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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*******************************************************************************
- * Filename: target_core_configfs.c
- *
- * This file contains ConfigFS logic for the Generic Target Engine project.
- *
- * (c) Copyright 2008-2013 Datera, Inc.
- *
- * Nicholas A. Bellinger <nab@kernel.org>
- *
- * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
- *
- ****************************************************************************/
- #include <linux/module.h>
- #include <linux/moduleparam.h>
- #include <generated/utsrelease.h>
- #include <linux/utsname.h>
- #include <linux/init.h>
- #include <linux/fs.h>
- #include <linux/namei.h>
- #include <linux/slab.h>
- #include <linux/types.h>
- #include <linux/delay.h>
- #include <linux/unistd.h>
- #include <linux/string.h>
- #include <linux/parser.h>
- #include <linux/syscalls.h>
- #include <linux/configfs.h>
- #include <linux/spinlock.h>
- #include <target/target_core_base.h>
- #include <target/target_core_backend.h>
- #include <target/target_core_fabric.h>
- #include "target_core_internal.h"
- #include "target_core_alua.h"
- #include "target_core_pr.h"
- #include "target_core_rd.h"
- #include "target_core_xcopy.h"
- #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
- static void target_core_setup_##_name##_cit(struct target_backend *tb) \
- { \
- struct config_item_type *cit = &tb->tb_##_name##_cit; \
- \
- cit->ct_item_ops = _item_ops; \
- cit->ct_group_ops = _group_ops; \
- cit->ct_attrs = _attrs; \
- cit->ct_owner = tb->ops->owner; \
- pr_debug("Setup generic %s\n", __stringify(_name)); \
- }
- #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
- static void target_core_setup_##_name##_cit(struct target_backend *tb) \
- { \
- struct config_item_type *cit = &tb->tb_##_name##_cit; \
- \
- cit->ct_item_ops = _item_ops; \
- cit->ct_group_ops = _group_ops; \
- cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
- cit->ct_owner = tb->ops->owner; \
- pr_debug("Setup generic %s\n", __stringify(_name)); \
- }
- extern struct t10_alua_lu_gp *default_lu_gp;
- static LIST_HEAD(g_tf_list);
- static DEFINE_MUTEX(g_tf_lock);
- static struct config_group target_core_hbagroup;
- static struct config_group alua_group;
- static struct config_group alua_lu_gps_group;
- static inline struct se_hba *
- item_to_hba(struct config_item *item)
- {
- return container_of(to_config_group(item), struct se_hba, hba_group);
- }
- /*
- * Attributes for /sys/kernel/config/target/
- */
- static ssize_t target_core_item_version_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
- " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
- utsname()->sysname, utsname()->machine);
- }
- CONFIGFS_ATTR_RO(target_core_item_, version);
- char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
- static char db_root_stage[DB_ROOT_LEN];
- static ssize_t target_core_item_dbroot_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "%s\n", db_root);
- }
- static ssize_t target_core_item_dbroot_store(struct config_item *item,
- const char *page, size_t count)
- {
- ssize_t read_bytes;
- struct file *fp;
- mutex_lock(&g_tf_lock);
- if (!list_empty(&g_tf_list)) {
- mutex_unlock(&g_tf_lock);
- pr_err("db_root: cannot be changed: target drivers registered");
- return -EINVAL;
- }
- if (count > (DB_ROOT_LEN - 1)) {
- mutex_unlock(&g_tf_lock);
- pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
- (int)count, DB_ROOT_LEN - 1);
- return -EINVAL;
- }
- read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
- if (!read_bytes) {
- mutex_unlock(&g_tf_lock);
- return -EINVAL;
- }
- if (db_root_stage[read_bytes - 1] == '\n')
- db_root_stage[read_bytes - 1] = '\0';
- /* validate new db root before accepting it */
- fp = filp_open(db_root_stage, O_RDONLY, 0);
- if (IS_ERR(fp)) {
- mutex_unlock(&g_tf_lock);
- pr_err("db_root: cannot open: %s\n", db_root_stage);
- return -EINVAL;
- }
- if (!S_ISDIR(file_inode(fp)->i_mode)) {
- filp_close(fp, NULL);
- mutex_unlock(&g_tf_lock);
- pr_err("db_root: not a directory: %s\n", db_root_stage);
- return -EINVAL;
- }
- filp_close(fp, NULL);
- strncpy(db_root, db_root_stage, read_bytes);
- mutex_unlock(&g_tf_lock);
- pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
- return read_bytes;
- }
- CONFIGFS_ATTR(target_core_item_, dbroot);
- 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) {
- const char *cmp_name = tf->tf_ops->fabric_alias;
- if (!cmp_name)
- cmp_name = tf->tf_ops->fabric_name;
- if (!strcmp(cmp_name, name)) {
- atomic_inc(&tf->tf_access_cnt);
- mutex_unlock(&g_tf_lock);
- return tf;
- }
- }
- mutex_unlock(&g_tf_lock);
- return NULL;
- }
- /*
- * Called from struct target_core_group_ops->make_group()
- */
- static struct config_group *target_core_register_fabric(
- struct config_group *group,
- const char *name)
- {
- struct target_fabric_configfs *tf;
- int ret;
- pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
- " %s\n", group, name);
- tf = target_core_get_fabric(name);
- if (!tf) {
- pr_debug("target_core_register_fabric() trying autoload for %s\n",
- name);
- /*
- * Below are some hardcoded request_module() calls to automatically
- * local fabric modules when the following is called:
- *
- * mkdir -p /sys/kernel/config/target/$MODULE_NAME
- *
- * Note that this does not limit which TCM fabric module can be
- * registered, but simply provids auto loading logic for modules with
- * mkdir(2) system calls with known TCM fabric modules.
- */
- if (!strncmp(name, "iscsi", 5)) {
- /*
- * Automatically load the LIO Target fabric module when the
- * following is called:
- *
- * mkdir -p $CONFIGFS/target/iscsi
- */
- ret = request_module("iscsi_target_mod");
- if (ret < 0) {
- pr_debug("request_module() failed for"
- " iscsi_target_mod.ko: %d\n", ret);
- return ERR_PTR(-EINVAL);
- }
- } else if (!strncmp(name, "loopback", 8)) {
- /*
- * Automatically load the tcm_loop fabric module when the
- * following is called:
- *
- * mkdir -p $CONFIGFS/target/loopback
- */
- ret = request_module("tcm_loop");
- if (ret < 0) {
- pr_debug("request_module() failed for"
- " tcm_loop.ko: %d\n", ret);
- return ERR_PTR(-EINVAL);
- }
- }
- tf = target_core_get_fabric(name);
- }
- if (!tf) {
- pr_debug("target_core_get_fabric() failed for %s\n",
- name);
- return ERR_PTR(-EINVAL);
- }
- pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
- " %s\n", tf->tf_ops->fabric_name);
- /*
- * On a successful target_core_get_fabric() look, the returned
- * struct target_fabric_configfs *tf will contain a usage reference.
- */
- pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
- &tf->tf_wwn_cit);
- config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
- config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
- &tf->tf_discovery_cit);
- configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
- pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
- config_item_name(&tf->tf_group.cg_item));
- 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);
- pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
- " tf list\n", config_item_name(item));
- pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
- " %s\n", tf->tf_ops->fabric_name);
- atomic_dec(&tf->tf_access_cnt);
- pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
- " %s\n", config_item_name(item));
- configfs_remove_default_groups(&tf->tf_group);
- 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,
- &target_core_item_attr_dbroot,
- NULL,
- };
- /*
- * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
- */
- static const struct config_item_type target_core_fabrics_item = {
- .ct_group_ops = &target_core_fabric_group_ops,
- .ct_attrs = target_core_fabric_item_attrs,
- .ct_owner = THIS_MODULE,
- };
- static struct configfs_subsystem target_core_fabrics = {
- .su_group = {
- .cg_item = {
- .ci_namebuf = "target",
- .ci_type = &target_core_fabrics_item,
- },
- },
- };
- int target_depend_item(struct config_item *item)
- {
- return configfs_depend_item(&target_core_fabrics, item);
- }
- EXPORT_SYMBOL(target_depend_item);
- void target_undepend_item(struct config_item *item)
- {
- return configfs_undepend_item(item);
- }
- EXPORT_SYMBOL(target_undepend_item);
- /*##############################################################################
- // Start functions called by external Target Fabrics Modules
- //############################################################################*/
- static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
- {
- if (tfo->fabric_alias) {
- if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
- pr_err("Passed alias: %s exceeds "
- "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
- return -EINVAL;
- }
- }
- if (!tfo->fabric_name) {
- pr_err("Missing tfo->fabric_name\n");
- return -EINVAL;
- }
- if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
- pr_err("Passed name: %s exceeds "
- "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
- return -EINVAL;
- }
- if (!tfo->tpg_get_wwn) {
- pr_err("Missing tfo->tpg_get_wwn()\n");
- return -EINVAL;
- }
- if (!tfo->tpg_get_tag) {
- pr_err("Missing tfo->tpg_get_tag()\n");
- return -EINVAL;
- }
- if (!tfo->tpg_check_demo_mode) {
- pr_err("Missing tfo->tpg_check_demo_mode()\n");
- return -EINVAL;
- }
- if (!tfo->tpg_check_demo_mode_cache) {
- pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
- return -EINVAL;
- }
- if (!tfo->tpg_check_demo_mode_write_protect) {
- pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
- return -EINVAL;
- }
- if (!tfo->tpg_check_prod_mode_write_protect) {
- pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
- return -EINVAL;
- }
- if (!tfo->tpg_get_inst_index) {
- pr_err("Missing tfo->tpg_get_inst_index()\n");
- return -EINVAL;
- }
- if (!tfo->release_cmd) {
- pr_err("Missing tfo->release_cmd()\n");
- return -EINVAL;
- }
- if (!tfo->sess_get_index) {
- pr_err("Missing tfo->sess_get_index()\n");
- return -EINVAL;
- }
- if (!tfo->write_pending) {
- pr_err("Missing tfo->write_pending()\n");
- return -EINVAL;
- }
- if (!tfo->set_default_node_attributes) {
- pr_err("Missing tfo->set_default_node_attributes()\n");
- return -EINVAL;
- }
- if (!tfo->get_cmd_state) {
- pr_err("Missing tfo->get_cmd_state()\n");
- return -EINVAL;
- }
- if (!tfo->queue_data_in) {
- pr_err("Missing tfo->queue_data_in()\n");
- return -EINVAL;
- }
- if (!tfo->queue_status) {
- pr_err("Missing tfo->queue_status()\n");
- return -EINVAL;
- }
- if (!tfo->queue_tm_rsp) {
- pr_err("Missing tfo->queue_tm_rsp()\n");
- return -EINVAL;
- }
- if (!tfo->aborted_task) {
- pr_err("Missing tfo->aborted_task()\n");
- return -EINVAL;
- }
- if (!tfo->check_stop_free) {
- pr_err("Missing tfo->check_stop_free()\n");
- return -EINVAL;
- }
- /*
- * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
- * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
- * target_core_fabric_configfs.c WWN+TPG group context code.
