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138fe4e0 KR |
1 | /* |
2 | * Copyright 2007 Red Hat, Inc. | |
3 | * by Peter Jones <pjones@redhat.com> | |
4 | * Copyright 2008 IBM, Inc. | |
5 | * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
6 | * Copyright 2008 | |
7 | * by Konrad Rzeszutek <ketuzsezr@darnok.org> | |
8 | * | |
9 | * This code exposes the iSCSI Boot Format Table to userland via sysfs. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License v2.0 as published by | |
13 | * the Free Software Foundation | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * Changelog: | |
21 | * | |
22 | * 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org> | |
23 | * Updated comments and copyrights. (v0.4.9) | |
24 | * | |
25 | * 11 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
26 | * Converted to using ibft_addr. (v0.4.8) | |
27 | * | |
28 | * 8 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
29 | * Combined two functions in one: reserve_ibft_region. (v0.4.7) | |
30 | * | |
31 | * 30 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
32 | * Added logic to handle IPv6 addresses. (v0.4.6) | |
33 | * | |
34 | * 25 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
35 | * Added logic to handle badly not-to-spec iBFT. (v0.4.5) | |
36 | * | |
37 | * 4 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
38 | * Added __init to function declarations. (v0.4.4) | |
39 | * | |
40 | * 21 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
41 | * Updated kobject registration, combined unregister functions in one | |
42 | * and code and style cleanup. (v0.4.3) | |
43 | * | |
44 | * 5 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
45 | * Added end-markers to enums and re-organized kobject registration. (v0.4.2) | |
46 | * | |
47 | * 4 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
48 | * Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1) | |
49 | * | |
50 | * 28 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
51 | * Added sysfs-ibft documentation, moved 'find_ibft' function to | |
52 | * in its own file and added text attributes for every struct field. (v0.4) | |
53 | * | |
54 | * 21 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
55 | * Added text attributes emulating OpenFirmware /proc/device-tree naming. | |
56 | * Removed binary /sysfs interface (v0.3) | |
57 | * | |
58 | * 29 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
59 | * Added functionality in setup.c to reserve iBFT region. (v0.2) | |
60 | * | |
61 | * 27 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> | |
62 | * First version exposing iBFT data via a binary /sysfs. (v0.1) | |
63 | * | |
64 | */ | |
65 | ||
66 | ||
67 | #include <linux/blkdev.h> | |
68 | #include <linux/capability.h> | |
69 | #include <linux/ctype.h> | |
70 | #include <linux/device.h> | |
71 | #include <linux/err.h> | |
72 | #include <linux/init.h> | |
73 | #include <linux/iscsi_ibft.h> | |
74 | #include <linux/limits.h> | |
75 | #include <linux/module.h> | |
76 | #include <linux/pci.h> | |
77 | #include <linux/slab.h> | |
78 | #include <linux/stat.h> | |
79 | #include <linux/string.h> | |
80 | #include <linux/types.h> | |
81 | ||
82 | #define IBFT_ISCSI_VERSION "0.4.9" | |
83 | #define IBFT_ISCSI_DATE "2008-Mar-14" | |
84 | ||
85 | MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \ | |
86 | Konrad Rzeszutek <ketuzsezr@darnok.org>"); | |
87 | MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information"); | |
88 | MODULE_LICENSE("GPL"); | |
89 | MODULE_VERSION(IBFT_ISCSI_VERSION); | |
90 | ||
91 | struct ibft_hdr { | |
92 | u8 id; | |
93 | u8 version; | |
94 | u16 length; | |
95 | u8 index; | |
96 | u8 flags; | |
97 | } __attribute__((__packed__)); | |
98 | ||
99 | struct ibft_control { | |
100 | struct ibft_hdr hdr; | |
101 | u16 extensions; | |
102 | u16 initiator_off; | |
103 | u16 nic0_off; | |
104 | u16 tgt0_off; | |
