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> |
Paul Gortmaker | c53181a | 2011-08-30 18:16:43 -0400 | [diff] [blame] | 30 | #include <linux/export.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 31 | #include <scsi/scsi.h> |
| 32 | #include <scsi/scsi_cmnd.h> |
| 33 | |
| 34 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 35 | #include <target/target_core_backend.h> |
| 36 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 37 | #include <target/target_core_configfs.h> |
| 38 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 39 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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, |
Roland Dreier | dd503a5 | 2011-10-06 09:56:16 -0700 | [diff] [blame] | 46 | u8 function, |
| 47 | gfp_t gfp_flags) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 48 | { |
| 49 | struct se_tmr_req *tmr; |
| 50 | |
Roland Dreier | dd503a5 | 2011-10-06 09:56:16 -0700 | [diff] [blame] | 51 | tmr = kmem_cache_zalloc(se_tmr_req_cache, gfp_flags); |
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; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 69 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 70 | |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 71 | if (!dev) { |
| 72 | kmem_cache_free(se_tmr_req_cache, tmr); |
| 73 | return; |
| 74 | } |
| 75 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 76 | spin_lock_irqsave(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 77 | list_del(&tmr->tmr_list); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 78 | spin_unlock_irqrestore(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 79 | |
| 80 | kmem_cache_free(se_tmr_req_cache, tmr); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | static void core_tmr_handle_tas_abort( |
| 84 | struct se_node_acl *tmr_nacl, |
| 85 | struct se_cmd *cmd, |
| 86 | int tas, |
| 87 | int fe_count) |
| 88 | { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 89 | if (!fe_count) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 90 | transport_cmd_finish_abort(cmd, 1); |
| 91 | return; |
| 92 | } |
| 93 | /* |
| 94 | * TASK ABORTED status (TAS) bit support |
| 95 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 96 | if ((tmr_nacl && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 97 | (tmr_nacl == cmd->se_sess->se_node_acl)) || tas) |
| 98 | transport_send_task_abort(cmd); |
| 99 | |
| 100 | transport_cmd_finish_abort(cmd, 0); |
| 101 | } |
| 102 | |
Jörn Engel | c165f69 | 2011-11-24 02:04:42 +0100 | [diff] [blame^] | 103 | static int core_scsi3_check_cdb_abort_and_preempt( |
| 104 | struct list_head *preempt_and_abort_list, |
| 105 | struct se_cmd *cmd) |
| 106 | { |
| 107 | struct t10_pr_registration *pr_reg, *pr_reg_tmp; |
| 108 | |
| 109 | list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list, |
| 110 | pr_reg_abort_list) { |
| 111 | if (pr_reg->pr_res_key == cmd->pr_res_key) |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | return 1; |
| 116 | } |
| 117 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 118 | static void core_tmr_drain_tmr_list( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 119 | struct se_device *dev, |
| 120 | struct se_tmr_req *tmr, |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 121 | struct list_head *preempt_and_abort_list) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 122 | { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 123 | LIST_HEAD(drain_tmr_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 124 | struct se_tmr_req *tmr_p, *tmr_pp; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 125 | struct se_cmd *cmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 126 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 127 | /* |
| 128 | * Release all pending and outgoing TMRs aside from the received |
| 129 | * LUN_RESET tmr.. |
| 130 | */ |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 131 | spin_lock_irqsave(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 132 | list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { |
| 133 | /* |
| 134 | * Allow the received TMR to return with FUNCTION_COMPLETE. |
| 135 | */ |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 136 | if (tmr_p == tmr) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 137 | continue; |
| 138 | |
| 139 | cmd = tmr_p->task_cmd; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 140 | if (!cmd) { |
| 141 | pr_err("Unable to locate struct se_cmd for TMR\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 142 | continue; |
| 143 | } |
| 144 | /* |
| 145 | * If this function was called with a valid pr_res_key |
