| // SPDX-License-Identifier: GPL-2.0-or-later |
| /******************************************************************************* |
| * Filename: target_core_configfs.c |
| * |
| * This file contains ConfigFS logic for the Generic Target Engine project. |
| * |
| * (c) Copyright 2008-2013 Datera, Inc. |
| * |
| * Nicholas A. Bellinger <nab@kernel.org> |
| * |
| * based on configfs Copyright (C) 2005 Oracle. All rights reserved. |
| * |
| ****************************************************************************/ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <generated/utsrelease.h> |
| #include <linux/utsname.h> |
| #include <linux/init.h> |
| #include <linux/fs.h> |
| #include <linux/namei.h> |
| #include <linux/slab.h> |
| #include <linux/types.h> |
| #include <linux/delay.h> |
| #include <linux/unistd.h> |
| #include <linux/string.h> |
| #include <linux/parser.h> |
| #include <linux/syscalls.h> |
| #include <linux/configfs.h> |
| #include <linux/spinlock.h> |
| |
| #include <target/target_core_base.h> |
| #include <target/target_core_backend.h> |
| #include <target/target_core_fabric.h> |
| |
| #include "target_core_internal.h" |
| #include "target_core_alua.h" |
| #include "target_core_pr.h" |
| #include "target_core_rd.h" |
| #include "target_core_xcopy.h" |
| |
| #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \ |
| static void target_core_setup_##_name##_cit(struct target_backend *tb) \ |
| { \ |
| struct config_item_type *cit = &tb->tb_##_name##_cit; \ |
| \ |
| cit->ct_item_ops = _item_ops; \ |
| cit->ct_group_ops = _group_ops; \ |
| cit->ct_attrs = _attrs; \ |
| cit->ct_owner = tb->ops->owner; \ |
| pr_debug("Setup generic %s\n", __stringify(_name)); \ |
| } |
| |
| #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \ |
| static void target_core_setup_##_name##_cit(struct target_backend *tb) \ |
| { \ |
| struct config_item_type *cit = &tb->tb_##_name##_cit; \ |
| \ |
| cit->ct_item_ops = _item_ops; \ |
| cit->ct_group_ops = _group_ops; \ |
| cit->ct_attrs = tb->ops->tb_##_name##_attrs; \ |
| cit->ct_owner = tb->ops->owner; \ |
| pr_debug("Setup generic %s\n", __stringify(_name)); \ |
| } |
| |
| extern struct t10_alua_lu_gp *default_lu_gp; |
| |
| static LIST_HEAD(g_tf_list); |
| static DEFINE_MUTEX(g_tf_lock); |
| |
| static struct config_group target_core_hbagroup; |
| static struct config_group alua_group; |
| static struct config_group alua_lu_gps_group; |
| |
| static unsigned int target_devices; |
| static DEFINE_MUTEX(target_devices_lock); |
| |
| 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; |
| ssize_t r = -EINVAL; |
| |
| mutex_lock(&target_devices_lock); |
| if (target_devices) { |
| pr_err("db_root: cannot be changed because it's in use\n"); |
| goto unlock; |
| } |
| |
| if (count > (DB_ROOT_LEN - 1)) { |
| pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n", |
| (int)count, DB_ROOT_LEN - 1); |
| goto unlock; |
| } |
| |
| read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page); |
| if (!read_bytes) |
| goto unlock; |
| |
| 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)) { |
| pr_err("db_root: cannot open: %s\n", db_root_stage); |
| goto unlock; |
| } |
| if (!S_ISDIR(file_inode(fp)->i_mode)) { |
| filp_close(fp, NULL); |
| pr_err("db_root: not a directory: %s\n", db_root_stage); |
| goto unlock; |
| } |
| filp_close(fp, NULL); |
| |
| strncpy(db_root, db_root_stage, read_bytes); |
| pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root); |
| |
| r = read_bytes; |
| |
| unlock: |
| mutex_unlock(&target_devices_lock); |
| return r; |
| } |
| |
| CONFIGFS_ATTR(target_core_item_, dbroot); |
| |
| static struct target_fabric_configfs *target_core_get_fabric( |
| const char *name) |
| { |
| struct target_fabric_configfs *tf; |
| |
| if (!name) |
| return NULL; |
| |
| mutex_lock(&g_tf_lock); |
| list_for_each_entry(tf, &g_tf_list, tf_list) { |
| const char *cmp_name = tf->tf_ops->fabric_alias; |
| if (!cmp_name) |
| cmp_name = tf->tf_ops->fabric_name; |
| if (!strcmp(cmp_name, name)) { |
| atomic_inc(&tf->tf_access_cnt); |
| mutex_unlock(&g_tf_lock); |
| return tf; |
| } |
| } |
| mutex_unlock(&g_tf_lock); |
| |
| return NULL; |
| } |
| |
| /* |
| * Called from struct target_core_group_ops->make_group() |
| */ |
| static struct config_group *target_core_register_fabric( |
| struct config_group *group, |
| const char *name) |
| { |
| struct target_fabric_configfs *tf; |
| int ret; |
| |
| pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" |
| " %s\n", group, name); |
| |
| tf = target_core_get_fabric(name); |
| if (!tf) { |
| pr_debug("target_core_register_fabric() trying autoload for %s\n", |
| name); |
| |
| /* |
| * Below are some hardcoded request_module() calls to automatically |
| * local fabric modules when the following is called: |
| * |
| * mkdir -p /sys/kernel/config/target/$MODULE_NAME |
| * |
| * Note that this does not limit which TCM fabric module can be |
| * registered, but simply provids auto loading logic for modules with |
| * mkdir(2) system calls with known TCM fabric modules. |
| */ |
| |
| if (!strncmp(name, "iscsi", 5)) { |
| /* |
| * Automatically load the LIO Target fabric module when the |
| * following is called: |
| * |
| * mkdir -p $CONFIGFS/target/iscsi |
| */ |
| ret = request_module("iscsi_target_mod"); |
| if (ret < 0) { |
| pr_debug("request_module() failed for" |
| " iscsi_target_mod.ko: %d\n", ret); |
| return ERR_PTR(-EINVAL); |
| } |
| } else if (!strncmp(name, "loopback", 8)) { |
| /* |
| * Automatically load the tcm_loop fabric module when the |
| * following is called: |
| * |
| * mkdir -p $CONFIGFS/target/loopback |
| */ |
| ret = request_module("tcm_loop"); |
| if (ret < 0) { |
| pr_debug("request_module() failed for" |
| " tcm_loop.ko: %d\n", ret); |
| return ERR_PTR(-EINVAL); |
| } |
| } |
| |
| tf = target_core_get_fabric(name); |
| } |
| |
| if (!tf) { |
| pr_debug("target_core_get_fabric() failed for %s\n", |
| name); |
| return ERR_PTR(-EINVAL); |
| } |
| pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:" |
| " %s\n", tf->tf_ops->fabric_name); |
| /* |
| * On a successful target_core_get_fabric() look, the returned |
| * struct target_fabric_configfs *tf will contain a usage reference. |
| */ |
| pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n", |
| &tf->tf_wwn_cit); |
| |
| config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit); |
| |
| config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", |
| &tf->tf_discovery_cit); |
| configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group); |
| |
| pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n", |
| config_item_name(&tf->tf_group.cg_item)); |
| return &tf->tf_group; |
| } |
| |
| /* |
| * Called from struct target_core_group_ops->drop_item() |
| */ |
| static void target_core_deregister_fabric( |
| struct config_group *group, |
| struct config_item *item) |
| { |
| struct target_fabric_configfs *tf = container_of( |
| to_config_group(item), struct target_fabric_configfs, tf_group); |
| |
| pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in" |
| " tf list\n", config_item_name(item)); |
| |
| pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:" |
| " %s\n", tf->tf_ops->fabric_name); |
| atomic_dec(&tf->tf_access_cnt); |
| |
| pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" |
| " %s\n", config_item_name(item)); |
| |
| configfs_remove_default_groups(&tf->tf_group); |
| config_item_put(item); |
| } |
| |
| static struct configfs_group_operations target_core_fabric_group_ops = { |
| .make_group = &target_core_register_fabric, |
| .drop_item = &target_core_deregister_fabric, |
| }; |
| |
| /* |
| * All item attributes appearing in /sys/kernel/target/ appear here. |
| */ |
| static struct configfs_attribute *target_core_fabric_item_attrs[] = { |
| &target_core_item_attr_version, |
| &target_core_item_attr_dbroot, |
| NULL, |
| }; |
| |
| /* |
| * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ |
| */ |
