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3699d92a KP |
1 | /******************************************************************************* |
2 | * Filename: tcm_fc.c | |
3 | * | |
4 | * This file contains the configfs implementation for TCM_fc fabric node. | |
5 | * Based on tcm_loop_configfs.c | |
6 | * | |
7 | * Copyright (c) 2010 Cisco Systems, Inc. | |
8 | * Copyright (c) 2009,2010 Rising Tide, Inc. | |
9 | * Copyright (c) 2009,2010 Linux-iSCSI.org | |
10 | * | |
11 | * Copyright (c) 2009,2010 Nicholas A. Bellinger <nab@linux-iscsi.org> | |
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> | |
3699d92a KP |
26 | #include <generated/utsrelease.h> |
27 | #include <linux/utsname.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/kthread.h> | |
31 | #include <linux/types.h> | |
32 | #include <linux/string.h> | |
33 | #include <linux/configfs.h> | |
635a2b3f | 34 | #include <linux/kernel.h> |
3699d92a KP |
35 | #include <linux/ctype.h> |
36 | #include <asm/unaligned.h> | |
37 | #include <scsi/scsi.h> | |
38 | #include <scsi/scsi_host.h> | |
39 | #include <scsi/scsi_device.h> | |
40 | #include <scsi/scsi_cmnd.h> | |
41 | #include <scsi/libfc.h> | |
42 | ||
43 | #include <target/target_core_base.h> | |
c4795fb2 | 44 | #include <target/target_core_fabric.h> |
3699d92a | 45 | #include <target/target_core_fabric_configfs.h> |
3699d92a | 46 | #include <target/target_core_configfs.h> |
3699d92a KP |
47 | #include <target/configfs_macros.h> |
48 | ||
49 | #include "tcm_fc.h" | |
50 | ||
51 | struct target_fabric_configfs *ft_configfs; | |
52 | ||
53 | LIST_HEAD(ft_lport_list); | |
54 | DEFINE_MUTEX(ft_lport_lock); | |
55 | ||
56 | unsigned int ft_debug_logging; | |
57 | module_param_named(debug_logging, ft_debug_logging, int, S_IRUGO|S_IWUSR); | |
58 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
59 | ||
60 | /* | |
61 | * Parse WWN. | |
62 | * If strict, we require lower-case hex and colon separators to be sure | |
63 | * the name is the same as what would be generated by ft_format_wwn() | |
64 | * so the name and wwn are mapped one-to-one. | |
65 | */ | |
66 | static ssize_t ft_parse_wwn(const char *name, u64 *wwn, int strict) | |
67 | { | |
68 | const char *cp; | |
69 | char c; | |
3699d92a KP |
70 | u32 byte = 0; |
71 | u32 pos = 0; | |
72 | u32 err; | |
635a2b3f | 73 | int val; |
3699d92a KP |
74 | |
75 | *wwn = 0; | |
76 | for (cp = name; cp < &name[FT_NAMELEN - 1]; cp++) { | |
77 | c = *cp; | |
78 | if (c == '\n' && cp[1] == '\0') | |
79 | continue; | |
80 | if (strict && pos++ == 2 && byte++ < 7) { | |
81 | pos = 0; | |
82 | if (c == ':') | |
83 | continue; | |
84 | err = 1; | |
85 | goto fail; | |
86 | } | |
87 | if (c == '\0') { | |
88 | err = 2; | |
89 | if (strict && byte != 8) | |
90 | goto fail; | |
91 | return cp - name; | |
92 | } | |
93 | err = 3; | |
635a2b3f AS |
94 | val = hex_to_bin(c); |
95 | if (val < 0 || (strict && isupper(c))) | |
3699d92a | 96 | goto fail; |
635a2b3f | 97 | *wwn = (*wwn << 4) | val; |
3699d92a KP |
98 | } |
99 | err = 4; | |
100 | fail: | |
6708bb27 | 101 | pr_debug("err %u len %zu pos %u byte %u\n", |
3699d92a KP |
102 | err, cp - name, pos, byte); |
103 | return -1; | |
104 | } | |
105 | ||
106 | ssize_t ft_format_wwn(char *buf, size_t len, u64 wwn) | |
107 | { | |
108 | u8 b[8]; | |
109 | ||
110 | put_unaligned_be64(wwn, b); | |
111 | return snprintf(buf, len, | |
112 | "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", | |
113 | b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]); | |
114 | } | |
115 | ||
