--- /dev/null
+/*******************************************************************************
+ * Filename: target_core_configfs.c
+ *
+ * This file contains ConfigFS logic for the Generic Target Engine project.
+ *
+ * (c) Copyright 2008-2013 Datera, Inc.
+ *
+ * Nicholas A. Bellinger <nab@kernel.org>
+ *
+ * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/moduleparam.h>
+#include <generated/utsrelease.h>
+#include <linux/utsname.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/parser.h>
+#include <linux/syscalls.h>
+#include <linux/configfs.h>
+#include <linux/spinlock.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_backend.h>
+#include <target/target_core_fabric.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_internal.h"
+#include "target_core_alua.h"
+#include "target_core_pr.h"
+#include "target_core_rd.h"
+#include "target_core_xcopy.h"
+
+#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
+static void target_core_setup_##_name##_cit(struct se_subsystem_api *sa) \
+{ \
+ struct target_backend_cits *tbc = &sa->tb_cits; \
+ struct config_item_type *cit = &tbc->tb_##_name##_cit; \
+ \
+ cit->ct_item_ops = _item_ops; \
+ cit->ct_group_ops = _group_ops; \
+ cit->ct_attrs = _attrs; \
+ cit->ct_owner = sa->owner; \
+ pr_debug("Setup generic %s\n", __stringify(_name)); \
+}
+
+extern struct t10_alua_lu_gp *default_lu_gp;
+
+static LIST_HEAD(g_tf_list);
+static DEFINE_MUTEX(g_tf_lock);
+
+struct target_core_configfs_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(void *, char *);
+ ssize_t (*store)(void *, const char *, size_t);
+};
+
+static struct config_group target_core_hbagroup;
+static struct config_group alua_group;
+static struct config_group alua_lu_gps_group;
+
+static inline struct se_hba *
+item_to_hba(struct config_item *item)
+{
+ return container_of(to_config_group(item), struct se_hba, hba_group);
+}
+
+/*
+ * Attributes for /sys/kernel/config/target/
+ */
+static ssize_t target_core_attr_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
+ " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
+ utsname()->sysname, utsname()->machine);
+}
+
+static struct configfs_item_operations target_core_fabric_item_ops = {
+ .show_attribute = target_core_attr_show,
+};
+
+static struct configfs_attribute target_core_item_attr_version = {
+ .ca_owner = THIS_MODULE,
+ .ca_name = "version",
+ .ca_mode = S_IRUGO,
+};
+
+static struct target_fabric_configfs *target_core_get_fabric(
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+
+ if (!name)
+ return NULL;
+
+ mutex_lock(&g_tf_lock);
+ list_for_each_entry(tf, &g_tf_list, tf_list) {
+ if (!strcmp(tf->tf_name, name)) {
+ atomic_inc(&tf->tf_access_cnt);
+ mutex_unlock(&g_tf_lock);
+ return tf;
+ }
+ }
+ mutex_unlock(&g_tf_lock);
+
+ return NULL;
+}
+
+/*
+ * Called from struct target_core_group_ops->make_group()
+ */
+static struct config_group *target_core_register_fabric(
+ struct config_group *group,
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+ int ret;
+
+ pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
+ " %s\n", group, name);
+
+ tf = target_core_get_fabric(name);
+ if (!tf) {
+ pr_debug("target_core_register_fabric() trying autoload for %s\n",
+ name);
+
+ /*
+ * Below are some hardcoded request_module() calls to automatically
+ * local fabric modules when the following is called:
+ *
+ * mkdir -p /sys/kernel/config/target/$MODULE_NAME
+ *
+ * Note that this does not limit which TCM fabric module can be
+ * registered, but simply provids auto loading logic for modules with
+ * mkdir(2) system calls with known TCM fabric modules.
+ */
+
+ if (!strncmp(name, "iscsi", 5)) {
+ /*
+ * Automatically load the LIO Target fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/iscsi
+ */
+ ret = request_module("iscsi_target_mod");
+ if (ret < 0) {
+ pr_debug("request_module() failed for"
+ " iscsi_target_mod.ko: %d\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ } else if (!strncmp(name, "loopback", 8)) {
+ /*
+ * Automatically load the tcm_loop fabric module when the
+ * following is called:
+ *
+ * mkdir -p $CONFIGFS/target/loopback
+ */
+ ret = request_module("tcm_loop");
+ if (ret < 0) {
+ pr_debug("request_module() failed for"
+ " tcm_loop.ko: %d\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ tf = target_core_get_fabric(name);
+ }
+
+ if (!tf) {
+ pr_debug("target_core_get_fabric() failed for %s\n",
+ name);
+ return ERR_PTR(-EINVAL);
+ }
+ pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
+ " %s\n", tf->tf_name);
+ /*
+ * On a successful target_core_get_fabric() look, the returned
+ * struct target_fabric_configfs *tf will contain a usage reference.
+ */
+ pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
+ &tf->tf_cit_tmpl.tfc_wwn_cit);
+
+ tf->tf_group.default_groups = tf->tf_default_groups;
+ tf->tf_group.default_groups[0] = &tf->tf_disc_group;
+ tf->tf_group.default_groups[1] = NULL;
+
+ config_group_init_type_name(&tf->tf_group, name,
+ &tf->tf_cit_tmpl.tfc_wwn_cit);
+ config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
+ &tf->tf_cit_tmpl.tfc_discovery_cit);
+
+ pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
+ " %s\n", tf->tf_group.cg_item.ci_name);
+ tf->tf_fabric = &tf->tf_group.cg_item;
+ pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
+ " for %s\n", name);
+
+ return &tf->tf_group;
+}
+
+/*
+ * Called from struct target_core_group_ops->drop_item()
+ */
+static void target_core_deregister_fabric(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct target_fabric_configfs *tf = container_of(
+ to_config_group(item), struct target_fabric_configfs, tf_group);
+ struct config_group *tf_group;
+ struct config_item *df_item;
+ int i;
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
+ " tf list\n", config_item_name(item));
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
+ " %s\n", tf->tf_name);
+ atomic_dec(&tf->tf_access_cnt);
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
+ " tf->tf_fabric for %s\n", tf->tf_name);
+ tf->tf_fabric = NULL;
+
+ pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
+ " %s\n", config_item_name(item));
+
+ tf_group = &tf->tf_group;
+ for (i = 0; tf_group->default_groups[i]; i++) {
+ df_item = &tf_group->default_groups[i]->cg_item;
+ tf_group->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_fabric_group_ops = {
+ .make_group = &target_core_register_fabric,
+ .drop_item = &target_core_deregister_fabric,
+};
+
+/*
+ * All item attributes appearing in /sys/kernel/target/ appear here.
+ */
+static struct configfs_attribute *target_core_fabric_item_attrs[] = {
+ &target_core_item_attr_version,
+ NULL,
+};
+
+/*
+ * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
+ */
+static struct config_item_type target_core_fabrics_item = {
+ .ct_item_ops = &target_core_fabric_item_ops,
+ .ct_group_ops = &target_core_fabric_group_ops,
+ .ct_attrs = target_core_fabric_item_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct configfs_subsystem target_core_fabrics = {
+ .su_group = {
+ .cg_item = {
+ .ci_namebuf = "target",
+ .ci_type = &target_core_fabrics_item,
+ },
+ },
+};
+
+int target_depend_item(struct config_item *item)
+{
+ return configfs_depend_item(&target_core_fabrics, item);
+}
+EXPORT_SYMBOL(target_depend_item);
+
+void target_undepend_item(struct config_item *item)
+{
+ return configfs_undepend_item(&target_core_fabrics, item);
+}
+EXPORT_SYMBOL(target_undepend_item);
+
+/*##############################################################################
+// Start functions called by external Target Fabrics Modules
+//############################################################################*/
+
+static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
+{
+ if (!tfo->name) {
+ pr_err("Missing tfo->name\n");
+ return -EINVAL;
+ }
+ if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
+ pr_err("Passed name: %s exceeds TARGET_FABRIC"
+ "_NAME_SIZE\n", tfo->name);
+ return -EINVAL;
+ }
+ if (!tfo->get_fabric_name) {
+ pr_err("Missing tfo->get_fabric_name()\n");
+ return -EINVAL;
+ }
+ if (!tfo->get_fabric_proto_ident) {
+ pr_err("Missing tfo->get_fabric_proto_ident()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_wwn) {
+ pr_err("Missing tfo->tpg_get_wwn()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_tag) {
+ pr_err("Missing tfo->tpg_get_tag()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_default_depth) {
+ pr_err("Missing tfo->tpg_get_default_depth()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_pr_transport_id) {
+ pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_pr_transport_id_len) {
+ pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_demo_mode) {
+ pr_err("Missing tfo->tpg_check_demo_mode()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_demo_mode_cache) {
+ pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_demo_mode_write_protect) {
+ pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_check_prod_mode_write_protect) {
+ pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_alloc_fabric_acl) {
+ pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_release_fabric_acl) {
+ pr_err("Missing tfo->tpg_release_fabric_acl()\n");
+ return -EINVAL;
+ }
+ if (!tfo->tpg_get_inst_index) {
+ pr_err("Missing tfo->tpg_get_inst_index()\n");
+ return -EINVAL;
+ }
+ if (!tfo->release_cmd) {
+ pr_err("Missing tfo->release_cmd()\n");
+ return -EINVAL;
+ }
+ if (!tfo->shutdown_session) {
+ pr_err("Missing tfo->shutdown_session()\n");
+ return -EINVAL;
+ }
+ if (!tfo->close_session) {
+ pr_err("Missing tfo->close_session()\n");
+ return -EINVAL;
+ }
+ if (!tfo->sess_get_index) {
+ pr_err("Missing tfo->sess_get_index()\n");
+ return -EINVAL;
+ }
+ if (!tfo->write_pending) {
+ pr_err("Missing tfo->write_pending()\n");
+ return -EINVAL;
+ }
+ if (!tfo->write_pending_status) {
+ pr_err("Missing tfo->write_pending_status()\n");
+ return -EINVAL;
+ }
+ if (!tfo->set_default_node_attributes) {
+ pr_err("Missing tfo->set_default_node_attributes()\n");
+ return -EINVAL;
+ }
+ if (!tfo->get_task_tag) {
+ pr_err("Missing tfo->get_task_tag()\n");
+ return -EINVAL;
+ }
+ if (!tfo->get_cmd_state) {
+ pr_err("Missing tfo->get_cmd_state()\n");
+ return -EINVAL;
+ }
+ if (!tfo->queue_data_in) {
+ pr_err("Missing tfo->queue_data_in()\n");
+ return -EINVAL;
+ }
+ if (!tfo->queue_status) {
+ pr_err("Missing tfo->queue_status()\n");
+ return -EINVAL;
+ }
+ if (!tfo->queue_tm_rsp) {
+ pr_err("Missing tfo->queue_tm_rsp()\n");
+ return -EINVAL;
+ }
+ if (!tfo->aborted_task) {
+ pr_err("Missing tfo->aborted_task()\n");
+ return -EINVAL;
+ }
+ /*
+ * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
+ * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
+ * target_core_fabric_configfs.c WWN+TPG group context code.
