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path: root/drivers/firmware/iscsi_boot_sysfs.c
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Diffstat (limited to 'drivers/firmware/iscsi_boot_sysfs.c')
-rw-r--r--drivers/firmware/iscsi_boot_sysfs.c481
1 files changed, 0 insertions, 481 deletions
diff --git a/drivers/firmware/iscsi_boot_sysfs.c b/drivers/firmware/iscsi_boot_sysfs.c
deleted file mode 100644
index df6bff7366cf..000000000000
--- a/drivers/firmware/iscsi_boot_sysfs.c
+++ /dev/null
@@ -1,481 +0,0 @@
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
25MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>");
26MODULE_DESCRIPTION("sysfs interface and helpers to export iSCSI boot information");
27MODULE_LICENSE("GPL");
28/*
29 * The kobject and attribute structures.
30 */
31struct 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 */
40static 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
58static const struct sysfs_ops iscsi_boot_attr_ops = {
59 .show = iscsi_boot_show_attribute,
60};
61
62static 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 kfree(boot_kobj->data);
68 kfree(boot_kobj);
69}
70
71static struct kobj_type iscsi_boot_ktype = {
72 .release = iscsi_boot_kobj_release,
73 .sysfs_ops = &iscsi_boot_attr_ops,
74};
75
76#define iscsi_boot_rd_attr(fnname, sysfs_name, attr_type) \
77static struct iscsi_boot_attr iscsi_boot_attr_##fnname = { \
78 .attr = { .name = __stringify(sysfs_name), .mode = 0444 }, \
79 .type = attr_type, \
80}
81
82/* Target attrs */
83iscsi_boot_rd_attr(tgt_index, index, ISCSI_BOOT_TGT_INDEX);
84iscsi_boot_rd_attr(tgt_flags, flags, ISCSI_BOOT_TGT_FLAGS);
85iscsi_boot_rd_attr(tgt_ip, ip-addr, ISCSI_BOOT_TGT_IP_ADDR);
86iscsi_boot_rd_attr(tgt_port, port, ISCSI_BOOT_TGT_PORT);
87iscsi_boot_rd_attr(tgt_lun, lun, ISCSI_BOOT_TGT_LUN);
88iscsi_boot_rd_attr(tgt_chap, chap-type, ISCSI_BOOT_TGT_CHAP_TYPE);
89iscsi_boot_rd_attr(tgt_nic, nic-assoc, ISCSI_BOOT_TGT_NIC_ASSOC);
90iscsi_boot_rd_attr(tgt_name, target-name, ISCSI_BOOT_TGT_NAME);
91iscsi_boot_rd_attr(tgt_chap_name, chap-name, ISCSI_BOOT_TGT_CHAP_NAME);
92iscsi_boot_rd_attr(tgt_chap_secret, chap-secret, ISCSI_BOOT_TGT_CHAP_SECRET);
93iscsi_boot_rd_attr(tgt_chap_rev_name, rev-chap-name,
94 ISCSI_BOOT_TGT_REV_CHAP_NAME);
95iscsi_boot_rd_attr(tgt_chap_rev_secret, rev-chap-name-secret,
96 ISCSI_BOOT_TGT_REV_CHAP_SECRET);
97
98static struct attribute *target_attrs[] = {
99 &iscsi_boot_attr_tgt_index.attr,
100 &iscsi_boot_attr_tgt_flags.attr,
101 &iscsi_boot_attr_tgt_ip.attr,
102 &iscsi_boot_attr_tgt_port.attr,
103 &iscsi_boot_attr_tgt_lun.attr,
104 &iscsi_boot_attr_tgt_chap.attr,
105 &iscsi_boot_attr_tgt_nic.attr,
106 &iscsi_boot_attr_tgt_name.attr,
107 &iscsi_boot_attr_tgt_chap_name.attr,
108 &iscsi_boot_attr_tgt_chap_secret.attr,
109 &iscsi_boot_attr_tgt_chap_rev_name.attr,
110 &iscsi_boot_attr_tgt_chap_rev_secret.attr,
111 NULL
112};
113
114static mode_t iscsi_boot_tgt_attr_is_visible(struct kobject *kobj,
115 struct attribute *attr, int i)
116{
117 struct iscsi_boot_kobj *boot_kobj =
118 container_of(kobj, struct iscsi_boot_kobj, kobj);
119
