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 85 MODULE_AUTHOR("Peter Jones <pjones@redhat.com> and \ 86 Konrad Rzeszutek <ketuzsezr@darnok.org>"); 87 MODULE_DESCRIPTION("sysfs interface to BIOS iBFT information"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBFT_ISCSI_VERSION); 90 91 struct ibft_hdr { 92 u8 id; 93 u8 version; 94 u16 length; 95 u8 index; 96 u8 flags; 97 } __attribute__((__packed__)); 98 99 struct ibft_control { 100 struct ibft_hdr hdr; 101 u16 extensions; 102 u16 initiator_off; 103 u16 nic0_off; 104 u16 tgt0_off; 105 u16 nic1_off; 106 u16 tgt1_off; 107 } __attribute__((__packed__)); 108 109 struct ibft_initiator { 110 struct ibft_hdr hdr; 111 char isns_server[16]; 112 char slp_server[16]; 113 char pri_radius_server[16]; 114 char sec_radius_server[16]; 115 u16 initiator_name_len; 116 u16 initiator_name_off; 117 } __attribute__((__packed__)); 118 119 struct ibft_nic { 120 struct ibft_hdr hdr; 121 char ip_addr[16]; 122 u8 subnet_mask_prefix; 123 u8 origin; 124 char gateway[16]; 125 char primary_dns[16]; 126 char secondary_dns[16]; 127 char dhcp[16]; 128 u16 vlan; 129 char mac[6]; 130 u16 pci_bdf; 131 u16 hostname_len; 132 u16 hostname_off; 133 } __attribute__((__packed__)); 134 135 struct ibft_tgt { 136 struct ibft_hdr hdr; 137 char ip_addr[16]; 138 u16 port; 139 char lun[8]; 140 u8 chap_type; 141 u8 nic_assoc; 142 u16 tgt_name_len; 143 u16 tgt_name_off; 144 u16 chap_name_len; 145 u16 chap_name_off; 146 u16 chap_secret_len; 147 u16 chap_secret_off; 148 u16 rev_chap_name_len; 149 u16 rev_chap_name_off; 150 u16 rev_chap_secret_len; 151 u16 rev_chap_secret_off; 152 } __attribute__((__packed__)); 153 154 /* 155 * The kobject different types and its names. 156 * 157 */ 158 enum 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 */ 172 static 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 */ 178 enum 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 }; 194 195 static 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}; 199 200 enum 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 }; 215 216 static 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}; 220 221 enum 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 }; 231 232 static 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 */ 239 240 struct 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 }; 251 252 struct 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 }; 268 269 static LIST_HEAD(ibft_attr_list); 270 static LIST_HEAD(ibft_kobject_list); 271 272 static const char nulls[16]; 273 274 /* 275 * Helper functions to parse data properly. 276 */ 277 static 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, "%pI4", ip + 12); 288 } else { 289 /* 290 * IPv6 291 */ 292 str += sprintf(str, "%pI6", ip); 293 } 294 str += sprintf(str, "\n"); 295 return str - buf; 296 } 297 298 static ssize_t sprintf_string(char *str, int len, char *buf) 299 { 300 return sprintf(str, "%.*s\n", len, buf); 301 } 302 303 /* 304 * Helper function to verify the IBFT header. 305 */ 306 static int ibft_verify_hdr(char *t, struct ibft_hdr *hdr, int id, int length) 307 { 308 if (hdr->id != id) { 309 printk(KERN_ERR "iBFT error: We expected the " \ 310 "field header.id to have %d but " \ 311 "found %d instead!