105 | u16 nic1_off; | |
106 | u16 tgt1_off; | |
107 | } __attribute__((__packed__)); | |
108 | ||
109 | struct ibft_initiator { | |
110 | struct ibft_hdr hdr; | |
111 | char isns_server[16]; | |
112 | char slp_server[16]; | |
113 | char pri_radius_server[16]; | |
114 | char sec_radius_server[16]; | |
115 | u16 initiator_name_len; | |
116 | u16 initiator_name_off; | |
117 | } __attribute__((__packed__)); | |
118 | ||
119 | struct ibft_nic { | |
120 | struct ibft_hdr hdr; | |
121 | char ip_addr[16]; | |
122 | u8 subnet_mask_prefix; | |
123 | u8 origin; | |
124 | char gateway[16]; | |
125 | char primary_dns[16]; | |
126 | char secondary_dns[16]; | |
127 | char dhcp[16]; | |
128 | u16 vlan; | |
129 | char mac[6]; | |
130 | u16 pci_bdf; | |
131 | u16 hostname_len; | |
132 | u16 hostname_off; | |
133 | } __attribute__((__packed__)); | |
134 | ||
135 | struct ibft_tgt { | |
136 | struct ibft_hdr hdr; | |
137 | char ip_addr[16]; | |
138 | u16 port; | |
139 | char lun[8]; | |
140 | u8 chap_type; | |
141 | u8 nic_assoc; | |
142 | u16 tgt_name_len; | |
143 | u16 tgt_name_off; | |
144 | u16 chap_name_len; | |
145 | u16 chap_name_off; | |
146 | u16 chap_secret_len; | |
147 | u16 chap_secret_off; | |
148 | u16 rev_chap_name_len; | |
149 | u16 rev_chap_name_off; | |
150 | u16 rev_chap_secret_len; | |
151 | u16 rev_chap_secret_off; | |
152 | } __attribute__((__packed__)); | |
153 | ||
154 | /* | |
155 | * The kobject different types and its names. | |
156 | * | |
157 | */ | |
158 | enum ibft_id { | |
159 | id_reserved = 0, /* We don't support. */ | |
160 | id_control = 1, /* Should show up only once and is not exported. */ | |
161 | id_initiator = 2, | |
162 | id_nic = 3, | |
163 | id_target = 4, | |
164 | id_extensions = 5, /* We don't support. */ | |
165 | id_end_marker, | |
166 | }; | |
167 | ||
168 | /* | |
169 | * We do not support the other types, hence the usage of NULL. | |
170 | * This maps to the enum ibft_id. | |
171 | */ | |
172 | static const char *ibft_id_names[] = | |
173 | {NULL, NULL, "initiator", "ethernet%d", "target%d", NULL, NULL}; | |
174 | ||
175 | /* | |
176 | * The text attributes names for each of the kobjects. | |
177 | */ | |
178 | enum ibft_eth_properties_enum { | |
179 | ibft_eth_index, | |
180 | ibft_eth_flags, | |
181 | ibft_eth_ip_addr, | |
182 | ibft_eth_subnet_mask, | |
183 | ibft_eth_origin, | |
184 | ibft_eth_gateway, | |
185 | ibft_eth_primary_dns, | |
186 | ibft_eth_secondary_dns, | |
187 | ibft_eth_dhcp, | |
188 | ibft_eth_vlan, | |
189 | ibft_eth_mac, | |
190 | /* ibft_eth_pci_bdf - this is replaced by link to the device itself. */ | |
191 | ibft_eth_hostname, | |
192 | ibft_eth_end_marker, | |
193 | }; | |
194 | ||
195 | static const char *ibft_eth_properties[] = | |
196 | {"index", "flags", "ip-addr", "subnet-mask", "origin", "gateway", | |
197 | "primary-dns", "secondary-dns", "dhcp", "vlan", "mac", "hostname", | |
198 | NULL}; | |
199 | ||
200 | enum ibft_tgt_properties_enum { | |
201 | ibft_tgt_index, | |
202 | ibft_tgt_flags, | |
203 | ibft_tgt_ip_addr, | |
204 | ibft_tgt_port, | |
205 | ibft_tgt_lun, | |
206 | ibft_tgt_chap_type, | |
207 | ibft_tgt_nic_assoc, | |
208 | ibft_tgt_name, | |
209 | ibft_tgt_chap_name, | |
210 | ibft_tgt_chap_secret, | |
211 | ibft_tgt_rev_chap_name, | |
212 | ibft_tgt_rev_chap_secret, | |
213 | ibft_tgt_end_marker, | |
214 | }; | |
215 | ||
216 | static const char *ibft_tgt_properties[] = | |
217 | {"index", "flags", "ip-addr", "port", "lun", "chap-type", "nic-assoc", | |
218 | "target-name", "chap-name", "chap-secret", "rev-chap-name", | |
219 | "rev-chap-name-secret", NULL}; | |
220 | ||
221 | enum ibft_initiator_properties_enum { | |
222 | ibft_init_index, | |
223 | ibft_init_flags, | |
224 | ibft_init_isns_server, | |
225 | ibft_init_slp_server, | |
226 | ibft_init_pri_radius_server, | |
227 | ibft_init_sec_radius_server, | |
228 | ibft_init_initiator_name, | |
