1c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger/******************************************************************************* 2c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Filename: target_core_tmr.c 3c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 4c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * This file contains SPC-3 task management infrastructure 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 <linux/list.h> 29c53181af838fb9d82eebbb62b7175b0466d5a7a0Paul Gortmaker#include <linux/export.h> 30c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <scsi/scsi.h> 31c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <scsi/scsi_cmnd.h> 32c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 33c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <target/target_core_base.h> 34c4795fb20edf2fe2c862c8fe9f8b681edeb79ac1Christoph Hellwig#include <target/target_core_backend.h> 35c4795fb20edf2fe2c862c8fe9f8b681edeb79ac1Christoph Hellwig#include <target/target_core_fabric.h> 36c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include <target/target_core_configfs.h> 37c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 38e26d99aed42ec6cdc9540d19c77ac5d4dd2c5b00Christoph Hellwig#include "target_core_internal.h" 39c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include "target_core_alua.h" 40c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger#include "target_core_pr.h" 41c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 42c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Groverint core_tmr_alloc_req( 43c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_cmd *se_cmd, 44c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger void *fabric_tmr_ptr, 45dd503a5fcc0dfb8b5fd887bd967b6f431176864bRoland Dreier u8 function, 46dd503a5fcc0dfb8b5fd887bd967b6f431176864bRoland Dreier gfp_t gfp_flags) 47c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 48c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_tmr_req *tmr; 49c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 50c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover tmr = kzalloc(sizeof(struct se_tmr_req), gfp_flags); 516708bb27bb2703da238f21f516034263348af5beAndy Grover if (!tmr) { 526708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to allocate struct se_tmr_req\n"); 53c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover return -ENOMEM; 54c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 55c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover 56c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover se_cmd->se_cmd_flags |= SCF_SCSI_TMR_CDB; 57c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover se_cmd->se_tmr_req = tmr; 58c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger tmr->task_cmd = se_cmd; 59c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger tmr->fabric_tmr_ptr = fabric_tmr_ptr; 60c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger tmr->function = function; 61c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger INIT_LIST_HEAD(&tmr->tmr_list); 62c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 63c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover return 0; 64c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 65c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas BellingerEXPORT_SYMBOL(core_tmr_alloc_req); 66c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 678f83269048628d7b139dacbfc6cc97befcbdd2e9Joern Engelvoid core_tmr_release_req(struct se_tmr_req *tmr) 68c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 69c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_device *dev = tmr->tmr_dev; 70d050ffb922c782f092234611b9019e95024481abNicholas Bellinger unsigned long flags; 71c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 728f83269048628d7b139dacbfc6cc97befcbdd2e9Joern Engel if (dev) { 738f83269048628d7b139dacbfc6cc97befcbdd2e9Joern Engel spin_lock_irqsave(&dev->se_tmr_lock, flags); 748f83269048628d7b139dacbfc6cc97befcbdd2e9Joern Engel list_del(&tmr->tmr_list); 758f83269048628d7b139dacbfc6cc97befcbdd2e9Joern Engel spin_unlock_irqrestore(&dev->se_tmr_lock, flags); 767fd29aa920273b70be50c14c4b7e2213fb6623ceNicholas Bellinger } 777fd29aa920273b70be50c14c4b7e2213fb6623ceNicholas Bellinger 78c8e31f26feeb03dc6f51bff68135cc58431e099bAndy Grover kfree(tmr); 79c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 80c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 81c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellingerstatic void core_tmr_handle_tas_abort( 82c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_node_acl *tmr_nacl, 83c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_cmd *cmd, 84c1c35d52251b0941a72b0cdb862e85f0eba6b1bbNicholas Bellinger int tas) 85c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 8668259b5aac13a57cba797b9605ed9812158f0e72Alex Leung bool remove = true; 87c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 88c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * TASK