+ */
+ if (!tfo->fabric_make_wwn) {
+ pr_err("Missing tfo->fabric_make_wwn()\n");
+ return -EINVAL;
+ }
+ if (!tfo->fabric_drop_wwn) {
+ pr_err("Missing tfo->fabric_drop_wwn()\n");
+ return -EINVAL;
+ }
+ if (!tfo->fabric_make_tpg) {
+ pr_err("Missing tfo->fabric_make_tpg()\n");
+ return -EINVAL;
+ }
+ if (!tfo->fabric_drop_tpg) {
+ pr_err("Missing tfo->fabric_drop_tpg()\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int target_register_template(const struct target_core_fabric_ops *fo)
+{
+ struct target_fabric_configfs *tf;
+ int ret;
+
+ ret = target_fabric_tf_ops_check(fo);
+ if (ret)
+ return ret;
+
+ tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
+ if (!tf) {
+ pr_err("%s: could not allocate memory!\n", __func__);
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&tf->tf_list);
+ atomic_set(&tf->tf_access_cnt, 0);
+
+ /*
+ * Setup the default generic struct config_item_type's (cits) in
+ * struct target_fabric_configfs->tf_cit_tmpl
+ */
+ tf->tf_module = fo->module;
+ snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", fo->name);
+
+ tf->tf_ops = *fo;
+ target_fabric_setup_cits(tf);
+
+ mutex_lock(&g_tf_lock);
+ list_add_tail(&tf->tf_list, &g_tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(target_register_template);
+
+void target_unregister_template(const struct target_core_fabric_ops *fo)
+{
+ struct target_fabric_configfs *t;
+
+ mutex_lock(&g_tf_lock);
+ list_for_each_entry(t, &g_tf_list, tf_list) {
+ if (!strcmp(t->tf_name, fo->name)) {
+ BUG_ON(atomic_read(&t->tf_access_cnt));
+ list_del(&t->tf_list);
+ kfree(t);
+ break;
+ }
+ }
+ mutex_unlock(&g_tf_lock);
+}
+EXPORT_SYMBOL(target_unregister_template);
+
+/*##############################################################################
+// Stop functions called by external Target Fabrics Modules
+//############################################################################*/
+
+/* Start functions for struct config_item_type tb_dev_attrib_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
+CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
+
+static struct configfs_item_operations target_core_dev_attrib_ops = {
+ .show_attribute = target_core_dev_attrib_attr_show,
+ .store_attribute = target_core_dev_attrib_attr_store,
+};
+
+TB_CIT_SETUP(dev_attrib, &target_core_dev_attrib_ops, NULL, NULL);
+
+/* End functions for struct config_item_type tb_dev_attrib_cit */
+
+/* Start functions for struct config_item_type tb_dev_wwn_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
+#define SE_DEV_WWN_ATTR(_name, _mode) \
+static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_wwn_show_attr_##_name, \
+ target_core_dev_wwn_store_attr_##_name);
+
+#define SE_DEV_WWN_ATTR_RO(_name); \
+do { \
+ static struct target_core_dev_wwn_attribute \
+ target_core_dev_wwn_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_wwn_show_attr_##_name); \
+} while (0);
+
+/*
+ * VPD page 0x80 Unit serial
+ */
+static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
+ struct t10_wwn *t10_wwn,
+ char *page)
+{
+ return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
+ &t10_wwn->unit_serial[0]);
+}
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = t10_wwn->t10_dev;
+ unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
+
+ /*
+ * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
+ * from the struct scsi_device level firmware, do not allow
+ * VPD Unit Serial to be emulated.
+ *
+ * Note this struct scsi_device could also be emulating VPD
+ * information from its drivers/scsi LLD. But for now we assume
+ * it is doing 'the right thing' wrt a world wide unique
+ * VPD Unit Serial Number that OS dependent multipath can depend on.
+ */
+ if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
+ pr_err("Underlying SCSI device firmware provided VPD"
+ " Unit Serial, ignoring request\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
+ pr_err("Emulated VPD Unit Serial exceeds"
+ " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
+ return -EOVERFLOW;
+ }
+ /*
+ * Check to see if any active $FABRIC_MOD exports exist. If they
+ * do exist, fail here as changing this information on the fly
+ * (underneath the initiator side OS dependent multipath code)
+ * could cause negative effects.
+ */
+ if (dev->export_count) {
+ pr_err("Unable to set VPD Unit Serial while"
+ " active %d $FABRIC_MOD exports exist\n",
+ dev->export_count);
+ return -EINVAL;
+ }
+
+ /*
+ * This currently assumes ASCII encoding for emulated VPD Unit Serial.
+ *
+ * Also, strip any newline added from the userspace
+ * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
+ */
+ memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
+ snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
+ snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
+ "%s", strstrip(buf));
+ dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
+
+ pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
+ " %s\n", dev->t10_wwn.unit_serial);
+
+ return count;
+}
+
+SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Protocol Identifier
+ */
+static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
+ struct t10_wwn *t10_wwn,
+ char *page)
+{
+ struct t10_vpd *vpd;
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ ssize_t len = 0;
+
+ memset(buf, 0, VPD_TMP_BUF_SIZE);
+
+ spin_lock(&t10_wwn->t10_vpd_lock);
+ list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
+ if (!vpd->protocol_identifier_set)
+ continue;
+
+ transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
+
+ if (len + strlen(buf) >= PAGE_SIZE)
+ break;
+
+ len += sprintf(page+len, "%s", buf);
+ }
+ spin_unlock(&t10_wwn->t10_vpd_lock);
+
+ return len;
+}
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
+
+/*
+ * Generic wrapper for dumping VPD identifiers by association.