- */
- if (!tfo->fabric_make_wwn) {
- pr_err("Missing tfo->fabric_make_wwn()\n");
- return -EINVAL;
- }
- if (!tfo->fabric_drop_wwn) {
- pr_err("Missing tfo->fabric_drop_wwn()\n");
- return -EINVAL;
- }
- if (!tfo->fabric_make_tpg) {
- pr_err("Missing tfo->fabric_make_tpg()\n");
- return -EINVAL;
- }
- if (!tfo->fabric_drop_tpg) {
- pr_err("Missing tfo->fabric_drop_tpg()\n");
- return -EINVAL;
- }
- return 0;
- }
- int target_register_template(const struct target_core_fabric_ops *fo)
- {
- struct target_fabric_configfs *tf;
- int ret;
- ret = target_fabric_tf_ops_check(fo);
- if (ret)
- return ret;
- tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
- if (!tf) {
- pr_err("%s: could not allocate memory!\n", __func__);
- return -ENOMEM;
- }
- INIT_LIST_HEAD(&tf->tf_list);
- atomic_set(&tf->tf_access_cnt, 0);
- tf->tf_ops = fo;
- target_fabric_setup_cits(tf);
- mutex_lock(&g_tf_lock);
- list_add_tail(&tf->tf_list, &g_tf_list);
- mutex_unlock(&g_tf_lock);
- return 0;
- }
- EXPORT_SYMBOL(target_register_template);
- void target_unregister_template(const struct target_core_fabric_ops *fo)
- {
- struct target_fabric_configfs *t;
- mutex_lock(&g_tf_lock);
- list_for_each_entry(t, &g_tf_list, tf_list) {
- if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
- BUG_ON(atomic_read(&t->tf_access_cnt));
- list_del(&t->tf_list);
- mutex_unlock(&g_tf_lock);
- /*
- * Wait for any outstanding fabric se_deve_entry->rcu_head
- * callbacks to complete post kfree_rcu(), before allowing
- * fabric driver unload of TFO->module to proceed.
- */
- rcu_barrier();
- kfree(t);
- return;
- }
- }
- mutex_unlock(&g_tf_lock);
- }
- EXPORT_SYMBOL(target_unregister_template);
- /*##############################################################################
- // Stop functions called by external Target Fabrics Modules
- //############################################################################*/
- static inline struct se_dev_attrib *to_attrib(struct config_item *item)
- {
- return container_of(to_config_group(item), struct se_dev_attrib,
- da_group);
- }
- /* Start functions for struct config_item_type tb_dev_attrib_cit */
- #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
- static ssize_t _name##_show(struct config_item *item, char *page) \
- { \
- return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
- }
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
- DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
- DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
- DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
- DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
- DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
- DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
- DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
- DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
- DEF_CONFIGFS_ATTRIB_SHOW(block_size);
- DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
- DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
- DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
- DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
- DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
- DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
- DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
- DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
- DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
- DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
- #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
- static ssize_t _name##_store(struct config_item *item, const char *page,\
- size_t count) \
- { \
- struct se_dev_attrib *da = to_attrib(item); \
- u32 val; \
- int ret; \
- \
- ret = kstrtou32(page, 0, &val); \
- if (ret < 0) \
- return ret; \
- da->_name = val; \
- return count; \
- }
- DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
- DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
- DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
- DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
- DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
- #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
- static ssize_t _name##_store(struct config_item *item, const char *page, \
- size_t count) \
- { \
- struct se_dev_attrib *da = to_attrib(item); \
- bool flag; \
- int ret; \
- \
- ret = strtobool(page, &flag); \
- if (ret < 0) \
- return ret; \
- da->_name = flag; \
- return count; \
- }
- DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
- DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
- DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
- DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
- DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
- DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
- #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
- static ssize_t _name##_store(struct config_item *item, const char *page,\
- size_t count) \
- { \
- printk_once(KERN_WARNING \
- "ignoring deprecated %s attribute\n", \
- __stringify(_name)); \
- return count; \
- }
- DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
- DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
- static void dev_set_t10_wwn_model_alias(struct se_device *dev)
- {
- const char *configname;
- configname = config_item_name(&dev->dev_group.cg_item);
- if (strlen(configname) >= INQUIRY_MODEL_LEN) {
- pr_warn("dev[%p]: Backstore name '%s' is too long for "
- "INQUIRY_MODEL, truncating to 15 characters\n", dev,
- configname);
- }
- /*
- * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
- * here without potentially breaking existing setups, so continue to
- * truncate one byte shorter than what can be carried in INQUIRY.
- */
- strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
- }
- static ssize_t emulate_model_alias_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- struct se_device *dev = da->da_dev;
- bool flag;
- int ret;
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change model alias"
- " while export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
- if (flag) {
- dev_set_t10_wwn_model_alias(dev);
- } else {
- strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
- sizeof(dev->t10_wwn.model));
- }
- da->emulate_model_alias = flag;
- return count;
- }
- static ssize_t emulate_write_cache_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- if (flag && da->da_dev->transport->get_write_cache) {
- pr_err("emulate_write_cache not supported for this device\n");
- return -EINVAL;
- }
- da->emulate_write_cache = flag;
- pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
- da->da_dev, flag);
- return count;
- }
- static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- u32 val;
- int ret;
- ret = kstrtou32(page, 0, &val);
- if (ret < 0)
- return ret;
- if (val != TARGET_UA_INTLCK_CTRL_CLEAR
- && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
- && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
- pr_err("Illegal value %d\n", val);
- return -EINVAL;
- }
- if (da->da_dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device"
- " UA_INTRLCK_CTRL while export_count is %d\n",
- da->da_dev, da->da_dev->export_count);
- return -EINVAL;
- }
- da->emulate_ua_intlck_ctrl = val;
- pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
- da->da_dev, val);
- return count;
- }
- static ssize_t emulate_tas_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- if (da->da_dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device TAS while"
- " export_count is %d\n",
- da->da_dev, da->da_dev->export_count);
- return -EINVAL;
- }
- da->emulate_tas = flag;
- pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
- da->da_dev, flag ? "Enabled" : "Disabled");
- return count;
- }
- static ssize_t emulate_tpu_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- /*
- * We expect this value to be non-zero when generic Block Layer
- * Discard supported is detected iblock_create_virtdevice().
- */
- if (flag && !da->max_unmap_block_desc_count) {
- pr_err("Generic Block Discard not supported\n");
- return -ENOSYS;
- }
- da->emulate_tpu = flag;
- pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
- da->da_dev, flag);
- return count;
- }
- static ssize_t emulate_tpws_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- /*
- * We expect this value to be non-zero when generic Block Layer
- * Discard supported is detected iblock_create_virtdevice().
- */
- if (flag && !da->max_unmap_block_desc_count) {
- pr_err("Generic Block Discard not supported\n");
- return -ENOSYS;
- }
- da->emulate_tpws = flag;
- pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
- da->da_dev, flag);
- return count;
- }
- static ssize_t pi_prot_type_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- int old_prot = da->pi_prot_type, ret;
- struct se_device *dev = da->da_dev;
- u32 flag;
- ret = kstrtou32(page, 0, &flag);
- if (ret < 0)
- return ret;
- if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
- pr_err("Illegal value %d for pi_prot_type\n", flag);
- return -EINVAL;
- }
- if (flag == 2) {
- pr_err("DIF TYPE2 protection currently not supported\n");
- return -ENOSYS;
- }
- if (da->hw_pi_prot_type) {
- pr_warn("DIF protection enabled on underlying hardware,"
- " ignoring\n");
- return count;
- }
- if (!dev->transport->init_prot || !dev->transport->free_prot) {
- /* 0 is only allowed value for non-supporting backends */
- if (flag == 0)
- return count;
- pr_err("DIF protection not supported by backend: %s\n",
- dev->transport->name);
- return -ENOSYS;
- }
- if (!target_dev_configured(dev)) {
- pr_err("DIF protection requires device to be configured\n");
- return -ENODEV;
- }
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device PROT type while"
- " export_count is %d\n", dev, dev->export_count);
- return -EINVAL;
- }
- da->pi_prot_type = flag;
- if (flag && !old_prot) {
- ret = dev->transport->init_prot(dev);
- if (ret) {
- da->pi_prot_type = old_prot;
- da->pi_prot_verify = (bool) da->pi_prot_type;
- return ret;
- }
- } else if (!flag && old_prot) {
- dev->transport->free_prot(dev);
- }
- da->pi_prot_verify = (bool) da->pi_prot_type;
- pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
- return count;
- }
- /* always zero, but attr needs to remain RW to avoid userspace breakage */
- static ssize_t pi_prot_format_show(struct config_item *item, char *page)
- {
- return snprintf(page, PAGE_SIZE, "0\n");
- }
- static ssize_t pi_prot_format_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- struct se_device *dev = da->da_dev;
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- if (!flag)
- return count;
- if (!dev->transport->format_prot) {
- pr_err("DIF protection format not supported by backend %s\n",
- dev->transport->name);
- return -ENOSYS;
- }
- if (!target_dev_configured(dev)) {
- pr_err("DIF protection format requires device to be configured\n");
- return -ENODEV;
- }
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to format SE Device PROT type while"
- " export_count is %d\n", dev, dev->export_count);
- return -EINVAL;
- }
- ret = dev->transport->format_prot(dev);
- if (ret)
- return ret;
- pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
- return count;
- }
- static ssize_t pi_prot_verify_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- if (!flag) {
- da->pi_prot_verify = flag;
- return count;
- }
- if (da->hw_pi_prot_type) {
- pr_warn("DIF protection enabled on underlying hardware,"
- " ignoring\n");
- return count;
- }
- if (!da->pi_prot_type) {
- pr_warn("DIF protection not supported by backend, ignoring\n");
- return count;
- }
- da->pi_prot_verify = flag;
- return count;
- }
- static ssize_t force_pr_aptpl_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- if (da->da_dev->export_count) {
- pr_err("dev[%p]: Unable to set force_pr_aptpl while"
- " export_count is %d\n",
- da->da_dev, da->da_dev->export_count);
- return -EINVAL;
- }
- da->force_pr_aptpl = flag;
- pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
- return count;
- }
- static ssize_t emulate_rest_reord_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- if (flag != 0) {
- printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
- " reordering not implemented\n", da->da_dev);
- return -ENOSYS;
- }
- da->emulate_rest_reord = flag;
- pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
- da->da_dev, flag);
- return count;
- }
- static ssize_t unmap_zeroes_data_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- bool flag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- if (da->da_dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device"
- " unmap_zeroes_data while export_count is %d\n",
- da->da_dev, da->da_dev->export_count);
- return -EINVAL;
- }
- /*
- * We expect this value to be non-zero when generic Block Layer
- * Discard supported is detected iblock_configure_device().