| 146 | * parameter (eg: for PROUT PREEMPT_AND_ABORT service action |
| 147 | * skip non regisration key matching TMRs. |
| 148 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 149 | if (preempt_and_abort_list && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 150 | (core_scsi3_check_cdb_abort_and_preempt( |
| 151 | preempt_and_abort_list, cmd) != 0)) |
| 152 | continue; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 153 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 154 | spin_lock(&cmd->t_state_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 155 | if (!atomic_read(&cmd->t_transport_active)) { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 156 | spin_unlock(&cmd->t_state_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 157 | continue; |
| 158 | } |
| 159 | if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 160 | spin_unlock(&cmd->t_state_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 161 | continue; |
| 162 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 163 | spin_unlock(&cmd->t_state_lock); |
| 164 | |
Joern Engel | 6eb40b2 | 2011-10-26 13:37:56 -0700 | [diff] [blame] | 165 | list_move_tail(&tmr_p->tmr_list, &drain_tmr_list); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 166 | } |
| 167 | spin_unlock_irqrestore(&dev->se_tmr_lock, flags); |
| 168 | |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 169 | list_for_each_entry_safe(tmr_p, tmr_pp, &drain_tmr_list, tmr_list) { |
Joern Engel | b8a11d7 | 2011-10-27 15:44:46 -0700 | [diff] [blame] | 170 | list_del_init(&tmr_p->tmr_list); |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 171 | cmd = tmr_p->task_cmd; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 172 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 173 | pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 174 | " Response: 0x%02x, t_state: %d\n", |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 175 | (preempt_and_abort_list) ? "Preempt" : "", tmr_p, |
| 176 | tmr_p->function, tmr_p->response, cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 177 | |
Nicholas Bellinger | 8dc52b5 | 2011-10-09 02:02:51 -0700 | [diff] [blame] | 178 | transport_cmd_finish_abort(cmd, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 179 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 180 | } |
| 181 | |
| 182 | static void core_tmr_drain_task_list( |
| 183 | struct se_device *dev, |
| 184 | struct se_cmd *prout_cmd, |
| 185 | struct se_node_acl *tmr_nacl, |
| 186 | int tas, |
| 187 | struct list_head *preempt_and_abort_list) |
| 188 | { |
| 189 | LIST_HEAD(drain_task_list); |
| 190 | struct se_cmd *cmd; |
| 191 | struct se_task *task, *task_tmp; |
| 192 | unsigned long flags; |
| 193 | int fe_count; |
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 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 238 | list_move_tail(&task->t_state_list, &drain_task_list); |
Christoph Hellwig | 1880807a | 2011-11-23 06:54:36 -0500 | [diff] [blame] | 239 | task->t_state_active = false; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 240 | /* |
| 241 | * Remove from task execute list before processing drain_task_list |
| 242 | */ |
Christoph Hellwig | 04629b7 | 2011-10-12 11:07:04 -0400 | [diff] [blame] | 243 | if (!list_empty(&task->t_execute_list)) |
| 244 | __transport_remove_task_from_execute_queue(task, dev); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 245 | } |
| 246 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
| 247 | |
| 248 | while (!list_empty(&drain_task_list)) { |
| 249 | task = list_entry(drain_task_list.next, struct se_task, t_state_list); |
| 250 | list_del(&task->t_state_list); |
| 251 | cmd = task->task_se_cmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 252 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 253 | pr_debug("LUN_RESET: %s cmd: %p task: %p" |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 254 | " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state: %d" |
| 255 | "cdb: 0x%02x\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 256 | (preempt_and_abort_list) ? "Preempt" : "", cmd, task, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 257 | cmd->se_tfo->get_task_tag(cmd), 0, |
| 258 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 259 | cmd->t_task_cdb[0]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 260 | pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 261 | " t_task_cdbs: %d t_task_cdbs_left: %d" |
| 262 | " t_task_cdbs_sent: %d -- t_transport_active: %d" |