ABORTED status (TAS) bit support 898f83269048628d7b139dacbfc6cc97befcbdd2e9Joern Engel */ 908f83269048628d7b139dacbfc6cc97befcbdd2e9Joern Engel if ((tmr_nacl && (tmr_nacl != cmd->se_sess->se_node_acl)) && tas) { 9168259b5aac13a57cba797b9605ed9812158f0e72Alex Leung remove = false; 92c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger transport_send_task_abort(cmd); 9368259b5aac13a57cba797b9605ed9812158f0e72Alex Leung } 94c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 9568259b5aac13a57cba797b9605ed9812158f0e72Alex Leung transport_cmd_finish_abort(cmd, remove); 96c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 97c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 98feae85644f1460b3373ef5141183ee43e6191b58Jörn Engelstatic int target_check_cdb_and_preempt(struct list_head *list, 99feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel struct se_cmd *cmd) 100c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel{ 101feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel struct t10_pr_registration *reg; 102c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel 103feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel if (!list) 104feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel return 0; 105feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel list_for_each_entry(reg, list, pr_reg_abort_list) { 106feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel if (reg->pr_res_key == cmd->pr_res_key) 107c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel return 0; 108c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel } 109c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel 110c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel return 1; 111c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel} 112c165f69c2ccbbb4ecf16c5d29d65922286bf62ffJörn Engel 1133d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellingervoid core_tmr_abort_task( 1143d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger struct se_device *dev, 1153d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger struct se_tmr_req *tmr, 1163d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger struct se_session *se_sess) 1173d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger{ 118f81ccb489a7a641c1bed41b49cf8d72c199c68d5Joern Engel struct se_cmd *se_cmd; 1193d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger unsigned long flags; 1203d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger int ref_tag; 1213d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1223d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); 123f81ccb489a7a641c1bed41b49cf8d72c199c68d5Joern Engel list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { 1243d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1253d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger if (dev != se_cmd->se_dev) 1263d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger continue; 12747b1584c1c95f0bb4d646c47de1c0455bb5cef54Alex Leung 12847b1584c1c95f0bb4d646c47de1c0455bb5cef54Alex Leung /* skip se_cmd associated with tmr */ 12947b1584c1c95f0bb4d646c47de1c0455bb5cef54Alex Leung if (tmr->task_cmd == se_cmd) 13047b1584c1c95f0bb4d646c47de1c0455bb5cef54Alex Leung continue; 13147b1584c1c95f0bb4d646c47de1c0455bb5cef54Alex Leung 1323d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger ref_tag = se_cmd->se_tfo->get_task_tag(se_cmd); 1333d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger if (tmr->ref_task_tag != ref_tag) 1343d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger continue; 1353d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1363d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger printk("ABORT_TASK: Found referenced %s task_tag: %u\n", 1373d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger se_cmd->se_tfo->get_fabric_name(), ref_tag); 1383d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 139ab74b3d62f05192bf8fb8f169e7999d1183b2e08Steve Hodgson spin_lock(&se_cmd->t_state_lock); 1403d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger if (se_cmd->transport_state & CMD_T_COMPLETE) { 1413d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger printk("ABORT_TASK: ref_tag: %u already complete, skipping\n", ref_tag); 142ab74b3d62f05192bf8fb8f169e7999d1183b2e08Steve Hodgson spin_unlock(&se_cmd->t_state_lock); 1433d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 1443d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger goto out; 1453d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger } 1463d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger se_cmd->transport_state |= CMD_T_ABORTED; 147ab74b3d62f05192bf8fb8f169e7999d1183b2e08Steve Hodgson spin_unlock(&se_cmd->t_state_lock); 1483d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1493d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger list_del_init(&se_cmd->se_cmd_list); 1503d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger kref_get(&se_cmd->cmd_kref); 1513d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 