- */
- if (flag && !da->max_unmap_block_desc_count) {
- pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
- " because max_unmap_block_desc_count is zero\n",
- da->da_dev);
- return -ENOSYS;
- }
- da->unmap_zeroes_data = flag;
- pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
- da->da_dev, flag);
- return count;
- }
- /*
- * Note, this can only be called on unexported SE Device Object.
- */
- static ssize_t queue_depth_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- struct se_device *dev = da->da_dev;
- u32 val;
- int ret;
- ret = kstrtou32(page, 0, &val);
- if (ret < 0)
- return ret;
- if (dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device TCQ while"
- " export_count is %d\n",
- dev, dev->export_count);
- return -EINVAL;
- }
- if (!val) {
- pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
- return -EINVAL;
- }
- if (val > dev->dev_attrib.queue_depth) {
- if (val > dev->dev_attrib.hw_queue_depth) {
- pr_err("dev[%p]: Passed queue_depth:"
- " %u exceeds TCM/SE_Device MAX"
- " TCQ: %u\n", dev, val,
- dev->dev_attrib.hw_queue_depth);
- return -EINVAL;
- }
- }
- da->queue_depth = dev->queue_depth = val;
- pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
- return count;
- }
- static ssize_t optimal_sectors_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- u32 val;
- int ret;
- ret = kstrtou32(page, 0, &val);
- if (ret < 0)
- return ret;
- if (da->da_dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device"
- " optimal_sectors while export_count is %d\n",
- da->da_dev, da->da_dev->export_count);
- return -EINVAL;
- }
- if (val > da->hw_max_sectors) {
- pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
- " greater than hw_max_sectors: %u\n",
- da->da_dev, val, da->hw_max_sectors);
- return -EINVAL;
- }
- da->optimal_sectors = val;
- pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
- da->da_dev, val);
- return count;
- }
- static ssize_t block_size_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- u32 val;
- int ret;
- ret = kstrtou32(page, 0, &val);
- if (ret < 0)
- return ret;
- if (da->da_dev->export_count) {
- pr_err("dev[%p]: Unable to change SE Device block_size"
- " while export_count is %d\n",
- da->da_dev, da->da_dev->export_count);
- return -EINVAL;
- }
- if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
- pr_err("dev[%p]: Illegal value for block_device: %u"
- " for SE device, must be 512, 1024, 2048 or 4096\n",
- da->da_dev, val);
- return -EINVAL;
- }
- da->block_size = val;
- if (da->max_bytes_per_io)
- da->hw_max_sectors = da->max_bytes_per_io / val;
- pr_debug("dev[%p]: SE Device block_size changed to %u\n",
- da->da_dev, val);
- return count;
- }
- static ssize_t alua_support_show(struct config_item *item, char *page)
- {
- struct se_dev_attrib *da = to_attrib(item);
- u8 flags = da->da_dev->transport_flags;
- return snprintf(page, PAGE_SIZE, "%d\n",
- flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
- }
- static ssize_t alua_support_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- struct se_device *dev = da->da_dev;
- bool flag, oldflag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
- if (flag == oldflag)
- return count;
- if (!(dev->transport->transport_flags_changeable &
- TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
- pr_err("dev[%p]: Unable to change SE Device alua_support:"
- " alua_support has fixed value\n", dev);
- return -ENOSYS;
- }
- if (flag)
- dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
- else
- dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
- return count;
- }
- static ssize_t pgr_support_show(struct config_item *item, char *page)
- {
- struct se_dev_attrib *da = to_attrib(item);
- u8 flags = da->da_dev->transport_flags;
- return snprintf(page, PAGE_SIZE, "%d\n",
- flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
- }
- static ssize_t pgr_support_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_dev_attrib *da = to_attrib(item);
- struct se_device *dev = da->da_dev;
- bool flag, oldflag;
- int ret;
- ret = strtobool(page, &flag);
- if (ret < 0)
- return ret;
- oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
- if (flag == oldflag)
- return count;
- if (!(dev->transport->transport_flags_changeable &
- TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
- pr_err("dev[%p]: Unable to change SE Device pgr_support:"
- " pgr_support has fixed value\n", dev);
- return -ENOSYS;
- }
- if (flag)
- dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
- else
- dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
- return count;
- }
- CONFIGFS_ATTR(, emulate_model_alias);
- CONFIGFS_ATTR(, emulate_dpo);
- CONFIGFS_ATTR(, emulate_fua_write);
- CONFIGFS_ATTR(, emulate_fua_read);
- CONFIGFS_ATTR(, emulate_write_cache);
- CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
- CONFIGFS_ATTR(, emulate_tas);
- CONFIGFS_ATTR(, emulate_tpu);
- CONFIGFS_ATTR(, emulate_tpws);
- CONFIGFS_ATTR(, emulate_caw);
- CONFIGFS_ATTR(, emulate_3pc);
- CONFIGFS_ATTR(, emulate_pr);
- CONFIGFS_ATTR(, pi_prot_type);
- CONFIGFS_ATTR_RO(, hw_pi_prot_type);
- CONFIGFS_ATTR(, pi_prot_format);
- CONFIGFS_ATTR(, pi_prot_verify);
- CONFIGFS_ATTR(, enforce_pr_isids);
- CONFIGFS_ATTR(, is_nonrot);
- CONFIGFS_ATTR(, emulate_rest_reord);
- CONFIGFS_ATTR(, force_pr_aptpl);
- CONFIGFS_ATTR_RO(, hw_block_size);
- CONFIGFS_ATTR(, block_size);
- CONFIGFS_ATTR_RO(, hw_max_sectors);
- CONFIGFS_ATTR(, optimal_sectors);
- CONFIGFS_ATTR_RO(, hw_queue_depth);
- CONFIGFS_ATTR(, queue_depth);
- CONFIGFS_ATTR(, max_unmap_lba_count);
- CONFIGFS_ATTR(, max_unmap_block_desc_count);
- CONFIGFS_ATTR(, unmap_granularity);
- CONFIGFS_ATTR(, unmap_granularity_alignment);
- CONFIGFS_ATTR(, unmap_zeroes_data);
- CONFIGFS_ATTR(, max_write_same_len);
- CONFIGFS_ATTR(, alua_support);
- CONFIGFS_ATTR(, pgr_support);
- /*
- * dev_attrib attributes for devices using the target core SBC/SPC
- * interpreter. Any backend using spc_parse_cdb should be using
- * these.
- */
- struct configfs_attribute *sbc_attrib_attrs[] = {
- &attr_emulate_model_alias,
- &attr_emulate_dpo,
- &attr_emulate_fua_write,
- &attr_emulate_fua_read,
- &attr_emulate_write_cache,
- &attr_emulate_ua_intlck_ctrl,
- &attr_emulate_tas,
- &attr_emulate_tpu,
- &attr_emulate_tpws,
- &attr_emulate_caw,
- &attr_emulate_3pc,
- &attr_emulate_pr,
- &attr_pi_prot_type,
- &attr_hw_pi_prot_type,
- &attr_pi_prot_format,
- &attr_pi_prot_verify,
- &attr_enforce_pr_isids,
- &attr_is_nonrot,
- &attr_emulate_rest_reord,
- &attr_force_pr_aptpl,
- &attr_hw_block_size,
- &attr_block_size,
- &attr_hw_max_sectors,
- &attr_optimal_sectors,
- &attr_hw_queue_depth,
- &attr_queue_depth,
- &attr_max_unmap_lba_count,
- &attr_max_unmap_block_desc_count,
- &attr_unmap_granularity,
- &attr_unmap_granularity_alignment,
- &attr_unmap_zeroes_data,
- &attr_max_write_same_len,
- &attr_alua_support,
- &attr_pgr_support,
- NULL,
- };
- EXPORT_SYMBOL(sbc_attrib_attrs);
- /*
- * Minimal dev_attrib attributes for devices passing through CDBs.
- * In this case we only provide a few read-only attributes for
- * backwards compatibility.
- */
- struct configfs_attribute *passthrough_attrib_attrs[] = {
- &attr_hw_pi_prot_type,
- &attr_hw_block_size,
- &attr_hw_max_sectors,
- &attr_hw_queue_depth,
- &attr_emulate_pr,
- &attr_alua_support,
- &attr_pgr_support,
- NULL,
- };
- EXPORT_SYMBOL(passthrough_attrib_attrs);
- /*
- * pr related dev_attrib attributes for devices passing through CDBs,
- * but allowing in core pr emulation.
- */
- struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
- &attr_enforce_pr_isids,
- &attr_force_pr_aptpl,
- NULL,
- };
- EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
- TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
- TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
- /* End functions for struct config_item_type tb_dev_attrib_cit */
- /* Start functions for struct config_item_type tb_dev_wwn_cit */
- static struct t10_wwn *to_t10_wwn(struct config_item *item)
- {
- return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
- }
- static ssize_t target_check_inquiry_data(char *buf)
- {
- size_t len;
- int i;
- len = strlen(buf);
- /*
- * SPC 4.3.1:
- * ASCII data fields shall contain only ASCII printable characters
- * (i.e., code values 20h to 7Eh) and may be terminated with one or
- * more ASCII null (00h) characters.
- */
- for (i = 0; i < len; i++) {
- if (buf[i] < 0x20 || buf[i] > 0x7E) {
- pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
- return -EINVAL;
- }
- }
- return len;
- }
- /*
- * STANDARD and VPD page 0x83 T10 Vendor Identification
- */
- static ssize_t target_wwn_vendor_id_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
- }
- static ssize_t target_wwn_vendor_id_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct t10_wwn *t10_wwn = to_t10_wwn(item);
- struct se_device *dev = t10_wwn->t10_dev;
- /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
- unsigned char buf[INQUIRY_VENDOR_LEN + 2];
- char *stripped = NULL;
- size_t len;
- ssize_t ret;
- len = strlcpy(buf, page, sizeof(buf));
- if (len < sizeof(buf)) {
- /* Strip any newline added from userspace. */
- stripped = strstrip(buf);
- len = strlen(stripped);
- }
- if (len > INQUIRY_VENDOR_LEN) {
- pr_err("Emulated T10 Vendor Identification exceeds"
- " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
- "\n");
- return -EOVERFLOW;
- }
- ret = target_check_inquiry_data(stripped);
- if (ret < 0)
- return ret;
- /*
- * Check to see if any active exports exist. If they do exist, fail
- * here as changing this information on the fly (underneath the
- * initiator side OS dependent multipath code) could cause negative
- * effects.
