[SCSI] tcm_fc: Fixing reference counting problem which was causing ft_sess to be...
[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 <linux/version.h>
27 #include <generated/utsrelease.h>
28 #include <linux/utsname.h>
29 #include <linux/init.h>
30 #include <linux/fs.h>
31 #include <linux/namei.h>
32 #include <linux/slab.h>
33 #include <linux/types.h>
34 #include <linux/delay.h>
35 #include <linux/unistd.h>
36 #include <linux/string.h>
37 #include <linux/parser.h>
38 #include <linux/syscalls.h>
39 #include <linux/configfs.h>
40
41 #include <target/target_core_base.h>
42 #include <target/target_core_device.h>
43 #include <target/target_core_transport.h>
44 #include <target/target_core_fabric_ops.h>
45 #include <target/target_core_fabric_configfs.h>
46 #include <target/target_core_configfs.h>
47 #include <target/configfs_macros.h>
48
49 #include "target_core_alua.h"
50 #include "target_core_hba.h"
51 #include "target_core_pr.h"
52 #include "target_core_rd.h"
53 #include "target_core_stat.h"
54
55 static struct list_head g_tf_list;
56 static struct 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 inline struct se_hba *
65 item_to_hba(struct config_item *item)
66 {
67         return container_of(to_config_group(item), struct se_hba, hba_group);
68 }
69
70 /*
71  * Attributes for /sys/kernel/config/target/
72  */
73 static ssize_t target_core_attr_show(struct config_item *item,
74                                       struct configfs_attribute *attr,
75                                       char *page)
76 {
77         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
78                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
79                 utsname()->sysname, utsname()->machine);
80 }
81
82 static struct configfs_item_operations target_core_fabric_item_ops = {
83         .show_attribute = target_core_attr_show,
84 };
85
86 static struct configfs_attribute target_core_item_attr_version = {
87         .ca_owner       = THIS_MODULE,
88         .ca_name        = "version",
89         .ca_mode        = S_IRUGO,
90 };
91
92 static struct target_fabric_configfs *target_core_get_fabric(
93         const char *name)
94 {
95         struct target_fabric_configfs *tf;
96
97         if (!(name))
98                 return NULL;
99
100         mutex_lock(&g_tf_lock);
101         list_for_each_entry(tf, &g_tf_list, tf_list) {
102                 if (!(strcmp(tf->tf_name, name))) {
103                         atomic_inc(&tf->tf_access_cnt);
104                         mutex_unlock(&g_tf_lock);
105                         return tf;
106                 }
107         }
108         mutex_unlock(&g_tf_lock);
109
110         return NULL;
111 }
112
113 /*
114  * Called from struct target_core_group_ops->make_group()
115  */
116 static struct config_group *target_core_register_fabric(
117         struct config_group *group,
118         const char *name)
119 {
120         struct target_fabric_configfs *tf;
121         int ret;
122
123         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
124                         " %s\n", group, name);
125         /*
126          * Ensure that TCM subsystem plugins are loaded at this point for
127          * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
128          * LUN symlinks.
129          */
130         if (transport_subsystem_check_init() < 0)
131                 return ERR_PTR(-EINVAL);
132
133         /*
134          * Below are some hardcoded request_module() calls to automatically
135          * local fabric modules when the following is called:
136          *
137          * mkdir -p /sys/kernel/config/target/$MODULE_NAME
138          *
139          * Note that this does not limit which TCM fabric module can be
140          * registered, but simply provids auto loading logic for modules with
141          * mkdir(2) system calls with known TCM fabric modules.
142          */
143         if (!(strncmp(name, "iscsi", 5))) {
144                 /*
145                  * Automatically load the LIO Target fabric module when the
146                  * following is called:
147                  *
148                  * mkdir -p $CONFIGFS/target/iscsi
149                  */
150                 ret = request_module("iscsi_target_mod");
151                 if (ret < 0) {
152                         printk(KERN_ERR "request_module() failed for"
153                                 " iscsi_target_mod.ko: %d\n", ret);
154                         return ERR_PTR(-EINVAL);
155                 }
156         } else if (!(strncmp(name, "loopback", 8))) {
157                 /*
158                  * Automatically load the tcm_loop fabric module when the
159                  * following is called:
160                  *
161                  * mkdir -p $CONFIGFS/target/loopback
162                  */
163                 ret = request_module("tcm_loop");
164                 if (ret < 0) {
165                         printk(KERN_ERR "request_module() failed for"
166                                 " tcm_loop.ko: %d\n", ret);
167                         return ERR_PTR(-EINVAL);
168                 }
169         }
170
171         tf = target_core_get_fabric(name);
172         if (!(tf)) {
173                 printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
174                         name);
175                 return ERR_PTR(-EINVAL);
176         }
177         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Located fabric:"
178                         " %s\n", tf->tf_name);
179         /*
180          * On a successful target_core_get_fabric() look, the returned
181          * struct target_fabric_configfs *tf will contain a usage reference.
182          */
183         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
184                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
185
186         tf->tf_group.default_groups = tf->tf_default_groups;
187         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
188         tf->tf_group.default_groups[1] = NULL;
189
190         config_group_init_type_name(&tf->tf_group, name,
191                         &TF_CIT_TMPL(tf)->tfc_wwn_cit);
192         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
193                         &TF_CIT_TMPL(tf)->tfc_discovery_cit);
194
195         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
196                         " %s\n", tf->tf_group.cg_item.ci_name);
197         /*
198          * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
199          */
200         tf->tf_ops.tf_subsys = tf->tf_subsys;
201         tf->tf_fabric = &tf->tf_group.cg_item;
202         printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
203                         " for %s\n", name);
204
205         return &tf->tf_group;
206 }
207
208 /*
209  * Called from struct target_core_group_ops->drop_item()
210  */
211 static void target_core_deregister_fabric(
212         struct config_group *group,
213         struct config_item *item)
214 {
215         struct target_fabric_configfs *tf = container_of(
216                 to_config_group(item), struct target_fabric_configfs, tf_group);
217         struct config_group *tf_group;
218         struct config_item *df_item;
219         int i;
220
221         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
222                 " tf list\n", config_item_name(item));
223
224         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
225                         " %s\n", tf->tf_name);
226         atomic_dec(&tf->tf_access_cnt);
227
228         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
229                         " tf->tf_fabric for %s\n", tf->tf_name);
230         tf->tf_fabric = NULL;
231
232         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
233                         " %s\n", config_item_name(item));
234
235         tf_group = &tf->tf_group;
236         for (i = 0; tf_group->default_groups[i]; i++) {
237                 df_item = &tf_group->default_groups[i]->cg_item;
238                 tf_group->default_groups[i] = NULL;
239                 config_item_put(df_item);
240         }
241         config_item_put(item);
242 }
243
244 static struct configfs_group_operations target_core_fabric_group_ops = {
245         .make_group     = &target_core_register_fabric,
246         .drop_item      = &target_core_deregister_fabric,
247 };
248
249 /*
250  * All item attributes appearing in /sys/kernel/target/ appear here.
251  */
252 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
253         &target_core_item_attr_version,
254         NULL,
255 };
256
257 /*
258  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
259  */
260 static struct config_item_type target_core_fabrics_item = {
261         .ct_item_ops    = &target_core_fabric_item_ops,
262         .ct_group_ops   = &target_core_fabric_group_ops,
263         .ct_attrs       = target_core_fabric_item_attrs,
264         .ct_owner       = THIS_MODULE,
265 };
266
267 static struct configfs_subsystem target_core_fabrics = {
268         .su_group = {
269                 .cg_item = {
270                         .ci_namebuf = "target",
271                         .ci_type = &target_core_fabrics_item,
272                 },
273         },
274 };
275
276 static struct configfs_subsystem *target_core_subsystem[] = {
277         &target_core_fabrics,
278         NULL,
279 };
280
281 /*##############################################################################
282 // Start functions called by external Target Fabrics Modules
283 //############################################################################*/
284
285 /*
286  * First function called by fabric modules to:
287  *
288  * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
289  * 2) Add struct target_fabric_configfs to g_tf_list
290  * 3) Return struct target_fabric_configfs to fabric module to be passed
291  *    into target_fabric_configfs_register().
292  */
293 struct target_fabric_configfs *target_fabric_configfs_init(
294         struct module *fabric_mod,
295         const char *name)
296 {
297         struct target_fabric_configfs *tf;
298
299         if (!(fabric_mod)) {
300                 printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
301                 return NULL;
302         }
303         if (!(name)) {
304                 printk(KERN_ERR "Unable to locate passed fabric name\n");
305                 return NULL;
306         }
307         if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
308                 printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
309                         "_NAME_SIZE\n", name);
310                 return NULL;
311         }
312
313         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
314         if (!(tf))
315                 return NULL;
316
317         INIT_LIST_HEAD(&tf->tf_list);
318         atomic_set(&tf->tf_access_cnt, 0);
319         /*
320          * Setup the default generic struct config_item_type's (cits) in
321          * struct target_fabric_configfs->tf_cit_tmpl
322          */
323         tf->tf_module = fabric_mod;
324         target_fabric_setup_cits(tf);
325
326         tf->tf_subsys = target_core_subsystem[0];
327         snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
328
329         mutex_lock(&g_tf_lock);
330         list_add_tail(&tf->tf_list, &g_tf_list);
331         mutex_unlock(&g_tf_lock);
332
333         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
334                         ">>>>>>>>>>>>>>\n");
335         printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
336                         " %s\n", tf, tf->tf_name);
337         return tf;
338 }
339 EXPORT_SYMBOL(target_fabric_configfs_init);
340
341 /*
342  * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
343  */
344 void target_fabric_configfs_free(
345         struct target_fabric_configfs *tf)
346 {
347         mutex_lock(&g_tf_lock);
348         list_del(&tf->tf_list);
349         mutex_unlock(&g_tf_lock);
350
351         kfree(tf);
352 }
353 EXPORT_SYMBOL(target_fabric_configfs_free);
354
355 /*
356  * Perform a sanity check of the passed tf->tf_ops before completing
357  * TCM fabric module registration.
358  */
359 static int target_fabric_tf_ops_check(
360         struct target_fabric_configfs *tf)
361 {
362         struct target_core_fabric_ops *tfo = &tf->tf_ops;
363
364         if (!(tfo->get_fabric_name)) {
365                 printk(KERN_ERR "Missing tfo->get_fabric_name()\n");
366                 return -EINVAL;
367         }
368         if (!(tfo->get_fabric_proto_ident)) {
369                 printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n");
370                 return -EINVAL;
371         }
372         if (!(tfo->tpg_get_wwn)) {
373                 printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n");
374                 return -EINVAL;
375         }
376         if (!(tfo->tpg_get_tag)) {
377                 printk(KERN_ERR "Missing tfo->tpg_get_tag()\n");
378                 return -EINVAL;
379         }
380         if (!(tfo->tpg_get_default_depth)) {
381                 printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n");
382                 return -EINVAL;
383         }
384         if (!(tfo->tpg_get_pr_transport_id)) {
385                 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n");
386                 return -EINVAL;
387         }
388         if (!(tfo->tpg_get_pr_transport_id_len)) {
389                 printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n");
390                 return -EINVAL;
391         }
392         if (!(tfo->tpg_check_demo_mode)) {
393                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n");
394                 return -EINVAL;
395         }
396         if (!(tfo->tpg_check_demo_mode_cache)) {
397                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n");
398                 return -EINVAL;
399         }
400         if (!(tfo->tpg_check_demo_mode_write_protect)) {
401                 printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n");
402                 return -EINVAL;
403         }
404         if (!(tfo->tpg_check_prod_mode_write_protect)) {
405                 printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n");
406                 return -EINVAL;
407         }
408         if (!(tfo->tpg_alloc_fabric_acl)) {
409                 printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n");
410                 return -EINVAL;
411         }
412         if (!(tfo->tpg_release_fabric_acl)) {
413                 printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n");
414                 return -EINVAL;
415         }
416         if (!(tfo->tpg_get_inst_index)) {
417                 printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n");
418                 return -EINVAL;
419         }
420         if (!(tfo->release_cmd_to_pool)) {
421                 printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n");
422                 return -EINVAL;
423         }
424         if (!(tfo->release_cmd_direct)) {
425                 printk(KERN_ERR "Missing tfo->release_cmd_direct()\n");
426                 return -EINVAL;
427         }
428         if (!(tfo->shutdown_session)) {
429                 printk(KERN_ERR "Missing tfo->shutdown_session()\n");
430                 return -EINVAL;
431         }
432         if (!(tfo->close_session)) {
433                 printk(KERN_ERR "Missing tfo->close_session()\n");
434                 return -EINVAL;
435         }
436         if (!(tfo->stop_session)) {
437                 printk(KERN_ERR "Missing tfo->stop_session()\n");
438                 return -EINVAL;
439         }
440         if (!(tfo->fall_back_to_erl0)) {
441                 printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n");
442                 return -EINVAL;
443         }
444         if (!(tfo->sess_logged_in)) {
445                 printk(KERN_ERR "Missing tfo->sess_logged_in()\n");
446                 return -EINVAL;
447         }
448         if (!(tfo->sess_get_index)) {
449                 printk(KERN_ERR "Missing tfo->sess_get_index()\n");
450                 return -EINVAL;
451         }
452         if (!(tfo->write_pending)) {
453                 printk(KERN_ERR "Missing tfo->write_pending()\n");
454                 return -EINVAL;
455         }
456         if (!(tfo->write_pending_status)) {
457                 printk(KERN_ERR "Missing tfo->write_pending_status()\n");
458                 return -EINVAL;
459         }
460         if (!(tfo->set_default_node_attributes)) {
461                 printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n");
462                 return -EINVAL;
463         }
464         if (!(tfo->get_task_tag)) {
465                 printk(KERN_ERR "Missing tfo->get_task_tag()\n");
466                 return -EINVAL;
467         }
468         if (!(tfo->get_cmd_state)) {
469                 printk(KERN_ERR "Missing tfo->get_cmd_state()\n");
470                 return -EINVAL;
471         }
472         if (!(tfo->new_cmd_failure)) {
473                 printk(KERN_ERR "Missing tfo->new_cmd_failure()\n");
474                 return -EINVAL;
475         }
476         if (!(tfo->queue_data_in)) {
477                 printk(KERN_ERR "Missing tfo->queue_data_in()\n");
478                 return -EINVAL;
479         }
480         if (!(tfo->queue_status)) {
481                 printk(KERN_ERR "Missing tfo->queue_status()\n");
482                 return -EINVAL;
483         }
484         if (!(tfo->queue_tm_rsp)) {
485                 printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n");
486                 return -EINVAL;
487         }
488         if (!(tfo->set_fabric_sense_len)) {
489                 printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n");
490                 return -EINVAL;
491         }
492         if (!(tfo->get_fabric_sense_len)) {
493                 printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n");
494                 return -EINVAL;
495         }
496         if (!(tfo->is_state_remove)) {
497                 printk(KERN_ERR "Missing tfo->is_state_remove()\n");
498                 return -EINVAL;
499         }
500         /*
501          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
502          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
503          * target_core_fabric_configfs.c WWN+TPG group context code.
