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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
85MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \
86Konrad Rzeszutek <ketuzsezr@darnok.org>");
87MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information");
88MODULE_LICENSE("GPL");
89MODULE_VERSION(IBFT_ISCSI_VERSION);
90
91struct ibft_hdr {
92 u8 id;
93 u8 version;
94 u16 length;
95 u8 index;
96 u8 flags;
97} __attribute__((__packed__));
98
99struct 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
109struct 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
119struct 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
135struct 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*/
158enum 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 */
172static 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*/
178enum 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
195static 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
200enum 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
216static 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
221enum 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
232static 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
240struct 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
252struct 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
269static LIST_HEAD(ibft_attr_list);
270static LIST_HEAD(ibft_kobject_list);
271
272static const char nulls[16];
273
274/*
275 * Helper functions to parse data properly.
276 */
277static 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 */
5b095d98 293 str += sprintf(str, "%pI6", ip);
138fe4e0
KR		 294 }
295 str += sprintf(str, "\n");
296 return str - buf;
297}
298
299static ssize_t sprintf_string(char *str, int len, char *buf)
300{
301 return sprintf(str, "%.*s\n", len, buf);
302}
303
304/*
305 * Helper function to verify the IBFT header.
306 */
307static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length)
308{
309 if (hdr->id != id) {
310 printk(KERN_ERR "iBFT error: We expected the " \
311 "field header.id to have %d but " \
312 "found %d instead!\n", id, hdr->id);
313 return -ENODEV;
314 }
315 if (hdr->length != length) {
316 printk(KERN_ERR "iBFT error: We expected the " \
317 "field header.length to have %d but " \
318 "found %d instead!\n", length, hdr->length);
319 return -ENODEV;
320 }
321
322 return 0;
323}
324
325static void ibft_release(struct kobject *kobj)
326{
327 struct ibft_kobject *ibft =
328 container_of(kobj, struct ibft_kobject, kobj);
329 kfree(ibft);
330}
331
332/*
333 * Routines for parsing the iBFT data to be human readable.
334 */
9cf899d1
AB		 335static ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
336 struct ibft_attribute *attr,
337 char *buf)
138fe4e0
KR		 338{
339 struct ibft_initiator *initiator = entry->initiator;
340 void *ibft_loc = entry->header;
341 char *str = buf;
342
343 if (!initiator)
344 return 0;
345
346 switch (attr->type) {
347 case ibft_init_index:
348 str += sprintf(str, "%d\n", initiator->hdr.index);
349 break;
350 case ibft_init_flags:
351 str += sprintf(str, "%d\n", initiator->hdr.flags);
352 break;
353 case ibft_init_isns_server:
354 str += sprintf_ipaddr(str, initiator->isns_server);
355 break;
356 case ibft_init_slp_server:
357 str += sprintf_ipaddr(str, initiator->slp_server);
358 break;
359 case ibft_init_pri_radius_server:
360 str += sprintf_ipaddr(str, initiator->pri_radius_server);
361 break;
362 case ibft_init_sec_radius_server:
363 str += sprintf_ipaddr(str, initiator->sec_radius_server);
364 break;
365 case ibft_init_initiator_name:
366 str += sprintf_string(str, initiator->initiator_name_len,
