This source file includes following definitions.
- address_not_null
- sprintf_ipaddr
- sprintf_string
- ibft_verify_hdr
- ibft_attr_show_initiator
- ibft_attr_show_nic
- ibft_attr_show_target
- ibft_attr_show_acpitbl
- ibft_check_device
- ibft_check_nic_for
- ibft_check_tgt_for
- ibft_check_initiator_for
- ibft_check_acpitbl_for
- ibft_kobj_release
- ibft_create_kobject
- ibft_register_kobjects
- ibft_unregister
- ibft_cleanup
- ibft_exit
- acpi_find_ibft_region
- acpi_find_ibft_region
- ibft_init
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61 #include <linux/blkdev.h>
62 #include <linux/capability.h>
63 #include <linux/ctype.h>
64 #include <linux/device.h>
65 #include <linux/err.h>
66 #include <linux/init.h>
67 #include <linux/iscsi_ibft.h>
68 #include <linux/limits.h>
69 #include <linux/module.h>
70 #include <linux/pci.h>
71 #include <linux/slab.h>
72 #include <linux/stat.h>
73 #include <linux/string.h>
74 #include <linux/types.h>
75 #include <linux/acpi.h>
76 #include <linux/iscsi_boot_sysfs.h>
77
78 #define IBFT_ISCSI_VERSION "0.5.0"
79 #define IBFT_ISCSI_DATE "2010-Feb-25"
80
81 MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and "
82 "Konrad Rzeszutek <ketuzsezr@darnok.org>");
83 MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
84 MODULE_LICENSE("GPL");
85 MODULE_VERSION(IBFT_ISCSI_VERSION);
86
87 #ifndef CONFIG_ISCSI_IBFT_FIND
88 struct acpi_table_ibft *ibft_addr;
89 #endif
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
156
157
158 enum ibft_id {
159 id_reserved = 0,
160 id_control = 1,
161 id_initiator = 2,
162 id_nic = 3,
163 id_target = 4,
164 id_extensions = 5,
165 id_end_marker,
166 };
167
168
169
170
171
172 struct ibft_kobject {
173 struct acpi_table_ibft *header;
174 union {
175 struct ibft_initiator *initiator;
176 struct ibft_nic *nic;
177 struct ibft_tgt *tgt;
178 struct ibft_hdr *hdr;
179 };
180 };
181
182 static struct iscsi_boot_kset *boot_kset;
183
184
185 static const char nulls[16];
186
187
188 static const char mapped_nulls[16] = { 0x00, 0x00, 0x00, 0x00,
189 0x00, 0x00, 0x00, 0x00,
190 0x00, 0x00, 0xff, 0xff,
191 0x00, 0x00, 0x00, 0x00 };
192
193 static int address_not_null(u8 *ip)
194 {
195 return (memcmp(ip, nulls, 16) && memcmp(ip, mapped_nulls, 16));
196 }
197
198
199
200
201 static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
202 {
203 char *str = buf;
204
205 if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 &&
206 ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 &&
207 ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) {
208
209
210
211 str += sprintf(buf, "%pI4", ip + 12);
212 } else {
213
214
215
216 str += sprintf(str, "%pI6", ip);
217 }
218 str += sprintf(str, "\n");
219 return str - buf;
220 }
221
222 static ssize_t sprintf_string(char *str, int len, char *buf)
223 {
224 return sprintf(str, "%.*s\n", len, buf);
225 }
226
227
228
229
230 static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length)
231 {
232 if (hdr->id != id) {
233 printk(KERN_ERR "iBFT error: We expected the %s " \
234 "field header.id to have %d but " \
