1 /*
2  * Export the iSCSI boot info to userland via sysfs.
3  *
4  * Copyright (C) 2010 Red Hat, Inc.  All rights reserved.
5  * Copyright (C) 2010 Mike Christie
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License v2.0 as published by
9  * the Free Software Foundation
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  */
16 
17 #include <linux/module.h>
18 #include <linux/string.h>
19 #include <linux/slab.h>
20 #include <linux/sysfs.h>
21 #include <linux/capability.h>
22 #include <linux/iscsi_boot_sysfs.h>
23 
24 
25 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>");
26 MODULE_DESCRIPTION("sysfs interface and helpers to export iSCSI boot information");
27 MODULE_LICENSE("GPL");
28 /*
29  * The kobject and attribute structures.
30  */
31 struct iscsi_boot_attr {
32 	struct attribute attr;
33 	int type;
34 	ssize_t (*show) (void *data, int type, char *buf);
35 };
36 
37 /*
38  * The routine called for all sysfs attributes.
39  */
40 static ssize_t iscsi_boot_show_attribute(struct kobject *kobj,
41 					 struct attribute *attr, char *buf)
42 {
43 	struct iscsi_boot_kobj *boot_kobj =
44 			container_of(kobj, struct iscsi_boot_kobj, kobj);
45 	struct iscsi_boot_attr *boot_attr =
46 			container_of(attr, struct iscsi_boot_attr, attr);
47 	ssize_t ret = -EIO;
48 	char *str = buf;
49 
50 	if (!capable(CAP_SYS_ADMIN))
51 		return -EACCES;
52 
53 	if (boot_kobj->show)
54 		ret = boot_kobj->show(boot_kobj->data, boot_attr->type, str);
55 	return ret;
56 }
57 
58 static const struct sysfs_ops iscsi_boot_attr_ops = {
59 	.show = iscsi_boot_show_attribute,
60 };
61 
62 static void iscsi_boot_kobj_release(struct kobject *kobj)
63 {
64 	struct iscsi_boot_kobj *boot_kobj =
65 			container_of(kobj, struct iscsi_boot_kobj, kobj);
66 
67 	if (boot_kobj->release)
68 		boot_kobj->release(boot_kobj->data);
69 	kfree(boot_kobj);
70 }
71 
72 static struct kobj_type iscsi_boot_ktype = {
73 	.release = iscsi_boot_kobj_release,
74 	.sysfs_ops = &iscsi_boot_attr_ops,
75 };
76 
77 #define iscsi_boot_rd_attr(fnname, sysfs_name, attr_type)		\
78 static struct iscsi_boot_attr iscsi_boot_attr_##fnname = {	\
79 	.attr	= { .name = __stringify(sysfs_name), .mode = 0444 },	\
80 	.type	= attr_type,						\
81 }
82 
83 /* Target attrs */
84 iscsi_boot_rd_attr(tgt_index, index, ISCSI_BOOT_TGT_INDEX);
85 iscsi_boot_rd_attr(tgt_flags, flags, ISCSI_BOOT_TGT_FLAGS);
86 iscsi_boot_rd_attr(tgt_ip, ip-addr, ISCSI_BOOT_TGT_IP_ADDR);
87 iscsi_boot_rd_attr(tgt_port, port, ISCSI_BOOT_TGT_PORT);
88 iscsi_boot_rd_attr(tgt_lun, lun, ISCSI_BOOT_TGT_LUN);
89 iscsi_boot_rd_attr(tgt_chap, chap-type, ISCSI_BOOT_TGT_CHAP_TYPE);
90 iscsi_boot_rd_attr(tgt_nic, nic-assoc, ISCSI_BOOT_TGT_NIC_ASSOC);
91 iscsi_boot_rd_attr(tgt_name, target-name, ISCSI_BOOT_TGT_NAME);
92 iscsi_boot_rd_attr(tgt_chap_name, chap-name, ISCSI_BOOT_TGT_CHAP_NAME);
93 iscsi_boot_rd_attr(tgt_chap_secret, chap-secret, ISCSI_BOOT_TGT_CHAP_SECRET);
94 iscsi_boot_rd_attr(tgt_chap_rev_name, rev-chap-name,
