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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 | ||
9ac8928e | 51 | static const struct target_core_fabric_ops ft_fabric_ops; |
3699d92a | 52 | |
705665da | 53 | static LIST_HEAD(ft_wwn_list); |
3699d92a KP |
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 | */ | |
c7d6a803 | 201 | static int ft_init_nodeacl(struct se_node_acl *nacl, const char *name) |
3699d92a | 202 | { |
c7d6a803 CH |
203 | struct ft_node_acl *acl = |
204 | container_of(nacl, struct ft_node_acl, se_node_acl); | |
3699d92a | 205 | u64 wwpn; |
3699d92a KP |
206 | |
207 | if (ft_parse_wwn(name, &wwpn, 1) < 0) | |
c7d6a803 | 208 | return -EINVAL; |
3699d92a | 209 | |
3699d92a | 210 | acl->node_auth.port_name = wwpn; |
c7d6a803 | 211 | return 0; |
3699d92a KP |
212 | } |
213 | ||
214 | struct ft_node_acl *ft_acl_get(struct ft_tpg *tpg, struct fc_rport_priv *rdata) | |
215 | { | |
216 | struct ft_node_acl *found = NULL; | |
217 | struct ft_node_acl *acl; | |
218 | struct se_portal_group *se_tpg = &tpg->se_tpg; | |
219 | struct se_node_acl *se_acl; | |
220 | ||
28638887 | 221 | spin_lock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
222 | list_for_each_entry(se_acl, &se_tpg->acl_node_list, acl_list) { |
223 | acl = container_of(se_acl, struct ft_node_acl, se_node_acl); | |
6708bb27 | 224 | pr_debug("acl %p port_name %llx\n", |
3699d92a KP |
225 | acl, (unsigned long long)acl->node_auth.port_name); |
226 | if (acl->node_auth.port_name == rdata->ids.port_name || | |
227 | acl->node_auth.node_name == rdata->ids.node_name) { | |
6708bb27 | 228 | pr_debug("acl %p port_name %llx matched\n", acl, |
3699d92a KP |
229 | (unsigned long long)rdata->ids.port_name); |
230 | found = acl; | |
231 | /* XXX need to hold onto ACL */ | |
232 | break; | |
233 | } | |
234 | } | |
28638887 | 235 | spin_unlock_irq(&se_tpg->acl_node_lock); |
3699d92a KP |
236 | return found; |
237 | } | |
238 | ||
594c42e9 | 239 | static struct se_node_acl *ft_tpg_alloc_fabric_acl(struct se_portal_group *se_tpg) |
3699d92a KP |
240 | { |
241 | struct ft_node_acl *acl; | |
242 | ||
243 | acl = kzalloc(sizeof(*acl), GFP_KERNEL); | |
2be18149 | 244 | if (!acl) { |
6708bb27 | 245 | pr_err("Unable to allocate struct ft_node_acl\n"); |
3699d92a KP |
246 | return NULL; |
247 | } | |
6708bb27 | 248 | pr_debug("acl %p\n", acl); |
3699d92a KP |
249 | return &acl->se_node_acl; |
250 | } | |
251 | ||
252 | static void ft_tpg_release_fabric_acl(struct se_portal_group *se_tpg, | |
253 | struct se_node_acl *se_acl) | |
254 | { | |
255 | struct ft_node_acl *acl = container_of(se_acl, | |
256 | struct ft_node_acl, se_node_acl); | |
257 | ||
6708bb27 | 258 | pr_debug("acl %p\n", acl); |
3699d92a KP |
259 | kfree(acl); |
260 | } | |
261 | ||
262 | /* | |
263 | * local_port port_group (tpg) ops. | |
264 | */ | |
265 | static struct se_portal_group *ft_add_tpg( | |
266 | struct se_wwn *wwn, | |
267 | struct config_group *group, | |
268 | const char *name) | |
269 | { | |
705665da | 270 | struct ft_lport_wwn *ft_wwn; |
3699d92a | 271 | struct ft_tpg *tpg; |
06383f10 | 272 | struct workqueue_struct *wq; |
3699d92a KP |
273 | unsigned long index; |
274 | int ret; | |
275 | ||
6708bb27 | 276 | pr_debug("tcm_fc: add tpg %s\n", name); |
3699d92a KP |
277 | |
278 | /* | |
279 | * Name must be "tpgt_" followed by the index. | |