229 | ibft_init_end_marker, | |
230 | }; | |
231 | ||
232 | static const char *ibft_initiator_properties[] = | |
233 | {"index", "flags", "isns-server", "slp-server", "pri-radius-server", | |
234 | "sec-radius-server", "initiator-name", NULL}; | |
235 | ||
236 | /* | |
237 | * The kobject and attribute structures. | |
238 | */ | |
239 | ||
240 | struct ibft_kobject { | |
241 | struct ibft_table_header *header; | |
242 | union { | |
243 | struct ibft_initiator *initiator; | |
244 | struct ibft_nic *nic; | |
245 | struct ibft_tgt *tgt; | |
246 | struct ibft_hdr *hdr; | |
247 | }; | |
248 | struct kobject kobj; | |
249 | struct list_head node; | |
250 | }; | |
251 | ||
252 | struct ibft_attribute { | |
253 | struct attribute attr; | |
254 | ssize_t (*show) (struct ibft_kobject *entry, | |
255 | struct ibft_attribute *attr, char *buf); | |
256 | union { | |
257 | struct ibft_initiator *initiator; | |
258 | struct ibft_nic *nic; | |
259 | struct ibft_tgt *tgt; | |
260 | struct ibft_hdr *hdr; | |
261 | }; | |
262 | struct kobject *kobj; | |
263 | int type; /* The enum of the type. This can be any value of: | |
264 | ibft_eth_properties_enum, ibft_tgt_properties_enum, | |
265 | or ibft_initiator_properties_enum. */ | |
266 | struct list_head node; | |
267 | }; | |
268 | ||
269 | static LIST_HEAD(ibft_attr_list); | |
270 | static LIST_HEAD(ibft_kobject_list); | |
271 | ||
272 | static const char nulls[16]; | |
273 | ||
274 | /* | |
275 | * Helper functions to parse data properly. | |
276 | */ | |
277 | static ssize_t sprintf_ipaddr(char *buf, u8 *ip) | |
278 | { | |
279 | char *str = buf; | |
280 | ||
281 | if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 && | |
282 | ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 && | |
283 | ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) { | |
284 | /* | |
285 | * IPV4 | |
286 | */ | |
287 | str += sprintf(buf, NIPQUAD_FMT, ip[12], | |
288 | ip[13], ip[14], ip[15]); | |
289 | } else { | |
290 | /* | |
291 | * IPv6 | |
292 | */ | |
293 | str += sprintf(str, NIP6_FMT, ntohs(ip[0]), ntohs(ip[1]), | |
294 | ntohs(ip[2]), ntohs(ip[3]), ntohs(ip[4]), | |
295 | ntohs(ip[5]), ntohs(ip[6]), ntohs(ip[7])); | |
296 | } | |
297 | str += sprintf(str, "\n"); | |
298 | return str - buf; | |
299 | } | |
300 | ||
301 | static ssize_t sprintf_string(char *str, int len, char *buf) | |
302 | { | |
303 | return sprintf(str, "%.*s\n", len, buf); | |
304 | } | |
305 | ||
306 | /* | |
307 | * Helper function to verify the IBFT header. | |
308 | */ | |
309 | static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length) | |
310 | { | |
311 | if (hdr->id != id) { | |
312 | printk(KERN_ERR "iBFT error: We expected the " \ | |
313 | "field header.id to have %d but " \ | |
314 | "found %d instead!\n", id, hdr->id); | |
315 | return -ENODEV; | |
316 | } | |
317 | if (hdr->length != length) { | |
318 | printk(KERN_ERR "iBFT error: We expected the " \ | |
319 | "field header.length to have %d but " \ | |
320 | "found %d instead!\n", length, hdr->length); | |
321 | return -ENODEV; | |
322 | } | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | static void ibft_release(struct kobject *kobj) | |
328 | { | |
329 | struct ibft_kobject *ibft = | |
330 | container_of(kobj, struct ibft_kobject, kobj); | |
331 | kfree(ibft); | |
332 | } | |
333 | ||
334 | /* | |
335 | * Routines for parsing the iBFT data to be human readable. | |
336 | */ | |
337 | ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry, | |
338 | struct ibft_attribute *attr, | |
339 | char *buf) | |
340 | { | |
341 | struct ibft_initiator *initiator = entry->initiator; | |
342 | void *ibft_loc = entry->header; | |
343 | char *str = buf; | |
344 | ||
345 | if (!initiator) | |
346 | return 0; | |
347 | ||
348 | switch (attr->type) { | |
349 | case ibft_init_index: | |
350 | str += sprintf(str, "%d\n", initiator->hdr.index); | |
