Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * Filename: target_core_tmr.c |
| 3 | * |
| 4 | * This file contains SPC-3 task management infrastructure |
| 5 | * |
| 6 | * Copyright (c) 2009,2010 Rising Tide Systems |
| 7 | * Copyright (c) 2009,2010 Linux-iSCSI.org |
| 8 | * |
| 9 | * Nicholas A. Bellinger <nab@kernel.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 24 | * |
| 25 | ******************************************************************************/ |
| 26 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 27 | #include <linux/slab.h> |
| 28 | #include <linux/spinlock.h> |
| 29 | #include <linux/list.h> |
| 30 | #include <scsi/scsi.h> |
| 31 | #include <scsi/scsi_cmnd.h> |
| 32 | |
| 33 | #include <target/target_core_base.h> |
| 34 | #include <target/target_core_device.h> |
| 35 | #include <target/target_core_tmr.h> |
| 36 | #include <target/target_core_transport.h> |
| 37 | #include <target/target_core_fabric_ops.h> |
| 38 | #include <target/target_core_configfs.h> |
| 39 | |
| 40 | #include "target_core_alua.h" |
| 41 | #include "target_core_pr.h" |
| 42 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 43 | struct se_tmr_req *core_tmr_alloc_req( |
| 44 | struct se_cmd *se_cmd, |
| 45 | void *fabric_tmr_ptr, |
| 46 | u8 function) |
| 47 | { |
| 48 | struct se_tmr_req *tmr; |
| 49 | |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 50 | tmr = kmem_cache_zalloc(se_tmr_req_cache, (in_interrupt()) ? |
| 51 | GFP_ATOMIC : GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 52 | if (!tmr) { |
| 53 | pr_err("Unable to allocate struct se_tmr_req\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 54 | return ERR_PTR(-ENOMEM); |
| 55 | } |
| 56 | tmr->task_cmd = se_cmd; |
| 57 | tmr->fabric_tmr_ptr = fabric_tmr_ptr; |
| 58 | tmr->function = function; |
| 59 | INIT_LIST_HEAD(&tmr->tmr_list); |
| 60 | |
| 61 | return tmr; |
| 62 | } |
| 63 | EXPORT_SYMBOL(core_tmr_alloc_req); |
| 64 | |
| 65 | void core_tmr_release_req( |
| 66 | struct se_tmr_req *tmr) |
| 67 | { |
| 68 | struct se_device *dev = tmr->tmr_dev; |
| 69 | |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 70 | if (!dev) { |
| 71 | kmem_cache_free(se_tmr_req_cache, tmr); |
| 72 | return; |
| 73 | } |
| 74 | |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 75 | spin_lock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 76 | list_del(&tmr->tmr_list); |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 77 | spin_unlock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 78 | |
| 79 | kmem_cache_free(se_tmr_req_cache, tmr); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | static void core_tmr_handle_tas_abort( |
| 83 | struct se_node_acl *tmr_nacl, |
| 84 | struct se_cmd *cmd, |
| 85 | int tas, |
| 86 | int fe_count) |
| 87 | { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 88 | if (!fe_count) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 89 | transport_cmd_finish_abort(cmd, 1); |
| 90 | return; |
| 91 | } |
| 92 | /* |
| 93 | * TASK ABORTED status (TAS) bit support |
| 94 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 95 | if ((tmr_nacl && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 96 | (tmr_nacl == cmd->se_sess->se_node_acl)) || tas) |
| 97 | transport_send_task_abort(cmd); |
| 98 | |
| 99 | transport_cmd_finish_abort(cmd, 0); |
| 100 | } |
| 101 | |
| 102 | int core_tmr_lun_reset( |
| 103 | struct se_device *dev, |
| 104 | struct se_tmr_req *tmr, |
| 105 | struct list_head *preempt_and_abort_list, |
| 106 | struct se_cmd *prout_cmd) |
| 107 | { |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 108 | struct se_cmd *cmd, *tcmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 109 | struct se_node_acl *tmr_nacl = NULL; |
| 110 | struct se_portal_group *tmr_tpg = NULL; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 111 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 112 | struct se_tmr_req *tmr_p, *tmr_pp; |
| 113 | struct se_task *task, *task_tmp; |
| 114 | unsigned long flags; |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 115 | int fe_count, tas; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 116 | /* |
| 117 | * TASK_ABORTED status bit, this is configurable via ConfigFS |
| 118 | * struct se_device attributes. spc4r17 section 7.4.6 Control mode page |
| 119 | * |
| 120 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 121 | * tasks shall be terminated by the device server without any response |
| 122 | * to the application client. A TAS bit set to one specifies that tasks |
| 123 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 124 | * which the command was received shall be completed with TASK ABORTED |
| 125 | * status (see SAM-4). |
| 126 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 127 | tas = dev->se_sub_dev->se_dev_attrib.emulate_tas; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 128 | /* |