280 | */ | |
281 | if (strstr(name, "tpgt_") != name) | |
282 | return NULL; | |
57103d7f JH |
283 | |
284 | ret = kstrtoul(name + 5, 10, &index); | |
285 | if (ret) | |
286 | return NULL; | |
287 | if (index > UINT_MAX) | |
3699d92a KP |
288 | return NULL; |
289 | ||
d242c1d7 AG |
290 | if ((index != 1)) { |
291 | pr_err("Error, a single TPG=1 is used for HW port mappings\n"); | |
292 | return ERR_PTR(-ENOSYS); | |
293 | } | |
294 | ||
705665da | 295 | ft_wwn = container_of(wwn, struct ft_lport_wwn, se_wwn); |
3699d92a KP |
296 | tpg = kzalloc(sizeof(*tpg), GFP_KERNEL); |
297 | if (!tpg) | |
298 | return NULL; | |
299 | tpg->index = index; | |
705665da | 300 | tpg->lport_wwn = ft_wwn; |
3699d92a | 301 | INIT_LIST_HEAD(&tpg->lun_list); |
3699d92a | 302 | |
06383f10 MR |
303 | wq = alloc_workqueue("tcm_fc", 0, 1); |
304 | if (!wq) { | |
3699d92a KP |
305 | kfree(tpg); |
306 | return NULL; | |
307 | } | |
308 | ||
9ac8928e | 309 | ret = core_tpg_register(&ft_fabric_ops, wwn, &tpg->se_tpg, |
06383f10 MR |
310 | tpg, TRANSPORT_TPG_TYPE_NORMAL); |
311 | if (ret < 0) { | |
312 | destroy_workqueue(wq); | |
3699d92a KP |
313 | kfree(tpg); |
314 | return NULL; | |
315 | } | |
06383f10 | 316 | tpg->workqueue = wq; |
3699d92a KP |
317 | |
318 | mutex_lock(&ft_lport_lock); | |
705665da | 319 | ft_wwn->tpg = tpg; |
3699d92a KP |
320 | mutex_unlock(&ft_lport_lock); |
321 | ||
322 | return &tpg->se_tpg; | |
323 | } | |
324 | ||
325 | static void ft_del_tpg(struct se_portal_group *se_tpg) | |
326 | { | |
327 | struct ft_tpg *tpg = container_of(se_tpg, struct ft_tpg, se_tpg); | |
705665da | 328 | struct ft_lport_wwn *ft_wwn = tpg->lport_wwn; |
3699d92a | 329 | |
6708bb27 | 330 | pr_debug("del tpg %s\n", |
3699d92a KP |
331 | config_item_name(&tpg->se_tpg.tpg_group.cg_item)); |
332 | ||
58fc73d1 | 333 | destroy_workqueue(tpg->workqueue); |
3699d92a KP |
334 | |
335 | /* Wait for sessions to be freed thru RCU, for BUG_ON below */ | |
336 | synchronize_rcu(); | |
337 | ||
338 | mutex_lock(&ft_lport_lock); | |
705665da | 339 | ft_wwn->tpg = NULL; |
3699d92a KP |
340 | if (tpg->tport) { |
341 | tpg->tport->tpg = NULL; | |
342 | tpg->tport = NULL; | |
343 | } | |
344 | mutex_unlock(&ft_lport_lock); | |
345 | ||
346 | core_tpg_deregister(se_tpg); | |
347 | kfree(tpg); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Verify that an lport is configured to use the tcm_fc module, and return | |
352 | * the target port group that should be used. | |
353 | * | |
354 | * The caller holds ft_lport_lock. | |
355 | */ | |
356 | struct ft_tpg *ft_lport_find_tpg(struct fc_lport *lport) | |
357 | { | |
705665da | 358 | struct ft_lport_wwn *ft_wwn; |
3699d92a | 359 | |
705665da AG |
360 | list_for_each_entry(ft_wwn, &ft_wwn_list, ft_wwn_node) { |
361 | if (ft_wwn->wwpn == lport->wwpn) | |
362 | return ft_wwn->tpg; | |
3699d92a KP |
363 | } |
364 | return NULL; | |
365 | } | |
366 | ||
367 | /* | |
368 | * target config instance ops. | |
369 | */ | |
370 | ||
371 | /* | |
372 | * Add lport to allowed config. | |
373 | * The name is the WWPN in lower-case ASCII, colon-separated bytes. | |
374 | */ | |
0d7cb932 | 375 | static struct se_wwn *ft_add_wwn( |
3699d92a KP |
376 | struct target_fabric_configfs *tf, |
377 | struct config_group *group, | |
378 | const char *name) | |
379 | { | |
705665da AG |
380 | struct ft_lport_wwn *ft_wwn; |
