diff options
Diffstat (limited to 'kernel/drivers/target/target_core_device.c')
| -rw-r--r-- | kernel/drivers/target/target_core_device.c | 1783 |
1 files changed, 1783 insertions, 0 deletions
diff --git a/kernel/drivers/target/target_core_device.c b/kernel/drivers/target/target_core_device.c new file mode 100644 index 000000000..ce5f76818 --- /dev/null +++ b/kernel/drivers/target/target_core_device.c @@ -0,0 +1,1783 @@ +/******************************************************************************* + * 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 2003-2013 Datera, Inc. + * + * Nicholas A. Bellinger <nab@kernel.org> + * + * 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 <linux/net.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/kthread.h> +#include <linux/in.h> +#include <linux/export.h> +#include <asm/unaligned.h> +#include <net/sock.h> +#include <net/tcp.h> +#include <scsi/scsi.h> +#include <scsi/scsi_device.h> + +#include <target/target_core_base.h> +#include <target/target_core_backend.h> +#include <target/target_core_fabric.h> + +#include "target_core_internal.h" +#include "target_core_alua.h" +#include "target_core_pr.h" +#include "target_core_ua.h" + +DEFINE_MUTEX(g_device_mutex); +LIST_HEAD(g_device_list); + +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; + + percpu_ref_get(&se_lun->lun_ref); + se_cmd->lun_ref_active = true; + } + 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; + + percpu_ref_get(&se_lun->lun_ref); + se_cmd->lun_ref_active = true; + } + + /* Directly associate cmd with se_dev */ + se_cmd->se_dev = se_lun->lun_se_dev; + + dev = se_lun->lun_se_dev; + atomic_long_inc(&dev->num_cmds); + if (se_cmd->data_direction == DMA_TO_DEVICE) + atomic_long_add(se_cmd->data_length, &dev->write_bytes); + else if (se_cmd->data_direction == DMA_FROM_DEVICE) + atomic_long_add(se_cmd->data_length, &dev->read_bytes); + + 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_mb(&deve->pr_ref_count); + 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 -> explicit 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 -> explicit" + " 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" + " -> explicit 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_flags & TRANSPORT_FLAG_PASSTHROUGH) && + !(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_sep = NULL; + 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; +} + +bool se_dev_check_wce(struct se_device *dev) +{ + bool wce = false; + + if (dev->transport->get_write_cache) + wce = dev->transport->get_write_cache(dev); + else if (dev->dev_attrib.emulate_write_cache > 0) + wce = true; + + return wce; +} + +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; +} +EXPORT_SYMBOL(se_dev_set_max_unmap_lba_count); + +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; +} +EXPORT_SYMBOL(se_dev_set_max_unmap_block_desc_count); + +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; +} +EXPORT_SYMBOL(se_dev_set_unmap_granularity); + +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; +} +EXPORT_SYMBOL(se_dev_set_unmap_granularity_alignment); + +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; +} +EXPORT_SYMBOL(se_dev_set_max_write_same_len); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_model_alias); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_dpo); + +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->get_write_cache) { + pr_warn("emulate_fua_write not supported for this device, ignoring\n"); + return 0; + } + if (dev->export_count) { + pr_err("emulate_fua_write cannot be changed with active" + " exports: %d\n", dev->export_count); + 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; +} +EXPORT_SYMBOL(se_dev_set_emulate_fua_write); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_fua_read); + +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->get_write_cache) { + pr_err("emulate_write_cache not supported for this device\n"); + return -EINVAL; + } + if (dev->export_count) { + pr_err("emulate_write_cache cannot be changed with active" + " exports: %d\n", dev->export_count); + return -EINVAL; + } + 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; +} +EXPORT_SYMBOL(se_dev_set_emulate_write_cache); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_ua_intlck_ctrl); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_tas); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_tpu); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_tpws); + +int se_dev_set_emulate_caw(struct se_device *dev, int flag) +{ + if (flag != 0 && flag != 1) { + pr_err("Illegal value %d\n", flag); + return -EINVAL; + } + dev->dev_attrib.emulate_caw = flag; + pr_debug("dev[%p]: SE Device CompareAndWrite (AtomicTestandSet): %d\n", + dev, flag); + + return 0; +} +EXPORT_SYMBOL(se_dev_set_emulate_caw); + +int se_dev_set_emulate_3pc(struct se_device *dev, int flag) +{ + if (flag != 0 && flag != 1) { + pr_err("Illegal value %d\n", flag); + return -EINVAL; + } + dev->dev_attrib.emulate_3pc = flag; + pr_debug("dev[%p]: SE Device 3rd Party Copy (EXTENDED_COPY): %d\n", + dev, flag); + + return 0; +} +EXPORT_SYMBOL(se_dev_set_emulate_3pc); + +int se_dev_set_pi_prot_type(struct se_device *dev, int flag) +{ + int rc, old_prot = dev->dev_attrib.pi_prot_type; + + if (flag != 0 && flag != 1 && flag != 2 && flag != 3) { + pr_err("Illegal value %d for pi_prot_type\n", flag); + return -EINVAL; + } + if (flag == 2) { + pr_err("DIF TYPE2 protection currently not supported\n"); + return -ENOSYS; + } + if (dev->dev_attrib.hw_pi_prot_type) { + pr_warn("DIF protection enabled on underlying hardware," + " ignoring\n"); + return 0; + } + if (!dev->transport->init_prot || !dev->transport->free_prot) { + /* 0 is only allowed value for non-supporting backends */ + if (flag == 0) + return 0; + + pr_err("DIF protection not supported by backend: %s\n", + dev->transport->name); + return -ENOSYS; + } + if (!(dev->dev_flags & DF_CONFIGURED)) { + pr_err("DIF protection requires device to be configured\n"); + return -ENODEV; + } + if (dev->export_count) { + pr_err("dev[%p]: Unable to change SE Device PROT type while" + " export_count is %d\n", dev, dev->export_count); + return -EINVAL; + } + + dev->dev_attrib.pi_prot_type = flag; + + if (flag && !old_prot) { + rc = dev->transport->init_prot(dev); + if (rc) { + dev->dev_attrib.pi_prot_type = old_prot; + return rc; + } + + } else if (!flag && old_prot) { + dev->transport->free_prot(dev); + } + pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag); + + return 0; +} +EXPORT_SYMBOL(se_dev_set_pi_prot_type); + +int se_dev_set_pi_prot_format(struct se_device *dev, int flag) +{ + int rc; + + if (!flag) + return 0; + + if (flag != 1) { + pr_err("Illegal value %d for pi_prot_format\n", flag); + return -EINVAL; + } + if (!dev->transport->format_prot) { + pr_err("DIF protection format not supported by backend %s\n", + dev->transport->name); + return -ENOSYS; + } + if (!(dev->dev_flags & DF_CONFIGURED)) { + pr_err("DIF protection format requires device to be configured\n"); + return -ENODEV; + } + if (dev->export_count) { + pr_err("dev[%p]: Unable to format SE Device PROT type while" + " export_count is %d\n", dev, dev->export_count); + return -EINVAL; + } + + rc = dev->transport->format_prot(dev); + if (rc) + return rc; + + pr_debug("dev[%p]: SE Device Protection Format complete\n", dev); + + return 0; +} +EXPORT_SYMBOL(se_dev_set_pi_prot_format); + +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; +} +EXPORT_SYMBOL(se_dev_set_enforce_pr_isids); + +int se_dev_set_force_pr_aptpl(struct se_device *dev, int flag) +{ + if ((flag != 0) && (flag != 1)) { + printk(KERN_ERR "Illegal value %d\n", flag); + return -EINVAL; + } + if (dev->export_count) { + pr_err("dev[%p]: Unable to set force_pr_aptpl while" + " export_count is %d\n", dev, dev->export_count); + return -EINVAL; + } + + dev->dev_attrib.force_pr_aptpl = flag; + pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", dev, flag); + return 0; +} +EXPORT_SYMBOL(se_dev_set_force_pr_aptpl); + +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; +} +EXPORT_SYMBOL(se_dev_set_is_nonrot); + +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; +} +EXPORT_SYMBOL(se_dev_set_emulate_rest_reord); + +/* + * 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 (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; +} +EXPORT_SYMBOL(se_dev_set_queue_depth); + +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 (optimal_sectors > dev->dev_attrib.hw_max_sectors) { + pr_err("dev[%p]: Passed optimal_sectors %u cannot be" + " greater than hw_max_sectors: %u\n", dev, + optimal_sectors, dev->dev_attrib.hw_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; +} +EXPORT_SYMBOL(se_dev_set_optimal_sectors); + +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; + } + + dev->dev_attrib.block_size = block_size; + pr_debug("dev[%p]: SE Device block_size changed to %u\n", + dev, block_size); + + if (dev->dev_attrib.max_bytes_per_io) + dev->dev_attrib.hw_max_sectors = + dev->dev_attrib.max_bytes_per_io / block_size; + + return 0; +} +EXPORT_SYMBOL(se_dev_set_block_size); + +struct se_lun *core_dev_add_lun( + struct se_portal_group *tpg, + struct se_device *dev, + u32 unpacked_lun) +{ + struct se_lun *lun; + int rc; + + lun = core_tpg_alloc_lun(tpg, unpacked_lun); + if (IS_ERR(lun)) + return lun; + + rc = core_tpg_add_lun(tpg, lun, + 