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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> | |
34 | #include <linux/ctype.h> | |
35 | #include <asm/unaligned.h> | |
36 | #include <scsi/scsi.h> | |
37 | #include <scsi/scsi_host.h> | |
38 | #include <scsi/scsi_device.h> | |
39 | #include <scsi/scsi_cmnd.h> | |
40 | #include <scsi/libfc.h> | |
41 | ||
42 | #include <target/target_core_base.h> | |
43 | #include <target/target_core_transport.h> | |
44 | #include <target/target_core_fabric_ops.h> | |
45 | #include <target/target_core_fabric_configfs.h> | |
46 | #include <target/target_core_fabric_lib.h> | |
47 | #include <target/target_core_device.h> | |
48 | #include <target/target_core_tpg.h> | |
49 | #include <target/target_core_configfs.h> | |
3699d92a KP |
50 | #include <target/configfs_macros.h> |
51 | ||
52 | #include "tcm_fc.h" | |
53 | ||
54 | struct target_fabric_configfs *ft_configfs; | |
55 | ||
56 | LIST_HEAD(ft_lport_list); | |
57 | DEFINE_MUTEX(ft_lport_lock); | |
58 | ||
59 | unsigned int ft_debug_logging; | |
60 | module_param_named(debug_logging, ft_debug_logging, int, S_IRUGO|S_IWUSR); | |
61 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
62 | ||
63 | /* | |
64 | * Parse WWN. | |
65 | * If strict, we require lower-case hex and colon separators to be sure | |
66 | * the name is the same as what would be generated by ft_format_wwn() | |
67 | * so the name and wwn are mapped one-to-one. | |
68 | */ | |
69 | static ssize_t ft_parse_wwn(const char *name, u64 *wwn, int strict) | |
70 | { | |
71 | const char *cp; | |
72 | char c; | |
73 | u32 nibble; | |
74 | u32 byte = 0; | |
75 | u32 pos = 0; | |
76 | u32 err; | |
77 | ||
78 | *wwn = 0; | |
79 | for (cp = name; cp < &name[FT_NAMELEN - 1]; cp++) { | |
80 | c = *cp; | |
81 | if (c == '\n' && cp[1] == '\0') | |
82 | continue; | |
83 | if (strict && pos++ == 2 && byte++ < 7) { | |
84 | pos = 0; | |
85 | if (c == ':') | |
86 | continue; | |
87 | err = 1; | |
88 | goto fail; | |
89 | } | |
90 | if (c == '\0') { | |
91 | err = 2; | |
92 | if (strict && byte != 8) | |
93 | goto fail; | |
94 | return cp - name; | |
95 | } | |
96 | err = 3; | |
97 | if (isdigit(c)) | |
98 | nibble = c - '0'; | |
99 | else if (isxdigit(c) && (islower(c) || !strict)) | |
100 | nibble = tolower(c) - 'a' + 10; | |
101 | else | |
102 | goto fail; | |
103 | *wwn = (*wwn << 4) | nibble; | |
104 | } | |
105 | err = 4; | |
106 | fail: | |
6708bb27 | 107 | pr_debug("err %u len %zu pos %u byte %u\n", |
3699d92a KP |
108 | err, cp - name, pos, byte); |
109 | return -1; | |
110 | } | |
111 | ||
112 | ssize_t ft_format_wwn(char *buf, size_t len, u64 wwn) | |
113 | { | |
114 | u8 b[8]; | |
115 | ||
116 | put_unaligned_be64(wwn, b); | |
117 | return snprintf(buf, len, | |
118 | "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", | |
119 | b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]); | |
120 | } | |
121 | ||
122 | static ssize_t ft_wwn_show(void *arg, char *buf) | |
123 | { | |
124 | u64 *wwn = arg; | |
125 | ssize_t len; | |
126 | ||
127 | len = ft_format_wwn(buf, PAGE_SIZE - 2, *wwn); | |
128 | buf[len++] = '\n'; | |
129 | return len; | |
130 | } | |
131 | ||
132 | static ssize_t ft_wwn_store(void *arg, const char *buf, size_t len) | |
133 | { | |
134 | ssize_t ret; | |