120 if (attr == &iscsi_boot_attr_tgt_index.attr)
121 return boot_kobj->is_visible(boot_kobj->data,
122 ISCSI_BOOT_TGT_INDEX);
123 else if (attr == &iscsi_boot_attr_tgt_flags.attr)
124 return boot_kobj->is_visible(boot_kobj->data,
125 ISCSI_BOOT_TGT_FLAGS);
126 else if (attr == &iscsi_boot_attr_tgt_ip.attr)
127 return boot_kobj->is_visible(boot_kobj->data,
128 ISCSI_BOOT_TGT_IP_ADDR);
129 else if (attr == &iscsi_boot_attr_tgt_port.attr)
130 return boot_kobj->is_visible(boot_kobj->data,
131 ISCSI_BOOT_TGT_PORT);
132 else if (attr == &iscsi_boot_attr_tgt_lun.attr)
133 return boot_kobj->is_visible(boot_kobj->data,
134 ISCSI_BOOT_TGT_LUN);
135 else if (attr == &iscsi_boot_attr_tgt_chap.attr)
136 return boot_kobj->is_visible(boot_kobj->data,
137 ISCSI_BOOT_TGT_CHAP_TYPE);
138 else if (attr == &iscsi_boot_attr_tgt_nic.attr)
139 return boot_kobj->is_visible(boot_kobj->data,
140 ISCSI_BOOT_TGT_NIC_ASSOC);
141 else if (attr == &iscsi_boot_attr_tgt_name.attr)
142 return boot_kobj->is_visible(boot_kobj->data,
143 ISCSI_BOOT_TGT_NAME);
144 else if (attr == &iscsi_boot_attr_tgt_chap_name.attr)
145 return boot_kobj->is_visible(boot_kobj->data,
146 ISCSI_BOOT_TGT_CHAP_NAME);
147 else if (attr == &iscsi_boot_attr_tgt_chap_secret.attr)
148 return boot_kobj->is_visible(boot_kobj->data,
149 ISCSI_BOOT_TGT_CHAP_SECRET);
150 else if (attr == &iscsi_boot_attr_tgt_chap_rev_name.attr)
151 return boot_kobj->is_visible(boot_kobj->data,
152 ISCSI_BOOT_TGT_REV_CHAP_NAME);
153 else if (attr == &iscsi_boot_attr_tgt_chap_rev_secret.attr)
154 return boot_kobj->is_visible(boot_kobj->data,
155 ISCSI_BOOT_TGT_REV_CHAP_SECRET);
156 return 0;
157}
158
159static struct attribute_group iscsi_boot_target_attr_group = {
160 .attrs = target_attrs,
161 .is_visible = iscsi_boot_tgt_attr_is_visible,
162};
163
164/* Ethernet attrs */
165iscsi_boot_rd_attr(eth_index, index, ISCSI_BOOT_ETH_INDEX);
166iscsi_boot_rd_attr(eth_flags, flags, ISCSI_BOOT_ETH_FLAGS);
167iscsi_boot_rd_attr(eth_ip, ip-addr, ISCSI_BOOT_ETH_IP_ADDR);
168iscsi_boot_rd_attr(eth_subnet, subnet-mask, ISCSI_BOOT_ETH_SUBNET_MASK);
169iscsi_boot_rd_attr(eth_origin, origin, ISCSI_BOOT_ETH_ORIGIN);
170iscsi_boot_rd_attr(eth_gateway, gateway, ISCSI_BOOT_ETH_GATEWAY);
171iscsi_boot_rd_attr(eth_primary_dns, primary-dns, ISCSI_BOOT_ETH_PRIMARY_DNS);
172iscsi_boot_rd_attr(eth_secondary_dns, secondary-dns,
173 ISCSI_BOOT_ETH_SECONDARY_DNS);
174iscsi_boot_rd_attr(eth_dhcp, dhcp, ISCSI_BOOT_ETH_DHCP);
175iscsi_boot_rd_attr(eth_vlan, vlan, ISCSI_BOOT_ETH_VLAN);
176iscsi_boot_rd_attr(eth_mac, mac, ISCSI_BOOT_ETH_MAC);
177iscsi_boot_rd_attr(eth_hostname, hostname, ISCSI_BOOT_ETH_HOSTNAME);
178
179static struct attribute *ethernet_attrs[] = {
180 &iscsi_boot_attr_eth_index.attr,
181 &iscsi_boot_attr_eth_flags.attr,
182 &iscsi_boot_attr_eth_ip.attr,
183 &iscsi_boot_attr_eth_subnet.attr,
184 &iscsi_boot_attr_eth_origin.attr,
185 &iscsi_boot_attr_eth_gateway.attr,
186 &iscsi_boot_attr_eth_primary_dns.attr,
187 &iscsi_boot_attr_eth_secondary_dns.attr,
188 &iscsi_boot_attr_eth_dhcp.attr,
189 &iscsi_boot_attr_eth_vlan.attr,
190 &iscsi_boot_attr_eth_mac.attr,
