diff options
Diffstat (limited to 'drivers/target/target_core_configfs.c')
| -rw-r--r-- | drivers/target/target_core_configfs.c | 3240 |
1 files changed, 3240 insertions, 0 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c new file mode 100644 index 00000000000..caf8dc18ee0 --- /dev/null +++ b/drivers/target/target_core_configfs.c @@ -0,0 +1,3240 @@ +/******************************************************************************* + * 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@kernel.org> + * + * based on configfs Copyright (C) 2005 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + ****************************************************************************/ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <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/parser.h> +#include <linux/syscalls.h> +#include <linux/configfs.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" + +static struct list_head g_tf_list; +static 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); +}; + +static inline struct se_hba * +item_to_hba(struct config_item *item) +{ + return container_of(to_config_group(item), struct se_hba, hba_group); +} + +/* + * Attributes for /sys/kernel/config/target/ + */ +static ssize_t target_core_attr_show(struct config_item *item, + struct configfs_attribute *attr, + char *page) +{ + return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" + " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, + utsname()->sysname, utsname()->machine); +} + +static struct configfs_item_operations target_core_fabric_item_ops = { + .show_attribute = target_core_attr_show, +}; + +static struct configfs_attribute target_core_item_attr_version = { + .ca_owner = THIS_MODULE, + .ca_name = "version", + .ca_mode = S_IRUGO, +}; + +static struct target_fabric_configfs *target_core_get_fabric( + const char *name) +{ + struct target_fabric_configfs *tf; + + if (!(name)) + return NULL; + + mutex_lock(&g_tf_lock); + list_for_each_entry(tf, &g_tf_list, tf_list) { + if (!(strcmp(tf->tf_name, name))) { + atomic_inc(&tf->tf_access_cnt); + mutex_unlock(&g_tf_lock); + return tf; + } + } + mutex_unlock(&g_tf_lock); + + return NULL; +} + +/* + * Called from struct target_core_group_ops->make_group() + */ +static struct config_group *target_core_register_fabric( + struct config_group *group, + const char *name) +{ + struct target_fabric_configfs *tf; + int ret; + + 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); + + /* + * 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); + 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); + return ERR_PTR(-EINVAL); + } + } + + tf = target_core_get_fabric(name); + if (!(tf)) { + printk(KERN_ERR "target_core_get_fabric() failed for %s\n", + name); + 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); + +/* + * Perform a sanity check of the passed tf->tf_ops before completing + * TCM fabric module registration. + */ +static int target_fabric_tf_ops_check( + struct target_fabric_configfs *tf) +{ + struct target_core_fabric_ops *tfo = &tf->tf_ops; + + if (!(tfo->get_fabric_name)) { + printk(KERN_ERR "Missing tfo->get_fabric_name()\n"); + return -EINVAL; + } + if (!(tfo->get_fabric_proto_ident)) { + printk(KERN_ERR "Missing tfo->get_fabric_proto_ident()\n"); + return -EINVAL; + } + if (!(tfo->tpg_get_wwn)) { + printk(KERN_ERR "Missing tfo->tpg_get_wwn()\n"); + return -EINVAL; + } + if (!(tfo->tpg_get_tag)) { + printk(KERN_ERR "Missing tfo->tpg_get_tag()\n"); + return -EINVAL; + } + if (!(tfo->tpg_get_default_depth)) { + printk(KERN_ERR "Missing tfo->tpg_get_default_depth()\n"); + return -EINVAL; + } + if (!(tfo->tpg_get_pr_transport_id)) { + printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id()\n"); + return -EINVAL; + } + if (!(tfo->tpg_get_pr_transport_id_len)) { + printk(KERN_ERR "Missing tfo->tpg_get_pr_transport_id_len()\n"); + return -EINVAL; + } + if (!(tfo->tpg_check_demo_mode)) { + printk(KERN_ERR "Missing tfo->tpg_check_demo_mode()\n"); + return -EINVAL; + } + if (!