116 | static ssize_t ft_wwn_show(void *arg, char *buf) | |
117 | { | |
118 | u64 *wwn = arg; | |
119 | ssize_t len; | |
120 | ||
121 | len = ft_format_wwn(buf, PAGE_SIZE - 2, *wwn); | |
122 | buf[len++] = '\n'; | |
123 | return len; | |
124 | } | |
125 | ||
126 | static ssize_t ft_wwn_store(void *arg, const char *buf, size_t len) | |
127 | { | |
128 | ssize_t ret; | |
129 | u64 wwn; | |
130 | ||
131 | ret = ft_parse_wwn(buf, &wwn, 0); | |
132 | if (ret > 0) | |
133 | *(u64 *)arg = wwn; | |
134 | return ret; | |
135 | } | |
136 | ||
137 | /* | |
138 | * ACL auth ops. | |
139 | */ | |
140 | ||
141 | static ssize_t ft_nacl_show_port_name( | |
142 | struct se_node_acl *se_nacl, | |
143 | char *page) | |
144 | { | |
145 | struct ft_node_acl *acl = container_of(se_nacl, | |
146 | struct ft_node_acl, se_node_acl); | |
147 | ||
148 | return ft_wwn_show(&acl->node_auth.port_name, page); | |
149 | } | |
150 | ||
151 | static ssize_t ft_nacl_store_port_name( | |
152 | struct se_node_acl *se_nacl, | |
153 | const char *page, | |
154 | size_t count) | |
155 | { | |
156 | struct ft_node_acl *acl = container_of(se_nacl, | |
157 | struct ft_node_acl, se_node_acl); | |
158 | ||
159 | return ft_wwn_store(&acl->node_auth.port_name, page, count); | |
160 | } | |
161 | ||
162 | TF_NACL_BASE_ATTR(ft, port_name, S_IRUGO | S_IWUSR); | |
163 | ||
164 | static ssize_t ft_nacl_show_node_name( | |
165 | struct se_node_acl *se_nacl, | |
166 | char *page) | |
167 | { | |
168 | struct ft_node_acl *acl = container_of(se_nacl, | |
169 | struct ft_node_acl, se_node_acl); | |
170 | ||
171 | return ft_wwn_show(&acl->node_auth.node_name, page); | |
172 | } | |
173 | ||
174 | static ssize_t ft_nacl_store_node_name( | |
175 | struct se_node_acl *se_nacl, | |
176 | const char *page, | |
177 | size_t count) | |
178 | { | |
179 | struct ft_node_acl *acl = container_of(se_nacl, | |
180 | struct ft_node_acl, se_node_acl); | |
181 | ||
182 | return ft_wwn_store(&acl->node_auth.node_name, page, count); | |
183 | } | |
184 | ||
185 | TF_NACL_BASE_ATTR(ft, node_name, S_IRUGO | S_IWUSR); | |
186 | ||
187 | static struct configfs_attribute *ft_nacl_base_attrs[] = { | |
188 | &ft_nacl_port_name.attr, | |
189 | &ft_nacl_node_name.attr, | |
190 | NULL, | |
191 | }; | |
192 | ||
193 | /* | |
194 | * ACL ops. | |
195 | */ | |
196 | ||
197 | /* | |
198 | * Add ACL for an initiator. The ACL is named arbitrarily. | |
199 | * The port_name and/or node_name are attributes. | |
200 | */ | |
201 | static struct se_node_acl *ft_add_acl( | |
202 | struct se_portal_group *se_tpg, | |
203 | struct config_group *group, | |
204 | const char *name) | |
205 | { | |
206 | struct ft_node_acl *acl; | |
207 | struct ft_tpg *tpg; | |
208 | u64 wwpn; | |
209 | u32 q_depth; | |
210 | ||
6708bb27 | 211 | pr_debug("add acl %s\n", name); |
3699d92a KP |
212 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); |
213 | ||
214 | if (ft_parse_wwn(name, &wwpn, 1) < 0) | |
215 | return ERR_PTR(-EINVAL); | |
216 | ||
217 | acl = kzalloc(sizeof(struct ft_node_acl), GFP_KERNEL); | |
2be18149 | 218 | if (!acl) |
3699d92a KP |
219 | return ERR_PTR(-ENOMEM); |
220 | acl->node_auth.port_name = wwpn; | |
221 | ||
222 | q_depth = 32; /* XXX bogus default - get from tpg? */ | |
223 | return core_tpg_add_initiator_node_acl(&tpg->se_tpg, | |
224 | &acl->se_node_acl, name, q_depth); | |
225 | } | |
226 | ||
227 | static void ft_del_acl(struct se_node_acl *se_acl) | |
228 | { | |
229 | struct se_portal_group *se_tpg = se_acl->se_tpg; | |
230 | struct ft_tpg *tpg; | |
231 | struct ft_node_acl *acl = container_of(se_acl, | |
