1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Export the iSCSI boot info to userland via sysfs.
4 *
5 * Copyright (C) 2010 Red Hat, Inc. All rights reserved.
6 * Copyright (C) 2010 Mike Christie
7 */
8
9 #include <linux/module.h>
10 #include <linux/string.h>
11 #include <linux/slab.h>
12 #include <linux/sysfs.h>
13 #include <linux/capability.h>
14 #include <linux/iscsi_boot_sysfs.h>
15
16
17 MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>");
18 MODULE_DESCRIPTION("sysfs interface and helpers to export iSCSI boot information");
19 MODULE_LICENSE("GPL");
20 /*
21 * The kobject and attribute structures.
22 */
23 struct iscsi_boot_attr {
24 struct attribute attr;
25 int type;
26 ssize_t (*show) (void *data, int type, char *buf);
27 };
28
29 /*
30 * The routine called for all sysfs attributes.
31 */
iscsi_boot_show_attribute(struct kobject * kobj,struct attribute * attr,char * buf)32 static ssize_t iscsi_boot_show_attribute(struct kobject *kobj,
33 struct attribute *attr, char *buf)
34 {
35 struct iscsi_boot_kobj *boot_kobj =
36 container_of(kobj, struct iscsi_boot_kobj, kobj);
37 struct iscsi_boot_attr *boot_attr =
38 container_of(attr, struct iscsi_boot_attr, attr);
39 ssize_t ret = -EIO;
40 char *str = buf;
41
42 if (!capable(CAP_SYS_ADMIN))
43 return -EACCES;
44
45 if (boot_kobj->show)
46 ret = boot_kobj->show(boot_kobj->data, boot_attr->type, str);
47 return ret;
48 }
49
50 static const struct sysfs_ops iscsi_boot_attr_ops = {
51 .show = iscsi_boot_show_attribute,
52 };
53
iscsi_boot_kobj_release(struct kobject * kobj)54 static void iscsi_boot_kobj_release(struct kobject *kobj)
55 {
56 struct iscsi_boot_kobj *boot_kobj =
57 container_of(kobj, struct iscsi_boot_kobj, kobj);
58
59 if (boot_kobj->release)
60 boot_kobj->release(boot_kobj->data);
61 kfree(boot_kobj);
62 }
63
64 static struct kobj_type iscsi_boot_ktype = {
65 .release = iscsi_boot_kobj_release,
66 .sysfs_ops = &iscsi_boot_attr_ops,
67 };
68
69 #define iscsi_boot_rd_attr(fnname, sysfs_name, attr_type) \
70 static struct iscsi_boot_attr iscsi_boot_attr_##fnname = { \
71 .attr = { .name = __stringify(sysfs_name), .mode = 0444 }, \
72 .type = attr_type, \
73 }
74
75 /* Target attrs */
76 iscsi_boot_rd_attr(tgt_index, index, ISCSI_BOOT_TGT_INDEX);
77 iscsi_boot_rd_attr(tgt_flags, flags, ISCSI_BOOT_TGT_FLAGS);
78 iscsi_boot_rd_attr(tgt_ip, ip-addr, ISCSI_BOOT_TGT_IP_ADDR);
79 iscsi_boot_rd_attr(tgt_port, port, ISCSI_BOOT_TGT_PORT);
80 iscsi_boot_rd_attr(tgt_lun, lun, ISCSI_BOOT_TGT_LUN);
81 iscsi_boot_rd_attr(tgt_chap, chap-type, ISCSI_BOOT_TGT_CHAP_TYPE);
82 iscsi_boot_rd_attr(tgt_nic, nic-assoc, ISCSI_BOOT_TGT_NIC_ASSOC);
83 iscsi_boot_rd_attr(tgt_name, target-name, ISCSI_BOOT_TGT_NAME);
84 iscsi_boot_rd_attr(tgt_chap_name, chap-name, ISCSI_BOOT_TGT_CHAP_NAME);
85 iscsi_boot_rd_attr(tgt_chap_secret, chap-secret, ISCSI_BOOT_TGT_CHAP_SECRET);
86 iscsi_boot_rd_attr(tgt_chap_rev_name, rev-chap-name,
