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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 | // SPDX-License-Identifier: GPL-2.0-only /* * Export the iSCSI boot info to userland via sysfs. * * Copyright (C) 2010 Red Hat, Inc. All rights reserved. * Copyright (C) 2010 Mike Christie */ #include <linux/module.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/capability.h> #include <linux/iscsi_boot_sysfs.h> MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>"); MODULE_DESCRIPTION("sysfs interface and helpers to export iSCSI boot information"); MODULE_LICENSE("GPL"); /* * The kobject and attribute structures. */ struct iscsi_boot_attr { struct attribute attr; int type; ssize_t (*show) (void *data, int type, char *buf); }; /* * The routine called for all sysfs attributes. */ static ssize_t iscsi_boot_show_attribute(struct kobject *kobj, struct attribute *attr, char *buf) { struct iscsi_boot_kobj *boot_kobj = container_of(kobj, struct iscsi_boot_kobj, kobj); struct iscsi_boot_attr *boot_attr = container_of(attr, struct iscsi_boot_attr, attr); ssize_t ret = -EIO; char *str = buf; if (!capable(CAP_SYS_ADMIN)) return -EACCES; if (boot_kobj->show) ret = boot_kobj->show(boot_kobj->data, boot_attr->type, str); return ret; } static const struct sysfs_ops iscsi_boot_attr_ops = { .show = iscsi_boot_show_attribute, }; static void iscsi_boot_kobj_release(struct kobject *kobj) { struct iscsi_boot_kobj *boot_kobj = container_of(kobj, struct iscsi_boot_kobj, kobj); if (boot_kobj->release) boot_kobj->release(boot_kobj->data); kfree(boot_kobj); } static struct kobj_type iscsi_boot_ktype = { .release = iscsi_boot_kobj_release, .sysfs_ops = &iscsi_boot_attr_ops, }; #define iscsi_boot_rd_attr(fnname, sysfs_name, attr_type) \ static struct iscsi_boot_attr iscsi_boot_attr_##fnname = { \ .attr = { .name = __stringify(sysfs_name), .mode = 0444 }, \ .type = attr_type, \ } /* Target attrs */ iscsi_boot_rd_attr(tgt_index, index, ISCSI_BOOT_TGT_INDEX); iscsi_boot_rd_attr(tgt_flags, flags, ISCSI_BOOT_TGT_FLAGS); iscsi_boot_rd_attr(tgt_ip, ip-addr, ISCSI_BOOT_TGT_IP_ADDR); iscsi_boot_rd_attr(tgt_port, port, ISCSI_BOOT_TGT_PORT); iscsi_boot_rd_attr(tgt_lun, lun, ISCSI_BOOT_TGT_LUN); iscsi_boot_rd_attr(tgt_chap, chap-type, ISCSI_BOOT_TGT_CHAP_TYPE); iscsi_boot_rd_attr(tgt_nic, nic-assoc, ISCSI_BOOT_TGT_NIC_ASSOC); iscsi_boot_rd_attr(tgt_name, target-name, ISCSI_BOOT_TGT_NAME); iscsi_boot_rd_attr(tgt_chap_name, chap-name, ISCSI_BOOT_TGT_CHAP_NAME); iscsi_boot_rd_attr(tgt_chap_secret, chap-secret, ISCSI_BOOT_TGT_CHAP_SECRET); iscsi_boot_rd_attr(tgt_chap_rev_name, rev-chap-name, ISCSI_BOOT_TGT_REV_CHAP_NAME); iscsi_boot_rd_attr(tgt_chap_rev_secret, rev-chap-name-secret, ISCSI_BOOT_TGT_REV_CHAP_SECRET); static struct attribute *target_attrs[] = { &iscsi_boot_attr_tgt_index.attr, &iscsi_boot_attr_tgt_flags.attr, &iscsi_boot_attr_tgt_ip.attr, &iscsi_boot_attr_tgt_port.attr, &iscsi_boot_attr_tgt_lun.attr, &iscsi_boot_attr_tgt_chap.attr, &iscsi_boot_attr_tgt_nic.attr, &iscsi_boot_attr_tgt_name.attr, &iscsi_boot_attr_tgt_chap_name.attr, &iscsi_boot_attr_tgt_chap_secret.attr, &iscsi_boot_attr_tgt_chap_rev_name.attr, &iscsi_boot_attr_tgt_chap_rev_secret.attr, NULL }; static umode_t iscsi_boot_tgt_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i) { struct iscsi_boot_kobj *boot_kobj = container_of(kobj, struct iscsi_boot_kobj, kobj); if (attr == &iscsi_boot_attr_tgt_index.