// 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_obj(*boot_kobj);
        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_obj(*boot_kset);
        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);