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Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -08001/*******************************************************************************
2 * Filename: target_core_tmr.c
3 *
4 * This file contains SPC-3 task management infrastructure
5 *
Nicholas Bellingerfd9a11d2012-11-09 14:51:48 -08006 * (c) Copyright 2009-2012 RisingTide Systems LLC.
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -08007 *
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 Bellingerc66ac9d2010-12-17 11:11:26 -080026#include <linux/slab.h>
27#include <linux/spinlock.h>
28#include <linux/list.h>
Paul Gortmakerc53181a2011-08-30 18:16:43 -040029#include <linux/export.h>
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080030#include <scsi/scsi.h>
31#include <scsi/scsi_cmnd.h>
32
33#include <target/target_core_base.h>
Christoph Hellwigc4795fb2011-11-16 09:46:48 -050034#include <target/target_core_backend.h>
35#include <target/target_core_fabric.h>
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080036#include <target/target_core_configfs.h>
37
Christoph Hellwige26d99a2011-11-14 12:30:30 -050038#include "target_core_internal.h"
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080039#include "target_core_alua.h"
40#include "target_core_pr.h"
41
Andy Groverc8e31f22012-01-19 13:39:17 -080042int core_tmr_alloc_req(
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080043 struct se_cmd *se_cmd,
44 void *fabric_tmr_ptr,
Roland Dreierdd503a52011-10-06 09:56:16 -070045 u8 function,
46 gfp_t gfp_flags)
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080047{
48 struct se_tmr_req *tmr;
49
Andy Groverc8e31f22012-01-19 13:39:17 -080050 tmr = kzalloc(sizeof(struct se_tmr_req), gfp_flags);
Andy Grover6708bb22011-06-08 10:36:43 -070051 if (!tmr) {
52 pr_err("Unable to allocate struct se_tmr_req\n");
Andy Groverc8e31f22012-01-19 13:39:17 -080053 return -ENOMEM;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080054 }
Andy Groverc8e31f22012-01-19 13:39:17 -080055
56 se_cmd->se_cmd_flags |= SCF_SCSI_TMR_CDB;
57 se_cmd->se_tmr_req = tmr;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080058 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 Groverc8e31f22012-01-19 13:39:17 -080063 return 0;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080064}
65EXPORT_SYMBOL(core_tmr_alloc_req);
66
67void core_tmr_release_req(
68 struct se_tmr_req *tmr)
69{
70 struct se_device *dev = tmr->tmr_dev;
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -070071 unsigned long flags;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080072
Nicholas Bellinger7fd29aa2011-06-23 23:48:32 +000073 if (!dev) {
Andy Groverc8e31f22012-01-19 13:39:17 -080074 kfree(tmr);
Nicholas Bellinger7fd29aa2011-06-23 23:48:32 +000075 return;
76 }
77
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -070078 spin_lock_irqsave(&dev->se_tmr_lock, flags);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080079 list_del(&tmr->tmr_list);
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -070080 spin_unlock_irqrestore(&dev->se_tmr_lock, flags);
Nicholas Bellinger7fd29aa2011-06-23 23:48:32 +000081
Andy Groverc8e31f22012-01-19 13:39:17 -080082 kfree(tmr);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080083}
84
85static 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 Grover6708bb22011-06-08 10:36:43 -070091 if (!fe_count) {
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080092 transport_cmd_finish_abort(cmd, 1);
93 return;
94 }
95 /*
96 * TASK ABORTED status (TAS) bit support
97 */
Andy Grover6708bb22011-06-08 10:36:43 -070098 if ((tmr_nacl &&
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -080099 (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 Engelfeae8562011-11-24 02:05:12 +0100105static int target_check_cdb_and_preempt(struct list_head *list,
106 struct se_cmd *cmd)
Jörn Engelc165f692011-11-24 02:04:42 +0100107{
Jörn Engelfeae8562011-11-24 02:05:12 +0100108 struct t10_pr_registration *reg;
Jörn Engelc165f692011-11-24 02:04:42 +0100109
Jörn Engelfeae8562011-11-24 02:05:12 +0100110 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 Engelc165f692011-11-24 02:04:42 +0100114 return 0;
115 }
116
117 return 1;
118}
119
Nicholas Bellinger3d289342012-02-13 02:38:14 -0800120void 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 Hodgsonab74b3d2012-10-31 10:24:02 -0700142 spin_lock(&se_cmd->t_state_lock);
Nicholas Bellinger3d289342012-02-13 02:38:14 -0800143 if (se_cmd->transport_state & CMD_T_COMPLETE) {
144 printk("ABORT_TASK: ref_tag: %u already complete, skipping\n", ref_tag);
Steve Hodgsonab74b3d2012-10-31 10:24:02 -0700145 spin_unlock(&se_cmd->t_state_lock);
Nicholas Bellinger3d289342012-02-13 02:38:14 -0800146 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
147 goto out;
148 }
149 se_cmd->transport_state |= CMD_T_ABORTED;
Steve Hodgsonab74b3d2012-10-31 10:24:02 -0700150 spin_unlock(&se_cmd->t_state_lock);
Nicholas Bellinger3d289342012-02-13 02:38:14 -0800151
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
178out:
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 Bellingerd050ffb2011-09-28 21:37:29 -0700184static void core_tmr_drain_tmr_list(
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800185 struct se_device *dev,
186 struct se_tmr_req *tmr,
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700187 struct list_head *preempt_and_abort_list)
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800188{
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700189 LIST_HEAD(drain_tmr_list);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800190 struct se_tmr_req *tmr_p, *tmr_pp;
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700191 struct se_cmd *cmd;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800192 unsigned long flags;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800193 /*
194 * Release all pending and outgoing TMRs aside from the received
195 * LUN_RESET tmr..