351 | break; | |
352 | case ibft_init_flags: | |
353 | str += sprintf(str, "%d\n", initiator->hdr.flags); | |
354 | break; | |
355 | case ibft_init_isns_server: | |
356 | str += sprintf_ipaddr(str, initiator->isns_server); | |
357 | break; | |
358 | case ibft_init_slp_server: | |
359 | str += sprintf_ipaddr(str, initiator->slp_server); | |
360 | break; | |
361 | case ibft_init_pri_radius_server: | |
362 | str += sprintf_ipaddr(str, initiator->pri_radius_server); | |
363 | break; | |
364 | case ibft_init_sec_radius_server: | |
365 | str += sprintf_ipaddr(str, initiator->sec_radius_server); | |
366 | break; | |
367 | case ibft_init_initiator_name: | |
368 | str += sprintf_string(str, initiator->initiator_name_len, | |
369 | (char *)ibft_loc + | |
370 | initiator->initiator_name_off); | |
371 | break; | |
372 | default: | |
373 | break; | |
374 | } | |
375 | ||
376 | return str - buf; | |
377 | } | |
378 | ||
379 | ssize_t ibft_attr_show_nic(struct ibft_kobject *entry, | |
380 | struct ibft_attribute *attr, | |
381 | char *buf) | |
382 | { | |
383 | struct ibft_nic *nic = entry->nic; | |
384 | void *ibft_loc = entry->header; | |
385 | char *str = buf; | |
386 | char *mac; | |
387 | int val; | |
388 | ||
389 | if (!nic) | |
390 | return 0; | |
391 | ||
392 | switch (attr->type) { | |
393 | case ibft_eth_index: | |
394 | str += sprintf(str, "%d\n", nic->hdr.index); | |
395 | break; | |
396 | case ibft_eth_flags: | |
397 | str += sprintf(str, "%d\n", nic->hdr.flags); | |
398 | break; | |
399 | case ibft_eth_ip_addr: | |
400 | str += sprintf_ipaddr(str, nic->ip_addr); | |
401 | break; | |
402 | case ibft_eth_subnet_mask: | |
403 | val = ~((1 << (32-nic->subnet_mask_prefix))-1); | |
404 | str += sprintf(str, NIPQUAD_FMT, | |
405 | (u8)(val >> 24), (u8)(val >> 16), | |
406 | (u8)(val >> 8), (u8)(val)); | |
407 | break; | |
408 | case ibft_eth_origin: | |
409 | str += sprintf(str, "%d\n", nic->origin); | |
410 | break; | |
411 | case ibft_eth_gateway: | |
412 | str += sprintf_ipaddr(str, nic->gateway); | |
413 | break; | |
414 | case ibft_eth_primary_dns: | |
415 | str += sprintf_ipaddr(str, nic->primary_dns); | |
416 | break; | |
417 | case ibft_eth_secondary_dns: | |
418 | str += sprintf_ipaddr(str, nic->secondary_dns); | |
419 | break; | |
420 | case ibft_eth_dhcp: | |
421 | str += sprintf_ipaddr(str, nic->dhcp); | |
422 | break; | |
423 | case ibft_eth_vlan: | |
424 | str += sprintf(str, "%d\n", nic->vlan); | |
425 | break; | |
426 | case ibft_eth_mac: | |
427 | mac = nic->mac; | |
428 | str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n", | |
429 | (u8)mac[0], (u8)mac[1], (u8)mac[2], | |
430 | (u8)mac[3], (u8)mac[4], (u8)mac[5]); | |
431 | break; | |
432 | case ibft_eth_hostname: | |
433 | str += sprintf_string(str, nic->hostname_len, | |
434 | (char *)ibft_loc + nic->hostname_off); | |
435 | break; | |
436 | default: | |
437 | break; | |
438 | } | |
439 | ||
440 | return str - buf; | |
441 | }; | |
442 | ||
443 | ssize_t ibft_attr_show_target(struct ibft_kobject *entry, | |
444 | struct ibft_attribute *attr, | |
445 | char *buf) | |
446 | { | |
447 | struct ibft_tgt *tgt = entry->tgt; | |
448 | void *ibft_loc = entry->header; | |
449 | char *str = buf; | |
450 | int i; | |
451 | ||
452 | if (!tgt) | |
453 | return 0; | |
454 | ||
455 | switch (attr->type) { | |
456 | case ibft_tgt_index: | |
457 | str += sprintf(str, "%d\n", tgt->hdr.index); | |
458 | break; | |
459 | case ibft_tgt_flags: | |
460 | str += sprintf(str, "%d\n", tgt->hdr.flags); | |
461 | break; | |
462 | case ibft_tgt_ip_addr: | |
463 | str += sprintf_ipaddr(str, tgt->ip_addr); | |
464 | break; | |
465 | case ibft_tgt_port: | |
466 | str += sprintf(str, "%d\n", tgt->port); | |
467 | break; | |
468 | case ibft_tgt_lun: | |
469 | for (i = 0; i < 8; i++) | |
470 | str += sprintf(str, "%x", (u8)tgt->lun[i]); | |
471 | str += sprintf(str, "\n"); | |
472 | break; | |
