1c66ac9dbSNicholas Bellinger /******************************************************************************* 2c66ac9dbSNicholas Bellinger * Filename: target_core_tmr.c 3c66ac9dbSNicholas Bellinger * 4c66ac9dbSNicholas Bellinger * This file contains SPC-3 task management infrastructure 5c66ac9dbSNicholas Bellinger * 6c66ac9dbSNicholas Bellinger * Copyright (c) 2009,2010 Rising Tide Systems 7c66ac9dbSNicholas Bellinger * Copyright (c) 2009,2010 Linux-iSCSI.org 8c66ac9dbSNicholas Bellinger * 9c66ac9dbSNicholas Bellinger * Nicholas A. Bellinger <nab@kernel.org> 10c66ac9dbSNicholas Bellinger * 11c66ac9dbSNicholas Bellinger * This program is free software; you can redistribute it and/or modify 12c66ac9dbSNicholas Bellinger * it under the terms of the GNU General Public License as published by 13c66ac9dbSNicholas Bellinger * the Free Software Foundation; either version 2 of the License, or 14c66ac9dbSNicholas Bellinger * (at your option) any later version. 15c66ac9dbSNicholas Bellinger * 16c66ac9dbSNicholas Bellinger * This program is distributed in the hope that it will be useful, 17c66ac9dbSNicholas Bellinger * but WITHOUT ANY WARRANTY; without even the implied warranty of 18c66ac9dbSNicholas Bellinger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19c66ac9dbSNicholas Bellinger * GNU General Public License for more details. 20c66ac9dbSNicholas Bellinger * 21c66ac9dbSNicholas Bellinger * You should have received a copy of the GNU General Public License 22c66ac9dbSNicholas Bellinger * along with this program; if not, write to the Free Software 23c66ac9dbSNicholas Bellinger * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 24c66ac9dbSNicholas Bellinger * 25c66ac9dbSNicholas Bellinger ******************************************************************************/ 26c66ac9dbSNicholas Bellinger 27c66ac9dbSNicholas Bellinger #include <linux/version.h> 28c66ac9dbSNicholas Bellinger #include <linux/slab.h> 29c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 30c66ac9dbSNicholas Bellinger #include <linux/list.h> 31c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 32c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 33c66ac9dbSNicholas Bellinger 34c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 35c66ac9dbSNicholas Bellinger #include <target/target_core_device.h> 36c66ac9dbSNicholas Bellinger #include <target/target_core_tmr.h> 37c66ac9dbSNicholas Bellinger #include <target/target_core_transport.h> 38c66ac9dbSNicholas Bellinger #include <target/target_core_fabric_ops.h> 39c66ac9dbSNicholas Bellinger #include <target/target_core_configfs.h> 40c66ac9dbSNicholas Bellinger 41c66ac9dbSNicholas Bellinger #include "target_core_alua.h" 42c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 43c66ac9dbSNicholas Bellinger 44c66ac9dbSNicholas Bellinger #define DEBUG_LUN_RESET 45c66ac9dbSNicholas Bellinger #ifdef DEBUG_LUN_RESET 46c66ac9dbSNicholas Bellinger #define DEBUG_LR(x...) printk(KERN_INFO x) 47c66ac9dbSNicholas Bellinger #else 48c66ac9dbSNicholas Bellinger #define DEBUG_LR(x...) 49c66ac9dbSNicholas Bellinger #endif 50c66ac9dbSNicholas Bellinger 51c66ac9dbSNicholas Bellinger struct se_tmr_req *core_tmr_alloc_req( 52c66ac9dbSNicholas Bellinger struct se_cmd *se_cmd, 53c66ac9dbSNicholas Bellinger void *fabric_tmr_ptr, 54c66ac9dbSNicholas Bellinger u8 function) 55c66ac9dbSNicholas Bellinger { 56c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr; 57c66ac9dbSNicholas Bellinger 58c66ac9dbSNicholas Bellinger tmr = kmem_cache_zalloc(se_tmr_req_cache, GFP_KERNEL); 59c66ac9dbSNicholas Bellinger if (!