/******************************************************************************* * Filename: target_core_configfs.c * * This file contains ConfigFS logic for the Generic Target Engine project. * * Copyright (c) 2008-2011 Rising Tide Systems * Copyright (c) 2008-2011 Linux-iSCSI.org * * Nicholas A. Bellinger * * based on configfs Copyright (C) 2005 Oracle. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "target_core_alua.h" #include "target_core_hba.h" #include "target_core_pr.h" #include "target_core_rd.h" #include "target_core_stat.h" extern struct t10_alua_lu_gp *default_lu_gp; static struct list_head g_tf_list; static struct mutex g_tf_lock; struct target_core_configfs_attribute { struct configfs_attribute attr; ssize_t (*show)(void *, char *); ssize_t (*store)(void *, const char *, size_t); }; static struct config_group target_core_hbagroup; static struct config_group alua_group; static struct config_group alua_lu_gps_group; static DEFINE_SPINLOCK(se_device_lock); static LIST_HEAD(se_dev_list); static inline struct se_hba * item_to_hba(struct config_item *item) { return container_of(to_config_group(item), struct se_hba, hba_group); } /* * Attributes for /sys/kernel/config/target/ */ static ssize_t target_core_attr_show(struct config_item *item, struct configfs_attribute *attr, char *page) { return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s" " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION, utsname()->sysname, utsname()->machine); } static struct configfs_item_operations target_core_fabric_item_ops = { .show_attribute = target_core_attr_show, }; static struct configfs_attribute target_core_item_attr_version = { .ca_owner = THIS_MODULE, .ca_name = "version", .ca_mode = S_IRUGO, }; static struct target_fabric_configfs *target_core_get_fabric( const char *name) { struct target_fabric_configfs *tf; if (!name) return NULL; mutex_lock(&g_tf_lock); list_for_each_entry(tf, &g_tf_list, tf_list) { if (!strcmp(tf->tf_name, name)) { atomic_inc(&tf->tf_access_cnt); mutex_unlock(&g_tf_lock); return tf; } } mutex_unlock(&g_tf_lock); return NULL; } /* * Called from struct target_core_group_ops->make_group() */ static struct config_group *target_core_register_fabric( struct config_group *group, const char *name) { struct target_fabric_configfs *tf; int ret; pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:" " %s\n", group, name); /* * Ensure that TCM subsystem plugins are loaded at this point for * using the RAMDISK_DR virtual LUN 0 and all other struct se_port * LUN symlinks. */ if (transport_subsystem_check_init() < 0) return ERR_PTR(-EINVAL); /* * Below are some hardcoded request_module() calls to automatically * local fabric modules when the following is called: * * mkdir -p /sys/kernel/config/target/$MODULE_NAME * * Note that this does not limit which TCM fabric module can be * registered, but simply provids auto loading logic for modules with * mkdir(2) system calls with known TCM fabric modules. */ if (!strncmp(name, "iscsi", 5)) { /* * Automatically load the LIO Target fabric module when the * following is called: * * mkdir -p $CONFIGFS/target/iscsi */ ret = request_module("iscsi_target_mod"); if (ret < 0) { pr_err("request_module() failed for" " iscsi_target_mod.ko: %d\n", ret); return ERR_PTR(-EINVAL); } } else if (!strncmp(name, "loopback", 8)) { /* * Automatically load the tcm_loop fabric module when the * following is called: * * mkdir -p $CONFIGFS/target/loopback */ ret = request_module("tcm_loop"); if (ret < 0) { pr_err("request_module() failed for" " tcm_loop.ko: %d\n", ret); return ERR_PTR(-EINVAL); } } tf = target_core_get_fabric(name); if (!tf) { pr_err("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_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_CIT_TMPL(tf)->tfc_wwn_cit); tf->tf_group.default_groups = tf->tf_default_groups; tf->tf_group.default_groups[0] = &tf->tf_disc_group; tf->tf_group.default_groups[1] = NULL; config_group_init_type_name(&tf->tf_group, name, &TF_CIT_TMPL(tf)->tfc_wwn_cit); config_group_init_type_name(&tf->tf_disc_group, "discovery_auth", &TF_CIT_TMPL(tf)->tfc_discovery_cit); pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:" " %s\n", tf->tf_group.cg_item.ci_name); /* * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item() */ tf->tf_ops.tf_subsys = tf->tf_subsys; tf->tf_fabric = &tf->tf_group.cg_item; pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric" " for %s\n", name); return &tf->tf_group; } /* * Called from struct target_core_group_ops->drop_item() */ static void target_core_deregister_fabric( struct config_group *group, struct config_item *item) { struct target_fabric_configfs *tf = container_of( to_config_group(item), struct target_fabric_configfs, tf_group); struct config_group *tf_group; struct config_item *df_item; int i; 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_name); atomic_dec(&tf->tf_access_cnt); pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing" " tf->tf_fabric for %s\n", tf->tf_name); tf->tf_fabric = NULL; pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci" " %s\n", config_item_name(item)); tf_group = &tf->tf_group; for (i = 0; tf_group->default_groups[i]; i++) { df_item = &tf_group->default_groups[i]->cg_item; tf_group->default_groups[i] = NULL; config_item_put(df_item); } config_item_put(item); } static struct configfs_group_operations target_core_fabric_group_ops = { .make_group = &target_core_register_fabric, .drop_item = &target_core_deregister_fabric, }; /* * All item attributes appearing in /sys/kernel/target/ appear here. */ static struct configfs_attribute *target_core_fabric_item_attrs[] = { &target_core_item_attr_version, NULL, }; /* * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/ */ static struct config_item_type target_core_fabrics_item = { .ct_item_ops = &target_core_fabric_item_ops, .ct_group_ops = &target_core_fabric_group_ops, .ct_attrs = target_core_fabric_item_attrs, .ct_owner = THIS_MODULE, }; static struct configfs_subsystem target_core_fabrics = { .su_group = { .cg_item = { .ci_namebuf = "target", .ci_type = &target_core_fabrics_item, }, }, }; static struct configfs_subsystem *target_core_subsystem[] = { &target_core_fabrics, NULL, }; /*############################################################################## // Start functions called by external Target Fabrics Modules //############################################################################*/ /* * First function called by fabric modules to: * * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer. * 2) Add struct target_fabric_configfs to g_tf_list * 3) Return struct target_fabric_configfs to fabric module to be passed * into target_fabric_configfs_register(). */ struct target_fabric_configfs *target_fabric_configfs_init( struct module *fabric_mod, const char *name) { struct target_fabric_configfs *tf; if (!(name)) { pr_err("Unable to locate passed fabric name\n"); return ERR_PTR(-EINVAL); } if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) { pr_err("Passed name: %s exceeds TARGET_FABRIC" "_NAME_SIZE\n", name); return ERR_PTR(-EINVAL); } tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL); if (!tf) return ERR_PTR(-ENOMEM); INIT_LIST_HEAD(&tf->tf_list); atomic_set(&tf->tf_access_cnt, 0); /* * Setup the default generic struct config_item_type's (cits) in * struct target_fabric_configfs->tf_cit_tmpl */ tf->tf_module = fabric_mod; target_fabric_setup_cits(tf); tf->tf_subsys = target_core_subsystem[0]; snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name); mutex_lock(&g_tf_lock); list_add_tail(&tf->tf_list, &g_tf_list); mutex_unlock(&g_tf_lock); pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>" ">>>>>>>>>>>>>>\n"); pr_debug("Initialized struct target_fabric_configfs: %p for" " %s\n", tf, tf->tf_name); return tf; } EXPORT_SYMBOL(target_fabric_configfs_init); /* * Called by fabric plugins after FAILED target_fabric_configfs_register() call. */ void target_fabric_configfs_free( struct target_fabric_configfs *tf) { mutex_lock(&g_tf_lock); list_del(&tf->tf_list); mutex_unlock(&g_tf_lock); kfree(tf); } EXPORT_SYMBOL(target_fabric_configfs_free); /* * Perform a sanity check of the passed tf->tf_ops before completing * TCM fabric module registration. */ static int target_fabric_tf_ops_check( struct target_fabric_configfs *tf) { struct target_core_fabric_ops *tfo = &tf->tf_ops; if (!tfo->get_fabric_name) { pr_err("Missing tfo->get_fabric_name()\n"); return -EINVAL; } if (!tfo->get_fabric_proto_ident) { pr_err("Missing tfo->get_fabric_proto_ident()\n"); return -EINVAL; } if (!tfo->tpg_get_wwn) { pr_err("Missing tfo->tpg_get_wwn()\n"); return -EINVAL; } if (!tfo->tpg_get_tag) { pr_err("Missing tfo->tpg_get_tag()\n"); return -EINVAL; } if (!tfo->tpg_get_default_depth) { pr_err("Missing tfo->tpg_get_default_depth()\n"); return -EINVAL; } if (!tfo->tpg_get_pr_transport_id) { pr_err("Missing tfo->tpg_get_pr_transport_id()\n"); return -EINVAL; } if (!tfo->tpg_get_pr_transport_id_len) { pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n"); return -EINVAL; } if (!tfo->tpg_check_demo_mode) { pr_err("Missing tfo->tpg_check_demo_mode()\n"); return -EINVAL; } if (!tfo->tpg_check_demo_mode_cache) { pr_err("Missing tfo->tpg_check_demo_mode_cache()\n"); return -EINVAL; } if (!tfo->tpg_check_demo_mode_write_protect) { pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n"); return -EINVAL; } if (!tfo->tpg_check_prod_mode_write_protect) { pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n"); return -EINVAL; } if (!tfo->tpg_alloc_fabric_acl) { pr_err("Missing tfo->tpg_alloc_fabric_acl()\n"); return -EINVAL; } if (!tfo->tpg_release_fabric_acl) { pr_err("Missing tfo->tpg_release_fabric_acl()\n"); return -EINVAL; } if (!tfo->tpg_get_inst_index) { pr_err("Missing tfo->tpg_get_inst_index()\n"); return -EINVAL; } if (!tfo->release_cmd) { pr_err("Missing tfo->release_cmd()\n"); return -EINVAL; } if (!tfo->shutdown_session) { pr_err("Missing tfo->shutdown_session()\n"); return -EINVAL; } if (!tfo->close_session) { pr_err("Missing tfo->close_session()\n"); return -EINVAL; } if (!tfo->stop_session) { pr_err("Missing tfo->stop_session()\n"); return -EINVAL; } if (!tfo->fall_back_to_erl0) { pr_err("Missing tfo->fall_back_to_erl0()\n"); return -EINVAL; } if (!tfo->sess_logged_in) { pr_err("Missing tfo->sess_logged_in()\n"); return -EINVAL; } if (!tfo->sess_get_index) { pr_err("Missing tfo->sess_get_index()\n"); return -EINVAL; } if (!tfo->write_pending) { pr_err("Missing tfo->write_pending()\n"); return -EINVAL; } if (!tfo->write_pending_status) { pr_err("Missing tfo->write_pending_status()\n"); return -EINVAL; } if (!tfo->set_default_node_attributes) { pr_err("Missing tfo->set_default_node_attributes()\n"); return -EINVAL; } if (!tfo->get_task_tag) { pr_err("Missing tfo->get_task_tag()\n"); return -EINVAL; } if (!tfo->get_cmd_state) { pr_err("Missing tfo->get_cmd_state()\n"); return -EINVAL; } if (!tfo->queue_data_in) { pr_err("Missing tfo->queue_data_in()\n"); return -EINVAL; } if (!tfo->queue_status) { pr_err("Missing tfo->queue_status()\n"); return -EINVAL; } if (!tfo->queue_tm_rsp) { pr_err("Missing tfo->queue_tm_rsp()\n"); return -EINVAL; } if (!tfo->set_fabric_sense_len) { pr_err("Missing tfo->set_fabric_sense_len()\n"); return -EINVAL; } if (!tfo->get_fabric_sense_len) { pr_err("Missing tfo->get_fabric_sense_len()\n"); return -EINVAL; } if (!tfo->is_state_remove) { pr_err("Missing tfo->is_state_remove()\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; } /* * Called 2nd from fabric module with returned parameter of * struct target_fabric_configfs * from target_fabric_configfs_init(). * * Upon a successful registration, the new fabric's struct config_item is * return. Also, a pointer to this struct is set in the passed * struct target_fabric_configfs. */ int target_fabric_configfs_register( struct target_fabric_configfs *tf) { int ret; if (!tf) { pr_err("Unable to locate target_fabric_configfs" " pointer\n"); return -EINVAL; } if (!tf->tf_subsys) { pr_err("Unable to target struct config_subsystem" " pointer\n"); return -EINVAL; } ret = target_fabric_tf_ops_check(tf); if (ret < 0) return ret; pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>" ">>>>>>>>>>\n"); return 0; } EXPORT_SYMBOL(target_fabric_configfs_register); void target_fabric_configfs_deregister( struct target_fabric_configfs *tf) { struct configfs_subsystem *su; if (!tf) { pr_err("Unable to locate passed target_fabric_" "configfs\n"); return; } su = tf->tf_subsys; if (!su) { pr_err("Unable to locate passed tf->tf_subsys" " pointer\n"); return; } pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>" ">>>>>>>>>>>>\n"); mutex_lock(&g_tf_lock); if (atomic_read(&tf->tf_access_cnt)) { mutex_unlock(&g_tf_lock); pr_err("Non zero tf->tf_access_cnt for fabric %s\n", tf->tf_name); BUG(); } list_del(&tf->tf_list); mutex_unlock(&g_tf_lock); pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:" " %s\n", tf->tf_name); tf->tf_module = NULL; tf->tf_subsys = NULL; kfree(tf); pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>" ">>>>>\n"); } EXPORT_SYMBOL(target_fabric_configfs_deregister); /*############################################################################## // Stop functions called by external Target Fabrics Modules //############################################################################*/ /* Start functions for struct config_item_type target_core_dev_attrib_cit */ #define DEF_DEV_ATTRIB_SHOW(_name) \ static ssize_t target_core_dev_show_attr_##_name( \ struct se_dev_attrib *da, \ char *page) \ { \ struct se_device *dev; \ struct se_subsystem_dev *se_dev = da->da_sub_dev; \ ssize_t rb; \ \ spin_lock(&se_dev->se_dev_lock); \ dev = se_dev->se_dev_ptr; \ if (!dev) { \ spin_unlock(&se_dev->se_dev_lock); \ return -ENODEV; \ } \ rb = snprintf(page, PAGE_SIZE, "%u\n", \ (u32)dev->se_sub_dev->se_dev_attrib._name); \ spin_unlock(&se_dev->se_dev_lock); \ \ return rb; \ } #define DEF_DEV_ATTRIB_STORE(_name) \ static ssize_t target_core_dev_store_attr_##_name( \ struct se_dev_attrib *da, \ const char *page, \ size_t count) \ { \ struct se_device *dev; \ struct se_subsystem_dev *se_dev = da->da_sub_dev; \ unsigned long val; \ int ret; \ \ spin_lock(&se_dev->se_dev_lock); \ dev = se_dev->se_dev_ptr; \ if (!dev) { \ spin_unlock(&se_dev->se_dev_lock); \ return -ENODEV; \ } \ ret = strict_strtoul(page, 0, &val); \ if (ret < 0) { \ spin_unlock(&se_dev->se_dev_lock); \ pr_err("strict_strtoul() failed with" \ " ret: %d\n", ret); \ return -EINVAL; \ } \ ret = se_dev_set_##_name(dev, (u32)val); \ spin_unlock(&se_dev->se_dev_lock); \ \ return (!ret) ? count : -EINVAL; \ } #define DEF_DEV_ATTRIB(_name) \ DEF_DEV_ATTRIB_SHOW(_name); \ DEF_DEV_ATTRIB_STORE(_name); #define DEF_DEV_ATTRIB_RO(_name) \ DEF_DEV_ATTRIB_SHOW(_name); CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib); #define SE_DEV_ATTR(_name, _mode) \ static struct target_core_dev_attrib_attribute \ target_core_dev_attrib_##_name = \ __CONFIGFS_EATTR(_name, _mode, \ target_core_dev_show_attr_##_name, \ target_core_dev_store_attr_##_name); #define SE_DEV_ATTR_RO(_name); \ static struct target_core_dev_attrib_attribute \ target_core_dev_attrib_##_name = \ __CONFIGFS_EATTR_RO(_name, \ target_core_dev_show_attr_##_name); DEF_DEV_ATTRIB(emulate_dpo); SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(emulate_fua_write); SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(emulate_fua_read); SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(emulate_write_cache); SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl); SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(emulate_tas); SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(emulate_tpu); SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(emulate_tpws); SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(enforce_pr_isids); SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(is_nonrot); SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB_RO(hw_block_size); SE_DEV_ATTR_RO(hw_block_size); DEF_DEV_ATTRIB(block_size); SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB_RO(hw_max_sectors); SE_DEV_ATTR_RO(hw_max_sectors); DEF_DEV_ATTRIB(max_sectors); SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(optimal_sectors); SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB_RO(hw_queue_depth); SE_DEV_ATTR_RO(hw_queue_depth); DEF_DEV_ATTRIB(queue_depth); SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(task_timeout); SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(max_unmap_lba_count); SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(max_unmap_block_desc_count); SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(unmap_granularity); SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR); DEF_DEV_ATTRIB(unmap_granularity_alignment); SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR); CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group); static struct configfs_attribute *target_core_dev_attrib_attrs[] = { &target_core_dev_attrib_emulate_dpo.attr, &target_core_dev_attrib_emulate_fua_write.attr, &target_core_dev_attrib_emulate_fua_read.attr, &target_core_dev_attrib_emulate_write_cache.attr, &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr, &target_core_dev_attrib_emulate_tas.attr, &target_core_dev_attrib_emulate_tpu.attr, &target_core_dev_attrib_emulate_tpws.attr, &target_core_dev_attrib_enforce_pr_isids.attr, &target_core_dev_attrib_is_nonrot.attr, &target_core_dev_attrib_hw_block_size.attr, &target_core_dev_attrib_block_size.attr, &target_core_dev_attrib_hw_max_sectors.attr, &target_core_dev_attrib_max_sectors.attr, &target_core_dev_attrib_optimal_sectors.attr, &target_core_dev_attrib_hw_queue_depth.attr, &target_core_dev_attrib_queue_depth.attr, &target_core_dev_attrib_task_timeout.attr, &target_core_dev_attrib_max_unmap_lba_count.attr, &target_core_dev_attrib_max_unmap_block_desc_count.attr, &target_core_dev_attrib_unmap_granularity.attr, &target_core_dev_attrib_unmap_granularity_alignment.attr, NULL, }; static struct configfs_item_operations target_core_dev_attrib_ops = { .show_attribute = target_core_dev_attrib_attr_show, .store_attribute = target_core_dev_attrib_attr_store, }; static struct config_item_type target_core_dev_attrib_cit = { .ct_item_ops = &target_core_dev_attrib_ops, .ct_attrs = target_core_dev_attrib_attrs, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_dev_attrib_cit */ /* Start functions for struct config_item_type target_core_dev_wwn_cit */ CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn); #define