367 (char *)ibft_loc +
368 initiator->initiator_name_off);
369 break;
370 default:
371 break;
372 }
373
374 return str - buf;
375}
376
9cf899d1
AB		 377static ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
378 struct ibft_attribute *attr,
379 char *buf)
138fe4e0
KR		 380{
381 struct ibft_nic *nic = entry->nic;
382 void *ibft_loc = entry->header;
383 char *str = buf;
384 char *mac;
385 int val;
386
387 if (!nic)
388 return 0;
389
390 switch (attr->type) {
391 case ibft_eth_index:
392 str += sprintf(str, "%d\n", nic->hdr.index);
393 break;
394 case ibft_eth_flags:
395 str += sprintf(str, "%d\n", nic->hdr.flags);
396 break;
397 case ibft_eth_ip_addr:
398 str += sprintf_ipaddr(str, nic->ip_addr);
399 break;
400 case ibft_eth_subnet_mask:
401 val = ~((1 << (32-nic->subnet_mask_prefix))-1);
402 str += sprintf(str, NIPQUAD_FMT,
403 (u8)(val >> 24), (u8)(val >> 16),
404 (u8)(val >> 8), (u8)(val));
405 break;
406 case ibft_eth_origin:
407 str += sprintf(str, "%d\n", nic->origin);
408 break;
409 case ibft_eth_gateway:
410 str += sprintf_ipaddr(str, nic->gateway);
411 break;
412 case ibft_eth_primary_dns:
413 str += sprintf_ipaddr(str, nic->primary_dns);
414 break;
415 case ibft_eth_secondary_dns:
416 str += sprintf_ipaddr(str, nic->secondary_dns);
417 break;
418 case ibft_eth_dhcp:
419 str += sprintf_ipaddr(str, nic->dhcp);
420 break;
421 case ibft_eth_vlan:
422 str += sprintf(str, "%d\n", nic->vlan);
423 break;
424 case ibft_eth_mac:
425 mac = nic->mac;
426 str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n",
427 (u8)mac[0], (u8)mac[1], (u8)mac[2],
428 (u8)mac[3], (u8)mac[4], (u8)mac[5]);
429 break;
430 case ibft_eth_hostname:
431 str += sprintf_string(str, nic->hostname_len,
432 (char *)ibft_loc + nic->hostname_off);
433 break;
434 default:
435 break;
436 }
437
438 return str - buf;
439};
440
9cf899d1
AB		 441static ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
442 struct ibft_attribute *attr,
443 char *buf)
138fe4e0
KR		 444{
445 struct ibft_tgt *tgt = entry->tgt;
446 void *ibft_loc = entry->header;
447 char *str = buf;
448 int i;
449
450 if (!tgt)
451 return 0;
452
453 switch (attr->type) {
454 case ibft_tgt_index:
455 str += sprintf(str, "%d\n", tgt->hdr.index);
456 break;
457 case ibft_tgt_flags:
458 str += sprintf(str, "%d\n", tgt->hdr.flags);
459 break;
460 case ibft_tgt_ip_addr:
461 str += sprintf_ipaddr(str, tgt->ip_addr);
462 break;
463 case ibft_tgt_port:
464 str += sprintf(str, "%d\n", tgt->port);
465 break;
466 case ibft_tgt_lun:
467 for (i = 0; i < 8; i++)
468 str += sprintf(str, "%x", (u8)tgt->lun[i]);
469 str += sprintf(str, "\n");
470 break;
471 case ibft_tgt_nic_assoc:
472 str += sprintf(str, "%d\n", tgt->nic_assoc);
473 break;
474 case ibft_tgt_chap_type:
475 str += sprintf(str, "%d\n", tgt->chap_type);
476 break;
477 case ibft_tgt_name:
478 str += sprintf_string(str, tgt->tgt_name_len,
479 (char *)ibft_loc + tgt->tgt_name_off);
480 break;
481 case ibft_tgt_chap_name:
482 str += sprintf_string(str, tgt->chap_name_len,
483 (char *)ibft_loc + tgt->chap_name_off);
484 break;
485 case ibft_tgt_chap_secret:
486 str += sprintf_string(str, tgt->chap_secret_len,
487 (char *)ibft_loc + tgt->chap_secret_off);
488 break;
489 case ibft_tgt_rev_chap_name:
490 str += sprintf_string(str, tgt->rev_chap_name_len,
491 (char *)ibft_loc +
492 tgt->rev_chap_name_off);
493 break;
494 case ibft_tgt_rev_chap_secret:
495 str += sprintf_string(str, tgt->rev_chap_secret_len,
496 (char *)ibft_loc +
497 tgt->rev_chap_secret_off);
498 break;
499 default:
500 break;
501 }
502
503 return str - buf;
504}
505
506/*
507 * The routine called for all sysfs attributes.