235 "found %d instead!\n", t, id, hdr->id);
236 return -ENODEV;
237 }
238 if (hdr->length != length) {
239 printk(KERN_ERR "iBFT error: We expected the %s " \
240 "field header.length to have %d but " \
241 "found %d instead!\n", t, length, hdr->length);
242 return -ENODEV;
243 }
244
245 return 0;
246 }
247
248
249
250
251 static ssize_t ibft_attr_show_initiator(void *data, int type, char *buf)
252 {
253 struct ibft_kobject *entry = data;
254 struct ibft_initiator *initiator = entry->initiator;
255 void *ibft_loc = entry->header;
256 char *str = buf;
257
258 if (!initiator)
259 return 0;
260
261 switch (type) {
262 case ISCSI_BOOT_INI_INDEX:
263 str += sprintf(str, "%d\n", initiator->hdr.index);
264 break;
265 case ISCSI_BOOT_INI_FLAGS:
266 str += sprintf(str, "%d\n", initiator->hdr.flags);
267 break;
268 case ISCSI_BOOT_INI_ISNS_SERVER:
269 str += sprintf_ipaddr(str, initiator->isns_server);
270 break;
271 case ISCSI_BOOT_INI_SLP_SERVER:
272 str += sprintf_ipaddr(str, initiator->slp_server);
273 break;
274 case ISCSI_BOOT_INI_PRI_RADIUS_SERVER:
275 str += sprintf_ipaddr(str, initiator->pri_radius_server);
276 break;
277 case ISCSI_BOOT_INI_SEC_RADIUS_SERVER:
278 str += sprintf_ipaddr(str, initiator->sec_radius_server);
279 break;
280 case ISCSI_BOOT_INI_INITIATOR_NAME:
281 str += sprintf_string(str, initiator->initiator_name_len,
282 (char *)ibft_loc +
283 initiator->initiator_name_off);
284 break;
285 default:
286 break;
287 }
288
289 return str - buf;
290 }
291
292 static ssize_t ibft_attr_show_nic(void *data, int type, char *buf)
293 {
294 struct ibft_kobject *entry = data;
295 struct ibft_nic *nic = entry->nic;
296 void *ibft_loc = entry->header;
297 char *str = buf;
298 __be32 val;
299
300 if (!nic)
301 return 0;
302
303 switch (type) {
304 case ISCSI_BOOT_ETH_INDEX:
305 str += sprintf(str, "%d\n", nic->hdr.index);
306 break;
307 case ISCSI_BOOT_ETH_FLAGS:
308 str += sprintf(str, "%d\n", nic->hdr.flags);
309 break;
310 case ISCSI_BOOT_ETH_IP_ADDR:
311 str += sprintf_ipaddr(str, nic->ip_addr);
312 break;
313 case ISCSI_BOOT_ETH_SUBNET_MASK:
314 val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1));
315 str += sprintf(str, "%pI4", &val);
316 break;
317 case ISCSI_BOOT_ETH_PREFIX_LEN:
318 str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
319 break;
320 case ISCSI_BOOT_ETH_ORIGIN:
321 str += sprintf(str, "%d\n", nic->origin);
322 break;
323 case ISCSI_BOOT_ETH_GATEWAY:
324 str += sprintf_ipaddr(str, nic->gateway);
325 break;
326 case ISCSI_BOOT_ETH_PRIMARY_DNS:
327 str += sprintf_ipaddr(str, nic->primary_dns);
328 break;
329 case ISCSI_BOOT_ETH_SECONDARY_DNS:
330 str += sprintf_ipaddr(str, nic->secondary_dns);
331 break;
332 case ISCSI_BOOT_ETH_DHCP:
333 str += sprintf_ipaddr(str, nic->dhcp);
334 break;
335 case ISCSI_BOOT_ETH_VLAN:
336 str += sprintf(str, "%d\n", nic->vlan);
337 break;
338 case ISCSI_BOOT_ETH_MAC:
339 str += sprintf(str, "%pM\n", nic->mac);
340 break;
341 case ISCSI_BOOT_ETH_HOSTNAME:
342 str += sprintf_string(str, nic->hostname_len,
343 (char *)ibft_loc + nic->hostname_off);
