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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> | |
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; | |
3699d92a KP |
74 | u32 byte = 0; |
75 | u32 pos = 0; | |
76 | u32 err; | |
635a2b3f | 77 | int val; |
3699d92a KP |
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; | |
635a2b3f AS |
98 | val = hex_to_bin(c); |
99 | if (val < 0 || (strict && isupper(c))) | |
3699d92a | 100 | goto fail; |
635a2b3f | 101 | *wwn = (*wwn << 4) | val; |
3699d92a KP |
102 | } |
103 | err = 4; | |
104 | fail: | |
6708bb27 | 105 | pr_debug("err %u len %zu pos %u byte %u\n", |
3699d92a KP |
106 | err, cp - name, pos, byte); |
107 | return -1; | |
108 | } | |
109 | ||
110 | ssize_t ft_format_wwn(char *buf, size_t len, u64 wwn) | |
111 | { | |
112 | u8 b[8]; | |
113 | ||
114 | put_unaligned_be64(wwn, b); | |
115 | return snprintf(buf, len, | |
116 | "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", | |
117 | b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]); | |
118 | } | |
119 | ||
120 | static ssize_t ft_wwn_show(void *arg, char *buf) | |
121 | { | |
122 | u64 *wwn = arg; | |
123 | ssize_t len; | |
124 | ||
125 | len = ft_format_wwn(buf, PAGE_SIZE - 2, *wwn); | |
126 | buf[len++] = '\n'; | |
127 | return len; | |
128 | } | |
129 | ||
130 | static ssize_t ft_wwn_store(void *arg, const char *buf, size_t len) | |
131 | { | |
132 | ssize_t ret; | |
133 | u64 wwn; | |
134 | ||
135 | ret = ft_parse_wwn(buf, &wwn, 0); | |
136 | if (ret > 0) | |
137 | *(u64 *)arg = wwn; | |
138 | return ret; | |
139 | } | |
140 | ||
141 | /* | |
142 | * ACL auth ops. | |
143 | */ | |
144 | ||
145 | static ssize_t ft_nacl_show_port_name( | |
146 | struct se_node_acl *se_nacl, | |
147 | char *page) | |
148 | { | |
149 | struct ft_node_acl *acl = container_of(se_nacl, | |
150 | struct ft_node_acl, se_node_acl); | |
151 | ||
152 | return ft_wwn_show(&acl->node_auth.port_name, page); | |
153 | } | |
154 | ||
155 | static ssize_t ft_nacl_store_port_name( | |
156 | struct se_node_acl *se_nacl, | |
157 | const char *page, | |
158 | size_t count) | |
159 | { | |
160 | struct ft_node_acl *acl = container_of(se_nacl, | |
161 | struct ft_node_acl, se_node_acl); | |
162 | ||
163 | return ft_wwn_store(&acl->node_auth.port_name, page, count); | |
164 | } | |
165 | ||
166 | TF_NACL_BASE_ATTR(ft, port_name, S_IRUGO | S_IWUSR); | |
167 | ||
168 | static ssize_t ft_nacl_show_node_name( | |
169 | struct se_node_acl *se_nacl, | |
170 | char *page) | |
171 | { | |
172 | struct ft_node_acl *acl = container_of(se_nacl, | |
173 | struct ft_node_acl, se_node_acl); | |
174 | ||
175 | return ft_wwn_show(&acl->node_auth.node_name, page); | |
176 | } | |
177 | ||
178 | static ssize_t ft_nacl_store_node_name( | |
179 | struct se_node_acl *se_nacl, | |
180 | const char *page, | |
181 | size_t count) | |
182 | { | |
183 | struct ft_node_acl *acl = container_of(se_nacl, | |
184 | struct ft_node_acl, se_node_acl); | |
185 | ||
186 | return ft_wwn_store(&acl->node_auth.node_name, page, count); | |
187 | } | |
188 | ||
189 | TF_NACL_BASE_ATTR(ft, node_name, S_IRUGO | S_IWUSR); | |
190 | ||
191 | static struct configfs_attribute *ft_nacl_base_attrs[] = { | |
