--- /dev/null
+/*
+ * Export the iSCSI boot info to userland via sysfs.
+ *
+ * Copyright (C) 2010 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2010 Mike Christie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License v2.0 as published by
+ * the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#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_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_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_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,
+};
+
+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)) {
+ kfree(boot_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_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);
Code Review / kvmfornfv.git / blobdiff