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 | fd9a11d | 2012-11-09 14:51:48 -0800 | [diff] [blame] | 6 | * (c) Copyright 2009-2012 RisingTide Systems LLC. |
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 | #include <scsi/scsi.h> |
| 31 | #include <scsi/scsi_cmnd.h> |
| 32 | |
| 33 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 34 | #include <target/target_core_backend.h> |
| 35 | #include <target/target_core_fabric.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 36 | #include <target/target_core_configfs.h> |
| 37 | |
Christoph Hellwig | e26d99a | 2011-11-14 12:30:30 -0500 | [diff] [blame] | 38 | #include "target_core_internal.h" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 39 | #include "target_core_alua.h" |
| 40 | #include "target_core_pr.h" |
| 41 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 42 | int core_tmr_alloc_req( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 43 | struct se_cmd *se_cmd, |
| 44 | void *fabric_tmr_ptr, |
Roland Dreier | dd503a5 | 2011-10-06 09:56:16 -0700 | [diff] [blame] | 45 | u8 function, |
| 46 | gfp_t gfp_flags) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 47 | { |
| 48 | struct se_tmr_req *tmr; |
| 49 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 50 | tmr = kzalloc(sizeof(struct se_tmr_req), gfp_flags); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 51 | if (!tmr) { |
| 52 | pr_err("Unable to allocate struct se_tmr_req\n"); |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 53 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 54 | } |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 55 | |
| 56 | se_cmd->se_cmd_flags |= SCF_SCSI_TMR_CDB; |
| 57 | se_cmd->se_tmr_req = tmr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 58 | tmr->task_cmd = se_cmd; |
| 59 | tmr->fabric_tmr_ptr = fabric_tmr_ptr; |
| 60 | tmr->function = function; |
| 61 | INIT_LIST_HEAD(&tmr->tmr_list); |
| 62 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 63 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 64 | } |
| 65 | EXPORT_SYMBOL(core_tmr_alloc_req); |
| 66 | |
| 67 | void core_tmr_release_req( |
| 68 | struct se_tmr_req *tmr) |
| 69 | { |
| 70 | struct se_device *dev = tmr->tmr_dev; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 71 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 72 | |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 73 | if (!dev) { |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 74 | kfree(tmr); |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 75 | return; |
| 76 | } |
| 77 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 78 | spin_lock_irqsave(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 79 | list_del(&tmr->tmr_list); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 80 | spin_unlock_irqrestore(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | 7fd29aa | 2011-06-23 23:48:32 +0000 | [diff] [blame] | 81 | |
Andy Grover | c8e31f2 | 2012-01-19 13:39:17 -0800 | [diff] [blame] | 82 | kfree(tmr); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | static void core_tmr_handle_tas_abort( |
| 86 | struct se_node_acl *tmr_nacl, |
| 87 | struct se_cmd *cmd, |
| 88 | int tas, |
| 89 | int fe_count) |
| 90 | { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 91 | if (!fe_count) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 92 | transport_cmd_finish_abort(cmd, 1); |
| 93 | return; |
| 94 | } |
| 95 | /* |
| 96 | * TASK ABORTED status (TAS) bit support |
| 97 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 98 | if ((tmr_nacl && |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 99 | (tmr_nacl == cmd->se_sess->se_node_acl)) || tas) |
| 100 | transport_send_task_abort(cmd); |
| 101 | |
| 102 | transport_cmd_finish_abort(cmd, 0); |
| 103 | } |
| 104 | |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 105 | static int target_check_cdb_and_preempt(struct list_head *list, |
| 106 | struct se_cmd *cmd) |
Jörn Engel | c165f69 | 2011-11-24 02:04:42 +0100 | [diff] [blame] | 107 | { |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 108 | struct t10_pr_registration *reg; |
Jörn Engel | c165f69 | 2011-11-24 02:04:42 +0100 | [diff] [blame] | 109 | |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 110 | if (!list) |
| 111 | return 0; |
| 112 | list_for_each_entry(reg, list, pr_reg_abort_list) { |
