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> 30c53181afSPaul Gortmaker #include <linux/export.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 struct se_tmr_req *core_tmr_alloc_req( 45c66ac9dbSNicholas Bellinger struct se_cmd *se_cmd, 46c66ac9dbSNicholas Bellinger void *fabric_tmr_ptr, 47dd503a5fSRoland Dreier u8 function, 48dd503a5fSRoland Dreier gfp_t gfp_flags) 49c66ac9dbSNicholas Bellinger { 50c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr; 51c66ac9dbSNicholas Bellinger 52dd503a5fSRoland Dreier tmr = kmem_cache_zalloc(se_tmr_req_cache, gfp_flags); 536708bb27SAndy Grover if (!tmr) { 546708bb27SAndy Grover pr_err("Unable to allocate struct se_tmr_req\n"); 55c66ac9dbSNicholas Bellinger return ERR_PTR(-ENOMEM); 56c66ac9dbSNicholas Bellinger } 57c66ac9dbSNicholas Bellinger tmr->task_cmd = se_cmd; 58c66ac9dbSNicholas Bellinger tmr->fabric_tmr_ptr = fabric_tmr_ptr; 59c66ac9dbSNicholas Bellinger tmr->function = function; 60c66ac9dbSNicholas Bellinger INIT_LIST_HEAD(&tmr->tmr_list); 61c66ac9dbSNicholas Bellinger 62c66ac9dbSNicholas Bellinger return tmr; 63c66ac9dbSNicholas Bellinger } 64c66ac9dbSNicholas Bellinger EXPORT_SYMBOL(core_tmr_alloc_req); 65c66ac9dbSNicholas Bellinger 66c66ac9dbSNicholas Bellinger void core_tmr_release_req( 67c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr) 68c66ac9dbSNicholas Bellinger { 69c66ac9dbSNicholas Bellinger struct se_device *dev = tmr->tmr_dev; 70d050ffb9SNicholas Bellinger unsigned long flags; 71c66ac9dbSNicholas Bellinger 727fd29aa9SNicholas Bellinger if (!dev) { 737fd29aa9SNicholas Bellinger kmem_cache_free(se_tmr_req_cache, tmr); 747fd29aa9SNicholas Bellinger return; 757fd29aa9SNicholas Bellinger } 767fd29aa9SNicholas Bellinger 77d050ffb9SNicholas Bellinger spin_lock_irqsave(&dev->se_tmr_lock, flags); 78c66ac9dbSNicholas Bellinger list_del(&tmr->tmr_list); 79d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&dev->se_tmr_lock, flags); 807fd29aa9SNicholas Bellinger 817fd29aa9SNicholas Bellinger kmem_cache_free(se_tmr_req_cache, tmr); 82c66ac9dbSNicholas Bellinger } 83c66ac9dbSNicholas Bellinger 84c66ac9dbSNicholas Bellinger static void core_tmr_handle_tas_abort( 85c66ac9dbSNicholas Bellinger struct se_node_acl *tmr_nacl, 86c66ac9dbSNicholas Bellinger struct se_cmd *cmd, 87c66ac9dbSNicholas Bellinger int tas, 88c66ac9dbSNicholas Bellinger int fe_count) 89c66ac9dbSNicholas Bellinger { 906708bb27SAndy Grover if (!fe_count) { 91c66ac9dbSNicholas Bellinger transport_cmd_finish_abort(cmd, 1); 92c66ac9dbSNicholas Bellinger return; 93c66ac9dbSNicholas Bellinger } 94c66ac9dbSNicholas Bellinger /* 95c66ac9dbSNicholas Bellinger * TASK ABORTED status (TAS) bit support 96c66ac9dbSNicholas Bellinger */ 976708bb27SAndy Grover if ((tmr_nacl && 98c66ac9dbSNicholas Bellinger (tmr_nacl == cmd->se_sess->se_node_acl)) || tas) 99c66ac9dbSNicholas Bellinger transport_send_task_abort(cmd); 100c66ac9dbSNicholas Bellinger 101c66ac9dbSNicholas Bellinger transport_cmd_finish_abort(cmd, 0); 102c66ac9dbSNicholas Bellinger } 103c66ac9dbSNicholas Bellinger 104d050ffb9SNicholas Bellinger static void core_tmr_drain_tmr_list( 105c66ac9dbSNicholas Bellinger struct se_device *dev, 106c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr, 