- */
- if (dev->export_count) {
- pr_err("Unable to set T10 Vendor Identification while"
- " active %d exports exist\n", dev->export_count);
- return -EINVAL;
- }
- BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
- strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
- pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
- " %s\n", dev->t10_wwn.vendor);
- return count;
- }
- static ssize_t target_wwn_product_id_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
- }
- static ssize_t target_wwn_product_id_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct t10_wwn *t10_wwn = to_t10_wwn(item);
- struct se_device *dev = t10_wwn->t10_dev;
- /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
- unsigned char buf[INQUIRY_MODEL_LEN + 2];
- char *stripped = NULL;
- size_t len;
- ssize_t ret;
- len = strlcpy(buf, page, sizeof(buf));
- if (len < sizeof(buf)) {
- /* Strip any newline added from userspace. */
- stripped = strstrip(buf);
- len = strlen(stripped);
- }
- if (len > INQUIRY_MODEL_LEN) {
- pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
- __stringify(INQUIRY_MODEL_LEN)
- "\n");
- return -EOVERFLOW;
- }
- ret = target_check_inquiry_data(stripped);
- if (ret < 0)
- return ret;
- /*
- * Check to see if any active exports exist. If they do exist, fail
- * here as changing this information on the fly (underneath the
- * initiator side OS dependent multipath code) could cause negative
- * effects.
- */
- if (dev->export_count) {
- pr_err("Unable to set T10 Model while active %d exports exist\n",
- dev->export_count);
- return -EINVAL;
- }
- BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
- strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
- pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
- dev->t10_wwn.model);
- return count;
- }
- static ssize_t target_wwn_revision_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
- }
- static ssize_t target_wwn_revision_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct t10_wwn *t10_wwn = to_t10_wwn(item);
- struct se_device *dev = t10_wwn->t10_dev;
- /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
- unsigned char buf[INQUIRY_REVISION_LEN + 2];
- char *stripped = NULL;
- size_t len;
- ssize_t ret;
- len = strlcpy(buf, page, sizeof(buf));
- if (len < sizeof(buf)) {
- /* Strip any newline added from userspace. */
- stripped = strstrip(buf);
- len = strlen(stripped);
- }
- if (len > INQUIRY_REVISION_LEN) {
- pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
- __stringify(INQUIRY_REVISION_LEN)
- "\n");
- return -EOVERFLOW;
- }
- ret = target_check_inquiry_data(stripped);
- if (ret < 0)
- return ret;
- /*
- * Check to see if any active exports exist. If they do exist, fail
- * here as changing this information on the fly (underneath the
- * initiator side OS dependent multipath code) could cause negative
- * effects.
- */
- if (dev->export_count) {
- pr_err("Unable to set T10 Revision while active %d exports exist\n",
- dev->export_count);
- return -EINVAL;
- }
- BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
- strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
- pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
- dev->t10_wwn.revision);
- return count;
- }
- /*
- * VPD page 0x80 Unit serial
- */
- static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
- &to_t10_wwn(item)->unit_serial[0]);
- }
- static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct t10_wwn *t10_wwn = to_t10_wwn(item);
- struct se_device *dev = t10_wwn->t10_dev;
- unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
- /*
- * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
- * from the struct scsi_device level firmware, do not allow
- * VPD Unit Serial to be emulated.
- *
- * Note this struct scsi_device could also be emulating VPD
- * information from its drivers/scsi LLD. But for now we assume
- * it is doing 'the right thing' wrt a world wide unique
- * VPD Unit Serial Number that OS dependent multipath can depend on.
- */
- if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
- pr_err("Underlying SCSI device firmware provided VPD"
- " Unit Serial, ignoring request\n");
- return -EOPNOTSUPP;
- }
- if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
- pr_err("Emulated VPD Unit Serial exceeds"
- " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
- return -EOVERFLOW;
- }
- /*
- * Check to see if any active $FABRIC_MOD exports exist. If they
- * do exist, fail here as changing this information on the fly
- * (underneath the initiator side OS dependent multipath code)
- * could cause negative effects.
- */
- if (dev->export_count) {
- pr_err("Unable to set VPD Unit Serial while"
- " active %d $FABRIC_MOD exports exist\n",
- dev->export_count);
- return -EINVAL;
- }
- /*
- * This currently assumes ASCII encoding for emulated VPD Unit Serial.
- *
- * Also, strip any newline added from the userspace
- * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
- */
- memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
- snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
- snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
- "%s", strstrip(buf));
- dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
- pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
- " %s\n", dev->t10_wwn.unit_serial);
- return count;
- }
- /*
- * VPD page 0x83 Protocol Identifier
- */
- static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
- char *page)
- {
- struct t10_wwn *t10_wwn = to_t10_wwn(item);
- struct t10_vpd *vpd;
- unsigned char buf[VPD_TMP_BUF_SIZE];
- ssize_t len = 0;
- memset(buf, 0, VPD_TMP_BUF_SIZE);
- spin_lock(&t10_wwn->t10_vpd_lock);
- list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
- if (!vpd->protocol_identifier_set)
- continue;
- transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
- if (len + strlen(buf) >= PAGE_SIZE)
- break;
- len += sprintf(page+len, "%s", buf);
- }
- spin_unlock(&t10_wwn->t10_vpd_lock);
- return len;
- }
- /*
- * Generic wrapper for dumping VPD identifiers by association.
- */
- #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
- static ssize_t target_wwn_##_name##_show(struct config_item *item, \
- char *page) \
- { \
- struct t10_wwn *t10_wwn = to_t10_wwn(item); \
- struct t10_vpd *vpd; \
- unsigned char buf[VPD_TMP_BUF_SIZE]; \
- ssize_t len = 0; \
- \
- spin_lock(&t10_wwn->t10_vpd_lock); \
- list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
- if (vpd->association != _assoc) \
- continue; \
- \
- memset(buf, 0, VPD_TMP_BUF_SIZE); \
- transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
- if (len + strlen(buf) >= PAGE_SIZE) \
- break; \
- len += sprintf(page+len, "%s", buf); \
- \
- memset(buf, 0, VPD_TMP_BUF_SIZE); \
- transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
- if (len + strlen(buf) >= PAGE_SIZE) \
- break; \
- len += sprintf(page+len, "%s", buf); \
- \
- memset(buf, 0, VPD_TMP_BUF_SIZE); \
- transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
- if (len + strlen(buf) >= PAGE_SIZE) \
- break; \
- len += sprintf(page+len, "%s", buf); \
- } \
- spin_unlock(&t10_wwn->t10_vpd_lock); \
- \
- return len; \
- }
- /* VPD page 0x83 Association: Logical Unit */
- DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
- /* VPD page 0x83 Association: Target Port */
- DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
- /* VPD page 0x83 Association: SCSI Target Device */
- DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
- CONFIGFS_ATTR(target_wwn_, vendor_id);
- CONFIGFS_ATTR(target_wwn_, product_id);
- CONFIGFS_ATTR(target_wwn_, revision);
- CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
- CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
- CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
- CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
- CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
- static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
- &target_wwn_attr_vendor_id,
- &target_wwn_attr_product_id,
- &target_wwn_attr_revision,
- &target_wwn_attr_vpd_unit_serial,
- &target_wwn_attr_vpd_protocol_identifier,
- &target_wwn_attr_vpd_assoc_logical_unit,
- &target_wwn_attr_vpd_assoc_target_port,
- &target_wwn_attr_vpd_assoc_scsi_target_device,
- NULL,
- };
- TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
- /* End functions for struct config_item_type tb_dev_wwn_cit */
- /* Start functions for struct config_item_type tb_dev_pr_cit */
- static struct se_device *pr_to_dev(struct config_item *item)
- {
- return container_of(to_config_group(item), struct se_device,
- dev_pr_group);
- }
- static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
- char *page)
- {
- struct se_node_acl *se_nacl;
- struct t10_pr_registration *pr_reg;
- char i_buf[PR_REG_ISID_ID_LEN];
- memset(i_buf, 0, PR_REG_ISID_ID_LEN);
- pr_reg = dev->dev_pr_res_holder;
- if (!pr_reg)
- return sprintf(page, "No SPC-3 Reservation holder\n");
- se_nacl = pr_reg->pr_reg_nacl;
- core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
- return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
- se_nacl->se_tpg->se_tpg_tfo->fabric_name,
- se_nacl->initiatorname, i_buf);
- }
- static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
- char *page)
- {
- struct se_session *sess = dev->reservation_holder;
- struct se_node_acl *se_nacl;
- ssize_t len;
- if (sess) {
- se_nacl = sess->se_node_acl;
- len = sprintf(page,
- "SPC-2 Reservation: %s Initiator: %s\n",
- se_nacl->se_tpg->se_tpg_tfo->fabric_name,
- se_nacl->initiatorname);
- } else {
- len = sprintf(page, "No SPC-2 Reservation holder\n");
- }
- return len;
- }
- static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- int ret;
- if (!dev->dev_attrib.emulate_pr)
- return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
- if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
- return sprintf(page, "Passthrough\n");
- spin_lock(&dev->dev_reservation_lock);
- if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
- ret = target_core_dev_pr_show_spc2_res(dev, page);
- else
- ret = target_core_dev_pr_show_spc3_res(dev, page);
- spin_unlock(&dev->dev_reservation_lock);
- return ret;
- }
- static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
- char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- ssize_t len = 0;
- spin_lock(&dev->dev_reservation_lock);
- if (!dev->dev_pr_res_holder) {
- len = sprintf(page, "No SPC-3 Reservation holder\n");
- } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
- len = sprintf(page, "SPC-3 Reservation: All Target"
- " Ports registration\n");
- } else {
- len = sprintf(page, "SPC-3 Reservation: Single"
- " Target Port registration\n");
- }
- spin_unlock(&dev->dev_reservation_lock);
- return len;
- }
- static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
- }
- static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
- char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- struct se_node_acl *se_nacl;
- struct se_portal_group *se_tpg;
- struct t10_pr_registration *pr_reg;
- const struct target_core_fabric_ops *tfo;
- ssize_t len = 0;
- spin_lock(&dev->dev_reservation_lock);
- pr_reg = dev->dev_pr_res_holder;
- if (!pr_reg) {
- len = sprintf(page, "No SPC-3 Reservation holder\n");
- goto out_unlock;
- }
- se_nacl = pr_reg->pr_reg_nacl;
- se_tpg = se_nacl->se_tpg;
- tfo = se_tpg->se_tpg_tfo;
- len += sprintf(page+len, "SPC-3 Reservation: %s"
- " Target Node Endpoint: %s\n", tfo->fabric_name,
- tfo->tpg_get_wwn(se_tpg));
- len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
- " Identifier Tag: %hu %s Portal Group Tag: %hu"
- " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
- tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
- tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
- out_unlock:
- spin_unlock(&dev->dev_reservation_lock);
- return len;
- }
- static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
- char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- const struct target_core_fabric_ops *tfo;