191 &iscsi_boot_attr_eth_hostname.attr,
192 NULL
193};
194
195static mode_t iscsi_boot_eth_attr_is_visible(struct kobject *kobj,
196 struct attribute *attr, int i)
197{
198 struct iscsi_boot_kobj *boot_kobj =
199 container_of(kobj, struct iscsi_boot_kobj, kobj);
200
201 if (attr == &iscsi_boot_attr_eth_index.attr)
202 return boot_kobj->is_visible(boot_kobj->data,
203 ISCSI_BOOT_ETH_INDEX);
204 else if (attr == &iscsi_boot_attr_eth_flags.attr)
205 return boot_kobj->is_visible(boot_kobj->data,
206 ISCSI_BOOT_ETH_FLAGS);
207 else if (attr == &iscsi_boot_attr_eth_ip.attr)
208 return boot_kobj->is_visible(boot_kobj->data,
209 ISCSI_BOOT_ETH_IP_ADDR);
210 else if (attr == &iscsi_boot_attr_eth_subnet.attr)
211 return boot_kobj->is_visible(boot_kobj->data,
212 ISCSI_BOOT_ETH_SUBNET_MASK);
213 else if (attr == &iscsi_boot_attr_eth_origin.attr)
214 return boot_kobj->is_visible(boot_kobj->data,
215 ISCSI_BOOT_ETH_ORIGIN);
216 else if (attr == &iscsi_boot_attr_eth_gateway.attr)
217 return boot_kobj->is_visible(boot_kobj->data,
218 ISCSI_BOOT_ETH_GATEWAY);
219 else if (attr == &iscsi_boot_attr_eth_primary_dns.attr)
220 return boot_kobj->is_visible(boot_kobj->data,
221 ISCSI_BOOT_ETH_PRIMARY_DNS);
222 else if (attr == &iscsi_boot_attr_eth_secondary_dns.attr)
223 return boot_kobj->is_visible(boot_kobj->data,
224 ISCSI_BOOT_ETH_SECONDARY_DNS);
225 else if (attr == &iscsi_boot_attr_eth_dhcp.attr)
226 return boot_kobj->is_visible(boot_kobj->data,
227 ISCSI_BOOT_ETH_DHCP);
228 else if (attr == &iscsi_boot_attr_eth_vlan.attr)
229 return boot_kobj->is_visible(boot_kobj->data,
230 ISCSI_BOOT_ETH_VLAN);
231 else if (attr == &iscsi_boot_attr_eth_mac.attr)
232 return boot_kobj->is_visible(boot_kobj->data,
233 ISCSI_BOOT_ETH_MAC);
234 else if (attr == &iscsi_boot_attr_eth_hostname.attr)
235 return boot_kobj->is_visible(boot_kobj->data,
236 ISCSI_BOOT_ETH_HOSTNAME);
237 return 0;
238}
239
240static struct attribute_group iscsi_boot_ethernet_attr_group = {
241 .attrs = ethernet_attrs,
242 .is_visible = iscsi_boot_eth_attr_is_visible,
243};
244
245/* Initiator attrs */
246iscsi_boot_rd_attr(ini_index, index, ISCSI_BOOT_INI_INDEX);
247iscsi_boot_rd_attr(ini_flags, flags, ISCSI_BOOT_INI_FLAGS);
248iscsi_boot_rd_attr(ini_isns, isns-server, ISCSI_BOOT_INI_ISNS_SERVER);
249iscsi_boot_rd_attr(ini_slp, slp-server, ISCSI_BOOT_INI_SLP_SERVER);
250iscsi_boot_rd_attr(ini_primary_radius, pri-radius-server,
251 ISCSI_BOOT_INI_PRI_RADIUS_SERVER);
252iscsi_boot_rd_attr(ini_secondary_radius, sec-radius-server,
253 ISCSI_BOOT_INI_SEC_RADIUS_SERVER);
254iscsi_boot_rd_attr(ini_name, initiator-name, ISCSI_BOOT_INI_INITIATOR_NAME);
255
256static struct attribute *initiator_attrs[] = {
257 &iscsi_boot_attr_ini_index.attr,
258 &iscsi_boot_attr_ini_flags.attr,
259 &iscsi_boot_attr_ini_isns.attr,
260 &iscsi_boot_attr_ini_slp.attr,
261 &iscsi_boot_attr_ini_primary_radius.attr,
262 &iscsi_boot_attr_ini_secondary_radius.attr,
263 &iscsi_boot_attr_ini_name.attr,
264 NULL
265};
266
267static mode_t iscsi_boot_ini_attr_is_visible(struct kobject *kobj,
268 struct attribute *attr, int i)
269{
270 struct iscsi_boot_kobj *boot_kobj =