107d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list) 108c66ac9dbSNicholas Bellinger { 109d050ffb9SNicholas Bellinger LIST_HEAD(drain_tmr_list); 110c66ac9dbSNicholas Bellinger struct se_tmr_req *tmr_p, *tmr_pp; 111d050ffb9SNicholas Bellinger struct se_cmd *cmd; 112c66ac9dbSNicholas Bellinger unsigned long flags; 113c66ac9dbSNicholas Bellinger /* 114c66ac9dbSNicholas Bellinger * Release all pending and outgoing TMRs aside from the received 115c66ac9dbSNicholas Bellinger * LUN_RESET tmr.. 116c66ac9dbSNicholas Bellinger */ 117d050ffb9SNicholas Bellinger spin_lock_irqsave(&dev->se_tmr_lock, flags); 118c66ac9dbSNicholas Bellinger list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { 119c66ac9dbSNicholas Bellinger /* 120c66ac9dbSNicholas Bellinger * Allow the received TMR to return with FUNCTION_COMPLETE. 121c66ac9dbSNicholas Bellinger */ 122c66ac9dbSNicholas Bellinger if (tmr && (tmr_p == tmr)) 123c66ac9dbSNicholas Bellinger continue; 124c66ac9dbSNicholas Bellinger 125c66ac9dbSNicholas Bellinger cmd = tmr_p->task_cmd; 1266708bb27SAndy Grover if (!cmd) { 1276708bb27SAndy Grover pr_err("Unable to locate struct se_cmd for TMR\n"); 128c66ac9dbSNicholas Bellinger continue; 129c66ac9dbSNicholas Bellinger } 130c66ac9dbSNicholas Bellinger /* 131c66ac9dbSNicholas Bellinger * If this function was called with a valid pr_res_key 132c66ac9dbSNicholas Bellinger * parameter (eg: for PROUT PREEMPT_AND_ABORT service action 133c66ac9dbSNicholas Bellinger * skip non regisration key matching TMRs. 134c66ac9dbSNicholas Bellinger */ 1356708bb27SAndy Grover if (preempt_and_abort_list && 136c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 137c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 138c66ac9dbSNicholas Bellinger continue; 139c66ac9dbSNicholas Bellinger 140d050ffb9SNicholas Bellinger spin_lock(&cmd->t_state_lock); 1416708bb27SAndy Grover if (!atomic_read(&cmd->t_transport_active)) { 142d050ffb9SNicholas Bellinger spin_unlock(&cmd->t_state_lock); 143c66ac9dbSNicholas Bellinger continue; 144c66ac9dbSNicholas Bellinger } 145c66ac9dbSNicholas Bellinger if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { 146d050ffb9SNicholas Bellinger spin_unlock(&cmd->t_state_lock); 147c66ac9dbSNicholas Bellinger continue; 148c66ac9dbSNicholas Bellinger } 149d050ffb9SNicholas Bellinger spin_unlock(&cmd->t_state_lock); 150d050ffb9SNicholas Bellinger 151d050ffb9SNicholas Bellinger list_move_tail(&tmr->tmr_list, &drain_tmr_list); 152d050ffb9SNicholas Bellinger } 153d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&dev->se_tmr_lock, flags); 154d050ffb9SNicholas Bellinger 155d050ffb9SNicholas Bellinger while (!list_empty(&drain_tmr_list)) { 156d050ffb9SNicholas Bellinger tmr = list_entry(drain_tmr_list.next, struct se_tmr_req, tmr_list); 157d050ffb9SNicholas Bellinger list_del(&tmr->tmr_list); 158d050ffb9SNicholas Bellinger cmd = tmr_p->task_cmd; 159d050ffb9SNicholas Bellinger 1606708bb27SAndy Grover pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x," 161c66ac9dbSNicholas Bellinger " Response: 0x%02x, t_state: %d\n", 162d050ffb9SNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "", tmr, 163d050ffb9SNicholas Bellinger tmr->function, tmr->response, cmd->t_state); 164c66ac9dbSNicholas Bellinger 