\n", id, hdr->id); 312 return -ENODEV; 313 } 314 if (hdr->length != length) { 315 printk(KERN_ERR "iBFT error: We expected the " \ 316 "field header.length to have %d but " \ 317 "found %d instead!\n", length, hdr->length); 318 return -ENODEV; 319 } 320 321 return 0; 322 } 323 324 static void ibft_release(struct kobject *kobj) 325 { 326 struct ibft_kobject *ibft = 327 container_of(kobj, struct ibft_kobject, kobj); 328 kfree(ibft); 329 } 330 331 /* 332 * Routines for parsing the iBFT data to be human readable. 333 */ 334 static ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry, 335 struct ibft_attribute *attr, 336 char *buf) 337 { 338 struct ibft_initiator *initiator = entry->initiator; 339 void *ibft_loc = entry->header; 340 char *str = buf; 341 342 if (!initiator) 343 return 0; 344 345 switch (attr->type) { 346 case ibft_init_index: 347 str += sprintf(str, "%d\n", initiator->hdr.index); 348 break; 349 case ibft_init_flags: 350 str += sprintf(str, "%d\n", initiator->hdr.flags); 351 break; 352 case ibft_init_isns_server: 353 str += sprintf_ipaddr(str, initiator->isns_server); 354 break; 355 case ibft_init_slp_server: 356 str += sprintf_ipaddr(str, initiator->slp_server); 357 break; 358 case ibft_init_pri_radius_server: 359 str += sprintf_ipaddr(str, initiator->pri_radius_server); 360 break; 361 case ibft_init_sec_radius_server: 362 str += sprintf_ipaddr(str, initiator->sec_radius_server); 363 break; 364 case ibft_init_initiator_name: 365 str += sprintf_string(str, initiator->initiator_name_len, 366 (char *)ibft_loc + 367 initiator->initiator_name_off); 368 break; 369 default: 370 break; 371 } 372 373 return str - buf; 374 } 375 376 static ssize_t ibft_attr_show_nic(struct ibft_kobject *entry, 377 struct ibft_attribute *attr, 378 char *buf) 379 { 380 struct ibft_nic *nic = entry->nic; 381 void *ibft_loc = entry->header; 382 char *str = buf; 383 char *mac; 384 __be32 val; 385 386 if (!nic) 387 return 0; 388 389 switch (attr->type) { 390 case ibft_eth_index: 391 str += sprintf(str, "%d\n", nic->hdr.index); 392 break; 393 case ibft_eth_flags: 394 str += sprintf(str, "%d\n", nic->hdr.flags); 395 break; 396 case ibft_eth_ip_addr: 397 str += sprintf_ipaddr(str, nic->ip_addr); 398 break; 399 case ibft_eth_subnet_mask: 400 val = cpu_to_be32(~((1 << (32-nic->subnet_mask_prefix))-1)); 401 str += sprintf(str, "%pI4", &val); 402 break; 403 case ibft_eth_origin: 404 str += sprintf(str, "%d\n", nic->origin); 405 break; 406 case ibft_eth_gateway: 407 str += sprintf_ipaddr(str, nic->gateway); 408 break; 409 case ibft_eth_primary_dns: 410 str += sprintf_ipaddr(str, nic->primary_dns); 411 break; 412 case ibft_eth_secondary_dns: 413 str += sprintf_ipaddr(str, nic->secondary_dns); 414 break; 415 case ibft_eth_dhcp: 416 str += sprintf_ipaddr(str, nic->dhcp); 417 break; 418 case ibft_eth_vlan: 419 str += sprintf(str, "%d\n", nic->vlan); 420 break; 421 case ibft_eth_mac: 422 mac = nic->mac; 423 str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n", 424 (u8)mac[0], (u8)mac[1], (u8)mac[2], 425 (u8)mac[3], (u8)mac[4], (u8)mac[5]); 426 break; 427 case ibft_eth_hostname: 428 str += sprintf_string(str, nic->hostname_len, 429 (char *)ibft_loc + nic->hostname_off); 430 break; 431 default: 432 break; 433 } 434 435 return str - buf; 436 }; 437 438 static ssize_t ibft_attr_show_target(struct ibft_kobject *entry, 