(tmr)) { 60c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to allocate struct se_tmr_req\n"); 61c66ac9dbSNicholas Bellinger return ERR_PTR(-ENOMEM); 62c66ac9dbSNicholas Bellinger } 63c66ac9dbSNicholas Bellinger tmr->task_cmd = se_cmd; 64c66ac9dbSNicholas Bellinger tmr->fabric_tmr_ptr = fabric_tmr_ptr; 65c66ac9dbSNicholas Bellinger tmr->function = function; 66c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tmr->tmr_list); 67c66ac9dbSNicholas Bellinger 68c66ac9dbSNicholas Bellinger return tmr; 69c66ac9dbSNicholas Bellinger } 70c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(core_tmr_alloc_req); 71c66ac9dbSNicholas Bellinger 72c66ac9dbSNicholas Bellinger void core_tmr_release_req( 73c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr) 74c66ac9dbSNicholas Bellinger { 75c66ac9dbSNicholas Bellinger struct se_device *dev = tmr->tmr_dev; 76c66ac9dbSNicholas Bellinger 77c66ac9dbSNicholas Bellinger spin_lock(&dev->se_tmr_lock); 78c66ac9dbSNicholas Bellinger list_del(&tmr->tmr_list); 79c66ac9dbSNicholas Bellinger kmem_cache_free(se_tmr_req_cache, tmr); 80c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_tmr_lock); 81c66ac9dbSNicholas Bellinger } 82c66ac9dbSNicholas Bellinger 83c66ac9dbSNicholas Bellinger static void core_tmr_handle_tas_abort( 84c66ac9dbSNicholas Bellinger struct se_node_acl *tmr_nacl, 85c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 86c66ac9dbSNicholas Bellinger int tas, 87c66ac9dbSNicholas Bellinger int fe_count) 88c66ac9dbSNicholas Bellinger { 89c66ac9dbSNicholas Bellinger if (!(fe_count)) { 90c66ac9dbSNicholas Bellinger transport_cmd_finish_abort(cmd, 1); 91c66ac9dbSNicholas Bellinger return; 92c66ac9dbSNicholas Bellinger } 93c66ac9dbSNicholas Bellinger /* 94c66ac9dbSNicholas Bellinger * TASK ABORTED status (TAS) bit support 95c66ac9dbSNicholas Bellinger */ 96c66ac9dbSNicholas Bellinger if (((tmr_nacl != NULL) && 97c66ac9dbSNicholas Bellinger (tmr_nacl == cmd->se_sess->se_node_acl)) || tas) 98c66ac9dbSNicholas Bellinger transport_send_task_abort(cmd); 99c66ac9dbSNicholas Bellinger 100c66ac9dbSNicholas Bellinger transport_cmd_finish_abort(cmd, 0); 101c66ac9dbSNicholas Bellinger } 102c66ac9dbSNicholas Bellinger 103c66ac9dbSNicholas Bellinger int core_tmr_lun_reset( 104c66ac9dbSNicholas Bellinger struct se_device *dev, 105c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr, 106c66ac9dbSNicholas Bellinger struct list_head *preempt_and_abort_list, 107c66ac9dbSNicholas Bellinger struct se_cmd *prout_cmd) 108c66ac9dbSNicholas Bellinger { 109c66ac9dbSNicholas Bellinger struct se_cmd *cmd; 110c66ac9dbSNicholas Bellinger struct se_queue_req *qr, *qr_tmp; 111c66ac9dbSNicholas Bellinger struct se_node_acl *tmr_nacl = NULL; 112c66ac9dbSNicholas Bellinger struct se_portal_group *tmr_tpg = NULL; 113c66ac9dbSNicholas Bellinger struct se_queue_obj *qobj = dev->dev_queue_obj; 114c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr_p, *tmr_pp; 115c66ac9dbSNicholas Bellinger struct se_task *task, *task_tmp; 116c66ac9dbSNicholas Bellinger unsigned long flags; 117c66ac9dbSNicholas Bellinger int fe_count, state, tas; 118c66ac9dbSNicholas Bellinger /* 119c66ac9dbSNicholas Bellinger * TASK_ABORTED status bit, this is configurable via ConfigFS 120c66ac9dbSNicholas Bellinger * struct se_device attributes. spc4r17 section 7.4.6 Control mode page 121c66ac9dbSNicholas Bellinger * 122c66ac9dbSNicholas