "iscsi", 5)) {
140
141
142
143
144
145
146 ret = request_module("iscsi_target_mod");
147 if (ret < 0) {
148 pr_err("request_module() failed for"
149 " iscsi_target_mod.ko: %d\n", ret);
150 return ERR_PTR(-EINVAL);
151 }
152 } else if (!strncmp(name, "loopback", 8)) {
153
154
155
156
157
158
159 ret = request_module("tcm_loop");
160 if (ret < 0) {
161 pr_err("request_module() failed for"
162 " tcm_loop.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 }
166
167 tf = target_core_get_fabric(name);
168 if (!tf) {
169 pr_err("target_core_get_fabric() failed for %s\n",
170 name);
171 return ERR_PTR(-EINVAL);
172 }
173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
174 " %s\n", tf->tf_name);
175
176
177
178
179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
180 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
181
182 tf->tf_group.default_groups = tf->tf_default_groups;
183 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
184 tf->tf_group.default_groups[1] = NULL;
185
186 config_group_init_type_name(&tf->tf_group, name,
187 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
189 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
190
191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
192 " %s\n", tf->tf_group.cg_item.ci_name);
193
194
195
196 tf->tf_ops.tf_subsys = tf->tf_subsys;
197 tf->tf_fabric = &tf->tf_group.cg_item;
198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
199 " for %s\n", name);
200
201 return &tf->tf_group;
202}
203
204
205
206
207static void target_core_deregister_fabric(
208 struct config_group *group,
209 struct config_item *item)
210{
211 struct target_fabric_configfs *tf = container_of(
212 to_config_group(item), struct target_fabric_configfs, tf_group);
213 struct config_group *tf_group;
214 struct config_item *df_item;
215 int i;
216
217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
218 " tf list\n", config_item_name(item));
219
220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
221 " %s\n", tf->tf_name);
222 atomic_dec(&tf->tf_access_cnt);
223
224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
225 " tf->tf_fabric for %s\n", tf->tf_name);
226 tf->tf_fabric = NULL;
227
228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
229 " %s\n", config_item_name(item));
230
231 tf_group = &tf->tf_group;
232 for (i = 0; tf_group->default_groups[i]; i++) {
233 df_item = &tf_group->default_groups[i]->cg_item;
234 tf_group->default_groups[i] = NULL;
235 config_item_put(df_item);
236 }
237 config_item_put(item);
238}
239
240static struct configfs_group_operations target_core_fabric_group_ops = {
241 .make_group = &target_core_register_fabric,
242 .drop_item = &target_core_deregister_fabric,
243};
244
245
246
247
248static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249 &target_core_item_attr_version,
250 NULL,
251};
252
253
254
255
256static struct config_item_type target_core_fabrics_item = {
257 .ct_item_ops = &target_core_fabric_item_ops,
258 .ct_group_ops = &target_core_fabric_group_ops,
259 .ct_attrs = target_core_fabric_item_attrs,
260 .ct_owner = THIS_MODULE,
261};
262
263static struct configfs_subsystem target_core_fabrics = {
264 .su_group = {
265 .cg_item = {
266 .ci_namebuf = "target",
267 .ci_type = &target_core_fabrics_item,
268 },
269 },
270};
271
272struct configfs_subsystem *target_core_subsystem[] = {
273 &target_core_fabrics,
274 NULL,
275};
276
277
278
279
280
281
282
283
284
285
286
287
288
289struct target_fabric_configfs *target_fabric_configfs_init(
290 struct module *fabric_mod,
291 const char *name)
292{
293 struct target_fabric_configfs *tf;
294
295 if (!(name)) {
296 pr_err("Unable to locate passed fabric name\n");
297 return ERR_PTR(-EINVAL);
298 }
299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
301 "_NAME_SIZE\n", name);
302 return ERR_PTR(-EINVAL);
303 }
304
305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
306 if (!tf)
307 return ERR_PTR(-ENOMEM);
308
309 INIT_LIST_HEAD(&tf->tf_list);
310 atomic_set(&tf->tf_access_cnt, 0);
311
312
313
314
315 tf->tf_module = fabric_mod;
316 target_fabric_setup_cits(tf);
317
318 tf->tf_subsys = target_core_subsystem[0];
319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
320
321 mutex_lock(&g_tf_lock);
322 list_add_tail(&tf->tf_list, &g_tf_list);
323 mutex_unlock(&g_tf_lock);
324
325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
326 ">>>>>>>>>>>>>>\n");
327 pr_debug("Initialized struct target_fabric_configfs: %p for"
328 " %s\n", tf, tf->tf_name);
329 return tf;
330}
331EXPORT_SYMBOL(target_fabric_configfs_init);
332
333
334
335
336void target_fabric_configfs_free(
337 struct target_fabric_configfs *tf)
338{
339 mutex_lock(&g_tf_lock);
340 list_del(&tf->tf_list);
341 mutex_unlock(&g_tf_lock);
342
343 kfree(tf);
344}
345EXPORT_SYMBOL(target_fabric_configfs_free);
346
347
348
349
350
351static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs *tf)
353{
354 struct target_core_fabric_ops *tfo = &tf->tf_ops;
355
356 if (!tfo->get_fabric_name) {
357 pr_err("Missing tfo->get_fabric_name()\n");
358 return -EINVAL;
359 }
360 if (!tfo->get_fabric_proto_ident) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_get_default_depth) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_get_pr_transport_id) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_pr_transport_id_len) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
382 return -EINVAL;
383 }
384 if (!tfo->tpg_check_demo_mode) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
386 return -EINVAL;
387 }
388 if (!tfo->tpg_check_demo_mode_cache) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
390 return -EINVAL;
391 }
392 if (!tfo->tpg_check_demo_mode_write_protect) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
394 return -EINVAL;
395 }
396 if (!tfo->tpg_check_prod_mode_write_protect) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
398 return -EINVAL;
399 }
400 if (!tfo->tpg_alloc_fabric_acl) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
402 return -EINVAL;
403 }
404 if (!tfo->tpg_release_fabric_acl) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
406 return -EINVAL;
407 }
408 if (!tfo->tpg_get_inst_index) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
410 return -EINVAL;
411 }
412 if (!tfo->release_cmd) {
413 pr_err("Missing tfo->release_cmd()\n");
414 return -EINVAL;
415 }
416 if (!tfo->shutdown_session) {
417 pr_err("Missing tfo->shutdown_session()\n");
418 return -EINVAL;
419 }
420 if (!tfo->close_session) {
421 pr_err("Missing tfo->close_session()\n");
422 return -EINVAL;
423 }
424 if (!tfo->sess_get_index) {
425 pr_err("Missing tfo->sess_get_index()\n");
426 return -EINVAL;
427 }
428 if (!tfo->write_pending) {
429 pr_err("Missing tfo->write_pending()\n");
430 return -EINVAL;
431 }
432 if (!tfo->write_pending_status) {
433 pr_err("Missing tfo->write_pending_status()\n");
434 return -EINVAL;
435 }
436 if (!tfo->set_default_node_attributes) {
437 pr_err("Missing tfo->set_default_node_attributes()\n");
438 return -EINVAL;
439 }
440 if (!tfo->get_task_tag) {
441 pr_err("Missing tfo->get_task_tag()\n");
442 return -EINVAL;
443 }
444 if (!tfo->get_cmd_state) {
445 pr_err("Missing tfo->get_cmd_state()\n");
446 return -EINVAL;
447 }
448 if (!tfo->queue_data_in) {
449 pr_err("Missing tfo->queue_data_in()\n");
450 return -EINVAL;
451 }
452 if (!tfo->queue_status) {
453 pr_err("Missing tfo->queue_status()\n");
454 return -EINVAL;
455 }
456 if (!tfo->queue_tm_rsp) {
457 pr_err("Missing tfo->queue_tm_rsp()\n");
458 return -EINVAL;
459 }
460
461
462
463
464
465 if (!tfo->fabric_make_wwn) {
466 pr_err("Missing tfo->fabric_make_wwn()\n");
467 return -EINVAL;
468 }
469 if (!tfo->fabric_drop_wwn) {
470 pr_err("Missing tfo->fabric_drop_wwn()\n");
471 return -EINVAL;
472 }
473 if (!tfo->fabric_make_tpg) {
474 pr_err("Missing tfo->fabric_make_tpg()\n");
475 return -EINVAL;
476 }
477 if (!tfo->fabric_drop_tpg) {
478 pr_err("Missing tfo->fabric_drop_tpg()\n");
479 return -EINVAL;
480 }
481
482 return 0;
483}
484
485
486
487
488
489
490
491
492
493int target_fabric_configfs_register(
494 struct target_fabric_configfs *tf)
495{
496 int ret;
497
498 if (!tf) {
499 pr_err("Unable to locate target_fabric_configfs"
500 " pointer\n");
501 return -EINVAL;
502 }
503 if (!tf->tf_subsys) {
504 pr_err("Unable to target struct config_subsystem"
505 " pointer\n");
506 return -EINVAL;
507 }
508 ret = target_fabric_tf_ops_check(tf);
509 if (ret < 0)
510 return ret;
511
512 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
513 ">>>>>>>>>>\n");
514 return 0;
515}
516EXPORT_SYMBOL(target_fabric_configfs_register);
517
518void target_fabric_configfs_deregister(
519 struct target_fabric_configfs *tf)
520{
521 struct configfs_subsystem *su;
522
523 if (!tf) {
524 pr_err("Unable to locate passed target_fabric_"
525 "configfs\n");
526 return;
527 }
528 su = tf->tf_subsys;
529 if (!su) {
530 pr_err("Unable to locate passed tf->tf_subsys"
531 " pointer\n");
532 return;
533 }
534 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
535 ">>>>>>>>>>>>\n");
536 mutex_lock(&g_tf_lock);
537 if (atomic_read(&tf->tf_access_cnt)) {
538 mutex_unlock(&g_tf_lock);
539 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
540 tf->tf_name);
541 BUG();
542 }
543 list_del(&tf->tf_list);
544 mutex_unlock(&g_tf_lock);
545
546 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
547 " %s\n", tf->tf_name);
548 tf->tf_module = NULL;
549 tf->tf_subsys = NULL;
550 kfree(tf);
551
552 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
553 ">>>>>\n");
554}
555EXPORT_SYMBOL(target_fabric_configfs_deregister);
556
557
558
559
560
561
562
563#define DEF_DEV_ATTRIB_SHOW(_name) \
564static ssize_t target_core_dev_show_attr_##_name( \
565 struct se_dev_attrib *da, \
566 char *page) \
567{ \
568 return snprintf(page, PAGE_SIZE, "%u\n", \
