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/slab.h> 28c66ac9dbSNicholas Bellinger #include <linux/spinlock.h> 29c66ac9dbSNicholas Bellinger #include <linux/list.h> 30c66ac9dbSNicholas Bellinger #include <scsi/scsi.h> 31c66ac9dbSNicholas Bellinger #include <scsi/scsi_cmnd.h> 32c66ac9dbSNicholas Bellinger 33c66ac9dbSNicholas Bellinger #include <target/target_core_base.h> 34c66ac9dbSNicholas Bellinger #include <target/target_core_device.h> 35c66ac9dbSNicholas Bellinger #include <target/target_core_tmr.h> 36c66ac9dbSNicholas Bellinger #include <target/target_core_transport.h> 37c66ac9dbSNicholas Bellinger #include <target/target_core_fabric_ops.h> 38c66ac9dbSNicholas Bellinger #include <target/target_core_configfs.h> 39c66ac9dbSNicholas Bellinger 40c66ac9dbSNicholas Bellinger #include "target_core_alua.h" 41c66ac9dbSNicholas Bellinger #include "target_core_pr.h" 42c66ac9dbSNicholas Bellinger 43c66ac9dbSNicholas Bellinger struct se_tmr_req *core_tmr_alloc_req( 44c66ac9dbSNicholas Bellinger struct se_cmd *se_cmd, 45c66ac9dbSNicholas Bellinger void *fabric_tmr_ptr, 46c66ac9dbSNicholas Bellinger u8 function) 47c66ac9dbSNicholas Bellinger { 48c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr; 49c66ac9dbSNicholas Bellinger 501e7de68cSNicholas Bellinger tmr = kmem_cache_zalloc(se_tmr_req_cache, (in_interrupt()) ? 511e7de68cSNicholas Bellinger GFP_ATOMIC : GFP_KERNEL); 526708bb27SAndy Grover if (!tmr) { 536708bb27SAndy Grover pr_err("Unable to allocate struct se_tmr_req\n"); 54c66ac9dbSNicholas Bellinger return ERR_PTR(-ENOMEM); 55c66ac9dbSNicholas Bellinger } 56c66ac9dbSNicholas Bellinger tmr->task_cmd = se_cmd; 57c66ac9dbSNicholas Bellinger tmr->fabric_tmr_ptr = fabric_tmr_ptr; 58c66ac9dbSNicholas Bellinger tmr->function = function; 59c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tmr->tmr_list); 60c66ac9dbSNicholas Bellinger 61c66ac9dbSNicholas Bellinger return tmr; 62c66ac9dbSNicholas Bellinger } 63c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(core_tmr_alloc_req); 64c66ac9dbSNicholas Bellinger 65c66ac9dbSNicholas Bellinger void core_tmr_release_req( 66c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr) 67c66ac9dbSNicholas Bellinger { 68c66ac9dbSNicholas Bellinger struct se_device *dev = tmr->tmr_dev; 69d050ffb9SNicholas Bellinger unsigned long flags; 70c66ac9dbSNicholas Bellinger 717fd29aa9SNicholas Bellinger if (!dev) { 727fd29aa9SNicholas Bellinger kmem_cache_free(se_tmr_req_cache, tmr); 737fd29aa9SNicholas Bellinger return; 747fd29aa9SNicholas Bellinger } 757fd29aa9SNicholas Bellinger 76d050ffb9SNicholas Bellinger spin_lock_irqsave(&dev->se_tmr_lock, flags); 77c66ac9dbSNicholas Bellinger list_del(&tmr->tmr_list); 78d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&dev->se_tmr_lock, flags); 797fd29aa9SNicholas Bellinger 807fd29aa9SNicholas Bellinger kmem_cache_free(se_tmr_req_cache, tmr); 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 { 896708bb27SAndy Grover 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 */ 966708bb27SAndy Grover if ((tmr_nacl && 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 103d050ffb9SNicholas Bellinger static void