| static const struct config_item_type target_core_fabrics_item = { |
| .ct_group_ops = &target_core_fabric_group_ops, |
| .ct_attrs = target_core_fabric_item_attrs, |
| .ct_owner = THIS_MODULE, |
| }; |
| |
| static struct configfs_subsystem target_core_fabrics = { |
| .su_group = { |
| .cg_item = { |
| .ci_namebuf = "target", |
| .ci_type = &target_core_fabrics_item, |
| }, |
| }, |
| }; |
| |
| int target_depend_item(struct config_item *item) |
| { |
| return configfs_depend_item(&target_core_fabrics, item); |
| } |
| EXPORT_SYMBOL(target_depend_item); |
| |
| void target_undepend_item(struct config_item *item) |
| { |
| return configfs_undepend_item(item); |
| } |
| EXPORT_SYMBOL(target_undepend_item); |
| |
| /*############################################################################## |
| // Start functions called by external Target Fabrics Modules |
| //############################################################################*/ |
| |
| static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo) |
| { |
| if (tfo->fabric_alias) { |
| if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) { |
| pr_err("Passed alias: %s exceeds " |
| "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias); |
| return -EINVAL; |
| } |
| } |
| if (!tfo->fabric_name) { |
| pr_err("Missing tfo->fabric_name\n"); |
| return -EINVAL; |
| } |
| if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) { |
| pr_err("Passed name: %s exceeds " |
| "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name); |
| return -EINVAL; |
| } |
| if (!tfo->tpg_get_wwn) { |
| pr_err("Missing tfo->tpg_get_wwn()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->tpg_get_tag) { |
| pr_err("Missing tfo->tpg_get_tag()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->tpg_check_demo_mode) { |
| pr_err("Missing tfo->tpg_check_demo_mode()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->tpg_check_demo_mode_cache) { |
| pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->tpg_check_demo_mode_write_protect) { |
| pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->tpg_check_prod_mode_write_protect) { |
| pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->tpg_get_inst_index) { |
| pr_err("Missing tfo->tpg_get_inst_index()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->release_cmd) { |
| pr_err("Missing tfo->release_cmd()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->sess_get_index) { |
| pr_err("Missing tfo->sess_get_index()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->write_pending) { |
| pr_err("Missing tfo->write_pending()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->set_default_node_attributes) { |
| pr_err("Missing tfo->set_default_node_attributes()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->get_cmd_state) { |
| pr_err("Missing tfo->get_cmd_state()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->queue_data_in) { |
| pr_err("Missing tfo->queue_data_in()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->queue_status) { |
| pr_err("Missing tfo->queue_status()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->queue_tm_rsp) { |
| pr_err("Missing tfo->queue_tm_rsp()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->aborted_task) { |
| pr_err("Missing tfo->aborted_task()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->check_stop_free) { |
| pr_err("Missing tfo->check_stop_free()\n"); |
| return -EINVAL; |
| } |
| /* |
| * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn() |
| * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in |
| * target_core_fabric_configfs.c WWN+TPG group context code. |
| */ |
| if (!tfo->fabric_make_wwn) { |
| pr_err("Missing tfo->fabric_make_wwn()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->fabric_drop_wwn) { |
| pr_err("Missing tfo->fabric_drop_wwn()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->fabric_make_tpg) { |
| pr_err("Missing tfo->fabric_make_tpg()\n"); |
| return -EINVAL; |
| } |
| if (!tfo->fabric_drop_tpg) { |
| pr_err("Missing tfo->fabric_drop_tpg()\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| int target_register_template(const struct target_core_fabric_ops *fo) |
| { |
| struct target_fabric_configfs *tf; |
| int ret; |
| |
| ret = target_fabric_tf_ops_check(fo); |
| if (ret) |
| return ret; |
| |
| tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); |
| if (!tf) { |
| pr_err("%s: could not allocate memory!\n", __func__); |
| return -ENOMEM; |
| } |
| |
| INIT_LIST_HEAD(&tf->tf_list); |
| atomic_set(&tf->tf_access_cnt, 0); |
| tf->tf_ops = fo; |
| target_fabric_setup_cits(tf); |
| |
| mutex_lock(&g_tf_lock); |
| list_add_tail(&tf->tf_list, &g_tf_list); |
| mutex_unlock(&g_tf_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(target_register_template); |
| |
| void target_unregister_template(const struct target_core_fabric_ops *fo) |
| { |
| struct target_fabric_configfs *t; |
| |
| mutex_lock(&g_tf_lock); |
| list_for_each_entry(t, &g_tf_list, tf_list) { |
| if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) { |
| BUG_ON(atomic_read(&t->tf_access_cnt)); |
| list_del(&t->tf_list); |
| mutex_unlock(&g_tf_lock); |
| /* |
| * Wait for any outstanding fabric se_deve_entry->rcu_head |
| * callbacks to complete post kfree_rcu(), before allowing |
| * fabric driver unload of TFO->module to proceed. |
| */ |
| rcu_barrier(); |
| kfree(t->tf_tpg_base_cit.ct_attrs); |
| kfree(t); |
| return; |
| } |
| } |
| mutex_unlock(&g_tf_lock); |
| } |
| EXPORT_SYMBOL(target_unregister_template); |
| |
| /*############################################################################## |
| // Stop functions called by external Target Fabrics Modules |
| //############################################################################*/ |
| |
| static inline struct se_dev_attrib *to_attrib(struct config_item *item) |
| { |
| return container_of(to_config_group(item), struct se_dev_attrib, |
| da_group); |
| } |
| |
| /* Start functions for struct config_item_type tb_dev_attrib_cit */ |
| #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \ |
| static ssize_t _name##_show(struct config_item *item, char *page) \ |
| { \ |
| return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \ |
| } |
| |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr); |
| DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type); |
| DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type); |
| DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify); |
| DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids); |
| DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot); |
| DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord); |
| DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl); |
| DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size); |
| DEF_CONFIGFS_ATTRIB_SHOW(block_size); |
| DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors); |
| DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors); |
| DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth); |
| DEF_CONFIGFS_ATTRIB_SHOW(queue_depth); |
| DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count); |
| DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count); |
| DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity); |
| DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment); |
| DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data); |
| DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len); |
| |
| #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \ |
| static ssize_t _name##_store(struct config_item *item, const char *page,\ |
| size_t count) \ |
| { \ |
| struct se_dev_attrib *da = to_attrib(item); \ |
| u32 val; \ |
| int ret; \ |
| \ |
| ret = kstrtou32(page, 0, &val); \ |
| if (ret < 0) \ |
| return ret; \ |
| da->_name = val; \ |
| return count; \ |
| } |
| |
| DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count); |
| DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count); |
| DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity); |
| DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment); |
| DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len); |
| |
| #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \ |
| static ssize_t _name##_store(struct config_item *item, const char *page, \ |
| size_t count) \ |
| { \ |
| struct se_dev_attrib *da = to_attrib(item); \ |
| bool flag; \ |
| int ret; \ |
| \ |
| ret = strtobool(page, &flag); \ |
| if (ret < 0) \ |
| return ret; \ |
| da->_name = flag; \ |
| return count; \ |
| } |
| |
| DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write); |
| DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw); |
| DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc); |
| DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr); |
| DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids); |
| DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot); |
| |
| #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \ |
| static ssize_t _name##_store(struct config_item *item, const char *page,\ |
| size_t count) \ |
| { \ |
| printk_once(KERN_WARNING \ |
| "ignoring deprecated %s attribute\n", \ |
| __stringify(_name)); \ |
| return count; \ |
| } |
| |
| DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo); |
| DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read); |
| |
| static void dev_set_t10_wwn_model_alias(struct se_device *dev) |
| { |
| const char *configname; |
| |
| configname = config_item_name(&dev->dev_group.cg_item); |
| if (strlen(configname) >= INQUIRY_MODEL_LEN) { |
| pr_warn("dev[%p]: Backstore name '%s' is too long for " |
| "INQUIRY_MODEL, truncating to 15 characters\n", dev, |
| configname); |
| } |
| /* |
| * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1) |
| * here without potentially breaking existing setups, so continue to |
| * truncate one byte shorter than what can be carried in INQUIRY. |
| */ |
| strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN); |
| } |
| |
| static ssize_t emulate_model_alias_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| struct se_device *dev = da->da_dev; |
| bool flag; |
| int ret; |
| |
| if (dev->export_count) { |
| pr_err("dev[%p]: Unable to change model alias" |
| " while export_count is %d\n", |
| dev, dev->export_count); |
| return -EINVAL; |
| } |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); |
| if (flag) { |
| dev_set_t10_wwn_model_alias(dev); |
| } else { |
| strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod, |
| sizeof(dev->t10_wwn.model)); |
| } |
| da->emulate_model_alias = flag; |
| return count; |
| } |
| |
| static ssize_t emulate_write_cache_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| if (flag && da->da_dev->transport->get_write_cache) { |
| pr_err("emulate_write_cache not supported for this device\n"); |
| return -EINVAL; |
| } |
| |
| da->emulate_write_cache = flag; |
| pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", |
| da->da_dev, flag); |
| return count; |
| } |
| |
| static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| u32 val; |
| int ret; |
| |
| ret = kstrtou32(page, 0, &val); |
| if (ret < 0) |
| return ret; |
| |
| if (val != TARGET_UA_INTLCK_CTRL_CLEAR |
| && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR |
| && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) { |
| pr_err("Illegal value %d\n", val); |
| return -EINVAL; |
| } |
| |
| if (da->da_dev->export_count) { |
| pr_err("dev[%p]: Unable to change SE Device" |
| " UA_INTRLCK_CTRL while export_count is %d\n", |
| da->da_dev, da->da_dev->export_count); |
| return -EINVAL; |
| } |
| da->emulate_ua_intlck_ctrl = val; |
| pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", |
| da->da_dev, val); |
| return count; |
| } |
| |
| static ssize_t emulate_tas_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| if (da->da_dev->export_count) { |
| pr_err("dev[%p]: Unable to change SE Device TAS while" |
| " export_count is %d\n", |
| da->da_dev, da->da_dev->export_count); |
| return -EINVAL; |
| } |
| da->emulate_tas = flag; |
| pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", |
| da->da_dev, flag ? "Enabled" : "Disabled"); |
| |
| return count; |
| } |
| |
| static ssize_t emulate_tpu_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * We expect this value to be non-zero when generic Block Layer |
| * Discard supported is detected iblock_create_virtdevice(). |
| */ |
| if (flag && !da->max_unmap_block_desc_count) { |
| pr_err("Generic Block Discard not supported\n"); |
| return -ENOSYS; |
| } |
| |
| da->emulate_tpu = flag; |
| pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", |
| da->da_dev, flag); |
| return count; |
| } |
| |
| static ssize_t emulate_tpws_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * We expect this value to be non-zero when generic Block Layer |
| * Discard supported is detected iblock_create_virtdevice(). |
| */ |
| if (flag && !da->max_unmap_block_desc_count) { |
| pr_err("Generic Block Discard not supported\n"); |
| return -ENOSYS; |
| } |
| |
| da->emulate_tpws = flag; |
| pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", |
| da->da_dev, flag); |
| return count; |
| } |
| |
| static ssize_t pi_prot_type_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| int old_prot = da->pi_prot_type, ret; |
| struct se_device *dev = da->da_dev; |
| u32 flag; |
| |
| ret = kstrtou32(page, 0, &flag); |
| if (ret < 0) |
| return ret; |
| |
| if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { |
| pr_err("Illegal value %d for pi_prot_type\n", flag); |
| return -EINVAL; |
| } |
| if (flag == 2) { |
| pr_err("DIF TYPE2 protection currently not supported\n"); |
| return -ENOSYS; |
| } |
| if (da->hw_pi_prot_type) { |
| pr_warn("DIF protection enabled on underlying hardware," |
| " ignoring\n"); |
| return count; |
| } |
| if (!dev->transport->init_prot || !dev->transport->free_prot) { |
| /* 0 is only allowed value for non-supporting backends */ |
| if (flag == 0) |
| return count; |
| |
| pr_err("DIF protection not supported by backend: %s\n", |
| dev->transport->name); |
| return -ENOSYS; |
| } |
| if (!target_dev_configured(dev)) { |
| pr_err("DIF protection requires device to be configured\n"); |
| return -ENODEV; |
| } |
| if (dev->export_count) { |
| pr_err("dev[%p]: Unable to change SE Device PROT type while" |
| " export_count is %d\n", dev, dev->export_count); |
| return -EINVAL; |
| } |
| |
| da->pi_prot_type = flag; |
| |
| if (flag && !old_prot) { |
| ret = dev->transport->init_prot(dev); |
| if (ret) { |
| da->pi_prot_type = old_prot; |
| da->pi_prot_verify = (bool) da->pi_prot_type; |
| return ret; |
| } |
| |
| } else if (!flag && old_prot) { |
| dev->transport->free_prot(dev); |
| } |
| |
| da->pi_prot_verify = (bool) da->pi_prot_type; |
| pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); |
| return count; |
| } |
| |
| /* always zero, but attr needs to remain RW to avoid userspace breakage */ |
| static ssize_t pi_prot_format_show(struct config_item *item, char *page) |
| { |
| return snprintf(page, PAGE_SIZE, "0\n"); |
| } |
| |
| static ssize_t pi_prot_format_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| struct se_device *dev = da->da_dev; |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| if (!flag) |
| return count; |
| |
| if (!dev->transport->format_prot) { |
| pr_err("DIF protection format not supported by backend %s\n", |
| dev->transport->name); |
| return -ENOSYS; |
| } |
| if (!target_dev_configured(dev)) { |
| pr_err("DIF protection format requires device to be configured\n"); |
| return -ENODEV; |
| } |
| if (dev->export_count) { |
| pr_err("dev[%p]: Unable to format SE Device PROT type while" |
| " export_count is %d\n", dev, dev->export_count); |
| return -EINVAL; |
| } |
| |
| ret = dev->transport->format_prot(dev); |
| if (ret) |
| return ret; |
| |
| pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); |
| return count; |