569 (u32)da->da_dev->dev_attrib._name); \
570}
571
572#define DEF_DEV_ATTRIB_STORE(_name) \
573static ssize_t target_core_dev_store_attr_##_name( \
574 struct se_dev_attrib *da, \
575 const char *page, \
576 size_t count) \
577{ \
578 unsigned long val; \
579 int ret; \
580 \
581 ret = kstrtoul(page, 0, &val); \
582 if (ret < 0) { \
583 pr_err("kstrtoul() failed with" \
584 " ret: %d\n", ret); \
585 return -EINVAL; \
586 } \
587 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
588 \
589 return (!ret) ? count : -EINVAL; \
590}
591
592#define DEF_DEV_ATTRIB(_name) \
593DEF_DEV_ATTRIB_SHOW(_name); \
594DEF_DEV_ATTRIB_STORE(_name);
595
596#define DEF_DEV_ATTRIB_RO(_name) \
597DEF_DEV_ATTRIB_SHOW(_name);
598
599CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
600#define SE_DEV_ATTR(_name, _mode) \
601static struct target_core_dev_attrib_attribute \
602 target_core_dev_attrib_##_name = \
603 __CONFIGFS_EATTR(_name, _mode, \
604 target_core_dev_show_attr_##_name, \
605 target_core_dev_store_attr_##_name);
606
607#define SE_DEV_ATTR_RO(_name); \
608static struct target_core_dev_attrib_attribute \
609 target_core_dev_attrib_##_name = \
610 __CONFIGFS_EATTR_RO(_name, \
611 target_core_dev_show_attr_##_name);
612
613DEF_DEV_ATTRIB(emulate_model_alias);
614SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
615
616DEF_DEV_ATTRIB(emulate_dpo);
617SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
618
619DEF_DEV_ATTRIB(emulate_fua_write);
620SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
621
622DEF_DEV_ATTRIB(emulate_fua_read);
623SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
624
625DEF_DEV_ATTRIB(emulate_write_cache);
626SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
627
628DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
629SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
630
631DEF_DEV_ATTRIB(emulate_tas);
632SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
633
634DEF_DEV_ATTRIB(emulate_tpu);
635SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
636
637DEF_DEV_ATTRIB(emulate_tpws);
638SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
639
640DEF_DEV_ATTRIB(emulate_caw);
641SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
642
643DEF_DEV_ATTRIB(emulate_3pc);
644SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
645
646DEF_DEV_ATTRIB(enforce_pr_isids);
647SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
648
649DEF_DEV_ATTRIB(is_nonrot);
650SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
651
652DEF_DEV_ATTRIB(emulate_rest_reord);
653SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
654
655DEF_DEV_ATTRIB_RO(hw_block_size);
656SE_DEV_ATTR_RO(hw_block_size);
657
658DEF_DEV_ATTRIB(block_size);
659SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
660
661DEF_DEV_ATTRIB_RO(hw_max_sectors);
662SE_DEV_ATTR_RO(hw_max_sectors);
663
664DEF_DEV_ATTRIB(fabric_max_sectors);
665SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
666
667DEF_DEV_ATTRIB(optimal_sectors);
668SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
669
670DEF_DEV_ATTRIB_RO(hw_queue_depth);
671SE_DEV_ATTR_RO(hw_queue_depth);
672
673DEF_DEV_ATTRIB(queue_depth);
674SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
675
676DEF_DEV_ATTRIB(max_unmap_lba_count);
677SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
678
679DEF_DEV_ATTRIB(max_unmap_block_desc_count);
680SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
681
682DEF_DEV_ATTRIB(unmap_granularity);
683SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
684
685DEF_DEV_ATTRIB(unmap_granularity_alignment);
686SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
687
688DEF_DEV_ATTRIB(max_write_same_len);
689SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
690
691CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
692
693static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
694 &target_core_dev_attrib_emulate_model_alias.attr,
695 &target_core_dev_attrib_emulate_dpo.attr,
696 &target_core_dev_attrib_emulate_fua_write.attr,
697 &target_core_dev_attrib_emulate_fua_read.attr,
698 &target_core_dev_attrib_emulate_write_cache.attr,
699 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
700 &target_core_dev_attrib_emulate_tas.attr,
701 &target_core_dev_attrib_emulate_tpu.attr,
702 &target_core_dev_attrib_emulate_tpws.attr,
703 &target_core_dev_attrib_emulate_caw.attr,
704 &target_core_dev_attrib_emulate_3pc.attr,
705 &target_core_dev_attrib_enforce_pr_isids.attr,
706 &target_core_dev_attrib_is_nonrot.attr,
707 &target_core_dev_attrib_emulate_rest_reord.attr,
708 &target_core_dev_attrib_hw_block_size.attr,
709 &target_core_dev_attrib_block_size.attr,
710 &target_core_dev_attrib_hw_max_sectors.attr,
711 &target_core_dev_attrib_fabric_max_sectors.attr,
712 &target_core_dev_attrib_optimal_sectors.attr,
713 &target_core_dev_attrib_hw_queue_depth.attr,
714 &target_core_dev_attrib_queue_depth.attr,
715 &target_core_dev_attrib_max_unmap_lba_count.attr,
716 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
717 &target_core_dev_attrib_unmap_granularity.attr,
718 &target_core_dev_attrib_unmap_granularity_alignment.attr,
719 &target_core_dev_attrib_max_write_same_len.attr,
720 NULL,
721};
722
723static struct configfs_item_operations target_core_dev_attrib_ops = {
724 .show_attribute = target_core_dev_attrib_attr_show,
725 .store_attribute = target_core_dev_attrib_attr_store,
726};
727
728static struct config_item_type target_core_dev_attrib_cit = {
729 .ct_item_ops = &target_core_dev_attrib_ops,
730 .ct_attrs = target_core_dev_attrib_attrs,
731 .ct_owner = THIS_MODULE,
732};
733
734
735
736
737
738CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
739#define SE_DEV_WWN_ATTR(_name, _mode) \
740static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
741 __CONFIGFS_EATTR(_name, _mode, \
742 target_core_dev_wwn_show_attr_##_name, \
743 target_core_dev_wwn_store_attr_##_name);
744
745#define SE_DEV_WWN_ATTR_RO(_name); \
746do { \
747 static struct target_core_dev_wwn_attribute \
748 target_core_dev_wwn_##_name = \
749 __CONFIGFS_EATTR_RO(_name, \
750 target_core_dev_wwn_show_attr_##_name); \
751} while (0);
752
753
754
755
756static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
757 struct t10_wwn *t10_wwn,
758 char *page)
759{
760 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
761 &t10_wwn->unit_serial[0]);
762}
763
764static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
765 struct t10_wwn *t10_wwn,
766 const char *page,
767 size_t count)
768{
769 struct se_device *dev = t10_wwn->t10_dev;
770 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
771
772
773
774
775
776
777
778
779
780
781
782 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
783 pr_err("Underlying SCSI device firmware provided VPD"
784 " Unit Serial, ignoring request\n");
785 return -EOPNOTSUPP;
786 }
787
788 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
789 pr_err("Emulated VPD Unit Serial exceeds"
790 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
791 return -EOVERFLOW;
792 }
793
794
795
796
797
798
799 if (dev->export_count) {
800 pr_err("Unable to set VPD Unit Serial while"
801 " active %d $FABRIC_MOD exports exist\n",
802 dev->export_count);
803 return -EINVAL;
804 }
805
806
807
808
809
810
811
812 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
813 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
814 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
815 "%s", strstrip(buf));
816 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
817
818 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
819 " %s\n", dev->t10_wwn.unit_serial);
820
821 return count;
822}
823
824SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
825
826
827
828
829static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
830 struct t10_wwn *t10_wwn,
831 char *page)
832{
833 struct t10_vpd *vpd;
834 unsigned char buf[VPD_TMP_BUF_SIZE];
835 ssize_t len = 0;
836
837 memset(buf, 0, VPD_TMP_BUF_SIZE);
838
839 spin_lock(&t10_wwn->t10_vpd_lock);
840 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
841 if (!vpd->protocol_identifier_set)
842 continue;
843
844 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
845
846 if (len + strlen(buf) >= PAGE_SIZE)
847 break;
848
849 len += sprintf(page+len, "%s", buf);
850 }
851 spin_unlock(&t10_wwn->t10_vpd_lock);
852
853 return len;
854}
855
856static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
857 struct t10_wwn *t10_wwn,
858 const char *page,
859 size_t count)
860{
861 return -ENOSYS;
862}
863
864SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
865
866
867
868
869#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
870static ssize_t target_core_dev_wwn_show_attr_##_name( \
871 struct t10_wwn *t10_wwn, \
872 char *page) \
873{ \
874 struct t10_vpd *vpd; \
875 unsigned char buf[VPD_TMP_BUF_SIZE]; \
876 ssize_t len = 0; \
877 \
878 spin_lock(&t10_wwn->t10_vpd_lock); \
879 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
880 if (vpd->association != _assoc) \
881 continue; \
882 \
883 memset(buf, 0, VPD_TMP_BUF_SIZE); \
884 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
885 if (len + strlen(buf) >= PAGE_SIZE) \
886 break; \
887 len += sprintf(page+len, "%s", buf); \
888 \
889 memset(buf, 0, VPD_TMP_BUF_SIZE); \
890 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
891 if (len + strlen(buf) >= PAGE_SIZE) \
892 break; \
893 len += sprintf(page+len, "%s", buf); \
894 \
895 memset(buf, 0, VPD_TMP_BUF_SIZE); \
896 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
897 if (len + strlen(buf) >= PAGE_SIZE) \
898 break; \
899 len += sprintf(page+len, "%s", buf); \
900 } \
901 spin_unlock(&t10_wwn->t10_vpd_lock); \
902 \
903 return len; \
904}
905
906
907
908
909DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
