Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvar...
[linux-2.6.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2  * Filename:  target_core_configfs.c
3  *
4  * This file contains ConfigFS logic for the Generic Target Engine project.
5  *
6  * Copyright (c) 2008-2011 Rising Tide Systems
7  * Copyright (c) 2008-2011 Linux-iSCSI.org
8  *
9  * Nicholas A. Bellinger <nab@kernel.org>
10  *
11  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  ****************************************************************************/
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <generated/utsrelease.h>
27 #include <linux/utsname.h>
28 #include <linux/init.h>
29 #include <linux/fs.h>
30 #include <linux/namei.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/delay.h>
34 #include <linux/unistd.h>
35 #include <linux/string.h>
36 #include <linux/parser.h>
37 #include <linux/syscalls.h>
38 #include <linux/configfs.h>
39 #include <linux/spinlock.h>
40
41 #include <target/target_core_base.h>
42 #include <target/target_core_backend.h>
43 #include <target/target_core_fabric.h>
44 #include <target/target_core_fabric_configfs.h>
45 #include <target/target_core_configfs.h>
46 #include <target/configfs_macros.h>
47
48 #include "target_core_internal.h"
49 #include "target_core_alua.h"
50 #include "target_core_pr.h"
51 #include "target_core_rd.h"
52
53 extern struct t10_alua_lu_gp *default_lu_gp;
54
55 static LIST_HEAD(g_tf_list);
56 static DEFINE_MUTEX(g_tf_lock);
57
58 struct 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
64 static struct config_group target_core_hbagroup;
65 static struct config_group alua_group;
66 static struct config_group alua_lu_gps_group;
67
68 static inline struct se_hba *
69 item_to_hba(struct config_item *item)
70 {
71         return container_of(to_config_group(item), struct se_hba, hba_group);
72 }
73
74 /*
75  * Attributes for /sys/kernel/config/target/
76  */
77 static 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
86 static struct configfs_item_operations target_core_fabric_item_ops = {
87         .show_attribute = target_core_attr_show,
88 };
89
90 static struct configfs_attribute target_core_item_attr_version = {
91         .ca_owner       = THIS_MODULE,
92         .ca_name        = "version",
93         .ca_mode        = S_IRUGO,
94 };
95
96 static 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  * Called from struct target_core_group_ops->make_group()
119  */
120 static 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          * Below are some hardcoded request_module() calls to automatically
131          * local fabric modules when the following is called:
132          *
133          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134          *
135          * Note that this does not limit which TCM fabric module can be
136          * registered, but simply provids auto loading logic for modules with
137          * mkdir(2) system calls with known TCM fabric modules.
138          */
139         if (!strncmp(name, "iscsi", 5)) {
140                 /*
141                  * Automatically load the LIO Target fabric module when the
142                  * following is called:
143                  *
144                  * mkdir -p $CONFIGFS/target/iscsi
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                  * Automatically load the tcm_loop fabric module when the
155                  * following is called:
156                  *
157                  * mkdir -p $CONFIGFS/target/loopback
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          * On a successful target_core_get_fabric() look, the returned
177          * struct target_fabric_configfs *tf will contain a usage reference.
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          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
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  * Called from struct target_core_group_ops->drop_item()
206  */
207 static 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
240 static 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  * All item attributes appearing in /sys/kernel/target/ appear here.
247  */
248 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249         &target_core_item_attr_version,
250         NULL,
251 };
252
253 /*
254  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255  */
256 static 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
263 static 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
272 static struct configfs_subsystem *target_core_subsystem[] = {
273         &target_core_fabrics,
274         NULL,
275 };
276
277 /*##############################################################################
278 // Start functions called by external Target Fabrics Modules
279 //############################################################################*/
280
281 /*
282  * First function called by fabric modules to:
283  *
284  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285  * 2) Add struct target_fabric_configfs to g_tf_list
286  * 3) Return struct target_fabric_configfs to fabric module to be passed
287  *    into target_fabric_configfs_register().
288  */
289 struct 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          * Setup the default generic struct config_item_type's (cits) in
313          * struct target_fabric_configfs->tf_cit_tmpl
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 }
331 EXPORT_SYMBOL(target_fabric_configfs_init);
332
333 /*
334  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335  */
336 void 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 }
345 EXPORT_SYMBOL(target_fabric_configfs_free);
346
347 /*
348  * Perform a sanity check of the passed tf->tf_ops before completing
349  * TCM fabric module registration.
350  */
351 static 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         if (!tfo->set_fabric_sense_len) {
461                 pr_err("Missing tfo->set_fabric_sense_len()\n");
462                 return -EINVAL;
463         }
464         if (!tfo->get_fabric_sense_len) {
465                 pr_err("Missing tfo->get_fabric_sense_len()\n");
466                 return -EINVAL;
467         }
468         /*
469          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
470          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
471          * target_core_fabric_configfs.c WWN+TPG group context code.
472          */
473         if (!tfo->fabric_make_wwn) {
474                 pr_err("Missing tfo->fabric_make_wwn()\n");
475                 return -EINVAL;
476         }
477         if (!tfo->fabric_drop_wwn) {
478                 pr_err("Missing tfo->fabric_drop_wwn()\n");
479                 return -EINVAL;
480         }
481         if (!tfo->fabric_make_tpg) {
482                 pr_err("Missing tfo->fabric_make_tpg()\n");
483                 return -EINVAL;
484         }
485         if (!tfo->fabric_drop_tpg) {
486                 pr_err("Missing tfo->fabric_drop_tpg()\n");
487                 return -EINVAL;
488         }
489
490         return 0;
491 }
492
493 /*
494  * Called 2nd from fabric module with returned parameter of
495  * struct target_fabric_configfs * from target_fabric_configfs_init().
496  *
497  * Upon a successful registration, the new fabric's struct config_item is
498  * return.  Also, a pointer to this struct is set in the passed
499  * struct target_fabric_configfs.
500  */
501 int target_fabric_configfs_register(
502         struct target_fabric_configfs *tf)
503 {
504         int ret;
505
506         if (!tf) {
507                 pr_err("Unable to locate target_fabric_configfs"
508                         " pointer\n");
509                 return -EINVAL;
510         }
511         if (!tf->tf_subsys) {
512                 pr_err("Unable to target struct config_subsystem"
513                         " pointer\n");
514                 return -EINVAL;
515         }
516         ret = target_fabric_tf_ops_check(tf);
517         if (ret < 0)
518                 return ret;
519
520         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
521                 ">>>>>>>>>>\n");
522         return 0;
523 }
524 EXPORT_SYMBOL(target_fabric_configfs_register);
525
526 void target_fabric_configfs_deregister(
527         struct target_fabric_configfs *tf)
528 {
529         struct configfs_subsystem *su;
530
531         if (!tf) {
532                 pr_err("Unable to locate passed target_fabric_"
533                         "configfs\n");
534                 return;
535         }
536         su = tf->tf_subsys;
537         if (!su) {
538                 pr_err("Unable to locate passed tf->tf_subsys"
539                         " pointer\n");
540                 return;
541         }
542         pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
543                         ">>>>>>>>>>>>\n");
544         mutex_lock(&g_tf_lock);
545         if (atomic_read(&tf->tf_access_cnt)) {
546                 mutex_unlock(&g_tf_lock);
547                 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
548                         tf->tf_name);
549                 BUG();
550         }
551         list_del(&tf->tf_list);
552         mutex_unlock(&g_tf_lock);
553
554         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
555                         " %s\n", tf->tf_name);
556         tf->tf_module = NULL;
557         tf->tf_subsys = NULL;
558         kfree(tf);
559
560         pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
561                         ">>>>>\n");
562 }
563 EXPORT_SYMBOL(target_fabric_configfs_deregister);
564
565 /*##############################################################################
566 // Stop functions called by external Target Fabrics Modules
567 //############################################################################*/
568
569 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
570
571 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
572 static ssize_t target_core_dev_show_attr_##_name(                       \
573         struct se_dev_attrib *da,                                       \
574         char *page)                                                     \
575 {                                                                       \
576         struct se_device *dev;                                          \
577         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
578         ssize_t rb;                                                     \
579                                                                         \
580         spin_lock(&se_dev->se_dev_lock);                                \
581         dev = se_dev->se_dev_ptr;                                       \
582         if (!dev) {                                                     \
583                 spin_unlock(&se_dev->se_dev_lock);                      \
584                 return -ENODEV;                                         \
585         }                                                               \
586         rb = snprintf(page, PAGE_SIZE, "%u\n",                          \
587                 (u32)dev->se_sub_dev->se_dev_attrib._name);             \
588         spin_unlock(&se_dev->se_dev_lock);                              \
589                                                                         \
590         return rb;                                                      \
591 }
592
593 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
594 static ssize_t target_core_dev_store_attr_##_name(                      \
595         struct se_dev_attrib *da,                                       \
596         const char *page,                                               \
597         size_t count)                                                   \
598 {                                                                       \
599         struct se_device *dev;                                          \
600         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
601         unsigned long val;                                              \
602         int ret;                                                        \
603                                                                         \
604         spin_lock(&se_dev->se_dev_lock);                                \
605         dev = se_dev->se_dev_ptr;                                       \
606         if (!dev) {                                                     \
607                 spin_unlock(&se_dev->se_dev_lock);                      \
608                 return -ENODEV;                                         \
609         }                                                               \
610         ret = strict_strtoul(page, 0, &val);                            \
611         if (ret < 0) {                                                  \
612                 spin_unlock(&se_dev->se_dev_lock);                      \
613                 pr_err("strict_strtoul() failed with"           \
614                         " ret: %d\n", ret);                             \
615                 return -EINVAL;                                         \
616         }                                                               \
617         ret = se_dev_set_##_name(dev, (u32)val);                        \
618         spin_unlock(&se_dev->se_dev_lock);                              \
619                                                                         \
620         return (!ret) ? count : -EINVAL;                                \
621 }
622
623 #define DEF_DEV_ATTRIB(_name)                                           \
624 DEF_DEV_ATTRIB_SHOW(_name);                                             \
625 DEF_DEV_ATTRIB_STORE(_name);
626
627 #define DEF_DEV_ATTRIB_RO(_name)                                        \
628 DEF_DEV_ATTRIB_SHOW(_name);
629
630 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
631 #define SE_DEV_ATTR(_name, _mode)                                       \
632 static struct target_core_dev_attrib_attribute                          \
633                         target_core_dev_attrib_##_name =                \
634                 __CONFIGFS_EATTR(_name, _mode,                          \
635                 target_core_dev_show_attr_##_name,                      \
636                 target_core_dev_store_attr_##_name);
637
638 #define SE_DEV_ATTR_RO(_name);                                          \
639 static struct target_core_dev_attrib_attribute                          \
640                         target_core_dev_attrib_##_name =                \
641         __CONFIGFS_EATTR_RO(_name,                                      \
642         target_core_dev_show_attr_##_name);
643
644 DEF_DEV_ATTRIB(emulate_dpo);
645 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
646
647 DEF_DEV_ATTRIB(emulate_fua_write);
648 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
649
650 DEF_DEV_ATTRIB(emulate_fua_read);
651 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
652
653 DEF_DEV_ATTRIB(emulate_write_cache);
654 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
655
656 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
657 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
658
659 DEF_DEV_ATTRIB(emulate_tas);
660 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
661
662 DEF_DEV_ATTRIB(emulate_tpu);
663 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
664
665 DEF_DEV_ATTRIB(emulate_tpws);
666 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
667
668 DEF_DEV_ATTRIB(enforce_pr_isids);
669 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