core_tmr_drain_tmr_list( 104c66ac9dbSNicholas Bellinger struct se_device *dev, 105c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr, 106d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list) 107c66ac9dbSNicholas Bellinger { 108d050ffb9SNicholas Bellinger LIST_HEAD(drain_tmr_list); 109c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr_p, *tmr_pp; 110d050ffb9SNicholas Bellinger struct se_cmd *cmd; 111c66ac9dbSNicholas Bellinger unsigned long flags; 112c66ac9dbSNicholas Bellinger /* 113c66ac9dbSNicholas Bellinger * Release all pending and outgoing TMRs aside from the received 114c66ac9dbSNicholas Bellinger * LUN_RESET tmr.. 115c66ac9dbSNicholas Bellinger */ 116d050ffb9SNicholas Bellinger spin_lock_irqsave(&dev->se_tmr_lock, flags); 117c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { 118c66ac9dbSNicholas Bellinger /* 119c66ac9dbSNicholas Bellinger * Allow the received TMR to return with FUNCTION_COMPLETE. 120c66ac9dbSNicholas Bellinger */ 121c66ac9dbSNicholas Bellinger if (tmr && (tmr_p == tmr)) 122c66ac9dbSNicholas Bellinger continue; 123c66ac9dbSNicholas Bellinger 124c66ac9dbSNicholas Bellinger cmd = tmr_p->task_cmd; 1256708bb27SAndy Grover if (!cmd) { 1266708bb27SAndy Grover pr_err("Unable to locate struct se_cmd for TMR\n"); 127c66ac9dbSNicholas Bellinger continue; 128c66ac9dbSNicholas Bellinger } 129c66ac9dbSNicholas Bellinger /* 130c66ac9dbSNicholas Bellinger * If this function was called with a valid pr_res_key 131c66ac9dbSNicholas Bellinger * parameter (eg: for PROUT PREEMPT_AND_ABORT service action 132c66ac9dbSNicholas Bellinger * skip non regisration key matching TMRs. 133c66ac9dbSNicholas Bellinger */ 1346708bb27SAndy Grover if (preempt_and_abort_list && 135c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 136c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 137c66ac9dbSNicholas Bellinger continue; 138c66ac9dbSNicholas Bellinger 139d050ffb9SNicholas Bellinger spin_lock(&cmd->t_state_lock); 1406708bb27SAndy Grover if (!atomic_read(&cmd->t_transport_active)) { 141d050ffb9SNicholas Bellinger spin_unlock(&cmd->t_state_lock); 142c66ac9dbSNicholas Bellinger continue; 143c66ac9dbSNicholas Bellinger } 144c66ac9dbSNicholas Bellinger if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { 145d050ffb9SNicholas Bellinger spin_unlock(&cmd->t_state_lock); 146c66ac9dbSNicholas Bellinger continue; 147c66ac9dbSNicholas Bellinger } 148d050ffb9SNicholas Bellinger spin_unlock(&cmd->t_state_lock); 149d050ffb9SNicholas Bellinger 150d050ffb9SNicholas Bellinger list_move_tail(&tmr->tmr_list, &drain_tmr_list); 151d050ffb9SNicholas Bellinger } 152d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&dev->se_tmr_lock, flags); 153d050ffb9SNicholas Bellinger 154d050ffb9SNicholas Bellinger while (!list_empty(&drain_tmr_list)) { 155d050ffb9SNicholas Bellinger tmr = list_entry(drain_tmr_list.next, struct se_tmr_req, tmr_list); 156d050ffb9SNicholas Bellinger list_del(&tmr->tmr_list); 157d050ffb9SNicholas Bellinger cmd = tmr_p->task_cmd; 158d050ffb9SNicholas Bellinger 1596708bb27SAndy Grover pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x," 160c66ac9dbSNicholas Bellinger " Response: 