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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> | |
26 | #include <linux/version.h> | |
27 | #include <generated/utsrelease.h> | |
28 | #include <linux/utsname.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/kthread.h> | |
32 | #include <linux/types.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/configfs.h> | |
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> | |
44 | #include <target/target_core_transport.h> | |
45 | #include <target/target_core_fabric_ops.h> | |
46 | #include <target/target_core_fabric_configfs.h> | |
47 | #include <target/target_core_fabric_lib.h> | |
48 | #include <target/target_core_device.h> | |
49 | #include <target/target_core_tpg.h> | |
50 | #include <target/target_core_configfs.h> | |
3699d92a KP |
51 | #include <target/configfs_macros.h> |
52 | ||
53 | #include "tcm_fc.h" | |
54 | ||
55 | struct target_fabric_configfs *ft_configfs; | |
56 | ||
57 | LIST_HEAD(ft_lport_list); | |
58 | DEFINE_MUTEX(ft_lport_lock); | |
59 | ||
60 | unsigned int ft_debug_logging; | |
61 | module_param_named(debug_logging, ft_debug_logging, int, S_IRUGO|S_IWUSR); | |
62 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
63 | ||
64 | /* | |
65 | * Parse WWN. | |
66 | * If strict, we require lower-case hex and colon separators to be sure | |
67 | * the name is the same as what would be generated by ft_format_wwn() | |
68 | * so the name and wwn are mapped one-to-one. | |
69 | */ | |
70 | static ssize_t ft_parse_wwn(const char *name, u64 *wwn, int strict) | |
71 | { | |
72 | const char *cp; | |
73 | char c; | |
74 | u32 nibble; | |
75 | u32 byte = 0; | |
76 | u32 pos = 0; | |
77 | u32 err; | |
78 | ||
79 | *wwn = 0; | |
80 | for (cp = name; cp < &name[FT_NAMELEN - 1]; cp++) { | |
81 | c = *cp; | |
82 | if (c == '\n' && cp[1] == '\0') | |
83 | continue; | |
84 | if (strict && pos++ == 2 && byte++ < 7) { | |
85 | pos = 0; | |
86 | if (c == ':') | |
87 | continue; | |
88 | err = 1; | |
89 | goto fail; | |
90 | } | |
91 | if (c == '\0') { | |
92 | err = 2; | |
93 | if (strict && byte != 8) | |
94 | goto fail; | |
95 | return cp - name; | |
96 | } | |
97 | err = 3; | |
98 | if (isdigit(c)) | |
99 | nibble = c - '0'; | |
100 | else if (isxdigit(c) && (islower(c) || !strict)) | |
101 | nibble = tolower(c) - 'a' + 10; | |
102 | else | |
103 | goto fail; | |
104 | *wwn = (*wwn << 4) | nibble; | |
105 | } | |
106 | err = 4; | |
107 | fail: | |
6708bb27 | 108 | pr_debug("err %u len %zu pos %u byte %u\n", |
3699d92a KP |
109 | err, cp - name, pos, byte); |
110 | return -1; | |
111 | } | |
112 | ||
113 | ssize_t ft_format_wwn(char *buf, size_t len, u64 wwn) | |
114 | { | |
115 | u8 b[8]; | |
116 | ||
117 | put_unaligned_be64(wwn, b); | |
118 | return snprintf(buf, len, | |
119 | "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", | |
120 | b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]); | |
121 | } | |
122 | ||
123 | static ssize_t ft_wwn_show(void *arg, char *buf) | |
124 | { | |
125 | u64 *wwn = arg; | |
126 | ssize_t len; | |
127 | ||
128 | len = ft_format_wwn(buf, PAGE_SIZE - 2, *wwn); | |
129 | buf[len++] = '\n'; | |
130 | return len; | |
131 | } | |
132 | ||
133 | static ssize_t ft_wwn_store(void *arg, const char *buf, size_t len) | |
134 | { | |
135 | ssize_t ret; | |
136 | u64 wwn; | |
137 | ||
138 | ret = ft_parse_wwn(buf, &wwn, 0); | |
139 | if (ret > 0) | |
140 | *(u64 *)arg = wwn; | |
141 | return ret; | |
142 | } | |
143 | ||
144 | /* | |
145 | * ACL auth ops. | |
146 | */ | |
147 | ||