232 | struct ft_node_acl, se_node_acl); | |
233 | ||
6708bb27 | 234 | pr_debug("del acl %s\n", |
3699d92a KP |
235 | config_item_name(&se_acl->acl_group.cg_item)); |
236 | ||
237 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
6708bb27 | 238 | pr_debug("del acl %p se_acl %p tpg %p se_tpg %p\n", |
3699d92a KP |
239 | acl, se_acl, tpg, &tpg->se_tpg); |
240 | ||
241 | core_tpg_del_initiator_node_acl(&tpg->se_tpg, se_acl, 1); | |
242 | kfree(acl); | |
243 | } | |
244 | ||
245 | struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata) | |
246 | { | |
247 | struct ft_node_acl *found = NULL; | |
248 | struct ft_node_acl *acl; | |
249 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
250 | struct se_node_acl *se_acl; | |
251 | ||
28638887 | 252 | spin_lock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
253 | list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) { |
254 | acl = container_of(se_acl, struct ft_node_acl, se_node_acl); | |
6708bb27 | 255 | pr_debug("acl %p port_name %llx\n", |
3699d92a KP |
256 | acl, (unsigned long long)acl->node_auth.port_name); |
257 | if (acl->node_auth.port_name == rdata->ids.port_name || | |
258 | acl->node_auth.node_name == rdata->ids.node_name) { | |
6708bb27 | 259 | pr_debug("acl %p port_name %llx matched\n", acl, |
3699d92a KP |
260 | (unsigned long long)rdata->ids.port_name); |
261 | found = acl; | |
262 | /* XXX need to hold onto ACL */ | |
263 | break; | |
264 | } | |
265 | } | |
28638887 | 266 | spin_unlock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
267 | return found; |
268 | } | |
269 | ||
270 | struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg) | |
271 | { | |
272 | struct ft_node_acl *acl; | |
273 | ||
274 | acl = kzalloc(sizeof(*acl), GFP_KERNEL); | |
2be18149 | 275 | if (!acl) { |
6708bb27 | 276 | pr_err("Unable to allocate struct ft_node_acl\n"); |
3699d92a KP |
277 | return NULL; |
278 | } | |
6708bb27 | 279 | pr_debug("acl %p\n", acl); |
3699d92a KP |
280 | return &acl->se_node_acl; |
281 | } | |
282 | ||
283 | static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg, | |
284 | struct se_node_acl *se_acl) | |
285 | { | |
286 | struct ft_node_acl *acl = container_of(se_acl, | |
287 | struct ft_node_acl, se_node_acl); | |
288 | ||
6708bb27 | 289 | pr_debug("acl %p\n", acl); |
3699d92a KP |
290 | kfree(acl); |
291 | } | |
292 | ||
293 | /* | |
294 | * local_port port_group (tpg) ops. | |
295 | */ | |
296 | static struct se_portal_group *ft_add_tpg( | |
297 | struct se_wwn *wwn, | |
298 | struct config_group *group, | |
299 | const char *name) | |
300 | { | |
301 | struct ft_lport_acl *lacl; | |
302 | struct ft_tpg *tpg; | |
06383f10 | 303 | struct workqueue_struct *wq; |
3699d92a KP |
304 | unsigned long index; |
305 | int ret; | |
306 | ||
6708bb27 | 307 | pr_debug("tcm_fc: add tpg %s\n", name); |
3699d92a KP |
308 | |
309 | /* | |
310 | * Name must be "tpgt_" followed by the index. | |
311 | */ | |
312 | if (strstr(name, "tpgt_") != name) | |
313 | return NULL; | |
57103d7f JH |
314 | |
315 | ret = kstrtoul(name + 5, 10, &index); | |
316 | if (ret) | |
317 | return NULL; | |
318 | if (index > UINT_MAX) | |
3699d92a KP |
319 | return NULL; |
320 | ||
321 | lacl = container_of(wwn, struct ft_lport_acl, fc_lport_wwn); | |
322 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
323 | if (!tpg) | |
324 | return NULL; | |
325 | tpg->index = index; | |
326 | tpg->lport_acl = lacl; | |
327 | INIT_LIST_HEAD(&tpg->lun_list); | |
3699d92a | 328 | |
06383f10 MR |
329 | wq = alloc_workqueue("tcm_fc", 0, 1); |
330 | if (!wq) { | |
