[RFC 06/22] tcm: Add ConfigFS subsystem backstore infrastructure
From: Nicholas A. Bellinger
Date: Mon Aug 30 2010 - 05:21:15 EST
From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch adds the TCM/ConfigFS core HBA and device backstore infrastructre
objects in /sys/kernel/config/target/core. It includes wrappers to logic for
Persistent Reservations and ALUA, and supports Linux/SCSI, Linux/BLOCK, and Linux/FILEIO
backstores using TCM subsystem plugin API.
Signed-off-by: Nicholas A. Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/target/target_core_configfs.c | 3334 +++++++++++++++++++++++++++++++++
include/target/target_core_configfs.h | 57 +
2 files changed, 3391 insertions(+), 0 deletions(-)
create mode 100644 drivers/target/target_core_configfs.c
create mode 100644 include/target/target_core_configfs.h
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
new file mode 100644
index 0000000..1d5ea7d
--- /dev/null
+++ b/drivers/target/target_core_configfs.c
@@ -0,0 +1,3334 @@
+/*******************************************************************************
+ * Filename: target_core_configfs.c
+ *
+ * This file contains ConfigFS logic for the Generic Target Engine project.
+ *
+ * Copyright (c) 2008-2010 Rising Tide Systems
+ * Copyright (c) 2008-2010 Linux-iSCSI.org
+ *
+ * Nicholas A. Bellinger <nab@xxxxxxxxxx>
+ *
+ * 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 <linux/version.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/syscalls.h>
+#include <linux/configfs.h>
+#include <linux/proc_fs.h>
+
+#include <target/target_core_base.h>
+#include <target/target_core_device.h>
+#include <target/target_core_transport.h>
+#include <target/target_core_fabric_ops.h>
+#include <target/target_core_fabric_configfs.h>
+#include <target/target_core_configfs.h>
+#include <target/configfs_macros.h>
+
+#include "target_core_alua.h"
+#include "target_core_hba.h"
+#include "target_core_pr.h"
+#include "target_core_rd.h"
+
+struct list_head g_tf_list;
+struct 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);
+};
+
+struct se_hba *target_core_get_hba_from_item(
+ struct config_item *item)
+{
+ struct se_hba *hba = container_of(to_config_group(item),
+ struct se_hba, hba_group);
+ if (!(hba))
+ return NULL;
+
+ if (core_get_hba(hba) < 0)
+ return NULL;
+
+ return hba;
+}
+
+/*
+ * 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 config_group *fabric_cg;
+ struct target_fabric_configfs *tf;
+ int ret;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> group: %p name:"
+ " %s\n", group, name);
+ /*
+ * Ensure that TCM subsystem plugins are loaded at this point for
+ * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
+ * LUN symlinks.
+ */
+ if (transport_subsystem_check_init() < 0)
+ return ERR_PTR(-EINVAL);
+
+ fabric_cg = kzalloc(sizeof(struct config_group), GFP_KERNEL);
+ if (!(fabric_cg))
+ return ERR_PTR(-ENOMEM);
+ /*
+ * 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) {
+ printk(KERN_ERR "request_module() failed for"
+ " iscsi_target_mod.ko: %d\n", ret);
+ kfree(fabric_cg);
+ 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) {
+ printk(KERN_ERR "request_module() failed for"
+ " tcm_loop.ko: %d\n", ret);
+ kfree(fabric_cg);
+ return ERR_PTR(-EINVAL);
+ }
+ }
+
+ tf = target_core_get_fabric(name);
+ if (!(tf)) {
+ printk(KERN_ERR "target_core_get_fabric() failed for %s\n",
+ name);
+ kfree(fabric_cg);
+ return ERR_PTR(-EINVAL);
+ }
+ printk(KERN_INFO "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.
+ */
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
+ &TF_CIT_TMPL(tf)->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_CIT_TMPL(tf)->tfc_wwn_cit);
+ config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
+ &TF_CIT_TMPL(tf)->tfc_discovery_cit);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
+ " %s\n", tf->tf_group.cg_item.ci_name);
+ /*
+ * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
+ */
+ tf->tf_ops.tf_subsys = tf->tf_subsys;
+ tf->tf_fabric = &tf->tf_group.cg_item;
+ printk(KERN_INFO "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;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
+ " tf list\n", config_item_name(item));
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> located fabric:"
+ " %s\n", tf->tf_name);
+ atomic_dec(&tf->tf_access_cnt);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing"
+ " tf->tf_fabric for %s\n", tf->tf_name);
+ tf->tf_fabric = NULL;
+
+ printk(KERN_INFO "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,
+ },
+ },
+};
+
+static struct configfs_subsystem *target_core_subsystem[] = {
+ &target_core_fabrics,
+ NULL,
+};
+
+/*##############################################################################
+// Start functions called by external Target Fabrics Modules
+//############################################################################*/
+
+/*
+ * First function called by fabric modules to:
+ *
+ * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
+ * 2) Add struct target_fabric_configfs to g_tf_list
+ * 3) Return struct target_fabric_configfs to fabric module to be passed
+ * into target_fabric_configfs_register().
+ */
+struct target_fabric_configfs *target_fabric_configfs_init(
+ struct module *fabric_mod,
+ const char *name)
+{
+ struct target_fabric_configfs *tf;
+
+ if (!(fabric_mod)) {
+ printk(KERN_ERR "Missing struct module *fabric_mod pointer\n");
+ return NULL;
+ }
+ if (!(name)) {
+ printk(KERN_ERR "Unable to locate passed fabric name\n");
+ return NULL;
+ }
+ if (strlen(name) > TARGET_FABRIC_NAME_SIZE) {
+ printk(KERN_ERR "Passed name: %s exceeds TARGET_FABRIC"
+ "_NAME_SIZE\n", name);
+ return NULL;
+ }
+
+ tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
+ if (!(tf))
+ return ERR_PTR(-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 = fabric_mod;
+ target_fabric_setup_cits(tf);
+
+ tf->tf_subsys = target_core_subsystem[0];
+ snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
+
+ mutex_lock(&g_tf_lock);
+ list_add_tail(&tf->tf_list, &g_tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
+ ">>>>>>>>>>>>>>\n");
+ printk(KERN_INFO "Initialized struct target_fabric_configfs: %p for"
+ " %s\n", tf, tf->tf_name);
+ return tf;
+}
+EXPORT_SYMBOL(target_fabric_configfs_init);
+
+/*
+ * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
+ */
+void target_fabric_configfs_free(
+ struct target_fabric_configfs *tf)
+{
+ mutex_lock(&g_tf_lock);
+ list_del(&tf->tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ kfree(tf);
+}
+EXPORT_SYMBOL(target_fabric_configfs_free);
+
+/*
+ * Note that config_group_find_item() calls config_item_get() and grabs the
+ * reference to the returned struct config_item *
+ * It will be released with config_put_item() in
+ * target_fabric_configfs_deregister()
+ */
+struct config_item *target_fabric_configfs_find_by_name(
+ struct configfs_subsystem *target_su,
+ const char *name)
+{
+ struct config_item *fabric;
+
+ mutex_lock(&target_su->su_mutex);
+ fabric = config_group_find_item(&target_su->su_group, name);
+ mutex_unlock(&target_su->su_mutex);
+
+ return fabric;
+}
+
+/*
+ * Called 2nd from fabric module with returned parameter of
+ * struct target_fabric_configfs * from target_fabric_configfs_init().
+ *
+ * Upon a successful registration, the new fabric's struct config_item is
+ * return. Also, a pointer to this struct is set in the passed
+ * struct target_fabric_configfs.