910
911static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
912 struct t10_wwn *t10_wwn,
913 const char *page,
914 size_t count)
915{
916 return -ENOSYS;
917}
918
919SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
920
921
922
923
924DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
925
926static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
927 struct t10_wwn *t10_wwn,
928 const char *page,
929 size_t count)
930{
931 return -ENOSYS;
932}
933
934SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
935
936
937
938
939DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
940
941static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
942 struct t10_wwn *t10_wwn,
943 const char *page,
944 size_t count)
945{
946 return -ENOSYS;
947}
948
949SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
950
951CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
952
953static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
954 &target_core_dev_wwn_vpd_unit_serial.attr,
955 &target_core_dev_wwn_vpd_protocol_identifier.attr,
956 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
957 &target_core_dev_wwn_vpd_assoc_target_port.attr,
958 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
959 NULL,
960};
961
962static struct configfs_item_operations target_core_dev_wwn_ops = {
963 .show_attribute = target_core_dev_wwn_attr_show,
964 .store_attribute = target_core_dev_wwn_attr_store,
965};
966
967static struct config_item_type target_core_dev_wwn_cit = {
968 .ct_item_ops = &target_core_dev_wwn_ops,
969 .ct_attrs = target_core_dev_wwn_attrs,
970 .ct_owner = THIS_MODULE,
971};
972
973
974
975
976
977CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
978#define SE_DEV_PR_ATTR(_name, _mode) \
979static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
980 __CONFIGFS_EATTR(_name, _mode, \
981 target_core_dev_pr_show_attr_##_name, \
982 target_core_dev_pr_store_attr_##_name);
983
984#define SE_DEV_PR_ATTR_RO(_name); \
985static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
986 __CONFIGFS_EATTR_RO(_name, \
987 target_core_dev_pr_show_attr_##_name);
988
989static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
990 char *page)
991{
992 struct se_node_acl *se_nacl;
993 struct t10_pr_registration *pr_reg;
994 char i_buf[PR_REG_ISID_ID_LEN];
995
996 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
997
998 pr_reg = dev->dev_pr_res_holder;
999 if (!pr_reg)
1000 return sprintf(page, "No SPC-3 Reservation holder\n");
1001
1002 se_nacl = pr_reg->pr_reg_nacl;
1003 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1004
1005 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1006 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1007 se_nacl->initiatorname, i_buf);
1008}
1009
1010static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1011 char *page)
1012{
1013 struct se_node_acl *se_nacl;
1014 ssize_t len;
1015
1016 se_nacl = dev->dev_reserved_node_acl;
1017 if (se_nacl) {
1018 len = sprintf(page,
1019 "SPC-2 Reservation: %s Initiator: %s\n",
1020 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1021 se_nacl->initiatorname);
1022 } else {
1023 len = sprintf(page, "No SPC-2 Reservation holder\n");
1024 }
1025 return len;
1026}
1027
1028static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1029 char *page)
1030{
1031 int ret;
1032
1033 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1034 return sprintf(page, "Passthrough\n");
1035
1036 spin_lock(&dev->dev_reservation_lock);
1037 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1038 ret = target_core_dev_pr_show_spc2_res(dev, page);
1039 else
1040 ret = target_core_dev_pr_show_spc3_res(dev, page);
1041 spin_unlock(&dev->dev_reservation_lock);
1042 return ret;
1043}
1044
1045SE_DEV_PR_ATTR_RO(res_holder);
1046
1047static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1048 struct se_device *dev, char *page)
1049{
1050 ssize_t len = 0;
1051
1052 spin_lock(&dev->dev_reservation_lock);
1053 if (!dev->dev_pr_res_holder) {
1054 len = sprintf(page, "No SPC-3 Reservation holder\n");
1055 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1056 len = sprintf(page, "SPC-3 Reservation: All Target"
1057 " Ports registration\n");
1058 } else {
1059 len = sprintf(page, "SPC-3 Reservation: Single"
1060 " Target Port registration\n");
1061 }
1062
1063 spin_unlock(&dev->dev_reservation_lock);
1064 return len;
1065}
1066
1067SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1068
1069static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1070 struct se_device *dev, char *page)
1071{
1072 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1073}
1074
1075SE_DEV_PR_ATTR_RO(res_pr_generation);
1076
1077
1078
1079
1080static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1081 struct se_device *dev, char *page)
1082{
1083 struct se_node_acl *se_nacl;
1084 struct se_lun *lun;
1085 struct se_portal_group *se_tpg;
1086 struct t10_pr_registration *pr_reg;
1087 struct target_core_fabric_ops *tfo;
1088 ssize_t len = 0;
1089
1090 spin_lock(&dev->dev_reservation_lock);
1091 pr_reg = dev->dev_pr_res_holder;
1092 if (!pr_reg) {
1093 len = sprintf(page, "No SPC-3 Reservation holder\n");
1094 goto out_unlock;
1095 }
1096
1097 se_nacl = pr_reg->pr_reg_nacl;
1098 se_tpg = se_nacl->se_tpg;
1099 lun = pr_reg->pr_reg_tg_pt_lun;
1100 tfo = se_tpg->se_tpg_tfo;
1101
1102 len += sprintf(page+len, "SPC-3 Reservation: %s"
1103 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1104 tfo->tpg_get_wwn(se_tpg));
1105 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1106 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1107 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1108 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1109 tfo->get_fabric_name(), lun->unpacked_lun);
1110
1111out_unlock:
1112 spin_unlock(&dev->dev_reservation_lock);
1113 return len;
1114}
1115
1116SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1117
1118static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1119 struct se_device *dev, char *page)
1120{
1121 struct target_core_fabric_ops *tfo;
1122 struct t10_pr_registration *pr_reg;
1123 unsigned char buf[384];
1124 char i_buf[PR_REG_ISID_ID_LEN];
1125 ssize_t len = 0;
1126 int reg_count = 0;
1127
1128 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1129
1130 spin_lock(&dev->t10_pr.registration_lock);
1131 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1132 pr_reg_list) {
1133
1134 memset(buf, 0, 384);
1135 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1136 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1137 core_pr_dump_initiator_port(pr_reg, i_buf,
1138 PR_REG_ISID_ID_LEN);
1139 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1140 tfo->get_fabric_name(),
1141 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1142 pr_reg->pr_res_generation);
1143
1144 if (len + strlen(buf) >= PAGE_SIZE)
1145 break;
1146
1147 len += sprintf(page+len, "%s", buf);
1148 reg_count++;
1149 }
1150 spin_unlock(&dev->t10_pr.registration_lock);
1151
1152 if (!reg_count)
1153 len += sprintf(page+len, "None\n");
1154
1155 return len;
1156}
1157
1158SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1159
1160static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1161 struct se_device *dev, char *page)
1162{
1163 struct t10_pr_registration *pr_reg;
1164 ssize_t len = 0;
1165
1166 spin_lock(&dev->dev_reservation_lock);
1167 pr_reg = dev->dev_pr_res_holder;
1168 if (pr_reg) {
1169 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1170 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1171 } else {
1172 len = sprintf(page, "No SPC-3 Reservation holder\n");
1173 }
1174
1175 spin_unlock(&dev->dev_reservation_lock);
1176 return len;
1177}
1178
1179SE_DEV_PR_ATTR_RO(res_pr_type);
1180
1181static ssize_t target_core_dev_pr_show_attr_res_type(
1182 struct se_device *dev, char *page)
1183{
1184 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1185 return sprintf(page, "SPC_PASSTHROUGH\n");
1186 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1187 return sprintf(page, "SPC2_RESERVATIONS\n");
1188 else
1189 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1190}
1191
1192SE_DEV_PR_ATTR_RO(res_type);
1193
1194static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1195 struct se_device *dev, char *page)
1196{
1197 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1198 return 0;
1199
1200 return sprintf(page, "APTPL Bit Status: %s\n",
1201 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1202}
1203
1204SE_DEV_PR_ATTR_RO(res_aptpl_active);
1205
1206
1207
1208
1209static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1210 struct se_device *dev, char *page)
1211{
1212 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1213 return 0;
1214
1215 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1216}
1217
1218enum {
1219 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1220 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1221 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1222 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1223};
1224
1225static match_table_t tokens = {
1226 {Opt_initiator_fabric, "initiator_fabric=%s"},
1227 {Opt_initiator_node, "initiator_node=%s"},
1228 {Opt_initiator_sid, "initiator_sid=%s"},
1229 {Opt_sa_res_key, "sa_res_key=%s"},
1230 {Opt_res_holder, "res_holder=%d"},
1231 {Opt_res_type, "res_type=%d"},
1232 {Opt_res_scope, "res_scope=%d"},
1233 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1234 {Opt_mapped_lun, "mapped_lun=%d"},
1235 {Opt_target_fabric, "target_fabric=%s"},
1236 {Opt_target_node, "target_node=%s"},
1237 {Opt_tpgt, "tpgt=%d"},
1238 {Opt_port_rtpi, "port_rtpi=%d"},
1239 {Opt_target_lun, "target_lun=%d"},
1240 {Opt_err, NULL}
1241};
1242
