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 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 6 | * (c) Copyright 2009-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 7 | * |
| 8 | * Nicholas A. Bellinger <nab@kernel.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 23 | * |
| 24 | ******************************************************************************/ |
| 25 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 26 | #include <linux/slab.h> |
| 27 | #include <linux/spinlock.h> |
| 28 | #include <linux/list.h> |
Paul Gortmaker | c53181a | 2011-08-30 18:16:43 -0400 | [diff] [blame] | 29 | #include <linux/export.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 30 | |
| 31 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 32 | #include <target/target_core_backend.h> |
| 33 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 34 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 35 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | #include "target_core_alua.h" |
| 37 | #include "target_core_pr.h" |
| 38 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 39 | int core_tmr_alloc_req( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 40 | struct se_cmd *se_cmd, |
| 41 | void *fabric_tmr_ptr, |
Roland Dreier | dd503a5 | 2011-10-06 09:56:16 -0700 | [diff] [blame] | 42 | u8 function, |
| 43 | gfp_t gfp_flags) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 44 | { |
| 45 | struct se_tmr_req *tmr; |
| 46 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 47 | tmr = kzalloc(sizeof(struct se_tmr_req), gfp_flags); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 48 | if (!tmr) { |
| 49 | pr_err("Unable to allocate struct se_tmr_req\n"); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 50 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 51 | } |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 52 | |
| 53 | se_cmd->se_cmd_flags |= SCF_SCSI_TMR_CDB; |
| 54 | se_cmd->se_tmr_req = tmr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 55 | tmr->task_cmd = se_cmd; |
| 56 | tmr->fabric_tmr_ptr = fabric_tmr_ptr; |
| 57 | tmr->function = function; |
| 58 | INIT_LIST_HEAD(&tmr->tmr_list); |
| 59 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 60 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 61 | } |
| 62 | EXPORT_SYMBOL(core_tmr_alloc_req); |
| 63 | |
Joern Engel | 8f83269 | 2014-09-16 16:23:10 -0400 | [diff] [blame] | 64 | void core_tmr_release_req(struct se_tmr_req *tmr) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 65 | { |
| 66 | struct se_device *dev = tmr->tmr_dev; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 67 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 68 | |
Joern Engel | 8f83269 | 2014-09-16 16:23:10 -0400 | [diff] [blame] | 69 | if (dev) { |
| 70 | spin_lock_irqsave(&dev->se_tmr_lock, flags); |
| 71 | list_del(&tmr->tmr_list); |
| 72 | spin_unlock_irqrestore(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 73 | } |
| 74 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 75 | kfree(tmr); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | static void core_tmr_handle_tas_abort( |
| 79 | struct se_node_acl *tmr_nacl, |
| 80 | struct se_cmd *cmd, |
Nicholas Bellinger | c1c35d5 | 2013-06-06 02:00:06 -0700 | [diff] [blame] | 81 | int tas) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 82 | { |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 83 | bool remove = true; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 84 | /* |
| 85 | * TASK ABORTED status (TAS) bit support |
Joern Engel | 8f83269 | 2014-09-16 16:23:10 -0400 | [diff] [blame] | 86 | */ |
| 87 | if ((tmr_nacl && (tmr_nacl != cmd->se_sess->se_node_acl)) && tas) { |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 88 | remove = false; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 89 | transport_send_task_abort(cmd); |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 90 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 91 | |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 92 | transport_cmd_finish_abort(cmd, remove); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 93 | } |
| 94 | |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 95 | static int target_check_cdb_and_preempt(struct list_head *list, |
| 96 | struct se_cmd *cmd) |
Jörn Engel | c165f69 | 2011-11-24 02:04:42 +0100 | [diff] [blame] | 97 | { |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 98 | struct t10_pr_registration *reg; |
Jörn Engel | c165f69 | 2011-11-24 02:04:42 +0100 | [diff] [blame] | 99 | |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 100 | if (!list) |
| 101 | return 0; |
| 102 | list_for_each_entry(reg, list, pr_reg_abort_list) { |
| 103 | if (reg->pr_res_key == cmd->pr_res_key) |
Jörn Engel | c165f69 | 2011-11-24 02:04:42 +0100 | [diff] [blame] | 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | return 1; |
| 108 | } |
| 109 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 110 | void core_tmr_abort_task( |
| 111 | struct se_device *dev, |
| 112 | struct se_tmr_req *tmr, |
| 113 | struct se_session *se_sess) |
| 114 | { |
Joern Engel | f81ccb4 | 2014-09-16 16:23:13 -0400 | [diff] [blame] | 115 | struct se_cmd *se_cmd; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 116 | unsigned long flags; |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 117 | u64 ref_tag; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 118 | |
