[SCSI] target: update version to v4.0.0-rc7-ml
[linux-3.10.git] / drivers / target / target_core_fabric_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_fabric_configfs.c
3  *
4  * This file contains generic fabric module configfs infrastructure for
5  * TCM v4.x code
6  *
7  * Copyright (c) 2010 Rising Tide Systems
8  * Copyright (c) 2010 Linux-iSCSI.org
9  *
10  * Copyright (c) 2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
11 *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  ****************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/version.h>
26 #include <generated/utsrelease.h>
27 #include <linux/utsname.h>
28 #include <linux/init.h>
29 #include <linux/fs.h>
30 #include <linux/namei.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/delay.h>
34 #include <linux/unistd.h>
35 #include <linux/string.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38
39 #include <target/target_core_base.h>
40 #include <target/target_core_device.h>
41 #include <target/target_core_tpg.h>
42 #include <target/target_core_transport.h>
43 #include <target/target_core_fabric_ops.h>
44 #include <target/target_core_fabric_configfs.h>
45 #include <target/target_core_configfs.h>
46 #include <target/configfs_macros.h>
47
48 #include "target_core_alua.h"
49 #include "target_core_hba.h"
50 #include "target_core_pr.h"
51
52 #define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
53 static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
54 {                                                                       \
55         struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
56         struct config_item_type *cit = &tfc->tfc_##_name##_cit;         \
57                                                                         \
58         cit->ct_item_ops = _item_ops;                                   \
59         cit->ct_group_ops = _group_ops;                                 \
60         cit->ct_attrs = _attrs;                                         \
61         cit->ct_owner = tf->tf_module;                                  \
62         printk("Setup generic %s\n", __stringify(_name));               \
63 }
64
65 /* Start of tfc_tpg_mappedlun_cit */
66
67 static int target_fabric_mappedlun_link(
68         struct config_item *lun_acl_ci,
69         struct config_item *lun_ci)
70 {
71         struct se_dev_entry *deve;
72         struct se_lun *lun = container_of(to_config_group(lun_ci),
73                         struct se_lun, lun_group);
74         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
75                         struct se_lun_acl, se_lun_group);
76         struct se_portal_group *se_tpg;
77         struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
78         int ret = 0, lun_access;
79         /*
80          * Ensure that the source port exists
81          */
82         if (!(lun->lun_sep) || !(lun->lun_sep->sep_tpg)) {
83                 printk(KERN_ERR "Source se_lun->lun_sep or lun->lun_sep->sep"
84                                 "_tpg does not exist\n");
85                 return -EINVAL;
86         }
87         se_tpg = lun->lun_sep->sep_tpg;
88
89         nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
90         tpg_ci = &nacl_ci->ci_group->cg_item;
91         wwn_ci = &tpg_ci->ci_group->cg_item;
92         tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
93         wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
94         /*
95          * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
96          */
97         if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
98                 printk(KERN_ERR "Illegal Initiator ACL SymLink outside of %s\n",
99                         config_item_name(wwn_ci));
100                 return -EINVAL;
101         }
102         if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
103                 printk(KERN_ERR "Illegal Initiator ACL Symlink outside of %s"
104                         " TPGT: %s\n", config_item_name(wwn_ci),
105                         config_item_name(tpg_ci));
106                 return -EINVAL;
107         }
108         /*
109          * If this struct se_node_acl was dynamically generated with
110          * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
111          * which be will write protected (READ-ONLY) when
112          * tpg_1/attrib/demo_mode_write_protect=1
113          */
114         spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
115         deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
116         if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
117                 lun_access = deve->lun_flags;
118         else
119                 lun_access =
120                         (TPG_TFO(se_tpg)->tpg_check_prod_mode_write_protect(
121                                 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
122                                            TRANSPORT_LUNFLAGS_READ_WRITE;
123         spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
124         /*
125          * Determine the actual mapped LUN value user wants..