344 break;
345 default:
346 break;
347 }
348
349 return str - buf;
350 };
351
352 static ssize_t ibft_attr_show_target(void *data, int type, char *buf)
353 {
354 struct ibft_kobject *entry = data;
355 struct ibft_tgt *tgt = entry->tgt;
356 void *ibft_loc = entry->header;
357 char *str = buf;
358 int i;
359
360 if (!tgt)
361 return 0;
362
363 switch (type) {
364 case ISCSI_BOOT_TGT_INDEX:
365 str += sprintf(str, "%d\n", tgt->hdr.index);
366 break;
367 case ISCSI_BOOT_TGT_FLAGS:
368 str += sprintf(str, "%d\n", tgt->hdr.flags);
369 break;
370 case ISCSI_BOOT_TGT_IP_ADDR:
371 str += sprintf_ipaddr(str, tgt->ip_addr);
372 break;
373 case ISCSI_BOOT_TGT_PORT:
374 str += sprintf(str, "%d\n", tgt->port);
375 break;
376 case ISCSI_BOOT_TGT_LUN:
377 for (i = 0; i < 8; i++)
378 str += sprintf(str, "%x", (u8)tgt->lun[i]);
379 str += sprintf(str, "\n");
380 break;
381 case ISCSI_BOOT_TGT_NIC_ASSOC:
382 str += sprintf(str, "%d\n", tgt->nic_assoc);
383 break;
384 case ISCSI_BOOT_TGT_CHAP_TYPE:
385 str += sprintf(str, "%d\n", tgt->chap_type);
386 break;
387 case ISCSI_BOOT_TGT_NAME:
388 str += sprintf_string(str, tgt->tgt_name_len,
389 (char *)ibft_loc + tgt->tgt_name_off);
390 break;
391 case ISCSI_BOOT_TGT_CHAP_NAME:
392 str += sprintf_string(str, tgt->chap_name_len,
393 (char *)ibft_loc + tgt->chap_name_off);
394 break;
395 case ISCSI_BOOT_TGT_CHAP_SECRET:
396 str += sprintf_string(str, tgt->chap_secret_len,
397 (char *)ibft_loc + tgt->chap_secret_off);
398 break;
399 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
400 str += sprintf_string(str, tgt->rev_chap_name_len,
401 (char *)ibft_loc +
402 tgt->rev_chap_name_off);
403 break;
404 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
405 str += sprintf_string(str, tgt->rev_chap_secret_len,
406 (char *)ibft_loc +
407 tgt->rev_chap_secret_off);
408 break;
409 default:
410 break;
411 }
412
413 return str - buf;
414 }
415
416 static ssize_t ibft_attr_show_acpitbl(void *data, int type, char *buf)
417 {
418 struct ibft_kobject *entry = data;
419 char *str = buf;
420
421 switch (type) {
422 case ISCSI_BOOT_ACPITBL_SIGNATURE:
423 str += sprintf_string(str, ACPI_NAMESEG_SIZE,
424 entry->header->header.signature);
425 break;
426 case ISCSI_BOOT_ACPITBL_OEM_ID:
427 str += sprintf_string(str, ACPI_OEM_ID_SIZE,
428 entry->header->header.oem_id);
429 break;
430 case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID:
431 str += sprintf_string(str, ACPI_OEM_TABLE_ID_SIZE,
432 entry->header->header.oem_table_id);
433 break;
434 default:
435 break;
436 }
437
438 return str - buf;
439 }
440
441 static int __init ibft_check_device(void)
442 {
443 int len;
444 u8 *pos;
445 u8 csum = 0;
446
447 len = ibft_addr->header.length;
448
449
450 if (ibft_addr->header.revision != 1) {
451 printk(KERN_ERR "iBFT module supports only revision 1, " \
452 "while this is %d.\n",
453 ibft_addr->header.revision);
454 return -ENOENT;
455 }
456 for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++)
457 csum += *pos;
458
459 if (csum) {