(tfo->tpg_check_demo_mode_cache)) { + printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_cache()\n"); + return -EINVAL; + } + if (!(tfo->tpg_check_demo_mode_write_protect)) { + printk(KERN_ERR "Missing tfo->tpg_check_demo_mode_write_protect()\n"); + return -EINVAL; + } + if (!(tfo->tpg_check_prod_mode_write_protect)) { + printk(KERN_ERR "Missing tfo->tpg_check_prod_mode_write_protect()\n"); + return -EINVAL; + } + if (!(tfo->tpg_alloc_fabric_acl)) { + printk(KERN_ERR "Missing tfo->tpg_alloc_fabric_acl()\n"); + return -EINVAL; + } + if (!(tfo->tpg_release_fabric_acl)) { + printk(KERN_ERR "Missing tfo->tpg_release_fabric_acl()\n"); + return -EINVAL; + } + if (!(tfo->tpg_get_inst_index)) { + printk(KERN_ERR "Missing tfo->tpg_get_inst_index()\n"); + return -EINVAL; + } + if (!(tfo->release_cmd_to_pool)) { + printk(KERN_ERR "Missing tfo->release_cmd_to_pool()\n"); + return -EINVAL; + } + if (!(tfo->release_cmd_direct)) { + printk(KERN_ERR "Missing tfo->release_cmd_direct()\n"); + return -EINVAL; + } + if (!(tfo->shutdown_session)) { + printk(KERN_ERR "Missing tfo->shutdown_session()\n"); + return -EINVAL; + } + if (!(tfo->close_session)) { + printk(KERN_ERR "Missing tfo->close_session()\n"); + return -EINVAL; + } + if (!(tfo->stop_session)) { + printk(KERN_ERR "Missing tfo->stop_session()\n"); + return -EINVAL; + } + if (!(tfo->fall_back_to_erl0)) { + printk(KERN_ERR "Missing tfo->fall_back_to_erl0()\n"); + return -EINVAL; + } + if (!(tfo->sess_logged_in)) { + printk(KERN_ERR "Missing tfo->sess_logged_in()\n"); + return -EINVAL; + } + if (!(tfo->sess_get_index)) { + printk(KERN_ERR "Missing tfo->sess_get_index()\n"); + return -EINVAL; + } + if (!(tfo->write_pending)) { + printk(KERN_ERR "Missing tfo->write_pending()\n"); + return -EINVAL; + } + if (!(tfo->write_pending_status)) { + printk(KERN_ERR "Missing tfo->write_pending_status()\n"); + return -EINVAL; + } + if (!(tfo->set_default_node_attributes)) { + printk(KERN_ERR "Missing tfo->set_default_node_attributes()\n"); + return -EINVAL; + } + if (!(tfo->get_task_tag)) { + printk(KERN_ERR "Missing tfo->get_task_tag()\n"); + return -EINVAL; + } + if (!(tfo->get_cmd_state)) { + printk(KERN_ERR "Missing tfo->get_cmd_state()\n"); + return -EINVAL; + } + if (!(tfo->new_cmd_failure)) { + printk(KERN_ERR "Missing tfo->new_cmd_failure()\n"); + return -EINVAL; + } + if (!(tfo->queue_data_in)) { + printk(KERN_ERR "Missing tfo->queue_data_in()\n"); + return -EINVAL; + } + if (!(tfo->queue_status)) { + printk(KERN_ERR "Missing tfo->queue_status()\n"); + return -EINVAL; + } + if (!(tfo->queue_tm_rsp)) { + printk(KERN_ERR "Missing tfo->queue_tm_rsp()\n"); + return -EINVAL; + } + if (!(tfo->set_fabric_sense_len)) { + printk(KERN_ERR "Missing tfo->set_fabric_sense_len()\n"); + return -EINVAL; + } + if (!(tfo->get_fabric_sense_len)) { + printk(KERN_ERR "Missing tfo->get_fabric_sense_len()\n"); + return -EINVAL; + } + if (!(tfo->is_state_remove)) { + printk(KERN_ERR "Missing tfo->is_state_remove()\n"); + return -EINVAL; + } + if (!(tfo->pack_lun)) { + printk(KERN_ERR "Missing tfo->pack_lun()\n"); + return -EINVAL; + } + /* + * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() + * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in + * target_core_fabric_configfs.c WWN+TPG group context code. + */ + if (!(tfo->fabric_make_wwn)) { + printk(KERN_ERR "Missing tfo->fabric_make_wwn()\n"); + return -EINVAL; + } + if (!(tfo->fabric_drop_wwn)) { + printk(KERN_ERR "Missing tfo->fabric_drop_wwn()\n"); + return -EINVAL; + } + if (!(tfo->fabric_make_tpg)) { + printk(KERN_ERR "Missing tfo->fabric_make_tpg()\n"); + return -EINVAL; + } + if (!