/******************************************************************************* * Filename: target_core_device.c (based on iscsi_target_device.c) * * This file contains the TCM Virtual Device and Disk Transport * agnostic related functions. * * (c) Copyright 2003-2012 RisingTide Systems LLC. * * Nicholas A. Bellinger * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ******************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "target_core_internal.h" #include "target_core_alua.h" #include "target_core_pr.h" #include "target_core_ua.h" static struct se_hba *lun0_hba; /* not static, needed by tpg.c */ struct se_device *g_lun0_dev; sense_reason_t transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) { struct se_lun *se_lun = NULL; struct se_session *se_sess = se_cmd->se_sess; struct se_device *dev; unsigned long flags; if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) return TCM_NON_EXISTENT_LUN; spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { struct se_dev_entry *deve = se_cmd->se_deve; deve->total_cmds++; if ((se_cmd->data_direction == DMA_TO_DEVICE) && (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) { pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN" " Access for 0x%08x\n", se_cmd->se_tfo->get_fabric_name(), unpacked_lun); spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); return TCM_WRITE_PROTECTED; } if (se_cmd->data_direction == DMA_TO_DEVICE) deve->write_bytes += se_cmd->data_length; else if (se_cmd->data_direction == DMA_FROM_DEVICE) deve->read_bytes += se_cmd->data_length; se_lun = deve->se_lun; se_cmd->se_lun = deve->se_lun; se_cmd->pr_res_key = deve->pr_res_key; se_cmd->orig_fe_lun = unpacked_lun; se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; } spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); if (!se_lun) { /* * Use the se_portal_group->tpg_virt_lun0 to allow for * REPORT_LUNS, et al to be returned when no active * MappedLUN=0 exists for this Initiator Port. */ if (unpacked_lun != 0) { pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" " Access for 0x%08x\n", se_cmd->se_tfo->get_fabric_name(), unpacked_lun); return TCM_NON_EXISTENT_LUN; } /* * Force WRITE PROTECT for virtual LUN 0 */ if ((se_cmd->data_direction != DMA_FROM_DEVICE) && (se_cmd->data_direction != DMA_NONE)) return TCM_WRITE_PROTECTED; se_lun = &se_sess->se_tpg->tpg_virt_lun0; se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0; se_cmd->orig_fe_lun = 0; se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; } /* Directly associate cmd with se_dev */ se_cmd->se_dev = se_lun->lun_se_dev; /* TODO: get rid of this and use atomics for stats */ dev = se_lun->lun_se_dev; spin_lock_irqsave(&dev->stats_lock, flags); dev->num_cmds++; if (se_cmd->data_direction == DMA_TO_DEVICE) dev->write_bytes += se_cmd->data_length; else if (se_cmd->data_direction == DMA_FROM_DEVICE) dev->read_bytes += se_cmd->data_length; spin_unlock_irqrestore(&dev->stats_lock, flags); spin_lock_irqsave(&se_lun->lun_cmd_lock, flags); list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list); spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags); return 0; } EXPORT_SYMBOL(transport_lookup_cmd_lun); int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) { struct se_dev_entry *deve; struct se_lun *se_lun = NULL; struct se_session *se_sess = se_cmd->se_sess; struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; unsigned long flags; if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) return -ENODEV; spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags); se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun]; deve = se_cmd->se_deve; if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { se_tmr->tmr_lun = deve->se_lun; se_cmd->se_lun = deve->se_lun; se_lun = deve->se_lun; se_cmd->pr_res_key = deve->pr_res_key; se_cmd->orig_fe_lun = unpacked_lun; } spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); if (!se_lun) { pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" " Access for 0x%08x\n", se_cmd->se_tfo->get_fabric_name(), unpacked_lun); return -ENODEV; } /* Directly associate cmd with se_dev */ se_cmd->se_dev = se_lun->lun_se_dev; se_tmr->tmr_dev = se_lun->lun_se_dev; spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags); list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list); spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags); return 0; } EXPORT_SYMBOL(transport_lookup_tmr_lun); /* * This function is called from core_scsi3_emulate_pro_register_and_move() * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count * when a matching rtpi is found. */ struct se_dev_entry *core_get_se_deve_from_rtpi( struct se_node_acl *nacl, u16 rtpi) { struct se_dev_entry *deve; struct se_lun *lun; struct se_port *port; struct se_portal_group *tpg = nacl->se_tpg; u32 i; spin_lock_irq(&nacl->device_list_lock); for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { deve = nacl->device_list[i]; if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) continue; lun = deve->se_lun; if (!lun) { pr_err("%s device entries device pointer is" " NULL, but Initiator has access.