1243static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1244 struct se_device *dev,
1245 const char *page,
1246 size_t count)
1247{
1248 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1249 unsigned char *t_fabric = NULL, *t_port = NULL;
1250 char *orig, *ptr, *arg_p, *opts;
1251 substring_t args[MAX_OPT_ARGS];
1252 unsigned long long tmp_ll;
1253 u64 sa_res_key = 0;
1254 u32 mapped_lun = 0, target_lun = 0;
1255 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1256 u16 port_rpti = 0, tpgt = 0;
1257 u8 type = 0, scope;
1258
1259 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1260 return 0;
1261 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1262 return 0;
1263
1264 if (dev->export_count) {
1265 pr_debug("Unable to process APTPL metadata while"
1266 " active fabric exports exist\n");
1267 return -EINVAL;
1268 }
1269
1270 opts = kstrdup(page, GFP_KERNEL);
1271 if (!opts)
1272 return -ENOMEM;
1273
1274 orig = opts;
1275 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1276 if (!*ptr)
1277 continue;
1278
1279 token = match_token(ptr, tokens, args);
1280 switch (token) {
1281 case Opt_initiator_fabric:
1282 i_fabric = match_strdup(&args[0]);
1283 if (!i_fabric) {
1284 ret = -ENOMEM;
1285 goto out;
1286 }
1287 break;
1288 case Opt_initiator_node:
1289 i_port = match_strdup(&args[0]);
1290 if (!i_port) {
1291 ret = -ENOMEM;
1292 goto out;
1293 }
1294 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1295 pr_err("APTPL metadata initiator_node="
1296 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1297 PR_APTPL_MAX_IPORT_LEN);
1298 ret = -EINVAL;
1299 break;
1300 }
1301 break;
1302 case Opt_initiator_sid:
1303 isid = match_strdup(&args[0]);
1304 if (!isid) {
1305 ret = -ENOMEM;
1306 goto out;
1307 }
1308 if (strlen(isid) >= PR_REG_ISID_LEN) {
1309 pr_err("APTPL metadata initiator_isid"
1310 "= exceeds PR_REG_ISID_LEN: %d\n",
1311 PR_REG_ISID_LEN);
1312 ret = -EINVAL;
1313 break;
1314 }
1315 break;
1316 case Opt_sa_res_key:
1317 arg_p = match_strdup(&args[0]);
1318 if (!arg_p) {
1319 ret = -ENOMEM;
1320 goto out;
1321 }
1322 ret = kstrtoull(arg_p, 0, &tmp_ll);
1323 if (ret < 0) {
1324 pr_err("kstrtoull() failed for"
1325 " sa_res_key=\n");
1326 goto out;
1327 }
1328 sa_res_key = (u64)tmp_ll;
1329 break;
1330
1331
1332
1333 case Opt_res_holder:
1334 match_int(args, &arg);
1335 res_holder = arg;
1336 break;
1337 case Opt_res_type:
1338 match_int(args, &arg);
1339 type = (u8)arg;
1340 break;
1341 case Opt_res_scope:
1342 match_int(args, &arg);
1343 scope = (u8)arg;
1344 break;
1345 case Opt_res_all_tg_pt:
1346 match_int(args, &arg);
1347 all_tg_pt = (int)arg;
1348 break;
1349 case Opt_mapped_lun:
1350 match_int(args, &arg);
1351 mapped_lun = (u32)arg;
1352 break;
1353
1354
1355
1356 case Opt_target_fabric:
1357 t_fabric = match_strdup(&args[0]);
1358 if (!t_fabric) {
1359 ret = -ENOMEM;
1360 goto out;
1361 }
1362 break;
1363 case Opt_target_node:
1364 t_port = match_strdup(&args[0]);
1365 if (!t_port) {
1366 ret = -ENOMEM;
1367 goto out;
1368 }
1369 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1370 pr_err("APTPL metadata target_node="
1371 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1372 PR_APTPL_MAX_TPORT_LEN);
1373 ret = -EINVAL;
1374 break;
1375 }
1376 break;
1377 case Opt_tpgt:
1378 match_int(args, &arg);
1379 tpgt = (u16)arg;
1380 break;
1381 case Opt_port_rtpi:
1382 match_int(args, &arg);
1383 port_rpti = (u16)arg;
1384 break;
1385 case Opt_target_lun:
1386 match_int(args, &arg);
1387 target_lun = (u32)arg;
1388 break;
1389 default:
1390 break;
1391 }
1392 }
1393
1394 if (!i_port || !t_port || !sa_res_key) {
1395 pr_err("Illegal parameters for APTPL registration\n");
1396 ret = -EINVAL;
1397 goto out;
1398 }
1399
1400 if (res_holder && !(type)) {
1401 pr_err("Illegal PR type: 0x%02x for reservation"
1402 " holder\n", type);
1403 ret = -EINVAL;
1404 goto out;
1405 }
1406
1407 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1408 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1409 res_holder, all_tg_pt, type);
1410out:
1411 kfree(i_fabric);
1412 kfree(i_port);
1413 kfree(isid);
1414 kfree(t_fabric);
1415 kfree(t_port);
1416 kfree(orig);
1417 return (ret == 0) ? count : ret;
1418}
1419
1420SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1421
1422CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1423
1424static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1425 &target_core_dev_pr_res_holder.attr,
1426 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1427 &target_core_dev_pr_res_pr_generation.attr,
1428 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1429 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1430 &target_core_dev_pr_res_pr_type.attr,
1431 &target_core_dev_pr_res_type.attr,
1432 &target_core_dev_pr_res_aptpl_active.attr,
1433 &target_core_dev_pr_res_aptpl_metadata.attr,
1434 NULL,
1435};
1436
1437static struct configfs_item_operations target_core_dev_pr_ops = {
1438 .show_attribute = target_core_dev_pr_attr_show,
1439 .store_attribute = target_core_dev_pr_attr_store,
1440};
1441
1442static struct config_item_type target_core_dev_pr_cit = {
1443 .ct_item_ops = &target_core_dev_pr_ops,
1444 .ct_attrs = target_core_dev_pr_attrs,
1445 .ct_owner = THIS_MODULE,
1446};
1447
1448
1449
1450
1451
1452static ssize_t target_core_show_dev_info(void *p, char *page)
1453{
1454 struct se_device *dev = p;
1455 struct se_subsystem_api *t = dev->transport;
1456 int bl = 0;
1457 ssize_t read_bytes = 0;
1458
1459 transport_dump_dev_state(dev, page, &bl);
1460 read_bytes += bl;
1461 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1462 return read_bytes;
1463}
1464
1465static struct target_core_configfs_attribute target_core_attr_dev_info = {
1466 .attr = { .ca_owner = THIS_MODULE,
1467 .ca_name = "info",
1468 .ca_mode = S_IRUGO },
1469 .show = target_core_show_dev_info,
1470 .store = NULL,
1471};
1472
1473static ssize_t target_core_store_dev_control(
1474 void *p,
1475 const char *page,
1476 size_t count)
1477{
1478 struct se_device *dev = p;
1479 struct se_subsystem_api *t = dev->transport;
1480
1481 return t->set_configfs_dev_params(dev, page, count);
1482}
1483
1484static struct target_core_configfs_attribute target_core_attr_dev_control = {
1485 .attr = { .ca_owner = THIS_MODULE,
1486 .ca_name = "control",
1487 .ca_mode = S_IWUSR },
1488 .show = NULL,
1489 .store = target_core_store_dev_control,
1490};
1491
1492static ssize_t target_core_show_dev_alias(void *p, char *page)
1493{
1494 struct se_device *dev = p;
1495
1496 if (!(dev->dev_flags & DF_USING_ALIAS))
1497 return 0;
1498
1499 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1500}
1501
1502static ssize_t target_core_store_dev_alias(
1503 void *p,
1504 const char *page,
1505 size_t count)
1506{
1507 struct se_device *dev = p;
1508 struct se_hba *hba = dev->se_hba;
1509 ssize_t read_bytes;
1510
1511 if (count > (SE_DEV_ALIAS_LEN-1)) {
1512 pr_err("alias count: %d exceeds"
1513 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1514 SE_DEV_ALIAS_LEN-1);
1515 return -EINVAL;
1516 }
1517
1518 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1519 if (!read_bytes)
1520 return -EINVAL;
1521 if (dev->dev_alias[read_bytes - 1] == '\n')
1522 dev->dev_alias[read_bytes - 1] = '\0';
1523
1524 dev->dev_flags |= DF_USING_ALIAS;
1525
1526 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1527 config_item_name(&hba->hba_group.cg_item),
1528 config_item_name(&dev->dev_group.cg_item),
1529 dev->dev_alias);
1530
1531 return read_bytes;
1532}
1533
1534static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1535 .attr = { .ca_owner = THIS_MODULE,
1536 .ca_name = "alias",
1537 .ca_mode = S_IRUGO | S_IWUSR },
1538 .show = target_core_show_dev_alias,
1539 .store = target_core_store_dev_alias,
1540};
1541
1542static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1543{
1544 struct se_device *dev = p;
1545
1546 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1547 return 0;
1548
1549 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1550}
1551
1552static ssize_t target_core_store_dev_udev_path(
1553 void *p,
1554 const char *page,
1555 size_t count)
1556{
1557 struct se_device *dev = p;
1558 struct se_hba *hba = dev->se_hba;
1559 ssize_t read_bytes;
1560
1561 if (count > (SE_UDEV_PATH_LEN-1)) {
1562 pr_err("udev_path count: %d exceeds"
1563 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1564 SE_UDEV_PATH_LEN-1);
1565 return -EINVAL;
1566 }
1567
1568 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1569 "%s", page);
1570 if (!read_bytes)
1571 return -EINVAL;
1572 if (dev->udev_path[read_bytes - 1] == '\n')
1573 dev->udev_path[read_bytes - 1] = '\0';
1574
1575 dev->dev_flags |= DF_USING_UDEV_PATH;
1576
1577 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1578 config_item_name(&hba->hba_group.cg_item),
1579 config_item_name(&dev->dev_group.cg_item),
1580 dev->udev_path);
1581
1582 return read_bytes;
1583}
1584
1585static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1586 .attr = { .ca_owner = THIS_MODULE,
1587 .ca_name = "udev_path",
1588 .ca_mode = S_IRUGO | S_IWUSR },
1589 .show = target_core_show_dev_udev_path,
1590 .store = target_core_store_dev_udev_path,
1591};
1592
1593static ssize_t target_core_show_dev_enable(void *p, char *page)
1594{
1595 struct se_device *dev = p;
1596
1597 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1598}
1599
1600static ssize_t target_core_store_dev_enable(
1601 void *p,
1602 const char *page,
1603 size_t count)
1604{
1605 struct se_device *dev = p;
1606 char *ptr;
1607 int ret;
1608
1609 ptr = strstr(page, "1");
1610 if (!ptr) {
1611 pr_err("For dev_enable ops, only valid value"
1612 " is \"1\"\n");
1613 return -EINVAL;
1614 }
1615
1616 ret = target_configure_device(dev);
1617 if (ret)
1618 return ret;
1619 return count;
1620}
1621