126          *
127          * This value is what the SCSI Initiator actually sees the
128          * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
129          */
130         ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
131                         lun->unpacked_lun, lun_access);
132
133         return (ret < 0) ? -EINVAL : 0;
134 }
135
136 static int target_fabric_mappedlun_unlink(
137         struct config_item *lun_acl_ci,
138         struct config_item *lun_ci)
139 {
140         struct se_lun *lun;
141         struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
142                         struct se_lun_acl, se_lun_group);
143         struct se_node_acl *nacl = lacl->se_lun_nacl;
144         struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun];
145         struct se_portal_group *se_tpg;
146         /*
147          * Determine if the underlying MappedLUN has already been released..
148          */
149         if (!(deve->se_lun))
150                 return 0;
151
152         lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
153         se_tpg = lun->lun_sep->sep_tpg;
154
155         core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
156         return 0;
157 }
158
159 CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
160 #define TCM_MAPPEDLUN_ATTR(_name, _mode)                                \
161 static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
162         __CONFIGFS_EATTR(_name, _mode,                                  \
163         target_fabric_mappedlun_show_##_name,                           \
164         target_fabric_mappedlun_store_##_name);
165
166 static ssize_t target_fabric_mappedlun_show_write_protect(
167         struct se_lun_acl *lacl,
168         char *page)
169 {
170         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
171         struct se_dev_entry *deve;
172         ssize_t len;
173
174         spin_lock_irq(&se_nacl->device_list_lock);
175         deve = &se_nacl->device_list[lacl->mapped_lun];
176         len = sprintf(page, "%d\n",
177                         (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
178                         1 : 0);
179         spin_unlock_irq(&se_nacl->device_list_lock);
180
181         return len;
182 }
183
184 static ssize_t target_fabric_mappedlun_store_write_protect(
185         struct se_lun_acl *lacl,
186         const char *page,
187         size_t count)
188 {
189         struct se_node_acl *se_nacl = lacl->se_lun_nacl;
190         struct se_portal_group *se_tpg = se_nacl->se_tpg;
191         unsigned long op;
192
193         if (strict_strtoul(page, 0, &op))
194                 return -EINVAL;
195
196         if ((op != 1) && (op != 0))
197                 return -EINVAL;
198
199         core_update_device_list_access(lacl->mapped_lun, (op) ?
200                         TRANSPORT_LUNFLAGS_READ_ONLY :
201                         TRANSPORT_LUNFLAGS_READ_WRITE,
202                         lacl->se_lun_nacl);
203
204         printk(KERN_INFO "%s_ConfigFS: Changed Initiator ACL: %s"
205                 " Mapped LUN: %u Write Protect bit to %s\n",
206                 TPG_TFO(se_tpg)->get_fabric_name(),
207                 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
208
209         return count;
210
211 }
212
213 TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
214
215 CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
216
217 static void target_fabric_mappedlun_release(struct config_item *item)
218 {
219         struct se_lun_acl *lacl = container_of(to_config_group(item),
220                                 struct se_lun_acl, se_lun_group);
221         struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
222
223         core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
224 }
225
226 static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
227         &target_fabric_mappedlun_write_protect.attr,
228         NULL,
229 };
230
231 static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
232         .release                = target_fabric_mappedlun_release,
233         .show_attribute         = target_fabric_mappedlun_attr_show,
234         .store_attribute        = target_fabric_mappedlun_attr_store,
235         .allow_link             = target_fabric_mappedlun_link,
236         .drop_link              = target_fabric_mappedlun_unlink,
237 };
238
239 TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
240                 target_fabric_mappedlun_attrs);
241
242 /* End of tfc_tpg_mappedlun_cit */
243
244 /* Start of tfc_tpg_nacl_attrib_cit */
245
246 CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
247
248 static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
249         .show_attribute         = target_fabric_nacl_attrib_attr_show,