\n", tpg->se_tpg_tfo->get_fabric_name()); continue; } port = lun->lun_sep; if (!port) { pr_err("%s device entries device pointer is" " NULL, but Initiator has access.\n", tpg->se_tpg_tfo->get_fabric_name()); continue; } if (port->sep_rtpi != rtpi) continue; atomic_inc(&deve->pr_ref_count); smp_mb__after_atomic_inc(); spin_unlock_irq(&nacl->device_list_lock); return deve; } spin_unlock_irq(&nacl->device_list_lock); return NULL; } int core_free_device_list_for_node( struct se_node_acl *nacl, struct se_portal_group *tpg) { struct se_dev_entry *deve; struct se_lun *lun; u32 i; if (!nacl->device_list) return 0; spin_lock_irq(&nacl->device_list_lock); for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { deve = nacl->device_list[i]; if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)) continue; if (!deve->se_lun) { pr_err("%s device entries device pointer is" " NULL, but Initiator has access.\n", tpg->se_tpg_tfo->get_fabric_name()); continue; } lun = deve->se_lun; spin_unlock_irq(&nacl->device_list_lock); core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); spin_lock_irq(&nacl->device_list_lock); } spin_unlock_irq(&nacl->device_list_lock); array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); nacl->device_list = NULL; return 0; } void core_update_device_list_access( u32 mapped_lun, u32 lun_access, struct se_node_acl *nacl) { struct se_dev_entry *deve; spin_lock_irq(&nacl->device_list_lock); deve = nacl->device_list[mapped_lun]; if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; } else { deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; } spin_unlock_irq(&nacl->device_list_lock); } /* core_enable_device_list_for_node(): * * */ int core_enable_device_list_for_node( struct se_lun *lun, struct se_lun_acl *lun_acl, u32 mapped_lun, u32 lun_access, struct se_node_acl *nacl, struct se_portal_group *tpg) { struct se_port *port = lun->lun_sep; struct se_dev_entry *deve; spin_lock_irq(&nacl->device_list_lock); deve = nacl->device_list[mapped_lun]; /* * Check if the call is handling demo mode -> explict LUN ACL * transition. This transition must be for the same struct se_lun * + mapped_lun that was setup in demo mode.. */ if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) { if (deve->se_lun_acl != NULL) { pr_err("struct se_dev_entry->se_lun_acl" " already set for demo mode -> explict" " LUN ACL transition\n"); spin_unlock_irq(&nacl->device_list_lock); return -EINVAL; } if (deve->se_lun != lun) { pr_err("struct se_dev_entry->se_lun does" " match passed struct se_lun for demo mode" " -> explict LUN ACL transition\n"); spin_unlock_irq(&nacl->device_list_lock); return -EINVAL; } deve->se_lun_acl = lun_acl; if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; } else { deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; } spin_unlock_irq(&nacl->device_list_lock); return 0; } deve->se_lun = lun; deve->se_lun_acl = lun_acl; deve->mapped_lun = mapped_lun; deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS; if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) { deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY; deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; } else { deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE; deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; } deve->creation_time = get_jiffies_64(); deve->attach_count++; spin_unlock_irq(&nacl->device_list_lock); spin_lock_bh(&port->sep_alua_lock); list_add_tail(&deve->alua_port_list, &port->sep_alua_list); spin_unlock_bh(&port->sep_alua_lock); return 0; } /* core_disable_device_list_for_node(): * * */ int core_disable_device_list_for_node( struct se_lun *lun, struct se_lun_acl *lun_acl, u32 mapped_lun, u32 lun_access, struct se_node_acl *nacl, struct se_portal_group *tpg) { struct se_port *port = lun->lun_sep; struct se_dev_entry *deve = nacl->device_list[mapped_lun]; /* * If the MappedLUN entry is being disabled, the entry in * port->sep_alua_list must be removed now before clearing the * struct se_dev_entry pointers below as logic in * core_alua_do_transition_tg_pt() depends on these being present. * * deve->se_lun_acl will be NULL for demo-mode created LUNs * that have not been explicitly converted to MappedLUNs -> * struct se_lun_acl, but we remove deve->alua_port_list from * port->sep_alua_list. This also means that active UAs and * NodeACL context specific PR metadata for demo-mode * MappedLUN *deve will be released below.. */ spin_lock_bh(&port->sep_alua_lock); list_del(&deve->alua_port_list); spin_unlock_bh(&port->sep_alua_lock); /* * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE * PR operation to complete. */ while (atomic_read(&deve->pr_ref_count) != 0) cpu_relax(); spin_lock_irq(&nacl->device_list_lock); /* * Disable struct se_dev_entry LUN ACL mapping */ core_scsi3_ua_release_all(deve); deve->se_lun = NULL; deve->se_lun_acl = NULL; deve->lun_flags = 0; deve->creation_time = 0; deve->attach_count--; spin_unlock_irq(&nacl->device_list_lock); core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl); return 0; } /* core_clear_lun_from_tpg(): * * */ void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) { struct se_node_acl *nacl; struct se_dev_entry *deve; u32 i; spin_lock_irq(&tpg->acl_node_lock); list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) { spin_unlock_irq(&tpg->acl_node_lock); spin_lock_irq(&nacl->device_list_lock); for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) { deve = nacl->device_list[i]; if (lun != deve->se_lun) continue; spin_unlock_irq(&nacl->device_list_lock); core_disable_device_list_for_node(lun, NULL, deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); spin_lock_irq(&nacl->device_list_lock); } spin_unlock_irq(&nacl->device_list_lock); spin_lock_irq(&tpg->acl_node_lock); } spin_unlock_irq(&tpg->acl_node_lock); } static struct se_port *core_alloc_port(struct se_device *dev) { struct se_port *port, *port_tmp; port = kzalloc(sizeof(struct se_port), GFP_KERNEL); if (!port) { pr_err("Unable to allocate struct se_port\n"); return ERR_PTR(-ENOMEM); } INIT_LIST_HEAD(&port->sep_alua_list); INIT_LIST_HEAD(&port->sep_list); atomic_set(&port->sep_tg_pt_secondary_offline, 0); spin_lock_init(&port->sep_alua_lock); mutex_init(&port->sep_tg_pt_md_mutex); spin_lock(&dev->se_port_lock); if (dev->dev_port_count == 0x0000ffff) { pr_warn("Reached dev->dev_port_count ==" " 0x0000ffff\n"); spin_unlock(&dev->se_port_lock); return ERR_PTR(-ENOSPC); } again: /* * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device * Here is the table from spc4r17 section 7.7.3.8. * * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field * * Code Description * 0h Reserved * 1h Relative port 1, historically known as port A * 2h Relative port 2, historically known as port B * 3h to FFFFh Relative port 3 through 65 535 */ port->sep_rtpi = dev->dev_rpti_counter++; if (!port->sep_rtpi) goto again; list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { /* * Make sure RELATIVE TARGET PORT IDENTIFIER is unique * for 16-bit wrap.. */ if (port->sep_rtpi == port_tmp->sep_rtpi) goto again; } spin_unlock(&dev->se_port_lock); return port; } static void core_export_port( struct se_device *dev, struct se_portal_group *tpg, struct se_port *port, struct se_lun *lun) { struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL; spin_lock(&dev->se_port_lock); spin_lock(&lun->lun_sep_lock); port->sep_tpg = tpg; port->sep_lun = lun; lun->lun_sep = port; spin_unlock(&lun->lun_sep_lock); list_add_tail(&port->sep_list, &dev->dev_sep_list); spin_unlock(&dev->se_port_lock); if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV && !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) { tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port); if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) { pr_err("Unable to allocate t10_alua_tg_pt" "_gp_member_t\n"); return; } spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem, dev->t10_alua.default_tg_pt_gp); spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); pr_debug("%s/%s: Adding to default ALUA Target Port" " Group: alua/default_tg_pt_gp\n", dev->transport->name, tpg->se_tpg_tfo->get_fabric_name()); } dev->dev_port_count++; port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */ } /* * Called with struct se_device->se_port_lock spinlock held. */ static void core_release_port(struct se_device *dev, struct se_port *port) __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock) { /* * Wait for any port reference for PR ALL_TG_PT=1 operation * to complete in __core_scsi3_alloc_registration() */ spin_unlock(&dev->se_port_lock); if (atomic_read(&port->sep_tg_pt_ref_cnt)) cpu_relax(); spin_lock(&dev->se_port_lock); core_alua_free_tg_pt_gp_mem(port); list_del(&port->sep_list); dev->dev_port_count--; kfree(port); } int core_dev_export( struct se_device *dev, struct se_portal_group *tpg, struct se_lun *lun) { struct se_hba *hba = dev->se_hba; struct se_port *port; port = core_alloc_port(dev); if (IS_ERR(port)) return PTR_ERR(port); lun->lun_se_dev = dev; spin_lock(&hba->device_lock); dev->export_count++; spin_unlock(&hba->device_lock); core_export_port(dev, tpg, port, lun); return 0; } void core_dev_unexport( struct se_device *dev, struct se_portal_group *tpg, struct se_lun *lun) { struct se_hba *hba = dev->se_hba; struct se_port *port = lun->lun_sep; spin_lock(&lun->lun_sep_lock); if (lun->lun_se_dev == NULL) { spin_unlock(&lun->lun_sep_lock); return; } spin_unlock(&lun->lun_sep_lock); spin_lock(&dev->se_port_lock); core_release_port(dev, port); spin_unlock(&dev->se_port_lock); spin_lock(&hba->device_lock); dev->export_count--; spin_unlock(&hba->device_lock); lun->lun_se_dev = NULL; } static void se_release_vpd_for_dev(struct se_device *dev) { struct t10_vpd *vpd, *vpd_tmp; spin_lock(&dev->t10_wwn.t10_vpd_lock); list_for_each_entry_safe(vpd, vpd_tmp, &dev->t10_wwn.t10_vpd_list, vpd_list) { list_del(&vpd->vpd_list); kfree(vpd); } spin_unlock(&dev->t10_wwn.t10_vpd_lock); } static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) { u32 aligned_max_sectors; u32 alignment; /* * Limit max_sectors to a PAGE_SIZE aligned value for modern * transport_allocate_data_tasks() operation. */ alignment = max(1ul, PAGE_SIZE / block_size); aligned_max_sectors = rounddown(max_sectors, alignment); if (max_sectors != aligned_max_sectors) pr_info("Rounding down aligned max_sectors from %u to %u\n", max_sectors, aligned_max_sectors); return aligned_max_sectors; } int se_dev_set_max_unmap_lba_count( struct se_device *dev, u32 max_unmap_lba_count) { dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count; pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n", dev, dev->dev_attrib.max_unmap_lba_count); return 0; } int se_dev_set_max_unmap_block_desc_count( struct se_device *dev, u32 max_unmap_block_desc_count) { dev->dev_attrib.max_unmap_block_desc_count = max_unmap_block_desc_count; pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n", dev, dev->dev_attrib.max_unmap_block_desc_count); return 0; } int se_dev_set_unmap_granularity( struct se_device *dev, u32 unmap_granularity) { dev->dev_attrib.unmap_granularity = unmap_granularity; pr_debug("dev[%p]: Set unmap_granularity: %u\n", dev, dev->dev_attrib.unmap_granularity); return 0; } int se_dev_set_unmap_granularity_alignment( struct se_device *dev, u32 unmap_granularity_alignment) { dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment; pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n", dev, dev->dev_attrib.unmap_granularity_alignment); return 0; } int se_dev_set_max_write_same_len( struct se_device *dev, u32 max_write_same_len) { dev->dev_attrib.max_write_same_len = max_write_same_len; pr_debug("dev[%p]: Set max_write_same_len: %u\n", dev, dev->dev_attrib.max_write_same_len); return 0; } static void dev_set_t10_wwn_model_alias(struct se_device *dev) { const char *configname; configname = config_item_name(&dev->dev_group.cg_item); if (strlen(configname) >= 16) { pr_warn("dev[%p]: Backstore name '%s' is too long for " "INQUIRY_MODEL, truncating to 16 bytes\n", dev, configname); } snprintf(&dev->t10_wwn.model[0], 16, "%s", configname); } int se_dev_set_emulate_model_alias(struct se_device *dev, int flag) { 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; } if (flag != 0 && flag != 1) { pr_err("Illegal value %d\n", flag); return -EINVAL; } if (flag) { dev_set_t10_wwn_model_alias(dev); } else { strncpy(&dev->t10_wwn.model[0], dev->transport->inquiry_prod, 16); } dev->dev_attrib.emulate_model_alias = flag; return 0; } int se_dev_set_emulate_dpo(struct se_device *dev, int flag) { if (flag != 0 && flag != 1) { pr_err("Illegal value %d\n", flag); return -EINVAL; } if (flag) { pr_err("dpo_emulated not supported\n"); return -EINVAL; } return 0; } int se_dev_set_emulate_fua_write(struct se_device *dev, int flag) { if (flag != 0 && flag != 1) { pr_err("Illegal value %d\n", flag); return -EINVAL; } if (flag && dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { pr_err("emulate_fua_write not supported for pSCSI\n"); return -EINVAL; } dev->dev_attrib.emulate_fua_write = flag; pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n", dev, dev->dev_attrib.emulate_fua_write); return 0; } int se_dev_set_emulate_fua_read(struct se_device *dev, int flag) { if (flag != 0 && flag != 1) { pr_err("Illegal value %d\n", flag); return -EINVAL; } if (flag) { pr_err("ua read emulated not supported\n"); return -EINVAL; } return 0; } int se_dev_set_emulate_write_cache(struct se_device *dev, int flag) { if (flag != 0 && flag != 1) { pr_err("Illegal value %d\n", flag); return -EINVAL; } if (flag && dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { pr_err("emulate_write_cache not supported for pSCSI\n"); return -EINVAL; } if (dev->transport->get_write_cache) { pr_warn("emulate_write_cache cannot be changed when underlying" " HW reports WriteCacheEnabled, ignoring request\n"); return 0; } dev->dev_attrib.emulate_write_cache = flag; pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n", dev, dev->dev_attrib.emulate_write_cache); return 