87 ISCSI_BOOT_TGT_REV_CHAP_NAME);
88 iscsi_boot_rd_attr(tgt_chap_rev_secret, rev-chap-name-secret,
89 ISCSI_BOOT_TGT_REV_CHAP_SECRET);
90
91 static struct attribute *target_attrs[] = {
92 &iscsi_boot_attr_tgt_index.attr,
93 &iscsi_boot_attr_tgt_flags.attr,
94 &iscsi_boot_attr_tgt_ip.attr,
95 &iscsi_boot_attr_tgt_port.attr,
96 &iscsi_boot_attr_tgt_lun.attr,
97 &iscsi_boot_attr_tgt_chap.attr,
98 &iscsi_boot_attr_tgt_nic.attr,
99 &iscsi_boot_attr_tgt_name.attr,
100 &iscsi_boot_attr_tgt_chap_name.attr,
101 &iscsi_boot_attr_tgt_chap_secret.attr,
102 &iscsi_boot_attr_tgt_chap_rev_name.attr,
103 &iscsi_boot_attr_tgt_chap_rev_secret.attr,
104 NULL
105 };
106
iscsi_boot_tgt_attr_is_visible(struct kobject * kobj,struct attribute * attr,int i)107 static umode_t iscsi_boot_tgt_attr_is_visible(struct kobject *kobj,
108 struct attribute *attr, int i)
109 {
110 struct iscsi_boot_kobj *boot_kobj =
111 container_of(kobj, struct iscsi_boot_kobj, kobj);
112
113 if (attr == &iscsi_boot_attr_tgt_index.attr)
114 return boot_kobj->is_visible(boot_kobj->data,
115 ISCSI_BOOT_TGT_INDEX);
116 else if (attr == &iscsi_boot_attr_tgt_flags.attr)
117 return boot_kobj->is_visible(boot_kobj->data,
118 ISCSI_BOOT_TGT_FLAGS);
119 else if (attr == &iscsi_boot_attr_tgt_ip.attr)
120 return boot_kobj->is_visible(boot_kobj->data,
121 ISCSI_BOOT_TGT_IP_ADDR);
122 else if (attr == &iscsi_boot_attr_tgt_port.attr)
123 return boot_kobj->is_visible(boot_kobj->data,
124 ISCSI_BOOT_TGT_PORT);
125 else if (attr == &iscsi_boot_attr_tgt_lun.attr)
126 return boot_kobj->is_visible(boot_kobj->data,
127 ISCSI_BOOT_TGT_LUN);
128 else if (attr == &iscsi_boot_attr_tgt_chap.attr)
129 return boot_kobj->is_visible(boot_kobj->data,
130 ISCSI_BOOT_TGT_CHAP_TYPE);
131 else if (attr == &iscsi_boot_attr_tgt_nic.attr)
132 return boot_kobj->is_visible(boot_kobj->data,
133 ISCSI_BOOT_TGT_NIC_ASSOC);
134 else if (attr == &iscsi_boot_attr_tgt_name.attr)
135 return boot_kobj->is_visible(boot_kobj->data,
136 ISCSI_BOOT_TGT_NAME);
137 else if (attr == &iscsi_boot_attr_tgt_chap_name.attr)
138 return boot_kobj->is_visible(boot_kobj->data,
139 ISCSI_BOOT_TGT_CHAP_NAME);
140 else if (attr == &iscsi_boot_attr_tgt_chap_secret.attr)
141 return boot_kobj->is_visible(boot_kobj->data,
142 ISCSI_BOOT_TGT_CHAP_SECRET);
143 else if (attr == &iscsi_boot_attr_tgt_chap_rev_name.attr)
144 return boot_kobj->is_visible(boot_kobj->data,
145 ISCSI_BOOT_TGT_REV_CHAP_NAME);
146 else if (attr == &iscsi_boot_attr_tgt_chap_rev_secret.attr)
147 return boot_kobj->is_visible(boot_kobj->data,
148 ISCSI_BOOT_TGT_REV_CHAP_SECRET);
149 return 0;
150 }
151
152 static struct attribute_group iscsi_boot_target_attr_group = {
153 .attrs = target_attrs,
154 .is_visible = iscsi_boot_tgt_attr_is_visible,
155 };
156
157 /* Ethernet attrs */
158 iscsi_boot_rd_attr(eth_index, index, ISCSI_BOOT_ETH_INDEX);
159 iscsi_boot_rd_attr(eth_flags, flags, ISCSI_BOOT_ETH_FLAGS);