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_INDEX); else if (attr == &iscsi_boot_attr_tgt_flags.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_FLAGS); else if (attr == &iscsi_boot_attr_tgt_ip.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_IP_ADDR); else if (attr == &iscsi_boot_attr_tgt_port.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_PORT); else if (attr == &iscsi_boot_attr_tgt_lun.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_LUN); else if (attr == &iscsi_boot_attr_tgt_chap.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_CHAP_TYPE); else if (attr == &iscsi_boot_attr_tgt_nic.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_NIC_ASSOC); else if (attr == &iscsi_boot_attr_tgt_name.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_NAME); else if (attr == &iscsi_boot_attr_tgt_chap_name.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_CHAP_NAME); else if (attr == &iscsi_boot_attr_tgt_chap_secret.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_CHAP_SECRET); else if (attr == &iscsi_boot_attr_tgt_chap_rev_name.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_REV_CHAP_NAME); else if (attr == &iscsi_boot_attr_tgt_chap_rev_secret.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_TGT_REV_CHAP_SECRET); return 0; } static struct attribute_group iscsi_boot_target_attr_group = { .attrs = target_attrs, .is_visible = iscsi_boot_tgt_attr_is_visible, }; /* Ethernet attrs */ iscsi_boot_rd_attr(eth_index, index, ISCSI_BOOT_ETH_INDEX); iscsi_boot_rd_attr(eth_flags, flags, ISCSI_BOOT_ETH_FLAGS); iscsi_boot_rd_attr(eth_ip, ip-addr, ISCSI_BOOT_ETH_IP_ADDR); iscsi_boot_rd_attr(eth_prefix, prefix-len, ISCSI_BOOT_ETH_PREFIX_LEN); iscsi_boot_rd_attr(eth_subnet, subnet-mask, ISCSI_BOOT_ETH_SUBNET_MASK); iscsi_boot_rd_attr(eth_origin, origin, ISCSI_BOOT_ETH_ORIGIN); iscsi_boot_rd_attr(eth_gateway, gateway, ISCSI_BOOT_ETH_GATEWAY); iscsi_boot_rd_attr(eth_primary_dns, primary-dns, ISCSI_BOOT_ETH_PRIMARY_DNS); iscsi_boot_rd_attr(eth_secondary_dns, secondary-dns, ISCSI_BOOT_ETH_SECONDARY_DNS); iscsi_boot_rd_attr(eth_dhcp, dhcp, ISCSI_BOOT_ETH_DHCP); iscsi_boot_rd_attr(eth_vlan, vlan, ISCSI_BOOT_ETH_VLAN); iscsi_boot_rd_attr(eth_mac, mac, ISCSI_BOOT_ETH_MAC); iscsi_boot_rd_attr(eth_hostname, hostname, ISCSI_BOOT_ETH_HOSTNAME); static struct attribute *ethernet_attrs[] = { &iscsi_boot_attr_eth_index.attr, &iscsi_boot_attr_eth_flags.attr, &iscsi_boot_attr_eth_ip.attr, &iscsi_boot_attr_eth_prefix.attr, &iscsi_boot_attr_eth_subnet.attr, &iscsi_boot_attr_eth_origin.attr, &iscsi_boot_attr_eth_gateway.attr, &iscsi_boot_attr_eth_primary_dns.attr, &iscsi_boot_attr_eth_secondary_dns.attr, &iscsi_boot_attr_eth_dhcp.attr, &iscsi_boot_attr_eth_vlan.attr, &iscsi_boot_attr_eth_mac.attr, &iscsi_boot_attr_eth_hostname.attr, NULL }; static umode_t iscsi_boot_eth_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i) { struct iscsi_boot_kobj *boot_kobj = container_of(kobj, struct iscsi_boot_kobj, kobj); if (attr == &iscsi_boot_attr_eth_index.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_INDEX); else if (attr == &iscsi_boot_attr_eth_flags.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_FLAGS); else if (attr == &iscsi_boot_attr_eth_ip.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_IP_ADDR); else if (attr == &iscsi_boot_attr_eth_prefix.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_PREFIX_LEN); else if (attr == &iscsi_boot_attr_eth_subnet.