135 | u64 wwn; | |
136 | ||
137 | ret = ft_parse_wwn(buf, &wwn, 0); | |
138 | if (ret > 0) | |
139 | *(u64 *)arg = wwn; | |
140 | return ret; | |
141 | } | |
142 | ||
143 | /* | |
144 | * ACL auth ops. | |
145 | */ | |
146 | ||
147 | static ssize_t ft_nacl_show_port_name( | |
148 | struct se_node_acl *se_nacl, | |
149 | char *page) | |
150 | { | |
151 | struct ft_node_acl *acl = container_of(se_nacl, | |
152 | struct ft_node_acl, se_node_acl); | |
153 | ||
154 | return ft_wwn_show(&acl->node_auth.port_name, page); | |
155 | } | |
156 | ||
157 | static ssize_t ft_nacl_store_port_name( | |
158 | struct se_node_acl *se_nacl, | |
159 | const char *page, | |
160 | size_t count) | |
161 | { | |
162 | struct ft_node_acl *acl = container_of(se_nacl, | |
163 | struct ft_node_acl, se_node_acl); | |
164 | ||
165 | return ft_wwn_store(&acl->node_auth.port_name, page, count); | |
166 | } | |
167 | ||
168 | TF_NACL_BASE_ATTR(ft, port_name, S_IRUGO | S_IWUSR); | |
169 | ||
170 | static ssize_t ft_nacl_show_node_name( | |
171 | struct se_node_acl *se_nacl, | |
172 | char *page) | |
173 | { | |
174 | struct ft_node_acl *acl = container_of(se_nacl, | |
175 | struct ft_node_acl, se_node_acl); | |
176 | ||
177 | return ft_wwn_show(&acl->node_auth.node_name, page); | |
178 | } | |
179 | ||
180 | static ssize_t ft_nacl_store_node_name( | |
181 | struct se_node_acl *se_nacl, | |
182 | const char *page, | |
183 | size_t count) | |
184 | { | |
185 | struct ft_node_acl *acl = container_of(se_nacl, | |
186 | struct ft_node_acl, se_node_acl); | |
187 | ||
188 | return ft_wwn_store(&acl->node_auth.node_name, page, count); | |
189 | } | |
190 | ||
191 | TF_NACL_BASE_ATTR(ft, node_name, S_IRUGO | S_IWUSR); | |
192 | ||
193 | static struct configfs_attribute *ft_nacl_base_attrs[] = { | |
194 | &ft_nacl_port_name.attr, | |
195 | &ft_nacl_node_name.attr, | |
196 | NULL, | |
197 | }; | |
198 | ||
199 | /* | |
200 | * ACL ops. | |
201 | */ | |
202 | ||
203 | /* | |
204 | * Add ACL for an initiator. The ACL is named arbitrarily. | |
205 | * The port_name and/or node_name are attributes. | |
206 | */ | |
207 | static struct se_node_acl *ft_add_acl( | |
208 | struct se_portal_group *se_tpg, | |
209 | struct config_group *group, | |
210 | const char *name) | |
211 | { | |
212 | struct ft_node_acl *acl; | |
213 | struct ft_tpg *tpg; | |
214 | u64 wwpn; | |
215 | u32 q_depth; | |
216 | ||
6708bb27 | 217 | pr_debug("add acl %s\n", name); |
3699d92a KP |
218 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); |
219 | ||
220 | if (ft_parse_wwn(name, &wwpn, 1) < 0) | |
221 | return ERR_PTR(-EINVAL); | |
222 | ||
223 | acl = kzalloc(sizeof(struct ft_node_acl), GFP_KERNEL); | |
2be18149 | 224 | if (!acl) |
3699d92a KP |
225 | return ERR_PTR(-ENOMEM); |
226 | acl->node_auth.port_name = wwpn; | |
227 | ||
228 | q_depth = 32; /* XXX bogus default - get from tpg? */ | |
229 | return core_tpg_add_initiator_node_acl(&tpg->se_tpg, | |
230 | &acl->se_node_acl, name, q_depth); | |
231 | } | |
232 | ||
233 | static void ft_del_acl(struct se_node_acl *se_acl) | |
234 | { | |
235 | struct se_portal_group *se_tpg = se_acl->se_tpg; | |
236 | struct ft_tpg *tpg; | |
237 | struct ft_node_acl *acl = container_of(se_acl, | |
238 | struct ft_node_acl, se_node_acl); | |
239 | ||
