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[deliverable/linux.git] / drivers / firmware / iscsi_ibft.c
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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 */
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
301static 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 */
309static 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
327static 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 */
9cf899d1
AB		 337static ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry,
338 struct ibft_attribute *attr,
339 char *buf)
138fe4e0
KR		 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
9cf899d1
AB		 379static ssize_t ibft_attr_show_nic(struct ibft_kobject *entry,
380 struct ibft_attribute *attr,
381 char *buf)
138fe4e0
KR		 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
9cf899d1
AB		 443static ssize_t ibft_attr_show_target(struct ibft_kobject *entry,
444 struct ibft_attribute *attr,
445 char *buf)
138fe4e0
KR		 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 */
511static 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
531static struct sysfs_ops ibft_attr_ops = {
532 .show = ibft_show_attribute,
533};
534
535static struct kobj_type ibft_ktype = {
536 .release = ibft_release,
537 .sysfs_ops = &ibft_attr_ops,
538};
539
540static struct kset *ibft_kset;
541
542static 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 */
570static 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);
649out:
650 return rc;
651out_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 */
661static 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;
bb8fb4e6 672 eot_offset = (void *)header + header->length - (void *)control;
138fe4e0
KR		 673 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control,
674 sizeof(*control));
675
676 /* iBFT table safety checking */
677 rc |= ((control->hdr.index) ? -ENODEV : 0);
678 if (rc) {
679 printk(KERN_ERR "iBFT error: Control header is invalid!\n");
680 return rc;
681 }
682 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) {
683 offset = *(u16 *)ptr;
684 if (offset && offset < header->length && offset < eot_offset) {
685 rc = ibft_create_kobject(header,
686 (void *)header + offset,
687 list);
688 if (rc)
689 break;
690 }
691 }
692
693 return rc;
694}
695
696static void ibft_unregister(struct list_head *attr_list,
697 struct list_head *kobj_list)
698{
699 struct ibft_kobject *data = NULL, *n;
700 struct ibft_attribute *attr = NULL, *m;
701
702 list_for_each_entry_safe(attr, m, attr_list, node) {
703 sysfs_remove_file(attr->kobj, &attr->attr);
704 list_del(&attr->node);
705 kfree(attr);
706 };
707 list_del_init(attr_list);
708
709 list_for_each_entry_safe(data, n, kobj_list, node) {
710 list_del(&data->node);
711 if (data->hdr->id == id_nic)
712 sysfs_remove_link(&data->kobj, "device");
713 kobject_put(&data->kobj);
714 };
715 list_del_init(kobj_list);
716}
717
718static int __init ibft_create_attribute(struct ibft_kobject *kobj_data,
719 int type,
720 const char *name,
721 ssize_t (*show)(struct ibft_kobject *,
722 struct ibft_attribute*,
723 char *buf),
724 struct list_head *list)
725{
726 struct ibft_attribute *attr = NULL;
727 struct ibft_hdr *hdr = kobj_data->hdr;
728
729 attr = kmalloc(sizeof(*attr), GFP_KERNEL);
730 if (!attr)
731 return -ENOMEM;
732
733 attr->attr.name = name;
734 attr->attr.mode = S_IRUSR;
138fe4e0
KR		 735
736 attr->hdr = hdr;
737 attr->show = show;
738 attr->kobj = &kobj_data->kobj;
739 attr->type = type;
740
741 list_add_tail(&attr->node, list);
742
743 return 0;
744}
745
746/*
747 * Helper routiners to check to determine if the entry is valid
748 * in the proper iBFT structure.
749 */
750static int __init ibft_check_nic_for(struct ibft_nic *nic, int entry)
751{
752 int rc = 0;
753
754 switch (entry) {
755 case ibft_eth_index:
756 case ibft_eth_flags:
757 rc = 1;
758 break;
759 case ibft_eth_ip_addr:
760 if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
761 rc = 1;
762 break;
763 case ibft_eth_subnet_mask:
764 if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
765 rc = 1;
766 break;
767 case ibft_eth_origin:
768 rc = 1;
769 break;
770 case ibft_eth_gateway:
771 if (memcmp(nic->gateway, nulls, sizeof(nic->gateway)))
772 rc = 1;
773 break;
774 case ibft_eth_primary_dns:
775 if (memcmp(nic->primary_dns, nulls,
776 sizeof(nic->primary_dns)))
777 rc = 1;
778 break;
779 case ibft_eth_secondary_dns:
780 if (memcmp(nic->secondary_dns, nulls,
781 sizeof(nic->secondary_dns)))
782 rc = 1;
783 break;
