diff options
Diffstat (limited to 'drivers/target/target_core_ua.c')
| -rw-r--r-- | drivers/target/target_core_ua.c | 81 |
1 files changed, 50 insertions, 31 deletions
diff --git a/drivers/target/target_core_ua.c b/drivers/target/target_core_ua.c index e44cc94b12cb..be25eb807a5f 100644 --- a/drivers/target/target_core_ua.c +++ b/drivers/target/target_core_ua.c @@ -29,7 +29,6 @@ #include <target/target_core_base.h> #include <target/target_core_fabric.h> -#include <target/target_core_configfs.h> #include "target_core_internal.h" #include "target_core_alua.h" @@ -50,9 +49,17 @@ target_scsi3_ua_check(struct se_cmd *cmd) if (!nacl) return 0; - deve = nacl->device_list[cmd->orig_fe_lun]; - if (!atomic_read(&deve->ua_count)) + rcu_read_lock(); + deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); + if (!deve) { + rcu_read_unlock(); return 0; + } + if (!atomic_read(&deve->ua_count)) { + rcu_read_unlock(); + return 0; + } + rcu_read_unlock(); /* * From sam4r14, section 5.14 Unit attention condition: * @@ -79,18 +86,11 @@ target_scsi3_ua_check(struct se_cmd *cmd) } int core_scsi3_ua_allocate( - struct se_node_acl *nacl, - u32 unpacked_lun, + struct se_dev_entry *deve, u8 asc, u8 ascq) { - struct se_dev_entry *deve; struct se_ua *ua, *ua_p, *ua_tmp; - /* - * PASSTHROUGH OPS - */ - if (!nacl) - return -EINVAL; ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC); if (!ua) { @@ -99,13 +99,9 @@ int core_scsi3_ua_allocate( } INIT_LIST_HEAD(&ua->ua_nacl_list); - ua->ua_nacl = nacl; ua->ua_asc = asc; ua->ua_ascq = ascq; - spin_lock_irq(&nacl->device_list_lock); - deve = nacl->device_list[unpacked_lun]; - spin_lock(&deve->ua_lock); list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) { /* @@ -113,7 +109,6 @@ int core_scsi3_ua_allocate( */ if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) { spin_unlock(&deve->ua_lock); - spin_unlock_irq(&nacl->device_list_lock); kmem_cache_free(se_ua_cache, ua); return 0; } @@ -158,24 +153,40 @@ int core_scsi3_ua_allocate( list_add_tail(&ua->ua_nacl_list, &deve->ua_list); spin_unlock(&deve->ua_lock); - spin_unlock_irq(&nacl->device_list_lock); atomic_inc_mb(&deve->ua_count); return 0; } list_add_tail(&ua->ua_nacl_list, &deve->ua_list); spin_unlock(&deve->ua_lock); - spin_unlock_irq(&nacl->device_list_lock); - pr_debug("[%s]: Allocated UNIT ATTENTION, mapped LUN: %u, ASC:" - " 0x%02x, ASCQ: 0x%02x\n", - nacl->se_tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, + pr_debug("Allocated UNIT ATTENTION, mapped LUN: %llu, ASC:" + " 0x%02x, ASCQ: 0x%02x\n", deve->mapped_lun, asc, ascq); atomic_inc_mb(&deve->ua_count); return 0; } +void target_ua_allocate_lun(struct se_node_acl *nacl, + u32 unpacked_lun, u8 asc, u8 ascq) +{ + struct se_dev_entry *deve; + + if (!nacl) + return; + + rcu_read_lock(); + deve = target_nacl_find_deve(nacl, unpacked_lun); + if (!deve) { + rcu_read_unlock(); + return; + } + + core_scsi3_ua_allocate(deve, asc, ascq); + rcu_read_unlock(); +} + void core_scsi3_ua_release_all( struct se_dev_entry *deve) { @@ -210,10 +221,14 @@ void core_scsi3_ua_for_check_condition( if (!nacl) return; - spin_lock_irq(&nacl->device_list_lock); - deve = nacl->device_list[cmd->orig_fe_lun]; + rcu_read_lock(); + deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); + if (!deve) { + rcu_read_unlock(); + return; + } if (!atomic_read(&deve->ua_count)) { - spin_unlock_irq(&nacl->device_list_lock); + rcu_read_unlock(); return; } /* @@ -249,10 +264,10 @@ void core_scsi3_ua_for_check_condition( atomic_dec_mb(&deve->ua_count); } spin_unlock(&deve->ua_lock); - spin_unlock_irq(&nacl->device_list_lock); + rcu_read_unlock(); pr_debug("[%s]: %s UNIT ATTENTION condition with" - " INTLCK_CTRL: %d, mapped LUN: %u, got CDB: 0x%02x" + " INTLCK_CTRL: %d, mapped LUN: %llu, got CDB: 0x%02x" " reported ASC: 0x%02x, ASCQ: 0x%02x\n", nacl->se_tpg->se_tpg_tfo->get_fabric_name(), (dev->dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" : @@ -278,10 +293,14 @@ int core_scsi3_ua_clear_for_request_sense( if (!nacl) return -EINVAL; - spin_lock_irq(&nacl->device_list_lock); - deve = nacl->device_list[cmd->orig_fe_lun]; + rcu_read_lock(); + deve = target_nacl_find_deve(nacl, cmd->orig_fe_lun); + if (!deve) { + rcu_read_unlock(); + return -EINVAL; + } if (!atomic_read(&deve->ua_count)) { - spin_unlock_irq(&nacl->device_list_lock); + rcu_read_unlock(); return -EPERM; } /* @@ -307,10 +326,10 @@ int core_scsi3_ua_clear_for_request_sense( atomic_dec_mb(&deve->ua_count); } spin_unlock(&deve->ua_lock); - spin_unlock_irq(&nacl->device_list_lock); + rcu_read_unlock(); pr_debug("[%s]: Released UNIT ATTENTION condition, mapped" - " LUN: %u, got REQUEST_SENSE reported ASC: 0x%02x," + " LUN: %llu, got REQUEST_SENSE reported ASC: 0x%02x," " ASCQ: 0x%02x\n", nacl->se_tpg->se_tpg_tfo->get_fabric_name(), cmd->orig_fe_lun, *asc, *ascq); |