439 struct ibft_attribute *attr, 440 char *buf) 441 { 442 struct ibft_tgt *tgt = entry->tgt; 443 void *ibft_loc = entry->header; 444 char *str = buf; 445 int i; 446 447 if (!tgt) 448 return 0; 449 450 switch (attr->type) { 451 case ibft_tgt_index: 452 str += sprintf(str, "%d\n", tgt->hdr.index); 453 break; 454 case ibft_tgt_flags: 455 str += sprintf(str, "%d\n", tgt->hdr.flags); 456 break; 457 case ibft_tgt_ip_addr: 458 str += sprintf_ipaddr(str, tgt->ip_addr); 459 break; 460 case ibft_tgt_port: 461 str += sprintf(str, "%d\n", tgt->port); 462 break; 463 case ibft_tgt_lun: 464 for (i = 0; i < 8; i++) 465 str += sprintf(str, "%x", (u8)tgt->lun[i]); 466 str += sprintf(str, "\n"); 467 break; 468 case ibft_tgt_nic_assoc: 469 str += sprintf(str, "%d\n", tgt->nic_assoc); 470 break; 471 case ibft_tgt_chap_type: 472 str += sprintf(str, "%d\n", tgt->chap_type); 473 break; 474 case ibft_tgt_name: 475 str += sprintf_string(str, tgt->tgt_name_len, 476 (char *)ibft_loc + tgt->tgt_name_off); 477 break; 478 case ibft_tgt_chap_name: 479 str += sprintf_string(str, tgt->chap_name_len, 480 (char *)ibft_loc + tgt->chap_name_off); 481 break; 482 case ibft_tgt_chap_secret: 483 str += sprintf_string(str, tgt->chap_secret_len, 484 (char *)ibft_loc + tgt->chap_secret_off); 485 break; 486 case ibft_tgt_rev_chap_name: 487 str += sprintf_string(str, tgt->rev_chap_name_len, 488 (char *)ibft_loc + 489 tgt->rev_chap_name_off); 490 break; 491 case ibft_tgt_rev_chap_secret: 492 str += sprintf_string(str, tgt->rev_chap_secret_len, 493 (char *)ibft_loc + 494 tgt->rev_chap_secret_off); 495 break; 496 default: 497 break; 498 } 499 500 return str - buf; 501 } 502 503 /* 504 * The routine called for all sysfs attributes. 505 */ 506 static ssize_t ibft_show_attribute(struct kobject *kobj, 507 struct attribute *attr, 508 char *buf) 509 { 510 struct ibft_kobject *dev = 511 container_of(kobj, struct ibft_kobject, kobj); 512 struct ibft_attribute *ibft_attr = 513 container_of(attr, struct ibft_attribute, attr); 514 ssize_t ret = -EIO; 515 char *str = buf; 516 517 if (!capable(CAP_SYS_ADMIN)) 518 return -EACCES; 519 520 if (ibft_attr->show) 521 ret = ibft_attr->show(dev, ibft_attr, str); 522 523 return ret; 524 } 525 526 static struct sysfs_ops ibft_attr_ops = { 527 .show = ibft_show_attribute, 528 }; 529 530 static struct kobj_type ibft_ktype = { 531 .release = ibft_release, 532 .sysfs_ops = &ibft_attr_ops, 533 }; 534 535 static struct kset *ibft_kset; 536 537 static int __init ibft_check_device(void) 538 { 539 int len; 540 u8 *pos; 541 u8 csum = 0; 542 543 len = ibft_addr->length; 544 545 /* Sanity checking of iBFT. */ 546 if (ibft_addr->revision != 1) { 547 printk(KERN_ERR "iBFT module supports only revision 1, " \ 548 "while this is %d.\n", ibft_addr->revision); 549 return -ENOENT; 550 } 551 for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++) 552 csum += *pos; 553 554 if (csum) { 555 printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum); 556 return -ENOENT; 557 } 558 559 return 0; 560 } 561 562 /* 563 * Helper function for ibft_register_kobjects. 