+ */
+int target_fabric_configfs_register(
+ struct target_fabric_configfs *tf)
+{
+ struct config_group *su_group;
+
+ if (!(tf)) {
+ printk(KERN_ERR "Unable to locate target_fabric_configfs"
+ " pointer\n");
+ return -EINVAL;
+ }
+ if (!(tf->tf_subsys)) {
+ printk(KERN_ERR "Unable to target struct config_subsystem"
+ " pointer\n");
+ return -EINVAL;
+ }
+ su_group = &tf->tf_subsys->su_group;
+ if (!(su_group)) {
+ printk(KERN_ERR "Unable to locate target struct config_group"
+ " pointer\n");
+ return -EINVAL;
+ }
+ printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
+ ">>>>>>>>>>\n");
+ return 0;
+}
+EXPORT_SYMBOL(target_fabric_configfs_register);
+
+void target_fabric_configfs_deregister(
+ struct target_fabric_configfs *tf)
+{
+ struct config_group *su_group;
+ struct configfs_subsystem *su;
+
+ if (!(tf)) {
+ printk(KERN_ERR "Unable to locate passed target_fabric_"
+ "configfs\n");
+ return;
+ }
+ su = tf->tf_subsys;
+ if (!(su)) {
+ printk(KERN_ERR "Unable to locate passed tf->tf_subsys"
+ " pointer\n");
+ return;
+ }
+ su_group = &tf->tf_subsys->su_group;
+ if (!(su_group)) {
+ printk(KERN_ERR "Unable to locate target struct config_group"
+ " pointer\n");
+ return;
+ }
+
+ printk(KERN_INFO "<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
+ ">>>>>>>>>>>>\n");
+ mutex_lock(&g_tf_lock);
+ if (atomic_read(&tf->tf_access_cnt)) {
+ mutex_unlock(&g_tf_lock);
+ printk(KERN_ERR "Non zero tf->tf_access_cnt for fabric %s\n",
+ tf->tf_name);
+ BUG();
+ }
+ list_del(&tf->tf_list);
+ mutex_unlock(&g_tf_lock);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
+ " %s\n", tf->tf_name);
+ tf->tf_module = NULL;
+ tf->tf_subsys = NULL;
+ kfree(tf);
+
+ printk("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
+ ">>>>>\n");
+ return;
+}
+EXPORT_SYMBOL(target_fabric_configfs_deregister);
+
+/*##############################################################################
+// Stop functions called by external Target Fabrics Modules
+//############################################################################*/
+
+/* Start functions for struct config_item_type target_core_dev_attrib_cit */
+
+#define DEF_DEV_ATTRIB_SHOW(_name) \
+static ssize_t target_core_dev_show_attr_##_name( \
+ struct se_dev_attrib *da, \
+ char *page) \
+{ \
+ struct se_device *dev; \
+ struct se_subsystem_dev *se_dev = da->da_sub_dev; \
+ ssize_t rb; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ dev = se_dev->se_dev_ptr; \
+ if (!(dev)) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return -ENODEV; \
+ } \
+ rb = snprintf(page, PAGE_SIZE, "%u\n", (u32)DEV_ATTRIB(dev)->_name); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return rb; \
+}
+
+#define DEF_DEV_ATTRIB_STORE(_name) \
+static ssize_t target_core_dev_store_attr_##_name( \
+ struct se_dev_attrib *da, \
+ const char *page, \
+ size_t count) \
+{ \
+ struct se_device *dev; \
+ struct se_subsystem_dev *se_dev = da->da_sub_dev; \
+ unsigned long val; \
+ int ret; \
+ \
+ spin_lock(&se_dev->se_dev_lock); \
+ dev = se_dev->se_dev_ptr; \
+ if (!(dev)) { \
+ spin_unlock(&se_dev->se_dev_lock); \
+ return -ENODEV; \
+ } \
+ ret = strict_strtoul(page, 0, &val); \
+ if (ret < 0) { \
+ printk(KERN_ERR "strict_strtoul() failed with" \
+ " ret: %d\n", ret); \
+ return -EINVAL; \
+ } \
+ ret = se_dev_set_##_name(dev, (u32)val); \
+ spin_unlock(&se_dev->se_dev_lock); \
+ \
+ return (!ret) ? count : -EINVAL; \
+}
+
+#define DEF_DEV_ATTRIB(_name) \
+DEF_DEV_ATTRIB_SHOW(_name); \
+DEF_DEV_ATTRIB_STORE(_name);
+
+#define DEF_DEV_ATTRIB_RO(_name) \
+DEF_DEV_ATTRIB_SHOW(_name);
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
+#define SE_DEV_ATTR(_name, _mode) \
+static struct target_core_dev_attrib_attribute \
+ target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_show_attr_##_name, \
+ target_core_dev_store_attr_##_name);
+
+#define SE_DEV_ATTR_RO(_name); \
+static struct target_core_dev_attrib_attribute \
+ target_core_dev_attrib_##_name = \
+ __CONFIGFS_EATTR_RO(_name, \
+ target_core_dev_show_attr_##_name);
+
+DEF_DEV_ATTRIB(emulate_dpo);
+SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_fua_write);
+SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_fua_read);
+SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_write_cache);
+SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
+SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(emulate_tas);
+SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(enforce_pr_isids);
+SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_block_size);
+SE_DEV_ATTR_RO(hw_block_size);
+
+DEF_DEV_ATTRIB(block_size);
+SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_max_sectors);
+SE_DEV_ATTR_RO(hw_max_sectors);
+
+DEF_DEV_ATTRIB(max_sectors);
+SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB_RO(hw_queue_depth);
+SE_DEV_ATTR_RO(hw_queue_depth);
+
+DEF_DEV_ATTRIB(queue_depth);
+SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
+
+DEF_DEV_ATTRIB(task_timeout);
+SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
+
+static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
+ &target_core_dev_attrib_emulate_dpo.attr,
+ &target_core_dev_attrib_emulate_fua_write.attr,
+ &target_core_dev_attrib_emulate_fua_read.attr,
+ &target_core_dev_attrib_emulate_write_cache.attr,
+ &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
+ &target_core_dev_attrib_emulate_tas.attr,
+ &target_core_dev_attrib_enforce_pr_isids.attr,
+ &target_core_dev_attrib_hw_block_size.attr,
+ &target_core_dev_attrib_block_size.attr,
+ &target_core_dev_attrib_hw_max_sectors.attr,
+ &target_core_dev_attrib_max_sectors.attr,
+ &target_core_dev_attrib_hw_queue_depth.attr,
+ &target_core_dev_attrib_queue_depth.attr,
+ &target_core_dev_attrib_task_timeout.attr,
+ NULL,
+};
+
+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,
+};
+
+static struct config_item_type target_core_dev_attrib_cit = {
+ .ct_item_ops = &target_core_dev_attrib_ops,
+ .ct_attrs = target_core_dev_attrib_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_attrib_cit */
+
+/* Start functions for struct config_item_type target_core_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)
+{
+ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+
+ dev = se_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ 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_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
+ struct se_device *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 (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
+ printk(KERN_ERR "Underlying SCSI device firmware provided VPD"
+ " Unit Serial, ignoring request\n");
+ return -EOPNOTSUPP;
+ }
+
+ if ((strlen(page) + 1) > INQUIRY_VPD_SERIAL_LEN) {
+ printk(KERN_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.
