diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/target/target_core_device.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/target/target_core_device.c')
-rw-r--r-- | kernel/drivers/target/target_core_device.c | 1382 |
1 files changed, 352 insertions, 1030 deletions
diff --git a/kernel/drivers/target/target_core_device.c b/kernel/drivers/target/target_core_device.c index ce5f76818..3436a8356 100644 --- a/kernel/drivers/target/target_core_device.c +++ b/kernel/drivers/target/target_core_device.c @@ -36,8 +36,8 @@ #include <asm/unaligned.h> #include <net/sock.h> #include <net/tcp.h> -#include <scsi/scsi.h> -#include <scsi/scsi_device.h> +#include <scsi/scsi_common.h> +#include <scsi/scsi_proto.h> #include <target/target_core_base.h> #include <target/target_core_backend.h> @@ -56,48 +56,47 @@ static struct se_hba *lun0_hba; struct se_device *g_lun0_dev; sense_reason_t -transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) +transport_lookup_cmd_lun(struct se_cmd *se_cmd, u64 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++; + struct se_node_acl *nacl = se_sess->se_node_acl; + struct se_dev_entry *deve; + sense_reason_t ret = TCM_NO_SENSE; - 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; - } + rcu_read_lock(); + deve = target_nacl_find_deve(nacl, unpacked_lun); + if (deve) { + atomic_long_inc(&deve->total_cmds); if (se_cmd->data_direction == DMA_TO_DEVICE) - deve->write_bytes += se_cmd->data_length; + atomic_long_add(se_cmd->data_length, + &deve->write_bytes); else if (se_cmd->data_direction == DMA_FROM_DEVICE) - deve->read_bytes += se_cmd->data_length; + atomic_long_add(se_cmd->data_length, + &deve->read_bytes); - se_lun = deve->se_lun; - se_cmd->se_lun = deve->se_lun; + se_lun = rcu_dereference(deve->se_lun); + se_cmd->se_lun = rcu_dereference(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; + + 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%08llx\n", + se_cmd->se_tfo->get_fabric_name(), + unpacked_lun); + rcu_read_unlock(); + ret = TCM_WRITE_PROTECTED; + goto ref_dev; + } } - spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags); + rcu_read_unlock(); if (!se_lun) { /* @@ -107,76 +106,82 @@ transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun) */ if (unpacked_lun != 0) { pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" - " Access for 0x%08x\n", + " Access for 0x%08llx\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_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; + /* + * Force WRITE PROTECT for virtual LUN 0 + */ + if ((se_cmd->data_direction != DMA_FROM_DEVICE) && + (se_cmd->data_direction != DMA_NONE)) { + ret = TCM_WRITE_PROTECTED; + goto ref_dev; + } + } + /* + * RCU reference protected by percpu se_lun->lun_ref taken above that + * must drop to zero (including initial reference) before this se_lun + * pointer can be kfree_rcu() by the final se_lun->lun_group put via + * target_core_fabric_configfs.c:target_fabric_port_release + */ +ref_dev: + se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); + atomic_long_inc(&se_cmd->se_dev->num_cmds); - 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); + atomic_long_add(se_cmd->data_length, + &se_cmd->se_dev->write_bytes); else if (se_cmd->data_direction == DMA_FROM_DEVICE) - atomic_long_add(se_cmd->data_length, &dev->read_bytes); + atomic_long_add(se_cmd->data_length, + &se_cmd->se_dev->read_bytes); - return 0; + return ret; } EXPORT_SYMBOL(transport_lookup_cmd_lun); -int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) +int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u64 unpacked_lun) { struct se_dev_entry *deve; struct se_lun *se_lun = NULL; struct se_session *se_sess = se_cmd->se_sess; + struct se_node_acl *nacl = se_sess->se_node_acl; 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; + rcu_read_lock(); + deve = target_nacl_find_deve(nacl, unpacked_lun); + if (deve) { + se_tmr->tmr_lun = rcu_dereference(deve->se_lun); + se_cmd->se_lun = rcu_dereference(deve->se_lun); + se_lun = rcu_dereference(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); + rcu_read_unlock(); if (!se_lun) { pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN" - " Access for 0x%08x\n", + " Access for 0x%08llx\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; + /* + * XXX: Add percpu se_lun->lun_ref reference count for TMR + */ + se_cmd->se_dev = rcu_dereference_raw(se_lun->lun_se_dev); + se_tmr->tmr_dev = rcu_dereference_raw(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); @@ -186,9 +191,24 @@ int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun) } EXPORT_SYMBOL(transport_lookup_tmr_lun); +bool target_lun_is_rdonly(struct se_cmd *cmd) +{ + struct se_session *se_sess = cmd->se_sess; + struct se_dev_entry *deve; + bool ret; + + rcu_read_lock(); + deve = target_nacl_find_deve(se_sess->se_node_acl, cmd->orig_fe_lun); + ret = (deve && deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY); + rcu_read_unlock(); + + return ret; +} +EXPORT_SYMBOL(target_lun_is_rdonly); + /* * 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 + * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_kref * when a matching rtpi is found. */ struct se_dev_entry *core_get_se_deve_from_rtpi( @@ -197,231 +217,239 @@ struct se_dev_entry *core_get_se_deve_from_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; + rcu_read_lock(); + hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { + lun = rcu_dereference(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) + if (lun->lun_rtpi != rtpi) continue; - atomic_inc_mb(&deve->pr_ref_count); - spin_unlock_irq(&nacl->device_list_lock); + kref_get(&deve->pr_kref); + rcu_read_unlock(); return deve; } - spin_unlock_irq(&nacl->device_list_lock); + rcu_read_unlock(); return NULL; } -int core_free_device_list_for_node( +void 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); + mutex_lock(&nacl->lun_entry_mutex); + hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { + struct se_lun *lun = rcu_dereference_check(deve->se_lun, + lockdep_is_held(&nacl->lun_entry_mutex)); + core_disable_device_list_for_node(lun, deve, nacl, tpg); } - spin_unlock_irq(&nacl->device_list_lock); - - array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG); - nacl->device_list = NULL; - - return 0; + mutex_unlock(&nacl->lun_entry_mutex); } void core_update_device_list_access( - u32 mapped_lun, + u64 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; + mutex_lock(&nacl->lun_entry_mutex); + deve = target_nacl_find_deve(nacl, mapped_lun); + if (deve) { + 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); + mutex_unlock(&nacl->lun_entry_mutex); } -/* core_enable_device_list_for_node(): - * - * +/* + * Called with rcu_read_lock or nacl->device_list_lock held. */ +struct se_dev_entry *target_nacl_find_deve(struct se_node_acl *nacl, u64 mapped_lun) +{ + struct se_dev_entry *deve; + + hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) + if (deve->mapped_lun == mapped_lun) + return deve; + + return NULL; +} +EXPORT_SYMBOL(target_nacl_find_deve); + +void target_pr_kref_release(struct kref *kref) +{ + struct se_dev_entry *deve = container_of(kref, struct se_dev_entry, + pr_kref); + complete(&deve->pr_comp); +} + +static void +target_luns_data_has_changed(struct se_node_acl *nacl, struct se_dev_entry *new, + bool skip_new) +{ + struct se_dev_entry *tmp; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp, &nacl->lun_entry_hlist, link) { + if (skip_new && tmp == new) + continue; + core_scsi3_ua_allocate(tmp, 0x3F, + ASCQ_3FH_REPORTED_LUNS_DATA_HAS_CHANGED); + } + rcu_read_unlock(); +} + int core_enable_device_list_for_node( struct se_lun *lun, struct se_lun_acl *lun_acl, - u32 mapped_lun, + u64 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); + struct se_dev_entry *orig, *new; + + new = kzalloc(sizeof(*new), GFP_KERNEL); + if (!new) { + pr_err("Unable to allocate se_dev_entry memory\n"); + return -ENOMEM; + } + + atomic_set(&new->ua_count, 0); + spin_lock_init(&new->ua_lock); + INIT_LIST_HEAD(&new->ua_list); + INIT_LIST_HEAD(&new->lun_link); + + new->mapped_lun = mapped_lun; + kref_init(&new->pr_kref); + init_completion(&new->pr_comp); + + if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) + new->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE; + else + new->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY; + + new->creation_time = get_jiffies_64(); + new->attach_count++; + + mutex_lock(&nacl->lun_entry_mutex); + orig = target_nacl_find_deve(nacl, mapped_lun); + if (orig && orig->se_lun) { + struct se_lun *orig_lun = rcu_dereference_check(orig->se_lun, + lockdep_is_held(&nacl->lun_entry_mutex)); + + if (orig_lun != lun) { + pr_err("Existing orig->se_lun doesn't match new lun" + " for dynamic -> explicit NodeACL conversion:" + " %s\n", nacl->initiatorname); + mutex_unlock(&nacl->lun_entry_mutex); + kfree(new); return -EINVAL; } - deve->se_lun_acl = lun_acl; + BUG_ON(orig->se_lun_acl != NULL); - 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; - } + rcu_assign_pointer(new->se_lun, lun); + rcu_assign_pointer(new->se_lun_acl, lun_acl); + hlist_del_rcu(&orig->link); + hlist_add_head_rcu(&new->link, &nacl->lun_entry_hlist); + mutex_unlock(&nacl->lun_entry_mutex); - spin_unlock_irq(&nacl->device_list_lock); - return 0; - } + spin_lock(&lun->lun_deve_lock); + list_del(&orig->lun_link); + list_add_tail(&new->lun_link, &lun->lun_deve_list); + spin_unlock(&lun->lun_deve_lock); - 