]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/target/target_core_transport.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
target: Add internal WRITE_STRIP support
[mirror_ubuntu-artful-kernel.git] / drivers / target / target_core_transport.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_transport.c
3 *
4 * This file contains the Generic Target Engine Core.
5 *
4c76251e 6 * (c) Copyright 2002-2013 Datera, Inc.
c66ac9db
NB		 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
c66ac9db
NB		 26#include <linux/net.h>
27#include <linux/delay.h>
28#include <linux/string.h>
29#include <linux/timer.h>
30#include <linux/slab.h>
c66ac9db 31#include <linux/spinlock.h>
c66ac9db
NB		 32#include <linux/kthread.h>
33#include <linux/in.h>
34#include <linux/cdrom.h>
827509e3 35#include <linux/module.h>
015487b8 36#include <linux/ratelimit.h>
c66ac9db
NB		 37#include <asm/unaligned.h>
38#include <net/sock.h>
39#include <net/tcp.h>
40#include <scsi/scsi.h>
41#include <scsi/scsi_cmnd.h>
e66ecd50 42#include <scsi/scsi_tcq.h>
c66ac9db
NB		 43
44#include <target/target_core_base.h>
c4795fb2
CH		 45#include <target/target_core_backend.h>
46#include <target/target_core_fabric.h>
c66ac9db
NB		 47#include <target/target_core_configfs.h>
48
e26d99ae 49#include "target_core_internal.h"
c66ac9db 50#include "target_core_alua.h"
c66ac9db 51#include "target_core_pr.h"
c66ac9db
NB		 52#include "target_core_ua.h"
53
e5c0d6ad
RD		 54#define CREATE_TRACE_POINTS
55#include <trace/events/target.h>
56
35e0e757 57static struct workqueue_struct *target_completion_wq;
c66ac9db 58static struct kmem_cache *se_sess_cache;
c66ac9db 59struct kmem_cache *se_ua_cache;
c66ac9db
NB		 60struct kmem_cache *t10_pr_reg_cache;
61struct kmem_cache *t10_alua_lu_gp_cache;
62struct kmem_cache *t10_alua_lu_gp_mem_cache;
63struct kmem_cache *t10_alua_tg_pt_gp_cache;
64struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
229d4f11
HR		 65struct kmem_cache *t10_alua_lba_map_cache;
66struct kmem_cache *t10_alua_lba_map_mem_cache;
c66ac9db 67
c66ac9db 68static void transport_complete_task_attr(struct se_cmd *cmd);
07bde79a 69static void transport_handle_queue_full(struct se_cmd *cmd,
e057f533 70 struct se_device *dev);
d5ddad41 71static int transport_put_cmd(struct se_cmd *cmd);
35e0e757 72static void target_complete_ok_work(struct work_struct *work);
c66ac9db 73
e3d6f909 74int init_se_kmem_caches(void)
c66ac9db 75{
c66ac9db
NB		 76 se_sess_cache = kmem_cache_create("se_sess_cache",
77 sizeof(struct se_session), __alignof__(struct se_session),
78 0, NULL);
6708bb27
AG		 79 if (!se_sess_cache) {
80 pr_err("kmem_cache_create() for struct se_session"
c66ac9db 81 " failed\n");
c8e31f26 82 goto out;
c66ac9db
NB		 83 }
84 se_ua_cache = kmem_cache_create("se_ua_cache",
85 sizeof(struct se_ua), __alignof__(struct se_ua),
86 0, NULL);
6708bb27
AG		 87 if (!se_ua_cache) {
88 pr_err("kmem_cache_create() for struct se_ua failed\n");
35e0e757 89 goto out_free_sess_cache;
c66ac9db 90 }
c66ac9db
NB		 91 t10_pr_reg_cache = kmem_cache_create("t10_pr_reg_cache",
92 sizeof(struct t10_pr_registration),
93 __alignof__(struct t10_pr_registration), 0, NULL);
6708bb27
AG		 94 if (!t10_pr_reg_cache) {
95 pr_err("kmem_cache_create() for struct t10_pr_registration"
c66ac9db 96 " failed\n");
35e0e757 97 goto out_free_ua_cache;
c66ac9db
NB		 98 }
99 t10_alua_lu_gp_cache = kmem_cache_create("t10_alua_lu_gp_cache",
100 sizeof(struct t10_alua_lu_gp), __alignof__(struct t10_alua_lu_gp),
101 0, NULL);
6708bb27
AG		 102 if (!t10_alua_lu_gp_cache) {
103 pr_err("kmem_cache_create() for t10_alua_lu_gp_cache"
c66ac9db 104 " failed\n");
35e0e757 105 goto out_free_pr_reg_cache;
c66ac9db
NB		 106 }
107 t10_alua_lu_gp_mem_cache = kmem_cache_create("t10_alua_lu_gp_mem_cache",
108 sizeof(struct t10_alua_lu_gp_member),
109 __alignof__(struct t10_alua_lu_gp_member), 0, NULL);
6708bb27
AG		 110 if (!t10_alua_lu_gp_mem_cache) {
111 pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_"
c66ac9db 112 "cache failed\n");
35e0e757 113 goto out_free_lu_gp_cache;
c66ac9db
NB		 114 }
115 t10_alua_tg_pt_gp_cache = kmem_cache_create("t10_alua_tg_pt_gp_cache",
116 sizeof(struct t10_alua_tg_pt_gp),
117 __alignof__(struct t10_alua_tg_pt_gp), 0, NULL);
6708bb27
AG		 118 if (!t10_alua_tg_pt_gp_cache) {
119 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
c66ac9db 120 "cache failed\n");
35e0e757 121 goto out_free_lu_gp_mem_cache;
c66ac9db
NB		 122 }
123 t10_alua_tg_pt_gp_mem_cache = kmem_cache_create(
124 "t10_alua_tg_pt_gp_mem_cache",
125 sizeof(struct t10_alua_tg_pt_gp_member),
126 __alignof__(struct t10_alua_tg_pt_gp_member),
127 0, NULL);
6708bb27
AG		 128 if (!t10_alua_tg_pt_gp_mem_cache) {
129 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
c66ac9db 130 "mem_t failed\n");
35e0e757 131 goto out_free_tg_pt_gp_cache;
c66ac9db 132 }
229d4f11
HR		 133 t10_alua_lba_map_cache = kmem_cache_create(
134 "t10_alua_lba_map_cache",
135 sizeof(struct t10_alua_lba_map),
136 __alignof__(struct t10_alua_lba_map), 0, NULL);
137 if (!t10_alua_lba_map_cache) {
138 pr_err("kmem_cache_create() for t10_alua_lba_map_"
139 "cache failed\n");
140 goto out_free_tg_pt_gp_mem_cache;
141 }
142 t10_alua_lba_map_mem_cache = kmem_cache_create(
143 "t10_alua_lba_map_mem_cache",
144 sizeof(struct t10_alua_lba_map_member),
145 __alignof__(struct t10_alua_lba_map_member), 0, NULL);
146 if (!t10_alua_lba_map_mem_cache) {
147 pr_err("kmem_cache_create() for t10_alua_lba_map_mem_"
148 "cache failed\n");
149 goto out_free_lba_map_cache;
150 }
c66ac9db 151
35e0e757
CH		 152 target_completion_wq = alloc_workqueue("target_completion",
153 WQ_MEM_RECLAIM, 0);
154 if (!target_completion_wq)
229d4f11 155 goto out_free_lba_map_mem_cache;
35e0e757 156
c66ac9db 157 return 0;
35e0e757 158
229d4f11
HR		 159out_free_lba_map_mem_cache:
160 kmem_cache_destroy(t10_alua_lba_map_mem_cache);
161out_free_lba_map_cache:
162 kmem_cache_destroy(t10_alua_lba_map_cache);
35e0e757
CH		 163out_free_tg_pt_gp_mem_cache:
164 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
165out_free_tg_pt_gp_cache:
166 kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
167out_free_lu_gp_mem_cache:
168 kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
169out_free_lu_gp_cache:
170 kmem_cache_destroy(t10_alua_lu_gp_cache);
171out_free_pr_reg_cache:
172 kmem_cache_destroy(t10_pr_reg_cache);
173out_free_ua_cache:
174 kmem_cache_destroy(se_ua_cache);
175out_free_sess_cache:
176 kmem_cache_destroy(se_sess_cache);
c66ac9db 177out:
e3d6f909 178 return -ENOMEM;
c66ac9db
NB		 179}
180
e3d6f909 181void release_se_kmem_caches(void)
c66ac9db 182{
35e0e757 183 destroy_workqueue(target_completion_wq);
c66ac9db
NB		 184 kmem_cache_destroy(se_sess_cache);
185 kmem_cache_destroy(se_ua_cache);
c66ac9db
NB		 186 kmem_cache_destroy(t10_pr_reg_cache);
187 kmem_cache_destroy(t10_alua_lu_gp_cache);
188 kmem_cache_destroy(t10_alua_lu_gp_mem_cache);
189 kmem_cache_destroy(t10_alua_tg_pt_gp_cache);
190 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache);
229d4f11
HR		 191 kmem_cache_destroy(t10_alua_lba_map_cache);
192 kmem_cache_destroy(t10_alua_lba_map_mem_cache);
c66ac9db
NB		 193}
194
e3d6f909
AG		 195/* This code ensures unique mib indexes are handed out. */
196static DEFINE_SPINLOCK(scsi_mib_index_lock);
197static u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX];
e89d15ee
NB		 198
199/*
200 * Allocate a new row index for the entry type specified
201 */
202u32 scsi_get_new_index(scsi_index_t type)
203{
204 u32 new_index;
205
e3d6f909 206 BUG_ON((type < 0) || (type >= SCSI_INDEX_TYPE_MAX));
e89d15ee 207
e3d6f909
AG		 208 spin_lock(&scsi_mib_index_lock);
209 new_index = ++scsi_mib_index[type];
210 spin_unlock(&scsi_mib_index_lock);
e89d15ee
NB		 211
212 return new_index;
213}
214
dbc5623e 215void transport_subsystem_check_init(void)
c66ac9db
NB		 216{
217 int ret;
283669d2 218 static int sub_api_initialized;
c66ac9db 219
dbc5623e
NB		 220 if (sub_api_initialized)
221 return;
222
c66ac9db
NB		 223 ret = request_module("target_core_iblock");
224 if (ret != 0)
6708bb27 225 pr_err("Unable to load target_core_iblock\n");
c66ac9db
NB		 226
227 ret = request_module("target_core_file");
228 if (ret != 0)
6708bb27 229 pr_err("Unable to load target_core_file\n");
c66ac9db
NB		 230
231 ret = request_module("target_core_pscsi");
232 if (ret != 0)
6708bb27 233 pr_err("Unable to load target_core_pscsi\n");
c66ac9db 234
7c9e7a6f
AG		 235 ret = request_module("target_core_user");
236 if (ret != 0)
237 pr_err("Unable to load target_core_user\n");
238
e3d6f909 239 sub_api_initialized = 1;
c66ac9db
NB		 240}
241
e70beee7 242struct se_session *transport_init_session(enum target_prot_op sup_prot_ops)
c66ac9db
NB		 243{
244 struct se_session *se_sess;
245
246 se_sess = kmem_cache_zalloc(se_sess_cache, GFP_KERNEL);
6708bb27
AG		 247 if (!se_sess) {
248 pr_err("Unable to allocate struct se_session from"
c66ac9db
NB		 249 " se_sess_cache\n");
250 return ERR_PTR(-ENOMEM);
251 }
252 INIT_LIST_HEAD(&se_sess->sess_list);
253 INIT_LIST_HEAD(&se_sess->sess_acl_list);
a17f091d 254 INIT_LIST_HEAD(&se_sess->sess_cmd_list);
9b31a328 255 INIT_LIST_HEAD(&se_sess->sess_wait_list);
a17f091d 256 spin_lock_init(&se_sess->sess_cmd_lock);
41ac82b6 257 kref_init(&se_sess->sess_kref);
e70beee7 258 se_sess->sup_prot_ops = sup_prot_ops;
c66ac9db
NB		 259
260 return se_sess;
261}
262EXPORT_SYMBOL(transport_init_session);
263
c0add7fd
NB		 264int transport_alloc_session_tags(struct se_session *se_sess,
265 unsigned int tag_num, unsigned int tag_size)
266{
267 int rc;
268
8c7f6e9b
NB		 269 se_sess->sess_cmd_map = kzalloc(tag_num * tag_size,
270 GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT);
c0add7fd 271 if (!se_sess->sess_cmd_map) {
8c7f6e9b
NB		 272 se_sess->sess_cmd_map = vzalloc(tag_num * tag_size);
273 if (!se_sess->sess_cmd_map) {
274 pr_err("Unable to allocate se_sess->sess_cmd_map\n");
275 return -ENOMEM;
276 }
c0add7fd
NB		 277 }
278
279 rc = percpu_ida_init(&se_sess->sess_tag_pool, tag_num);
280 if (rc < 0) {
281 pr_err("Unable to init se_sess->sess_tag_pool,"
282 " tag_num: %u\n", tag_num);
8c7f6e9b
NB		 283 if (is_vmalloc_addr(se_sess->sess_cmd_map))
284 vfree(se_sess->sess_cmd_map);
285 else
286 kfree(se_sess->sess_cmd_map);
c0add7fd
NB		 287 se_sess->sess_cmd_map = NULL;
288 return -ENOMEM;
289 }
290
291 return 0;
292}
293EXPORT_SYMBOL(transport_alloc_session_tags);
294
295struct se_session *transport_init_session_tags(unsigned int tag_num,
e70beee7
NB		 296 unsigned int tag_size,
297 enum target_prot_op sup_prot_ops)
c0add7fd
NB		 298{
299 struct se_session *se_sess;
300 int rc;
301
e70beee7 302 se_sess = transport_init_session(sup_prot_ops);
c0add7fd
NB		 303 if (IS_ERR(se_sess))
304 return se_sess;
305
306 rc = transport_alloc_session_tags(se_sess, tag_num, tag_size);
307 if (rc < 0) {
308 transport_free_session(se_sess);
309 return ERR_PTR(-ENOMEM);
310 }
311
312 return se_sess;
313}
314EXPORT_SYMBOL(transport_init_session_tags);
315
c66ac9db 316/*
140854cb 317 * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called.