250         .store_attribute        = target_fabric_nacl_attrib_attr_store,
251 };
252
253 TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
254
255 /* End of tfc_tpg_nacl_attrib_cit */
256
257 /* Start of tfc_tpg_nacl_auth_cit */
258
259 CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
260
261 static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
262         .show_attribute         = target_fabric_nacl_auth_attr_show,
263         .store_attribute        = target_fabric_nacl_auth_attr_store,
264 };
265
266 TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
267
268 /* End of tfc_tpg_nacl_auth_cit */
269
270 /* Start of tfc_tpg_nacl_param_cit */
271
272 CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
273
274 static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
275         .show_attribute         = target_fabric_nacl_param_attr_show,
276         .store_attribute        = target_fabric_nacl_param_attr_store,
277 };
278
279 TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
280
281 /* End of tfc_tpg_nacl_param_cit */
282
283 /* Start of tfc_tpg_nacl_base_cit */
284
285 CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
286
287 static struct config_group *target_fabric_make_mappedlun(
288         struct config_group *group,
289         const char *name)
290 {
291         struct se_node_acl *se_nacl = container_of(group,
292                         struct se_node_acl, acl_group);
293         struct se_portal_group *se_tpg = se_nacl->se_tpg;
294         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
295         struct se_lun_acl *lacl;
296         struct config_item *acl_ci;
297         char *buf;
298         unsigned long mapped_lun;
299         int ret = 0;
300
301         acl_ci = &group->cg_item;
302         if (!(acl_ci)) {
303                 printk(KERN_ERR "Unable to locatel acl_ci\n");
304                 return NULL;
305         }
306
307         buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
308         if (!(buf)) {
309                 printk(KERN_ERR "Unable to allocate memory for name buf\n");
310                 return ERR_PTR(-ENOMEM);
311         }
312         snprintf(buf, strlen(name) + 1, "%s", name);
313         /*
314          * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
315          */
316         if (strstr(buf, "lun_") != buf) {
317                 printk(KERN_ERR "Unable to locate \"lun_\" from buf: %s"
318                         " name: %s\n", buf, name);
319                 ret = -EINVAL;
320                 goto out;
321         }
322         /*
323          * Determine the Mapped LUN value.  This is what the SCSI Initiator
324          * Port will actually see.
325          */
326         if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
327                 ret = -EINVAL;
328                 goto out;
329         }
330
331         lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
332                         config_item_name(acl_ci), &ret);
333         if (!(lacl))
334                 goto out;
335
336         config_group_init_type_name(&lacl->se_lun_group, name,
337                         &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
338
339         kfree(buf);
340         return &lacl->se_lun_group;
341 out:
342         kfree(buf);
343         return ERR_PTR(ret);
344 }
345
346 static void target_fabric_drop_mappedlun(
347         struct config_group *group,
348         struct config_item *item)
349 {
350         config_item_put(item);
351 }
352
353 static void target_fabric_nacl_base_release(struct config_item *item)
354 {
355         struct se_node_acl *se_nacl = container_of(to_config_group(item),
356                         struct se_node_acl, acl_group);
357         struct se_portal_group *se_tpg = se_nacl->se_tpg;
358         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
359
360         tf->tf_ops.fabric_drop_nodeacl(se_nacl);
361 }
362
363 static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
364         .release                = target_fabric_nacl_base_release,
365         .show_attribute         = target_fabric_nacl_base_attr_show,
366         .store_attribute        = target_fabric_nacl_base_attr_store,
367 };
368
369 static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
370         .make_group             = target_fabric_make_mappedlun,
371         .drop_item              = target_fabric_drop_mappedlun,
372 };
373
374 TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
375                 &target_fabric_nacl_base_group_ops, NULL);
376
377 /* End of tfc_tpg_nacl_base_cit */
378
379 /* Start of tfc_tpg_nacl_cit */
380
381 static struct config_group *target_fabric_make_nodeacl(
382         struct config_group *group,
383         const char *name)
384 {
385         struct se_portal_group *se_tpg = container_of(group,
