1c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger/******************************************************************************* 2c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Filename: target_core_ua.c 3c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 4c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * This file contains logic for SPC-3 Unit Attention emulation 5c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 64c76251e8e8f704ed7eace603a8041458a1ed16fNicholas Bellinger * (c) Copyright 2009-2013 Datera, Inc. 7c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 8c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 9c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 10c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * This program is free software; you can redistribute it and/or modify 11c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * it under the terms of the GNU General Public License as published by 12c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 13c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * (at your option) any later version. 14c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 15c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * This program is distributed in the hope that it will be useful, 16c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 17c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * GNU General Public License for more details. 19c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 20c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * You should have received a copy of the GNU General Public License 21c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * along with this program; if not, write to the Free Software 22c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 23c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 24c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger ******************************************************************************/ 25c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 26c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <linux/slab.h> 27c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <linux/spinlock.h> 28c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <scsi/scsi.h> 29c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <scsi/scsi_cmnd.h> 30c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 31c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <target/target_core_base.h> 32c4795fb20edf2fe2c862c8fe9f8b681edeb79ac1Christoph Hellwig#include <target/target_core_fabric.h> 33c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <target/target_core_configfs.h> 34c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 35e26d99aed42ec6cdc9540d19c77ac5d4dd2c5b00Christoph Hellwig#include "target_core_internal.h" 36c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include "target_core_alua.h" 37c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include "target_core_pr.h" 38c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include "target_core_ua.h" 39c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 40de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigsense_reason_t 41de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwigtarget_scsi3_ua_check(struct se_cmd *cmd) 42c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 43c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_dev_entry *deve; 44c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_session *sess = cmd->se_sess; 45c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_node_acl *nacl; 46c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 476708bb27bb2703da238f21f516034263348af5beAndy Grover if (!sess) 48c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 49c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 50c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger nacl = sess->se_node_acl; 516708bb27bb2703da238f21f516034263348af5beAndy Grover if (!nacl) 52c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 53c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 54f2083241f23722207676025abbb45a301d412e69Jörn Engel deve = nacl->device_list[cmd->orig_fe_lun]; 556708bb27bb2703da238f21f516034263348af5beAndy Grover if (!atomic_read(&deve->ua_count)) 56c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 57c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 58c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * From sam4r14, section 5.14 Unit attention condition: 59c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 60c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * a) if an INQUIRY command enters the enabled command state, the 61c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * device server shall process the INQUIRY command and shall neither 62c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * report nor clear any unit attention condition; 63c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * b) if a REPORT LUNS command enters the enabled command state, the 64c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * device server shall process the REPORT LUNS command and shall not 65c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * report any unit attention condition; 66c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * e) if a REQUEST SENSE command enters the enabled command state while 67c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * a unit attention condition exists for the SCSI initiator port 68c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * associated with the I_T nexus on which the REQUEST SENSE command 69c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * was received, then the device server shall process the command 70c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * and either: 71c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 72de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig switch (cmd->t_task_cdb[0]) { 73c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger case INQUIRY: 74c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger case REPORT_LUNS: 75c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger case REQUEST_SENSE: 76c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 77c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger default: 78de103c93aff0bed0ae984274e5dc8b95899badabChristoph Hellwig return TCM_CHECK_CONDITION_UNIT_ATTENTION; 79c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 80c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 81c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 82c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellingerint core_scsi3_ua_allocate( 83c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_node_acl *nacl, 84c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger u32 unpacked_lun, 85c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger u8 asc, 86c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger u8 ascq) 87c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 88c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_dev_entry *deve; 89c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_ua *ua, *ua_p, *ua_tmp; 90c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 91c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * PASSTHROUGH OPS 92c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 936708bb27bb2703da238f21f516034263348af5beAndy Grover if (!nacl) 94e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover return -EINVAL; 95c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 96c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC); 976708bb27bb2703da238f21f516034263348af5beAndy Grover if (!ua) { 986708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate struct se_ua\n"); 99e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover return -ENOMEM; 100c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 101c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger INIT_LIST_HEAD(&ua->ua_nacl_list); 102c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 103c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger ua->ua_nacl = nacl; 104c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger ua->ua_asc = asc; 105c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger ua->ua_ascq = ascq; 106c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 107c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock_irq(&nacl->device_list_lock); 108f2083241f23722207676025abbb45a301d412e69Jörn Engel deve = nacl->device_list[unpacked_lun]; 109c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 110c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock(&deve->ua_lock); 111c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) { 112c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 113c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Do not report the same UNIT ATTENTION twice.. 