Bellinger * A task aborted status (TAS) bit set to zero specifies that aborted 123c66ac9dbSNicholas Bellinger * tasks shall be terminated by the device server without any response 124c66ac9dbSNicholas Bellinger * to the application client. A TAS bit set to one specifies that tasks 125c66ac9dbSNicholas Bellinger * aborted by the actions of an I_T nexus other than the I_T nexus on 126c66ac9dbSNicholas Bellinger * which the command was received shall be completed with TASK ABORTED 127c66ac9dbSNicholas Bellinger * status (see SAM-4). 128c66ac9dbSNicholas Bellinger */ 129c66ac9dbSNicholas Bellinger tas = DEV_ATTRIB(dev)->emulate_tas; 130c66ac9dbSNicholas Bellinger /* 131c66ac9dbSNicholas Bellinger * Determine if this se_tmr is coming from a $FABRIC_MOD 132c66ac9dbSNicholas Bellinger * or struct se_device passthrough.. 133c66ac9dbSNicholas Bellinger */ 134c66ac9dbSNicholas Bellinger if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { 135c66ac9dbSNicholas Bellinger tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; 136c66ac9dbSNicholas Bellinger tmr_tpg = tmr->task_cmd->se_sess->se_tpg; 137c66ac9dbSNicholas Bellinger if (tmr_nacl && tmr_tpg) { 138c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: TMR caller fabric: %s" 139c66ac9dbSNicholas Bellinger " initiator port %s\n", 140c66ac9dbSNicholas Bellinger TPG_TFO(tmr_tpg)->get_fabric_name(), 141c66ac9dbSNicholas Bellinger tmr_nacl->initiatorname); 142c66ac9dbSNicholas Bellinger } 143c66ac9dbSNicholas Bellinger } 144c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: %s starting for [%s], tas: %d\n", 145c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 146c66ac9dbSNicholas Bellinger TRANSPORT(dev)->name, tas); 147c66ac9dbSNicholas Bellinger /* 148c66ac9dbSNicholas Bellinger * Release all pending and outgoing TMRs aside from the received 149c66ac9dbSNicholas Bellinger * LUN_RESET tmr.. 150c66ac9dbSNicholas Bellinger */ 151c66ac9dbSNicholas Bellinger spin_lock(&dev->se_tmr_lock); 152c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { 153c66ac9dbSNicholas Bellinger /* 154c66ac9dbSNicholas Bellinger * Allow the received TMR to return with FUNCTION_COMPLETE. 155c66ac9dbSNicholas Bellinger */ 156c66ac9dbSNicholas Bellinger if (tmr && (tmr_p == tmr)) 157c66ac9dbSNicholas Bellinger continue; 158c66ac9dbSNicholas Bellinger 159c66ac9dbSNicholas Bellinger cmd = tmr_p->task_cmd; 160c66ac9dbSNicholas Bellinger if (!(cmd)) { 161c66ac9dbSNicholas Bellinger printk(KERN_ERR "Unable to locate struct se_cmd for TMR\n"); 162c66ac9dbSNicholas Bellinger continue; 163c66ac9dbSNicholas Bellinger } 164c66ac9dbSNicholas Bellinger /* 165c66ac9dbSNicholas Bellinger * If this function was called with a valid pr_res_key 166c66ac9dbSNicholas Bellinger * parameter (eg: for PROUT PREEMPT_AND_ABORT service action 167c66ac9dbSNicholas Bellinger * skip non regisration key matching TMRs. 168c66ac9dbSNicholas Bellinger */ 169c66ac9dbSNicholas Bellinger if ((preempt_and_abort_list != NULL) && 170c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 171c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 172c66ac9dbSNicholas Bellinger continue; 173c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_tmr_lock); 174c66ac9dbSNicholas Bellinger 175c66ac9dbSNicholas Bellinger spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags); 176c66ac9dbSNicholas Bellinger if (!