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; + kref_put(&orig->pr_kref, target_pr_kref_release); + wait_for_completion(&orig->pr_comp); + + target_luns_data_has_changed(nacl, new, true); + kfree_rcu(orig, rcu_head); + return 0; } - deve->creation_time = get_jiffies_64(); - deve->attach_count++; - spin_unlock_irq(&nacl->device_list_lock); + rcu_assign_pointer(new->se_lun, lun); + rcu_assign_pointer(new->se_lun_acl, lun_acl); + 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(&deve->alua_port_list, &port->sep_alua_list); - spin_unlock_bh(&port->sep_alua_lock); + spin_lock(&lun->lun_deve_lock); + list_add_tail(&new->lun_link, &lun->lun_deve_list); + spin_unlock(&lun->lun_deve_lock); + target_luns_data_has_changed(nacl, new, true); return 0; } -/* core_disable_device_list_for_node(): - * - * +/* + * Called with se_node_acl->lun_entry_mutex held. */ -int core_disable_device_list_for_node( +void core_disable_device_list_for_node( struct se_lun *lun, - struct se_lun_acl *lun_acl, - u32 mapped_lun, - u32 lun_access, + struct se_dev_entry *orig, 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]; - + /* + * rcu_dereference_raw protected by se_lun->lun_group symlink + * reference to se_device->dev_group. + */ + struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); /* * 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(&deve->alua_port_list); - spin_unlock_bh(&port->sep_alua_lock); + spin_lock(&lun->lun_deve_lock); + list_del(&orig->lun_link); + spin_unlock(&lun->lun_deve_lock); /* - * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE - * PR operation to complete. + * Disable struct se_dev_entry LUN ACL mapping */ - while (atomic_read(&deve->pr_ref_count) != 0) - cpu_relax(); + core_scsi3_ua_release_all(orig); - spin_lock_irq(&nacl->device_list_lock); + hlist_del_rcu(&orig->link); + clear_bit(DEF_PR_REG_ACTIVE, &orig->deve_flags); + orig->lun_flags = 0; + orig->creation_time = 0; + orig->attach_count--; /* - * Disable struct se_dev_entry LUN ACL mapping + * Before firing off RCU callback, wait for any in process SPEC_I_PT=1 + * or REGISTER_AND_MOVE PR operation to complete. */ - 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; + kref_put(&orig->pr_kref, target_pr_kref_release); + wait_for_completion(&orig->pr_comp); + + rcu_assign_pointer(orig->se_lun, NULL); + rcu_assign_pointer(orig->se_lun_acl, NULL); + + kfree_rcu(orig, rcu_head); + + core_scsi3_free_pr_reg_from_nacl(dev, nacl); + target_luns_data_has_changed(nacl, NULL, false); } /* core_clear_lun_from_tpg(): @@ -432,53 +460,35 @@ 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); + mutex_lock(&tpg->acl_node_mutex); 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); + mutex_lock(&nacl->lun_entry_mutex); + hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { + struct se_lun *tmp_lun = rcu_dereference_check(deve->se_lun, + lockdep_is_held(&nacl->lun_entry_mutex)); - core_disable_device_list_for_node(lun, NULL, - deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS, - nacl, tpg); + if (lun != tmp_lun) + continue; - spin_lock_irq(&nacl->device_list_lock); + core_disable_device_list_for_node(lun, deve, nacl, tpg); } - spin_unlock_irq(&nacl->device_list_lock); - - spin_lock_irq(&tpg->acl_node_lock); + mutex_unlock(&nacl->lun_entry_mutex); } - spin_unlock_irq(&tpg->acl_node_lock); + 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: /* @@ -493,133 +503,23 @@ 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_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; @@ -651,556 +551,19 @@ static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size) 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( +int core_dev_add_lun( struct se_portal_group *tpg, struct se_device *dev, - u32 unpacked_lun) + struct se_lun *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); + return rc; - pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from" + pr_debug("%s_TPG[%u]_LUN[%llu] - 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); @@ -1210,20 +573,19 @@ struct se_lun *core_dev_add_lun( */ if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) { struct se_node_acl *acl; - spin_lock_irq(&tpg->acl_node_lock); + + mutex_lock(&tpg->acl_node_mutex); 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); + core_tpg_add_node_to_devs(acl, tpg, lun); } } - spin_unlock_irq(&tpg->acl_node_lock); + mutex_unlock(&tpg->acl_node_mutex); } - return lun; + return 0; } /* core_dev_del_lun(): @@ -1234,7 +596,7 @@ 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" + pr_debug("%s_TPG[%u]_LUN[%llu] - 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()); @@ -1242,72 +604,10 @@ void core_dev_del_lun( 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, + u64 mapped_lun, int *ret) { struct