386                         struct se_portal_group, tpg_acl_group);
387         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
388         struct se_node_acl *se_nacl;
389         struct config_group *nacl_cg;
390
391         if (!(tf->tf_ops.fabric_make_nodeacl)) {
392                 printk(KERN_ERR "tf->tf_ops.fabric_make_nodeacl is NULL\n");
393                 return ERR_PTR(-ENOSYS);
394         }
395
396         se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
397         if (IS_ERR(se_nacl))
398                 return ERR_PTR(PTR_ERR(se_nacl));
399
400         nacl_cg = &se_nacl->acl_group;
401         nacl_cg->default_groups = se_nacl->acl_default_groups;
402         nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
403         nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
404         nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
405         nacl_cg->default_groups[3] = NULL;
406
407         config_group_init_type_name(&se_nacl->acl_group, name,
408                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
409         config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
410                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
411         config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
412                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
413         config_group_init_type_name(&se_nacl->acl_param_group, "param",
414                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
415
416         return &se_nacl->acl_group;
417 }
418
419 static void target_fabric_drop_nodeacl(
420         struct config_group *group,
421         struct config_item *item)
422 {
423         struct se_node_acl *se_nacl = container_of(to_config_group(item),
424                         struct se_node_acl, acl_group);
425         struct config_item *df_item;
426         struct config_group *nacl_cg;
427         int i;
428
429         nacl_cg = &se_nacl->acl_group;
430         for (i = 0; nacl_cg->default_groups[i]; i++) {
431                 df_item = &nacl_cg->default_groups[i]->cg_item;
432                 nacl_cg->default_groups[i] = NULL;
433                 config_item_put(df_item);
434         }
435         /*
436          * struct se_node_acl free is done in target_fabric_nacl_base_release()
437          */
438         config_item_put(item);
439 }
440
441 static struct configfs_group_operations target_fabric_nacl_group_ops = {
442         .make_group     = target_fabric_make_nodeacl,
443         .drop_item      = target_fabric_drop_nodeacl,
444 };
445
446 TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
447
448 /* End of tfc_tpg_nacl_cit */
449
450 /* Start of tfc_tpg_np_base_cit */
451
452 CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
453
454 static void target_fabric_np_base_release(struct config_item *item)
455 {
456         struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
457                                 struct se_tpg_np, tpg_np_group);
458         struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
459         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
460
461         tf->tf_ops.fabric_drop_np(se_tpg_np);
462 }
463
464 static struct configfs_item_operations target_fabric_np_base_item_ops = {
465         .release                = target_fabric_np_base_release,
466         .show_attribute         = target_fabric_np_base_attr_show,
467         .store_attribute        = target_fabric_np_base_attr_store,
468 };
469
470 TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
471
472 /* End of tfc_tpg_np_base_cit */
473
474 /* Start of tfc_tpg_np_cit */
475
476 static struct config_group *target_fabric_make_np(
477         struct config_group *group,
478         const char *name)
479 {
480         struct se_portal_group *se_tpg = container_of(group,
481                                 struct se_portal_group, tpg_np_group);
482         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
483         struct se_tpg_np *se_tpg_np;
484
485         if (!(tf->tf_ops.fabric_make_np)) {
486                 printk(KERN_ERR "tf->tf_ops.fabric_make_np is NULL\n");
487                 return ERR_PTR(-ENOSYS);
488         }
489
490         se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
491         if (!(se_tpg_np) || IS_ERR(se_tpg_np))
492                 return ERR_PTR(-EINVAL);
493
494         se_tpg_np->tpg_np_parent = se_tpg;
495         config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
496                         &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
497
498         return &se_tpg_np->tpg_np_group;
499 }
500
501 static void target_fabric_drop_np(
502         struct config_group *group,
503         struct config_item *item)
504 {
505         /*