0; } int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag) { if ((flag != 0) && (flag != 1) && (flag != 2)) { pr_err("Illegal value %d\n", flag); return -EINVAL; } if (dev->export_count) { pr_err("dev[%p]: Unable to change SE Device" " UA_INTRLCK_CTRL while export_count is %d\n", dev, dev->export_count); return -EINVAL; } dev->dev_attrib.emulate_ua_intlck_ctrl = flag; pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n", dev, dev->dev_attrib.emulate_ua_intlck_ctrl); return 0; } int se_dev_set_emulate_tas(struct se_device *dev, int flag) { if ((flag != 0) && (flag != 1)) { pr_err("Illegal value %d\n", flag); return -EINVAL; } if (dev->export_count) { pr_err("dev[%p]: Unable to change SE Device TAS while" " export_count is %d\n", dev, dev->export_count); return -EINVAL; } dev->dev_attrib.emulate_tas = flag; pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n", dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled"); return 0; } int se_dev_set_emulate_tpu(struct se_device *dev, int flag) { if ((flag != 0) && (flag != 1)) { pr_err("Illegal value %d\n", flag); return -EINVAL; } /* * We expect this value to be non-zero when generic Block Layer * Discard supported is detected iblock_create_virtdevice(). */ if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { pr_err("Generic Block Discard not supported\n"); return -ENOSYS; } dev->dev_attrib.emulate_tpu = flag; pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n", dev, flag); return 0; } int se_dev_set_emulate_tpws(struct se_device *dev, int flag) { if ((flag != 0) && (flag != 1)) { pr_err("Illegal value %d\n", flag); return -EINVAL; } /* * We expect this value to be non-zero when generic Block Layer * Discard supported is detected iblock_create_virtdevice(). */ if (flag && !dev->dev_attrib.max_unmap_block_desc_count) { pr_err("Generic Block Discard not supported\n"); return -ENOSYS; } dev->dev_attrib.emulate_tpws = flag; pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n", dev, flag); return 0; } int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag) { if ((flag != 0) && (flag != 1)) { pr_err("Illegal value %d\n", flag); return -EINVAL; } dev->dev_attrib.enforce_pr_isids = flag; pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev, (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled"); return 0; } int se_dev_set_is_nonrot(struct se_device *dev, int flag) { if ((flag != 0) && (flag != 1)) { printk(KERN_ERR "Illegal value %d\n", flag); return -EINVAL; } dev->dev_attrib.is_nonrot = flag; pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n", dev, flag); return 0; } int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag) { if (flag != 0) { printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted" " reordering not implemented\n", dev); return -ENOSYS; } dev->dev_attrib.emulate_rest_reord = flag; pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag); return 0; } /* * Note, this can only be called on unexported SE Device Object. */ int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth) { 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 (!queue_depth) { pr_err("dev[%p]: Illegal ZERO value for queue" "_depth\n", dev); return -EINVAL; } if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { if (queue_depth > dev->dev_attrib.hw_queue_depth) { pr_err("dev[%p]: Passed queue_depth: %u" " exceeds TCM/SE_Device TCQ: %u\n", dev, queue_depth, dev->dev_attrib.hw_queue_depth); return -EINVAL; } } else { if (queue_depth > dev->dev_attrib.queue_depth) { if (queue_depth > dev->dev_attrib.hw_queue_depth) { pr_err("dev[%p]: Passed queue_depth:" " %u exceeds TCM/SE_Device MAX" " TCQ: %u\n", dev, queue_depth, dev->dev_attrib.hw_queue_depth); return -EINVAL; } } } dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth; pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, queue_depth); return 0; } int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors) { int block_size = dev->dev_attrib.block_size; if (dev->export_count) { pr_err("dev[%p]: Unable to change SE Device" " fabric_max_sectors while export_count is %d\n", dev, dev->export_count); return -EINVAL; } if (!fabric_max_sectors) { pr_err("dev[%p]: Illegal ZERO value for" " fabric_max_sectors\n", dev); return -EINVAL; } if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) { pr_err("dev[%p]: Passed fabric_max_sectors: %u less than" " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors, DA_STATUS_MAX_SECTORS_MIN); return -EINVAL; } if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) { pr_err("dev[%p]: Passed fabric_max_sectors: %u" " greater than TCM/SE_Device max_sectors:" " %u\n", dev, fabric_max_sectors, dev->dev_attrib.hw_max_sectors); return -EINVAL; } } else { if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) { pr_err("dev[%p]: Passed fabric_max_sectors: %u" " greater