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 | |
| 27 | #include <linux/version.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/spinlock.h> |
| 30 | #include <linux/list.h> |
| 31 | #include <scsi/scsi.h> |
| 32 | #include <scsi/scsi_cmnd.h> |
| 33 | |
| 34 | #include <target/target_core_base.h> |
| 35 | #include <target/target_core_device.h> |
| 36 | #include <target/target_core_tmr.h> |
| 37 | #include <target/target_core_transport.h> |
| 38 | #include <target/target_core_fabric_ops.h> |
| 39 | #include <target/target_core_configfs.h> |
| 40 | |
| 41 | #include "target_core_alua.h" |
| 42 | #include "target_core_pr.h" |
| 43 | |
| 44 | #define DEBUG_LUN_RESET |
| 45 | #ifdef DEBUG_LUN_RESET |
| 46 | #define DEBUG_LR(x...) printk(KERN_INFO x) |
| 47 | #else |
| 48 | #define DEBUG_LR(x...) |
| 49 | #endif |
| 50 | |
| 51 | struct se_tmr_req *core_tmr_alloc_req( |
| 52 | struct se_cmd *se_cmd, |
| 53 | void *fabric_tmr_ptr, |
| 54 | u8 function) |
| 55 | { |
| 56 | struct se_tmr_req *tmr; |
| 57 | |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 58 | tmr = kmem_cache_zalloc(se_tmr_req_cache, (in_interrupt()) ? |
| 59 | GFP_ATOMIC : GFP_KERNEL); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 60 | if (!(tmr)) { |
| 61 | printk(KERN_ERR "Unable to allocate struct se_tmr_req\n"); |
| 62 | return ERR_PTR(-ENOMEM); |
| 63 | } |
| 64 | tmr->task_cmd = se_cmd; |
| 65 | tmr->fabric_tmr_ptr = fabric_tmr_ptr; |
| 66 | tmr->function = function; |
| 67 | INIT_LIST_HEAD(&tmr->tmr_list); |
| 68 | |
| 69 | return tmr; |
| 70 | } |
| 71 | EXPORT_SYMBOL(core_tmr_alloc_req); |
| 72 | |
| 73 | void core_tmr_release_req( |
| 74 | struct se_tmr_req *tmr) |
| 75 | { |
| 76 | struct se_device *dev = tmr->tmr_dev; |
| 77 | |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 78 | if (!dev) { |
| 79 | kmem_cache_free(se_tmr_req_cache, tmr); |
| 80 | return; |
| 81 | } |
| 82 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 83 | spin_lock(&dev->se_tmr_lock); |
| 84 | list_del(&tmr->tmr_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 85 | spin_unlock(&dev->se_tmr_lock); |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 86 | |
| 87 | kmem_cache_free(se_tmr_req_cache, tmr); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | static void core_tmr_handle_tas_abort( |
| 91 | struct se_node_acl *tmr_nacl, |
| 92 | struct se_cmd *cmd, |
| 93 | int tas, |
| 94 | int fe_count) |
| 95 | { |
| 96 | if (!(fe_count)) { |
| 97 | transport_cmd_finish_abort(cmd, 1); |
| 98 | return; |
| 99 | } |
| 100 | /* |
| 101 | * TASK ABORTED status (TAS) bit support |
| 102 | */ |
| 103 | if (((tmr_nacl != NULL) && |
| 104 | (tmr_nacl == cmd->se_sess->se_node_acl)) || tas) |
| 105 | transport_send_task_abort(cmd); |
| 106 | |
| 107 | transport_cmd_finish_abort(cmd, 0); |
| 108 | } |
| 109 | |
| 110 | int core_tmr_lun_reset( |
| 111 | struct se_device *dev, |
| 112 | struct se_tmr_req *tmr, |
| 113 | struct list_head *preempt_and_abort_list, |
| 114 | struct se_cmd *prout_cmd) |
| 115 | { |
| 116 | struct se_cmd *cmd; |
| 117 | struct se_queue_req *qr, *qr_tmp; |
| 118 | struct se_node_acl *tmr_nacl = NULL; |
| 119 | struct se_portal_group *tmr_tpg = NULL; |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 120 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | struct se_tmr_req *tmr_p, *tmr_pp; |
| 122 | struct se_task *task, *task_tmp; |
| 123 | unsigned long flags; |
| 124 | int fe_count, state, tas; |
| 125 | /* |
| 126 | * TASK_ABORTED status bit, this is configurable via ConfigFS |
| 127 | * struct se_device attributes. spc4r17 section 7.4.6 Control mode page |
| 128 | * |
| 129 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 130 | * tasks shall be terminated by the device server without any response |
| 131 | * to the application client. A TAS bit set to one specifies that tasks |
| 132 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 133 | * which the command was received shall be completed with TASK ABORTED |
| 134 | * status (see SAM-4). |
| 135 | */ |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 136 | tas = dev->se_sub_dev->se_dev_attrib.emulate_tas; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 137 | /* |
| 138 | * Determine if this se_tmr is coming from a $FABRIC_MOD |
| 139 | * or struct se_device passthrough.. |
| 140 | */ |
| 141 | if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { |
| 142 | tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; |