148 | static ssize_t ft_nacl_show_port_name( | |
149 | struct se_node_acl *se_nacl, | |
150 | char *page) | |
151 | { | |
152 | struct ft_node_acl *acl = container_of(se_nacl, | |
153 | struct ft_node_acl, se_node_acl); | |
154 | ||
155 | return ft_wwn_show(&acl->node_auth.port_name, page); | |
156 | } | |
157 | ||
158 | static ssize_t ft_nacl_store_port_name( | |
159 | struct se_node_acl *se_nacl, | |
160 | const char *page, | |
161 | size_t count) | |
162 | { | |
163 | struct ft_node_acl *acl = container_of(se_nacl, | |
164 | struct ft_node_acl, se_node_acl); | |
165 | ||
166 | return ft_wwn_store(&acl->node_auth.port_name, page, count); | |
167 | } | |
168 | ||
169 | TF_NACL_BASE_ATTR(ft, port_name, S_IRUGO | S_IWUSR); | |
170 | ||
171 | static ssize_t ft_nacl_show_node_name( | |
172 | struct se_node_acl *se_nacl, | |
173 | char *page) | |
174 | { | |
175 | struct ft_node_acl *acl = container_of(se_nacl, | |
176 | struct ft_node_acl, se_node_acl); | |
177 | ||
178 | return ft_wwn_show(&acl->node_auth.node_name, page); | |
179 | } | |
180 | ||
181 | static ssize_t ft_nacl_store_node_name( | |
182 | struct se_node_acl *se_nacl, | |
183 | const char *page, | |
184 | size_t count) | |
185 | { | |
186 | struct ft_node_acl *acl = container_of(se_nacl, | |
187 | struct ft_node_acl, se_node_acl); | |
188 | ||
189 | return ft_wwn_store(&acl->node_auth.node_name, page, count); | |
190 | } | |
191 | ||
192 | TF_NACL_BASE_ATTR(ft, node_name, S_IRUGO | S_IWUSR); | |
193 | ||
194 | static struct configfs_attribute *ft_nacl_base_attrs[] = { | |
195 | &ft_nacl_port_name.attr, | |
196 | &ft_nacl_node_name.attr, | |
197 | NULL, | |
198 | }; | |
199 | ||
200 | /* | |
201 | * ACL ops. | |
202 | */ | |
203 | ||
204 | /* | |
205 | * Add ACL for an initiator. The ACL is named arbitrarily. | |
206 | * The port_name and/or node_name are attributes. | |
207 | */ | |
208 | static struct se_node_acl *ft_add_acl( | |
209 | struct se_portal_group *se_tpg, | |
210 | struct config_group *group, | |
211 | const char *name) | |
212 | { | |
213 | struct ft_node_acl *acl; | |
214 | struct ft_tpg *tpg; | |
215 | u64 wwpn; | |
216 | u32 q_depth; | |
217 | ||
6708bb27 | 218 | pr_debug("add acl %s\n", name); |
3699d92a KP |
219 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); |
220 | ||
221 | if (ft_parse_wwn(name, &wwpn, 1) < 0) | |
222 | return ERR_PTR(-EINVAL); | |
223 | ||
224 | acl = kzalloc(sizeof(struct ft_node_acl), GFP_KERNEL); | |
2be18149 | 225 | if (!acl) |
3699d92a KP |
226 | return ERR_PTR(-ENOMEM); |
227 | acl->node_auth.port_name = wwpn; | |
228 | ||
229 | q_depth = 32; /* XXX bogus default - get from tpg? */ | |
230 | return core_tpg_add_initiator_node_acl(&tpg->se_tpg, | |
231 | &acl->se_node_acl, name, q_depth); | |
232 | } | |
233 | ||
234 | static void ft_del_acl(struct se_node_acl *se_acl) | |
235 | { | |
236 | struct se_portal_group *se_tpg = se_acl->se_tpg; | |
237 | struct ft_tpg *tpg; | |
238 | struct ft_node_acl *acl = container_of(se_acl, | |
239 | struct ft_node_acl, se_node_acl); | |
240 | ||
6708bb27 | 241 | pr_debug("del acl %s\n", |
3699d92a KP |
242 | config_item_name(&se_acl->acl_group.cg_item)); |
243 | ||
244 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
6708bb27 | 245 | pr_debug("del acl %p se_acl %p tpg %p se_tpg %p\n", |
3699d92a KP |
246 | acl, se_acl, tpg, &tpg->se_tpg); |
247 | ||
248 | core_tpg_del_initiator_node_acl(&tpg->se_tpg, se_acl, 1); | |
249 | kfree(acl); | |
250 | } | |
251 | ||
252 | struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata) | |