than DA_STATUS_MAX_SECTORS_MAX:" " %u\n", dev, fabric_max_sectors, DA_STATUS_MAX_SECTORS_MAX); return -EINVAL; } } /* * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks() */ if (!block_size) { block_size = 512; pr_warn("Defaulting to 512 for zero block_size\n"); } fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors, block_size); dev->dev_attrib.fabric_max_sectors = fabric_max_sectors; pr_debug("dev[%p]: SE Device max_sectors changed to %u\n", dev, fabric_max_sectors); return 0; } int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors) { if (dev->export_count) { pr_err("dev[%p]: Unable to change SE Device" " optimal_sectors while export_count is %d\n", dev, dev->export_count); return -EINVAL; } if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { pr_err("dev[%p]: Passed optimal_sectors cannot be" " changed for TCM/pSCSI\n", dev); return -EINVAL; } if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) { pr_err("dev[%p]: Passed optimal_sectors %u cannot be" " greater than fabric_max_sectors: %u\n", dev, optimal_sectors, dev->dev_attrib.fabric_max_sectors); return -EINVAL; } dev->dev_attrib.optimal_sectors = optimal_sectors; pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n", dev, optimal_sectors); return 0; } int se_dev_set_block_size(struct se_device *dev, u32 block_size) { if (dev->export_count) { pr_err("dev[%p]: Unable to change SE Device block_size" " while export_count is %d\n", dev, dev->export_count); return -EINVAL; } if ((block_size != 512) && (block_size != 1024) && (block_size != 2048) && (block_size != 4096)) { pr_err("dev[%p]: Illegal value for block_device: %u" " for SE device, must be 512, 1024, 2048 or 4096\n", dev, block_size); return -EINVAL; } if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) { pr_err("dev[%p]: Not allowed to change block_size for" " Physical Device, use for Linux/SCSI to change" " block_size for underlying hardware\n", dev); return -EINVAL; } dev->dev_attrib.block_size = block_size; pr_debug("dev[%p]: SE Device block_size changed to %u\n", dev, block_size); return 0; } struct se_lun *core_dev_add_lun( struct se_portal_group *tpg, struct se_device *dev, u32 lun) { struct se_lun *lun_p; int rc; lun_p = core_tpg_pre_addlun(tpg, lun); if (IS_ERR(lun_p)) return lun_p; rc = core_tpg_post_addlun(tpg, lun_p, TRANSPORT_LUNFLAGS_READ_WRITE, dev); if (rc < 0) return ERR_PTR(rc); pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(), tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id); /* * Update LUN maps for dynamically added initiators when * generate_node_acl is enabled. */ if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { struct se_node_acl *acl; spin_lock_irq(&tpg->acl_node_lock); list_for_each_entry(acl, &tpg->acl_node_list, acl_list) { if (acl->dynamic_node_acl && (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only || !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) { spin_unlock_irq(&tpg->acl_node_lock); core_tpg_add_node_to_devs(acl, tpg); spin_lock_irq(&tpg->acl_node_lock); } } spin_unlock_irq(&tpg->acl_node_lock); } return lun_p; } /* core_dev_del_lun(): * * */ int core_dev_del_lun( struct se_portal_group *tpg, u32 unpacked_lun) { struct se_lun *lun; lun = core_tpg_pre_dellun(tpg, unpacked_lun); if (IS_ERR(lun)) return PTR_ERR(lun); core_tpg_post_dellun(tpg, lun); pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from" " device object\n", tpg->se_tpg_tfo->get_fabric_name(), tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, tpg->se_tpg_tfo->get_fabric_name()); return 0; } struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun) { struct se_lun *lun; spin_lock(&tpg->tpg_lun_lock); if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS" "_PER_TPG-1: %u for Target Portal Group: %hu\n", tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, tpg->se_tpg_tfo->tpg_get_tag(tpg)); spin_unlock(&tpg->tpg_lun_lock); return NULL; } lun = tpg->tpg_lun_list[unpacked_lun]; if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) { pr_err("%s Logical Unit Number: %u is not free on" " Target Portal Group: %hu, ignoring request.\n", tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, tpg->se_tpg_tfo->tpg_get_tag(tpg)); spin_unlock(&tpg->tpg_lun_lock); return NULL; } spin_unlock(&tpg->tpg_lun_lock); return lun; } /* core_dev_get_lun(): * * */ static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun) { struct se_lun *lun; spin_lock(&tpg->tpg_lun_lock); if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) { pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER" "_TPG-1: %u for Target Portal Group: %hu\n", tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1, tpg->se_tpg_tfo->tpg_get_tag(tpg)); spin_unlock(&tpg->tpg_lun_lock); return NULL; } lun = tpg->tpg_lun_list[unpacked_lun]; if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) { pr_err("%s Logical Unit Number: %u is not active on" " Target Portal Group: %hu, ignoring request.