c66ac9db
NB		 318 */
319void __transport_register_session(
320 struct se_portal_group *se_tpg,
321 struct se_node_acl *se_nacl,
322 struct se_session *se_sess,
323 void *fabric_sess_ptr)
324{
38b57f82 325 struct target_core_fabric_ops *tfo = se_tpg->se_tpg_tfo;
c66ac9db
NB		 326 unsigned char buf[PR_REG_ISID_LEN];
327
328 se_sess->se_tpg = se_tpg;
329 se_sess->fabric_sess_ptr = fabric_sess_ptr;
38b57f82
NB		 330 /*
331 * Determine if fabric allows for T10-PI feature bits to be exposed
332 * to initiators for device backends with !dev->dev_attrib.pi_prot_type
333 */
334 if (tfo->tpg_check_prot_fabric_only)
335 se_sess->sess_prot_type = tfo->tpg_check_prot_fabric_only(se_tpg);
336
c66ac9db
NB		 337 /*
338 * Used by struct se_node_acl's under ConfigFS to locate active se_session-t
339 *
340 * Only set for struct se_session's that will actually be moving I/O.
341 * eg: *NOT* discovery sessions.
342 */
343 if (se_nacl) {
344 /*
345 * If the fabric module supports an ISID based TransportID,
346 * save this value in binary from the fabric I_T Nexus now.
347 */
e3d6f909 348 if (se_tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
c66ac9db 349 memset(&buf[0], 0, PR_REG_ISID_LEN);
e3d6f909 350 se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess,
c66ac9db
NB		 351 &buf[0], PR_REG_ISID_LEN);
352 se_sess->sess_bin_isid = get_unaligned_be64(&buf[0]);
353 }
afb999ff
NB		 354 kref_get(&se_nacl->acl_kref);
355
c66ac9db
NB		 356 spin_lock_irq(&se_nacl->nacl_sess_lock);
357 /*
358 * The se_nacl->nacl_sess pointer will be set to the
359 * last active I_T Nexus for each struct se_node_acl.
360 */
361 se_nacl->nacl_sess = se_sess;
362
363 list_add_tail(&se_sess->sess_acl_list,
364 &se_nacl->acl_sess_list);
365 spin_unlock_irq(&se_nacl->nacl_sess_lock);
366 }
367 list_add_tail(&se_sess->sess_list, &se_tpg->tpg_sess_list);
368
6708bb27 369 pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n",
e3d6f909 370 se_tpg->se_tpg_tfo->get_fabric_name(), se_sess->fabric_sess_ptr);
c66ac9db
NB		 371}
372EXPORT_SYMBOL(__transport_register_session);
373
374void transport_register_session(
375 struct se_portal_group *se_tpg,
376 struct se_node_acl *se_nacl,
377 struct se_session *se_sess,
378 void *fabric_sess_ptr)
379{
140854cb
NB		 380 unsigned long flags;
381
382 spin_lock_irqsave(&se_tpg->session_lock, flags);
c66ac9db 383 __transport_register_session(se_tpg, se_nacl, se_sess, fabric_sess_ptr);
140854cb 384 spin_unlock_irqrestore(&se_tpg->session_lock, flags);
c66ac9db
NB		 385}
386EXPORT_SYMBOL(transport_register_session);
387
ecf0dd66 388static void target_release_session(struct kref *kref)
41ac82b6
NB		 389{
390 struct se_session *se_sess = container_of(kref,
391 struct se_session, sess_kref);
392 struct se_portal_group *se_tpg = se_sess->se_tpg;
393
394 se_tpg->se_tpg_tfo->close_session(se_sess);
395}
396
397void target_get_session(struct se_session *se_sess)
398{
399 kref_get(&se_sess->sess_kref);
400}
401EXPORT_SYMBOL(target_get_session);
402
33933a0e 403void target_put_session(struct se_session *se_sess)
41ac82b6 404{
4149268e
JE		 405 struct se_portal_group *tpg = se_sess->se_tpg;
406
407 if (tpg->se_tpg_tfo->put_session != NULL) {
408 tpg->se_tpg_tfo->put_session(se_sess);
409 return;
410 }
33933a0e 411 kref_put(&se_sess->sess_kref, target_release_session);
41ac82b6
NB		 412}
413EXPORT_SYMBOL(target_put_session);
414
f8e471f9
NB		 415ssize_t target_show_dynamic_sessions(struct se_portal_group *se_tpg, char *page)
416{
417 struct se_session *se_sess;
418 ssize_t len = 0;
419
420 spin_lock_bh(&se_tpg->session_lock);
421 list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) {
422 if (!se_sess->se_node_acl)
423 continue;
424 if (!se_sess->se_node_acl->dynamic_node_acl)
425 continue;
426 if (strlen(se_sess->se_node_acl->initiatorname) + 1 + len > PAGE_SIZE)
427 break;
428
429 len += snprintf(page + len, PAGE_SIZE - len, "%s\n",
430 se_sess->se_node_acl->initiatorname);
431 len += 1; /* Include NULL terminator */
432 }
433 spin_unlock_bh(&se_tpg->session_lock);
434
435 return len;
436}
437EXPORT_SYMBOL(target_show_dynamic_sessions);
438
afb999ff
NB		 439static void target_complete_nacl(struct kref *kref)
440{
441 struct se_node_acl *nacl = container_of(kref,
442 struct se_node_acl, acl_kref);
443
444 complete(&nacl->acl_free_comp);
445}
446
447void target_put_nacl(struct se_node_acl *nacl)
448{
449 kref_put(&nacl->acl_kref, target_complete_nacl);
450}
451
c66ac9db
NB		 452void transport_deregister_session_configfs(struct se_session *se_sess)
453{
454 struct se_node_acl *se_nacl;
23388864 455 unsigned long flags;
c66ac9db
NB		 456 /*
457 * Used by struct se_node_acl's under ConfigFS to locate active struct se_session
458 */
459 se_nacl = se_sess->se_node_acl;
6708bb27 460 if (se_nacl) {
23388864 461 spin_lock_irqsave(&se_nacl->nacl_sess_lock, flags);
337c0607
NB		 462 if (se_nacl->acl_stop == 0)
463 list_del(&se_sess->sess_acl_list);
c66ac9db
NB		 464 /*
465 * If the session list is empty, then clear the pointer.
466 * Otherwise, set the struct se_session pointer from the tail
467 * element of the per struct se_node_acl active session list.
468 */
469 if (list_empty(&se_nacl->acl_sess_list))
470 se_nacl->nacl_sess = NULL;
471 else {
472 se_nacl->nacl_sess = container_of(
473 se_nacl->acl_sess_list.prev,
474 struct se_session, sess_acl_list);
475 }
23388864 476 spin_unlock_irqrestore(&se_nacl->nacl_sess_lock, flags);
c66ac9db
NB		 477 }
478}
479EXPORT_SYMBOL(transport_deregister_session_configfs);
480
481void transport_free_session(struct se_session *se_sess)
482{
c0add7fd
NB		 483 if (se_sess->sess_cmd_map) {
484 percpu_ida_destroy(&se_sess->sess_tag_pool);
8c7f6e9b
NB		 485 if (is_vmalloc_addr(se_sess->sess_cmd_map))
486 vfree(se_sess->sess_cmd_map);
487 else
488 kfree(se_sess->sess_cmd_map);
c0add7fd 489 }
c66ac9db
NB		 490 kmem_cache_free(se_sess_cache, se_sess);
491}
492EXPORT_SYMBOL(transport_free_session);
493
494void transport_deregister_session(struct se_session *se_sess)
495{
496 struct se_portal_group *se_tpg = se_sess->se_tpg;
01468346 497 struct target_core_fabric_ops *se_tfo;
c66ac9db 498 struct se_node_acl *se_nacl;
e63a8e19 499 unsigned long flags;
01468346 500 bool comp_nacl = true;
c66ac9db 501
6708bb27 502 if (!se_tpg) {
c66ac9db
NB		 503 transport_free_session(se_sess);
504 return;
505 }
01468346 506 se_tfo = se_tpg->se_tpg_tfo;
c66ac9db 507
e63a8e19 508 spin_lock_irqsave(&se_tpg->session_lock, flags);
c66ac9db
NB		 509 list_del(&se_sess->sess_list);
510 se_sess->se_tpg = NULL;
511 se_sess->fabric_sess_ptr = NULL;
e63a8e19 512 spin_unlock_irqrestore(&se_tpg->session_lock, flags);
c66ac9db
NB		 513
514 /*
515 * Determine if we need to do extra work for this initiator node's
516 * struct se_node_acl if it had been previously dynamically generated.