(atomic_read(&T_TASK(cmd)->t_transport_active))) { 177c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags); 178c66ac9dbSNicholas Bellinger spin_lock(&dev->se_tmr_lock); 179c66ac9dbSNicholas Bellinger continue; 180c66ac9dbSNicholas Bellinger } 181c66ac9dbSNicholas Bellinger if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { 182c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags); 183c66ac9dbSNicholas Bellinger spin_lock(&dev->se_tmr_lock); 184c66ac9dbSNicholas Bellinger continue; 185c66ac9dbSNicholas Bellinger } 186c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: %s releasing TMR %p Function: 0x%02x," 187c66ac9dbSNicholas Bellinger " Response: 0x%02x, t_state: %d\n", 188c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "", tmr_p, 189c66ac9dbSNicholas Bellinger tmr_p->function, tmr_p->response, cmd->t_state); 190c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags); 191c66ac9dbSNicholas Bellinger 192c66ac9dbSNicholas Bellinger transport_cmd_finish_abort_tmr(cmd); 193c66ac9dbSNicholas Bellinger spin_lock(&dev->se_tmr_lock); 194c66ac9dbSNicholas Bellinger } 195c66ac9dbSNicholas Bellinger spin_unlock(&dev->se_tmr_lock); 196c66ac9dbSNicholas Bellinger /* 197c66ac9dbSNicholas Bellinger * Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status. 198c66ac9dbSNicholas Bellinger * This is following sam4r17, section 5.6 Aborting commands, Table 38 199c66ac9dbSNicholas Bellinger * for TMR LUN_RESET: 200c66ac9dbSNicholas Bellinger * 201c66ac9dbSNicholas Bellinger * a) "Yes" indicates that each command that is aborted on an I_T nexus 202c66ac9dbSNicholas Bellinger * other than the one that caused the SCSI device condition is 203c66ac9dbSNicholas Bellinger * completed with TASK ABORTED status, if the TAS bit is set to one in 204c66ac9dbSNicholas Bellinger * the Control mode page (see SPC-4). "No" indicates that no status is 205c66ac9dbSNicholas Bellinger * returned for aborted commands. 206c66ac9dbSNicholas Bellinger * 207c66ac9dbSNicholas Bellinger * d) If the logical unit reset is caused by a particular I_T nexus 208c66ac9dbSNicholas Bellinger * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" 209c66ac9dbSNicholas Bellinger * (TASK_ABORTED status) applies. 210c66ac9dbSNicholas Bellinger * 211c66ac9dbSNicholas Bellinger * Otherwise (e.g., if triggered by a hard reset), "no" 212c66ac9dbSNicholas Bellinger * (no TASK_ABORTED SAM status) applies. 213c66ac9dbSNicholas Bellinger * 214c66ac9dbSNicholas Bellinger * Note that this seems to be independent of TAS (Task Aborted Status) 215c66ac9dbSNicholas Bellinger * in the Control Mode Page. 216c66ac9dbSNicholas Bellinger */ 217c66ac9dbSNicholas Bellinger spin_lock_irqsave(&dev->execute_task_lock, flags); 218c66ac9dbSNicholas Bellinger list_for_each_entry_safe(task, task_tmp, &dev->state_task_list, 219c66ac9dbSNicholas Bellinger t_state_list) { 220c66ac9dbSNicholas Bellinger if (!(TASK_CMD(task))) { 221c66ac9dbSNicholas Bellinger printk(KERN_ERR "TASK_CMD(task) is NULL!\n"); 222c66ac9dbSNicholas Bellinger continue; 223c66ac9dbSNicholas Bellinger } 224c66ac9dbSNicholas Bellinger cmd = TASK_CMD(task); 225c66ac9dbSNicholas Bellinger 226c66ac9dbSNicholas Bellinger if (!T_TASK(cmd)) { 227c66ac9dbSNicholas Bellinger printk(KERN_ERR "T_TASK(cmd) is NULL for task: %p cmd:" 228c66ac9dbSNicholas Bellinger " %p ITT: 0x%08x\n", task, cmd, 229c66ac9dbSNicholas Bellinger CMD_TFO(cmd)->get_task_tag(cmd)); 230c66ac9dbSNicholas Bellinger continue; 231c66ac9dbSNicholas Bellinger } 232c66ac9dbSNicholas Bellinger /* 233c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT usage, only