1523d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1533d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger cancel_work_sync(&se_cmd->work); 1543d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger transport_wait_for_tasks(se_cmd); 1553d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1563d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger target_put_sess_cmd(se_sess, se_cmd); 15768259b5aac13a57cba797b9605ed9812158f0e72Alex Leung transport_cmd_finish_abort(se_cmd, true); 1583d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1593d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger printk("ABORT_TASK: Sending TMR_FUNCTION_COMPLETE for" 1603d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger " ref_tag: %d\n", ref_tag); 1613d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger tmr->response = TMR_FUNCTION_COMPLETE; 1623d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger return; 1633d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger } 1643d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); 1653d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 1663d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellingerout: 1673d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger printk("ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: %d\n", 1683d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger tmr->ref_task_tag); 1693d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger tmr->response = TMR_TASK_DOES_NOT_EXIST; 1703d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger} 1713d28934aaae5e924afedf0f5cb42e1316514da6bNicholas Bellinger 172d050ffb922c782f092234611b9019e95024481abNicholas Bellingerstatic void core_tmr_drain_tmr_list( 173c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_device *dev, 174c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_tmr_req *tmr, 175d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct list_head *preempt_and_abort_list) 176c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger{ 177d050ffb922c782f092234611b9019e95024481abNicholas Bellinger LIST_HEAD(drain_tmr_list); 178c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger struct se_tmr_req *tmr_p, *tmr_pp; 179d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_cmd *cmd; 180c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger unsigned long flags; 181c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 182c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Release all pending and outgoing TMRs aside from the received 183c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * LUN_RESET tmr.. 184c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 185d050ffb922c782f092234611b9019e95024481abNicholas Bellinger spin_lock_irqsave(&dev->se_tmr_lock, flags); 186c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { 187c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 188c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Allow the received TMR to return with FUNCTION_COMPLETE. 189c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 190abc1fd4f92d86168790a9eaf9834713a41da788eJoern Engel if (tmr_p == tmr) 191c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger continue; 192c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 193c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger cmd = tmr_p->task_cmd; 1946708bb27bb2703da238f21f516034263348af5beAndy Grover if (!cmd) { 1956708bb27bb2703da238f21f516034263348af5beAndy Grover pr_err("Unable to locate struct se_cmd for TMR\n"); 196c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger continue; 197c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 198c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 199c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * If this function was called with a valid pr_res_key 200c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * parameter (eg: for PROUT PREEMPT_AND_ABORT service action 201c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * skip non regisration key matching TMRs. 202c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 203feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd)) 204c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger continue; 205c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 206d050ffb922c782f092234611b9019e95024481abNicholas Bellinger spin_lock(&cmd->t_state_lock); 2077d680f3b74dd6f0f57569eeeee8c257790ceaa96Christoph Hellwig if (!