564 */ 565 static int __init ibft_create_kobject(struct ibft_table_header *header, 566 struct ibft_hdr *hdr, 567 struct list_head *list) 568 { 569 struct ibft_kobject *ibft_kobj = NULL; 570 struct ibft_nic *nic = (struct ibft_nic *)hdr; 571 struct pci_dev *pci_dev; 572 int rc = 0; 573 574 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL); 575 if (!ibft_kobj) 576 return -ENOMEM; 577 578 ibft_kobj->header = header; 579 ibft_kobj->hdr = hdr; 580 581 switch (hdr->id) { 582 case id_initiator: 583 rc = ibft_verify_hdr("initiator", hdr, id_initiator, 584 sizeof(*ibft_kobj->initiator)); 585 break; 586 case id_nic: 587 rc = ibft_verify_hdr("ethernet", hdr, id_nic, 588 sizeof(*ibft_kobj->nic)); 589 break; 590 case id_target: 591 rc = ibft_verify_hdr("target", hdr, id_target, 592 sizeof(*ibft_kobj->tgt)); 593 break; 594 case id_reserved: 595 case id_control: 596 case id_extensions: 597 /* Fields which we don't support. Ignore them */ 598 rc = 1; 599 break; 600 default: 601 printk(KERN_ERR "iBFT has unknown structure type (%d). " \ 602 "Report this bug to %.6s!\n", hdr->id, 603 header->oem_id); 604 rc = 1; 605 break; 606 } 607 608 if (rc) { 609 /* Skip adding this kobject, but exit with non-fatal error. */ 610 kfree(ibft_kobj); 611 goto out_invalid_struct; 612 } 613 614 ibft_kobj->kobj.kset = ibft_kset; 615 616 rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype, 617 NULL, ibft_id_names[hdr->id], hdr->index); 618 619 if (rc) { 620 kfree(ibft_kobj); 621 goto out; 622 } 623 624 kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD); 625 626 if (hdr->id == id_nic) { 627 /* 628 * We don't search for the device in other domains than 629 * zero. This is because on x86 platforms the BIOS 630 * executes only devices which are in domain 0. Furthermore, the 631 * iBFT spec doesn't have a domain id field :-( 632 */ 633 pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8, 634 (nic->pci_bdf & 0xff)); 635 if (pci_dev) { 636 rc = sysfs_create_link(&ibft_kobj->kobj, 637 &pci_dev->dev.kobj, "device"); 638 pci_dev_put(pci_dev); 639 } 640 } 641 642 /* Nothing broke so lets add it to the list. */ 643 list_add_tail(&ibft_kobj->node, list); 644 out: 645 return rc; 646 out_invalid_struct: 647 /* Unsupported structs are skipped. */ 648 return 0; 649 } 650 651 /* 652 * Scan the IBFT table structure for the NIC and Target fields. When 653 * found add them on the passed-in list. We do not support the other 654 * fields at this point, so they are skipped. 655 */ 656 static int __init ibft_register_kobjects(struct ibft_table_header *header, 657 struct list_head *list) 658 { 659 struct ibft_control *control = NULL; 660 void *ptr, *end; 661 int rc = 0; 662 u16 offset; 663 u16 eot_offset; 664 665 control = (void *)header + sizeof(*header); 666 end = (void *)control + control->hdr.length; 667 eot_offset = (void *)header + header->length - (void *)control; 668 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control, 669 sizeof(*control)); 670 671 /* iBFT table safety checking */ 672 rc |= ((control->hdr.index) ? -ENODEV : 0); 673 if (rc) { 674 printk(KERN_ERR "iBFT error: Control header is invalid!