6708bb27 | 240 | pr_debug("del acl %s\n", |
3699d92a KP |
241 | config_item_name(&se_acl->acl_group.cg_item)); |
242 | ||
243 | tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
6708bb27 | 244 | pr_debug("del acl %p se_acl %p tpg %p se_tpg %p\n", |
3699d92a KP |
245 | acl, se_acl, tpg, &tpg->se_tpg); |
246 | ||
247 | core_tpg_del_initiator_node_acl(&tpg->se_tpg, se_acl, 1); | |
248 | kfree(acl); | |
249 | } | |
250 | ||
251 | struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata) | |
252 | { | |
253 | struct ft_node_acl *found = NULL; | |
254 | struct ft_node_acl *acl; | |
255 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
256 | struct se_node_acl *se_acl; | |
257 | ||
28638887 | 258 | spin_lock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
259 | list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) { |
260 | acl = container_of(se_acl, struct ft_node_acl, se_node_acl); | |
6708bb27 | 261 | pr_debug("acl %p port_name %llx\n", |
3699d92a KP |
262 | acl, (unsigned long long)acl->node_auth.port_name); |
263 | if (acl->node_auth.port_name == rdata->ids.port_name || | |
264 | acl->node_auth.node_name == rdata->ids.node_name) { | |
6708bb27 | 265 | pr_debug("acl %p port_name %llx matched\n", acl, |
3699d92a KP |
266 | (unsigned long long)rdata->ids.port_name); |
267 | found = acl; | |
268 | /* XXX need to hold onto ACL */ | |
269 | break; | |
270 | } | |
271 | } | |
28638887 | 272 | spin_unlock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
273 | return found; |
274 | } | |
275 | ||
276 | struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg) | |
277 | { | |
278 | struct ft_node_acl *acl; | |
279 | ||
280 | acl = kzalloc(sizeof(*acl), GFP_KERNEL); | |
2be18149 | 281 | if (!acl) { |
6708bb27 | 282 | pr_err("Unable to allocate struct ft_node_acl\n"); |
3699d92a KP |
283 | return NULL; |
284 | } | |
6708bb27 | 285 | pr_debug("acl %p\n", acl); |
3699d92a KP |
286 | return &acl->se_node_acl; |
287 | } | |
288 | ||
289 | static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg, | |
290 | struct se_node_acl *se_acl) | |
291 | { | |
292 | struct ft_node_acl *acl = container_of(se_acl, | |
293 | struct ft_node_acl, se_node_acl); | |
294 | ||
6708bb27 | 295 | pr_debug("acl %p\n", acl); |
3699d92a KP |
296 | kfree(acl); |
297 | } | |
298 | ||
299 | /* | |
300 | * local_port port_group (tpg) ops. | |
301 | */ | |
302 | static struct se_portal_group *ft_add_tpg( | |
303 | struct se_wwn *wwn, | |
304 | struct config_group *group, | |
305 | const char *name) | |
306 | { | |
307 | struct ft_lport_acl *lacl; | |
308 | struct ft_tpg *tpg; | |
309 | unsigned long index; | |
310 | int ret; | |
311 | ||
6708bb27 | 312 | pr_debug("tcm_fc: add tpg %s\n", name); |
3699d92a KP |
313 | |
314 | /* | |
315 | * Name must be "tpgt_" followed by the index. | |
316 | */ | |
317 | if (strstr(name, "tpgt_") != name) | |
318 | return NULL; | |
319 | if (strict_strtoul(name + 5, 10, &index) || index > UINT_MAX) | |
320 | return NULL; | |
321 | ||
322 | lacl = container_of(wwn, struct ft_lport_acl, fc_lport_wwn); | |
323 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); | |
324 | if (!tpg) | |
325 | return NULL; | |
326 | tpg->index = index; | |
327 | tpg->lport_acl = lacl; | |
328 | INIT_LIST_HEAD(&tpg->lun_list); | |