| 119 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
Joern Engel | f81ccb4 | 2014-09-16 16:23:13 -0400 | [diff] [blame] | 120 | list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) { |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 121 | |
| 122 | if (dev != se_cmd->se_dev) |
| 123 | continue; |
Alex Leung | 47b1584 | 2014-04-04 04:38:19 +0000 | [diff] [blame] | 124 | |
Bart Van Assche | dc0fafd | 2015-04-14 13:26:06 +0200 | [diff] [blame] | 125 | /* skip task management functions, including tmr->task_cmd */ |
| 126 | if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) |
Alex Leung | 47b1584 | 2014-04-04 04:38:19 +0000 | [diff] [blame] | 127 | continue; |
| 128 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 129 | ref_tag = se_cmd->tag; |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 130 | if (tmr->ref_task_tag != ref_tag) |
| 131 | continue; |
| 132 | |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 133 | printk("ABORT_TASK: Found referenced %s task_tag: %llu\n", |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 134 | se_cmd->se_tfo->get_fabric_name(), ref_tag); |
| 135 | |
Steve Hodgson | ab74b3d | 2012-10-31 10:24:02 -0700 | [diff] [blame] | 136 | spin_lock(&se_cmd->t_state_lock); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 137 | if (se_cmd->transport_state & CMD_T_COMPLETE) { |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 138 | printk("ABORT_TASK: ref_tag: %llu already complete," |
| 139 | " skipping\n", ref_tag); |
Steve Hodgson | ab74b3d | 2012-10-31 10:24:02 -0700 | [diff] [blame] | 140 | spin_unlock(&se_cmd->t_state_lock); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 141 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 142 | goto out; |
| 143 | } |
| 144 | se_cmd->transport_state |= CMD_T_ABORTED; |
Steve Hodgson | ab74b3d | 2012-10-31 10:24:02 -0700 | [diff] [blame] | 145 | spin_unlock(&se_cmd->t_state_lock); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 146 | |
| 147 | list_del_init(&se_cmd->se_cmd_list); |
| 148 | kref_get(&se_cmd->cmd_kref); |
| 149 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 150 | |
| 151 | cancel_work_sync(&se_cmd->work); |
| 152 | transport_wait_for_tasks(se_cmd); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 153 | |
Bart Van Assche | afc1660 | 2015-04-27 13:52:36 +0200 | [diff] [blame] | 154 | target_put_sess_cmd(se_cmd); |
Alex Leung | 68259b5 | 2014-03-21 22:20:41 -0700 | [diff] [blame] | 155 | transport_cmd_finish_abort(se_cmd, true); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 156 | |
| 157 | printk("ABORT_TASK: Sending TMR_FUNCTION_COMPLETE for" |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 158 | " ref_tag: %llu\n", ref_tag); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 159 | tmr->response = TMR_FUNCTION_COMPLETE; |
| 160 | return; |
| 161 | } |
| 162 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 163 | |
| 164 | out: |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 165 | printk("ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: %lld\n", |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 166 | tmr->ref_task_tag); |
| 167 | tmr->response = TMR_TASK_DOES_NOT_EXIST; |
| 168 | } |
| 169 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 170 | static void core_tmr_drain_tmr_list( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 171 | struct se_device *dev, |
| 172 | struct se_tmr_req *tmr, |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 173 | struct list_head *preempt_and_abort_list) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 174 | { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 175 | LIST_HEAD(drain_tmr_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 176 | struct se_tmr_req *tmr_p, *tmr_pp; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 177 | struct se_cmd *cmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 178 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 179 | /* |
| 180 | * Release all pending and outgoing TMRs aside from the received |
| 181 | * LUN_RESET tmr.. |
| 182 | */ |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 183 | spin_lock_irqsave(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 184 | list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { |
| 185 | /* |
| 186 | * Allow the received TMR to return with FUNCTION_COMPLETE. |
| 187 | */ |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 188 | if (tmr_p == tmr) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 189 | continue; |
| 190 | |
| 191 | cmd = tmr_p->task_cmd; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 192 | if (!cmd) { |
| 193 | pr_err("Unable to locate struct se_cmd for TMR\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 194 | continue; |
| 195 | } |
| 196 | /* |
| 197 | * If this function was called with a valid pr_res_key |
| 198 | * parameter (eg: for PROUT PREEMPT_AND_ABORT service action |