460 printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum);
461 return -ENOENT;
462 }
463
464 return 0;
465 }
466
467
468
469
470
471 static umode_t ibft_check_nic_for(void *data, int type)
472 {
473 struct ibft_kobject *entry = data;
474 struct ibft_nic *nic = entry->nic;
475 umode_t rc = 0;
476
477 switch (type) {
478 case ISCSI_BOOT_ETH_INDEX:
479 case ISCSI_BOOT_ETH_FLAGS:
480 rc = S_IRUGO;
481 break;
482 case ISCSI_BOOT_ETH_IP_ADDR:
483 if (address_not_null(nic->ip_addr))
484 rc = S_IRUGO;
485 break;
486 case ISCSI_BOOT_ETH_PREFIX_LEN:
487 case ISCSI_BOOT_ETH_SUBNET_MASK:
488 if (nic->subnet_mask_prefix)
489 rc = S_IRUGO;
490 break;
491 case ISCSI_BOOT_ETH_ORIGIN:
492 rc = S_IRUGO;
493 break;
494 case ISCSI_BOOT_ETH_GATEWAY:
495 if (address_not_null(nic->gateway))
496 rc = S_IRUGO;
497 break;
498 case ISCSI_BOOT_ETH_PRIMARY_DNS:
499 if (address_not_null(nic->primary_dns))
500 rc = S_IRUGO;
501 break;
502 case ISCSI_BOOT_ETH_SECONDARY_DNS:
503 if (address_not_null(nic->secondary_dns))
504 rc = S_IRUGO;
505 break;
506 case ISCSI_BOOT_ETH_DHCP:
507 if (address_not_null(nic->dhcp))
508 rc = S_IRUGO;
509 break;
510 case ISCSI_BOOT_ETH_VLAN:
511 case ISCSI_BOOT_ETH_MAC:
512 rc = S_IRUGO;
513 break;
514 case ISCSI_BOOT_ETH_HOSTNAME:
515 if (nic->hostname_off)
516 rc = S_IRUGO;
517 break;
518 default:
519 break;
520 }
521
522 return rc;
523 }
524
525 static umode_t __init ibft_check_tgt_for(void *data, int type)
526 {
527 struct ibft_kobject *entry = data;
528 struct ibft_tgt *tgt = entry->tgt;
529 umode_t rc = 0;
530
531 switch (type) {
532 case ISCSI_BOOT_TGT_INDEX:
533 case ISCSI_BOOT_TGT_FLAGS:
534 case ISCSI_BOOT_TGT_IP_ADDR:
535 case ISCSI_BOOT_TGT_PORT:
536 case ISCSI_BOOT_TGT_LUN:
537 case ISCSI_BOOT_TGT_NIC_ASSOC:
538 case ISCSI_BOOT_TGT_CHAP_TYPE:
539 rc = S_IRUGO;
540 break;
541 case ISCSI_BOOT_TGT_NAME:
542 if (tgt->tgt_name_len)
543 rc = S_IRUGO;
544 break;
545 case ISCSI_BOOT_TGT_CHAP_NAME:
546 case ISCSI_BOOT_TGT_CHAP_SECRET:
547 if (tgt->chap_name_len)
548 rc = S_IRUGO;
549 break;
550 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
551 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
552 if (tgt->rev_chap_name_len)
553 rc = S_IRUGO;
554 break;
555 default:
556 break;
557 }
558
559 return rc;
560 }
561
562 static umode_t __init ibft_check_initiator_for(void *data, int type)
563 {
564 struct ibft_kobject *entry = data;
565 struct ibft_initiator *init = entry->initiator;
566 umode_t rc = 0;
567
568 switch (type) {
569 case ISCSI_BOOT_INI_INDEX:
570 case ISCSI_BOOT_INI_FLAGS:
571 rc = S_IRUGO;
572 break;
573 case ISCSI_BOOT_INI_ISNS_SERVER:
574 if (address_not_null(init->isns_server))
575 rc = S_IRUGO;
576 break;
577 case ISCSI_BOOT_INI_SLP_SERVER:
578 if (address_not_null(init->slp_server))
579 rc = S_IRUGO;
580 break;
581 case ISCSI_BOOT_INI_PRI_RADIUS_SERVER:
582 if (address_not_null(init->pri_radius_server))
583 rc = S_IRUGO;
584 break;
585 case ISCSI_BOOT_INI_SEC_RADIUS_SERVER:
586 if (address_not_null(init->sec_radius_server))
587 rc = S_IRUGO;
588 break;
589 case ISCSI_BOOT_INI_INITIATOR_NAME:
590 if (init->initiator_name_len)
591 rc = S_IRUGO;
592 break;
593 default:
594 break;
595 }
596
597 return rc;
598 }
599
600 static umode_t __init ibft_check_acpitbl_for(void *data, int type)
601 {
602
603 umode_t rc = 0;
604
605 switch (type) {
606 case ISCSI_BOOT_ACPITBL_SIGNATURE:
607 case ISCSI_BOOT_ACPITBL_OEM_ID:
608 case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID:
609 rc = S_IRUGO;
610 break;
611 default:
612 break;
613 }
614
615 return rc;
616 }
617
618 static void ibft_kobj_release(void *data)
619 {
620 kfree(data);
621 }
622
623
624
625
626 static int __init ibft_create_kobject(struct acpi_table_ibft *header,
627 struct ibft_hdr *hdr)
628 {
629 struct iscsi_boot_kobj *boot_kobj = NULL;
630 struct ibft_kobject *ibft_kobj = NULL;
631 struct ibft_nic *nic = (struct ibft_nic *)hdr;
632 struct pci_dev *pci_dev;
633 int rc = 0;
634
635 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
636 if (!ibft_kobj)
637 return -ENOMEM;
638
639 ibft_kobj->header = header;
640 ibft_kobj->hdr = hdr;
641
642 switch (hdr->id) {
643 case id_initiator:
644 rc = ibft_verify_hdr("initiator", hdr, id_initiator,
645 sizeof(*ibft_kobj->initiator));
646 if (rc)
647 break;
648
649 boot_kobj = iscsi_boot_create_initiator(boot_kset, hdr->index,
650 ibft_kobj,
651 ibft_attr_show_initiator,
652 ibft_check_initiator_for,
653 ibft_kobj_release);
654 if (!boot_kobj) {
655 rc = -ENOMEM;
656 goto free_ibft_obj;
657 }
658 break;
659 case id_nic:
660 rc = ibft_verify_hdr("ethernet", hdr, id_nic,
661 sizeof(*ibft_kobj->nic));
662 if (rc)
663 break;
664
665 boot_kobj = iscsi_boot_create_ethernet(boot_kset, hdr->index,
666 ibft_kobj,
667 ibft_attr_show_nic,
668 ibft_check_nic_for,
669 ibft_kobj_release);
670 if (!boot_kobj) {
671 rc = -ENOMEM;
672 goto free_ibft_obj;
673 }
674 break;
675 case id_target:
676 rc = ibft_verify_hdr("target", hdr, id_target,
677 sizeof(*ibft_kobj->tgt));
678 if (rc)
679 break;
680
681 boot_kobj = iscsi_boot_create_target(boot_kset, hdr->index,
682 ibft_kobj,
683 ibft_attr_show_target,
684 ibft_check_tgt_for,
685 ibft_kobj_release);
686 if (!boot_kobj) {
687 rc = -ENOMEM;
688 goto free_ibft_obj;
689 }
690 break;
691 case id_reserved:
692 case id_control:
693 case id_extensions:
694
695 rc = 1;
696 break;
697 default:
698 printk(KERN_ERR "iBFT has unknown structure type (%d). " \
699 "Report this bug to %.6s!\n", hdr->id,
700 header->header.oem_id);
701 rc = 1;
702 break;
703 }
704
705 if (rc) {
706
707 rc = 0;
708 goto free_ibft_obj;
709 }
710
711 if (hdr->id == id_nic) {
712
713
714
715
716
717
718 pci_dev = pci_get_domain_bus_and_slot(0,
719 (nic->pci_bdf & 0xff00) >> 8,
720 (nic->pci_bdf & 0xff));
721 if (pci_dev) {
722 rc = sysfs_create_link(&boot_kobj->kobj,
723 &pci_dev->dev.kobj, "device");
724 pci_dev_put(pci_dev);
725 }
726 }
727 return 0;
728
729 free_ibft_obj:
730 kfree(ibft_kobj);
731 return rc;
732 }
733
734
735
736
737
738
739 static int __init ibft_register_kobjects(struct acpi_table_ibft *header)
740 {
741 struct ibft_control *control = NULL;
742 struct iscsi_boot_kobj *boot_kobj;