1622static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1623 .attr = { .ca_owner = THIS_MODULE,
1624 .ca_name = "enable",
1625 .ca_mode = S_IRUGO | S_IWUSR },
1626 .show = target_core_show_dev_enable,
1627 .store = target_core_store_dev_enable,
1628};
1629
1630static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1631{
1632 struct se_device *dev = p;
1633 struct config_item *lu_ci;
1634 struct t10_alua_lu_gp *lu_gp;
1635 struct t10_alua_lu_gp_member *lu_gp_mem;
1636 ssize_t len = 0;
1637
1638 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1639 if (!lu_gp_mem)
1640 return 0;
1641
1642 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1643 lu_gp = lu_gp_mem->lu_gp;
1644 if (lu_gp) {
1645 lu_ci = &lu_gp->lu_gp_group.cg_item;
1646 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1647 config_item_name(lu_ci), lu_gp->lu_gp_id);
1648 }
1649 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1650
1651 return len;
1652}
1653
1654static ssize_t target_core_store_alua_lu_gp(
1655 void *p,
1656 const char *page,
1657 size_t count)
1658{
1659 struct se_device *dev = p;
1660 struct se_hba *hba = dev->se_hba;
1661 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1662 struct t10_alua_lu_gp_member *lu_gp_mem;
1663 unsigned char buf[LU_GROUP_NAME_BUF];
1664 int move = 0;
1665
1666 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1667 if (!lu_gp_mem)
1668 return 0;
1669
1670 if (count > LU_GROUP_NAME_BUF) {
1671 pr_err("ALUA LU Group Alias too large!\n");
1672 return -EINVAL;
1673 }
1674 memset(buf, 0, LU_GROUP_NAME_BUF);
1675 memcpy(buf, page, count);
1676
1677
1678
1679
1680 if (strcmp(strstrip(buf), "NULL")) {
1681
1682
1683
1684
1685
1686 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1687 if (!lu_gp_new)
1688 return -ENODEV;
1689 }
1690
1691 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1692 lu_gp = lu_gp_mem->lu_gp;
1693 if (lu_gp) {
1694
1695
1696
1697
1698 if (!lu_gp_new) {
1699 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1700 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1701 " %hu\n",
1702 config_item_name(&hba->hba_group.cg_item),
1703 config_item_name(&dev->dev_group.cg_item),
1704 config_item_name(&lu_gp->lu_gp_group.cg_item),
1705 lu_gp->lu_gp_id);
1706
1707 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1708 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1709
1710 return count;
1711 }
1712
1713
1714
1715 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1716 move = 1;
1717 }
1718
1719
1720
1721 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1722 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1723
1724 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1725 " core/alua/lu_gps/%s, ID: %hu\n",
1726 (move) ? "Moving" : "Adding",
1727 config_item_name(&hba->hba_group.cg_item),
1728 config_item_name(&dev->dev_group.cg_item),
1729 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1730 lu_gp_new->lu_gp_id);
1731
1732 core_alua_put_lu_gp_from_name(lu_gp_new);
1733 return count;
1734}
1735
1736static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1737 .attr = { .ca_owner = THIS_MODULE,
1738 .ca_name = "alua_lu_gp",
1739 .ca_mode = S_IRUGO | S_IWUSR },
1740 .show = target_core_show_alua_lu_gp,
1741 .store = target_core_store_alua_lu_gp,
1742};
1743
1744static struct configfs_attribute *lio_core_dev_attrs[] = {
1745 &target_core_attr_dev_info.attr,
1746 &target_core_attr_dev_control.attr,
1747 &target_core_attr_dev_alias.attr,
1748 &target_core_attr_dev_udev_path.attr,
1749 &target_core_attr_dev_enable.attr,
1750 &target_core_attr_dev_alua_lu_gp.attr,
1751 NULL,
1752};
1753
1754static void target_core_dev_release(struct config_item *item)
1755{
1756 struct config_group *dev_cg = to_config_group(item);
1757 struct se_device *dev =
1758 container_of(dev_cg, struct se_device, dev_group);
1759
1760 kfree(dev_cg->default_groups);
1761 target_free_device(dev);
1762}
1763
1764static ssize_t target_core_dev_show(struct config_item *item,
1765 struct configfs_attribute *attr,
1766 char *page)
1767{
1768 struct config_group *dev_cg = to_config_group(item);
1769 struct se_device *dev =
1770 container_of(dev_cg, struct se_device, dev_group);
1771 struct target_core_configfs_attribute *tc_attr = container_of(
1772 attr, struct target_core_configfs_attribute, attr);
1773
1774 if (!tc_attr->show)
1775 return -EINVAL;
1776
1777 return tc_attr->show(dev, page);
1778}
1779
1780static ssize_t target_core_dev_store(struct config_item *item,
1781 struct configfs_attribute *attr,
1782 const char *page, size_t count)
1783{
1784 struct config_group *dev_cg = to_config_group(item);
1785 struct se_device *dev =
1786 container_of(dev_cg, struct se_device, dev_group);
1787 struct target_core_configfs_attribute *tc_attr = container_of(
1788 attr, struct target_core_configfs_attribute, attr);
1789
1790 if (!tc_attr->store)
1791 return -EINVAL;
1792
1793 return tc_attr->store(dev, page, count);
1794}
1795
1796static struct configfs_item_operations target_core_dev_item_ops = {
1797 .release = target_core_dev_release,
1798 .show_attribute = target_core_dev_show,
1799 .store_attribute = target_core_dev_store,
1800};
1801
1802static struct config_item_type target_core_dev_cit = {
1803 .ct_item_ops = &target_core_dev_item_ops,
1804 .ct_attrs = lio_core_dev_attrs,
1805 .ct_owner = THIS_MODULE,
1806};
1807
1808
1809
1810
1811
1812CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
1813#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
1814static struct target_core_alua_lu_gp_attribute \
1815 target_core_alua_lu_gp_##_name = \
1816 __CONFIGFS_EATTR(_name, _mode, \
1817 target_core_alua_lu_gp_show_attr_##_name, \
1818 target_core_alua_lu_gp_store_attr_##_name);
1819
1820#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
1821static struct target_core_alua_lu_gp_attribute \
1822 target_core_alua_lu_gp_##_name = \
1823 __CONFIGFS_EATTR_RO(_name, \
1824 target_core_alua_lu_gp_show_attr_##_name);
1825
1826
1827
1828
1829static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
1830 struct t10_alua_lu_gp *lu_gp,
1831 char *page)
1832{
1833 if (!lu_gp->lu_gp_valid_id)
1834 return 0;
1835
1836 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
1837}
1838
1839static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
1840 struct t10_alua_lu_gp *lu_gp,
1841 const char *page,
1842 size_t count)
1843{
1844 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
1845 unsigned long lu_gp_id;
1846 int ret;
1847
1848 ret = kstrtoul(page, 0, &lu_gp_id);
1849 if (ret < 0) {
1850 pr_err("kstrtoul() returned %d for"
1851 " lu_gp_id\n", ret);
1852 return ret;
1853 }
1854 if (lu_gp_id > 0x0000ffff) {
1855 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
1856 " 0x0000ffff\n", lu_gp_id);
1857 return -EINVAL;
1858 }
1859
1860 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
1861 if (ret < 0)
1862 return -EINVAL;
1863
1864 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
1865 " Group: core/alua/lu_gps/%s to ID: %hu\n",
1866 config_item_name(&alua_lu_gp_cg->cg_item),
1867 lu_gp->lu_gp_id);
1868
1869 return count;
1870}
1871
1872SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
1873
1874
1875
1876
1877static ssize_t target_core_alua_lu_gp_show_attr_members(
1878 struct t10_alua_lu_gp *lu_gp,
1879 char *page)
1880{
1881 struct se_device *dev;
1882 struct se_hba *hba;
1883 struct t10_alua_lu_gp_member *lu_gp_mem;
1884 ssize_t len = 0, cur_len;
1885 unsigned char buf[LU_GROUP_NAME_BUF];
1886
1887 memset(buf, 0, LU_GROUP_NAME_BUF);
1888
1889 spin_lock(&lu_gp->lu_gp_lock);
1890 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
1891 dev = lu_gp_mem->lu_gp_mem_dev;
1892 hba = dev->se_hba;
1893
1894 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
1895 config_item_name(&hba->hba_group.cg_item),
1896 config_item_name(&dev->dev_group.cg_item));
1897 cur_len++;
1898
1899 if ((cur_len + len) > PAGE_SIZE) {
1900 pr_warn("Ran out of lu_gp_show_attr"
1901 "_members buffer\n");
1902 break;
1903 }
1904 memcpy(page+len, buf, cur_len);
1905 len += cur_len;
1906 }
1907 spin_unlock(&lu_gp->lu_gp_lock);
1908
1909 return len;
1910}
1911
1912SE_DEV_ALUA_LU_ATTR_RO(members);
1913
1914CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
1915
1916static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
1917 &target_core_alua_lu_gp_lu_gp_id.attr,
1918 &target_core_alua_lu_gp_members.attr,
1919 NULL,
1920};
1921
1922static void target_core_alua_lu_gp_release(struct config_item *item)
1923{
1924 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1925 struct t10_alua_lu_gp, lu_gp_group);
1926
1927 core_alua_free_lu_gp(lu_gp);
1928}
1929
1930static struct configfs_item_operations target_core_alua_lu_gp_ops = {
1931 .release = target_core_alua_lu_gp_release,
1932 .show_attribute = target_core_alua_lu_gp_attr_show,
1933 .store_attribute = target_core_alua_lu_gp_attr_store,
1934};
1935
1936static struct config_item_type target_core_alua_lu_gp_cit = {
1937 .ct_item_ops = &target_core_alua_lu_gp_ops,
1938 .ct_attrs = target_core_alua_lu_gp_attrs,
1939 .ct_owner = THIS_MODULE,
1940};
1941
1942
1943
1944
1945
1946static struct config_group *target_core_alua_create_lu_gp(
1947 struct config_group *group,
1948 const char *name)
1949{
1950 struct t10_alua_lu_gp *lu_gp;
1951 struct config_group *alua_lu_gp_cg = NULL;
1952 struct config_item *alua_lu_gp_ci = NULL;
1953
1954 lu_gp = core_alua_allocate_lu_gp(name, 0);
1955 if (IS_ERR(lu_gp))
1956 return NULL;
1957
1958 alua_lu_gp_cg = &lu_gp->lu_gp_group;
1959 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
1960
1961 config_group_init_type_name(alua_lu_gp_cg, name,
1962 &target_core_alua_lu_gp_cit);
1963
1964 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
1965 " Group: core/alua/lu_gps/%s\n",
1966 config_item_name(alua_lu_gp_ci));