1658dc52b54SNicholas Bellinger transport_cmd_finish_abort(cmd, 1); 166c66ac9dbSNicholas Bellinger } 167d050ffb9SNicholas Bellinger } 168d050ffb9SNicholas Bellinger 169d050ffb9SNicholas Bellinger static void core_tmr_drain_task_list( 170d050ffb9SNicholas Bellinger struct se_device *dev, 171d050ffb9SNicholas Bellinger struct se_cmd *prout_cmd, 172d050ffb9SNicholas Bellinger struct se_node_acl *tmr_nacl, 173d050ffb9SNicholas Bellinger int tas, 174d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list) 175d050ffb9SNicholas Bellinger { 176d050ffb9SNicholas Bellinger LIST_HEAD(drain_task_list); 177d050ffb9SNicholas Bellinger struct se_cmd *cmd; 178d050ffb9SNicholas Bellinger struct se_task *task, *task_tmp; 179d050ffb9SNicholas Bellinger unsigned long flags; 180d050ffb9SNicholas Bellinger int fe_count; 181c66ac9dbSNicholas Bellinger /* 182c66ac9dbSNicholas Bellinger * Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status. 183c66ac9dbSNicholas Bellinger * This is following sam4r17, section 5.6 Aborting commands, Table 38 184c66ac9dbSNicholas Bellinger * for TMR LUN_RESET: 185c66ac9dbSNicholas Bellinger * 186c66ac9dbSNicholas Bellinger * a) "Yes" indicates that each command that is aborted on an I_T nexus 187c66ac9dbSNicholas Bellinger * other than the one that caused the SCSI device condition is 188c66ac9dbSNicholas Bellinger * completed with TASK ABORTED status, if the TAS bit is set to one in 189c66ac9dbSNicholas Bellinger * the Control mode page (see SPC-4). "No" indicates that no status is 190c66ac9dbSNicholas Bellinger * returned for aborted commands. 191c66ac9dbSNicholas Bellinger * 192c66ac9dbSNicholas Bellinger * d) If the logical unit reset is caused by a particular I_T nexus 193c66ac9dbSNicholas Bellinger * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" 194c66ac9dbSNicholas Bellinger * (TASK_ABORTED status) applies. 195c66ac9dbSNicholas Bellinger * 196c66ac9dbSNicholas Bellinger * Otherwise (e.g., if triggered by a hard reset), "no" 197c66ac9dbSNicholas Bellinger * (no TASK_ABORTED SAM status) applies. 198c66ac9dbSNicholas Bellinger * 199c66ac9dbSNicholas Bellinger * Note that this seems to be independent of TAS (Task Aborted Status) 200c66ac9dbSNicholas Bellinger * in the Control Mode Page. 201c66ac9dbSNicholas Bellinger */ 202c66ac9dbSNicholas Bellinger spin_lock_irqsave(&dev->execute_task_lock, flags); 203c66ac9dbSNicholas Bellinger list_for_each_entry_safe(task, task_tmp, &dev->state_task_list, 204c66ac9dbSNicholas Bellinger t_state_list) { 205e3d6f909SAndy Grover if (!task->task_se_cmd) { 2066708bb27SAndy Grover pr_err("task->task_se_cmd is NULL!\n"); 207c66ac9dbSNicholas Bellinger continue; 208c66ac9dbSNicholas Bellinger } 209e3d6f909SAndy Grover cmd = task->task_se_cmd; 210c66ac9dbSNicholas Bellinger 211c66ac9dbSNicholas Bellinger /* 212c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT usage, only process commands 213c66ac9dbSNicholas Bellinger * with a matching reservation key. 214c66ac9dbSNicholas Bellinger */ 2156708bb27SAndy Grover if (preempt_and_abort_list && 216c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 217c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 218c66ac9dbSNicholas Bellinger continue; 219c66ac9dbSNicholas Bellinger /* 220c66ac9dbSNicholas Bellinger * Not aborting PROUT PREEMPT_AND_ABORT CDB.. 221c66ac9dbSNicholas Bellinger */ 222c66ac9dbSNicholas Bellinger if (prout_cmd == cmd) 223c66ac9dbSNicholas Bellinger continue; 224c66ac9dbSNicholas Bellinger 225d050ffb9SNicholas Bellinger list_move_tail(&task->t_state_list, &drain_task_list); 226c66ac9dbSNicholas Bellinger atomic_set(&task->task_state_active, 0); 227d050ffb9SNicholas Bellinger /* 228d050ffb9SNicholas Bellinger * Remove from task execute list before processing drain_task_list 229d050ffb9SNicholas Bellinger */ 23004629b7bSChristoph Hellwig if (!list_empty(&task->t_execute_list)) 23104629b7bSChristoph Hellwig __transport_remove_task_from_execute_queue(task, dev); 232d050ffb9SNicholas Bellinger } 233c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&dev->execute_task_lock, flags); 234c66ac9dbSNicholas Bellinger 235d050ffb9SNicholas Bellinger while (!list_empty(&drain_task_list)) { 236d050ffb9SNicholas Bellinger task = list_entry(drain_task_list.next, struct se_task, t_state_list); 237d050ffb9SNicholas Bellinger list_del(&task->t_state_list); 238d050ffb9SNicholas Bellinger cmd = task->task_se_cmd; 239d050ffb9SNicholas Bellinger 2406708bb27SAndy Grover pr_debug("LUN_RESET: %s cmd: %p task: %p" 241f2da9dbdSChristoph Hellwig " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state: %d" 242f2da9dbdSChristoph Hellwig "cdb: 0x%02x\n", 243c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "", cmd, task, 244e3d6f909SAndy Grover cmd->se_tfo->get_task_tag(cmd), 0, 245e3d6f909SAndy Grover cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, 246f2da9dbdSChristoph Hellwig cmd->t_task_cdb[0]); 2476708bb27SAndy Grover pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" 248c66ac9dbSNicholas Bellinger " t_task_cdbs: %d t_task_cdbs_left: %d" 249c66ac9dbSNicholas Bellinger " t_task_cdbs_sent: %d -- t_transport_active: %d" 250c66ac9dbSNicholas Bellinger " t_transport_stop: %d t_transport_sent: %d\n", 251e3d6f909SAndy Grover cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key, 252a1d8b49aSAndy Grover cmd->t_task_list_num, 253a1d8b49aSAndy Grover atomic_read(&cmd->t_task_cdbs_left), 254a1d8b49aSAndy Grover atomic_read(&cmd->t_task_cdbs_sent), 255a1d8b49aSAndy Grover atomic_read(&cmd->t_transport_active), 256a1d8b49aSAndy Grover atomic_read(&cmd->t_transport_stop), 257a1d8b49aSAndy Grover atomic_read(&cmd->t_transport_sent)); 258c66ac9dbSNicholas Bellinger 25935e0e757SChristoph Hellwig /* 26035e0e757SChristoph Hellwig * If the command may be queued onto a workqueue cancel it now. 26135e0e757SChristoph Hellwig * 26235e0e757SChristoph Hellwig * This is equivalent to removal from the execute queue in the 26335e0e757SChristoph Hellwig * loop above, but we do it down here given that 26435e0e757SChristoph Hellwig * cancel_work_sync may block. 