506          * struct se_tpg_np is released via target_fabric_np_base_release()
507          */
508         config_item_put(item);
509 }
510
511 static struct configfs_group_operations target_fabric_np_group_ops = {
512         .make_group     = &target_fabric_make_np,
513         .drop_item      = &target_fabric_drop_np,
514 };
515
516 TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
517
518 /* End of tfc_tpg_np_cit */
519
520 /* Start of tfc_tpg_port_cit */
521
522 CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
523 #define TCM_PORT_ATTR(_name, _mode)                                     \
524 static struct target_fabric_port_attribute target_fabric_port_##_name = \
525         __CONFIGFS_EATTR(_name, _mode,                                  \
526         target_fabric_port_show_attr_##_name,                           \
527         target_fabric_port_store_attr_##_name);
528
529 #define TCM_PORT_ATTOR_RO(_name)                                        \
530         __CONFIGFS_EATTR_RO(_name,                                      \
531         target_fabric_port_show_attr_##_name);
532
533 /*
534  * alua_tg_pt_gp
535  */
536 static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
537         struct se_lun *lun,
538         char *page)
539 {
540         if (!(lun))
541                 return -ENODEV;
542
543         if (!(lun->lun_sep))
544                 return -ENODEV;
545
546         return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
547 }
548
549 static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
550         struct se_lun *lun,
551         const char *page,
552         size_t count)
553 {
554         if (!(lun))
555                 return -ENODEV;
556
557         if (!(lun->lun_sep))
558                 return -ENODEV;
559
560         return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
561 }
562
563 TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
564
565 /*
566  * alua_tg_pt_offline
567  */
568 static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
569         struct se_lun *lun,
570         char *page)
571 {
572         if (!(lun))
573                 return -ENODEV;
574
575         if (!(lun->lun_sep))
576                 return -ENODEV;
577
578         return core_alua_show_offline_bit(lun, page);
579 }
580
581 static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
582         struct se_lun *lun,
583         const char *page,
584         size_t count)
585 {
586         if (!(lun))
587                 return -ENODEV;
588
589         if (!(lun->lun_sep))
590                 return -ENODEV;
591
592         return core_alua_store_offline_bit(lun, page, count);
593 }
594
595 TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
596
597 /*
598  * alua_tg_pt_status
599  */
600 static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
601         struct se_lun *lun,
602         char *page)
603 {
604         if (!(lun))
605                 return -ENODEV;
606
607         if (!(lun->lun_sep))
608                 return -ENODEV;
609
610         return core_alua_show_secondary_status(lun, page);
611 }
612
613 static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
614         struct se_lun *lun,
615         const char *page,
616         size_t count)
617 {
618         if (!(lun))
619                 return -ENODEV;
620
621         if (!(lun->lun_sep))
622                 return -ENODEV;
623
624         return core_alua_store_secondary_status(lun, page, count);
625 }
626
627 TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
628
629 /*
630  * alua_tg_pt_write_md
631  */
632 static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
633         struct se_lun *lun,
634         char *page)
635 {
636         if (!(lun))
637                 return -ENODEV;
638
639         if (!(lun->lun_sep))
640                 return -ENODEV;
641
642         return core_alua_show_secondary_write_metadata(lun, page);
643 }
644
645 static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
646         struct se_lun *lun,
647         const char *page,
648         size_t count)
649 {
650         if (!(lun))
651                 return -ENODEV;
652
653         if (!(lun->lun_sep))
654                 return -ENODEV;
655
656         return core_alua_store_secondary_write_metadata(lun, page, count);
657 }
658
659 TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
660
661
662 static struct configfs_attribute *target_fabric_port_attrs[] = {
663         &target_fabric_port_alua_tg_pt_gp.attr,
664         &target_fabric_port_alua_tg_pt_offline.attr,
665         &target_fabric_port_alua_tg_pt_status.attr,
666         &target_fabric_port_alua_tg_pt_write_md.attr,
667         NULL,
668 };
669
670 CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
671
672 static int target_fabric_port_link(
673         struct config_item *lun_ci,