SE_DEV_WWN_ATTR(_name, _mode) \ static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \ __CONFIGFS_EATTR(_name, _mode, \ target_core_dev_wwn_show_attr_##_name, \ target_core_dev_wwn_store_attr_##_name); #define SE_DEV_WWN_ATTR_RO(_name); \ do { \ static struct target_core_dev_wwn_attribute \ target_core_dev_wwn_##_name = \ __CONFIGFS_EATTR_RO(_name, \ target_core_dev_wwn_show_attr_##_name); \ } while (0); /* * VPD page 0x80 Unit serial */ static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial( struct t10_wwn *t10_wwn, char *page) { struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; struct se_device *dev; dev = se_dev->se_dev_ptr; if (!dev) return -ENODEV; return sprintf(page, "T10 VPD Unit Serial Number: %s\n", &t10_wwn->unit_serial[0]); } static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial( struct t10_wwn *t10_wwn, const char *page, size_t count) { struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev; struct se_device *dev; unsigned char buf[INQUIRY_VPD_SERIAL_LEN]; /* * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial * from the struct scsi_device level firmware, do not allow * VPD Unit Serial to be emulated. * * Note this struct scsi_device could also be emulating VPD * information from its drivers/scsi LLD. But for now we assume * it is doing 'the right thing' wrt a world wide unique * VPD Unit Serial Number that OS dependent multipath can depend on. */ if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) { 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. */ dev = su_dev->se_dev_ptr; if (dev) { if (atomic_read(&dev->dev_export_obj.obj_access_count)) { pr_err("Unable to set VPD Unit Serial while" " active %d $FABRIC_MOD exports exist\n", atomic_read(&dev->dev_export_obj.obj_access_count)); return -EINVAL; } } /* * This currently assumes ASCII encoding for emulated VPD Unit Serial. * * Also, strip any newline added from the userspace * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial */ memset(buf, 0, INQUIRY_VPD_SERIAL_LEN); snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page); snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN, "%s", strstrip(buf)); su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL; pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:" " %s\n", su_dev->t10_wwn.unit_serial); return count; } SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR); /* * VPD page 0x83 Protocol Identifier */ static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier( struct t10_wwn *t10_wwn, char *page) { struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; struct se_device *dev; struct t10_vpd *vpd; unsigned char buf[VPD_TMP_BUF_SIZE]; ssize_t len = 0; dev = se_dev->se_dev_ptr; if (!dev) return -ENODEV; memset(buf, 0, VPD_TMP_BUF_SIZE); spin_lock(&t10_wwn->t10_vpd_lock); list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { if (!vpd->protocol_identifier_set) continue; transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE); if (len + strlen(buf) >= PAGE_SIZE) break; len += sprintf(page+len, "%s", buf); } spin_unlock(&t10_wwn->t10_vpd_lock); return len; } static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier( struct t10_wwn *t10_wwn, const char *page, size_t count) { return -ENOSYS; } SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR); /* * Generic wrapper for dumping VPD identifiers by association. */ #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \ static ssize_t target_core_dev_wwn_show_attr_##_name( \ struct t10_wwn *t10_wwn, \ char *page) \ { \ struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \ struct se_device *dev; \ struct t10_vpd *vpd; \ unsigned char buf[VPD_TMP_BUF_SIZE]; \ ssize_t len = 0; \ \ dev = se_dev->se_dev_ptr; \ if (!dev) \ return -ENODEV; \ \ spin_lock(&t10_wwn->t10_vpd_lock); \ list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \ if (vpd->association != _assoc) \ continue; \ \ memset(buf, 0, VPD_TMP_BUF_SIZE); \ transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \ if (len + strlen(buf) >= PAGE_SIZE) \ break; \ len += sprintf(page+len, "%s", buf); \ \ memset(buf, 0, VPD_TMP_BUF_SIZE); \ transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \ if (len + strlen(buf) >= PAGE_SIZE) \ break; \ len += sprintf(page+len, "%s", buf); \ \ memset(buf, 0, VPD_TMP_BUF_SIZE); \ transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \ if (len + strlen(buf) >= PAGE_SIZE) \ break; \ len += sprintf(page+len, "%s", buf); \ } \ spin_unlock(&t10_wwn->t10_vpd_lock); \ \ return len; \ } /* * VPD page 0x83 Assoication: Logical Unit */ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00); static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit( struct t10_wwn *t10_wwn, const char *page, size_t count) { return -ENOSYS; } SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR); /* * VPD page 0x83 Association: Target Port */ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10); static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port( struct t10_wwn *t10_wwn, const char *page, size_t count) { return -ENOSYS; } SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR); /* * VPD page 0x83 Association: SCSI Target Device */ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device( struct t10_wwn *t10_wwn, const char *page, size_t count) { return -ENOSYS; } SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR); CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group); static struct configfs_attribute *target_core_dev_wwn_attrs[] = { &target_core_dev_wwn_vpd_unit_serial.attr, &target_core_dev_wwn_vpd_protocol_identifier.attr, &target_core_dev_wwn_vpd_assoc_logical_unit.attr, &target_core_dev_wwn_vpd_assoc_target_port.attr, &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr, NULL, }; static struct configfs_item_operations target_core_dev_wwn_ops = { .show_attribute = target_core_dev_wwn_attr_show, .store_attribute = target_core_dev_wwn_attr_store, }; static struct config_item_type target_core_dev_wwn_cit = { .ct_item_ops = &target_core_dev_wwn_ops, .ct_attrs = target_core_dev_wwn_attrs, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_dev_wwn_cit */ /* Start functions for struct config_item_type target_core_dev_pr_cit */ CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev); #define SE_DEV_PR_ATTR(_name, _mode) \ static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ __CONFIGFS_EATTR(_name, _mode, \ target_core_dev_pr_show_attr_##_name, \ target_core_dev_pr_store_attr_##_name); #define SE_DEV_PR_ATTR_RO(_name); \ static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \ __CONFIGFS_EATTR_RO(_name, \ target_core_dev_pr_show_attr_##_name); /* * res_holder */ static ssize_t target_core_dev_pr_show_spc3_res( struct se_device *dev, char *page, ssize_t *len) { struct se_node_acl *se_nacl; struct t10_pr_registration *pr_reg; char i_buf[PR_REG_ISID_ID_LEN]; int prf_isid; memset(i_buf, 0, PR_REG_ISID_ID_LEN); spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; if (!pr_reg) { *len += sprintf(page + *len, "No SPC-3 Reservation holder\n"); spin_unlock(&dev->dev_reservation_lock); return *len; } se_nacl = pr_reg->pr_reg_nacl; prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], PR_REG_ISID_ID_LEN); *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n", se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : ""); spin_unlock(&dev->dev_reservation_lock); return *len; } static ssize_t target_core_dev_pr_show_spc2_res( struct se_device *dev, char *page, ssize_t *len) { struct se_node_acl *se_nacl; spin_lock(&dev->dev_reservation_lock); se_nacl = dev->dev_reserved_node_acl; if (!se_nacl) { *len += sprintf(page + *len, "No SPC-2 Reservation holder\n"); spin_unlock(&dev->dev_reservation_lock); return *len; } *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n", se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(), se_nacl->initiatorname); spin_unlock(&dev->dev_reservation_lock); return *len; } static ssize_t target_core_dev_pr_show_attr_res_holder( struct se_subsystem_dev *su_dev, char *page) { ssize_t len = 0; if (!su_dev->se_dev_ptr) return -ENODEV; switch (su_dev->t10_pr.res_type) { case SPC3_PERSISTENT_RESERVATIONS: target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr, page, &len); break; case SPC2_RESERVATIONS: target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr, page, &len); break; case SPC_PASSTHROUGH: len += sprintf(page+len, "Passthrough\n"); break; default: len += sprintf(page+len, "Unknown\n"); break; } return len; } SE_DEV_PR_ATTR_RO(res_holder); /* * res_pr_all_tgt_pts */ static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts( struct se_subsystem_dev *su_dev, char *page) { struct se_device *dev; struct t10_pr_registration *pr_reg; ssize_t len = 0; dev = su_dev->se_dev_ptr; if (!dev) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return len; spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; if (!pr_reg) { len = sprintf(page, "No SPC-3 Reservation holder\n"); spin_unlock(&dev->dev_reservation_lock); return len; } /* * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3 * Basic PERSISTENT RESERVER OUT parameter list, page 290 */ if (pr_reg->pr_reg_all_tg_pt) len = sprintf(page, "SPC-3 Reservation: All Target" " Ports registration\n"); else len = sprintf(page, "SPC-3 Reservation: Single" " Target Port registration\n"); spin_unlock(&dev->dev_reservation_lock); return len; } SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts); /* * res_pr_generation */ static ssize_t target_core_dev_pr_show_attr_res_pr_generation( struct se_subsystem_dev *su_dev, char *page) { if (!su_dev->se_dev_ptr) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return 0; return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation); } SE_DEV_PR_ATTR_RO(res_pr_generation); /* * res_pr_holder_tg_port */ static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port( struct se_subsystem_dev *su_dev, char *page) { struct se_device *dev; struct se_node_acl *se_nacl; struct se_lun *lun; struct se_portal_group *se_tpg; struct t10_pr_registration *pr_reg; struct target_core_fabric_ops *tfo; ssize_t len = 0; dev = su_dev->se_dev_ptr; if (!dev) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return len; spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; if (!pr_reg) { len = sprintf(page, "No SPC-3 Reservation holder\n"); spin_unlock(&dev->dev_reservation_lock); return len; } se_nacl = pr_reg->pr_reg_nacl; se_tpg = se_nacl->se_tpg; lun = pr_reg->pr_reg_tg_pt_lun; tfo = se_tpg->se_tpg_tfo; len += sprintf(page+len, "SPC-3 Reservation: %s" " Target Node Endpoint: %s\n", tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg)); len += sprintf(page+len, "SPC-3 Reservation: Relative Port" " Identifer Tag: %hu %s Portal Group Tag: %hu" " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi, tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg), tfo->get_fabric_name(), lun->unpacked_lun); spin_unlock(&dev->dev_reservation_lock); return len; } SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port); /* * res_pr_registered_i_pts */ static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts( struct se_subsystem_dev *su_dev, char *page) { struct target_core_fabric_ops *tfo; struct t10_pr_registration *pr_reg; unsigned char buf[384]; char i_buf[PR_REG_ISID_ID_LEN]; ssize_t len = 0; int reg_count = 0, prf_isid; if (!su_dev->se_dev_ptr) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return len; len += sprintf(page+len, "SPC-3 PR Registrations:\n"); spin_lock(&su_dev->t10_pr.registration_lock); list_for_each_entry(pr_reg, &su_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; prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0], PR_REG_ISID_ID_LEN); sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "", pr_reg->pr_res_key, pr_reg->pr_res_generation); if (len + strlen(buf) >= PAGE_SIZE) break; len += sprintf(page+len, "%s", buf); reg_count++; } spin_unlock(&su_dev->t10_pr.registration_lock); if (!reg_count) len += sprintf(page+len, "None\n"); return len; } SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts); /* * res_pr_type */ static ssize_t target_core_dev_pr_show_attr_res_pr_type( struct se_subsystem_dev *su_dev, char *page) { struct se_device *dev; struct t10_pr_registration *pr_reg; ssize_t len = 0; dev = su_dev->se_dev_ptr; if (!dev) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return len; spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; if (!pr_reg) { len = sprintf(page, "No SPC-3 Reservation holder\n"); spin_unlock(&dev->dev_reservation_lock); return len; } len = sprintf(page, "SPC-3 Reservation Type: %s\n", core_scsi3_pr_dump_type(pr_reg->pr_res_type)); spin_unlock(&dev->dev_reservation_lock); return len; } SE_DEV_PR_ATTR_RO(res_pr_type); /* * res_type */ static ssize_t target_core_dev_pr_show_attr_res_type( struct se_subsystem_dev *su_dev, char *page) { ssize_t len = 0; if (!su_dev->se_dev_ptr) return -ENODEV; switch (su_dev->t10_pr.res_type) { case SPC3_PERSISTENT_RESERVATIONS: len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n"); break; case SPC2_RESERVATIONS: len = sprintf(page, "SPC2_RESERVATIONS\n"); break; case SPC_PASSTHROUGH: len = sprintf(page, "SPC_PASSTHROUGH\n"); break; default: len = sprintf(page, "UNKNOWN\n"); break; } return len; } SE_DEV_PR_ATTR_RO(res_type); /* * res_aptpl_active */ static ssize_t target_core_dev_pr_show_attr_res_aptpl_active( struct se_subsystem_dev *su_dev, char *page) { if (!su_dev->se_dev_ptr) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return 0; return sprintf(page, "APTPL Bit Status: %s\n", (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled"); } SE_DEV_PR_ATTR_RO(res_aptpl_active); /* * res_aptpl_metadata */ static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata( struct se_subsystem_dev *su_dev, char *page) { if (!su_dev->se_dev_ptr) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return 0; return sprintf(page, "Ready to process PR APTPL metadata..\n"); } enum { Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid, Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope, Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric, Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err }; static match_table_t tokens = { {Opt_initiator_fabric, "initiator_fabric=%s"}, {Opt_initiator_node, "initiator_node=%s"}, {Opt_initiator_sid, "initiator_sid=%s"}, {Opt_sa_res_key, "sa_res_key=%s"}, {Opt_res_holder, "res_holder=%d"}, {Opt_res_type, "res_type=%d"}, {Opt_res_scope, "res_scope=%d"}, {Opt_res_all_tg_pt, "res_all_tg_pt=%d"}, {Opt_mapped_lun, "mapped_lun=%d"}, {Opt_target_fabric, "target_fabric=%s"}, {Opt_target_node, "target_node=%s"}, {Opt_tpgt, "tpgt=%d"}, {Opt_port_rtpi, "port_rtpi=%d"}, {Opt_target_lun, "target_lun=%d"}, {Opt_err, NULL} }; static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata( struct se_subsystem_dev *su_dev, const char *page, size_t count) { struct se_device *dev; unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL; unsigned char *t_fabric = NULL, *t_port = NULL; char *orig, *ptr, *arg_p, *opts; substring_t args[MAX_OPT_ARGS]; unsigned long long tmp_ll; u64 sa_res_key = 0; u32 mapped_lun = 0, target_lun = 0; int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token; u16 port_rpti = 0, tpgt = 0; u8 type = 0, scope; dev = su_dev->se_dev_ptr; if (!dev) return -ENODEV; if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS) return 0; if (atomic_read(&dev->dev_export_obj.obj_access_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, ",")) != NULL) { if (!*ptr) continue; token = match_token(ptr, tokens, args); switch (token) { case Opt_initiator_fabric: i_fabric = match_strdup(&args[0]); if (!i_fabric) { ret = -ENOMEM; goto out; } break; case Opt_initiator_node: i_port = match_strdup(&args[0]); 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[0]); 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: arg_p = match_strdup(&args[0]); if (!arg_p) { ret = -ENOMEM; goto out; } ret = strict_strtoull(arg_p, 0, &tmp_ll); if (ret < 0) { pr_err("strict_strtoull() failed for" " sa_res_key=\n"); goto out; } sa_res_key = (u64)tmp_ll; break; /* * PR APTPL Metadata for Reservation */ case Opt_res_holder: match_int(args, &arg); res_holder = arg; break; case Opt_res_type: match_int(args, &arg); type = (u8)arg; break; case Opt_res_scope: match_int(args, &arg); scope = (u8)arg; break; case Opt_res_all_tg_pt: match_int(args, &arg); all_tg_pt = (int)arg; break; case Opt_mapped_lun: match_int(args, &arg); mapped_lun = (u32)arg; break; /* * PR APTPL Metadata for Target Port */ case Opt_target_fabric: t_fabric = match_strdup(&args[0]); if (!t_fabric) { ret = -ENOMEM; goto out; } break; case Opt_target_node: t_port = match_strdup(&args[0]); 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: match_int(args, &arg); tpgt = (u16)arg; break; case Opt_port_rtpi: match_int(args, &arg); port_rpti = (u16)arg; break; case Opt_target_lun: match_int(args, &arg); target_lun = (u32)arg; break; default: break; } } if (!i_port || !t_port || !sa_res_key) { 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(&su_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; } SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR); CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group); static struct configfs_attribute *target_core_dev_pr_attrs[] = { &target_core_dev_pr_res_holder.attr, &target_core_dev_pr_res_pr_all_tgt_pts.attr, &target_core_dev_pr_res_pr_generation.attr, &target_core_dev_pr_res_pr_holder_tg_port.attr, &target_core_dev_pr_res_pr_registered_i_pts.attr, &target_core_dev_pr_res_pr_type.attr, &target_core_dev_pr_res_type.attr, &target_core_dev_pr_res_aptpl_active.attr, &target_core_dev_pr_res_aptpl_metadata.attr, NULL, }; static struct configfs_item_operations target_core_dev_pr_ops = { .show_attribute = target_core_dev_pr_attr_show, .store_attribute = target_core_dev_pr_attr_store, }; static struct config_item_type target_core_dev_pr_cit = { .ct_item_ops = &target_core_dev_pr_ops, .ct_attrs = target_core_dev_pr_attrs, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_dev_pr_cit */ /* Start functions for struct config_item_type target_core_dev_cit */ static ssize_t target_core_show_dev_info(void *p, char *page) { struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; struct se_hba *hba = se_dev->se_dev_hba; struct se_subsystem_api *t = hba->transport; int bl = 0; ssize_t read_bytes = 0; if (!se_dev->se_dev_ptr) return -ENODEV; transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl); read_bytes += bl; read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes); return read_bytes; } static struct target_core_configfs_attribute target_core_attr_dev_info = { .attr = { .ca_owner = THIS_MODULE, .ca_name = "info", .ca_mode = S_IRUGO }, .show = target_core_show_dev_info, .store = NULL, }; static ssize_t target_core_store_dev_control( void *p, const char *page, size_t count) { struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; struct se_hba *hba = se_dev->se_dev_hba; struct se_subsystem_api *t = hba->transport; if (!se_dev->se_dev_su_ptr) { pr_err("Unable to locate struct se_subsystem_dev>se" "_dev_su_ptr\n"); return -EINVAL; } return t->set_configfs_dev_params(hba, se_dev, page, count); } static struct target_core_configfs_attribute target_core_attr_dev_control = { .attr = { .ca_owner = THIS_MODULE, .ca_name = "control", .ca_mode = S_IWUSR }, .show = NULL, .store = target_core_store_dev_control, }; static ssize_t target_core_show_dev_alias(void *p, char *page) { struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; if (!