diff options
Diffstat (limited to 'drivers/target/target_core_device.c')
-rw-r--r-- | drivers/target/target_core_device.c | 179 |
1 files changed, 29 insertions, 150 deletions
diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 1e4485b1849d..8485e9a789fc 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -120,8 +120,8 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) (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_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; @@ -309,7 +309,6 @@ int core_enable_device_list_for_node( struct se_node_acl *nacl, struct se_portal_group *tpg) { - struct se_port *port = lun->lun_sep; struct se_dev_entry *orig, *new; new = kzalloc(sizeof(*new), GFP_KERNEL); @@ -320,8 +319,8 @@ int core_enable_device_list_for_node( atomic_set(&new->ua_count, 0); spin_lock_init(&new->ua_lock); - INIT_LIST_HEAD(&new->alua_port_list); INIT_LIST_HEAD(&new->ua_list); + INIT_LIST_HEAD(&new->lun_link); new->mapped_lun = mapped_lun; kref_init(&new->pr_kref); @@ -357,10 +356,10 @@ int core_enable_device_list_for_node( hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); mutex_unlock(&nacl->lun_entry_mutex); - spin_lock_bh(&port->sep_alua_lock); - list_del(&orig->alua_port_list); - list_add_tail(&new->alua_port_list, &port->sep_alua_list); - spin_unlock_bh(&port->sep_alua_lock); + spin_lock_bh(&lun->lun_deve_lock); + list_del(&orig->lun_link); + list_add_tail(&new->lun_link, &lun->lun_deve_list); + spin_unlock_bh(&lun->lun_deve_lock); kref_put(&orig->pr_kref, target_pr_kref_release); wait_for_completion(&orig->pr_comp); @@ -374,9 +373,9 @@ int core_enable_device_list_for_node( hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); mutex_unlock(&nacl->lun_entry_mutex); - spin_lock_bh(&port->sep_alua_lock); - list_add_tail(&new->alua_port_list, &port->sep_alua_list); - spin_unlock_bh(&port->sep_alua_lock); + spin_lock_bh(&lun->lun_deve_lock); + list_add_tail(&new->lun_link, &lun->lun_deve_list); + spin_unlock_bh(&lun->lun_deve_lock); return 0; } @@ -390,23 +389,22 @@ void core_disable_device_list_for_node( struct se_node_acl *nacl, struct se_portal_group *tpg) { - struct se_port *port = lun->lun_sep; /* * If the MappedLUN entry is being disabled, the entry in - * port->sep_alua_list must be removed now before clearing the + * lun->lun_deve_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 + * struct se_lun_acl, but we remove deve->lun_link from + * lun->lun_deve_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(&orig->alua_port_list); - spin_unlock_bh(&port->sep_alua_lock); + spin_lock_bh(&lun->lun_deve_lock); + list_del(&orig->lun_link); + spin_unlock_bh(&lun->lun_deve_lock); /* * Disable struct se_dev_entry LUN ACL mapping */ @@ -458,27 +456,16 @@ void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg) mutex_unlock(&tpg->acl_node_mutex); } -static struct se_port *core_alloc_port(struct se_device *dev) +int core_alloc_rtpi(struct se_lun *lun, 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); + struct se_lun *tmp; spin_lock(&dev->se_port_lock); - if (dev->dev_port_count == 0x0000ffff) { + if (dev->export_count == 0x0000ffff) { pr_warn("Reached dev->dev_port_count ==" " 0x0000ffff\n"); spin_unlock(&dev->se_port_lock); - return ERR_PTR(-ENOSPC); + return -ENOSPC; } again: /* @@ -493,135 +480,23 @@ again: * 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) + lun->lun_rtpi = dev->dev_rpti_counter++; + if (!lun->lun_rtpi) goto again; - list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) { + list_for_each_entry(tmp, &dev->dev_sep_list, lun_dev_link) { /* * Make sure RELATIVE TARGET PORT IDENTIFIER is unique * for 16-bit wrap.. */ - if (port->sep_rtpi == port_tmp->sep_rtpi) + if (lun->lun_rtpi == tmp->lun_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_index = dev->dev_index; - lun->lun_se_dev = dev; - lun->lun_rtpi = port->sep_rtpi; - - 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; @@ -783,10 +658,10 @@ int core_dev_add_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_portal_group *tpg = lun->lun_tpg; struct se_node_acl *nacl; struct se_dev_entry *deve; @@ -930,6 +805,10 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) xcopy_lun->lun_se_dev = dev; spin_lock_init(&xcopy_lun->lun_sep_lock); init_completion(&xcopy_lun->lun_ref_comp); + INIT_LIST_HEAD(&xcopy_lun->lun_deve_list); + INIT_LIST_HEAD(&xcopy_lun->lun_dev_link); + mutex_init(&xcopy_lun->lun_tg_pt_md_mutex); + xcopy_lun->lun_tpg = &xcopy_pt_tpg; return dev; } |