3699d92a KP |
329 | |
330 | ret = core_tpg_register(&ft_configfs->tf_ops, wwn, &tpg->se_tpg, | |
5951146d | 331 | tpg, TRANSPORT_TPG_TYPE_NORMAL); |
3699d92a KP |
332 | if (ret < 0) { |
333 | kfree(tpg); | |
334 | return NULL; | |
335 | } | |
336 | ||
58fc73d1 CH |
337 | tpg->workqueue = alloc_workqueue("tcm_fc", 0, 1); |
338 | if (!tpg->workqueue) { | |
3699d92a KP |
339 | kfree(tpg); |
340 | return NULL; | |
341 | } | |
342 | ||
343 | mutex_lock(&ft_lport_lock); | |
344 | list_add_tail(&tpg->list, &lacl->tpg_list); | |
345 | mutex_unlock(&ft_lport_lock); | |
346 | ||
347 | return &tpg->se_tpg; | |
348 | } | |
349 | ||
350 | static void ft_del_tpg(struct se_portal_group *se_tpg) | |
351 | { | |
352 | struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
353 | ||
6708bb27 | 354 | pr_debug("del tpg %s\n", |
3699d92a KP |
355 | config_item_name(&tpg->se_tpg.tpg_group.cg_item)); |
356 | ||
58fc73d1 | 357 | destroy_workqueue(tpg->workqueue); |
3699d92a KP |
358 | |
359 | /* Wait for sessions to be freed thru RCU, for BUG_ON below */ | |
360 | synchronize_rcu(); | |
361 | ||
362 | mutex_lock(&ft_lport_lock); | |
363 | list_del(&tpg->list); | |
364 | if (tpg->tport) { | |
365 | tpg->tport->tpg = NULL; | |
366 | tpg->tport = NULL; | |
367 | } | |
368 | mutex_unlock(&ft_lport_lock); | |
369 | ||
370 | core_tpg_deregister(se_tpg); | |
371 | kfree(tpg); | |
372 | } | |
373 | ||
374 | /* | |
375 | * Verify that an lport is configured to use the tcm_fc module, and return | |
376 | * the target port group that should be used. | |
377 | * | |
378 | * The caller holds ft_lport_lock. | |
379 | */ | |
380 | struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport) | |
381 | { | |
382 | struct ft_lport_acl *lacl; | |
383 | struct ft_tpg *tpg; | |
384 | ||
385 | list_for_each_entry(lacl, &ft_lport_list, list) { | |
386 | if (lacl->wwpn == lport->wwpn) { | |
387 | list_for_each_entry(tpg, &lacl->tpg_list, list) | |
388 | return tpg; /* XXX for now return first entry */ | |
389 | return NULL; | |
390 | } | |
391 | } | |
392 | return NULL; | |
393 | } | |
394 | ||
395 | /* | |
396 | * target config instance ops. | |
397 | */ | |
398 | ||
399 | /* | |
400 | * Add lport to allowed config. | |
401 | * The name is the WWPN in lower-case ASCII, colon-separated bytes. | |
402 | */ | |
403 | static struct se_wwn *ft_add_lport( | |
404 | struct target_fabric_configfs *tf, | |
405 | struct config_group *group, | |
406 | const char *name) | |
407 | { | |
408 | struct ft_lport_acl *lacl; | |
409 | struct ft_lport_acl *old_lacl; | |
410 | u64 wwpn; | |
411 | ||
6708bb27 | 412 | pr_debug("add lport %s\n", name); |
3699d92a KP |
413 | if (ft_parse_wwn(name, &wwpn, 1) < 0) |
414 | return NULL; | |
415 | lacl = kzalloc(sizeof(*lacl), GFP_KERNEL); | |
416 | if (!lacl) | |
417 | return NULL; | |
418 | lacl->wwpn = wwpn; | |
419 | INIT_LIST_HEAD(&lacl->tpg_list); | |
420 | ||
421 | mutex_lock(&ft_lport_lock); | |
422 | list_for_each_entry(old_lacl, &ft_lport_list, list) { | |
423 | if (old_lacl->wwpn == wwpn) { | |
424 | mutex_unlock(&ft_lport_lock); | |
425 | kfree(lacl); | |
426 | return NULL; | |
427 | } | |
428 | } | |
429 | list_add_tail(&lacl->list, &ft_lport_list); | |
430 | ft_format_wwn(lacl->name, sizeof(lacl->name), wwpn); | |
431 | mutex_unlock(&ft_lport_lock); | |