670
671 DEF_DEV_ATTRIB(is_nonrot);
672 SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
673
674 DEF_DEV_ATTRIB(emulate_rest_reord);
675 SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
676
677 DEF_DEV_ATTRIB_RO(hw_block_size);
678 SE_DEV_ATTR_RO(hw_block_size);
679
680 DEF_DEV_ATTRIB(block_size);
681 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
682
683 DEF_DEV_ATTRIB_RO(hw_max_sectors);
684 SE_DEV_ATTR_RO(hw_max_sectors);
685
686 DEF_DEV_ATTRIB(max_sectors);
687 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
688
689 DEF_DEV_ATTRIB(fabric_max_sectors);
690 SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
691
692 DEF_DEV_ATTRIB(optimal_sectors);
693 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
694
695 DEF_DEV_ATTRIB_RO(hw_queue_depth);
696 SE_DEV_ATTR_RO(hw_queue_depth);
697
698 DEF_DEV_ATTRIB(queue_depth);
699 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
700
701 DEF_DEV_ATTRIB(max_unmap_lba_count);
702 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
703
704 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
705 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
706
707 DEF_DEV_ATTRIB(unmap_granularity);
708 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
709
710 DEF_DEV_ATTRIB(unmap_granularity_alignment);
711 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
712
713 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
714
715 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
716         &target_core_dev_attrib_emulate_dpo.attr,
717         &target_core_dev_attrib_emulate_fua_write.attr,
718         &target_core_dev_attrib_emulate_fua_read.attr,
719         &target_core_dev_attrib_emulate_write_cache.attr,
720         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
721         &target_core_dev_attrib_emulate_tas.attr,
722         &target_core_dev_attrib_emulate_tpu.attr,
723         &target_core_dev_attrib_emulate_tpws.attr,
724         &target_core_dev_attrib_enforce_pr_isids.attr,
725         &target_core_dev_attrib_is_nonrot.attr,
726         &target_core_dev_attrib_emulate_rest_reord.attr,
727         &target_core_dev_attrib_hw_block_size.attr,
728         &target_core_dev_attrib_block_size.attr,
729         &target_core_dev_attrib_hw_max_sectors.attr,
730         &target_core_dev_attrib_max_sectors.attr,
731         &target_core_dev_attrib_fabric_max_sectors.attr,
732         &target_core_dev_attrib_optimal_sectors.attr,
733         &target_core_dev_attrib_hw_queue_depth.attr,
734         &target_core_dev_attrib_queue_depth.attr,
735         &target_core_dev_attrib_max_unmap_lba_count.attr,
736         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
737         &target_core_dev_attrib_unmap_granularity.attr,
738         &target_core_dev_attrib_unmap_granularity_alignment.attr,
739         NULL,
740 };
741
742 static struct configfs_item_operations target_core_dev_attrib_ops = {
743         .show_attribute         = target_core_dev_attrib_attr_show,
744         .store_attribute        = target_core_dev_attrib_attr_store,
745 };
746
747 static struct config_item_type target_core_dev_attrib_cit = {
748         .ct_item_ops            = &target_core_dev_attrib_ops,
749         .ct_attrs               = target_core_dev_attrib_attrs,
750         .ct_owner               = THIS_MODULE,
751 };
752
753 /* End functions for struct config_item_type target_core_dev_attrib_cit */
754
755 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
756
757 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
758 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
759 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
760                 __CONFIGFS_EATTR(_name, _mode,                          \
761                 target_core_dev_wwn_show_attr_##_name,                  \
762                 target_core_dev_wwn_store_attr_##_name);
763
764 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
765 do {                                                                    \
766         static struct target_core_dev_wwn_attribute                     \
767                         target_core_dev_wwn_##_name =                   \
768                 __CONFIGFS_EATTR_RO(_name,                              \
769                 target_core_dev_wwn_show_attr_##_name);                 \
770 } while (0);
771
772 /*
773  * VPD page 0x80 Unit serial
774  */
775 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
776         struct t10_wwn *t10_wwn,
777         char *page)
778 {
779         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
780         struct se_device *dev;
781
782         dev = se_dev->se_dev_ptr;
783         if (!dev)
784                 return -ENODEV;
785
786         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
787                 &t10_wwn->unit_serial[0]);
788 }
789
790 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
791         struct t10_wwn *t10_wwn,
792         const char *page,
793         size_t count)
794 {
795         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
796         struct se_device *dev;
797         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
798
799         /*
800          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
801          * from the struct scsi_device level firmware, do not allow
802          * VPD Unit Serial to be emulated.
803          *
804          * Note this struct scsi_device could also be emulating VPD
805          * information from its drivers/scsi LLD.  But for now we assume
806          * it is doing 'the right thing' wrt a world wide unique
807          * VPD Unit Serial Number that OS dependent multipath can depend on.
808          */
809         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
810                 pr_err("Underlying SCSI device firmware provided VPD"
811                         " Unit Serial, ignoring request\n");
812                 return -EOPNOTSUPP;
813         }
814
815         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
816                 pr_err("Emulated VPD Unit Serial exceeds"
817                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
818                 return -EOVERFLOW;
819         }
820         /*
821          * Check to see if any active $FABRIC_MOD exports exist.  If they
822          * do exist, fail here as changing this information on the fly
823          * (underneath the initiator side OS dependent multipath code)
824          * could cause negative effects.
825          */
826         dev = su_dev->se_dev_ptr;
827         if (dev) {
828                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
829                         pr_err("Unable to set VPD Unit Serial while"
830                                 " active %d $FABRIC_MOD exports exist\n",
831                                 atomic_read(&dev->dev_export_obj.obj_access_count));
832                         return -EINVAL;
833                 }
834         }
835         /*
836          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
837          *
838          * Also, strip any newline added from the userspace
839          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
840          */
841         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
842         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
843         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
844                         "%s", strstrip(buf));
845         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
846
847         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
848                         " %s\n", su_dev->t10_wwn.unit_serial);
849
850         return count;
851 }
852
853 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
854
855 /*
856  * VPD page 0x83 Protocol Identifier
857  */
858 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
859         struct t10_wwn *t10_wwn,
860         char *page)
861 {
862         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
863         struct se_device *dev;
864         struct t10_vpd *vpd;
865         unsigned char buf[VPD_TMP_BUF_SIZE];
866         ssize_t len = 0;
867
868         dev = se_dev->se_dev_ptr;
869         if (!dev)
870                 return -ENODEV;
871
872         memset(buf, 0, VPD_TMP_BUF_SIZE);
873
874         spin_lock(&t10_wwn->t10_vpd_lock);
875         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
876                 if (!vpd->protocol_identifier_set)
877                         continue;
878
879                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
880
881                 if (len + strlen(buf) >= PAGE_SIZE)
882                         break;
883
884                 len += sprintf(page+len, "%s", buf);
885         }
886         spin_unlock(&t10_wwn->t10_vpd_lock);
887
888         return len;
889 }
890
891 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
892         struct t10_wwn *t10_wwn,
893         const char *page,
894         size_t count)
895 {
896         return -ENOSYS;
897 }
898
899 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
900
901 /*
902  * Generic wrapper for dumping VPD identifiers by association.
903  */
904 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
905 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
906         struct t10_wwn *t10_wwn,                                        \
907         char *page)                                                     \
908 {                                                                       \
909         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
910         struct se_device *dev;                                          \
911         struct t10_vpd *vpd;                                                    \
912         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
913         ssize_t len = 0;                                                \
914                                                                         \
915         dev = se_dev->se_dev_ptr;                                       \
916         if (!dev)                                                       \
917                 return -ENODEV;                                         \
918                                                                         \
919         spin_lock(&t10_wwn->t10_vpd_lock);                              \
920         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
921                 if (vpd->association != _assoc)                         \
922                         continue;                                       \
923                                                                         \
924                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
925                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
926                 if (len + strlen(buf) >= PAGE_SIZE)                     \
927                         break;                                          \
928                 len += sprintf(page+len, "%s", buf);                    \
929                                                                         \
930                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
931                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
932                 if (len + strlen(buf) >= PAGE_SIZE)                     \
933                         break;                                          \
934                 len += sprintf(page+len, "%s", buf);                    \
935                                                                         \
936                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
937                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
938                 if (len + strlen(buf) >= PAGE_SIZE)                     \
939                         break;                                          \
940                 len += sprintf(page+len, "%s", buf);                    \
941         }                                                               \
942         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
943                                                                         \
944         return len;                                                     \
945 }
946
947 /*
948  * VPD page 0x83 Association: Logical Unit
949  */
950 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
951
952 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
953         struct t10_wwn *t10_wwn,
954         const char *page,
955         size_t count)
956 {
957         return -ENOSYS;
958 }
959
960 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
961
962 /*
963  * VPD page 0x83 Association: Target Port
964  */
965 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
966
967 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
968         struct t10_wwn *t10_wwn,
969         const char *page,
970         size_t count)
971 {
972         return -ENOSYS;
973 }
974
975 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
976
977 /*
978  * VPD page 0x83 Association: SCSI Target Device
979  */
980 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
981
982 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
983         struct t10_wwn *t10_wwn,
984         const char *page,
985         size_t count)
986 {
987         return -ENOSYS;
988 }
989
990 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
991
992 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
993
994 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
995         &target_core_dev_wwn_vpd_unit_serial.attr,
996         &target_core_dev_wwn_vpd_protocol_identifier.attr,
997         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
998         &target_core_dev_wwn_vpd_assoc_target_port.attr,
999         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1000         NULL,
1001 };
1002
1003 static struct configfs_item_operations target_core_dev_wwn_ops = {
1004         .show_attribute         = target_core_dev_wwn_attr_show,
1005         .store_attribute        = target_core_dev_wwn_attr_store,
1006 };
1007
1008 static struct config_item_type target_core_dev_wwn_cit = {
1009         .ct_item_ops            = &target_core_dev_wwn_ops,
1010         .ct_attrs               = target_core_dev_wwn_attrs,
1011         .ct_owner               = THIS_MODULE,
1012 };
1013
1014 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1015
1016 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1017
1018 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1019 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1020 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1021         __CONFIGFS_EATTR(_name, _mode,                                  \
1022         target_core_dev_pr_show_attr_##_name,                           \
1023         target_core_dev_pr_store_attr_##_name);
1024
1025 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1026 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1027         __CONFIGFS_EATTR_RO(_name,                                      \
1028         target_core_dev_pr_show_attr_##_name);
1029
1030 /*
1031  * res_holder
1032  */
1033 static ssize_t target_core_dev_pr_show_spc3_res(
1034         struct se_device *dev,
1035         char *page,
1036         ssize_t *len)
1037 {
1038         struct se_node_acl *se_nacl;
1039         struct t10_pr_registration *pr_reg;
1040         char i_buf[PR_REG_ISID_ID_LEN];
1041         int prf_isid;
1042
1043         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1044
1045         spin_lock(&dev->dev_reservation_lock);