381 | struct ft_lport_wwn *old_ft_wwn; | |
3699d92a KP |
382 | u64 wwpn; |
383 | ||
0d7cb932 | 384 | pr_debug("add wwn %s\n", name); |
3699d92a KP |
385 | if (ft_parse_wwn(name, &wwpn, 1) < 0) |
386 | return NULL; | |
705665da AG |
387 | ft_wwn = kzalloc(sizeof(*ft_wwn), GFP_KERNEL); |
388 | if (!ft_wwn) | |
3699d92a | 389 | return NULL; |
705665da | 390 | ft_wwn->wwpn = wwpn; |
3699d92a KP |
391 | |
392 | mutex_lock(&ft_lport_lock); | |
705665da AG |
393 | list_for_each_entry(old_ft_wwn, &ft_wwn_list, ft_wwn_node) { |
394 | if (old_ft_wwn->wwpn == wwpn) { | |
3699d92a | 395 | mutex_unlock(&ft_lport_lock); |
705665da | 396 | kfree(ft_wwn); |
3699d92a KP |
397 | return NULL; |
398 | } | |
399 | } | |
705665da AG |
400 | list_add_tail(&ft_wwn->ft_wwn_node, &ft_wwn_list); |
401 | ft_format_wwn(ft_wwn->name, sizeof(ft_wwn->name), wwpn); | |
3699d92a KP |
402 | mutex_unlock(&ft_lport_lock); |
403 | ||
705665da | 404 | return &ft_wwn->se_wwn; |
3699d92a KP |
405 | } |
406 | ||
0d7cb932 | 407 | static void ft_del_wwn(struct se_wwn *wwn) |
3699d92a | 408 | { |
705665da AG |
409 | struct ft_lport_wwn *ft_wwn = container_of(wwn, |
410 | struct ft_lport_wwn, se_wwn); | |
3699d92a | 411 | |
0d7cb932 | 412 | pr_debug("del wwn %s\n", ft_wwn->name); |
3699d92a | 413 | mutex_lock(&ft_lport_lock); |
705665da | 414 | list_del(&ft_wwn->ft_wwn_node); |
3699d92a KP |
415 | mutex_unlock(&ft_lport_lock); |
416 | ||
705665da | 417 | kfree(ft_wwn); |
3699d92a KP |
418 | } |
419 | ||
420 | static ssize_t ft_wwn_show_attr_version( | |
421 | struct target_fabric_configfs *tf, | |
422 | char *page) | |
423 | { | |
424 | return sprintf(page, "TCM FC " FT_VERSION " on %s/%s on " | |
425 | ""UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); | |
426 | } | |
427 | ||
428 | TF_WWN_ATTR_RO(ft, version); | |
429 | ||
430 | static struct configfs_attribute *ft_wwn_attrs[] = { | |
431 | &ft_wwn_version.attr, | |
432 | NULL, | |
433 | }; | |
434 | ||
435 | static char *ft_get_fabric_name(void) | |
436 | { | |
437 | return "fc"; | |
438 | } | |
439 | ||
440 | static char *ft_get_fabric_wwn(struct se_portal_group *se_tpg) | |
441 | { | |
442 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
443 | ||
705665da | 444 | return tpg->lport_wwn->name; |
3699d92a KP |
445 | } |
446 | ||
447 | static u16 ft_get_tag(struct se_portal_group *se_tpg) | |
448 | { | |
449 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
450 | ||
451 | /* | |
452 | * This tag is used when forming SCSI Name identifier in EVPD=1 0x83 | |
453 | * to represent the SCSI Target Port. | |
454 | */ | |
455 | return tpg->index; | |
456 | } | |
457 | ||
3699d92a KP |
458 | static int ft_check_false(struct se_portal_group *se_tpg) |
459 | { | |
460 | return 0; | |
461 | } | |
462 | ||
463 | static void ft_set_default_node_attr(struct se_node_acl *se_nacl) | |
464 | { | |
465 | } | |
466 | ||
3699d92a KP |
467 | static u32 ft_tpg_get_inst_index(struct se_portal_group *se_tpg) |
468 | { | |
469 | struct ft_tpg *tpg = se_tpg->se_tpg_fabric_ptr; | |
470 | ||
471 | return tpg->index; | |
472 | } | |
473 | ||
9ac8928e CH |
474 | static const struct target_core_fabric_ops ft_fabric_ops = { |
475 | .module = THIS_MODULE, | |
476 | .name = "fc", | |
3699d92a KP |
477 | .get_fabric_name = ft_get_fabric_name, |
478 | .get_fabric_proto_ident = fc_get_fabric_proto_ident, | |