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_SUBNET_MASK); else if (attr == &iscsi_boot_attr_eth_origin.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_ORIGIN); else if (attr == &iscsi_boot_attr_eth_gateway.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_GATEWAY); else if (attr == &iscsi_boot_attr_eth_primary_dns.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_PRIMARY_DNS); else if (attr == &iscsi_boot_attr_eth_secondary_dns.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_SECONDARY_DNS); else if (attr == &iscsi_boot_attr_eth_dhcp.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_DHCP); else if (attr == &iscsi_boot_attr_eth_vlan.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_VLAN); else if (attr == &iscsi_boot_attr_eth_mac.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_MAC); else if (attr == &iscsi_boot_attr_eth_hostname.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ETH_HOSTNAME); return 0; } static struct attribute_group iscsi_boot_ethernet_attr_group = { .attrs = ethernet_attrs, .is_visible = iscsi_boot_eth_attr_is_visible, }; /* Initiator attrs */ iscsi_boot_rd_attr(ini_index, index, ISCSI_BOOT_INI_INDEX); iscsi_boot_rd_attr(ini_flags, flags, ISCSI_BOOT_INI_FLAGS); iscsi_boot_rd_attr(ini_isns, isns-server, ISCSI_BOOT_INI_ISNS_SERVER); iscsi_boot_rd_attr(ini_slp, slp-server, ISCSI_BOOT_INI_SLP_SERVER); iscsi_boot_rd_attr(ini_primary_radius, pri-radius-server, ISCSI_BOOT_INI_PRI_RADIUS_SERVER); iscsi_boot_rd_attr(ini_secondary_radius, sec-radius-server, ISCSI_BOOT_INI_SEC_RADIUS_SERVER); iscsi_boot_rd_attr(ini_name, initiator-name, ISCSI_BOOT_INI_INITIATOR_NAME); static struct attribute *initiator_attrs[] = { &iscsi_boot_attr_ini_index.attr, &iscsi_boot_attr_ini_flags.attr, &iscsi_boot_attr_ini_isns.attr, &iscsi_boot_attr_ini_slp.attr, &iscsi_boot_attr_ini_primary_radius.attr, &iscsi_boot_attr_ini_secondary_radius.attr, &iscsi_boot_attr_ini_name.attr, NULL }; static umode_t iscsi_boot_ini_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i) { struct iscsi_boot_kobj *boot_kobj = container_of(kobj, struct iscsi_boot_kobj, kobj); if (attr == &iscsi_boot_attr_ini_index.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_INI_INDEX); if (attr == &iscsi_boot_attr_ini_flags.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_INI_FLAGS); if (attr == &iscsi_boot_attr_ini_isns.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_INI_ISNS_SERVER); if (attr == &iscsi_boot_attr_ini_slp.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_INI_SLP_SERVER); if (attr == &iscsi_boot_attr_ini_primary_radius.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_INI_PRI_RADIUS_SERVER); if (attr == &iscsi_boot_attr_ini_secondary_radius.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_INI_SEC_RADIUS_SERVER); if (attr == &iscsi_boot_attr_ini_name.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_INI_INITIATOR_NAME); return 0; } static struct attribute_group iscsi_boot_initiator_attr_group = { .attrs = initiator_attrs, .is_visible = iscsi_boot_ini_attr_is_visible, }; /* iBFT ACPI Table attributes */ iscsi_boot_rd_attr(acpitbl_signature, signature, ISCSI_BOOT_ACPITBL_SIGNATURE); iscsi_boot_rd_attr(acpitbl_oem_id, oem_id, ISCSI_BOOT_ACPITBL_OEM_ID); iscsi_boot_rd_attr(acpitbl_oem_table_id, oem_table_id, ISCSI_BOOT_ACPITBL_OEM_TABLE_ID); static struct attribute *acpitbl_attrs[] = { &iscsi_boot_attr_acpitbl_signature.attr, &iscsi_boot_attr_acpitbl_oem_id.attr, &iscsi_boot_attr_acpitbl_oem_table_id.attr, NULL }; static umode_t iscsi_boot_acpitbl_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i) { struct iscsi_boot_kobj *boot_kobj = container_of(kobj, struct iscsi_boot_kobj, kobj); if (attr == &iscsi_boot_attr_acpitbl_signature.