\n", tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, tpg->se_tpg_tfo->tpg_get_tag(tpg)); spin_unlock(&tpg->tpg_lun_lock); return NULL; } spin_unlock(&tpg->tpg_lun_lock); return lun; } struct se_lun_acl *core_dev_init_initiator_node_lun_acl( struct se_portal_group *tpg, struct se_node_acl *nacl, u32 mapped_lun, int *ret) { struct se_lun_acl *lacl; if (strlen(nacl->initiatorname) >= TRANSPORT_IQN_LEN) { pr_err("%s InitiatorName exceeds maximum size.\n", tpg->se_tpg_tfo->get_fabric_name()); *ret = -EOVERFLOW; return NULL; } lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL); if (!lacl) { pr_err("Unable to allocate memory for struct se_lun_acl.\n"); *ret = -ENOMEM; return NULL; } INIT_LIST_HEAD(&lacl->lacl_list); lacl->mapped_lun = mapped_lun; lacl->se_lun_nacl = nacl; snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", nacl->initiatorname); return lacl; } int core_dev_add_initiator_node_lun_acl( struct se_portal_group *tpg, struct se_lun_acl *lacl, u32 unpacked_lun, u32 lun_access) { struct se_lun *lun; struct se_node_acl *nacl; lun = core_dev_get_lun(tpg, unpacked_lun); if (!lun) { pr_err("%s Logical Unit Number: %u is not active on" " Target Portal Group: %hu, ignoring request.\n", tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, tpg->se_tpg_tfo->tpg_get_tag(tpg)); return -EINVAL; } nacl = lacl->se_lun_nacl; if (!nacl) return -EINVAL; if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) && (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE)) lun_access = TRANSPORT_LUNFLAGS_READ_ONLY; lacl->se_lun = lun; if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun, lun_access, nacl, tpg) < 0) return -EINVAL; spin_lock(&lun->lun_acl_lock); list_add_tail(&lacl->lacl_list, &lun->lun_acl_list); atomic_inc(&lun->lun_acl_count); smp_mb__after_atomic_inc(); spin_unlock(&lun->lun_acl_lock); pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for " " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(), tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun, (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", lacl->initiatorname); /* * Check to see if there are any existing persistent reservation APTPL * pre-registrations that need to be enabled for this LUN ACL.. */ core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl); return 0; } /* core_dev_del_initiator_node_lun_acl(): * * */ int core_dev_del_initiator_node_lun_acl( struct se_portal_group *tpg, struct se_lun *lun, struct se_lun_acl *lacl) { struct se_node_acl *nacl; nacl = lacl->se_lun_nacl; if (!nacl) return -EINVAL; spin_lock(&lun->lun_acl_lock); list_del(&lacl->lacl_list); atomic_dec(&lun->lun_acl_count); smp_mb__after_atomic_dec(); spin_unlock(&lun->lun_acl_lock); core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg); lacl->se_lun = NULL; pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" " InitiatorNode: %s Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->initiatorname, lacl->mapped_lun); return 0; } void core_dev_free_initiator_node_lun_acl( struct se_portal_group *tpg, struct se_lun_acl *lacl) { pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s" " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(), tpg->se_tpg_tfo->tpg_get_tag(tpg), tpg->se_tpg_tfo->get_fabric_name(), lacl->initiatorname, lacl->mapped_lun); kfree(lacl); } static void scsi_dump_inquiry(struct se_device *dev) { struct t10_wwn *wwn = &dev->t10_wwn; char buf[17]; int i, device_type; /* * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer */ for (i = 0; i < 8; i++) if (wwn->vendor[i] >= 0x20) buf[i] = wwn->vendor[i]; else buf[i] = ' '; buf[i] = '\0'; pr_debug(" Vendor: %s\n", buf); for (i = 0; i < 16; i++) if (wwn->model[i] >= 0x20) buf[i] = wwn->model[i]; else buf[i] = ' '; buf[i] = '\0'; pr_debug(" Model: %s\n", buf); for (i = 0; i < 4; i++) if (wwn->revision[i] >= 0x20) buf[i] = wwn->revision[i]; else buf[i] = ' '; buf[i] = '\0'; pr_debug(" Revision: %s\n", buf); device_type = dev->transport->get_device_type(dev); pr_debug(" Type: %s ", scsi_device_type(device_type)); } struct se_device *target_alloc_device(struct se_hba *hba, const char *name) { struct se_device *dev; dev = hba->transport->alloc_device(hba, name); if (!dev) return NULL; dev->dev_link_magic = SE_DEV_LINK_MAGIC; dev->se_hba = hba; dev->transport = hba->transport; INIT_LIST_HEAD(&dev->dev_list); INIT_LIST_HEAD(&dev->dev_sep_list); INIT_LIST_HEAD(&dev->dev_tmr_list); INIT_LIST_HEAD(&dev->delayed_cmd_list); INIT_LIST_HEAD(&dev->state_list); INIT_LIST_HEAD(&dev->qf_cmd_list); spin_lock_init(&dev->stats_lock); spin_lock_init(&dev->execute_task_lock); spin_lock_init(&dev->delayed_cmd_lock); spin_lock_init(&dev->dev_reservation_lock); spin_lock_init(&dev->se_port_lock); spin_lock_init(&dev->se_tmr_lock); spin_lock_init(&dev->qf_cmd_lock); atomic_set(&dev->dev_ordered_id, 0); INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list); spin_lock_init(&dev->t10_wwn.t10_vpd_lock); INIT_LIST_HEAD(&dev->t10_pr.registration_list); INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list); spin_lock_init(&dev->t10_pr.registration_lock); spin_lock_init(&dev->t10_pr.aptpl_reg_lock); INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list); spin_lock_init(&dev->t10_alua.tg_pt_gps_lock); dev->t10_wwn.t10_dev = dev; dev->t10_alua.t10_dev = dev; dev->dev_attrib.da_dev = dev; dev->dev_attrib.emulate_model_alias = DA_EMULATE_MODEL_ALIAS; dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO; dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE; dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ; dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE; dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL; dev->dev_attrib.emulate_tas = DA_EMULATE_TAS; dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU; dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS; dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; dev->dev_attrib.is_nonrot = DA_IS_NONROT; dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD; dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT; dev->dev_attrib.max_unmap_block_desc_count = DA_MAX_UNMAP_BLOCK_DESC_COUNT; dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT; dev->dev_attrib.unmap_granularity_alignment = DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT; dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN; dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS; dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS; return dev; } int target_configure_device(struct se_device *dev) { struct se_hba *hba = dev->se_hba; int ret; if (dev->dev_flags & DF_CONFIGURED) { pr_err("se_dev->se_dev_ptr already set for storage" " object\n"); return -EEXIST; } ret = dev->transport->configure_device(dev); if (ret) goto out; dev->dev_flags |= DF_CONFIGURED; /* * XXX: there is not much point to have two different values here.. */ dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size; dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth; /* * Align max_hw_sectors down to PAGE_SIZE I/O transfers */ dev->dev_attrib.hw_max_sectors = se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors, dev->dev_attrib.hw_block_size); dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX); dev->creation_time = get_jiffies_64(); ret = core_setup_alua(dev); if (ret) goto out; /* * Startup the struct se_device processing thread */ dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1, dev->transport->name); if (!dev->tmr_wq) { pr_err("Unable to create tmr workqueue for %s\n", dev->transport->name); ret = -ENOMEM; goto out_free_alua; } /* * Setup work_queue for QUEUE_FULL */ INIT_WORK(&dev->qf_work_queue, target_qf_do_work); /* * Preload the initial INQUIRY const values if we are doing * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI * passthrough because this is being provided by the backend LLD. */ if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) { strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8); strncpy(&dev->t10_wwn.model[0], dev->transport->inquiry_prod, 16); strncpy(&dev->t10_wwn.revision[0], dev->transport->inquiry_rev, 4); } scsi_dump_inquiry(dev); spin_lock(&hba->device_lock); hba->dev_count++; spin_unlock(&hba->device_lock); return 0; out_free_alua: core_alua_free_lu_gp_mem(dev); out: se_release_vpd_for_dev(dev); return ret; } void target_free_device(struct se_device *dev) { struct se_hba *hba = dev->se_hba; WARN_ON(!list_empty(&dev->dev_sep_list)); if (dev->dev_flags & DF_CONFIGURED) { destroy_workqueue(dev->tmr_wq); spin_lock(&hba->device_lock); hba->dev_count--; spin_unlock(&hba->device_lock); } core_alua_free_lu_gp_mem(dev); core_scsi3_free_all_registrations(dev); se_release_vpd_for_dev(dev); dev->transport->free_device(dev); } int core_dev_setup_virtual_lun0(void) { struct se_hba *hba; struct se_device *dev; char buf[] = "rd_pages=8,rd_nullio=1"; int ret; hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE); if (IS_ERR(hba)) return PTR_ERR(hba); dev = target_alloc_device(hba, "virt_lun0"); if (!dev) { ret = -ENOMEM; goto out_free_hba; } hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); ret = target_configure_device(dev); if (ret) goto out_free_se_dev; lun0_hba = hba; g_lun0_dev = dev; return 0; out_free_se_dev: target_free_device(dev); out_free_hba: core_delete_hba(hba); return ret; } void core_dev_release_virtual_lun0(void) { struct se_hba *hba = lun0_hba; if (!hba) return; if (g_lun0_dev) target_free_device(g_lun0_dev); core_delete_hba(hba); }