504          */
505         if (!(tfo->fabric_make_wwn)) {
506                 printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n");
507                 return -EINVAL;
508         }
509         if (!(tfo->fabric_drop_wwn)) {
510                 printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n");
511                 return -EINVAL;
512         }
513         if (!(tfo->fabric_make_tpg)) {
514                 printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n");
515                 return -EINVAL;
516         }
517         if (!(tfo->fabric_drop_tpg)) {
518                 printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n");
519                 return -EINVAL;
520         }
521
522         return 0;
523 }
524
525 /*
526  * Called 2nd from fabric module with returned parameter of
527  * struct target_fabric_configfs * from target_fabric_configfs_init().
528  *
529  * Upon a successful registration, the new fabric's struct config_item is
530  * return.  Also, a pointer to this struct is set in the passed
531  * struct target_fabric_configfs.
532  */
533 int target_fabric_configfs_register(
534         struct target_fabric_configfs *tf)
535 {
536         struct config_group *su_group;
537         int ret;
538
539         if (!(tf)) {
540                 printk(KERN_ERR "Unable to locate target_fabric_configfs"
541                         " pointer\n");
542                 return -EINVAL;
543         }
544         if (!(tf->tf_subsys)) {
545                 printk(KERN_ERR "Unable to target struct config_subsystem"
546                         " pointer\n");
547                 return -EINVAL;
548         }
549         su_group = &tf->tf_subsys->su_group;
550         if (!(su_group)) {
551                 printk(KERN_ERR "Unable to locate target struct config_group"
552                         " pointer\n");
553                 return -EINVAL;
554         }
555         ret = target_fabric_tf_ops_check(tf);
556         if (ret < 0)
557                 return ret;
558
559         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
560                 ">>>>>>>>>>\n");
561         return 0;
562 }
563 EXPORT_SYMBOL(target_fabric_configfs_register);
564
565 void target_fabric_configfs_deregister(
566         struct target_fabric_configfs *tf)
567 {
568         struct config_group *su_group;
569         struct configfs_subsystem *su;
570
571         if (!(tf)) {
572                 printk(KERN_ERR "Unable to locate passed target_fabric_"
573                         "configfs\n");
574                 return;
575         }
576         su = tf->tf_subsys;
577         if (!(su)) {
578                 printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
579                         " pointer\n");
580                 return;
581         }
582         su_group = &tf->tf_subsys->su_group;
583         if (!(su_group)) {
584                 printk(KERN_ERR "Unable to locate target struct config_group"
585                         " pointer\n");
586                 return;
587         }
588
589         printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
590                         ">>>>>>>>>>>>\n");
591         mutex_lock(&g_tf_lock);
592         if (atomic_read(&tf->tf_access_cnt)) {
593                 mutex_unlock(&g_tf_lock);
594                 printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
595                         tf->tf_name);
596                 BUG();
597         }
598         list_del(&tf->tf_list);
599         mutex_unlock(&g_tf_lock);
600
601         printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
602                         " %s\n", tf->tf_name);
603         tf->tf_module = NULL;
604         tf->tf_subsys = NULL;
605         kfree(tf);
606
607         printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
608                         ">>>>>\n");
609         return;
610 }
611 EXPORT_SYMBOL(target_fabric_configfs_deregister);
612
613 /*##############################################################################
614 // Stop functions called by external Target Fabrics Modules
615 //############################################################################*/
616
617 /* Start functions for struct config_item_type target_core_dev_attrib_cit */
618
619 #define DEF_DEV_ATTRIB_SHOW(_name)                                      \
620 static ssize_t target_core_dev_show_attr_##_name(                       \
621         struct se_dev_attrib *da,                                       \
622         char *page)                                                     \
623 {                                                                       \
624         struct se_device *dev;                                          \
625         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
626         ssize_t rb;                                                     \
627                                                                         \
628         spin_lock(&se_dev->se_dev_lock);                                \
629         dev = se_dev->se_dev_ptr;                                       \
630         if (!(dev)) {                                                   \
631                 spin_unlock(&se_dev->se_dev_lock);                      \
632                 return -ENODEV;                                         \
633         }                                                               \
634         rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
635         spin_unlock(&se_dev->se_dev_lock);                              \
636                                                                         \
637         return rb;                                                      \
638 }
639
640 #define DEF_DEV_ATTRIB_STORE(_name)                                     \
641 static ssize_t target_core_dev_store_attr_##_name(                      \
642         struct se_dev_attrib *da,                                       \
643         const char *page,                                               \
644         size_t count)                                                   \
645 {                                                                       \
646         struct se_device *dev;                                          \
647         struct se_subsystem_dev *se_dev = da->da_sub_dev;                       \
648         unsigned long val;                                              \
649         int ret;                                                        \
650                                                                         \
651         spin_lock(&se_dev->se_dev_lock);                                \
652         dev = se_dev->se_dev_ptr;                                       \
653         if (!(dev)) {                                                   \
654                 spin_unlock(&se_dev->se_dev_lock);                      \
655                 return -ENODEV;                                         \
656         }                                                               \
657         ret = strict_strtoul(page, 0, &val);                            \
658         if (ret < 0) {                                                  \
659                 spin_unlock(&se_dev->se_dev_lock);                      \
660                 printk(KERN_ERR "strict_strtoul() failed with"          \
661                         " ret: %d\n", ret);                             \
662                 return -EINVAL;                                         \
663         }                                                               \
664         ret = se_dev_set_##_name(dev, (u32)val);                        \
665         spin_unlock(&se_dev->se_dev_lock);                              \
666                                                                         \
667         return (!ret) ? count : -EINVAL;                                \
668 }
669
670 #define DEF_DEV_ATTRIB(_name)                                           \
671 DEF_DEV_ATTRIB_SHOW(_name);                                             \
672 DEF_DEV_ATTRIB_STORE(_name);
673
674 #define DEF_DEV_ATTRIB_RO(_name)                                        \
675 DEF_DEV_ATTRIB_SHOW(_name);
676
677 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
678 #define SE_DEV_ATTR(_name, _mode)                                       \
679 static struct target_core_dev_attrib_attribute                          \
680                         target_core_dev_attrib_##_name =                \
681                 __CONFIGFS_EATTR(_name, _mode,                          \
682                 target_core_dev_show_attr_##_name,                      \
683                 target_core_dev_store_attr_##_name);
684
685 #define SE_DEV_ATTR_RO(_name);                                          \
686 static struct target_core_dev_attrib_attribute                          \
687                         target_core_dev_attrib_##_name =                \
688         __CONFIGFS_EATTR_RO(_name,                                      \
689         target_core_dev_show_attr_##_name);
690
691 DEF_DEV_ATTRIB(emulate_dpo);
692 SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
693
694 DEF_DEV_ATTRIB(emulate_fua_write);
695 SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
696
697 DEF_DEV_ATTRIB(emulate_fua_read);
698 SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
699
700 DEF_DEV_ATTRIB(emulate_write_cache);
701 SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
702
703 DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
704 SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
705
706 DEF_DEV_ATTRIB(emulate_tas);
707 SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
708
709 DEF_DEV_ATTRIB(emulate_tpu);
710 SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
711
712 DEF_DEV_ATTRIB(emulate_tpws);
713 SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
714
715 DEF_DEV_ATTRIB(enforce_pr_isids);
716 SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
717
718 DEF_DEV_ATTRIB_RO(hw_block_size);
719 SE_DEV_ATTR_RO(hw_block_size);
720
721 DEF_DEV_ATTRIB(block_size);
722 SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
723
724 DEF_DEV_ATTRIB_RO(hw_max_sectors);
725 SE_DEV_ATTR_RO(hw_max_sectors);
726
727 DEF_DEV_ATTRIB(max_sectors);
728 SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
729
730 DEF_DEV_ATTRIB(optimal_sectors);
731 SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
732
733 DEF_DEV_ATTRIB_RO(hw_queue_depth);
734 SE_DEV_ATTR_RO(hw_queue_depth);
735
736 DEF_DEV_ATTRIB(queue_depth);
737 SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
738
739 DEF_DEV_ATTRIB(task_timeout);
740 SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
741
742 DEF_DEV_ATTRIB(max_unmap_lba_count);
743 SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
744
745 DEF_DEV_ATTRIB(max_unmap_block_desc_count);
746 SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
747
748 DEF_DEV_ATTRIB(unmap_granularity);
749 SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
750
751 DEF_DEV_ATTRIB(unmap_granularity_alignment);
752 SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
753
754 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
755
756 static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
757         &target_core_dev_attrib_emulate_dpo.attr,
758         &target_core_dev_attrib_emulate_fua_write.attr,
759         &target_core_dev_attrib_emulate_fua_read.attr,
760         &target_core_dev_attrib_emulate_write_cache.attr,
761         &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
762         &target_core_dev_attrib_emulate_tas.attr,
763         &target_core_dev_attrib_emulate_tpu.attr,
764         &target_core_dev_attrib_emulate_tpws.attr,
765         &target_core_dev_attrib_enforce_pr_isids.attr,
766         &target_core_dev_attrib_hw_block_size.attr,
767         &target_core_dev_attrib_block_size.attr,
768         &target_core_dev_attrib_hw_max_sectors.attr,
769         &target_core_dev_attrib_max_sectors.attr,
770         &target_core_dev_attrib_optimal_sectors.attr,
771         &target_core_dev_attrib_hw_queue_depth.attr,
772         &target_core_dev_attrib_queue_depth.attr,
773         &target_core_dev_attrib_task_timeout.attr,
774         &target_core_dev_attrib_max_unmap_lba_count.attr,
775         &target_core_dev_attrib_max_unmap_block_desc_count.attr,
776         &target_core_dev_attrib_unmap_granularity.attr,
777         &target_core_dev_attrib_unmap_granularity_alignment.attr,
778         NULL,
779 };
780
781 static struct configfs_item_operations target_core_dev_attrib_ops = {
782         .show_attribute         = target_core_dev_attrib_attr_show,
783         .store_attribute        = target_core_dev_attrib_attr_store,
784 };
785
786 static struct config_item_type target_core_dev_attrib_cit = {
787         .ct_item_ops            = &target_core_dev_attrib_ops,
788         .ct_attrs               = target_core_dev_attrib_attrs,
789         .ct_owner               = THIS_MODULE,
790 };
791
792 /* End functions for struct config_item_type target_core_dev_attrib_cit */
793
794 /*  Start functions for struct config_item_type target_core_dev_wwn_cit */
795
796 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
797 #define SE_DEV_WWN_ATTR(_name, _mode)                                   \
798 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
799                 __CONFIGFS_EATTR(_name, _mode,                          \
800                 target_core_dev_wwn_show_attr_##_name,                  \
801                 target_core_dev_wwn_store_attr_##_name);
802
803 #define SE_DEV_WWN_ATTR_RO(_name);                                      \
804 do {                                                                    \
805         static struct target_core_dev_wwn_attribute                     \
806                         target_core_dev_wwn_##_name =                   \
807                 __CONFIGFS_EATTR_RO(_name,                              \
808                 target_core_dev_wwn_show_attr_##_name);                 \
809 } while (0);
810
811 /*
812  * VPD page 0x80 Unit serial
813  */
814 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
815         struct t10_wwn *t10_wwn,
816         char *page)
817 {
818         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
819         struct se_device *dev;
820
821         dev = se_dev->se_dev_ptr;
822         if (!(dev))
823                 return -ENODEV;
824
825         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
826                 &t10_wwn->unit_serial[0]);
827 }
828
829 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
830         struct t10_wwn *t10_wwn,
831         const char *page,
832         size_t count)
833 {
834         struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
835         struct se_device *dev;
836         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
837
838         /*
839          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
840          * from the struct scsi_device level firmware, do not allow
841          * VPD Unit Serial to be emulated.
