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 int 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 = ~((1 << (32-nic->subnet_mask_prefix))-1); 401 str += sprintf(str, NIPQUAD_FMT, 402 (u8)(val >> 24), (u8)(val >> 16), 403 (u8)(val >> 8), (u8)(val)); 404 break; 405 case ibft_eth_origin: 406 str += sprintf(str, "%d\n", nic->origin); 407 break; 408 case ibft_eth_gateway: 409 str += sprintf_ipaddr(str, nic->gateway); 410 break; 411 case ibft_eth_primary_dns: 412 str += sprintf_ipaddr(str, nic->primary_dns); 413 break; 414 case ibft_eth_secondary_dns: 415 str += sprintf_ipaddr(str, nic->secondary_dns); 416 break; 417 case ibft_eth_dhcp: 418 str += sprintf_ipaddr(str, nic->dhcp); 419 break; 420 case ibft_eth_vlan: 421 str += sprintf(str, "%d\n", nic->vlan); 422 break; 423 case ibft_eth_mac: 424 mac = nic->mac; 425 str += sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x\n", 426 (u8)mac[0], (u8)mac[1], (u8)mac[2], 427 (u8)mac[3], (u8)mac[4], (u8)mac[5]); 428 break; 429 case ibft_eth_hostname: 430 str += sprintf_string(str, nic->hostname_len, 431 (char *)ibft_loc + nic->hostname_off); 432 break; 433 default: 434 break; 435 } 436 437 return str - buf; 438 }; 439 440 static ssize_t ibft_attr_show_target(struct ibft_kobject *entry, 441 struct ibft_attribute *attr, 442 char *buf) 443 { 444 struct ibft_tgt *tgt = entry->tgt; 445 void *ibft_loc = entry->header; 446 char *str = buf; 447 int i; 448 449 if (!tgt) 450 return 0; 451 452 switch (attr->type) { 453 case ibft_tgt_index: 454 str += sprintf(str, "%d\n", tgt->hdr.index); 455 break; 456 case ibft_tgt_flags: 457 str += sprintf(str, "%d\n", tgt->hdr.flags); 458 break; 459 case ibft_tgt_ip_addr: 460 str += sprintf_ipaddr(str, tgt->ip_addr); 461 break; 462 case ibft_tgt_port: 463 str += sprintf(str, "%d\n", tgt->port); 464 break; 465 case ibft_tgt_lun: 466 for (i = 0; i < 8; i++) 467 str += sprintf(str, "%x", (u8)tgt->lun[i]); 468 str += sprintf(str, "\n"); 469 break; 470 case ibft_tgt_nic_assoc: 471 str += sprintf(str, "%d\n", tgt->nic_assoc); 472 break; 473 case ibft_tgt_chap_type: 474 str += sprintf(str, "%d\n", tgt->chap_type); 475 break; 476 case ibft_tgt_name: 477 str += sprintf_string(str, tgt->tgt_name_len, 478 (char *)ibft_loc + tgt->tgt_name_off); 479 break; 480 case ibft_tgt_chap_name: 481 str += sprintf_string(str, tgt->chap_name_len, 482 (char *)ibft_loc + tgt->chap_name_off); 483 break; 484 case ibft_tgt_chap_secret: 485 str += sprintf_string(str, tgt->chap_secret_len, 486 (char *)ibft_loc + tgt->chap_secret_off); 487 break; 488 case ibft_tgt_rev_chap_name: 489 str += sprintf_string(str, tgt->rev_chap_name_len, 490 (char *)ibft_loc + 491 tgt->rev_chap_name_off); 492 break; 493 case ibft_tgt_rev_chap_secret: 494 str += sprintf_string(str, tgt->rev_chap_secret_len, 495 (char *)ibft_loc + 496 tgt->rev_chap_secret_off); 497 break; 498 default: 499 break; 500 } 501 502 return str - buf; 503 } 504 505 /* 506 * The routine called for all sysfs attributes. 507 */ 508 static ssize_t ibft_show_attribute(struct kobject *kobj, 509 struct attribute *attr, 510 char *buf) 511 { 512 struct ibft_kobject *dev = 513 container_of(kobj, struct ibft_kobject, kobj); 514 struct ibft_attribute *ibft_attr = 515 container_of(attr, struct ibft_attribute, attr); 516 ssize_t ret = -EIO; 517 char *str = buf; 518 519 if (!capable(CAP_SYS_ADMIN)) 520 return -EACCES; 521 522 if (ibft_attr->show) 523 ret = ibft_attr->show(dev, ibft_attr, str); 524 525 return ret; 526 } 527 528 static struct sysfs_ops ibft_attr_ops = { 529 .show = ibft_show_attribute, 530 }; 531 532 static struct kobj_type ibft_ktype = { 533 .release = ibft_release, 534 .sysfs_ops = &ibft_attr_ops, 535 }; 536 537 static struct kset *ibft_kset; 538 539 static int __init ibft_check_device(void) 540 { 541 int len; 542 u8 *pos; 543 u8 csum = 0; 544 545 len = ibft_addr->length; 546 547 /* Sanity checking of iBFT. */ 548 if (ibft_addr->revision != 1) { 549 printk(KERN_ERR "iBFT module supports only revision 1, " \ 550 "while this is %d.