se_lun_acl *lacl; @@ -1325,11 +625,8 @@ struct se_lun_acl *core_dev_init_initiator_node_lun_acl( 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; } @@ -1337,22 +634,16 @@ struct se_lun_acl *core_dev_init_initiator_node_lun_acl( int core_dev_add_initiator_node_lun_acl( struct se_portal_group *tpg, struct se_lun_acl *lacl, - u32 unpacked_lun, + struct se_lun *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; - } + struct se_node_acl *nacl = lacl->se_lun_nacl; + /* + * rcu_dereference_raw protected by se_lun->lun_group symlink + * reference to se_device->dev_group. + */ + struct se_device *dev = rcu_dereference_raw(lun->lun_se_dev); - nacl = lacl->se_lun_nacl; if (!nacl) return -EINVAL; @@ -1366,55 +657,43 @@ int core_dev_add_initiator_node_lun_acl( 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 " + pr_debug("%s_TPG[%hu]_LUN[%llu->%llu] - 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, + tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, lacl->mapped_lun, (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO", - lacl->initiatorname); + nacl->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, + core_scsi3_check_aptpl_registration(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_portal_group *tpg = lun->lun_tpg; struct se_node_acl *nacl; + struct se_dev_entry *deve; 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; + mutex_lock(&nacl->lun_entry_mutex); + deve = target_nacl_find_deve(nacl, lacl->mapped_lun); + if (deve) + core_disable_device_list_for_node(lun, deve, nacl, tpg); + mutex_unlock(&nacl->lun_entry_mutex); - pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for" - " InitiatorNode: %s Mapped LUN: %u\n", + pr_debug("%s_TPG[%hu]_LUN[%llu] - Removed ACL for" + " InitiatorNode: %s Mapped LUN: %llu\n", tpg->se_tpg_tfo->get_fabric_name(), tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun, - lacl->initiatorname, lacl->mapped_lun); + nacl->initiatorname, lacl->mapped_lun); return 0; } @@ -1424,10 +703,10 @@ void core_dev_free_initiator_node_lun_acl( 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(), + " Mapped LUN: %llu\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); + lacl->se_lun_nacl->initiatorname, lacl->mapped_lun); kfree(lacl); } @@ -1473,14 +752,15 @@ 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); + dev = hba->backend->ops->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); + dev->transport = hba->backend->ops; + dev->prot_length = sizeof(struct t10_pi_tuple); + dev->hba_index = hba->hba_index; INIT_LIST_HEAD(&dev->dev_list); INIT_LIST_HEAD(&dev->dev_sep_list); @@ -1496,7 +776,6 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 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); @@ -1513,9 +792,9 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 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_dpo = 1; + dev->dev_attrib.emulate_fua_write = 1; + dev->dev_attrib.emulate_fua_read = 1; 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; @@ -1537,16 +816,59 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name) 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); + rcu_assign_pointer(xcopy_lun->lun_se_dev, dev); 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; } +/* + * Check if the underlying struct block_device request_queue supports + * the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM + * in ATA and we need to set TPE=1 + */ +bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib, + struct request_queue *q, int block_size) +{ + if (!blk_queue_discard(q)) + return false; + + attrib->max_unmap_lba_count = (q->limits.max_discard_sectors << 9) / + block_size; + /* + * Currently hardcoded to 1 in Linux/SCSI code.. + */ + attrib->max_unmap_block_desc_count = 1; + attrib->unmap_granularity = q->limits.discard_granularity / block_size; + attrib->unmap_granularity_alignment = q->limits.discard_alignment / + block_size; + return true; +} +EXPORT_SYMBOL(target_configure_unmap_from_queue); + +/* + * Convert from blocksize advertised to the initiator to the 512 byte + * units unconditionally used by the Linux block layer. + */ +sector_t target_to_linux_sector(struct se_device *dev, sector_t lb) +{ + switch (dev->dev_attrib.block_size) { + case 4096: + return lb << 3; + case 2048: + return lb << 2; + case 1024: + return lb << 1; + default: + return lb; + } +} +EXPORT_SYMBOL(target_to_linux_sector); + int target_configure_device(struct se_device *dev) { struct se_hba *hba = dev->se_hba; @@ -1679,7 +1001,7 @@ int core_dev_setup_virtual_lun0(void) goto out_free_hba; } - hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf)); + hba->backend->ops->set_configfs_dev_params(dev, buf, sizeof(buf)); ret = target_configure_device(dev); if (ret) |