\n"); 675 return rc; 676 } 677 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) { 678 offset = *(u16 *)ptr; 679 if (offset && offset < header->length && offset < eot_offset) { 680 rc = ibft_create_kobject(header, 681 (void *)header + offset, 682 list); 683 if (rc) 684 break; 685 } 686 } 687 688 return rc; 689 } 690 691 static void ibft_unregister(struct list_head *attr_list, 692 struct list_head *kobj_list) 693 { 694 struct ibft_kobject *data = NULL, *n; 695 struct ibft_attribute *attr = NULL, *m; 696 697 list_for_each_entry_safe(attr, m, attr_list, node) { 698 sysfs_remove_file(attr->kobj, &attr->attr); 699 list_del(&attr->node); 700 kfree(attr); 701 }; 702 list_del_init(attr_list); 703 704 list_for_each_entry_safe(data, n, kobj_list, node) { 705 list_del(&data->node); 706 if (data->hdr->id == id_nic) 707 sysfs_remove_link(&data->kobj, "device"); 708 kobject_put(&data->kobj); 709 }; 710 list_del_init(kobj_list); 711 } 712 713 static int __init ibft_create_attribute(struct ibft_kobject *kobj_data, 714 int type, 715 const char *name, 716 ssize_t (*show)(struct ibft_kobject *, 717 struct ibft_attribute*, 718 char *buf), 719 struct list_head *list) 720 { 721 struct ibft_attribute *attr = NULL; 722 struct ibft_hdr *hdr = kobj_data->hdr; 723 724 attr = kmalloc(sizeof(*attr), GFP_KERNEL); 725 if (!attr) 726 return -ENOMEM; 727 728 attr->attr.name = name; 729 attr->attr.mode = S_IRUSR; 730 731 attr->hdr = hdr; 732 attr->show = show; 733 attr->kobj = &kobj_data->kobj; 734 attr->type = type; 735 736 list_add_tail(&attr->node, list); 737 738 return 0; 739 } 740 741 /* 742 * Helper routiners to check to determine if the entry is valid 743 * in the proper iBFT structure. 744 */ 745 static int __init ibft_check_nic_for(struct ibft_nic *nic, int entry) 746 { 747 int rc = 0; 748 749 switch (entry) { 750 case ibft_eth_index: 751 case ibft_eth_flags: 752 rc = 1; 753 break; 754 case ibft_eth_ip_addr: 755 if (memcmp(nic->ip_addr, nulls, sizeof(nic->ip_addr))) 756 rc = 1; 757 break; 758 case ibft_eth_subnet_mask: 759 if (nic->subnet_mask_prefix) 760 rc = 1; 761 break; 762 case ibft_eth_origin: 763 rc = 1; 764 break; 765 case ibft_eth_gateway: 766 if (memcmp(nic->gateway, nulls, sizeof(nic->gateway))) 767 rc = 1; 768 break; 769 case ibft_eth_primary_dns: 770 if (memcmp(nic->primary_dns, nulls, 771 sizeof(nic->primary_dns))) 772 rc = 1; 773 break; 774 case ibft_eth_secondary_dns: 775 if (memcmp(nic->secondary_dns, nulls, 776 sizeof(nic->secondary_dns))) 777 rc = 1; 778 break; 779 case ibft_eth_dhcp: 780 if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) 781 rc = 1; 782 break; 783 case ibft_eth_vlan: 784 case ibft_eth_mac: 785 rc = 1; 786 break; 787 case ibft_eth_hostname: 788 if (nic->hostname_off) 789 rc = 1; 790 break; 791 default: 792 break; 793 } 794 795 return rc; 796 } 797 798 static int __init ibft_check_tgt_for(struct ibft_tgt *tgt, int entry) 799 { 800 int rc = 0; 801 802 switch (entry) { 803 case ibft_tgt_index: 804 case ibft_tgt_flags: 805 case ibft_tgt_ip_addr: 806 case ibft_tgt_port: 807 case ibft_tgt_lun: 808 case ibft_tgt_nic_assoc: 809 case ibft_tgt_chap_type: 810 rc = 1; 811 case ibft_tgt_name: 812 if (tgt->tgt_name_len) 813 rc = 1; 814 break; 815 case ibft_tgt_chap_name: 816 case ibft_tgt_chap_secret: 817 if (tgt->chap_name_len) 818 rc = 1; 819 break; 820 case ibft_tgt_rev_chap_name: 821 case ibft_tgt_rev_chap_secret: 822 if (tgt->rev_chap_name_len) 823 rc = 1; 824 break; 825 default: 826 break; 827 } 828 829 return rc; 830 } 831 832 static int __init ibft_check_initiator_for(struct ibft_initiator *init, 833 int entry) 834 { 835 int rc = 0; 836 837 switch (entry) { 838 case ibft_init_index: 839 case