+ */
+#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
+static ssize_t target_core_dev_wwn_show_attr_##_name( \
+ struct t10_wwn *t10_wwn, \
+ char *page) \
+{ \
+ struct t10_vpd *vpd; \
+ unsigned char buf[VPD_TMP_BUF_SIZE]; \
+ ssize_t len = 0; \
+ \
+ spin_lock(&t10_wwn->t10_vpd_lock); \
+ list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
+ if (vpd->association != _assoc) \
+ continue; \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if (len + strlen(buf) >= PAGE_SIZE) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if (len + strlen(buf) >= PAGE_SIZE) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ \
+ memset(buf, 0, VPD_TMP_BUF_SIZE); \
+ transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
+ if (len + strlen(buf) >= PAGE_SIZE) \
+ break; \
+ len += sprintf(page+len, "%s", buf); \
+ } \
+ spin_unlock(&t10_wwn->t10_vpd_lock); \
+ \
+ return len; \
+}
+
+/*
+ * VPD page 0x83 Association: Logical Unit
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Association: Target Port
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
+
+/*
+ * VPD page 0x83 Association: SCSI Target Device
+ */
+DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
+
+static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
+ struct t10_wwn *t10_wwn,
+ const char *page,
+ size_t count)
+{
+ return -ENOSYS;
+}
+
+SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
+
+static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
+ &target_core_dev_wwn_vpd_unit_serial.attr,
+ &target_core_dev_wwn_vpd_protocol_identifier.attr,
+ &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
+ &target_core_dev_wwn_vpd_assoc_target_port.attr,
+ &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_wwn_ops = {
+ .show_attribute = target_core_dev_wwn_attr_show,
+ .store_attribute = target_core_dev_wwn_attr_store,
+};
+
+TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
+
+/* End functions for struct config_item_type tb_dev_wwn_cit */
+
+/* Start functions for struct config_item_type tb_dev_pr_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
+#define SE_DEV_PR_ATTR(_name, _mode) \
+static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_pr_show_attr_##_name, \
+ target_core_dev_pr_store_attr_##_name);
+
+#define SE_DEV_PR_ATTR_RO(_name); \
+static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_pr_show_attr_##_name);
+
+static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
+ char *page)
+{
+ struct se_node_acl *se_nacl;
+ struct t10_pr_registration *pr_reg;
+ char i_buf[PR_REG_ISID_ID_LEN];
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+
+ pr_reg = dev->dev_pr_res_holder;
+ if (!pr_reg)
+ return sprintf(page, "No SPC-3 Reservation holder\n");
+
+ se_nacl = pr_reg->pr_reg_nacl;
+ core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
+
+ return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
+ se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ se_nacl->initiatorname, i_buf);
+}
+
+static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
+ char *page)
+{
+ struct se_node_acl *se_nacl;
+ ssize_t len;
+
+ se_nacl = dev->dev_reserved_node_acl;
+ if (se_nacl) {
+ len = sprintf(page,
+ "SPC-2 Reservation: %s Initiator: %s\n",
+ se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
+ se_nacl->initiatorname);
+ } else {
+ len = sprintf(page, "No SPC-2 Reservation holder\n");
+ }
+ return len;
+}
+
+static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
+ char *page)
+{
+ int ret;
+
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ return sprintf(page, "Passthrough\n");
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
+ ret = target_core_dev_pr_show_spc2_res(dev, page);
+ else
+ ret = target_core_dev_pr_show_spc3_res(dev, page);
+ spin_unlock(&dev->dev_reservation_lock);
+ return ret;
+}
+
+SE_DEV_PR_ATTR_RO(res_holder);
+
+static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
+ struct se_device *dev, char *page)
+{
+ ssize_t len = 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ if (!dev->dev_pr_res_holder) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
+ len = sprintf(page, "SPC-3 Reservation: All Target"
+ " Ports registration\n");
+ } else {
+ len = sprintf(page, "SPC-3 Reservation: Single"
+ " Target Port registration\n");
+ }
+
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
+
+static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
+ struct se_device *dev, char *page)
+{
+ return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_generation);
+
+/*
+ * res_pr_holder_tg_port
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
+ struct se_device *dev, char *page)
+{
+ struct se_node_acl *se_nacl;
+ struct se_lun *lun;
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg;
+ const struct target_core_fabric_ops *tfo;
+ ssize_t len = 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!pr_reg) {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ goto out_unlock;
+ }
+
+ se_nacl = pr_reg->pr_reg_nacl;
+ se_tpg = se_nacl->se_tpg;
+ lun = pr_reg->pr_reg_tg_pt_lun;
+ tfo = se_tpg->se_tpg_tfo;
+
+ len += sprintf(page+len, "SPC-3 Reservation: %s"
+ " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
+ tfo->tpg_get_wwn(se_tpg));
+ len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
+ " Identifier Tag: %hu %s Portal Group Tag: %hu"
+ " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
+ tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
+ tfo->get_fabric_name(), lun->unpacked_lun);
+
+out_unlock:
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
+
+static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
+ struct se_device *dev, char *page)
+{
+ const struct target_core_fabric_ops *tfo;
+ struct t10_pr_registration *pr_reg;
+ unsigned char buf[384];
+ char i_buf[PR_REG_ISID_ID_LEN];
+ ssize_t len = 0;
+ int reg_count = 0;
+
+ len += sprintf(page+len, "SPC-3 PR Registrations:\n");
+
+ spin_lock(&dev->t10_pr.registration_lock);
+ list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
+ pr_reg_list) {
+
+ memset(buf, 0, 384);
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+ tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
+ core_pr_dump_initiator_port(pr_reg, i_buf,
+ PR_REG_ISID_ID_LEN);
+ sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
+ tfo->get_fabric_name(),
+ pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
+ pr_reg->pr_res_generation);
+
+ if (len + strlen(buf) >= PAGE_SIZE)
+ break;
+
+ len += sprintf(page+len, "%s", buf);
+ reg_count++;
+ }
+ spin_unlock(&dev->t10_pr.registration_lock);
+
+ if (!reg_count)
+ len += sprintf(page+len, "None\n");
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
+
+static ssize_t target_core_dev_pr_show_attr_res_pr_type(
+ struct se_device *dev, char *page)
+{
+ struct t10_pr_registration *pr_reg;
+ ssize_t len = 0;
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (pr_reg) {
+ len = sprintf(page, "SPC-3 Reservation Type: %s\n",
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type));
+ } else {
+ len = sprintf(page, "No SPC-3 Reservation holder\n");
+ }
+
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_type);
+
+static ssize_t target_core_dev_pr_show_attr_res_type(
+ struct se_device *dev, char *page)
+{
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ return sprintf(page, "SPC_PASSTHROUGH\n");
+ else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
+ return sprintf(page, "SPC2_RESERVATIONS\n");
+ else
+ return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
+}
+
+SE_DEV_PR_ATTR_RO(res_type);
+
+static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
+ struct se_device *dev, char *page)
+{
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ return 0;
+
+ return sprintf(page, "APTPL Bit Status: %s\n",
+ (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
+}
+
+SE_DEV_PR_ATTR_RO(res_aptpl_active);
+
+/*
+ * res_aptpl_metadata
+ */
+static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
+ struct se_device *dev, char *page)
+{
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ return 0;
+
+ return sprintf(page, "Ready to process PR APTPL metadata..\n");
+}
+
+enum {
+ Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
+ Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
+ Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
+ Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
+};
+
+static match_table_t tokens = {
+ {Opt_initiator_fabric, "initiator_fabric=%s"},
+ {Opt_initiator_node, "initiator_node=%s"},
+ {Opt_initiator_sid, "initiator_sid=%s"},
+ {Opt_sa_res_key, "sa_res_key=%s"},
+ {Opt_res_holder, "res_holder=%d"},
+ {Opt_res_type, "res_type=%d"},
+ {Opt_res_scope, "res_scope=%d"},
+ {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
+ {Opt_mapped_lun, "mapped_lun=%d"},
+ {Opt_target_fabric, "target_fabric=%s"},
+ {Opt_target_node, "target_node=%s"},
+ {Opt_tpgt, "tpgt=%d"},
+ {Opt_port_rtpi, "port_rtpi=%d"},
+ {Opt_target_lun, "target_lun=%d"},
+ {Opt_err, NULL}
+};
+
+static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
+ struct se_device *dev,
+ const char *page,
+ size_t count)
+{
+ unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
+ unsigned char *t_fabric = NULL, *t_port = NULL;
+ char *orig, *ptr, *opts;
+ substring_t args[MAX_OPT_ARGS];
+ unsigned long long tmp_ll;
+ u64 sa_res_key = 0;
+ u32 mapped_lun = 0, target_lun = 0;
+ int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
+ u16 port_rpti = 0, tpgt = 0;
+ u8 type = 0, scope;
+
+ if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
+ return 0;
+ if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
+ return 0;
+
+ if (dev->export_count) {
+ pr_debug("Unable to process APTPL metadata while"
+ " active fabric exports exist\n");
+ return -EINVAL;
+ }
+