| 113 | if (reg->pr_res_key == cmd->pr_res_key) |
Jörn Engel | c165f69 | 2011-11-24 02:04:42 +0100 | [diff] [blame] | 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | return 1; |
| 118 | } |
| 119 | |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 120 | void core_tmr_abort_task( |
| 121 | struct se_device *dev, |
| 122 | struct se_tmr_req *tmr, |
| 123 | struct se_session *se_sess) |
| 124 | { |
| 125 | struct se_cmd *se_cmd, *tmp_cmd; |
| 126 | unsigned long flags; |
| 127 | int ref_tag; |
| 128 | |
| 129 | spin_lock_irqsave(&se_sess->sess_cmd_lock, flags); |
| 130 | list_for_each_entry_safe(se_cmd, tmp_cmd, |
| 131 | &se_sess->sess_cmd_list, se_cmd_list) { |
| 132 | |
| 133 | if (dev != se_cmd->se_dev) |
| 134 | continue; |
| 135 | ref_tag = se_cmd->se_tfo->get_task_tag(se_cmd); |
| 136 | if (tmr->ref_task_tag != ref_tag) |
| 137 | continue; |
| 138 | |
| 139 | printk("ABORT_TASK: Found referenced %s task_tag: %u\n", |
| 140 | se_cmd->se_tfo->get_fabric_name(), ref_tag); |
| 141 | |
Steve Hodgson | ab74b3d | 2012-10-31 10:24:02 -0700 | [diff] [blame] | 142 | spin_lock(&se_cmd->t_state_lock); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 143 | if (se_cmd->transport_state & CMD_T_COMPLETE) { |
| 144 | printk("ABORT_TASK: ref_tag: %u already complete, skipping\n", ref_tag); |
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 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 147 | goto out; |
| 148 | } |
| 149 | se_cmd->transport_state |= CMD_T_ABORTED; |
Steve Hodgson | ab74b3d | 2012-10-31 10:24:02 -0700 | [diff] [blame] | 150 | spin_unlock(&se_cmd->t_state_lock); |
Nicholas Bellinger | 3d28934 | 2012-02-13 02:38:14 -0800 | [diff] [blame] | 151 | |
| 152 | list_del_init(&se_cmd->se_cmd_list); |
| 153 | kref_get(&se_cmd->cmd_kref); |
| 154 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 155 | |
| 156 | cancel_work_sync(&se_cmd->work); |
| 157 | transport_wait_for_tasks(se_cmd); |
| 158 | /* |
| 159 | * Now send SAM_STAT_TASK_ABORTED status for the referenced |
| 160 | * se_cmd descriptor.. |
| 161 | */ |
| 162 | transport_send_task_abort(se_cmd); |
| 163 | /* |
| 164 | * Also deal with possible extra acknowledge reference.. |
| 165 | */ |
| 166 | if (se_cmd->se_cmd_flags & SCF_ACK_KREF) |
| 167 | target_put_sess_cmd(se_sess, se_cmd); |
| 168 | |
| 169 | target_put_sess_cmd(se_sess, se_cmd); |
| 170 | |
| 171 | printk("ABORT_TASK: Sending TMR_FUNCTION_COMPLETE for" |
| 172 | " ref_tag: %d\n", ref_tag); |
| 173 | tmr->response = TMR_FUNCTION_COMPLETE; |
| 174 | return; |
| 175 | } |
| 176 | spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags); |
| 177 | |
| 178 | out: |
| 179 | printk("ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: %d\n", |
| 180 | tmr->ref_task_tag); |
| 181 | tmr->response = TMR_TASK_DOES_NOT_EXIST; |
| 182 | } |
| 183 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 184 | static void core_tmr_drain_tmr_list( |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 185 | struct se_device *dev, |
| 186 | struct se_tmr_req *tmr, |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 187 | struct list_head *preempt_and_abort_list) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 188 | { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 189 | LIST_HEAD(drain_tmr_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 190 | struct se_tmr_req *tmr_p, *tmr_pp; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 191 | struct se_cmd *cmd; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 192 | unsigned long flags; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 193 | /* |
| 194 | * Release all pending and outgoing TMRs aside from the received |
| 195 | * LUN_RESET tmr.. |
| 196 | */ |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 197 | spin_lock_irqsave(&dev->se_tmr_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 198 | list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) { |
| 199 | /* |
| 200 | * Allow the received TMR to return with FUNCTION_COMPLETE. |
| 201 | */ |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 202 | if (tmr_p == tmr) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 203 | continue; |
| 204 | |
| 205 | cmd = tmr_p->task_cmd; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 206 | if (!cmd) { |