1046         pr_reg = dev->dev_pr_res_holder;
1047         if (!pr_reg) {
1048                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1049                 spin_unlock(&dev->dev_reservation_lock);
1050                 return *len;
1051         }
1052         se_nacl = pr_reg->pr_reg_nacl;
1053         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1054                                 PR_REG_ISID_ID_LEN);
1055
1056         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1057                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1058                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1059         spin_unlock(&dev->dev_reservation_lock);
1060
1061         return *len;
1062 }
1063
1064 static ssize_t target_core_dev_pr_show_spc2_res(
1065         struct se_device *dev,
1066         char *page,
1067         ssize_t *len)
1068 {
1069         struct se_node_acl *se_nacl;
1070
1071         spin_lock(&dev->dev_reservation_lock);
1072         se_nacl = dev->dev_reserved_node_acl;
1073         if (!se_nacl) {
1074                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1075                 spin_unlock(&dev->dev_reservation_lock);
1076                 return *len;
1077         }
1078         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1079                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1080                 se_nacl->initiatorname);
1081         spin_unlock(&dev->dev_reservation_lock);
1082
1083         return *len;
1084 }
1085
1086 static ssize_t target_core_dev_pr_show_attr_res_holder(
1087         struct se_subsystem_dev *su_dev,
1088         char *page)
1089 {
1090         ssize_t len = 0;
1091
1092         if (!su_dev->se_dev_ptr)
1093                 return -ENODEV;
1094
1095         switch (su_dev->t10_pr.res_type) {
1096         case SPC3_PERSISTENT_RESERVATIONS:
1097                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1098                                 page, &len);
1099                 break;
1100         case SPC2_RESERVATIONS:
1101                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1102                                 page, &len);
1103                 break;
1104         case SPC_PASSTHROUGH:
1105                 len += sprintf(page+len, "Passthrough\n");
1106                 break;
1107         default:
1108                 len += sprintf(page+len, "Unknown\n");
1109                 break;
1110         }
1111
1112         return len;
1113 }
1114
1115 SE_DEV_PR_ATTR_RO(res_holder);
1116
1117 /*
1118  * res_pr_all_tgt_pts
1119  */
1120 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1121         struct se_subsystem_dev *su_dev,
1122         char *page)
1123 {
1124         struct se_device *dev;
1125         struct t10_pr_registration *pr_reg;
1126         ssize_t len = 0;
1127
1128         dev = su_dev->se_dev_ptr;
1129         if (!dev)
1130                 return -ENODEV;
1131
1132         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1133                 return len;
1134
1135         spin_lock(&dev->dev_reservation_lock);
1136         pr_reg = dev->dev_pr_res_holder;
1137         if (!pr_reg) {
1138                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1139                 spin_unlock(&dev->dev_reservation_lock);
1140                 return len;
1141         }
1142         /*
1143          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1144          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1145          */
1146         if (pr_reg->pr_reg_all_tg_pt)
1147                 len = sprintf(page, "SPC-3 Reservation: All Target"
1148                         " Ports registration\n");
1149         else
1150                 len = sprintf(page, "SPC-3 Reservation: Single"
1151                         " Target Port registration\n");
1152         spin_unlock(&dev->dev_reservation_lock);
1153
1154         return len;
1155 }
1156
1157 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1158
1159 /*
1160  * res_pr_generation
1161  */
1162 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1163         struct se_subsystem_dev *su_dev,
1164         char *page)
1165 {
1166         if (!su_dev->se_dev_ptr)
1167                 return -ENODEV;
1168
1169         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1170                 return 0;
1171
1172         return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1173 }
1174
1175 SE_DEV_PR_ATTR_RO(res_pr_generation);
1176
1177 /*
1178  * res_pr_holder_tg_port
1179  */
1180 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1181         struct se_subsystem_dev *su_dev,
1182         char *page)
1183 {
1184         struct se_device *dev;
1185         struct se_node_acl *se_nacl;
1186         struct se_lun *lun;
1187         struct se_portal_group *se_tpg;
1188         struct t10_pr_registration *pr_reg;
1189         struct target_core_fabric_ops *tfo;
1190         ssize_t len = 0;
1191
1192         dev = su_dev->se_dev_ptr;
1193         if (!dev)
1194                 return -ENODEV;
1195
1196         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1197                 return len;
1198
1199         spin_lock(&dev->dev_reservation_lock);
1200         pr_reg = dev->dev_pr_res_holder;
1201         if (!pr_reg) {
1202                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1203                 spin_unlock(&dev->dev_reservation_lock);
1204                 return len;
1205         }
1206         se_nacl = pr_reg->pr_reg_nacl;
1207         se_tpg = se_nacl->se_tpg;
1208         lun = pr_reg->pr_reg_tg_pt_lun;
1209         tfo = se_tpg->se_tpg_tfo;
1210
1211         len += sprintf(page+len, "SPC-3 Reservation: %s"
1212                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1213                 tfo->tpg_get_wwn(se_tpg));
1214         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1215                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1216                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1217                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1218                 tfo->get_fabric_name(), lun->unpacked_lun);
1219         spin_unlock(&dev->dev_reservation_lock);
1220
1221         return len;
1222 }
1223
1224 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1225
1226 /*
1227  * res_pr_registered_i_pts
1228  */
1229 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1230         struct se_subsystem_dev *su_dev,
1231         char *page)
1232 {
1233         struct target_core_fabric_ops *tfo;
1234         struct t10_pr_registration *pr_reg;
1235         unsigned char buf[384];
1236         char i_buf[PR_REG_ISID_ID_LEN];
1237         ssize_t len = 0;
1238         int reg_count = 0, prf_isid;
1239
1240         if (!su_dev->se_dev_ptr)
1241                 return -ENODEV;
1242
1243         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1244                 return len;
1245
1246         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1247
1248         spin_lock(&su_dev->t10_pr.registration_lock);
1249         list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1250                         pr_reg_list) {
1251
1252                 memset(buf, 0, 384);
1253                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1254                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1255                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1256                                         PR_REG_ISID_ID_LEN);
1257                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1258                         tfo->get_fabric_name(),
1259                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1260                         &i_buf[0] : "", pr_reg->pr_res_key,
1261                         pr_reg->pr_res_generation);
1262
1263                 if (len + strlen(buf) >= PAGE_SIZE)
1264                         break;
1265
1266                 len += sprintf(page+len, "%s", buf);
1267                 reg_count++;
1268         }
1269         spin_unlock(&su_dev->t10_pr.registration_lock);
1270
1271         if (!reg_count)
1272                 len += sprintf(page+len, "None\n");
1273
1274         return len;
1275 }
1276
1277 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1278
1279 /*
1280  * res_pr_type
1281  */
1282 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1283         struct se_subsystem_dev *su_dev,
1284         char *page)
1285 {
1286         struct se_device *dev;
1287         struct t10_pr_registration *pr_reg;
1288         ssize_t len = 0;
1289
1290         dev = su_dev->se_dev_ptr;
1291         if (!dev)
1292                 return -ENODEV;
1293
1294         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1295                 return len;
1296
1297         spin_lock(&dev->dev_reservation_lock);
1298         pr_reg = dev->dev_pr_res_holder;
1299         if (!pr_reg) {
1300                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1301                 spin_unlock(&dev->dev_reservation_lock);
1302                 return len;
1303         }
1304         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1305                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1306         spin_unlock(&dev->dev_reservation_lock);
1307
1308         return len;
1309 }
1310
1311 SE_DEV_PR_ATTR_RO(res_pr_type);
1312
1313 /*
1314  * res_type
1315  */
1316 static ssize_t target_core_dev_pr_show_attr_res_type(
1317         struct se_subsystem_dev *su_dev,
1318         char *page)
1319 {
1320         ssize_t len = 0;
1321
1322         if (!su_dev->se_dev_ptr)
1323                 return -ENODEV;
1324
1325         switch (su_dev->t10_pr.res_type) {
1326         case SPC3_PERSISTENT_RESERVATIONS:
1327                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1328                 break;
1329         case SPC2_RESERVATIONS:
1330                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1331                 break;
1332         case SPC_PASSTHROUGH:
1333                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1334                 break;
1335         default:
1336                 len = sprintf(page, "UNKNOWN\n");
1337                 break;
1338         }
1339
1340         return len;
1341 }
1342
1343 SE_DEV_PR_ATTR_RO(res_type);
1344
1345 /*
1346  * res_aptpl_active
1347  */
1348
1349 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1350         struct se_subsystem_dev *su_dev,
1351         char *page)
1352 {
1353         if (!su_dev->se_dev_ptr)
1354                 return -ENODEV;
1355
1356         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1357                 return 0;
1358
1359         return sprintf(page, "APTPL Bit Status: %s\n",
1360                 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1361 }
1362
1363 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1364
1365 /*
1366  * res_aptpl_metadata
1367  */
1368 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1369         struct se_subsystem_dev *su_dev,
1370         char *page)
1371 {
1372         if (!su_dev->se_dev_ptr)
1373                 return -ENODEV;
1374
1375         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1376                 return 0;
1377
1378         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1379 }
1380
1381 enum {
1382         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1383         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1384         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1385         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1386 };
1387
1388 static match_table_t tokens = {
1389         {Opt_initiator_fabric, "initiator_fabric=%s"},
1390         {Opt_initiator_node, "initiator_node=%s"},
1391         {Opt_initiator_sid, "initiator_sid=%s"},
1392         {Opt_sa_res_key, "sa_res_key=%s"},
1393         {Opt_res_holder, "res_holder=%d"},
1394         {Opt_res_type, "res_type=%d"},
1395         {Opt_res_scope, "res_scope=%d"},
1396         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1397         {Opt_mapped_lun, "mapped_lun=%d"},
1398         {Opt_target_fabric, "target_fabric=%s"},
1399         {Opt_target_node, "target_node=%s"},
1400         {Opt_tpgt, "tpgt=%d"},
1401         {Opt_port_rtpi, "port_rtpi=%d"},
1402         {Opt_target_lun, "target_lun=%d"},
1403         {Opt_err, NULL}
1404 };
1405
1406 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1407         struct se_subsystem_dev *su_dev,
1408         const char *page,
1409         size_t count)
1410 {
1411         struct se_device *dev;
1412         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1413         unsigned char *t_fabric = NULL, *t_port = NULL;
1414         char *orig, *ptr, *arg_p, *opts;
1415         substring_t args[MAX_OPT_ARGS];
1416         unsigned long long tmp_ll;
1417         u64 sa_res_key = 0;
1418         u32 mapped_lun = 0, target_lun = 0;
1419         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1420         u16 port_rpti = 0, tpgt = 0;
1421         u8 type = 0, scope;
1422
1423         dev = su_dev->se_dev_ptr;
1424         if (!dev)
1425                 return -ENODEV;
1426
1427         if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1428                 return 0;
1429
1430         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1431                 pr_debug("Unable to process APTPL metadata while"
1432                         " active fabric exports exist\n");
1433                 return -EINVAL;
1434         }
1435
1436         opts = kstrdup(page, GFP_KERNEL);
1437         if (!opts)
1438                 return -ENOMEM;
1439
1440         orig = opts;
1441         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1442                 if (!*ptr)
1443                         continue;
1444
1445                 token = match_token(ptr, tokens, args);
1446                 switch (token) {
1447                 case Opt_initiator_fabric:
1448                         i_fabric = match_strdup(&args[0]);
1449                         if (!i_fabric) {
1450                                 ret = -ENOMEM;
1451                                 goto out;
1452                         }
1453                         break;
1454                 case Opt_initiator_node:
1455                         i_port = match_strdup(&args[0]);
1456                         if (!i_port) {
1457                                 ret = -ENOMEM;
1458                                 goto out;
1459                         }
1460                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1461                                 pr_err("APTPL metadata initiator_node="
1462                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1463                                         PR_APTPL_MAX_IPORT_LEN);
1464                                 ret = -EINVAL;
1465                                 break;
1466                         }
1467                         break;
1468                 case Opt_initiator_sid:
1469                         isid = match_strdup(&args[0]);
1470                         if (!isid) {
1471                                 ret = -ENOMEM;
1472                                 goto out;
1473                         }
1474                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1475                                 pr_err("APTPL metadata initiator_isid"
1476                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1477                                         PR_REG_ISID_LEN);
1478                                 ret = -EINVAL;