95 		   ISCSI_BOOT_TGT_REV_CHAP_NAME);
96 iscsi_boot_rd_attr(tgt_chap_rev_secret, rev-chap-name-secret,
97 		   ISCSI_BOOT_TGT_REV_CHAP_SECRET);
98 
99 static struct attribute *target_attrs[] = {
100 	&iscsi_boot_attr_tgt_index.attr,
101 	&iscsi_boot_attr_tgt_flags.attr,
102 	&iscsi_boot_attr_tgt_ip.attr,
103 	&iscsi_boot_attr_tgt_port.attr,
104 	&iscsi_boot_attr_tgt_lun.attr,
105 	&iscsi_boot_attr_tgt_chap.attr,
106 	&iscsi_boot_attr_tgt_nic.attr,
107 	&iscsi_boot_attr_tgt_name.attr,
108 	&iscsi_boot_attr_tgt_chap_name.attr,
109 	&iscsi_boot_attr_tgt_chap_secret.attr,
110 	&iscsi_boot_attr_tgt_chap_rev_name.attr,
111 	&iscsi_boot_attr_tgt_chap_rev_secret.attr,
112 	NULL
113 };
114 
115 static umode_t iscsi_boot_tgt_attr_is_visible(struct kobject *kobj,
116 					     struct attribute *attr, int i)
117 {
118 	struct iscsi_boot_kobj *boot_kobj =
119 			container_of(kobj, struct iscsi_boot_kobj, kobj);
120 
121 	if (attr ==  &iscsi_boot_attr_tgt_index.attr)
122 		return boot_kobj->is_visible(boot_kobj->data,
123 					     ISCSI_BOOT_TGT_INDEX);
124 	else if (attr == &iscsi_boot_attr_tgt_flags.attr)
125 		return boot_kobj->is_visible(boot_kobj->data,
126 					     ISCSI_BOOT_TGT_FLAGS);
127 	else if (attr == &iscsi_boot_attr_tgt_ip.attr)
128 		return boot_kobj->is_visible(boot_kobj->data,
129 					      ISCSI_BOOT_TGT_IP_ADDR);
130 	else if (attr == &iscsi_boot_attr_tgt_port.attr)
131 		return boot_kobj->is_visible(boot_kobj->data,
132 					      ISCSI_BOOT_TGT_PORT);
133 	else if (attr == &iscsi_boot_attr_tgt_lun.attr)
134 		return boot_kobj->is_visible(boot_kobj->data,
135 					      ISCSI_BOOT_TGT_LUN);
136 	else if (attr == &iscsi_boot_attr_tgt_chap.attr)
137 		return boot_kobj->is_visible(boot_kobj->data,
138 					     ISCSI_BOOT_TGT_CHAP_TYPE);
139 	else if (attr == &iscsi_boot_attr_tgt_nic.attr)
140 		return boot_kobj->is_visible(boot_kobj->data,
141 					     ISCSI_BOOT_TGT_NIC_ASSOC);
142 	else if (attr == &iscsi_boot_attr_tgt_name.attr)
143 		return boot_kobj->is_visible(boot_kobj->data,
144 					     ISCSI_BOOT_TGT_NAME);
145 	else if (attr == &iscsi_boot_attr_tgt_chap_name.attr)
146 		return boot_kobj->is_visible(boot_kobj->data,
147 					     ISCSI_BOOT_TGT_CHAP_NAME);
148 	else if (attr == &iscsi_boot_attr_tgt_chap_secret.attr)
149 		return boot_kobj->is_visible(boot_kobj->data,
150 					     ISCSI_BOOT_TGT_CHAP_SECRET);
151 	else if (attr == &iscsi_boot_attr_tgt_chap_rev_name.attr)
152 		return boot_kobj->is_visible(boot_kobj->data,
153 					     ISCSI_BOOT_TGT_REV_CHAP_NAME);
154 	else if (attr == &iscsi_boot_attr_tgt_chap_rev_secret.attr)
155 		return boot_kobj->is_visible(boot_kobj->data,
156 					     ISCSI_BOOT_TGT_REV_CHAP_SECRET);
157 	return 0;
158 }
159 
160 static struct attribute_group iscsi_boot_target_attr_group = {
161 	.attrs = target_attrs,
162 	.is_visible = iscsi_boot_tgt_attr_is_visible,
163 };
164 
165 /* Ethernet attrs */
166 iscsi_boot_rd_attr(eth_index, index, ISCSI_BOOT_ETH_INDEX);
167 iscsi_boot_rd_attr(eth_flags, flags, ISCSI_BOOT_ETH_FLAGS);