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ACPITBL_SIGNATURE); if (attr == &iscsi_boot_attr_acpitbl_oem_id.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ACPITBL_OEM_ID); if (attr == &iscsi_boot_attr_acpitbl_oem_table_id.attr) return boot_kobj->is_visible(boot_kobj->data, ISCSI_BOOT_ACPITBL_OEM_TABLE_ID); return 0; } static struct attribute_group iscsi_boot_acpitbl_attr_group = { .attrs = acpitbl_attrs, .is_visible = iscsi_boot_acpitbl_attr_is_visible, }; static struct iscsi_boot_kobj * iscsi_boot_create_kobj(struct iscsi_boot_kset *boot_kset, struct attribute_group *attr_group, const char *name, int index, void *data, ssize_t (*show) (void *data, int type, char *buf), umode_t (*is_visible) (void *data, int type), void (*release) (void *data)) { struct iscsi_boot_kobj *boot_kobj; boot_kobj = kzalloc(sizeof(*boot_kobj), GFP_KERNEL); if (!boot_kobj) return NULL; INIT_LIST_HEAD(&boot_kobj->list); boot_kobj->kobj.kset = boot_kset->kset; if (kobject_init_and_add(&boot_kobj->kobj, &iscsi_boot_ktype, NULL, name, index)) { kobject_put(&boot_kobj->kobj); return NULL; } boot_kobj->data = data; boot_kobj->show = show; boot_kobj->is_visible = is_visible; boot_kobj->release = release; if (sysfs_create_group(&boot_kobj->kobj, attr_group)) { /* * We do not want to free this because the caller * will assume that since the creation call failed * the boot kobj was not setup and the normal release * path is not being run. */ boot_kobj->release = NULL; kobject_put(&boot_kobj->kobj); return NULL; } boot_kobj->attr_group = attr_group; kobject_uevent(&boot_kobj->kobj, KOBJ_ADD); /* Nothing broke so lets add it to the list. */ list_add_tail(&boot_kobj->list, &boot_kset->kobj_list); return boot_kobj; } static void iscsi_boot_remove_kobj(struct iscsi_boot_kobj *boot_kobj) { list_del(&boot_kobj->list); sysfs_remove_group(&boot_kobj->kobj, boot_kobj->attr_group); kobject_put(&boot_kobj->kobj); } /** * iscsi_boot_create_target() - create boot target sysfs dir * @boot_kset: boot kset * @index: the target id * @data: driver specific data for target * @show: attr show function * @is_visible: attr visibility function * @release: release function * * Note: The boot sysfs lib will free the data passed in for the caller * when all refs to the target kobject have been released. */ struct iscsi_boot_kobj * iscsi_boot_create_target(struct iscsi_boot_kset *boot_kset, int index, void *data, ssize_t (*show) (void *data, int type, char *buf), umode_t (*is_visible) (void *data, int type), void (*release) (void *data)) { return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_target_attr_group, "target%d", index, data, show, is_visible, release); } EXPORT_SYMBOL_GPL(iscsi_boot_create_target); /** * iscsi_boot_create_initiator() - create boot initiator sysfs dir * @boot_kset: boot kset * @index: the initiator id * @data: driver specific data * @show: attr show function * @is_visible: attr visibility function * @release: release function * * Note: The boot sysfs lib will free the data passed in for the caller * when all refs to the initiator kobject have been released. */ struct iscsi_boot_kobj * iscsi_boot_create_initiator(struct