- struct t10_pr_registration *pr_reg;
- unsigned char buf[384];
- char i_buf[PR_REG_ISID_ID_LEN];
- ssize_t len = 0;
- int reg_count = 0;
- len += sprintf(page+len, "SPC-3 PR Registrations:\n");
- spin_lock(&dev->t10_pr.registration_lock);
- list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
- pr_reg_list) {
- memset(buf, 0, 384);
- memset(i_buf, 0, PR_REG_ISID_ID_LEN);
- tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
- core_pr_dump_initiator_port(pr_reg, i_buf,
- PR_REG_ISID_ID_LEN);
- sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
- tfo->fabric_name,
- pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
- pr_reg->pr_res_generation);
- if (len + strlen(buf) >= PAGE_SIZE)
- break;
- len += sprintf(page+len, "%s", buf);
- reg_count++;
- }
- spin_unlock(&dev->t10_pr.registration_lock);
- if (!reg_count)
- len += sprintf(page+len, "None\n");
- return len;
- }
- static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- struct t10_pr_registration *pr_reg;
- ssize_t len = 0;
- spin_lock(&dev->dev_reservation_lock);
- pr_reg = dev->dev_pr_res_holder;
- if (pr_reg) {
- len = sprintf(page, "SPC-3 Reservation Type: %s\n",
- core_scsi3_pr_dump_type(pr_reg->pr_res_type));
- } else {
- len = sprintf(page, "No SPC-3 Reservation holder\n");
- }
- spin_unlock(&dev->dev_reservation_lock);
- return len;
- }
- static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- if (!dev->dev_attrib.emulate_pr)
- return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
- if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
- return sprintf(page, "SPC_PASSTHROUGH\n");
- if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
- return sprintf(page, "SPC2_RESERVATIONS\n");
- return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
- }
- static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
- char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- if (!dev->dev_attrib.emulate_pr ||
- (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
- return 0;
- return sprintf(page, "APTPL Bit Status: %s\n",
- (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
- }
- static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
- char *page)
- {
- struct se_device *dev = pr_to_dev(item);
- if (!dev->dev_attrib.emulate_pr ||
- (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
- 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=%u"},
- {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=%u"},
- {Opt_err, NULL}
- };
- static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_device *dev = pr_to_dev(item);
- unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
- unsigned char *t_fabric = NULL, *t_port = NULL;
- char *orig, *ptr, *opts;
- substring_t args[MAX_OPT_ARGS];
- unsigned long long tmp_ll;
- u64 sa_res_key = 0;
- u64 mapped_lun = 0, target_lun = 0;
- int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
- u16 tpgt = 0;
- u8 type = 0;
- if (!dev->dev_attrib.emulate_pr ||
- (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
- return count;
- if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
- return count;
- if (dev->export_count) {
- pr_debug("Unable to process APTPL metadata while"
- " active fabric exports exist\n");
- return -EINVAL;
- }
- opts = kstrdup(page, GFP_KERNEL);
- if (!opts)
- return -ENOMEM;
- orig = opts;
- while ((ptr = strsep(&opts, ",\n")) != NULL) {
- if (!*ptr)
- continue;
- token = match_token(ptr, tokens, args);
- switch (token) {
- case Opt_initiator_fabric:
- i_fabric = match_strdup(args);
- if (!i_fabric) {
- ret = -ENOMEM;
- goto out;
- }
- break;
- case Opt_initiator_node:
- i_port = match_strdup(args);
- if (!i_port) {
- ret = -ENOMEM;
- goto out;
- }
- if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
- pr_err("APTPL metadata initiator_node="
- " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
- PR_APTPL_MAX_IPORT_LEN);
- ret = -EINVAL;
- break;
- }
- break;
- case Opt_initiator_sid:
- isid = match_strdup(args);
- if (!isid) {
- ret = -ENOMEM;
- goto out;
- }
- if (strlen(isid) >= PR_REG_ISID_LEN) {
- pr_err("APTPL metadata initiator_isid"
- "= exceeds PR_REG_ISID_LEN: %d\n",
- PR_REG_ISID_LEN);
- ret = -EINVAL;
- break;
- }
- break;
- case Opt_sa_res_key:
- ret = match_u64(args, &tmp_ll);
- if (ret < 0) {
- pr_err("kstrtoull() failed for sa_res_key=\n");
- goto out;
- }
- sa_res_key = (u64)tmp_ll;
- break;
- /*
- * PR APTPL Metadata for Reservation
- */
- case Opt_res_holder:
- ret = match_int(args, &arg);
- if (ret)
- goto out;
- res_holder = arg;
- break;
- case Opt_res_type:
- ret = match_int(args, &arg);
- if (ret)
- goto out;
- type = (u8)arg;
- break;
- case Opt_res_scope:
- ret = match_int(args, &arg);
- if (ret)
- goto out;
- break;
- case Opt_res_all_tg_pt:
- ret = match_int(args, &arg);
- if (ret)
- goto out;
- all_tg_pt = (int)arg;
- break;
- case Opt_mapped_lun:
- ret = match_u64(args, &tmp_ll);
- if (ret)
- goto out;
- mapped_lun = (u64)tmp_ll;
- break;
- /*
- * PR APTPL Metadata for Target Port
- */
- case Opt_target_fabric:
- t_fabric = match_strdup(args);
- if (!t_fabric) {
- ret = -ENOMEM;
- goto out;
- }
- break;
- case Opt_target_node:
- t_port = match_strdup(args);
- if (!t_port) {
- ret = -ENOMEM;
- goto out;
- }
- if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
- pr_err("APTPL metadata target_node="
- " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
- PR_APTPL_MAX_TPORT_LEN);
- ret = -EINVAL;
- break;
- }
- break;
- case Opt_tpgt:
- ret = match_int(args, &arg);
- if (ret)
- goto out;
- tpgt = (u16)arg;
- break;
- case Opt_port_rtpi:
- ret = match_int(args, &arg);
- if (ret)
- goto out;
- break;
- case Opt_target_lun:
- ret = match_u64(args, &tmp_ll);
- if (ret)
- goto out;
- target_lun = (u64)tmp_ll;
- break;
- default:
- break;
- }
- }
- if (!i_port || !t_port || !sa_res_key) {
- pr_err("Illegal parameters for APTPL registration\n");
- ret = -EINVAL;
- goto out;
- }
- if (res_holder && !(type)) {
- pr_err("Illegal PR type: 0x%02x for reservation"
- " holder\n", type);
- ret = -EINVAL;
- goto out;
- }
- ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
- i_port, isid, mapped_lun, t_port, tpgt, target_lun,
- res_holder, all_tg_pt, type);
- out:
- kfree(i_fabric);
- kfree(i_port);
- kfree(isid);
- kfree(t_fabric);
- kfree(t_port);
- kfree(orig);
- return (ret == 0) ? count : ret;
- }
- CONFIGFS_ATTR_RO(target_pr_, res_holder);
- CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
- CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
- CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
- CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
- CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
- CONFIGFS_ATTR_RO(target_pr_, res_type);
- CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
- CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
- static struct configfs_attribute *target_core_dev_pr_attrs[] = {
- &target_pr_attr_res_holder,
- &target_pr_attr_res_pr_all_tgt_pts,
- &target_pr_attr_res_pr_generation,
- &target_pr_attr_res_pr_holder_tg_port,
- &target_pr_attr_res_pr_registered_i_pts,
- &target_pr_attr_res_pr_type,
- &target_pr_attr_res_type,
- &target_pr_attr_res_aptpl_active,
- &target_pr_attr_res_aptpl_metadata,
- NULL,
- };
- TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
- /* End functions for struct config_item_type tb_dev_pr_cit */
- /* Start functions for struct config_item_type tb_dev_cit */
- static inline struct se_device *to_device(struct config_item *item)
- {
- return container_of(to_config_group(item), struct se_device, dev_group);
- }
- static ssize_t target_dev_info_show(struct config_item *item, char *page)
- {
- struct se_device *dev = to_device(item);
- int bl = 0;
- ssize_t read_bytes = 0;
- transport_dump_dev_state(dev, page, &bl);
- read_bytes += bl;
- read_bytes += dev->transport->show_configfs_dev_params(dev,
- page+read_bytes);
- return read_bytes;
- }
- static ssize_t target_dev_control_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_device *dev = to_device(item);
- return dev->transport->set_configfs_dev_params(dev, page, count);
- }
- static ssize_t target_dev_alias_show(struct config_item *item, char *page)
- {
- struct se_device *dev = to_device(item);
- if (!(dev->dev_flags & DF_USING_ALIAS))
- return 0;
- return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
- }
- static ssize_t target_dev_alias_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_device *dev = to_device(item);
- struct se_hba *hba = dev->se_hba;
- ssize_t read_bytes;
- if (count > (SE_DEV_ALIAS_LEN-1)) {
- pr_err("alias count: %d exceeds"
- " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
- SE_DEV_ALIAS_LEN-1);
- return -EINVAL;
- }
- read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
- if (!read_bytes)
- return -EINVAL;
- if (dev->dev_alias[read_bytes - 1] == '\n')
- dev->dev_alias[read_bytes - 1] = '\0';
- dev->dev_flags |= DF_USING_ALIAS;
- pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
- config_item_name(&hba->hba_group.cg_item),
- config_item_name(&dev->dev_group.cg_item),
- dev->dev_alias);
- return read_bytes;
- }
- static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
- {
- struct se_device *dev = to_device(item);
- if (!(dev->dev_flags & DF_USING_UDEV_PATH))
- return 0;
- return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
- }
- static ssize_t target_dev_udev_path_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_device *dev = to_device(item);
- struct se_hba *hba = dev->se_hba;
- ssize_t read_bytes;
- if (count > (SE_UDEV_PATH_LEN-1)) {
- pr_err("udev_path count: %d exceeds"
- " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
- SE_UDEV_PATH_LEN-1);
- return -EINVAL;
- }
- read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
- "%s", page);
- if (!read_bytes)
- return -EINVAL;
- if (dev->udev_path[read_bytes - 1] == '\n')
- dev->udev_path[read_bytes - 1] = '\0';
- dev->dev_flags |= DF_USING_UDEV_PATH;
- pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
- config_item_name(&hba->hba_group.cg_item),
- config_item_name(&dev->dev_group.cg_item),
- dev->udev_path);
- return read_bytes;
- }
- static ssize_t target_dev_enable_show(struct config_item *item, char *page)
- {
- struct se_device *dev = to_device(item);
- return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
- }
- static ssize_t target_dev_enable_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_device *dev = to_device(item);
- char *ptr;
- int ret;
- ptr = strstr(page, "1");
- if (!ptr) {
- pr_err("For dev_enable ops, only valid value"
- " is \"1\"\n");
- return -EINVAL;
- }
- ret = target_configure_device(dev);
- if (ret)
- return ret;
- return count;
- }
- static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
- {
- struct se_device *dev = to_device(item);
- struct config_item *lu_ci;
- struct t10_alua_lu_gp *lu_gp;
- struct t10_alua_lu_gp_member *lu_gp_mem;
- ssize_t len = 0;
- lu_gp_mem = dev->dev_alua_lu_gp_mem;
- if (!lu_gp_mem)
- return 0;
- spin_lock(&lu_gp_mem->lu_gp_mem_lock);
- lu_gp = lu_gp_mem->lu_gp;
- if (lu_gp) {
- lu_ci = &lu_gp->lu_gp_group.cg_item;
- len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
- config_item_name(lu_ci), lu_gp->lu_gp_id);
- }
- spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
- return len;
- }
- static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_device *dev = to_device(item);
- struct se_hba *hba = dev->se_hba;
- struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
- struct t10_alua_lu_gp_member *lu_gp_mem;
- unsigned char buf[LU_GROUP_NAME_BUF];
- int move = 0;
- lu_gp_mem = dev->dev_alua_lu_gp_mem;
- if (!lu_gp_mem)
- return count;
- if (count > LU_GROUP_NAME_BUF) {
- pr_err("ALUA LU Group Alias too large!\n");
- return -EINVAL;
- }
- memset(buf, 0, LU_GROUP_NAME_BUF);
- memcpy(buf, page, count);
- /*
- * Any ALUA logical unit alias besides "NULL" means we will be
- * making a new group association.