271 container_of(kobj, struct iscsi_boot_kobj, kobj);
272
273 if (attr == &iscsi_boot_attr_ini_index.attr)
274 return boot_kobj->is_visible(boot_kobj->data,
275 ISCSI_BOOT_INI_INDEX);
276 if (attr == &iscsi_boot_attr_ini_flags.attr)
277 return boot_kobj->is_visible(boot_kobj->data,
278 ISCSI_BOOT_INI_FLAGS);
279 if (attr == &iscsi_boot_attr_ini_isns.attr)
280 return boot_kobj->is_visible(boot_kobj->data,
281 ISCSI_BOOT_INI_ISNS_SERVER);
282 if (attr == &iscsi_boot_attr_ini_slp.attr)
283 return boot_kobj->is_visible(boot_kobj->data,
284 ISCSI_BOOT_INI_SLP_SERVER);
285 if (attr == &iscsi_boot_attr_ini_primary_radius.attr)
286 return boot_kobj->is_visible(boot_kobj->data,
287 ISCSI_BOOT_INI_PRI_RADIUS_SERVER);
288 if (attr == &iscsi_boot_attr_ini_secondary_radius.attr)
289 return boot_kobj->is_visible(boot_kobj->data,
290 ISCSI_BOOT_INI_SEC_RADIUS_SERVER);
291 if (attr == &iscsi_boot_attr_ini_name.attr)
292 return boot_kobj->is_visible(boot_kobj->data,
293 ISCSI_BOOT_INI_INITIATOR_NAME);
294
295 return 0;
296}
297
298static struct attribute_group iscsi_boot_initiator_attr_group = {
299 .attrs = initiator_attrs,
300 .is_visible = iscsi_boot_ini_attr_is_visible,
301};
302
303static struct iscsi_boot_kobj *
304iscsi_boot_create_kobj(struct iscsi_boot_kset *boot_kset,
305 struct attribute_group *attr_group,
306 const char *name, int index, void *data,
307 ssize_t (*show) (void *data, int type, char *buf),
308 mode_t (*is_visible) (void *data, int type))
309{
310 struct iscsi_boot_kobj *boot_kobj;
311
312 boot_kobj = kzalloc(sizeof(*boot_kobj), GFP_KERNEL);
313 if (!boot_kobj)
314 return NULL;
315 INIT_LIST_HEAD(&boot_kobj->list);
316
317 boot_kobj->kobj.kset = boot_kset->kset;
318 if (kobject_init_and_add(&boot_kobj->kobj, &iscsi_boot_ktype,
319 NULL, name, index)) {
320 kfree(boot_kobj);
321 return NULL;
322 }
323 boot_kobj->data = data;
324 boot_kobj->show = show;
325 boot_kobj->is_visible = is_visible;
326
327 if (sysfs_create_group(&boot_kobj->kobj, attr_group)) {
328 /*
329 * We do not want to free this because the caller
330 * will assume that since the creation call failed
331 * the boot kobj was not setup and the normal release
332 * path is not being run.
333 */
334 boot_kobj->data = NULL;
335 kobject_put(&boot_kobj->kobj);
336 return NULL;
337 }
338 boot_kobj->attr_group = attr_group;
339
340 kobject_uevent(&boot_kobj->kobj, KOBJ_ADD);
341 /* Nothing broke so lets add it to the list. */
342 list_add_tail(&boot_kobj->list, &boot_kset->kobj_list);
343 return boot_kobj;
344}
345
346static void iscsi_boot_remove_kobj(struct iscsi_boot_kobj *boot_kobj)
347{
348 list_del(&boot_kobj->list);
349 sysfs_remove_group(&boot_kobj->kobj, boot_kobj->attr_group);
350 kobject_put(&boot_kobj->kobj);
351}
352
353/**
354 * iscsi_boot_create_target() - create boot target sysfs dir
355 * @boot_kset: boot kset
356 * @index: the target id
357 * @data: driver specific data for target
358 * @show: attr show function
359 * @is_visible: attr visibility function
360 *
361 * Note: The boot sysfs lib will free the data passed in for the caller
362 * when all refs to the target kobject have been released.