(cmd->transport_state & CMD_T_ACTIVE)) { 208d050ffb922c782f092234611b9019e95024481abNicholas Bellinger spin_unlock(&cmd->t_state_lock); 209c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger continue; 210c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 211c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { 212d050ffb922c782f092234611b9019e95024481abNicholas Bellinger spin_unlock(&cmd->t_state_lock); 213c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger continue; 214c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 215d050ffb922c782f092234611b9019e95024481abNicholas Bellinger spin_unlock(&cmd->t_state_lock); 216d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 2176eb40b2af4908e9aee71e43e7a384243128c56ddJoern Engel list_move_tail(&tmr_p->tmr_list, &drain_tmr_list); 218d050ffb922c782f092234611b9019e95024481abNicholas Bellinger } 219d050ffb922c782f092234611b9019e95024481abNicholas Bellinger spin_unlock_irqrestore(&dev->se_tmr_lock, flags); 220d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 221abc1fd4f92d86168790a9eaf9834713a41da788eJoern Engel list_for_each_entry_safe(tmr_p, tmr_pp, &drain_tmr_list, tmr_list) { 222b8a11d7399173dcf23b6d0ca4f416bdf1eba982eJoern Engel list_del_init(&tmr_p->tmr_list); 223abc1fd4f92d86168790a9eaf9834713a41da788eJoern Engel cmd = tmr_p->task_cmd; 224d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 2256708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x," 226c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger " Response: 0x%02x, t_state: %d\n", 227abc1fd4f92d86168790a9eaf9834713a41da788eJoern Engel (preempt_and_abort_list) ? "Preempt" : "", tmr_p, 228abc1fd4f92d86168790a9eaf9834713a41da788eJoern Engel tmr_p->function, tmr_p->response, cmd->t_state); 229c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 2308dc52b54207f361f7abf6cbe26f5199ae8b7cf23Nicholas Bellinger transport_cmd_finish_abort(cmd, 1); 231c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 232d050ffb922c782f092234611b9019e95024481abNicholas Bellinger} 233d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 234cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwigstatic void core_tmr_drain_state_list( 235d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_device *dev, 236d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_cmd *prout_cmd, 237d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_node_acl *tmr_nacl, 238d050ffb922c782f092234611b9019e95024481abNicholas Bellinger int tas, 239d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct list_head *preempt_and_abort_list) 240d050ffb922c782f092234611b9019e95024481abNicholas Bellinger{ 241d050ffb922c782f092234611b9019e95024481abNicholas Bellinger LIST_HEAD(drain_task_list); 242cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig struct se_cmd *cmd, *next; 243d050ffb922c782f092234611b9019e95024481abNicholas Bellinger unsigned long flags; 244cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig 245c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 246cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig * Complete outstanding commands with TASK_ABORTED SAM status. 247cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig * 248c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * This is following sam4r17, section 5.6 Aborting commands, Table 38 249c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * for TMR LUN_RESET: 250c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 251c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * a) "Yes" indicates that each command that is aborted on an I_T nexus 252c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * other than the one that caused the SCSI device condition is 253c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * completed with TASK ABORTED status, if the TAS bit is set to one in 254c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * the Control mode page (see SPC-4). "No" indicates that no status is 255c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * returned for aborted commands. 256c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 257c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * d) If the logical unit reset is caused by a particular I_T nexus 258c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" 259c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * (TASK_ABORTED status) applies. 260c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 261c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Otherwise (e.g., if triggered by a hard reset), "no" 262c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * (no TASK_ABORTED SAM status) applies. 263c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * 264c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Note that this seems to be independent of TAS (Task Aborted Status) 265c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * in the Control Mode Page. 266c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 267c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock_irqsave(&dev->execute_task_lock, flags); 268cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig list_for_each_entry_safe(cmd, next, &dev->state_list, state_list) { 269c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 270c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * For PREEMPT_AND_ABORT usage, only process commands 271c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * with a matching reservation key. 272c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 273feae85644f1460b3373ef5141183ee43e6191b58Jörn Engel