432 | ||
433 | return &lacl->fc_lport_wwn; | |
434 | } | |
435 | ||
436 | static void ft_del_lport(struct se_wwn *wwn) | |
437 | { | |
438 | struct ft_lport_acl *lacl = container_of(wwn, | |
439 | struct ft_lport_acl, fc_lport_wwn); | |
440 | ||
6708bb27 | 441 | pr_debug("del lport %s\n", |
3699d92a KP |
442 | config_item_name(&wwn->wwn_group.cg_item)); |
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 | ||
502 | static u16 ft_get_fabric_sense_len(void) | |
503 | { | |
504 | return 0; | |
505 | } | |
506 | ||
507 | static u16 ft_set_fabric_sense_len(struct se_cmd *se_cmd, u32 sense_len) | |
508 | { | |
509 | return 0; | |
510 | } | |
511 | ||
512 | static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg) | |
513 | { | |
514 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
515 | ||
516 | return tpg->index; | |
517 | } | |
518 | ||
3699d92a KP |
519 | static struct target_core_fabric_ops ft_fabric_ops = { |
520 | .get_fabric_name = ft_get_fabric_name, | |
521 | .get_fabric_proto_ident = fc_get_fabric_proto_ident, | |
522 | .tpg_get_wwn = ft_get_fabric_wwn, | |
523 | .tpg_get_tag = ft_get_tag, | |
524 | .tpg_get_default_depth = ft_get_default_depth, | |
525 | .tpg_get_pr_transport_id = fc_get_pr_transport_id, | |
526 | .tpg_get_pr_transport_id_len = fc_get_pr_transport_id_len, | |
527 | .tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id, | |
528 | .tpg_check_demo_mode = ft_check_false, | |
529 | .tpg_check_demo_mode_cache = ft_check_false, | |
530 | .tpg_check_demo_mode_write_protect = ft_check_false, | |
531 | .tpg_check_prod_mode_write_protect = ft_check_false, | |
532 | .tpg_alloc_fabric_acl = ft_tpg_alloc_fabric_acl, | |
533 | .tpg_release_fabric_acl = ft_tpg_release_fabric_acl, | |
534 | .tpg_get_inst_index = ft_tpg_get_inst_index, | |
535 | .check_stop_free = ft_check_stop_free, | |
35462975 | 536 | .release_cmd = ft_release_cmd, |
3699d92a KP |
537 | .shutdown_session = ft_sess_shutdown, |
538 | .close_session = ft_sess_close, | |
539 | .stop_session = ft_sess_stop, | |
540 | .fall_back_to_erl0 = ft_sess_set_erl0, | |
541 | .sess_logged_in = ft_sess_logged_in, | |
542 | .sess_get_index = ft_sess_get_index, | |
543 | .sess_get_initiator_sid = NULL, | |
544 | .write_pending = ft_write_pending, | |
545 | .write_pending_status = ft_write_pending_status, | |
546 | .set_default_node_attributes = ft_set_default_node_attr, | |
547 | .get_task_tag = ft_get_task_tag, | |
548 | .get_cmd_state = ft_get_cmd_state, | |
3699d92a KP |
549 | .queue_data_in = ft_queue_data_in, |
550 | .queue_status = ft_queue_status, | |
551 | .queue_tm_rsp = ft_queue_tm_resp, | |
552 | .get_fabric_sense_len = ft_get_fabric_sense_len, | |
553 | .set_fabric_sense_len = ft_set_fabric_sense_len, | |
554 | .is_state_remove = ft_is_state_remove, | |
3699d92a KP |
555 | /* |
556 | * Setup function pointers for generic logic in | |
557 | * target_core_fabric_configfs.c | |
558 | */ | |
559 | .fabric_make_wwn = &ft_add_lport, | |
560 | .fabric_drop_wwn = &ft_del_lport, | |
561 | .fabric_make_tpg = &ft_add_tpg, | |
562 | .fabric_drop_tpg = &ft_del_tpg, | |
563 | .fabric_post_link = NULL, | |
564 | .fabric_pre_unlink = NULL, | |
565 | .fabric_make_np = NULL, | |
566 | .fabric_drop_np = NULL, | |
567 | .fabric_make_nodeacl = &ft_add_acl, | |