160 iscsi_boot_rd_attr(eth_ip, ip-addr, ISCSI_BOOT_ETH_IP_ADDR);
161 iscsi_boot_rd_attr(eth_prefix, prefix-len, ISCSI_BOOT_ETH_PREFIX_LEN);
162 iscsi_boot_rd_attr(eth_subnet, subnet-mask, ISCSI_BOOT_ETH_SUBNET_MASK);
163 iscsi_boot_rd_attr(eth_origin, origin, ISCSI_BOOT_ETH_ORIGIN);
164 iscsi_boot_rd_attr(eth_gateway, gateway, ISCSI_BOOT_ETH_GATEWAY);
165 iscsi_boot_rd_attr(eth_primary_dns, primary-dns, ISCSI_BOOT_ETH_PRIMARY_DNS);
166 iscsi_boot_rd_attr(eth_secondary_dns, secondary-dns,
167 ISCSI_BOOT_ETH_SECONDARY_DNS);
168 iscsi_boot_rd_attr(eth_dhcp, dhcp, ISCSI_BOOT_ETH_DHCP);
169 iscsi_boot_rd_attr(eth_vlan, vlan, ISCSI_BOOT_ETH_VLAN);
170 iscsi_boot_rd_attr(eth_mac, mac, ISCSI_BOOT_ETH_MAC);
171 iscsi_boot_rd_attr(eth_hostname, hostname, ISCSI_BOOT_ETH_HOSTNAME);
172
173 static struct attribute *ethernet_attrs[] = {
174 &iscsi_boot_attr_eth_index.attr,
175 &iscsi_boot_attr_eth_flags.attr,
176 &iscsi_boot_attr_eth_ip.attr,
177 &iscsi_boot_attr_eth_prefix.attr,
178 &iscsi_boot_attr_eth_subnet.attr,
179 &iscsi_boot_attr_eth_origin.attr,
180 &iscsi_boot_attr_eth_gateway.attr,
181 &iscsi_boot_attr_eth_primary_dns.attr,
182 &iscsi_boot_attr_eth_secondary_dns.attr,
183 &iscsi_boot_attr_eth_dhcp.attr,
184 &iscsi_boot_attr_eth_vlan.attr,
185 &iscsi_boot_attr_eth_mac.attr,
186 &iscsi_boot_attr_eth_hostname.attr,
187 NULL
188 };
189
iscsi_boot_eth_attr_is_visible(struct kobject * kobj,struct attribute * attr,int i)190 static umode_t iscsi_boot_eth_attr_is_visible(struct kobject *kobj,
191 struct attribute *attr, int i)
192 {
193 struct iscsi_boot_kobj *boot_kobj =
194 container_of(kobj, struct iscsi_boot_kobj, kobj);
195
196 if (attr == &iscsi_boot_attr_eth_index.attr)
197 return boot_kobj->is_visible(boot_kobj->data,
198 ISCSI_BOOT_ETH_INDEX);
199 else if (attr == &iscsi_boot_attr_eth_flags.attr)
200 return boot_kobj->is_visible(boot_kobj->data,
201 ISCSI_BOOT_ETH_FLAGS);
202 else if (attr == &iscsi_boot_attr_eth_ip.attr)
203 return boot_kobj->is_visible(boot_kobj->data,
204 ISCSI_BOOT_ETH_IP_ADDR);
205 else if (attr == &iscsi_boot_attr_eth_prefix.attr)
206 return boot_kobj->is_visible(boot_kobj->data,
207 ISCSI_BOOT_ETH_PREFIX_LEN);
208 else if (attr == &iscsi_boot_attr_eth_subnet.attr)
209 return boot_kobj->is_visible(boot_kobj->data,
210 ISCSI_BOOT_ETH_SUBNET_MASK);
211 else if (attr == &iscsi_boot_attr_eth_origin.attr)
212 return boot_kobj->is_visible(boot_kobj->data,
213 ISCSI_BOOT_ETH_ORIGIN);
214 else if (attr == &iscsi_boot_attr_eth_gateway.attr)
215 return boot_kobj->is_visible(boot_kobj->data,
216 ISCSI_BOOT_ETH_GATEWAY);
217 else if (attr == &iscsi_boot_attr_eth_primary_dns.attr)
218 return boot_kobj->is_visible(boot_kobj->data,
219 ISCSI_BOOT_ETH_PRIMARY_DNS);
220 else if (attr == &iscsi_boot_attr_eth_secondary_dns.attr)
221 return boot_kobj->is_visible(boot_kobj->data,
222 ISCSI_BOOT_ETH_SECONDARY_DNS);