517 */
518 se_nacl = se_sess->se_node_acl;
01468346
NB		 519
520 spin_lock_irqsave(&se_tpg->acl_node_lock, flags);
521 if (se_nacl && se_nacl->dynamic_node_acl) {
522 if (!se_tfo->tpg_check_demo_mode_cache(se_tpg)) {
523 list_del(&se_nacl->acl_list);
524 se_tpg->num_node_acls--;
525 spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags);
526 core_tpg_wait_for_nacl_pr_ref(se_nacl);
527 core_free_device_list_for_node(se_nacl, se_tpg);
528 se_tfo->tpg_release_fabric_acl(se_tpg, se_nacl);
529
530 comp_nacl = false;
531 spin_lock_irqsave(&se_tpg->acl_node_lock, flags);
c66ac9db 532 }
c66ac9db 533 }
01468346 534 spin_unlock_irqrestore(&se_tpg->acl_node_lock, flags);
c66ac9db 535
6708bb27 536 pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n",
e3d6f909 537 se_tpg->se_tpg_tfo->get_fabric_name());
01468346 538 /*
125d0119 539 * If last kref is dropping now for an explicit NodeACL, awake sleeping
afb999ff
NB		 540 * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group
541 * removal context.
01468346 542 */
0bcc297e 543 if (se_nacl && comp_nacl)
afb999ff 544 target_put_nacl(se_nacl);
01468346 545
afb999ff 546 transport_free_session(se_sess);
c66ac9db
NB		 547}
548EXPORT_SYMBOL(transport_deregister_session);
549
550/*
a1d8b49a 551 * Called with cmd->t_state_lock held.
c66ac9db 552 */
cf572a96 553static void target_remove_from_state_list(struct se_cmd *cmd)
c66ac9db 554{
42bf829e 555 struct se_device *dev = cmd->se_dev;
c66ac9db
NB		 556 unsigned long flags;
557
42bf829e
CH		 558 if (!dev)
559 return;
c66ac9db 560
cf572a96
CH		 561 if (cmd->transport_state & CMD_T_BUSY)
562 return;
c66ac9db 563
cf572a96
CH		 564 spin_lock_irqsave(&dev->execute_task_lock, flags);
565 if (cmd->state_active) {
566 list_del(&cmd->state_list);
cf572a96 567 cmd->state_active = false;
c66ac9db 568 }
cf572a96 569 spin_unlock_irqrestore(&dev->execute_task_lock, flags);
c66ac9db
NB		 570}
571
862e6389
NB		 572static int transport_cmd_check_stop(struct se_cmd *cmd, bool remove_from_lists,
573 bool write_pending)
c66ac9db
NB		 574{
575 unsigned long flags;
576
a1d8b49a 577 spin_lock_irqsave(&cmd->t_state_lock, flags);
862e6389
NB		 578 if (write_pending)
579 cmd->t_state = TRANSPORT_WRITE_PENDING;
580
f7113a47
CH		 581 if (remove_from_lists) {
582 target_remove_from_state_list(cmd);
583
584 /*
585 * Clear struct se_cmd->se_lun before the handoff to FE.
586 */
587 cmd->se_lun = NULL;
588 }
589
c66ac9db
NB		 590 /*
591 * Determine if frontend context caller is requesting the stopping of
e3d6f909 592 * this command for frontend exceptions.
c66ac9db 593 */
7d680f3b
CH		 594 if (cmd->transport_state & CMD_T_STOP) {
595 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
596 __func__, __LINE__,
e3d6f909 597 cmd->se_tfo->get_task_tag(cmd));
c66ac9db 598
a1d8b49a 599 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
c66ac9db 600
a95d6511 601 complete_all(&cmd->t_transport_stop_comp);
c66ac9db
NB		 602 return 1;
603 }
f7113a47
CH		 604
605 cmd->transport_state &= ~CMD_T_ACTIVE;
606 if (remove_from_lists) {
607 /*
608 * Some fabric modules like tcm_loop can release
609 * their internally allocated I/O reference now and
610 * struct se_cmd now.
611 *
612 * Fabric modules are expected to return '1' here if the
613 * se_cmd being passed is released at this point,
614 * or zero if not being released.
615 */
616 if (cmd->se_tfo->check_stop_free != NULL) {
617 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
618 return cmd->se_tfo->check_stop_free(cmd);
c66ac9db 619 }
f7113a47 620 }
c66ac9db 621
a1d8b49a 622 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
c66ac9db
NB		 623 return 0;
624}
625
626static int transport_cmd_check_stop_to_fabric(struct se_cmd *cmd)
627{
862e6389 628 return transport_cmd_check_stop(cmd, true, false);
c66ac9db
NB		 629}
630
631static void transport_lun_remove_cmd(struct se_cmd *cmd)
632{
e3d6f909 633 struct se_lun *lun = cmd->se_lun;
c66ac9db 634
5259a06e 635 if (!lun)
c66ac9db
NB		 636 return;
637
5259a06e
NB		 638 if (cmpxchg(&cmd->lun_ref_active, true, false))
639 percpu_ref_put(&lun->lun_ref);
c66ac9db
NB		 640}
641
642void transport_cmd_finish_abort(struct se_cmd *cmd, int remove)
643{
68259b5a
AL		 644 if (cmd->se_cmd_flags & SCF_SE_LUN_CMD)
645 transport_lun_remove_cmd(cmd);
131e6abc
NB		 646 /*
647 * Allow the fabric driver to unmap any resources before
648 * releasing the descriptor via TFO->release_cmd()
649 */
650 if (remove)
651 cmd->se_tfo->aborted_task(cmd);
68259b5a 652
c66ac9db
NB		 653 if (transport_cmd_check_stop_to_fabric(cmd))
654 return;
af877292 655 if (remove)
e6a2573f 656 transport_put_cmd(cmd);
c66ac9db
NB		 657}
658
35e0e757
CH		 659static void target_complete_failure_work(struct work_struct *work)
660{
661 struct se_cmd *cmd = container_of(work, struct se_cmd, work);
662
de103c93
CH		 663 transport_generic_request_failure(cmd,
664 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE);
35e0e757
CH		 665}
666
6138ed2a 667/*
d5829eac
PB		 668 * Used when asking transport to copy Sense Data from the underlying
669 * Linux/SCSI struct scsi_cmnd
6138ed2a 670 */
d5829eac 671static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd)
6138ed2a 672{
6138ed2a 673 struct se_device *dev = cmd->se_dev;
6138ed2a
PB		 674
675 WARN_ON(!cmd->se_lun);
676
677 if (!dev)
d5829eac 678 return NULL;
6138ed2a 679
d5829eac
PB		 680 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION)
681 return NULL;
6138ed2a 682
9c58b7dd 683 cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER;
6138ed2a 684
d5829eac 685 pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n",
6138ed2a 686 dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status);
9c58b7dd 687 return cmd->sense_buffer;
6138ed2a
PB		 688}
689
5787cacd 690void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
c66ac9db 691{
42bf829e 692 struct se_device *dev = cmd->se_dev;
5787cacd 693 int success = scsi_status == GOOD;
c66ac9db 694 unsigned long flags;
c66ac9db 695
5787cacd
CH		 696 cmd->scsi_status = scsi_status;
697
698
a1d8b49a 699 spin_lock_irqsave(&cmd->t_state_lock, flags);
cf572a96 700 cmd->transport_state &= ~CMD_T_BUSY;
c66ac9db 701
c66ac9db 702 if (dev && dev->transport->transport_complete) {
d5829eac
PB		 703 dev->transport->transport_complete(cmd,
704 cmd->t_data_sg,
705 transport_get_sense_buffer(cmd));
706 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE)
c66ac9db 707 success = 1;
c66ac9db
NB		 708 }
709
710 /*
5787cacd 711 * See if we are waiting to complete for an exception condition.
c66ac9db 712 */
cf572a96 713 if (cmd->transport_state & CMD_T_REQUEST_STOP) {
a1d8b49a 714 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
cf572a96 715 complete(&cmd->task_stop_comp);
c66ac9db
NB		 716 return;
717 }
2235007c 718
3d28934a 719 /*
125d0119 720 * Check for case where an explicit ABORT_TASK has been received
3d28934a
NB		 721 * and transport_wait_for_tasks() will be waiting for completion..