| } |
| |
| static ssize_t pi_prot_verify_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| if (!flag) { |
| da->pi_prot_verify = flag; |
| return count; |
| } |
| if (da->hw_pi_prot_type) { |
| pr_warn("DIF protection enabled on underlying hardware," |
| " ignoring\n"); |
| return count; |
| } |
| if (!da->pi_prot_type) { |
| pr_warn("DIF protection not supported by backend, ignoring\n"); |
| return count; |
| } |
| da->pi_prot_verify = flag; |
| |
| return count; |
| } |
| |
| static ssize_t force_pr_aptpl_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| if (da->da_dev->export_count) { |
| pr_err("dev[%p]: Unable to set force_pr_aptpl while" |
| " export_count is %d\n", |
| da->da_dev, da->da_dev->export_count); |
| return -EINVAL; |
| } |
| |
| da->force_pr_aptpl = flag; |
| pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag); |
| return count; |
| } |
| |
| static ssize_t emulate_rest_reord_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| if (flag != 0) { |
| printk(KERN_ERR "dev[%p]: SE Device emulation of restricted" |
| " reordering not implemented\n", da->da_dev); |
| return -ENOSYS; |
| } |
| da->emulate_rest_reord = flag; |
| pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", |
| da->da_dev, flag); |
| return count; |
| } |
| |
| static ssize_t unmap_zeroes_data_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| bool flag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| if (da->da_dev->export_count) { |
| pr_err("dev[%p]: Unable to change SE Device" |
| " unmap_zeroes_data while export_count is %d\n", |
| da->da_dev, da->da_dev->export_count); |
| return -EINVAL; |
| } |
| /* |
| * We expect this value to be non-zero when generic Block Layer |
| * Discard supported is detected iblock_configure_device(). |
| */ |
| if (flag && !da->max_unmap_block_desc_count) { |
| pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set" |
| " because max_unmap_block_desc_count is zero\n", |
| da->da_dev); |
| return -ENOSYS; |
| } |
| da->unmap_zeroes_data = flag; |
| pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n", |
| da->da_dev, flag); |
| return count; |
| } |
| |
| /* |
| * Note, this can only be called on unexported SE Device Object. |
| */ |
| static ssize_t queue_depth_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| struct se_device *dev = da->da_dev; |
| u32 val; |
| int ret; |
| |
| ret = kstrtou32(page, 0, &val); |
| if (ret < 0) |
| return ret; |
| |
| if (dev->export_count) { |
| pr_err("dev[%p]: Unable to change SE Device TCQ while" |
| " export_count is %d\n", |
| dev, dev->export_count); |
| return -EINVAL; |
| } |
| if (!val) { |
| pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev); |
| return -EINVAL; |
| } |
| |
| if (val > dev->dev_attrib.queue_depth) { |
| if (val > dev->dev_attrib.hw_queue_depth) { |
| pr_err("dev[%p]: Passed queue_depth:" |
| " %u exceeds TCM/SE_Device MAX" |
| " TCQ: %u\n", dev, val, |
| dev->dev_attrib.hw_queue_depth); |
| return -EINVAL; |
| } |
| } |
| da->queue_depth = dev->queue_depth = val; |
| pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val); |
| return count; |
| } |
| |
| static ssize_t optimal_sectors_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| u32 val; |
| int ret; |
| |
| ret = kstrtou32(page, 0, &val); |
| if (ret < 0) |
| return ret; |
| |
| if (da->da_dev->export_count) { |
| pr_err("dev[%p]: Unable to change SE Device" |
| " optimal_sectors while export_count is %d\n", |
| da->da_dev, da->da_dev->export_count); |
| return -EINVAL; |
| } |
| if (val > da->hw_max_sectors) { |
| pr_err("dev[%p]: Passed optimal_sectors %u cannot be" |
| " greater than hw_max_sectors: %u\n", |
| da->da_dev, val, da->hw_max_sectors); |
| return -EINVAL; |
| } |
| |
| da->optimal_sectors = val; |
| pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", |
| da->da_dev, val); |
| return count; |
| } |
| |
| static ssize_t block_size_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| u32 val; |
| int ret; |
| |
| ret = kstrtou32(page, 0, &val); |
| if (ret < 0) |
| return ret; |
| |
| if (da->da_dev->export_count) { |
| pr_err("dev[%p]: Unable to change SE Device block_size" |
| " while export_count is %d\n", |
| da->da_dev, da->da_dev->export_count); |
| return -EINVAL; |
| } |
| |
| if (val != 512 && val != 1024 && val != 2048 && val != 4096) { |
| pr_err("dev[%p]: Illegal value for block_device: %u" |
| " for SE device, must be 512, 1024, 2048 or 4096\n", |
| da->da_dev, val); |
| return -EINVAL; |
| } |
| |
| da->block_size = val; |
| if (da->max_bytes_per_io) |
| da->hw_max_sectors = da->max_bytes_per_io / val; |
| |
| pr_debug("dev[%p]: SE Device block_size changed to %u\n", |
| da->da_dev, val); |
| return count; |
| } |
| |
| static ssize_t alua_support_show(struct config_item *item, char *page) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| u8 flags = da->da_dev->transport_flags; |
| |
| return snprintf(page, PAGE_SIZE, "%d\n", |
| flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1); |
| } |
| |
| static ssize_t alua_support_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| struct se_device *dev = da->da_dev; |
| bool flag, oldflag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA); |
| if (flag == oldflag) |
| return count; |
| |
| if (!(dev->transport->transport_flags_changeable & |
| TRANSPORT_FLAG_PASSTHROUGH_ALUA)) { |
| pr_err("dev[%p]: Unable to change SE Device alua_support:" |
| " alua_support has fixed value\n", dev); |
| return -ENOSYS; |
| } |
| |
| if (flag) |
| dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA; |
| else |
| dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA; |
| return count; |
| } |
| |
| static ssize_t pgr_support_show(struct config_item *item, char *page) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| u8 flags = da->da_dev->transport_flags; |
| |
| return snprintf(page, PAGE_SIZE, "%d\n", |
| flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1); |
| } |
| |
| static ssize_t pgr_support_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_dev_attrib *da = to_attrib(item); |
| struct se_device *dev = da->da_dev; |
| bool flag, oldflag; |
| int ret; |
| |
| ret = strtobool(page, &flag); |
| if (ret < 0) |
| return ret; |
| |
| oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR); |
| if (flag == oldflag) |
| return count; |
| |
| if (!(dev->transport->transport_flags_changeable & |
| TRANSPORT_FLAG_PASSTHROUGH_PGR)) { |
| pr_err("dev[%p]: Unable to change SE Device pgr_support:" |
| " pgr_support has fixed value\n", dev); |
| return -ENOSYS; |
| } |
| |
| if (flag) |
| dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR; |
| else |
| dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR; |
| return count; |
| } |
| |
| CONFIGFS_ATTR(, emulate_model_alias); |
| CONFIGFS_ATTR(, emulate_dpo); |
| CONFIGFS_ATTR(, emulate_fua_write); |
| CONFIGFS_ATTR(, emulate_fua_read); |
| CONFIGFS_ATTR(, emulate_write_cache); |
| CONFIGFS_ATTR(, emulate_ua_intlck_ctrl); |
| CONFIGFS_ATTR(, emulate_tas); |
| CONFIGFS_ATTR(, emulate_tpu); |
| CONFIGFS_ATTR(, emulate_tpws); |
| CONFIGFS_ATTR(, emulate_caw); |
| CONFIGFS_ATTR(, emulate_3pc); |
| CONFIGFS_ATTR(, emulate_pr); |
| CONFIGFS_ATTR(, pi_prot_type); |
| CONFIGFS_ATTR_RO(, hw_pi_prot_type); |
| CONFIGFS_ATTR(, pi_prot_format); |
| CONFIGFS_ATTR(, pi_prot_verify); |
| CONFIGFS_ATTR(, enforce_pr_isids); |
| CONFIGFS_ATTR(, is_nonrot); |
| CONFIGFS_ATTR(, emulate_rest_reord); |
| CONFIGFS_ATTR(, force_pr_aptpl); |
| CONFIGFS_ATTR_RO(, hw_block_size); |
| CONFIGFS_ATTR(, block_size); |
| CONFIGFS_ATTR_RO(, hw_max_sectors); |
| CONFIGFS_ATTR(, optimal_sectors); |
| CONFIGFS_ATTR_RO(, hw_queue_depth); |
| CONFIGFS_ATTR(, queue_depth); |
| CONFIGFS_ATTR(, max_unmap_lba_count); |
| CONFIGFS_ATTR(, max_unmap_block_desc_count); |
| CONFIGFS_ATTR(, unmap_granularity); |
| CONFIGFS_ATTR(, unmap_granularity_alignment); |
| CONFIGFS_ATTR(, unmap_zeroes_data); |
| CONFIGFS_ATTR(, max_write_same_len); |