+ opts = kstrdup(page, GFP_KERNEL);
+ if (!opts)
+ return -ENOMEM;
+
+ orig = opts;
+ while ((ptr = strsep(&opts, ",\n")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ token = match_token(ptr, tokens, args);
+ switch (token) {
+ case Opt_initiator_fabric:
+ i_fabric = match_strdup(args);
+ if (!i_fabric) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ break;
+ case Opt_initiator_node:
+ i_port = match_strdup(args);
+ if (!i_port) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
+ pr_err("APTPL metadata initiator_node="
+ " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
+ PR_APTPL_MAX_IPORT_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_initiator_sid:
+ isid = match_strdup(args);
+ if (!isid) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (strlen(isid) >= PR_REG_ISID_LEN) {
+ pr_err("APTPL metadata initiator_isid"
+ "= exceeds PR_REG_ISID_LEN: %d\n",
+ PR_REG_ISID_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_sa_res_key:
+ ret = kstrtoull(args->from, 0, &tmp_ll);
+ if (ret < 0) {
+ pr_err("kstrtoull() failed for sa_res_key=\n");
+ goto out;
+ }
+ sa_res_key = (u64)tmp_ll;
+ break;
+ /*
+ * PR APTPL Metadata for Reservation
+ */
+ case Opt_res_holder:
+ match_int(args, &arg);
+ res_holder = arg;
+ break;
+ case Opt_res_type:
+ match_int(args, &arg);
+ type = (u8)arg;
+ break;
+ case Opt_res_scope:
+ match_int(args, &arg);
+ scope = (u8)arg;
+ break;
+ case Opt_res_all_tg_pt:
+ match_int(args, &arg);
+ all_tg_pt = (int)arg;
+ break;
+ case Opt_mapped_lun:
+ match_int(args, &arg);
+ mapped_lun = (u32)arg;
+ break;
+ /*
+ * PR APTPL Metadata for Target Port
+ */
+ case Opt_target_fabric:
+ t_fabric = match_strdup(args);
+ if (!t_fabric) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ break;
+ case Opt_target_node:
+ t_port = match_strdup(args);
+ if (!t_port) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
+ pr_err("APTPL metadata target_node="
+ " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
+ PR_APTPL_MAX_TPORT_LEN);
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ case Opt_tpgt:
+ match_int(args, &arg);
+ tpgt = (u16)arg;
+ break;
+ case Opt_port_rtpi:
+ match_int(args, &arg);
+ port_rpti = (u16)arg;
+ break;
+ case Opt_target_lun:
+ match_int(args, &arg);
+ target_lun = (u32)arg;
+ break;
+ default:
+ break;
+ }
+ }
+
+ if (!i_port || !t_port || !sa_res_key) {
+ pr_err("Illegal parameters for APTPL registration\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (res_holder && !(type)) {
+ pr_err("Illegal PR type: 0x%02x for reservation"
+ " holder\n", type);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
+ i_port, isid, mapped_lun, t_port, tpgt, target_lun,
+ res_holder, all_tg_pt, type);
+out:
+ kfree(i_fabric);
+ kfree(i_port);
+ kfree(isid);
+ kfree(t_fabric);
+ kfree(t_port);
+ kfree(orig);
+ return (ret == 0) ? count : ret;
+}
+
+SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
+
+static struct configfs_attribute *target_core_dev_pr_attrs[] = {
+ &target_core_dev_pr_res_holder.attr,
+ &target_core_dev_pr_res_pr_all_tgt_pts.attr,
+ &target_core_dev_pr_res_pr_generation.attr,
+ &target_core_dev_pr_res_pr_holder_tg_port.attr,
+ &target_core_dev_pr_res_pr_registered_i_pts.attr,
+ &target_core_dev_pr_res_pr_type.attr,
+ &target_core_dev_pr_res_type.attr,
+ &target_core_dev_pr_res_aptpl_active.attr,
+ &target_core_dev_pr_res_aptpl_metadata.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_pr_ops = {
+ .show_attribute = target_core_dev_pr_attr_show,
+ .store_attribute = target_core_dev_pr_attr_store,
+};
+
+TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
+
+/* End functions for struct config_item_type tb_dev_pr_cit */
+
+/* Start functions for struct config_item_type tb_dev_cit */
+
+static ssize_t target_core_show_dev_info(void *p, char *page)
+{
+ struct se_device *dev = p;
+ struct se_subsystem_api *t = dev->transport;
+ int bl = 0;
+ ssize_t read_bytes = 0;
+
+ transport_dump_dev_state(dev, page, &bl);
+ read_bytes += bl;
+ read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_info = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "info",
+ .ca_mode = S_IRUGO },
+ .show = target_core_show_dev_info,
+ .store = NULL,
+};
+
+static ssize_t target_core_store_dev_control(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = p;
+ struct se_subsystem_api *t = dev->transport;
+
+ return t->set_configfs_dev_params(dev, page, count);
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_control = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "control",
+ .ca_mode = S_IWUSR },
+ .show = NULL,
+ .store = target_core_store_dev_control,
+};
+
+static ssize_t target_core_show_dev_alias(void *p, char *page)
+{
+ struct se_device *dev = p;
+
+ if (!(dev->dev_flags & DF_USING_ALIAS))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
+}
+
+static ssize_t target_core_store_dev_alias(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = p;
+ struct se_hba *hba = dev->se_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_DEV_ALIAS_LEN-1)) {
+ pr_err("alias count: %d exceeds"
+ " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
+ SE_DEV_ALIAS_LEN-1);
+ return -EINVAL;
+ }
+
+ read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
+ if (!read_bytes)
+ return -EINVAL;
+ if (dev->dev_alias[read_bytes - 1] == '\n')
+ dev->dev_alias[read_bytes - 1] = '\0';
+
+ dev->dev_flags |= DF_USING_ALIAS;
+
+ pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&dev->dev_group.cg_item),
+ dev->dev_alias);
+
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_alias = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "alias",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_alias,
+ .store = target_core_store_dev_alias,
+};
+
+static ssize_t target_core_show_dev_udev_path(void *p, char *page)
+{
+ struct se_device *dev = p;
+
+ if (!(dev->dev_flags & DF_USING_UDEV_PATH))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
+}
+
+static ssize_t target_core_store_dev_udev_path(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = p;
+ struct se_hba *hba = dev->se_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_UDEV_PATH_LEN-1)) {
+ pr_err("udev_path count: %d exceeds"
+ " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
+ SE_UDEV_PATH_LEN-1);
+ return -EINVAL;
+ }
+
+ read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
+ "%s", page);
+ if (!read_bytes)
+ return -EINVAL;
+ if (dev->udev_path[read_bytes - 1] == '\n')
+ dev->udev_path[read_bytes - 1] = '\0';
+
+ dev->dev_flags |= DF_USING_UDEV_PATH;
+
+ pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&dev->dev_group.cg_item),
+ dev->udev_path);
+
+ return read_bytes;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "udev_path",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_udev_path,
+ .store = target_core_store_dev_udev_path,
+};
+
+static ssize_t target_core_show_dev_enable(void *p, char *page)
+{
+ struct se_device *dev = p;
+
+ return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
+}
+
+static ssize_t target_core_store_dev_enable(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = p;
+ char *ptr;
+ int ret;
+
+ ptr = strstr(page, "1");
+ if (!ptr) {
+ pr_err("For dev_enable ops, only valid value"
+ " is \"1\"\n");
+ return -EINVAL;
+ }
+
+ ret = target_configure_device(dev);
+ if (ret)
+ return ret;
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_enable = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "enable",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_enable,
+ .store = target_core_store_dev_enable,
+};
+
+static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
+{
+ struct se_device *dev = p;
+ struct config_item *lu_ci;
+ struct t10_alua_lu_gp *lu_gp;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ ssize_t len = 0;
+
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!lu_gp_mem)
+ return 0;
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (lu_gp) {
+ lu_ci = &lu_gp->lu_gp_group.cg_item;
+ len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
+ config_item_name(lu_ci), lu_gp->lu_gp_id);
+ }
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ return len;
+}
+
+static ssize_t target_core_store_alua_lu_gp(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = p;
+ struct se_hba *hba = dev->se_hba;
+ struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ unsigned char buf[LU_GROUP_NAME_BUF];
+ int move = 0;
+
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!lu_gp_mem)
+ return 0;
+
+ if (count > LU_GROUP_NAME_BUF) {
+ pr_err("ALUA LU Group Alias too large!\n");
+ return -EINVAL;
+ }
+ memset(buf, 0, LU_GROUP_NAME_BUF);
+ memcpy(buf, page, count);
+ /*
+ * Any ALUA logical unit alias besides "NULL" means we will be
+ * making a new group association.
+ */
+ if (strcmp(strstrip(buf), "NULL")) {
+ /*
+ * core_alua_get_lu_gp_by_name() will increment reference to
+ * struct t10_alua_lu_gp. This reference is released with
+ * core_alua_get_lu_gp_by_name below().
+ */
+ lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
+ if (!lu_gp_new)
+ return -ENODEV;
+ }
+
+ spin_lock(&lu_gp_mem->lu_gp_mem_lock);
+ lu_gp = lu_gp_mem->lu_gp;
+ if (lu_gp) {
+ /*
+ * Clearing an existing lu_gp association, and replacing
+ * with NULL
+ */
+ if (!lu_gp_new) {
+ pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
+ " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
+ " %hu\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&dev->dev_group.cg_item),
+ config_item_name(&lu_gp->lu_gp_group.cg_item),
+ lu_gp->lu_gp_id);
+
+ __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ return count;
+ }
+ /*
+ * Removing existing association of lu_gp_mem with lu_gp
+ */
+ __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
+ move = 1;
+ }
+ /*
+ * Associate lu_gp_mem with lu_gp_new.