1479                                 break;
1480                         }
1481                         break;
1482                 case Opt_sa_res_key:
1483                         arg_p = match_strdup(&args[0]);
1484                         if (!arg_p) {
1485                                 ret = -ENOMEM;
1486                                 goto out;
1487                         }
1488                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1489                         if (ret < 0) {
1490                                 pr_err("strict_strtoull() failed for"
1491                                         " sa_res_key=\n");
1492                                 goto out;
1493                         }
1494                         sa_res_key = (u64)tmp_ll;
1495                         break;
1496                 /*
1497                  * PR APTPL Metadata for Reservation
1498                  */
1499                 case Opt_res_holder:
1500                         match_int(args, &arg);
1501                         res_holder = arg;
1502                         break;
1503                 case Opt_res_type:
1504                         match_int(args, &arg);
1505                         type = (u8)arg;
1506                         break;
1507                 case Opt_res_scope:
1508                         match_int(args, &arg);
1509                         scope = (u8)arg;
1510                         break;
1511                 case Opt_res_all_tg_pt:
1512                         match_int(args, &arg);
1513                         all_tg_pt = (int)arg;
1514                         break;
1515                 case Opt_mapped_lun:
1516                         match_int(args, &arg);
1517                         mapped_lun = (u32)arg;
1518                         break;
1519                 /*
1520                  * PR APTPL Metadata for Target Port
1521                  */
1522                 case Opt_target_fabric:
1523                         t_fabric = match_strdup(&args[0]);
1524                         if (!t_fabric) {
1525                                 ret = -ENOMEM;
1526                                 goto out;
1527                         }
1528                         break;
1529                 case Opt_target_node:
1530                         t_port = match_strdup(&args[0]);
1531                         if (!t_port) {
1532                                 ret = -ENOMEM;
1533                                 goto out;
1534                         }
1535                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1536                                 pr_err("APTPL metadata target_node="
1537                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1538                                         PR_APTPL_MAX_TPORT_LEN);
1539                                 ret = -EINVAL;
1540                                 break;
1541                         }
1542                         break;
1543                 case Opt_tpgt:
1544                         match_int(args, &arg);
1545                         tpgt = (u16)arg;
1546                         break;
1547                 case Opt_port_rtpi:
1548                         match_int(args, &arg);
1549                         port_rpti = (u16)arg;
1550                         break;
1551                 case Opt_target_lun:
1552                         match_int(args, &arg);
1553                         target_lun = (u32)arg;
1554                         break;
1555                 default:
1556                         break;
1557                 }
1558         }
1559
1560         if (!i_port || !t_port || !sa_res_key) {
1561                 pr_err("Illegal parameters for APTPL registration\n");
1562                 ret = -EINVAL;
1563                 goto out;
1564         }
1565
1566         if (res_holder && !(type)) {
1567                 pr_err("Illegal PR type: 0x%02x for reservation"
1568                                 " holder\n", type);
1569                 ret = -EINVAL;
1570                 goto out;
1571         }
1572
1573         ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1574                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1575                         res_holder, all_tg_pt, type);
1576 out:
1577         kfree(i_fabric);
1578         kfree(i_port);
1579         kfree(isid);
1580         kfree(t_fabric);
1581         kfree(t_port);
1582         kfree(orig);
1583         return (ret == 0) ? count : ret;
1584 }
1585
1586 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1587
1588 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1589
1590 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1591         &target_core_dev_pr_res_holder.attr,
1592         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1593         &target_core_dev_pr_res_pr_generation.attr,
1594         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1595         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1596         &target_core_dev_pr_res_pr_type.attr,
1597         &target_core_dev_pr_res_type.attr,
1598         &target_core_dev_pr_res_aptpl_active.attr,
1599         &target_core_dev_pr_res_aptpl_metadata.attr,
1600         NULL,
1601 };
1602
1603 static struct configfs_item_operations target_core_dev_pr_ops = {
1604         .show_attribute         = target_core_dev_pr_attr_show,
1605         .store_attribute        = target_core_dev_pr_attr_store,
1606 };
1607
1608 static struct config_item_type target_core_dev_pr_cit = {
1609         .ct_item_ops            = &target_core_dev_pr_ops,
1610         .ct_attrs               = target_core_dev_pr_attrs,
1611         .ct_owner               = THIS_MODULE,
1612 };
1613
1614 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1615
1616 /*  Start functions for struct config_item_type target_core_dev_cit */
1617
1618 static ssize_t target_core_show_dev_info(void *p, char *page)
1619 {
1620         struct se_subsystem_dev *se_dev = p;
1621         struct se_hba *hba = se_dev->se_dev_hba;
1622         struct se_subsystem_api *t = hba->transport;
1623         int bl = 0;
1624         ssize_t read_bytes = 0;
1625
1626         if (!se_dev->se_dev_ptr)
1627                 return -ENODEV;
1628
1629         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1630         read_bytes += bl;
1631         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1632         return read_bytes;
1633 }
1634
1635 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1636         .attr   = { .ca_owner = THIS_MODULE,
1637                     .ca_name = "info",
1638                     .ca_mode = S_IRUGO },
1639         .show   = target_core_show_dev_info,
1640         .store  = NULL,
1641 };
1642
1643 static ssize_t target_core_store_dev_control(
1644         void *p,
1645         const char *page,
1646         size_t count)
1647 {
1648         struct se_subsystem_dev *se_dev = p;
1649         struct se_hba *hba = se_dev->se_dev_hba;
1650         struct se_subsystem_api *t = hba->transport;
1651
1652         if (!se_dev->se_dev_su_ptr) {
1653                 pr_err("Unable to locate struct se_subsystem_dev>se"
1654                                 "_dev_su_ptr\n");
1655                 return -EINVAL;
1656         }
1657
1658         return t->set_configfs_dev_params(hba, se_dev, page, count);
1659 }
1660
1661 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1662         .attr   = { .ca_owner = THIS_MODULE,
1663                     .ca_name = "control",
1664                     .ca_mode = S_IWUSR },
1665         .show   = NULL,
1666         .store  = target_core_store_dev_control,
1667 };
1668
1669 static ssize_t target_core_show_dev_alias(void *p, char *page)
1670 {
1671         struct se_subsystem_dev *se_dev = p;
1672
1673         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1674                 return 0;
1675
1676         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1677 }
1678
1679 static ssize_t target_core_store_dev_alias(
1680         void *p,
1681         const char *page,
1682         size_t count)
1683 {
1684         struct se_subsystem_dev *se_dev = p;
1685         struct se_hba *hba = se_dev->se_dev_hba;
1686         ssize_t read_bytes;
1687
1688         if (count > (SE_DEV_ALIAS_LEN-1)) {
1689                 pr_err("alias count: %d exceeds"
1690                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1691                         SE_DEV_ALIAS_LEN-1);
1692                 return -EINVAL;
1693         }
1694
1695         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1696                         "%s", page);
1697         if (!read_bytes)
1698                 return -EINVAL;
1699         if (se_dev->se_dev_alias[read_bytes - 1] == '\n')
1700                 se_dev->se_dev_alias[read_bytes - 1] = '\0';
1701
1702         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1703
1704         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1705                 config_item_name(&hba->hba_group.cg_item),
1706                 config_item_name(&se_dev->se_dev_group.cg_item),
1707                 se_dev->se_dev_alias);
1708
1709         return read_bytes;
1710 }
1711
1712 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1713         .attr   = { .ca_owner = THIS_MODULE,
1714                     .ca_name = "alias",
1715                     .ca_mode =  S_IRUGO | S_IWUSR },
1716         .show   = target_core_show_dev_alias,
1717         .store  = target_core_store_dev_alias,
1718 };
1719
1720 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1721 {
1722         struct se_subsystem_dev *se_dev = p;
1723
1724         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1725                 return 0;
1726
1727         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1728 }
1729
1730 static ssize_t target_core_store_dev_udev_path(
1731         void *p,
1732         const char *page,
1733         size_t count)
1734 {
1735         struct se_subsystem_dev *se_dev = p;
1736         struct se_hba *hba = se_dev->se_dev_hba;
1737         ssize_t read_bytes;
1738
1739         if (count > (SE_UDEV_PATH_LEN-1)) {
1740                 pr_err("udev_path count: %d exceeds"
1741                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1742                         SE_UDEV_PATH_LEN-1);
1743                 return -EINVAL;
1744         }
1745
1746         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1747                         "%s", page);
1748         if (!read_bytes)
1749                 return -EINVAL;
1750         if (se_dev->se_dev_udev_path[read_bytes - 1] == '\n')
1751                 se_dev->se_dev_udev_path[read_bytes - 1] = '\0';
1752
1753         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1754
1755         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1756                 config_item_name(&hba->hba_group.cg_item),
1757                 config_item_name(&se_dev->se_dev_group.cg_item),
1758                 se_dev->se_dev_udev_path);
1759
1760         return read_bytes;
1761 }
1762
1763 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1764         .attr   = { .ca_owner = THIS_MODULE,
1765                     .ca_name = "udev_path",
1766                     .ca_mode =  S_IRUGO | S_IWUSR },
1767         .show   = target_core_show_dev_udev_path,
1768         .store  = target_core_store_dev_udev_path,
1769 };
1770
1771 static ssize_t target_core_store_dev_enable(
1772         void *p,
1773         const char *page,
1774         size_t count)
1775 {
1776         struct se_subsystem_dev *se_dev = p;
1777         struct se_device *dev;
1778         struct se_hba *hba = se_dev->se_dev_hba;
1779         struct se_subsystem_api *t = hba->transport;
1780         char *ptr;
1781
1782         ptr = strstr(page, "1");
1783         if (!ptr) {
1784                 pr_err("For dev_enable ops, only valid value"
1785                                 " is \"1\"\n");
1786                 return -EINVAL;
1787         }
1788         if (se_dev->se_dev_ptr) {
1789                 pr_err("se_dev->se_dev_ptr already set for storage"
1790                                 " object\n");
1791                 return -EEXIST;
1792         }
1793
1794         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1795                 return -EINVAL;
1796
1797         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1798         if (IS_ERR(dev))
1799                 return PTR_ERR(dev);
1800         else if (!dev)
1801                 return -EINVAL;
1802
1803         se_dev->se_dev_ptr = dev;
1804         pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1805                 " %p\n", se_dev->se_dev_ptr);
1806
1807         return count;
1808 }
1809
1810 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1811         .attr   = { .ca_owner = THIS_MODULE,
1812                     .ca_name = "enable",
1813                     .ca_mode = S_IWUSR },
1814         .show   = NULL,
1815         .store  = target_core_store_dev_enable,
1816 };
1817
1818 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1819 {
1820         struct se_device *dev;
1821         struct se_subsystem_dev *su_dev = p;
1822         struct config_item *lu_ci;
1823         struct t10_alua_lu_gp *lu_gp;
1824         struct t10_alua_lu_gp_member *lu_gp_mem;
1825         ssize_t len = 0;
1826
1827         dev = su_dev->se_dev_ptr;
1828         if (!dev)
1829                 return -ENODEV;
1830
1831         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1832                 return len;
1833
1834         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1835         if (!lu_gp_mem) {
1836                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1837                                 " pointer\n");
1838                 return -EINVAL;
1839         }
1840
1841         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1842         lu_gp = lu_gp_mem->lu_gp;
1843         if (lu_gp) {
1844                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1845                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1846                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1847         }
1848         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1849
1850         return len;
1851 }
1852
1853 static ssize_t target_core_store_alua_lu_gp(
1854         void *p,
1855         const char *page,
1856         size_t count)
1857 {
1858         struct se_device *dev;
1859         struct se_subsystem_dev *su_dev = p;
1860         struct se_hba *hba = su_dev->se_dev_hba;
1861         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1862         struct t10_alua_lu_gp_member *lu_gp_mem;
1863         unsigned char buf[LU_GROUP_NAME_BUF];
1864         int move = 0;
1865
1866         dev = su_dev->se_dev_ptr;
1867         if (!dev)
1868                 return -ENODEV;
1869
1870         if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1871                 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1872                         config_item_name(&hba->hba_group.cg_item),
1873                         config_item_name(&su_dev->se_dev_group.cg_item));
1874                 return -EINVAL;
1875         }
1876         if (count > LU_GROUP_NAME_BUF) {
1877                 pr_err("ALUA LU Group Alias too large!\n");
1878                 return -EINVAL;
1879         }
1880         memset(buf, 0, LU_GROUP_NAME_BUF);
1881         memcpy(buf, page, count);
1882         /*
1883          * Any ALUA logical unit alias besides "NULL" means we will be
1884          * making a new group association.