| 129 | * Determine if this se_tmr is coming from a $FABRIC_MOD |
| 130 | * or struct se_device passthrough.. |
| 131 | */ |
| 132 | if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { |
| 133 | tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; |
| 134 | tmr_tpg = tmr->task_cmd->se_sess->se_tpg; |
| 135 | if (tmr_nacl && tmr_tpg) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 136 | pr_debug("LUN_RESET: TMR caller fabric: %s" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 137 | " initiator port %s\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 138 | tmr_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 139 | tmr_nacl->initiatorname); |
| 140 | } |
| 141 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 142 | pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 143 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 144 | dev->transport->name, tas); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 145 | /* |
| 146 | * Release all pending and outgoing TMRs aside from the received |
| 147 | * LUN_RESET tmr.. |
| 148 | */ |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 149 | spin_lock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 150 | list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { |
| 151 | /* |
| 152 | * Allow the received TMR to return with FUNCTION_COMPLETE. |
| 153 | */ |
| 154 | if (tmr && (tmr_p == tmr)) |
| 155 | continue; |
| 156 | |
| 157 | cmd = tmr_p->task_cmd; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 158 | if (!cmd) { |
| 159 | pr_err("Unable to locate struct se_cmd for TMR\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 160 | continue; |
| 161 | } |
| 162 | /* |
| 163 | * If this function was called with a valid pr_res_key |
| 164 | * parameter (eg: for PROUT PREEMPT_AND_ABORT service action |
| 165 | * skip non regisration key matching TMRs. |
| 166 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 167 | if (preempt_and_abort_list && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 168 | (core_scsi3_check_cdb_abort_and_preempt( |
| 169 | preempt_and_abort_list, cmd) != 0)) |
| 170 | continue; |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 171 | spin_unlock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 172 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 173 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 174 | if (!atomic_read(&cmd->t_transport_active)) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 175 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 176 | spin_lock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 177 | continue; |
| 178 | } |
| 179 | if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 180 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 181 | spin_lock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 182 | continue; |
| 183 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 184 | pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 185 | " Response: 0x%02x, t_state: %d\n", |
| 186 | (preempt_and_abort_list) ? "Preempt" : "", tmr_p, |
| 187 | tmr_p->function, tmr_p->response, cmd->t_state); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 188 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 189 | |
| 190 | transport_cmd_finish_abort_tmr(cmd); |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 191 | spin_lock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 192 | } |
Roland Dreier | 5e1be91 | 2011-07-20 09:28:56 +0000 | [diff] [blame] | 193 | spin_unlock_irq(&dev->se_tmr_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 194 | /* |
| 195 | * Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status. |
| 196 | * This is following sam4r17, section 5.6 Aborting commands, Table 38 |
| 197 | * for TMR LUN_RESET: |
| 198 | * |
| 199 | * a) "Yes" indicates that each command that is aborted on an I_T nexus |
| 200 | * other than the one that caused the SCSI device condition is |
| 201 | * completed with TASK ABORTED status, if the TAS bit is set to one in |
| 202 | * the Control mode page (see SPC-4). "No" indicates that no status is |
| 203 | * returned for aborted commands. |
| 204 | * |
| 205 | * d) If the logical unit reset is caused by a particular I_T nexus |
| 206 | * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" |
| 207 | * (TASK_ABORTED status) applies. |
| 208 | * |
| 209 | * Otherwise (e.g., if triggered by a hard reset), "no" |
| 210 | * (no TASK_ABORTED SAM status) applies. |
| 211 | * |
| 212 | * Note that this seems to be independent of TAS (Task Aborted Status) |
| 213 | * in the Control Mode Page. |
| 214 | */ |
| 215 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 216 | list_for_each_entry_safe(task, task_tmp, &dev->state_task_list, |
