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70#include <linux/blkdev.h>
71#include <linux/capability.h>
72#include <linux/ctype.h>
73#include <linux/device.h>
74#include <linux/err.h>
75#include <linux/init.h>
76#include <linux/iscsi_ibft.h>
77#include <linux/limits.h>
78#include <linux/module.h>
79#include <linux/pci.h>
80#include <linux/slab.h>
81#include <linux/stat.h>
82#include <linux/string.h>
83#include <linux/types.h>
84#include <linux/acpi.h>
85#include <linux/iscsi_boot_sysfs.h>
86
87#define IBFT_ISCSI_VERSION "0.5.0"
88#define IBFT_ISCSI_DATE "2010-Feb-25"
89
90MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and "
91 "Konrad Rzeszutek <ketuzsezr@darnok.org>");
92MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
93MODULE_LICENSE("GPL");
94MODULE_VERSION(IBFT_ISCSI_VERSION);
95
96struct ibft_hdr {
97 u8 id;
98 u8 version;
99 u16 length;
100 u8 index;
101 u8 flags;
102} __attribute__((__packed__));
103
104struct ibft_control {
105 struct ibft_hdr hdr;
106 u16 extensions;
107 u16 initiator_off;
108 u16 nic0_off;
109 u16 tgt0_off;
110 u16 nic1_off;
111 u16 tgt1_off;
112} __attribute__((__packed__));
113
114struct ibft_initiator {
115 struct ibft_hdr hdr;
116 char isns_server[16];
117 char slp_server[16];
118 char pri_radius_server[16];
119 char sec_radius_server[16];
120 u16 initiator_name_len;
121 u16 initiator_name_off;
122} __attribute__((__packed__));
123
124struct ibft_nic {
125 struct ibft_hdr hdr;
126 char ip_addr[16];
127 u8 subnet_mask_prefix;
128 u8 origin;
129 char gateway[16];
130 char primary_dns[16];
131 char secondary_dns[16];
132 char dhcp[16];
133 u16 vlan;
134 char mac[6];
135 u16 pci_bdf;
136 u16 hostname_len;
137 u16 hostname_off;
138} __attribute__((__packed__));
139
140struct ibft_tgt {
141 struct ibft_hdr hdr;
142 char ip_addr[16];
143 u16 port;
144 char lun[8];
145 u8 chap_type;
146 u8 nic_assoc;
147 u16 tgt_name_len;
148 u16 tgt_name_off;
149 u16 chap_name_len;
150 u16 chap_name_off;
151 u16 chap_secret_len;
152 u16 chap_secret_off;
153 u16 rev_chap_name_len;
154 u16 rev_chap_name_off;
155 u16 rev_chap_secret_len;
156 u16 rev_chap_secret_off;
157} __attribute__((__packed__));
158
159
160
161
162
163enum ibft_id {
164 id_reserved = 0,
165 id_control = 1,
166 id_initiator = 2,
167 id_nic = 3,
168 id_target = 4,
169 id_extensions = 5,
170 id_end_marker,
171};
172
173
174
175
176
177struct ibft_kobject {
178 struct acpi_table_ibft *header;
179 union {
180 struct ibft_initiator *initiator;
181 struct ibft_nic *nic;
182 struct ibft_tgt *tgt;
183 struct ibft_hdr *hdr;
184 };
185};
186
187static struct iscsi_boot_kset *boot_kset;
188
189
190static const char nulls[16];
191
192
193static const char mapped_nulls[16] = { 0x00, 0x00, 0x00, 0x00,
194 0x00, 0x00, 0x00, 0x00,
195 0x00, 0x00, 0xff, 0xff,
196 0x00, 0x00, 0x00, 0x00 };
197
198static int address_not_null(u8 *ip)
199{
200 return (memcmp(ip, nulls, 16) && memcmp(ip, mapped_nulls, 16));
201}
202
203
204
205
206static ssize_t sprintf_ipaddr(char *buf, u8 *ip)
207{
208 char *str = buf;
209
210 if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 &&
211 ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 &&