223 else if (attr == &iscsi_boot_attr_eth_dhcp.attr)
224 return boot_kobj->is_visible(boot_kobj->data,
225 ISCSI_BOOT_ETH_DHCP);
226 else if (attr == &iscsi_boot_attr_eth_vlan.attr)
227 return boot_kobj->is_visible(boot_kobj->data,
228 ISCSI_BOOT_ETH_VLAN);
229 else if (attr == &iscsi_boot_attr_eth_mac.attr)
230 return boot_kobj->is_visible(boot_kobj->data,
231 ISCSI_BOOT_ETH_MAC);
232 else if (attr == &iscsi_boot_attr_eth_hostname.attr)
233 return boot_kobj->is_visible(boot_kobj->data,
234 ISCSI_BOOT_ETH_HOSTNAME);
235 return 0;
236 }
237
238 static struct attribute_group iscsi_boot_ethernet_attr_group = {
239 .attrs = ethernet_attrs,
240 .is_visible = iscsi_boot_eth_attr_is_visible,
241 };
242
243 /* Initiator attrs */
244 iscsi_boot_rd_attr(ini_index, index, ISCSI_BOOT_INI_INDEX);
245 iscsi_boot_rd_attr(ini_flags, flags, ISCSI_BOOT_INI_FLAGS);
246 iscsi_boot_rd_attr(ini_isns, isns-server, ISCSI_BOOT_INI_ISNS_SERVER);
247 iscsi_boot_rd_attr(ini_slp, slp-server, ISCSI_BOOT_INI_SLP_SERVER);
248 iscsi_boot_rd_attr(ini_primary_radius, pri-radius-server,
249 ISCSI_BOOT_INI_PRI_RADIUS_SERVER);
250 iscsi_boot_rd_attr(ini_secondary_radius, sec-radius-server,
251 ISCSI_BOOT_INI_SEC_RADIUS_SERVER);
252 iscsi_boot_rd_attr(ini_name, initiator-name, ISCSI_BOOT_INI_INITIATOR_NAME);
253
254 static struct attribute *initiator_attrs[] = {
255 &iscsi_boot_attr_ini_index.attr,
256 &iscsi_boot_attr_ini_flags.attr,
257 &iscsi_boot_attr_ini_isns.attr,
258 &iscsi_boot_attr_ini_slp.attr,
259 &iscsi_boot_attr_ini_primary_radius.attr,
260 &iscsi_boot_attr_ini_secondary_radius.attr,
261 &iscsi_boot_attr_ini_name.attr,
262 NULL
263 };
264
iscsi_boot_ini_attr_is_visible(struct kobject * kobj,struct attribute * attr,int i)265 static umode_t iscsi_boot_ini_attr_is_visible(struct kobject *kobj,
266 struct attribute *attr, int i)
267 {
268 struct iscsi_boot_kobj *boot_kobj =
269 container_of(kobj, struct iscsi_boot_kobj, kobj);
270
271 if (attr == &iscsi_boot_attr_ini_index.attr)
272 return boot_kobj->is_visible(boot_kobj->data,
273 ISCSI_BOOT_INI_INDEX);
274 if (attr == &iscsi_boot_attr_ini_flags.attr)
275 return boot_kobj->is_visible(boot_kobj->data,
276 ISCSI_BOOT_INI_FLAGS);
277 if (attr == &iscsi_boot_attr_ini_isns.attr)
278 return boot_kobj->is_visible(boot_kobj->data,
279 ISCSI_BOOT_INI_ISNS_SERVER);
280 if (attr == &iscsi_boot_attr_ini_slp.attr)
281 return boot_kobj->is_visible(boot_kobj->data,
282 ISCSI_BOOT_INI_SLP_SERVER);
283 if (attr == &iscsi_boot_attr_ini_primary_radius.attr)
284 return boot_kobj->is_visible(boot_kobj->data,
285 ISCSI_BOOT_INI_PRI_RADIUS_SERVER);
286 if (attr == &iscsi_boot_attr_ini_secondary_radius.attr)
287 return boot_kobj->is_visible(boot_kobj->data,
288 ISCSI_BOOT_INI_SEC_RADIUS_SERVER);
289 if (attr == &iscsi_boot_attr_ini_name.attr)
290 return boot_kobj->is_visible(boot_kobj->data,
291 ISCSI_BOOT_INI_INITIATOR_NAME);
292
293 return 0;
294 }
295