+ */
+ dev = su_dev->se_dev_ptr;
+ if ((dev)) {
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_ERR "Unable to set VPD Unit Serial while"
+ " active %d $FABRIC_MOD exports exist\n",
+ atomic_read(&dev->dev_export_obj.obj_access_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(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
+ "%s", strstrip(buf));
+ su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
+ " %s\n", su_dev->t10_wwn.unit_serial);
+ if (dev)
+ transport_rescan_evpd_device_ident(dev);
+
+ 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 se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
+ struct se_device *dev;
+ struct t10_vpd *vpd;
+ unsigned char buf[VPD_TMP_BUF_SIZE];
+ ssize_t len = 0;
+
+ dev = se_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ 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 se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
+ struct se_device *dev; \
+ struct t10_vpd *vpd; \
+ unsigned char buf[VPD_TMP_BUF_SIZE]; \
+ ssize_t len = 0; \
+ \
+ dev = se_dev->se_dev_ptr; \
+ if (!(dev)) \
+ return -ENODEV; \
+ \
+ 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 Assoication: 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,
+};
+
+static struct config_item_type target_core_dev_wwn_cit = {
+ .ct_item_ops = &target_core_dev_wwn_ops,
+ .ct_attrs = target_core_dev_wwn_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_wwn_cit */
+
+/* Start functions for struct config_item_type target_core_dev_pr_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
+#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);
+
+/*
+ * res_holder
+ */
+static ssize_t target_core_dev_pr_show_spc3_res(
+ struct se_device *dev,
+ char *page,
+ ssize_t *len)
+{
+ struct se_node_acl *se_nacl;
+ struct t10_pr_registration *pr_reg;
+ char i_buf[PR_REG_ISID_ID_LEN];
+ int prf_isid;
+
+ memset(i_buf, 0, PR_REG_ISID_ID_LEN);
+
+ spin_lock(&dev->dev_reservation_lock);
+ pr_reg = dev->dev_pr_res_holder;
+ if (!(pr_reg)) {
+ *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return *len;
+ }
+ se_nacl = pr_reg->pr_reg_nacl;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ PR_REG_ISID_ID_LEN);
+
+ *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
+ TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
+ se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return *len;
+}
+
+static ssize_t target_core_dev_pr_show_spc2_res(
+ struct se_device *dev,
+ char *page,
+ ssize_t *len)
+{
+ struct se_node_acl *se_nacl;
+
+ spin_lock(&dev->dev_reservation_lock);
+ se_nacl = dev->dev_reserved_node_acl;
+ if (!(se_nacl)) {
+ *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
+ spin_unlock(&dev->dev_reservation_lock);
+ return *len;
+ }
+ *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
+ TPG_TFO(se_nacl->se_tpg)->get_fabric_name(),
+ se_nacl->initiatorname);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return *len;
+}
+
+static ssize_t target_core_dev_pr_show_attr_res_holder(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ ssize_t len = 0;
+
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ switch (T10_RES(su_dev)->res_type) {
+ case SPC3_PERSISTENT_RESERVATIONS:
+ target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
+ page, &len);
+ break;
+ case SPC2_RESERVATIONS:
+ target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
+ page, &len);
+ break;
+ case SPC_PASSTHROUGH:
+ len += sprintf(page+len, "Passthrough\n");
+ break;
+ default:
+ len += sprintf(page+len, "Unknown\n");
+ break;
+ }
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_holder);
+
+/*
+ * res_pr_all_tgt_pts
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct t10_pr_registration *pr_reg;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ 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");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ /*
+ * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
+ * Basic PERSISTENT RESERVER OUT parameter list, page 290
+ */
+ if (pr_reg->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);
+
+/*
+ * res_pr_generation
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "0x%08x\n", T10_RES(su_dev)->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_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct se_node_acl *se_nacl;
+ struct se_lun *lun;
+ struct se_portal_group *se_tpg;
+ struct t10_pr_registration *pr_reg;
+ struct target_core_fabric_ops *tfo;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ 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");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ se_nacl = pr_reg->pr_reg_nacl;
+ se_tpg = se_nacl->se_tpg;
+ lun = pr_reg->pr_reg_tg_pt_lun;
+ tfo = TPG_TFO(se_tpg);
+
+ 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"
+ " Identifer 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);
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
+
+/*
+ * res_pr_registered_i_pts
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ 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, prf_isid;
+
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ len += sprintf(page+len, "SPC-3 PR Registrations:\n");
+
+ spin_lock(&T10_RES(su_dev)->registration_lock);
+ list_for_each_entry(pr_reg, &T10_RES(su_dev)->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;
+ prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
+ 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, (prf_isid) ?
+ &i_buf[0] : "", 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(&T10_RES(su_dev)->registration_lock);
+
+ if (!(reg_count))
+ len += sprintf(page+len, "None\n");
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
+
+/*
+ * res_pr_type
+ */
+static ssize_t target_core_dev_pr_show_attr_res_pr_type(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ struct se_device *dev;
+ struct t10_pr_registration *pr_reg;
+ ssize_t len = 0;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return len;
+
+ 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");
+ spin_unlock(&dev->dev_reservation_lock);
+ return len;
+ }
+ len = sprintf(page, "SPC-3 Reservation Type: %s\n",
+ core_scsi3_pr_dump_type(pr_reg->pr_res_type));
+ spin_unlock(&dev->dev_reservation_lock);
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_pr_type);
+
+/*
+ * res_type
+ */
+static ssize_t target_core_dev_pr_show_attr_res_type(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ ssize_t len = 0;
+
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ switch (T10_RES(su_dev)->res_type) {
+ case SPC3_PERSISTENT_RESERVATIONS:
+ len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
+ break;
+ case SPC2_RESERVATIONS:
+ len = sprintf(page, "SPC2_RESERVATIONS\n");
+ break;
+ case SPC_PASSTHROUGH:
+ len = sprintf(page, "SPC_PASSTHROUGH\n");
+ break;
+ default:
+ len = sprintf(page, "UNKNOWN\n");
+ break;
+ }
+
+ return len;
+}
+
+SE_DEV_PR_ATTR_RO(res_type);
+
+/*
+ * res_aptpl_active
+ */
+
+static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
+ struct se_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "APTPL Bit Status: %s\n",
+ (T10_RES(su_dev)->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_subsystem_dev *su_dev,
+ char *page)
+{
+ if (!(su_dev->se_dev_ptr))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ return sprintf(page, "Ready to process PR APTPL metadata..\n");
+}
+
+static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
+ struct se_subsystem_dev *su_dev,
+ const char *page,
+ size_t count)
+{
+ struct se_device *dev;
+ unsigned char *i_fabric, *t_fabric, *i_port = NULL, *t_port = NULL;
+ unsigned char *isid = NULL;
+ char *ptr, *ptr2, *cur, *buf;
+ unsigned long long tmp_ll;
+ unsigned long tmp_l;
+ u64 sa_res_key = 0;
+ u32 mapped_lun = 0, target_lun = 0;
+ int ret = -1, res_holder = 0, all_tg_pt = 0;
+ u16 port_rpti = 0, tpgt = 0;
+ u8 type = 0, scope;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_RES(su_dev)->res_type != SPC3_PERSISTENT_RESERVATIONS)
+ return 0;
+
+ if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
+ printk(KERN_INFO "Unable to process APTPL metadata while"
+ " active fabric exports exist\n");
+ return -EINVAL;
+ }
+ /*
+ * Allocate and copy input to our own buffer so that we can setup
+ * NULL terminators later for incoming PR APTPL metadata..