| 263 | " t_transport_stop: %d t_transport_sent: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 264 | cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 265 | cmd->t_task_list_num, |
| 266 | atomic_read(&cmd->t_task_cdbs_left), |
| 267 | atomic_read(&cmd->t_task_cdbs_sent), |
| 268 | atomic_read(&cmd->t_transport_active), |
| 269 | atomic_read(&cmd->t_transport_stop), |
| 270 | atomic_read(&cmd->t_transport_sent)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 271 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 272 | /* |
| 273 | * If the command may be queued onto a workqueue cancel it now. |
| 274 | * |
| 275 | * This is equivalent to removal from the execute queue in the |
| 276 | * loop above, but we do it down here given that |
| 277 | * cancel_work_sync may block. |
| 278 | */ |
| 279 | if (cmd->t_state == TRANSPORT_COMPLETE) |
| 280 | cancel_work_sync(&cmd->work); |
| 281 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 282 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
| 283 | target_stop_task(task, &flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 284 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 285 | if (!atomic_dec_and_test(&cmd->t_task_cdbs_ex_left)) { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 286 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 287 | pr_debug("LUN_RESET: Skipping task: %p, dev: %p for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 288 | " t_task_cdbs_ex_left: %d\n", task, dev, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 289 | atomic_read(&cmd->t_task_cdbs_ex_left)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 290 | continue; |
| 291 | } |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 292 | fe_count = atomic_read(&cmd->t_fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 293 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 294 | if (atomic_read(&cmd->t_transport_active)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 295 | pr_debug("LUN_RESET: got t_transport_active = 1 for" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 296 | " task: %p, t_fe_count: %d dev: %p\n", task, |
| 297 | fe_count, dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 298 | atomic_set(&cmd->t_transport_aborted, 1); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 299 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 300 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 301 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 302 | continue; |
| 303 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 304 | pr_debug("LUN_RESET: Got t_transport_active = 0 for task: %p," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 305 | " t_fe_count: %d dev: %p\n", task, fe_count, dev); |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 306 | atomic_set(&cmd->t_transport_aborted, 1); |
| 307 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 308 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 309 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 310 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | static void core_tmr_drain_cmd_list( |
| 314 | struct se_device *dev, |
| 315 | struct se_cmd *prout_cmd, |
| 316 | struct se_node_acl *tmr_nacl, |
| 317 | int tas, |
| 318 | struct list_head *preempt_and_abort_list) |
| 319 | { |
| 320 | LIST_HEAD(drain_cmd_list); |
| 321 | struct se_queue_obj *qobj = &dev->dev_queue_obj; |
| 322 | struct se_cmd *cmd, *tcmd; |
| 323 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 324 | /* |
| 325 | * Release all commands remaining in the struct se_device cmd queue. |
| 326 | * |
| 327 | * This follows the same logic as above for the struct se_device |
| 328 | * struct se_task state list, where commands are returned with |
| 329 | * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD |
| 330 | * reference, otherwise the struct se_cmd is released. |
| 331 | */ |
| 332 | spin_lock_irqsave(&qobj->cmd_queue_lock, flags); |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 333 | 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] | 334 | /* |
| 335 | * For PREEMPT_AND_ABORT usage, only process commands |
| 336 | * with a matching reservation key. |
| 337 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 338 | if (preempt_and_abort_list && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 339 | (core_scsi3_check_cdb_abort_and_preempt( |
| 340 | preempt_and_abort_list, cmd) != 0)) |
| 341 | continue; |
| 342 | /* |
| 343 | * Not aborting PROUT PREEMPT_AND_ABORT CDB.. |
| 344 | */ |
| 345 | if (prout_cmd == cmd) |
| 346 | continue; |