| 143 | tmr_tpg = tmr->task_cmd->se_sess->se_tpg; |
| 144 | if (tmr_nacl && tmr_tpg) { |
| 145 | DEBUG_LR("LUN_RESET: TMR caller fabric: %s" |
| 146 | " initiator port %s\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 147 | tmr_tpg->se_tpg_tfo->get_fabric_name(), |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 148 | tmr_nacl->initiatorname); |
| 149 | } |
| 150 | } |
| 151 | DEBUG_LR("LUN_RESET: %s starting for [%s], tas: %d\n", |
| 152 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 153 | dev->transport->name, tas); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 154 | /* |
| 155 | * Release all pending and outgoing TMRs aside from the received |
| 156 | * LUN_RESET tmr.. |
| 157 | */ |
| 158 | spin_lock(&dev->se_tmr_lock); |
| 159 | list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { |
| 160 | /* |
| 161 | * Allow the received TMR to return with FUNCTION_COMPLETE. |
| 162 | */ |
| 163 | if (tmr && (tmr_p == tmr)) |
| 164 | continue; |
| 165 | |
| 166 | cmd = tmr_p->task_cmd; |
| 167 | if (!(cmd)) { |
| 168 | printk(KERN_ERR "Unable to locate struct se_cmd for TMR\n"); |
| 169 | continue; |
| 170 | } |
| 171 | /* |
| 172 | * If this function was called with a valid pr_res_key |
| 173 | * parameter (eg: for PROUT PREEMPT_AND_ABORT service action |
| 174 | * skip non regisration key matching TMRs. |
| 175 | */ |
| 176 | if ((preempt_and_abort_list != NULL) && |
| 177 | (core_scsi3_check_cdb_abort_and_preempt( |
| 178 | preempt_and_abort_list, cmd) != 0)) |
| 179 | continue; |
| 180 | spin_unlock(&dev->se_tmr_lock); |
| 181 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 182 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
| 183 | if (!(atomic_read(&cmd->t_task->t_transport_active))) { |
| 184 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 185 | spin_lock(&dev->se_tmr_lock); |
| 186 | continue; |
| 187 | } |
| 188 | if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 189 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 190 | spin_lock(&dev->se_tmr_lock); |
| 191 | continue; |
| 192 | } |
| 193 | DEBUG_LR("LUN_RESET: %s releasing TMR %p Function: 0x%02x," |
| 194 | " Response: 0x%02x, t_state: %d\n", |
| 195 | (preempt_and_abort_list) ? "Preempt" : "", tmr_p, |
| 196 | tmr_p->function, tmr_p->response, cmd->t_state); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 197 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 198 | |
| 199 | transport_cmd_finish_abort_tmr(cmd); |
| 200 | spin_lock(&dev->se_tmr_lock); |
| 201 | } |
| 202 | spin_unlock(&dev->se_tmr_lock); |
| 203 | /* |
| 204 | * Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status. |
| 205 | * This is following sam4r17, section 5.6 Aborting commands, Table 38 |
| 206 | * for TMR LUN_RESET: |
| 207 | * |
| 208 | * a) "Yes" indicates that each command that is aborted on an I_T nexus |
| 209 | * other than the one that caused the SCSI device condition is |
| 210 | * completed with TASK ABORTED status, if the TAS bit is set to one in |
| 211 | * the Control mode page (see SPC-4). "No" indicates that no status is |
| 212 | * returned for aborted commands. |
| 213 | * |
| 214 | * d) If the logical unit reset is caused by a particular I_T nexus |
| 215 | * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" |
| 216 | * (TASK_ABORTED status) applies. |
| 217 | * |
| 218 | * Otherwise (e.g., if triggered by a hard reset), "no" |
| 219 | * (no TASK_ABORTED SAM status) applies. |
| 220 | * |
| 221 | * Note that this seems to be independent of TAS (Task Aborted Status) |
| 222 | * in the Control Mode Page. |
| 223 | */ |
| 224 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 225 | list_for_each_entry_safe(task, task_tmp, &dev->state_task_list, |
| 226 | t_state_list) { |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 227 | if (!task->task_se_cmd) { |
| 228 | printk(KERN_ERR "task->task_se_cmd is NULL!\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 229 | continue; |
| 230 | } |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 231 | cmd = task->task_se_cmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 232 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 233 | if (!cmd->t_task) { |
| 234 | printk(KERN_ERR "cmd->t_task is NULL for task: %p cmd:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 235 | " %p ITT: 0x%08x\n", task, cmd, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 236 | cmd->se_tfo->get_task_tag(cmd)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 237 | continue; |