722 */
723 if (cmd->transport_state & CMD_T_ABORTED &&
724 cmd->transport_state & CMD_T_STOP) {
725 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
a95d6511 726 complete_all(&cmd->t_transport_stop_comp);
3d28934a 727 return;
3dca1471 728 } else if (!success) {
35e0e757 729 INIT_WORK(&cmd->work, target_complete_failure_work);
c66ac9db 730 } else {
35e0e757 731 INIT_WORK(&cmd->work, target_complete_ok_work);
c66ac9db 732 }
35e0e757 733
35e0e757 734 cmd->t_state = TRANSPORT_COMPLETE;
3d28934a 735 cmd->transport_state |= (CMD_T_COMPLETE | CMD_T_ACTIVE);
a1d8b49a 736 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
c66ac9db 737
35e0e757 738 queue_work(target_completion_wq, &cmd->work);
c66ac9db 739}
6bb35e00
CH		 740EXPORT_SYMBOL(target_complete_cmd);
741
2426bd45
RD		 742void target_complete_cmd_with_length(struct se_cmd *cmd, u8 scsi_status, int length)
743{
744 if (scsi_status == SAM_STAT_GOOD && length < cmd->data_length) {
745 if (cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
746 cmd->residual_count += cmd->data_length - length;
747 } else {
748 cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
749 cmd->residual_count = cmd->data_length - length;
750 }
751
752 cmd->data_length = length;
753 }
754
755 target_complete_cmd(cmd, scsi_status);
756}
757EXPORT_SYMBOL(target_complete_cmd_with_length);
758
cf572a96 759static void target_add_to_state_list(struct se_cmd *cmd)
c66ac9db 760{
cf572a96
CH		 761 struct se_device *dev = cmd->se_dev;
762 unsigned long flags;
c66ac9db 763
cf572a96
CH		 764 spin_lock_irqsave(&dev->execute_task_lock, flags);
765 if (!cmd->state_active) {
766 list_add_tail(&cmd->state_list, &dev->state_list);
767 cmd->state_active = true;
c66ac9db 768 }
cf572a96 769 spin_unlock_irqrestore(&dev->execute_task_lock, flags);
c66ac9db
NB		 770}
771
07bde79a 772/*
f147abb4 773 * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status
07bde79a 774 */
7a6f0a1e
CH		 775static void transport_write_pending_qf(struct se_cmd *cmd);
776static void transport_complete_qf(struct se_cmd *cmd);
07bde79a 777
0fd97ccf 778void target_qf_do_work(struct work_struct *work)
07bde79a
NB		 779{
780 struct se_device *dev = container_of(work, struct se_device,
781 qf_work_queue);
bcac364a 782 LIST_HEAD(qf_cmd_list);
07bde79a
NB		 783 struct se_cmd *cmd, *cmd_tmp;
784
785 spin_lock_irq(&dev->qf_cmd_lock);
bcac364a
RD		 786 list_splice_init(&dev->qf_cmd_list, &qf_cmd_list);
787 spin_unlock_irq(&dev->qf_cmd_lock);
07bde79a 788
bcac364a 789 list_for_each_entry_safe(cmd, cmd_tmp, &qf_cmd_list, se_qf_node) {
07bde79a 790 list_del(&cmd->se_qf_node);
33940d09 791 atomic_dec_mb(&dev->dev_qf_count);
07bde79a 792
6708bb27 793 pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue"
07bde79a 794 " context: %s\n", cmd->se_tfo->get_fabric_name(), cmd,
e057f533 795 (cmd->t_state == TRANSPORT_COMPLETE_QF_OK) ? "COMPLETE_OK" :
07bde79a
NB		 796 (cmd->t_state == TRANSPORT_COMPLETE_QF_WP) ? "WRITE_PENDING"
797 : "UNKNOWN");
f7a5cc0b 798
7a6f0a1e
CH		 799 if (cmd->t_state == TRANSPORT_COMPLETE_QF_WP)
800 transport_write_pending_qf(cmd);
801 else if (cmd->t_state == TRANSPORT_COMPLETE_QF_OK)
802 transport_complete_qf(cmd);
07bde79a 803 }
07bde79a
NB		 804}
805
c66ac9db
NB		 806unsigned char *transport_dump_cmd_direction(struct se_cmd *cmd)
807{
808 switch (cmd->data_direction) {
809 case DMA_NONE:
810 return "NONE";
811 case DMA_FROM_DEVICE:
812 return "READ";
813 case DMA_TO_DEVICE:
814 return "WRITE";
815 case DMA_BIDIRECTIONAL:
816 return "BIDI";
817 default:
818 break;
819 }
820
821 return "UNKNOWN";
822}
823
824void transport_dump_dev_state(
825 struct se_device *dev,
826 char *b,
827 int *bl)
828{
829 *bl += sprintf(b + *bl, "Status: ");
0fd97ccf 830 if (dev->export_count)
c66ac9db 831 *bl += sprintf(b + *bl, "ACTIVATED");
0fd97ccf 832 else
c66ac9db 833 *bl += sprintf(b + *bl, "DEACTIVATED");
c66ac9db 834
5f41a31d 835 *bl += sprintf(b + *bl, " Max Queue Depth: %d", dev->queue_depth);
11e764bd 836 *bl += sprintf(b + *bl, " SectorSize: %u HwMaxSectors: %u\n",
0fd97ccf
CH		 837 dev->dev_attrib.block_size,
838 dev->dev_attrib.hw_max_sectors);
c66ac9db
NB		 839 *bl += sprintf(b + *bl, " ");
840}
841
c66ac9db
NB		 842void transport_dump_vpd_proto_id(
843 struct t10_vpd *vpd,
844 unsigned char *p_buf,
845 int p_buf_len)
846{
847 unsigned char buf[VPD_TMP_BUF_SIZE];
848 int len;
849
850 memset(buf, 0, VPD_TMP_BUF_SIZE);
851 len = sprintf(buf, "T10 VPD Protocol Identifier: ");
852
853 switch (vpd->protocol_identifier) {
854 case 0x00:
855 sprintf(buf+len, "Fibre Channel\n");
856 break;
857 case 0x10:
858 sprintf(buf+len, "Parallel SCSI\n");
859 break;
860 case 0x20:
861 sprintf(buf+len, "SSA\n");
862 break;
863 case 0x30:
864 sprintf(buf+len, "IEEE 1394\n");
865 break;
866 case 0x40:
867 sprintf(buf+len, "SCSI Remote Direct Memory Access"
868 " Protocol\n");
869 break;
870 case 0x50:
871 sprintf(buf+len, "Internet SCSI (iSCSI)\n");
872 break;
873 case 0x60:
874 sprintf(buf+len, "SAS Serial SCSI Protocol\n");
875 break;
876 case 0x70:
877 sprintf(buf+len, "Automation/Drive Interface Transport"
878 " Protocol\n");
879 break;
880 case 0x80:
881 sprintf(buf+len, "AT Attachment Interface ATA/ATAPI\n");
882 break;
883 default:
884 sprintf(buf+len, "Unknown 0x%02x\n",
885 vpd->protocol_identifier);
886 break;
887 }
888
889 if (p_buf)
890 strncpy(p_buf, buf, p_buf_len);
891 else
6708bb27 892 pr_debug("%s", buf);
c66ac9db
NB		 893}
894
895void
896transport_set_vpd_proto_id(struct t10_vpd *vpd, unsigned char *page_83)
897{
898 /*
899 * Check if the Protocol Identifier Valid (PIV) bit is set..
900 *
901 * from spc3r23.pdf section 7.5.1
902 */
903 if (page_83[1] & 0x80) {
904 vpd->protocol_identifier = (page_83[0] & 0xf0);
905 vpd->protocol_identifier_set = 1;
906 transport_dump_vpd_proto_id(vpd, NULL, 0);
907 }
908}
909EXPORT_SYMBOL(transport_set_vpd_proto_id);
910
911int transport_dump_vpd_assoc(
912 struct t10_vpd *vpd,
913 unsigned char *p_buf,
914 int p_buf_len)
915{
916 unsigned char buf[VPD_TMP_BUF_SIZE];
e3d6f909
AG		 917 int ret = 0;
918 int len;
c66ac9db
NB		 919
920 memset(buf, 0, VPD_TMP_BUF_SIZE);
921 len = sprintf(buf, "T10 VPD Identifier Association: ");
922
923 switch (vpd->association) {
924 case 0x00:
925 sprintf(buf+len, "addressed logical unit\n");
926 break;
927 case 0x10:
928 sprintf(buf+len, "target port\n");
929 break;
930 case 0x20:
931 sprintf(buf+len, "SCSI target device\n");
932 break;
933 default:
934 sprintf(buf+len, "Unknown 0x%02x\n", vpd->association);
e3d6f909 935 ret = -EINVAL;
c66ac9db
NB		 936 break;
937 }
938
939 if (p_buf)
940 strncpy(p_buf, buf, p_buf_len);
941 else
6708bb27 942 pr_debug("%s", buf);
c66ac9db
NB		 943
944 return ret;
945}
946
947int transport_set_vpd_assoc(struct t10_vpd *vpd, unsigned char *page_83)
948{
949 /*
950 * The VPD identification association..
951 *
952 * from spc3r23.pdf Section 7.6.3.1 Table 297
953 */
954 vpd->association = (page_83[1] & 0x30);
955 return transport_dump_vpd_assoc(vpd, NULL, 0);
956}
957EXPORT_SYMBOL(transport_set_vpd_assoc);
958
959int transport_dump_vpd_ident_type(
960 struct t10_vpd *vpd,
961 unsigned char *p_buf,
962 int p_buf_len)
963{
964 unsigned char buf[VPD_TMP_BUF_SIZE];
e3d6f909
AG		 965 int ret = 0;
966 int len;
c66ac9db
NB		 967
968 memset(buf, 0, VPD_TMP_BUF_SIZE);
969 len = sprintf(buf, "T10 VPD Identifier Type: ");
970
971 switch (vpd->device_identifier_type) {
972 case 0x00:
973 sprintf(buf+len, "Vendor specific\n");
974 break;
975 case 0x01:
976 sprintf(buf+len, "T10 Vendor ID based\n");
977 break;
978 case 0x02:
979 sprintf(buf+len, "EUI-64 based\n");
980 break;
981 case 0x03:
982 sprintf(buf+len, "NAA\n");
983 break;
984 case 0x04:
985 sprintf(buf+len, "Relative target port identifier\n");
986 break;
987 case 0x08:
988 sprintf(buf+len, "SCSI name string\n");
989 break;
990 default:
991 sprintf(buf+len, "Unsupported: 0x%02x\n",
992 vpd->device_identifier_type);
e3d6f909 993 ret = -EINVAL;
c66ac9db
NB		 994 break;
995 }
996
e3d6f909
AG		 997 if (p_buf) {
998 if (p_buf_len < strlen(buf)+1)
999 return -EINVAL;
c66ac9db 1000 strncpy(p_buf, buf, p_buf_len);
e3d6f909 1001 } else {
6708bb27 1002 pr_debug("%s", buf);
e3d6f909 1003 }
c66ac9db
NB		 1004
1005 return ret;
1006}
1007
1008int transport_set_vpd_ident_type(struct t10_vpd *vpd, unsigned char *page_83)
1009{
1010 /*
1011 * The VPD identifier type..
1012 *
1013 * from spc3r23.pdf Section 7.6.3.1 Table 298
1014 */
1015 vpd->device_identifier_type = (page_83[1] & 0x0f);
1016 return transport_dump_vpd_ident_type(vpd, NULL, 0);
1017}
1018EXPORT_SYMBOL(transport_set_vpd_ident_type);
1019
1020int transport_dump_vpd_ident(
1021 struct t10_vpd *vpd,
1022 unsigned char *p_buf,
1023 int p_buf_len)
1024{
1025 unsigned char buf[VPD_TMP_BUF_SIZE];
1026 int ret = 0;
1027
1028 memset(buf, 0, VPD_TMP_BUF_SIZE);
1029
1030 switch (vpd->device_identifier_code_set) {
1031 case 0x01: /* Binary */
703d641d
DC		 1032 snprintf(buf, sizeof(buf),
1033 "T10 VPD Binary Device Identifier: %s\n",
c66ac9db
NB		 1034 &vpd->device_identifier[0]);
1035 break;
1036 case 0x02: /* ASCII */
703d641d
DC		 1037 snprintf(buf, sizeof(buf),
1038 "T10 VPD ASCII Device Identifier: %s\n",
c66ac9db
NB		 1039 &vpd->device_identifier[0]);
1040 break;
1041 case 0x03: /* UTF-8 */
703d641d
DC		 1042 snprintf(buf, sizeof(buf),
1043 "T10 VPD UTF-8 Device Identifier: %s\n",
c66ac9db
NB		 1044 &vpd->device_identifier[0]);
1045 break;
1046 default:
1047 sprintf(buf, "T10 VPD Device Identifier encoding unsupported:"
1048 " 0x%02x", vpd->device_identifier_code_set);
e3d6f909 1049 ret = -EINVAL;
c66ac9db
NB		 1050 break;
1051 }
1052
1053 if (p_buf)
1054 strncpy(p_buf, buf, p_buf_len);
1055 else
6708bb27 1056 pr_debug("%s", buf);
c66ac9db
NB		 1057
1058 return ret;
1059}
1060
1061int
1062transport_set_vpd_ident(struct t10_vpd *vpd, unsigned char *page_83)
1063{
1064 static const char hex_str[] = "0123456789abcdef";
35d1efe8 1065 int j = 0, i = 4; /* offset to start of the identifier */
c66ac9db
NB		 1066
1067 /*
1068 * The VPD Code Set (encoding)
1069 *
1070 * from spc3r23.pdf Section 7.6.3.1 Table 296
1071 */
1072 vpd->device_identifier_code_set = (page_83[0] & 0x0f);
1073 switch (vpd->device_identifier_code_set) {
1074 case 0x01: /* Binary */
1075 vpd->device_identifier[j++] =
1076 hex_str[vpd->device_identifier_type];
1077 while (i < (4 + page_83[3])) {
1078 vpd->device_identifier[j++] =
1079 hex_str[(page_83[i] & 0xf0) >> 4];
1080 vpd->device_identifier[j++] =
1081 hex_str[page_83[i] & 0x0f];
1082 i++;
1083 }
1084 break;
1085 case 0x02: /* ASCII */
1086 case 0x03: /* UTF-8 */
1087 while (i < (4 + page_83[3]))
1088 vpd->device_identifier[j++] = page_83[i++];
1089 break;
1090 default:
1091 break;
1092 }
1093
1094 return transport_dump_vpd_ident(vpd, NULL, 0);
1095}
1096EXPORT_SYMBOL(transport_set_vpd_ident);
1097
de103c93
CH		 1098sense_reason_t
1099target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
9b3b8041
CH		 1100{
1101 struct se_device *dev = cmd->se_dev;
1102
1103 if (cmd->unknown_data_length) {
1104 cmd->data_length = size;
1105 } else if (size != cmd->data_length) {
1106 pr_warn("TARGET_CORE[%s]: Expected Transfer Length:"
1107 " %u does not match SCSI CDB Length: %u for SAM Opcode:"
1108 " 0x%02x\n", cmd->se_tfo->get_fabric_name(),
1109 cmd->data_length, size, cmd->t_task_cdb[0]);
1110
9b3b8041
CH		 1111 if (cmd->data_direction == DMA_TO_DEVICE) {
1112 pr_err("Rejecting underflow/overflow"
1113 " WRITE data\n");
de103c93 1114 return TCM_INVALID_CDB_FIELD;
9b3b8041
CH		 1115 }
1116 /*
1117 * Reject READ_* or WRITE_* with overflow/underflow for
1118 * type SCF_SCSI_DATA_CDB.