0x%02x, t_state: %d\n", 161d050ffb9SNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "", tmr, 162d050ffb9SNicholas Bellinger tmr->function, tmr->response, cmd->t_state); 163c66ac9dbSNicholas Bellinger 164c66ac9dbSNicholas Bellinger transport_cmd_finish_abort_tmr(cmd); 165c66ac9dbSNicholas Bellinger } 166d050ffb9SNicholas Bellinger } 167d050ffb9SNicholas Bellinger 168d050ffb9SNicholas Bellinger static void core_tmr_drain_task_list( 169d050ffb9SNicholas Bellinger struct se_device *dev, 170d050ffb9SNicholas Bellinger struct se_cmd *prout_cmd, 171d050ffb9SNicholas Bellinger struct se_node_acl *tmr_nacl, 172d050ffb9SNicholas Bellinger int tas, 173d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list) 174d050ffb9SNicholas Bellinger { 175d050ffb9SNicholas Bellinger LIST_HEAD(drain_task_list); 176d050ffb9SNicholas Bellinger struct se_cmd *cmd; 177d050ffb9SNicholas Bellinger struct se_task *task, *task_tmp; 178d050ffb9SNicholas Bellinger unsigned long flags; 179d050ffb9SNicholas Bellinger int fe_count; 180c66ac9dbSNicholas Bellinger /* 181c66ac9dbSNicholas Bellinger * Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status. 182c66ac9dbSNicholas Bellinger * This is following sam4r17, section 5.6 Aborting commands, Table 38 183c66ac9dbSNicholas Bellinger * for TMR LUN_RESET: 184c66ac9dbSNicholas Bellinger * 185c66ac9dbSNicholas Bellinger * a) "Yes" indicates that each command that is aborted on an I_T nexus 186c66ac9dbSNicholas Bellinger * other than the one that caused the SCSI device condition is 187c66ac9dbSNicholas Bellinger * completed with TASK ABORTED status, if the TAS bit is set to one in 188c66ac9dbSNicholas Bellinger * the Control mode page (see SPC-4). "No" indicates that no status is 189c66ac9dbSNicholas Bellinger * returned for aborted commands. 190c66ac9dbSNicholas Bellinger * 191c66ac9dbSNicholas Bellinger * d) If the logical unit reset is caused by a particular I_T nexus 192c66ac9dbSNicholas Bellinger * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" 193c66ac9dbSNicholas Bellinger * (TASK_ABORTED status) applies. 194c66ac9dbSNicholas Bellinger * 195c66ac9dbSNicholas Bellinger * Otherwise (e.g., if triggered by a hard reset), "no" 196c66ac9dbSNicholas Bellinger * (no TASK_ABORTED SAM status) applies. 197c66ac9dbSNicholas Bellinger * 198c66ac9dbSNicholas Bellinger * Note that this seems to be independent of TAS (Task Aborted Status) 199c66ac9dbSNicholas Bellinger * in the Control Mode Page. 200c66ac9dbSNicholas Bellinger */ 201c66ac9dbSNicholas Bellinger spin_lock_irqsave(&dev->execute_task_lock, flags); 202c66ac9dbSNicholas Bellinger list_for_each_entry_safe(task, task_tmp, &dev->state_task_list, 203c66ac9dbSNicholas Bellinger t_state_list) { 204e3d6f909SAndy Grover if (!task->task_se_cmd) { 2056708bb27SAndy Grover pr_err("task->task_se_cmd is NULL!