253 | { | |
254 | struct ft_node_acl *found = NULL; | |
255 | struct ft_node_acl *acl; | |
256 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
257 | struct se_node_acl *se_acl; | |
258 | ||
28638887 | 259 | spin_lock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
260 | list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) { |
261 | acl = container_of(se_acl, struct ft_node_acl, se_node_acl); | |
6708bb27 | 262 | pr_debug("acl %p port_name %llx\n", |
3699d92a KP |
263 | acl, (unsigned long long)acl->node_auth.port_name); |
264 | if (acl->node_auth.port_name == rdata->ids.port_name || | |
265 | acl->node_auth.node_name == rdata->ids.node_name) { | |
6708bb27 | 266 | pr_debug("acl %p port_name %llx matched\n", acl, |
3699d92a KP |
267 | (unsigned long long)rdata->ids.port_name); |
268 | found = acl; | |
269 | /* XXX need to hold onto ACL */ | |
270 | break; | |
271 | } | |
272 | } | |
28638887 | 273 | spin_unlock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
274 | return found; |
275 | } | |
276 | ||
277 | struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg) | |
278 | { | |
279 | struct ft_node_acl *acl; | |
280 | ||
281 | acl = kzalloc(sizeof(*acl), GFP_KERNEL); | |
2be18149 | 282 | if (!acl) { |
6708bb27 | 283 | pr_err("Unable to allocate struct ft_node_acl\n"); |
3699d92a KP |
284 | return NULL; |
285 | } | |
6708bb27 | 286 | pr_debug("acl %p\n", acl); |
3699d92a KP |
287 | return &acl->se_node_acl; |
288 | } | |
289 | ||
290 | static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg, | |
291 | struct se_node_acl *se_acl) | |
292 | { | |
293 | struct ft_node_acl *acl = container_of(se_acl, | |
294 | struct ft_node_acl, se_node_acl); | |
295 | ||
6708bb27 | 296 | pr_debug("acl %p\n", acl); |
3699d92a KP |
297 | kfree(acl); |
298 | } | |
299 | ||
300 | /* | |
301 | * local_port port_group (tpg) ops. | |
302 | */ | |
303 | static struct se_portal_group *ft_add_tpg( | |
304 | struct se_wwn *wwn, | |
305 | struct config_group *group, | |
306 | const char *name) | |
307 | { | |
308 | struct ft_lport_acl *lacl; | |
309 | struct ft_tpg *tpg; | |
310 | unsigned long index; | |
311 | int ret; | |
312 | ||
6708bb27 | 313 | pr_debug("tcm_fc: add tpg %s\n", name); |
3699d92a KP |
314 | |
315 | /* | |
316 | * Name must be "tpgt_" followed by the index. | |
317 | */ | |
318 | if (strstr(name, "tpgt_") != name) | |
319 | return NULL; | |
320 | if (strict_strtoul(name + 5, 10, &index) || index > UINT_MAX) | |
321 | return NULL; | |
322 | ||
323 | lacl = container_of(wwn, struct ft_lport_acl, fc_lport_wwn); | |
324 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
325 | if (!tpg) | |
326 | return NULL; | |
327 | tpg->index = index; | |
328 | tpg->lport_acl = lacl; | |
329 | INIT_LIST_HEAD(&tpg->lun_list); | |
330 | transport_init_queue_obj(&tpg->qobj); | |
331 | ||
332 | ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg, | |
5951146d | 333 | tpg, TRANSPORT_TPG_TYPE_NORMAL); |
3699d92a KP |
334 | if (ret < 0) { |
335 | kfree(tpg); | |
336 | return NULL; | |
337 | } | |
338 | ||
339 | tpg->thread = kthread_run(ft_thread, tpg, "ft_tpg%lu", index); | |
340 | if (IS_ERR(tpg->thread)) { | |
341 | kfree(tpg); | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | mutex_lock(&ft_lport_lock); | |
346 | list_add_tail(&tpg->list, &lacl->tpg_list); | |
347 | mutex_unlock(&ft_lport_lock); | |
348 | ||
349 | return &tpg->se_tpg; | |
350 | } | |
351 | ||
352 | static void ft_del_tpg(struct se_portal_group *se_tpg) | |
353 | { | |
354 | struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