(tfo->fabric_drop_tpg)) { + printk(KERN_ERR "Missing tfo->fabric_drop_tpg()\n"); + return -EINVAL; + } + + return 0; +} + +/* + * 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; + int ret; + + 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; + } + ret = target_fabric_tf_ops_check(tf); + if (ret < 0) + return ret; + + 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) { \ + spin_unlock(&se_dev->se_dev_lock); \ + 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(emulate_tpu); +SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); + +DEF_DEV_ATTRIB(emulate_tpws); +SE_DEV_ATTR(emulate_tpws, 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(optimal_sectors); +SE_DEV_ATTR(optimal_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); + +DEF_DEV_ATTRIB(max_unmap_lba_count); +SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); + +DEF_DEV_ATTRIB(max_unmap_block_desc_count); +SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); + +DEF_DEV_ATTRIB(unmap_granularity); +SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); + +DEF_DEV_ATTRIB(unmap_granularity_alignment); +SE_DEV_ATTR(unmap_granularity_alignment, 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_emulate_tpu.attr, + &target_core_dev_attrib_emulate_tpws.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_optimal_sectors.attr, + &target_core_dev_attrib_hw_queue_depth.attr, + &target_core_dev_attrib_queue_depth.attr, + &target_core_dev_attrib_task_timeout.attr, + &target_core_dev_attrib_max_unmap_lba_count.attr, + &target_core_dev_attrib_max_unmap_block_desc_count.attr, + &target_core_dev_attrib_unmap_granularity.attr, + &target_core_dev_attrib_unmap_granularity_alignment.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); + + 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"); +} + +enum { + Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, + Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, + Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, + Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err +}; + +static match_table_t tokens = { + {Opt_initiator_fabric, "initiator_fabric=%s"}, + {Opt_initiator_node, "initiator_node=%s"}, + {Opt_initiator_sid, "initiator_sid=%s"}, + {Opt_sa_res_key, "sa_res_key=%s"}, + {Opt_res_holder, "res_holder=%d"}, + {Opt_res_type, "res_type=%d"}, + {Opt_res_scope, "res_scope=%d"}, + {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, + {Opt_mapped_lun, "mapped_lun=%d"}, + {Opt_target_fabric, "target_fabric=%s"}, + {Opt_target_node, "target_node=%s"}, + {Opt_tpgt, "tpgt=%d"}, + {Opt_port_rtpi, "port_rtpi=%d"}, + {Opt_target_lun, "target_lun=%d"}, + {Opt_err, NULL} +}; + +static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( + struct se_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 *orig, *ptr, *arg_p, *opts; + substring_t args[MAX_OPT_ARGS]; + unsigned long long tmp_ll; + u64 sa_res_key = 0; + u32 mapped_lun = 0, target_lun = 0; + int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; + u16 port_rpti = 0, tpgt = 0; + u8 type = 0, scope; + + 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; + } + + opts = kstrdup(page, GFP_KERNEL); + if (!opts) + return -ENOMEM; + + orig = opts; + while ((ptr = strsep(&opts, ",")) != NULL) { + if (!*ptr) + continue; + + token = match_token(ptr, tokens, args); + switch (token) { + case Opt_initiator_fabric: + i_fabric = match_strdup(&args[0]); + break; + case Opt_initiator_node: + i_port = match_strdup(&args[0]); + if (strlen(i_port) > 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 = -EINVAL; + break; + } + break; + case Opt_initiator_sid: + isid = match_strdup(&args[0]); + if (strlen(isid) > PR_REG_ISID_LEN) { + printk(KERN_ERR "APTPL metadata initiator_isid" + "= exceeds PR_REG_ISID_LEN: %d\n", + PR_REG_ISID_LEN); + ret = -EINVAL; + break; + } + break; + case Opt_sa_res_key: + arg_p = match_strdup(&args[0]); + ret = strict_strtoull(arg_p, 0, &tmp_ll); + if (ret < 0) { + printk(KERN_ERR "strict_strtoull() failed for" + " sa_res_key=\n"); + goto out; + } + sa_res_key = (u64)tmp_ll; + break; + /* + * PR APTPL Metadata for Reservation + */ + case Opt_res_holder: + match_int(args, &arg); + res_holder = arg; + break; + case Opt_res_type: + match_int(args, &arg); + type = (u8)arg; + break; + case Opt_res_scope: + match_int(args, &arg); + scope = (u8)arg; + break; + case Opt_res_all_tg_pt: + match_int(args, &arg); + all_tg_pt = (int)arg; + break; + case Opt_mapped_lun: + match_int(args, &arg); + mapped_lun = (u32)arg; + break; + /* + * PR APTPL Metadata for Target Port + */ + case Opt_target_fabric: + t_fabric = match_strdup(&args[0]); + break; + case Opt_target_node: + t_port = match_strdup(&args[0]); + if (strlen(t_port) > 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 = -EINVAL; + break; + } + break; + case Opt_tpgt: + match_int(args, &arg); + tpgt = (u16)arg; + break; + case Opt_port_rtpi: + match_int(args, &arg); + port_rpti = (u16)arg; + break; + case Opt_target_lun: + match_int(args, &arg); + target_lun = (u32)arg; + break; + default: + break; + } + } + + if (!