+ */
+ __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
+ spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
+
+ pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
+ " core/alua/lu_gps/%s, ID: %hu\n",
+ (move) ? "Moving" : "Adding",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&dev->dev_group.cg_item),
+ config_item_name(&lu_gp_new->lu_gp_group.cg_item),
+ lu_gp_new->lu_gp_id);
+
+ core_alua_put_lu_gp_from_name(lu_gp_new);
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "alua_lu_gp",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_alua_lu_gp,
+ .store = target_core_store_alua_lu_gp,
+};
+
+static ssize_t target_core_show_dev_lba_map(void *p, char *page)
+{
+ struct se_device *dev = p;
+ struct t10_alua_lba_map *map;
+ struct t10_alua_lba_map_member *mem;
+ char *b = page;
+ int bl = 0;
+ char state;
+
+ spin_lock(&dev->t10_alua.lba_map_lock);
+ if (!list_empty(&dev->t10_alua.lba_map_list))
+ bl += sprintf(b + bl, "%u %u\n",
+ dev->t10_alua.lba_map_segment_size,
+ dev->t10_alua.lba_map_segment_multiplier);
+ list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
+ bl += sprintf(b + bl, "%llu %llu",
+ map->lba_map_first_lba, map->lba_map_last_lba);
+ list_for_each_entry(mem, &map->lba_map_mem_list,
+ lba_map_mem_list) {
+ switch (mem->lba_map_mem_alua_state) {
+ case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
+ state = 'O';
+ break;
+ case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
+ state = 'A';
+ break;
+ case ALUA_ACCESS_STATE_STANDBY:
+ state = 'S';
+ break;
+ case ALUA_ACCESS_STATE_UNAVAILABLE:
+ state = 'U';
+ break;
+ default:
+ state = '.';
+ break;
+ }
+ bl += sprintf(b + bl, " %d:%c",
+ mem->lba_map_mem_alua_pg_id, state);
+ }
+ bl += sprintf(b + bl, "\n");
+ }
+ spin_unlock(&dev->t10_alua.lba_map_lock);
+ return bl;
+}
+
+static ssize_t target_core_store_dev_lba_map(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = p;
+ struct t10_alua_lba_map *lba_map = NULL;
+ struct list_head lba_list;
+ char *map_entries, *ptr;
+ char state;
+ int pg_num = -1, pg;
+ int ret = 0, num = 0, pg_id, alua_state;
+ unsigned long start_lba = -1, end_lba = -1;
+ unsigned long segment_size = -1, segment_mult = -1;
+
+ map_entries = kstrdup(page, GFP_KERNEL);
+ if (!map_entries)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&lba_list);
+ while ((ptr = strsep(&map_entries, "\n")) != NULL) {
+ if (!*ptr)
+ continue;
+
+ if (num == 0) {
+ if (sscanf(ptr, "%lu %lu\n",
+ &segment_size, &segment_mult) != 2) {
+ pr_err("Invalid line %d\n", num);
+ ret = -EINVAL;
+ break;
+ }
+ num++;
+ continue;
+ }
+ if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
+ pr_err("Invalid line %d\n", num);
+ ret = -EINVAL;
+ break;
+ }
+ ptr = strchr(ptr, ' ');
+ if (!ptr) {
+ pr_err("Invalid line %d, missing end lba\n", num);
+ ret = -EINVAL;
+ break;
+ }
+ ptr++;
+ ptr = strchr(ptr, ' ');
+ if (!ptr) {
+ pr_err("Invalid line %d, missing state definitions\n",
+ num);
+ ret = -EINVAL;
+ break;
+ }
+ ptr++;
+ lba_map = core_alua_allocate_lba_map(&lba_list,
+ start_lba, end_lba);
+ if (IS_ERR(lba_map)) {
+ ret = PTR_ERR(lba_map);
+ break;
+ }
+ pg = 0;
+ while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
+ switch (state) {
+ case 'O':
+ alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
+ break;
+ case 'A':
+ alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
+ break;
+ case 'S':
+ alua_state = ALUA_ACCESS_STATE_STANDBY;
+ break;
+ case 'U':
+ alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
+ break;
+ default:
+ pr_err("Invalid ALUA state '%c'\n", state);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = core_alua_allocate_lba_map_mem(lba_map,
+ pg_id, alua_state);
+ if (ret) {
+ pr_err("Invalid target descriptor %d:%c "
+ "at line %d\n",
+ pg_id, state, num);
+ break;
+ }
+ pg++;
+ ptr = strchr(ptr, ' ');
+ if (ptr)
+ ptr++;
+ else
+ break;
+ }
+ if (pg_num == -1)
+ pg_num = pg;
+ else if (pg != pg_num) {
+ pr_err("Only %d from %d port groups definitions "
+ "at line %d\n", pg, pg_num, num);
+ ret = -EINVAL;
+ break;
+ }
+ num++;
+ }
+out:
+ if (ret) {
+ core_alua_free_lba_map(&lba_list);
+ count = ret;
+ } else
+ core_alua_set_lba_map(dev, &lba_list,
+ segment_size, segment_mult);
+ kfree(map_entries);
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "lba_map",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = target_core_show_dev_lba_map,
+ .store = target_core_store_dev_lba_map,
+};
+
+static struct configfs_attribute *target_core_dev_attrs[] = {
+ &target_core_attr_dev_info.attr,
+ &target_core_attr_dev_control.attr,
+ &target_core_attr_dev_alias.attr,
+ &target_core_attr_dev_udev_path.attr,
+ &target_core_attr_dev_enable.attr,
+ &target_core_attr_dev_alua_lu_gp.attr,
+ &target_core_attr_dev_lba_map.attr,
+ NULL,
+};
+
+static void target_core_dev_release(struct config_item *item)
+{
+ struct config_group *dev_cg = to_config_group(item);
+ struct se_device *dev =
+ container_of(dev_cg, struct se_device, dev_group);
+
+ kfree(dev_cg->default_groups);
+ target_free_device(dev);
+}
+
+static ssize_t target_core_dev_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct config_group *dev_cg = to_config_group(item);
+ struct se_device *dev =
+ container_of(dev_cg, struct se_device, dev_group);
+ struct target_core_configfs_attribute *tc_attr = container_of(
+ attr, struct target_core_configfs_attribute, attr);
+
+ if (!tc_attr->show)
+ return -EINVAL;
+
+ return tc_attr->show(dev, page);
+}
+
+static ssize_t target_core_dev_store(struct config_item *item,
+ struct configfs_attribute *attr,
+ const char *page, size_t count)
+{
+ struct config_group *dev_cg = to_config_group(item);
+ struct se_device *dev =
+ container_of(dev_cg, struct se_device, dev_group);
+ struct target_core_configfs_attribute *tc_attr = container_of(
+ attr, struct target_core_configfs_attribute, attr);
+
+ if (!tc_attr->store)
+ return -EINVAL;
+
+ return tc_attr->store(dev, page, count);
+}
+
+static struct configfs_item_operations target_core_dev_item_ops = {
+ .release = target_core_dev_release,
+ .show_attribute = target_core_dev_show,
+ .store_attribute = target_core_dev_store,
+};
+
+TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
+
+/* End functions for struct config_item_type tb_dev_cit */
+
+/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
+#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
+static struct target_core_alua_lu_gp_attribute \
+ target_core_alua_lu_gp_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_alua_lu_gp_show_attr_##_name, \
+ target_core_alua_lu_gp_store_attr_##_name);
+
+#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
+static struct target_core_alua_lu_gp_attribute \
+ target_core_alua_lu_gp_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_alua_lu_gp_show_attr_##_name);
+
+/*
+ * lu_gp_id
+ */
+static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
+ struct t10_alua_lu_gp *lu_gp,
+ char *page)
+{
+ if (!lu_gp->lu_gp_valid_id)
+ return 0;
+
+ return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
+}
+
+static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
+ struct t10_alua_lu_gp *lu_gp,
+ const char *page,
+ size_t count)
+{
+ struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
+ unsigned long lu_gp_id;
+ int ret;
+
+ ret = kstrtoul(page, 0, &lu_gp_id);
+ if (ret < 0) {
+ pr_err("kstrtoul() returned %d for"
+ " lu_gp_id\n", ret);
+ return ret;
+ }
+ if (lu_gp_id > 0x0000ffff) {
+ pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
+ " 0x0000ffff\n", lu_gp_id);
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
+ if (ret < 0)
+ return -EINVAL;
+
+ pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s to ID: %hu\n",
+ config_item_name(&alua_lu_gp_cg->cg_item),
+ lu_gp->lu_gp_id);
+
+ return count;
+}
+
+SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
+
+/*
+ * members
+ */
+static ssize_t target_core_alua_lu_gp_show_attr_members(
+ struct t10_alua_lu_gp *lu_gp,
+ char *page)
+{
+ struct se_device *dev;
+ struct se_hba *hba;
+ struct t10_alua_lu_gp_member *lu_gp_mem;
+ ssize_t len = 0, cur_len;
+ unsigned char buf[LU_GROUP_NAME_BUF];
+
+ memset(buf, 0, LU_GROUP_NAME_BUF);
+
+ spin_lock(&lu_gp->lu_gp_lock);
+ list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
+ dev = lu_gp_mem->lu_gp_mem_dev;
+ hba = dev->se_hba;
+
+ cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&dev->dev_group.cg_item));
+ cur_len++; /* Extra byte for NULL terminator */
+
+ if ((cur_len + len) > PAGE_SIZE) {
+ pr_warn("Ran out of lu_gp_show_attr"
+ "_members buffer\n");
+ break;
+ }
+ memcpy(page+len, buf, cur_len);
+ len += cur_len;
+ }
+ spin_unlock(&lu_gp->lu_gp_lock);
+
+ return len;
+}
+
+SE_DEV_ALUA_LU_ATTR_RO(members);
+
+CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
+
+static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
+ &target_core_alua_lu_gp_lu_gp_id.attr,
+ &target_core_alua_lu_gp_members.attr,
+ NULL,
+};
+
+static void target_core_alua_lu_gp_release(struct config_item *item)
+{
+ struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
+ struct t10_alua_lu_gp, lu_gp_group);
+
+ core_alua_free_lu_gp(lu_gp);
+}
+
+static struct configfs_item_operations target_core_alua_lu_gp_ops = {
+ .release = target_core_alua_lu_gp_release,
+ .show_attribute = target_core_alua_lu_gp_attr_show,
+ .store_attribute = target_core_alua_lu_gp_attr_store,
+};
+
+static struct config_item_type target_core_alua_lu_gp_cit = {
+ .ct_item_ops = &target_core_alua_lu_gp_ops,
+ .ct_attrs = target_core_alua_lu_gp_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
+
+/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
+
+static struct config_group *target_core_alua_create_lu_gp(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua_lu_gp *lu_gp;
+ struct config_group *alua_lu_gp_cg = NULL;
+ struct config_item *alua_lu_gp_ci = NULL;
+
+ lu_gp = core_alua_allocate_lu_gp(name, 0);
+ if (IS_ERR(lu_gp))
+ return NULL;
+
+ alua_lu_gp_cg = &lu_gp->lu_gp_group;
+ alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
+
+ config_group_init_type_name(alua_lu_gp_cg, name,
+ &target_core_alua_lu_gp_cit);
+
+ pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s\n",
+ config_item_name(alua_lu_gp_ci));
+
+ return alua_lu_gp_cg;
+
+}
+
+static void target_core_alua_drop_lu_gp(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
+ struct t10_alua_lu_gp, lu_gp_group);
+
+ pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
+ " Group: core/alua/lu_gps/%s, ID: %hu\n",
+ config_item_name(item), lu_gp->lu_gp_id);
+ /*
+ * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
+ * -> target_core_alua_lu_gp_release()
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
+ .make_group = &target_core_alua_create_lu_gp,
+ .drop_item = &target_core_alua_drop_lu_gp,
+};
+
+static struct config_item_type target_core_alua_lu_gps_cit = {
+ .ct_item_ops = NULL,
+ .ct_group_ops = &target_core_alua_lu_gps_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
+
+/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
+#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
+static struct target_core_alua_tg_pt_gp_attribute \
+ target_core_alua_tg_pt_gp_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_alua_tg_pt_gp_show_attr_##_name, \
+ target_core_alua_tg_pt_gp_store_attr_##_name);
+
+#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
+static struct target_core_alua_tg_pt_gp_attribute \
