1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright 2007-2010 Red Hat, Inc. |
4 | * by Peter Jones <pjones@redhat.com> |
5 | * Copyright 2008 IBM, Inc. |
6 | * by Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
7 | * Copyright 2008 |
8 | * by Konrad Rzeszutek <ketuzsezr@darnok.org> |
9 | * |
10 | * This code exposes the iSCSI Boot Format Table to userland via sysfs. |
11 | * |
12 | * Changelog: |
13 | * |
14 | * 06 Jan 2010 - Peter Jones <pjones@redhat.com> |
15 | * New changelog entries are in the git log from now on. Not here. |
16 | * |
17 | * 14 Mar 2008 - Konrad Rzeszutek <ketuzsezr@darnok.org> |
18 | * Updated comments and copyrights. (v0.4.9) |
19 | * |
20 | * 11 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
21 | * Converted to using ibft_addr. (v0.4.8) |
22 | * |
23 | * 8 Feb 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
24 | * Combined two functions in one: reserve_ibft_region. (v0.4.7) |
25 | * |
26 | * 30 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
27 | * Added logic to handle IPv6 addresses. (v0.4.6) |
28 | * |
29 | * 25 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
30 | * Added logic to handle badly not-to-spec iBFT. (v0.4.5) |
31 | * |
32 | * 4 Jan 2008 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
33 | * Added __init to function declarations. (v0.4.4) |
34 | * |
35 | * 21 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
36 | * Updated kobject registration, combined unregister functions in one |
37 | * and code and style cleanup. (v0.4.3) |
38 | * |
39 | * 5 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
40 | * Added end-markers to enums and re-organized kobject registration. (v0.4.2) |
41 | * |
42 | * 4 Dec 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
43 | * Created 'device' sysfs link to the NIC and style cleanup. (v0.4.1) |
44 | * |
45 | * 28 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
46 | * Added sysfs-ibft documentation, moved 'find_ibft' function to |
47 | * in its own file and added text attributes for every struct field. (v0.4) |
48 | * |
49 | * 21 Nov 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
50 | * Added text attributes emulating OpenFirmware /proc/device-tree naming. |
51 | * Removed binary /sysfs interface (v0.3) |
52 | * |
53 | * 29 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
54 | * Added functionality in setup.c to reserve iBFT region. (v0.2) |
55 | * |
56 | * 27 Aug 2007 - Konrad Rzeszutek <konradr@linux.vnet.ibm.com> |
57 | * First version exposing iBFT data via a binary /sysfs. (v0.1) |
58 | */ |
59 | |
60 | |
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 | static struct acpi_table_ibft *ibft_addr; |
88 | |
89 | struct ibft_hdr { |
90 | u8 id; |
91 | u8 version; |
92 | u16 length; |
93 | u8 index; |
94 | u8 flags; |
95 | } __attribute__((__packed__)); |
96 | |
97 | struct ibft_control { |
98 | struct ibft_hdr hdr; |
99 | u16 extensions; |
100 | u16 initiator_off; |
101 | u16 nic0_off; |
102 | u16 tgt0_off; |
103 | u16 nic1_off; |
104 | u16 tgt1_off; |
105 | u16 expansion[]; |
106 | } __attribute__((__packed__)); |
107 | |
108 | struct ibft_initiator { |
109 | struct ibft_hdr hdr; |
110 | char isns_server[16]; |
111 | char slp_server[16]; |
112 | char pri_radius_server[16]; |
113 | char sec_radius_server[16]; |
114 | u16 initiator_name_len; |
115 | u16 initiator_name_off; |