842          *
843          * Note this struct scsi_device could also be emulating VPD
844          * information from its drivers/scsi LLD.  But for now we assume
845          * it is doing 'the right thing' wrt a world wide unique
846          * VPD Unit Serial Number that OS dependent multipath can depend on.
847          */
848         if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
849                 printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
850                         " Unit Serial, ignoring request\n");
851                 return -EOPNOTSUPP;
852         }
853
854         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
855                 printk(KERN_ERR "Emulated VPD Unit Serial exceeds"
856                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
857                 return -EOVERFLOW;
858         }
859         /*
860          * Check to see if any active $FABRIC_MOD exports exist.  If they
861          * do exist, fail here as changing this information on the fly
862          * (underneath the initiator side OS dependent multipath code)
863          * could cause negative effects.
864          */
865         dev = su_dev->se_dev_ptr;
866         if ((dev)) {
867                 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
868                         printk(KERN_ERR "Unable to set VPD Unit Serial while"
869                                 " active %d $FABRIC_MOD exports exist\n",
870                                 atomic_read(&dev->dev_export_obj.obj_access_count));
871                         return -EINVAL;
872                 }
873         }
874         /*
875          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
876          *
877          * Also, strip any newline added from the userspace
878          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
879          */
880         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
881         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
882         snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
883                         "%s", strstrip(buf));
884         su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
885
886         printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
887                         " %s\n", su_dev->t10_wwn.unit_serial);
888
889         return count;
890 }
891
892 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
893
894 /*
895  * VPD page 0x83 Protocol Identifier
896  */
897 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
898         struct t10_wwn *t10_wwn,
899         char *page)
900 {
901         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
902         struct se_device *dev;
903         struct t10_vpd *vpd;
904         unsigned char buf[VPD_TMP_BUF_SIZE];
905         ssize_t len = 0;
906
907         dev = se_dev->se_dev_ptr;
908         if (!(dev))
909                 return -ENODEV;
910
911         memset(buf, 0, VPD_TMP_BUF_SIZE);
912
913         spin_lock(&t10_wwn->t10_vpd_lock);
914         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
915                 if (!(vpd->protocol_identifier_set))
916                         continue;
917
918                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
919
920                 if ((len + strlen(buf) >= PAGE_SIZE))
921                         break;
922
923                 len += sprintf(page+len, "%s", buf);
924         }
925         spin_unlock(&t10_wwn->t10_vpd_lock);
926
927         return len;
928 }
929
930 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
931         struct t10_wwn *t10_wwn,
932         const char *page,
933         size_t count)
934 {
935         return -ENOSYS;
936 }
937
938 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
939
940 /*
941  * Generic wrapper for dumping VPD identifiers by association.
942  */
943 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
944 static ssize_t target_core_dev_wwn_show_attr_##_name(                   \
945         struct t10_wwn *t10_wwn,                                        \
946         char *page)                                                     \
947 {                                                                       \
948         struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;         \
949         struct se_device *dev;                                          \
950         struct t10_vpd *vpd;                                                    \
951         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
952         ssize_t len = 0;                                                \
953                                                                         \
954         dev = se_dev->se_dev_ptr;                                       \
955         if (!(dev))                                                     \
956                 return -ENODEV;                                         \
957                                                                         \
958         spin_lock(&t10_wwn->t10_vpd_lock);                              \
959         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
960                 if (vpd->association != _assoc)                         \
961                         continue;                                       \
962                                                                         \
963                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
964                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
965                 if ((len + strlen(buf) >= PAGE_SIZE))                   \
966                         break;                                          \
967                 len += sprintf(page+len, "%s", buf);                    \
968                                                                         \
969                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
970                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
971                 if ((len + strlen(buf) >= PAGE_SIZE))                   \
972                         break;                                          \
973                 len += sprintf(page+len, "%s", buf);                    \
974                                                                         \
975                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
976                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
977                 if ((len + strlen(buf) >= PAGE_SIZE))                   \
978                         break;                                          \
979                 len += sprintf(page+len, "%s", buf);                    \
980         }                                                               \
981         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
982                                                                         \
983         return len;                                                     \
984 }
985
986 /*
987  * VPD page 0x83 Assoication: Logical Unit
988  */
989 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
990
991 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
992         struct t10_wwn *t10_wwn,
993         const char *page,
994         size_t count)
995 {
996         return -ENOSYS;
997 }
998
999 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1000
1001 /*
1002  * VPD page 0x83 Association: Target Port
1003  */
1004 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1005
1006 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1007         struct t10_wwn *t10_wwn,
1008         const char *page,
1009         size_t count)
1010 {
1011         return -ENOSYS;
1012 }
1013
1014 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1015
1016 /*
1017  * VPD page 0x83 Association: SCSI Target Device
1018  */
1019 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1020
1021 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1022         struct t10_wwn *t10_wwn,
1023         const char *page,
1024         size_t count)
1025 {
1026         return -ENOSYS;
1027 }
1028
1029 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1030
1031 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1032
1033 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1034         &target_core_dev_wwn_vpd_unit_serial.attr,
1035         &target_core_dev_wwn_vpd_protocol_identifier.attr,
1036         &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1037         &target_core_dev_wwn_vpd_assoc_target_port.attr,
1038         &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1039         NULL,
1040 };
1041
1042 static struct configfs_item_operations target_core_dev_wwn_ops = {
1043         .show_attribute         = target_core_dev_wwn_attr_show,
1044         .store_attribute        = target_core_dev_wwn_attr_store,
1045 };
1046
1047 static struct config_item_type target_core_dev_wwn_cit = {
1048         .ct_item_ops            = &target_core_dev_wwn_ops,
1049         .ct_attrs               = target_core_dev_wwn_attrs,
1050         .ct_owner               = THIS_MODULE,
1051 };
1052
1053 /*  End functions for struct config_item_type target_core_dev_wwn_cit */
1054
1055 /*  Start functions for struct config_item_type target_core_dev_pr_cit */
1056
1057 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1058 #define SE_DEV_PR_ATTR(_name, _mode)                                    \
1059 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1060         __CONFIGFS_EATTR(_name, _mode,                                  \
1061         target_core_dev_pr_show_attr_##_name,                           \
1062         target_core_dev_pr_store_attr_##_name);
1063
1064 #define SE_DEV_PR_ATTR_RO(_name);                                       \
1065 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1066         __CONFIGFS_EATTR_RO(_name,                                      \
1067         target_core_dev_pr_show_attr_##_name);
1068
1069 /*
1070  * res_holder
1071  */
1072 static ssize_t target_core_dev_pr_show_spc3_res(
1073         struct se_device *dev,
1074         char *page,
1075         ssize_t *len)
1076 {
1077         struct se_node_acl *se_nacl;
1078         struct t10_pr_registration *pr_reg;
1079         char i_buf[PR_REG_ISID_ID_LEN];
1080         int prf_isid;
1081
1082         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1083
1084         spin_lock(&dev->dev_reservation_lock);
1085         pr_reg = dev->dev_pr_res_holder;
1086         if (!(pr_reg)) {
1087                 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1088                 spin_unlock(&dev->dev_reservation_lock);
1089                 return *len;
1090         }
1091         se_nacl = pr_reg->pr_reg_nacl;
1092         prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1093                                 PR_REG_ISID_ID_LEN);
1094
1095         *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1096                 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1097                 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1098         spin_unlock(&dev->dev_reservation_lock);
1099
1100         return *len;
1101 }
1102
1103 static ssize_t target_core_dev_pr_show_spc2_res(
1104         struct se_device *dev,
1105         char *page,
1106         ssize_t *len)
1107 {
1108         struct se_node_acl *se_nacl;
1109
1110         spin_lock(&dev->dev_reservation_lock);
1111         se_nacl = dev->dev_reserved_node_acl;
1112         if (!(se_nacl)) {
1113                 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1114                 spin_unlock(&dev->dev_reservation_lock);
1115                 return *len;
1116         }
1117         *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1118                 TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
1119                 se_nacl->initiatorname);
1120         spin_unlock(&dev->dev_reservation_lock);
1121
1122         return *len;
1123 }
1124
1125 static ssize_t target_core_dev_pr_show_attr_res_holder(
1126         struct se_subsystem_dev *su_dev,
1127         char *page)
1128 {
1129         ssize_t len = 0;
1130
1131         if (!(su_dev->se_dev_ptr))
1132                 return -ENODEV;
1133
1134         switch (T10_RES(su_dev)->res_type) {
1135         case SPC3_PERSISTENT_RESERVATIONS:
1136                 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1137                                 page, &len);
1138                 break;
1139         case SPC2_RESERVATIONS:
1140                 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1141                                 page, &len);
1142                 break;
1143         case SPC_PASSTHROUGH:
1144                 len += sprintf(page+len, "Passthrough\n");
1145                 break;
1146         default:
1147                 len += sprintf(page+len, "Unknown\n");
1148                 break;
1149         }
1150
1151         return len;
1152 }
1153
1154 SE_DEV_PR_ATTR_RO(res_holder);
1155
1156 /*
1157  * res_pr_all_tgt_pts
1158  */
1159 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1160         struct se_subsystem_dev *su_dev,
1161         char *page)
1162 {
1163         struct se_device *dev;
1164         struct t10_pr_registration *pr_reg;
1165         ssize_t len = 0;
1166
1167         dev = su_dev->se_dev_ptr;
1168         if (!(dev))
1169                 return -ENODEV;
1170
1171         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1172                 return len;
1173
1174         spin_lock(&dev->dev_reservation_lock);
1175         pr_reg = dev->dev_pr_res_holder;
1176         if (!(pr_reg)) {
1177                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1178                 spin_unlock(&dev->dev_reservation_lock);
1179                 return len;
1180         }
1181         /*
1182          * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1183          * Basic PERSISTENT RESERVER OUT parameter list, page 290
1184          */
1185         if (pr_reg->pr_reg_all_tg_pt)
1186                 len = sprintf(page, "SPC-3 Reservation: All Target"
1187                         " Ports registration\n");
1188         else
1189                 len = sprintf(page, "SPC-3 Reservation: Single"
1190                         " Target Port registration\n");
1191         spin_unlock(&dev->dev_reservation_lock);
1192
1193         return len;
1194 }
1195
1196 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1197
1198 /*
1199  * res_pr_generation
1200  */
1201 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1202         struct se_subsystem_dev *su_dev,
1203         char *page)
1204 {
1205         if (!(su_dev->se_dev_ptr))
1206                 return -ENODEV;
1207
1208         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1209                 return 0;
1210
1211         return sprintf(page, "0x%08x\n", T10_RES(su_dev)->pr_generation);
1212 }
1213
1214 SE_DEV_PR_ATTR_RO(res_pr_generation);
1215
1216 /*
1217  * res_pr_holder_tg_port
1218  */
1219 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1220         struct se_subsystem_dev *su_dev,
1221         char *page)
1222 {
1223         struct se_device *dev;
1224         struct se_node_acl *se_nacl;
1225         struct se_lun *lun;
1226         struct se_portal_group *se_tpg;
1227         struct t10_pr_registration *pr_reg;
1228         struct target_core_fabric_ops *tfo;
1229         ssize_t len = 0;
1230
1231         dev = su_dev->se_dev_ptr;