192 | &ft_nacl_port_name.attr, | |
193 | &ft_nacl_node_name.attr, | |
194 | NULL, | |
195 | }; | |
196 | ||
197 | /* | |
198 | * ACL ops. | |
199 | */ | |
200 | ||
201 | /* | |
202 | * Add ACL for an initiator. The ACL is named arbitrarily. | |
203 | * The port_name and/or node_name are attributes. | |
204 | */ | |
205 | static struct se_node_acl *ft_add_acl( | |
206 | struct se_portal_group *se_tpg, | |
207 | struct config_group *group, | |
208 | const char *name) | |
209 | { | |
210 | struct ft_node_acl *acl; | |
211 | struct ft_tpg *tpg; | |
212 | u64 wwpn; | |
213 | u32 q_depth; | |
214 | ||
6708bb27 | 215 | pr_debug("add acl %s\n", name); |
3699d92a KP |
216 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); |
217 | ||
218 | if (ft_parse_wwn(name, &wwpn, 1) < 0) | |
219 | return ERR_PTR(-EINVAL); | |
220 | ||
221 | acl = kzalloc(sizeof(struct ft_node_acl), GFP_KERNEL); | |
2be18149 | 222 | if (!acl) |
3699d92a KP |
223 | return ERR_PTR(-ENOMEM); |
224 | acl->node_auth.port_name = wwpn; | |
225 | ||
226 | q_depth = 32; /* XXX bogus default - get from tpg? */ | |
227 | return core_tpg_add_initiator_node_acl(&tpg->se_tpg, | |
228 | &acl->se_node_acl, name, q_depth); | |
229 | } | |
230 | ||
231 | static void ft_del_acl(struct se_node_acl *se_acl) | |
232 | { | |
233 | struct se_portal_group *se_tpg = se_acl->se_tpg; | |
234 | struct ft_tpg *tpg; | |
235 | struct ft_node_acl *acl = container_of(se_acl, | |
236 | struct ft_node_acl, se_node_acl); | |
237 | ||
6708bb27 | 238 | pr_debug("del acl %s\n", |
3699d92a KP |
239 | config_item_name(&se_acl->acl_group.cg_item)); |
240 | ||
241 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
6708bb27 | 242 | pr_debug("del acl %p se_acl %p tpg %p se_tpg %p\n", |
3699d92a KP |
243 | acl, se_acl, tpg, &tpg->se_tpg); |
244 | ||
245 | core_tpg_del_initiator_node_acl(&tpg->se_tpg, se_acl, 1); | |
246 | kfree(acl); | |
247 | } | |
248 | ||
249 | struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata) | |
250 | { | |
251 | struct ft_node_acl *found = NULL; | |
252 | struct ft_node_acl *acl; | |
253 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
254 | struct se_node_acl *se_acl; | |
255 | ||
28638887 | 256 | spin_lock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
257 | list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) { |
258 | acl = container_of(se_acl, struct ft_node_acl, se_node_acl); | |
6708bb27 | 259 | pr_debug("acl %p port_name %llx\n", |
3699d92a KP |
260 | acl, (unsigned long long)acl->node_auth.port_name); |
261 | if (acl->node_auth.port_name == rdata->ids.port_name || | |
262 | acl->node_auth.node_name == rdata->ids.node_name) { | |
6708bb27 | 263 | pr_debug("acl %p port_name %llx matched\n", acl, |
3699d92a KP |
264 | (unsigned long long)rdata->ids.port_name); |
265 | found = acl; | |
266 | /* XXX need to hold onto ACL */ | |
267 | break; | |
268 | } | |
269 | } | |
28638887 | 270 | spin_unlock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
271 | return found; |
272 | } | |
273 | ||
274 | struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg) | |
275 | { | |
276 | struct ft_node_acl *acl; | |
277 | ||
278 | acl = kzalloc(sizeof(*acl), GFP_KERNEL); | |