| CONFIGFS_ATTR(, alua_support); |
| CONFIGFS_ATTR(, pgr_support); |
| |
| /* |
| * dev_attrib attributes for devices using the target core SBC/SPC |
| * interpreter. Any backend using spc_parse_cdb should be using |
| * these. |
| */ |
| struct configfs_attribute *sbc_attrib_attrs[] = { |
| &attr_emulate_model_alias, |
| &attr_emulate_dpo, |
| &attr_emulate_fua_write, |
| &attr_emulate_fua_read, |
| &attr_emulate_write_cache, |
| &attr_emulate_ua_intlck_ctrl, |
| &attr_emulate_tas, |
| &attr_emulate_tpu, |
| &attr_emulate_tpws, |
| &attr_emulate_caw, |
| &attr_emulate_3pc, |
| &attr_emulate_pr, |
| &attr_pi_prot_type, |
| &attr_hw_pi_prot_type, |
| &attr_pi_prot_format, |
| &attr_pi_prot_verify, |
| &attr_enforce_pr_isids, |
| &attr_is_nonrot, |
| &attr_emulate_rest_reord, |
| &attr_force_pr_aptpl, |
| &attr_hw_block_size, |
| &attr_block_size, |
| &attr_hw_max_sectors, |
| &attr_optimal_sectors, |
| &attr_hw_queue_depth, |
| &attr_queue_depth, |
| &attr_max_unmap_lba_count, |
| &attr_max_unmap_block_desc_count, |
| &attr_unmap_granularity, |
| &attr_unmap_granularity_alignment, |
| &attr_unmap_zeroes_data, |
| &attr_max_write_same_len, |
| &attr_alua_support, |
| &attr_pgr_support, |
| NULL, |
| }; |
| EXPORT_SYMBOL(sbc_attrib_attrs); |
| |
| /* |
| * Minimal dev_attrib attributes for devices passing through CDBs. |
| * In this case we only provide a few read-only attributes for |
| * backwards compatibility. |
| */ |
| struct configfs_attribute *passthrough_attrib_attrs[] = { |
| &attr_hw_pi_prot_type, |
| &attr_hw_block_size, |
| &attr_hw_max_sectors, |
| &attr_hw_queue_depth, |
| &attr_emulate_pr, |
| &attr_alua_support, |
| &attr_pgr_support, |
| NULL, |
| }; |
| EXPORT_SYMBOL(passthrough_attrib_attrs); |
| |
| /* |
| * pr related dev_attrib attributes for devices passing through CDBs, |
| * but allowing in core pr emulation. |
| */ |
| struct configfs_attribute *passthrough_pr_attrib_attrs[] = { |
| &attr_enforce_pr_isids, |
| &attr_force_pr_aptpl, |
| NULL, |
| }; |
| EXPORT_SYMBOL(passthrough_pr_attrib_attrs); |
| |
| TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL); |
| TB_CIT_SETUP_DRV(dev_action, NULL, NULL); |
| |
| /* End functions for struct config_item_type tb_dev_attrib_cit */ |
| |
| /* Start functions for struct config_item_type tb_dev_wwn_cit */ |
| |
| static struct t10_wwn *to_t10_wwn(struct config_item *item) |
| { |
| return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group); |
| } |
| |
| static ssize_t target_check_inquiry_data(char *buf) |
| { |
| size_t len; |
| int i; |
| |
| len = strlen(buf); |
| |
| /* |
| * SPC 4.3.1: |
| * ASCII data fields shall contain only ASCII printable characters |
| * (i.e., code values 20h to 7Eh) and may be terminated with one or |
| * more ASCII null (00h) characters. |
| */ |
| for (i = 0; i < len; i++) { |
| if (buf[i] < 0x20 || buf[i] > 0x7E) { |
| pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n"); |
| return -EINVAL; |
| } |
| } |
| |
| return len; |
| } |
| |
| /* |
| * STANDARD and VPD page 0x83 T10 Vendor Identification |
| */ |
| static ssize_t target_wwn_vendor_id_show(struct config_item *item, |
| char *page) |
| { |
| return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]); |
| } |
| |
| static ssize_t target_wwn_vendor_id_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct t10_wwn *t10_wwn = to_t10_wwn(item); |
| struct se_device *dev = t10_wwn->t10_dev; |
| /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ |
| unsigned char buf[INQUIRY_VENDOR_LEN + 2]; |
| char *stripped = NULL; |
| size_t len; |
| ssize_t ret; |
| |
| len = strlcpy(buf, page, sizeof(buf)); |
| if (len < sizeof(buf)) { |
| /* Strip any newline added from userspace. */ |
| stripped = strstrip(buf); |
| len = strlen(stripped); |
| } |
| if (len > INQUIRY_VENDOR_LEN) { |
| pr_err("Emulated T10 Vendor Identification exceeds" |
| " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN) |
| "\n"); |
| return -EOVERFLOW; |
| } |
| |
| ret = target_check_inquiry_data(stripped); |
| |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * Check to see if any active exports exist. If they do exist, fail |
| * here as changing this information on the fly (underneath the |
| * initiator side OS dependent multipath code) could cause negative |
| * effects. |
| */ |
| if (dev->export_count) { |
| pr_err("Unable to set T10 Vendor Identification while" |
| " active %d exports exist\n", dev->export_count); |
| return -EINVAL; |
| } |
| |
| BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1); |
| strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor)); |
| |
| pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:" |
| " %s\n", dev->t10_wwn.vendor); |
| |
| return count; |
| } |
| |
| static ssize_t target_wwn_product_id_show(struct config_item *item, |
| char *page) |
| { |
| return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]); |
| } |
| |
| static ssize_t target_wwn_product_id_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct t10_wwn *t10_wwn = to_t10_wwn(item); |
| struct se_device *dev = t10_wwn->t10_dev; |
| /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ |
| unsigned char buf[INQUIRY_MODEL_LEN + 2]; |
| char *stripped = NULL; |
| size_t len; |
| ssize_t ret; |
| |
| len = strlcpy(buf, page, sizeof(buf)); |
| if (len < sizeof(buf)) { |
| /* Strip any newline added from userspace. */ |
| stripped = strstrip(buf); |
| len = strlen(stripped); |
| } |
| if (len > INQUIRY_MODEL_LEN) { |
| pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: " |
| __stringify(INQUIRY_MODEL_LEN) |
| "\n"); |
| return -EOVERFLOW; |
| } |
| |
| ret = target_check_inquiry_data(stripped); |
| |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * Check to see if any active exports exist. If they do exist, fail |
| * here as changing this information on the fly (underneath the |
| * initiator side OS dependent multipath code) could cause negative |
| * effects. |
| */ |
| if (dev->export_count) { |
| pr_err("Unable to set T10 Model while active %d exports exist\n", |
| dev->export_count); |
| return -EINVAL; |
| } |
| |
| BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1); |
| strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model)); |
| |
| pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n", |
| dev->t10_wwn.model); |
| |
| return count; |
| } |
| |
| static ssize_t target_wwn_revision_show(struct config_item *item, |
| char *page) |
| { |
| return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]); |
| } |
| |
| static ssize_t target_wwn_revision_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct t10_wwn *t10_wwn = to_t10_wwn(item); |
| struct se_device *dev = t10_wwn->t10_dev; |
| /* +2 to allow for a trailing (stripped) '\n' and null-terminator */ |
| unsigned char buf[INQUIRY_REVISION_LEN + 2]; |
| char *stripped = NULL; |
| size_t len; |
| ssize_t ret; |
| |
| len = strlcpy(buf, page, sizeof(buf)); |
| if (len < sizeof(buf)) { |
| /* Strip any newline added from userspace. */ |
| stripped = strstrip(buf); |
| len = strlen(stripped); |
| } |
| if (len > INQUIRY_REVISION_LEN) { |
| pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: " |
| __stringify(INQUIRY_REVISION_LEN) |
| "\n"); |
| return -EOVERFLOW; |
| } |
| |
| ret = target_check_inquiry_data(stripped); |
| |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * Check to see if any active exports exist. If they do exist, fail |
| * here as changing this information on the fly (underneath the |
| * initiator side OS dependent multipath code) could cause negative |
| * effects. |
| */ |
| if (dev->export_count) { |
| pr_err("Unable to set T10 Revision while active %d exports exist\n", |
| dev->export_count); |
| return -EINVAL; |
| } |
| |
| BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1); |
| strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision)); |
| |
| pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n", |
| dev->t10_wwn.revision); |
| |