674         struct config_item *se_dev_ci)
675 {
676         struct config_item *tpg_ci;
677         struct se_device *dev;
678         struct se_lun *lun = container_of(to_config_group(lun_ci),
679                                 struct se_lun, lun_group);
680         struct se_lun *lun_p;
681         struct se_portal_group *se_tpg;
682         struct se_subsystem_dev *se_dev = container_of(
683                                 to_config_group(se_dev_ci), struct se_subsystem_dev,
684                                 se_dev_group);
685         struct target_fabric_configfs *tf;
686         int ret;
687
688         tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
689         se_tpg = container_of(to_config_group(tpg_ci),
690                                 struct se_portal_group, tpg_group);
691         tf = se_tpg->se_tpg_wwn->wwn_tf;
692
693         if (lun->lun_se_dev !=  NULL) {
694                 printk(KERN_ERR "Port Symlink already exists\n");
695                 return -EEXIST;
696         }
697
698         dev = se_dev->se_dev_ptr;
699         if (!(dev)) {
700                 printk(KERN_ERR "Unable to locate struct se_device pointer from"
701                         " %s\n", config_item_name(se_dev_ci));
702                 ret = -ENODEV;
703                 goto out;
704         }
705
706         lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
707                                 lun->unpacked_lun);
708         if ((IS_ERR(lun_p)) || !(lun_p)) {
709                 printk(KERN_ERR "core_dev_add_lun() failed\n");
710                 ret = -EINVAL;
711                 goto out;
712         }
713
714         if (tf->tf_ops.fabric_post_link) {
715                 /*
716                  * Call the optional fabric_post_link() to allow a
717                  * fabric module to setup any additional state once
718                  * core_dev_add_lun() has been called..
719                  */
720                 tf->tf_ops.fabric_post_link(se_tpg, lun);
721         }
722
723         return 0;
724 out:
725         return ret;
726 }
727
728 static int target_fabric_port_unlink(
729         struct config_item *lun_ci,
730         struct config_item *se_dev_ci)
731 {
732         struct se_lun *lun = container_of(to_config_group(lun_ci),
733                                 struct se_lun, lun_group);
734         struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
735         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
736
737         if (tf->tf_ops.fabric_pre_unlink) {
738                 /*
739                  * Call the optional fabric_pre_unlink() to allow a
740                  * fabric module to release any additional stat before
741                  * core_dev_del_lun() is called.
742                 */
743                 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
744         }
745
746         core_dev_del_lun(se_tpg, lun->unpacked_lun);
747         return 0;
748 }
749
750 static struct configfs_item_operations target_fabric_port_item_ops = {
751         .show_attribute         = target_fabric_port_attr_show,
752         .store_attribute        = target_fabric_port_attr_store,
753         .allow_link             = target_fabric_port_link,
754         .drop_link              = target_fabric_port_unlink,
755 };
756
757 TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
758
759 /* End of tfc_tpg_port_cit */
760
761 /* Start of tfc_tpg_lun_cit */
762
763 static struct config_group *target_fabric_make_lun(
764         struct config_group *group,
765         const char *name)
766 {
767         struct se_lun *lun;
768         struct se_portal_group *se_tpg = container_of(group,
769                         struct se_portal_group, tpg_lun_group);
770         struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
771         unsigned long unpacked_lun;
772
773         if (strstr(name, "lun_") != name) {
774                 printk(KERN_ERR "Unable to locate \'_\" in"
775                                 " \"lun_$LUN_NUMBER\"\n");
776                 return ERR_PTR(-EINVAL);
777         }
778         if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
779                 return ERR_PTR(-EINVAL);
780
781         lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
782         if (!(lun))
783                 return ERR_PTR(-EINVAL);
784
785         config_group_init_type_name(&lun->lun_group, name,
786                         &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
787
788         return &lun->lun_group;
789 }
790
791 static void target_fabric_drop_lun(
792         struct config_group *group,
793         struct config_item *item)
794 {
795         config_item_put(item);
796 }
797
798 static struct configfs_group_operations target_fabric_lun_group_ops = {
799         .make_group     = &target_fabric_make_lun,