26535e0e757SChristoph Hellwig */ 26635e0e757SChristoph Hellwig if (cmd->t_state == TRANSPORT_COMPLETE) 26735e0e757SChristoph Hellwig cancel_work_sync(&cmd->work); 26835e0e757SChristoph Hellwig 269a1d8b49aSAndy Grover spin_lock_irqsave(&cmd->t_state_lock, flags); 270cdbb70bbSChristoph Hellwig target_stop_task(task, &flags); 271c66ac9dbSNicholas Bellinger 2726708bb27SAndy Grover if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) { 273d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&cmd->t_state_lock, flags); 2746708bb27SAndy Grover pr_debug("LUN_RESET: Skipping task: %p, dev: %p for" 275c66ac9dbSNicholas Bellinger " t_task_cdbs_ex_left: %d\n", task, dev, 276a1d8b49aSAndy Grover atomic_read(&cmd->t_task_cdbs_ex_left)); 277c66ac9dbSNicholas Bellinger continue; 278c66ac9dbSNicholas Bellinger } 279a1d8b49aSAndy Grover fe_count = atomic_read(&cmd->t_fe_count); 280c66ac9dbSNicholas Bellinger 281a1d8b49aSAndy Grover if (atomic_read(&cmd->t_transport_active)) { 2826708bb27SAndy Grover pr_debug("LUN_RESET: got t_transport_active = 1 for" 283c66ac9dbSNicholas Bellinger " task: %p, t_fe_count: %d dev: %p\n", task, 284c66ac9dbSNicholas Bellinger fe_count, dev); 285a1d8b49aSAndy Grover atomic_set(&cmd->t_transport_aborted, 1); 286d050ffb9SNicholas Bellinger spin_unlock_irqrestore(&cmd->t_state_lock, flags); 287c66ac9dbSNicholas Bellinger 288d050ffb9SNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); 289c66ac9dbSNicholas Bellinger continue; 290c66ac9dbSNicholas Bellinger } 2916708bb27SAndy Grover pr_debug("LUN_RESET: Got t_transport_active = 0 for task: %p," 292c66ac9dbSNicholas Bellinger " t_fe_count: %d dev: %p\n", task, fe_count, dev); 293a1d8b49aSAndy Grover atomic_set(&cmd->t_transport_aborted, 1); 294a1d8b49aSAndy Grover 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 } 298d050ffb9SNicholas Bellinger } 299d050ffb9SNicholas Bellinger 300d050ffb9SNicholas Bellinger static void core_tmr_drain_cmd_list( 301d050ffb9SNicholas Bellinger struct se_device *dev, 302d050ffb9SNicholas Bellinger struct se_cmd *prout_cmd, 303d050ffb9SNicholas Bellinger struct se_node_acl *tmr_nacl, 304d050ffb9SNicholas Bellinger int tas, 305d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list) 306d050ffb9SNicholas Bellinger { 307d050ffb9SNicholas Bellinger LIST_HEAD(drain_cmd_list); 308d050ffb9SNicholas Bellinger struct se_queue_obj *qobj = &dev->dev_queue_obj; 309d050ffb9SNicholas Bellinger struct se_cmd *cmd, *tcmd; 310d050ffb9SNicholas Bellinger unsigned long flags; 311c66ac9dbSNicholas Bellinger /* 312c66ac9dbSNicholas Bellinger * Release all commands remaining in the struct se_device cmd queue. 313c66ac9dbSNicholas Bellinger * 314c66ac9dbSNicholas Bellinger * This follows the same logic as above for the struct se_device 315c66ac9dbSNicholas Bellinger * struct se_task state list, where commands are returned with 316c66ac9dbSNicholas Bellinger * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD 317c66ac9dbSNicholas Bellinger * reference, otherwise the struct se_cmd is released. 318c66ac9dbSNicholas Bellinger */ 319c66ac9dbSNicholas Bellinger spin_lock_irqsave(&qobj->cmd_queue_lock, flags); 3205951146dSAndy Grover list_for_each_entry_safe(cmd, tcmd, &qobj->qobj_list, se_queue_node) { 321c66ac9dbSNicholas Bellinger /* 322c66ac9dbSNicholas Bellinger * For PREEMPT_AND_ABORT usage, only process commands 323c66ac9dbSNicholas Bellinger * with a matching reservation key. 324c66ac9dbSNicholas Bellinger */ 3256708bb27SAndy Grover if (preempt_and_abort_list && 326c66ac9dbSNicholas Bellinger (core_scsi3_check_cdb_abort_and_preempt( 327c66ac9dbSNicholas Bellinger preempt_and_abort_list, cmd) != 0)) 328c66ac9dbSNicholas Bellinger continue; 329c66ac9dbSNicholas Bellinger /* 330c66ac9dbSNicholas Bellinger * Not aborting PROUT PREEMPT_AND_ABORT CDB.. 331c66ac9dbSNicholas Bellinger */ 332c66ac9dbSNicholas Bellinger if (prout_cmd == cmd) 333c66ac9dbSNicholas Bellinger continue; 334b0e062aeSNicholas Bellinger /* 335b0e062aeSNicholas Bellinger * Skip direct processing of TRANSPORT_FREE_CMD_INTR for 336b0e062aeSNicholas Bellinger * HW target mode fabrics. 