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->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; +} + +/* core_dev_del_lun(): + * + * + */ +void core_dev_del_lun( + struct se_portal_group *tpg, + struct se_lun *lun) +{ + pr_debug("%s_TPG[%u]_LUN[%u] - Deactivating %s Logical Unit from" + " device object\n", tpg->se_tpg_tfo->get_fabric_name(), + tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, + tpg->se_tpg_tfo->get_fabric_name()); + + core_tpg_remove_lun(tpg, lun); +} + +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_mb(&lun->lun_acl_count); + 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, nacl, + lacl->mapped_lun); + 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_mb(&lun->lun_acl_count); + 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; + struct se_lun *xcopy_lun; + + 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; + dev->prot_length = sizeof(struct se_dif_v1_tuple); + + 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); + INIT_LIST_HEAD(&dev->g_dev_node); + 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); + sema_init(&dev->caw_sem, 1); + 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); + INIT_LIST_HEAD(&dev->t10_alua.lba_map_list); + spin_lock_init(&dev->t10_alua.lba_map_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.emulate_caw = DA_EMULATE_CAW; + dev->dev_attrib.emulate_3pc = DA_EMULATE_3PC; + dev->dev_attrib.pi_prot_type = TARGET_DIF_TYPE0_PROT; + dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS; + dev->dev_attrib.force_pr_aptpl = DA_FORCE_PR_APTPL; + 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; + + xcopy_lun = &dev->xcopy_lun; + xcopy_lun->lun_se_dev = dev; + init_completion(&xcopy_lun->lun_shutdown_comp); + INIT_LIST_HEAD(&xcopy_lun->lun_acl_list); + spin_lock_init(&xcopy_lun->lun_acl_lock); + spin_lock_init(&xcopy_lun->lun_sep_lock); + init_completion(&xcopy_lun->lun_ref_comp); + + 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; + /* + * 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_attrib.optimal_sectors = dev->dev_attrib.hw_max_sectors; + + 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_flags & TRANSPORT_FLAG_PASSTHROUGH)) { + 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); + + mutex_lock(&g_device_mutex); + list_add_tail(&dev->g_dev_node, &g_device_list); + mutex_unlock(&g_device_mutex); + + dev->dev_flags |= DF_CONFIGURED; + + 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); + + mutex_lock(&g_device_mutex); + list_del(&dev->g_dev_node); + mutex_unlock(&g_device_mutex); + + spin_lock(&hba->device_lock); + hba->dev_count--; + spin_unlock(&hba->device_lock); + } + + core_alua_free_lu_gp_mem(dev); + core_alua_set_lba_map(dev, NULL, 0, 0); + core_scsi3_free_all_registrations(dev); + se_release_vpd_for_dev(dev); + + if (dev->transport->free_prot) + dev->transport->free_prot(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); +} + +/* + * Common CDB parsing for kernel and user passthrough. + */ +sense_reason_t +passthrough_parse_cdb(struct se_cmd *cmd, + sense_reason_t (*exec_cmd)(struct se_cmd *cmd)) +{ + unsigned char *cdb = cmd->t_task_cdb; + + /* + * Clear a lun set in the cdb if the initiator talking to use spoke + * and old standards version, as we can't assume the underlying device + * won't choke up on it. + */ + switch (cdb[0]) { + case READ_10: /* SBC - RDProtect */ + case READ_12: /* SBC - RDProtect */ + case READ_16: /* SBC - RDProtect */ + case SEND_DIAGNOSTIC: /* SPC - SELF-TEST Code */ + case VERIFY: /* SBC - VRProtect */ + case VERIFY_16: /* SBC - VRProtect */ + case WRITE_VERIFY: /* SBC - VRProtect */ + case WRITE_VERIFY_12: /* SBC - VRProtect */ + case MAINTENANCE_IN: /* SPC - Parameter Data Format for SA RTPG */ + break; + default: + cdb[1] &= 0x1f; /* clear logical unit number */ + break; + } + + /* + * For REPORT LUNS we always need to emulate the response, for everything + * else, pass it up. + */ + if (cdb[0] == REPORT_LUNS) { + cmd->execute_cmd = spc_emulate_report_luns; + return TCM_NO_SENSE; + } + + /* Set DATA_CDB flag for ops that should have it */ + switch (cdb[0]) { + case READ_6: + case READ_10: + case READ_12: + case READ_16: + case WRITE_6: + case WRITE_10: + case WRITE_12: + case WRITE_16: + case WRITE_VERIFY: + case WRITE_VERIFY_12: + case 0x8e: /* WRITE_VERIFY_16 */ + case COMPARE_AND_WRITE: + case XDWRITEREAD_10: + cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; + break; + case VARIABLE_LENGTH_CMD: + switch (get_unaligned_be16(&cdb[8])) { + case READ_32: + case WRITE_32: + case 0x0c: /* WRITE_VERIFY_32 */ + case XDWRITEREAD_32: + cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; + break; + } + } + + cmd->execute_cmd = exec_cmd; + + return TCM_NO_SENSE; +} +EXPORT_SYMBOL(passthrough_parse_cdb); |