473 | case ibft_tgt_nic_assoc: | |
474 | str += sprintf(str, "%d\n", tgt->nic_assoc); | |
475 | break; | |
476 | case ibft_tgt_chap_type: | |
477 | str += sprintf(str, "%d\n", tgt->chap_type); | |
478 | break; | |
479 | case ibft_tgt_name: | |
480 | str += sprintf_string(str, tgt->tgt_name_len, | |
481 | (char *)ibft_loc + tgt->tgt_name_off); | |
482 | break; | |
483 | case ibft_tgt_chap_name: | |
484 | str += sprintf_string(str, tgt->chap_name_len, | |
485 | (char *)ibft_loc + tgt->chap_name_off); | |
486 | break; | |
487 | case ibft_tgt_chap_secret: | |
488 | str += sprintf_string(str, tgt->chap_secret_len, | |
489 | (char *)ibft_loc + tgt->chap_secret_off); | |
490 | break; | |
491 | case ibft_tgt_rev_chap_name: | |
492 | str += sprintf_string(str, tgt->rev_chap_name_len, | |
493 | (char *)ibft_loc + | |
494 | tgt->rev_chap_name_off); | |
495 | break; | |
496 | case ibft_tgt_rev_chap_secret: | |
497 | str += sprintf_string(str, tgt->rev_chap_secret_len, | |
498 | (char *)ibft_loc + | |
499 | tgt->rev_chap_secret_off); | |
500 | break; | |
501 | default: | |
502 | break; | |
503 | } | |
504 | ||
505 | return str - buf; | |
506 | } | |
507 | ||
508 | /* | |
509 | * The routine called for all sysfs attributes. | |
510 | */ | |
511 | static ssize_t ibft_show_attribute(struct kobject *kobj, | |
512 | struct attribute *attr, | |
513 | char *buf) | |
514 | { | |
515 | struct ibft_kobject *dev = | |
516 | container_of(kobj, struct ibft_kobject, kobj); | |
517 | struct ibft_attribute *ibft_attr = | |
518 | container_of(attr, struct ibft_attribute, attr); | |
519 | ssize_t ret = -EIO; | |
520 | char *str = buf; | |
521 | ||
522 | if (!capable(CAP_SYS_ADMIN)) | |
523 | return -EACCES; | |
524 | ||
525 | if (ibft_attr->show) | |
526 | ret = ibft_attr->show(dev, ibft_attr, str); | |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | static struct sysfs_ops ibft_attr_ops = { | |
532 | .show = ibft_show_attribute, | |
533 | }; | |
534 | ||
535 | static struct kobj_type ibft_ktype = { | |
536 | .release = ibft_release, | |
537 | .sysfs_ops = &ibft_attr_ops, | |
538 | }; | |
539 | ||
540 | static struct kset *ibft_kset; | |
541 | ||
542 | static int __init ibft_check_device(void) | |
543 | { | |
544 | int len; | |
545 | u8 *pos; | |
546 | u8 csum = 0; | |
547 | ||
548 | len = ibft_addr->length; | |
549 | ||
550 | /* Sanity checking of iBFT. */ | |
551 | if (ibft_addr->revision != 1) { | |
552 | printk(KERN_ERR "iBFT module supports only revision 1, " \ | |
553 | "while this is %d.\n", ibft_addr->revision); | |
554 | return -ENOENT; | |
555 | } | |
556 | for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++) | |
557 | csum += *pos; | |
558 | ||
559 | if (csum) { | |
560 | printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum); | |
561 | return -ENOENT; | |
562 | } | |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | /* | |
568 | * Helper function for ibft_register_kobjects. | |
569 | */ | |
570 | static int __init ibft_create_kobject(struct ibft_table_header *header, | |
571 | struct ibft_hdr *hdr, | |
572 | struct list_head *list) | |
573 | { | |
574 | struct ibft_kobject *ibft_kobj = NULL; | |
575 | struct ibft_nic *nic = (struct ibft_nic *)hdr; | |
576 | struct pci_dev *pci_dev; | |
577 | int rc = 0; | |
578 | ||
579 | ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL); | |
580 | if (!ibft_kobj) | |
581 | return -ENOMEM; | |
582 | ||
583 | ibft_kobj->header = header; | |
584 | ibft_kobj->hdr = hdr; | |
585 | ||
586 | switch (hdr->id) { | |
587 | case id_initiator: | |
588 | rc = ibft_verify_hdr("initiator", hdr, id_initiator, | |
589 | sizeof(*ibft_kobj->initiator)); | |
590 | break; | |
591 | case id_nic: | |
592 | rc = ibft_verify_hdr("ethernet", hdr, id_nic, | |
593 | sizeof(*ibft_kobj->nic)); | |
594 | break; | |
595 | case id_target: | |
596 | rc = ibft_verify_hdr("target", hdr, id_target, | |