3699d92a KP |
331 | kfree(tpg); |
332 | return NULL; | |
333 | } | |
334 | ||
06383f10 MR |
335 | ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg, |
336 | tpg, TRANSPORT_TPG_TYPE_NORMAL); | |
337 | if (ret < 0) { | |
338 | destroy_workqueue(wq); | |
3699d92a KP |
339 | kfree(tpg); |
340 | return NULL; | |
341 | } | |
06383f10 | 342 | tpg->workqueue = wq; |
3699d92a KP |
343 | |
344 | mutex_lock(&ft_lport_lock); | |
345 | list_add_tail(&tpg->list, &lacl->tpg_list); | |
346 | mutex_unlock(&ft_lport_lock); | |
347 | ||
348 | return &tpg->se_tpg; | |
349 | } | |
350 | ||
351 | static void ft_del_tpg(struct se_portal_group *se_tpg) | |
352 | { | |
353 | struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
354 | ||
6708bb27 | 355 | pr_debug("del tpg %s\n", |
3699d92a KP |
356 | config_item_name(&tpg->se_tpg.tpg_group.cg_item)); |
357 | ||
58fc73d1 | 358 | destroy_workqueue(tpg->workqueue); |
3699d92a KP |
359 | |
360 | /* Wait for sessions to be freed thru RCU, for BUG_ON below */ | |
361 | synchronize_rcu(); | |
362 | ||
363 | mutex_lock(&ft_lport_lock); | |
364 | list_del(&tpg->list); | |
365 | if (tpg->tport) { | |
366 | tpg->tport->tpg = NULL; | |
367 | tpg->tport = NULL; | |
368 | } | |
369 | mutex_unlock(&ft_lport_lock); | |
370 | ||
371 | core_tpg_deregister(se_tpg); | |
372 | kfree(tpg); | |
373 | } | |
374 | ||
375 | /* | |
376 | * Verify that an lport is configured to use the tcm_fc module, and return | |
377 | * the target port group that should be used. | |
378 | * | |
379 | * The caller holds ft_lport_lock. | |
380 | */ | |
381 | struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport) | |
382 | { | |
383 | struct ft_lport_acl *lacl; | |
384 | struct ft_tpg *tpg; | |
385 | ||
386 | list_for_each_entry(lacl, &ft_lport_list, list) { | |
387 | if (lacl->wwpn == lport->wwpn) { | |
388 | list_for_each_entry(tpg, &lacl->tpg_list, list) | |
389 | return tpg; /* XXX for now return first entry */ | |
390 | return NULL; | |
391 | } | |
392 | } | |
393 | return NULL; | |
394 | } | |
395 | ||
396 | /* | |
397 | * target config instance ops. | |
398 | */ | |
399 | ||
400 | /* | |
401 | * Add lport to allowed config. | |
402 | * The name is the WWPN in lower-case ASCII, colon-separated bytes. | |
403 | */ | |
404 | static struct se_wwn *ft_add_lport( | |
405 | struct target_fabric_configfs *tf, | |
406 | struct config_group *group, | |
407 | const char *name) | |
408 | { | |
409 | struct ft_lport_acl *lacl; | |
410 | struct ft_lport_acl *old_lacl; | |
411 | u64 wwpn; | |
412 | ||
6708bb27 | 413 | pr_debug("add lport %s\n", name); |
3699d92a KP |
414 | if (ft_parse_wwn(name, &wwpn, 1) < 0) |
415 | return NULL; | |
416 | lacl = kzalloc(sizeof(*lacl), GFP_KERNEL); | |
417 | if (!lacl) | |
418 | return NULL; | |
419 | lacl->wwpn = wwpn; | |
420 | INIT_LIST_HEAD(&lacl->tpg_list); | |
421 | ||
422 | mutex_lock(&ft_lport_lock); | |
423 | list_for_each_entry(old_lacl, &ft_lport_list, list) { | |
424 | if (old_lacl->wwpn == wwpn) { | |
425 | mutex_unlock(&ft_lport_lock); | |
426 | kfree(lacl); | |
427 | return NULL; | |
428 | } | |
429 | } | |
430 | list_add_tail(&lacl->list, &ft_lport_list); | |
431 | ft_format_wwn(lacl->name, sizeof(lacl->name), wwpn); | |
432 | mutex_unlock(&ft_lport_lock); | |
433 | ||
434 | return &lacl->fc_lport_wwn; | |
435 | } | |
436 | ||
437 | static void ft_del_lport(struct se_wwn *wwn) | |
438 | { | |
439 | struct ft_lport_acl *lacl = container_of(wwn, | |
440 | struct ft_lport_acl, fc_lport_wwn); | |
441 | ||
6297b07c | 442 | pr_debug("del lport %s\n", lacl->name); |
3699d92a KP |