| 238 | } |
| 239 | /* |
| 240 | * For PREEMPT_AND_ABORT usage, only process commands |
| 241 | * with a matching reservation key. |
| 242 | */ |
| 243 | if ((preempt_and_abort_list != NULL) && |
| 244 | (core_scsi3_check_cdb_abort_and_preempt( |
| 245 | preempt_and_abort_list, cmd) != 0)) |
| 246 | continue; |
| 247 | /* |
| 248 | * Not aborting PROUT PREEMPT_AND_ABORT CDB.. |
| 249 | */ |
| 250 | if (prout_cmd == cmd) |
| 251 | continue; |
| 252 | |
| 253 | list_del(&task->t_state_list); |
| 254 | atomic_set(&task->task_state_active, 0); |
| 255 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
| 256 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 257 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 258 | DEBUG_LR("LUN_RESET: %s cmd: %p task: %p" |
| 259 | " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/" |
| 260 | "def_t_state: %d/%d cdb: 0x%02x\n", |
| 261 | (preempt_and_abort_list) ? "Preempt" : "", cmd, task, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 262 | cmd->se_tfo->get_task_tag(cmd), 0, |
| 263 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, |
| 264 | cmd->deferred_t_state, cmd->t_task->t_task_cdb[0]); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 265 | DEBUG_LR("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" |
| 266 | " t_task_cdbs: %d t_task_cdbs_left: %d" |
| 267 | " t_task_cdbs_sent: %d -- t_transport_active: %d" |
| 268 | " t_transport_stop: %d t_transport_sent: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 269 | cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key, |
| 270 | cmd->t_task->t_task_cdbs, |
| 271 | atomic_read(&cmd->t_task->t_task_cdbs_left), |
| 272 | atomic_read(&cmd->t_task->t_task_cdbs_sent), |
| 273 | atomic_read(&cmd->t_task->t_transport_active), |
| 274 | atomic_read(&cmd->t_task->t_transport_stop), |
| 275 | atomic_read(&cmd->t_task->t_transport_sent)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 276 | |
| 277 | if (atomic_read(&task->task_active)) { |
| 278 | atomic_set(&task->task_stop, 1); |
| 279 | spin_unlock_irqrestore( |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 280 | &cmd->t_task->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 281 | |
| 282 | DEBUG_LR("LUN_RESET: Waiting for task: %p to shutdown" |
| 283 | " for dev: %p\n", task, dev); |
| 284 | wait_for_completion(&task->task_stop_comp); |
| 285 | DEBUG_LR("LUN_RESET Completed task: %p shutdown for" |
| 286 | " dev: %p\n", task, dev); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 287 | spin_lock_irqsave(&cmd->t_task->t_state_lock, flags); |
| 288 | atomic_dec(&cmd->t_task->t_task_cdbs_left); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 289 | |
| 290 | atomic_set(&task->task_active, 0); |
| 291 | atomic_set(&task->task_stop, 0); |
Nicholas Bellinger | 52208ae | 2011-02-24 16:58:20 -0800 | [diff] [blame] | 292 | } else { |
| 293 | if (atomic_read(&task->task_execute_queue) != 0) |
| 294 | transport_remove_task_from_execute_queue(task, dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 295 | } |
| 296 | __transport_stop_task_timer(task, &flags); |
| 297 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 298 | if (!(atomic_dec_and_test(&cmd->t_task->t_task_cdbs_ex_left))) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 299 | spin_unlock_irqrestore( |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 300 | &cmd->t_task->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 301 | DEBUG_LR("LUN_RESET: Skipping task: %p, dev: %p for" |
| 302 | " t_task_cdbs_ex_left: %d\n", task, dev, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 303 | atomic_read(&cmd->t_task->t_task_cdbs_ex_left)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 304 | |
| 305 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 306 | continue; |
| 307 | } |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 308 | fe_count = atomic_read(&cmd->t_task->t_fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 309 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 310 | if (atomic_read(&cmd->t_task->t_transport_active)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 311 | DEBUG_LR("LUN_RESET: got t_transport_active = 1 for" |
| 312 | " task: %p, t_fe_count: %d dev: %p\n", task, |
| 313 | fe_count, dev); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 314 | atomic_set(&cmd->t_task->t_transport_aborted, 1); |
| 315 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 316 | flags); |