296 static struct attribute_group iscsi_boot_initiator_attr_group = {
297 .attrs = initiator_attrs,
298 .is_visible = iscsi_boot_ini_attr_is_visible,
299 };
300
301 /* iBFT ACPI Table attributes */
302 iscsi_boot_rd_attr(acpitbl_signature, signature, ISCSI_BOOT_ACPITBL_SIGNATURE);
303 iscsi_boot_rd_attr(acpitbl_oem_id, oem_id, ISCSI_BOOT_ACPITBL_OEM_ID);
304 iscsi_boot_rd_attr(acpitbl_oem_table_id, oem_table_id,
305 ISCSI_BOOT_ACPITBL_OEM_TABLE_ID);
306
307 static struct attribute *acpitbl_attrs[] = {
308 &iscsi_boot_attr_acpitbl_signature.attr,
309 &iscsi_boot_attr_acpitbl_oem_id.attr,
310 &iscsi_boot_attr_acpitbl_oem_table_id.attr,
311 NULL
312 };
313
iscsi_boot_acpitbl_attr_is_visible(struct kobject * kobj,struct attribute * attr,int i)314 static umode_t iscsi_boot_acpitbl_attr_is_visible(struct kobject *kobj,
315 struct attribute *attr, int i)
316 {
317 struct iscsi_boot_kobj *boot_kobj =
318 container_of(kobj, struct iscsi_boot_kobj, kobj);
319
320 if (attr == &iscsi_boot_attr_acpitbl_signature.attr)
321 return boot_kobj->is_visible(boot_kobj->data,
322 ISCSI_BOOT_ACPITBL_SIGNATURE);
323 if (attr == &iscsi_boot_attr_acpitbl_oem_id.attr)
324 return boot_kobj->is_visible(boot_kobj->data,
325 ISCSI_BOOT_ACPITBL_OEM_ID);
326 if (attr == &iscsi_boot_attr_acpitbl_oem_table_id.attr)
327 return boot_kobj->is_visible(boot_kobj->data,
328 ISCSI_BOOT_ACPITBL_OEM_TABLE_ID);
329 return 0;
330 }
331
332 static struct attribute_group iscsi_boot_acpitbl_attr_group = {
333 .attrs = acpitbl_attrs,
334 .is_visible = iscsi_boot_acpitbl_attr_is_visible,
335 };
336
337 static struct iscsi_boot_kobj *
iscsi_boot_create_kobj(struct iscsi_boot_kset * boot_kset,struct attribute_group * attr_group,const char * name,int index,void * data,ssize_t (* show)(void * data,int type,char * buf),umode_t (* is_visible)(void * data,int type),void (* release)(void * data))338 iscsi_boot_create_kobj(struct iscsi_boot_kset *boot_kset,
339 struct attribute_group *attr_group,
340 const char *name, int index, void *data,
341 ssize_t (*show) (void *data, int type, char *buf),
342 umode_t (*is_visible) (void *data, int type),
343 void (*release) (void *data))
344 {
345 struct iscsi_boot_kobj *boot_kobj;
346
347 boot_kobj = kzalloc(sizeof(*boot_kobj), GFP_KERNEL);
348 if (!boot_kobj)
349 return NULL;
350 INIT_LIST_HEAD(&boot_kobj->list);
351
352 boot_kobj->kobj.kset = boot_kset->kset;
353 if (kobject_init_and_add(&boot_kobj->kobj, &iscsi_boot_ktype,
354 NULL, name, index)) {
355 kfree(boot_kobj);
356 return NULL;
357 }
358 boot_kobj->data = data;
359 boot_kobj->show = show;
360 boot_kobj->is_visible = is_visible;
361 boot_kobj->release = release;
362
363 if (sysfs_create_group(&boot_kobj->kobj, attr_group)) {
364 /*
365 * We do not want to free this because the caller
366 * will assume that since the creation call failed
367 * the boot kobj was not setup and the normal release
368 * path is not being run.