597 | sizeof(*ibft_kobj->tgt)); | |
598 | break; | |
599 | case id_reserved: | |
600 | case id_control: | |
601 | case id_extensions: | |
602 | /* Fields which we don't support. Ignore them */ | |
603 | rc = 1; | |
604 | break; | |
605 | default: | |
606 | printk(KERN_ERR "iBFT has unknown structure type (%d). " \ | |
607 | "Report this bug to %.6s!\n", hdr->id, | |
608 | header->oem_id); | |
609 | rc = 1; | |
610 | break; | |
611 | } | |
612 | ||
613 | if (rc) { | |
614 | /* Skip adding this kobject, but exit with non-fatal error. */ | |
615 | kfree(ibft_kobj); | |
616 | goto out_invalid_struct; | |
617 | } | |
618 | ||
619 | ibft_kobj->kobj.kset = ibft_kset; | |
620 | ||
621 | rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype, | |
622 | NULL, ibft_id_names[hdr->id], hdr->index); | |
623 | ||
624 | if (rc) { | |
625 | kfree(ibft_kobj); | |
626 | goto out; | |
627 | } | |
628 | ||
629 | kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD); | |
630 | ||
631 | if (hdr->id == id_nic) { | |
632 | /* | |
633 | * We don't search for the device in other domains than | |
634 | * zero. This is because on x86 platforms the BIOS | |
635 | * executes only devices which are in domain 0. Furthermore, the | |
636 | * iBFT spec doesn't have a domain id field :-( | |
637 | */ | |
638 | pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8, | |
639 | (nic->pci_bdf & 0xff)); | |
640 | if (pci_dev) { | |
641 | rc = sysfs_create_link(&ibft_kobj->kobj, | |
642 | &pci_dev->dev.kobj, "device"); | |
643 | pci_dev_put(pci_dev); | |
644 | } | |
645 | } | |
646 | ||
647 | /* Nothing broke so lets add it to the list. */ | |
648 | list_add_tail(&ibft_kobj->node, list); | |
649 | out: | |
650 | return rc; | |
651 | out_invalid_struct: | |
652 | /* Unsupported structs are skipped. */ | |
653 | return 0; | |
654 | } | |
655 | ||
656 | /* | |
657 | * Scan the IBFT table structure for the NIC and Target fields. When | |
658 | * found add them on the passed-in list. We do not support the other | |
659 | * fields at this point, so they are skipped. | |
660 | */ | |
661 | static int __init ibft_register_kobjects(struct ibft_table_header *header, | |
662 | struct list_head *list) | |
663 | { | |
664 | struct ibft_control *control = NULL; | |
665 | void *ptr, *end; | |
666 | int rc = 0; | |
667 | u16 offset; | |
668 | u16 eot_offset; | |
669 | ||
670 | control = (void *)header + sizeof(*header); | |
671 | end = (void *)control + control->hdr.length; | |
672 | eot_offset = (void *)header + header->length - | |
673 | (void *)control - sizeof(*header); | |
674 | rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control, | |
675 | sizeof(*control)); | |
676 | ||
677 | /* iBFT table safety checking */ | |
678 | rc |= ((control->hdr.index) ? -ENODEV : 0); | |
679 | if (rc) { | |
680 | printk(KERN_ERR "iBFT error: Control header is invalid!\n"); | |
681 | return rc; | |
682 | } | |
683 | for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) { | |
684 | offset = *(u16 *)ptr; | |
685 | if (offset && offset < header->length && offset < eot_offset) { | |
686 | rc = ibft_create_kobject(header, | |
687 | (void *)header + offset, | |
688 | list); | |
689 | if (rc) | |
690 | break; | |
691 | } | |
692 | } | |
693 | ||
694 | return rc; | |
695 | } | |
696 | ||
697 | static void ibft_unregister(struct list_head *attr_list, | |
698 | struct list_head *kobj_list) | |
699 | { | |
700 | struct ibft_kobject *data = NULL, *n; | |
701 | struct ibft_attribute *attr = NULL, *m; | |
702 | ||
703 | list_for_each_entry_safe(attr, m, attr_list, node) { | |
704 | sysfs_remove_file(attr->kobj, &attr->attr); | |
705 | list_del(&attr->node); | |
706 | kfree(attr); | |
707 | }; | |
708 | list_del_init(attr_list); | |
709 | ||
710 | list_for_each_entry_safe(data, n, kobj_list, node) { | |
711 | list_del(&data->node); | |
712 | if (data->hdr->id == id_nic) | |