2be18149 | 279 | if (!acl) { |
6708bb27 | 280 | pr_err("Unable to allocate struct ft_node_acl\n"); |
3699d92a KP |
281 | return NULL; |
282 | } | |
6708bb27 | 283 | pr_debug("acl %p\n", acl); |
3699d92a KP |
284 | return &acl->se_node_acl; |
285 | } | |
286 | ||
287 | static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg, | |
288 | struct se_node_acl *se_acl) | |
289 | { | |
290 | struct ft_node_acl *acl = container_of(se_acl, | |
291 | struct ft_node_acl, se_node_acl); | |
292 | ||
6708bb27 | 293 | pr_debug("acl %p\n", acl); |
3699d92a KP |
294 | kfree(acl); |
295 | } | |
296 | ||
297 | /* | |
298 | * local_port port_group (tpg) ops. | |
299 | */ | |
300 | static struct se_portal_group *ft_add_tpg( | |
301 | struct se_wwn *wwn, | |
302 | struct config_group *group, | |
303 | const char *name) | |
304 | { | |
305 | struct ft_lport_acl *lacl; | |
306 | struct ft_tpg *tpg; | |
307 | unsigned long index; | |
308 | int ret; | |
309 | ||
6708bb27 | 310 | pr_debug("tcm_fc: add tpg %s\n", name); |
3699d92a KP |
311 | |
312 | /* | |
313 | * Name must be "tpgt_" followed by the index. | |
314 | */ | |
315 | if (strstr(name, "tpgt_") != name) | |
316 | return NULL; | |
317 | if (strict_strtoul(name + 5, 10, &index) || index > UINT_MAX) | |
318 | return NULL; | |
319 | ||
320 | lacl = container_of(wwn, struct ft_lport_acl, fc_lport_wwn); | |
321 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
322 | if (!tpg) | |
323 | return NULL; | |
324 | tpg->index = index; | |
325 | tpg->lport_acl = lacl; | |
326 | INIT_LIST_HEAD(&tpg->lun_list); | |
3699d92a KP |
327 | |
328 | ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg, | |
5951146d | 329 | tpg, TRANSPORT_TPG_TYPE_NORMAL); |
3699d92a KP |
330 | if (ret < 0) { |
331 | kfree(tpg); | |
332 | return NULL; | |
333 | } | |
334 | ||
58fc73d1 CH |
335 | tpg->workqueue = alloc_workqueue("tcm_fc", 0, 1); |
336 | if (!tpg->workqueue) { | |
3699d92a KP |
337 | kfree(tpg); |
338 | return NULL; | |
339 | } | |
340 | ||
341 | mutex_lock(&ft_lport_lock); | |
342 | list_add_tail(&tpg->list, &lacl->tpg_list); | |
343 | mutex_unlock(&ft_lport_lock); | |
344 | ||
345 | return &tpg->se_tpg; | |
346 | } | |
347 | ||
348 | static void ft_del_tpg(struct se_portal_group *se_tpg) | |
349 | { | |
350 | struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
351 | ||
6708bb27 | 352 | pr_debug("del tpg %s\n", |
3699d92a KP |
353 | config_item_name(&tpg->se_tpg.tpg_group.cg_item)); |
354 | ||
58fc73d1 | 355 | destroy_workqueue(tpg->workqueue); |
3699d92a KP |
356 | |
357 | /* Wait for sessions to be freed thru RCU, for BUG_ON below */ | |
358 | synchronize_rcu(); | |
359 | ||
360 | mutex_lock(&ft_lport_lock); | |
361 | list_del(&tpg->list); | |
362 | if (tpg->tport) { | |
363 | tpg->tport->tpg = NULL; | |
364 | tpg->tport = NULL; | |
365 | } | |
366 | mutex_unlock(&ft_lport_lock); | |
367 | ||
368 | core_tpg_deregister(se_tpg); | |
369 | kfree(tpg); | |
370 | } | |
371 | ||
372 | /* | |
373 | * Verify that an lport is configured to use the tcm_fc module, and return | |
374 | * the target port group that should be used. | |
375 | * | |
376 | * The caller holds ft_lport_lock. | |
377 | */ | |
378 | struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport) | |