196 */
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700197 spin_lock_irqsave(&dev->se_tmr_lock, flags);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800198 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 Engelabc1fd42011-10-26 14:22:19 -0700202 if (tmr_p == tmr)
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800203 continue;
204
205 cmd = tmr_p->task_cmd;
Andy Grover6708bb22011-06-08 10:36:43 -0700206 if (!cmd) {
207 pr_err("Unable to locate struct se_cmd for TMR\n");
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800208 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 Engelfeae8562011-11-24 02:05:12 +0100215 if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd))
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800216 continue;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800217
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700218 spin_lock(&cmd->t_state_lock);
Christoph Hellwig7d680f3b2011-12-21 14:13:47 -0500219 if (!(cmd->transport_state & CMD_T_ACTIVE)) {
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700220 spin_unlock(&cmd->t_state_lock);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800221 continue;
222 }
223 if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) {
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700224 spin_unlock(&cmd->t_state_lock);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800225 continue;
226 }
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700227 spin_unlock(&cmd->t_state_lock);
228
Joern Engel6eb40b22011-10-26 13:37:56 -0700229 list_move_tail(&tmr_p->tmr_list, &drain_tmr_list);
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700230 }
231 spin_unlock_irqrestore(&dev->se_tmr_lock, flags);
232
Joern Engelabc1fd42011-10-26 14:22:19 -0700233 list_for_each_entry_safe(tmr_p, tmr_pp, &drain_tmr_list, tmr_list) {
Joern Engelb8a11d72011-10-27 15:44:46 -0700234 list_del_init(&tmr_p->tmr_list);
Joern Engelabc1fd42011-10-26 14:22:19 -0700235 cmd = tmr_p->task_cmd;
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700236
Andy Grover6708bb22011-06-08 10:36:43 -0700237 pr_debug("LUN_RESET: %s releasing TMR %p Function: 0x%02x,"
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800238 " Response: 0x%02x, t_state: %d\n",
Joern Engelabc1fd42011-10-26 14:22:19 -0700239 (preempt_and_abort_list) ? "Preempt" : "", tmr_p,
240 tmr_p->function, tmr_p->response, cmd->t_state);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800241
Nicholas Bellinger8dc52b52011-10-09 02:02:51 -0700242 transport_cmd_finish_abort(cmd, 1);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800243 }
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700244}
245
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400246static void core_tmr_drain_state_list(
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700247 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 Hellwigcf572a92012-04-24 00:25:05 -0400254 struct se_cmd *cmd, *next;
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700255 unsigned long flags;
256 int fe_count;
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400257
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800258 /*
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400259 * Complete outstanding commands with TASK_ABORTED SAM status.
260 *
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800261 * 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 Hellwigcf572a92012-04-24 00:25:05 -0400281 list_for_each_entry_safe(cmd, next, &dev->state_list, state_list) {
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800282 /*
283 * For PREEMPT_AND_ABORT usage, only process commands
284 * with a matching reservation key.
285 */
Jörn Engelfeae8562011-11-24 02:05:12 +0100286 if (target_check_cdb_and_preempt(preempt_and_abort_list, cmd))
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800287 continue;
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400288
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800289 /*
290 * Not aborting PROUT PREEMPT_AND_ABORT CDB..