212 ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) {
213
214
215
216 str += sprintf(buf, "%pI4", ip + 12);
217 } else {
218
219
220
221 str += sprintf(str, "%pI6", ip);
222 }
223 str += sprintf(str, "\n");
224 return str - buf;
225}
226
227static ssize_t sprintf_string(char *str, int len, char *buf)
228{
229 return sprintf(str, "%.*s\n", len, buf);
230}
231
232
233
234
235static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length)
236{
237 if (hdr->id != id) {
238 printk(KERN_ERR "iBFT error: We expected the %s " \
239 "field header.id to have %d but " \
240 "found %d instead!\n", t, id, hdr->id);
241 return -ENODEV;
242 }
243 if (hdr->length != length) {
244 printk(KERN_ERR "iBFT error: We expected the %s " \
245 "field header.length to have %d but " \
246 "found %d instead!\n", t, length, hdr->length);
247 return -ENODEV;
248 }
249
250 return 0;
251}
252
253
254
255
256static ssize_t ibft_attr_show_initiator(void *data, int type, char *buf)
257{
258 struct ibft_kobject *entry = data;
259 struct ibft_initiator *initiator = entry->initiator;
260 void *ibft_loc = entry->header;
261 char *str = buf;
262
263 if (!initiator)
264 return 0;
265
266 switch (type) {
267 case ISCSI_BOOT_INI_INDEX:
268 str += sprintf(str, "%d\n", initiator->hdr.index);
269 break;
270 case ISCSI_BOOT_INI_FLAGS:
271 str += sprintf(str, "%d\n", initiator->hdr.flags);
272 break;
273 case ISCSI_BOOT_INI_ISNS_SERVER:
274 str += sprintf_ipaddr(str, initiator->isns_server);
275 break;
276 case ISCSI_BOOT_INI_SLP_SERVER:
277 str += sprintf_ipaddr(str, initiator->slp_server);
278 break;
279 case ISCSI_BOOT_INI_PRI_RADIUS_SERVER:
280 str += sprintf_ipaddr(str, initiator->pri_radius_server);
281 break;
282 case ISCSI_BOOT_INI_SEC_RADIUS_SERVER:
283 str += sprintf_ipaddr(str, initiator->sec_radius_server);
284 break;
285 case ISCSI_BOOT_INI_INITIATOR_NAME:
286 str += sprintf_string(str, initiator->initiator_name_len,
287 (char *)ibft_loc +
288 initiator->initiator_name_off);
289 break;
290 default:
291 break;
292 }
293
294 return str - buf;
295}
296
297static ssize_t ibft_attr_show_nic(void *data, int type, char *buf)
298{
299 struct ibft_kobject *entry = data;
300 struct ibft_nic *nic = entry->nic;
301 void *ibft_loc = entry->header;
302 char *str = buf;
303 __be32 val;
304
305 if (!nic)
306 return 0;
307
308 switch (type) {
309 case ISCSI_BOOT_ETH_INDEX:
310 str += sprintf(str, "%d\n", nic->hdr.index);
311 break;
312 case ISCSI_BOOT_ETH_FLAGS:
313 str += sprintf(str, "%d\n", nic->hdr.flags);
314 break;
315 case ISCSI_BOOT_ETH_IP_ADDR:
316 str += sprintf_ipaddr(str, nic->ip_addr);
317 break;
318 case ISCSI_BOOT_ETH_SUBNET_MASK:
319 val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1));
320 str += sprintf(str, "%pI4", &val);
321 break;
322 case ISCSI_BOOT_ETH_PREFIX_LEN:
323 str += sprintf(str, "%d\n", nic->subnet_mask_prefix);
324 break;
325 case ISCSI_BOOT_ETH_ORIGIN:
326 str += sprintf(str, "%d\n", nic->origin);
327 break;
328 case ISCSI_BOOT_ETH_GATEWAY:
329 str += sprintf_ipaddr(str, nic->gateway);
330 break;
331 case ISCSI_BOOT_ETH_PRIMARY_DNS:
332 str += sprintf_ipaddr(str, nic->primary_dns);