Bart Van Assche | ac75d8b | 2015-10-22 15:52:01 -0700 | [diff] [blame^] | 199 | * skip non registration key matching TMRs. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 200 | */ |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 201 | if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 202 | continue; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 203 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 204 | spin_lock(&cmd->t_state_lock); |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 205 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 206 | spin_unlock(&cmd->t_state_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 207 | continue; |
| 208 | } |
| 209 | if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 210 | spin_unlock(&cmd->t_state_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 211 | continue; |
| 212 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 213 | spin_unlock(&cmd->t_state_lock); |
| 214 | |
Joern Engel | 6eb40b2 | 2011-10-26 13:37:56 -0700 | [diff] [blame] | 215 | list_move_tail(&tmr_p->tmr_list, &drain_tmr_list); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 216 | } |
| 217 | spin_unlock_irqrestore(&dev->se_tmr_lock, flags); |
| 218 | |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 219 | 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] | 220 | list_del_init(&tmr_p->tmr_list); |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 221 | cmd = tmr_p->task_cmd; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 222 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 223 | pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 224 | " Response: 0x%02x, t_state: %d\n", |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 225 | (preempt_and_abort_list) ? "Preempt" : "", tmr_p, |
| 226 | tmr_p->function, tmr_p->response, cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 227 | |
Nicholas Bellinger | 8dc52b5 | 2011-10-09 02:02:51 -0700 | [diff] [blame] | 228 | transport_cmd_finish_abort(cmd, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 229 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 230 | } |
| 231 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 232 | static void core_tmr_drain_state_list( |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 233 | struct se_device *dev, |
| 234 | struct se_cmd *prout_cmd, |
| 235 | struct se_node_acl *tmr_nacl, |
| 236 | int tas, |
| 237 | struct list_head *preempt_and_abort_list) |
| 238 | { |
| 239 | LIST_HEAD(drain_task_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 240 | struct se_cmd *cmd, *next; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 241 | unsigned long flags; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 242 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 243 | /* |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 244 | * Complete outstanding commands with TASK_ABORTED SAM status. |
| 245 | * |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 246 | * This is following sam4r17, section 5.6 Aborting commands, Table 38 |
| 247 | * for TMR LUN_RESET: |
| 248 | * |
| 249 | * a) "Yes" indicates that each command that is aborted on an I_T nexus |
| 250 | * other than the one that caused the SCSI device condition is |
| 251 | * completed with TASK ABORTED status, if the TAS bit is set to one in |
| 252 | * the Control mode page (see SPC-4). "No" indicates that no status is |
| 253 | * returned for aborted commands. |
| 254 | * |
| 255 | * d) If the logical unit reset is caused by a particular I_T nexus |
| 256 | * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" |
| 257 | * (TASK_ABORTED status) applies. |
| 258 | * |
| 259 | * Otherwise (e.g., if triggered by a hard reset), "no" |
| 260 | * (no TASK_ABORTED SAM status) applies. |
| 261 | * |
| 262 | * Note that this seems to be independent of TAS (Task Aborted Status) |
| 263 | * in the Control Mode Page. |
| 264 | */ |
| 265 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 266 | list_for_each_entry_safe(cmd, next, &dev->state_list, state_list) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 267 | /* |
| 268 | * For PREEMPT_AND_ABORT usage, only process commands |
| 269 | * with a matching reservation key. |
| 270 | */ |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 271 | if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 272 | continue; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 273 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 274 | /* |
| 275 | * Not aborting PROUT PREEMPT_AND_ABORT CDB.. |
| 276 | */ |
| 277 | if (prout_cmd == cmd) |
| 278 | continue; |
| 279 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 280 | list_move_tail(&cmd->state_list, &drain_task_list); |
| 281 | cmd->state_active = false; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 282 | } |
| 283 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
| 284 | |
| 285 | while (!list_empty(&drain_task_list)) { |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 286 | cmd = list_entry(drain_task_list.next, struct se_cmd, state_list); |
| 287 | list_del(&cmd->state_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 288 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 289 | pr_debug("LUN_RESET: %s cmd: %p" |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 290 | " ITT/CmdSN: 0x%08llx/0x%08x, i_state: %d, t_state: %d" |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 291 | "cdb: 0x%02x\n", |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 292 | (preempt_and_abort_list) ? "Preempt" : "", cmd, |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 293 | cmd->tag, 0, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 294 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 295 | cmd->t_task_cdb[0]); |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 296 | pr_debug("LUN_RESET: ITT[0x%08llx] - pr_res_key: 0x%016Lx" |