508 */
509static ssize_t ibft_show_attribute(struct kobject *kobj,
510 struct attribute *attr,
511 char *buf)
512{
513 struct ibft_kobject *dev =
514 container_of(kobj, struct ibft_kobject, kobj);
515 struct ibft_attribute *ibft_attr =
516 container_of(attr, struct ibft_attribute, attr);
517 ssize_t ret = -EIO;
518 char *str = buf;
519
520 if (!capable(CAP_SYS_ADMIN))
521 return -EACCES;
522
523 if (ibft_attr->show)
524 ret = ibft_attr->show(dev, ibft_attr, str);
525
526 return ret;
527}
528
529static struct sysfs_ops ibft_attr_ops = {
530 .show = ibft_show_attribute,
531};
532
533static struct kobj_type ibft_ktype = {
534 .release = ibft_release,
535 .sysfs_ops = &ibft_attr_ops,
536};
537
538static struct kset *ibft_kset;
539
540static int __init ibft_check_device(void)
541{
542 int len;
543 u8 *pos;
544 u8 csum = 0;
545
546 len = ibft_addr->length;
547
548 /* Sanity checking of iBFT. */
549 if (ibft_addr->revision != 1) {
550 printk(KERN_ERR "iBFT module supports only revision 1, " \
551 "while this is %d.\n", ibft_addr->revision);
552 return -ENOENT;
553 }
554 for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++)
555 csum += *pos;
556
557 if (csum) {
558 printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum);
559 return -ENOENT;
560 }
561
562 return 0;
563}
564
565/*
566 * Helper function for ibft_register_kobjects.
567 */
568static int __init ibft_create_kobject(struct ibft_table_header *header,
569 struct ibft_hdr *hdr,
570 struct list_head *list)
571{
572 struct ibft_kobject *ibft_kobj = NULL;
573 struct ibft_nic *nic = (struct ibft_nic *)hdr;
574 struct pci_dev *pci_dev;
575 int rc = 0;
576
577 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL);
578 if (!ibft_kobj)
579 return -ENOMEM;
580
581 ibft_kobj->header = header;
582 ibft_kobj->hdr = hdr;
583
584 switch (hdr->id) {
585 case id_initiator:
586 rc = ibft_verify_hdr("initiator", hdr, id_initiator,
587 sizeof(*ibft_kobj->initiator));
588 break;
589 case id_nic:
590 rc = ibft_verify_hdr("ethernet", hdr, id_nic,
591 sizeof(*ibft_kobj->nic));
592 break;
593 case id_target:
594 rc = ibft_verify_hdr("target", hdr, id_target,
595 sizeof(*ibft_kobj->tgt));
596 break;
597 case id_reserved:
598 case id_control:
599 case id_extensions:
600 /* Fields which we don't support. Ignore them */
601 rc = 1;
602 break;
603 default:
604 printk(KERN_ERR "iBFT has unknown structure type (%d). " \
605 "Report this bug to %.6s!\n", hdr->id,
606 header->oem_id);
607 rc = 1;
608 break;
609 }
610
611 if (rc) {
612 /* Skip adding this kobject, but exit with non-fatal error. */
613 kfree(ibft_kobj);
614 goto out_invalid_struct;
615 }
616
617 ibft_kobj->kobj.kset = ibft_kset;
618
619 rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype,
620 NULL, ibft_id_names[hdr->id], hdr->index);
621
622 if (rc) {
623 kfree(ibft_kobj);
624 goto out;
625 }
626
627 kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD);
628
629 if (hdr->id == id_nic) {
630 /*
631 * We don't search for the device in other domains than
632 * zero. This is because on x86 platforms the BIOS
633 * executes only devices which are in domain 0. Furthermore, the
634 * iBFT spec doesn't have a domain id field :-(
635 */
636 pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8,
637 (nic->pci_bdf & 0xff));
638 if (pci_dev) {
639 rc = sysfs_create_link(&ibft_kobj->kobj,
640 &pci_dev->dev.kobj, "device");
641 pci_dev_put(pci_dev);
642 }
643 }
644
645 /* Nothing broke so lets add it to the list. */
646 list_add_tail(&ibft_kobj->node, list);
647out:
648 return rc;
649out_invalid_struct:
650 /* Unsupported structs are skipped. */
651 return 0;
652}
653
654/*
655 * Scan the IBFT table structure for the NIC and Target fields. When
656 * found add them on the passed-in list. We do not support the other
657 * fields at this point, so they are skipped.