363 */
364struct iscsi_boot_kobj *
365iscsi_boot_create_target(struct iscsi_boot_kset *boot_kset, int index,
366 void *data,
367 ssize_t (*show) (void *data, int type, char *buf),
368 mode_t (*is_visible) (void *data, int type))
369{
370 return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_target_attr_group,
371 "target%d", index, data, show, is_visible);
372}
373EXPORT_SYMBOL_GPL(iscsi_boot_create_target);
374
375/**
376 * iscsi_boot_create_initiator() - create boot initiator sysfs dir
377 * @boot_kset: boot kset
378 * @index: the initiator id
379 * @data: driver specific data
380 * @show: attr show function
381 * @is_visible: attr visibility function
382 *
383 * Note: The boot sysfs lib will free the data passed in for the caller
384 * when all refs to the initiator kobject have been released.
385 */
386struct iscsi_boot_kobj *
387iscsi_boot_create_initiator(struct iscsi_boot_kset *boot_kset, int index,
388 void *data,
389 ssize_t (*show) (void *data, int type, char *buf),
390 mode_t (*is_visible) (void *data, int type))
391{
392 return iscsi_boot_create_kobj(boot_kset,
393 &iscsi_boot_initiator_attr_group,
394 "initiator", index, data, show,
395 is_visible);
396}
397EXPORT_SYMBOL_GPL(iscsi_boot_create_initiator);
398
399/**
400 * iscsi_boot_create_ethernet() - create boot ethernet sysfs dir
401 * @boot_kset: boot kset
402 * @index: the ethernet device id
403 * @data: driver specific data
404 * @show: attr show function
405 * @is_visible: attr visibility function
406 *
407 * Note: The boot sysfs lib will free the data passed in for the caller
408 * when all refs to the ethernet kobject have been released.
409 */
410struct iscsi_boot_kobj *
411iscsi_boot_create_ethernet(struct iscsi_boot_kset *boot_kset, int index,
412 void *data,
413 ssize_t (*show) (void *data, int type, char *buf),
414 mode_t (*is_visible) (void *data, int type))
415{
416 return iscsi_boot_create_kobj(boot_kset,
417 &iscsi_boot_ethernet_attr_group,
418 "ethernet%d", index, data, show,
419 is_visible);
420}
421EXPORT_SYMBOL_GPL(iscsi_boot_create_ethernet);
422
423/**
424 * iscsi_boot_create_kset() - creates root sysfs tree
425 * @set_name: name of root dir
426 */
427struct iscsi_boot_kset *iscsi_boot_create_kset(const char *set_name)
428{
429 struct iscsi_boot_kset *boot_kset;
430
431 boot_kset = kzalloc(sizeof(*boot_kset), GFP_KERNEL);
432 if (!boot_kset)
433 return NULL;
434
435 boot_kset->kset = kset_create_and_add(set_name, NULL, firmware_kobj);
436 if (!boot_kset->kset) {
437 kfree(boot_kset);
438 return NULL;
439 }
440
441 INIT_LIST_HEAD(&boot_kset->kobj_list);
442 return boot_kset;
443}
444EXPORT_SYMBOL_GPL(iscsi_boot_create_kset);
445
446/**
447 * iscsi_boot_create_host_kset() - creates root sysfs tree for a scsi host
448 * @hostno: host number of scsi host
449 */
450struct iscsi_boot_kset *iscsi_boot_create_host_kset(unsigned int hostno)
451{
452 struct iscsi_boot_kset *boot_kset;
453 char *set_name;
454
455 set_name = kasprintf(GFP_KERNEL, "iscsi_boot%u", hostno);
456 if (!set_name)
457 return NULL;
458
459 boot_kset = iscsi_boot_create_kset(set_name);
460 kfree(set_name);
461 return boot_kset;
462}
463EXPORT_SYMBOL_GPL(iscsi_boot_create_host_kset);
464
465/**
466 * iscsi_boot_destroy_kset() - destroy kset and kobjects under it
467 * @boot_kset: boot kset
468 *
469 * This will remove the kset and kobjects and attrs under it.
470 */
471void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset)
472{
473 struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;
474
475 list_for_each_entry_safe(boot_kobj, tmp_kobj,
476 &boot_kset->kobj_list, list)
477 iscsi_boot_remove_kobj(boot_kobj);
478
479 kset_unregister(boot_kset->kset);
480}
481EXPORT_SYMBOL_GPL(iscsi_boot_destroy_kset);
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