333 break;
334 case ISCSI_BOOT_ETH_SECONDARY_DNS:
335 str += sprintf_ipaddr(str, nic->secondary_dns);
336 break;
337 case ISCSI_BOOT_ETH_DHCP:
338 str += sprintf_ipaddr(str, nic->dhcp);
339 break;
340 case ISCSI_BOOT_ETH_VLAN:
341 str += sprintf(str, "%d\n", nic->vlan);
342 break;
343 case ISCSI_BOOT_ETH_MAC:
344 str += sprintf(str, "%pM\n", nic->mac);
345 break;
346 case ISCSI_BOOT_ETH_HOSTNAME:
347 str += sprintf_string(str, nic->hostname_len,
348 (char *)ibft_loc + nic->hostname_off);
349 break;
350 default:
351 break;
352 }
353
354 return str - buf;
355};
356
357static ssize_t ibft_attr_show_target(void *data, int type, char *buf)
358{
359 struct ibft_kobject *entry = data;
360 struct ibft_tgt *tgt = entry->tgt;
361 void *ibft_loc = entry->header;
362 char *str = buf;
363 int i;
364
365 if (!tgt)
366 return 0;
367
368 switch (type) {
369 case ISCSI_BOOT_TGT_INDEX:
370 str += sprintf(str, "%d\n", tgt->hdr.index);
371 break;
372 case ISCSI_BOOT_TGT_FLAGS:
373 str += sprintf(str, "%d\n", tgt->hdr.flags);
374 break;
375 case ISCSI_BOOT_TGT_IP_ADDR:
376 str += sprintf_ipaddr(str, tgt->ip_addr);
377 break;
378 case ISCSI_BOOT_TGT_PORT:
379 str += sprintf(str, "%d\n", tgt->port);
380 break;
381 case ISCSI_BOOT_TGT_LUN:
382 for (i = 0; i < 8; i++)
383 str += sprintf(str, "%x", (u8)tgt->lun[i]);
384 str += sprintf(str, "\n");
385 break;
386 case ISCSI_BOOT_TGT_NIC_ASSOC:
387 str += sprintf(str, "%d\n", tgt->nic_assoc);
388 break;
389 case ISCSI_BOOT_TGT_CHAP_TYPE:
390 str += sprintf(str, "%d\n", tgt->chap_type);
391 break;
392 case ISCSI_BOOT_TGT_NAME:
393 str += sprintf_string(str, tgt->tgt_name_len,
394 (char *)ibft_loc + tgt->tgt_name_off);
395 break;
396 case ISCSI_BOOT_TGT_CHAP_NAME:
397 str += sprintf_string(str, tgt->chap_name_len,
398 (char *)ibft_loc + tgt->chap_name_off);
399 break;
400 case ISCSI_BOOT_TGT_CHAP_SECRET:
401 str += sprintf_string(str, tgt->chap_secret_len,
402 (char *)ibft_loc + tgt->chap_secret_off);
403 break;
404 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
405 str += sprintf_string(str, tgt->rev_chap_name_len,
406 (char *)ibft_loc +
407 tgt->rev_chap_name_off);
408 break;
409 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
410 str += sprintf_string(str, tgt->rev_chap_secret_len,
411 (char *)ibft_loc +
412 tgt->rev_chap_secret_off);
413 break;
414 default:
415 break;
416 }
417
418 return str - buf;
419}
420
421static ssize_t ibft_attr_show_acpitbl(void *data, int type, char *buf)
422{
423 struct ibft_kobject *entry = data;
424 char *str = buf;
425
426 switch (type) {
427 case ISCSI_BOOT_ACPITBL_SIGNATURE:
428 str += sprintf_string(str, ACPI_NAME_SIZE,
429 entry->header->header.signature);
430 break;
431 case ISCSI_BOOT_ACPITBL_OEM_ID:
432 str += sprintf_string(str, ACPI_OEM_ID_SIZE,
433 entry->header->header.oem_id);
434 break;
435 case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID:
436 str += sprintf_string(str, ACPI_OEM_TABLE_ID_SIZE,
437 entry->header->header.oem_table_id);
438 break;
439 default:
440 break;
441 }
442
443 return str - buf;
444}
445
446static int __init ibft_check_device(void)
447{
448 int len;
449 u8 *pos;
450 u8 csum = 0;