337b0e062aeSNicholas Bellinger */ 338b0e062aeSNicholas Bellinger spin_lock(&cmd->t_state_lock); 339b0e062aeSNicholas Bellinger if (cmd->t_state == TRANSPORT_FREE_CMD_INTR) { 340b0e062aeSNicholas Bellinger spin_unlock(&cmd->t_state_lock); 341b0e062aeSNicholas Bellinger continue; 342b0e062aeSNicholas Bellinger } 343b0e062aeSNicholas Bellinger spin_unlock(&cmd->t_state_lock); 344c66ac9dbSNicholas Bellinger 345d050ffb9SNicholas Bellinger atomic_set(&cmd->t_transport_queue_active, 0); 346c66ac9dbSNicholas Bellinger atomic_dec(&qobj->queue_cnt); 347d050ffb9SNicholas Bellinger list_move_tail(&cmd->se_queue_node, &drain_cmd_list); 348d050ffb9SNicholas Bellinger } 349c66ac9dbSNicholas Bellinger spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); 350c66ac9dbSNicholas Bellinger 351d050ffb9SNicholas Bellinger while (!list_empty(&drain_cmd_list)) { 352d050ffb9SNicholas Bellinger cmd = list_entry(drain_cmd_list.next, struct se_cmd, se_queue_node); 353d050ffb9SNicholas Bellinger list_del_init(&cmd->se_queue_node); 354d050ffb9SNicholas Bellinger 3556708bb27SAndy Grover pr_debug("LUN_RESET: %s from Device Queue: cmd: %p t_state:" 356c66ac9dbSNicholas Bellinger " %d t_fe_count: %d\n", (preempt_and_abort_list) ? 3575951146dSAndy Grover "Preempt" : "", cmd, cmd->t_state, 358a1d8b49aSAndy Grover atomic_read(&cmd->t_fe_count)); 359c66ac9dbSNicholas Bellinger /* 360c66ac9dbSNicholas Bellinger * Signal that the command has failed via cmd->se_cmd_flags, 361c66ac9dbSNicholas Bellinger */ 362c66ac9dbSNicholas Bellinger transport_new_cmd_failure(cmd); 363c66ac9dbSNicholas Bellinger 364c66ac9dbSNicholas Bellinger core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, 365a1d8b49aSAndy Grover atomic_read(&cmd->t_fe_count)); 366c66ac9dbSNicholas Bellinger } 367d050ffb9SNicholas Bellinger } 368d050ffb9SNicholas Bellinger 369d050ffb9SNicholas Bellinger int core_tmr_lun_reset( 370d050ffb9SNicholas Bellinger struct se_device *dev, 371d050ffb9SNicholas Bellinger struct se_tmr_req *tmr, 372d050ffb9SNicholas Bellinger struct list_head *preempt_and_abort_list, 373d050ffb9SNicholas Bellinger struct se_cmd *prout_cmd) 374d050ffb9SNicholas Bellinger { 375d050ffb9SNicholas Bellinger struct se_node_acl *tmr_nacl = NULL; 376d050ffb9SNicholas Bellinger struct se_portal_group *tmr_tpg = NULL; 377d050ffb9SNicholas Bellinger int tas; 378d050ffb9SNicholas Bellinger /* 379d050ffb9SNicholas Bellinger * TASK_ABORTED status bit, this is configurable via ConfigFS 380d050ffb9SNicholas Bellinger * struct se_device attributes. spc4r17 section 7.4.6 Control mode page 381d050ffb9SNicholas Bellinger * 382d050ffb9SNicholas Bellinger * A task aborted status (TAS) bit set to zero specifies that aborted 383d050ffb9SNicholas Bellinger * tasks shall be terminated by the device server without any response 384d050ffb9SNicholas Bellinger * to the application client. A TAS bit set to one specifies that tasks 385d050ffb9SNicholas Bellinger * aborted by the actions of an I_T nexus other than the I_T nexus on 386d050ffb9SNicholas Bellinger * which the command was received shall be completed with TASK ABORTED 387d050ffb9SNicholas Bellinger * status (see SAM-4). 