(i_port) || !(t_port) || !(sa_res_key)) { + printk(KERN_ERR "Illegal parameters for APTPL registration\n"); + ret = -EINVAL; + goto out; + } + + if (res_holder && !(type)) { + printk(KERN_ERR "Illegal PR type: 0x%02x for reservation" + " holder\n", type); + ret = -EINVAL; + 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(orig); + return (ret == 0) ? count : ret; +} + +SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); + +CONFIGFS_EATTR_OPS(target_core_dev_pr, se_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_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_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_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 se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); + struct se_subsystem_api *t = hba->transport; + struct config_group *dev_cg = &se_dev->se_dev_group; + + kfree(dev_cg->default_groups); + /* + * 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); + + se_free_virtual_device(se_dev->se_dev_ptr, hba); + } 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); + kfree(se_dev); +} + +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 void target_core_alua_lu_gp_release(struct config_item *item) +{ + struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), + struct t10_alua_lu_gp, lu_gp_group); + + core_alua_free_lu_gp(lu_gp); +} + +static struct configfs_item_operations target_core_alua_lu_gp_ops = { + .release = target_core_alua_lu_gp_release, + .show_attribute = target_core_alua_lu_gp_attr_show, + .store_attribute = target_core_alua_lu_gp_attr_store, +}; + +static struct config_item_type target_core_alua_lu_gp_cit = { + .ct_item_ops = &target_core_alua_lu_gp_ops, + .ct_attrs = target_core_alua_lu_gp_attrs, + .ct_owner = THIS_MODULE, +}; + +/* End functions for struct config_item_type target_core_alua_lu_gp_cit */ + +/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ + +static struct config_group *target_core_alua_create_lu_gp( + struct config_group *group, + const char *name) +{ + struct t10_alua_lu_gp *lu_gp; + struct config_group *alua_lu_gp_cg = NULL; + struct config_item *alua_lu_gp_ci = NULL; + + lu_gp = core_alua_allocate_lu_gp(name, 0); + if (IS_ERR(lu_gp)) + return NULL; + + alua_lu_gp_cg = &lu_gp->lu_gp_group; + alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; + + config_group_init_type_name(alua_lu_gp_cg, name, + &target_core_alua_lu_gp_cit); + + 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); + /* + * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release() + * -> target_core_alua_lu_gp_release() + */ + config_item_put(item); +} + +static struct configfs_group_operations target_core_alua_lu_gps_group_ops = { + .make_group = &target_core_alua_create_lu_gp, + .drop_item = &target_core_alua_drop_lu_gp, +}; + +static struct config_item_type target_core_alua_lu_gps_cit = { + .ct_item_ops = NULL, + .ct_group_ops = &target_core_alua_lu_gps_group_ops, + .ct_owner = THIS_MODULE, +}; + +/* End functions for struct config_item_type target_core_alua_lu_gps_cit */ + +/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ + +CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); +#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ +static struct target_core_alua_tg_pt_gp_attribute \ + target_core_alua_tg_pt_gp_##_name = \ + __CONFIGFS_EATTR(_name, _mode, \ + target_core_alua_tg_pt_gp_show_attr_##_name, \ + target_core_alua_tg_pt_gp_store_attr_##_name); + +#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ +static struct target_core_alua_tg_pt_gp_attribute \ + target_core_alua_tg_pt_gp_##_name = \ + __CONFIGFS_EATTR_RO(_name, \ + target_core_alua_tg_pt_gp_show_attr_##_name); + +/* + * alua_access_state + */ +static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( + struct t10_alua_tg_pt_gp *tg_pt_gp, + char *page) +{ + return sprintf(page, "%d\n", + atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); +} + +static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( + struct t10_alua_tg_pt_gp *tg_pt_gp, + const char *page, + size_t count) +{ + struct se_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 void target_core_alua_tg_pt_gp_release(struct config_item *item) +{ + struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), + struct t10_alua_tg_pt_gp, tg_pt_gp_group); + + core_alua_free_tg_pt_gp(tg_pt_gp); +} + +static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { + .release = target_core_alua_tg_pt_gp_release, + .show_attribute = target_core_alua_tg_pt_gp_attr_show, + .store_attribute = target_core_alua_tg_pt_gp_attr_store, +}; + +static struct config_item_type target_core_alua_tg_pt_gp_cit = { + .ct_item_ops = &target_core_alua_tg_pt_gp_ops, + .ct_attrs = target_core_alua_tg_pt_gp_attrs, + .ct_owner = THIS_MODULE, +}; + +/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ + +/* Start functions for struct config_item_type 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); + /* + * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release() + * -> target_core_alua_tg_pt_gp_release(). + */ + config_item_put(item); +} + +static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = { + .make_group = &target_core_alua_create_tg_pt_gp, + .drop_item = &target_core_alua_drop_tg_pt_gp, +}; + +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_make_subdev( + struct config_group *group, + const char *name) +{ + struct t10_alua_tg_pt_gp *tg_pt_gp; + struct se_subsystem_dev *se_dev; + struct se_subsystem_api *t; + struct config_item *hba_ci = &group->cg_item; + struct se_hba *hba = item_to_hba(hba_ci); + struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; + + if (mutex_lock_interruptible(&hba->hba_access_mutex)) + 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"); + goto unlock; + } + 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. + */ + 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->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->t10_wwn.t10_wwn_group; + dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; + dev_cg->default_groups[4] = 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); + + mutex_unlock(&hba->hba_access_mutex); + 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); +unlock: + mutex_unlock(&hba->hba_access_mutex); + return NULL; +} + +static void target_core_drop_subdev( + 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; + + hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); + + mutex_lock(&hba->hba_access_mutex); + 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() is called from ->default_tg_pt_gp + * directly from target_core_alua_tg_pt_gp_release(). + */ + 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); + } + /* + * The releasing of se_dev and associated se_dev->se_dev_ptr is done + * from target_core_dev_item_ops->release() ->target_core_dev_release(). + */ + config_item_put(item); + mutex_unlock(&hba->hba_access_mutex); +} + +static struct configfs_group_operations target_core_hba_group_ops = { + .make_group = target_core_make_subdev, + .drop_item = target_core_drop_subdev, +}; + +CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); +#define SE_HBA_ATTR(_name, _mode) \ +static struct target_core_hba_attribute \ + target_core_hba_##_name = \ + __CONFIGFS_EATTR(_name, _mode, \ + target_core_hba_show_attr_##_name, \ + target_core_hba_store_attr_##_name); + +#define SE_HBA_ATTR_RO(_name) \ +static struct target_core_hba_attribute \ + target_core_hba_##_name = \ + __CONFIGFS_EATTR_RO(_name, \ + target_core_hba_show_attr_##_name); + +static ssize_t