800         .drop_item      = &target_fabric_drop_lun,
801 };
802
803 TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
804
805 /* End of tfc_tpg_lun_cit */
806
807 /* Start of tfc_tpg_attrib_cit */
808
809 CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
810
811 static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
812         .show_attribute         = target_fabric_tpg_attrib_attr_show,
813         .store_attribute        = target_fabric_tpg_attrib_attr_store,
814 };
815
816 TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
817
818 /* End of tfc_tpg_attrib_cit */
819
820 /* Start of tfc_tpg_param_cit */
821
822 CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
823
824 static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
825         .show_attribute         = target_fabric_tpg_param_attr_show,
826         .store_attribute        = target_fabric_tpg_param_attr_store,
827 };
828
829 TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
830
831 /* End of tfc_tpg_param_cit */
832
833 /* Start of tfc_tpg_base_cit */
834 /*
835  * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
836  */
837 CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
838
839 static void target_fabric_tpg_release(struct config_item *item)
840 {
841         struct se_portal_group *se_tpg = container_of(to_config_group(item),
842                         struct se_portal_group, tpg_group);
843         struct se_wwn *wwn = se_tpg->se_tpg_wwn;
844         struct target_fabric_configfs *tf = wwn->wwn_tf;
845
846         tf->tf_ops.fabric_drop_tpg(se_tpg);
847 }
848
849 static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
850         .release                = target_fabric_tpg_release,
851         .show_attribute         = target_fabric_tpg_attr_show,
852         .store_attribute        = target_fabric_tpg_attr_store,
853 };
854
855 TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
856
857 /* End of tfc_tpg_base_cit */
858
859 /* Start of tfc_tpg_cit */
860
861 static struct config_group *target_fabric_make_tpg(
862         struct config_group *group,
863         const char *name)
864 {
865         struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
866         struct target_fabric_configfs *tf = wwn->wwn_tf;
867         struct se_portal_group *se_tpg;
868
869         if (!(tf->tf_ops.fabric_make_tpg)) {
870                 printk(KERN_ERR "tf->tf_ops.fabric_make_tpg is NULL\n");
871                 return ERR_PTR(-ENOSYS);
872         }
873
874         se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
875         if (!(se_tpg) || IS_ERR(se_tpg))
876                 return ERR_PTR(-EINVAL);
877         /*
878          * Setup default groups from pre-allocated se_tpg->tpg_default_groups
879          */
880         se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
881         se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
882         se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
883         se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
884         se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
885         se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
886         se_tpg->tpg_group.default_groups[5] = NULL;
887
888         config_group_init_type_name(&se_tpg->tpg_group, name,
889                         &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
890         config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
891                         &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
892         config_group_init_type_name(&se_tpg->tpg_np_group, "np",
893                         &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
894         config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
895                         &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
896         config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
897                         &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
898         config_group_init_type_name(&se_tpg->tpg_param_group, "param",
899                         &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
900
901         return &se_tpg->tpg_group;
902 }
903
904 static void target_fabric_drop_tpg(
905         struct config_group *group,
906         struct config_item *item)
907 {
908         struct se_portal_group *se_tpg = container_of(to_config_group(item),
909                                 struct se_portal_group, tpg_group);
910         struct config_group *tpg_cg = &se_tpg->tpg_group;
911         struct config_item *df_item;
912         int i;
913         /*
914          * Release default groups, but do not release tpg_cg->default_groups
915          * memory as it is statically allocated at se_tpg->tpg_default_groups.