- */
- if (strcmp(strstrip(buf), "NULL")) {
- /*
- * core_alua_get_lu_gp_by_name() will increment reference to
- * struct t10_alua_lu_gp. This reference is released with
- * core_alua_get_lu_gp_by_name below().
- */
- lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
- if (!lu_gp_new)
- return -ENODEV;
- }
- spin_lock(&lu_gp_mem->lu_gp_mem_lock);
- lu_gp = lu_gp_mem->lu_gp;
- if (lu_gp) {
- /*
- * Clearing an existing lu_gp association, and replacing
- * with NULL
- */
- if (!lu_gp_new) {
- pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
- " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
- " %hu\n",
- config_item_name(&hba->hba_group.cg_item),
- config_item_name(&dev->dev_group.cg_item),
- config_item_name(&lu_gp->lu_gp_group.cg_item),
- lu_gp->lu_gp_id);
- __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
- spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
- return count;
- }
- /*
- * Removing existing association of lu_gp_mem with lu_gp
- */
- __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
- move = 1;
- }
- /*
- * Associate lu_gp_mem with lu_gp_new.
- */
- __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
- spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
- pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
- " core/alua/lu_gps/%s, ID: %hu\n",
- (move) ? "Moving" : "Adding",
- config_item_name(&hba->hba_group.cg_item),
- config_item_name(&dev->dev_group.cg_item),
- config_item_name(&lu_gp_new->lu_gp_group.cg_item),
- lu_gp_new->lu_gp_id);
- core_alua_put_lu_gp_from_name(lu_gp_new);
- return count;
- }
- static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
- {
- struct se_device *dev = to_device(item);
- struct t10_alua_lba_map *map;
- struct t10_alua_lba_map_member *mem;
- char *b = page;
- int bl = 0;
- char state;
- spin_lock(&dev->t10_alua.lba_map_lock);
- if (!list_empty(&dev->t10_alua.lba_map_list))
- bl += sprintf(b + bl, "%u %u\n",
- dev->t10_alua.lba_map_segment_size,
- dev->t10_alua.lba_map_segment_multiplier);
- list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
- bl += sprintf(b + bl, "%llu %llu",
- map->lba_map_first_lba, map->lba_map_last_lba);
- list_for_each_entry(mem, &map->lba_map_mem_list,
- lba_map_mem_list) {
- switch (mem->lba_map_mem_alua_state) {
- case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
- state = 'O';
- break;
- case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
- state = 'A';
- break;
- case ALUA_ACCESS_STATE_STANDBY:
- state = 'S';
- break;
- case ALUA_ACCESS_STATE_UNAVAILABLE:
- state = 'U';
- break;
- default:
- state = '.';
- break;
- }
- bl += sprintf(b + bl, " %d:%c",
- mem->lba_map_mem_alua_pg_id, state);
- }
- bl += sprintf(b + bl, "\n");
- }
- spin_unlock(&dev->t10_alua.lba_map_lock);
- return bl;
- }
- static ssize_t target_dev_lba_map_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_device *dev = to_device(item);
- struct t10_alua_lba_map *lba_map = NULL;
- struct list_head lba_list;
- char *map_entries, *orig, *ptr;
- char state;
- int pg_num = -1, pg;
- int ret = 0, num = 0, pg_id, alua_state;
- unsigned long start_lba = -1, end_lba = -1;
- unsigned long segment_size = -1, segment_mult = -1;
- orig = map_entries = kstrdup(page, GFP_KERNEL);
- if (!map_entries)
- return -ENOMEM;
- INIT_LIST_HEAD(&lba_list);
- while ((ptr = strsep(&map_entries, "\n")) != NULL) {
- if (!*ptr)
- continue;
- if (num == 0) {
- if (sscanf(ptr, "%lu %lu\n",
- &segment_size, &segment_mult) != 2) {
- pr_err("Invalid line %d\n", num);
- ret = -EINVAL;
- break;
- }
- num++;
- continue;
- }
- if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
- pr_err("Invalid line %d\n", num);
- ret = -EINVAL;
- break;
- }
- ptr = strchr(ptr, ' ');
- if (!ptr) {
- pr_err("Invalid line %d, missing end lba\n", num);
- ret = -EINVAL;
- break;
- }
- ptr++;
- ptr = strchr(ptr, ' ');
- if (!ptr) {
- pr_err("Invalid line %d, missing state definitions\n",
- num);
- ret = -EINVAL;
- break;
- }
- ptr++;
- lba_map = core_alua_allocate_lba_map(&lba_list,
- start_lba, end_lba);
- if (IS_ERR(lba_map)) {
- ret = PTR_ERR(lba_map);
- break;
- }
- pg = 0;
- while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
- switch (state) {
- case 'O':
- alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
- break;
- case 'A':
- alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
- break;
- case 'S':
- alua_state = ALUA_ACCESS_STATE_STANDBY;
- break;
- case 'U':
- alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
- break;
- default:
- pr_err("Invalid ALUA state '%c'\n", state);
- ret = -EINVAL;
- goto out;
- }
- ret = core_alua_allocate_lba_map_mem(lba_map,
- pg_id, alua_state);
- if (ret) {
- pr_err("Invalid target descriptor %d:%c "
- "at line %d\n",
- pg_id, state, num);
- break;
- }
- pg++;
- ptr = strchr(ptr, ' ');
- if (ptr)
- ptr++;
- else
- break;
- }
- if (pg_num == -1)
- pg_num = pg;
- else if (pg != pg_num) {
- pr_err("Only %d from %d port groups definitions "
- "at line %d\n", pg, pg_num, num);
- ret = -EINVAL;
- break;
- }
- num++;
- }
- out:
- if (ret) {
- core_alua_free_lba_map(&lba_list);
- count = ret;
- } else
- core_alua_set_lba_map(dev, &lba_list,
- segment_size, segment_mult);
- kfree(orig);
- return count;
- }
- CONFIGFS_ATTR_RO(target_dev_, info);
- CONFIGFS_ATTR_WO(target_dev_, control);
- CONFIGFS_ATTR(target_dev_, alias);
- CONFIGFS_ATTR(target_dev_, udev_path);
- CONFIGFS_ATTR(target_dev_, enable);
- CONFIGFS_ATTR(target_dev_, alua_lu_gp);
- CONFIGFS_ATTR(target_dev_, lba_map);
- static struct configfs_attribute *target_core_dev_attrs[] = {
- &target_dev_attr_info,
- &target_dev_attr_control,
- &target_dev_attr_alias,
- &target_dev_attr_udev_path,
- &target_dev_attr_enable,
- &target_dev_attr_alua_lu_gp,
- &target_dev_attr_lba_map,
- NULL,
- };
- static void target_core_dev_release(struct config_item *item)
- {
- struct config_group *dev_cg = to_config_group(item);
- struct se_device *dev =
- container_of(dev_cg, struct se_device, dev_group);
- target_free_device(dev);
- }
- /*
- * Used in target_core_fabric_configfs.c to verify valid se_device symlink
- * within target_fabric_port_link()
- */
- struct configfs_item_operations target_core_dev_item_ops = {
- .release = target_core_dev_release,
- };
- TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
- /* End functions for struct config_item_type tb_dev_cit */
- /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
- static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
- {
- return container_of(to_config_group(item), struct t10_alua_lu_gp,
- lu_gp_group);
- }
- static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
- {
- struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
- if (!lu_gp->lu_gp_valid_id)
- return 0;
- return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
- }
- static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
- struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
- unsigned long lu_gp_id;
- int ret;
- ret = kstrtoul(page, 0, &lu_gp_id);
- if (ret < 0) {
- pr_err("kstrtoul() returned %d for"
- " lu_gp_id\n", ret);
- return ret;
- }
- if (lu_gp_id > 0x0000ffff) {
- pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
- " 0x0000ffff\n", lu_gp_id);
- return -EINVAL;
- }
- ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
- if (ret < 0)
- return -EINVAL;
- pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
- " Group: core/alua/lu_gps/%s to ID: %hu\n",
- config_item_name(&alua_lu_gp_cg->cg_item),
- lu_gp->lu_gp_id);
- return count;
- }
- static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
- {
- struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
- struct se_device *dev;
- struct se_hba *hba;
- struct t10_alua_lu_gp_member *lu_gp_mem;
- ssize_t len = 0, cur_len;
- unsigned char buf[LU_GROUP_NAME_BUF];
- memset(buf, 0, LU_GROUP_NAME_BUF);
- spin_lock(&lu_gp->lu_gp_lock);
- list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
- dev = lu_gp_mem->lu_gp_mem_dev;
- hba = dev->se_hba;
- cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
- config_item_name(&hba->hba_group.cg_item),
- config_item_name(&dev->dev_group.cg_item));
- cur_len++; /* Extra byte for NULL terminator */
- if ((cur_len + len) > PAGE_SIZE) {
- pr_warn("Ran out of lu_gp_show_attr"
- "_members buffer\n");
- break;
- }
- memcpy(page+len, buf, cur_len);
- len += cur_len;
- }
- spin_unlock(&lu_gp->lu_gp_lock);
- return len;
- }
- CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
- CONFIGFS_ATTR_RO(target_lu_gp_, members);
- static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
- &target_lu_gp_attr_lu_gp_id,
- &target_lu_gp_attr_members,
- 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,
- };
- static const struct config_item_type target_core_alua_lu_gp_cit = {
- .ct_item_ops = &target_core_alua_lu_gp_ops,
- .ct_attrs = target_core_alua_lu_gp_attrs,
- .ct_owner = THIS_MODULE,
- };
- /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
- /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
- static struct config_group *target_core_alua_create_lu_gp(
- struct config_group *group,
- const char *name)
- {
- struct t10_alua_lu_gp *lu_gp;
- struct config_group *alua_lu_gp_cg = NULL;
- struct config_item *alua_lu_gp_ci = NULL;
- lu_gp = core_alua_allocate_lu_gp(name, 0);
- if (IS_ERR(lu_gp))
- return NULL;
- alua_lu_gp_cg = &lu_gp->lu_gp_group;
- alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
- config_group_init_type_name(alua_lu_gp_cg, name,
- &target_core_alua_lu_gp_cit);
- pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
- " Group: core/alua/lu_gps/%s\n",
- config_item_name(alua_lu_gp_ci));
- return alua_lu_gp_cg;
- }
- static void target_core_alua_drop_lu_gp(
- struct config_group *group,
- struct config_item *item)
- {
- struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
- struct t10_alua_lu_gp, lu_gp_group);
- pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
- " Group: core/alua/lu_gps/%s, ID: %hu\n",
- config_item_name(item), lu_gp->lu_gp_id);
- /*
- * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
- * -> target_core_alua_lu_gp_release()
- */
- config_item_put(item);
- }
- static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
- .make_group = &target_core_alua_create_lu_gp,
- .drop_item = &target_core_alua_drop_lu_gp,
- };
- static const 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 */
- static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
- {
- return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
- tg_pt_gp_group);
- }
- static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
- char *page)
- {
- return sprintf(page, "%d\n",
- to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
- }
- static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
- struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
- unsigned long tmp;
- int new_state, ret;
- if (!tg_pt_gp->tg_pt_gp_valid_id) {
- pr_err("Unable to do implicit ALUA on non valid"
- " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
- return -EINVAL;
- }
- if (!target_dev_configured(dev)) {
- pr_err("Unable to set alua_access_state while device is"