1119 */
0fd97ccf 1120 if (dev->dev_attrib.block_size != 512) {
9b3b8041
CH		 1121 pr_err("Failing OVERFLOW/UNDERFLOW for LBA op"
1122 " CDB on non 512-byte sector setup subsystem"
1123 " plugin: %s\n", dev->transport->name);
1124 /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
de103c93 1125 return TCM_INVALID_CDB_FIELD;
9b3b8041 1126 }
4c054ba6
NB		 1127 /*
1128 * For the overflow case keep the existing fabric provided
1129 * ->data_length. Otherwise for the underflow case, reset
1130 * ->data_length to the smaller SCSI expected data transfer
1131 * length.
1132 */
9b3b8041
CH		 1133 if (size > cmd->data_length) {
1134 cmd->se_cmd_flags |= SCF_OVERFLOW_BIT;
1135 cmd->residual_count = (size - cmd->data_length);
1136 } else {
1137 cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
1138 cmd->residual_count = (cmd->data_length - size);
4c054ba6 1139 cmd->data_length = size;
9b3b8041 1140 }
9b3b8041
CH		 1141 }
1142
1143 return 0;
1144
9b3b8041
CH		 1145}
1146
c66ac9db
NB		 1147/*
1148 * Used by fabric modules containing a local struct se_cmd within their
1149 * fabric dependent per I/O descriptor.
1150 */
1151void transport_init_se_cmd(
1152 struct se_cmd *cmd,
1153 struct target_core_fabric_ops *tfo,
1154 struct se_session *se_sess,
1155 u32 data_length,
1156 int data_direction,
1157 int task_attr,
1158 unsigned char *sense_buffer)
1159{
5951146d 1160 INIT_LIST_HEAD(&cmd->se_delayed_node);
07bde79a 1161 INIT_LIST_HEAD(&cmd->se_qf_node);
a17f091d 1162 INIT_LIST_HEAD(&cmd->se_cmd_list);
cf572a96 1163 INIT_LIST_HEAD(&cmd->state_list);
a1d8b49a 1164 init_completion(&cmd->t_transport_stop_comp);
a17f091d 1165 init_completion(&cmd->cmd_wait_comp);
cf572a96 1166 init_completion(&cmd->task_stop_comp);
a1d8b49a 1167 spin_lock_init(&cmd->t_state_lock);
1e1110c4 1168 kref_init(&cmd->cmd_kref);
7d680f3b 1169 cmd->transport_state = CMD_T_DEV_ACTIVE;
c66ac9db
NB		 1170
1171 cmd->se_tfo = tfo;
1172 cmd->se_sess = se_sess;
1173 cmd->data_length = data_length;
1174 cmd->data_direction = data_direction;
1175 cmd->sam_task_attr = task_attr;
1176 cmd->sense_buffer = sense_buffer;
cf572a96
CH		 1177
1178 cmd->state_active = false;
c66ac9db
NB		 1179}
1180EXPORT_SYMBOL(transport_init_se_cmd);
1181
de103c93
CH		 1182static sense_reason_t
1183transport_check_alloc_task_attr(struct se_cmd *cmd)
c66ac9db 1184{
019c4ca6
CH		 1185 struct se_device *dev = cmd->se_dev;
1186
c66ac9db
NB		 1187 /*
1188 * Check if SAM Task Attribute emulation is enabled for this
1189 * struct se_device storage object
1190 */
019c4ca6 1191 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
c66ac9db
NB		 1192 return 0;
1193
68d81f40 1194 if (cmd->sam_task_attr == TCM_ACA_TAG) {
6708bb27 1195 pr_debug("SAM Task Attribute ACA"
c66ac9db 1196 " emulation is not supported\n");
de103c93 1197 return TCM_INVALID_CDB_FIELD;
c66ac9db
NB		 1198 }
1199 /*
1200 * Used to determine when ORDERED commands should go from
1201 * Dormant to Active status.
1202 */
019c4ca6 1203 cmd->se_ordered_id = atomic_inc_return(&dev->dev_ordered_id);
6708bb27 1204 pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n",
c66ac9db 1205 cmd->se_ordered_id, cmd->sam_task_attr,
019c4ca6 1206 dev->transport->name);
c66ac9db
NB		 1207 return 0;
1208}
1209
de103c93
CH		 1210sense_reason_t
1211target_setup_cmd_from_cdb(struct se_cmd *cmd, unsigned char *cdb)
c66ac9db 1212{
0fd97ccf 1213 struct se_device *dev = cmd->se_dev;
de103c93 1214 sense_reason_t ret;
c66ac9db 1215
c66ac9db
NB		 1216 /*
1217 * Ensure that the received CDB is less than the max (252 + 8) bytes
1218 * for VARIABLE_LENGTH_CMD
1219 */
1220 if (scsi_command_size(cdb) > SCSI_MAX_VARLEN_CDB_SIZE) {
6708bb27 1221 pr_err("Received SCSI CDB with command_size: %d that"
c66ac9db
NB		 1222 " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
1223 scsi_command_size(cdb), SCSI_MAX_VARLEN_CDB_SIZE);
de103c93 1224 return TCM_INVALID_CDB_FIELD;
c66ac9db
NB		 1225 }
1226 /*
1227 * If the received CDB is larger than TCM_MAX_COMMAND_SIZE,
1228 * allocate the additional extended CDB buffer now.. Otherwise
1229 * setup the pointer from __t_task_cdb to t_task_cdb.
1230 */
a1d8b49a
AG		 1231 if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) {
1232 cmd->t_task_cdb = kzalloc(scsi_command_size(cdb),
c66ac9db 1233 GFP_KERNEL);
6708bb27
AG		 1234 if (!cmd->t_task_cdb) {
1235 pr_err("Unable to allocate cmd->t_task_cdb"
a1d8b49a 1236 " %u > sizeof(cmd->__t_task_cdb): %lu ops\n",
c66ac9db 1237 scsi_command_size(cdb),
a1d8b49a 1238 (unsigned long)sizeof(cmd->__t_task_cdb));
de103c93 1239 return TCM_OUT_OF_RESOURCES;
c66ac9db
NB		 1240 }
1241 } else
a1d8b49a 1242 cmd->t_task_cdb = &cmd->__t_task_cdb[0];
c66ac9db 1243 /*
a1d8b49a 1244 * Copy the original CDB into cmd->
c66ac9db 1245 */
a1d8b49a 1246 memcpy(cmd->t_task_cdb, cdb, scsi_command_size(cdb));
cb4f4d3c 1247
e5c0d6ad
RD		 1248 trace_target_sequencer_start(cmd);
1249
cb4f4d3c
CH		 1250 /*
1251 * Check for an existing UNIT ATTENTION condition
1252 */
de103c93
CH		 1253 ret = target_scsi3_ua_check(cmd);
1254 if (ret)
1255 return ret;
cb4f4d3c 1256
c87fbd56 1257 ret = target_alua_state_check(cmd);
de103c93
CH		 1258 if (ret)
1259 return ret;
cb4f4d3c 1260
d977f437 1261 ret = target_check_reservation(cmd);
f85eda8d
NB		 1262 if (ret) {
1263 cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
d977f437 1264 return ret;
f85eda8d 1265 }
cb4f4d3c 1266
0fd97ccf 1267 ret = dev->transport->parse_cdb(cmd);
de103c93
CH		 1268 if (ret)
1269 return ret;
1270
1271 ret = transport_check_alloc_task_attr(cmd);
1272 if (ret)
c66ac9db 1273 return ret;
cb4f4d3c 1274
cb4f4d3c 1275 cmd->se_cmd_flags |= SCF_SUPPORTED_SAM_OPCODE;
cb4f4d3c 1276
c66ac9db
NB		 1277 spin_lock(&cmd->se_lun->lun_sep_lock);
1278 if (cmd->se_lun->lun_sep)
1279 cmd->se_lun->lun_sep->sep_stats.cmd_pdus++;
1280 spin_unlock(&cmd->se_lun->lun_sep_lock);
1281 return 0;
1282}
a12f41f8 1283EXPORT_SYMBOL(target_setup_cmd_from_cdb);
c66ac9db 1284
695434e1
NB		 1285/*
1286 * Used by fabric module frontends to queue tasks directly.
1287 * Many only be used from process context only
1288 */
1289int transport_handle_cdb_direct(
1290 struct se_cmd *cmd)
1291{
de103c93 1292 sense_reason_t ret;
dd8ae59d 1293
695434e1
NB		 1294 if (!cmd->se_lun) {
1295 dump_stack();
6708bb27 1296 pr_err("cmd->se_lun is NULL\n");
695434e1
NB		 1297 return -EINVAL;
1298 }
1299 if (in_interrupt()) {
1300 dump_stack();
6708bb27 1301 pr_err("transport_generic_handle_cdb cannot be called"
695434e1
NB		 1302 " from interrupt context\n");
1303 return -EINVAL;
1304 }
dd8ae59d 1305 /*
af877292
CH		 1306 * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that
1307 * outstanding descriptors are handled correctly during shutdown via
1308 * transport_wait_for_tasks()
dd8ae59d
NB		 1309 *
1310 * Also, we don't take cmd->t_state_lock here as we only expect
1311 * this to be called for initial descriptor submission.
1312 */
1313 cmd->t_state = TRANSPORT_NEW_CMD;
7d680f3b
CH		 1314 cmd->transport_state |= CMD_T_ACTIVE;
1315
dd8ae59d
NB		 1316 /*
1317 * transport_generic_new_cmd() is already handling QUEUE_FULL,
1318 * so follow TRANSPORT_NEW_CMD processing thread context usage
1319 * and call transport_generic_request_failure() if necessary..
1320 */
1321 ret = transport_generic_new_cmd(cmd);
de103c93
CH		 1322 if (ret)
1323 transport_generic_request_failure(cmd, ret);
dd8ae59d 1324 return 0;
695434e1
NB		 1325}
1326EXPORT_SYMBOL(transport_handle_cdb_direct);
1327
c5ff8d6b 1328sense_reason_t
de103c93
CH		 1329transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
1330 u32 sgl_count, struct scatterlist *sgl_bidi, u32 sgl_bidi_count)
1331{
1332 if (!sgl || !sgl_count)
1333 return 0;
1334
1335 /*
1336 * Reject SCSI data overflow with map_mem_to_cmd() as incoming
1337 * scatterlists already have been set to follow what the fabric
1338 * passes for the original expected data transfer length.