+ target_core_alua_tg_pt_gp_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_alua_tg_pt_gp_show_attr_##_name);
+
+/*
+ * alua_access_state
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n",
+ atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
+ unsigned long tmp;
+ int new_state, ret;
+
+ if (!tg_pt_gp->tg_pt_gp_valid_id) {
+ pr_err("Unable to do implicit ALUA on non valid"
+ " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
+ return -EINVAL;
+ }
+ if (!(dev->dev_flags & DF_CONFIGURED)) {
+ pr_err("Unable to set alua_access_state while device is"
+ " not configured\n");
+ return -ENODEV;
+ }
+
+ ret = kstrtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract new ALUA access state from"
+ " %s\n", page);
+ return ret;
+ }
+ new_state = (int)tmp;
+
+ if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
+ pr_err("Unable to process implicit configfs ALUA"
+ " transition while TPGS_IMPLICIT_ALUA is disabled\n");
+ return -EINVAL;
+ }
+ if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
+ new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
+ /* LBA DEPENDENT is only allowed with implicit ALUA */
+ pr_err("Unable to process implicit configfs ALUA transition"
+ " while explicit ALUA management is enabled\n");
+ return -EINVAL;
+ }
+
+ ret = core_alua_do_port_transition(tg_pt_gp, dev,
+ NULL, NULL, new_state, 0);
+ return (!ret) ? count : -EINVAL;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_access_status
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%s\n",
+ core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int new_status, ret;
+
+ if (!tg_pt_gp->tg_pt_gp_valid_id) {
+ pr_err("Unable to do set ALUA access status on non"
+ " valid tg_pt_gp ID: %hu\n",
+ tg_pt_gp->tg_pt_gp_valid_id);
+ return -EINVAL;
+ }
+
+ ret = kstrtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract new ALUA access status"
+ " from %s\n", page);
+ return ret;
+ }
+ new_status = (int)tmp;
+
+ if ((new_status != ALUA_STATUS_NONE) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
+ pr_err("Illegal ALUA access status: 0x%02x\n",
+ new_status);
+ return -EINVAL;
+ }
+
+ tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_access_type
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_access_type(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_access_type(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_supported_states
+ */
+
+#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
+ struct t10_alua_tg_pt_gp *t, char *p) \
+{ \
+ return sprintf(p, "%d\n", !!(t->_var & _bit)); \
+}
+
+#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
+ struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
+{ \
+ unsigned long tmp; \
+ int ret; \
+ \
+ if (!t->tg_pt_gp_valid_id) { \
+ pr_err("Unable to do set ##_name ALUA state on non" \
+ " valid tg_pt_gp ID: %hu\n", \
+ t->tg_pt_gp_valid_id); \
+ return -EINVAL; \
+ } \
+ \
+ ret = kstrtoul(p, 0, &tmp); \
+ if (ret < 0) { \
+ pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
+ return -EINVAL; \
+ } \
+ if (tmp > 1) { \
+ pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
+ return -EINVAL; \
+ } \
+ if (tmp) \
+ t->_var |= _bit; \
+ else \
+ t->_var &= ~_bit; \
+ \
+ return c; \
+}
+
+SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
+ tg_pt_gp_alua_supported_states, ALUA_T_SUP);
+SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
+ tg_pt_gp_alua_supported_states, ALUA_T_SUP);
+SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
+
+SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
+ tg_pt_gp_alua_supported_states, ALUA_O_SUP);
+SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
+ tg_pt_gp_alua_supported_states, ALUA_O_SUP);
+SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
+
+SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
+ tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
+SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
+ tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
+SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
+
+SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
+ tg_pt_gp_alua_supported_states, ALUA_U_SUP);
+SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
+ tg_pt_gp_alua_supported_states, ALUA_U_SUP);
+SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
+
+SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
+ tg_pt_gp_alua_supported_states, ALUA_S_SUP);
+SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
+ tg_pt_gp_alua_supported_states, ALUA_S_SUP);
+SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
+
+SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
+ tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
+SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
+ tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
+SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
+
+SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
+ tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
+SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
+ tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
+SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
+
+/*
+ * alua_write_metadata
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ unsigned long tmp;
+ int ret;
+
+ ret = kstrtoul(page, 0, &tmp);
+ if (ret < 0) {
+ pr_err("Unable to extract alua_write_metadata\n");
+ return ret;
+ }
+
+ if ((tmp != 0) && (tmp != 1)) {
+ pr_err("Illegal value for alua_write_metadata:"
+ " %lu\n", tmp);
+ return -EINVAL;
+ }
+ tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
+
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
+
+
+
+/*
+ * nonop_delay_msecs
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
+
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
+
+/*
+ * trans_delay_msecs
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
+
+/*
+ * implicit_trans_secs
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
+
+/*
+ * preferred
+ */
+
+static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ return core_alua_show_preferred_bit(tg_pt_gp, page);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ return core_alua_store_preferred_bit(tg_pt_gp, page, count);
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
+
+/*
+ * tg_pt_gp_id
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ if (!tg_pt_gp->tg_pt_gp_valid_id)
+ return 0;
+
+ return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
+}
+
+static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ const char *page,
+ size_t count)
+{
+ struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
+ unsigned long tg_pt_gp_id;
+ int ret;
+
+ ret = kstrtoul(page, 0, &tg_pt_gp_id);
+ if (ret < 0) {
+ pr_err("kstrtoul() returned %d for"
+ " tg_pt_gp_id\n", ret);
+ return ret;
+ }
+ if (tg_pt_gp_id > 0x0000ffff) {
+ pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
+ " 0x0000ffff\n", tg_pt_gp_id);
+ return -EINVAL;
+ }
+
+ ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
+ if (ret < 0)
+ return -EINVAL;
+
+ pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
+ "core/alua/tg_pt_gps/%s to ID: %hu\n",
+ config_item_name(&alua_tg_pt_gp_cg->cg_item),
+ tg_pt_gp->tg_pt_gp_id);
+
+ return count;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
+
+/*
+ * members
+ */
+static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
+ struct t10_alua_tg_pt_gp *tg_pt_gp,
+ char *page)
+{
+ struct se_port *port;
+ struct se_portal_group *tpg;
+ struct se_lun *lun;
+ struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
+ ssize_t len = 0, cur_len;
+ unsigned char buf[TG_PT_GROUP_NAME_BUF];
+
+ memset(buf, 0, TG_PT_GROUP_NAME_BUF);
+
+ spin_lock(&tg_pt_gp->tg_pt_gp_lock);
+ list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
+ tg_pt_gp_mem_list) {
+ port = tg_pt_gp_mem->tg_pt;
+ tpg = port->sep_tpg;
+ lun = port->sep_lun;
+
+ cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
+ "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
+ tpg->se_tpg_tfo->tpg_get_wwn(tpg),
+ tpg->se_tpg_tfo->tpg_get_tag(tpg),
+ config_item_name(&lun->lun_group.cg_item));
+ cur_len++; /* Extra byte for NULL terminator */
+
+ if ((cur_len + len) > PAGE_SIZE) {
+ pr_warn("Ran out of lu_gp_show_attr"
+ "_members buffer\n");
+ break;
+ }
+ memcpy(page+len, buf, cur_len);
+ len += cur_len;
+ }
+ spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
+
+ return len;
+}
+
+SE_DEV_ALUA_TG_PT_ATTR_RO(members);
+
+CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
+ tg_pt_gp_group);
+
+static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
+ &target_core_alua_tg_pt_gp_alua_access_state.attr,
+ &target_core_alua_tg_pt_gp_alua_access_status.attr,
+ &target_core_alua_tg_pt_gp_alua_access_type.attr,
+ &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
+ &target_core_alua_tg_pt_gp_alua_support_offline.attr,
+ &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
+ &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
+ &target_core_alua_tg_pt_gp_alua_support_standby.attr,
+ &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
+ &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
+ &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
+ &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
+ &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
+ &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
+ &target_core_alua_tg_pt_gp_preferred.attr,
+ &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
+ &target_core_alua_tg_pt_gp_members.attr,
+ NULL,
+};
+
+static void target_core_alua_tg_pt_gp_release(struct config_item *item)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
+ struct t10_alua_tg_pt_gp, tg_pt_gp_group);
+
+ core_alua_free_tg_pt_gp(tg_pt_gp);
+}
+
+static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
+ .release = target_core_alua_tg_pt_gp_release,
+ .show_attribute = target_core_alua_tg_pt_gp_attr_show,
+ .store_attribute = target_core_alua_tg_pt_gp_attr_store,
+};
+
+static struct config_item_type target_core_alua_tg_pt_gp_cit = {
+ .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
+ .ct_attrs = target_core_alua_tg_pt_gp_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
+
+/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
+
+static struct config_group *target_core_alua_create_tg_pt_gp(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua *alua = container_of(group, struct t10_alua,
+ alua_tg_pt_gps_group);
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct config_group *alua_tg_pt_gp_cg = NULL;
+ struct config_item *alua_tg_pt_gp_ci = NULL;
+
+ tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
+ if (!tg_pt_gp)
+ return NULL;
+
+ alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
+ alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
+
+ config_group_init_type_name(alua_tg_pt_gp_cg, name,
+ &target_core_alua_tg_pt_gp_cit);
+
+ pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
+ " Group: alua/tg_pt_gps/%s\n",
+ config_item_name(alua_tg_pt_gp_ci));
+
+ return alua_tg_pt_gp_cg;
+}
+
+static void target_core_alua_drop_tg_pt_gp(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
+ struct t10_alua_tg_pt_gp, tg_pt_gp_group);
+
+ pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
+ " Group: alua/tg_pt_gps/%s, ID: %hu\n",
+ config_item_name(item), tg_pt_gp->tg_pt_gp_id);
+ /*
+ * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
+ * -> target_core_alua_tg_pt_gp_release().