443 | mutex_lock(&ft_lport_lock); |
444 | list_del(&lacl->list); | |
445 | mutex_unlock(&ft_lport_lock); | |
446 | ||
447 | kfree(lacl); | |
448 | } | |
449 | ||
450 | static ssize_t ft_wwn_show_attr_version( | |
451 | struct target_fabric_configfs *tf, | |
452 | char *page) | |
453 | { | |
454 | return sprintf(page, "TCM FC " FT_VERSION " on %s/%s on " | |
455 | ""UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); | |
456 | } | |
457 | ||
458 | TF_WWN_ATTR_RO(ft, version); | |
459 | ||
460 | static struct configfs_attribute *ft_wwn_attrs[] = { | |
461 | &ft_wwn_version.attr, | |
462 | NULL, | |
463 | }; | |
464 | ||
465 | static char *ft_get_fabric_name(void) | |
466 | { | |
467 | return "fc"; | |
468 | } | |
469 | ||
470 | static char *ft_get_fabric_wwn(struct se_portal_group *se_tpg) | |
471 | { | |
472 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
473 | ||
474 | return tpg->lport_acl->name; | |
475 | } | |
476 | ||
477 | static u16 ft_get_tag(struct se_portal_group *se_tpg) | |
478 | { | |
479 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
480 | ||
481 | /* | |
482 | * This tag is used when forming SCSI Name identifier in EVPD=1 0x83 | |
483 | * to represent the SCSI Target Port. | |
484 | */ | |
485 | return tpg->index; | |
486 | } | |
487 | ||
488 | static u32 ft_get_default_depth(struct se_portal_group *se_tpg) | |
489 | { | |
490 | return 1; | |
491 | } | |
492 | ||
493 | static int ft_check_false(struct se_portal_group *se_tpg) | |
494 | { | |
495 | return 0; | |
496 | } | |
497 | ||
498 | static void ft_set_default_node_attr(struct se_node_acl *se_nacl) | |
499 | { | |
500 | } | |
501 | ||
3699d92a KP |
502 | static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg) |
503 | { | |
504 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
505 | ||
506 | return tpg->index; | |
507 | } | |
508 | ||
3699d92a KP |
509 | static struct target_core_fabric_ops ft_fabric_ops = { |
510 | .get_fabric_name = ft_get_fabric_name, | |
511 | .get_fabric_proto_ident = fc_get_fabric_proto_ident, | |
512 | .tpg_get_wwn = ft_get_fabric_wwn, | |
513 | .tpg_get_tag = ft_get_tag, | |
514 | .tpg_get_default_depth = ft_get_default_depth, | |
515 | .tpg_get_pr_transport_id = fc_get_pr_transport_id, | |
516 | .tpg_get_pr_transport_id_len = fc_get_pr_transport_id_len, | |
517 | .tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id, | |
518 | .tpg_check_demo_mode = ft_check_false, | |
519 | .tpg_check_demo_mode_cache = ft_check_false, | |
520 | .tpg_check_demo_mode_write_protect = ft_check_false, | |
521 | .tpg_check_prod_mode_write_protect = ft_check_false, | |
522 | .tpg_alloc_fabric_acl = ft_tpg_alloc_fabric_acl, | |
523 | .tpg_release_fabric_acl = ft_tpg_release_fabric_acl, | |
524 | .tpg_get_inst_index = ft_tpg_get_inst_index, | |
525 | .check_stop_free = ft_check_stop_free, | |
35462975 | 526 | .release_cmd = ft_release_cmd, |
3699d92a KP |
527 | .shutdown_session = ft_sess_shutdown, |
528 | .close_session = ft_sess_close, | |
3699d92a KP |
529 | .sess_get_index = ft_sess_get_index, |
530 | .sess_get_initiator_sid = NULL, | |
531 | .write_pending = ft_write_pending, | |
532 | .write_pending_status = ft_write_pending_status, | |
533 | .set_default_node_attributes = ft_set_default_node_attr, | |
534 | .get_task_tag = ft_get_task_tag, | |
535 | .get_cmd_state = ft_get_cmd_state, | |
3699d92a KP |
536 | .queue_data_in = ft_queue_data_in, |
537 | .queue_status = ft_queue_status, | |
538 | .queue_tm_rsp = ft_queue_tm_resp, | |
3699d92a KP |
539 | /* |
540 | * Setup function pointers for generic logic in | |