1339 */
1340 if (cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1341 pr_warn("Rejecting SCSI DATA overflow for fabric using"
1342 " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n");
1343 return TCM_INVALID_CDB_FIELD;
1344 }
1345
1346 cmd->t_data_sg = sgl;
1347 cmd->t_data_nents = sgl_count;
1348
1349 if (sgl_bidi && sgl_bidi_count) {
1350 cmd->t_bidi_data_sg = sgl_bidi;
1351 cmd->t_bidi_data_nents = sgl_bidi_count;
1352 }
1353 cmd->se_cmd_flags |= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC;
1354 return 0;
1355}
1356
a026757f
NB		 1357/*
1358 * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized
1359 * se_cmd + use pre-allocated SGL memory.
a6360785
NB		 1360 *
1361 * @se_cmd: command descriptor to submit
1362 * @se_sess: associated se_sess for endpoint
1363 * @cdb: pointer to SCSI CDB
1364 * @sense: pointer to SCSI sense buffer
1365 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1366 * @data_length: fabric expected data transfer length
1367 * @task_addr: SAM task attribute
1368 * @data_dir: DMA data direction
1369 * @flags: flags for command submission from target_sc_flags_tables
a026757f
NB		 1370 * @sgl: struct scatterlist memory for unidirectional mapping
1371 * @sgl_count: scatterlist count for unidirectional mapping
1372 * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping
1373 * @sgl_bidi_count: scatterlist count for bidirectional READ mapping
def2b339
NB		 1374 * @sgl_prot: struct scatterlist memory protection information
1375 * @sgl_prot_count: scatterlist count for protection information
a6360785 1376 *
d6dfc868
RD		 1377 * Returns non zero to signal active I/O shutdown failure. All other
1378 * setup exceptions will be returned as a SCSI CHECK_CONDITION response,
1379 * but still return zero here.
1380 *
a6360785
NB		 1381 * This may only be called from process context, and also currently
1382 * assumes internal allocation of fabric payload buffer by target-core.
a026757f
NB		 1383 */
1384int target_submit_cmd_map_sgls(struct se_cmd *se_cmd, struct se_session *se_sess,
a6360785 1385 unsigned char *cdb, unsigned char *sense, u32 unpacked_lun,
a026757f
NB		 1386 u32 data_length, int task_attr, int data_dir, int flags,
1387 struct scatterlist *sgl, u32 sgl_count,
def2b339
NB		 1388 struct scatterlist *sgl_bidi, u32 sgl_bidi_count,
1389 struct scatterlist *sgl_prot, u32 sgl_prot_count)
a6360785
NB		 1390{
1391 struct se_portal_group *se_tpg;
de103c93
CH		 1392 sense_reason_t rc;
1393 int ret;
a6360785
NB		 1394
1395 se_tpg = se_sess->se_tpg;
1396 BUG_ON(!se_tpg);
1397 BUG_ON(se_cmd->se_tfo || se_cmd->se_sess);
1398 BUG_ON(in_interrupt());
1399 /*
1400 * Initialize se_cmd for target operation. From this point
1401 * exceptions are handled by sending exception status via
1402 * target_core_fabric_ops->queue_status() callback
1403 */
1404 transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
1405 data_length, data_dir, task_attr, sense);
b0d79946
SAS		 1406 if (flags & TARGET_SCF_UNKNOWN_SIZE)
1407 se_cmd->unknown_data_length = 1;
a6360785
NB		 1408 /*
1409 * Obtain struct se_cmd->cmd_kref reference and add new cmd to
1410 * se_sess->sess_cmd_list. A second kref_get here is necessary
1411 * for fabrics using TARGET_SCF_ACK_KREF that expect a second
1412 * kref_put() to happen during fabric packet acknowledgement.
1413 */
de103c93
CH		 1414 ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
1415 if (ret)
1416 return ret;
a6360785
NB		 1417 /*
1418 * Signal bidirectional data payloads to target-core
1419 */
1420 if (flags & TARGET_SCF_BIDI_OP)
1421 se_cmd->se_cmd_flags |= SCF_BIDI;
1422 /*
1423 * Locate se_lun pointer and attach it to struct se_cmd
1424 */
de103c93
CH		 1425 rc = transport_lookup_cmd_lun(se_cmd, unpacked_lun);
1426 if (rc) {
1427 transport_send_check_condition_and_sense(se_cmd, rc, 0);
735703ca 1428 target_put_sess_cmd(se_sess, se_cmd);
d6dfc868 1429 return 0;
735703ca 1430 }
b5b8e298
SG		 1431
1432 rc = target_setup_cmd_from_cdb(se_cmd, cdb);
1433 if (rc != 0) {
1434 transport_generic_request_failure(se_cmd, rc);
1435 return 0;
1436 }
1437
def2b339
NB		 1438 /*
1439 * Save pointers for SGLs containing protection information,
1440 * if present.
1441 */
1442 if (sgl_prot_count) {
1443 se_cmd->t_prot_sg = sgl_prot;
1444 se_cmd->t_prot_nents = sgl_prot_count;
1445 }
d6e0175c 1446
a026757f
NB		 1447 /*
1448 * When a non zero sgl_count has been passed perform SGL passthrough
1449 * mapping for pre-allocated fabric memory instead of having target
1450 * core perform an internal SGL allocation..
1451 */
1452 if (sgl_count != 0) {
1453 BUG_ON(!sgl);
1454
944981c7
NB		 1455 /*
1456 * A work-around for tcm_loop as some userspace code via
1457 * scsi-generic do not memset their associated read buffers,
1458 * so go ahead and do that here for type non-data CDBs. Also
1459 * note that this is currently guaranteed to be a single SGL
1460 * for this case by target core in target_setup_cmd_from_cdb()
1461 * -> transport_generic_cmd_sequencer().
1462 */
1463 if (!(se_cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) &&
1464 se_cmd->data_direction == DMA_FROM_DEVICE) {
1465 unsigned char *buf = NULL;
1466
1467 if (sgl)
1468 buf = kmap(sg_page(sgl)) + sgl->offset;
1469
1470 if (buf) {
1471 memset(buf, 0, sgl->length);
1472 kunmap(sg_page(sgl));
1473 }
1474 }
1475
a026757f
NB		 1476 rc = transport_generic_map_mem_to_cmd(se_cmd, sgl, sgl_count,
1477 sgl_bidi, sgl_bidi_count);
1478 if (rc != 0) {
de103c93 1479 transport_generic_request_failure(se_cmd, rc);
a026757f
NB		 1480 return 0;
1481 }
1482 }
def2b339 1483
11e319ed
AG		 1484 /*
1485 * Check if we need to delay processing because of ALUA
1486 * Active/NonOptimized primary access state..
1487 */
1488 core_alua_check_nonop_delay(se_cmd);
1489
a6360785 1490 transport_handle_cdb_direct(se_cmd);
d6dfc868 1491 return 0;
a6360785 1492}
a026757f
NB		 1493EXPORT_SYMBOL(target_submit_cmd_map_sgls);
1494
1495/*
1496 * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd
1497 *
1498 * @se_cmd: command descriptor to submit
1499 * @se_sess: associated se_sess for endpoint
1500 * @cdb: pointer to SCSI CDB
1501 * @sense: pointer to SCSI sense buffer
1502 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1503 * @data_length: fabric expected data transfer length
1504 * @task_addr: SAM task attribute
1505 * @data_dir: DMA data direction
1506 * @flags: flags for command submission from target_sc_flags_tables
1507 *
1508 * Returns non zero to signal active I/O shutdown failure. All other
1509 * setup exceptions will be returned as a SCSI CHECK_CONDITION response,
1510 * but still return zero here.
1511 *
1512 * This may only be called from process context, and also currently
1513 * assumes internal allocation of fabric payload buffer by target-core.
1514 *
1515 * It also assumes interal target core SGL memory allocation.
1516 */
1517int target_submit_cmd(struct se_cmd *se_cmd, struct se_session *se_sess,
1518 unsigned char *cdb, unsigned char *sense, u32 unpacked_lun,
1519 u32 data_length, int task_attr, int data_dir, int flags)
1520{
1521 return target_submit_cmd_map_sgls(se_cmd, se_sess, cdb, sense,
1522 unpacked_lun, data_length, task_attr, data_dir,
def2b339 1523 flags, NULL, 0, NULL, 0, NULL, 0);
a026757f 1524}
a6360785
NB		 1525EXPORT_SYMBOL(target_submit_cmd);
1526
9f0d05c2
NB		 1527static void target_complete_tmr_failure(struct work_struct *work)
1528{
1529 struct se_cmd *se_cmd = container_of(work, struct se_cmd, work);
1530
1531 se_cmd->se_tmr_req->response = TMR_LUN_DOES_NOT_EXIST;
1532 se_cmd->se_tfo->queue_tm_rsp(se_cmd);
5a3b6fc0
RD		 1533
1534 transport_cmd_check_stop_to_fabric(se_cmd);
9f0d05c2
NB		 1535}
1536
ea98d7f9
AG		 1537/**
1538 * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
1539 * for TMR CDBs
1540 *
1541 * @se_cmd: command descriptor to submit
1542 * @se_sess: associated se_sess for endpoint
1543 * @sense: pointer to SCSI sense buffer
1544 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1545 * @fabric_context: fabric context for TMR req
1546 * @tm_type: Type of TM request
c0974f89
NB		 1547 * @gfp: gfp type for caller
1548 * @tag: referenced task tag for TMR_ABORT_TASK
c7042cae 1549 * @flags: submit cmd flags
ea98d7f9
AG		 1550 *
1551 * Callable from all contexts.
1552 **/
1553
c7042cae 1554int target_submit_tmr(struct se_cmd *se_cmd, struct se_session *se_sess,
ea98d7f9 1555 unsigned char *sense, u32 unpacked_lun,
c0974f89
NB		 1556 void *fabric_tmr_ptr, unsigned char tm_type,
1557 gfp_t gfp, unsigned int tag, int flags)
ea98d7f9
AG		 1558{
1559 struct se_portal_group *se_tpg;
1560 int ret;
1561
1562 se_tpg = se_sess->se_tpg;
1563 BUG_ON(!se_tpg);
1564
1565 transport_init_se_cmd(se_cmd, se_tpg->se_tpg_tfo, se_sess,
68d81f40 1566 0, DMA_NONE, TCM_SIMPLE_TAG, sense);
c7042cae
NB		 1567 /*
1568 * FIXME: Currently expect caller to handle se_cmd->se_tmr_req
1569 * allocation failure.
1570 */
c0974f89 1571 ret = core_tmr_alloc_req(se_cmd, fabric_tmr_ptr, tm_type, gfp);
c7042cae
NB		 1572 if (ret < 0)
1573 return -ENOMEM;
ea98d7f9 1574
c0974f89
NB		 1575 if (tm_type == TMR_ABORT_TASK)
1576 se_cmd->se_tmr_req->ref_task_tag = tag;
1577
ea98d7f9 1578 /* See target_submit_cmd for commentary */
bc187ea6
RD		 1579 ret = target_get_sess_cmd(se_sess, se_cmd, (flags & TARGET_SCF_ACK_KREF));
1580 if (ret) {
1581 core_tmr_release_req(se_cmd->se_tmr_req);
1582 return ret;
1583 }
ea98d7f9 1584
ea98d7f9
AG		 1585 ret = transport_lookup_tmr_lun(se_cmd, unpacked_lun);
1586 if (ret) {
9f0d05c2
NB		 1587 /*
1588 * For callback during failure handling, push this work off
1589 * to process context with TMR_LUN_DOES_NOT_EXIST status.