116 | } __attribute__((__packed__)); |
117 | |
118 | struct ibft_nic { |
119 | struct ibft_hdr hdr; |
120 | char ip_addr[16]; |
121 | u8 subnet_mask_prefix; |
122 | u8 origin; |
123 | char gateway[16]; |
124 | char primary_dns[16]; |
125 | char secondary_dns[16]; |
126 | char dhcp[16]; |
127 | u16 vlan; |
128 | char mac[6]; |
129 | u16 pci_bdf; |
130 | u16 hostname_len; |
131 | u16 hostname_off; |
132 | } __attribute__((__packed__)); |
133 | |
134 | struct ibft_tgt { |
135 | struct ibft_hdr hdr; |
136 | char ip_addr[16]; |
137 | u16 port; |
138 | char lun[8]; |
139 | u8 chap_type; |
140 | u8 nic_assoc; |
141 | u16 tgt_name_len; |
142 | u16 tgt_name_off; |
143 | u16 chap_name_len; |
144 | u16 chap_name_off; |
145 | u16 chap_secret_len; |
146 | u16 chap_secret_off; |
147 | u16 rev_chap_name_len; |
148 | u16 rev_chap_name_off; |
149 | u16 rev_chap_secret_len; |
150 | u16 rev_chap_secret_off; |
151 | } __attribute__((__packed__)); |
152 | |
153 | /* |
154 | * The kobject different types and its names. |
155 | * |
156 | */ |
157 | enum ibft_id { |
158 | id_reserved = 0, /* We don't support. */ |
159 | id_control = 1, /* Should show up only once and is not exported. */ |
160 | id_initiator = 2, |
161 | id_nic = 3, |
162 | id_target = 4, |
163 | id_extensions = 5, /* We don't support. */ |
164 | id_end_marker, |
165 | }; |
166 | |
167 | /* |
168 | * The kobject and attribute structures. |
169 | */ |
170 | |
171 | struct ibft_kobject { |
172 | struct acpi_table_ibft *; |
173 | union { |
174 | struct ibft_initiator *initiator; |
175 | struct ibft_nic *nic; |
176 | struct ibft_tgt *tgt; |
177 | struct ibft_hdr *hdr; |
178 | }; |
179 | }; |
180 | |
181 | static struct iscsi_boot_kset *boot_kset; |
182 | |
183 | /* fully null address */ |
184 | static const char nulls[16]; |
185 | |
186 | /* IPv4-mapped IPv6 ::ffff:0.0.0.0 */ |
187 | static const char mapped_nulls[16] = { 0x00, 0x00, 0x00, 0x00, |
188 | 0x00, 0x00, 0x00, 0x00, |
189 | 0x00, 0x00, 0xff, 0xff, |
190 | 0x00, 0x00, 0x00, 0x00 }; |
191 | |
192 | static int address_not_null(u8 *ip) |
193 | { |
194 | return (memcmp(p: ip, q: nulls, size: 16) && memcmp(p: ip, q: mapped_nulls, size: 16)); |
195 | } |
196 | |
197 | /* |
198 | * Helper functions to parse data properly. |
199 | */ |
200 | static ssize_t sprintf_ipaddr(char *buf, u8 *ip) |
201 | { |
202 | char *str = buf; |
203 | |
204 | if (ip[0] == 0 && ip[1] == 0 && ip[2] == 0 && ip[3] == 0 && |
205 | ip[4] == 0 && ip[5] == 0 && ip[6] == 0 && ip[7] == 0 && |
206 | ip[8] == 0 && ip[9] == 0 && ip[10] == 0xff && ip[11] == 0xff) { |
207 | /* |
208 | * IPV4 |
209 | */ |
210 | str += sprintf(buf, fmt: "%pI4" , ip + 12); |
211 | } else { |
212 | /* |
213 | * IPv6 |
214 | */ |
215 | str += sprintf(buf: str, fmt: "%pI6" , ip); |
216 | } |
217 | str += sprintf(buf: str, fmt: "\n" ); |
218 | return str - buf; |
219 | } |
220 | |
221 | static ssize_t sprintf_string(char *str, int len, char *buf) |
222 | { |
223 | return sprintf(buf: str, fmt: "%.*s\n" , len, buf); |
224 | } |
225 | |
226 | /* |
227 | * Helper function to verify the IBFT header. |
228 | */ |
229 | static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length) |
230 | { |
231 | if (hdr->id != id) { |
232 | printk(KERN_ERR "iBFT error: We expected the %s " \ |
233 | "field header.id to have %d but " \ |
234 | "found %d instead!\n" , t, id, hdr->id); |