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
+ .make_group = &target_core_alua_create_tg_pt_gp,
+ .drop_item = &target_core_alua_drop_tg_pt_gp,
+};
+
+TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
+
+/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
+
+/* Start functions for struct config_item_type target_core_alua_cit */
+
+/*
+ * target_core_alua_cit is a ConfigFS group that lives under
+ * /sys/kernel/config/target/core/alua. There are default groups
+ * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
+ * target_core_alua_cit in target_core_init_configfs() below.
+ */
+static struct config_item_type target_core_alua_cit = {
+ .ct_item_ops = NULL,
+ .ct_attrs = NULL,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_alua_cit */
+
+/* Start functions for struct config_item_type tb_dev_stat_cit */
+
+static struct config_group *target_core_stat_mkdir(
+ struct config_group *group,
+ const char *name)
+{
+ return ERR_PTR(-ENOSYS);
+}
+
+static void target_core_stat_rmdir(
+ struct config_group *group,
+ struct config_item *item)
+{
+ return;
+}
+
+static struct configfs_group_operations target_core_stat_group_ops = {
+ .make_group = &target_core_stat_mkdir,
+ .drop_item = &target_core_stat_rmdir,
+};
+
+TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
+
+/* End functions for struct config_item_type tb_dev_stat_cit */
+
+/* Start functions for struct config_item_type target_core_hba_cit */
+
+static struct config_group *target_core_make_subdev(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_subsystem_api *t;
+ struct config_item *hba_ci = &group->cg_item;
+ struct se_hba *hba = item_to_hba(hba_ci);
+ struct se_device *dev;
+ struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
+ struct config_group *dev_stat_grp = NULL;
+ int errno = -ENOMEM, ret;
+
+ ret = mutex_lock_interruptible(&hba->hba_access_mutex);
+ if (ret)
+ return ERR_PTR(ret);
+ /*
+ * Locate the struct se_subsystem_api from parent's struct se_hba.
+ */
+ t = hba->transport;
+
+ dev = target_alloc_device(hba, name);
+ if (!dev)
+ goto out_unlock;
+
+ dev_cg = &dev->dev_group;
+
+ dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
+ GFP_KERNEL);
+ if (!dev_cg->default_groups)
+ goto out_free_device;
+
+ config_group_init_type_name(dev_cg, name, &t->tb_cits.tb_dev_cit);
+ config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
+ &t->tb_cits.tb_dev_attrib_cit);
+ config_group_init_type_name(&dev->dev_pr_group, "pr",
+ &t->tb_cits.tb_dev_pr_cit);
+ config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
+ &t->tb_cits.tb_dev_wwn_cit);
+ config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
+ "alua", &t->tb_cits.tb_dev_alua_tg_pt_gps_cit);
+ config_group_init_type_name(&dev->dev_stat_grps.stat_group,
+ "statistics", &t->tb_cits.tb_dev_stat_cit);
+
+ dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
+ dev_cg->default_groups[1] = &dev->dev_pr_group;
+ dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
+ dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
+ dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
+ dev_cg->default_groups[5] = NULL;
+ /*
+ * Add core/$HBA/$DEV/alua/default_tg_pt_gp
+ */
+ tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
+ if (!tg_pt_gp)
+ goto out_free_dev_cg_default_groups;
+ dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
+
+ tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
+ tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
+ GFP_KERNEL);
+ if (!tg_pt_gp_cg->default_groups) {
+ pr_err("Unable to allocate tg_pt_gp_cg->"
+ "default_groups\n");
+ goto out_free_tg_pt_gp;
+ }
+
+ config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
+ "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
+ tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
+ tg_pt_gp_cg->default_groups[1] = NULL;
+ /*
+ * Add core/$HBA/$DEV/statistics/ default groups
+ */
+ dev_stat_grp = &dev->dev_stat_grps.stat_group;
+ dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
+ GFP_KERNEL);
+ if (!dev_stat_grp->default_groups) {
+ pr_err("Unable to allocate dev_stat_grp->default_groups\n");
+ goto out_free_tg_pt_gp_cg_default_groups;
+ }
+ target_stat_setup_dev_default_groups(dev);
+
+ mutex_unlock(&hba->hba_access_mutex);
+ return dev_cg;
+
+out_free_tg_pt_gp_cg_default_groups:
+ kfree(tg_pt_gp_cg->default_groups);
+out_free_tg_pt_gp:
+ core_alua_free_tg_pt_gp(tg_pt_gp);
+out_free_dev_cg_default_groups:
+ kfree(dev_cg->default_groups);
+out_free_device:
+ target_free_device(dev);
+out_unlock:
+ mutex_unlock(&hba->hba_access_mutex);
+ return ERR_PTR(errno);
+}
+
+static void target_core_drop_subdev(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct config_group *dev_cg = to_config_group(item);
+ struct se_device *dev =
+ container_of(dev_cg, struct se_device, dev_group);
+ struct se_hba *hba;
+ struct config_item *df_item;
+ struct config_group *tg_pt_gp_cg, *dev_stat_grp;
+ int i;
+
+ hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
+
+ mutex_lock(&hba->hba_access_mutex);
+
+ dev_stat_grp = &dev->dev_stat_grps.stat_group;
+ for (i = 0; dev_stat_grp->default_groups[i]; i++) {
+ df_item = &dev_stat_grp->default_groups[i]->cg_item;
+ dev_stat_grp->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(dev_stat_grp->default_groups);
+
+ tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
+ for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
+ df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
+ tg_pt_gp_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ kfree(tg_pt_gp_cg->default_groups);
+ /*
+ * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
+ * directly from target_core_alua_tg_pt_gp_release().
+ */
+ dev->t10_alua.default_tg_pt_gp = NULL;
+
+ for (i = 0; dev_cg->default_groups[i]; i++) {
+ df_item = &dev_cg->default_groups[i]->cg_item;
+ dev_cg->default_groups[i] = NULL;
+ config_item_put(df_item);
+ }
+ /*
+ * se_dev is released from target_core_dev_item_ops->release()
+ */
+ config_item_put(item);
+ mutex_unlock(&hba->hba_access_mutex);
+}
+
+static struct configfs_group_operations target_core_hba_group_ops = {
+ .make_group = target_core_make_subdev,
+ .drop_item = target_core_drop_subdev,
+};
+
+CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
+#define SE_HBA_ATTR(_name, _mode) \
+static struct target_core_hba_attribute \
+ target_core_hba_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_hba_show_attr_##_name, \
+ target_core_hba_store_attr_##_name);
+
+#define SE_HBA_ATTR_RO(_name) \
+static struct target_core_hba_attribute \
+ target_core_hba_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_hba_show_attr_##_name);
+
+static ssize_t target_core_hba_show_attr_hba_info(
+ struct se_hba *hba,
+ char *page)
+{
+ return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
+ hba->hba_id, hba->transport->name,
+ TARGET_CORE_CONFIGFS_VERSION);
+}
+
+SE_HBA_ATTR_RO(hba_info);
+
+static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
+ char *page)
+{
+ int hba_mode = 0;
+
+ if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
+ hba_mode = 1;
+
+ return sprintf(page, "%d\n", hba_mode);
+}
+
+static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
+ const char *page, size_t count)
+{
+ struct se_subsystem_api *transport = hba->transport;
+ unsigned long mode_flag;
+ int ret;
+
+ if (transport->pmode_enable_hba == NULL)
+ return -EINVAL;
+
+ ret = kstrtoul(page, 0, &mode_flag);
+ if (ret < 0) {
+ pr_err("Unable to extract hba mode flag: %d\n", ret);
+ return ret;
+ }
+
+ if (hba->dev_count) {
+ pr_err("Unable to set hba_mode with active devices\n");
+ return -EINVAL;
+ }
+
+ ret = transport->pmode_enable_hba(hba, mode_flag);
+ if (ret < 0)
+ return -EINVAL;
+ if (ret > 0)
+ hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
+ else if (ret == 0)
+ hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
+
+ return count;
+}
+
+SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
+
+static void target_core_hba_release(struct config_item *item)
+{
+ struct se_hba *hba = container_of(to_config_group(item),
+ struct se_hba, hba_group);
+ core_delete_hba(hba);
+}
+
+static struct configfs_attribute *target_core_hba_attrs[] = {
+ &target_core_hba_hba_info.attr,
+ &target_core_hba_hba_mode.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_hba_item_ops = {
+ .release = target_core_hba_release,
+ .show_attribute = target_core_hba_attr_show,
+ .store_attribute = target_core_hba_attr_store,
+};
+
+static struct config_item_type target_core_hba_cit = {
+ .ct_item_ops = &target_core_hba_item_ops,
+ .ct_group_ops = &target_core_hba_group_ops,
+ .ct_attrs = target_core_hba_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_group *target_core_call_addhbatotarget(
+ struct config_group *group,
+ const char *name)
+{
+ char *se_plugin_str, *str, *str2;
+ struct se_hba *hba;
+ char buf[TARGET_CORE_NAME_MAX_LEN];
+ unsigned long plugin_dep_id = 0;
+ int ret;
+
+ memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
+ if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
+ pr_err("Passed *name strlen(): %d exceeds"
+ " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
+ TARGET_CORE_NAME_MAX_LEN);
+ return ERR_PTR(-ENAMETOOLONG);
+ }
+ snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
+
+ str = strstr(buf, "_");
+ if (!str) {
+ pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
+ return ERR_PTR(-EINVAL);
+ }
+ se_plugin_str = buf;
+ /*
+ * Special case for subsystem plugins that have "_" in their names.