379 | { | |
380 | struct ft_lport_acl *lacl; | |
381 | struct ft_tpg *tpg; | |
382 | ||
383 | list_for_each_entry(lacl, &ft_lport_list, list) { | |
384 | if (lacl->wwpn == lport->wwpn) { | |
385 | list_for_each_entry(tpg, &lacl->tpg_list, list) | |
386 | return tpg; /* XXX for now return first entry */ | |
387 | return NULL; | |
388 | } | |
389 | } | |
390 | return NULL; | |
391 | } | |
392 | ||
393 | /* | |
394 | * target config instance ops. | |
395 | */ | |
396 | ||
397 | /* | |
398 | * Add lport to allowed config. | |
399 | * The name is the WWPN in lower-case ASCII, colon-separated bytes. | |
400 | */ | |
401 | static struct se_wwn *ft_add_lport( | |
402 | struct target_fabric_configfs *tf, | |
403 | struct config_group *group, | |
404 | const char *name) | |
405 | { | |
406 | struct ft_lport_acl *lacl; | |
407 | struct ft_lport_acl *old_lacl; | |
408 | u64 wwpn; | |
409 | ||
6708bb27 | 410 | pr_debug("add lport %s\n", name); |
3699d92a KP |
411 | if (ft_parse_wwn(name, &wwpn, 1) < 0) |
412 | return NULL; | |
413 | lacl = kzalloc(sizeof(*lacl), GFP_KERNEL); | |
414 | if (!lacl) | |
415 | return NULL; | |
416 | lacl->wwpn = wwpn; | |
417 | INIT_LIST_HEAD(&lacl->tpg_list); | |
418 | ||
419 | mutex_lock(&ft_lport_lock); | |
420 | list_for_each_entry(old_lacl, &ft_lport_list, list) { | |
421 | if (old_lacl->wwpn == wwpn) { | |
422 | mutex_unlock(&ft_lport_lock); | |
423 | kfree(lacl); | |
424 | return NULL; | |
425 | } | |
426 | } | |
427 | list_add_tail(&lacl->list, &ft_lport_list); | |
428 | ft_format_wwn(lacl->name, sizeof(lacl->name), wwpn); | |
429 | mutex_unlock(&ft_lport_lock); | |
430 | ||
431 | return &lacl->fc_lport_wwn; | |
432 | } | |
433 | ||
434 | static void ft_del_lport(struct se_wwn *wwn) | |
435 | { | |
436 | struct ft_lport_acl *lacl = container_of(wwn, | |
437 | struct ft_lport_acl, fc_lport_wwn); | |
438 | ||
6297b07c | 439 | pr_debug("del lport %s\n", lacl->name); |
3699d92a KP |
440 | mutex_lock(&ft_lport_lock); |
441 | list_del(&lacl->list); | |
442 | mutex_unlock(&ft_lport_lock); | |
443 | ||
444 | kfree(lacl); | |
445 | } | |
446 | ||
447 | static ssize_t ft_wwn_show_attr_version( | |
448 | struct target_fabric_configfs *tf, | |
449 | char *page) | |
450 | { | |
451 | return sprintf(page, "TCM FC " FT_VERSION " on %s/%s on " | |
452 | ""UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); | |
453 | } | |
454 | ||
455 | TF_WWN_ATTR_RO(ft, version); | |
456 | ||
457 | static struct configfs_attribute *ft_wwn_attrs[] = { | |
458 | &ft_wwn_version.attr, | |
459 | NULL, | |
460 | }; | |
461 | ||
462 | static char *ft_get_fabric_name(void) | |
463 | { | |
464 | return "fc"; | |
465 | } | |
466 | ||
467 | static char *ft_get_fabric_wwn(struct se_portal_group *se_tpg) | |
468 | { | |
469 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
470 | ||
471 | return tpg->lport_acl->name; | |
472 | } | |
473 | ||
474 | static u16 ft_get_tag(struct se_portal_group *se_tpg) | |
475 | { | |
476 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
477 | ||
478 | /* | |
479 | * This tag is used when forming SCSI Name identifier in EVPD=1 0x83 | |
480 | * to represent the SCSI Target Port. | |
481 | */ | |
482 | return tpg->index; | |