+ */
+ buf = kzalloc(count, GFP_KERNEL);
+ memcpy(buf, page, count);
+ cur = &buf[0];
+
+ while (cur) {
+ ptr = strstr(cur, "=");
+ if (!(ptr))
+ goto out;
+
+ *ptr = '\0';
+ ptr++;
+ /*
+ * PR APTPL Metadata for Initiator Port
+ */
+ ptr2 = strstr(cur, "initiator_fabric");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ i_fabric = ptr;
+ continue;
+ }
+ ptr2 = strstr(cur, "initiator_node");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ if (strlen(ptr) > PR_APTPL_MAX_IPORT_LEN) {
+ printk(KERN_ERR "APTPL metadata initiator_node="
+ " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
+ PR_APTPL_MAX_IPORT_LEN);
+ ret = -1;
+ break;
+ }
+ i_port = ptr;
+ continue;
+ }
+ ptr2 = strstr(cur, "initiator_sid");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ if (strlen(ptr) > PR_REG_ISID_LEN) {
+ printk(KERN_ERR "APTPL metadata initiator_isid"
+ "= exceeds PR_REG_ISID_LEN: %d\n",
+ PR_REG_ISID_LEN);
+ ret = -1;
+ break;
+ }
+ isid = ptr;
+ continue;
+ }
+ ptr2 = strstr(cur, "sa_res_key");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoull(ptr, 0, &tmp_ll);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoull() failed for"
+ " sa_res_key=\n");
+ break;
+ }
+ sa_res_key = (u64)tmp_ll;
+ continue;
+ }
+ /*
+ * PR APTPL Metadata for Reservation
+ */
+ ptr2 = strstr(cur, "res_holder");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " res_holder=\n");
+ break;
+ }
+ res_holder = (int)tmp_l;
+ continue;
+ }
+ ptr2 = strstr(cur, "res_type");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " res_type=\n");
+ break;
+ }
+ type = (u8)tmp_l;
+ continue;
+ }
+ ptr2 = strstr(cur, "res_scope");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " res_scope=\n");
+ break;
+ }
+ scope = (u8)tmp_l;
+ continue;
+ }
+ ptr2 = strstr(cur, "res_all_tg_pt");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " res_all_tg_pt=\n");
+ break;
+ }
+ all_tg_pt = (int)tmp_l;
+ continue;
+ }
+ ptr2 = strstr(cur, "mapped_lun");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " mapped_lun=\n");
+ break;
+ }
+ mapped_lun = (u32)tmp_l;
+ continue;
+ }
+ /*
+ * PR APTPL Metadata for Target Port
+ */
+ ptr2 = strstr(cur, "target_fabric");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ t_fabric = ptr;
+ continue;
+ }
+ ptr2 = strstr(cur, "target_node");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ if (strlen(ptr) > PR_APTPL_MAX_TPORT_LEN) {
+ printk(KERN_ERR "APTPL metadata target_node="
+ " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
+ PR_APTPL_MAX_TPORT_LEN);
+ ret = -1;
+ break;
+ }
+ t_port = ptr;
+ continue;
+ }
+ ptr2 = strstr(cur, "tpgt");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " tpgt=\n");
+ break;
+ }
+ tpgt = (u16)tmp_l;
+ continue;
+ }
+ ptr2 = strstr(cur, "port_rtpi");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " port_rtpi=\n");
+ break;
+ }
+ port_rpti = (u16)tmp_l;
+ continue;
+ }
+ ptr2 = strstr(cur, "target_lun");
+ if (ptr2) {
+ transport_check_dev_params_delim(ptr, &cur);
+ ret = strict_strtoul(ptr, 0, &tmp_l);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() failed for"
+ " target_lun=\n");
+ break;
+ }
+ target_lun = (u32)tmp_l;
+ continue;
+ } else
+ cur = NULL;
+ }
+
+ if (!(i_port) || !(t_port) || !(sa_res_key)) {
+ printk(KERN_ERR "Illegal parameters for APTPL registration\n");
+ ret = -1;
+ goto out;
+ }
+
+ if (res_holder && !(type)) {
+ printk(KERN_ERR "Illegal PR type: 0x%02x for reservation"
+ " holder\n", type);
+ ret = -1;
+ goto out;
+ }
+
+ ret = core_scsi3_alloc_aptpl_registration(T10_RES(su_dev), sa_res_key,
+ i_port, isid, mapped_lun, t_port, tpgt, target_lun,
+ res_holder, all_tg_pt, type);
+out:
+ kfree(buf);
+ return (ret == 0) ? count : -EINVAL;
+}
+
+SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_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,
+};
+
+static struct config_item_type target_core_dev_pr_cit = {
+ .ct_item_ops = &target_core_dev_pr_ops,
+ .ct_attrs = target_core_dev_pr_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_dev_pr_cit */
+
+/* Start functions for struct config_item type target_core_dev_snap_cit */
+
+CONFIGFS_EATTR_STRUCT(target_core_dev_snap, se_subsystem_dev);
+#define SE_DEV_SNAP_ATTR(_name, _mode) \
+static struct target_core_dev_snap_attribute \
+ target_core_dev_snap_attr_##_name = \
+ __CONFIGFS_EATTR(_name, _mode, \
+ target_core_dev_snap_show_attr_##_name, \
+ target_core_dev_snap_store_attr_##_name);
+
+#define DEF_SNAP_ATTRIB_STR_SHOW(_name) \
+static ssize_t target_core_dev_snap_show_attr_##_name( \
+ struct se_subsystem_dev *se_dev, \
+ char *page) \
+{ \
+ return snprintf(page, PAGE_SIZE, "%s\n", SE_DEV_SNAP(se_dev)->_name); \
+}
+
+#define DEF_SNAP_ATTRIB_STR_STORE(_name, _max) \
+static ssize_t target_core_dev_snap_store_attr_##_name( \
+ struct se_subsystem_dev *se_dev, \
+ const char *page, \
+ size_t count) \
+{ \
+ if (strlen(page) > _max) { \
+ printk(KERN_ERR "String length for attrib: %s exceeds max:" \
+ " %d\n", __stringify(_name), _max); \
+ return -EINVAL; \
+ } \
+ snprintf(SE_DEV_SNAP(se_dev)->_name, PAGE_SIZE, "%s", page); \
+ return count; \
+}
+
+#define DEF_SNAP_ATTRIB_STR(_name, _max) \
+DEF_SNAP_ATTRIB_STR_SHOW(_name) \
+DEF_SNAP_ATTRIB_STR_STORE(_name, _max)
+
+#define DEF_SNAP_ATTRIB_INT_SHOW(_name) \
+static ssize_t target_core_dev_snap_show_attr_##_name( \
+ struct se_subsystem_dev *se_dev, \
+ char *page) \
+{ \
+ return snprintf(page, PAGE_SIZE, "%d\n", SE_DEV_SNAP(se_dev)->_name); \
+}
+
+#define DEF_SNAP_ATTRIB_INT_STORE(_name, _max, _min) \
+static ssize_t target_core_dev_snap_store_attr_##_name( \
+ struct se_subsystem_dev *se_dev, \
+ const char *page, \
+ size_t count) \
+{ \
+ int ret; \
+ unsigned long val; \
+ \
+ ret = strict_strtoul(page, 0, &val); \
+ if (ret < 0) { \
+ printk(KERN_ERR "strict_strtoul() failed for %s with" \
+ " ret: %d\n", __stringify(_name), ret); \
+ return -EINVAL; \
+ } \
+ if ((_max != 0) && (val > _max)) { \
+ printk(KERN_ERR "snap attribute: %s exceeds max: %d\n", \
+ __stringify(_name), _max); \
+ return -EINVAL; \
+ } \
+ if (val < _min) { \
+ printk(KERN_ERR "snap attribute: %s less than min: %d\n", \
+ __stringify(_name), _min); \
+ return -EINVAL; \
+ } \
+ SE_DEV_SNAP(se_dev)->_name = (int)val; \
+ return count; \
+}
+
+#define DEF_SNAP_ATTRIB_INT(_name, _max, _min) \
+DEF_SNAP_ATTRIB_INT_SHOW(_name) \
+DEF_SNAP_ATTRIB_INT_STORE(_name, _max, _min)
+
+DEF_SNAP_ATTRIB_STR(contact, SNAP_CONTACT_LEN);
+SE_DEV_SNAP_ATTR(contact, S_IRUGO | S_IWUSR);
+
+DEF_SNAP_ATTRIB_STR(lv_group, SNAP_GROUP_LEN);
+SE_DEV_SNAP_ATTR(lv_group, S_IRUGO | S_IWUSR);
+
+DEF_SNAP_ATTRIB_STR(lvc_size, SNAP_LVC_LEN);
+SE_DEV_SNAP_ATTR(lvc_size, S_IRUGO | S_IWUSR);
+
+DEF_SNAP_ATTRIB_INT(pid, 0, 0);
+SE_DEV_SNAP_ATTR(pid, S_IRUGO | S_IWUSR);
+
+DEF_SNAP_ATTRIB_INT(enabled, 1, 0);
+SE_DEV_SNAP_ATTR(enabled, S_IRUGO | S_IWUSR);
+
+DEF_SNAP_ATTRIB_INT(permissions, 1, 0);
+SE_DEV_SNAP_ATTR(permissions, S_IRUGO | S_IWUSR);
+
+/* Max number of snapshots to rotate */
+DEF_SNAP_ATTRIB_INT(max_snapshots, 256, 1);
+SE_DEV_SNAP_ATTR(max_snapshots, S_IRUGO | S_IWUSR);
+
+/* Max minutes for warning emails about usage */
+DEF_SNAP_ATTRIB_INT(max_warn, 60, 0);
+SE_DEV_SNAP_ATTR(max_warn, S_IRUGO | S_IWUSR);
+