\n", ibft_addr->revision); 551 return -ENOENT; 552 } 553 for (pos = (u8 *)ibft_addr; pos < (u8 *)ibft_addr + len; pos++) 554 csum += *pos; 555 556 if (csum) { 557 printk(KERN_ERR "iBFT has incorrect checksum (0x%x)!\n", csum); 558 return -ENOENT; 559 } 560 561 return 0; 562 } 563 564 /* 565 * Helper function for ibft_register_kobjects. 566 */ 567 static int __init ibft_create_kobject(struct ibft_table_header *header, 568 struct ibft_hdr *hdr, 569 struct list_head *list) 570 { 571 struct ibft_kobject *ibft_kobj = NULL; 572 struct ibft_nic *nic = (struct ibft_nic *)hdr; 573 struct pci_dev *pci_dev; 574 int rc = 0; 575 576 ibft_kobj = kzalloc(sizeof(*ibft_kobj), GFP_KERNEL); 577 if (!ibft_kobj) 578 return -ENOMEM; 579 580 ibft_kobj->header = header; 581 ibft_kobj->hdr = hdr; 582 583 switch (hdr->id) { 584 case id_initiator: 585 rc = ibft_verify_hdr("initiator", hdr, id_initiator, 586 sizeof(*ibft_kobj->initiator)); 587 break; 588 case id_nic: 589 rc = ibft_verify_hdr("ethernet", hdr, id_nic, 590 sizeof(*ibft_kobj->nic)); 591 break; 592 case id_target: 593 rc = ibft_verify_hdr("target", hdr, id_target, 594 sizeof(*ibft_kobj->tgt)); 595 break; 596 case id_reserved: 597 case id_control: 598 case id_extensions: 599 /* Fields which we don't support. Ignore them */ 600 rc = 1; 601 break; 602 default: 603 printk(KERN_ERR "iBFT has unknown structure type (%d). " \ 604 "Report this bug to %.6s!\n", hdr->id, 605 header->oem_id); 606 rc = 1; 607 break; 608 } 609 610 if (rc) { 611 /* Skip adding this kobject, but exit with non-fatal error. */ 612 kfree(ibft_kobj); 613 goto out_invalid_struct; 614 } 615 616 ibft_kobj->kobj.kset = ibft_kset; 617 618 rc = kobject_init_and_add(&ibft_kobj->kobj, &ibft_ktype, 619 NULL, ibft_id_names[hdr->id], hdr->index); 620 621 if (rc) { 622 kfree(ibft_kobj); 623 goto out; 624 } 625 626 kobject_uevent(&ibft_kobj->kobj, KOBJ_ADD); 627 628 if (hdr->id == id_nic) { 629 /* 630 * We don't search for the device in other domains than 631 * zero. This is because on x86 platforms the BIOS 632 * executes only devices which are in domain 0. Furthermore, the 633 * iBFT spec doesn't have a domain id field :-( 634 */ 635 pci_dev = pci_get_bus_and_slot((nic->pci_bdf & 0xff00) >> 8, 636 (nic->pci_bdf & 0xff)); 637 if (pci_dev) { 638 rc = sysfs_create_link(&ibft_kobj->kobj, 639 &pci_dev->dev.kobj, "device"); 640 pci_dev_put(pci_dev); 641 } 642 } 643 644 /* Nothing broke so lets add it to the list. */ 645 list_add_tail(&ibft_kobj->node, list); 646 out: 647 return rc; 648 out_invalid_struct: 649 /* Unsupported structs are skipped. */ 650 return 0; 651 } 652 653 /* 654 * Scan the IBFT table structure for the NIC and Target fields. When 655 * found add them on the passed-in list. We do not support the other 656 * fields at this point, so they are skipped. 657 */ 658 static int __init ibft_register_kobjects(struct ibft_table_header *header, 659 struct list_head *list) 660 { 661 struct ibft_control *control = NULL; 662 void *ptr, *end; 663 int rc = 0; 664 u16 offset; 665 u16 eot_offset; 666 667 control = (void *)header + sizeof(*header); 668 end = (void *)control + control->hdr.length; 669 eot_offset = (void *)header + header->length - (void *)control; 670 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control, 671 sizeof(*control)); 672 673 /* iBFT table safety checking */ 674 rc |= ((control->hdr.index) ? -ENODEV : 0); 675 if (rc) { 676 printk(KERN_ERR "iBFT error: Control header is invalid!