if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd)) 274c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger continue; 275cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig 276c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 277c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Not aborting PROUT PREEMPT_AND_ABORT CDB.. 278c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 279c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger if (prout_cmd == cmd) 280c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger continue; 281c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 282cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig list_move_tail(&cmd->state_list, &drain_task_list); 283cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig cmd->state_active = false; 284d050ffb922c782f092234611b9019e95024481abNicholas Bellinger } 285d050ffb922c782f092234611b9019e95024481abNicholas Bellinger spin_unlock_irqrestore(&dev->execute_task_lock, flags); 286d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 287d050ffb922c782f092234611b9019e95024481abNicholas Bellinger while (!list_empty(&drain_task_list)) { 288cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig cmd = list_entry(drain_task_list.next, struct se_cmd, state_list); 289cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig list_del(&cmd->state_list); 290c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 291cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig pr_debug("LUN_RESET: %s cmd: %p" 292f2da9dbdb54f2e9fa00dd01af6ff2ab06b4d90b7Christoph Hellwig " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state: %d" 293f2da9dbdb54f2e9fa00dd01af6ff2ab06b4d90b7Christoph Hellwig "cdb: 0x%02x\n", 294cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig (preempt_and_abort_list) ? "Preempt" : "", cmd, 295e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover cmd->se_tfo->get_task_tag(cmd), 0, 296e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, 297f2da9dbdb54f2e9fa00dd01af6ff2ab06b4d90b7Christoph Hellwig cmd->t_task_cdb[0]); 2986708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" 299785fdf70b2b46588c973ad8b65ed62871994452fChristoph Hellwig " -- CMD_T_ACTIVE: %d" 3007d680f3b74dd6f0f57569eeeee8c257790ceaa96Christoph Hellwig " CMD_T_STOP: %d CMD_T_SENT: %d\n", 301e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key, 3027d680f3b74dd6f0f57569eeeee8c257790ceaa96Christoph Hellwig (cmd->transport_state & CMD_T_ACTIVE) != 0, 3037d680f3b74dd6f0f57569eeeee8c257790ceaa96Christoph Hellwig (cmd->transport_state & CMD_T_STOP) != 0, 3047d680f3b74dd6f0f57569eeeee8c257790ceaa96Christoph Hellwig (cmd->transport_state & CMD_T_SENT) != 0); 305c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 30635e0e757537b9239172e35db773dd062727fd612Christoph Hellwig /* 30735e0e757537b9239172e35db773dd062727fd612Christoph Hellwig * If the command may be queued onto a workqueue cancel it now. 30835e0e757537b9239172e35db773dd062727fd612Christoph Hellwig * 30935e0e757537b9239172e35db773dd062727fd612Christoph Hellwig * This is equivalent to removal from the execute queue in the 31035e0e757537b9239172e35db773dd062727fd612Christoph Hellwig * loop above, but we do it down here given that 31135e0e757537b9239172e35db773dd062727fd612Christoph Hellwig * cancel_work_sync may block. 31235e0e757537b9239172e35db773dd062727fd612Christoph Hellwig */ 31335e0e757537b9239172e35db773dd062727fd612Christoph Hellwig if (cmd->t_state == TRANSPORT_COMPLETE) 31435e0e757537b9239172e35db773dd062727fd612Christoph Hellwig cancel_work_sync(&cmd->work); 31535e0e757537b9239172e35db773dd062727fd612Christoph Hellwig 316cdbb70bb4c17dad0ee23a357030021892a0f60f0Christoph Hellwig spin_lock_irqsave(&cmd->t_state_lock, flags); 317cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig target_stop_cmd(cmd, &flags); 318c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 3197d680f3b74dd6f0f57569eeeee8c257790ceaa96Christoph Hellwig cmd->transport_state |= CMD_T_ABORTED; 320a1d8b49abd60ba5d09e7c968731abcb0f8f1cbf6Andy Grover spin_unlock_irqrestore(&cmd->t_state_lock, flags); 321c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 322c1c35d52251b0941a72b0cdb862e85f0eba6b1bbNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas); 323c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 324d050ffb922c782f092234611b9019e95024481abNicholas Bellinger} 325d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 326d050ffb922c782f092234611b9019e95024481abNicholas Bellingerint core_tmr_lun_reset( 327d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_device *dev, 328d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_tmr_req *tmr, 329d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct list_head *preempt_and_abort_list, 330d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_cmd *prout_cmd) 331d050ffb922c782f092234611b9019e95024481abNicholas Bellinger{ 332d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_node_acl *tmr_nacl = NULL; 333d050ffb922c782f092234611b9019e95024481abNicholas Bellinger struct