541 | * target_core_fabric_configfs.c | |
542 | */ | |
543 | .fabric_make_wwn = &ft_add_lport, | |
544 | .fabric_drop_wwn = &ft_del_lport, | |
545 | .fabric_make_tpg = &ft_add_tpg, | |
546 | .fabric_drop_tpg = &ft_del_tpg, | |
547 | .fabric_post_link = NULL, | |
548 | .fabric_pre_unlink = NULL, | |
549 | .fabric_make_np = NULL, | |
550 | .fabric_drop_np = NULL, | |
551 | .fabric_make_nodeacl = &ft_add_acl, | |
552 | .fabric_drop_nodeacl = &ft_del_acl, | |
553 | }; | |
554 | ||
555 | int ft_register_configfs(void) | |
556 | { | |
557 | struct target_fabric_configfs *fabric; | |
558 | int ret; | |
559 | ||
560 | /* | |
561 | * Register the top level struct config_item_type with TCM core | |
562 | */ | |
563 | fabric = target_fabric_configfs_init(THIS_MODULE, "fc"); | |
e3d6f909 | 564 | if (IS_ERR(fabric)) { |
6708bb27 | 565 | pr_err("%s: target_fabric_configfs_init() failed!\n", |
3699d92a | 566 | __func__); |
e3d6f909 | 567 | return PTR_ERR(fabric); |
3699d92a KP |
568 | } |
569 | fabric->tf_ops = ft_fabric_ops; | |
570 | ||
3699d92a KP |
571 | /* |
572 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
573 | */ | |
574 | TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = ft_wwn_attrs; | |
575 | TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL; | |
576 | TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; | |
577 | TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; | |
578 | TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; | |
579 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = | |
580 | ft_nacl_base_attrs; | |
581 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL; | |
582 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL; | |
583 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL; | |
584 | /* | |
585 | * register the fabric for use within TCM | |
586 | */ | |
587 | ret = target_fabric_configfs_register(fabric); | |
588 | if (ret < 0) { | |
6708bb27 | 589 | pr_debug("target_fabric_configfs_register() for" |
3699d92a | 590 | " FC Target failed!\n"); |
3699d92a KP |
591 | target_fabric_configfs_free(fabric); |
592 | return -1; | |
593 | } | |
594 | ||
595 | /* | |
596 | * Setup our local pointer to *fabric. | |
597 | */ | |
598 | ft_configfs = fabric; | |
599 | return 0; | |
600 | } | |
601 | ||
602 | void ft_deregister_configfs(void) | |
603 | { | |
604 | if (!ft_configfs) | |
605 | return; | |
606 | target_fabric_configfs_deregister(ft_configfs); | |
607 | ft_configfs = NULL; | |
608 | } | |
609 | ||
610 | static struct notifier_block ft_notifier = { | |
611 | .notifier_call = ft_lport_notify | |
612 | }; | |
613 | ||
614 | static int __init ft_init(void) | |
615 | { | |
616 | if (ft_register_configfs()) | |
617 | return -1; | |
618 | if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) { | |
619 | ft_deregister_configfs(); | |
620 | return -1; | |
621 | } | |
622 | blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier); | |
623 | fc_lport_iterate(ft_lport_add, NULL); | |
624 | return 0; | |
625 | } | |
626 | ||
627 | static void __exit ft_exit(void) | |
628 | { | |
629 | blocking_notifier_chain_unregister(&fc_lport_notifier_head, | |
630 | &ft_notifier); | |
631 | fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov); | |
632 | fc_lport_iterate(ft_lport_del, NULL); | |
633 | ft_deregister_configfs(); | |
634 | synchronize_rcu(); | |
635 | } | |
636 | ||
3699d92a KP |
637 | MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION); |
638 | MODULE_LICENSE("GPL"); | |
639 | module_init(ft_init); | |
640 | module_exit(ft_exit); |