1590 */
1591 INIT_WORK(&se_cmd->work, target_complete_tmr_failure);
1592 schedule_work(&se_cmd->work);
c7042cae 1593 return 0;
ea98d7f9
AG		 1594 }
1595 transport_generic_handle_tmr(se_cmd);
c7042cae 1596 return 0;
ea98d7f9
AG		 1597}
1598EXPORT_SYMBOL(target_submit_tmr);
1599
cdbb70bb 1600/*
cf572a96 1601 * If the cmd is active, request it to be stopped and sleep until it
cdbb70bb
CH		 1602 * has completed.
1603 */
cf572a96 1604bool target_stop_cmd(struct se_cmd *cmd, unsigned long *flags)
cdbb70bb 1605{
cdbb70bb
CH		 1606 bool was_active = false;
1607
cf572a96
CH		 1608 if (cmd->transport_state & CMD_T_BUSY) {
1609 cmd->transport_state |= CMD_T_REQUEST_STOP;
cdbb70bb
CH		 1610 spin_unlock_irqrestore(&cmd->t_state_lock, *flags);
1611
cf572a96
CH		 1612 pr_debug("cmd %p waiting to complete\n", cmd);
1613 wait_for_completion(&cmd->task_stop_comp);
1614 pr_debug("cmd %p stopped successfully\n", cmd);
cdbb70bb
CH		 1615
1616 spin_lock_irqsave(&cmd->t_state_lock, *flags);
cf572a96
CH		 1617 cmd->transport_state &= ~CMD_T_REQUEST_STOP;
1618 cmd->transport_state &= ~CMD_T_BUSY;
cdbb70bb
CH		 1619 was_active = true;
1620 }
1621
cdbb70bb
CH		 1622 return was_active;
1623}
1624
c66ac9db
NB		 1625/*
1626 * Handle SAM-esque emulation for generic transport request failures.
1627 */
de103c93
CH		 1628void transport_generic_request_failure(struct se_cmd *cmd,
1629 sense_reason_t sense_reason)
c66ac9db 1630{
07bde79a
NB		 1631 int ret = 0;
1632
6708bb27 1633 pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
e3d6f909 1634 " CDB: 0x%02x\n", cmd, cmd->se_tfo->get_task_tag(cmd),
a1d8b49a 1635 cmd->t_task_cdb[0]);
de103c93 1636 pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n",
e3d6f909 1637 cmd->se_tfo->get_cmd_state(cmd),
de103c93 1638 cmd->t_state, sense_reason);
d43d6aea 1639 pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n",
7d680f3b
CH		 1640 (cmd->transport_state & CMD_T_ACTIVE) != 0,
1641 (cmd->transport_state & CMD_T_STOP) != 0,
1642 (cmd->transport_state & CMD_T_SENT) != 0);
c66ac9db 1643
c66ac9db
NB		 1644 /*
1645 * For SAM Task Attribute emulation for failed struct se_cmd
1646 */
019c4ca6 1647 transport_complete_task_attr(cmd);
cf6d1f09
NB		 1648 /*
1649 * Handle special case for COMPARE_AND_WRITE failure, where the
1650 * callback is expected to drop the per device ->caw_mutex.
1651 */
1652 if ((cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE) &&
1653 cmd->transport_complete_callback)
1654 cmd->transport_complete_callback(cmd);
c66ac9db 1655
de103c93 1656 switch (sense_reason) {
03e98c9e
NB		 1657 case TCM_NON_EXISTENT_LUN:
1658 case TCM_UNSUPPORTED_SCSI_OPCODE:
1659 case TCM_INVALID_CDB_FIELD:
1660 case TCM_INVALID_PARAMETER_LIST:
bb992e72 1661 case TCM_PARAMETER_LIST_LENGTH_ERROR:
03e98c9e
NB		 1662 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
1663 case TCM_UNKNOWN_MODE_PAGE:
1664 case TCM_WRITE_PROTECTED:
e2397c70 1665 case TCM_ADDRESS_OUT_OF_RANGE:
03e98c9e
NB		 1666 case TCM_CHECK_CONDITION_ABORT_CMD:
1667 case TCM_CHECK_CONDITION_UNIT_ATTENTION:
1668 case TCM_CHECK_CONDITION_NOT_READY:
94387aa7
NB		 1669 case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED:
1670 case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED:
1671 case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED:
c66ac9db 1672 break;
de103c93
CH		 1673 case TCM_OUT_OF_RESOURCES:
1674 sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1675 break;
03e98c9e 1676 case TCM_RESERVATION_CONFLICT:
c66ac9db
NB		 1677 /*
1678 * No SENSE Data payload for this case, set SCSI Status
1679 * and queue the response to $FABRIC_MOD.
1680 *
1681 * Uses linux/include/scsi/scsi.h SAM status codes defs
1682 */
1683 cmd->scsi_status = SAM_STAT_RESERVATION_CONFLICT;
1684 /*
1685 * For UA Interlock Code 11b, a RESERVATION CONFLICT will
1686 * establish a UNIT ATTENTION with PREVIOUS RESERVATION
1687 * CONFLICT STATUS.
1688 *
1689 * See spc4r17, section 7.4.6 Control Mode Page, Table 349
1690 */
e3d6f909 1691 if (cmd->se_sess &&
0fd97ccf 1692 cmd->se_dev->dev_attrib.emulate_ua_intlck_ctrl == 2)
e3d6f909 1693 core_scsi3_ua_allocate(cmd->se_sess->se_node_acl,
c66ac9db
NB		 1694 cmd->orig_fe_lun, 0x2C,
1695 ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS);
1696
e5c0d6ad
RD		 1697 trace_target_cmd_complete(cmd);
1698 ret = cmd->se_tfo-> queue_status(cmd);
f147abb4 1699 if (ret == -EAGAIN || ret == -ENOMEM)
07bde79a 1700 goto queue_full;
c66ac9db 1701 goto check_stop;
c66ac9db 1702 default:
6708bb27 1703 pr_err("Unknown transport error for CDB 0x%02x: %d\n",
de103c93
CH		 1704 cmd->t_task_cdb[0], sense_reason);
1705 sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
c66ac9db
NB		 1706 break;
1707 }
f3146437 1708
de103c93 1709 ret = transport_send_check_condition_and_sense(cmd, sense_reason, 0);
03e98c9e
NB		 1710 if (ret == -EAGAIN || ret == -ENOMEM)
1711 goto queue_full;
07bde79a 1712
c66ac9db
NB		 1713check_stop:
1714 transport_lun_remove_cmd(cmd);
6708bb27 1715 if (!transport_cmd_check_stop_to_fabric(cmd))
c66ac9db 1716 ;
07bde79a
NB		 1717 return;
1718
1719queue_full:
e057f533
CH		 1720 cmd->t_state = TRANSPORT_COMPLETE_QF_OK;
1721 transport_handle_queue_full(cmd, cmd->se_dev);
c66ac9db 1722}
2fbff127 1723EXPORT_SYMBOL(transport_generic_request_failure);
c66ac9db 1724
76dde50e 1725void __target_execute_cmd(struct se_cmd *cmd)
c66ac9db 1726{
de103c93 1727 sense_reason_t ret;
5f41a31d 1728
de103c93
CH		 1729 if (cmd->execute_cmd) {
1730 ret = cmd->execute_cmd(cmd);
1731 if (ret) {
1732 spin_lock_irq(&cmd->t_state_lock);
1733 cmd->transport_state &= ~(CMD_T_BUSY|CMD_T_SENT);
1734 spin_unlock_irq(&cmd->t_state_lock);
5f41a31d 1735
de103c93
CH		 1736 transport_generic_request_failure(cmd, ret);
1737 }
5f41a31d
CH		 1738 }
1739}
1740
aa58b531
NB		 1741static int target_write_prot_action(struct se_cmd *cmd)
1742{
5132d1e6 1743 u32 sectors;
aa58b531
NB		 1744 /*
1745 * Perform WRITE_INSERT of PI using software emulation when backend
1746 * device has PI enabled, if the transport has not already generated
1747 * PI using hardware WRITE_INSERT offload.
1748 */
1749 switch (cmd->prot_op) {
1750 case TARGET_PROT_DOUT_INSERT:
1751 if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_INSERT))
1752 sbc_dif_generate(cmd);
1753 break;
5132d1e6
NB		 1754 case TARGET_PROT_DOUT_STRIP:
1755 if (cmd->se_sess->sup_prot_ops & TARGET_PROT_DOUT_STRIP)
1756 break;
1757
1758 sectors = cmd->data_length >> ilog2(cmd->se_dev->dev_attrib.block_size);
1759 cmd->pi_err = sbc_dif_verify_write(cmd, cmd->t_task_lba,
1760 sectors, 0, NULL, 0);
1761 if (unlikely(cmd->pi_err)) {
1762 spin_lock_irq(&cmd->t_state_lock);
1763 cmd->transport_state &= ~CMD_T_BUSY|CMD_T_SENT;
1764 spin_unlock_irq(&cmd->t_state_lock);
1765 transport_generic_request_failure(cmd, cmd->pi_err);
1766 return -1;
1767 }
1768 break;
aa58b531
NB		 1769 default:
1770 break;
1771 }
1772
1773 return 0;
1774}
1775
019c4ca6 1776static bool target_handle_task_attr(struct se_cmd *cmd)
5f41a31d
CH		 1777{
1778 struct se_device *dev = cmd->se_dev;
1779
019c4ca6
CH		 1780 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1781 return false;
5f41a31d 1782
c66ac9db 1783 /*
25985edc 1784 * Check for the existence of HEAD_OF_QUEUE, and if true return 1
c66ac9db
NB		 1785 * to allow the passed struct se_cmd list of tasks to the front of the list.
1786 */
5f41a31d 1787 switch (cmd->sam_task_attr) {
68d81f40 1788 case TCM_HEAD_TAG:
5f41a31d
CH		 1789 pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, "
1790 "se_ordered_id: %u\n",
1791 cmd->t_task_cdb[0], cmd->se_ordered_id);
019c4ca6 1792 return false;
68d81f40 1793 case TCM_ORDERED_TAG:
33940d09 1794 atomic_inc_mb(&dev->dev_ordered_sync);
c66ac9db 1795
5f41a31d
CH		 1796 pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, "
1797 " se_ordered_id: %u\n",
1798 cmd->t_task_cdb[0], cmd->se_ordered_id);
1799
c66ac9db 1800 /*
5f41a31d
CH		 1801 * Execute an ORDERED command if no other older commands
1802 * exist that need to be completed first.
c66ac9db 1803 */
5f41a31d 1804 if (!atomic_read(&dev->simple_cmds))
019c4ca6 1805 return false;
5f41a31d
CH		 1806 break;
1807 default:
c66ac9db
NB		 1808 /*
1809 * For SIMPLE and UNTAGGED Task Attribute commands
1810 */
33940d09 1811 atomic_inc_mb(&dev->simple_cmds);
5f41a31d 1812 break;
c66ac9db 1813 }
5f41a31d 1814
019c4ca6
CH		 1815 if (atomic_read(&dev->dev_ordered_sync) == 0)
1816 return false;
c66ac9db 1817
019c4ca6
CH		 1818 spin_lock(&dev->delayed_cmd_lock);
1819 list_add_tail(&cmd->se_delayed_node, &dev->delayed_cmd_list);
1820 spin_unlock(&dev->delayed_cmd_lock);
1821
1822 pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to"
1823 " delayed CMD list, se_ordered_id: %u\n",
1824 cmd->t_task_cdb[0], cmd->sam_task_attr,
1825 cmd->se_ordered_id);
1826 return true;
1827}
1828
1829void target_execute_cmd(struct se_cmd *cmd)
1830{
1831 /*
1832 * If the received CDB has aleady been aborted stop processing it here.