291 */
292 if (prout_cmd == cmd)
293 continue;
294
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400295 list_move_tail(&cmd->state_list, &drain_task_list);
296 cmd->state_active = false;
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700297 }
298 spin_unlock_irqrestore(&dev->execute_task_lock, flags);
299
300 while (!list_empty(&drain_task_list)) {
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400301 cmd = list_entry(drain_task_list.next, struct se_cmd, state_list);
302 list_del(&cmd->state_list);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800303
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400304 pr_debug("LUN_RESET: %s cmd: %p"
Christoph Hellwigf2da9db2011-10-17 13:56:51 -0400305 " ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state: %d"
306 "cdb: 0x%02x\n",
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400307 (preempt_and_abort_list) ? "Preempt" : "", cmd,
Andy Grovere3d6f902011-07-19 08:55:10 +0000308 cmd->se_tfo->get_task_tag(cmd), 0,
309 cmd->se_tfo->get_cmd_state(cmd), cmd->t_state,
Christoph Hellwigf2da9db2011-10-17 13:56:51 -0400310 cmd->t_task_cdb[0]);
Andy Grover6708bb22011-06-08 10:36:43 -0700311 pr_debug("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
Christoph Hellwig785fdf72012-04-24 00:25:04 -0400312 " -- CMD_T_ACTIVE: %d"
Christoph Hellwig7d680f3b2011-12-21 14:13:47 -0500313 " CMD_T_STOP: %d CMD_T_SENT: %d\n",
Andy Grovere3d6f902011-07-19 08:55:10 +0000314 cmd->se_tfo->get_task_tag(cmd), cmd->pr_res_key,
Christoph Hellwig7d680f3b2011-12-21 14:13:47 -0500315 (cmd->transport_state & CMD_T_ACTIVE) != 0,
316 (cmd->transport_state & CMD_T_STOP) != 0,
317 (cmd->transport_state & CMD_T_SENT) != 0);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800318
Christoph Hellwig35e0e752011-10-17 13:56:53 -0400319 /*
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 Hellwigcdbb70b2011-10-17 13:56:46 -0400329 spin_lock_irqsave(&cmd->t_state_lock, flags);
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400330 target_stop_cmd(cmd, &flags);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800331
Andy Grovera1d8b492011-05-02 17:12:10 -0700332 fe_count = atomic_read(&cmd->t_fe_count);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800333
Christoph Hellwig7d680f3b2011-12-21 14:13:47 -0500334 if (!(cmd->transport_state & CMD_T_ACTIVE)) {
335 pr_debug("LUN_RESET: got CMD_T_ACTIVE for"
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400336 " cdb: %p, t_fe_count: %d dev: %p\n", cmd,
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800337 fe_count, dev);
Christoph Hellwig7d680f3b2011-12-21 14:13:47 -0500338 cmd->transport_state |= CMD_T_ABORTED;
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700339 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800340
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700341 core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800342 continue;
343 }
Christoph Hellwigcf572a92012-04-24 00:25:05 -0400344 pr_debug("LUN_RESET: Got !CMD_T_ACTIVE for cdb: %p,"
345 " t_fe_count: %d dev: %p\n", cmd, fe_count, dev);
Christoph Hellwig7d680f3b2011-12-21 14:13:47 -0500346 cmd->transport_state |= CMD_T_ABORTED;
Andy Grovera1d8b492011-05-02 17:12:10 -0700347 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800348
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700349 core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800350 }
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700351}
352
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700353int 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 Hellwig0fd97cc2012-10-08 00:03:19 -0400373 tas = dev->dev_attrib.emulate_tas;
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700374 /*
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 Hellwigcf572a92012-04-24 00:25:05 -0400393 core_tmr_drain_state_list(dev, prout_cmd, tmr_nacl, tas,
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700394 preempt_and_abort_list);
Christoph Hellwigaf877292012-07-08 15:58:49 -0400395
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800396 /*
397 * Clear any legacy SPC-2 reservation when called during
398 * LOGICAL UNIT RESET
399 */
Andy Grover6708bb22011-06-08 10:36:43 -0700400 if (!preempt_and_abort_list &&
Christoph Hellwig0fd97cc2012-10-08 00:03:19 -0400401 (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)) {
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800402 spin_lock(&dev->dev_reservation_lock);
403 dev->dev_reserved_node_acl = NULL;
Christoph Hellwig0fd97cc2012-10-08 00:03:19 -0400404 dev->dev_reservation_flags &= ~DRF_SPC2_RESERVATIONS;
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800405 spin_unlock(&dev->dev_reservation_lock);
Andy Grover6708bb22011-06-08 10:36:43 -0700406 pr_debug("LUN_RESET: SCSI-2 Released reservation\n");
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800407 }
408
Nicholas Bellinger1e7de682011-05-19 20:19:10 -0700409 spin_lock_irq(&dev->stats_lock);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800410 dev->num_resets++;
Nicholas Bellinger1e7de682011-05-19 20:19:10 -0700411 spin_unlock_irq(&dev->stats_lock);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800412
Andy Grover6708bb22011-06-08 10:36:43 -0700413 pr_debug("LUN_RESET: %s for [%s] Complete\n",
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800414 (preempt_and_abort_list) ? "Preempt" : "TMR",
Andy Grovere3d6f902011-07-19 08:55:10 +0000415 dev->transport->name);
Nicholas Bellingerc66ac9d2010-12-17 11:11:26 -0800416 return 0;
417}
Nicholas Bellingerd050ffb2011-09-28 21:37:29 -0700418