168 iscsi_boot_rd_attr(eth_ip, ip-addr, ISCSI_BOOT_ETH_IP_ADDR);
169 iscsi_boot_rd_attr(eth_subnet, subnet-mask, ISCSI_BOOT_ETH_SUBNET_MASK);
170 iscsi_boot_rd_attr(eth_origin, origin, ISCSI_BOOT_ETH_ORIGIN);
171 iscsi_boot_rd_attr(eth_gateway, gateway, ISCSI_BOOT_ETH_GATEWAY);
172 iscsi_boot_rd_attr(eth_primary_dns, primary-dns, ISCSI_BOOT_ETH_PRIMARY_DNS);
173 iscsi_boot_rd_attr(eth_secondary_dns, secondary-dns,
174 		   ISCSI_BOOT_ETH_SECONDARY_DNS);
175 iscsi_boot_rd_attr(eth_dhcp, dhcp, ISCSI_BOOT_ETH_DHCP);
176 iscsi_boot_rd_attr(eth_vlan, vlan, ISCSI_BOOT_ETH_VLAN);
177 iscsi_boot_rd_attr(eth_mac, mac, ISCSI_BOOT_ETH_MAC);
178 iscsi_boot_rd_attr(eth_hostname, hostname, ISCSI_BOOT_ETH_HOSTNAME);
179 
180 static struct attribute *ethernet_attrs[] = {
181 	&iscsi_boot_attr_eth_index.attr,
182 	&iscsi_boot_attr_eth_flags.attr,
183 	&iscsi_boot_attr_eth_ip.attr,
184 	&iscsi_boot_attr_eth_subnet.attr,
185 	&iscsi_boot_attr_eth_origin.attr,
186 	&iscsi_boot_attr_eth_gateway.attr,
187 	&iscsi_boot_attr_eth_primary_dns.attr,
188 	&iscsi_boot_attr_eth_secondary_dns.attr,
189 	&iscsi_boot_attr_eth_dhcp.attr,
190 	&iscsi_boot_attr_eth_vlan.attr,
191 	&iscsi_boot_attr_eth_mac.attr,
192 	&iscsi_boot_attr_eth_hostname.attr,
193 	NULL
194 };
195 
196 static umode_t iscsi_boot_eth_attr_is_visible(struct kobject *kobj,
197 					     struct attribute *attr, int i)
198 {
199 	struct iscsi_boot_kobj *boot_kobj =
200 			container_of(kobj, struct iscsi_boot_kobj, kobj);
201 
202 	if (attr ==  &iscsi_boot_attr_eth_index.attr)
203 		return boot_kobj->is_visible(boot_kobj->data,
204 					     ISCSI_BOOT_ETH_INDEX);
205 	else if (attr ==  &iscsi_boot_attr_eth_flags.attr)
206 		return boot_kobj->is_visible(boot_kobj->data,
207 					     ISCSI_BOOT_ETH_FLAGS);
208 	else if (attr ==  &iscsi_boot_attr_eth_ip.attr)
209 		return boot_kobj->is_visible(boot_kobj->data,
210 					     ISCSI_BOOT_ETH_IP_ADDR);
211 	else if (attr ==  &iscsi_boot_attr_eth_subnet.attr)
212 		return boot_kobj->is_visible(boot_kobj->data,
213 					     ISCSI_BOOT_ETH_SUBNET_MASK);
214 	else if (attr ==  &iscsi_boot_attr_eth_origin.attr)
215 		return boot_kobj->is_visible(boot_kobj->data,
216 					     ISCSI_BOOT_ETH_ORIGIN);
217 	else if (attr ==  &iscsi_boot_attr_eth_gateway.attr)
218 		return boot_kobj->is_visible(boot_kobj->data,
219 					     ISCSI_BOOT_ETH_GATEWAY);
220 	else if (attr ==  &iscsi_boot_attr_eth_primary_dns.attr)
221 		return boot_kobj->is_visible(boot_kobj->data,
222 					     ISCSI_BOOT_ETH_PRIMARY_DNS);
223 	else if (attr ==  &iscsi_boot_attr_eth_secondary_dns.attr)
224 		return boot_kobj->is_visible(boot_kobj->data,
225 					     ISCSI_BOOT_ETH_SECONDARY_DNS);
226 	else if (attr ==  &iscsi_boot_attr_eth_dhcp.attr)
227 		return boot_kobj->is_visible(boot_kobj->data,
228 					     ISCSI_BOOT_ETH_DHCP);
229 	else if (attr ==  &iscsi_boot_attr_eth_vlan.attr)
230 		return boot_kobj->is_visible(boot_kobj->data,
231 					     ISCSI_BOOT_ETH_VLAN);