1967
1968 return alua_lu_gp_cg;
1969
1970}
1971
1972static void target_core_alua_drop_lu_gp(
1973 struct config_group *group,
1974 struct config_item *item)
1975{
1976 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
1977 struct t10_alua_lu_gp, lu_gp_group);
1978
1979 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
1980 " Group: core/alua/lu_gps/%s, ID: %hu\n",
1981 config_item_name(item), lu_gp->lu_gp_id);
1982
1983
1984
1985
1986 config_item_put(item);
1987}
1988
1989static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
1990 .make_group = &target_core_alua_create_lu_gp,
1991 .drop_item = &target_core_alua_drop_lu_gp,
1992};
1993
1994static struct config_item_type target_core_alua_lu_gps_cit = {
1995 .ct_item_ops = NULL,
1996 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
1997 .ct_owner = THIS_MODULE,
1998};
1999
2000
2001
2002
2003
2004CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2005#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2006static struct target_core_alua_tg_pt_gp_attribute \
2007 target_core_alua_tg_pt_gp_##_name = \
2008 __CONFIGFS_EATTR(_name, _mode, \
2009 target_core_alua_tg_pt_gp_show_attr_##_name, \
2010 target_core_alua_tg_pt_gp_store_attr_##_name);
2011
2012#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2013static struct target_core_alua_tg_pt_gp_attribute \
2014 target_core_alua_tg_pt_gp_##_name = \
2015 __CONFIGFS_EATTR_RO(_name, \
2016 target_core_alua_tg_pt_gp_show_attr_##_name);
2017
2018
2019
2020
2021static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2022 struct t10_alua_tg_pt_gp *tg_pt_gp,
2023 char *page)
2024{
2025 return sprintf(page, "%d\n",
2026 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2027}
2028
2029static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2030 struct t10_alua_tg_pt_gp *tg_pt_gp,
2031 const char *page,
2032 size_t count)
2033{
2034 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2035 unsigned long tmp;
2036 int new_state, ret;
2037
2038 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2039 pr_err("Unable to do implict ALUA on non valid"
2040 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2041 return -EINVAL;
2042 }
2043
2044 ret = kstrtoul(page, 0, &tmp);
2045 if (ret < 0) {
2046 pr_err("Unable to extract new ALUA access state from"
2047 " %s\n", page);
2048 return ret;
2049 }
2050 new_state = (int)tmp;
2051
2052 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2053 pr_err("Unable to process implict configfs ALUA"
2054 " transition while TPGS_IMPLICT_ALUA is disabled\n");
2055 return -EINVAL;
2056 }
2057
2058 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2059 NULL, NULL, new_state, 0);
2060 return (!ret) ? count : -EINVAL;
2061}
2062
2063SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2064
2065
2066
2067
2068static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2069 struct t10_alua_tg_pt_gp *tg_pt_gp,
2070 char *page)
2071{
2072 return sprintf(page, "%s\n",
2073 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2074}
2075
2076static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2077 struct t10_alua_tg_pt_gp *tg_pt_gp,
2078 const char *page,
2079 size_t count)
2080{
2081 unsigned long tmp;
2082 int new_status, ret;
2083
2084 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2085 pr_err("Unable to do set ALUA access status on non"
2086 " valid tg_pt_gp ID: %hu\n",
2087 tg_pt_gp->tg_pt_gp_valid_id);
2088 return -EINVAL;
2089 }
2090
2091 ret = kstrtoul(page, 0, &tmp);
2092 if (ret < 0) {
2093 pr_err("Unable to extract new ALUA access status"
2094 " from %s\n", page);
2095 return ret;
2096 }
2097 new_status = (int)tmp;
2098
2099 if ((new_status != ALUA_STATUS_NONE) &&
2100 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2101 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2102 pr_err("Illegal ALUA access status: 0x%02x\n",
2103 new_status);
2104 return -EINVAL;
2105 }
2106
2107 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2108 return count;
2109}
2110
2111SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2112
2113
2114
2115
2116static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2117 struct t10_alua_tg_pt_gp *tg_pt_gp,
2118 char *page)
2119{
2120 return core_alua_show_access_type(tg_pt_gp, page);
2121}
2122
2123static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2124 struct t10_alua_tg_pt_gp *tg_pt_gp,
2125 const char *page,
2126 size_t count)
2127{
2128 return core_alua_store_access_type(tg_pt_gp, page, count);
2129}
2130
2131SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2132
2133
2134
2135
2136static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2137 struct t10_alua_tg_pt_gp *tg_pt_gp,
2138 char *page)
2139{
2140 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2141}
2142
2143static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2144 struct t10_alua_tg_pt_gp *tg_pt_gp,
2145 const char *page,
2146 size_t count)
2147{
2148 unsigned long tmp;
2149 int ret;
2150
2151 ret = kstrtoul(page, 0, &tmp);
2152 if (ret < 0) {
2153 pr_err("Unable to extract alua_write_metadata\n");
2154 return ret;
2155 }
2156
2157 if ((tmp != 0) && (tmp != 1)) {
2158 pr_err("Illegal value for alua_write_metadata:"
2159 " %lu\n", tmp);
2160 return -EINVAL;
2161 }
2162 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2163
2164 return count;
2165}
2166
2167SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2168
2169
2170
2171
2172
2173
2174static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2175 struct t10_alua_tg_pt_gp *tg_pt_gp,
2176 char *page)
2177{
2178 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2179
2180}
2181
2182static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2183 struct t10_alua_tg_pt_gp *tg_pt_gp,
2184 const char *page,
2185 size_t count)
2186{
2187 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2188}
2189
2190SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2191
2192
2193
2194
2195static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2196 struct t10_alua_tg_pt_gp *tg_pt_gp,
2197 char *page)
2198{
2199 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2200}
2201
2202static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2203 struct t10_alua_tg_pt_gp *tg_pt_gp,
2204 const char *page,
2205 size_t count)
2206{
2207 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2208}
2209
2210SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2211
2212
2213
2214
2215static ssize_t target_core_alua_tg_pt_gp_show_attr_implict_trans_secs(
2216 struct t10_alua_tg_pt_gp *tg_pt_gp,
2217 char *page)
2218{
2219 return core_alua_show_implict_trans_secs(tg_pt_gp, page);
2220}
2221
2222static ssize_t target_core_alua_tg_pt_gp_store_attr_implict_trans_secs(
2223 struct t10_alua_tg_pt_gp *tg_pt_gp,
2224 const char *page,
2225 size_t count)
2226{
2227 return core_alua_store_implict_trans_secs(tg_pt_gp, page, count);
2228}
2229
2230SE_DEV_ALUA_TG_PT_ATTR(implict_trans_secs, S_IRUGO | S_IWUSR);
2231
2232
2233
2234
2235
2236static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2237 struct t10_alua_tg_pt_gp *tg_pt_gp,
2238 char *page)
2239{
2240 return core_alua_show_preferred_bit(tg_pt_gp, page);
2241}
2242
2243static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2244 struct t10_alua_tg_pt_gp *tg_pt_gp,
2245 const char *page,
2246 size_t count)
2247{
2248 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2249}
2250
2251SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2252
2253
2254
2255
2256static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2257 struct t10_alua_tg_pt_gp *tg_pt_gp,
2258 char *page)
2259{
2260 if (!tg_pt_gp->tg_pt_gp_valid_id)
2261 return 0;
2262
2263 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2264}
2265
2266static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2267 struct t10_alua_tg_pt_gp *tg_pt_gp,
2268 const char *page,
2269 size_t count)
2270{
2271 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2272 unsigned long tg_pt_gp_id;
2273 int ret;
2274
2275 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2276 if (ret < 0) {
2277 pr_err("kstrtoul() returned %d for"
2278 " tg_pt_gp_id\n", ret);
2279 return ret;
2280 }
2281 if (tg_pt_gp_id > 0x0000ffff) {
2282 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2283 " 0x0000ffff\n", tg_pt_gp_id);
2284 return -EINVAL;
2285 }
2286
2287 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2288 if (ret < 0)
2289 return -EINVAL;
2290
2291 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2292 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2293 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2294 tg_pt_gp->tg_pt_gp_id);
2295
2296 return count;
2297}
2298
2299SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2300
2301
2302
2303
2304static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2305 struct t10_alua_tg_pt_gp *tg_pt_gp,
2306 char *page)
2307{
2308 struct se_port *port;
2309 struct se_portal_group *tpg;
2310 struct se_lun *lun;
2311 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2312 ssize_t len = 0, cur_len;
2313 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2314
2315 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2316
2317 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2318 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2319 tg_pt_gp_mem_list) {
2320 port = tg_pt_gp_mem->tg_pt;
2321 tpg = port->sep_tpg;
2322 lun = port->sep_lun;
2323
2324 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2325 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2326 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2327 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2328 config_item_name(&lun->lun_group.cg_item));
2329 cur_len++;
2330
2331 if ((cur_len + len) > PAGE_SIZE) {
2332 pr_warn("Ran out of lu_gp_show_attr"