451
452 len = ibft_addr->header.length;
453
454
455 if (ibft_addr->header.revision != 1) {
456 printk(KERN_ERR "iBFT module supports only revision 1, " \
457 "while this is %d.\n",
458 ibft_addr->header.revision);
459 return -ENOENT;
460 }
461 for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++)
462 csum += *pos;
463
464 if (csum) {
465 printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum);
466 return -ENOENT;
467 }
468
469 return 0;
470}
471
472
473
474
475
476static umode_t ibft_check_nic_for(void *data, int type)
477{
478 struct ibft_kobject *entry = data;
479 struct ibft_nic *nic = entry->nic;
480 umode_t rc = 0;
481
482 switch (type) {
483 case ISCSI_BOOT_ETH_INDEX:
484 case ISCSI_BOOT_ETH_FLAGS:
485 rc = S_IRUGO;
486 break;
487 case ISCSI_BOOT_ETH_IP_ADDR:
488 if (address_not_null(nic->ip_addr))
489 rc = S_IRUGO;
490 break;
491 case ISCSI_BOOT_ETH_PREFIX_LEN:
492 case ISCSI_BOOT_ETH_SUBNET_MASK:
493 if (nic->subnet_mask_prefix)
494 rc = S_IRUGO;
495 break;
496 case ISCSI_BOOT_ETH_ORIGIN:
497 rc = S_IRUGO;
498 break;
499 case ISCSI_BOOT_ETH_GATEWAY:
500 if (address_not_null(nic->gateway))
501 rc = S_IRUGO;
502 break;
503 case ISCSI_BOOT_ETH_PRIMARY_DNS:
504 if (address_not_null(nic->primary_dns))
505 rc = S_IRUGO;
506 break;
507 case ISCSI_BOOT_ETH_SECONDARY_DNS:
508 if (address_not_null(nic->secondary_dns))
509 rc = S_IRUGO;
510 break;
511 case ISCSI_BOOT_ETH_DHCP:
512 if (address_not_null(nic->dhcp))
513 rc = S_IRUGO;
514 break;
515 case ISCSI_BOOT_ETH_VLAN:
516 case ISCSI_BOOT_ETH_MAC:
517 rc = S_IRUGO;
518 break;
519 case ISCSI_BOOT_ETH_HOSTNAME:
520 if (nic->hostname_off)
521 rc = S_IRUGO;
522 break;
523 default:
524 break;
525 }
526
527 return rc;
528}
529
530static umode_t __init ibft_check_tgt_for(void *data, int type)
531{
532 struct ibft_kobject *entry = data;
533 struct ibft_tgt *tgt = entry->tgt;
534 umode_t rc = 0;
535
536 switch (type) {
537 case ISCSI_BOOT_TGT_INDEX:
538 case ISCSI_BOOT_TGT_FLAGS:
539 case ISCSI_BOOT_TGT_IP_ADDR:
540 case ISCSI_BOOT_TGT_PORT:
541 case ISCSI_BOOT_TGT_LUN:
542 case ISCSI_BOOT_TGT_NIC_ASSOC:
543 case ISCSI_BOOT_TGT_CHAP_TYPE:
544 rc = S_IRUGO;
545 case ISCSI_BOOT_TGT_NAME:
546 if (tgt->tgt_name_len)
547 rc = S_IRUGO;
548 break;
549 case ISCSI_BOOT_TGT_CHAP_NAME:
550 case ISCSI_BOOT_TGT_CHAP_SECRET:
551 if (tgt->chap_name_len)
552 rc = S_IRUGO;
553 break;
554 case ISCSI_BOOT_TGT_REV_CHAP_NAME:
555 case ISCSI_BOOT_TGT_REV_CHAP_SECRET:
556 if (tgt->rev_chap_name_len)
557 rc = S_IRUGO;
558 break;
559 default:
560 break;
561 }
562
563 return rc;
564}
565
566static umode_t __init ibft_check_initiator_for(void *data, int type)
567{
568 struct ibft_kobject *entry = data;
569 struct ibft_initiator *init = entry->initiator;
570 umode_t rc = 0;
571
572 switch (type) {
573 case ISCSI_BOOT_INI_INDEX:
574 case ISCSI_BOOT_INI_FLAGS:
575 rc = S_IRUGO;
576 break;
577 case ISCSI_BOOT_INI_ISNS_SERVER:
578 if (address_not_null(init->isns_server))
579 rc = S_IRUGO;
580 break;
581 case ISCSI_BOOT_INI_SLP_SERVER:
582 if (address_not_null(init->slp_server))
583 rc = S_IRUGO;
584 break;
585 case ISCSI_BOOT_INI_PRI_RADIUS_SERVER:
586 if (address_not_null(init->pri_radius_server))
587 rc = S_IRUGO;
588 break;
589 case ISCSI_BOOT_INI_SEC_RADIUS_SERVER:
590 if (address_not_null(init->sec_radius_server))
591 rc = S_IRUGO;
592 break;
593 case ISCSI_BOOT_INI_INITIATOR_NAME:
594 if (init->initiator_name_len)
595 rc = S_IRUGO;
596 break;
597 default:
598 break;
599 }
600
601 return rc;
602}
603
604static umode_t __init ibft_check_acpitbl_for(void *data, int type)
605{
606
607 umode_t rc = 0;
608
609 switch (type) {
610 case ISCSI_BOOT_ACPITBL_SIGNATURE:
611 case ISCSI_BOOT_ACPITBL_OEM_ID:
612 case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID:
613 rc = S_IRUGO;
614 break;
615 default:
616 break;
617 }
618
619 return rc;
620}
621
622static void ibft_kobj_release(void *data)
623{
624 kfree(data);
625}
626
627
628
629
630static int __init ibft_create_kobject(struct acpi_table_ibft *header,
631 struct ibft_hdr *hdr)
632{
633 struct iscsi_boot_kobj *boot_kobj = NULL;
634 struct ibft_kobject *ibft_kobj = NULL;
635 struct ibft_nic *nic = (struct ibft_nic *)hdr;
636 struct pci_dev *pci_dev;
637 int rc = 0;
638
639 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
640 if (!ibft_kobj)
641 return -ENOMEM;
642
643 ibft_kobj->header = header;
644 ibft_kobj->hdr = hdr;
645
646 switch (hdr->id) {
647 case id_initiator:
648 rc = ibft_verify_hdr("initiator", hdr, id_initiator,
649 sizeof(*ibft_kobj->initiator));
650 if (rc)
651 break;
652
653 boot_kobj = iscsi_boot_create_initiator(boot_kset, hdr->index,
654 ibft_kobj,
655 ibft_attr_show_initiator,
656 ibft_check_initiator_for,
657 ibft_kobj_release);
658 if (!boot_kobj) {
659 rc = -ENOMEM;
660 goto free_ibft_obj;
661 }
662 break;
663 case id_nic:
664 rc = ibft_verify_hdr("ethernet", hdr, id_nic,
665 sizeof(*ibft_kobj->nic));
666 if (rc)
667 break;
668
669 boot_kobj = iscsi_boot_create_ethernet(boot_kset, hdr->index,
670 ibft_kobj,
671 ibft_attr_show_nic,
672 ibft_check_nic_for,
673 ibft_kobj_release);
674 if (!boot_kobj) {
675 rc = -ENOMEM;
676 goto free_ibft_obj;
677 }
678 break;
679 case id_target:
680 rc = ibft_verify_hdr("target", hdr, id_target,
681 sizeof(*ibft_kobj->tgt));
682 if (rc)
683 break;
684
685 boot_kobj = iscsi_boot_create_target(boot_kset, hdr->index,
686 ibft_kobj,
687 ibft_attr_show_target,
688 ibft_check_tgt_for,
689 ibft_kobj_release);
690 if (!boot_kobj) {
691 rc = -ENOMEM;
692 goto free_ibft_obj;
693 }
694 break;
695 case id_reserved:
696 case id_control:
697 case id_extensions:
698
699 rc = 1;
700 break;
701 default:
702 printk(KERN_ERR "iBFT has unknown structure type (%d). " \
703 "Report this bug to %.6s!\n", hdr->id,
704 header->header.oem_id);
705 rc = 1;
706 break;
707 }
708
709 if (rc) {
710
711 rc = 0;
712 goto free_ibft_obj;
713 }
714
715 if (hdr->id == id_nic) {
716
717
718
719
720
721
722 pci_dev = pci_get_domain_bus_and_slot(0,
723 (nic->pci_bdf & 0xff00) >> 8,
724 (nic->pci_bdf & 0xff));
725 if (pci_dev) {
726 rc = sysfs_create_link(&boot_kobj->kobj,
727 &pci_dev->dev.kobj, "device");
728 pci_dev_put(pci_dev);
729 }
730 }
731 return 0;
732
733free_ibft_obj:
734 kfree(ibft_kobj);
735 return rc;
736}
737
738
739
740
741
742