1885          */
1886         if (strcmp(strstrip(buf), "NULL")) {
1887                 /*
1888                  * core_alua_get_lu_gp_by_name() will increment reference to
1889                  * struct t10_alua_lu_gp.  This reference is released with
1890                  * core_alua_get_lu_gp_by_name below().
1891                  */
1892                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1893                 if (!lu_gp_new)
1894                         return -ENODEV;
1895         }
1896         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1897         if (!lu_gp_mem) {
1898                 if (lu_gp_new)
1899                         core_alua_put_lu_gp_from_name(lu_gp_new);
1900                 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1901                                 " pointer\n");
1902                 return -EINVAL;
1903         }
1904
1905         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1906         lu_gp = lu_gp_mem->lu_gp;
1907         if (lu_gp) {
1908                 /*
1909                  * Clearing an existing lu_gp association, and replacing
1910                  * with NULL
1911                  */
1912                 if (!lu_gp_new) {
1913                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1914                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1915                                 " %hu\n",
1916                                 config_item_name(&hba->hba_group.cg_item),
1917                                 config_item_name(&su_dev->se_dev_group.cg_item),
1918                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1919                                 lu_gp->lu_gp_id);
1920
1921                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1922                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1923
1924                         return count;
1925                 }
1926                 /*
1927                  * Removing existing association of lu_gp_mem with lu_gp
1928                  */
1929                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1930                 move = 1;
1931         }
1932         /*
1933          * Associate lu_gp_mem with lu_gp_new.
1934          */
1935         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1936         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1937
1938         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1939                 " core/alua/lu_gps/%s, ID: %hu\n",
1940                 (move) ? "Moving" : "Adding",
1941                 config_item_name(&hba->hba_group.cg_item),
1942                 config_item_name(&su_dev->se_dev_group.cg_item),
1943                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1944                 lu_gp_new->lu_gp_id);
1945
1946         core_alua_put_lu_gp_from_name(lu_gp_new);
1947         return count;
1948 }
1949
1950 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1951         .attr   = { .ca_owner = THIS_MODULE,
1952                     .ca_name = "alua_lu_gp",
1953                     .ca_mode = S_IRUGO | S_IWUSR },
1954         .show   = target_core_show_alua_lu_gp,
1955         .store  = target_core_store_alua_lu_gp,
1956 };
1957
1958 static struct configfs_attribute *lio_core_dev_attrs[] = {
1959         &target_core_attr_dev_info.attr,
1960         &target_core_attr_dev_control.attr,
1961         &target_core_attr_dev_alias.attr,
1962         &target_core_attr_dev_udev_path.attr,
1963         &target_core_attr_dev_enable.attr,
1964         &target_core_attr_dev_alua_lu_gp.attr,
1965         NULL,
1966 };
1967
1968 static void target_core_dev_release(struct config_item *item)
1969 {
1970         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1971                                 struct se_subsystem_dev, se_dev_group);
1972         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1973         struct se_subsystem_api *t = hba->transport;
1974         struct config_group *dev_cg = &se_dev->se_dev_group;
1975
1976         kfree(dev_cg->default_groups);
1977         /*
1978          * This pointer will set when the storage is enabled with:
1979          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
1980          */
1981         if (se_dev->se_dev_ptr) {
1982                 pr_debug("Target_Core_ConfigFS: Calling se_free_"
1983                         "virtual_device() for se_dev_ptr: %p\n",
1984                         se_dev->se_dev_ptr);
1985
1986                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
1987         } else {
1988                 /*
1989                  * Release struct se_subsystem_dev->se_dev_su_ptr..
1990                  */
1991                 pr_debug("Target_Core_ConfigFS: Calling t->free_"
1992                         "device() for se_dev_su_ptr: %p\n",
1993                         se_dev->se_dev_su_ptr);
1994
1995                 t->free_device(se_dev->se_dev_su_ptr);
1996         }
1997
1998         pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
1999                         "_dev_t: %p\n", se_dev);
2000         kfree(se_dev);
2001 }
2002
2003 static ssize_t target_core_dev_show(struct config_item *item,
2004                                      struct configfs_attribute *attr,
2005                                      char *page)
2006 {
2007         struct se_subsystem_dev *se_dev = container_of(
2008                         to_config_group(item), struct se_subsystem_dev,
2009                         se_dev_group);
2010         struct target_core_configfs_attribute *tc_attr = container_of(
2011                         attr, struct target_core_configfs_attribute, attr);
2012
2013         if (!tc_attr->show)
2014                 return -EINVAL;
2015
2016         return tc_attr->show(se_dev, page);
2017 }
2018
2019 static ssize_t target_core_dev_store(struct config_item *item,
2020                                       struct configfs_attribute *attr,
2021                                       const char *page, size_t count)
2022 {
2023         struct se_subsystem_dev *se_dev = container_of(
2024                         to_config_group(item), struct se_subsystem_dev,
2025                         se_dev_group);
2026         struct target_core_configfs_attribute *tc_attr = container_of(
2027                         attr, struct target_core_configfs_attribute, attr);
2028
2029         if (!tc_attr->store)
2030                 return -EINVAL;
2031
2032         return tc_attr->store(se_dev, page, count);
2033 }
2034
2035 static struct configfs_item_operations target_core_dev_item_ops = {
2036         .release                = target_core_dev_release,
2037         .show_attribute         = target_core_dev_show,
2038         .store_attribute        = target_core_dev_store,
2039 };
2040
2041 static struct config_item_type target_core_dev_cit = {
2042         .ct_item_ops            = &target_core_dev_item_ops,
2043         .ct_attrs               = lio_core_dev_attrs,
2044         .ct_owner               = THIS_MODULE,
2045 };
2046
2047 /* End functions for struct config_item_type target_core_dev_cit */
2048
2049 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2050
2051 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2052 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2053 static struct target_core_alua_lu_gp_attribute                          \
2054                         target_core_alua_lu_gp_##_name =                \
2055         __CONFIGFS_EATTR(_name, _mode,                                  \
2056         target_core_alua_lu_gp_show_attr_##_name,                       \
2057         target_core_alua_lu_gp_store_attr_##_name);
2058
2059 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2060 static struct target_core_alua_lu_gp_attribute                          \
2061                         target_core_alua_lu_gp_##_name =                \
2062         __CONFIGFS_EATTR_RO(_name,                                      \
2063         target_core_alua_lu_gp_show_attr_##_name);
2064
2065 /*
2066  * lu_gp_id
2067  */
2068 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2069         struct t10_alua_lu_gp *lu_gp,
2070         char *page)
2071 {
2072         if (!lu_gp->lu_gp_valid_id)
2073                 return 0;
2074
2075         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2076 }
2077
2078 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2079         struct t10_alua_lu_gp *lu_gp,
2080         const char *page,
2081         size_t count)
2082 {
2083         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2084         unsigned long lu_gp_id;
2085         int ret;
2086
2087         ret = strict_strtoul(page, 0, &lu_gp_id);
2088         if (ret < 0) {
2089                 pr_err("strict_strtoul() returned %d for"
2090                         " lu_gp_id\n", ret);
2091                 return -EINVAL;
2092         }
2093         if (lu_gp_id > 0x0000ffff) {
2094                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2095                         " 0x0000ffff\n", lu_gp_id);
2096                 return -EINVAL;
2097         }
2098
2099         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2100         if (ret < 0)
2101                 return -EINVAL;
2102
2103         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2104                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2105                 config_item_name(&alua_lu_gp_cg->cg_item),
2106                 lu_gp->lu_gp_id);
2107
2108         return count;
2109 }
2110
2111 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2112
2113 /*
2114  * members
2115  */
2116 static ssize_t target_core_alua_lu_gp_show_attr_members(
2117         struct t10_alua_lu_gp *lu_gp,
2118         char *page)
2119 {
2120         struct se_device *dev;
2121         struct se_hba *hba;
2122         struct se_subsystem_dev *su_dev;
2123         struct t10_alua_lu_gp_member *lu_gp_mem;
2124         ssize_t len = 0, cur_len;
2125         unsigned char buf[LU_GROUP_NAME_BUF];
2126
2127         memset(buf, 0, LU_GROUP_NAME_BUF);
2128
2129         spin_lock(&lu_gp->lu_gp_lock);
2130         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2131                 dev = lu_gp_mem->lu_gp_mem_dev;
2132                 su_dev = dev->se_sub_dev;
2133                 hba = su_dev->se_dev_hba;
2134
2135                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2136                         config_item_name(&hba->hba_group.cg_item),
2137                         config_item_name(&su_dev->se_dev_group.cg_item));
2138                 cur_len++; /* Extra byte for NULL terminator */
2139
2140                 if ((cur_len + len) > PAGE_SIZE) {
2141                         pr_warn("Ran out of lu_gp_show_attr"
2142                                 "_members buffer\n");
2143                         break;
2144                 }
2145                 memcpy(page+len, buf, cur_len);
2146                 len += cur_len;
2147         }
2148         spin_unlock(&lu_gp->lu_gp_lock);
2149
2150         return len;
2151 }
2152
2153 SE_DEV_ALUA_LU_ATTR_RO(members);
2154
2155 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2156
2157 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2158         &target_core_alua_lu_gp_lu_gp_id.attr,
2159         &target_core_alua_lu_gp_members.attr,
2160         NULL,
2161 };
2162
2163 static void target_core_alua_lu_gp_release(struct config_item *item)
2164 {
2165         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2166                         struct t10_alua_lu_gp, lu_gp_group);
2167
2168         core_alua_free_lu_gp(lu_gp);
2169 }
2170
2171 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2172         .release                = target_core_alua_lu_gp_release,
2173         .show_attribute         = target_core_alua_lu_gp_attr_show,
2174         .store_attribute        = target_core_alua_lu_gp_attr_store,
2175 };
2176
2177 static struct config_item_type target_core_alua_lu_gp_cit = {
2178         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2179         .ct_attrs               = target_core_alua_lu_gp_attrs,
2180         .ct_owner               = THIS_MODULE,
2181 };
2182
2183 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2184
2185 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2186
2187 static struct config_group *target_core_alua_create_lu_gp(
2188         struct config_group *group,
2189         const char *name)
2190 {
2191         struct t10_alua_lu_gp *lu_gp;
2192         struct config_group *alua_lu_gp_cg = NULL;
2193         struct config_item *alua_lu_gp_ci = NULL;
2194
2195         lu_gp = core_alua_allocate_lu_gp(name, 0);
2196         if (IS_ERR(lu_gp))
2197                 return NULL;
2198
2199         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2200         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2201
2202         config_group_init_type_name(alua_lu_gp_cg, name,
2203                         &target_core_alua_lu_gp_cit);
2204
2205         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2206                 " Group: core/alua/lu_gps/%s\n",
2207                 config_item_name(alua_lu_gp_ci));
2208
2209         return alua_lu_gp_cg;
2210
2211 }
2212
2213 static void target_core_alua_drop_lu_gp(
2214         struct config_group *group,
2215         struct config_item *item)
2216 {
2217         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2218                         struct t10_alua_lu_gp, lu_gp_group);
2219
2220         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2221                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2222                 config_item_name(item), lu_gp->lu_gp_id);
2223         /*
2224          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2225          * -> target_core_alua_lu_gp_release()
2226          */
2227         config_item_put(item);
2228 }
2229
2230 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2231         .make_group             = &target_core_alua_create_lu_gp,
2232         .drop_item              = &target_core_alua_drop_lu_gp,
2233 };
2234
2235 static struct config_item_type target_core_alua_lu_gps_cit = {
2236         .ct_item_ops            = NULL,
2237         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2238         .ct_owner               = THIS_MODULE,
2239 };
2240
2241 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2242
2243 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2244