\n"); 206c66ac9dbSNicholas Bellinger continue; 207c66ac9dbSNicholas Bellinger } 208e3d6f909SAndy Grover cmd = task->task_se_cmd; 209c66ac9dbSNicholas Bellinger 210c66ac9dbSNicholas Bellinger /* 211c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT usage, only process commands 212c66ac9dbSNicholas Bellinger * with a matching reservation key. 213c66ac9dbSNicholas Bellinger */ 2146708bb27SAndy Grover if (preempt_and_abort_list && 215c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 216c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 217c66ac9dbSNicholas Bellinger continue; 218c66ac9dbSNicholas Bellinger /* 219c66ac9dbSNicholas Bellinger * Not aborting PROUT PREEMPT_AND_ABORT CDB.. 220c66ac9dbSNicholas Bellinger */ 221c66ac9dbSNicholas Bellinger if (prout_cmd == cmd) 222c66ac9dbSNicholas Bellinger continue; 223c66ac9dbSNicholas Bellinger 224d050ffb9SNicholas Bellinger list_move_tail(&task->t_state_list, &drain_task_list); 225c66ac9dbSNicholas Bellinger atomic_set(&task->task_state_active, 0); 226d050ffb9SNicholas Bellinger /* 227d050ffb9SNicholas Bellinger * Remove from task execute list before processing drain_task_list 228d050ffb9SNicholas Bellinger */ 229d050ffb9SNicholas Bellinger if (atomic_read(&task->task_execute_queue) != 0) { 230d050ffb9SNicholas Bellinger list_del(&task->t_execute_list); 231d050ffb9SNicholas Bellinger atomic_set(&task->task_execute_queue, 0); 232d050ffb9SNicholas Bellinger atomic_dec(&dev->execute_tasks); 233d050ffb9SNicholas Bellinger } 234d050ffb9SNicholas Bellinger } 235c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&dev->execute_task_lock, flags); 236c66ac9dbSNicholas Bellinger 237d050ffb9SNicholas Bellinger while (!list_empty(&drain_task_list)) { 238d050ffb9SNicholas Bellinger task = list_entry(drain_task_list.next, struct se_task, t_state_list); 239d050ffb9SNicholas Bellinger list_del(&task->t_state_list); 240d050ffb9SNicholas Bellinger cmd = task->task_se_cmd; 241d050ffb9SNicholas Bellinger 242a1d8b49aSAndy Grover spin_lock_irqsave(&cmd->t_state_lock, flags); 2436708bb27SAndy Grover pr_debug("LUN_RESET: %s cmd: %p task: %p" 244c66ac9dbSNicholas Bellinger " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/" 245c66ac9dbSNicholas Bellinger "def_t_state: %d/%d cdb: 0x%02x\n", 246c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "", cmd, task, 247e3d6f909SAndy Grover cmd->se_tfo->get_task_tag(cmd), 0, 248e3d6f909SAndy Grover cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, 249a1d8b49aSAndy Grover cmd->deferred_t_state, cmd->t_task_cdb[0]); 2506708bb27SAndy Grover pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" 251c66ac9dbSNicholas Bellinger " t_task_cdbs: %d t_task_cdbs_left: %d" 252c66ac9dbSNicholas Bellinger " t_task_cdbs_sent: %d -- t_transport_active: %d" 253c66ac9dbSNicholas Bellinger " t_transport_stop: %d t_transport_sent: %d\n", 254e3d6f909SAndy Grover cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key, 255a1d8b49aSAndy Grover cmd->t_task_list_num, 256a1d8b49aSAndy Grover atomic_read(&cmd->t_task_cdbs_left), 257a1d8b49aSAndy Grover atomic_read(&cmd->t_task_cdbs_sent), 258a1d8b49aSAndy Grover atomic_read(&cmd->t_transport_active), 259a1d8b49aSAndy Grover atomic_read(&cmd->t_transport_stop), 260a1d8b49aSAndy Grover atomic_read(&cmd->t_transport_sent)); 261c66ac9dbSNicholas Bellinger 262c66ac9dbSNicholas Bellinger if (atomic_read(&task->task_active)) { 263c66ac9dbSNicholas Bellinger atomic_set(&task->task_stop, 1); 264c66ac9dbSNicholas Bellinger