| return count; |
| } |
| |
| static ssize_t |
| target_wwn_company_id_show(struct config_item *item, |
| char *page) |
| { |
| return snprintf(page, PAGE_SIZE, "%#08x\n", |
| to_t10_wwn(item)->company_id); |
| } |
| |
| static ssize_t |
| target_wwn_company_id_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct t10_wwn *t10_wwn = to_t10_wwn(item); |
| struct se_device *dev = t10_wwn->t10_dev; |
| u32 val; |
| int ret; |
| |
| /* |
| * The IEEE COMPANY_ID field should contain a 24-bit canonical |
| * form OUI assigned by the IEEE. |
| */ |
| ret = kstrtou32(page, 0, &val); |
| if (ret < 0) |
| return ret; |
| |
| if (val >= 0x1000000) |
| return -EOVERFLOW; |
| |
| /* |
| * Check to see if any active exports exist. If they do exist, fail |
| * here as changing this information on the fly (underneath the |
| * initiator side OS dependent multipath code) could cause negative |
| * effects. |
| */ |
| if (dev->export_count) { |
| pr_err("Unable to set Company ID while %u exports exist\n", |
| dev->export_count); |
| return -EINVAL; |
| } |
| |
| t10_wwn->company_id = val; |
| |
| pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", |
| t10_wwn->company_id); |
| |
| return count; |
| } |
| |
| /* |
| * VPD page 0x80 Unit serial |
| */ |
| static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item, |
| char *page) |
| { |
| return sprintf(page, "T10 VPD Unit Serial Number: %s\n", |
| &to_t10_wwn(item)->unit_serial[0]); |
| } |
| |
| static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct t10_wwn *t10_wwn = to_t10_wwn(item); |
| struct se_device *dev = t10_wwn->t10_dev; |
| unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { }; |
| |
| /* |
| * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial |
| * from the struct scsi_device level firmware, do not allow |
| * VPD Unit Serial to be emulated. |
| * |
| * Note this struct scsi_device could also be emulating VPD |
| * information from its drivers/scsi LLD. But for now we assume |
| * it is doing 'the right thing' wrt a world wide unique |
| * VPD Unit Serial Number that OS dependent multipath can depend on. |
| */ |
| if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) { |
| pr_err("Underlying SCSI device firmware provided VPD" |
| " Unit Serial, ignoring request\n"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) { |
| pr_err("Emulated VPD Unit Serial exceeds" |
| " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN); |
| return -EOVERFLOW; |
| } |
| /* |
| * Check to see if any active $FABRIC_MOD exports exist. If they |
| * do exist, fail here as changing this information on the fly |
| * (underneath the initiator side OS dependent multipath code) |
| * could cause negative effects. |
| */ |
| if (dev->export_count) { |
| pr_err("Unable to set VPD Unit Serial while" |
| " active %d $FABRIC_MOD exports exist\n", |
| dev->export_count); |
| return -EINVAL; |
| } |
| |
| /* |
| * This currently assumes ASCII encoding for emulated VPD Unit Serial. |
| * |
| * Also, strip any newline added from the userspace |
| * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial |
| */ |
| 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; |
| |
| spin_lock(&t10_wwn->t10_vpd_lock); |
| list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { |
| if (!vpd->protocol_identifier_set) |
| continue; |
| |
| transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); |
| |
| if (len + strlen(buf) >= PAGE_SIZE) |
| break; |
| |
| len += sprintf(page+len, "%s", buf); |
| } |
| spin_unlock(&t10_wwn->t10_vpd_lock); |
| |
| return len; |
| } |
| |
| /* |
| * Generic wrapper for dumping VPD identifiers by association. |
| */ |
| #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ |
| static ssize_t target_wwn_##_name##_show(struct config_item *item, \ |
| char *page) \ |
| { \ |
| struct t10_wwn *t10_wwn = to_t10_wwn(item); \ |
| struct t10_vpd *vpd; \ |
| unsigned char buf[VPD_TMP_BUF_SIZE]; \ |
| ssize_t len = 0; \ |
| \ |
| spin_lock(&t10_wwn->t10_vpd_lock); \ |
| list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ |
| if (vpd->association != _assoc) \ |
| continue; \ |
| \ |
| memset(buf, 0, VPD_TMP_BUF_SIZE); \ |
| transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ |
| if (len + strlen(buf) >= PAGE_SIZE) \ |
| break; \ |
| len += sprintf(page+len, "%s", buf); \ |
| \ |
| memset(buf, 0, VPD_TMP_BUF_SIZE); \ |
| transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ |
| if (len + strlen(buf) >= PAGE_SIZE) \ |
| break; \ |
| len += sprintf(page+len, "%s", buf); \ |
| \ |
| memset(buf, 0, VPD_TMP_BUF_SIZE); \ |
| transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ |
| if (len + strlen(buf) >= PAGE_SIZE) \ |
| break; \ |
| len += sprintf(page+len, "%s", buf); \ |
| } \ |
| spin_unlock(&t10_wwn->t10_vpd_lock); \ |
| \ |
| return len; \ |
| } |
| |
| /* VPD page 0x83 Association: Logical Unit */ |
| DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); |
| /* VPD page 0x83 Association: Target Port */ |
| DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); |
| /* VPD page 0x83 Association: SCSI Target Device */ |
| DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); |
| |
| CONFIGFS_ATTR(target_wwn_, vendor_id); |
| CONFIGFS_ATTR(target_wwn_, product_id); |
| CONFIGFS_ATTR(target_wwn_, revision); |
| CONFIGFS_ATTR(target_wwn_, company_id); |
| CONFIGFS_ATTR(target_wwn_, vpd_unit_serial); |
| CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier); |
| CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit); |
| CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port); |
| CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device); |
| |
| static struct configfs_attribute *target_core_dev_wwn_attrs[] = { |
| &target_wwn_attr_vendor_id, |
| &target_wwn_attr_product_id, |
| &target_wwn_attr_revision, |
| &target_wwn_attr_company_id, |
| &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] = { }; |
| |
| pr_reg = dev->dev_pr_res_holder; |
| if (!pr_reg) |
| return sprintf(page, "No SPC-3 Reservation holder\n"); |
| |
| se_nacl = pr_reg->pr_reg_nacl; |
| core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN); |
| |
| return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n", |
| se_nacl->se_tpg->se_tpg_tfo->fabric_name, |
| se_nacl->initiatorname, i_buf); |
| } |
| |
| static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev, |
| char *page) |
| { |
| struct se_session *sess = dev->reservation_holder; |
| struct se_node_acl *se_nacl; |
| ssize_t len; |
| |
| if (sess) { |
| se_nacl = sess->se_node_acl; |
| len = sprintf(page, |
| "SPC-2 Reservation: %s Initiator: %s\n", |
| se_nacl->se_tpg->se_tpg_tfo->fabric_name, |
| se_nacl->initiatorname); |
| } else { |
| len = sprintf(page, "No SPC-2 Reservation holder\n"); |
| } |
| return len; |
| } |
| |
| static ssize_t target_pr_res_holder_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| int ret; |
| |
| if (!dev->dev_attrib.emulate_pr) |
| return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); |
| |
| if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) |
| return sprintf(page, "Passthrough\n"); |
| |
| spin_lock(&dev->dev_reservation_lock); |
| if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
| ret = target_core_dev_pr_show_spc2_res(dev, page); |
| else |
| ret = target_core_dev_pr_show_spc3_res(dev, page); |
| spin_unlock(&dev->dev_reservation_lock); |
| return ret; |
| } |
| |
| static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item, |
| char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| ssize_t len = 0; |
| |
| spin_lock(&dev->dev_reservation_lock); |
| if (!dev->dev_pr_res_holder) { |
| len = sprintf(page, "No SPC-3 Reservation holder\n"); |
| } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) { |
| len = sprintf(page, "SPC-3 Reservation: All Target" |
| " Ports registration\n"); |
| } else { |
| len = sprintf(page, "SPC-3 Reservation: Single" |
| " Target Port registration\n"); |
| } |
| |