916          */
917         for (i = 0; tpg_cg->default_groups[i]; i++) {
918                 df_item = &tpg_cg->default_groups[i]->cg_item;
919                 tpg_cg->default_groups[i] = NULL;
920                 config_item_put(df_item);
921         }
922
923         config_item_put(item);
924 }
925
926 static void target_fabric_release_wwn(struct config_item *item)
927 {
928         struct se_wwn *wwn = container_of(to_config_group(item),
929                                 struct se_wwn, wwn_group);
930         struct target_fabric_configfs *tf = wwn->wwn_tf;
931
932         tf->tf_ops.fabric_drop_wwn(wwn);
933 }
934
935 static struct configfs_item_operations target_fabric_tpg_item_ops = {
936         .release        = target_fabric_release_wwn,
937 };
938
939 static struct configfs_group_operations target_fabric_tpg_group_ops = {
940         .make_group     = target_fabric_make_tpg,
941         .drop_item      = target_fabric_drop_tpg,
942 };
943
944 TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
945                 NULL);
946
947 /* End of tfc_tpg_cit */
948
949 /* Start of tfc_wwn_cit */
950
951 static struct config_group *target_fabric_make_wwn(
952         struct config_group *group,
953         const char *name)
954 {
955         struct target_fabric_configfs *tf = container_of(group,
956                                 struct target_fabric_configfs, tf_group);
957         struct se_wwn *wwn;
958
959         if (!(tf->tf_ops.fabric_make_wwn)) {
960                 printk(KERN_ERR "tf->tf_ops.fabric_make_wwn is NULL\n");
961                 return ERR_PTR(-ENOSYS);
962         }
963
964         wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
965         if (!(wwn) || IS_ERR(wwn))
966                 return ERR_PTR(-EINVAL);
967
968         wwn->wwn_tf = tf;
969         config_group_init_type_name(&wwn->wwn_group, name,
970                         &TF_CIT_TMPL(tf)->tfc_tpg_cit);
971
972         return &wwn->wwn_group;
973 }
974
975 static void target_fabric_drop_wwn(
976         struct config_group *group,
977         struct config_item *item)
978 {
979         config_item_put(item);
980 }
981
982 static struct configfs_group_operations target_fabric_wwn_group_ops = {
983         .make_group     = target_fabric_make_wwn,
984         .drop_item      = target_fabric_drop_wwn,
985 };
986 /*
987  * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
988  */
989 CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
990
991 static struct configfs_item_operations target_fabric_wwn_item_ops = {
992         .show_attribute         = target_fabric_wwn_attr_show,
993         .store_attribute        = target_fabric_wwn_attr_store,
994 };
995
996 TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
997
998 /* End of tfc_wwn_cit */
999
1000 /* Start of tfc_discovery_cit */
1001
1002 CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1003                 tf_disc_group);
1004
1005 static struct configfs_item_operations target_fabric_discovery_item_ops = {
1006         .show_attribute         = target_fabric_discovery_attr_show,
1007         .store_attribute        = target_fabric_discovery_attr_store,
1008 };
1009
1010 TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
1011
1012 /* End of tfc_discovery_cit */
1013
1014 int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1015 {
1016         target_fabric_setup_discovery_cit(tf);
1017         target_fabric_setup_wwn_cit(tf);
1018         target_fabric_setup_tpg_cit(tf);
1019         target_fabric_setup_tpg_base_cit(tf);
1020         target_fabric_setup_tpg_port_cit(tf);
1021         target_fabric_setup_tpg_lun_cit(tf);
1022         target_fabric_setup_tpg_np_cit(tf);
1023         target_fabric_setup_tpg_np_base_cit(tf);
1024         target_fabric_setup_tpg_attrib_cit(tf);
1025         target_fabric_setup_tpg_param_cit(tf);
1026         target_fabric_setup_tpg_nacl_cit(tf);
1027         target_fabric_setup_tpg_nacl_base_cit(tf);
1028         target_fabric_setup_tpg_nacl_attrib_cit(tf);
1029         target_fabric_setup_tpg_nacl_auth_cit(tf);
1030         target_fabric_setup_tpg_nacl_param_cit(tf);
1031         target_fabric_setup_tpg_mappedlun_cit(tf);
1032
1033         return 0;
1034 }