iscsi_boot_kset *boot_kset, int index, void *data, ssize_t (*show) (void *data, int type, char *buf), umode_t (*is_visible) (void *data, int type), void (*release) (void *data)) { return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_initiator_attr_group, "initiator", index, data, show, is_visible, release); } EXPORT_SYMBOL_GPL(iscsi_boot_create_initiator); /** * iscsi_boot_create_ethernet() - create boot ethernet sysfs dir * @boot_kset: boot kset * @index: the ethernet device id * @data: driver specific data * @show: attr show function * @is_visible: attr visibility function * @release: release function * * Note: The boot sysfs lib will free the data passed in for the caller * when all refs to the ethernet kobject have been released. */ struct iscsi_boot_kobj * iscsi_boot_create_ethernet(struct iscsi_boot_kset *boot_kset, int index, void *data, ssize_t (*show) (void *data, int type, char *buf), umode_t (*is_visible) (void *data, int type), void (*release) (void *data)) { return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_ethernet_attr_group, "ethernet%d", index, data, show, is_visible, release); } EXPORT_SYMBOL_GPL(iscsi_boot_create_ethernet); /** * iscsi_boot_create_acpitbl() - create boot acpi table sysfs dir * @boot_kset: boot kset * @index: not used * @data: driver specific data * @show: attr show function * @is_visible: attr visibility function * @release: release function * * Note: The boot sysfs lib will free the data passed in for the caller * when all refs to the acpitbl kobject have been released. */ struct iscsi_boot_kobj * iscsi_boot_create_acpitbl(struct iscsi_boot_kset *boot_kset, int index, void *data, ssize_t (*show)(void *data, int type, char *buf), umode_t (*is_visible)(void *data, int type), void (*release)(void *data)) { return iscsi_boot_create_kobj(boot_kset, &iscsi_boot_acpitbl_attr_group, "acpi_header", index, data, show, is_visible, release); } EXPORT_SYMBOL_GPL(iscsi_boot_create_acpitbl); /** * iscsi_boot_create_kset() - creates root sysfs tree * @set_name: name of root dir */ struct iscsi_boot_kset *iscsi_boot_create_kset(const char *set_name) { struct iscsi_boot_kset *boot_kset; boot_kset = kzalloc(sizeof(*boot_kset), GFP_KERNEL); if (!boot_kset) return NULL; boot_kset->kset = kset_create_and_add(set_name, NULL, firmware_kobj); if (!boot_kset->kset) { kfree(boot_kset); return NULL; } INIT_LIST_HEAD(&boot_kset->kobj_list); return boot_kset; } EXPORT_SYMBOL_GPL(iscsi_boot_create_kset); /** * iscsi_boot_create_host_kset() - creates root sysfs tree for a scsi host * @hostno: host number of scsi host */ struct iscsi_boot_kset *iscsi_boot_create_host_kset(unsigned int hostno) { struct iscsi_boot_kset *boot_kset; char *set_name; set_name = kasprintf(GFP_KERNEL, "iscsi_boot%u", hostno); if (!set_name) return NULL; boot_kset = iscsi_boot_create_kset(set_name); kfree(set_name); return boot_kset; } EXPORT_SYMBOL_GPL(iscsi_boot_create_host_kset); /** * iscsi_boot_destroy_kset() - destroy kset and kobjects under it * @boot_kset: boot kset * * This will remove the kset and kobjects and attrs under it. */ void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset) { struct iscsi_boot_kobj *boot_kobj, *tmp_kobj; if (!boot_kset) return; list_for_each_entry_safe(boot_kobj, tmp_kobj, &boot_kset->kobj_list, list) iscsi_boot_remove_kobj(boot_kobj); kset_unregister(boot_kset->kset); kfree(boot_kset); } EXPORT_SYMBOL_GPL(iscsi_boot_destroy_kset); |