(se_dev->su_dev_flags & SDF_USING_ALIAS)) return 0; return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias); } static ssize_t target_core_store_dev_alias( void *p, const char *page, size_t count) { struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; struct se_hba *hba = se_dev->se_dev_hba; ssize_t read_bytes; if (count > (SE_DEV_ALIAS_LEN-1)) { pr_err("alias count: %d exceeds" " SE_DEV_ALIAS_LEN-1: %u\n", (int)count, SE_DEV_ALIAS_LEN-1); return -EINVAL; } se_dev->su_dev_flags |= SDF_USING_ALIAS; read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page); pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n", config_item_name(&hba->hba_group.cg_item), config_item_name(&se_dev->se_dev_group.cg_item), se_dev->se_dev_alias); return read_bytes; } static struct target_core_configfs_attribute target_core_attr_dev_alias = { .attr = { .ca_owner = THIS_MODULE, .ca_name = "alias", .ca_mode = S_IRUGO | S_IWUSR }, .show = target_core_show_dev_alias, .store = target_core_store_dev_alias, }; static ssize_t target_core_show_dev_udev_path(void *p, char *page) { struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH)) return 0; return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path); } static ssize_t target_core_store_dev_udev_path( void *p, const char *page, size_t count) { struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; struct se_hba *hba = se_dev->se_dev_hba; ssize_t read_bytes; if (count > (SE_UDEV_PATH_LEN-1)) { pr_err("udev_path count: %d exceeds" " SE_UDEV_PATH_LEN-1: %u\n", (int)count, SE_UDEV_PATH_LEN-1); return -EINVAL; } se_dev->su_dev_flags |= SDF_USING_UDEV_PATH; read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN, "%s", page); pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n", config_item_name(&hba->hba_group.cg_item), config_item_name(&se_dev->se_dev_group.cg_item), se_dev->se_dev_udev_path); return read_bytes; } static struct target_core_configfs_attribute target_core_attr_dev_udev_path = { .attr = { .ca_owner = THIS_MODULE, .ca_name = "udev_path", .ca_mode = S_IRUGO | S_IWUSR }, .show = target_core_show_dev_udev_path, .store = target_core_store_dev_udev_path, }; static ssize_t target_core_store_dev_enable( void *p, const char *page, size_t count) { struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p; struct se_device *dev; struct se_hba *hba = se_dev->se_dev_hba; struct se_subsystem_api *t = hba->transport; char *ptr; ptr = strstr(page, "1"); if (!ptr) { pr_err("For dev_enable ops, only valid value" " is \"1\"\n"); return -EINVAL; } if (se_dev->se_dev_ptr) { pr_err("se_dev->se_dev_ptr already set for storage" " object\n"); return -EEXIST; } if (t->check_configfs_dev_params(hba, se_dev) < 0) return -EINVAL; dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr); if (IS_ERR(dev)) return PTR_ERR(dev); else if (!dev) return -EINVAL; se_dev->se_dev_ptr = dev; pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:" " %p\n", se_dev->se_dev_ptr); return count; } static struct target_core_configfs_attribute target_core_attr_dev_enable = { .attr = { .ca_owner = THIS_MODULE, .ca_name = "enable", .ca_mode = S_IWUSR }, .show = NULL, .store = target_core_store_dev_enable, }; static ssize_t target_core_show_alua_lu_gp(void *p, char *page) { struct se_device *dev; struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; struct config_item *lu_ci; struct t10_alua_lu_gp *lu_gp; struct t10_alua_lu_gp_member *lu_gp_mem; ssize_t len = 0; dev = su_dev->se_dev_ptr; if (!dev) return -ENODEV; if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) return len; lu_gp_mem = dev->dev_alua_lu_gp_mem; if (!lu_gp_mem) { pr_err("NULL struct se_device->dev_alua_lu_gp_mem" " pointer\n"); return -EINVAL; } spin_lock(&lu_gp_mem->lu_gp_mem_lock); lu_gp = lu_gp_mem->lu_gp; if (lu_gp) { lu_ci = &lu_gp->lu_gp_group.cg_item; len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n", config_item_name(lu_ci), lu_gp->lu_gp_id); } spin_unlock(&lu_gp_mem->lu_gp_mem_lock); return len; } static ssize_t target_core_store_alua_lu_gp( void *p, const char *page, size_t count) { struct se_device *dev; struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p; struct se_hba *hba = su_dev->se_dev_hba; struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL; struct t10_alua_lu_gp_member *lu_gp_mem; unsigned char buf[LU_GROUP_NAME_BUF]; int move = 0; dev = su_dev->se_dev_ptr; if (!dev) return -ENODEV; if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) { pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n", config_item_name(&hba->hba_group.cg_item), config_item_name(&su_dev->se_dev_group.cg_item)); return -EINVAL; } if (count > LU_GROUP_NAME_BUF) { pr_err("ALUA LU Group Alias too large!\n"); return -EINVAL; } memset(buf, 0, LU_GROUP_NAME_BUF); memcpy(buf, page, count); /* * Any ALUA logical unit alias besides "NULL" means we will be * making a new group association. */ if (strcmp(strstrip(buf), "NULL")) { /* * core_alua_get_lu_gp_by_name() will increment reference to * struct t10_alua_lu_gp. This reference is released with * core_alua_get_lu_gp_by_name below(). */ lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf)); if (!lu_gp_new) return -ENODEV; } lu_gp_mem = dev->dev_alua_lu_gp_mem; if (!lu_gp_mem) { if (lu_gp_new) core_alua_put_lu_gp_from_name(lu_gp_new); pr_err("NULL struct se_device->dev_alua_lu_gp_mem" " pointer\n"); return -EINVAL; } spin_lock(&lu_gp_mem->lu_gp_mem_lock); lu_gp = lu_gp_mem->lu_gp; if (lu_gp) { /* * Clearing an existing lu_gp association, and replacing * with NULL */ if (!lu_gp_new) { 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(&su_dev->se_dev_group.cg_item), config_item_name(&lu_gp->lu_gp_group.cg_item), lu_gp->lu_gp_id); __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); spin_unlock(&lu_gp_mem->lu_gp_mem_lock); return count; } /* * Removing existing association of lu_gp_mem with lu_gp */ __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp); move = 1; } /* * Associate lu_gp_mem with lu_gp_new. */ __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new); spin_unlock(&lu_gp_mem->lu_gp_mem_lock); 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(&su_dev->se_dev_group.cg_item), config_item_name(&lu_gp_new->lu_gp_group.cg_item), lu_gp_new->lu_gp_id); core_alua_put_lu_gp_from_name(lu_gp_new); return count; } static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = { .attr = { .ca_owner = THIS_MODULE, .ca_name = "alua_lu_gp", .ca_mode = S_IRUGO | S_IWUSR }, .show = target_core_show_alua_lu_gp, .store = target_core_store_alua_lu_gp, }; static struct configfs_attribute *lio_core_dev_attrs[] = { &target_core_attr_dev_info.attr, &target_core_attr_dev_control.attr, &target_core_attr_dev_alias.attr, &target_core_attr_dev_udev_path.attr, &target_core_attr_dev_enable.attr, &target_core_attr_dev_alua_lu_gp.attr, NULL, }; static void target_core_dev_release(struct config_item *item) { struct se_subsystem_dev *se_dev = container_of(to_config_group(item), struct se_subsystem_dev, se_dev_group); struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); struct se_subsystem_api *t = hba->transport; struct config_group *dev_cg = &se_dev->se_dev_group; kfree(dev_cg->default_groups); /* * This pointer will set when the storage is enabled with: *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable` */ if (se_dev->se_dev_ptr) { pr_debug("Target_Core_ConfigFS: Calling se_free_" "virtual_device() for se_dev_ptr: %p\n", se_dev->se_dev_ptr); se_free_virtual_device(se_dev->se_dev_ptr, hba); } else { /* * Release struct se_subsystem_dev->se_dev_su_ptr.. */ pr_debug("Target_Core_ConfigFS: Calling t->free_" "device() for se_dev_su_ptr: %p\n", se_dev->se_dev_su_ptr); t->free_device(se_dev->se_dev_su_ptr); } pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem" "_dev_t: %p\n", se_dev); kfree(se_dev); } static ssize_t target_core_dev_show(struct config_item *item, struct configfs_attribute *attr, char *page) { struct se_subsystem_dev *se_dev = container_of( to_config_group(item), struct se_subsystem_dev, se_dev_group); struct target_core_configfs_attribute *tc_attr = container_of( attr, struct target_core_configfs_attribute, attr); if (!tc_attr->show) return -EINVAL; return tc_attr->show(se_dev, page); } static ssize_t target_core_dev_store(struct config_item *item, struct