658 */
659static int __init ibft_register_kobjects(struct ibft_table_header *header,
660 struct list_head *list)
661{
662 struct ibft_control *control = NULL;
663 void *ptr, *end;
664 int rc = 0;
665 u16 offset;
666 u16 eot_offset;
667
668 control = (void *)header + sizeof(*header);
669 end = (void *)control + control->hdr.length;
bb8fb4e6 670 eot_offset = (void *)header + header->length - (void *)control;
138fe4e0
KR		 671 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
672 sizeof(*control));
673
674 /* iBFT table safety checking */
675 rc |= ((control->hdr.index) ? -ENODEV : 0);
676 if (rc) {
677 printk(KERN_ERR "iBFT error: Control header is invalid!\n");
678 return rc;
679 }
680 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
681 offset = *(u16 *)ptr;
682 if (offset && offset < header->length && offset < eot_offset) {
683 rc = ibft_create_kobject(header,
684 (void *)header + offset,
685 list);
686 if (rc)
687 break;
688 }
689 }
690
691 return rc;
692}
693
694static void ibft_unregister(struct list_head *attr_list,
695 struct list_head *kobj_list)
696{
697 struct ibft_kobject *data = NULL, *n;
698 struct ibft_attribute *attr = NULL, *m;
699
700 list_for_each_entry_safe(attr, m, attr_list, node) {
701 sysfs_remove_file(attr->kobj, &attr->attr);
702 list_del(&attr->node);
703 kfree(attr);
704 };
705 list_del_init(attr_list);
706
707 list_for_each_entry_safe(data, n, kobj_list, node) {
708 list_del(&data->node);
709 if (data->hdr->id == id_nic)
710 sysfs_remove_link(&data->kobj, "device");
711 kobject_put(&data->kobj);
712 };
713 list_del_init(kobj_list);
714}
715
716static int __init ibft_create_attribute(struct ibft_kobject *kobj_data,
717 int type,
718 const char *name,
719 ssize_t (*show)(struct ibft_kobject *,
720 struct ibft_attribute*,
721 char *buf),
722 struct list_head *list)
723{
724 struct ibft_attribute *attr = NULL;
725 struct ibft_hdr *hdr = kobj_data->hdr;
726
727 attr = kmalloc(sizeof(*attr), GFP_KERNEL);
728 if (!attr)
729 return -ENOMEM;
730
731 attr->attr.name = name;
732 attr->attr.mode = S_IRUSR;
138fe4e0
KR		 733
734 attr->hdr = hdr;
735 attr->show = show;
736 attr->kobj = &kobj_data->kobj;
737 attr->type = type;
738
739 list_add_tail(&attr->node, list);
740
741 return 0;
742}
743
744/*
745 * Helper routiners to check to determine if the entry is valid
746 * in the proper iBFT structure.
747 */
748static int __init ibft_check_nic_for(struct ibft_nic *nic, int entry)
749{
750 int rc = 0;
751
752 switch (entry) {
753 case ibft_eth_index:
754 case ibft_eth_flags:
755 rc = 1;
756 break;
757 case ibft_eth_ip_addr:
758 if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
759 rc = 1;
760 break;
761 case ibft_eth_subnet_mask:
762 if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
763 rc = 1;
764 break;
765 case ibft_eth_origin:
766 rc = 1;
767 break;
768 case ibft_eth_gateway:
769 if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
770 rc = 1;
771 break;
772 case ibft_eth_primary_dns:
773 if (memcmp(nic->primary_dns, nulls,
774 sizeof(nic->primary_dns)))
775 rc = 1;
776 break;
777 case ibft_eth_secondary_dns:
778 if (memcmp(nic->secondary_dns, nulls,
779 sizeof(nic->secondary_dns)))
780 rc = 1;
781 break;
782 case ibft_eth_dhcp:
783 if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
784 rc = 1;
785 break;
786 case ibft_eth_vlan:
787 case ibft_eth_mac:
788 rc = 1;
789 break;
790 case ibft_eth_hostname:
791 if (nic->hostname_off)
792 rc = 1;
793 break;
794 default:
795 break;
796 }
797
798 return rc;
799}
800
801static int __init ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
802{
803 int rc = 0;
804
805 switch (entry) {
806 case ibft_tgt_index:
807 case ibft_tgt_flags:
808 case ibft_tgt_ip_addr:
809 case ibft_tgt_port:
810 case ibft_tgt_lun:
811 case ibft_tgt_nic_assoc:
812 case ibft_tgt_chap_type:
813 rc = 1;
814 case ibft_tgt_name:
815 if (tgt->tgt_name_len)
816 rc = 1;
817 break;
818 case ibft_tgt_chap_name:
819 case ibft_tgt_chap_secret:
820 if (tgt->chap_name_len)
821 rc = 1;
822 break;
823 case ibft_tgt_rev_chap_name:
824 case ibft_tgt_rev_chap_secret:
825 if (tgt->rev_chap_name_len)
826 rc = 1;
827 break;
828 default:
829 break;
830 }
831
832 return rc;
833}
834
835static int __init ibft_check_initiator_for(struct ibft_initiator *init,
836 int entry)
837{
838 int rc = 0;
839
840 switch (entry) {
841 case ibft_init_index:
842 case ibft_init_flags:
843 rc = 1;
844 break;
845 case ibft_init_isns_server:
846 if (memcmp(init->isns_server, nulls,
847 sizeof(init->isns_server)))
848 rc = 1;
849 break;
850 case ibft_init_slp_server:
851 if (memcmp(init->slp_server, nulls,
852 sizeof(init->slp_server)))
853 rc = 1;
854 break;
855 case ibft_init_pri_radius_server:
856 if (memcmp(init->pri_radius_server, nulls,
857 sizeof(init->pri_radius_server)))
858 rc = 1;
859 break;
860 case ibft_init_sec_radius_server:
861 if (memcmp(init->sec_radius_server, nulls,
862 sizeof(init->sec_radius_server)))
863 rc = 1;
864 break;
865 case ibft_init_initiator_name:
866 if (init->initiator_name_len)
867 rc = 1;
868 break;
869 default:
870 break;
871 }
872
873 return rc;
874}
875
876/*
877 * Register the attributes for all of the kobjects.
878 */
879static int __init ibft_register_attributes(struct list_head *kobject_list,
880 struct list_head *attr_list)
881{
882 int rc = 0, i = 0;
883 struct ibft_kobject *data = NULL;
884 struct ibft_attribute *attr = NULL, *m;
885
886 list_for_each_entry(data, kobject_list, node) {
887 switch (data->hdr->id) {
888 case id_nic:
889 for (i = 0; i < ibft_eth_end_marker && !rc; i++)
890 if (ibft_check_nic_for(data->nic, i))
891 rc = ibft_create_attribute(data, i,
892 ibft_eth_properties[i],
893 ibft_attr_show_nic, attr_list);
894 break;
895 case id_target:
896 for (i = 0; i < ibft_tgt_end_marker && !rc; i++)
897 if (ibft_check_tgt_for(data->tgt, i))
898 rc = ibft_create_attribute(data, i,
899 ibft_tgt_properties[i],
900 ibft_attr_show_target,
901 attr_list);
902 break;
903 case id_initiator:
904 for (i = 0; i < ibft_init_end_marker && !rc; i++)
905 if (ibft_check_initiator_for(
906 data->initiator, i))
907 rc = ibft_create_attribute(data, i,
908 ibft_initiator_properties[i],
909 ibft_attr_show_initiator,
910 attr_list);
911 break;
912 default:
913 break;
914 }
915 if (rc)
916 break;
917 }
918 list_for_each_entry_safe(attr, m, attr_list, node) {
919 rc = sysfs_create_file(attr->kobj, &attr->attr);
920 if (rc) {
921 list_del(&attr->node);
922 kfree(attr);
923 break;
924 }
925 }
926
927 return rc;
928}
929
930/*
931 * ibft_init() - creates sysfs tree entries for the iBFT data.
932 */
933static int __init ibft_init(void)
934{
935 int rc = 0;
936
937 ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj);
938 if (!ibft_kset)
939 return -ENOMEM;
940
941 if (ibft_addr) {
942 printk(KERN_INFO "iBFT detected at 0x%lx.\n",
943 virt_to_phys((void *)ibft_addr));
944
945 rc = ibft_check_device();
946 if (rc)
947 goto out_firmware_unregister;
948
949 /* Scan the IBFT for data and register the kobjects. */
950 rc = ibft_register_kobjects(ibft_addr, &ibft_kobject_list);
951 if (rc)
952 goto out_free;
953
954 /* Register the attributes */
955 rc = ibft_register_attributes(&ibft_kobject_list,
956 &ibft_attr_list);
957 if (rc)
958 goto out_free;
959 } else
960 printk(KERN_INFO "No iBFT detected.\n");
961
962 return 0;
963
964out_free:
965 ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
966out_firmware_unregister:
967 kset_unregister(ibft_kset);
968 return rc;
969}
970
971static void __exit ibft_exit(void)
972{
973 ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
974 kset_unregister(ibft_kset);
975}
976
977module_init(ibft_init);
978module_exit(ibft_exit);
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