1232         if (!(dev))
1233                 return -ENODEV;
1234
1235         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1236                 return len;
1237
1238         spin_lock(&dev->dev_reservation_lock);
1239         pr_reg = dev->dev_pr_res_holder;
1240         if (!(pr_reg)) {
1241                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1242                 spin_unlock(&dev->dev_reservation_lock);
1243                 return len;
1244         }
1245         se_nacl = pr_reg->pr_reg_nacl;
1246         se_tpg = se_nacl->se_tpg;
1247         lun = pr_reg->pr_reg_tg_pt_lun;
1248         tfo = TPG_TFO(se_tpg);
1249
1250         len += sprintf(page+len, "SPC-3 Reservation: %s"
1251                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1252                 tfo->tpg_get_wwn(se_tpg));
1253         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1254                 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1255                 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1256                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1257                 tfo->get_fabric_name(), lun->unpacked_lun);
1258         spin_unlock(&dev->dev_reservation_lock);
1259
1260         return len;
1261 }
1262
1263 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1264
1265 /*
1266  * res_pr_registered_i_pts
1267  */
1268 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1269         struct se_subsystem_dev *su_dev,
1270         char *page)
1271 {
1272         struct target_core_fabric_ops *tfo;
1273         struct t10_pr_registration *pr_reg;
1274         unsigned char buf[384];
1275         char i_buf[PR_REG_ISID_ID_LEN];
1276         ssize_t len = 0;
1277         int reg_count = 0, prf_isid;
1278
1279         if (!(su_dev->se_dev_ptr))
1280                 return -ENODEV;
1281
1282         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1283                 return len;
1284
1285         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1286
1287         spin_lock(&T10_RES(su_dev)->registration_lock);
1288         list_for_each_entry(pr_reg, &T10_RES(su_dev)->registration_list,
1289                         pr_reg_list) {
1290
1291                 memset(buf, 0, 384);
1292                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1293                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1294                 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1295                                         PR_REG_ISID_ID_LEN);
1296                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1297                         tfo->get_fabric_name(),
1298                         pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1299                         &i_buf[0] : "", pr_reg->pr_res_key,
1300                         pr_reg->pr_res_generation);
1301
1302                 if ((len + strlen(buf) >= PAGE_SIZE))
1303                         break;
1304
1305                 len += sprintf(page+len, "%s", buf);
1306                 reg_count++;
1307         }
1308         spin_unlock(&T10_RES(su_dev)->registration_lock);
1309
1310         if (!(reg_count))
1311                 len += sprintf(page+len, "None\n");
1312
1313         return len;
1314 }
1315
1316 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1317
1318 /*
1319  * res_pr_type
1320  */
1321 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1322         struct se_subsystem_dev *su_dev,
1323         char *page)
1324 {
1325         struct se_device *dev;
1326         struct t10_pr_registration *pr_reg;
1327         ssize_t len = 0;
1328
1329         dev = su_dev->se_dev_ptr;
1330         if (!(dev))
1331                 return -ENODEV;
1332
1333         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1334                 return len;
1335
1336         spin_lock(&dev->dev_reservation_lock);
1337         pr_reg = dev->dev_pr_res_holder;
1338         if (!(pr_reg)) {
1339                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1340                 spin_unlock(&dev->dev_reservation_lock);
1341                 return len;
1342         }
1343         len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1344                 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1345         spin_unlock(&dev->dev_reservation_lock);
1346
1347         return len;
1348 }
1349
1350 SE_DEV_PR_ATTR_RO(res_pr_type);
1351
1352 /*
1353  * res_type
1354  */
1355 static ssize_t target_core_dev_pr_show_attr_res_type(
1356         struct se_subsystem_dev *su_dev,
1357         char *page)
1358 {
1359         ssize_t len = 0;
1360
1361         if (!(su_dev->se_dev_ptr))
1362                 return -ENODEV;
1363
1364         switch (T10_RES(su_dev)->res_type) {
1365         case SPC3_PERSISTENT_RESERVATIONS:
1366                 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1367                 break;
1368         case SPC2_RESERVATIONS:
1369                 len = sprintf(page, "SPC2_RESERVATIONS\n");
1370                 break;
1371         case SPC_PASSTHROUGH:
1372                 len = sprintf(page, "SPC_PASSTHROUGH\n");
1373                 break;
1374         default:
1375                 len = sprintf(page, "UNKNOWN\n");
1376                 break;
1377         }
1378
1379         return len;
1380 }
1381
1382 SE_DEV_PR_ATTR_RO(res_type);
1383
1384 /*
1385  * res_aptpl_active
1386  */
1387
1388 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1389         struct se_subsystem_dev *su_dev,
1390         char *page)
1391 {
1392         if (!(su_dev->se_dev_ptr))
1393                 return -ENODEV;
1394
1395         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1396                 return 0;
1397
1398         return sprintf(page, "APTPL Bit Status: %s\n",
1399                 (T10_RES(su_dev)->pr_aptpl_active) ? "Activated" : "Disabled");
1400 }
1401
1402 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1403
1404 /*
1405  * res_aptpl_metadata
1406  */
1407 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1408         struct se_subsystem_dev *su_dev,
1409         char *page)
1410 {
1411         if (!(su_dev->se_dev_ptr))
1412                 return -ENODEV;
1413
1414         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1415                 return 0;
1416
1417         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1418 }
1419
1420 enum {
1421         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1422         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1423         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1424         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1425 };
1426
1427 static match_table_t tokens = {
1428         {Opt_initiator_fabric, "initiator_fabric=%s"},
1429         {Opt_initiator_node, "initiator_node=%s"},
1430         {Opt_initiator_sid, "initiator_sid=%s"},
1431         {Opt_sa_res_key, "sa_res_key=%s"},
1432         {Opt_res_holder, "res_holder=%d"},
1433         {Opt_res_type, "res_type=%d"},
1434         {Opt_res_scope, "res_scope=%d"},
1435         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1436         {Opt_mapped_lun, "mapped_lun=%d"},
1437         {Opt_target_fabric, "target_fabric=%s"},
1438         {Opt_target_node, "target_node=%s"},
1439         {Opt_tpgt, "tpgt=%d"},
1440         {Opt_port_rtpi, "port_rtpi=%d"},
1441         {Opt_target_lun, "target_lun=%d"},
1442         {Opt_err, NULL}
1443 };
1444
1445 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1446         struct se_subsystem_dev *su_dev,
1447         const char *page,
1448         size_t count)
1449 {
1450         struct se_device *dev;
1451         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1452         unsigned char *t_fabric = NULL, *t_port = NULL;
1453         char *orig, *ptr, *arg_p, *opts;
1454         substring_t args[MAX_OPT_ARGS];
1455         unsigned long long tmp_ll;
1456         u64 sa_res_key = 0;
1457         u32 mapped_lun = 0, target_lun = 0;
1458         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1459         u16 port_rpti = 0, tpgt = 0;
1460         u8 type = 0, scope;
1461
1462         dev = su_dev->se_dev_ptr;
1463         if (!(dev))
1464                 return -ENODEV;
1465
1466         if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
1467                 return 0;
1468
1469         if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1470                 printk(KERN_INFO "Unable to process APTPL metadata while"
1471                         " active fabric exports exist\n");
1472                 return -EINVAL;
1473         }
1474
1475         opts = kstrdup(page, GFP_KERNEL);
1476         if (!opts)
1477                 return -ENOMEM;
1478
1479         orig = opts;
1480         while ((ptr = strsep(&opts, ",")) != NULL) {
1481                 if (!*ptr)
1482                         continue;
1483
1484                 token = match_token(ptr, tokens, args);
1485                 switch (token) {
1486                 case Opt_initiator_fabric:
1487                         i_fabric = match_strdup(&args[0]);
1488                         if (!i_fabric) {
1489                                 ret = -ENOMEM;
1490                                 goto out;
1491                         }
1492                         break;
1493                 case Opt_initiator_node:
1494                         i_port = match_strdup(&args[0]);
1495                         if (!i_port) {
1496                                 ret = -ENOMEM;
1497                                 goto out;
1498                         }
1499                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1500                                 printk(KERN_ERR "APTPL metadata initiator_node="
1501                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1502                                         PR_APTPL_MAX_IPORT_LEN);
1503                                 ret = -EINVAL;
1504                                 break;
1505                         }
1506                         break;
1507                 case Opt_initiator_sid:
1508                         isid = match_strdup(&args[0]);
1509                         if (!isid) {
1510                                 ret = -ENOMEM;
1511                                 goto out;
1512                         }
1513                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1514                                 printk(KERN_ERR "APTPL metadata initiator_isid"
1515                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1516                                         PR_REG_ISID_LEN);
1517                                 ret = -EINVAL;
1518                                 break;
1519                         }
1520                         break;
1521                 case Opt_sa_res_key:
1522                         arg_p = match_strdup(&args[0]);
1523                         if (!arg_p) {
1524                                 ret = -ENOMEM;
1525                                 goto out;
1526                         }
1527                         ret = strict_strtoull(arg_p, 0, &tmp_ll);
1528                         if (ret < 0) {
1529                                 printk(KERN_ERR "strict_strtoull() failed for"
1530                                         " sa_res_key=\n");
1531                                 goto out;
1532                         }
1533                         sa_res_key = (u64)tmp_ll;
1534                         break;
1535                 /*
1536                  * PR APTPL Metadata for Reservation
1537                  */
1538                 case Opt_res_holder:
1539                         match_int(args, &arg);
1540                         res_holder = arg;
1541                         break;
1542                 case Opt_res_type:
1543                         match_int(args, &arg);
1544                         type = (u8)arg;
1545                         break;
1546                 case Opt_res_scope:
1547                         match_int(args, &arg);
1548                         scope = (u8)arg;
1549                         break;
1550                 case Opt_res_all_tg_pt:
1551                         match_int(args, &arg);
1552                         all_tg_pt = (int)arg;
1553                         break;
1554                 case Opt_mapped_lun:
1555                         match_int(args, &arg);
1556                         mapped_lun = (u32)arg;
1557                         break;
1558                 /*
1559                  * PR APTPL Metadata for Target Port
1560                  */
1561                 case Opt_target_fabric:
1562                         t_fabric = match_strdup(&args[0]);
1563                         if (!t_fabric) {
1564                                 ret = -ENOMEM;
1565                                 goto out;
1566                         }
1567                         break;
1568                 case Opt_target_node:
1569                         t_port = match_strdup(&args[0]);
1570                         if (!t_port) {
1571                                 ret = -ENOMEM;
1572                                 goto out;
1573                         }
1574                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1575                                 printk(KERN_ERR "APTPL metadata target_node="
1576                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1577                                         PR_APTPL_MAX_TPORT_LEN);
1578                                 ret = -EINVAL;
1579                                 break;
1580                         }
1581                         break;
1582                 case Opt_tpgt:
1583                         match_int(args, &arg);
1584                         tpgt = (u16)arg;
1585                         break;
1586                 case Opt_port_rtpi:
1587                         match_int(args, &arg);
1588                         port_rpti = (u16)arg;
1589                         break;
1590                 case Opt_target_lun:
1591                         match_int(args, &arg);
1592                         target_lun = (u32)arg;
1593                         break;
1594                 default:
1595                         break;
1596                 }
1597         }
1598
1599         if (!(i_port) || !(t_port) || !(sa_res_key)) {
1600                 printk(KERN_ERR "Illegal parameters for APTPL registration\n");
1601                 ret = -EINVAL;
1602                 goto out;
1603         }
1604
1605         if (res_holder && !(type)) {
1606                 printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
1607                                 " holder\n", type);
1608                 ret = -EINVAL;
1609                 goto out;
1610         }
1611
1612         ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
1613                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1614                         res_holder, all_tg_pt, type);
1615 out:
1616         kfree(i_fabric);
1617         kfree(i_port);
1618         kfree(isid);
1619         kfree(t_fabric);
1620         kfree(t_port);
1621         kfree(orig);
1622         return (ret == 0) ? count : ret;
1623 }
1624
1625 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1626
1627 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1628
1629 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1630         &target_core_dev_pr_res_holder.attr,