483 | } | |
484 | ||
485 | static u32 ft_get_default_depth(struct se_portal_group *se_tpg) | |
486 | { | |
487 | return 1; | |
488 | } | |
489 | ||
490 | static int ft_check_false(struct se_portal_group *se_tpg) | |
491 | { | |
492 | return 0; | |
493 | } | |
494 | ||
495 | static void ft_set_default_node_attr(struct se_node_acl *se_nacl) | |
496 | { | |
497 | } | |
498 | ||
499 | static u16 ft_get_fabric_sense_len(void) | |
500 | { | |
501 | return 0; | |
502 | } | |
503 | ||
504 | static u16 ft_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_len) | |
505 | { | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
510 | { | |
511 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
512 | ||
513 | return tpg->index; | |
514 | } | |
515 | ||
3699d92a KP |
516 | static struct target_core_fabric_ops ft_fabric_ops = { |
517 | .get_fabric_name = ft_get_fabric_name, | |
518 | .get_fabric_proto_ident = fc_get_fabric_proto_ident, | |
519 | .tpg_get_wwn = ft_get_fabric_wwn, | |
520 | .tpg_get_tag = ft_get_tag, | |
521 | .tpg_get_default_depth = ft_get_default_depth, | |
522 | .tpg_get_pr_transport_id = fc_get_pr_transport_id, | |
523 | .tpg_get_pr_transport_id_len = fc_get_pr_transport_id_len, | |
524 | .tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id, | |
525 | .tpg_check_demo_mode = ft_check_false, | |
526 | .tpg_check_demo_mode_cache = ft_check_false, | |
527 | .tpg_check_demo_mode_write_protect = ft_check_false, | |
528 | .tpg_check_prod_mode_write_protect = ft_check_false, | |
529 | .tpg_alloc_fabric_acl = ft_tpg_alloc_fabric_acl, | |
530 | .tpg_release_fabric_acl = ft_tpg_release_fabric_acl, | |
531 | .tpg_get_inst_index = ft_tpg_get_inst_index, | |
532 | .check_stop_free = ft_check_stop_free, | |
35462975 | 533 | .release_cmd = ft_release_cmd, |
3699d92a KP |
534 | .shutdown_session = ft_sess_shutdown, |
535 | .close_session = ft_sess_close, | |
536 | .stop_session = ft_sess_stop, | |
537 | .fall_back_to_erl0 = ft_sess_set_erl0, | |
538 | .sess_logged_in = ft_sess_logged_in, | |
539 | .sess_get_index = ft_sess_get_index, | |
540 | .sess_get_initiator_sid = NULL, | |
541 | .write_pending = ft_write_pending, | |
542 | .write_pending_status = ft_write_pending_status, | |
543 | .set_default_node_attributes = ft_set_default_node_attr, | |
544 | .get_task_tag = ft_get_task_tag, | |
545 | .get_cmd_state = ft_get_cmd_state, | |
3699d92a KP |
546 | .queue_data_in = ft_queue_data_in, |
547 | .queue_status = ft_queue_status, | |
548 | .queue_tm_rsp = ft_queue_tm_resp, | |
549 | .get_fabric_sense_len = ft_get_fabric_sense_len, | |
550 | .set_fabric_sense_len = ft_set_fabric_sense_len, | |
551 | .is_state_remove = ft_is_state_remove, | |
3699d92a KP |
552 | /* |
553 | * Setup function pointers for generic logic in | |
554 | * target_core_fabric_configfs.c | |
555 | */ | |
556 | .fabric_make_wwn = &ft_add_lport, | |
557 | .fabric_drop_wwn = &ft_del_lport, | |
558 | .fabric_make_tpg = &ft_add_tpg, | |
559 | .fabric_drop_tpg = &ft_del_tpg, | |
560 | .fabric_post_link = NULL, | |
561 | .fabric_pre_unlink = NULL, | |
562 | .fabric_make_np = NULL, | |
563 | .fabric_drop_np = NULL, | |
564 | .fabric_make_nodeacl = &ft_add_acl, | |
565 | .fabric_drop_nodeacl = &ft_del_acl, | |