2245 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2246 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2247 static struct target_core_alua_tg_pt_gp_attribute                       \
2248                         target_core_alua_tg_pt_gp_##_name =             \
2249         __CONFIGFS_EATTR(_name, _mode,                                  \
2250         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2251         target_core_alua_tg_pt_gp_store_attr_##_name);
2252
2253 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2254 static struct target_core_alua_tg_pt_gp_attribute                       \
2255                         target_core_alua_tg_pt_gp_##_name =             \
2256         __CONFIGFS_EATTR_RO(_name,                                      \
2257         target_core_alua_tg_pt_gp_show_attr_##_name);
2258
2259 /*
2260  * alua_access_state
2261  */
2262 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2263         struct t10_alua_tg_pt_gp *tg_pt_gp,
2264         char *page)
2265 {
2266         return sprintf(page, "%d\n",
2267                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2268 }
2269
2270 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2271         struct t10_alua_tg_pt_gp *tg_pt_gp,
2272         const char *page,
2273         size_t count)
2274 {
2275         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2276         unsigned long tmp;
2277         int new_state, ret;
2278
2279         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2280                 pr_err("Unable to do implict ALUA on non valid"
2281                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2282                 return -EINVAL;
2283         }
2284
2285         ret = strict_strtoul(page, 0, &tmp);
2286         if (ret < 0) {
2287                 pr_err("Unable to extract new ALUA access state from"
2288                                 " %s\n", page);
2289                 return -EINVAL;
2290         }
2291         new_state = (int)tmp;
2292
2293         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2294                 pr_err("Unable to process implict configfs ALUA"
2295                         " transition while TPGS_IMPLICT_ALUA is disabled\n");
2296                 return -EINVAL;
2297         }
2298
2299         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2300                                         NULL, NULL, new_state, 0);
2301         return (!ret) ? count : -EINVAL;
2302 }
2303
2304 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2305
2306 /*
2307  * alua_access_status
2308  */
2309 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2310         struct t10_alua_tg_pt_gp *tg_pt_gp,
2311         char *page)
2312 {
2313         return sprintf(page, "%s\n",
2314                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2315 }
2316
2317 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2318         struct t10_alua_tg_pt_gp *tg_pt_gp,
2319         const char *page,
2320         size_t count)
2321 {
2322         unsigned long tmp;
2323         int new_status, ret;
2324
2325         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2326                 pr_err("Unable to do set ALUA access status on non"
2327                         " valid tg_pt_gp ID: %hu\n",
2328                         tg_pt_gp->tg_pt_gp_valid_id);
2329                 return -EINVAL;
2330         }
2331
2332         ret = strict_strtoul(page, 0, &tmp);
2333         if (ret < 0) {
2334                 pr_err("Unable to extract new ALUA access status"
2335                                 " from %s\n", page);
2336                 return -EINVAL;
2337         }
2338         new_status = (int)tmp;
2339
2340         if ((new_status != ALUA_STATUS_NONE) &&
2341             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2342             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2343                 pr_err("Illegal ALUA access status: 0x%02x\n",
2344                                 new_status);
2345                 return -EINVAL;
2346         }
2347
2348         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2349         return count;
2350 }
2351
2352 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2353
2354 /*
2355  * alua_access_type
2356  */
2357 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2358         struct t10_alua_tg_pt_gp *tg_pt_gp,
2359         char *page)
2360 {
2361         return core_alua_show_access_type(tg_pt_gp, page);
2362 }
2363
2364 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2365         struct t10_alua_tg_pt_gp *tg_pt_gp,
2366         const char *page,
2367         size_t count)
2368 {
2369         return core_alua_store_access_type(tg_pt_gp, page, count);
2370 }
2371
2372 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2373
2374 /*
2375  * alua_write_metadata
2376  */
2377 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2378         struct t10_alua_tg_pt_gp *tg_pt_gp,
2379         char *page)
2380 {
2381         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2382 }
2383
2384 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2385         struct t10_alua_tg_pt_gp *tg_pt_gp,
2386         const char *page,
2387         size_t count)
2388 {
2389         unsigned long tmp;
2390         int ret;
2391
2392         ret = strict_strtoul(page, 0, &tmp);
2393         if (ret < 0) {
2394                 pr_err("Unable to extract alua_write_metadata\n");
2395                 return -EINVAL;
2396         }
2397
2398         if ((tmp != 0) && (tmp != 1)) {
2399                 pr_err("Illegal value for alua_write_metadata:"
2400                         " %lu\n", tmp);
2401                 return -EINVAL;
2402         }
2403         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2404
2405         return count;
2406 }
2407
2408 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2409
2410
2411
2412 /*
2413  * nonop_delay_msecs
2414  */
2415 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2416         struct t10_alua_tg_pt_gp *tg_pt_gp,
2417         char *page)
2418 {
2419         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2420
2421 }
2422
2423 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2424         struct t10_alua_tg_pt_gp *tg_pt_gp,
2425         const char *page,
2426         size_t count)
2427 {
2428         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2429 }
2430
2431 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2432
2433 /*
2434  * trans_delay_msecs
2435  */
2436 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2437         struct t10_alua_tg_pt_gp *tg_pt_gp,
2438         char *page)
2439 {
2440         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2441 }
2442
2443 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2444         struct t10_alua_tg_pt_gp *tg_pt_gp,
2445         const char *page,
2446         size_t count)
2447 {
2448         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2449 }
2450
2451 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2452
2453 /*
2454  * preferred
2455  */
2456
2457 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2458         struct t10_alua_tg_pt_gp *tg_pt_gp,
2459         char *page)
2460 {
2461         return core_alua_show_preferred_bit(tg_pt_gp, page);
2462 }
2463
2464 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2465         struct t10_alua_tg_pt_gp *tg_pt_gp,
2466         const char *page,
2467         size_t count)
2468 {
2469         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2470 }
2471
2472 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2473
2474 /*
2475  * tg_pt_gp_id
2476  */
2477 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2478         struct t10_alua_tg_pt_gp *tg_pt_gp,
2479         char *page)
2480 {
2481         if (!tg_pt_gp->tg_pt_gp_valid_id)
2482                 return 0;
2483
2484         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2485 }
2486
2487 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2488         struct t10_alua_tg_pt_gp *tg_pt_gp,
2489         const char *page,
2490         size_t count)
2491 {
2492         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2493         unsigned long tg_pt_gp_id;
2494         int ret;
2495
2496         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2497         if (ret < 0) {
2498                 pr_err("strict_strtoul() returned %d for"
2499                         " tg_pt_gp_id\n", ret);
2500                 return -EINVAL;
2501         }
2502         if (tg_pt_gp_id > 0x0000ffff) {
2503                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2504                         " 0x0000ffff\n", tg_pt_gp_id);
2505                 return -EINVAL;
2506         }
2507
2508         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2509         if (ret < 0)
2510                 return -EINVAL;
2511
2512         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2513                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2514                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2515                 tg_pt_gp->tg_pt_gp_id);
2516
2517         return count;
2518 }
2519
2520 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2521
2522 /*
2523  * members
2524  */
2525 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2526         struct t10_alua_tg_pt_gp *tg_pt_gp,
2527         char *page)
2528 {
2529         struct se_port *port;
2530         struct se_portal_group *tpg;
2531         struct se_lun *lun;
2532         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2533         ssize_t len = 0, cur_len;
2534         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2535
2536         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2537
2538         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2539         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2540                         tg_pt_gp_mem_list) {
2541                 port = tg_pt_gp_mem->tg_pt;
2542                 tpg = port->sep_tpg;
2543                 lun = port->sep_lun;
2544
2545                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2546                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2547                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2548                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2549                         config_item_name(&lun->lun_group.cg_item));
2550                 cur_len++; /* Extra byte for NULL terminator */
2551
2552                 if ((cur_len + len) > PAGE_SIZE) {
2553                         pr_warn("Ran out of lu_gp_show_attr"
2554                                 "_members buffer\n");
2555                         break;
2556                 }
2557                 memcpy(page+len, buf, cur_len);
2558                 len += cur_len;
2559         }
2560         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2561
2562         return len;
2563 }
2564
2565 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2566
2567 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2568                         tg_pt_gp_group);
2569
2570 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2571         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2572         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2573         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2574         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2575         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2576         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2577         &target_core_alua_tg_pt_gp_preferred.attr,
2578         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2579         &target_core_alua_tg_pt_gp_members.attr,
2580         NULL,
2581 };
2582
2583 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2584 {
2585         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2586                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2587
2588         core_alua_free_tg_pt_gp(tg_pt_gp);
2589 }
2590
2591 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2592         .release                = target_core_alua_tg_pt_gp_release,
2593         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2594         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2595 };
2596
2597 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2598         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2599         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2600         .ct_owner               = THIS_MODULE,
2601 };
2602
2603 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2604
2605 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2606
2607 static struct config_group *target_core_alua_create_tg_pt_gp(
2608         struct config_group *group,
2609         const char *name)
2610 {
2611         struct t10_alua *alua = container_of(group, struct t10_alua,
2612                                         alua_tg_pt_gps_group);
2613         struct t10_alua_tg_pt_gp *tg_pt_gp;
2614         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2615         struct config_group *alua_tg_pt_gp_cg = NULL;
2616         struct config_item *alua_tg_pt_gp_ci = NULL;
2617
2618         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2619         if (!tg_pt_gp)
2620                 return NULL;
2621
2622         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2623         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2624
2625         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2626                         &target_core_alua_tg_pt_gp_cit);
2627
2628         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2629                 " Group: alua/tg_pt_gps/%s\n",
2630                 config_item_name(alua_tg_pt_gp_ci));
2631
2632         return alua_tg_pt_gp_cg;
2633 }
2634
2635 static void target_core_alua_drop_tg_pt_gp(
2636         struct config_group *group,
2637         struct config_item *item)
2638 {
2639         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2640                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2641
2642         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2643                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2644                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2645         /*
2646          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2647          * -> target_core_alua_tg_pt_gp_release().