369 */
370 boot_kobj->release = NULL;
371 kobject_put(&boot_kobj->kobj);
372 return NULL;
373 }
374 boot_kobj->attr_group = attr_group;
375
376 kobject_uevent(&boot_kobj->kobj, KOBJ_ADD);
377 /* Nothing broke so lets add it to the list. */
378 list_add_tail(&boot_kobj->list, &boot_kset->kobj_list);
379 return boot_kobj;
380 }
381
iscsi_boot_remove_kobj(struct iscsi_boot_kobj * boot_kobj)382 static void iscsi_boot_remove_kobj(struct iscsi_boot_kobj *boot_kobj)
383 {
384 list_del(&boot_kobj->list);
385 sysfs_remove_group(&boot_kobj->kobj, boot_kobj->attr_group);
386 kobject_put(&boot_kobj->kobj);
387 }
388
389 /**
390 * iscsi_boot_create_target() - create boot target sysfs dir
391 * @boot_kset: boot kset
392 * @index: the target id
393 * @data: driver specific data for target
394 * @show: attr show function
395 * @is_visible: attr visibility function
396 * @release: release function
397 *
398 * Note: The boot sysfs lib will free the data passed in for the caller
399 * when all refs to the target kobject have been released.
400 */
401 struct iscsi_boot_kobj *
iscsi_boot_create_target(struct iscsi_boot_kset * boot_kset,int index,void * data,ssize_t (* show)(void * data,int type,char * buf),umode_t (* is_visible)(void * data,int type),void (* release)(void * data))402 iscsi_boot_create_target(struct iscsi_boot_kset *boot_kset, int index,
403 void *data,
404 ssize_t (*show) (void *data, int type, char *buf),
405 umode_t (*is_visible) (void *data, int type),
406 void (*release) (void *data))
407 {
408 return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_target_attr_group,
409 "target%d", index, data, show, is_visible,
410 release);
411 }
412 EXPORT_SYMBOL_GPL(iscsi_boot_create_target);
413
414 /**
415 * iscsi_boot_create_initiator() - create boot initiator sysfs dir
416 * @boot_kset: boot kset
417 * @index: the initiator id
418 * @data: driver specific data
419 * @show: attr show function
420 * @is_visible: attr visibility function
421 * @release: release function
422 *
423 * Note: The boot sysfs lib will free the data passed in for the caller
424 * when all refs to the initiator kobject have been released.
425 */
426 struct iscsi_boot_kobj *
iscsi_boot_create_initiator(struct iscsi_boot_kset * boot_kset,int index,void * data,ssize_t (* show)(void * data,int type,char * buf),umode_t (* is_visible)(void * data,int type),void (* release)(void * data))427 iscsi_boot_create_initiator(struct iscsi_boot_kset *boot_kset, int index,
428 void *data,
429 ssize_t (*show) (void *data, int type, char *buf),
430 umode_t (*is_visible) (void *data, int type),
431 void (*release) (void *data))
432 {
433 return iscsi_boot_create_kobj(boot_kset,
434 &iscsi_boot_initiator_attr_group,
435 "initiator", index, data, show,
436 is_visible, release);
437 }
438 EXPORT_SYMBOL_GPL(iscsi_boot_create_initiator);
439
440 /**
441 * iscsi_boot_create_ethernet() - create boot ethernet sysfs dir
442 * @boot_kset: boot kset
443 * @index: the ethernet device id
444 * @data: driver specific data
445 * @show: attr show function
446 * @is_visible: attr visibility function
447 * @release: release function
448 *
449 * Note: The boot sysfs lib will free the data passed in for the caller
450 * when all refs to the ethernet kobject have been released.