- " not configured\n");
- return -ENODEV;
- }
- ret = kstrtoul(page, 0, &tmp);
- if (ret < 0) {
- pr_err("Unable to extract new ALUA access state from"
- " %s\n", page);
- return ret;
- }
- new_state = (int)tmp;
- if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
- pr_err("Unable to process implicit configfs ALUA"
- " transition while TPGS_IMPLICIT_ALUA is disabled\n");
- return -EINVAL;
- }
- if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
- new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
- /* LBA DEPENDENT is only allowed with implicit ALUA */
- pr_err("Unable to process implicit configfs ALUA transition"
- " while explicit ALUA management is enabled\n");
- return -EINVAL;
- }
- ret = core_alua_do_port_transition(tg_pt_gp, dev,
- NULL, NULL, new_state, 0);
- return (!ret) ? count : -EINVAL;
- }
- static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
- char *page)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
- return sprintf(page, "%s\n",
- core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
- }
- static ssize_t target_tg_pt_gp_alua_access_status_store(
- struct config_item *item, const char *page, size_t count)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
- unsigned long tmp;
- int new_status, ret;
- if (!tg_pt_gp->tg_pt_gp_valid_id) {
- pr_err("Unable to do set ALUA access status on non"
- " valid tg_pt_gp ID: %hu\n",
- tg_pt_gp->tg_pt_gp_valid_id);
- return -EINVAL;
- }
- ret = kstrtoul(page, 0, &tmp);
- if (ret < 0) {
- pr_err("Unable to extract new ALUA access status"
- " from %s\n", page);
- return ret;
- }
- new_status = (int)tmp;
- if ((new_status != ALUA_STATUS_NONE) &&
- (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
- (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
- pr_err("Illegal ALUA access status: 0x%02x\n",
- new_status);
- return -EINVAL;
- }
- tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
- return count;
- }
- static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
- char *page)
- {
- return core_alua_show_access_type(to_tg_pt_gp(item), page);
- }
- static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
- const char *page, size_t count)
- {
- return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
- }
- #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
- static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
- struct config_item *item, char *p) \
- { \
- struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
- return sprintf(p, "%d\n", \
- !!(t->tg_pt_gp_alua_supported_states & _bit)); \
- } \
- \
- static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
- struct config_item *item, const char *p, size_t c) \
- { \
- struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
- unsigned long tmp; \
- int ret; \
- \
- if (!t->tg_pt_gp_valid_id) { \
- pr_err("Unable to do set " #_name " ALUA state on non" \
- " valid tg_pt_gp ID: %hu\n", \
- t->tg_pt_gp_valid_id); \
- return -EINVAL; \
- } \
- \
- ret = kstrtoul(p, 0, &tmp); \
- if (ret < 0) { \
- pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
- return -EINVAL; \
- } \
- if (tmp > 1) { \
- pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
- return -EINVAL; \
- } \
- if (tmp) \
- t->tg_pt_gp_alua_supported_states |= _bit; \
- else \
- t->tg_pt_gp_alua_supported_states &= ~_bit; \
- \
- return c; \
- }
- ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
- ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
- ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
- ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
- ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
- ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
- ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
- static ssize_t target_tg_pt_gp_alua_write_metadata_show(
- struct config_item *item, char *page)
- {
- return sprintf(page, "%d\n",
- to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
- }
- static ssize_t target_tg_pt_gp_alua_write_metadata_store(
- struct config_item *item, const char *page, size_t count)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
- unsigned long tmp;
- int ret;
- ret = kstrtoul(page, 0, &tmp);
- if (ret < 0) {
- pr_err("Unable to extract alua_write_metadata\n");
- return ret;
- }
- if ((tmp != 0) && (tmp != 1)) {
- pr_err("Illegal value for alua_write_metadata:"
- " %lu\n", tmp);
- return -EINVAL;
- }
- tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
- return count;
- }
- static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
- char *page)
- {
- return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
- }
- static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
- const char *page, size_t count)
- {
- return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
- count);
- }
- static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
- char *page)
- {
- return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
- }
- static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
- const char *page, size_t count)
- {
- return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
- count);
- }
- static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
- struct config_item *item, char *page)
- {
- return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
- }
- static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
- struct config_item *item, const char *page, size_t count)
- {
- return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
- count);
- }
- static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
- char *page)
- {
- return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
- }
- static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
- const char *page, size_t count)
- {
- return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
- }
- static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
- char *page)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
- 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_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
- struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
- unsigned long tg_pt_gp_id;
- int ret;
- ret = kstrtoul(page, 0, &tg_pt_gp_id);
- if (ret < 0) {
- pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
- page);
- return ret;
- }
- if (tg_pt_gp_id > 0x0000ffff) {
- pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
- tg_pt_gp_id);
- return -EINVAL;
- }
- ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
- if (ret < 0)
- return -EINVAL;
- pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
- "core/alua/tg_pt_gps/%s to ID: %hu\n",
- config_item_name(&alua_tg_pt_gp_cg->cg_item),
- tg_pt_gp->tg_pt_gp_id);
- return count;
- }
- static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
- char *page)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
- struct se_lun *lun;
- 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(lun, &tg_pt_gp->tg_pt_gp_lun_list,
- lun_tg_pt_gp_link) {
- struct se_portal_group *tpg = lun->lun_tpg;
- cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
- "/%s\n", tpg->se_tpg_tfo->fabric_name,
- tpg->se_tpg_tfo->tpg_get_wwn(tpg),
- tpg->se_tpg_tfo->tpg_get_tag(tpg),
- config_item_name(&lun->lun_group.cg_item));
- cur_len++; /* Extra byte for NULL terminator */
- if ((cur_len + len) > PAGE_SIZE) {
- pr_warn("Ran out of lu_gp_show_attr"
- "_members buffer\n");
- break;
- }
- memcpy(page+len, buf, cur_len);
- len += cur_len;
- }
- spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
- return len;
- }
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
- CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
- CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
- CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
- CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
- CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
- CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
- CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
- static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
- &target_tg_pt_gp_attr_alua_access_state,
- &target_tg_pt_gp_attr_alua_access_status,
- &target_tg_pt_gp_attr_alua_access_type,
- &target_tg_pt_gp_attr_alua_support_transitioning,
- &target_tg_pt_gp_attr_alua_support_offline,
- &target_tg_pt_gp_attr_alua_support_lba_dependent,
- &target_tg_pt_gp_attr_alua_support_unavailable,
- &target_tg_pt_gp_attr_alua_support_standby,
- &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
- &target_tg_pt_gp_attr_alua_support_active_optimized,
- &target_tg_pt_gp_attr_alua_write_metadata,
- &target_tg_pt_gp_attr_nonop_delay_msecs,
- &target_tg_pt_gp_attr_trans_delay_msecs,
- &target_tg_pt_gp_attr_implicit_trans_secs,
- &target_tg_pt_gp_attr_preferred,
- &target_tg_pt_gp_attr_tg_pt_gp_id,
- &target_tg_pt_gp_attr_members,
- 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,
- };
- static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
- .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
- .ct_attrs = target_core_alua_tg_pt_gp_attrs,
- .ct_owner = THIS_MODULE,
- };
- /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
- /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
- static struct config_group *target_core_alua_create_tg_pt_gp(
- struct config_group *group,
- const char *name)
- {
- struct t10_alua *alua = container_of(group, struct t10_alua,
- alua_tg_pt_gps_group);
- struct t10_alua_tg_pt_gp *tg_pt_gp;
- struct config_group *alua_tg_pt_gp_cg = NULL;
- struct config_item *alua_tg_pt_gp_ci = NULL;
- tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
- if (!tg_pt_gp)
- return NULL;
- alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
- alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
- config_group_init_type_name(alua_tg_pt_gp_cg, name,
- &target_core_alua_tg_pt_gp_cit);
- pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
- " Group: alua/tg_pt_gps/%s\n",
- config_item_name(alua_tg_pt_gp_ci));
- return alua_tg_pt_gp_cg;
- }
- static void target_core_alua_drop_tg_pt_gp(
- struct config_group *group,
- struct config_item *item)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
- struct t10_alua_tg_pt_gp, tg_pt_gp_group);
- pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
- " Group: alua/tg_pt_gps/%s, ID: %hu\n",
- config_item_name(item), tg_pt_gp->tg_pt_gp_id);
- /*
- * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
- * -> target_core_alua_tg_pt_gp_release().
- */
- config_item_put(item);
- }
- static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
- .make_group = &target_core_alua_create_tg_pt_gp,
- .drop_item = &target_core_alua_drop_tg_pt_gp,
- };
- TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
- /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
- /* Start functions for struct config_item_type target_core_alua_cit */
- /*
- * target_core_alua_cit is a ConfigFS group that lives under
- * /sys/kernel/config/target/core/alua. There are default groups
- * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
- * target_core_alua_cit in target_core_init_configfs() below.