713 | sysfs_remove_link(&data->kobj, "device"); | |
714 | kobject_put(&data->kobj); | |
715 | }; | |
716 | list_del_init(kobj_list); | |
717 | } | |
718 | ||
719 | static int __init ibft_create_attribute(struct ibft_kobject *kobj_data, | |
720 | int type, | |
721 | const char *name, | |
722 | ssize_t (*show)(struct ibft_kobject *, | |
723 | struct ibft_attribute*, | |
724 | char *buf), | |
725 | struct list_head *list) | |
726 | { | |
727 | struct ibft_attribute *attr = NULL; | |
728 | struct ibft_hdr *hdr = kobj_data->hdr; | |
729 | ||
730 | attr = kmalloc(sizeof(*attr), GFP_KERNEL); | |
731 | if (!attr) | |
732 | return -ENOMEM; | |
733 | ||
734 | attr->attr.name = name; | |
735 | attr->attr.mode = S_IRUSR; | |
736 | attr->attr.owner = THIS_MODULE; | |
737 | ||
738 | attr->hdr = hdr; | |
739 | attr->show = show; | |
740 | attr->kobj = &kobj_data->kobj; | |
741 | attr->type = type; | |
742 | ||
743 | list_add_tail(&attr->node, list); | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
748 | /* | |
749 | * Helper routiners to check to determine if the entry is valid | |
750 | * in the proper iBFT structure. | |
751 | */ | |
752 | static int __init ibft_check_nic_for(struct ibft_nic *nic, int entry) | |
753 | { | |
754 | int rc = 0; | |
755 | ||
756 | switch (entry) { | |
757 | case ibft_eth_index: | |
758 | case ibft_eth_flags: | |
759 | rc = 1; | |
760 | break; | |
761 | case ibft_eth_ip_addr: | |
762 | if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) | |
763 | rc = 1; | |
764 | break; | |
765 | case ibft_eth_subnet_mask: | |
766 | if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) | |
767 | rc = 1; | |
768 | break; | |
769 | case ibft_eth_origin: | |
770 | rc = 1; | |
771 | break; | |
772 | case ibft_eth_gateway: | |
773 | if (memcmp(nic->gateway, nulls, sizeof(nic->gateway))) | |
774 | rc = 1; | |
775 | break; | |
776 | case ibft_eth_primary_dns: | |
777 | if (memcmp(nic->primary_dns, nulls, | |
778 | sizeof(nic->primary_dns))) | |
779 | rc = 1; | |
780 | break; | |
781 | case ibft_eth_secondary_dns: | |
782 | if (memcmp(nic->secondary_dns, nulls, | |
783 | sizeof(nic->secondary_dns))) | |
784 | rc = 1; | |
785 | break; | |
786 | case ibft_eth_dhcp: | |
787 | if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) | |
788 | rc = 1; | |
789 | break; | |
790 | case ibft_eth_vlan: | |
791 | case ibft_eth_mac: | |
792 | rc = 1; | |
793 | break; | |
794 | case ibft_eth_hostname: | |
795 | if (nic->hostname_off) | |
796 | rc = 1; | |
797 | break; | |
798 | default: | |
799 | break; | |
800 | } | |
801 | ||
802 | return rc; | |
803 | } | |
804 | ||
805 | static int __init ibft_check_tgt_for(struct ibft_tgt *tgt, int entry) | |
806 | { | |
807 | int rc = 0; | |
808 | ||
809 | switch (entry) { | |
810 | case ibft_tgt_index: | |
811 | case ibft_tgt_flags: | |
812 | case ibft_tgt_ip_addr: | |
813 | case ibft_tgt_port: | |
814 | case ibft_tgt_lun: | |
815 | case ibft_tgt_nic_assoc: | |
816 | case ibft_tgt_chap_type: | |
817 | rc = 1; | |
818 | case ibft_tgt_name: | |
819 | if (tgt->tgt_name_len) | |
820 | rc = 1; | |
821 | break; | |
822 | case ibft_tgt_chap_name: | |
823 | case ibft_tgt_chap_secret: | |
824 | if (tgt->chap_name_len) | |
825 | rc = 1; | |
826 | break; | |
827 | case ibft_tgt_rev_chap_name: | |
828 | case ibft_tgt_rev_chap_secret: | |
829 | if (tgt->rev_chap_name_len) | |
830 | rc = 1; | |
831 | break; | |
832 | default: | |
833 | break; | |
834 | } | |
835 | ||
836 | return rc; | |
837 | } | |
838 | ||
839 | static int __init ibft_check_initiator_for(struct ibft_initiator *init, | |
840 | int entry) | |
841 | { | |
842 | int rc = 0; | |
843 | ||
844 | switch (entry) { | |
845 | case ibft_init_index: | |
846 | case ibft_init_flags: | |
847 | rc = 1; | |
848 | break; | |
849 | case ibft_init_isns_server: | |
850 | if (memcmp(init->isns_server, nulls, | |
851 | sizeof(init->isns_server))) | |
852 | rc = 1; | |
853 | break; | |