388d050ffb9SNicholas Bellinger */ 389d050ffb9SNicholas Bellinger tas = dev->se_sub_dev->se_dev_attrib.emulate_tas; 390d050ffb9SNicholas Bellinger /* 391d050ffb9SNicholas Bellinger * Determine if this se_tmr is coming from a $FABRIC_MOD 392d050ffb9SNicholas Bellinger * or struct se_device passthrough.. 393d050ffb9SNicholas Bellinger */ 394d050ffb9SNicholas Bellinger if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { 395d050ffb9SNicholas Bellinger tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; 396d050ffb9SNicholas Bellinger tmr_tpg = tmr->task_cmd->se_sess->se_tpg; 397d050ffb9SNicholas Bellinger if (tmr_nacl && tmr_tpg) { 398d050ffb9SNicholas Bellinger pr_debug("LUN_RESET: TMR caller fabric: %s" 399d050ffb9SNicholas Bellinger " initiator port %s\n", 400d050ffb9SNicholas Bellinger tmr_tpg->se_tpg_tfo->get_fabric_name(), 401d050ffb9SNicholas Bellinger tmr_nacl->initiatorname); 402d050ffb9SNicholas Bellinger } 403d050ffb9SNicholas Bellinger } 404d050ffb9SNicholas Bellinger pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n", 405d050ffb9SNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 406d050ffb9SNicholas Bellinger dev->transport->name, tas); 407d050ffb9SNicholas Bellinger 408d050ffb9SNicholas Bellinger core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list); 409d050ffb9SNicholas Bellinger core_tmr_drain_task_list(dev, prout_cmd, tmr_nacl, tas, 410d050ffb9SNicholas Bellinger preempt_and_abort_list); 411d050ffb9SNicholas Bellinger core_tmr_drain_cmd_list(dev, prout_cmd, tmr_nacl, tas, 412d050ffb9SNicholas Bellinger preempt_and_abort_list); 413c66ac9dbSNicholas Bellinger /* 414c66ac9dbSNicholas Bellinger * Clear any legacy SPC-2 reservation when called during 415c66ac9dbSNicholas Bellinger * LOGICAL UNIT RESET 416c66ac9dbSNicholas Bellinger */ 4176708bb27SAndy Grover if (!preempt_and_abort_list && 418c66ac9dbSNicholas Bellinger (dev->dev_flags & DF_SPC2_RESERVATIONS)) { 419c66ac9dbSNicholas Bellinger spin_lock(&dev->dev_reservation_lock); 420c66ac9dbSNicholas Bellinger dev->dev_reserved_node_acl = NULL; 421c66ac9dbSNicholas Bellinger dev->dev_flags &= ~DF_SPC2_RESERVATIONS; 422c66ac9dbSNicholas Bellinger spin_unlock(&dev->dev_reservation_lock); 4236708bb27SAndy Grover pr_debug("LUN_RESET: SCSI-2 Released reservation\n"); 424c66ac9dbSNicholas Bellinger } 425c66ac9dbSNicholas Bellinger 4261e7de68cSNicholas Bellinger spin_lock_irq(&dev->stats_lock); 427c66ac9dbSNicholas Bellinger dev->num_resets++; 4281e7de68cSNicholas Bellinger spin_unlock_irq(&dev->stats_lock); 429c66ac9dbSNicholas Bellinger 4306708bb27SAndy Grover pr_debug("LUN_RESET: %s for [%s] Complete\n", 431c66ac9dbSNicholas Bellinger (preempt_and_abort_list) ? "Preempt" : "TMR", 432e3d6f909SAndy Grover dev->transport->name); 433c66ac9dbSNicholas Bellinger return 0; 434c66ac9dbSNicholas Bellinger } 435d050ffb9SNicholas Bellinger 436