784 case ibft_eth_dhcp:
785 if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp)))
786 rc = 1;
787 break;
788 case ibft_eth_vlan:
789 case ibft_eth_mac:
790 rc = 1;
791 break;
792 case ibft_eth_hostname:
793 if (nic->hostname_off)
794 rc = 1;
795 break;
796 default:
797 break;
798 }
799
800 return rc;
801}
802
803static int __init ibft_check_tgt_for(struct ibft_tgt *tgt, int entry)
804{
805 int rc = 0;
806
807 switch (entry) {
808 case ibft_tgt_index:
809 case ibft_tgt_flags:
810 case ibft_tgt_ip_addr:
811 case ibft_tgt_port:
812 case ibft_tgt_lun:
813 case ibft_tgt_nic_assoc:
814 case ibft_tgt_chap_type:
815 rc = 1;
816 case ibft_tgt_name:
817 if (tgt->tgt_name_len)
818 rc = 1;
819 break;
820 case ibft_tgt_chap_name:
821 case ibft_tgt_chap_secret:
822 if (tgt->chap_name_len)
823 rc = 1;
824 break;
825 case ibft_tgt_rev_chap_name:
826 case ibft_tgt_rev_chap_secret:
827 if (tgt->rev_chap_name_len)
828 rc = 1;
829 break;
830 default:
831 break;
832 }
833
834 return rc;
835}
836
837static int __init ibft_check_initiator_for(struct ibft_initiator *init,
838 int entry)
839{
840 int rc = 0;
841
842 switch (entry) {
843 case ibft_init_index:
844 case ibft_init_flags:
845 rc = 1;
846 break;
847 case ibft_init_isns_server:
848 if (memcmp(init->isns_server, nulls,
849 sizeof(init->isns_server)))
850 rc = 1;
851 break;
852 case ibft_init_slp_server:
853 if (memcmp(init->slp_server, nulls,
854 sizeof(init->slp_server)))
855 rc = 1;
856 break;
857 case ibft_init_pri_radius_server:
858 if (memcmp(init->pri_radius_server, nulls,
859 sizeof(init->pri_radius_server)))
860 rc = 1;
861 break;
862 case ibft_init_sec_radius_server:
863 if (memcmp(init->sec_radius_server, nulls,
864 sizeof(init->sec_radius_server)))
865 rc = 1;
866 break;
867 case ibft_init_initiator_name:
868 if (init->initiator_name_len)
869 rc = 1;
870 break;
871 default:
872 break;
873 }
874
875 return rc;
876}
877
878/*
879 * Register the attributes for all of the kobjects.
880 */
881static int __init ibft_register_attributes(struct list_head *kobject_list,
882 struct list_head *attr_list)
883{
884 int rc = 0, i = 0;
885 struct ibft_kobject *data = NULL;
886 struct ibft_attribute *attr = NULL, *m;
887
888 list_for_each_entry(data, kobject_list, node) {
889 switch (data->hdr->id) {
890 case id_nic:
891 for (i = 0; i < ibft_eth_end_marker && !rc; i++)
892 if (ibft_check_nic_for(data->nic, i))
893 rc = ibft_create_attribute(data, i,
894 ibft_eth_properties[i],
895 ibft_attr_show_nic, attr_list);
896 break;
897 case id_target:
898 for (i = 0; i < ibft_tgt_end_marker && !rc; i++)
899 if (ibft_check_tgt_for(data->tgt, i))
900 rc = ibft_create_attribute(data, i,
901 ibft_tgt_properties[i],
902 ibft_attr_show_target,
903 attr_list);
904 break;
905 case id_initiator:
906 for (i = 0; i < ibft_init_end_marker && !rc; i++)
907 if (ibft_check_initiator_for(
908 data->initiator, i))
909 rc = ibft_create_attribute(data, i,
910 ibft_initiator_properties[i],
911 ibft_attr_show_initiator,
912 attr_list);
913 break;
914 default:
915 break;
916 }
917 if (rc)
918 break;
919 }
920 list_for_each_entry_safe(attr, m, attr_list, node) {
921 rc = sysfs_create_file(attr->kobj, &attr->attr);
922 if (rc) {
923 list_del(&attr->node);
924 kfree(attr);
925 break;
926 }
927 }
928
929 return rc;
930}
931
932/*
933 * ibft_init() - creates sysfs tree entries for the iBFT data.
934 */
935static int __init ibft_init(void)
936{
937 int rc = 0;
938
939 ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj);
940 if (!ibft_kset)
941 return -ENOMEM;
942
943 if (ibft_addr) {
944 printk(KERN_INFO "iBFT detected at 0x%lx.\n",
945 virt_to_phys((void *)ibft_addr));
946
947 rc = ibft_check_device();
948 if (rc)
949 goto out_firmware_unregister;
950
951 /* Scan the IBFT for data and register the kobjects. */
952 rc = ibft_register_kobjects(ibft_addr, &ibft_kobject_list);
953 if (rc)
954 goto out_free;
955
956 /* Register the attributes */
957 rc = ibft_register_attributes(&ibft_kobject_list,
958 &ibft_attr_list);
959 if (rc)
960 goto out_free;
961 } else
962 printk(KERN_INFO "No iBFT detected.\n");
963
964 return 0;
965
966out_free:
967 ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
968out_firmware_unregister:
969 kset_unregister(ibft_kset);
970 return rc;
971}
972
973static void __exit ibft_exit(void)
974{
975 ibft_unregister(&ibft_attr_list, &ibft_kobject_list);
976 kset_unregister(ibft_kset);
977}
978
979module_init(ibft_init);
980module_exit(ibft_exit);
Linux kernel - Deliverables
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