+/* 15 Minute max, 5 second min */
+DEF_SNAP_ATTRIB_INT(check_interval, 900, 5);
+SE_DEV_SNAP_ATTR(check_interval, S_IRUGO | S_IWUSR);
+
+/* One 7-day week max, 1 minute min */
+DEF_SNAP_ATTRIB_INT(create_interval, 604800, 60);
+SE_DEV_SNAP_ATTR(create_interval, S_IRUGO | S_IWUSR);
+
+/* Snapshot usage */
+DEF_SNAP_ATTRIB_INT(usage, 100, 0);
+SE_DEV_SNAP_ATTR(usage, S_IRUGO | S_IWUSR);
+
+/* Snapshot usage before sending warning */
+DEF_SNAP_ATTRIB_INT(usage_warn, 100, 0);
+SE_DEV_SNAP_ATTR(usage_warn, S_IRUGO | S_IWUSR);
+
+/* Volume group usage before sending warning */
+DEF_SNAP_ATTRIB_INT(vgs_usage_warn, 100, 0);
+SE_DEV_SNAP_ATTR(vgs_usage_warn, S_IRUGO | S_IWUSR);
+
+CONFIGFS_EATTR_OPS(target_core_dev_snap, se_subsystem_dev, se_dev_snap_group);
+
+static struct configfs_attribute *target_core_dev_snap_attrs[] = {
+ &target_core_dev_snap_attr_contact.attr,
+ &target_core_dev_snap_attr_lv_group.attr,
+ &target_core_dev_snap_attr_lvc_size.attr,
+ &target_core_dev_snap_attr_pid.attr,
+ &target_core_dev_snap_attr_enabled.attr,
+ &target_core_dev_snap_attr_permissions.attr,
+ &target_core_dev_snap_attr_max_snapshots.attr,
+ &target_core_dev_snap_attr_max_warn.attr,
+ &target_core_dev_snap_attr_check_interval.attr,
+ &target_core_dev_snap_attr_create_interval.attr,
+ &target_core_dev_snap_attr_usage.attr,
+ &target_core_dev_snap_attr_usage_warn.attr,
+ &target_core_dev_snap_attr_vgs_usage_warn.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_dev_snap_ops = {
+ .show_attribute = target_core_dev_snap_attr_show,
+ .store_attribute = target_core_dev_snap_attr_store,
+};
+
+static struct config_item_type target_core_dev_snap_cit = {
+ .ct_item_ops = &target_core_dev_snap_ops,
+ .ct_attrs = target_core_dev_snap_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item type target_core_dev_snap_cit */
+
+/* Start functions for struct config_item_type target_core_dev_cit */
+
+static ssize_t target_core_show_dev_info(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+ int bl = 0;
+ ssize_t read_bytes = 0;
+
+ if (!(se_dev->se_dev_ptr))
+ return -ENODEV;
+
+ transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
+ read_bytes += bl;
+ read_bytes += t->show_configfs_dev_params(hba, se_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_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+
+ if (!(se_dev->se_dev_su_ptr)) {
+ printk(KERN_ERR "Unable to locate struct se_subsystem_dev>se"
+ "_dev_su_ptr\n");
+ return -EINVAL;
+ }
+
+ return t->set_configfs_dev_params(hba, se_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_store_dev_fd(void *p, const char *page, size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_device *dev;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+
+ if (se_dev->se_dev_ptr) {
+ printk(KERN_ERR "se_dev->se_dev_ptr already set, ignoring"
+ " fd request\n");
+ return -EEXIST;
+ }
+
+ if (!(t->create_virtdevice_from_fd)) {
+ printk(KERN_ERR "struct se_subsystem_api->create_virtdevice_from"
+ "_fd() NULL for: %s\n", hba->transport->name);
+ return -EINVAL;
+ }
+ /*
+ * The subsystem PLUGIN is responsible for calling target_core_mod
+ * symbols to claim the underlying struct block_device for TYPE_DISK.
+ */
+ dev = t->create_virtdevice_from_fd(se_dev, page);
+ if (!(dev) || IS_ERR(dev))
+ goto out;
+
+ se_dev->se_dev_ptr = dev;
+ printk(KERN_INFO "Target_Core_ConfigFS: Registered %s se_dev->se_dev"
+ "_ptr: %p from fd\n", hba->transport->name, se_dev->se_dev_ptr);
+ return count;
+out:
+ return -EINVAL;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_fd = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "fd",
+ .ca_mode = S_IWUSR },
+ .show = NULL,
+ .store = target_core_store_dev_fd,
+};
+
+static ssize_t target_core_show_dev_alias(void *p, char *page)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+
+ if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
+}
+
+static ssize_t target_core_store_dev_alias(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_DEV_ALIAS_LEN-1)) {
+ printk(KERN_ERR "alias count: %d exceeds"
+ " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
+ SE_DEV_ALIAS_LEN-1);
+ return -EINVAL;
+ }
+
+ se_dev->su_dev_flags |= SDF_USING_ALIAS;
+ read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
+ "%s", page);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set alias: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&se_dev->se_dev_group.cg_item),
+ se_dev->se_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_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+
+ if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
+ return 0;
+
+ return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
+}
+
+static ssize_t target_core_store_dev_udev_path(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ ssize_t read_bytes;
+
+ if (count > (SE_UDEV_PATH_LEN-1)) {
+ printk(KERN_ERR "udev_path count: %d exceeds"
+ " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
+ SE_UDEV_PATH_LEN-1);
+ return -EINVAL;
+ }
+
+ se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
+ read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
+ "%s", page);
+
+ printk(KERN_INFO "Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&se_dev->se_dev_group.cg_item),
+ se_dev->se_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_store_dev_enable(
+ void *p,
+ const char *page,
+ size_t count)
+{
+ struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
+ struct se_device *dev;
+ struct se_hba *hba = se_dev->se_dev_hba;
+ struct se_subsystem_api *t = hba->transport;
+ char *ptr;
+
+ ptr = strstr(page, "1");
+ if (!(ptr)) {
+ printk(KERN_ERR "For dev_enable ops, only valid value"
+ " is \"1\"\n");
+ return -EINVAL;
+ }
+ if ((se_dev->se_dev_ptr)) {
+ printk(KERN_ERR "se_dev->se_dev_ptr already set for storage"
+ " object\n");
+ return -EEXIST;
+ }
+
+ if (t->check_configfs_dev_params(hba, se_dev) < 0)
+ return -EINVAL;
+
+ dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
+ if (!(dev) || IS_ERR(dev))
+ return -EINVAL;
+
+ se_dev->se_dev_ptr = dev;
+ printk(KERN_INFO "Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
+ " %p\n", se_dev->se_dev_ptr);
+
+ return count;
+}
+
+static struct target_core_configfs_attribute target_core_attr_dev_enable = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "enable",
+ .ca_mode = S_IWUSR },
+ .show = NULL,
+ .store = target_core_store_dev_enable,
+};
+
+static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
+{
+ struct se_device *dev;
+ struct se_subsystem_dev *su_dev = (struct se_subsystem_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;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED)
+ return len;
+
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!(lu_gp_mem)) {
+ printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
+ " pointer\n");
+ return -EINVAL;
+ }
+
+ 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;
+ struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
+ struct se_hba *hba = su_dev->se_dev_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;
+
+ dev = su_dev->se_dev_ptr;
+ if (!(dev))
+ return -ENODEV;
+
+ if (T10_ALUA(su_dev)->alua_type != SPC3_ALUA_EMULATED) {
+ printk(KERN_WARNING "SPC3_ALUA_EMULATED not enabled for %s/%s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item));