+ * Namely rd_direct and rd_mcp..
+ */
+ str2 = strstr(str+1, "_");
+ if (str2) {
+ *str2 = '\0'; /* Terminate for *se_plugin_str */
+ str2++; /* Skip to start of plugin dependent ID */
+ str = str2;
+ } else {
+ *str = '\0'; /* Terminate for *se_plugin_str */
+ str++; /* Skip to start of plugin dependent ID */
+ }
+
+ ret = kstrtoul(str, 0, &plugin_dep_id);
+ if (ret < 0) {
+ pr_err("kstrtoul() returned %d for"
+ " plugin_dep_id\n", ret);
+ return ERR_PTR(ret);
+ }
+ /*
+ * Load up TCM subsystem plugins if they have not already been loaded.
+ */
+ transport_subsystem_check_init();
+
+ hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
+ if (IS_ERR(hba))
+ return ERR_CAST(hba);
+
+ config_group_init_type_name(&hba->hba_group, name,
+ &target_core_hba_cit);
+
+ return &hba->hba_group;
+}
+
+static void target_core_call_delhbafromtarget(
+ struct config_group *group,
+ struct config_item *item)
+{
+ /*
+ * core_delete_hba() is called from target_core_hba_item_ops->release()
+ * -> target_core_hba_release()
+ */
+ config_item_put(item);
+}
+
+static struct configfs_group_operations target_core_group_ops = {
+ .make_group = target_core_call_addhbatotarget,
+ .drop_item = target_core_call_delhbafromtarget,
+};
+
+static struct config_item_type target_core_cit = {
+ .ct_item_ops = NULL,
+ .ct_group_ops = &target_core_group_ops,
+ .ct_attrs = NULL,
+ .ct_owner = THIS_MODULE,
+};
+
+/* Stop functions for struct config_item_type target_core_hba_cit */
+
+void target_core_setup_sub_cits(struct se_subsystem_api *sa)
+{
+ target_core_setup_dev_cit(sa);
+ target_core_setup_dev_attrib_cit(sa);
+ target_core_setup_dev_pr_cit(sa);
+ target_core_setup_dev_wwn_cit(sa);
+ target_core_setup_dev_alua_tg_pt_gps_cit(sa);
+ target_core_setup_dev_stat_cit(sa);
+}
+EXPORT_SYMBOL(target_core_setup_sub_cits);
+
+static int __init target_core_init_configfs(void)
+{
+ struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
+ struct config_group *lu_gp_cg = NULL;
+ struct configfs_subsystem *subsys = &target_core_fabrics;
+ struct t10_alua_lu_gp *lu_gp;
+ int ret;
+
+ pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
+ " Engine: %s on %s/%s on "UTS_RELEASE"\n",
+ TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
+
+ config_group_init(&subsys->su_group);
+ mutex_init(&subsys->su_mutex);
+
+ ret = init_se_kmem_caches();
+ if (ret < 0)
+ return ret;
+ /*
+ * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
+ * and ALUA Logical Unit Group and Target Port Group infrastructure.
+ */
+ target_cg = &subsys->su_group;
+ target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
+ GFP_KERNEL);
+ if (!target_cg->default_groups) {
+ pr_err("Unable to allocate target_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ config_group_init_type_name(&target_core_hbagroup,
+ "core", &target_core_cit);
+ target_cg->default_groups[0] = &target_core_hbagroup;
+ target_cg->default_groups[1] = NULL;
+ /*
+ * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
+ */
+ hba_cg = &target_core_hbagroup;
+ hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
+ GFP_KERNEL);
+ if (!hba_cg->default_groups) {
+ pr_err("Unable to allocate hba_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+ config_group_init_type_name(&alua_group,
+ "alua", &target_core_alua_cit);
+ hba_cg->default_groups[0] = &alua_group;
+ hba_cg->default_groups[1] = NULL;
+ /*
+ * Add ALUA Logical Unit Group and Target Port Group ConfigFS
+ * groups under /sys/kernel/config/target/core/alua/
+ */
+ alua_cg = &alua_group;
+ alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
+ GFP_KERNEL);
+ if (!alua_cg->default_groups) {
+ pr_err("Unable to allocate alua_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ config_group_init_type_name(&alua_lu_gps_group,
+ "lu_gps", &target_core_alua_lu_gps_cit);
+ alua_cg->default_groups[0] = &alua_lu_gps_group;
+ alua_cg->default_groups[1] = NULL;
+ /*
+ * Add core/alua/lu_gps/default_lu_gp
+ */
+ lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
+ if (IS_ERR(lu_gp)) {
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ lu_gp_cg = &alua_lu_gps_group;
+ lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
+ GFP_KERNEL);
+ if (!lu_gp_cg->default_groups) {
+ pr_err("Unable to allocate lu_gp_cg->default_groups\n");
+ ret = -ENOMEM;
+ goto out_global;
+ }
+
+ config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
+ &target_core_alua_lu_gp_cit);
+ lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
+ lu_gp_cg->default_groups[1] = NULL;
+ default_lu_gp = lu_gp;
+ /*
+ * Register the target_core_mod subsystem with configfs.
+ */
+ ret = configfs_register_subsystem(subsys);
+ if (ret < 0) {
+ pr_err("Error %d while registering subsystem %s\n",
+ ret, subsys->su_group.cg_item.ci_namebuf);
+ goto out_global;
+ }
+ pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
+ " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
+ " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
+ /*
+ * Register built-in RAMDISK subsystem logic for virtual LUN 0
+ */
+ ret = rd_module_init();
+ if (ret < 0)
+ goto out;
+
+ ret = core_dev_setup_virtual_lun0();
+ if (ret < 0)
+ goto out;
+
+ ret = target_xcopy_setup_pt();
+ if (ret < 0)
+ goto out;
+
+ return 0;
+
+out:
+ configfs_unregister_subsystem(subsys);
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+out_global:
+ if (default_lu_gp) {
+ core_alua_free_lu_gp(default_lu_gp);
+ default_lu_gp = NULL;
+ }
+ if (lu_gp_cg)
+ kfree(lu_gp_cg->default_groups);
+ if (alua_cg)
+ kfree(alua_cg->default_groups);
+ if (hba_cg)
+ kfree(hba_cg->default_groups);
+ kfree(target_cg->default_groups);
+ release_se_kmem_caches();
+ return ret;
+}
+
+static void __exit target_core_exit_configfs(void)
+{
+ struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
+ struct config_item *item;
+ int i;
+
+ lu_gp_cg = &alua_lu_gps_group;
+ for (i = 0; lu_gp_cg->default_groups[i]; i++) {
+ item = &lu_gp_cg->default_groups[i]->cg_item;
+ lu_gp_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(lu_gp_cg->default_groups);
+ lu_gp_cg->default_groups = NULL;
+
+ alua_cg = &alua_group;
+ for (i = 0; alua_cg->default_groups[i]; i++) {
+ item = &alua_cg->default_groups[i]->cg_item;
+ alua_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(alua_cg->default_groups);
+ alua_cg->default_groups = NULL;
+
+ hba_cg = &target_core_hbagroup;
+ for (i = 0; hba_cg->default_groups[i]; i++) {
+ item = &hba_cg->default_groups[i]->cg_item;
+ hba_cg->default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(hba_cg->default_groups);
+ hba_cg->default_groups = NULL;
+ /*
+ * We expect subsys->su_group.default_groups to be released
+ * by configfs subsystem provider logic..
+ */
+ configfs_unregister_subsystem(&target_core_fabrics);
+ kfree(target_core_fabrics.su_group.default_groups);
+
+ core_alua_free_lu_gp(default_lu_gp);
+ default_lu_gp = NULL;
+
+ pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
+ " Infrastructure\n");
+
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+ target_xcopy_release_pt();
+ release_se_kmem_caches();
+}
+
+MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
+MODULE_AUTHOR("nab@Linux-iSCSI.org");
+MODULE_LICENSE("GPL");
+
+module_init(target_core_init_configfs);
+module_exit(target_core_exit_configfs);
Code Review / kvmfornfv.git / blobdiff