diff options
Diffstat (limited to 'drivers/target/target_core_configfs.c')
| -rw-r--r-- | drivers/target/target_core_configfs.c | 3365 |
1 files changed, 3365 insertions, 0 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c new file mode 100644 index 000000000..f6b1549f4 --- /dev/null +++ b/drivers/target/target_core_configfs.c @@ -0,0 +1,3365 @@ +/******************************************************************************* + * Filename: target_core_configfs.c + * + * This file contains ConfigFS logic for the Generic Target Engine project. + * + * (c) Copyright 2008-2013 Datera, Inc. + * + * Nicholas A. Bellinger <nab@kernel.org> + * + * based on configfs Copyright (C) 2005 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + ****************************************************************************/ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <generated/utsrelease.h> +#include <linux/utsname.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/namei.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/delay.h> +#include <linux/unistd.h> +#include <linux/string.h> +#include <linux/parser.h> +#include <linux/syscalls.h> +#include <linux/configfs.h> +#include <linux/spinlock.h> + +#include <target/target_core_base.h> +#include <target/target_core_backend.h> +#include <target/target_core_fabric.h> + +#include "target_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) { + if (!strcmp(tf->tf_ops->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->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->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->name) { + pr_err("Missing tfo->name\n"); + return -EINVAL; + } + if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) { + pr_err("Passed name: %s exceeds TARGET_FABRIC" + "_NAME_SIZE\n", tfo->name); + return -EINVAL; + } + if (!tfo->get_fabric_name) { + pr_err("Missing tfo->get_fabric_name()\n"); + return -EINVAL; + } + if (!tfo->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->write_pending_status) { + pr_err("Missing tfo->write_pending_status()\n"); + return -EINVAL; + } + if (!tfo->set_default_node_attributes) { + pr_err("Missing tfo->set_default_node_attributes()\n"); + return -EINVAL; + } + if (!tfo->get_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->name, fo->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(pi_prot_type); +DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); +DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format); +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(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) >= 16) { + pr_warn("dev[%p]: Backstore name '%s' is too long for " + "INQUIRY_MODEL, truncating to 16 bytes\n", dev, + configname); + } + snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); +} + +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; + + if (flag) { + dev_set_t10_wwn_model_alias(dev); + } else { + strncpy(&dev->t10_wwn.model[0], + dev->transport->inquiry_prod, 16); + } + 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 != 0 && val != 1 && val != 2) { + 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; +} + +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->transport_flags; + + return snprintf(page, PAGE_SIZE, "%d\n", + flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); +} + +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->transport_flags; + + return snprintf(page, PAGE_SIZE, "%d\n", + flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); +} + +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(, 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_RO(, alua_support); +CONFIGFS_ATTR_RO(, 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_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_alua_support, + &attr_pgr_support, + NULL, +}; +EXPORT_SYMBOL(passthrough_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); +} + +/* + * 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_, 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_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->get_fabric_name(), + se_nacl->initiatorname, i_buf); +} + +static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, + char *page) +{ + struct se_node_acl *se_nacl; + ssize_t len; + + se_nacl = dev->dev_reserved_node_acl; + if (se_nacl) { + len = sprintf(page, + "SPC-2 Reservation: %s Initiator: %s\n", + se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), + se_nacl->initiatorname); + } else { + len = sprintf(page, "No SPC-2 Reservation holder\n"); + } + return len; +} + +static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) +{ + struct se_device *dev = pr_to_dev(item); + int ret; + + if (dev->transport->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->get_fabric_name(), + tfo->tpg_get_wwn(se_tpg)); + len += sprintf(page+len, "SPC-3 Reservation: Relative Port" + " Identifier Tag: %hu %s Portal Group Tag: %hu" + " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, + tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), + tfo->get_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->get_fabric_name(), + pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, + pr_reg->pr_res_generation); + + if (len + strlen(buf) >= PAGE_SIZE) + break; + + len += sprintf(page+len, "%s", buf); + reg_count++; + } + spin_unlock(&dev->t10_pr.registration_lock); + + if (!reg_count) + len += sprintf(page+len, "None\n"); + + return len; +} + +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->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) + return sprintf(page, "SPC_PASSTHROUGH\n"); + else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) + return sprintf(page, "SPC2_RESERVATIONS\n"); + else + return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); +} + +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->transport->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->transport->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->transport->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->get_fabric_name(), + tpg->se_tpg_tfo->tpg_get_wwn(tpg), + tpg->se_tpg_tfo->tpg_get_tag(tpg), + config_item_name(&lun->lun_group.cg_item)); + cur_len++; /* Extra byte for NULL terminator */ + + if ((cur_len + len) > PAGE_SIZE) { + pr_warn("Ran out of lu_gp_show_attr" + "_members buffer\n"); + break; + } + memcpy(page+len, buf, cur_len); + len += cur_len; + } + spin_unlock(&tg_pt_gp->tg_pt_gp_lock); + + return len; +} + +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_init(target_core_init_configfs); +module_exit(target_core_exit_configfs); |