+ return -EINVAL;
+ }
+ if (count > LU_GROUP_NAME_BUF) {
+ printk(KERN_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;
+ }
+ lu_gp_mem = dev->dev_alua_lu_gp_mem;
+ if (!(lu_gp_mem)) {
+ if (lu_gp_new)
+ core_alua_put_lu_gp_from_name(lu_gp_new);
+ printk(KERN_ERR "NULL struct se_device->dev_alua_lu_gp_mem"
+ " pointer\n");
+ return -EINVAL;
+ }
+
+ 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)) {
+ printk(KERN_INFO "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(&su_dev->se_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);
+
+ printk(KERN_INFO "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(&su_dev->se_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 struct configfs_attribute *lio_core_dev_attrs[] = {
+ &target_core_attr_dev_info.attr,
+ &target_core_attr_dev_control.attr,
+ &target_core_attr_dev_fd.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,
+ NULL,
+};
+
+static void target_core_dev_release(struct config_item *item)
+{
+ struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
+ struct se_subsystem_dev, se_dev_group);
+ struct config_group *dev_cg;
+
+ if (!(se_dev))
+ return;
+
+ dev_cg = &se_dev->se_dev_group;
+ kfree(dev_cg->default_groups);
+}
+
+static ssize_t target_core_dev_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(item), struct se_subsystem_dev,
+ se_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((void *)se_dev, page);
+}
+
+static ssize_t target_core_dev_store(struct config_item *item,
+ struct configfs_attribute *attr,
+ const char *page, size_t count)
+{
+ struct se_subsystem_dev *se_dev = container_of(
+ to_config_group(item), struct se_subsystem_dev,
+ se_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((void *)se_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,
+};
+
+static struct config_item_type target_core_dev_cit = {
+ .ct_item_ops = &target_core_dev_item_ops,
+ .ct_attrs = lio_core_dev_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_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 = strict_strtoul(page, 0, &lu_gp_id);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() returned %d for"
+ " lu_gp_id\n", ret);
+ return -EINVAL;
+ }
+ if (lu_gp_id > 0x0000ffff) {
+ printk(KERN_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;
+
+ printk(KERN_INFO "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 se_subsystem_dev *su_dev;
+ 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;
+ su_dev = dev->se_sub_dev;
+ hba = su_dev->se_dev_hba;
+
+ cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
+ config_item_name(&hba->hba_group.cg_item),
+ config_item_name(&su_dev->se_dev_group.cg_item));
+ cur_len++; /* Extra byte for NULL terminator */
+
+ if ((cur_len + len) > PAGE_SIZE) {
+ printk(KERN_WARNING "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 struct configfs_item_operations target_core_alua_lu_gp_ops = {
+ .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 (!(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);
+
+ printk(KERN_INFO "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);
+
+ printk(KERN_INFO "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);
+
+ config_item_put(item);
+ core_alua_free_lu_gp(lu_gp);
+}
+
+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_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
+ unsigned long tmp;
+ int new_state, ret;
+
+ if (!(tg_pt_gp->tg_pt_gp_valid_id)) {
+ printk(KERN_ERR "Unable to do implict ALUA on non valid"
+ " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
+ return -EINVAL;
+ }
+
+ ret = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk("Unable to extract new ALUA access state from"
+ " %s\n", page);
+ return -EINVAL;
+ }
+ new_state = (int)tmp;
+
+ if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
+ printk(KERN_ERR "Unable to process implict configfs ALUA"
+ " transition while TPGS_IMPLICT_ALUA is diabled\n");
+ return -EINVAL;
+ }
+
+ ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
+ 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)) {
+ printk(KERN_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 = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract new ALUA access status"
+ " from %s\n", page);
+ return -EINVAL;
+ }
+ new_status = (int)tmp;
+
+ if ((new_status != ALUA_STATUS_NONE) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
+ (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
+ printk(KERN_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_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 = strict_strtoul(page, 0, &tmp);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract alua_write_metadata\n");
+ return -EINVAL;
+ }
+
+ if ((tmp != 0) && (tmp != 1)) {
+ printk(KERN_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);
+
+/*
+ * 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 = strict_strtoul(page, 0, &tg_pt_gp_id);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() returned %d for"
+ " tg_pt_gp_id\n", ret);
+ return -EINVAL;
+ }
+ if (tg_pt_gp_id > 0x0000ffff) {
+ printk(KERN_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;
+
+ printk(KERN_INFO "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_TFO(tpg)->get_fabric_name(),
+ TPG_TFO(tpg)->tpg_get_wwn(tpg),
+ TPG_TFO(tpg)->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) {
+ printk(KERN_WARNING "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_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_preferred.attr,
+ &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
+ &target_core_alua_tg_pt_gp_members.attr,
+ NULL,
+};
+
+static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
+ .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 target_core_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 se_subsystem_dev *su_dev = alua->t10_sub_dev;
+ 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(su_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);
+
+ printk(KERN_INFO "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);
+
+ printk(KERN_INFO "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);
+
+ config_item_put(item);
+ core_alua_free_tg_pt_gp(tg_pt_gp);
+}
+
+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,
+};
+
+static struct config_item_type target_core_alua_tg_pt_gps_cit = {
+ .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+/* End functions for struct config_item_type target_core_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 target_core_hba_cit */
+
+static struct config_group *target_core_call_createdev(
+ struct config_group *group,
+ const char *name)
+{
+ struct t10_alua_tg_pt_gp *tg_pt_gp;
+ struct se_subsystem_dev *se_dev;
+ struct se_hba *hba;
+ struct se_subsystem_api *t;
+ struct config_item *hba_ci;
+ struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
+
+ hba_ci = &group->cg_item;
+ if (!(hba_ci)) {
+ printk(KERN_ERR "Unable to locate config_item hba_ci\n");
+ return NULL;
+ }
+
+ hba = target_core_get_hba_from_item(hba_ci);
+ if (!(hba)) {
+ printk(KERN_ERR "Unable to locate struct se_hba from struct config_item\n");
+ return NULL;
+ }
+ /*
+ * Locate the struct se_subsystem_api from parent's struct se_hba.