| 217 | t_state_list) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 218 | if (!task->task_se_cmd) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 219 | pr_err("task->task_se_cmd is NULL!\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 220 | continue; |
| 221 | } |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 222 | cmd = task->task_se_cmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 223 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 224 | /* |
| 225 | * For PREEMPT_AND_ABORT usage, only process commands |
| 226 | * with a matching reservation key. |
| 227 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 228 | if (preempt_and_abort_list && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 229 | (core_scsi3_check_cdb_abort_and_preempt( |
| 230 | preempt_and_abort_list, cmd) != 0)) |
| 231 | continue; |
| 232 | /* |
| 233 | * Not aborting PROUT PREEMPT_AND_ABORT CDB.. |
| 234 | */ |
| 235 | if (prout_cmd == cmd) |
| 236 | continue; |
| 237 | |
| 238 | list_del(&task->t_state_list); |
| 239 | atomic_set(&task->task_state_active, 0); |
| 240 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
| 241 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 242 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 243 | pr_debug("LUN_RESET: %s cmd: %p task: %p" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 244 | " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/" |
| 245 | "def_t_state: %d/%d cdb: 0x%02x\n", |
| 246 | (preempt_and_abort_list) ? "Preempt" : "", cmd, task, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 247 | cmd->se_tfo->get_task_tag(cmd), 0, |
| 248 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 249 | cmd->deferred_t_state, cmd->t_task_cdb[0]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 250 | pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 251 | " t_task_cdbs: %d t_task_cdbs_left: %d" |
| 252 | " t_task_cdbs_sent: %d -- t_transport_active: %d" |
| 253 | " t_transport_stop: %d t_transport_sent: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 254 | cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 255 | cmd->t_task_list_num, |
| 256 | atomic_read(&cmd->t_task_cdbs_left), |
| 257 | atomic_read(&cmd->t_task_cdbs_sent), |
| 258 | atomic_read(&cmd->t_transport_active), |
| 259 | atomic_read(&cmd->t_transport_stop), |
| 260 | atomic_read(&cmd->t_transport_sent)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 261 | |
| 262 | if (atomic_read(&task->task_active)) { |
| 263 | atomic_set(&task->task_stop, 1); |
| 264 | spin_unlock_irqrestore( |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 265 | &cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 266 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 267 | pr_debug("LUN_RESET: Waiting for task: %p to shutdown" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 268 | " for dev: %p\n", task, dev); |
| 269 | wait_for_completion(&task->task_stop_comp); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 270 | pr_debug("LUN_RESET Completed task: %p shutdown for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 271 | " dev: %p\n", task, dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 272 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 273 | atomic_dec(&cmd->t_task_cdbs_left); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 274 | |
| 275 | atomic_set(&task->task_active, 0); |
| 276 | atomic_set(&task->task_stop, 0); |
Nicholas Bellinger | 52208ae | 2011-02-24 16:58:20 -0800 | [diff] [blame] | 277 | } else { |
| 278 | if (atomic_read(&task->task_execute_queue) != 0) |
| 279 | transport_remove_task_from_execute_queue(task, dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 280 | } |
| 281 | __transport_stop_task_timer(task, &flags); |
| 282 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 283 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 284 | spin_unlock_irqrestore( |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 285 | &cmd->t_state_lock, flags); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 286 | pr_debug("LUN_RESET: Skipping task: %p, dev: %p for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 287 | " t_task_cdbs_ex_left: %d\n", task, dev, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 288 | atomic_read(&cmd->t_task_cdbs_ex_left)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 289 | |
| 290 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 291 | continue; |
| 292 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 293 | fe_count = atomic_read(&cmd->t_fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 294 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 295 | if (atomic_read(&cmd->t_transport_active)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 296 | pr_debug("LUN_RESET: got t_transport_active = 1 for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 297 | " task: %p, t_fe_count: %d dev: %p\n", task, |