| 347 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 348 | atomic_set(&cmd->t_transport_queue_active, 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 349 | atomic_dec(&qobj->queue_cnt); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 350 | list_move_tail(&cmd->se_queue_node, &drain_cmd_list); |
| 351 | } |
| 352 | spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags); |
| 353 | |
| 354 | while (!list_empty(&drain_cmd_list)) { |
| 355 | cmd = list_entry(drain_cmd_list.next, struct se_cmd, se_queue_node); |
Roland Dreier | 79a7fef | 2011-09-28 22:12:07 -0700 | [diff] [blame] | 356 | list_del_init(&cmd->se_queue_node); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 357 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 358 | pr_debug("LUN_RESET: %s from Device Queue: cmd: %p t_state:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 359 | " %d t_fe_count: %d\n", (preempt_and_abort_list) ? |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 360 | "Preempt" : "", cmd, cmd->t_state, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 361 | atomic_read(&cmd->t_fe_count)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 362 | |
| 363 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 364 | atomic_read(&cmd->t_fe_count)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 365 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | int core_tmr_lun_reset( |
| 369 | struct se_device *dev, |
| 370 | struct se_tmr_req *tmr, |
| 371 | struct list_head *preempt_and_abort_list, |
| 372 | struct se_cmd *prout_cmd) |
| 373 | { |
| 374 | struct se_node_acl *tmr_nacl = NULL; |
| 375 | struct se_portal_group *tmr_tpg = NULL; |
| 376 | int tas; |
| 377 | /* |
| 378 | * TASK_ABORTED status bit, this is configurable via ConfigFS |
| 379 | * struct se_device attributes. spc4r17 section 7.4.6 Control mode page |
| 380 | * |
| 381 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 382 | * tasks shall be terminated by the device server without any response |
| 383 | * to the application client. A TAS bit set to one specifies that tasks |
| 384 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 385 | * which the command was received shall be completed with TASK ABORTED |
| 386 | * status (see SAM-4). |
| 387 | */ |
| 388 | tas = dev->se_sub_dev->se_dev_attrib.emulate_tas; |
| 389 | /* |
| 390 | * Determine if this se_tmr is coming from a $FABRIC_MOD |
| 391 | * or struct se_device passthrough.. |
| 392 | */ |
| 393 | if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { |
| 394 | tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; |
| 395 | tmr_tpg = tmr->task_cmd->se_sess->se_tpg; |
| 396 | if (tmr_nacl && tmr_tpg) { |
| 397 | pr_debug("LUN_RESET: TMR caller fabric: %s" |
| 398 | " initiator port %s\n", |
| 399 | tmr_tpg->se_tpg_tfo->get_fabric_name(), |
| 400 | tmr_nacl->initiatorname); |
| 401 | } |
| 402 | } |
| 403 | pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n", |
| 404 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
| 405 | dev->transport->name, tas); |
| 406 | |
| 407 | core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list); |
| 408 | core_tmr_drain_task_list(dev, prout_cmd, tmr_nacl, tas, |
| 409 | preempt_and_abort_list); |
| 410 | core_tmr_drain_cmd_list(dev, prout_cmd, tmr_nacl, tas, |
| 411 | preempt_and_abort_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 412 | /* |
| 413 | * Clear any legacy SPC-2 reservation when called during |
| 414 | * LOGICAL UNIT RESET |
| 415 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 416 | if (!preempt_and_abort_list && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 417 | (dev->dev_flags & DF_SPC2_RESERVATIONS)) { |
| 418 | spin_lock(&dev->dev_reservation_lock); |
| 419 | dev->dev_reserved_node_acl = NULL; |
| 420 | dev->dev_flags &= ~DF_SPC2_RESERVATIONS; |
| 421 | spin_unlock(&dev->dev_reservation_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 422 | pr_debug("LUN_RESET: SCSI-2 Released reservation\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 423 | } |
| 424 | |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 425 | spin_lock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 426 | dev->num_resets++; |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 427 | spin_unlock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 428 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 429 | pr_debug("LUN_RESET: %s for [%s] Complete\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 430 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 431 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 432 | return 0; |
| 433 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 434 | |