2648          */
2649         config_item_put(item);
2650 }
2651
2652 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2653         .make_group             = &target_core_alua_create_tg_pt_gp,
2654         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2655 };
2656
2657 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2658         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2659         .ct_owner               = THIS_MODULE,
2660 };
2661
2662 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2663
2664 /* Start functions for struct config_item_type target_core_alua_cit */
2665
2666 /*
2667  * target_core_alua_cit is a ConfigFS group that lives under
2668  * /sys/kernel/config/target/core/alua.  There are default groups
2669  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2670  * target_core_alua_cit in target_core_init_configfs() below.
2671  */
2672 static struct config_item_type target_core_alua_cit = {
2673         .ct_item_ops            = NULL,
2674         .ct_attrs               = NULL,
2675         .ct_owner               = THIS_MODULE,
2676 };
2677
2678 /* End functions for struct config_item_type target_core_alua_cit */
2679
2680 /* Start functions for struct config_item_type target_core_stat_cit */
2681
2682 static struct config_group *target_core_stat_mkdir(
2683         struct config_group *group,
2684         const char *name)
2685 {
2686         return ERR_PTR(-ENOSYS);
2687 }
2688
2689 static void target_core_stat_rmdir(
2690         struct config_group *group,
2691         struct config_item *item)
2692 {
2693         return;
2694 }
2695
2696 static struct configfs_group_operations target_core_stat_group_ops = {
2697         .make_group             = &target_core_stat_mkdir,
2698         .drop_item              = &target_core_stat_rmdir,
2699 };
2700
2701 static struct config_item_type target_core_stat_cit = {
2702         .ct_group_ops           = &target_core_stat_group_ops,
2703         .ct_owner               = THIS_MODULE,
2704 };
2705
2706 /* End functions for struct config_item_type target_core_stat_cit */
2707
2708 /* Start functions for struct config_item_type target_core_hba_cit */
2709
2710 static struct config_group *target_core_make_subdev(
2711         struct config_group *group,
2712         const char *name)
2713 {
2714         struct t10_alua_tg_pt_gp *tg_pt_gp;
2715         struct se_subsystem_dev *se_dev;
2716         struct se_subsystem_api *t;
2717         struct config_item *hba_ci = &group->cg_item;
2718         struct se_hba *hba = item_to_hba(hba_ci);
2719         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2720         struct config_group *dev_stat_grp = NULL;
2721         int errno = -ENOMEM, ret;
2722
2723         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2724         if (ret)
2725                 return ERR_PTR(ret);
2726         /*
2727          * Locate the struct se_subsystem_api from parent's struct se_hba.
2728          */
2729         t = hba->transport;
2730
2731         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2732         if (!se_dev) {
2733                 pr_err("Unable to allocate memory for"
2734                                 " struct se_subsystem_dev\n");
2735                 goto unlock;
2736         }
2737         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2738         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2739         INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2740         INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2741         spin_lock_init(&se_dev->t10_pr.registration_lock);
2742         spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2743         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2744         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2745         spin_lock_init(&se_dev->se_dev_lock);
2746         se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2747         se_dev->t10_wwn.t10_sub_dev = se_dev;
2748         se_dev->t10_alua.t10_sub_dev = se_dev;
2749         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2750
2751         se_dev->se_dev_hba = hba;
2752         dev_cg = &se_dev->se_dev_group;
2753
2754         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2755                         GFP_KERNEL);
2756         if (!dev_cg->default_groups)
2757                 goto out;
2758         /*
2759          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2760          * for ->allocate_virtdevice()
2761          *
2762          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2763          * has been called successfully in the next level up in the
2764          * configfs tree for device object's struct config_group.
2765          */
2766         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2767         if (!se_dev->se_dev_su_ptr) {
2768                 pr_err("Unable to locate subsystem dependent pointer"
2769                         " from allocate_virtdevice()\n");
2770                 goto out;
2771         }
2772
2773         config_group_init_type_name(&se_dev->se_dev_group, name,
2774                         &target_core_dev_cit);
2775         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2776                         &target_core_dev_attrib_cit);
2777         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2778                         &target_core_dev_pr_cit);
2779         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2780                         &target_core_dev_wwn_cit);
2781         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2782                         "alua", &target_core_alua_tg_pt_gps_cit);
2783         config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2784                         "statistics", &target_core_stat_cit);
2785
2786         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2787         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2788         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2789         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2790         dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2791         dev_cg->default_groups[5] = NULL;
2792         /*
2793          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2794          */
2795         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2796         if (!tg_pt_gp)
2797                 goto out;
2798
2799         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2800         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2801                                 GFP_KERNEL);
2802         if (!tg_pt_gp_cg->default_groups) {
2803                 pr_err("Unable to allocate tg_pt_gp_cg->"
2804                                 "default_groups\n");
2805                 goto out;
2806         }
2807
2808         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2809                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2810         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2811         tg_pt_gp_cg->default_groups[1] = NULL;
2812         se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2813         /*
2814          * Add core/$HBA/$DEV/statistics/ default groups
2815          */
2816         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2817         dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2818                                 GFP_KERNEL);
2819         if (!dev_stat_grp->default_groups) {
2820                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2821                 goto out;
2822         }
2823         target_stat_setup_dev_default_groups(se_dev);
2824
2825         pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2826                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2827
2828         mutex_unlock(&hba->hba_access_mutex);
2829         return &se_dev->se_dev_group;
2830 out:
2831         if (se_dev->t10_alua.default_tg_pt_gp) {
2832                 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2833                 se_dev->t10_alua.default_tg_pt_gp = NULL;
2834         }
2835         if (dev_stat_grp)
2836                 kfree(dev_stat_grp->default_groups);
2837         if (tg_pt_gp_cg)
2838                 kfree(tg_pt_gp_cg->default_groups);
2839         if (dev_cg)
2840                 kfree(dev_cg->default_groups);
2841         if (se_dev->se_dev_su_ptr)
2842                 t->free_device(se_dev->se_dev_su_ptr);
2843         kfree(se_dev);
2844 unlock:
2845         mutex_unlock(&hba->hba_access_mutex);
2846         return ERR_PTR(errno);
2847 }
2848
2849 static void target_core_drop_subdev(
2850         struct config_group *group,
2851         struct config_item *item)
2852 {
2853         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2854                                 struct se_subsystem_dev, se_dev_group);
2855         struct se_hba *hba;
2856         struct config_item *df_item;
2857         struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2858         int i;
2859
2860         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2861
2862         mutex_lock(&hba->hba_access_mutex);
2863
2864         dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2865         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2866                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2867                 dev_stat_grp->default_groups[i] = NULL;
2868                 config_item_put(df_item);
2869         }
2870         kfree(dev_stat_grp->default_groups);
2871
2872         tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2873         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2874                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2875                 tg_pt_gp_cg->default_groups[i] = NULL;
2876                 config_item_put(df_item);
2877         }
2878         kfree(tg_pt_gp_cg->default_groups);
2879         /*
2880          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2881          * directly from target_core_alua_tg_pt_gp_release().