spin_unlock_irqrestore( 265a1d8b49aSAndy Grover &cmd->t_state_lock, flags); 266c66ac9dbSNicholas Bellinger 2676708bb27SAndy Grover pr_debug("LUN_RESET: Waiting for task: %p to shutdown" 268c66ac9dbSNicholas Bellinger " for dev: %p\n", task, dev); 269c66ac9dbSNicholas Bellinger wait_for_completion(&task->task_stop_comp); 2706708bb27SAndy Grover pr_debug("LUN_RESET Completed task: %p shutdown for" 271c66ac9dbSNicholas Bellinger " dev: %p\n", task, dev); 272a1d8b49aSAndy Grover spin_lock_irqsave(&cmd->t_state_lock, flags); 273a1d8b49aSAndy Grover atomic_dec(&cmd->t_task_cdbs_left); 274c66ac9dbSNicholas Bellinger 275c66ac9dbSNicholas Bellinger atomic_set(&task->task_active, 0); 276c66ac9dbSNicholas Bellinger atomic_set(&task->task_stop, 0); 277c66ac9dbSNicholas Bellinger } 278c66ac9dbSNicholas Bellinger __transport_stop_task_timer(task, &flags); 279c66ac9dbSNicholas Bellinger 2806708bb27SAndy Grover if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) { 281d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2826708bb27SAndy Grover pr_debug("LUN_RESET: Skipping task: %p, dev: %p for" 283c66ac9dbSNicholas Bellinger " t_task_cdbs_ex_left: %d\n", task, dev, 284a1d8b49aSAndy Grover atomic_read(&cmd->t_task_cdbs_ex_left)); 285c66ac9dbSNicholas Bellinger continue; 286c66ac9dbSNicholas Bellinger } 287a1d8b49aSAndy Grover fe_count = atomic_read(&cmd->t_fe_count); 288c66ac9dbSNicholas Bellinger 289a1d8b49aSAndy Grover if (atomic_read(&cmd->t_transport_active)) { 2906708bb27SAndy Grover pr_debug("LUN_RESET: got t_transport_active = 1 for" 291c66ac9dbSNicholas Bellinger " task: %p, t_fe_count: %d dev: %p\n", task, 292c66ac9dbSNicholas Bellinger fe_count, dev); 293a1d8b49aSAndy Grover atomic_set(&cmd->t_transport_aborted, 1); 294d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&cmd->t_state_lock, flags); 295c66ac9dbSNicholas Bellinger 296d050ffb9SNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); 297c66ac9dbSNicholas Bellinger continue; 298c66ac9dbSNicholas Bellinger } 2996708bb27SAndy Grover pr_debug("LUN_RESET: Got t_transport_active = 0 for task: %p," 300c66ac9dbSNicholas Bellinger " t_fe_count: %d dev: %p\n", task, fe_count, dev); 301a1d8b49aSAndy Grover atomic_set(&cmd->t_transport_aborted, 1); 302a1d8b49aSAndy Grover spin_unlock_irqrestore(&cmd->t_state_lock, flags); 303c66ac9dbSNicholas Bellinger 304d050ffb9SNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); 305c66ac9dbSNicholas Bellinger } 306d050ffb9SNicholas Bellinger } 307d050ffb9SNicholas Bellinger 308d050ffb9SNicholas Bellinger static void core_tmr_drain_cmd_list( 309d050ffb9SNicholas Bellinger struct se_device *dev, 310d050ffb9SNicholas Bellinger struct se_cmd *prout_cmd, 311d050ffb9SNicholas Bellinger struct se_node_acl *tmr_nacl, 312d050ffb9SNicholas Bellinger int tas, 313d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list) 314d050ffb9SNicholas Bellinger { 315d050ffb9SNicholas Bellinger LIST_HEAD(drain_cmd_list); 316d050ffb9SNicholas Bellinger struct se_queue_obj *qobj = &dev->dev_queue_obj; 317d050ffb9SNicholas Bellinger struct se_cmd *cmd, *tcmd; 318d050ffb9SNicholas Bellinger unsigned long 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); 