process commands 234c66ac9dbSNicholas Bellinger * with a matching reservation key. 235c66ac9dbSNicholas Bellinger */ 236c66ac9dbSNicholas Bellinger if ((preempt_and_abort_list != NULL) && 237c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 238c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 239c66ac9dbSNicholas Bellinger continue; 240c66ac9dbSNicholas Bellinger /* 241c66ac9dbSNicholas Bellinger * Not aborting PROUT PREEMPT_AND_ABORT CDB.. 242c66ac9dbSNicholas Bellinger */ 243c66ac9dbSNicholas Bellinger if (prout_cmd == cmd) 244c66ac9dbSNicholas Bellinger continue; 245c66ac9dbSNicholas Bellinger 246c66ac9dbSNicholas Bellinger list_del(&task->t_state_list); 247c66ac9dbSNicholas Bellinger atomic_set(&task->task_state_active, 0); 248c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&dev->execute_task_lock, flags); 249c66ac9dbSNicholas Bellinger 250c66ac9dbSNicholas Bellinger spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags); 251c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: %s cmd: %p task: %p" 252c66ac9dbSNicholas Bellinger " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/" 253c66ac9dbSNicholas Bellinger "def_t_state: %d/%d cdb: 0x%02x\n", 254c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "", cmd, task, 255c66ac9dbSNicholas Bellinger CMD_TFO(cmd)->get_task_tag(cmd), 0, 256c66ac9dbSNicholas Bellinger CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state, 257c66ac9dbSNicholas Bellinger cmd->deferred_t_state, T_TASK(cmd)->t_task_cdb[0]); 258c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" 259c66ac9dbSNicholas Bellinger " t_task_cdbs: %d t_task_cdbs_left: %d" 260c66ac9dbSNicholas Bellinger " t_task_cdbs_sent: %d -- t_transport_active: %d" 261c66ac9dbSNicholas Bellinger " t_transport_stop: %d t_transport_sent: %d\n", 262c66ac9dbSNicholas Bellinger CMD_TFO(cmd)->get_task_tag(cmd), cmd->pr_res_key, 263c66ac9dbSNicholas Bellinger T_TASK(cmd)->t_task_cdbs, 264c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_task_cdbs_left), 265c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_task_cdbs_sent), 266c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_transport_active), 267c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_transport_stop), 268c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_transport_sent)); 269c66ac9dbSNicholas Bellinger 270c66ac9dbSNicholas Bellinger if (atomic_read(&task->task_active)) { 271c66ac9dbSNicholas Bellinger atomic_set(&task->task_stop, 1); 272c66ac9dbSNicholas Bellinger spin_unlock_irqrestore( 273c66ac9dbSNicholas Bellinger &T_TASK(cmd)->t_state_lock, flags); 274c66ac9dbSNicholas Bellinger 275c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: Waiting for task: %p to shutdown" 276c66ac9dbSNicholas Bellinger " for dev: %p\n", task, dev); 277c66ac9dbSNicholas Bellinger wait_for_completion(&task->task_stop_comp); 278c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET Completed task: %p shutdown for" 279c66ac9dbSNicholas Bellinger " dev: %p\n", task, dev); 280c66ac9dbSNicholas Bellinger spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags); 281c66ac9dbSNicholas Bellinger atomic_dec(&T_TASK(cmd)->t_task_cdbs_left); 282c66ac9dbSNicholas Bellinger 283c66ac9dbSNicholas Bellinger atomic_set(&task->task_active, 0); 284c66ac9dbSNicholas Bellinger atomic_set(&task->task_stop, 0); 285c66ac9dbSNicholas Bellinger } 286c66ac9dbSNicholas Bellinger __transport_stop_task_timer(task, &flags); 287c66ac9dbSNicholas Bellinger 