2333 "_members buffer\n");
2334 break;
2335 }
2336 memcpy(page+len, buf, cur_len);
2337 len += cur_len;
2338 }
2339 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2340
2341 return len;
2342}
2343
2344SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2345
2346CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2347 tg_pt_gp_group);
2348
2349static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2350 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2351 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2352 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2353 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2354 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2355 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2356 &target_core_alua_tg_pt_gp_implict_trans_secs.attr,
2357 &target_core_alua_tg_pt_gp_preferred.attr,
2358 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2359 &target_core_alua_tg_pt_gp_members.attr,
2360 NULL,
2361};
2362
2363static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2364{
2365 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2366 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2367
2368 core_alua_free_tg_pt_gp(tg_pt_gp);
2369}
2370
2371static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2372 .release = target_core_alua_tg_pt_gp_release,
2373 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2374 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2375};
2376
2377static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2378 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2379 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2380 .ct_owner = THIS_MODULE,
2381};
2382
2383
2384
2385
2386
2387static struct config_group *target_core_alua_create_tg_pt_gp(
2388 struct config_group *group,
2389 const char *name)
2390{
2391 struct t10_alua *alua = container_of(group, struct t10_alua,
2392 alua_tg_pt_gps_group);
2393 struct t10_alua_tg_pt_gp *tg_pt_gp;
2394 struct config_group *alua_tg_pt_gp_cg = NULL;
2395 struct config_item *alua_tg_pt_gp_ci = NULL;
2396
2397 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2398 if (!tg_pt_gp)
2399 return NULL;
2400
2401 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2402 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2403
2404 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2405 &target_core_alua_tg_pt_gp_cit);
2406
2407 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2408 " Group: alua/tg_pt_gps/%s\n",
2409 config_item_name(alua_tg_pt_gp_ci));
2410
2411 return alua_tg_pt_gp_cg;
2412}
2413
2414static void target_core_alua_drop_tg_pt_gp(
2415 struct config_group *group,
2416 struct config_item *item)
2417{
2418 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2419 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2420
2421 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2422 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2423 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2424
2425
2426
2427
2428 config_item_put(item);
2429}
2430
2431static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2432 .make_group = &target_core_alua_create_tg_pt_gp,
2433 .drop_item = &target_core_alua_drop_tg_pt_gp,
2434};
2435
2436static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2437 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2438 .ct_owner = THIS_MODULE,
2439};
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451static struct config_item_type target_core_alua_cit = {
2452 .ct_item_ops = NULL,
2453 .ct_attrs = NULL,
2454 .ct_owner = THIS_MODULE,
2455};
2456
2457
2458
2459
2460
2461static struct config_group *target_core_stat_mkdir(
2462 struct config_group *group,
2463 const char *name)
2464{
2465 return ERR_PTR(-ENOSYS);
2466}
2467
2468static void target_core_stat_rmdir(
2469 struct config_group *group,
2470 struct config_item *item)
2471{
2472 return;
2473}
2474
2475static struct configfs_group_operations target_core_stat_group_ops = {
2476 .make_group = &target_core_stat_mkdir,
2477 .drop_item = &target_core_stat_rmdir,
2478};
2479
2480static struct config_item_type target_core_stat_cit = {
2481 .ct_group_ops = &target_core_stat_group_ops,
2482 .ct_owner = THIS_MODULE,
2483};
2484
2485
2486
2487
2488
2489static struct config_group *target_core_make_subdev(
2490 struct config_group *group,
2491 const char *name)
2492{
2493 struct t10_alua_tg_pt_gp *tg_pt_gp;
2494 struct se_subsystem_api *t;
2495 struct config_item *hba_ci = &group->cg_item;
2496 struct se_hba *hba = item_to_hba(hba_ci);
2497 struct se_device *dev;
2498 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2499 struct config_group *dev_stat_grp = NULL;
2500 int errno = -ENOMEM, ret;
2501
2502 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2503 if (ret)
2504 return ERR_PTR(ret);
2505
2506
2507
2508 t = hba->transport;
2509
2510 dev = target_alloc_device(hba, name);
2511 if (!dev)
2512 goto out_unlock;
2513
2514 dev_cg = &dev->dev_group;
2515
2516 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2517 GFP_KERNEL);
2518 if (!dev_cg->default_groups)
2519 goto out_free_device;
2520
2521 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2522 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2523 &target_core_dev_attrib_cit);
2524 config_group_init_type_name(&dev->dev_pr_group, "pr",
2525 &target_core_dev_pr_cit);
2526 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2527 &target_core_dev_wwn_cit);
2528 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2529 "alua", &target_core_alua_tg_pt_gps_cit);
2530 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2531 "statistics", &target_core_stat_cit);
2532
2533 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2534 dev_cg->default_groups[1] = &dev->dev_pr_group;
2535 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2536 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2537 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2538 dev_cg->default_groups[5] = NULL;
2539
2540
2541
2542 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2543 if (!tg_pt_gp)
2544 goto out_free_dev_cg_default_groups;
2545 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2546
2547 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2548 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2549 GFP_KERNEL);
2550 if (!tg_pt_gp_cg->default_groups) {
2551 pr_err("Unable to allocate tg_pt_gp_cg->"
2552 "default_groups\n");
2553 goto out_free_tg_pt_gp;
2554 }
2555
2556 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2557 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2558 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2559 tg_pt_gp_cg->default_groups[1] = NULL;
2560
2561
2562
2563 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2564 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2565 GFP_KERNEL);
2566 if (!dev_stat_grp->default_groups) {
2567 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2568 goto out_free_tg_pt_gp_cg_default_groups;
2569 }
2570 target_stat_setup_dev_default_groups(dev);
2571
2572 mutex_unlock(&hba->hba_access_mutex);
2573 return dev_cg;
2574
2575out_free_tg_pt_gp_cg_default_groups:
2576 kfree(tg_pt_gp_cg->default_groups);
2577out_free_tg_pt_gp:
2578 core_alua_free_tg_pt_gp(tg_pt_gp);
2579out_free_dev_cg_default_groups:
2580 kfree(dev_cg->default_groups);
2581out_free_device:
2582 target_free_device(dev);
2583out_unlock:
2584 mutex_unlock(&hba->hba_access_mutex);
2585 return ERR_PTR(errno);
2586}
2587
2588static void target_core_drop_subdev(
2589 struct config_group *group,
2590 struct config_item *item)
2591{
2592 struct config_group *dev_cg = to_config_group(item);
2593 struct se_device *dev =
2594 container_of(dev_cg, struct se_device, dev_group);
2595 struct se_hba *hba;
2596 struct config_item *df_item;
2597 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2598 int i;
2599
2600 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2601
2602 mutex_lock(&hba->hba_access_mutex);
2603
2604 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2605 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2606 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2607 dev_stat_grp->default_groups[i] = NULL;
2608 config_item_put(df_item);
2609 }
2610 kfree(dev_stat_grp->default_groups);
2611
2612 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2613 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2614 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2615 tg_pt_gp_cg->default_groups[i] = NULL;
2616 config_item_put(df_item);
2617 }
2618 kfree(tg_pt_gp_cg->default_groups);
2619
2620
2621
2622
2623 dev->t10_alua.default_tg_pt_gp = NULL;
2624
2625 for (i = 0; dev_cg->default_groups[i]; i++) {
2626 df_item = &dev_cg->default_groups[i]->cg_item;
2627 dev_cg->default_groups[i] = NULL;
2628 config_item_put(df_item);
2629 }
2630
2631
2632
2633 config_item_put(item);
2634 mutex_unlock(&hba->hba_access_mutex);
2635}
2636
2637static struct configfs_group_operations target_core_hba_group_ops = {
2638 .make_group = target_core_make_subdev,
2639 .drop_item = target_core_drop_subdev,
2640};
2641
2642CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2643#define SE_HBA_ATTR(_name, _mode) \
2644static struct target_core_hba_attribute \
2645 target_core_hba_##_name = \
2646 __CONFIGFS_EATTR(_name, _mode, \
2647 target_core_hba_show_attr_##_name, \
2648 target_core_hba_store_attr_##_name);
2649
2650#define SE_HBA_ATTR_RO(_name) \
2651static struct target_core_hba_attribute \
2652 target_core_hba_##_name = \
2653 __CONFIGFS_EATTR_RO(_name, \
2654 target_core_hba_show_attr_##_name);
2655
2656static ssize_t target_core_hba_show_attr_hba_info(
2657 struct se_hba *hba,
2658 char *page)
2659{
2660 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2661 hba->hba_id, hba->transport->name,