ibft_init_flags: 840 rc = 1; 841 break; 842 case ibft_init_isns_server: 843 if (memcmp(init->isns_server, nulls, 844 sizeof(init->isns_server))) 845 rc = 1; 846 break; 847 case ibft_init_slp_server: 848 if (memcmp(init->slp_server, nulls, 849 sizeof(init->slp_server))) 850 rc = 1; 851 break; 852 case ibft_init_pri_radius_server: 853 if (memcmp(init->pri_radius_server, nulls, 854 sizeof(init->pri_radius_server))) 855 rc = 1; 856 break; 857 case ibft_init_sec_radius_server: 858 if (memcmp(init->sec_radius_server, nulls, 859 sizeof(init->sec_radius_server))) 860 rc = 1; 861 break; 862 case ibft_init_initiator_name: 863 if (init->initiator_name_len) 864 rc = 1; 865 break; 866 default: 867 break; 868 } 869 870 return rc; 871 } 872 873 /* 874 * Register the attributes for all of the kobjects. 875 */ 876 static int __init ibft_register_attributes(struct list_head *kobject_list, 877 struct list_head *attr_list) 878 { 879 int rc = 0, i = 0; 880 struct ibft_kobject *data = NULL; 881 struct ibft_attribute *attr = NULL, *m; 882 883 list_for_each_entry(data, kobject_list, node) { 884 switch (data->hdr->id) { 885 case id_nic: 886 for (i = 0; i < ibft_eth_end_marker && !rc; i++) 887 if (ibft_check_nic_for(data->nic, i)) 888 rc = ibft_create_attribute(data, i, 889 ibft_eth_properties[i], 890 ibft_attr_show_nic, attr_list); 891 break; 892 case id_target: 893 for (i = 0; i < ibft_tgt_end_marker && !rc; i++) 894 if (ibft_check_tgt_for(data->tgt, i)) 895 rc = ibft_create_attribute(data, i, 896 ibft_tgt_properties[i], 897 ibft_attr_show_target, 898 attr_list); 899 break; 900 case id_initiator: 901 for (i = 0; i < ibft_init_end_marker && !rc; i++) 902 if (ibft_check_initiator_for( 903 data->initiator, i)) 904 rc = ibft_create_attribute(data, i, 905 ibft_initiator_properties[i], 906 ibft_attr_show_initiator, 907 attr_list); 908 break; 909 default: 910 break; 911 } 912 if (rc) 913 break; 914 } 915 list_for_each_entry_safe(attr, m, attr_list, node) { 916 rc = sysfs_create_file(attr->kobj, &attr->attr); 917 if (rc) { 918 list_del(&attr->node); 919 kfree(attr); 920 break; 921 } 922 } 923 924 return rc; 925 } 926 927 /* 928 * ibft_init() - creates sysfs tree entries for the iBFT data. 929 */ 930 static int __init ibft_init(void) 931 { 932 int rc = 0; 933 934 ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj); 935 if (!ibft_kset) 936 return -ENOMEM; 937 938 if (ibft_addr) { 939 printk(KERN_INFO "iBFT detected at 0x%llx.\n", 940 (u64)isa_virt_to_bus(ibft_addr)); 941 942 rc = ibft_check_device(); 943 if (rc) 944 goto out_firmware_unregister; 945 946 /* Scan the IBFT for data and register the kobjects. */ 947 rc = ibft_register_kobjects(ibft_addr, &ibft_kobject_list); 948 if (rc) 949 goto out_free; 950 951 /* Register the attributes */ 952 rc = ibft_register_attributes(&ibft_kobject_list, 953 &ibft_attr_list); 954 if (rc) 955 goto out_free; 956 } else 957 printk(KERN_INFO "No iBFT detected.\n"); 958 959 return 0; 960 961 out_free: 962 ibft_unregister(&ibft_attr_list, &ibft_kobject_list); 963 out_firmware_unregister: 964 kset_unregister(ibft_kset); 965 return rc; 966 } 967 968 static void __exit ibft_exit(void) 969 { 970 ibft_unregister(&ibft_attr_list, &ibft_kobject_list); 971 kset_unregister(ibft_kset); 972 } 973 974 module_init(ibft_init); 975 module_exit(ibft_exit); 976