target_core_hba_show_attr_hba_info( + struct se_hba *hba, + char *page) +{ + return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", + hba->hba_id, hba->transport->name, + TARGET_CORE_CONFIGFS_VERSION); +} + +SE_HBA_ATTR_RO(hba_info); + +static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, + char *page) +{ + int hba_mode = 0; + + if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) + hba_mode = 1; + + return sprintf(page, "%d\n", hba_mode); +} + +static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, + const char *page, size_t count) +{ + struct se_subsystem_api *transport = hba->transport; + unsigned long mode_flag; + int ret; + + if (transport->pmode_enable_hba == NULL) + return -EINVAL; + + ret = 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 void target_core_hba_release(struct config_item *item) +{ + struct se_hba *hba = container_of(to_config_group(item), + struct se_hba, hba_group); + core_delete_hba(hba); +} + +static struct configfs_attribute *target_core_hba_attrs[] = { + &target_core_hba_hba_info.attr, + &target_core_hba_hba_mode.attr, + NULL, +}; + +static struct configfs_item_operations target_core_hba_item_ops = { + .release = target_core_hba_release, + .show_attribute = target_core_hba_attr_show, + .store_attribute = target_core_hba_attr_store, +}; + +static struct config_item_type target_core_hba_cit = { + .ct_item_ops = &target_core_hba_item_ops, + .ct_group_ops = &target_core_hba_group_ops, + .ct_attrs = target_core_hba_attrs, + .ct_owner = THIS_MODULE, +}; + +static struct config_group *target_core_call_addhbatotarget( + struct config_group *group, + const char *name) +{ + char *se_plugin_str, *str, *str2; + struct se_hba *hba; + char buf[TARGET_CORE_NAME_MAX_LEN]; + unsigned long plugin_dep_id = 0; + int ret; + + memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); + if (strlen(name) > TARGET_CORE_NAME_MAX_LEN) { + 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(se_plugin_str, plugin_dep_id, 0); + if (IS_ERR(hba)) + return ERR_CAST(hba); + + config_group_init_type_name(&hba->hba_group, name, + &target_core_hba_cit); + + return &hba->hba_group; +} + +static void target_core_call_delhbafromtarget( + struct config_group *group, + struct config_item *item) +{ + /* + * core_delete_hba() is called from target_core_hba_item_ops->release() + * -> target_core_hba_release() + */ + config_item_put(item); +} + +static struct configfs_group_operations target_core_group_ops = { + .make_group = target_core_call_addhbatotarget, + .drop_item = target_core_call_delhbafromtarget, +}; + +static struct config_item_type target_core_cit = { + .ct_item_ops = NULL, + .ct_group_ops = &target_core_group_ops, + .ct_attrs = NULL, + .ct_owner = THIS_MODULE, +}; + +/* Stop functions for struct config_item_type target_core_hba_cit */ + +static 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 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 (IS_ERR(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; + + return 0; + +out: + configfs_unregister_subsystem(subsys); + 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; +} + +static 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); + lu_gp_cg->default_groups = 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); + alua_cg->default_groups = NULL; + + 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); + hba_cg->default_groups = NULL; + /* + * We expect subsys->su_group.default_groups to be released + * by configfs subsystem provider logic.. + */ + configfs_unregister_subsystem(subsys); + kfree(subsys->su_group.default_groups); + + core_alua_free_lu_gp(se_global->default_lu_gp); + se_global->default_lu_gp = NULL; + + printk(KERN_INFO "TARGET_CORE[0]: Released ConfigFS Fabric" + " Infrastructure\n"); + + core_dev_release_virtual_lun0(); + rd_module_exit(); + release_se_global(); + + return; +} + +MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS"); +MODULE_AUTHOR("nab@Linux-iSCSI.org"); +MODULE_LICENSE("GPL"); + +module_init(target_core_init_configfs); +module_exit(target_core_exit_configfs); |