232 	else if (attr ==  &iscsi_boot_attr_eth_mac.attr)
233 		return boot_kobj->is_visible(boot_kobj->data,
234 					     ISCSI_BOOT_ETH_MAC);
235 	else if (attr ==  &iscsi_boot_attr_eth_hostname.attr)
236 		return boot_kobj->is_visible(boot_kobj->data,
237 					     ISCSI_BOOT_ETH_HOSTNAME);
238 	return 0;
239 }
240 
241 static struct attribute_group iscsi_boot_ethernet_attr_group = {
242 	.attrs = ethernet_attrs,
243 	.is_visible = iscsi_boot_eth_attr_is_visible,
244 };
245 
246 /* Initiator attrs */
247 iscsi_boot_rd_attr(ini_index, index, ISCSI_BOOT_INI_INDEX);
248 iscsi_boot_rd_attr(ini_flags, flags, ISCSI_BOOT_INI_FLAGS);
249 iscsi_boot_rd_attr(ini_isns, isns-server, ISCSI_BOOT_INI_ISNS_SERVER);
250 iscsi_boot_rd_attr(ini_slp, slp-server, ISCSI_BOOT_INI_SLP_SERVER);
251 iscsi_boot_rd_attr(ini_primary_radius, pri-radius-server,
252 		   ISCSI_BOOT_INI_PRI_RADIUS_SERVER);
253 iscsi_boot_rd_attr(ini_secondary_radius, sec-radius-server,
254 		   ISCSI_BOOT_INI_SEC_RADIUS_SERVER);
255 iscsi_boot_rd_attr(ini_name, initiator-name, ISCSI_BOOT_INI_INITIATOR_NAME);
256 
257 static struct attribute *initiator_attrs[] = {
258 	&iscsi_boot_attr_ini_index.attr,
259 	&iscsi_boot_attr_ini_flags.attr,
260 	&iscsi_boot_attr_ini_isns.attr,
261 	&iscsi_boot_attr_ini_slp.attr,
262 	&iscsi_boot_attr_ini_primary_radius.attr,
263 	&iscsi_boot_attr_ini_secondary_radius.attr,
264 	&iscsi_boot_attr_ini_name.attr,
265 	NULL
266 };
267 
268 static umode_t iscsi_boot_ini_attr_is_visible(struct kobject *kobj,
269 					     struct attribute *attr, int i)
270 {
271 	struct iscsi_boot_kobj *boot_kobj =
272 			container_of(kobj, struct iscsi_boot_kobj, kobj);
273 
274 	if (attr ==  &iscsi_boot_attr_ini_index.attr)
275 		return boot_kobj->is_visible(boot_kobj->data,
276 					     ISCSI_BOOT_INI_INDEX);
277 	if (attr ==  &iscsi_boot_attr_ini_flags.attr)
278 		return boot_kobj->is_visible(boot_kobj->data,
279 					     ISCSI_BOOT_INI_FLAGS);
280 	if (attr ==  &iscsi_boot_attr_ini_isns.attr)
281 		return boot_kobj->is_visible(boot_kobj->data,
282 					     ISCSI_BOOT_INI_ISNS_SERVER);
283 	if (attr ==  &iscsi_boot_attr_ini_slp.attr)
284 		return boot_kobj->is_visible(boot_kobj->data,
285 					     ISCSI_BOOT_INI_SLP_SERVER);
286 	if (attr ==  &iscsi_boot_attr_ini_primary_radius.attr)
287 		return boot_kobj->is_visible(boot_kobj->data,
288 					     ISCSI_BOOT_INI_PRI_RADIUS_SERVER);
289 	if (attr ==  &iscsi_boot_attr_ini_secondary_radius.attr)
290 		return boot_kobj->is_visible(boot_kobj->data,
291 					     ISCSI_BOOT_INI_SEC_RADIUS_SERVER);
292 	if (attr ==  &iscsi_boot_attr_ini_name.attr)
293 		return boot_kobj->is_visible(boot_kobj->data,
294 					     ISCSI_BOOT_INI_INITIATOR_NAME);
295 
296 	return 0;
297 }
298 
299 static struct attribute_group iscsi_boot_initiator_attr_group = {
300 	.attrs = initiator_attrs,
301 	.is_visible = iscsi_boot_ini_attr_is_visible,
302 };
303 
304 static struct iscsi_boot_kobj *
305 iscsi_boot_create_kobj(struct iscsi_boot_kset *boot_kset,
306 		       struct attribute_group *attr_group,
