| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Nicholas Bellinger | 7732 | 50.24% | 27 | 22.13% |
| Christoph Hellwig | 3708 | 24.09% | 17 | 13.93% |
| Hannes Reinecke | 749 | 4.87% | 8 | 6.56% |
| Alan Adamson | 478 | 3.11% | 1 | 0.82% |
| David Disseldorp | 443 | 2.88% | 9 | 7.38% |
| Michael Christie | 361 | 2.35% | 7 | 5.74% |
| Lee Duncan | 329 | 2.14% | 2 | 1.64% |
| Dmitry Bogdanov | 283 | 1.84% | 3 | 2.46% |
| Maurizio Lombardi | 189 | 1.23% | 3 | 2.46% |
| Andy Grover | 180 | 1.17% | 7 | 5.74% |
| Bodo Stroesser | 169 | 1.10% | 3 | 2.46% |
| Dmitriy Monakhov | 132 | 0.86% | 1 | 0.82% |
| Sergey Samoylenko | 121 | 0.79% | 1 | 0.82% |
| Jamie Pocas | 118 | 0.77% | 1 | 0.82% |
| Jesper Juhl | 109 | 0.71% | 1 | 0.82% |
| Sebastian Andrzej Siewior | 41 | 0.27% | 2 | 1.64% |
| Bart Van Assche | 34 | 0.22% | 5 | 4.10% |
| Dan Carpenter | 32 | 0.21% | 2 | 1.64% |
| Azeem Shaikh | 32 | 0.21% | 2 | 1.64% |
| Roland Dreier | 28 | 0.18% | 3 | 2.46% |
| Christophe Jaillet | 17 | 0.11% | 1 | 0.82% |
| Jingoo Han | 16 | 0.10% | 1 | 0.82% |
| Chaitanya Kulkarni | 14 | 0.09% | 1 | 0.82% |
| Bryant G. Ly | 13 | 0.08% | 2 | 1.64% |
| Peter Senna Tschudin | 13 | 0.08% | 1 | 0.82% |
| Tang Wenji | 9 | 0.06% | 1 | 0.82% |
| Juergen Gross | 9 | 0.06% | 1 | 0.82% |
| Bhumika Goyal | 7 | 0.05% | 1 | 0.82% |
| Colin Ian King | 6 | 0.04% | 1 | 0.82% |
| Al Viro | 6 | 0.04% | 1 | 0.82% |
| Tregaron Bayly | 5 | 0.03% | 1 | 0.82% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.82% |
| Axel Lin | 2 | 0.01% | 1 | 0.82% |
| Jörn Engel | 2 | 0.01% | 1 | 0.82% |
| Christophe Vu-Brugier | 1 | 0.01% | 1 | 0.82% |
| Masanari Iida | 1 | 0.01% | 1 | 0.82% |
| Total | 15391 | 122 |
// 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/kstrtox.h> #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_disable_feature(struct se_portal_group *se_tpg) { return 0; } static u32 target_default_get_inst_index(struct se_portal_group *se_tpg) { return 1; } static u32 target_default_sess_get_index(struct se_session *se_sess) { return 0; } static void target_set_default_node_attributes(struct se_node_acl *se_acl) { } static int target_default_get_cmd_state(struct se_cmd *se_cmd) { return 0; } 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->release_cmd) { pr_err("Missing tfo->release_cmd()\n"); return -EINVAL; } if (!tfo->write_pending) { pr_err("Missing tfo->write_pending()\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; } static void target_set_default_ops(struct target_core_fabric_ops *tfo) { if (!tfo->tpg_check_demo_mode) tfo->tpg_check_demo_mode = target_disable_feature; if (!tfo->tpg_check_demo_mode_cache) tfo->tpg_check_demo_mode_cache = target_disable_feature; if (!tfo->tpg_check_demo_mode_write_protect) tfo->tpg_check_demo_mode_write_protect = target_disable_feature; if (!tfo->tpg_check_prod_mode_write_protect) tfo->tpg_check_prod_mode_write_protect = target_disable_feature; if (!tfo->tpg_get_inst_index) tfo->tpg_get_inst_index = target_default_get_inst_index; if (!tfo->sess_get_index) tfo->sess_get_index = target_default_sess_get_index; if (!tfo->set_default_node_attributes) tfo->set_default_node_attributes = target_set_default_node_attributes; if (!tfo->get_cmd_state) tfo->get_cmd_state = target_default_get_cmd_state; } int target_register_template(const struct target_core_fabric_ops *fo) { struct target_core_fabric_ops *tfo; 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; } tfo = kzalloc(sizeof(struct target_core_fabric_ops), GFP_KERNEL); if (!tfo) { kfree(tf); pr_err("%s: could not allocate memory!\n", __func__); return -ENOMEM; } memcpy(tfo, fo, sizeof(*tfo)); target_set_default_ops(tfo); INIT_LIST_HEAD(&tf->tf_list); atomic_set(&tf->tf_access_cnt, 0); tf->tf_ops = tfo; 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->tf_ops); 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); DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc); DEF_CONFIGFS_ATTRIB_SHOW(submit_type); #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 = kstrtobool(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. */ strscpy(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 = kstrtobool(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 { strscpy(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 = kstrtobool(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 = kstrtobool(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 int target_try_configure_unmap(struct se_device *dev, const char *config_opt) { if (!dev->transport->configure_unmap) { pr_err("Generic Block Discard not supported\n"); return -ENOSYS; } if (!target_dev_configured(dev)) { pr_err("Generic Block Discard setup for %s requires device to be configured\n", config_opt); return -ENODEV; } if (!dev->transport->configure_unmap(dev)) { pr_err("Generic Block Discard setup for %s failed\n", config_opt); return -ENOSYS; } return 0; } static ssize_t emulate_tpu_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 = kstrtobool(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) { ret = target_try_configure_unmap(dev, "emulate_tpu"); if (ret) return ret; } 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); struct se_device *dev = da->da_dev; bool flag; int ret; ret = kstrtobool(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) { ret = target_try_configure_unmap(dev, "emulate_tpws"); if (ret) return ret; } 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 = kstrtobool(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 = kstrtobool(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 = kstrtobool(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 = kstrtobool(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); struct se_device *dev = da->da_dev; bool flag; int ret; ret = kstrtobool(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) { ret = target_try_configure_unmap(dev, "unmap_zeroes_data"); if (ret) return ret; } 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; 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 = kstrtobool(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 = kstrtobool(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; } static ssize_t emulate_rsoc_store(struct config_item *item, const char *page, size_t count) { struct se_dev_attrib *da = to_attrib(item); bool flag; int ret; ret = kstrtobool(page, &flag); if (ret < 0) return ret; da->emulate_rsoc = flag; pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n", da->da_dev, flag); return count; } static ssize_t submit_type_store(struct config_item *item, const char *page, size_t count) { struct se_dev_attrib *da = to_attrib(item); int ret; u8 val; ret = kstrtou8(page, 0, &val); if (ret < 0) return ret; if (val > TARGET_QUEUE_SUBMIT) return -EINVAL; da->submit_type = val; 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(, emulate_rsoc); 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); CONFIGFS_ATTR(, submit_type); /* * 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, &attr_emulate_rsoc, &attr_submit_type, 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, &attr_submit_type, 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; ssize_t len; ssize_t ret; len = strscpy(buf, page, sizeof(buf)); if (len > 0) { /* Strip any newline added from userspace. */ stripped = strstrip(buf); len = strlen(stripped); } if (len < 0 || 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); strscpy(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; ssize_t len; ssize_t ret; len = strscpy(buf, page, sizeof(buf)); if (len > 0) { /* Strip any newline added from userspace. */ stripped = strstrip(buf); len = strlen(stripped); } if (len < 0 || 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); strscpy(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; ssize_t len; ssize_t ret; len = strscpy(buf, page, sizeof(buf)); if (len > 0) { /* Strip any newline added from userspace. */ stripped = strstrip(buf); len = strlen(stripped); } if (len < 0 || 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); strscpy(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)); 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_lock(&target_devices_lock); target_devices++; mutex_unlock(&target_devices_lock); 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_lock(&target_devices_lock); target_devices--; mutex_unlock(&target_devices_lock); 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; 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; struct cred *kern_cred; const struct cred *old_cred; 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; /* We use the kernel credentials to access the target directory */ kern_cred = prepare_kernel_cred(&init_task); if (!kern_cred) { ret = -ENOMEM; goto out; } old_cred = override_creds(kern_cred); target_init_dbroot(); revert_creds(old_cred); put_cred(kern_cred); return 0; out: target_xcopy_release_pt(); 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);
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