1631         &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1632         &target_core_dev_pr_res_pr_generation.attr,
1633         &target_core_dev_pr_res_pr_holder_tg_port.attr,
1634         &target_core_dev_pr_res_pr_registered_i_pts.attr,
1635         &target_core_dev_pr_res_pr_type.attr,
1636         &target_core_dev_pr_res_type.attr,
1637         &target_core_dev_pr_res_aptpl_active.attr,
1638         &target_core_dev_pr_res_aptpl_metadata.attr,
1639         NULL,
1640 };
1641
1642 static struct configfs_item_operations target_core_dev_pr_ops = {
1643         .show_attribute         = target_core_dev_pr_attr_show,
1644         .store_attribute        = target_core_dev_pr_attr_store,
1645 };
1646
1647 static struct config_item_type target_core_dev_pr_cit = {
1648         .ct_item_ops            = &target_core_dev_pr_ops,
1649         .ct_attrs               = target_core_dev_pr_attrs,
1650         .ct_owner               = THIS_MODULE,
1651 };
1652
1653 /*  End functions for struct config_item_type target_core_dev_pr_cit */
1654
1655 /*  Start functions for struct config_item_type target_core_dev_cit */
1656
1657 static ssize_t target_core_show_dev_info(void *p, char *page)
1658 {
1659         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1660         struct se_hba *hba = se_dev->se_dev_hba;
1661         struct se_subsystem_api *t = hba->transport;
1662         int bl = 0;
1663         ssize_t read_bytes = 0;
1664
1665         if (!(se_dev->se_dev_ptr))
1666                 return -ENODEV;
1667
1668         transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1669         read_bytes += bl;
1670         read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1671         return read_bytes;
1672 }
1673
1674 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1675         .attr   = { .ca_owner = THIS_MODULE,
1676                     .ca_name = "info",
1677                     .ca_mode = S_IRUGO },
1678         .show   = target_core_show_dev_info,
1679         .store  = NULL,
1680 };
1681
1682 static ssize_t target_core_store_dev_control(
1683         void *p,
1684         const char *page,
1685         size_t count)
1686 {
1687         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1688         struct se_hba *hba = se_dev->se_dev_hba;
1689         struct se_subsystem_api *t = hba->transport;
1690
1691         if (!(se_dev->se_dev_su_ptr)) {
1692                 printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
1693                                 "_dev_su_ptr\n");
1694                 return -EINVAL;
1695         }
1696
1697         return t->set_configfs_dev_params(hba, se_dev, page, count);
1698 }
1699
1700 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1701         .attr   = { .ca_owner = THIS_MODULE,
1702                     .ca_name = "control",
1703                     .ca_mode = S_IWUSR },
1704         .show   = NULL,
1705         .store  = target_core_store_dev_control,
1706 };
1707
1708 static ssize_t target_core_show_dev_alias(void *p, char *page)
1709 {
1710         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1711
1712         if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1713                 return 0;
1714
1715         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1716 }
1717
1718 static ssize_t target_core_store_dev_alias(
1719         void *p,
1720         const char *page,
1721         size_t count)
1722 {
1723         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1724         struct se_hba *hba = se_dev->se_dev_hba;
1725         ssize_t read_bytes;
1726
1727         if (count > (SE_DEV_ALIAS_LEN-1)) {
1728                 printk(KERN_ERR "alias count: %d exceeds"
1729                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1730                         SE_DEV_ALIAS_LEN-1);
1731                 return -EINVAL;
1732         }
1733
1734         se_dev->su_dev_flags |= SDF_USING_ALIAS;
1735         read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1736                         "%s", page);
1737
1738         printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
1739                 config_item_name(&hba->hba_group.cg_item),
1740                 config_item_name(&se_dev->se_dev_group.cg_item),
1741                 se_dev->se_dev_alias);
1742
1743         return read_bytes;
1744 }
1745
1746 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1747         .attr   = { .ca_owner = THIS_MODULE,
1748                     .ca_name = "alias",
1749                     .ca_mode =  S_IRUGO | S_IWUSR },
1750         .show   = target_core_show_dev_alias,
1751         .store  = target_core_store_dev_alias,
1752 };
1753
1754 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1755 {
1756         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1757
1758         if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1759                 return 0;
1760
1761         return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1762 }
1763
1764 static ssize_t target_core_store_dev_udev_path(
1765         void *p,
1766         const char *page,
1767         size_t count)
1768 {
1769         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1770         struct se_hba *hba = se_dev->se_dev_hba;
1771         ssize_t read_bytes;
1772
1773         if (count > (SE_UDEV_PATH_LEN-1)) {
1774                 printk(KERN_ERR "udev_path count: %d exceeds"
1775                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1776                         SE_UDEV_PATH_LEN-1);
1777                 return -EINVAL;
1778         }
1779
1780         se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1781         read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1782                         "%s", page);
1783
1784         printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1785                 config_item_name(&hba->hba_group.cg_item),
1786                 config_item_name(&se_dev->se_dev_group.cg_item),
1787                 se_dev->se_dev_udev_path);
1788
1789         return read_bytes;
1790 }
1791
1792 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1793         .attr   = { .ca_owner = THIS_MODULE,
1794                     .ca_name = "udev_path",
1795                     .ca_mode =  S_IRUGO | S_IWUSR },
1796         .show   = target_core_show_dev_udev_path,
1797         .store  = target_core_store_dev_udev_path,
1798 };
1799
1800 static ssize_t target_core_store_dev_enable(
1801         void *p,
1802         const char *page,
1803         size_t count)
1804 {
1805         struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1806         struct se_device *dev;
1807         struct se_hba *hba = se_dev->se_dev_hba;
1808         struct se_subsystem_api *t = hba->transport;
1809         char *ptr;
1810
1811         ptr = strstr(page, "1");
1812         if (!(ptr)) {
1813                 printk(KERN_ERR "For dev_enable ops, only valid value"
1814                                 " is \"1\"\n");
1815                 return -EINVAL;
1816         }
1817         if ((se_dev->se_dev_ptr)) {
1818                 printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
1819                                 " object\n");
1820                 return -EEXIST;
1821         }
1822
1823         if (t->check_configfs_dev_params(hba, se_dev) < 0)
1824                 return -EINVAL;
1825
1826         dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1827         if (IS_ERR(dev))
1828                 return PTR_ERR(dev);
1829         else if (!dev)
1830                 return -EINVAL;
1831
1832         se_dev->se_dev_ptr = dev;
1833         printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1834                 " %p\n", se_dev->se_dev_ptr);
1835
1836         return count;
1837 }
1838
1839 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1840         .attr   = { .ca_owner = THIS_MODULE,
1841                     .ca_name = "enable",
1842                     .ca_mode = S_IWUSR },
1843         .show   = NULL,
1844         .store  = target_core_store_dev_enable,
1845 };
1846
1847 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1848 {
1849         struct se_device *dev;
1850         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1851         struct config_item *lu_ci;
1852         struct t10_alua_lu_gp *lu_gp;
1853         struct t10_alua_lu_gp_member *lu_gp_mem;
1854         ssize_t len = 0;
1855
1856         dev = su_dev->se_dev_ptr;
1857         if (!(dev))
1858                 return -ENODEV;
1859
1860         if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
1861                 return len;
1862
1863         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1864         if (!(lu_gp_mem)) {
1865                 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1866                                 " pointer\n");
1867                 return -EINVAL;
1868         }
1869
1870         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1871         lu_gp = lu_gp_mem->lu_gp;
1872         if ((lu_gp)) {
1873                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1874                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1875                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1876         }
1877         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1878
1879         return len;
1880 }
1881
1882 static ssize_t target_core_store_alua_lu_gp(
1883         void *p,
1884         const char *page,
1885         size_t count)
1886 {
1887         struct se_device *dev;
1888         struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1889         struct se_hba *hba = su_dev->se_dev_hba;
1890         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1891         struct t10_alua_lu_gp_member *lu_gp_mem;
1892         unsigned char buf[LU_GROUP_NAME_BUF];
1893         int move = 0;
1894
1895         dev = su_dev->se_dev_ptr;
1896         if (!(dev))
1897                 return -ENODEV;
1898
1899         if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
1900                 printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1901                         config_item_name(&hba->hba_group.cg_item),
1902                         config_item_name(&su_dev->se_dev_group.cg_item));
1903                 return -EINVAL;
1904         }
1905         if (count > LU_GROUP_NAME_BUF) {
1906                 printk(KERN_ERR "ALUA LU Group Alias too large!\n");
1907                 return -EINVAL;
1908         }
1909         memset(buf, 0, LU_GROUP_NAME_BUF);
1910         memcpy(buf, page, count);
1911         /*
1912          * Any ALUA logical unit alias besides "NULL" means we will be
1913          * making a new group association.
1914          */
1915         if (strcmp(strstrip(buf), "NULL")) {
1916                 /*
1917                  * core_alua_get_lu_gp_by_name() will increment reference to
1918                  * struct t10_alua_lu_gp.  This reference is released with
1919                  * core_alua_get_lu_gp_by_name below().
1920                  */
1921                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1922                 if (!(lu_gp_new))
1923                         return -ENODEV;
1924         }
1925         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1926         if (!(lu_gp_mem)) {
1927                 if (lu_gp_new)
1928                         core_alua_put_lu_gp_from_name(lu_gp_new);
1929                 printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
1930                                 " pointer\n");
1931                 return -EINVAL;
1932         }
1933
1934         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1935         lu_gp = lu_gp_mem->lu_gp;
1936         if ((lu_gp)) {
1937                 /*
1938                  * Clearing an existing lu_gp association, and replacing
1939                  * with NULL
1940                  */
1941                 if (!(lu_gp_new)) {
1942                         printk(KERN_INFO "Target_Core_ConfigFS: Releasing %s/%s"
1943                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1944                                 " %hu\n",
1945                                 config_item_name(&hba->hba_group.cg_item),
1946                                 config_item_name(&su_dev->se_dev_group.cg_item),
1947                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1948                                 lu_gp->lu_gp_id);
1949
1950                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1951                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1952
1953                         return count;
1954                 }
1955                 /*
1956                  * Removing existing association of lu_gp_mem with lu_gp
1957                  */
1958                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1959                 move = 1;
1960         }
1961         /*
1962          * Associate lu_gp_mem with lu_gp_new.
1963          */
1964         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1965         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1966
1967         printk(KERN_INFO "Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1968                 " core/alua/lu_gps/%s, ID: %hu\n",
1969                 (move) ? "Moving" : "Adding",
1970                 config_item_name(&hba->hba_group.cg_item),
1971                 config_item_name(&su_dev->se_dev_group.cg_item),
1972                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1973                 lu_gp_new->lu_gp_id);
1974
1975         core_alua_put_lu_gp_from_name(lu_gp_new);
1976         return count;
1977 }
1978
1979 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1980         .attr   = { .ca_owner = THIS_MODULE,
1981                     .ca_name = "alua_lu_gp",
1982                     .ca_mode = S_IRUGO | S_IWUSR },
1983         .show   = target_core_show_alua_lu_gp,
1984         .store  = target_core_store_alua_lu_gp,
1985 };
1986
1987 static struct configfs_attribute *lio_core_dev_attrs[] = {
1988         &target_core_attr_dev_info.attr,
1989         &target_core_attr_dev_control.attr,
1990         &target_core_attr_dev_alias.attr,
1991         &target_core_attr_dev_udev_path.attr,
1992         &target_core_attr_dev_enable.attr,
1993         &target_core_attr_dev_alua_lu_gp.attr,
1994         NULL,
1995 };
1996
1997 static void target_core_dev_release(struct config_item *item)
1998 {
1999         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2000                                 struct se_subsystem_dev, se_dev_group);
2001         struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2002         struct se_subsystem_api *t = hba->transport;
2003         struct config_group *dev_cg = &se_dev->se_dev_group;
2004
2005         kfree(dev_cg->default_groups);
2006         /*
2007          * This pointer will set when the storage is enabled with:
2008          *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2009          */
2010         if (se_dev->se_dev_ptr) {
2011                 printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
2012                         "virtual_device() for se_dev_ptr: %p\n",
2013                         se_dev->se_dev_ptr);
2014
2015                 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2016         } else {
2017                 /*
2018                  * Release struct se_subsystem_dev->se_dev_su_ptr..