307 		       const char *name, int index, void *data,
308 		       ssize_t (*show) (void *data, int type, char *buf),
309 		       umode_t (*is_visible) (void *data, int type),
310 		       void (*release) (void *data))
311 {
312 	struct iscsi_boot_kobj *boot_kobj;
313 
314 	boot_kobj = kzalloc(sizeof(*boot_kobj), GFP_KERNEL);
315 	if (!boot_kobj)
316 		return NULL;
317 	INIT_LIST_HEAD(&boot_kobj->list);
318 
319 	boot_kobj->kobj.kset = boot_kset->kset;
320 	if (kobject_init_and_add(&boot_kobj->kobj, &iscsi_boot_ktype,
321 				 NULL, name, index)) {
322 		kfree(boot_kobj);
323 		return NULL;
324 	}
325 	boot_kobj->data = data;
326 	boot_kobj->show = show;
327 	boot_kobj->is_visible = is_visible;
328 	boot_kobj->release = release;
329 
330 	if (sysfs_create_group(&boot_kobj->kobj, attr_group)) {
331 		/*
332 		 * We do not want to free this because the caller
333 		 * will assume that since the creation call failed
334 		 * the boot kobj was not setup and the normal release
335 		 * path is not being run.
336 		 */
337 		boot_kobj->release = NULL;
338 		kobject_put(&boot_kobj->kobj);
339 		return NULL;
340 	}
341 	boot_kobj->attr_group = attr_group;
342 
343 	kobject_uevent(&boot_kobj->kobj, KOBJ_ADD);
344 	/* Nothing broke so lets add it to the list. */
345 	list_add_tail(&boot_kobj->list, &boot_kset->kobj_list);
346 	return boot_kobj;
347 }
348 
349 static void iscsi_boot_remove_kobj(struct iscsi_boot_kobj *boot_kobj)
350 {
351 	list_del(&boot_kobj->list);
352 	sysfs_remove_group(&boot_kobj->kobj, boot_kobj->attr_group);
353 	kobject_put(&boot_kobj->kobj);
354 }
355 
356 /**
357  * iscsi_boot_create_target() - create boot target sysfs dir
358  * @boot_kset: boot kset
359  * @index: the target id
360  * @data: driver specific data for target
361  * @show: attr show function
362  * @is_visible: attr visibility function
363  * @release: release function
364  *
365  * Note: The boot sysfs lib will free the data passed in for the caller
366  * when all refs to the target kobject have been released.
367  */
368 struct iscsi_boot_kobj *
369 iscsi_boot_create_target(struct iscsi_boot_kset *boot_kset, int index,
370 			 void *data,
371 			 ssize_t (*show) (void *data, int type, char *buf),
372 			 umode_t (*is_visible) (void *data, int type),
373 			 void (*release) (void *data))
374 {
375 	return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_target_attr_group,
376 				      "target%d", index, data, show, is_visible,
377 				      release);
378 }
379 EXPORT_SYMBOL_GPL(iscsi_boot_create_target);
380 
381 /**
382  * iscsi_boot_create_initiator() - create boot initiator sysfs dir
383  * @boot_kset: boot kset
384  * @index: the initiator id
385  * @data: driver specific data
386  * @show: attr show function
387  * @is_visible: attr visibility function
388  * @release: release function
389  *
390  * Note: The boot sysfs lib will free the data passed in for the caller
391  * when all refs to the initiator kobject have been released.