288c66ac9dbSNicholas Bellinger if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_ex_left))) { 289c66ac9dbSNicholas Bellinger spin_unlock_irqrestore( 290c66ac9dbSNicholas Bellinger &T_TASK(cmd)->t_state_lock, flags); 291c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: Skipping task: %p, dev: %p for" 292c66ac9dbSNicholas Bellinger " t_task_cdbs_ex_left: %d\n", task, dev, 293c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_task_cdbs_ex_left)); 294c66ac9dbSNicholas Bellinger 295c66ac9dbSNicholas Bellinger spin_lock_irqsave(&dev->execute_task_lock, flags); 296c66ac9dbSNicholas Bellinger continue; 297c66ac9dbSNicholas Bellinger } 298c66ac9dbSNicholas Bellinger fe_count = atomic_read(&T_TASK(cmd)->t_fe_count); 299c66ac9dbSNicholas Bellinger 300c66ac9dbSNicholas Bellinger if (atomic_read(&T_TASK(cmd)->t_transport_active)) { 301c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: got t_transport_active = 1 for" 302c66ac9dbSNicholas Bellinger " task: %p, t_fe_count: %d dev: %p\n", task, 303c66ac9dbSNicholas Bellinger fe_count, dev); 304c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, 305c66ac9dbSNicholas Bellinger flags); 306c66ac9dbSNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); 307c66ac9dbSNicholas Bellinger 308c66ac9dbSNicholas Bellinger spin_lock_irqsave(&dev->execute_task_lock, flags); 309c66ac9dbSNicholas Bellinger continue; 310c66ac9dbSNicholas Bellinger } 311c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: Got t_transport_active = 0 for task: %p," 312c66ac9dbSNicholas Bellinger " t_fe_count: %d dev: %p\n", task, fe_count, dev); 313c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags); 314c66ac9dbSNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); 315c66ac9dbSNicholas Bellinger 316c66ac9dbSNicholas Bellinger spin_lock_irqsave(&dev->execute_task_lock, flags); 317c66ac9dbSNicholas Bellinger } 318c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&dev->execute_task_lock, flags); 319c66ac9dbSNicholas Bellinger /* 320c66ac9dbSNicholas Bellinger * Release all commands remaining in the struct se_device cmd queue. 321c66ac9dbSNicholas Bellinger * 322c66ac9dbSNicholas Bellinger * This follows the same logic as above for the struct se_device 323c66ac9dbSNicholas Bellinger * struct se_task state list, where commands are returned with 324c66ac9dbSNicholas Bellinger * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD 325c66ac9dbSNicholas Bellinger * reference, otherwise the struct se_cmd is released. 326c66ac9dbSNicholas Bellinger */ 327c66ac9dbSNicholas Bellinger spin_lock_irqsave(&qobj->cmd_queue_lock, flags); 328c66ac9dbSNicholas Bellinger list_for_each_entry_safe(qr, qr_tmp, &qobj->qobj_list, qr_list) { 329c66ac9dbSNicholas Bellinger cmd = (struct se_cmd *)qr->cmd; 330c66ac9dbSNicholas Bellinger if (!(cmd)) { 331c66ac9dbSNicholas Bellinger /* 332c66ac9dbSNicholas Bellinger * Skip these for non PREEMPT_AND_ABORT usage.. 333c66ac9dbSNicholas Bellinger */ 334c66ac9dbSNicholas Bellinger if (preempt_and_abort_list != NULL) 335c66ac9dbSNicholas Bellinger continue; 336c66ac9dbSNicholas Bellinger 337c66ac9dbSNicholas Bellinger atomic_dec(&qobj->queue_cnt); 338c66ac9dbSNicholas Bellinger list_del(&qr->qr_list); 339c66ac9dbSNicholas Bellinger kfree(qr); 340c66ac9dbSNicholas Bellinger continue; 341c66ac9dbSNicholas Bellinger } 342c66ac9dbSNicholas Bellinger /* 343c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT usage, only process commands 344c66ac9dbSNicholas Bellinger * with a matching reservation key. 345c66ac9dbSNicholas Bellinger */ 346c66ac9dbSNicholas Bellinger if ((preempt_and_abort_list != NULL) && 347c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 348c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 349c66ac9dbSNicholas Bellinger continue; 350c66ac9dbSNicholas Bellinger /* 351c66ac9dbSNicholas Bellinger * Not aborting PROUT PREEMPT_AND_ABORT CDB.. 352c66ac9dbSNicholas Bellinger */ 353c66ac9dbSNicholas Bellinger if (prout_cmd == cmd) 354c66ac9dbSNicholas Bellinger continue; 355c66ac9dbSNicholas Bellinger 356c66ac9dbSNicholas Bellinger atomic_dec(&T_TASK(cmd)->t_transport_queue_active); 357c66ac9dbSNicholas Bellinger atomic_dec(&qobj->queue_cnt); 358c66ac9dbSNicholas Bellinger list_del(&qr->qr_list); 359c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); 360c66ac9dbSNicholas Bellinger 361c66ac9dbSNicholas Bellinger state = qr->state; 362c66ac9dbSNicholas Bellinger kfree(qr); 363c66ac9dbSNicholas Bellinger 364c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: %s from Device Queue: cmd: %p t_state:" 365c66ac9dbSNicholas Bellinger " %d t_fe_count: %d\n", (preempt_and_abort_list) ? 366c66ac9dbSNicholas Bellinger "Preempt" : "", cmd, state, 367c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_fe_count)); 368c66ac9dbSNicholas Bellinger /* 369c66ac9dbSNicholas Bellinger * Signal that the command has failed via cmd->se_cmd_flags, 370c66ac9dbSNicholas Bellinger * and call TFO->new_cmd_failure() to wakeup any fabric 371c66ac9dbSNicholas Bellinger * dependent code used to wait for unsolicited data out 372c66ac9dbSNicholas Bellinger * allocation to complete. The fabric module is expected 373c66ac9dbSNicholas Bellinger * to dump any remaining unsolicited data out for the aborted 374c66ac9dbSNicholas Bellinger * command at this point. 375c66ac9dbSNicholas Bellinger */ 376c66ac9dbSNicholas Bellinger transport_new_cmd_failure(cmd); 377c66ac9dbSNicholas Bellinger 378c66ac9dbSNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, 379c66ac9dbSNicholas Bellinger atomic_read(&T_TASK(cmd)->t_fe_count)); 380c66ac9dbSNicholas Bellinger spin_lock_irqsave(&qobj->cmd_queue_lock, flags); 381c66ac9dbSNicholas Bellinger } 382c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); 383c66ac9dbSNicholas Bellinger /* 384c66ac9dbSNicholas Bellinger * Clear any legacy SPC-2 reservation when called during 385c66ac9dbSNicholas Bellinger * LOGICAL UNIT RESET 386c66ac9dbSNicholas Bellinger */ 387c66ac9dbSNicholas Bellinger if (!(preempt_and_abort_list) && 388c66ac9dbSNicholas Bellinger (dev->dev_flags & DF_SPC2_RESERVATIONS)) { 389c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 390c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 391c66ac9dbSNicholas Bellinger dev->dev_flags &= ~DF_SPC2_RESERVATIONS; 392c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 393c66ac9dbSNicholas Bellinger printk(KERN_INFO "LUN_RESET: SCSI-2 Released reservation\n"); 394c66ac9dbSNicholas Bellinger } 395c66ac9dbSNicholas Bellinger 396c66ac9dbSNicholas Bellinger spin_lock(&dev->stats_lock); 397c66ac9dbSNicholas Bellinger dev->num_resets++; 398c66ac9dbSNicholas Bellinger spin_unlock(&dev->stats_lock); 399c66ac9dbSNicholas Bellinger 400c66ac9dbSNicholas Bellinger DEBUG_LR("LUN_RESET: %s for [%s] Complete\n", 401c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 402c66ac9dbSNicholas Bellinger TRANSPORT(dev)->name); 403c66ac9dbSNicholas Bellinger return 0; 404c66ac9dbSNicholas Bellinger } 405