743 struct ibft_kobject *ibft_kobj;
744 void *ptr, *end;
745 int rc = 0;
746 u16 offset;
747 u16 eot_offset;
748
749 control = (void *)header + sizeof(*header);
750 end = (void *)control + control->hdr.length;
751 eot_offset = (void *)header + header->header.length - (void *)control;
752 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
753 sizeof(*control));
754
755
756 rc |= ((control->hdr.index) ? -ENODEV : 0);
757 if (rc) {
758 printk(KERN_ERR "iBFT error: Control header is invalid!\n");
759 return rc;
760 }
761 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
762 offset = *(u16 *)ptr;
763 if (offset && offset < header->header.length &&
764 offset < eot_offset) {
765 rc = ibft_create_kobject(header,
766 (void *)header + offset);
767 if (rc)
768 break;
769 }
770 }
771 if (rc)
772 return rc;
773
774 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
775 if (!ibft_kobj)
776 return -ENOMEM;
777
778 ibft_kobj->header = header;
779 ibft_kobj->hdr = NULL;
780
781 boot_kobj = iscsi_boot_create_acpitbl(boot_kset, 0,
782 ibft_kobj,
783 ibft_attr_show_acpitbl,
784 ibft_check_acpitbl_for,
785 ibft_kobj_release);
786 if (!boot_kobj) {
787 kfree(ibft_kobj);
788 rc = -ENOMEM;
789 }
790
791 return rc;
792 }
793
794 static void ibft_unregister(void)
795 {
796 struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;
797 struct ibft_kobject *ibft_kobj;
798
799 list_for_each_entry_safe(boot_kobj, tmp_kobj,
800 &boot_kset->kobj_list, list) {
801 ibft_kobj = boot_kobj->data;
802 if (ibft_kobj->hdr && ibft_kobj->hdr->id == id_nic)
803 sysfs_remove_link(&boot_kobj->kobj, "device");
804 };
805 }
806
807 static void ibft_cleanup(void)
808 {
809 if (boot_kset) {
810 ibft_unregister();
811 iscsi_boot_destroy_kset(boot_kset);
812 }
813 }
814
815 static void __exit ibft_exit(void)
816 {
817 ibft_cleanup();
818 }
819
820 #ifdef CONFIG_ACPI
821 static const struct {
822 char *sign;
823 } ibft_signs[] = {
824
825
826
827
828 { ACPI_SIG_IBFT },
829 { "iBFT" },
830 { "BIFT" },
831 };
832
833 static void __init acpi_find_ibft_region(void)
834 {
835 int i;
836 struct acpi_table_header *table = NULL;
837
838 if (acpi_disabled)
839 return;
840
841 for (i = 0; i < ARRAY_SIZE(ibft_signs) && !ibft_addr; i++) {
842 acpi_get_table(ibft_signs[i].sign, 0, &table);
843 ibft_addr = (struct acpi_table_ibft *)table;
844 }
845 }
846 #else
847 static void __init acpi_find_ibft_region(void)
848 {
849 }
850 #endif
851
852
853
854
855 static int __init ibft_init(void)
856 {
857 int rc = 0;
858
859
860
861
862
863
864 if (!ibft_addr)
865 acpi_find_ibft_region();
866
867 if (ibft_addr) {
868 pr_info("iBFT detected.\n");
869
870 rc = ibft_check_device();
871 if (rc)
872 return rc;
873
874 boot_kset = iscsi_boot_create_kset("ibft");
875 if (!boot_kset)
876 return -ENOMEM;
877
878
879 rc = ibft_register_kobjects(ibft_addr);
880 if (rc)
881 goto out_free;
882 } else
883 printk(KERN_INFO "No iBFT detected.\n");
884
885 return 0;
886
887 out_free:
888 ibft_cleanup();
889 return rc;
890 }
891
892 module_init(ibft_init);
893 module_exit(ibft_exit);