235 | return -ENODEV; |
236 | } |
237 | if (length && hdr->length != length) { |
238 | printk(KERN_ERR "iBFT error: We expected the %s " \ |
239 | "field header.length to have %d but " \ |
240 | "found %d instead!\n" , t, length, hdr->length); |
241 | return -ENODEV; |
242 | } |
243 | |
244 | return 0; |
245 | } |
246 | |
247 | /* |
248 | * Routines for parsing the iBFT data to be human readable. |
249 | */ |
250 | static ssize_t ibft_attr_show_initiator(void *data, int type, char *buf) |
251 | { |
252 | struct ibft_kobject *entry = data; |
253 | struct ibft_initiator *initiator = entry->initiator; |
254 | void *ibft_loc = entry->header; |
255 | char *str = buf; |
256 | |
257 | if (!initiator) |
258 | return 0; |
259 | |
260 | switch (type) { |
261 | case ISCSI_BOOT_INI_INDEX: |
262 | str += sprintf(buf: str, fmt: "%d\n" , initiator->hdr.index); |
263 | break; |
264 | case ISCSI_BOOT_INI_FLAGS: |
265 | str += sprintf(buf: str, fmt: "%d\n" , initiator->hdr.flags); |
266 | break; |
267 | case ISCSI_BOOT_INI_ISNS_SERVER: |
268 | str += sprintf_ipaddr(buf: str, ip: initiator->isns_server); |
269 | break; |
270 | case ISCSI_BOOT_INI_SLP_SERVER: |
271 | str += sprintf_ipaddr(buf: str, ip: initiator->slp_server); |
272 | break; |
273 | case ISCSI_BOOT_INI_PRI_RADIUS_SERVER: |
274 | str += sprintf_ipaddr(buf: str, ip: initiator->pri_radius_server); |
275 | break; |
276 | case ISCSI_BOOT_INI_SEC_RADIUS_SERVER: |
277 | str += sprintf_ipaddr(buf: str, ip: initiator->sec_radius_server); |
278 | break; |
279 | case ISCSI_BOOT_INI_INITIATOR_NAME: |
280 | str += sprintf_string(str, len: initiator->initiator_name_len, |
281 | buf: (char *)ibft_loc + |
282 | initiator->initiator_name_off); |
283 | break; |
284 | default: |
285 | break; |
286 | } |
287 | |
288 | return str - buf; |
289 | } |
290 | |
291 | static ssize_t ibft_attr_show_nic(void *data, int type, char *buf) |
292 | { |
293 | struct ibft_kobject *entry = data; |
294 | struct ibft_nic *nic = entry->nic; |
295 | void *ibft_loc = entry->header; |
296 | char *str = buf; |
297 | __be32 val; |
298 | |
299 | if (!nic) |
300 | return 0; |
301 | |
302 | switch (type) { |
303 | case ISCSI_BOOT_ETH_INDEX: |
304 | str += sprintf(buf: str, fmt: "%d\n" , nic->hdr.index); |
305 | break; |
306 | case ISCSI_BOOT_ETH_FLAGS: |
307 | str += sprintf(buf: str, fmt: "%d\n" , nic->hdr.flags); |
308 | break; |
309 | case ISCSI_BOOT_ETH_IP_ADDR: |
310 | str += sprintf_ipaddr(buf: str, ip: nic->ip_addr); |
311 | break; |
312 | case ISCSI_BOOT_ETH_SUBNET_MASK: |
313 | val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1)); |
314 | str += sprintf(buf: str, fmt: "%pI4" , &val); |
315 | break; |
316 | case ISCSI_BOOT_ETH_PREFIX_LEN: |
317 | str += sprintf(buf: str, fmt: "%d\n" , nic->subnet_mask_prefix); |
318 | break; |
319 | case ISCSI_BOOT_ETH_ORIGIN: |
320 | str += sprintf(buf: str, fmt: "%d\n" , nic->origin); |
321 | break; |
322 | case ISCSI_BOOT_ETH_GATEWAY: |
323 | str += sprintf_ipaddr(buf: str, ip: nic->gateway); |
324 | break; |
325 | case ISCSI_BOOT_ETH_PRIMARY_DNS: |
326 | str += sprintf_ipaddr(buf: str, ip: nic->primary_dns); |
327 | break; |
328 | case ISCSI_BOOT_ETH_SECONDARY_DNS: |
329 | str += sprintf_ipaddr(buf: str, ip: nic->secondary_dns); |
330 | break; |
331 | case ISCSI_BOOT_ETH_DHCP: |
332 | str += sprintf_ipaddr(buf: str, ip: nic->dhcp); |
333 | break; |