| 317 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
| 318 | |
| 319 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 320 | continue; |
| 321 | } |
| 322 | DEBUG_LR("LUN_RESET: Got t_transport_active = 0 for task: %p," |
| 323 | " t_fe_count: %d dev: %p\n", task, fe_count, dev); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 324 | atomic_set(&cmd->t_task->t_transport_aborted, 1); |
| 325 | spin_unlock_irqrestore(&cmd->t_task->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 326 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
| 327 | |
| 328 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
| 329 | } |
| 330 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
| 331 | /* |
| 332 | * Release all commands remaining in the struct se_device cmd queue. |
| 333 | * |
| 334 | * This follows the same logic as above for the struct se_device |
| 335 | * struct se_task state list, where commands are returned with |
| 336 | * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD |
| 337 | * reference, otherwise the struct se_cmd is released. |
| 338 | */ |
| 339 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); |
| 340 | list_for_each_entry_safe(qr, qr_tmp, &qobj->qobj_list, qr_list) { |
| 341 | cmd = (struct se_cmd *)qr->cmd; |
| 342 | if (!(cmd)) { |
| 343 | /* |
| 344 | * Skip these for non PREEMPT_AND_ABORT usage.. |
| 345 | */ |
| 346 | if (preempt_and_abort_list != NULL) |
| 347 | continue; |
| 348 | |
| 349 | atomic_dec(&qobj->queue_cnt); |
| 350 | list_del(&qr->qr_list); |
| 351 | kfree(qr); |
| 352 | continue; |
| 353 | } |
| 354 | /* |
| 355 | * For PREEMPT_AND_ABORT usage, only process commands |
| 356 | * with a matching reservation key. |
| 357 | */ |
| 358 | if ((preempt_and_abort_list != NULL) && |
| 359 | (core_scsi3_check_cdb_abort_and_preempt( |
| 360 | preempt_and_abort_list, cmd) != 0)) |
| 361 | continue; |
| 362 | /* |
| 363 | * Not aborting PROUT PREEMPT_AND_ABORT CDB.. |
| 364 | */ |
| 365 | if (prout_cmd == cmd) |
| 366 | continue; |
| 367 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 368 | atomic_dec(&cmd->t_task->t_transport_queue_active); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 369 | atomic_dec(&qobj->queue_cnt); |
| 370 | list_del(&qr->qr_list); |
| 371 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
| 372 | |
| 373 | state = qr->state; |
| 374 | kfree(qr); |
| 375 | |
| 376 | DEBUG_LR("LUN_RESET: %s from Device Queue: cmd: %p t_state:" |
| 377 | " %d t_fe_count: %d\n", (preempt_and_abort_list) ? |
| 378 | "Preempt" : "", cmd, state, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 379 | atomic_read(&cmd->t_task->t_fe_count)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 380 | /* |
| 381 | * Signal that the command has failed via cmd->se_cmd_flags, |
| 382 | * and call TFO->new_cmd_failure() to wakeup any fabric |
| 383 | * dependent code used to wait for unsolicited data out |
| 384 | * allocation to complete. The fabric module is expected |
| 385 | * to dump any remaining unsolicited data out for the aborted |
| 386 | * command at this point. |
| 387 | */ |
| 388 | transport_new_cmd_failure(cmd); |
| 389 | |
| 390 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 391 | atomic_read(&cmd->t_task->t_fe_count)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 392 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); |
| 393 | } |
| 394 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
| 395 | /* |
| 396 | * Clear any legacy SPC-2 reservation when called during |
| 397 | * LOGICAL UNIT RESET |
| 398 | */ |
| 399 | if (!(preempt_and_abort_list) && |
| 400 | (dev->dev_flags & DF_SPC2_RESERVATIONS)) { |
| 401 | spin_lock(&dev->dev_reservation_lock); |
| 402 | dev->dev_reserved_node_acl = NULL; |
| 403 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS; |
| 404 | spin_unlock(&dev->dev_reservation_lock); |
| 405 | printk(KERN_INFO "LUN_RESET: SCSI-2 Released reservation\n"); |
| 406 | } |
| 407 | |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 408 | spin_lock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 409 | dev->num_resets++; |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 410 | spin_unlock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 411 | |
| 412 | DEBUG_LR("LUN_RESET: %s for [%s] Complete\n", |
| 413 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame^] | 414 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 415 | return 0; |
| 416 | } |