\n"); 677 return rc; 678 } 679 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) { 680 offset = *(u16 *)ptr; 681 if (offset && offset < header->length && offset < eot_offset) { 682 rc = ibft_create_kobject(header, 683 (void *)header + offset, 684 list); 685 if (rc) 686 break; 687 } 688 } 689 690 return rc; 691 } 692 693 static void ibft_unregister(struct list_head *attr_list, 694 struct list_head *kobj_list) 695 { 696 struct ibft_kobject *data = NULL, *n; 697 struct ibft_attribute *attr = NULL, *m; 698 699 list_for_each_entry_safe(attr, m, attr_list, node) { 700 sysfs_remove_file(attr->kobj, &attr->attr); 701 list_del(&attr->node); 702 kfree(attr); 703 }; 704 list_del_init(attr_list); 705 706 list_for_each_entry_safe(data, n, kobj_list, node) { 707 list_del(&data->node); 708 if (data->hdr->id == id_nic) 709 sysfs_remove_link(&data->kobj, "device"); 710 kobject_put(&data->kobj); 711 }; 712 list_del_init(kobj_list); 713 } 714 715 static int __init ibft_create_attribute(struct ibft_kobject *kobj_data, 716 int type, 717 const char *name, 718 ssize_t (*show)(struct ibft_kobject *, 719 struct ibft_attribute*, 720 char *buf), 721 struct list_head *list) 722 { 723 struct ibft_attribute *attr = NULL; 724 struct ibft_hdr *hdr = kobj_data->hdr; 725 726 attr = kmalloc(sizeof(*attr), GFP_KERNEL); 727 if (!attr) 728 return -ENOMEM; 729 730 attr->attr.name = name; 731 attr->attr.mode = S_IRUSR; 732 733 attr->hdr = hdr; 734 attr->show = show; 735 attr->kobj = &kobj_data->kobj; 736 attr->type = type; 737 738 list_add_tail(&attr->node, list); 739 740 return 0; 741 } 742 743 /* 744 * Helper routiners to check to determine if the entry is valid 745 * in the proper iBFT structure. 746 */ 747 static int __init ibft_check_nic_for(struct ibft_nic *nic, int entry) 748 { 749 int rc = 0; 750 751 switch (entry) { 752 case ibft_eth_index: 753 case ibft_eth_flags: 754 rc = 1; 755 break; 756 case ibft_eth_ip_addr: 757 if (memcmp(nic->ip_addr, nulls, sizeof(nic->ip_addr))) 758 rc = 1; 759 break; 760 case ibft_eth_subnet_mask: 761 if (nic->subnet_mask_prefix) 762 rc = 1; 763 break; 764 case ibft_eth_origin: 765 rc = 1; 766 break; 767 case ibft_eth_gateway: 768 if (memcmp(nic->gateway, nulls, sizeof(nic->gateway))) 769 rc = 1; 770 break; 771 case ibft_eth_primary_dns: 772 if (memcmp(nic->primary_dns, nulls, 773 sizeof(nic->primary_dns))) 774 rc = 1; 775 break; 776 case ibft_eth_secondary_dns: 777 if (memcmp(nic->secondary_dns, nulls, 778 sizeof(nic->secondary_dns))) 779 rc = 1; 780 break; 781 case ibft_eth_dhcp: 782 if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) 783 rc = 1; 784 break; 785 case ibft_eth_vlan: 786 case ibft_eth_mac: 787 rc = 1; 788 break; 789 case ibft_eth_hostname: 790 if (nic->hostname_off) 791 rc = 1; 792 break; 793 default: 794 break; 795 } 796 797 return rc; 798 } 799 800 static int __init ibft_check_tgt_for(struct ibft_tgt *tgt, int entry) 801 { 802 int rc = 0; 803 804 switch (entry) { 805 case ibft_tgt_index: 806 case ibft_tgt_flags: 807 case ibft_tgt_ip_addr: 808 case ibft_tgt_port: 809 case ibft_tgt_lun: 810 case ibft_tgt_nic_assoc: 811 case ibft_tgt_chap_type: 812 rc = 1; 813 case ibft_tgt_name: 814 if (tgt->tgt_name_len) 815 rc = 1; 816 break; 817 case ibft_tgt_chap_name: 818 case ibft_tgt_chap_secret: 819 if (tgt->chap_name_len) 820 rc = 1; 821 break; 822 case ibft_tgt_rev_chap_name: 823 case