se_portal_group *tmr_tpg = NULL; 334d050ffb922c782f092234611b9019e95024481abNicholas Bellinger int tas; 335d050ffb922c782f092234611b9019e95024481abNicholas Bellinger /* 336d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * TASK_ABORTED status bit, this is configurable via ConfigFS 337d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * struct se_device attributes. spc4r17 section 7.4.6 Control mode page 338d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * 339d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * A task aborted status (TAS) bit set to zero specifies that aborted 340d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * tasks shall be terminated by the device server without any response 341d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * to the application client. A TAS bit set to one specifies that tasks 342d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * aborted by the actions of an I_T nexus other than the I_T nexus on 343d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * which the command was received shall be completed with TASK ABORTED 344d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * status (see SAM-4). 345d050ffb922c782f092234611b9019e95024481abNicholas Bellinger */ 3460fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig tas = dev->dev_attrib.emulate_tas; 347d050ffb922c782f092234611b9019e95024481abNicholas Bellinger /* 348d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * Determine if this se_tmr is coming from a $FABRIC_MOD 349d050ffb922c782f092234611b9019e95024481abNicholas Bellinger * or struct se_device passthrough.. 350d050ffb922c782f092234611b9019e95024481abNicholas Bellinger */ 351d050ffb922c782f092234611b9019e95024481abNicholas Bellinger if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { 352d050ffb922c782f092234611b9019e95024481abNicholas Bellinger tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; 353d050ffb922c782f092234611b9019e95024481abNicholas Bellinger tmr_tpg = tmr->task_cmd->se_sess->se_tpg; 354d050ffb922c782f092234611b9019e95024481abNicholas Bellinger if (tmr_nacl && tmr_tpg) { 355d050ffb922c782f092234611b9019e95024481abNicholas Bellinger pr_debug("LUN_RESET: TMR caller fabric: %s" 356d050ffb922c782f092234611b9019e95024481abNicholas Bellinger " initiator port %s\n", 357d050ffb922c782f092234611b9019e95024481abNicholas Bellinger tmr_tpg->se_tpg_tfo->get_fabric_name(), 358d050ffb922c782f092234611b9019e95024481abNicholas Bellinger tmr_nacl->initiatorname); 359d050ffb922c782f092234611b9019e95024481abNicholas Bellinger } 360d050ffb922c782f092234611b9019e95024481abNicholas Bellinger } 361d050ffb922c782f092234611b9019e95024481abNicholas Bellinger pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n", 362d050ffb922c782f092234611b9019e95024481abNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 363d050ffb922c782f092234611b9019e95024481abNicholas Bellinger dev->transport->name, tas); 364d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 365d050ffb922c782f092234611b9019e95024481abNicholas Bellinger core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list); 366cf572a9627c9ae86082216de109780c1d2e2ee28Christoph Hellwig core_tmr_drain_state_list(dev, prout_cmd, tmr_nacl, tas, 367d050ffb922c782f092234611b9019e95024481abNicholas Bellinger preempt_and_abort_list); 368af8772926f019b7bddd7477b8de5f3b0f12bad21Christoph Hellwig 369c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger /* 370c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * Clear any legacy SPC-2 reservation when called during 371c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger * LOGICAL UNIT RESET 372c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger */ 3736708bb27bb2703da238f21f516034263348af5beAndy Grover if (!preempt_and_abort_list && 3740fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)) { 375c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_lock(&dev->dev_reservation_lock); 376c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger dev->dev_reserved_node_acl = NULL; 3770fd97ccf45be26fb01b3a412f1f6c6b5044b2f16Christoph Hellwig dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; 378c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 3796708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("LUN_RESET: SCSI-2 Released reservation\n"); 380c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger } 381c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 382ee480683d975973e3ff679850871e00e011c4a96Nicholas Bellinger atomic_long_inc(&dev->num_resets); 383c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger 3846708bb27bb2703da238f21f516034263348af5beAndy Grover pr_debug("LUN_RESET: %s for [%s] Complete\n", 385c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 386e3d6f909ed803d92a5ac9b4a2c087e0eae9b90d0Andy Grover dev->transport->name); 387c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger return 0; 388c66ac9db8d4ad9994a02b3e933ea2ccc643e1fe5Nicholas Bellinger} 389d050ffb922c782f092234611b9019e95024481abNicholas Bellinger 390