854 | case ibft_init_slp_server: | |
855 | if (memcmp(init->slp_server, nulls, | |
856 | sizeof(init->slp_server))) | |
857 | rc = 1; | |
858 | break; | |
859 | case ibft_init_pri_radius_server: | |
860 | if (memcmp(init->pri_radius_server, nulls, | |
861 | sizeof(init->pri_radius_server))) | |
862 | rc = 1; | |
863 | break; | |
864 | case ibft_init_sec_radius_server: | |
865 | if (memcmp(init->sec_radius_server, nulls, | |
866 | sizeof(init->sec_radius_server))) | |
867 | rc = 1; | |
868 | break; | |
869 | case ibft_init_initiator_name: | |
870 | if (init->initiator_name_len) | |
871 | rc = 1; | |
872 | break; | |
873 | default: | |
874 | break; | |
875 | } | |
876 | ||
877 | return rc; | |
878 | } | |
879 | ||
880 | /* | |
881 | * Register the attributes for all of the kobjects. | |
882 | */ | |
883 | static int __init ibft_register_attributes(struct list_head *kobject_list, | |
884 | struct list_head *attr_list) | |
885 | { | |
886 | int rc = 0, i = 0; | |
887 | struct ibft_kobject *data = NULL; | |
888 | struct ibft_attribute *attr = NULL, *m; | |
889 | ||
890 | list_for_each_entry(data, kobject_list, node) { | |
891 | switch (data->hdr->id) { | |
892 | case id_nic: | |
893 | for (i = 0; i < ibft_eth_end_marker && !rc; i++) | |
894 | if (ibft_check_nic_for(data->nic, i)) | |
895 | rc = ibft_create_attribute(data, i, | |
896 | ibft_eth_properties[i], | |
897 | ibft_attr_show_nic, attr_list); | |
898 | break; | |
899 | case id_target: | |
900 | for (i = 0; i < ibft_tgt_end_marker && !rc; i++) | |
901 | if (ibft_check_tgt_for(data->tgt, i)) | |
902 | rc = ibft_create_attribute(data, i, | |
903 | ibft_tgt_properties[i], | |
904 | ibft_attr_show_target, | |
905 | attr_list); | |
906 | break; | |
907 | case id_initiator: | |
908 | for (i = 0; i < ibft_init_end_marker && !rc; i++) | |
909 | if (ibft_check_initiator_for( | |
910 | data->initiator, i)) | |
911 | rc = ibft_create_attribute(data, i, | |
912 | ibft_initiator_properties[i], | |
913 | ibft_attr_show_initiator, | |
914 | attr_list); | |
915 | break; | |
916 | default: | |
917 | break; | |
918 | } | |
919 | if (rc) | |
920 | break; | |
921 | } | |
922 | list_for_each_entry_safe(attr, m, attr_list, node) { | |
923 | rc = sysfs_create_file(attr->kobj, &attr->attr); | |
924 | if (rc) { | |
925 | list_del(&attr->node); | |
926 | kfree(attr); | |
927 | break; | |
928 | } | |
929 | } | |
930 | ||
931 | return rc; | |
932 | } | |
933 | ||
934 | /* | |
935 | * ibft_init() - creates sysfs tree entries for the iBFT data. | |
936 | */ | |
937 | static int __init ibft_init(void) | |
938 | { | |
939 | int rc = 0; | |
940 | ||
941 | ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj); | |
942 | if (!ibft_kset) | |
943 | return -ENOMEM; | |
944 | ||
945 | if (ibft_addr) { | |
946 | printk(KERN_INFO "iBFT detected at 0x%lx.\n", | |
947 | virt_to_phys((void *)ibft_addr)); | |
948 | ||
949 | rc = ibft_check_device(); | |
950 | if (rc) | |
951 | goto out_firmware_unregister; | |
952 | ||
953 | /* Scan the IBFT for data and register the kobjects. */ | |
954 | rc = ibft_register_kobjects(ibft_addr, &ibft_kobject_list); | |
955 | if (rc) | |
956 | goto out_free; | |
957 | ||
958 | /* Register the attributes */ | |
959 | rc = ibft_register_attributes(&ibft_kobject_list, | |
960 | &ibft_attr_list); | |
961 | if (rc) | |
962 | goto out_free; | |
963 | } else | |
964 | printk(KERN_INFO "No iBFT detected.\n"); | |
965 | ||
966 | return 0; | |
967 | ||
968 | out_free: | |
969 | ibft_unregister(&ibft_attr_list, &ibft_kobject_list); | |
970 | out_firmware_unregister: | |
971 | kset_unregister(ibft_kset); | |
972 | return rc; | |
973 | } | |
974 | ||
975 | static void __exit ibft_exit(void) | |
976 | { | |
977 | ibft_unregister(&ibft_attr_list, &ibft_kobject_list); | |
978 | kset_unregister(ibft_kset); | |
979 | } | |
980 | ||
981 | module_init(ibft_init); | |
982 | module_exit(ibft_exit); |