568 | .fabric_drop_nodeacl = &ft_del_acl, | |
569 | }; | |
570 | ||
571 | int ft_register_configfs(void) | |
572 | { | |
573 | struct target_fabric_configfs *fabric; | |
574 | int ret; | |
575 | ||
576 | /* | |
577 | * Register the top level struct config_item_type with TCM core | |
578 | */ | |
579 | fabric = target_fabric_configfs_init(THIS_MODULE, "fc"); | |
e3d6f909 | 580 | if (IS_ERR(fabric)) { |
6708bb27 | 581 | pr_err("%s: target_fabric_configfs_init() failed!\n", |
3699d92a | 582 | __func__); |
e3d6f909 | 583 | return PTR_ERR(fabric); |
3699d92a KP |
584 | } |
585 | fabric->tf_ops = ft_fabric_ops; | |
586 | ||
587 | /* Allowing support for task_sg_chaining */ | |
588 | fabric->tf_ops.task_sg_chaining = 1; | |
589 | ||
590 | /* | |
591 | * Setup default attribute lists for various fabric->tf_cit_tmpl | |
592 | */ | |
593 | TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = ft_wwn_attrs; | |
594 | TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = NULL; | |
595 | TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL; | |
596 | TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL; | |
597 | TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL; | |
598 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = | |
599 | ft_nacl_base_attrs; | |
600 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL; | |
601 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL; | |
602 | TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL; | |
603 | /* | |
604 | * register the fabric for use within TCM | |
605 | */ | |
606 | ret = target_fabric_configfs_register(fabric); | |
607 | if (ret < 0) { | |
6708bb27 | 608 | pr_debug("target_fabric_configfs_register() for" |
3699d92a | 609 | " FC Target failed!\n"); |
3699d92a KP |
610 | target_fabric_configfs_free(fabric); |
611 | return -1; | |
612 | } | |
613 | ||
614 | /* | |
615 | * Setup our local pointer to *fabric. | |
616 | */ | |
617 | ft_configfs = fabric; | |
618 | return 0; | |
619 | } | |
620 | ||
621 | void ft_deregister_configfs(void) | |
622 | { | |
623 | if (!ft_configfs) | |
624 | return; | |
625 | target_fabric_configfs_deregister(ft_configfs); | |
626 | ft_configfs = NULL; | |
627 | } | |
628 | ||
629 | static struct notifier_block ft_notifier = { | |
630 | .notifier_call = ft_lport_notify | |
631 | }; | |
632 | ||
633 | static int __init ft_init(void) | |
634 | { | |
635 | if (ft_register_configfs()) | |
636 | return -1; | |
637 | if (fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov)) { | |
638 | ft_deregister_configfs(); | |
639 | return -1; | |
640 | } | |
641 | blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier); | |
642 | fc_lport_iterate(ft_lport_add, NULL); | |
643 | return 0; | |
644 | } | |
645 | ||
646 | static void __exit ft_exit(void) | |
647 | { | |
648 | blocking_notifier_chain_unregister(&fc_lport_notifier_head, | |
649 | &ft_notifier); | |
650 | fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov); | |
651 | fc_lport_iterate(ft_lport_del, NULL); | |
652 | ft_deregister_configfs(); | |
653 | synchronize_rcu(); | |
654 | } | |
655 | ||
3699d92a KP |
656 | MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION); |
657 | MODULE_LICENSE("GPL"); | |
658 | module_init(ft_init); | |
659 | module_exit(ft_exit); |