114c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 115c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) { 116c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock(&deve->ua_lock); 117c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock_irq(&nacl->device_list_lock); 118c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger kmem_cache_free(se_ua_cache, ua); 119c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 120c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 121c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 122c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Attach the highest priority Unit Attention to 123c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * the head of the list following sam4r14, 124c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Section 5.14 Unit Attention Condition: 125c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 126c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * POWER ON, RESET, OR BUS DEVICE RESET OCCURRED highest 127c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * POWER ON OCCURRED or 128c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * DEVICE INTERNAL RESET 129c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * SCSI BUS RESET OCCURRED or 130c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * MICROCODE HAS BEEN CHANGED or 131c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * protocol specific 132c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * BUS DEVICE RESET FUNCTION OCCURRED 133c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * I_T NEXUS LOSS OCCURRED 134c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * COMMANDS CLEARED BY POWER LOSS NOTIFICATION 135c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * all others Lowest 136c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 137c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Each of the ASCQ codes listed above are defined in 138c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * the 29h ASC family, see spc4r17 Table D.1 139c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 140c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if (ua_p->ua_asc == 0x29) { 141c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if ((asc == 0x29) && (ascq > ua_p->ua_ascq)) 142c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_add(&ua->ua_nacl_list, 143c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger &deve->ua_list); 144c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger else 145c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_add_tail(&ua->ua_nacl_list, 146c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger &deve->ua_list); 147c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } else if (ua_p->ua_asc == 0x2a) { 148c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 149c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Incoming Family 29h ASCQ codes will override 150c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Family 2AHh ASCQ codes for Unit Attention condition. 151c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 152c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if ((asc == 0x29) || (ascq > ua_p->ua_asc)) 153c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_add(&ua->ua_nacl_list, 154c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger &deve->ua_list); 155c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger else 156c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_add_tail(&ua->ua_nacl_list, 157c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger &deve->ua_list); 158c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } else 159c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_add_tail(&ua->ua_nacl_list, 160c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger &deve->ua_list); 161c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock(&deve->ua_lock); 162c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock_irq(&nacl->device_list_lock); 163c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 16433940d09937276cd3c81f2874faf43e37c2db0e2Joern Engel atomic_inc_mb(&deve->ua_count); 165c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 166c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 167c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_add_tail(&ua->ua_nacl_list, &deve->ua_list); 168c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock(&deve->ua_lock); 169c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock_irq(&nacl->device_list_lock); 170c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 1716708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("[%s]: Allocated UNIT ATTENTION, mapped LUN: %u, ASC:" 172c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger " 0x%02x, ASCQ: 0x%02x\n", 173e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover nacl->se_tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun, 174c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger asc, ascq); 175c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 17633940d09937276cd3c81f2874faf43e37c2db0e2Joern Engel atomic_inc_mb(&deve->ua_count); 177c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 178c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 179c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 180c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellingervoid core_scsi3_ua_release_all( 181c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_dev_entry *deve) 182c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 183c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_ua *ua, *ua_p; 184c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 185c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock(&deve->ua_lock); 186c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) { 187c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_del(&ua->ua_nacl_list); 188c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger kmem_cache_free(se_ua_cache, ua); 189c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 19033940d09937276cd3c81f2874faf43e37c2db0e2Joern Engel atomic_dec_mb(&deve->ua_count); 191c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 192c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock(&deve->ua_lock); 193c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 194c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 195c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellingervoid core_scsi3_ua_for_check_condition( 196c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_cmd *cmd, 197c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger u8 *asc, 198c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger u8 *ascq) 199c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 2005951146dea1ac8ff2f177477c907084d63913cadAndy Grover struct se_device *dev = cmd->se_dev; 201c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_dev_entry *deve; 202c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_session *sess = cmd->se_sess; 203c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_node_acl *nacl; 204c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_ua *ua = NULL, *ua_p; 205c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger int head = 1; 206c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 2076708bb27bb2703da238f21f516034263348af5beAndy Grover if (!sess) 208c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return; 209c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 210c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger nacl = sess->se_node_acl; 2116708bb27bb2703da238f21f516034263348af5beAndy Grover if (!nacl) 212c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return; 213c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 214c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock_irq(&nacl->device_list_lock); 215f2083241f23722207676025abbb45a301d412e69Jörn Engel deve = nacl->device_list[cmd->orig_fe_lun]; 2166708bb27bb2703da238f21f516034263348af5beAndy Grover if (!atomic_read(&deve->ua_count)) { 217c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock_irq(&nacl->device_list_lock); 218c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return; 219c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 220c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 221c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * The highest priority Unit Attentions are placed at the head of the 222c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * struct se_dev_entry->ua_list, and will be returned in CHECK_CONDITION + 223c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * sense data for the received CDB. 224c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 225c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock(&deve->ua_lock); 226c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) { 227c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 228c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * For ua_intlck_ctrl code not equal to 00b, only report the 229c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * highest priority UNIT_ATTENTION and ASC/ASCQ without 230c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * clearing it. 231c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 2320fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig if (dev->dev_attrib.emulate_ua_intlck_ctrl != 0) { 233c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger *asc = ua->ua_asc; 234c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger *ascq = ua->ua_ascq; 235c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger break; 236c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 237c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 238c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Otherwise for the default 00b, release the UNIT ATTENTION 23925985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * condition. Return the ASC/ASCQ of the highest priority UA 240c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * (head of the list) in the outgoing CHECK_CONDITION + sense. 241c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 242c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if (head) { 243c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger *asc = ua->ua_asc; 244c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger *ascq = ua->ua_ascq; 245c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger head = 0; 246c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 247c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_del(&ua->ua_nacl_list); 248c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger kmem_cache_free(se_ua_cache, ua); 249c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 25033940d09937276cd3c81f2874faf43e37c2db0e2Joern Engel atomic_dec_mb(&deve->ua_count); 251c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 252c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock(&deve->ua_lock); 253c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock_irq(&nacl->device_list_lock); 254c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 2556708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("[%s]: %s UNIT ATTENTION condition with" 256c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger " INTLCK_CTRL: %d, mapped LUN: %u, got CDB: 0x%02x" 257c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger " reported ASC: 0x%02x, ASCQ: 0x%02x\n", 258e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 2590fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig (dev->dev_attrib.emulate_ua_intlck_ctrl != 0) ? "Reporting" : 2600fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig "Releasing", dev->dev_attrib.emulate_ua_intlck_ctrl, 261a1d8b49abd60ba5d09e7c968731abcb0f8f1cbf6Andy Grover cmd->orig_fe_lun, cmd->t_task_cdb[0], *asc, *ascq); 262c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 263c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 264c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellingerint core_scsi3_ua_clear_for_request_sense( 265c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_cmd *cmd, 266c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger u8 *asc, 267c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger u8 *ascq) 268c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 269c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_dev_entry *deve; 270c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_session *sess = cmd->se_sess; 271c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_node_acl *nacl; 272c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_ua *ua = NULL, *ua_p; 273c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger int head = 1; 274c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 2756708bb27bb2703da238f21f516034263348af5beAndy Grover if (!sess) 276e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover return -EINVAL; 277c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 278c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger nacl = sess->se_node_acl; 2796708bb27bb2703da238f21f516034263348af5beAndy Grover if (!nacl) 280e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover return -EINVAL; 281c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 282c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock_irq(&nacl->device_list_lock); 283f2083241f23722207676025abbb45a301d412e69Jörn Engel deve = nacl->device_list[cmd->orig_fe_lun]; 2846708bb27bb2703da238f21f516034263348af5beAndy Grover if (!atomic_read(&deve->ua_count)) { 285c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock_irq(&nacl->device_list_lock); 286e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover return -EPERM; 287c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 288c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 289c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * The highest priority Unit Attentions are placed at the head of the 290c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * struct se_dev_entry->ua_list. The First (and hence highest priority) 291c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * ASC/ASCQ will be returned in REQUEST_SENSE payload data for the 292c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * matching struct se_lun. 293c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 294c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Once the returning ASC/ASCQ values are set, we go ahead and 29525985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * release all of the Unit Attention conditions for the associated 296c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * struct se_lun. 297c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 298c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock(&deve->ua_lock); 299c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) { 300c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if (head) { 301c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger *asc = ua->ua_asc; 302c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger *ascq = ua->ua_ascq; 303c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger head = 0; 304c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 305c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_del(&ua->ua_nacl_list); 306c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger kmem_cache_free(se_ua_cache, ua); 307c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 30833940d09937276cd3c81f2874faf43e37c2db0e2Joern Engel atomic_dec_mb(&deve->ua_count); 309c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 310c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock(&deve->ua_lock); 311c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock_irq(&nacl->device_list_lock); 312c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 3136708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("[%s]: Released UNIT ATTENTION condition, mapped" 314c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger " LUN: %u, got REQUEST_SENSE reported ASC: 0x%02x," 315e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover " ASCQ: 0x%02x\n", nacl->se_tpg->se_tpg_tfo->get_fabric_name(), 316c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger cmd->orig_fe_lun, *asc, *ascq); 317c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 318e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover return (head) ? -EPERM : 0; 319c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 320