334 | case ISCSI_BOOT_ETH_VLAN: |
335 | str += sprintf(buf: str, fmt: "%d\n" , nic->vlan); |
336 | break; |
337 | case ISCSI_BOOT_ETH_MAC: |
338 | str += sprintf(buf: str, fmt: "%pM\n" , nic->mac); |
339 | break; |
340 | case ISCSI_BOOT_ETH_HOSTNAME: |
341 | str += sprintf_string(str, len: nic->hostname_len, |
342 | buf: (char *)ibft_loc + nic->hostname_off); |
343 | break; |
344 | default: |
345 | break; |
346 | } |
347 | |
348 | return str - buf; |
349 | }; |
350 | |
351 | static ssize_t ibft_attr_show_target(void *data, int type, char *buf) |
352 | { |
353 | struct ibft_kobject *entry = data; |
354 | struct ibft_tgt *tgt = entry->tgt; |
355 | void *ibft_loc = entry->header; |
356 | char *str = buf; |
357 | int i; |
358 | |
359 | if (!tgt) |
360 | return 0; |
361 | |
362 | switch (type) { |
363 | case ISCSI_BOOT_TGT_INDEX: |
364 | str += sprintf(buf: str, fmt: "%d\n" , tgt->hdr.index); |
365 | break; |
366 | case ISCSI_BOOT_TGT_FLAGS: |
367 | str += sprintf(buf: str, fmt: "%d\n" , tgt->hdr.flags); |
368 | break; |
369 | case ISCSI_BOOT_TGT_IP_ADDR: |
370 | str += sprintf_ipaddr(buf: str, ip: tgt->ip_addr); |
371 | break; |
372 | case ISCSI_BOOT_TGT_PORT: |
373 | str += sprintf(buf: str, fmt: "%d\n" , tgt->port); |
374 | break; |
375 | case ISCSI_BOOT_TGT_LUN: |
376 | for (i = 0; i < 8; i++) |
377 | str += sprintf(buf: str, fmt: "%x" , (u8)tgt->lun[i]); |
378 | str += sprintf(buf: str, fmt: "\n" ); |
379 | break; |
380 | case ISCSI_BOOT_TGT_NIC_ASSOC: |
381 | str += sprintf(buf: str, fmt: "%d\n" , tgt->nic_assoc); |
382 | break; |
383 | case ISCSI_BOOT_TGT_CHAP_TYPE: |
384 | str += sprintf(buf: str, fmt: "%d\n" , tgt->chap_type); |
385 | break; |
386 | case ISCSI_BOOT_TGT_NAME: |
387 | str += sprintf_string(str, len: tgt->tgt_name_len, |
388 | buf: (char *)ibft_loc + tgt->tgt_name_off); |
389 | break; |
390 | case ISCSI_BOOT_TGT_CHAP_NAME: |
391 | str += sprintf_string(str, len: tgt->chap_name_len, |
392 | buf: (char *)ibft_loc + tgt->chap_name_off); |
393 | break; |
394 | case ISCSI_BOOT_TGT_CHAP_SECRET: |
395 | str += sprintf_string(str, len: tgt->chap_secret_len, |
396 | buf: (char *)ibft_loc + tgt->chap_secret_off); |
397 | break; |
398 | case ISCSI_BOOT_TGT_REV_CHAP_NAME: |
399 | str += sprintf_string(str, len: tgt->rev_chap_name_len, |
400 | buf: (char *)ibft_loc + |
401 | tgt->rev_chap_name_off); |
402 | break; |
403 | case ISCSI_BOOT_TGT_REV_CHAP_SECRET: |
404 | str += sprintf_string(str, len: tgt->rev_chap_secret_len, |
405 | buf: (char *)ibft_loc + |
406 | tgt->rev_chap_secret_off); |
407 | break; |
408 | default: |
409 | break; |
410 | } |
411 | |
412 | return str - buf; |
413 | } |
414 | |
415 | static ssize_t ibft_attr_show_acpitbl(void *data, int type, char *buf) |
416 | { |
417 | struct ibft_kobject *entry = data; |
418 | char *str = buf; |
419 | |
420 | switch (type) { |
421 | case ISCSI_BOOT_ACPITBL_SIGNATURE: |
422 | str += sprintf_string(str, ACPI_NAMESEG_SIZE, |
423 | buf: entry->header->header.signature); |
424 | break; |
425 | case ISCSI_BOOT_ACPITBL_OEM_ID: |
426 | str += sprintf_string(str, ACPI_OEM_ID_SIZE, |
427 | buf: entry->header->header.oem_id); |
428 | break; |
429 | case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID: |
430 | str += sprintf_string(str, ACPI_OEM_TABLE_ID_SIZE, |
431 | buf: entry->header->header.oem_table_id); |
432 | break; |
433 | default: |
434 | break; |