+ */
+ t = hba->transport;
+
+ se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
+ if (!(se_dev)) {
+ printk(KERN_ERR "Unable to allocate memory for"
+ " struct se_subsystem_dev\n");
+ core_put_hba(hba);
+ return NULL;
+ }
+ INIT_LIST_HEAD(&se_dev->g_se_dev_list);
+ INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
+ spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
+ INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
+ spin_lock_init(&se_dev->t10_reservation.registration_lock);
+ spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
+ INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
+ spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
+ spin_lock_init(&se_dev->se_dev_lock);
+ se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
+ se_dev->t10_wwn.t10_sub_dev = se_dev;
+ se_dev->t10_alua.t10_sub_dev = se_dev;
+ se_dev->se_dev_attrib.da_sub_dev = se_dev;
+
+ se_dev->se_dev_hba = hba;
+ dev_cg = &se_dev->se_dev_group;
+
+ dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 6,
+ GFP_KERNEL);
+ if (!(dev_cg->default_groups))
+ goto out;
+ /*
+ * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
+ * for ->allocate_virtdevice()
+ *
+ * se_dev->se_dev_ptr will be set after ->create_virtdev()
+ * has been called successfully in the next level up in the
+ * configfs tree for device object's struct config_group. This
+ * pointer is set in target_core_store_dev_fd() and
+ * target_core_store_dev_enable() above depending upon the
+ * reference method for struct scsi_device.
+ */
+ se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
+ if (!(se_dev->se_dev_su_ptr)) {
+ printk(KERN_ERR "Unable to locate subsystem dependent pointer"
+ " from allocate_virtdevice()\n");
+ goto out;
+ }
+ spin_lock(&se_global->g_device_lock);
+ list_add_tail(&se_dev->g_se_dev_list, &se_global->g_se_dev_list);
+ spin_unlock(&se_global->g_device_lock);
+
+ config_group_init_type_name(&se_dev->se_dev_group, name,
+ &target_core_dev_cit);
+ config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
+ &target_core_dev_attrib_cit);
+ config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
+ &target_core_dev_pr_cit);
+ config_group_init_type_name(&se_dev->se_dev_snap_group, "snap",
+ &target_core_dev_snap_cit);
+ config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
+ &target_core_dev_wwn_cit);
+ config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
+ "alua", &target_core_alua_tg_pt_gps_cit);
+ dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
+ dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
+ dev_cg->default_groups[2] = &se_dev->se_dev_snap_group;
+ dev_cg->default_groups[3] = &se_dev->t10_wwn.t10_wwn_group;
+ dev_cg->default_groups[4] = &se_dev->t10_alua.alua_tg_pt_gps_group;
+ dev_cg->default_groups[5] = NULL;
+ /*
+ * Add core/$HBA/$DEV/alua/tg_pt_gps/default_tg_pt_gp
+ */
+ tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
+ if (!(tg_pt_gp))
+ goto out;
+
+ tg_pt_gp_cg = &T10_ALUA(se_dev)->alua_tg_pt_gps_group;
+ tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(tg_pt_gp_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate tg_pt_gp_cg->"
+ "default_groups\n");
+ goto out;
+ }
+
+ 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;
+ T10_ALUA(se_dev)->default_tg_pt_gp = tg_pt_gp;
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
+ " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
+
+ core_put_hba(hba);
+ return &se_dev->se_dev_group;
+out:
+ if (T10_ALUA(se_dev)->default_tg_pt_gp) {
+ core_alua_free_tg_pt_gp(T10_ALUA(se_dev)->default_tg_pt_gp);
+ T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
+ }
+ if (tg_pt_gp_cg)
+ kfree(tg_pt_gp_cg->default_groups);
+ if (dev_cg)
+ kfree(dev_cg->default_groups);
+ if (se_dev->se_dev_su_ptr)
+ t->free_device(se_dev->se_dev_su_ptr);
+ kfree(se_dev);
+ core_put_hba(hba);
+ return NULL;
+}
+
+static void target_core_call_freedev(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
+ struct se_subsystem_dev, se_dev_group);
+ struct se_hba *hba;
+ struct se_subsystem_api *t;
+ struct config_item *df_item;
+ struct config_group *dev_cg, *tg_pt_gp_cg;
+ int i, ret;
+
+ hba = target_core_get_hba_from_item(
+ &se_dev->se_dev_hba->hba_group.cg_item);
+ if (!(hba))
+ goto out;
+
+ t = hba->transport;
+
+ spin_lock(&se_global->g_device_lock);
+ list_del(&se_dev->g_se_dev_list);
+ spin_unlock(&se_global->g_device_lock);
+
+ tg_pt_gp_cg = &T10_ALUA(se_dev)->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(T10_ALUA(se_dev)->default_tg_pt_gp);
+ T10_ALUA(se_dev)->default_tg_pt_gp = NULL;
+
+ dev_cg = &se_dev->se_dev_group;
+ 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);
+ }
+
+ config_item_put(item);
+ /*
+ * This pointer will set when the storage is enabled with:
+ * `echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
+ */
+ if (se_dev->se_dev_ptr) {
+ printk(KERN_INFO "Target_Core_ConfigFS: Calling se_free_"
+ "virtual_device() for se_dev_ptr: %p\n",
+ se_dev->se_dev_ptr);
+
+ ret = se_free_virtual_device(se_dev->se_dev_ptr, hba);
+ if (ret < 0)
+ goto hba_out;
+ } else {
+ /*
+ * Release struct se_subsystem_dev->se_dev_su_ptr..
+ */
+ printk(KERN_INFO "Target_Core_ConfigFS: Calling t->free_"
+ "device() for se_dev_su_ptr: %p\n",
+ se_dev->se_dev_su_ptr);
+
+ t->free_device(se_dev->se_dev_su_ptr);
+ }
+
+ printk(KERN_INFO "Target_Core_ConfigFS: Deallocating se_subsystem"
+ "_dev_t: %p\n", se_dev);
+
+hba_out:
+ core_put_hba(hba);
+out:
+ kfree(se_dev);
+}
+
+static struct configfs_group_operations target_core_hba_group_ops = {
+ .make_group = target_core_call_createdev,
+ .drop_item = target_core_call_freedev,
+};
+
+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 = strict_strtoul(page, 0, &mode_flag);
+ if (ret < 0) {
+ printk(KERN_ERR "Unable to extract hba mode flag: %d\n", ret);
+ return -EINVAL;
+ }
+
+ spin_lock(&hba->device_lock);
+ if (!(list_empty(&hba->hba_dev_list))) {
+ printk(KERN_ERR "Unable to set hba_mode with active devices\n");
+ spin_unlock(&hba->device_lock);
+ return -EINVAL;
+ }
+ spin_unlock(&hba->device_lock);
+
+ 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 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 = {
+ .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) {
+ printk(KERN_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)) {
+ printk(KERN_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 = strict_strtoul(str, 0, &plugin_dep_id);
+ if (ret < 0) {
+ printk(KERN_ERR "strict_strtoul() returned %d for"
+ " plugin_dep_id\n", ret);
+ return ERR_PTR(-EINVAL);
+ }
+ /*
+ * Load up TCM subsystem plugins if they have not already been loaded.