| 207 | pr_err("Unable to locate struct se_cmd for TMR\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 208 | continue; |
| 209 | } |
| 210 | /* |
| 211 | * If this function was called with a valid pr_res_key |
| 212 | * parameter (eg: for PROUT PREEMPT_AND_ABORT service action |
| 213 | * skip non regisration key matching TMRs. |
| 214 | */ |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 215 | if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 216 | continue; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 217 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 218 | spin_lock(&cmd->t_state_lock); |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 219 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 220 | spin_unlock(&cmd->t_state_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 221 | continue; |
| 222 | } |
| 223 | if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) { |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 224 | spin_unlock(&cmd->t_state_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 225 | continue; |
| 226 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 227 | spin_unlock(&cmd->t_state_lock); |
| 228 | |
Joern Engel | 6eb40b2 | 2011-10-26 13:37:56 -0700 | [diff] [blame] | 229 | list_move_tail(&tmr_p->tmr_list, &drain_tmr_list); |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 230 | } |
| 231 | spin_unlock_irqrestore(&dev->se_tmr_lock, flags); |
| 232 | |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 233 | 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] | 234 | list_del_init(&tmr_p->tmr_list); |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 235 | cmd = tmr_p->task_cmd; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 236 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 237 | pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 238 | " Response: 0x%02x, t_state: %d\n", |
Joern Engel | abc1fd4 | 2011-10-26 14:22:19 -0700 | [diff] [blame] | 239 | (preempt_and_abort_list) ? "Preempt" : "", tmr_p, |
| 240 | tmr_p->function, tmr_p->response, cmd->t_state); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 241 | |
Nicholas Bellinger | 8dc52b5 | 2011-10-09 02:02:51 -0700 | [diff] [blame] | 242 | transport_cmd_finish_abort(cmd, 1); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 243 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 244 | } |
| 245 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 246 | static void core_tmr_drain_state_list( |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 247 | struct se_device *dev, |
| 248 | struct se_cmd *prout_cmd, |
| 249 | struct se_node_acl *tmr_nacl, |
| 250 | int tas, |
| 251 | struct list_head *preempt_and_abort_list) |
| 252 | { |
| 253 | LIST_HEAD(drain_task_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 254 | struct se_cmd *cmd, *next; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 255 | unsigned long flags; |
| 256 | int fe_count; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 257 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 258 | /* |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 259 | * Complete outstanding commands with TASK_ABORTED SAM status. |
| 260 | * |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 261 | * This is following sam4r17, section 5.6 Aborting commands, Table 38 |
| 262 | * for TMR LUN_RESET: |
| 263 | * |
| 264 | * a) "Yes" indicates that each command that is aborted on an I_T nexus |
| 265 | * other than the one that caused the SCSI device condition is |
| 266 | * completed with TASK ABORTED status, if the TAS bit is set to one in |
| 267 | * the Control mode page (see SPC-4). "No" indicates that no status is |
| 268 | * returned for aborted commands. |
| 269 | * |
| 270 | * d) If the logical unit reset is caused by a particular I_T nexus |
| 271 | * (e.g., by a LOGICAL UNIT RESET task management function), then "yes" |
| 272 | * (TASK_ABORTED status) applies. |
| 273 | * |
| 274 | * Otherwise (e.g., if triggered by a hard reset), "no" |
| 275 | * (no TASK_ABORTED SAM status) applies. |
| 276 | * |
| 277 | * Note that this seems to be independent of TAS (Task Aborted Status) |
| 278 | * in the Control Mode Page. |
| 279 | */ |