3285951146dSAndy Grover list_for_each_entry_safe(cmd, tcmd, &qobj->qobj_list, se_queue_node) { 329c66ac9dbSNicholas Bellinger /* 330c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT usage, only process commands 331c66ac9dbSNicholas Bellinger * with a matching reservation key. 332c66ac9dbSNicholas Bellinger */ 3336708bb27SAndy Grover if (preempt_and_abort_list && 334c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 335c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 336c66ac9dbSNicholas Bellinger continue; 337c66ac9dbSNicholas Bellinger /* 338c66ac9dbSNicholas Bellinger * Not aborting PROUT PREEMPT_AND_ABORT CDB.. 339c66ac9dbSNicholas Bellinger */ 340c66ac9dbSNicholas Bellinger if (prout_cmd == cmd) 341c66ac9dbSNicholas Bellinger continue; 342c66ac9dbSNicholas Bellinger 343d050ffb9SNicholas Bellinger atomic_set(&cmd->t_transport_queue_active, 0); 344c66ac9dbSNicholas Bellinger atomic_dec(&qobj->queue_cnt); 345d050ffb9SNicholas Bellinger list_move_tail(&cmd->se_queue_node, &drain_cmd_list); 346d050ffb9SNicholas Bellinger } 347c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); 348c66ac9dbSNicholas Bellinger 349d050ffb9SNicholas Bellinger while (!list_empty(&drain_cmd_list)) { 350d050ffb9SNicholas Bellinger cmd = list_entry(drain_cmd_list.next, struct se_cmd, se_queue_node); 351d050ffb9SNicholas Bellinger list_del_init(&cmd->se_queue_node); 352d050ffb9SNicholas Bellinger 3536708bb27SAndy Grover pr_debug("LUN_RESET: %s from Device Queue: cmd: %p t_state:" 354c66ac9dbSNicholas Bellinger " %d t_fe_count: %d\n", (preempt_and_abort_list) ? 3555951146dSAndy Grover "Preempt" : "", cmd, cmd->t_state, 356a1d8b49aSAndy Grover atomic_read(&cmd->t_fe_count)); 357c66ac9dbSNicholas Bellinger /* 358c66ac9dbSNicholas Bellinger * Signal that the command has failed via cmd->se_cmd_flags, 359c66ac9dbSNicholas Bellinger */ 360c66ac9dbSNicholas Bellinger transport_new_cmd_failure(cmd); 361c66ac9dbSNicholas Bellinger 362c66ac9dbSNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, 363a1d8b49aSAndy Grover atomic_read(&cmd->t_fe_count)); 364c66ac9dbSNicholas Bellinger } 365d050ffb9SNicholas Bellinger } 366d050ffb9SNicholas Bellinger 367d050ffb9SNicholas Bellinger int core_tmr_lun_reset( 368d050ffb9SNicholas Bellinger struct se_device *dev, 369d050ffb9SNicholas Bellinger struct se_tmr_req *tmr, 370d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list, 371d050ffb9SNicholas Bellinger struct se_cmd *prout_cmd) 372d050ffb9SNicholas Bellinger { 373d050ffb9SNicholas Bellinger struct se_node_acl *tmr_nacl = NULL; 374d050ffb9SNicholas Bellinger struct se_portal_group *tmr_tpg = NULL; 375d050ffb9SNicholas Bellinger int tas; 376d050ffb9SNicholas Bellinger /* 377d050ffb9SNicholas Bellinger * TASK_ABORTED status bit, this is configurable via ConfigFS 378d050ffb9SNicholas Bellinger * struct se_device attributes. spc4r17 section 7.4.6 Control mode page 379d050ffb9SNicholas Bellinger * 380d050ffb9SNicholas Bellinger * A task aborted status (TAS) bit set to zero specifies that aborted 381d050ffb9SNicholas Bellinger * tasks shall be terminated by the device server without any response 382d050ffb9SNicholas Bellinger * to the application client. A TAS bit set to one specifies that tasks 383d050ffb9SNicholas Bellinger * aborted by the actions of an I_T nexus other than the I_T nexus on 384d050ffb9SNicholas Bellinger * which the command was received shall be completed with TASK ABORTED 385d050ffb9SNicholas Bellinger * status (see SAM-4). 