| spin_unlock(&dev->dev_reservation_lock); |
| return len; |
| } |
| |
| static ssize_t target_pr_res_pr_generation_show(struct config_item *item, |
| char *page) |
| { |
| return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation); |
| } |
| |
| |
| static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item, |
| char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| struct se_node_acl *se_nacl; |
| struct se_portal_group *se_tpg; |
| struct t10_pr_registration *pr_reg; |
| const struct target_core_fabric_ops *tfo; |
| ssize_t len = 0; |
| |
| spin_lock(&dev->dev_reservation_lock); |
| pr_reg = dev->dev_pr_res_holder; |
| if (!pr_reg) { |
| len = sprintf(page, "No SPC-3 Reservation holder\n"); |
| goto out_unlock; |
| } |
| |
| se_nacl = pr_reg->pr_reg_nacl; |
| se_tpg = se_nacl->se_tpg; |
| tfo = se_tpg->se_tpg_tfo; |
| |
| len += sprintf(page+len, "SPC-3 Reservation: %s" |
| " Target Node Endpoint: %s\n", tfo->fabric_name, |
| tfo->tpg_get_wwn(se_tpg)); |
| len += sprintf(page+len, "SPC-3 Reservation: Relative Port" |
| " Identifier Tag: %hu %s Portal Group Tag: %hu" |
| " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi, |
| tfo->fabric_name, tfo->tpg_get_tag(se_tpg), |
| tfo->fabric_name, pr_reg->pr_aptpl_target_lun); |
| |
| out_unlock: |
| spin_unlock(&dev->dev_reservation_lock); |
| return len; |
| } |
| |
| |
| static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item, |
| char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| const struct target_core_fabric_ops *tfo; |
| struct t10_pr_registration *pr_reg; |
| unsigned char buf[384]; |
| char i_buf[PR_REG_ISID_ID_LEN]; |
| ssize_t len = 0; |
| int reg_count = 0; |
| |
| len += sprintf(page+len, "SPC-3 PR Registrations:\n"); |
| |
| spin_lock(&dev->t10_pr.registration_lock); |
| list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, |
| pr_reg_list) { |
| |
| memset(buf, 0, 384); |
| memset(i_buf, 0, PR_REG_ISID_ID_LEN); |
| tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo; |
| core_pr_dump_initiator_port(pr_reg, i_buf, |
| PR_REG_ISID_ID_LEN); |
| sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", |
| tfo->fabric_name, |
| pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key, |
| pr_reg->pr_res_generation); |
| |
| if (len + strlen(buf) >= PAGE_SIZE) |
| break; |
| |
| len += sprintf(page+len, "%s", buf); |
| reg_count++; |
| } |
| spin_unlock(&dev->t10_pr.registration_lock); |
| |
| if (!reg_count) |
| len += sprintf(page+len, "None\n"); |
| |
| return len; |
| } |
| |
| static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| struct t10_pr_registration *pr_reg; |
| ssize_t len = 0; |
| |
| spin_lock(&dev->dev_reservation_lock); |
| pr_reg = dev->dev_pr_res_holder; |
| if (pr_reg) { |
| len = sprintf(page, "SPC-3 Reservation Type: %s\n", |
| core_scsi3_pr_dump_type(pr_reg->pr_res_type)); |
| } else { |
| len = sprintf(page, "No SPC-3 Reservation holder\n"); |
| } |
| |
| spin_unlock(&dev->dev_reservation_lock); |
| return len; |
| } |
| |
| static ssize_t target_pr_res_type_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| |
| if (!dev->dev_attrib.emulate_pr) |
| return sprintf(page, "SPC_RESERVATIONS_DISABLED\n"); |
| if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) |
| return sprintf(page, "SPC_PASSTHROUGH\n"); |
| if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
| return sprintf(page, "SPC2_RESERVATIONS\n"); |
| |
| return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); |
| } |
| |
| static ssize_t target_pr_res_aptpl_active_show(struct config_item *item, |
| char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| |
| if (!dev->dev_attrib.emulate_pr || |
| (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) |
| return 0; |
| |
| return sprintf(page, "APTPL Bit Status: %s\n", |
| (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); |
| } |
| |
| static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item, |
| char *page) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| |
| if (!dev->dev_attrib.emulate_pr || |
| (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) |
| return 0; |
| |
| return sprintf(page, "Ready to process PR APTPL metadata..\n"); |
| } |
| |
| enum { |
| Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, |
| Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, |
| Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, |
| Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err |
| }; |
| |
| static match_table_t tokens = { |
| {Opt_initiator_fabric, "initiator_fabric=%s"}, |
| {Opt_initiator_node, "initiator_node=%s"}, |
| {Opt_initiator_sid, "initiator_sid=%s"}, |
| {Opt_sa_res_key, "sa_res_key=%s"}, |
| {Opt_res_holder, "res_holder=%d"}, |
| {Opt_res_type, "res_type=%d"}, |
| {Opt_res_scope, "res_scope=%d"}, |
| {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, |
| {Opt_mapped_lun, "mapped_lun=%u"}, |
| {Opt_target_fabric, "target_fabric=%s"}, |
| {Opt_target_node, "target_node=%s"}, |
| {Opt_tpgt, "tpgt=%d"}, |
| {Opt_port_rtpi, "port_rtpi=%d"}, |
| {Opt_target_lun, "target_lun=%u"}, |
| {Opt_err, NULL} |
| }; |
| |
| static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_device *dev = pr_to_dev(item); |
| unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; |
| unsigned char *t_fabric = NULL, *t_port = NULL; |
| char *orig, *ptr, *opts; |
| substring_t args[MAX_OPT_ARGS]; |
| unsigned long long tmp_ll; |
| u64 sa_res_key = 0; |
| u64 mapped_lun = 0, target_lun = 0; |
| int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; |
| u16 tpgt = 0; |
| u8 type = 0; |
| |
| if (!dev->dev_attrib.emulate_pr || |
| (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) |
| return count; |
| if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS) |
| return count; |
| |
| if (dev->export_count) { |
| pr_debug("Unable to process APTPL metadata while" |
| " active fabric exports exist\n"); |
| return -EINVAL; |
| } |
| |
| opts = kstrdup(page, GFP_KERNEL); |
| if (!opts) |
| return -ENOMEM; |
| |
| orig = opts; |
| while ((ptr = strsep(&opts, ",\n")) != NULL) { |
| if (!*ptr) |
| continue; |
| |
| token = match_token(ptr, tokens, args); |
| switch (token) { |
| case Opt_initiator_fabric: |
| i_fabric = match_strdup(args); |
| if (!i_fabric) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| break; |
| case Opt_initiator_node: |
| i_port = match_strdup(args); |
| if (!i_port) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) { |
| pr_err("APTPL metadata initiator_node=" |
| " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n", |
| PR_APTPL_MAX_IPORT_LEN); |
| ret = -EINVAL; |
| break; |
| } |
| break; |
| case Opt_initiator_sid: |
| isid = match_strdup(args); |
| if (!isid) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| if (strlen(isid) >= PR_REG_ISID_LEN) { |
| pr_err("APTPL metadata initiator_isid" |
| "= exceeds PR_REG_ISID_LEN: %d\n", |
| PR_REG_ISID_LEN); |
| ret = -EINVAL; |
| break; |
| } |
| break; |
| case Opt_sa_res_key: |
| ret = match_u64(args, &tmp_ll); |
| if (ret < 0) { |
| pr_err("kstrtoull() failed for sa_res_key=\n"); |
| goto out; |
| } |
| sa_res_key = (u64)tmp_ll; |
| break; |
| /* |
| * PR APTPL Metadata for Reservation |
| */ |
| case Opt_res_holder: |
| ret = match_int(args, &arg); |
| if (ret) |
| goto out; |
| res_holder = arg; |
| break; |
| case Opt_res_type: |
| ret = match_int(args, &arg); |
| if (ret) |
| goto out; |
| type = (u8)arg; |
| break; |
| case Opt_res_scope: |
| ret = match_int(args, &arg); |
| if (ret) |
| goto out; |
| break; |
| case Opt_res_all_tg_pt: |
| ret = match_int(args, &arg); |
| if (ret) |
| goto out; |
| all_tg_pt = (int)arg; |
| break; |
| case Opt_mapped_lun: |
| ret = match_u64(args, &tmp_ll); |
| if (ret) |
| goto out; |
| mapped_lun = (u64)tmp_ll; |
| break; |
| /* |
| * PR APTPL Metadata for Target Port |
| */ |
| case Opt_target_fabric: |
| t_fabric = match_strdup(args); |
| if (!t_fabric) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| break; |
| case Opt_target_node: |