| 280 | spin_lock_irqsave(&dev->execute_task_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 281 | list_for_each_entry_safe(cmd, next, &dev->state_list, state_list) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 282 | /* |
| 283 | * For PREEMPT_AND_ABORT usage, only process commands |
| 284 | * with a matching reservation key. |
| 285 | */ |
Jörn Engel | feae856 | 2011-11-24 02:05:12 +0100 | [diff] [blame] | 286 | if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd)) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 287 | continue; |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 288 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 289 | /* |
| 290 | * Not aborting PROUT PREEMPT_AND_ABORT CDB.. |
| 291 | */ |
| 292 | if (prout_cmd == cmd) |
| 293 | continue; |
| 294 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 295 | list_move_tail(&cmd->state_list, &drain_task_list); |
| 296 | cmd->state_active = false; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 297 | } |
| 298 | spin_unlock_irqrestore(&dev->execute_task_lock, flags); |
| 299 | |
| 300 | while (!list_empty(&drain_task_list)) { |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 301 | cmd = list_entry(drain_task_list.next, struct se_cmd, state_list); |
| 302 | list_del(&cmd->state_list); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 303 | |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 304 | pr_debug("LUN_RESET: %s cmd: %p" |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 305 | " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state: %d" |
| 306 | "cdb: 0x%02x\n", |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 307 | (preempt_and_abort_list) ? "Preempt" : "", cmd, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 308 | cmd->se_tfo->get_task_tag(cmd), 0, |
| 309 | cmd->se_tfo->get_cmd_state(cmd), cmd->t_state, |
Christoph Hellwig | f2da9db | 2011-10-17 13:56:51 -0400 | [diff] [blame] | 310 | cmd->t_task_cdb[0]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 311 | pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx" |
Christoph Hellwig | 785fdf7 | 2012-04-24 00:25:04 -0400 | [diff] [blame] | 312 | " -- CMD_T_ACTIVE: %d" |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 313 | " CMD_T_STOP: %d CMD_T_SENT: %d\n", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 314 | cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key, |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 315 | (cmd->transport_state & CMD_T_ACTIVE) != 0, |
| 316 | (cmd->transport_state & CMD_T_STOP) != 0, |
| 317 | (cmd->transport_state & CMD_T_SENT) != 0); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 318 | |
Christoph Hellwig | 35e0e75 | 2011-10-17 13:56:53 -0400 | [diff] [blame] | 319 | /* |
| 320 | * If the command may be queued onto a workqueue cancel it now. |
| 321 | * |
| 322 | * This is equivalent to removal from the execute queue in the |
| 323 | * loop above, but we do it down here given that |
| 324 | * cancel_work_sync may block. |
| 325 | */ |
| 326 | if (cmd->t_state == TRANSPORT_COMPLETE) |
| 327 | cancel_work_sync(&cmd->work); |
| 328 | |
Christoph Hellwig | cdbb70b | 2011-10-17 13:56:46 -0400 | [diff] [blame] | 329 | spin_lock_irqsave(&cmd->t_state_lock, flags); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 330 | target_stop_cmd(cmd, &flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 331 | |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 332 | fe_count = atomic_read(&cmd->t_fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 333 | |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 334 | if (!(cmd->transport_state & CMD_T_ACTIVE)) { |
| 335 | pr_debug("LUN_RESET: got CMD_T_ACTIVE for" |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 336 | " cdb: %p, t_fe_count: %d dev: %p\n", cmd, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 337 | fe_count, dev); |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 338 | cmd->transport_state |= CMD_T_ABORTED; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 339 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 340 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 341 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 342 | continue; |
| 343 | } |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 344 | pr_debug("LUN_RESET: Got !CMD_T_ACTIVE for cdb: %p," |
| 345 | " t_fe_count: %d dev: %p\n", cmd, fe_count, dev); |