435 | } |
436 | |
437 | return str - buf; |
438 | } |
439 | |
440 | static int __init ibft_check_device(void) |
441 | { |
442 | int len; |
443 | u8 *pos; |
444 | u8 csum = 0; |
445 | |
446 | len = ibft_addr->header.length; |
447 | |
448 | /* Sanity checking of iBFT. */ |
449 | if (ibft_addr->header.revision != 1) { |
450 | printk(KERN_ERR "iBFT module supports only revision 1, " \ |
451 | "while this is %d.\n" , |
452 | ibft_addr->header.revision); |
453 | return -ENOENT; |
454 | } |
455 | for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++) |
456 | csum += *pos; |
457 | |
458 | if (csum) { |
459 | printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n" , csum); |
460 | return -ENOENT; |
461 | } |
462 | |
463 | return 0; |
464 | } |
465 | |
466 | /* |
467 | * Helper routiners to check to determine if the entry is valid |
468 | * in the proper iBFT structure. |
469 | */ |
470 | static umode_t ibft_check_nic_for(void *data, int type) |
471 | { |
472 | struct ibft_kobject *entry = data; |
473 | struct ibft_nic *nic = entry->nic; |
474 | umode_t rc = 0; |
475 | |
476 | switch (type) { |
477 | case ISCSI_BOOT_ETH_INDEX: |
478 | case ISCSI_BOOT_ETH_FLAGS: |
479 | rc = S_IRUGO; |
480 | break; |
481 | case ISCSI_BOOT_ETH_IP_ADDR: |
482 | if (address_not_null(ip: nic->ip_addr)) |
483 | rc = S_IRUGO; |
484 | break; |
485 | case ISCSI_BOOT_ETH_PREFIX_LEN: |
486 | case ISCSI_BOOT_ETH_SUBNET_MASK: |
487 | if (nic->subnet_mask_prefix) |
488 | rc = S_IRUGO; |
489 | break; |
490 | case ISCSI_BOOT_ETH_ORIGIN: |
491 | rc = S_IRUGO; |
492 | break; |
493 | case ISCSI_BOOT_ETH_GATEWAY: |
494 | if (address_not_null(ip: nic->gateway)) |
495 | rc = S_IRUGO; |
496 | break; |
497 | case ISCSI_BOOT_ETH_PRIMARY_DNS: |
498 | if (address_not_null(ip: nic->primary_dns)) |
499 | rc = S_IRUGO; |
500 | break; |
501 | case ISCSI_BOOT_ETH_SECONDARY_DNS: |
502 | if (address_not_null(ip: nic->secondary_dns)) |
503 | rc = S_IRUGO; |
504 | break; |
505 | case ISCSI_BOOT_ETH_DHCP: |
506 | if (address_not_null(ip: nic->dhcp)) |
507 | rc = S_IRUGO; |
508 | break; |
509 | case ISCSI_BOOT_ETH_VLAN: |
510 | case ISCSI_BOOT_ETH_MAC: |
511 | rc = S_IRUGO; |
512 | break; |
513 | case ISCSI_BOOT_ETH_HOSTNAME: |
514 | if (nic->hostname_off) |
515 | rc = S_IRUGO; |
516 | break; |
517 | default: |
518 | break; |
519 | } |
520 | |
521 | return rc; |
522 | } |
523 | |
524 | static umode_t __init ibft_check_tgt_for(void *data, int type) |
525 | { |
526 | struct ibft_kobject *entry = data; |
527 | struct ibft_tgt *tgt = entry->tgt; |
528 | umode_t rc = 0; |
529 | |
530 | switch (type) { |
531 | case ISCSI_BOOT_TGT_INDEX: |
532 | case ISCSI_BOOT_TGT_FLAGS: |
533 | case ISCSI_BOOT_TGT_IP_ADDR: |
534 | case ISCSI_BOOT_TGT_PORT: |
535 | case ISCSI_BOOT_TGT_LUN: |
536 | case ISCSI_BOOT_TGT_NIC_ASSOC: |
537 | case ISCSI_BOOT_TGT_CHAP_TYPE: |
538 | rc = S_IRUGO; |
539 | break; |
540 | case ISCSI_BOOT_TGT_NAME: |
541 | if (tgt->tgt_name_len) |
542 | rc = S_IRUGO; |
543 | break; |
544 | case ISCSI_BOOT_TGT_CHAP_NAME: |
545 | case ISCSI_BOOT_TGT_CHAP_SECRET: |
546 | if (tgt->chap_name_len) |
547 | rc = S_IRUGO; |
548 | break; |
549 | case ISCSI_BOOT_TGT_REV_CHAP_NAME: |
550 | case ISCSI_BOOT_TGT_REV_CHAP_SECRET: |
551 | if (tgt->rev_chap_name_len) |
552 | rc = S_IRUGO; |
553 | break; |
554 | default: |
555 | break; |
556 | } |
557 | |
558 | return rc; |