configfs_attribute *attr, const char *page, size_t count) { struct se_subsystem_dev *se_dev = container_of( to_config_group(item), struct se_subsystem_dev, se_dev_group); struct target_core_configfs_attribute *tc_attr = container_of( attr, struct target_core_configfs_attribute, attr); if (!tc_attr->store) return -EINVAL; return tc_attr->store(se_dev, page, count); } static struct configfs_item_operations target_core_dev_item_ops = { .release = target_core_dev_release, .show_attribute = target_core_dev_show, .store_attribute = target_core_dev_store, }; static struct config_item_type target_core_dev_cit = { .ct_item_ops = &target_core_dev_item_ops, .ct_attrs = lio_core_dev_attrs, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_dev_cit */ /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */ CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp); #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \ static struct target_core_alua_lu_gp_attribute \ target_core_alua_lu_gp_##_name = \ __CONFIGFS_EATTR(_name, _mode, \ target_core_alua_lu_gp_show_attr_##_name, \ target_core_alua_lu_gp_store_attr_##_name); #define SE_DEV_ALUA_LU_ATTR_RO(_name) \ static struct target_core_alua_lu_gp_attribute \ target_core_alua_lu_gp_##_name = \ __CONFIGFS_EATTR_RO(_name, \ target_core_alua_lu_gp_show_attr_##_name); /* * lu_gp_id */ static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id( struct t10_alua_lu_gp *lu_gp, char *page) { if (!lu_gp->lu_gp_valid_id) return 0; return sprintf(page, "%hu\n", lu_gp->lu_gp_id); } static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id( struct t10_alua_lu_gp *lu_gp, const char *page, size_t count) { struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group; unsigned long lu_gp_id; int ret; ret = strict_strtoul(page, 0, &lu_gp_id); if (ret < 0) { pr_err("strict_strtoul() returned %d for" " lu_gp_id\n", ret); return -EINVAL; } 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; } SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR); /* * members */ static ssize_t target_core_alua_lu_gp_show_attr_members( struct t10_alua_lu_gp *lu_gp, char *page) { struct se_device *dev; struct se_hba *hba; struct se_subsystem_dev *su_dev; struct t10_alua_lu_gp_member *lu_gp_mem; ssize_t len = 0, cur_len; unsigned char buf[LU_GROUP_NAME_BUF]; memset(buf, 0, LU_GROUP_NAME_BUF); spin_lock(&lu_gp->lu_gp_lock); list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) { dev = lu_gp_mem->lu_gp_mem_dev; su_dev = dev->se_sub_dev; hba = su_dev->se_dev_hba; cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n", config_item_name(&hba->hba_group.cg_item), config_item_name(&su_dev->se_dev_group.cg_item)); cur_len++; /* Extra byte for NULL terminator */ if ((cur_len + len) > PAGE_SIZE) { 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; } SE_DEV_ALUA_LU_ATTR_RO(members); CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group); static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = { &target_core_alua_lu_gp_lu_gp_id.attr, &target_core_alua_lu_gp_members.attr, NULL, }; static void target_core_alua_lu_gp_release(struct config_item *item) { struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item), struct t10_alua_lu_gp, lu_gp_group); core_alua_free_lu_gp(lu_gp); } static struct configfs_item_operations target_core_alua_lu_gp_ops = { .release = target_core_alua_lu_gp_release, .show_attribute = target_core_alua_lu_gp_attr_show, .store_attribute = target_core_alua_lu_gp_attr_store, }; static struct config_item_type target_core_alua_lu_gp_cit = { .ct_item_ops = &target_core_alua_lu_gp_ops, .ct_attrs = target_core_alua_lu_gp_attrs, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_alua_lu_gp_cit */ /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */ static struct config_group *target_core_alua_create_lu_gp( struct config_group *group, const char *name) { struct t10_alua_lu_gp *lu_gp; struct config_group *alua_lu_gp_cg = NULL; struct config_item *alua_lu_gp_ci = NULL; lu_gp = core_alua_allocate_lu_gp(name, 0); if (IS_ERR(lu_gp)) return NULL; alua_lu_gp_cg = &lu_gp->lu_gp_group; alua_lu_gp_ci = &alua_lu_gp_cg->cg_item; config_group_init_type_name(alua_lu_gp_cg, name, &target_core_alua_lu_gp_cit); 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 struct config_item_type target_core_alua_lu_gps_cit = { .ct_item_ops = NULL, .ct_group_ops = &target_core_alua_lu_gps_group_ops, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_alua_lu_gps_cit */ /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp); #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \ static struct target_core_alua_tg_pt_gp_attribute \ target_core_alua_tg_pt_gp_##_name = \ __CONFIGFS_EATTR(_name, _mode, \ target_core_alua_tg_pt_gp_show_attr_##_name, \ target_core_alua_tg_pt_gp_store_attr_##_name); #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \ static struct target_core_alua_tg_pt_gp_attribute \ target_core_alua_tg_pt_gp_##_name = \ __CONFIGFS_EATTR_RO(_name, \ target_core_alua_tg_pt_gp_show_attr_##_name); /* * alua_access_state */ static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { return sprintf(page, "%d\n", atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state)); } static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev; unsigned long tmp; int new_state, ret; if (!tg_pt_gp->tg_pt_gp_valid_id) { pr_err("Unable to do implict ALUA on non valid" " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); return -EINVAL; } ret = strict_strtoul(page, 0, &tmp); if (ret < 0) { pr_err("Unable to extract new ALUA access state from" " %s\n", page); return -EINVAL; } new_state = (int)tmp; if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) { pr_err("Unable to process implict configfs ALUA" " transition while TPGS_IMPLICT_ALUA is diabled\n"); return -EINVAL; } ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr, NULL, NULL, new_state, 0); return (!ret) ? count : -EINVAL; } SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR); /* * alua_access_status */ static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { return sprintf(page, "%s\n", core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status)); } static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { unsigned long tmp; int new_status, ret; if (!tg_pt_gp->tg_pt_gp_valid_id) { pr_err("Unable to do set ALUA access status on non" " valid tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id); return -EINVAL; } ret = strict_strtoul(page, 0, &tmp); if (ret < 0) { pr_err("Unable to extract new ALUA access status" " from %s\n", page); return -EINVAL; } new_status = (int)tmp; if ((new_status != ALUA_STATUS_NONE) && (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) && (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) { 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; } SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR); /* * alua_access_type */ static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { return core_alua_show_access_type(tg_pt_gp, page); } static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { return core_alua_store_access_type(tg_pt_gp, page, count); } SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR); /* * alua_write_metadata */ static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata); } static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { unsigned long tmp; int ret; ret = strict_strtoul(page, 0, &tmp); if (ret < 0) { pr_err("Unable to extract alua_write_metadata\n"); return -EINVAL; } 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; } SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR); /* * nonop_delay_msecs */ static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { return core_alua_show_nonop_delay_msecs(tg_pt_gp, page); } static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count); } SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR); /* * trans_delay_msecs */ static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { return core_alua_show_trans_delay_msecs(tg_pt_gp, page); } static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count); } SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR); /* * preferred */ static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { return core_alua_show_preferred_bit(tg_pt_gp, page); } static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { return core_alua_store_preferred_bit(tg_pt_gp, page, count); } SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR); /* * tg_pt_gp_id */ static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { if (!tg_pt_gp->tg_pt_gp_valid_id) return 0; return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id); } static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id( struct t10_alua_tg_pt_gp *tg_pt_gp, const char *page, size_t count) { struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; unsigned long tg_pt_gp_id; int ret; ret = strict_strtoul(page, 0, &tg_pt_gp_id); if (ret < 0) { pr_err("strict_strtoul() returned %d for" " tg_pt_gp_id\n", ret); return -EINVAL; } 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; } SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR); /* * members */ static ssize_t target_core_alua_tg_pt_gp_show_attr_members( struct t10_alua_tg_pt_gp *tg_pt_gp, char *page) { struct se_port *port; struct se_portal_group *tpg; struct se_lun *lun; struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; ssize_t len = 0, cur_len; unsigned char buf[TG_PT_GROUP_NAME_BUF]; memset(buf, 0, TG_PT_GROUP_NAME_BUF); spin_lock(&tg_pt_gp->tg_pt_gp_lock); list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list, tg_pt_gp_mem_list) { port = tg_pt_gp_mem->tg_pt; tpg = port->sep_tpg; lun = port->sep_lun; cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu" "/%s\n", tpg->se_tpg_tfo->get_fabric_name(), tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpg->se_tpg_tfo->tpg_get_tag(tpg), config_item_name(&lun->lun_group.cg_item)); cur_len++; /* Extra byte for NULL terminator */ if ((cur_len + len) > PAGE_SIZE) { pr_warn("Ran out of lu_gp_show_attr" "_members buffer\n"); break; } memcpy(page+len, buf, cur_len); len += cur_len; } spin_unlock(&tg_pt_gp->tg_pt_gp_lock); return len; } SE_DEV_ALUA_TG_PT_ATTR_RO(members); CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp, tg_pt_gp_group); static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = { &target_core_alua_tg_pt_gp_alua_access_state.attr, &target_core_alua_tg_pt_gp_alua_access_status.attr, &target_core_alua_tg_pt_gp_alua_access_type.attr, &target_core_alua_tg_pt_gp_alua_write_metadata.attr, &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr, &target_core_alua_tg_pt_gp_trans_delay_msecs.attr, &target_core_alua_tg_pt_gp_preferred.attr, &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr, &target_core_alua_tg_pt_gp_members.attr, NULL, }; static void target_core_alua_tg_pt_gp_release(struct config_item *item) { struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item), struct t10_alua_tg_pt_gp, tg_pt_gp_group); core_alua_free_tg_pt_gp(tg_pt_gp); } static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = { .release = target_core_alua_tg_pt_gp_release, .show_attribute = target_core_alua_tg_pt_gp_attr_show, .store_attribute = target_core_alua_tg_pt_gp_attr_store, }; static struct config_item_type target_core_alua_tg_pt_gp_cit = { .ct_item_ops = &target_core_alua_tg_pt_gp_ops, .ct_attrs = target_core_alua_tg_pt_gp_attrs, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */ /* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ static struct config_group *target_core_alua_create_tg_pt_gp( struct config_group *group, const char *name) { struct t10_alua *alua = container_of(group, struct t10_alua, alua_tg_pt_gps_group); struct t10_alua_tg_pt_gp *tg_pt_gp; struct se_subsystem_dev *su_dev = alua->t10_sub_dev; struct config_group *alua_tg_pt_gp_cg = NULL; struct config_item *alua_tg_pt_gp_ci = NULL; tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0); if (!tg_pt_gp) return NULL; alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group; alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item; config_group_init_type_name(alua_tg_pt_gp_cg, name, &target_core_alua_tg_pt_gp_cit); 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, }; static struct config_item_type target_core_alua_tg_pt_gps_cit = { .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */ /* Start functions for struct config_item_type target_core_alua_cit */ /* * target_core_alua_cit is a ConfigFS group that lives under * /sys/kernel/config/target/core/alua. There are default groups * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to * target_core_alua_cit in target_core_init_configfs() below. */ static struct config_item_type target_core_alua_cit = { .ct_item_ops = NULL, .ct_attrs = NULL, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_alua_cit */ /* Start functions for struct config_item_type target_core_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, }; static struct config_item_type target_core_stat_cit = { .ct_group_ops = &target_core_stat_group_ops, .ct_owner = THIS_MODULE, }; /* End functions for struct config_item_type target_core_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 se_subsystem_dev *se_dev; struct se_subsystem_api *t; struct config_item *hba_ci = &group->cg_item; struct se_hba *hba = item_to_hba(hba_ci); struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL; struct config_group *dev_stat_grp = NULL; int errno = -ENOMEM, ret; ret = mutex_lock_interruptible(&hba->hba_access_mutex); if (ret) return ERR_PTR(ret); /* * Locate the struct se_subsystem_api from parent's struct se_hba. */ t = hba->transport; se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL); if (!se_dev) { pr_err("Unable to allocate memory for" " struct se_subsystem_dev\n"); goto unlock; } INIT_LIST_HEAD(&se_dev->se_dev_node); INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list); spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock); INIT_LIST_HEAD(&se_dev->t10_pr.registration_list); INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list); spin_lock_init(&se_dev->t10_pr.registration_lock); spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock); INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list); spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock); spin_lock_init(&se_dev->se_dev_lock); se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN; se_dev->t10_wwn.t10_sub_dev = se_dev; se_dev->t10_alua.t10_sub_dev = se_dev; se_dev->se_dev_attrib.da_sub_dev = se_dev; se_dev->se_dev_hba = hba; dev_cg = &se_dev->se_dev_group; dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7, GFP_KERNEL); if (!dev_cg->default_groups) goto out; /* * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr * for ->allocate_virtdevice() * * se_dev->se_dev_ptr will be set after ->create_virtdev() * has been called successfully in the next level up in the * configfs tree for device object's struct config_group. */ se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name); if (!se_dev->se_dev_su_ptr) { pr_err("Unable to locate subsystem dependent pointer" " from allocate_virtdevice()\n"); goto out; } spin_lock(&se_device_lock); list_add_tail(&se_dev->se_dev_node, &se_dev_list); spin_unlock(&se_device_lock); config_group_init_type_name(&se_dev->se_dev_group, name, &target_core_dev_cit); config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib", &target_core_dev_attrib_cit); config_group_init_type_name(&se_dev->se_dev_pr_group, "pr", &target_core_dev_pr_cit); config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn", &target_core_dev_wwn_cit); config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group, "alua", &target_core_alua_tg_pt_gps_cit); config_group_init_type_name(&se_dev->dev_stat_grps.stat_group, "statistics", &target_core_stat_cit); dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group; dev_cg->default_groups[1] = &se_dev->se_dev_pr_group; dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group; dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group; dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group; dev_cg->default_groups[5] = NULL; /* * Add core/$HBA/$DEV/alua/default_tg_pt_gp */ tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1); if (!tg_pt_gp) goto out; tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, GFP_KERNEL); if (!tg_pt_gp_cg->default_groups) { pr_err("Unable to allocate tg_pt_gp_cg->" "default_groups\n"); goto out; } config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group, "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit); tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group; tg_pt_gp_cg->default_groups[1] = NULL; se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp; /* * Add core/$HBA/$DEV/statistics/ default groups */ dev_stat_grp = &se_dev->dev_stat_grps.stat_group; dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4, GFP_KERNEL); if (!dev_stat_grp->default_groups) { pr_err("Unable to allocate dev_stat_grp->default_groups\n"); goto out; } target_stat_setup_dev_default_groups(se_dev); pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:" " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr); mutex_unlock(&hba->hba_access_mutex); return &se_dev->se_dev_group; out: if (se_dev->t10_alua.default_tg_pt_gp) { core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp); se_dev->t10_alua.default_tg_pt_gp = NULL; } if (dev_stat_grp) kfree(dev_stat_grp->default_groups); if (tg_pt_gp_cg) kfree(tg_pt_gp_cg->default_groups); if (dev_cg) kfree(dev_cg->default_groups); if (se_dev->se_dev_su_ptr) t->free_device(se_dev->se_dev_su_ptr); kfree(se_dev); unlock: mutex_unlock(&hba->hba_access_mutex); return ERR_PTR(errno); } static void target_core_drop_subdev( struct config_group *group, struct config_item *item) { struct se_subsystem_dev *se_dev = container_of(to_config_group(item), struct se_subsystem_dev, se_dev_group); struct se_hba *hba; struct se_subsystem_api *t; struct config_item *df_item; struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp; int i; hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item); mutex_lock(&hba->hba_access_mutex); t = hba->transport; spin_lock(&se_device_lock); list_del(&se_dev->se_dev_node); spin_unlock(&se_device_lock); dev_stat_grp = &se_dev->dev_stat_grps.stat_group; for (i = 0; dev_stat_grp->default_groups[i]; i++) { df_item = &dev_stat_grp->default_groups[i]->cg_item; dev_stat_grp->default_groups[i] = NULL; config_item_put(df_item); } kfree(dev_stat_grp->default_groups); tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group; for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) { df_item = &tg_pt_gp_cg->default_groups[i]->cg_item; tg_pt_gp_cg->default_groups[i] = NULL; config_item_put(df_item); } kfree(tg_pt_gp_cg->default_groups); /* * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp * directly from target_core_alua_tg_pt_gp_release(). */ se_dev->t10_alua.default_tg_pt_gp = NULL; dev_cg = &se_dev->se_dev_group; for (i = 0; dev_cg->default_groups[i]; i++) { df_item = &dev_cg->default_groups[i]->cg_item; dev_cg->default_groups[i] = NULL; config_item_put(df_item); } /* * The releasing of se_dev and associated se_dev->se_dev_ptr is done * from target_core_dev_item_ops->release() ->target_core_dev_release(). */ config_item_put(item); mutex_unlock(&hba->hba_access_mutex); } static struct configfs_group_operations target_core_hba_group_ops = { .make_group = target_core_make_subdev, .drop_item = target_core_drop_subdev, }; CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba); #define SE_HBA_ATTR(_name, _mode) \ static struct target_core_hba_attribute \ target_core_hba_##_name = \ __CONFIGFS_EATTR(_name, _mode, \ target_core_hba_show_attr_##_name, \ target_core_hba_store_attr_##_name); #define SE_HBA_ATTR_RO(_name) \ static struct target_core_hba_attribute \ target_core_hba_##_name = \ __CONFIGFS_EATTR_RO(_name, \ target_core_hba_show_attr_##_name); static ssize_t target_core_hba_show_attr_hba_info( struct se_hba *hba, char *page) { return sprintf(page, "HBA Index: %d plugin: %s version: %s\n", hba->hba_id, hba->transport->name, TARGET_CORE_CONFIGFS_VERSION); } SE_HBA_ATTR_RO(hba_info); static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba, char *page) { int hba_mode = 0; if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE) hba_mode = 1; return sprintf(page, "%d\n", hba_mode); } static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba, const char *page, size_t count) { struct se_subsystem_api *transport = hba->transport; unsigned long mode_flag; int ret; if (transport->pmode_enable_hba == NULL) return -EINVAL; ret = strict_strtoul(page, 0, &mode_flag); if (ret < 0) { pr_err("Unable to extract hba mode flag: %d\n", ret); return -EINVAL; } spin_lock(&hba->device_lock); if (!list_empty(&hba->hba_dev_list)) { pr_err("Unable to set hba_mode with active devices\n"); spin_unlock(&hba->device_lock); return -EINVAL; } spin_unlock(&hba->device_lock); ret = transport->pmode_enable_hba(hba, mode_flag); if (ret < 0) return -EINVAL; if (ret > 0) hba->hba_flags |= HBA_FLAGS_PSCSI_MODE; else if (ret == 0) hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE; return count; } SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR); CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group); static void target_core_hba_release(struct config_item *item) { struct se_hba *hba = container_of(to_config_group(item), struct se_hba, hba_group); core_delete_hba(hba); } static struct configfs_attribute *target_core_hba_attrs[] = { &target_core_hba_hba_info.attr, &target_core_hba_hba_mode.attr, NULL, }; static struct configfs_item_operations target_core_hba_item_ops = { .release = target_core_hba_release, .show_attribute = target_core_hba_attr_show, .store_attribute = target_core_hba_attr_store, }; static struct config_item_type target_core_hba_cit = { .ct_item_ops = &target_core_hba_item_ops, .ct_group_ops = &target_core_hba_group_ops, .ct_attrs = target_core_hba_attrs, .ct_owner = THIS_MODULE, }; static struct config_group *target_core_call_addhbatotarget( struct config_group *group, const char *name) { char *se_plugin_str, *str, *str2; struct se_hba *hba; char buf[TARGET_CORE_NAME_MAX_LEN]; unsigned long plugin_dep_id = 0; int ret; memset(buf, 0, TARGET_CORE_NAME_MAX_LEN); if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) { 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 = strict_strtoul(str, 0, &plugin_dep_id); if (ret < 0) { pr_err("strict_strtoul() returned %d for" " plugin_dep_id\n", ret); return ERR_PTR(-EINVAL); } /* * Load up TCM subsystem plugins if they have not already been loaded. */ if (transport_subsystem_check_init() < 0) return ERR_PTR(-EINVAL); hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0); if (IS_ERR(hba)) return ERR_CAST(hba); config_group_init_type_name(&hba->hba_group, name, &target_core_hba_cit); return &hba->hba_group; } static void target_core_call_delhbafromtarget( struct config_group *group, struct config_item *item) { /* * core_delete_hba() is called from target_core_hba_item_ops->release() * -> target_core_hba_release() */ config_item_put(item); } static struct configfs_group_operations target_core_group_ops = { .make_group = target_core_call_addhbatotarget, .drop_item = target_core_call_delhbafromtarget, }; static struct config_item_type target_core_cit = { .ct_item_ops = NULL, .ct_group_ops = &target_core_group_ops, .ct_attrs = NULL, .ct_owner = THIS_MODULE, }; /* Stop functions for struct config_item_type target_core_hba_cit */ static int __init target_core_init_configfs(void) { struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL; struct config_group *lu_gp_cg = NULL; struct configfs_subsystem *subsys; struct t10_alua_lu_gp *lu_gp; int ret; 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); subsys = target_core_subsystem[0]; config_group_init(&subsys->su_group); mutex_init(&subsys->su_mutex); INIT_LIST_HEAD(&g_tf_list); mutex_init(&g_tf_lock); 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. */ target_cg = &subsys->su_group; target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, GFP_KERNEL); if (!target_cg->default_groups) { pr_err("Unable to allocate target_cg->default_groups\n"); goto out_global; } config_group_init_type_name(&target_core_hbagroup, "core", &target_core_cit); target_cg->default_groups[0] = &target_core_hbagroup; target_cg->default_groups[1] = NULL; /* * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/ */ hba_cg = &target_core_hbagroup; hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, GFP_KERNEL); if (!hba_cg->default_groups) { pr_err("Unable to allocate hba_cg->default_groups\n"); goto out_global; } config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit); hba_cg->default_groups[0] = &alua_group; hba_cg->default_groups[1] = NULL; /* * Add ALUA Logical Unit Group and Target Port Group ConfigFS * groups under /sys/kernel/config/target/core/alua/ */ alua_cg = &alua_group; alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, GFP_KERNEL); if (!alua_cg->default_groups) { pr_err("Unable to allocate alua_cg->default_groups\n"); goto out_global; } config_group_init_type_name(&alua_lu_gps_group, "lu_gps", &target_core_alua_lu_gps_cit); alua_cg->default_groups[0] = &alua_lu_gps_group; alua_cg->default_groups[1] = NULL; /* * Add core/alua/lu_gps/default_lu_gp */ lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1); if (IS_ERR(lu_gp)) goto out_global; lu_gp_cg = &alua_lu_gps_group; lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2, GFP_KERNEL); if (!lu_gp_cg->default_groups) { pr_err("Unable to allocate lu_gp_cg->default_groups\n"); goto out_global; } config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp", &target_core_alua_lu_gp_cit); lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group; lu_gp_cg->default_groups[1] = NULL; 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_CONFIGFS_VERSION" on %s/%s" " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine); /* * Register built-in RAMDISK subsystem logic for virtual LUN 0 */ ret = rd_module_init(); if (ret < 0) goto out; if (core_dev_setup_virtual_lun0() < 0) goto out; return 0; out: configfs_unregister_subsystem(subsys); core_dev_release_virtual_lun0(); rd_module_exit(); out_global: if (default_lu_gp) { core_alua_free_lu_gp(default_lu_gp); default_lu_gp = NULL; } if (lu_gp_cg) kfree(lu_gp_cg->default_groups); if (alua_cg) kfree(alua_cg->default_groups); if (hba_cg) kfree(hba_cg->default_groups); kfree(target_cg->default_groups); release_se_kmem_caches(); return ret; } static void __exit target_core_exit_configfs(void) { struct configfs_subsystem *subsys; struct config_group *hba_cg, *alua_cg, *lu_gp_cg; struct config_item *item; int i; subsys = target_core_subsystem[0]; lu_gp_cg = &alua_lu_gps_group; for (i = 0; lu_gp_cg->default_groups[i]; i++) { item = &lu_gp_cg->default_groups[i]->cg_item; lu_gp_cg->default_groups[i] = NULL; config_item_put(item); } kfree(lu_gp_cg->default_groups); lu_gp_cg->default_groups = NULL; alua_cg = &alua_group; for (i = 0; alua_cg->default_groups[i]; i++) { item = &alua_cg->default_groups[i]->cg_item; alua_cg->default_groups[i] = NULL; config_item_put(item); } kfree(alua_cg->default_groups); alua_cg->default_groups = NULL; hba_cg = &target_core_hbagroup; for (i = 0; hba_cg->default_groups[i]; i++) { item = &hba_cg->default_groups[i]->cg_item; hba_cg->default_groups[i] = NULL; config_item_put(item); } kfree(hba_cg->default_groups); hba_cg->default_groups = NULL; /* * We expect subsys->su_group.default_groups to be released * by configfs subsystem provider logic.. */ configfs_unregister_subsystem(subsys); kfree(subsys->su_group.default_groups); core_alua_free_lu_gp(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(); 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);