2019                  */
2020                 printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
2021                         "device() for se_dev_su_ptr: %p\n",
2022                         se_dev->se_dev_su_ptr);
2023
2024                 t->free_device(se_dev->se_dev_su_ptr);
2025         }
2026
2027         printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
2028                         "_dev_t: %p\n", se_dev);
2029         kfree(se_dev);
2030 }
2031
2032 static ssize_t target_core_dev_show(struct config_item *item,
2033                                      struct configfs_attribute *attr,
2034                                      char *page)
2035 {
2036         struct se_subsystem_dev *se_dev = container_of(
2037                         to_config_group(item), struct se_subsystem_dev,
2038                         se_dev_group);
2039         struct target_core_configfs_attribute *tc_attr = container_of(
2040                         attr, struct target_core_configfs_attribute, attr);
2041
2042         if (!(tc_attr->show))
2043                 return -EINVAL;
2044
2045         return tc_attr->show((void *)se_dev, page);
2046 }
2047
2048 static ssize_t target_core_dev_store(struct config_item *item,
2049                                       struct configfs_attribute *attr,
2050                                       const char *page, size_t count)
2051 {
2052         struct se_subsystem_dev *se_dev = container_of(
2053                         to_config_group(item), struct se_subsystem_dev,
2054                         se_dev_group);
2055         struct target_core_configfs_attribute *tc_attr = container_of(
2056                         attr, struct target_core_configfs_attribute, attr);
2057
2058         if (!(tc_attr->store))
2059                 return -EINVAL;
2060
2061         return tc_attr->store((void *)se_dev, page, count);
2062 }
2063
2064 static struct configfs_item_operations target_core_dev_item_ops = {
2065         .release                = target_core_dev_release,
2066         .show_attribute         = target_core_dev_show,
2067         .store_attribute        = target_core_dev_store,
2068 };
2069
2070 static struct config_item_type target_core_dev_cit = {
2071         .ct_item_ops            = &target_core_dev_item_ops,
2072         .ct_attrs               = lio_core_dev_attrs,
2073         .ct_owner               = THIS_MODULE,
2074 };
2075
2076 /* End functions for struct config_item_type target_core_dev_cit */
2077
2078 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2079
2080 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2081 #define SE_DEV_ALUA_LU_ATTR(_name, _mode)                               \
2082 static struct target_core_alua_lu_gp_attribute                          \
2083                         target_core_alua_lu_gp_##_name =                \
2084         __CONFIGFS_EATTR(_name, _mode,                                  \
2085         target_core_alua_lu_gp_show_attr_##_name,                       \
2086         target_core_alua_lu_gp_store_attr_##_name);
2087
2088 #define SE_DEV_ALUA_LU_ATTR_RO(_name)                                   \
2089 static struct target_core_alua_lu_gp_attribute                          \
2090                         target_core_alua_lu_gp_##_name =                \
2091         __CONFIGFS_EATTR_RO(_name,                                      \
2092         target_core_alua_lu_gp_show_attr_##_name);
2093
2094 /*
2095  * lu_gp_id
2096  */
2097 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2098         struct t10_alua_lu_gp *lu_gp,
2099         char *page)
2100 {
2101         if (!(lu_gp->lu_gp_valid_id))
2102                 return 0;
2103
2104         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2105 }
2106
2107 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2108         struct t10_alua_lu_gp *lu_gp,
2109         const char *page,
2110         size_t count)
2111 {
2112         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2113         unsigned long lu_gp_id;
2114         int ret;
2115
2116         ret = strict_strtoul(page, 0, &lu_gp_id);
2117         if (ret < 0) {
2118                 printk(KERN_ERR "strict_strtoul() returned %d for"
2119                         " lu_gp_id\n", ret);
2120                 return -EINVAL;
2121         }
2122         if (lu_gp_id > 0x0000ffff) {
2123                 printk(KERN_ERR "ALUA lu_gp_id: %lu exceeds maximum:"
2124                         " 0x0000ffff\n", lu_gp_id);
2125                 return -EINVAL;
2126         }
2127
2128         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2129         if (ret < 0)
2130                 return -EINVAL;
2131
2132         printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Logical Unit"
2133                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2134                 config_item_name(&alua_lu_gp_cg->cg_item),
2135                 lu_gp->lu_gp_id);
2136
2137         return count;
2138 }
2139
2140 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2141
2142 /*
2143  * members
2144  */
2145 static ssize_t target_core_alua_lu_gp_show_attr_members(
2146         struct t10_alua_lu_gp *lu_gp,
2147         char *page)
2148 {
2149         struct se_device *dev;
2150         struct se_hba *hba;
2151         struct se_subsystem_dev *su_dev;
2152         struct t10_alua_lu_gp_member *lu_gp_mem;
2153         ssize_t len = 0, cur_len;
2154         unsigned char buf[LU_GROUP_NAME_BUF];
2155
2156         memset(buf, 0, LU_GROUP_NAME_BUF);
2157
2158         spin_lock(&lu_gp->lu_gp_lock);
2159         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2160                 dev = lu_gp_mem->lu_gp_mem_dev;
2161                 su_dev = dev->se_sub_dev;
2162                 hba = su_dev->se_dev_hba;
2163
2164                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2165                         config_item_name(&hba->hba_group.cg_item),
2166                         config_item_name(&su_dev->se_dev_group.cg_item));
2167                 cur_len++; /* Extra byte for NULL terminator */
2168
2169                 if ((cur_len + len) > PAGE_SIZE) {
2170                         printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2171                                 "_members buffer\n");
2172                         break;
2173                 }
2174                 memcpy(page+len, buf, cur_len);
2175                 len += cur_len;
2176         }
2177         spin_unlock(&lu_gp->lu_gp_lock);
2178
2179         return len;
2180 }
2181
2182 SE_DEV_ALUA_LU_ATTR_RO(members);
2183
2184 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2185
2186 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2187         &target_core_alua_lu_gp_lu_gp_id.attr,
2188         &target_core_alua_lu_gp_members.attr,
2189         NULL,
2190 };
2191
2192 static void target_core_alua_lu_gp_release(struct config_item *item)
2193 {
2194         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2195                         struct t10_alua_lu_gp, lu_gp_group);
2196
2197         core_alua_free_lu_gp(lu_gp);
2198 }
2199
2200 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2201         .release                = target_core_alua_lu_gp_release,
2202         .show_attribute         = target_core_alua_lu_gp_attr_show,
2203         .store_attribute        = target_core_alua_lu_gp_attr_store,
2204 };
2205
2206 static struct config_item_type target_core_alua_lu_gp_cit = {
2207         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2208         .ct_attrs               = target_core_alua_lu_gp_attrs,
2209         .ct_owner               = THIS_MODULE,
2210 };
2211
2212 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2213
2214 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2215
2216 static struct config_group *target_core_alua_create_lu_gp(
2217         struct config_group *group,
2218         const char *name)
2219 {
2220         struct t10_alua_lu_gp *lu_gp;
2221         struct config_group *alua_lu_gp_cg = NULL;
2222         struct config_item *alua_lu_gp_ci = NULL;
2223
2224         lu_gp = core_alua_allocate_lu_gp(name, 0);
2225         if (IS_ERR(lu_gp))
2226                 return NULL;
2227
2228         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2229         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2230
2231         config_group_init_type_name(alua_lu_gp_cg, name,
2232                         &target_core_alua_lu_gp_cit);
2233
2234         printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2235                 " Group: core/alua/lu_gps/%s\n",
2236                 config_item_name(alua_lu_gp_ci));
2237
2238         return alua_lu_gp_cg;
2239
2240 }
2241
2242 static void target_core_alua_drop_lu_gp(
2243         struct config_group *group,
2244         struct config_item *item)
2245 {
2246         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2247                         struct t10_alua_lu_gp, lu_gp_group);
2248
2249         printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2250                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2251                 config_item_name(item), lu_gp->lu_gp_id);
2252         /*
2253          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2254          * -> target_core_alua_lu_gp_release()
2255          */
2256         config_item_put(item);
2257 }
2258
2259 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2260         .make_group             = &target_core_alua_create_lu_gp,
2261         .drop_item              = &target_core_alua_drop_lu_gp,
2262 };
2263
2264 static struct config_item_type target_core_alua_lu_gps_cit = {
2265         .ct_item_ops            = NULL,
2266         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2267         .ct_owner               = THIS_MODULE,
2268 };
2269
2270 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2271
2272 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2273
2274 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2275 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode)                            \
2276 static struct target_core_alua_tg_pt_gp_attribute                       \
2277                         target_core_alua_tg_pt_gp_##_name =             \
2278         __CONFIGFS_EATTR(_name, _mode,                                  \
2279         target_core_alua_tg_pt_gp_show_attr_##_name,                    \
2280         target_core_alua_tg_pt_gp_store_attr_##_name);
2281
2282 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name)                                \
2283 static struct target_core_alua_tg_pt_gp_attribute                       \
2284                         target_core_alua_tg_pt_gp_##_name =             \
2285         __CONFIGFS_EATTR_RO(_name,                                      \
2286         target_core_alua_tg_pt_gp_show_attr_##_name);
2287
2288 /*
2289  * alua_access_state
2290  */
2291 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2292         struct t10_alua_tg_pt_gp *tg_pt_gp,
2293         char *page)
2294 {
2295         return sprintf(page, "%d\n",
2296                 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2297 }
2298
2299 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2300         struct t10_alua_tg_pt_gp *tg_pt_gp,
2301         const char *page,
2302         size_t count)
2303 {
2304         struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2305         unsigned long tmp;
2306         int new_state, ret;
2307
2308         if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2309                 printk(KERN_ERR "Unable to do implict ALUA on non valid"
2310                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2311                 return -EINVAL;
2312         }
2313
2314         ret = strict_strtoul(page, 0, &tmp);
2315         if (ret < 0) {
2316                 printk("Unable to extract new ALUA access state from"
2317                                 " %s\n", page);
2318                 return -EINVAL;
2319         }
2320         new_state = (int)tmp;
2321
2322         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2323                 printk(KERN_ERR "Unable to process implict configfs ALUA"
2324                         " transition while TPGS_IMPLICT_ALUA is diabled\n");
2325                 return -EINVAL;
2326         }
2327
2328         ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2329                                         NULL, NULL, new_state, 0);
2330         return (!ret) ? count : -EINVAL;
2331 }
2332
2333 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2334
2335 /*
2336  * alua_access_status
2337  */
2338 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2339         struct t10_alua_tg_pt_gp *tg_pt_gp,
2340         char *page)
2341 {
2342         return sprintf(page, "%s\n",
2343                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2344 }
2345
2346 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2347         struct t10_alua_tg_pt_gp *tg_pt_gp,
2348         const char *page,
2349         size_t count)
2350 {
2351         unsigned long tmp;
2352         int new_status, ret;
2353
2354         if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
2355                 printk(KERN_ERR "Unable to do set ALUA access status on non"
2356                         " valid tg_pt_gp ID: %hu\n",
2357                         tg_pt_gp->tg_pt_gp_valid_id);
2358                 return -EINVAL;
2359         }
2360
2361         ret = strict_strtoul(page, 0, &tmp);
2362         if (ret < 0) {
2363                 printk(KERN_ERR "Unable to extract new ALUA access status"
2364                                 " from %s\n", page);
2365                 return -EINVAL;
2366         }
2367         new_status = (int)tmp;
2368
2369         if ((new_status != ALUA_STATUS_NONE) &&
2370             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2371             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2372                 printk(KERN_ERR "Illegal ALUA access status: 0x%02x\n",
2373                                 new_status);
2374                 return -EINVAL;
2375         }
2376
2377         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2378         return count;
2379 }
2380
2381 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2382
2383 /*
2384  * alua_access_type
2385  */
2386 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2387         struct t10_alua_tg_pt_gp *tg_pt_gp,
2388         char *page)
2389 {
2390         return core_alua_show_access_type(tg_pt_gp, page);
2391 }
2392
2393 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2394         struct t10_alua_tg_pt_gp *tg_pt_gp,
2395         const char *page,
2396         size_t count)
2397 {
2398         return core_alua_store_access_type(tg_pt_gp, page, count);
2399 }
2400
2401 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2402
2403 /*
2404  * alua_write_metadata
2405  */
2406 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2407         struct t10_alua_tg_pt_gp *tg_pt_gp,
2408         char *page)
2409 {
2410         return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2411 }
2412
2413 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2414         struct t10_alua_tg_pt_gp *tg_pt_gp,
2415         const char *page,
2416         size_t count)
2417 {
2418         unsigned long tmp;
2419         int ret;
2420
2421         ret = strict_strtoul(page, 0, &tmp);
2422         if (ret < 0) {
2423                 printk(KERN_ERR "Unable to extract alua_write_metadata\n");
2424                 return -EINVAL;
2425         }
2426
2427         if ((tmp != 0) && (tmp != 1)) {
2428                 printk(KERN_ERR "Illegal value for alua_write_metadata:"
2429                         " %lu\n", tmp);
2430                 return -EINVAL;
2431         }
2432         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2433
2434         return count;
2435 }
2436
2437 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2438
2439
2440
2441 /*
2442  * nonop_delay_msecs
2443  */
2444 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2445         struct t10_alua_tg_pt_gp *tg_pt_gp,
2446         char *page)
2447 {
2448         return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2449
2450 }
2451
2452 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2453         struct t10_alua_tg_pt_gp *tg_pt_gp,
2454         const char *page,
2455         size_t count)
2456 {
2457         return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2458 }
2459
2460 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2461
2462 /*
2463  * trans_delay_msecs
2464  */
2465 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2466         struct t10_alua_tg_pt_gp *tg_pt_gp,
2467         char *page)
2468 {
2469         return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2470 }
2471
2472 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2473         struct t10_alua_tg_pt_gp *tg_pt_gp,
2474         const char *page,
2475         size_t count)
2476 {
2477         return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2478 }
2479
2480 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2481
2482 /*
2483  * preferred
2484  */
2485
2486 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2487         struct t10_alua_tg_pt_gp *tg_pt_gp,
2488         char *page)
2489 {
2490         return core_alua_show_preferred_bit(tg_pt_gp, page);
2491 }
2492
2493 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2494         struct t10_alua_tg_pt_gp *tg_pt_gp,
2495         const char *page,
2496         size_t count)
2497 {
2498         return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2499 }
2500
2501 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2502
2503 /*
2504  * tg_pt_gp_id
2505  */
2506 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2507         struct t10_alua_tg_pt_gp *tg_pt_gp,
2508         char *page)
2509 {
2510         if (!(tg_pt_gp->tg_pt_gp_valid_id))