Christoph Hellwig | 785fdf7 | 2012-04-24 00:25:04 -0400 | [diff] [blame] | 297 | " -- CMD_T_ACTIVE: %d" |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 298 | " CMD_T_STOP: %d CMD_T_SENT: %d\n", |
Bart Van Assche | 649ee05 | 2015-04-14 13:26:44 +0200 | [diff] [blame] | 299 | cmd->tag, cmd->pr_res_key, |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 300 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
| 301 | (cmd->transport_state & CMD_T_STOP) != 0, |
| 302 | (cmd->transport_state & CMD_T_SENT) != 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 303 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 304 | /* |
| 305 | * If the command may be queued onto a workqueue cancel it now. |
| 306 | * |
| 307 | * This is equivalent to removal from the execute queue in the |
| 308 | * loop above, but we do it down here given that |
| 309 | * cancel_work_sync may block. |
| 310 | */ |
| 311 | if (cmd->t_state == TRANSPORT_COMPLETE) |
| 312 | cancel_work_sync(&cmd->work); |
| 313 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 314 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 315 | target_stop_cmd(cmd, &flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 316 | |
Christoph Hellwig | 7d680f3 | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 317 | cmd->transport_state |= CMD_T_ABORTED; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 318 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 319 | |
Nicholas Bellinger | c1c35d5 | 2013-06-06 02:00:06 -0700 | [diff] [blame] | 320 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 321 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 322 | } |
| 323 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 324 | int core_tmr_lun_reset( |
| 325 | struct se_device *dev, |
| 326 | struct se_tmr_req *tmr, |
| 327 | struct list_head *preempt_and_abort_list, |
| 328 | struct se_cmd *prout_cmd) |
| 329 | { |
| 330 | struct se_node_acl *tmr_nacl = NULL; |
| 331 | struct se_portal_group *tmr_tpg = NULL; |
| 332 | int tas; |
| 333 | /* |
| 334 | * TASK_ABORTED status bit, this is configurable via ConfigFS |
| 335 | * struct se_device attributes. spc4r17 section 7.4.6 Control mode page |
| 336 | * |
| 337 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 338 | * tasks shall be terminated by the device server without any response |
| 339 | * to the application client. A TAS bit set to one specifies that tasks |
| 340 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 341 | * which the command was received shall be completed with TASK ABORTED |
| 342 | * status (see SAM-4). |
| 343 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 344 | tas = dev->dev_attrib.emulate_tas; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 345 | /* |
| 346 | * Determine if this se_tmr is coming from a $FABRIC_MOD |
| 347 | * or struct se_device passthrough.. |
| 348 | */ |
| 349 | if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { |
| 350 | tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; |
| 351 | tmr_tpg = tmr->task_cmd->se_sess->se_tpg; |
| 352 | if (tmr_nacl && tmr_tpg) { |
| 353 | pr_debug("LUN_RESET: TMR caller fabric: %s" |
| 354 | " initiator port %s\n", |
| 355 | tmr_tpg->se_tpg_tfo->get_fabric_name(), |
| 356 | tmr_nacl->initiatorname); |
| 357 | } |
| 358 | } |
| 359 | pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n", |
| 360 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
| 361 | dev->transport->name, tas); |
| 362 | |
| 363 | core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 364 | core_tmr_drain_state_list(dev, prout_cmd, tmr_nacl, tas, |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 365 | preempt_and_abort_list); |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 366 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 367 | /* |
| 368 | * Clear any legacy SPC-2 reservation when called during |
| 369 | * LOGICAL UNIT RESET |
| 370 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 371 | if (!preempt_and_abort_list && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 372 | (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 373 | spin_lock(&dev->dev_reservation_lock); |
| 374 | dev->dev_reserved_node_acl = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 375 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 376 | spin_unlock(&dev->dev_reservation_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 377 | pr_debug("LUN_RESET: SCSI-2 Released reservation\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 378 | } |
| 379 | |
Nicholas Bellinger | ee48068 | 2013-11-13 18:34:55 -0800 | [diff] [blame] | 380 | atomic_long_inc(&dev->num_resets); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 381 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 382 | pr_debug("LUN_RESET: %s for [%s] Complete\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 383 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 384 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 385 | return 0; |
| 386 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 387 | |