Christoph Hellwig | 7d680f3b | 2011-12-21 14:13:47 -0500 | [diff] [blame] | 346 | cmd->transport_state |= CMD_T_ABORTED; |
Andy Grover | a1d8b49 | 2011-05-02 17:12:10 -0700 | [diff] [blame] | 347 | spin_unlock_irqrestore(&cmd->t_state_lock, flags); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 348 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 349 | core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 350 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 351 | } |
| 352 | |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 353 | int core_tmr_lun_reset( |
| 354 | struct se_device *dev, |
| 355 | struct se_tmr_req *tmr, |
| 356 | struct list_head *preempt_and_abort_list, |
| 357 | struct se_cmd *prout_cmd) |
| 358 | { |
| 359 | struct se_node_acl *tmr_nacl = NULL; |
| 360 | struct se_portal_group *tmr_tpg = NULL; |
| 361 | int tas; |
| 362 | /* |
| 363 | * TASK_ABORTED status bit, this is configurable via ConfigFS |
| 364 | * struct se_device attributes. spc4r17 section 7.4.6 Control mode page |
| 365 | * |
| 366 | * A task aborted status (TAS) bit set to zero specifies that aborted |
| 367 | * tasks shall be terminated by the device server without any response |
| 368 | * to the application client. A TAS bit set to one specifies that tasks |
| 369 | * aborted by the actions of an I_T nexus other than the I_T nexus on |
| 370 | * which the command was received shall be completed with TASK ABORTED |
| 371 | * status (see SAM-4). |
| 372 | */ |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 373 | tas = dev->dev_attrib.emulate_tas; |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 374 | /* |
| 375 | * Determine if this se_tmr is coming from a $FABRIC_MOD |
| 376 | * or struct se_device passthrough.. |
| 377 | */ |
| 378 | if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) { |
| 379 | tmr_nacl = tmr->task_cmd->se_sess->se_node_acl; |
| 380 | tmr_tpg = tmr->task_cmd->se_sess->se_tpg; |
| 381 | if (tmr_nacl && tmr_tpg) { |
| 382 | pr_debug("LUN_RESET: TMR caller fabric: %s" |
| 383 | " initiator port %s\n", |
| 384 | tmr_tpg->se_tpg_tfo->get_fabric_name(), |
| 385 | tmr_nacl->initiatorname); |
| 386 | } |
| 387 | } |
| 388 | pr_debug("LUN_RESET: %s starting for [%s], tas: %d\n", |
| 389 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
| 390 | dev->transport->name, tas); |
| 391 | |
| 392 | core_tmr_drain_tmr_list(dev, tmr, preempt_and_abort_list); |
Christoph Hellwig | cf572a9 | 2012-04-24 00:25:05 -0400 | [diff] [blame] | 393 | core_tmr_drain_state_list(dev, prout_cmd, tmr_nacl, tas, |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 394 | preempt_and_abort_list); |
Christoph Hellwig | af87729 | 2012-07-08 15:58:49 -0400 | [diff] [blame] | 395 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 396 | /* |
| 397 | * Clear any legacy SPC-2 reservation when called during |
| 398 | * LOGICAL UNIT RESET |
| 399 | */ |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 400 | if (!preempt_and_abort_list && |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 401 | (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 402 | spin_lock(&dev->dev_reservation_lock); |
| 403 | dev->dev_reserved_node_acl = NULL; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 404 | dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 405 | spin_unlock(&dev->dev_reservation_lock); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 406 | pr_debug("LUN_RESET: SCSI-2 Released reservation\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 407 | } |
| 408 | |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 409 | spin_lock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 410 | dev->num_resets++; |
Nicholas Bellinger | 1e7de68 | 2011-05-19 20:19:10 -0700 | [diff] [blame] | 411 | spin_unlock_irq(&dev->stats_lock); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 412 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 413 | pr_debug("LUN_RESET: %s for [%s] Complete\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 414 | (preempt_and_abort_list) ? "Preempt" : "TMR", |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 415 | dev->transport->name); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 416 | return 0; |
| 417 | } |
Nicholas Bellinger | d050ffb | 2011-09-28 21:37:29 -0700 | [diff] [blame] | 418 | |