392  */
393 struct iscsi_boot_kobj *
394 iscsi_boot_create_initiator(struct iscsi_boot_kset *boot_kset, int index,
395 			    void *data,
396 			    ssize_t (*show) (void *data, int type, char *buf),
397 			    umode_t (*is_visible) (void *data, int type),
398 			    void (*release) (void *data))
399 {
400 	return iscsi_boot_create_kobj(boot_kset,
401 				      &iscsi_boot_initiator_attr_group,
402 				      "initiator", index, data, show,
403 				      is_visible, release);
404 }
405 EXPORT_SYMBOL_GPL(iscsi_boot_create_initiator);
406 
407 /**
408  * iscsi_boot_create_ethernet() - create boot ethernet sysfs dir
409  * @boot_kset: boot kset
410  * @index: the ethernet device id
411  * @data: driver specific data
412  * @show: attr show function
413  * @is_visible: attr visibility function
414  * @release: release function
415  *
416  * Note: The boot sysfs lib will free the data passed in for the caller
417  * when all refs to the ethernet kobject have been released.
418  */
419 struct iscsi_boot_kobj *
420 iscsi_boot_create_ethernet(struct iscsi_boot_kset *boot_kset, int index,
421 			   void *data,
422 			   ssize_t (*show) (void *data, int type, char *buf),
423 			   umode_t (*is_visible) (void *data, int type),
424 			   void (*release) (void *data))
425 {
426 	return iscsi_boot_create_kobj(boot_kset,
427 				      &iscsi_boot_ethernet_attr_group,
428 				      "ethernet%d", index, data, show,
429 				      is_visible, release);
430 }
431 EXPORT_SYMBOL_GPL(iscsi_boot_create_ethernet);
432 
433 /**
434  * iscsi_boot_create_kset() - creates root sysfs tree
435  * @set_name: name of root dir
436  */
437 struct iscsi_boot_kset *iscsi_boot_create_kset(const char *set_name)
438 {
439 	struct iscsi_boot_kset *boot_kset;
440 
441 	boot_kset = kzalloc(sizeof(*boot_kset), GFP_KERNEL);
442 	if (!boot_kset)
443 		return NULL;
444 
445 	boot_kset->kset = kset_create_and_add(set_name, NULL, firmware_kobj);
446 	if (!boot_kset->kset) {
447 		kfree(boot_kset);
448 		return NULL;
449 	}
450 
451 	INIT_LIST_HEAD(&boot_kset->kobj_list);
452 	return boot_kset;
453 }
454 EXPORT_SYMBOL_GPL(iscsi_boot_create_kset);
455 
456 /**
457  * iscsi_boot_create_host_kset() - creates root sysfs tree for a scsi host
458  * @hostno: host number of scsi host
459  */
460 struct iscsi_boot_kset *iscsi_boot_create_host_kset(unsigned int hostno)
461 {
462 	struct iscsi_boot_kset *boot_kset;
463 	char *set_name;
464 
465 	set_name = kasprintf(GFP_KERNEL, "iscsi_boot%u", hostno);
466 	if (!set_name)
467 		return NULL;
468 
469 	boot_kset = iscsi_boot_create_kset(set_name);
470 	kfree(set_name);
471 	return boot_kset;
472 }
473 EXPORT_SYMBOL_GPL(iscsi_boot_create_host_kset);
474 
475 /**
476  * iscsi_boot_destroy_kset() - destroy kset and kobjects under it
477  * @boot_kset: boot kset
478  *
479  * This will remove the kset and kobjects and attrs under it.
480  */
481 void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset)
482 {
483 	struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;
484 
485 	if (!boot_kset)
486 		return;
487 
488 	list_for_each_entry_safe(boot_kobj, tmp_kobj,
489 				 &boot_kset->kobj_list, list)
490 		iscsi_boot_remove_kobj(boot_kobj);
491 
492 	kset_unregister(boot_kset->kset);
493 	kfree(boot_kset);
494 }
495 EXPORT_SYMBOL_GPL(iscsi_boot_destroy_kset);
496