355 | ||
6708bb27 | 356 | pr_debug("del tpg %s\n", |
3699d92a KP |
357 | config_item_name(&tpg->se_tpg.tpg_group.cg_item)); |
358 | ||
359 | kthread_stop(tpg->thread); | |
360 | ||
361 | /* Wait for sessions to be freed thru RCU, for BUG_ON below */ | |
362 | synchronize_rcu(); | |
363 | ||
364 | mutex_lock(&ft_lport_lock); | |
365 | list_del(&tpg->list); | |
366 | if (tpg->tport) { | |
367 | tpg->tport->tpg = NULL; | |
368 | tpg->tport = NULL; | |
369 | } | |
370 | mutex_unlock(&ft_lport_lock); | |
371 | ||
372 | core_tpg_deregister(se_tpg); | |
373 | kfree(tpg); | |
374 | } | |
375 | ||
376 | /* | |
377 | * Verify that an lport is configured to use the tcm_fc module, and return | |
378 | * the target port group that should be used. | |
379 | * | |
380 | * The caller holds ft_lport_lock. | |
381 | */ | |
382 | struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport) | |
383 | { | |
384 | struct ft_lport_acl *lacl; | |
385 | struct ft_tpg *tpg; | |
386 | ||
387 | list_for_each_entry(lacl, &ft_lport_list, list) { | |
388 | if (lacl->wwpn == lport->wwpn) { | |
389 | list_for_each_entry(tpg, &lacl->tpg_list, list) | |
390 | return tpg; /* XXX for now return first entry */ | |
391 | return NULL; | |
392 | } | |
393 | } | |
394 | return NULL; | |
395 | } | |
396 | ||
397 | /* | |
398 | * target config instance ops. | |
399 | */ | |
400 | ||
401 | /* | |
402 | * Add lport to allowed config. | |
403 | * The name is the WWPN in lower-case ASCII, colon-separated bytes. | |
404 | */ | |
405 | static struct se_wwn *ft_add_lport( | |
406 | struct target_fabric_configfs *tf, | |
407 | struct config_group *group, | |
408 | const char *name) | |
409 | { | |
410 | struct ft_lport_acl *lacl; | |
411 | struct ft_lport_acl *old_lacl; | |
412 | u64 wwpn; | |
413 | ||
6708bb27 | 414 | pr_debug("add lport %s\n", name); |
3699d92a KP |
415 | if (ft_parse_wwn(name, &wwpn, 1) < 0) |
416 | return NULL; | |
417 | lacl = kzalloc(sizeof(*lacl), GFP_KERNEL); | |
418 | if (!lacl) | |
419 | return NULL; | |
420 | lacl->wwpn = wwpn; | |
421 | INIT_LIST_HEAD(&lacl->tpg_list); | |
422 | ||
423 | mutex_lock(&ft_lport_lock); | |
424 | list_for_each_entry(old_lacl, &ft_lport_list, list) { | |
425 | if (old_lacl->wwpn == wwpn) { | |
426 | mutex_unlock(&ft_lport_lock); | |
427 | kfree(lacl); | |
428 | return NULL; | |
429 | } | |
430 | } | |
431 | list_add_tail(&lacl->list, &ft_lport_list); | |
432 | ft_format_wwn(lacl->name, sizeof(lacl->name), wwpn); | |
433 | mutex_unlock(&ft_lport_lock); | |
434 | ||
435 | return &lacl->fc_lport_wwn; | |
436 | } | |
437 | ||
438 | static void ft_del_lport(struct se_wwn *wwn) | |
439 | { | |
440 | struct ft_lport_acl *lacl = container_of(wwn, | |
441 | struct ft_lport_acl, fc_lport_wwn); | |
442 | ||
6708bb27 | 443 | pr_debug("del lport %s\n", |
3699d92a KP |
444 | config_item_name(&wwn->wwn_group.cg_item)); |
445 | mutex_lock(&ft_lport_lock); | |
446 | list_del(&lacl->list); | |
447 | mutex_unlock(&ft_lport_lock); | |
448 | ||
449 | kfree(lacl); | |
450 | } | |
451 | ||
452 | static ssize_t ft_wwn_show_attr_version( | |
453 | struct target_fabric_configfs *tf, | |
454 | char *page) | |
455 | { | |
456 | return sprintf(page, "TCM FC " FT_VERSION " on %s/%s on " | |
457 | ""UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); | |
458 | } | |
459 | ||
460 | TF_WWN_ATTR_RO(ft, version); | |
461 | ||
462 | static struct configfs_attribute *ft_wwn_attrs[] = { | |
463 | &ft_wwn_version.attr, | |
464 | NULL, | |
465 | }; | |
466 | ||
467 | static char *ft_get_fabric_name(void) | |