559 | } |
560 | |
561 | static umode_t __init ibft_check_initiator_for(void *data, int type) |
562 | { |
563 | struct ibft_kobject *entry = data; |
564 | struct ibft_initiator *init = entry->initiator; |
565 | umode_t rc = 0; |
566 | |
567 | switch (type) { |
568 | case ISCSI_BOOT_INI_INDEX: |
569 | case ISCSI_BOOT_INI_FLAGS: |
570 | rc = S_IRUGO; |
571 | break; |
572 | case ISCSI_BOOT_INI_ISNS_SERVER: |
573 | if (address_not_null(ip: init->isns_server)) |
574 | rc = S_IRUGO; |
575 | break; |
576 | case ISCSI_BOOT_INI_SLP_SERVER: |
577 | if (address_not_null(ip: init->slp_server)) |
578 | rc = S_IRUGO; |
579 | break; |
580 | case ISCSI_BOOT_INI_PRI_RADIUS_SERVER: |
581 | if (address_not_null(ip: init->pri_radius_server)) |
582 | rc = S_IRUGO; |
583 | break; |
584 | case ISCSI_BOOT_INI_SEC_RADIUS_SERVER: |
585 | if (address_not_null(ip: init->sec_radius_server)) |
586 | rc = S_IRUGO; |
587 | break; |
588 | case ISCSI_BOOT_INI_INITIATOR_NAME: |
589 | if (init->initiator_name_len) |
590 | rc = S_IRUGO; |
591 | break; |
592 | default: |
593 | break; |
594 | } |
595 | |
596 | return rc; |
597 | } |
598 | |
599 | static umode_t __init ibft_check_acpitbl_for(void *data, int type) |
600 | { |
601 | |
602 | umode_t rc = 0; |
603 | |
604 | switch (type) { |
605 | case ISCSI_BOOT_ACPITBL_SIGNATURE: |
606 | case ISCSI_BOOT_ACPITBL_OEM_ID: |
607 | case ISCSI_BOOT_ACPITBL_OEM_TABLE_ID: |
608 | rc = S_IRUGO; |
609 | break; |
610 | default: |
611 | break; |
612 | } |
613 | |
614 | return rc; |
615 | } |
616 | |
617 | static void ibft_kobj_release(void *data) |
618 | { |
619 | kfree(objp: data); |
620 | } |
621 | |
622 | /* |
623 | * Helper function for ibft_register_kobjects. |
624 | */ |
625 | static int __init ibft_create_kobject(struct acpi_table_ibft *, |
626 | struct ibft_hdr *hdr) |
627 | { |
628 | struct iscsi_boot_kobj *boot_kobj = NULL; |
629 | struct ibft_kobject *ibft_kobj = NULL; |
630 | struct ibft_nic *nic = (struct ibft_nic *)hdr; |
631 | struct pci_dev *pci_dev; |
632 | int rc = 0; |
633 | |
634 | ibft_kobj = kzalloc(size: sizeof(*ibft_kobj), GFP_KERNEL); |
635 | if (!ibft_kobj) |
636 | return -ENOMEM; |
637 | |
638 | ibft_kobj->header = header; |
639 | ibft_kobj->hdr = hdr; |
640 | |
641 | switch (hdr->id) { |
642 | case id_initiator: |
643 | rc = ibft_verify_hdr(t: "initiator" , hdr, id: id_initiator, |
644 | length: sizeof(*ibft_kobj->initiator)); |
645 | if (rc) |
646 | break; |
647 | |
648 | boot_kobj = iscsi_boot_create_initiator(boot_kset, index: hdr->index, |
649 | data: ibft_kobj, |
650 | show: ibft_attr_show_initiator, |
651 | is_visible: ibft_check_initiator_for, |
652 | release: ibft_kobj_release); |
653 | if (!boot_kobj) { |
654 | rc = -ENOMEM; |
655 | goto free_ibft_obj; |
656 | } |
657 | break; |
658 | case id_nic: |
659 | rc = ibft_verify_hdr(t: "ethernet" , hdr, id: id_nic, |
660 | length: sizeof(*ibft_kobj->nic)); |
661 | if (rc) |
662 | break; |
663 | |
664 | boot_kobj = iscsi_boot_create_ethernet(boot_kset, index: hdr->index, |
665 | data: ibft_kobj, |
666 | show: ibft_attr_show_nic, |
667 | is_visible: ibft_check_nic_for, |
668 | release: ibft_kobj_release); |
669 | if (!boot_kobj) { |
670 | rc = -ENOMEM; |
671 | goto free_ibft_obj; |
672 | } |
673 | break; |
674 | case id_target: |
675 | rc = ibft_verify_hdr(t: "target" , hdr, id: id_target, |
676 | length: sizeof(*ibft_kobj->tgt)); |
