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, 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 } 300 301 static 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 */ 309 static 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 } 326 327 static 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 */ 337 ssize_t ibft_attr_show_initiator(struct ibft_kobject *entry, 338 struct ibft_attribute *attr, 339 char *buf) 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 } 378 379 ssize_t ibft_attr_show_nic(struct ibft_kobject *entry, 380 struct ibft_attribute *attr, 381 char *buf) 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 }; 442 443 ssize_t ibft_attr_show_target(struct ibft_kobject *entry, 444 struct ibft_attribute *attr, 445 char *buf) 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 */ 511 static 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 } 530 531 static struct sysfs_ops ibft_attr_ops = { 532 .show = ibft_show_attribute, 533 }; 534 535 static struct kobj_type ibft_ktype = { 536 .release = ibft_release, 537 .sysfs_ops = &ibft_attr_ops, 538 }; 539 540 static struct kset *ibft_kset; 541 542 static 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 */ 570 static 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); 649 out: 650 return rc; 651 out_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 */ 661 static 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; 672 eot_offset = (void *)header + header->length - 673 (void *)control - sizeof(*header); 674 rc = ibft_verify_hdr("control", (struct ibft_hdr *)control, id_control, 675 sizeof(*control)); 676 677 /* iBFT table safety checking */ 678 rc |= ((control->hdr.index) ? -ENODEV : 0); 679 if (rc) { 680 printk(KERN_ERR "iBFT error: Control header is invalid!\n"); 681 return rc; 682 } 683 for (ptr = &control->initiator_off; ptr < end; ptr += sizeof(u16)) { 684 offset = *(u16 *)ptr; 685 if (offset && offset < header->length && offset < eot_offset) { 686 rc = ibft_create_kobject(header, 687 (void *)header + offset, 688 list); 689 if (rc) 690 break; 691 } 692 } 693 694 return rc; 695 } 696 697 static void ibft_unregister(struct list_head *attr_list, 698 struct list_head *kobj_list) 699 { 700 struct ibft_kobject *data = NULL, *n; 701 struct ibft_attribute *attr = NULL, *m; 702 703 list_for_each_entry_safe(attr, m, attr_list, node) { 704 sysfs_remove_file(attr->kobj, &attr->attr); 705 list_del(&attr->node); 706 kfree(attr); 707 }; 708 list_del_init(attr_list); 709 710 list_for_each_entry_safe(data, n, kobj_list, node) { 711 list_del(&data->node); 712 if (data->hdr->id == id_nic) 713 sysfs_remove_link(&data->kobj, "device"); 714 kobject_put(&data->kobj); 715 }; 716 list_del_init(kobj_list); 717 } 718 719 static int __init ibft_create_attribute(struct ibft_kobject *kobj_data, 720 int type, 721 const char *name, 722 ssize_t (*show)(struct ibft_kobject *, 723 struct ibft_attribute*, 724 char *buf), 725 struct list_head *list) 726 { 727 struct ibft_attribute *attr = NULL; 728 struct ibft_hdr *hdr = kobj_data->hdr; 729 730 attr = kmalloc(sizeof(*attr), GFP_KERNEL); 731 if (!attr) 732 return -ENOMEM; 733 734 attr->attr.name = name; 735 attr->attr.mode = S_IRUSR; 736 attr->attr.owner = THIS_MODULE; 737 738 attr->hdr = hdr; 739 attr->show = show; 740 attr->kobj = &kobj_data->kobj; 741 attr->type = type; 742 743 list_add_tail(&attr->node, list); 744 745 return 0; 746 } 747 748 /* 749 * Helper routiners to check to determine if the entry is valid 750 * in the proper iBFT structure. 751 */ 752 static int __init ibft_check_nic_for(struct ibft_nic *nic, int entry) 753 { 754 int rc = 0; 755 756 switch (entry) { 757 case ibft_eth_index: 758 case ibft_eth_flags: 759 rc = 1; 760 break; 761 case ibft_eth_ip_addr: 762 if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) 763 rc = 1; 764 break; 765 case ibft_eth_subnet_mask: 766 if (!memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) 767 rc = 1; 768 break; 769 case ibft_eth_origin: 770 rc = 1; 771 break; 772 case ibft_eth_gateway: 773 if (memcmp(nic->gateway, nulls, sizeof(nic->gateway))) 774 rc = 1; 775 break; 776 case ibft_eth_primary_dns: 777 if (memcmp(nic->primary_dns, nulls, 778 sizeof(nic->primary_dns))) 779 rc = 1; 780 break; 781 case ibft_eth_secondary_dns: 782 if (memcmp(nic->secondary_dns, nulls, 783 sizeof(nic->secondary_dns))) 784 rc = 1; 785 break; 786 case ibft_eth_dhcp: 787 if (memcmp(nic->dhcp, nulls, sizeof(nic->dhcp))) 788 rc = 1; 789 break; 790 case ibft_eth_vlan: 791 case ibft_eth_mac: 792 rc = 1; 793 break; 794 case ibft_eth_hostname: 795 if (nic->hostname_off) 796 rc = 1; 797 break; 798 default: 799 break; 800 } 801 802 return rc; 803 } 804 805 static int __init ibft_check_tgt_for(struct ibft_tgt *tgt, int entry) 806 { 807 int rc = 0; 808 809 switch (entry) { 810 case ibft_tgt_index: 811 case ibft_tgt_flags: 812 case ibft_tgt_ip_addr: 813 case ibft_tgt_port: 814 case ibft_tgt_lun: 815 case ibft_tgt_nic_assoc: 816 case ibft_tgt_chap_type: 817 rc = 1; 818 case ibft_tgt_name: 819 if (tgt->tgt_name_len) 820 rc = 1; 821 break; 822 case ibft_tgt_chap_name: 823 case ibft_tgt_chap_secret: 824 if (tgt->chap_name_len) 825 rc = 1; 826 break; 827 case ibft_tgt_rev_chap_name: 828 case ibft_tgt_rev_chap_secret: 829 if (tgt->rev_chap_name_len) 830 rc = 1; 831 break; 832 default: 833 break; 834 } 835 836 return rc; 837 } 838 839 static int __init ibft_check_initiator_for(struct ibft_initiator *init, 840 int entry) 841 { 842 int rc = 0; 843 844 switch (entry) { 845 case ibft_init_index: 846 case ibft_init_flags: 847 rc = 1; 848 break; 849 case ibft_init_isns_server: 850 if (memcmp(init->isns_server, nulls, 851 sizeof(init->isns_server))) 852 rc = 1; 853 break; 854 case ibft_init_slp_server: 855 if (memcmp(init->slp_server, nulls, 856 sizeof(init->slp_server))) 857 rc = 1; 858 break; 859 case ibft_init_pri_radius_server: 860 if (memcmp(init->pri_radius_server, nulls, 861 sizeof(init->pri_radius_server))) 862 rc = 1; 863 break; 864 case ibft_init_sec_radius_server: 865 if (memcmp(init->sec_radius_server, nulls, 866 sizeof(init->sec_radius_server))) 867 rc = 1; 868 break; 869 case ibft_init_initiator_name: 870 if (init->initiator_name_len) 871 rc = 1; 872 break; 873 default: 874 break; 875 } 876 877 return rc; 878 } 879 880 /* 881 * Register the attributes for all of the kobjects. 882 */ 883 static int __init ibft_register_attributes(struct list_head *kobject_list, 884 struct list_head *attr_list) 885 { 886 int rc = 0, i = 0; 887 struct ibft_kobject *data = NULL; 888 struct ibft_attribute *attr = NULL, *m; 889 890 list_for_each_entry(data, kobject_list, node) { 891 switch (data->hdr->id) { 892 case id_nic: 893 for (i = 0; i < ibft_eth_end_marker && !rc; i++) 894 if (ibft_check_nic_for(data->nic, i)) 895 rc = ibft_create_attribute(data, i, 896 ibft_eth_properties[i], 897 ibft_attr_show_nic, attr_list); 898 break; 899 case id_target: 900 for (i = 0; i < ibft_tgt_end_marker && !rc; i++) 901 if (ibft_check_tgt_for(data->tgt, i)) 902 rc = ibft_create_attribute(data, i, 903 ibft_tgt_properties[i], 904 ibft_attr_show_target, 905 attr_list); 906 break; 907 case id_initiator: 908 for (i = 0; i < ibft_init_end_marker && !rc; i++) 909 if (ibft_check_initiator_for( 910 data->initiator, i)) 911 rc = ibft_create_attribute(data, i, 912 ibft_initiator_properties[i], 913 ibft_attr_show_initiator, 914 attr_list); 915 break; 916 default: 917 break; 918 } 919 if (rc) 920 break; 921 } 922 list_for_each_entry_safe(attr, m, attr_list, node) { 923 rc = sysfs_create_file(attr->kobj, &attr->attr); 924 if (rc) { 925 list_del(&attr->node); 926 kfree(attr); 927 break; 928 } 929 } 930 931 return rc; 932 } 933 934 /* 935 * ibft_init() - creates sysfs tree entries for the iBFT data. 936 */ 937 static int __init ibft_init(void) 938 { 939 int rc = 0; 940 941 ibft_kset = kset_create_and_add("ibft", NULL, firmware_kobj); 942 if (!ibft_kset) 943 return -ENOMEM; 944 945 if (ibft_addr) { 946 printk(KERN_INFO "iBFT detected at 0x%lx.\n", 947 virt_to_phys((void *)ibft_addr)); 948 949 rc = ibft_check_device(); 950 if (rc) 951 goto out_firmware_unregister; 952 953 /* Scan the IBFT for data and register the kobjects. */ 954 rc = ibft_register_kobjects(ibft_addr, &ibft_kobject_list); 955 if (rc) 956 goto out_free; 957 958 /* Register the attributes */ 959 rc = ibft_register_attributes(&ibft_kobject_list, 960 &ibft_attr_list); 961 if (rc) 962 goto out_free; 963 } else 964 printk(KERN_INFO "No iBFT detected.\n"); 965 966 return 0; 967 968 out_free: 969 ibft_unregister(&ibft_attr_list, &ibft_kobject_list); 970 out_firmware_unregister: 971 kset_unregister(ibft_kset); 972 return rc; 973 } 974 975 static void __exit ibft_exit(void) 976 { 977 ibft_unregister(&ibft_attr_list, &ibft_kobject_list); 978 kset_unregister(ibft_kset); 979 } 980 981 module_init(ibft_init); 982 module_exit(ibft_exit); 983