- */
- static const struct config_item_type target_core_alua_cit = {
- .ct_item_ops = NULL,
- .ct_attrs = NULL,
- .ct_owner = THIS_MODULE,
- };
- /* End functions for struct config_item_type target_core_alua_cit */
- /* Start functions for struct config_item_type tb_dev_stat_cit */
- static struct config_group *target_core_stat_mkdir(
- struct config_group *group,
- const char *name)
- {
- return ERR_PTR(-ENOSYS);
- }
- static void target_core_stat_rmdir(
- struct config_group *group,
- struct config_item *item)
- {
- return;
- }
- static struct configfs_group_operations target_core_stat_group_ops = {
- .make_group = &target_core_stat_mkdir,
- .drop_item = &target_core_stat_rmdir,
- };
- TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
- /* End functions for struct config_item_type tb_dev_stat_cit */
- /* Start functions for struct config_item_type target_core_hba_cit */
- static struct config_group *target_core_make_subdev(
- struct config_group *group,
- const char *name)
- {
- struct t10_alua_tg_pt_gp *tg_pt_gp;
- struct config_item *hba_ci = &group->cg_item;
- struct se_hba *hba = item_to_hba(hba_ci);
- struct target_backend *tb = hba->backend;
- struct se_device *dev;
- int errno = -ENOMEM, ret;
- ret = mutex_lock_interruptible(&hba->hba_access_mutex);
- if (ret)
- return ERR_PTR(ret);
- dev = target_alloc_device(hba, name);
- if (!dev)
- goto out_unlock;
- config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
- config_group_init_type_name(&dev->dev_action_group, "action",
- &tb->tb_dev_action_cit);
- configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
- config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
- &tb->tb_dev_attrib_cit);
- configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
- config_group_init_type_name(&dev->dev_pr_group, "pr",
- &tb->tb_dev_pr_cit);
- configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
- config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
- &tb->tb_dev_wwn_cit);
- configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
- &dev->dev_group);
- config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
- "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
- configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
- &dev->dev_group);
- config_group_init_type_name(&dev->dev_stat_grps.stat_group,
- "statistics", &tb->tb_dev_stat_cit);
- configfs_add_default_group(&dev->dev_stat_grps.stat_group,
- &dev->dev_group);
- /*
- * Add core/$HBA/$DEV/alua/default_tg_pt_gp
- */
- tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
- if (!tg_pt_gp)
- goto out_free_device;
- dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
- config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
- "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
- configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
- &dev->t10_alua.alua_tg_pt_gps_group);
- /*
- * Add core/$HBA/$DEV/statistics/ default groups
- */
- target_stat_setup_dev_default_groups(dev);
- mutex_unlock(&hba->hba_access_mutex);
- return &dev->dev_group;
- out_free_device:
- target_free_device(dev);
- out_unlock:
- mutex_unlock(&hba->hba_access_mutex);
- return ERR_PTR(errno);
- }
- static void target_core_drop_subdev(
- struct config_group *group,
- struct config_item *item)
- {
- struct config_group *dev_cg = to_config_group(item);
- struct se_device *dev =
- container_of(dev_cg, struct se_device, dev_group);
- struct se_hba *hba;
- hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
- mutex_lock(&hba->hba_access_mutex);
- configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
- configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
- /*
- * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
- * directly from target_core_alua_tg_pt_gp_release().
- */
- dev->t10_alua.default_tg_pt_gp = NULL;
- configfs_remove_default_groups(dev_cg);
- /*
- * se_dev is released from target_core_dev_item_ops->release()
- */
- config_item_put(item);
- mutex_unlock(&hba->hba_access_mutex);
- }
- static struct configfs_group_operations target_core_hba_group_ops = {
- .make_group = target_core_make_subdev,
- .drop_item = target_core_drop_subdev,
- };
- static inline struct se_hba *to_hba(struct config_item *item)
- {
- return container_of(to_config_group(item), struct se_hba, hba_group);
- }
- static ssize_t target_hba_info_show(struct config_item *item, char *page)
- {
- struct se_hba *hba = to_hba(item);
- return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
- hba->hba_id, hba->backend->ops->name,
- TARGET_CORE_VERSION);
- }
- static ssize_t target_hba_mode_show(struct config_item *item, char *page)
- {
- struct se_hba *hba = to_hba(item);
- 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_hba_mode_store(struct config_item *item,
- const char *page, size_t count)
- {
- struct se_hba *hba = to_hba(item);
- unsigned long mode_flag;
- int ret;
- if (hba->backend->ops->pmode_enable_hba == NULL)
- return -EINVAL;
- ret = kstrtoul(page, 0, &mode_flag);
- if (ret < 0) {
- pr_err("Unable to extract hba mode flag: %d\n", ret);
- return ret;
- }
- if (hba->dev_count) {
- pr_err("Unable to set hba_mode with active devices\n");
- return -EINVAL;
- }
- ret = hba->backend->ops->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;
- }
- CONFIGFS_ATTR_RO(target_, hba_info);
- CONFIGFS_ATTR(target_, hba_mode);
- 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_attr_hba_info,
- &target_attr_hba_mode,
- NULL,
- };
- static struct configfs_item_operations target_core_hba_item_ops = {
- .release = target_core_hba_release,
- };
- static const struct config_item_type target_core_hba_cit = {
- .ct_item_ops = &target_core_hba_item_ops,
- .ct_group_ops = &target_core_hba_group_ops,
- .ct_attrs = target_core_hba_attrs,
- .ct_owner = THIS_MODULE,
- };
- static struct config_group *target_core_call_addhbatotarget(
- struct config_group *group,
- const char *name)
- {
- char *se_plugin_str, *str, *str2;
- struct se_hba *hba;
- char buf[TARGET_CORE_NAME_MAX_LEN];
- unsigned long plugin_dep_id = 0;
- int ret;
- memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
- if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
- pr_err("Passed *name strlen(): %d exceeds"
- " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
- TARGET_CORE_NAME_MAX_LEN);
- return ERR_PTR(-ENAMETOOLONG);
- }
- snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
- str = strstr(buf, "_");
- if (!str) {
- pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
- return ERR_PTR(-EINVAL);
- }
- se_plugin_str = buf;
- /*
- * Special case for subsystem plugins that have "_" in their names.
- * Namely rd_direct and rd_mcp..
- */
- str2 = strstr(str+1, "_");
- if (str2) {
- *str2 = '\0'; /* Terminate for *se_plugin_str */
- str2++; /* Skip to start of plugin dependent ID */
- str = str2;
- } else {
- *str = '\0'; /* Terminate for *se_plugin_str */
- str++; /* Skip to start of plugin dependent ID */
- }
- ret = kstrtoul(str, 0, &plugin_dep_id);
- if (ret < 0) {
- pr_err("kstrtoul() returned %d for"
- " plugin_dep_id\n", ret);
- return ERR_PTR(ret);
- }
- /*
- * Load up TCM subsystem plugins if they have not already been loaded.
- */
- transport_subsystem_check_init();
- hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
- if (IS_ERR(hba))
- return ERR_CAST(hba);
- config_group_init_type_name(&hba->hba_group, name,
- &target_core_hba_cit);
- return &hba->hba_group;
- }
- static void target_core_call_delhbafromtarget(
- struct config_group *group,
- struct config_item *item)
- {
- /*
- * core_delete_hba() is called from target_core_hba_item_ops->release()
- * -> target_core_hba_release()
- */
- config_item_put(item);
- }
- static struct configfs_group_operations target_core_group_ops = {
- .make_group = target_core_call_addhbatotarget,
- .drop_item = target_core_call_delhbafromtarget,
- };
- static const struct config_item_type target_core_cit = {
- .ct_item_ops = NULL,
- .ct_group_ops = &target_core_group_ops,
- .ct_attrs = NULL,
- .ct_owner = THIS_MODULE,
- };
- /* Stop functions for struct config_item_type target_core_hba_cit */
- void target_setup_backend_cits(struct target_backend *tb)
- {
- target_core_setup_dev_cit(tb);
- target_core_setup_dev_action_cit(tb);
- target_core_setup_dev_attrib_cit(tb);
- target_core_setup_dev_pr_cit(tb);
- target_core_setup_dev_wwn_cit(tb);
- target_core_setup_dev_alua_tg_pt_gps_cit(tb);
- target_core_setup_dev_stat_cit(tb);
- }
- static void target_init_dbroot(void)
- {
- struct file *fp;
- snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
- fp = filp_open(db_root_stage, O_RDONLY, 0);
- if (IS_ERR(fp)) {
- pr_err("db_root: cannot open: %s\n", db_root_stage);
- return;
- }
- if (!S_ISDIR(file_inode(fp)->i_mode)) {
- filp_close(fp, NULL);
- pr_err("db_root: not a valid directory: %s\n", db_root_stage);
- return;
- }
- filp_close(fp, NULL);
- strncpy(db_root, db_root_stage, DB_ROOT_LEN);
- pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
- }
- static int __init target_core_init_configfs(void)
- {
- struct configfs_subsystem *subsys = &target_core_fabrics;
- struct t10_alua_lu_gp *lu_gp;
- int ret;
- pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
- " Engine: %s on %s/%s on "UTS_RELEASE"\n",
- TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
- config_group_init(&subsys->su_group);
- mutex_init(&subsys->su_mutex);
- ret = init_se_kmem_caches();
- if (ret < 0)
- return ret;
- /*
- * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
- * and ALUA Logical Unit Group and Target Port Group infrastructure.
- */
- config_group_init_type_name(&target_core_hbagroup, "core",
- &target_core_cit);
- configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
- /*
- * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
- */
- config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
- configfs_add_default_group(&alua_group, &target_core_hbagroup);
- /*
- * Add ALUA Logical Unit Group and Target Port Group ConfigFS
- * groups under /sys/kernel/config/target/core/alua/
- */
- config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
- &target_core_alua_lu_gps_cit);
- configfs_add_default_group(&alua_lu_gps_group, &alua_group);
- /*
- * Add core/alua/lu_gps/default_lu_gp
- */
- lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
- if (IS_ERR(lu_gp)) {
- ret = -ENOMEM;
- goto out_global;
- }
- config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
- &target_core_alua_lu_gp_cit);
- configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
- default_lu_gp = lu_gp;
- /*
- * Register the target_core_mod subsystem with configfs.
- */
- ret = configfs_register_subsystem(subsys);
- if (ret < 0) {
- pr_err("Error %d while registering subsystem %s\n",
- ret, subsys->su_group.cg_item.ci_namebuf);
- goto out_global;
- }
- pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
- " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
- " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
- /*
- * Register built-in RAMDISK subsystem logic for virtual LUN 0
- */
- ret = rd_module_init();
- if (ret < 0)
- goto out;
- ret = core_dev_setup_virtual_lun0();
- if (ret < 0)
- goto out;
- ret = target_xcopy_setup_pt();
- if (ret < 0)
- goto out;
- target_init_dbroot();
- return 0;
- out:
- configfs_unregister_subsystem(subsys);
- core_dev_release_virtual_lun0();
- rd_module_exit();
- out_global:
- if (default_lu_gp) {
- core_alua_free_lu_gp(default_lu_gp);
- default_lu_gp = NULL;
- }
- release_se_kmem_caches();
- return ret;
- }
- static void __exit target_core_exit_configfs(void)
- {
- configfs_remove_default_groups(&alua_lu_gps_group);
- configfs_remove_default_groups(&alua_group);
- configfs_remove_default_groups(&target_core_hbagroup);
- /*
- * We expect subsys->su_group.default_groups to be released
- * by configfs subsystem provider logic..
- */
- configfs_unregister_subsystem(&target_core_fabrics);
- core_alua_free_lu_gp(default_lu_gp);
- default_lu_gp = NULL;
- pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
- " Infrastructure\n");
- core_dev_release_virtual_lun0();
- rd_module_exit();
- target_xcopy_release_pt();
- release_se_kmem_caches();
- }
- MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
- MODULE_AUTHOR("nab@Linux-iSCSI.org");
- MODULE_LICENSE("GPL");
- MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver);
- module_init(target_core_init_configfs);
- module_exit(target_core_exit_configfs);
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