2882          */
2883         se_dev->t10_alua.default_tg_pt_gp = NULL;
2884
2885         dev_cg = &se_dev->se_dev_group;
2886         for (i = 0; dev_cg->default_groups[i]; i++) {
2887                 df_item = &dev_cg->default_groups[i]->cg_item;
2888                 dev_cg->default_groups[i] = NULL;
2889                 config_item_put(df_item);
2890         }
2891         /*
2892          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2893          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2894          */
2895         config_item_put(item);
2896         mutex_unlock(&hba->hba_access_mutex);
2897 }
2898
2899 static struct configfs_group_operations target_core_hba_group_ops = {
2900         .make_group             = target_core_make_subdev,
2901         .drop_item              = target_core_drop_subdev,
2902 };
2903
2904 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2905 #define SE_HBA_ATTR(_name, _mode)                               \
2906 static struct target_core_hba_attribute                         \
2907                 target_core_hba_##_name =                       \
2908                 __CONFIGFS_EATTR(_name, _mode,                  \
2909                 target_core_hba_show_attr_##_name,              \
2910                 target_core_hba_store_attr_##_name);
2911
2912 #define SE_HBA_ATTR_RO(_name)                                   \
2913 static struct target_core_hba_attribute                         \
2914                 target_core_hba_##_name =                       \
2915                 __CONFIGFS_EATTR_RO(_name,                      \
2916                 target_core_hba_show_attr_##_name);
2917
2918 static ssize_t target_core_hba_show_attr_hba_info(
2919         struct se_hba *hba,
2920         char *page)
2921 {
2922         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2923                         hba->hba_id, hba->transport->name,
2924                         TARGET_CORE_CONFIGFS_VERSION);
2925 }
2926
2927 SE_HBA_ATTR_RO(hba_info);
2928
2929 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2930                                 char *page)
2931 {
2932         int hba_mode = 0;
2933
2934         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2935                 hba_mode = 1;
2936
2937         return sprintf(page, "%d\n", hba_mode);
2938 }
2939
2940 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2941                                 const char *page, size_t count)
2942 {
2943         struct se_subsystem_api *transport = hba->transport;
2944         unsigned long mode_flag;
2945         int ret;
2946
2947         if (transport->pmode_enable_hba == NULL)
2948                 return -EINVAL;
2949
2950         ret = strict_strtoul(page, 0, &mode_flag);
2951         if (ret < 0) {
2952                 pr_err("Unable to extract hba mode flag: %d\n", ret);
2953                 return -EINVAL;
2954         }
2955
2956         spin_lock(&hba->device_lock);
2957         if (!list_empty(&hba->hba_dev_list)) {
2958                 pr_err("Unable to set hba_mode with active devices\n");
2959                 spin_unlock(&hba->device_lock);
2960                 return -EINVAL;
2961         }
2962         spin_unlock(&hba->device_lock);
2963
2964         ret = transport->pmode_enable_hba(hba, mode_flag);
2965         if (ret < 0)
2966                 return -EINVAL;
2967         if (ret > 0)
2968                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2969         else if (ret == 0)
2970                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2971
2972         return count;
2973 }
2974
2975 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
2976
2977 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
2978
2979 static void target_core_hba_release(struct config_item *item)
2980 {
2981         struct se_hba *hba = container_of(to_config_group(item),
2982                                 struct se_hba, hba_group);
2983         core_delete_hba(hba);
2984 }
2985
2986 static struct configfs_attribute *target_core_hba_attrs[] = {
2987         &target_core_hba_hba_info.attr,
2988         &target_core_hba_hba_mode.attr,
2989         NULL,
2990 };
2991
2992 static struct configfs_item_operations target_core_hba_item_ops = {
2993         .release                = target_core_hba_release,
2994         .show_attribute         = target_core_hba_attr_show,
2995         .store_attribute        = target_core_hba_attr_store,
2996 };
2997
2998 static struct config_item_type target_core_hba_cit = {
2999         .ct_item_ops            = &target_core_hba_item_ops,
3000         .ct_group_ops           = &target_core_hba_group_ops,
3001         .ct_attrs               = target_core_hba_attrs,
3002         .ct_owner               = THIS_MODULE,
3003 };
3004
3005 static struct config_group *target_core_call_addhbatotarget(
3006         struct config_group *group,
3007         const char *name)
3008 {
3009         char *se_plugin_str, *str, *str2;
3010         struct se_hba *hba;
3011         char buf[TARGET_CORE_NAME_MAX_LEN];
3012         unsigned long plugin_dep_id = 0;
3013         int ret;
3014
3015         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3016         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3017                 pr_err("Passed *name strlen(): %d exceeds"
3018                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3019                         TARGET_CORE_NAME_MAX_LEN);
3020                 return ERR_PTR(-ENAMETOOLONG);
3021         }
3022         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3023
3024         str = strstr(buf, "_");
3025         if (!str) {
3026                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3027                 return ERR_PTR(-EINVAL);
3028         }
3029         se_plugin_str = buf;
3030         /*
3031          * Special case for subsystem plugins that have "_" in their names.
3032          * Namely rd_direct and rd_mcp..
3033          */
3034         str2 = strstr(str+1, "_");
3035         if (str2) {
3036                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3037                 str2++; /* Skip to start of plugin dependent ID */
3038                 str = str2;
3039         } else {
3040                 *str = '\0'; /* Terminate for *se_plugin_str */
3041                 str++; /* Skip to start of plugin dependent ID */
3042         }
3043
3044         ret = strict_strtoul(str, 0, &plugin_dep_id);
3045         if (ret < 0) {
3046                 pr_err("strict_strtoul() returned %d for"
3047                                 " plugin_dep_id\n", ret);
3048                 return ERR_PTR(-EINVAL);
3049         }
3050         /*
3051          * Load up TCM subsystem plugins if they have not already been loaded.
3052          */
3053         transport_subsystem_check_init();
3054
3055         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3056         if (IS_ERR(hba))
3057                 return ERR_CAST(hba);
3058
3059         config_group_init_type_name(&hba->hba_group, name,
3060                         &target_core_hba_cit);
3061
3062         return &hba->hba_group;
3063 }
3064
3065 static void target_core_call_delhbafromtarget(
3066         struct config_group *group,
3067         struct config_item *item)
3068 {
3069         /*
3070          * core_delete_hba() is called from target_core_hba_item_ops->release()
3071          * -> target_core_hba_release()
3072          */
3073         config_item_put(item);
3074 }
3075
3076 static struct configfs_group_operations target_core_group_ops = {
3077         .make_group     = target_core_call_addhbatotarget,
3078         .drop_item      = target_core_call_delhbafromtarget,
3079 };
3080
3081 static struct config_item_type target_core_cit = {
3082         .ct_item_ops    = NULL,
3083         .ct_group_ops   = &target_core_group_ops,
3084         .ct_attrs       = NULL,
3085         .ct_owner       = THIS_MODULE,
3086 };
3087
3088 /* Stop functions for struct config_item_type target_core_hba_cit */
3089
3090 static int __init target_core_init_configfs(void)
3091 {
3092         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3093         struct config_group *lu_gp_cg = NULL;
3094         struct configfs_subsystem *subsys;
3095         struct t10_alua_lu_gp *lu_gp;
3096         int ret;
3097
3098         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3099                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3100                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3101
3102         subsys = target_core_subsystem[0];
3103         config_group_init(&subsys->su_group);
3104         mutex_init(&subsys->su_mutex);
3105
3106         ret = init_se_kmem_caches();
3107         if (ret < 0)
3108                 return ret;
3109         /*
3110          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3111          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3112          */
3113         target_cg = &subsys->su_group;
3114         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3115                                 GFP_KERNEL);
3116         if (!target_cg->default_groups) {
3117                 pr_err("Unable to allocate target_cg->default_groups\n");
3118                 goto out_global;
3119         }
3120
3121         config_group_init_type_name(&target_core_hbagroup,
3122                         "core", &target_core_cit);
3123         target_cg->default_groups[0] = &target_core_hbagroup;
3124         target_cg->default_groups[1] = NULL;
3125         /*
3126          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3127          */
3128         hba_cg = &target_core_hbagroup;
3129         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3130                                 GFP_KERNEL);
3131         if (!hba_cg->default_groups) {
3132                 pr_err("Unable to allocate hba_cg->default_groups\n");
3133                 goto out_global;
3134         }
3135         config_group_init_type_name(&alua_group,
3136                         "alua", &target_core_alua_cit);
3137         hba_cg->default_groups[0] = &alua_group;
3138         hba_cg->default_groups[1] = NULL;
3139         /*
3140          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3141          * groups under /sys/kernel/config/target/core/alua/
3142          */
3143         alua_cg = &alua_group;
3144         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3145                         GFP_KERNEL);
3146         if (!alua_cg->default_groups) {
3147                 pr_err("Unable to allocate alua_cg->default_groups\n");
3148                 goto out_global;
3149         }
3150
3151         config_group_init_type_name(&alua_lu_gps_group,
3152                         "lu_gps", &target_core_alua_lu_gps_cit);
3153         alua_cg->default_groups[0] = &alua_lu_gps_group;
3154         alua_cg->default_groups[1] = NULL;
3155         /*
3156          * Add core/alua/lu_gps/default_lu_gp
3157          */
3158         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3159         if (IS_ERR(lu_gp))
3160                 goto out_global;
3161
3162         lu_gp_cg = &alua_lu_gps_group;
3163         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3164                         GFP_KERNEL);
3165         if (!lu_gp_cg->default_groups) {
3166                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3167                 goto out_global;
3168         }
3169
3170         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3171                                 &target_core_alua_lu_gp_cit);
3172         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3173         lu_gp_cg->default_groups[1] = NULL;
3174         default_lu_gp = lu_gp;
3175         /*
3176          * Register the target_core_mod subsystem with configfs.
3177          */
3178         ret = configfs_register_subsystem(subsys);
3179         if (ret < 0) {
3180                 pr_err("Error %d while registering subsystem %s\n",
3181                         ret, subsys->su_group.cg_item.ci_namebuf);
3182                 goto out_global;
3183         }
3184         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3185                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3186                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3187         /*
3188          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3189          */
3190         ret = rd_module_init();
3191         if (ret < 0)
3192                 goto out;
3193
3194         if (core_dev_setup_virtual_lun0() < 0)
3195                 goto out;
3196
3197         return 0;
3198
3199 out:
3200         configfs_unregister_subsystem(subsys);
3201         core_dev_release_virtual_lun0();
3202         rd_module_exit();
3203 out_global:
3204         if (default_lu_gp) {
3205                 core_alua_free_lu_gp(default_lu_gp);
3206                 default_lu_gp = NULL;
3207         }
3208         if (lu_gp_cg)
3209                 kfree(lu_gp_cg->default_groups);
3210         if (alua_cg)
3211                 kfree(alua_cg->default_groups);
3212         if (hba_cg)
3213                 kfree(hba_cg->default_groups);
3214         kfree(target_cg->default_groups);
3215         release_se_kmem_caches();
3216         return ret;
3217 }
3218
3219 static void __exit target_core_exit_configfs(void)
3220 {
3221         struct configfs_subsystem *subsys;
3222         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3223         struct config_item *item;
3224         int i;
3225
3226         subsys = target_core_subsystem[0];
3227
3228         lu_gp_cg = &alua_lu_gps_group;
3229         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3230                 item = &lu_gp_cg->default_groups[i]->cg_item;
3231                 lu_gp_cg->default_groups[i] = NULL;
3232                 config_item_put(item);
3233         }
3234         kfree(lu_gp_cg->default_groups);
3235         lu_gp_cg->default_groups = NULL;
3236
3237         alua_cg = &alua_group;
3238         for (i = 0; alua_cg->default_groups[i]; i++) {
3239                 item = &alua_cg->default_groups[i]->cg_item;
3240                 alua_cg->default_groups[i] = NULL;
3241                 config_item_put(item);
3242         }
3243         kfree(alua_cg->default_groups);
3244         alua_cg->default_groups = NULL;
3245
3246         hba_cg = &target_core_hbagroup;
3247         for (i = 0; hba_cg->default_groups[i]; i++) {
3248                 item = &hba_cg->default_groups[i]->cg_item;
3249                 hba_cg->default_groups[i] = NULL;
3250                 config_item_put(item);
3251         }
3252         kfree(hba_cg->default_groups);
3253         hba_cg->default_groups = NULL;
3254         /*
3255          * We expect subsys->su_group.default_groups to be released
3256          * by configfs subsystem provider logic..
3257          */
3258         configfs_unregister_subsystem(subsys);
3259         kfree(subsys->su_group.default_groups);
3260
3261         core_alua_free_lu_gp(default_lu_gp);
3262         default_lu_gp = NULL;
3263
3264         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3265                         " Infrastructure\n");
3266
3267         core_dev_release_virtual_lun0();
3268         rd_module_exit();
3269         release_se_kmem_caches();
3270 }
3271
3272 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3273 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3274 MODULE_LICENSE("GPL");
3275
3276 module_init(target_core_init_configfs);
3277 module_exit(target_core_exit_configfs);