566 | }; | |
567 | ||
568 | int ft_register_configfs(void) | |
569 | { | |
570 | struct target_fabric_configfs *fabric; | |
571 | int ret; | |
572 | ||
573 | /* | |
574 | * Register the top level struct config_item_type with TCM core | |
575 | */ | |
576 | fabric = target_fabric_configfs_init(THIS_MODULE, "fc"); | |
e3d6f909 | 577 | if (IS_ERR(fabric)) { |
6708bb27 | 578 | pr_err("%s: target_fabric_configfs_init() failed!\n", |
3699d92a | 579 | __func__); |
e3d6f909 | 580 | return PTR_ERR(fabric); |
3699d92a KP |
581 | } |
582 | fabric->tf_ops = ft_fabric_ops; | |
583 | ||
584 | /* Allowing support for task_sg_chaining */ | |
585 | fabric->tf_ops.task_sg_chaining = 1; | |
586 | ||
587 | /* | |
588 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
589 | */ | |
590 | TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = ft_wwn_attrs; | |
591 | TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL; | |
592 | TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; | |
593 | TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; | |
594 | TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; | |
595 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = | |
596 | ft_nacl_base_attrs; | |
597 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL; | |
598 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL; | |
599 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL; | |
600 | /* | |
601 | * register the fabric for use within TCM | |
602 | */ | |
603 | ret = target_fabric_configfs_register(fabric); | |
604 | if (ret < 0) { | |
6708bb27 | 605 | pr_debug("target_fabric_configfs_register() for" |
3699d92a | 606 | " FC Target failed!\n"); |
3699d92a KP |
607 | target_fabric_configfs_free(fabric); |
608 | return -1; | |
609 | } | |
610 | ||
611 | /* | |
612 | * Setup our local pointer to *fabric. | |
613 | */ | |
614 | ft_configfs = fabric; | |
615 | return 0; | |
616 | } | |
617 | ||
618 | void ft_deregister_configfs(void) | |
619 | { | |
620 | if (!ft_configfs) | |
621 | return; | |
622 | target_fabric_configfs_deregister(ft_configfs); | |
623 | ft_configfs = NULL; | |
624 | } | |
625 | ||
626 | static struct notifier_block ft_notifier = { | |
627 | .notifier_call = ft_lport_notify | |
628 | }; | |
629 | ||
630 | static int __init ft_init(void) | |
631 | { | |
632 | if (ft_register_configfs()) | |
633 | return -1; | |
634 | if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) { | |
635 | ft_deregister_configfs(); | |
636 | return -1; | |
637 | } | |
638 | blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier); | |
639 | fc_lport_iterate(ft_lport_add, NULL); | |
640 | return 0; | |
641 | } | |
642 | ||
643 | static void __exit ft_exit(void) | |
644 | { | |
645 | blocking_notifier_chain_unregister(&fc_lport_notifier_head, | |
646 | &ft_notifier); | |
647 | fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov); | |
648 | fc_lport_iterate(ft_lport_del, NULL); | |
649 | ft_deregister_configfs(); | |
650 | synchronize_rcu(); | |
651 | } | |
652 | ||
3699d92a KP |
653 | MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION); |
654 | MODULE_LICENSE("GPL"); | |
655 | module_init(ft_init); | |
656 | module_exit(ft_exit); |