ibft_tgt_rev_chap_secret: 824 if (tgt->rev_chap_name_len) 825 rc = 1; 826 break; 827 default: 828 break; 829 } 830 831 return rc; 832 } 833 834 static int __init ibft_check_initiator_for(struct ibft_initiator *init, 835 int entry) 836 { 837 int rc = 0; 838 839 switch (entry) { 840 case ibft_init_index: 841 case ibft_init_flags: 842 rc = 1; 843 break; 844 case ibft_init_isns_server: 845 if (memcmp(init->isns_server, nulls, 846 sizeof(init->isns_server))) 847 rc = 1; 848 break; 849 case ibft_init_slp_server: 850 if (memcmp(init->slp_server, nulls, 851 sizeof(init->slp_server))) 852 rc = 1; 853 break; 854 case ibft_init_pri_radius_server: 855 if (memcmp(init->pri_radius_server, nulls, 856 sizeof(init->pri_radius_server))) 857 rc = 1; 858 break; 859 case ibft_init_sec_radius_server: 860 if (memcmp(init->sec_radius_server, nulls, 861 sizeof(init->sec_radius_server))) 862 rc = 1; 863 break; 864 case ibft_init_initiator_name: 865 if (init->initiator_name_len) 866 rc = 1; 867 break; 868 default: 869 break; 870 } 871 872 return rc; 873 } 874 875 /* 876 * Register the attributes for all of the kobjects. 877 */ 878 static int __init ibft_register_attributes(struct list_head *kobject_list, 879 struct list_head *attr_list) 880 { 881 int rc = 0, i = 0; 882 struct ibft_kobject *data = NULL; 883 struct ibft_attribute *attr = NULL, *m; 884 885 list_for_each_entry(data, kobject_list, node) { 886 switch (data->hdr->id) { 887 case id_nic: 888 for (i = 0; i < ibft_eth_end_marker && !rc; i++) 889 if (ibft_check_nic_for(data->nic, i)) 890 rc = ibft_create_attribute(data, i, 891 ibft_eth_properties[i], 892 ibft_attr_show_nic, attr_list); 893 break; 894 case id_target: 895 for (i = 0; i < ibft_tgt_end_marker && !rc; i++) 896 if (ibft_check_tgt_for(data->tgt, i)) 897 rc = ibft_create_attribute(data, i, 898 ibft_tgt_properties[i], 899 ibft_attr_show_target, 900 attr_list); 901 break; 902 case id_initiator: 903 for (i = 0; i < ibft_init_end_marker && !rc; i++) 904 if (ibft_check_initiator_for( 905 data->initiator, i)) 906 rc = ibft_create_attribute(data, i, 907 ibft_initiator_properties[i], 908 ibft_attr_show_initiator, 909 attr_list); 910 break; 911 default: 912 break; 913 } 914 if (rc) 915 break; 916 } 917 list_for_each_entry_safe(attr, m, attr_list, node) { 918 rc = sysfs_create_file(attr->kobj, &attr->attr); 919 if (rc) { 920 list_del(&attr->node); 921 kfree(attr); 922 break; 923 } 924 } 925 926 return rc; 927 } 928 929 /* 930 * ibft_init() - creates sysfs tree entries for the iBFT data. 931 */ 932 static int __init ibft_init(void) 933 { 934 int rc = 0; 935 936 ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj); 937 if (!ibft_kset) 938 return -ENOMEM; 939 940 if (ibft_addr) { 941 printk(KERN_INFO "iBFT detected at 0x%llx.\n", 942 (u64)isa_virt_to_bus(ibft_addr)); 943 944 rc = ibft_check_device(); 945 if (rc) 946 goto out_firmware_unregister; 947 948 /* Scan the IBFT for data and register the kobjects. */ 949 rc = ibft_register_kobjects(ibft_addr, &ibft_kobject_list); 950 if (rc) 951 goto out_free; 952 953 /* Register the attributes */ 954 rc = ibft_register_attributes(&ibft_kobject_list, 955 &ibft_attr_list); 956 if (rc) 957 goto out_free; 958 } else 959 printk(KERN_INFO "No iBFT detected.\n"); 960 961 return 0; 962 963 out_free: 964 ibft_unregister(&ibft_attr_list, &ibft_kobject_list); 965 out_firmware_unregister: 966 kset_unregister(ibft_kset); 967 return rc; 968 } 969 970 static void __exit ibft_exit(void) 971 { 972 ibft_unregister(&ibft_attr_list, &ibft_kobject_list); 973 kset_unregister(ibft_kset); 974 } 975 976 module_init(ibft_init); 977 module_exit(ibft_exit); 978