479 | .tpg_get_wwn = ft_get_fabric_wwn, | |
480 | .tpg_get_tag = ft_get_tag, | |
3699d92a KP |
481 | .tpg_get_pr_transport_id = fc_get_pr_transport_id, |
482 | .tpg_get_pr_transport_id_len = fc_get_pr_transport_id_len, | |
483 | .tpg_parse_pr_out_transport_id = fc_parse_pr_out_transport_id, | |
484 | .tpg_check_demo_mode = ft_check_false, | |
485 | .tpg_check_demo_mode_cache = ft_check_false, | |
486 | .tpg_check_demo_mode_write_protect = ft_check_false, | |
487 | .tpg_check_prod_mode_write_protect = ft_check_false, | |
488 | .tpg_alloc_fabric_acl = ft_tpg_alloc_fabric_acl, | |
489 | .tpg_release_fabric_acl = ft_tpg_release_fabric_acl, | |
490 | .tpg_get_inst_index = ft_tpg_get_inst_index, | |
491 | .check_stop_free = ft_check_stop_free, | |
35462975 | 492 | .release_cmd = ft_release_cmd, |
3699d92a KP |
493 | .shutdown_session = ft_sess_shutdown, |
494 | .close_session = ft_sess_close, | |
3699d92a KP |
495 | .sess_get_index = ft_sess_get_index, |
496 | .sess_get_initiator_sid = NULL, | |
497 | .write_pending = ft_write_pending, | |
498 | .write_pending_status = ft_write_pending_status, | |
499 | .set_default_node_attributes = ft_set_default_node_attr, | |
500 | .get_task_tag = ft_get_task_tag, | |
501 | .get_cmd_state = ft_get_cmd_state, | |
3699d92a KP |
502 | .queue_data_in = ft_queue_data_in, |
503 | .queue_status = ft_queue_status, | |
504 | .queue_tm_rsp = ft_queue_tm_resp, | |
131e6abc | 505 | .aborted_task = ft_aborted_task, |
3699d92a KP |
506 | /* |
507 | * Setup function pointers for generic logic in | |
508 | * target_core_fabric_configfs.c | |
509 | */ | |
0d7cb932 AG |
510 | .fabric_make_wwn = &ft_add_wwn, |
511 | .fabric_drop_wwn = &ft_del_wwn, | |
3699d92a KP |
512 | .fabric_make_tpg = &ft_add_tpg, |
513 | .fabric_drop_tpg = &ft_del_tpg, | |
c7d6a803 | 514 | .fabric_init_nodeacl = &ft_init_nodeacl, |
3699d92a | 515 | |
9ac8928e CH |
516 | .tfc_wwn_attrs = ft_wwn_attrs, |
517 | .tfc_tpg_nacl_base_attrs = ft_nacl_base_attrs, | |
518 | }; | |
3699d92a KP |
519 | |
520 | static struct notifier_block ft_notifier = { | |
521 | .notifier_call = ft_lport_notify | |
522 | }; | |
523 | ||
524 | static int __init ft_init(void) | |
525 | { | |
9ac8928e CH |
526 | int ret; |
527 | ||
528 | ret = target_register_template(&ft_fabric_ops); | |
529 | if (ret) | |
530 | goto out; | |
531 | ||
532 | ret = fc_fc4_register_provider(FC_TYPE_FCP, &ft_prov); | |
533 | if (ret) | |
534 | goto out_unregister_template; | |
535 | ||
3699d92a KP |
536 | blocking_notifier_chain_register(&fc_lport_notifier_head, &ft_notifier); |
537 | fc_lport_iterate(ft_lport_add, NULL); | |
538 | return 0; | |
9ac8928e CH |
539 | |
540 | out_unregister_template: | |
541 | target_unregister_template(&ft_fabric_ops); | |
542 | out: | |
543 | return ret; | |
3699d92a KP |
544 | } |
545 | ||
546 | static void __exit ft_exit(void) | |
547 | { | |
548 | blocking_notifier_chain_unregister(&fc_lport_notifier_head, | |
549 | &ft_notifier); | |
550 | fc_fc4_deregister_provider(FC_TYPE_FCP, &ft_prov); | |
551 | fc_lport_iterate(ft_lport_del, NULL); | |
9ac8928e | 552 | target_unregister_template(&ft_fabric_ops); |
3699d92a KP |
553 | synchronize_rcu(); |
554 | } | |
555 | ||
3699d92a KP |
556 | MODULE_DESCRIPTION("FC TCM fabric driver " FT_VERSION); |
557 | MODULE_LICENSE("GPL"); | |
558 | module_init(ft_init); | |
559 | module_exit(ft_exit); |