| 298 | fe_count, dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 299 | atomic_set(&cmd->t_transport_aborted, 1); |
| 300 | spin_unlock_irqrestore(&cmd->t_state_lock, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 301 | flags); |
| 302 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
| 303 | |
| 304 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 305 | continue; |
| 306 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 307 | pr_debug("LUN_RESET: Got t_transport_active = 0 for task: %p," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 308 | " t_fe_count: %d dev: %p\n", task, fe_count, dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 309 | atomic_set(&cmd->t_transport_aborted, 1); |
| 310 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 311 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
| 312 | |
| 313 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 314 | } |
| 315 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
| 316 | /* |
| 317 | * Release all commands remaining in the struct se_device cmd queue. |
| 318 | * |
| 319 | * This follows the same logic as above for the struct se_device |
| 320 | * struct se_task state list, where commands are returned with |
| 321 | * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD |
| 322 | * reference, otherwise the struct se_cmd is released. |
| 323 | */ |
| 324 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 325 | list_for_each_entry_safe(cmd, tcmd, &qobj->qobj_list, se_queue_node) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 326 | /* |
| 327 | * For PREEMPT_AND_ABORT usage, only process commands |
| 328 | * with a matching reservation key. |
| 329 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 330 | if (preempt_and_abort_list && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 331 | (core_scsi3_check_cdb_abort_and_preempt( |
| 332 | preempt_and_abort_list, cmd) != 0)) |
| 333 | continue; |
| 334 | /* |
| 335 | * Not aborting PROUT PREEMPT_AND_ABORT CDB.. |
| 336 | */ |
| 337 | if (prout_cmd == cmd) |
| 338 | continue; |
| 339 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 340 | atomic_dec(&cmd->t_transport_queue_active); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 341 | atomic_dec(&qobj->queue_cnt); |
Roland Dreier | 79a7fef | 2011-09-28 22:12:07 -0700 | [diff] [blame^] | 342 | list_del_init(&cmd->se_queue_node); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 343 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
| 344 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 345 | pr_debug("LUN_RESET: %s from Device Queue: cmd: %p t_state:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 346 | " %d t_fe_count: %d\n", (preempt_and_abort_list) ? |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 347 | "Preempt" : "", cmd, cmd->t_state, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 348 | atomic_read(&cmd->t_fe_count)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 349 | /* |
| 350 | * Signal that the command has failed via cmd->se_cmd_flags, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 351 | */ |
| 352 | transport_new_cmd_failure(cmd); |
| 353 | |
| 354 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 355 | atomic_read(&cmd->t_fe_count)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 356 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); |
| 357 | } |
| 358 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
| 359 | /* |
| 360 | * Clear any legacy SPC-2 reservation when called during |
| 361 | * LOGICAL UNIT RESET |
| 362 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 363 | if (!preempt_and_abort_list && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 364 | (dev->dev_flags & DF_SPC2_RESERVATIONS)) { |
| 365 | spin_lock(&dev->dev_reservation_lock); |
| 366 | dev->dev_reserved_node_acl = NULL; |
| 367 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS; |
| 368 | spin_unlock(&dev->dev_reservation_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 369 | pr_debug("LUN_RESET: SCSI-2 Released reservation\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 370 | } |
| 371 | |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 372 | spin_lock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 373 | dev->num_resets++; |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 374 | spin_unlock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 375 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 376 | pr_debug("LUN_RESET: %s for [%s] Complete\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 377 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 378 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 379 | return 0; |
| 380 | } |