2662 TARGET_CORE_CONFIGFS_VERSION);
2663}
2664
2665SE_HBA_ATTR_RO(hba_info);
2666
2667static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2668 char *page)
2669{
2670 int hba_mode = 0;
2671
2672 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2673 hba_mode = 1;
2674
2675 return sprintf(page, "%d\n", hba_mode);
2676}
2677
2678static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2679 const char *page, size_t count)
2680{
2681 struct se_subsystem_api *transport = hba->transport;
2682 unsigned long mode_flag;
2683 int ret;
2684
2685 if (transport->pmode_enable_hba == NULL)
2686 return -EINVAL;
2687
2688 ret = kstrtoul(page, 0, &mode_flag);
2689 if (ret < 0) {
2690 pr_err("Unable to extract hba mode flag: %d\n", ret);
2691 return ret;
2692 }
2693
2694 if (hba->dev_count) {
2695 pr_err("Unable to set hba_mode with active devices\n");
2696 return -EINVAL;
2697 }
2698
2699 ret = transport->pmode_enable_hba(hba, mode_flag);
2700 if (ret < 0)
2701 return -EINVAL;
2702 if (ret > 0)
2703 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2704 else if (ret == 0)
2705 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2706
2707 return count;
2708}
2709
2710SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2711
2712CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2713
2714static void target_core_hba_release(struct config_item *item)
2715{
2716 struct se_hba *hba = container_of(to_config_group(item),
2717 struct se_hba, hba_group);
2718 core_delete_hba(hba);
2719}
2720
2721static struct configfs_attribute *target_core_hba_attrs[] = {
2722 &target_core_hba_hba_info.attr,
2723 &target_core_hba_hba_mode.attr,
2724 NULL,
2725};
2726
2727static struct configfs_item_operations target_core_hba_item_ops = {
2728 .release = target_core_hba_release,
2729 .show_attribute = target_core_hba_attr_show,
2730 .store_attribute = target_core_hba_attr_store,
2731};
2732
2733static struct config_item_type target_core_hba_cit = {
2734 .ct_item_ops = &target_core_hba_item_ops,
2735 .ct_group_ops = &target_core_hba_group_ops,
2736 .ct_attrs = target_core_hba_attrs,
2737 .ct_owner = THIS_MODULE,
2738};
2739
2740static struct config_group *target_core_call_addhbatotarget(
2741 struct config_group *group,
2742 const char *name)
2743{
2744 char *se_plugin_str, *str, *str2;
2745 struct se_hba *hba;
2746 char buf[TARGET_CORE_NAME_MAX_LEN];
2747 unsigned long plugin_dep_id = 0;
2748 int ret;
2749
2750 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
2751 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
2752 pr_err("Passed *name strlen(): %d exceeds"
2753 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
2754 TARGET_CORE_NAME_MAX_LEN);
2755 return ERR_PTR(-ENAMETOOLONG);
2756 }
2757 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
2758
2759 str = strstr(buf, "_");
2760 if (!str) {
2761 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
2762 return ERR_PTR(-EINVAL);
2763 }
2764 se_plugin_str = buf;
2765
2766
2767
2768
2769 str2 = strstr(str+1, "_");
2770 if (str2) {
2771 *str2 = '\0';
2772 str2++;
2773 str = str2;
2774 } else {
2775 *str = '\0';
2776 str++;
2777 }
2778
2779 ret = kstrtoul(str, 0, &plugin_dep_id);
2780 if (ret < 0) {
2781 pr_err("kstrtoul() returned %d for"
2782 " plugin_dep_id\n", ret);
2783 return ERR_PTR(ret);
2784 }
2785
2786
2787
2788 transport_subsystem_check_init();
2789
2790 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
2791 if (IS_ERR(hba))
2792 return ERR_CAST(hba);
2793
2794 config_group_init_type_name(&hba->hba_group, name,
2795 &target_core_hba_cit);
2796
2797 return &hba->hba_group;
2798}
2799
2800static void target_core_call_delhbafromtarget(
2801 struct config_group *group,
2802 struct config_item *item)
2803{
2804
2805
2806
2807
2808 config_item_put(item);
2809}
2810
2811static struct configfs_group_operations target_core_group_ops = {
2812 .make_group = target_core_call_addhbatotarget,
2813 .drop_item = target_core_call_delhbafromtarget,
2814};
2815
2816static struct config_item_type target_core_cit = {
2817 .ct_item_ops = NULL,
2818 .ct_group_ops = &target_core_group_ops,
2819 .ct_attrs = NULL,
2820 .ct_owner = THIS_MODULE,
2821};
2822
2823
2824
2825static int __init target_core_init_configfs(void)
2826{
2827 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
2828 struct config_group *lu_gp_cg = NULL;
2829 struct configfs_subsystem *subsys;
2830 struct t10_alua_lu_gp *lu_gp;
2831 int ret;
2832
2833 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
2834 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
2835 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
2836
2837 subsys = target_core_subsystem[0];
2838 config_group_init(&subsys->su_group);
2839 mutex_init(&subsys->su_mutex);
2840
2841 ret = init_se_kmem_caches();
2842 if (ret < 0)
2843 return ret;
2844
2845
2846
2847
2848 target_cg = &subsys->su_group;
2849 target_cg->default_groups = kmalloc(sizeof(struct config_group) * 2,
2850 GFP_KERNEL);
2851 if (!target_cg->default_groups) {
2852 pr_err("Unable to allocate target_cg->default_groups\n");
2853 ret = -ENOMEM;
2854 goto out_global;
2855 }
2856
2857 config_group_init_type_name(&target_core_hbagroup,
2858 "core", &target_core_cit);
2859 target_cg->default_groups[0] = &target_core_hbagroup;
2860 target_cg->default_groups[1] = NULL;
2861
2862
2863
2864 hba_cg = &target_core_hbagroup;
2865 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2866 GFP_KERNEL);
2867 if (!hba_cg->default_groups) {
2868 pr_err("Unable to allocate hba_cg->default_groups\n");
2869 ret = -ENOMEM;
2870 goto out_global;
2871 }
2872 config_group_init_type_name(&alua_group,
2873 "alua", &target_core_alua_cit);
2874 hba_cg->default_groups[0] = &alua_group;
2875 hba_cg->default_groups[1] = NULL;
2876
2877
2878
2879
2880 alua_cg = &alua_group;
2881 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2882 GFP_KERNEL);
2883 if (!alua_cg->default_groups) {
2884 pr_err("Unable to allocate alua_cg->default_groups\n");
2885 ret = -ENOMEM;
2886 goto out_global;
2887 }
2888
2889 config_group_init_type_name(&alua_lu_gps_group,
2890 "lu_gps", &target_core_alua_lu_gps_cit);
2891 alua_cg->default_groups[0] = &alua_lu_gps_group;
2892 alua_cg->default_groups[1] = NULL;
2893
2894
2895
2896 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
2897 if (IS_ERR(lu_gp)) {
2898 ret = -ENOMEM;
2899 goto out_global;
2900 }
2901
2902 lu_gp_cg = &alua_lu_gps_group;
2903 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2904 GFP_KERNEL);
2905 if (!lu_gp_cg->default_groups) {
2906 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
2907 ret = -ENOMEM;
2908 goto out_global;
2909 }
2910
2911 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
2912 &target_core_alua_lu_gp_cit);
2913 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
2914 lu_gp_cg->default_groups[1] = NULL;
2915 default_lu_gp = lu_gp;
2916
2917
2918
2919 ret = configfs_register_subsystem(subsys);
2920 if (ret < 0) {
2921 pr_err("Error %d while registering subsystem %s\n",
2922 ret, subsys->su_group.cg_item.ci_namebuf);
2923 goto out_global;
2924 }
2925 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
2926 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
2927 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
2928
2929
2930
2931 ret = rd_module_init();
2932 if (ret < 0)
2933 goto out;
2934
2935 ret = core_dev_setup_virtual_lun0();
2936 if (ret < 0)
2937 goto out;
2938
2939 ret = target_xcopy_setup_pt();
2940 if (ret < 0)
2941 goto out;
2942
2943 return 0;
2944
2945out:
2946 configfs_unregister_subsystem(subsys);
2947 core_dev_release_virtual_lun0();
2948 rd_module_exit();
2949out_global:
2950 if (default_lu_gp) {
2951 core_alua_free_lu_gp(default_lu_gp);
2952 default_lu_gp = NULL;
2953 }
2954 if (lu_gp_cg)
2955 kfree(lu_gp_cg->default_groups);
2956 if (alua_cg)
2957 kfree(alua_cg->default_groups);
2958 if (hba_cg)
2959 kfree(hba_cg->default_groups);
2960 kfree(target_cg->default_groups);
2961 release_se_kmem_caches();
2962 return ret;
2963}
2964
2965static void __exit target_core_exit_configfs(void)
2966{
2967 struct configfs_subsystem *subsys;
2968 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
2969 struct config_item *item;
2970 int i;
2971
2972 subsys = target_core_subsystem[0];
2973
2974 lu_gp_cg = &alua_lu_gps_group;
2975 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
2976 item = &lu_gp_cg->default_groups[i]->cg_item;
2977 lu_gp_cg->default_groups[i] = NULL;
2978 config_item_put(item);
2979 }
2980 kfree(lu_gp_cg->default_groups);
2981 lu_gp_cg->default_groups = NULL;
2982
2983 alua_cg = &alua_group;
2984 for (i = 0; alua_cg->default_groups[i]; i++) {
2985 item = &alua_cg->default_groups[i]->cg_item;
2986 alua_cg->default_groups[i] = NULL;
2987 config_item_put(item);
2988 }
2989 kfree(alua_cg->default_groups);
2990 alua_cg->default_groups = NULL;
2991
2992 hba_cg = &target_core_hbagroup;
2993 for (i = 0; hba_cg->default_groups[i]; i++) {
2994 item = &hba_cg->default_groups[i]->cg_item;
2995 hba_cg->default_groups[i] = NULL;
2996 config_item_put(item);
2997 }
2998 kfree(hba_cg->default_groups);
2999 hba_cg->default_groups = NULL;
3000
3001
3002
3003
3004 configfs_unregister_subsystem(subsys);
3005 kfree(subsys->su_group.default_groups);
3006
3007 core_alua_free_lu_gp(default_lu_gp);
3008 default_lu_gp = NULL;
3009
3010 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3011 " Infrastructure\n");
3012
3013 core_dev_release_virtual_lun0();
3014 rd_module_exit();
3015 target_xcopy_release_pt();
3016 release_se_kmem_caches();
3017}
3018
3019MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3020MODULE_AUTHOR("nab@Linux-iSCSI.org");
3021MODULE_LICENSE("GPL");
3022
3023module_init(target_core_init_configfs);
3024module_exit(target_core_exit_configfs);
3025