2511                 return 0;
2512
2513         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2514 }
2515
2516 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2517         struct t10_alua_tg_pt_gp *tg_pt_gp,
2518         const char *page,
2519         size_t count)
2520 {
2521         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2522         unsigned long tg_pt_gp_id;
2523         int ret;
2524
2525         ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2526         if (ret < 0) {
2527                 printk(KERN_ERR "strict_strtoul() returned %d for"
2528                         " tg_pt_gp_id\n", ret);
2529                 return -EINVAL;
2530         }
2531         if (tg_pt_gp_id > 0x0000ffff) {
2532                 printk(KERN_ERR "ALUA tg_pt_gp_id: %lu exceeds maximum:"
2533                         " 0x0000ffff\n", tg_pt_gp_id);
2534                 return -EINVAL;
2535         }
2536
2537         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2538         if (ret < 0)
2539                 return -EINVAL;
2540
2541         printk(KERN_INFO "Target_Core_ConfigFS: Set ALUA Target Port Group: "
2542                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2543                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2544                 tg_pt_gp->tg_pt_gp_id);
2545
2546         return count;
2547 }
2548
2549 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2550
2551 /*
2552  * members
2553  */
2554 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2555         struct t10_alua_tg_pt_gp *tg_pt_gp,
2556         char *page)
2557 {
2558         struct se_port *port;
2559         struct se_portal_group *tpg;
2560         struct se_lun *lun;
2561         struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2562         ssize_t len = 0, cur_len;
2563         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2564
2565         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2566
2567         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2568         list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2569                         tg_pt_gp_mem_list) {
2570                 port = tg_pt_gp_mem->tg_pt;
2571                 tpg = port->sep_tpg;
2572                 lun = port->sep_lun;
2573
2574                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2575                         "/%s\n", TPG_TFO(tpg)->get_fabric_name(),
2576                         TPG_TFO(tpg)->tpg_get_wwn(tpg),
2577                         TPG_TFO(tpg)->tpg_get_tag(tpg),
2578                         config_item_name(&lun->lun_group.cg_item));
2579                 cur_len++; /* Extra byte for NULL terminator */
2580
2581                 if ((cur_len + len) > PAGE_SIZE) {
2582                         printk(KERN_WARNING "Ran out of lu_gp_show_attr"
2583                                 "_members buffer\n");
2584                         break;
2585                 }
2586                 memcpy(page+len, buf, cur_len);
2587                 len += cur_len;
2588         }
2589         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2590
2591         return len;
2592 }
2593
2594 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2595
2596 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2597                         tg_pt_gp_group);
2598
2599 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2600         &target_core_alua_tg_pt_gp_alua_access_state.attr,
2601         &target_core_alua_tg_pt_gp_alua_access_status.attr,
2602         &target_core_alua_tg_pt_gp_alua_access_type.attr,
2603         &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2604         &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2605         &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2606         &target_core_alua_tg_pt_gp_preferred.attr,
2607         &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2608         &target_core_alua_tg_pt_gp_members.attr,
2609         NULL,
2610 };
2611
2612 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2613 {
2614         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2615                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2616
2617         core_alua_free_tg_pt_gp(tg_pt_gp);
2618 }
2619
2620 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2621         .release                = target_core_alua_tg_pt_gp_release,
2622         .show_attribute         = target_core_alua_tg_pt_gp_attr_show,
2623         .store_attribute        = target_core_alua_tg_pt_gp_attr_store,
2624 };
2625
2626 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2627         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2628         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2629         .ct_owner               = THIS_MODULE,
2630 };
2631
2632 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2633
2634 /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2635
2636 static struct config_group *target_core_alua_create_tg_pt_gp(
2637         struct config_group *group,
2638         const char *name)
2639 {
2640         struct t10_alua *alua = container_of(group, struct t10_alua,
2641                                         alua_tg_pt_gps_group);
2642         struct t10_alua_tg_pt_gp *tg_pt_gp;
2643         struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2644         struct config_group *alua_tg_pt_gp_cg = NULL;
2645         struct config_item *alua_tg_pt_gp_ci = NULL;
2646
2647         tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2648         if (!(tg_pt_gp))
2649                 return NULL;
2650
2651         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2652         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2653
2654         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2655                         &target_core_alua_tg_pt_gp_cit);
2656
2657         printk(KERN_INFO "Target_Core_ConfigFS: Allocated ALUA Target Port"
2658                 " Group: alua/tg_pt_gps/%s\n",
2659                 config_item_name(alua_tg_pt_gp_ci));
2660
2661         return alua_tg_pt_gp_cg;
2662 }
2663
2664 static void target_core_alua_drop_tg_pt_gp(
2665         struct config_group *group,
2666         struct config_item *item)
2667 {
2668         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2669                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2670
2671         printk(KERN_INFO "Target_Core_ConfigFS: Releasing ALUA Target Port"
2672                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2673                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2674         /*
2675          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2676          * -> target_core_alua_tg_pt_gp_release().
2677          */
2678         config_item_put(item);
2679 }
2680
2681 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2682         .make_group             = &target_core_alua_create_tg_pt_gp,
2683         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2684 };
2685
2686 static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2687         .ct_group_ops           = &target_core_alua_tg_pt_gps_group_ops,
2688         .ct_owner               = THIS_MODULE,
2689 };
2690
2691 /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2692
2693 /* Start functions for struct config_item_type target_core_alua_cit */
2694
2695 /*
2696  * target_core_alua_cit is a ConfigFS group that lives under
2697  * /sys/kernel/config/target/core/alua.  There are default groups
2698  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2699  * target_core_alua_cit in target_core_init_configfs() below.
2700  */
2701 static struct config_item_type target_core_alua_cit = {
2702         .ct_item_ops            = NULL,
2703         .ct_attrs               = NULL,
2704         .ct_owner               = THIS_MODULE,
2705 };
2706
2707 /* End functions for struct config_item_type target_core_alua_cit */
2708
2709 /* Start functions for struct config_item_type target_core_stat_cit */
2710
2711 static struct config_group *target_core_stat_mkdir(
2712         struct config_group *group,
2713         const char *name)
2714 {
2715         return ERR_PTR(-ENOSYS);
2716 }
2717
2718 static void target_core_stat_rmdir(
2719         struct config_group *group,
2720         struct config_item *item)
2721 {
2722         return;
2723 }
2724
2725 static struct configfs_group_operations target_core_stat_group_ops = {
2726         .make_group             = &target_core_stat_mkdir,
2727         .drop_item              = &target_core_stat_rmdir,
2728 };
2729
2730 static struct config_item_type target_core_stat_cit = {
2731         .ct_group_ops           = &target_core_stat_group_ops,
2732         .ct_owner               = THIS_MODULE,
2733 };
2734
2735 /* End functions for struct config_item_type target_core_stat_cit */
2736
2737 /* Start functions for struct config_item_type target_core_hba_cit */
2738
2739 static struct config_group *target_core_make_subdev(
2740         struct config_group *group,
2741         const char *name)
2742 {
2743         struct t10_alua_tg_pt_gp *tg_pt_gp;
2744         struct se_subsystem_dev *se_dev;
2745         struct se_subsystem_api *t;
2746         struct config_item *hba_ci = &group->cg_item;
2747         struct se_hba *hba = item_to_hba(hba_ci);
2748         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2749         struct config_group *dev_stat_grp = NULL;
2750         int errno = -ENOMEM, ret;
2751
2752         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2753         if (ret)
2754                 return ERR_PTR(ret);
2755         /*
2756          * Locate the struct se_subsystem_api from parent's struct se_hba.
2757          */
2758         t = hba->transport;
2759
2760         se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2761         if (!se_dev) {
2762                 printk(KERN_ERR "Unable to allocate memory for"
2763                                 " struct se_subsystem_dev\n");
2764                 goto unlock;
2765         }
2766         INIT_LIST_HEAD(&se_dev->g_se_dev_list);
2767         INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2768         spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2769         INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
2770         INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
2771         spin_lock_init(&se_dev->t10_reservation.registration_lock);
2772         spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
2773         INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2774         spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2775         spin_lock_init(&se_dev->se_dev_lock);
2776         se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2777         se_dev->t10_wwn.t10_sub_dev = se_dev;
2778         se_dev->t10_alua.t10_sub_dev = se_dev;
2779         se_dev->se_dev_attrib.da_sub_dev = se_dev;
2780
2781         se_dev->se_dev_hba = hba;
2782         dev_cg = &se_dev->se_dev_group;
2783
2784         dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2785                         GFP_KERNEL);
2786         if (!(dev_cg->default_groups))
2787                 goto out;
2788         /*
2789          * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2790          * for ->allocate_virtdevice()
2791          *
2792          * se_dev->se_dev_ptr will be set after ->create_virtdev()
2793          * has been called successfully in the next level up in the
2794          * configfs tree for device object's struct config_group.
2795          */
2796         se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2797         if (!(se_dev->se_dev_su_ptr)) {
2798                 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
2799                         " from allocate_virtdevice()\n");
2800                 goto out;
2801         }
2802         spin_lock(&se_global->g_device_lock);
2803         list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
2804         spin_unlock(&se_global->g_device_lock);
2805
2806         config_group_init_type_name(&se_dev->se_dev_group, name,
2807                         &target_core_dev_cit);
2808         config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2809                         &target_core_dev_attrib_cit);
2810         config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2811                         &target_core_dev_pr_cit);
2812         config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2813                         &target_core_dev_wwn_cit);
2814         config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2815                         "alua", &target_core_alua_tg_pt_gps_cit);
2816         config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2817                         "statistics", &target_core_stat_cit);
2818
2819         dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2820         dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2821         dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2822         dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2823         dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2824         dev_cg->default_groups[5] = NULL;
2825         /*
2826          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2827          */
2828         tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2829         if (!(tg_pt_gp))
2830                 goto out;
2831
2832         tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2833         tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2834                                 GFP_KERNEL);
2835         if (!(tg_pt_gp_cg->default_groups)) {
2836                 printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
2837                                 "default_groups\n");
2838                 goto out;
2839         }
2840
2841         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2842                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2843         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2844         tg_pt_gp_cg->default_groups[1] = NULL;
2845         T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
2846         /*
2847          * Add core/$HBA/$DEV/statistics/ default groups
2848          */
2849         dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2850         dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2851                                 GFP_KERNEL);
2852         if (!dev_stat_grp->default_groups) {
2853                 printk(KERN_ERR "Unable to allocate dev_stat_grp->default_groups\n");
2854                 goto out;
2855         }
2856         target_stat_setup_dev_default_groups(se_dev);
2857
2858         printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2859                 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2860
2861         mutex_unlock(&hba->hba_access_mutex);
2862         return &se_dev->se_dev_group;
2863 out:
2864         if (T10_ALUA(se_dev)->default_tg_pt_gp) {
2865                 core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
2866                 T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2867         }
2868         if (dev_stat_grp)
2869                 kfree(dev_stat_grp->default_groups);
2870         if (tg_pt_gp_cg)
2871                 kfree(tg_pt_gp_cg->default_groups);
2872         if (dev_cg)
2873                 kfree(dev_cg->default_groups);
2874         if (se_dev->se_dev_su_ptr)
2875                 t->free_device(se_dev->se_dev_su_ptr);
2876         kfree(se_dev);
2877 unlock:
2878         mutex_unlock(&hba->hba_access_mutex);
2879         return ERR_PTR(errno);
2880 }
2881
2882 static void target_core_drop_subdev(
2883         struct config_group *group,
2884         struct config_item *item)
2885 {
2886         struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2887                                 struct se_subsystem_dev, se_dev_group);
2888         struct se_hba *hba;
2889         struct se_subsystem_api *t;
2890         struct config_item *df_item;
2891         struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2892         int i;
2893
2894         hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2895
2896         mutex_lock(&hba->hba_access_mutex);
2897         t = hba->transport;
2898
2899         spin_lock(&se_global->g_device_lock);
2900         list_del(&se_dev->g_se_dev_list);
2901         spin_unlock(&se_global->g_device_lock);
2902
2903         dev_stat_grp = &DEV_STAT_GRP(se_dev)->stat_group;
2904         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2905                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2906                 dev_stat_grp->default_groups[i] = NULL;
2907                 config_item_put(df_item);
2908         }
2909         kfree(dev_stat_grp->default_groups);
2910
2911         tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
2912         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2913                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2914                 tg_pt_gp_cg->default_groups[i] = NULL;
2915                 config_item_put(df_item);
2916         }
2917         kfree(tg_pt_gp_cg->default_groups);
2918         /*
2919          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2920          * directly from target_core_alua_tg_pt_gp_release().
2921          */
2922         T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
2923
2924         dev_cg = &se_dev->se_dev_group;
2925         for (i = 0; dev_cg->default_groups[i]; i++) {
2926                 df_item = &dev_cg->default_groups[i]->cg_item;
2927                 dev_cg->default_groups[i] = NULL;
2928                 config_item_put(df_item);
2929         }
2930         /*
2931          * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2932          * from target_core_dev_item_ops->release() ->target_core_dev_release().