468 | { | |
469 | return "fc"; | |
470 | } | |
471 | ||
472 | static char *ft_get_fabric_wwn(struct se_portal_group *se_tpg) | |
473 | { | |
474 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
475 | ||
476 | return tpg->lport_acl->name; | |
477 | } | |
478 | ||
479 | static u16 ft_get_tag(struct se_portal_group *se_tpg) | |
480 | { | |
481 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
482 | ||
483 | /* | |
484 | * This tag is used when forming SCSI Name identifier in EVPD=1 0x83 | |
485 | * to represent the SCSI Target Port. | |
486 | */ | |
487 | return tpg->index; | |
488 | } | |
489 | ||
490 | static u32 ft_get_default_depth(struct se_portal_group *se_tpg) | |
491 | { | |
492 | return 1; | |
493 | } | |
494 | ||
495 | static int ft_check_false(struct se_portal_group *se_tpg) | |
496 | { | |
497 | return 0; | |
498 | } | |
499 | ||
500 | static void ft_set_default_node_attr(struct se_node_acl *se_nacl) | |
501 | { | |
502 | } | |
503 | ||
504 | static u16 ft_get_fabric_sense_len(void) | |
505 | { | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static u16 ft_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_len) | |
510 | { | |
511 | return 0; | |
512 | } | |
513 | ||
514 | static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
515 | { | |
516 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
517 | ||
518 | return tpg->index; | |
519 | } | |
520 | ||
3699d92a KP |
521 | static struct target_core_fabric_ops ft_fabric_ops = { |
522 | .get_fabric_name = ft_get_fabric_name, | |
523 | .get_fabric_proto_ident = fc_get_fabric_proto_ident, | |
524 | .tpg_get_wwn = ft_get_fabric_wwn, | |
525 | .tpg_get_tag = ft_get_tag, | |
526 | .tpg_get_default_depth = ft_get_default_depth, | |
527 | .tpg_get_pr_transport_id = fc_get_pr_transport_id, | |
528 | .tpg_get_pr_transport_id_len = fc_get_pr_transport_id_len, | |
529 | .tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id, | |
530 | .tpg_check_demo_mode = ft_check_false, | |
531 | .tpg_check_demo_mode_cache = ft_check_false, | |
532 | .tpg_check_demo_mode_write_protect = ft_check_false, | |
533 | .tpg_check_prod_mode_write_protect = ft_check_false, | |
534 | .tpg_alloc_fabric_acl = ft_tpg_alloc_fabric_acl, | |
535 | .tpg_release_fabric_acl = ft_tpg_release_fabric_acl, | |
536 | .tpg_get_inst_index = ft_tpg_get_inst_index, | |
537 | .check_stop_free = ft_check_stop_free, | |
35462975 | 538 | .release_cmd = ft_release_cmd, |
3699d92a KP |
539 | .shutdown_session = ft_sess_shutdown, |
540 | .close_session = ft_sess_close, | |
541 | .stop_session = ft_sess_stop, | |
542 | .fall_back_to_erl0 = ft_sess_set_erl0, | |
543 | .sess_logged_in = ft_sess_logged_in, | |
544 | .sess_get_index = ft_sess_get_index, | |
545 | .sess_get_initiator_sid = NULL, | |
546 | .write_pending = ft_write_pending, | |
547 | .write_pending_status = ft_write_pending_status, | |
548 | .set_default_node_attributes = ft_set_default_node_attr, | |
549 | .get_task_tag = ft_get_task_tag, | |
550 | .get_cmd_state = ft_get_cmd_state, | |
3699d92a KP |
551 | .queue_data_in = ft_queue_data_in, |
552 | .queue_status = ft_queue_status, | |
553 | .queue_tm_rsp = ft_queue_tm_resp, | |
554 | .get_fabric_sense_len = ft_get_fabric_sense_len, | |
555 | .set_fabric_sense_len = ft_set_fabric_sense_len, | |
556 | .is_state_remove = ft_is_state_remove, | |
3699d92a KP |
557 | /* |
558 | * Setup function pointers for generic logic in | |
559 | * target_core_fabric_configfs.c | |
560 | */ | |
561 | .fabric_make_wwn = &ft_add_lport, | |