386d050ffb9SNicholas Bellinger */ 387d050ffb9SNicholas Bellinger tas = dev->se_sub_dev->se_dev_attrib.emulate_tas; 388d050ffb9SNicholas Bellinger /* 389d050ffb9SNicholas Bellinger * Determine if this se_tmr is coming from a $FABRIC_MOD 390d050ffb9SNicholas Bellinger * or struct se_device passthrough.. 391d050ffb9SNicholas Bellinger */ 392d050ffb9SNicholas Bellinger if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { 393d050ffb9SNicholas Bellinger tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; 394d050ffb9SNicholas Bellinger tmr_tpg = tmr->task_cmd->se_sess->se_tpg; 395d050ffb9SNicholas Bellinger if (tmr_nacl && tmr_tpg) { 396d050ffb9SNicholas Bellinger pr_debug("LUN_RESET: TMR caller fabric: %s" 397d050ffb9SNicholas Bellinger " initiator port %s\n", 398d050ffb9SNicholas Bellinger tmr_tpg->se_tpg_tfo->get_fabric_name(), 399d050ffb9SNicholas Bellinger tmr_nacl->initiatorname); 400d050ffb9SNicholas Bellinger } 401d050ffb9SNicholas Bellinger } 402d050ffb9SNicholas Bellinger pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n", 403d050ffb9SNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 404d050ffb9SNicholas Bellinger dev->transport->name, tas); 405d050ffb9SNicholas Bellinger 406d050ffb9SNicholas Bellinger core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list); 407d050ffb9SNicholas Bellinger core_tmr_drain_task_list(dev, prout_cmd, tmr_nacl, tas, 408d050ffb9SNicholas Bellinger preempt_and_abort_list); 409d050ffb9SNicholas Bellinger core_tmr_drain_cmd_list(dev, prout_cmd, tmr_nacl, tas, 410d050ffb9SNicholas Bellinger preempt_and_abort_list); 411c66ac9dbSNicholas Bellinger /* 412c66ac9dbSNicholas Bellinger * Clear any legacy SPC-2 reservation when called during 413c66ac9dbSNicholas Bellinger * LOGICAL UNIT RESET 414c66ac9dbSNicholas Bellinger */ 4156708bb27SAndy Grover if (!preempt_and_abort_list && 416c66ac9dbSNicholas Bellinger (dev->dev_flags & DF_SPC2_RESERVATIONS)) { 417c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 418c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 419c66ac9dbSNicholas Bellinger dev->dev_flags &= ~DF_SPC2_RESERVATIONS; 420c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 4216708bb27SAndy Grover pr_debug("LUN_RESET: SCSI-2 Released reservation\n"); 422c66ac9dbSNicholas Bellinger } 423c66ac9dbSNicholas Bellinger 4241e7de68cSNicholas Bellinger spin_lock_irq(&dev->stats_lock); 425c66ac9dbSNicholas Bellinger dev->num_resets++; 4261e7de68cSNicholas Bellinger spin_unlock_irq(&dev->stats_lock); 427c66ac9dbSNicholas Bellinger 4286708bb27SAndy Grover pr_debug("LUN_RESET: %s for [%s] Complete\n", 429c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 430e3d6f909SAndy Grover dev->transport->name); 431c66ac9dbSNicholas Bellinger return 0; 432c66ac9dbSNicholas Bellinger } 433d050ffb9SNicholas Bellinger 434