2933          */
2934         config_item_put(item);
2935         mutex_unlock(&hba->hba_access_mutex);
2936 }
2937
2938 static struct configfs_group_operations target_core_hba_group_ops = {
2939         .make_group             = target_core_make_subdev,
2940         .drop_item              = target_core_drop_subdev,
2941 };
2942
2943 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2944 #define SE_HBA_ATTR(_name, _mode)                               \
2945 static struct target_core_hba_attribute                         \
2946                 target_core_hba_##_name =                       \
2947                 __CONFIGFS_EATTR(_name, _mode,                  \
2948                 target_core_hba_show_attr_##_name,              \
2949                 target_core_hba_store_attr_##_name);
2950
2951 #define SE_HBA_ATTR_RO(_name)                                   \
2952 static struct target_core_hba_attribute                         \
2953                 target_core_hba_##_name =                       \
2954                 __CONFIGFS_EATTR_RO(_name,                      \
2955                 target_core_hba_show_attr_##_name);
2956
2957 static ssize_t target_core_hba_show_attr_hba_info(
2958         struct se_hba *hba,
2959         char *page)
2960 {
2961         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2962                         hba->hba_id, hba->transport->name,
2963                         TARGET_CORE_CONFIGFS_VERSION);
2964 }
2965
2966 SE_HBA_ATTR_RO(hba_info);
2967
2968 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2969                                 char *page)
2970 {
2971         int hba_mode = 0;
2972
2973         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2974                 hba_mode = 1;
2975
2976         return sprintf(page, "%d\n", hba_mode);
2977 }
2978
2979 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2980                                 const char *page, size_t count)
2981 {
2982         struct se_subsystem_api *transport = hba->transport;
2983         unsigned long mode_flag;
2984         int ret;
2985
2986         if (transport->pmode_enable_hba == NULL)
2987                 return -EINVAL;
2988
2989         ret = strict_strtoul(page, 0, &mode_flag);
2990         if (ret < 0) {
2991                 printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
2992                 return -EINVAL;
2993         }
2994
2995         spin_lock(&hba->device_lock);
2996         if (!(list_empty(&hba->hba_dev_list))) {
2997                 printk(KERN_ERR "Unable to set hba_mode with active devices\n");
2998                 spin_unlock(&hba->device_lock);
2999                 return -EINVAL;
3000         }
3001         spin_unlock(&hba->device_lock);
3002
3003         ret = transport->pmode_enable_hba(hba, mode_flag);
3004         if (ret < 0)
3005                 return -EINVAL;
3006         if (ret > 0)
3007                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3008         else if (ret == 0)
3009                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3010
3011         return count;
3012 }
3013
3014 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3015
3016 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3017
3018 static void target_core_hba_release(struct config_item *item)
3019 {
3020         struct se_hba *hba = container_of(to_config_group(item),
3021                                 struct se_hba, hba_group);
3022         core_delete_hba(hba);
3023 }
3024
3025 static struct configfs_attribute *target_core_hba_attrs[] = {
3026         &target_core_hba_hba_info.attr,
3027         &target_core_hba_hba_mode.attr,
3028         NULL,
3029 };
3030
3031 static struct configfs_item_operations target_core_hba_item_ops = {
3032         .release                = target_core_hba_release,
3033         .show_attribute         = target_core_hba_attr_show,
3034         .store_attribute        = target_core_hba_attr_store,
3035 };
3036
3037 static struct config_item_type target_core_hba_cit = {
3038         .ct_item_ops            = &target_core_hba_item_ops,
3039         .ct_group_ops           = &target_core_hba_group_ops,
3040         .ct_attrs               = target_core_hba_attrs,
3041         .ct_owner               = THIS_MODULE,
3042 };
3043
3044 static struct config_group *target_core_call_addhbatotarget(
3045         struct config_group *group,
3046         const char *name)
3047 {
3048         char *se_plugin_str, *str, *str2;
3049         struct se_hba *hba;
3050         char buf[TARGET_CORE_NAME_MAX_LEN];
3051         unsigned long plugin_dep_id = 0;
3052         int ret;
3053
3054         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3055         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3056                 printk(KERN_ERR "Passed *name strlen(): %d exceeds"
3057                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3058                         TARGET_CORE_NAME_MAX_LEN);
3059                 return ERR_PTR(-ENAMETOOLONG);
3060         }
3061         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3062
3063         str = strstr(buf, "_");
3064         if (!(str)) {
3065                 printk(KERN_ERR "Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3066                 return ERR_PTR(-EINVAL);
3067         }
3068         se_plugin_str = buf;
3069         /*
3070          * Special case for subsystem plugins that have "_" in their names.
3071          * Namely rd_direct and rd_mcp..
3072          */
3073         str2 = strstr(str+1, "_");
3074         if ((str2)) {
3075                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3076                 str2++; /* Skip to start of plugin dependent ID */
3077                 str = str2;
3078         } else {
3079                 *str = '\0'; /* Terminate for *se_plugin_str */
3080                 str++; /* Skip to start of plugin dependent ID */
3081         }
3082
3083         ret = strict_strtoul(str, 0, &plugin_dep_id);
3084         if (ret < 0) {
3085                 printk(KERN_ERR "strict_strtoul() returned %d for"
3086                                 " plugin_dep_id\n", ret);
3087                 return ERR_PTR(-EINVAL);
3088         }
3089         /*
3090          * Load up TCM subsystem plugins if they have not already been loaded.
3091          */
3092         if (transport_subsystem_check_init() < 0)
3093                 return ERR_PTR(-EINVAL);
3094
3095         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3096         if (IS_ERR(hba))
3097                 return ERR_CAST(hba);
3098
3099         config_group_init_type_name(&hba->hba_group, name,
3100                         &target_core_hba_cit);
3101
3102         return &hba->hba_group;
3103 }
3104
3105 static void target_core_call_delhbafromtarget(
3106         struct config_group *group,
3107         struct config_item *item)
3108 {
3109         /*
3110          * core_delete_hba() is called from target_core_hba_item_ops->release()
3111          * -> target_core_hba_release()
3112          */
3113         config_item_put(item);
3114 }
3115
3116 static struct configfs_group_operations target_core_group_ops = {
3117         .make_group     = target_core_call_addhbatotarget,
3118         .drop_item      = target_core_call_delhbafromtarget,
3119 };
3120
3121 static struct config_item_type target_core_cit = {
3122         .ct_item_ops    = NULL,
3123         .ct_group_ops   = &target_core_group_ops,
3124         .ct_attrs       = NULL,
3125         .ct_owner       = THIS_MODULE,
3126 };
3127
3128 /* Stop functions for struct config_item_type target_core_hba_cit */
3129
3130 static int __init target_core_init_configfs(void)
3131 {
3132         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3133         struct config_group *lu_gp_cg = NULL;
3134         struct configfs_subsystem *subsys;
3135         struct t10_alua_lu_gp *lu_gp;
3136         int ret;
3137
3138         printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
3139                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3140                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3141
3142         subsys = target_core_subsystem[0];
3143         config_group_init(&subsys->su_group);
3144         mutex_init(&subsys->su_mutex);
3145
3146         INIT_LIST_HEAD(&g_tf_list);
3147         mutex_init(&g_tf_lock);
3148         init_scsi_index_table();
3149         ret = init_se_global();
3150         if (ret < 0)
3151                 return -1;
3152         /*
3153          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3154          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3155          */
3156         target_cg = &subsys->su_group;
3157         target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3158                                 GFP_KERNEL);
3159         if (!(target_cg->default_groups)) {
3160                 printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
3161                 goto out_global;
3162         }
3163
3164         config_group_init_type_name(&se_global->target_core_hbagroup,
3165                         "core", &target_core_cit);
3166         target_cg->default_groups[0] = &se_global->target_core_hbagroup;
3167         target_cg->default_groups[1] = NULL;
3168         /*
3169          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3170          */
3171         hba_cg = &se_global->target_core_hbagroup;
3172         hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3173                                 GFP_KERNEL);
3174         if (!(hba_cg->default_groups)) {
3175                 printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
3176                 goto out_global;
3177         }
3178         config_group_init_type_name(&se_global->alua_group,
3179                         "alua", &target_core_alua_cit);
3180         hba_cg->default_groups[0] = &se_global->alua_group;
3181         hba_cg->default_groups[1] = NULL;
3182         /*
3183          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3184          * groups under /sys/kernel/config/target/core/alua/
3185          */
3186         alua_cg = &se_global->alua_group;
3187         alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3188                         GFP_KERNEL);
3189         if (!(alua_cg->default_groups)) {
3190                 printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
3191                 goto out_global;
3192         }
3193
3194         config_group_init_type_name(&se_global->alua_lu_gps_group,
3195                         "lu_gps", &target_core_alua_lu_gps_cit);
3196         alua_cg->default_groups[0] = &se_global->alua_lu_gps_group;
3197         alua_cg->default_groups[1] = NULL;
3198         /*
3199          * Add core/alua/lu_gps/default_lu_gp
3200          */
3201         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3202         if (IS_ERR(lu_gp))
3203                 goto out_global;
3204
3205         lu_gp_cg = &se_global->alua_lu_gps_group;
3206         lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3207                         GFP_KERNEL);
3208         if (!(lu_gp_cg->default_groups)) {
3209                 printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
3210                 goto out_global;
3211         }
3212
3213         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3214                                 &target_core_alua_lu_gp_cit);
3215         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3216         lu_gp_cg->default_groups[1] = NULL;
3217         se_global->default_lu_gp = lu_gp;
3218         /*
3219          * Register the target_core_mod subsystem with configfs.
3220          */
3221         ret = configfs_register_subsystem(subsys);
3222         if (ret < 0) {
3223                 printk(KERN_ERR "Error %d while registering subsystem %s\n",
3224                         ret, subsys->su_group.cg_item.ci_namebuf);
3225                 goto out_global;
3226         }
3227         printk(KERN_INFO "TARGET_CORE[0]: Initialized ConfigFS Fabric"
3228                 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3229                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3230         /*
3231          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3232          */
3233         ret = rd_module_init();
3234         if (ret < 0)
3235                 goto out;
3236
3237         if (core_dev_setup_virtual_lun0() < 0)
3238                 goto out;
3239
3240         return 0;
3241
3242 out:
3243         configfs_unregister_subsystem(subsys);
3244         core_dev_release_virtual_lun0();
3245         rd_module_exit();
3246 out_global:
3247         if (se_global->default_lu_gp) {
3248                 core_alua_free_lu_gp(se_global->default_lu_gp);
3249                 se_global->default_lu_gp = NULL;
3250         }
3251         if (lu_gp_cg)
3252                 kfree(lu_gp_cg->default_groups);
3253         if (alua_cg)
3254                 kfree(alua_cg->default_groups);
3255         if (hba_cg)
3256                 kfree(hba_cg->default_groups);
3257         kfree(target_cg->default_groups);
3258         release_se_global();
3259         return -1;
3260 }
3261
3262 static void __exit target_core_exit_configfs(void)
3263 {
3264         struct configfs_subsystem *subsys;
3265         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3266         struct config_item *item;
3267         int i;
3268
3269         se_global->in_shutdown = 1;
3270         subsys = target_core_subsystem[0];
3271
3272         lu_gp_cg = &se_global->alua_lu_gps_group;
3273         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3274                 item = &lu_gp_cg->default_groups[i]->cg_item;
3275                 lu_gp_cg->default_groups[i] = NULL;
3276                 config_item_put(item);
3277         }
3278         kfree(lu_gp_cg->default_groups);
3279         lu_gp_cg->default_groups = NULL;
3280
3281         alua_cg = &se_global->alua_group;
3282         for (i = 0; alua_cg->default_groups[i]; i++) {
3283                 item = &alua_cg->default_groups[i]->cg_item;
3284                 alua_cg->default_groups[i] = NULL;
3285                 config_item_put(item);
3286         }
3287         kfree(alua_cg->default_groups);
3288         alua_cg->default_groups = NULL;
3289
3290         hba_cg = &se_global->target_core_hbagroup;
3291         for (i = 0; hba_cg->default_groups[i]; i++) {
3292                 item = &hba_cg->default_groups[i]->cg_item;
3293                 hba_cg->default_groups[i] = NULL;
3294                 config_item_put(item);
3295         }
3296         kfree(hba_cg->default_groups);
3297         hba_cg->default_groups = NULL;
3298         /*
3299          * We expect subsys->su_group.default_groups to be released
3300          * by configfs subsystem provider logic..
3301          */
3302         configfs_unregister_subsystem(subsys);
3303         kfree(subsys->su_group.default_groups);
3304
3305         core_alua_free_lu_gp(se_global->default_lu_gp);
3306         se_global->default_lu_gp = NULL;
3307
3308         printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
3309                         " Infrastructure\n");
3310
3311         core_dev_release_virtual_lun0();
3312         rd_module_exit();
3313         release_se_global();
3314
3315         return;
3316 }
3317
3318 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3319 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3320 MODULE_LICENSE("GPL");
3321
3322 module_init(target_core_init_configfs);
3323 module_exit(target_core_exit_configfs);