| t_port = match_strdup(args); |
| if (!t_port) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) { |
| pr_err("APTPL metadata target_node=" |
| " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n", |
| PR_APTPL_MAX_TPORT_LEN); |
| ret = -EINVAL; |
| break; |
| } |
| break; |
| case Opt_tpgt: |
| ret = match_int(args, &arg); |
| if (ret) |
| goto out; |
| tpgt = (u16)arg; |
| break; |
| case Opt_port_rtpi: |
| ret = match_int(args, &arg); |
| if (ret) |
| goto out; |
| break; |
| case Opt_target_lun: |
| ret = match_u64(args, &tmp_ll); |
| if (ret) |
| goto out; |
| target_lun = (u64)tmp_ll; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (!i_port || !t_port || !sa_res_key) { |
| pr_err("Illegal parameters for APTPL registration\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| if (res_holder && !(type)) { |
| pr_err("Illegal PR type: 0x%02x for reservation" |
| " holder\n", type); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key, |
| i_port, isid, mapped_lun, t_port, tpgt, target_lun, |
| res_holder, all_tg_pt, type); |
| out: |
| kfree(i_fabric); |
| kfree(i_port); |
| kfree(isid); |
| kfree(t_fabric); |
| kfree(t_port); |
| kfree(orig); |
| return (ret == 0) ? count : ret; |
| } |
| |
| |
| CONFIGFS_ATTR_RO(target_pr_, res_holder); |
| CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts); |
| CONFIGFS_ATTR_RO(target_pr_, res_pr_generation); |
| CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port); |
| CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts); |
| CONFIGFS_ATTR_RO(target_pr_, res_pr_type); |
| CONFIGFS_ATTR_RO(target_pr_, res_type); |
| CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active); |
| CONFIGFS_ATTR(target_pr_, res_aptpl_metadata); |
| |
| static struct configfs_attribute *target_core_dev_pr_attrs[] = { |
| &target_pr_attr_res_holder, |
| &target_pr_attr_res_pr_all_tgt_pts, |
| &target_pr_attr_res_pr_generation, |
| &target_pr_attr_res_pr_holder_tg_port, |
| &target_pr_attr_res_pr_registered_i_pts, |
| &target_pr_attr_res_pr_type, |
| &target_pr_attr_res_type, |
| &target_pr_attr_res_aptpl_active, |
| &target_pr_attr_res_aptpl_metadata, |
| NULL, |
| }; |
| |
| TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs); |
| |
| /* End functions for struct config_item_type tb_dev_pr_cit */ |
| |
| /* Start functions for struct config_item_type tb_dev_cit */ |
| |
| static inline struct se_device *to_device(struct config_item *item) |
| { |
| return container_of(to_config_group(item), struct se_device, dev_group); |
| } |
| |
| static ssize_t target_dev_info_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = to_device(item); |
| int bl = 0; |
| ssize_t read_bytes = 0; |
| |
| transport_dump_dev_state(dev, page, &bl); |
| read_bytes += bl; |
| read_bytes += dev->transport->show_configfs_dev_params(dev, |
| page+read_bytes); |
| return read_bytes; |
| } |
| |
| static ssize_t target_dev_control_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_device *dev = to_device(item); |
| |
| return dev->transport->set_configfs_dev_params(dev, page, count); |
| } |
| |
| static ssize_t target_dev_alias_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = to_device(item); |
| |
| if (!(dev->dev_flags & DF_USING_ALIAS)) |
| return 0; |
| |
| return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias); |
| } |
| |
| static ssize_t target_dev_alias_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_device *dev = to_device(item); |
| struct se_hba *hba = dev->se_hba; |
| ssize_t read_bytes; |
| |
| if (count > (SE_DEV_ALIAS_LEN-1)) { |
| pr_err("alias count: %d exceeds" |
| " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, |
| SE_DEV_ALIAS_LEN-1); |
| return -EINVAL; |
| } |
| |
| read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); |
| if (!read_bytes) |
| return -EINVAL; |
| if (dev->dev_alias[read_bytes - 1] == '\n') |
| dev->dev_alias[read_bytes - 1] = '\0'; |
| |
| dev->dev_flags |= DF_USING_ALIAS; |
| |
| pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", |
| config_item_name(&hba->hba_group.cg_item), |
| config_item_name(&dev->dev_group.cg_item), |
| dev->dev_alias); |
| |
| return read_bytes; |
| } |
| |
| static ssize_t target_dev_udev_path_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = to_device(item); |
| |
| if (!(dev->dev_flags & DF_USING_UDEV_PATH)) |
| return 0; |
| |
| return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path); |
| } |
| |
| static ssize_t target_dev_udev_path_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_device *dev = to_device(item); |
| struct se_hba *hba = dev->se_hba; |
| ssize_t read_bytes; |
| |
| if (count > (SE_UDEV_PATH_LEN-1)) { |
| pr_err("udev_path count: %d exceeds" |
| " SE_UDEV_PATH_LEN-1: %u\n", (int)count, |
| SE_UDEV_PATH_LEN-1); |
| return -EINVAL; |
| } |
| |
| read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN, |
| "%s", page); |
| if (!read_bytes) |
| return -EINVAL; |
| if (dev->udev_path[read_bytes - 1] == '\n') |
| dev->udev_path[read_bytes - 1] = '\0'; |
| |
| dev->dev_flags |= DF_USING_UDEV_PATH; |
| |
| pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", |
| config_item_name(&hba->hba_group.cg_item), |
| config_item_name(&dev->dev_group.cg_item), |
| dev->udev_path); |
| |
| return read_bytes; |
| } |
| |
| static ssize_t target_dev_enable_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = to_device(item); |
| |
| return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev)); |
| } |
| |
| static ssize_t target_dev_enable_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_device *dev = to_device(item); |
| char *ptr; |
| int ret; |
| |
| ptr = strstr(page, "1"); |
| if (!ptr) { |
| pr_err("For dev_enable ops, only valid value" |
| " is \"1\"\n"); |
| return -EINVAL; |
| } |
| |
| ret = target_configure_device(dev); |
| if (ret) |
| return ret; |
| return count; |
| } |
| |
| static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page) |
| { |
| struct se_device *dev = to_device(item); |
| struct config_item *lu_ci; |
| struct t10_alua_lu_gp *lu_gp; |
| struct t10_alua_lu_gp_member *lu_gp_mem; |
| ssize_t len = 0; |
| |
| lu_gp_mem = dev->dev_alua_lu_gp_mem; |
| if (!lu_gp_mem) |
| return 0; |
| |
| spin_lock(&lu_gp_mem->lu_gp_mem_lock); |
| lu_gp = lu_gp_mem->lu_gp; |
| if (lu_gp) { |
| lu_ci = &lu_gp->lu_gp_group.cg_item; |
| len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", |
| config_item_name(lu_ci), lu_gp->lu_gp_id); |
| } |
| spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
| |
| return len; |
| } |
| |
| static ssize_t target_dev_alua_lu_gp_store(struct config_item *item, |
| const char *page, size_t count) |
| { |
| struct se_device *dev = to_device(item); |
| struct se_hba *hba = dev->se_hba; |
| struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; |
| struct t10_alua_lu_gp_member *lu_gp_mem; |
| unsigned char buf[LU_GROUP_NAME_BUF] = { }; |
| int move = 0; |
| |
| lu_gp_mem = dev->dev_alua_lu_gp_mem; |
| if (!lu_gp_mem) |
| return count; |
| |
| if (count > LU_GROUP_NAME_BUF) { |
| pr_err("ALUA LU Group Alias too large!\n"); |
| return -EINVAL; |
| } |
| 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] = { }; |
| |
| 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 invalid tg_pt_gp ID\n"); |
| 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 set ALUA access status on invalid tg_pt_gp ID\n"); |
| 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 set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \ |
| 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] = { }; |
| |
| spin_lock(&tg_pt_gp->tg_pt_gp_lock); |
| list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list, |
| lun_tg_pt_gp_link) { |
| struct se_portal_group *tpg = lun->lun_tpg; |
| |
| cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" |
| "/%s\n", tpg->se_tpg_tfo->fabric_name, |
| tpg->se_tpg_tfo->tpg_get_wwn(tpg), |
| tpg->se_tpg_tfo->tpg_get_tag(tpg), |
| config_item_name(&lun->lun_group.cg_item)); |
|