743static int __init ibft_register_kobjects(struct acpi_table_ibft *header)
744{
745 struct ibft_control *control = NULL;
746 struct iscsi_boot_kobj *boot_kobj;
747 struct ibft_kobject *ibft_kobj;
748 void *ptr, *end;
749 int rc = 0;
750 u16 offset;
751 u16 eot_offset;
752
753 control = (void *)header + sizeof(*header);
754 end = (void *)control + control->hdr.length;
755 eot_offset = (void *)header + header->header.length - (void *)control;
756 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
757 sizeof(*control));
758
759
760 rc |= ((control->hdr.index) ? -ENODEV : 0);
761 if (rc) {
762 printk(KERN_ERR "iBFT error: Control header is invalid!\n");
763 return rc;
764 }
765 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
766 offset = *(u16 *)ptr;
767 if (offset && offset < header->header.length &&
768 offset < eot_offset) {
769 rc = ibft_create_kobject(header,
770 (void *)header + offset);
771 if (rc)
772 break;
773 }
774 }
775 if (rc)
776 return rc;
777
778 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
779 if (!ibft_kobj)
780 return -ENOMEM;
781
782 ibft_kobj->header = header;
783 ibft_kobj->hdr = NULL;
784
785 boot_kobj = iscsi_boot_create_acpitbl(boot_kset, 0,
786 ibft_kobj,
787 ibft_attr_show_acpitbl,
788 ibft_check_acpitbl_for,
789 ibft_kobj_release);
790 if (!boot_kobj) {
791 kfree(ibft_kobj);
792 rc = -ENOMEM;
793 }
794
795 return rc;
796}
797
798static void ibft_unregister(void)
799{
800 struct iscsi_boot_kobj *boot_kobj, *tmp_kobj;
801 struct ibft_kobject *ibft_kobj;
802
803 list_for_each_entry_safe(boot_kobj, tmp_kobj,
804 &boot_kset->kobj_list, list) {
805 ibft_kobj = boot_kobj->data;
806 if (ibft_kobj->hdr && ibft_kobj->hdr->id == id_nic)
807 sysfs_remove_link(&boot_kobj->kobj, "device");
808 };
809}
810
811static void ibft_cleanup(void)
812{
813 if (boot_kset) {
814 ibft_unregister();
815 iscsi_boot_destroy_kset(boot_kset);
816 }
817}
818
819static void __exit ibft_exit(void)
820{
821 ibft_cleanup();
822}
823
824#ifdef CONFIG_ACPI
825static const struct {
826 char *sign;
827} ibft_signs[] = {
828
829
830
831
832 { ACPI_SIG_IBFT },
833 { "iBFT" },
834 { "BIFT" },
835};
836
837static void __init acpi_find_ibft_region(void)
838{
839 int i;
840 struct acpi_table_header *table = NULL;
841
842 if (acpi_disabled)
843 return;
844
845 for (i = 0; i < ARRAY_SIZE(ibft_signs) && !ibft_addr; i++) {
846 acpi_get_table(ibft_signs[i].sign, 0, &table);
847 ibft_addr = (struct acpi_table_ibft *)table;
848 }
849}
850#else
851static void __init acpi_find_ibft_region(void)
852{
853}
854#endif
855
856
857
858
859static int __init ibft_init(void)
860{
861 int rc = 0;
862
863
864
865
866
867
868 if (!ibft_addr)
869 acpi_find_ibft_region();
870
871 if (ibft_addr) {
872 pr_info("iBFT detected.\n");
873
874 rc = ibft_check_device();
875 if (rc)
876 return rc;
877
878 boot_kset = iscsi_boot_create_kset("ibft");
879 if (!boot_kset)
880 return -ENOMEM;
881
882
883 rc = ibft_register_kobjects(ibft_addr);
884 if (rc)
885 goto out_free;
886 } else
887 printk(KERN_INFO "No iBFT detected.\n");
888
889 return 0;
890
891out_free:
892 ibft_cleanup();
893 return rc;
894}
895
896module_init(ibft_init);
897module_exit(ibft_exit);
898