677 | if (rc) |
678 | break; |
679 | |
680 | boot_kobj = iscsi_boot_create_target(boot_kset, index: hdr->index, |
681 | data: ibft_kobj, |
682 | show: ibft_attr_show_target, |
683 | is_visible: ibft_check_tgt_for, |
684 | release: ibft_kobj_release); |
685 | if (!boot_kobj) { |
686 | rc = -ENOMEM; |
687 | goto free_ibft_obj; |
688 | } |
689 | break; |
690 | case id_reserved: |
691 | case id_control: |
692 | case id_extensions: |
693 | /* Fields which we don't support. Ignore them */ |
694 | rc = 1; |
695 | break; |
696 | default: |
697 | printk(KERN_ERR "iBFT has unknown structure type (%d). " \ |
698 | "Report this bug to %.6s!\n" , hdr->id, |
699 | header->header.oem_id); |
700 | rc = 1; |
701 | break; |
702 | } |
703 | |
704 | if (rc) { |
705 | /* Skip adding this kobject, but exit with non-fatal error. */ |
706 | rc = 0; |
707 | goto free_ibft_obj; |
708 | } |
709 | |
710 | if (hdr->id == id_nic) { |
711 | /* |
712 | * We don't search for the device in other domains than |
713 | * zero. This is because on x86 platforms the BIOS |
714 | * executes only devices which are in domain 0. Furthermore, the |
715 | * iBFT spec doesn't have a domain id field :-( |
716 | */ |
717 | pci_dev = pci_get_domain_bus_and_slot(domain: 0, |
718 | bus: (nic->pci_bdf & 0xff00) >> 8, |
719 | devfn: (nic->pci_bdf & 0xff)); |
720 | if (pci_dev) { |
721 | rc = sysfs_create_link(kobj: &boot_kobj->kobj, |
722 | target: &pci_dev->dev.kobj, name: "device" ); |
723 | pci_dev_put(dev: pci_dev); |
724 | } |
725 | } |
726 | return 0; |
727 | |
728 | free_ibft_obj: |
729 | kfree(objp: ibft_kobj); |
730 | return rc; |
731 | } |
732 | |
733 | /* |
734 | * Scan the IBFT table structure for the NIC and Target fields. When |
735 | * found add them on the passed-in list. We do not support the other |
736 | * fields at this point, so they are skipped. |
737 | */ |
738 | static int __init ibft_register_kobjects(struct acpi_table_ibft *) |
739 | { |
740 | struct ibft_control *control = NULL; |
741 | struct iscsi_boot_kobj *boot_kobj; |
742 | struct ibft_kobject *ibft_kobj; |
743 | void *ptr, *end; |
744 | int rc = 0; |
745 | u16 offset; |
746 | u16 eot_offset; |
747 | |
748 | control = (void *)header + sizeof(*header); |
749 | end = (void *)control + control->hdr.length; |
750 | eot_offset = (void *)header + header->header.length - (void *)control; |
751 | rc = ibft_verify_hdr(t: "control" , hdr: (struct ibft_hdr *)control, id: id_control, length: 0); |
752 | |
753 | /* iBFT table safety checking */ |
754 | rc |= ((control->hdr.index) ? -ENODEV : 0); |
755 | rc |= ((control->hdr.length < sizeof(*control)) ? -ENODEV : 0); |
756 | if (rc) { |
757 | printk(KERN_ERR "iBFT error: Control header is invalid!\n" ); |
758 | return rc; |
759 | } |
760 | for (ptr = &control->initiator_off; ptr + sizeof(u16) <= end; ptr += sizeof(u16)) { |
761 | offset = *(u16 *)ptr; |
762 | if (offset && offset < header->header.length && |
763 | offset < eot_offset) { |
764 | rc = ibft_create_kobject(header, |
765 | hdr: (void *)header + offset); |
766 | if (rc) |
767 | break; |
768 | } |
769 | } |
770 | if (rc) |
771 | return rc; |
772 | |
773 | ibft_kobj = kzalloc(size: sizeof(*ibft_kobj), GFP_KERNEL); |
774 | if (!ibft_kobj) |
775 | return -ENOMEM; |
776 | |
777 | ibft_kobj->header = header; |
778 | ibft_kobj->hdr = NULL; /*for ibft_unregister*/ |
779 | |