451 */
452 struct iscsi_boot_kobj *
iscsi_boot_create_ethernet(struct iscsi_boot_kset * boot_kset,int index,void * data,ssize_t (* show)(void * data,int type,char * buf),umode_t (* is_visible)(void * data,int type),void (* release)(void * data))453 iscsi_boot_create_ethernet(struct iscsi_boot_kset *boot_kset, int index,
454 void *data,
455 ssize_t (*show) (void *data, int type, char *buf),
456 umode_t (*is_visible) (void *data, int type),
457 void (*release) (void *data))
458 {
459 return iscsi_boot_create_kobj(boot_kset,
460 &iscsi_boot_ethernet_attr_group,
461 "ethernet%d", index, data, show,
462 is_visible, release);
463 }
464 EXPORT_SYMBOL_GPL(iscsi_boot_create_ethernet);
465
466 /**
467 * iscsi_boot_create_acpitbl() - create boot acpi table sysfs dir
468 * @boot_kset: boot kset
469 * @index: not used
470 * @data: driver specific data
471 * @show: attr show function
472 * @is_visible: attr visibility function
473 * @release: release function
474 *
475 * Note: The boot sysfs lib will free the data passed in for the caller
476 * when all refs to the acpitbl kobject have been released.
477 */
478 struct iscsi_boot_kobj *
iscsi_boot_create_acpitbl(struct iscsi_boot_kset * boot_kset,int index,void * data,ssize_t (* show)(void * data,int type,char * buf),umode_t (* is_visible)(void * data,int type),void (* release)(void * data))479 iscsi_boot_create_acpitbl(struct iscsi_boot_kset *boot_kset, int index,
480 void *data,
481 ssize_t (*show)(void *data, int type, char *buf),
482 umode_t (*is_visible)(void *data, int type),
483 void (*release)(void *data))
484 {
485 return iscsi_boot_create_kobj(boot_kset,
486 &iscsi_boot_acpitbl_attr_group,
487 "acpi_header", index, data, show,
488 is_visible, release);
489 }
490 EXPORT_SYMBOL_GPL(iscsi_boot_create_acpitbl);
491
492 /**
493 * iscsi_boot_create_kset() - creates root sysfs tree
494 * @set_name: name of root dir
495 */
iscsi_boot_create_kset(const char * set_name)496 struct iscsi_boot_kset *iscsi_boot_create_kset(const char *set_name)
497 {
498 struct iscsi_boot_kset *boot_kset;
499
500 boot_kset = kzalloc(sizeof(*boot_kset), GFP_KERNEL);
501 if (!boot_kset)
502 return NULL;
503
504 boot_kset->kset = kset_create_and_add(set_name, NULL, firmware_kobj);
505 if (!boot_kset->kset) {
506 kfree(boot_kset);
507 return NULL;
508 }
509
510 INIT_LIST_HEAD(&boot_kset->kobj_list);
511 return boot_kset;
512 }
513 EXPORT_SYMBOL_GPL(iscsi_boot_create_kset);
514
515 /**
516 * iscsi_boot_create_host_kset() - creates root sysfs tree for a scsi host
517 * @hostno: host number of scsi host
518 */
iscsi_boot_create_host_kset(unsigned int hostno)519 struct iscsi_boot_kset *iscsi_boot_create_host_kset(unsigned int hostno)
520 {
521 struct iscsi_boot_kset *boot_kset;
522 char *set_name;
523
524 set_name = kasprintf(GFP_KERNEL, "iscsi_boot%u", hostno);
525 if (!set_name)
526 return NULL;
527
528 boot_kset = iscsi_boot_create_kset(set_name);
529 kfree(set_name);
530 return boot_kset;
531 }
532 EXPORT_SYMBOL_GPL(iscsi_boot_create_host_kset);
533
534 /**
535 * iscsi_boot_destroy_kset() - destroy kset and kobjects under it
536 * @boot_kset: boot kset
537 *
538 * This will remove the kset and kobjects and attrs under it.
539 */
iscsi_boot_destroy_kset(struct iscsi_boot_kset * boot_kset)540 void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset)
541 {
542 struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;
543
544 if (!boot_kset)
545 return;
546
547 list_for_each_entry_safe(boot_kobj, tmp_kobj,
548 &boot_kset->kobj_list, list)
549 iscsi_boot_remove_kobj(boot_kobj);
550
551 kset_unregister(boot_kset->kset);
552 kfree(boot_kset);
553 }
554 EXPORT_SYMBOL_GPL(iscsi_boot_destroy_kset);
555