+ */
+ if (transport_subsystem_check_init() < 0)
+ return ERR_PTR(-EINVAL);
+
+ hba = core_alloc_hba();
+ if (!(hba))
+ return ERR_PTR(-EINVAL);
+
+ ret = se_core_add_hba(hba, se_plugin_str, (u32)plugin_dep_id);
+ if (ret < 0)
+ goto out;
+
+ config_group_init_type_name(&hba->hba_group, name,
+ &target_core_hba_cit);
+
+ return &hba->hba_group;
+out:
+ kmem_cache_free(se_hba_cache, hba);
+ return ERR_PTR(ret);
+}
+
+
+static void target_core_call_delhbafromtarget(
+ struct config_group *group,
+ struct config_item *item)
+{
+ struct se_hba *hba = container_of(to_config_group(item), struct se_hba,
+ hba_group);
+
+ config_item_put(item);
+ se_core_del_hba(hba);
+}
+
+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 */
+
+int 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;
+ struct proc_dir_entry *scsi_target_proc = NULL;
+ struct t10_alua_lu_gp *lu_gp;
+ int ret;
+
+ printk(KERN_INFO "TARGET_CORE[0]: Loading Generic Kernel Storage"
+ " Engine: %s on %s/%s on "UTS_RELEASE"\n",
+ TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
+
+ subsys = target_core_subsystem[0];
+ config_group_init(&subsys->su_group);
+ mutex_init(&subsys->su_mutex);
+
+ INIT_LIST_HEAD(&g_tf_list);
+ mutex_init(&g_tf_lock);
+ init_scsi_index_table();
+ ret = init_se_global();
+ if (ret < 0)
+ return -1;
+ /*
+ * 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 = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(target_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate target_cg->default_groups\n");
+ goto out_global;
+ }
+
+ config_group_init_type_name(&se_global->target_core_hbagroup,
+ "core", &target_core_cit);
+ target_cg->default_groups[0] = &se_global->target_core_hbagroup;
+ target_cg->default_groups[1] = NULL;
+ /*
+ * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
+ */
+ hba_cg = &se_global->target_core_hbagroup;
+ hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(hba_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate hba_cg->default_groups\n");
+ goto out_global;
+ }
+ config_group_init_type_name(&se_global->alua_group,
+ "alua", &target_core_alua_cit);
+ hba_cg->default_groups[0] = &se_global->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 = &se_global->alua_group;
+ alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(alua_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate alua_cg->default_groups\n");
+ goto out_global;
+ }
+
+ config_group_init_type_name(&se_global->alua_lu_gps_group,
+ "lu_gps", &target_core_alua_lu_gps_cit);
+ alua_cg->default_groups[0] = &se_global->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 (!(lu_gp))
+ goto out_global;
+
+ lu_gp_cg = &se_global->alua_lu_gps_group;
+ lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
+ GFP_KERNEL);
+ if (!(lu_gp_cg->default_groups)) {
+ printk(KERN_ERR "Unable to allocate lu_gp_cg->default_groups\n");
+ 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;
+ se_global->default_lu_gp = lu_gp;
+ /*
+ * Register the target_core_mod subsystem with configfs.
+ */
+ ret = configfs_register_subsystem(subsys);
+ if (ret < 0) {
+ printk(KERN_ERR "Error %d while registering subsystem %s\n",
+ ret, subsys->su_group.cg_item.ci_namebuf);
+ goto out_global;
+ }
+ printk(KERN_INFO "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;
+
+ if (core_dev_setup_virtual_lun0() < 0)
+ goto out;
+
+ scsi_target_proc = proc_mkdir("scsi_target", 0);
+ if (!(scsi_target_proc)) {
+ printk(KERN_ERR "proc_mkdir(scsi_target, 0) failed\n");
+ goto out;
+ }
+ ret = init_scsi_target_mib();
+ if (ret < 0)
+ goto out;
+
+ return 0;
+
+out:
+ configfs_unregister_subsystem(subsys);
+ if (scsi_target_proc)
+ remove_proc_entry("scsi_target", 0);
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+out_global:
+ if (se_global->default_lu_gp) {
+ core_alua_free_lu_gp(se_global->default_lu_gp);
+ se_global->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_global();
+ return -1;
+}
+
+void target_core_exit_configfs(void)
+{
+ struct configfs_subsystem *subsys;
+ struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
+ struct config_item *item;
+ int i;
+
+ se_global->in_shutdown = 1;
+ subsys = target_core_subsystem[0];
+
+ lu_gp_cg = &se_global->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);
+ core_alua_free_lu_gp(se_global->default_lu_gp);
+ se_global->default_lu_gp = NULL;
+
+ alua_cg = &se_global->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);
+
+ hba_cg = &se_global->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);
+
+ for (i = 0; subsys->su_group.default_groups[i]; i++) {
+ item = &subsys->su_group.default_groups[i]->cg_item;
+ subsys->su_group.default_groups[i] = NULL;
+ config_item_put(item);
+ }
+ kfree(subsys->su_group.default_groups);
+
+ configfs_unregister_subsystem(subsys);
+ printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric"
+ " Infrastructure\n");
+
+ remove_scsi_target_mib();
+ remove_proc_entry("scsi_target", 0);
+ core_dev_release_virtual_lun0();
+ rd_module_exit();
+ release_se_global();
+
+ return;
+}
+
+MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
+MODULE_AUTHOR("nab@xxxxxxxxxxxxxxx");
+MODULE_LICENSE("GPL");
+
+module_init(target_core_init_configfs);
+module_exit(target_core_exit_configfs);
diff --git a/include/target/target_core_configfs.h b/include/target/target_core_configfs.h
new file mode 100644
index 0000000..3cb97f9
--- /dev/null
+++ b/include/target/target_core_configfs.h
@@ -0,0 +1,57 @@
+#define TARGET_CORE_CONFIGFS_VERSION TARGET_CORE_MOD_VERSION
+
+#define TARGET_CORE_CONFIG_ROOT "/sys/kernel/config"
+
+#define TARGET_CORE_NAME_MAX_LEN 64
+#define TARGET_FABRIC_NAME_SIZE 32
+
+extern struct se_global *se_global;
+
+extern struct se_hba *target_core_get_hba_from_item(struct config_item *);
+extern struct target_fabric_configfs *target_fabric_configfs_init(
+ struct module *, const char *);
+extern void target_fabric_configfs_free(struct target_fabric_configfs *);
+extern int target_fabric_configfs_register(struct target_fabric_configfs *);
+extern void target_fabric_configfs_deregister(struct target_fabric_configfs *);
+extern int target_core_init_configfs(void);
+extern void target_core_exit_configfs(void);
+
+struct target_fabric_configfs_template {
+ struct config_item_type tfc_discovery_cit;
+ struct config_item_type tfc_wwn_cit;
+ struct config_item_type tfc_tpg_cit;
+ struct config_item_type tfc_tpg_base_cit;
+ struct config_item_type tfc_tpg_lun_cit;
+ struct config_item_type tfc_tpg_port_cit;
+ struct config_item_type tfc_tpg_np_cit;
+ struct config_item_type tfc_tpg_np_base_cit;
+ struct config_item_type tfc_tpg_attrib_cit;
+ struct config_item_type tfc_tpg_param_cit;
+ struct config_item_type tfc_tpg_nacl_cit;
+ struct config_item_type tfc_tpg_nacl_base_cit;
+ struct config_item_type tfc_tpg_nacl_attrib_cit;
+ struct config_item_type tfc_tpg_nacl_auth_cit;
+ struct config_item_type tfc_tpg_nacl_param_cit;
+ struct config_item_type tfc_tpg_mappedlun_cit;
+};
+
+struct target_fabric_configfs {
+ char tf_name[TARGET_FABRIC_NAME_SIZE];
+ atomic_t tf_access_cnt;
+ struct list_head tf_list;
+ struct config_group tf_group;
+ struct config_group tf_disc_group;
+ struct config_group *tf_default_groups[2];
+ /* Pointer to fabric's config_item */
+ struct config_item *tf_fabric;
+ /* Passed from fabric modules */
+ struct config_item_type *tf_fabric_cit;
+ /* Pointer to target core subsystem */
+ struct configfs_subsystem *tf_subsys;
+ /* Pointer to fabric's struct module */
+ struct module *tf_module;
+ struct target_core_fabric_ops tf_ops;
+ struct target_fabric_configfs_template tf_cit_tmpl;
+};
+
+#define TF_CIT_TMPL(tf) (&(tf)->tf_cit_tmpl)
--
1.7.2.2
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