780 | boot_kobj = iscsi_boot_create_acpitbl(boot_kset, index: 0, |
781 | data: ibft_kobj, |
782 | show: ibft_attr_show_acpitbl, |
783 | is_visible: ibft_check_acpitbl_for, |
784 | release: ibft_kobj_release); |
785 | if (!boot_kobj) { |
786 | kfree(objp: ibft_kobj); |
787 | rc = -ENOMEM; |
788 | } |
789 | |
790 | return rc; |
791 | } |
792 | |
793 | static void ibft_unregister(void) |
794 | { |
795 | struct iscsi_boot_kobj *boot_kobj, *tmp_kobj; |
796 | struct ibft_kobject *ibft_kobj; |
797 | |
798 | list_for_each_entry_safe(boot_kobj, tmp_kobj, |
799 | &boot_kset->kobj_list, list) { |
800 | ibft_kobj = boot_kobj->data; |
801 | if (ibft_kobj->hdr && ibft_kobj->hdr->id == id_nic) |
802 | sysfs_remove_link(kobj: &boot_kobj->kobj, name: "device" ); |
803 | }; |
804 | } |
805 | |
806 | static void ibft_cleanup(void) |
807 | { |
808 | if (boot_kset) { |
809 | ibft_unregister(); |
810 | iscsi_boot_destroy_kset(boot_kset); |
811 | } |
812 | } |
813 | |
814 | static void __exit ibft_exit(void) |
815 | { |
816 | ibft_cleanup(); |
817 | } |
818 | |
819 | #ifdef CONFIG_ACPI |
820 | static const struct { |
821 | char *sign; |
822 | } ibft_signs[] = { |
823 | /* |
824 | * One spec says "IBFT", the other says "iBFT". We have to check |
825 | * for both. |
826 | */ |
827 | { ACPI_SIG_IBFT }, |
828 | { "iBFT" }, |
829 | { "BIFT" }, /* Broadcom iSCSI Offload */ |
830 | }; |
831 | |
832 | static void __init acpi_find_ibft_region(void) |
833 | { |
834 | int i; |
835 | struct acpi_table_header *table = NULL; |
836 | |
837 | if (acpi_disabled) |
838 | return; |
839 | |
840 | for (i = 0; i < ARRAY_SIZE(ibft_signs) && !ibft_addr; i++) { |
841 | acpi_get_table(signature: ibft_signs[i].sign, instance: 0, out_table: &table); |
842 | ibft_addr = (struct acpi_table_ibft *)table; |
843 | } |
844 | } |
845 | #else |
846 | static void __init acpi_find_ibft_region(void) |
847 | { |
848 | } |
849 | #endif |
850 | #ifdef CONFIG_ISCSI_IBFT_FIND |
851 | static int __init acpi_find_isa_region(void) |
852 | { |
853 | if (ibft_phys_addr) { |
854 | ibft_addr = isa_bus_to_virt(address: ibft_phys_addr); |
855 | return 0; |
856 | } |
857 | return -ENODEV; |
858 | } |
859 | #else |
860 | static int __init acpi_find_isa_region(void) |
861 | { |
862 | return -ENODEV; |
863 | } |
864 | #endif |
865 | /* |
866 | * ibft_init() - creates sysfs tree entries for the iBFT data. |
867 | */ |
868 | static int __init ibft_init(void) |
869 | { |
870 | int rc = 0; |
871 | |
872 | /* |
873 | As on UEFI systems the setup_arch()/reserve_ibft_region() |
874 | is called before ACPI tables are parsed and it only does |
875 | legacy finding. |
876 | */ |
877 | if (acpi_find_isa_region()) |
878 | acpi_find_ibft_region(); |
879 | |
880 | if (ibft_addr) { |
881 | pr_info("iBFT detected.\n" ); |
882 | |
883 | rc = ibft_check_device(); |
884 | if (rc) |
885 | return rc; |
886 | |
887 | boot_kset = iscsi_boot_create_kset(set_name: "ibft" ); |
888 | if (!boot_kset) |
889 | return -ENOMEM; |
890 | |
891 | /* Scan the IBFT for data and register the kobjects. */ |
892 | rc = ibft_register_kobjects(header: ibft_addr); |
893 | if (rc) |
894 | goto out_free; |
895 | } else |
896 | printk(KERN_INFO "No iBFT detected.\n" ); |
897 | |
898 | return 0; |
899 | |
900 | out_free: |
901 | ibft_cleanup(); |
902 | return rc; |
903 | } |
904 | |
905 | module_init(ibft_init); |
906 | module_exit(ibft_exit); |
907 | |