562 | .fabric_drop_wwn = &ft_del_lport, | |
563 | .fabric_make_tpg = &ft_add_tpg, | |
564 | .fabric_drop_tpg = &ft_del_tpg, | |
565 | .fabric_post_link = NULL, | |
566 | .fabric_pre_unlink = NULL, | |
567 | .fabric_make_np = NULL, | |
568 | .fabric_drop_np = NULL, | |
569 | .fabric_make_nodeacl = &ft_add_acl, | |
570 | .fabric_drop_nodeacl = &ft_del_acl, | |
571 | }; | |
572 | ||
573 | int ft_register_configfs(void) | |
574 | { | |
575 | struct target_fabric_configfs *fabric; | |
576 | int ret; | |
577 | ||
578 | /* | |
579 | * Register the top level struct config_item_type with TCM core | |
580 | */ | |
581 | fabric = target_fabric_configfs_init(THIS_MODULE, "fc"); | |
e3d6f909 | 582 | if (IS_ERR(fabric)) { |
6708bb27 | 583 | pr_err("%s: target_fabric_configfs_init() failed!\n", |
3699d92a | 584 | __func__); |
e3d6f909 | 585 | return PTR_ERR(fabric); |
3699d92a KP |
586 | } |
587 | fabric->tf_ops = ft_fabric_ops; | |
588 | ||
589 | /* Allowing support for task_sg_chaining */ | |
590 | fabric->tf_ops.task_sg_chaining = 1; | |
591 | ||
592 | /* | |
593 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
594 | */ | |
595 | TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = ft_wwn_attrs; | |
596 | TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL; | |
597 | TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; | |
598 | TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; | |
599 | TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; | |
600 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = | |
601 | ft_nacl_base_attrs; | |
602 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL; | |
603 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL; | |
604 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL; | |
605 | /* | |
606 | * register the fabric for use within TCM | |
607 | */ | |
608 | ret = target_fabric_configfs_register(fabric); | |
609 | if (ret < 0) { | |
6708bb27 | 610 | pr_debug("target_fabric_configfs_register() for" |
3699d92a | 611 | " FC Target failed!\n"); |
3699d92a KP |
612 | target_fabric_configfs_free(fabric); |
613 | return -1; | |
614 | } | |
615 | ||
616 | /* | |
617 | * Setup our local pointer to *fabric. | |
618 | */ | |
619 | ft_configfs = fabric; | |
620 | return 0; | |
621 | } | |
622 | ||
623 | void ft_deregister_configfs(void) | |
624 | { | |
625 | if (!ft_configfs) | |
626 | return; | |
627 | target_fabric_configfs_deregister(ft_configfs); | |
628 | ft_configfs = NULL; | |
629 | } | |
630 | ||
631 | static struct notifier_block ft_notifier = { | |
632 | .notifier_call = ft_lport_notify | |
633 | }; | |
634 | ||
635 | static int __init ft_init(void) | |
636 | { | |
637 | if (ft_register_configfs()) | |
638 | return -1; | |
639 | if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) { | |
640 | ft_deregister_configfs(); | |
641 | return -1; | |
642 | } | |
643 | blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier); | |
644 | fc_lport_iterate(ft_lport_add, NULL); | |
645 | return 0; | |
646 | } | |
647 | ||
648 | static void __exit ft_exit(void) | |
649 | { | |
650 | blocking_notifier_chain_unregister(&fc_lport_notifier_head, | |
651 | &ft_notifier); | |
652 | fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov); | |
653 | fc_lport_iterate(ft_lport_del, NULL); | |
654 | ft_deregister_configfs(); | |
655 | synchronize_rcu(); | |
656 | } | |
657 | ||
3699d92a KP |
658 | MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION); |
659 | MODULE_LICENSE("GPL"); | |
660 | module_init(ft_init); | |
661 | module_exit(ft_exit); |