1833 */
4a9a6c8d 1834 if (transport_check_aborted_status(cmd, 1))
5f41a31d 1835 return;
c66ac9db 1836
019c4ca6
CH		 1837 /*
1838 * Determine if frontend context caller is requesting the stopping of
1839 * this command for frontend exceptions.
1840 */
4a9a6c8d 1841 spin_lock_irq(&cmd->t_state_lock);
019c4ca6
CH		 1842 if (cmd->transport_state & CMD_T_STOP) {
1843 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
1844 __func__, __LINE__,
1845 cmd->se_tfo->get_task_tag(cmd));
1846
1847 spin_unlock_irq(&cmd->t_state_lock);
a95d6511 1848 complete_all(&cmd->t_transport_stop_comp);
019c4ca6
CH		 1849 return;
1850 }
1851
1852 cmd->t_state = TRANSPORT_PROCESSING;
1a398b97 1853 cmd->transport_state |= CMD_T_ACTIVE|CMD_T_BUSY|CMD_T_SENT;
019c4ca6 1854 spin_unlock_irq(&cmd->t_state_lock);
aa58b531
NB		 1855
1856 if (target_write_prot_action(cmd))
1857 return;
019c4ca6 1858
1a398b97
NB		 1859 if (target_handle_task_attr(cmd)) {
1860 spin_lock_irq(&cmd->t_state_lock);
1861 cmd->transport_state &= ~CMD_T_BUSY|CMD_T_SENT;
1862 spin_unlock_irq(&cmd->t_state_lock);
1863 return;
1864 }
1865
1866 __target_execute_cmd(cmd);
c66ac9db 1867}
70baf0ab 1868EXPORT_SYMBOL(target_execute_cmd);
c66ac9db 1869
5f41a31d
CH		 1870/*
1871 * Process all commands up to the last received ORDERED task attribute which
1872 * requires another blocking boundary
1873 */
1874static void target_restart_delayed_cmds(struct se_device *dev)
1875{
1876 for (;;) {
1877 struct se_cmd *cmd;
1878
1879 spin_lock(&dev->delayed_cmd_lock);
1880 if (list_empty(&dev->delayed_cmd_list)) {
1881 spin_unlock(&dev->delayed_cmd_lock);
1882 break;
1883 }
1884
1885 cmd = list_entry(dev->delayed_cmd_list.next,
1886 struct se_cmd, se_delayed_node);
1887 list_del(&cmd->se_delayed_node);
1888 spin_unlock(&dev->delayed_cmd_lock);
1889
1890 __target_execute_cmd(cmd);
1891
68d81f40 1892 if (cmd->sam_task_attr == TCM_ORDERED_TAG)
5f41a31d
CH		 1893 break;
1894 }
1895}
1896
c66ac9db 1897/*
35e0e757 1898 * Called from I/O completion to determine which dormant/delayed
c66ac9db
NB		 1899 * and ordered cmds need to have their tasks added to the execution queue.
1900 */
1901static void transport_complete_task_attr(struct se_cmd *cmd)
1902{
5951146d 1903 struct se_device *dev = cmd->se_dev;
c66ac9db 1904
019c4ca6
CH		 1905 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1906 return;
1907
68d81f40 1908 if (cmd->sam_task_attr == TCM_SIMPLE_TAG) {
33940d09 1909 atomic_dec_mb(&dev->simple_cmds);
c66ac9db 1910 dev->dev_cur_ordered_id++;
6708bb27 1911 pr_debug("Incremented dev->dev_cur_ordered_id: %u for"
c66ac9db
NB		 1912 " SIMPLE: %u\n", dev->dev_cur_ordered_id,
1913 cmd->se_ordered_id);
68d81f40 1914 } else if (cmd->sam_task_attr == TCM_HEAD_TAG) {
c66ac9db 1915 dev->dev_cur_ordered_id++;
6708bb27 1916 pr_debug("Incremented dev_cur_ordered_id: %u for"
c66ac9db
NB		 1917 " HEAD_OF_QUEUE: %u\n", dev->dev_cur_ordered_id,
1918 cmd->se_ordered_id);
68d81f40 1919 } else if (cmd->sam_task_attr == TCM_ORDERED_TAG) {
33940d09 1920 atomic_dec_mb(&dev->dev_ordered_sync);
c66ac9db
NB		 1921
1922 dev->dev_cur_ordered_id++;
6708bb27 1923 pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:"
c66ac9db
NB		 1924 " %u\n", dev->dev_cur_ordered_id, cmd->se_ordered_id);
1925 }
c66ac9db 1926
5f41a31d 1927 target_restart_delayed_cmds(dev);
c66ac9db
NB		 1928}
1929
e057f533 1930static void transport_complete_qf(struct se_cmd *cmd)
07bde79a
NB		 1931{
1932 int ret = 0;
1933
019c4ca6 1934 transport_complete_task_attr(cmd);
e057f533
CH		 1935
1936 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
e5c0d6ad 1937 trace_target_cmd_complete(cmd);
e057f533 1938 ret = cmd->se_tfo->queue_status(cmd);
082f58ac 1939 goto out;
e057f533 1940 }
07bde79a
NB		 1941
1942 switch (cmd->data_direction) {
1943 case DMA_FROM_DEVICE:
e5c0d6ad 1944 trace_target_cmd_complete(cmd);
07bde79a
NB		 1945 ret = cmd->se_tfo->queue_data_in(cmd);
1946 break;
1947 case DMA_TO_DEVICE:
64577407 1948 if (cmd->se_cmd_flags & SCF_BIDI) {
07bde79a
NB		 1949 ret = cmd->se_tfo->queue_data_in(cmd);
1950 if (ret < 0)
e057f533 1951 break;
07bde79a
NB		 1952 }
1953 /* Fall through for DMA_TO_DEVICE */
1954 case DMA_NONE:
e5c0d6ad 1955 trace_target_cmd_complete(cmd);
07bde79a
NB		 1956 ret = cmd->se_tfo->queue_status(cmd);
1957 break;
1958 default:
1959 break;
1960 }
1961
e057f533
CH		 1962out:
1963 if (ret < 0) {
1964 transport_handle_queue_full(cmd, cmd->se_dev);
1965 return;
1966 }
1967 transport_lun_remove_cmd(cmd);
1968 transport_cmd_check_stop_to_fabric(cmd);
07bde79a
NB		 1969}
1970
1971static void transport_handle_queue_full(
1972 struct se_cmd *cmd,
e057f533 1973 struct se_device *dev)
07bde79a
NB		 1974{
1975 spin_lock_irq(&dev->qf_cmd_lock);
07bde79a 1976 list_add_tail(&cmd->se_qf_node, &cmd->se_dev->qf_cmd_list);
33940d09 1977 atomic_inc_mb(&dev->dev_qf_count);
07bde79a
NB		 1978 spin_unlock_irq(&cmd->se_dev->qf_cmd_lock);
1979
1980 schedule_work(&cmd->se_dev->qf_work_queue);
1981}
1982
bc005869
NB		 1983static bool target_check_read_strip(struct se_cmd *cmd)
1984{
1985 sense_reason_t rc;
1986
1987 if (!(cmd->se_sess->sup_prot_ops & TARGET_PROT_DIN_STRIP)) {
1988 rc = sbc_dif_read_strip(cmd);
1989 if (rc) {
1990 cmd->pi_err = rc;
1991 return true;
1992 }
1993 }
1994
1995 return false;
1996}
1997
35e0e757 1998static void target_complete_ok_work(struct work_struct *work)
c66ac9db 1999{
35e0e757 2000 struct se_cmd *cmd = container_of(work, struct se_cmd, work);
27a27099 2001 int ret;
35e0e757 2002
c66ac9db
NB		 2003 /*
2004 * Check if we need to move delayed/dormant tasks from cmds on the
2005 * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task
2006 * Attribute.
2007 */
019c4ca6
CH		 2008 transport_complete_task_attr(cmd);
2009
07bde79a
NB		 2010 /*
2011 * Check to schedule QUEUE_FULL work, or execute an existing
2012 * cmd->transport_qf_callback()
2013 */
2014 if (atomic_read(&cmd->se_dev->dev_qf_count) != 0)
2015 schedule_work(&cmd->se_dev->qf_work_queue);
2016
c66ac9db 2017 /*
d5829eac 2018 * Check if we need to send a sense buffer from
c66ac9db
NB		 2019 * the struct se_cmd in question.
2020 */
2021 if (cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) {
27a27099 2022 WARN_ON(!cmd->scsi_status);
27a27099
PB		 2023 ret = transport_send_check_condition_and_sense(
2024 cmd, 0, 1);
2025 if (ret == -EAGAIN || ret == -ENOMEM)
2026 goto queue_full;
2027
2028 transport_lun_remove_cmd(cmd);
2029 transport_cmd_check_stop_to_fabric(cmd);
2030 return;
c66ac9db
NB		 2031 }
2032 /*
25985edc 2033 * Check for a callback, used by amongst other things
a6b0133c 2034 * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation.
c66ac9db 2035 */
a6b0133c
NB		 2036 if (cmd->transport_complete_callback) {
2037 sense_reason_t rc;
2038
2039 rc = cmd->transport_complete_callback(cmd);
a2890087 2040 if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST)) {
a6b0133c 2041 return;
a2890087
NB		 2042 } else if (rc) {
2043 ret = transport_send_check_condition_and_sense(cmd,
2044 rc, 0);
2045 if (ret == -EAGAIN || ret == -ENOMEM)
2046 goto queue_full;
a6b0133c 2047
a2890087
NB		 2048 transport_lun_remove_cmd(cmd);
2049 transport_cmd_check_stop_to_fabric(cmd);
2050 return;
2051 }
a6b0133c 2052 }
c66ac9db
NB		 2053
2054 switch (cmd->data_direction) {
2055 case DMA_FROM_DEVICE:
2056 spin_lock(&cmd->se_lun->lun_sep_lock);
e3d6f909
AG		 2057 if (cmd->se_lun->lun_sep) {
2058 cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
c66ac9db
NB		 2059 cmd->data_length;
2060 }
2061 spin_unlock(&cmd->se_lun->lun_sep_lock);
bc005869
NB		 2062 /*
2063 * Perform READ_STRIP of PI using software emulation when
2064 * backend had PI enabled, if the transport will not be
2065 * performing hardware READ_STRIP offload.
2066 */
2067 if (cmd->prot_op == TARGET_PROT_DIN_STRIP &&
2068 target_check_read_strip(cmd)) {
2069 ret = transport_send_check_condition_and_sense(cmd,
2070 cmd->pi_err, 0);
2071 if (ret == -EAGAIN || ret == -ENOMEM)
2072 goto queue_full;
2073
2074 transport_lun_remove_cmd(cmd);
2075 transport_cmd_check_stop_to_fabric(cmd);
2076 return;
2077 }
c66ac9db 2078
e5c0d6ad 2079 trace_target_cmd_complete(cmd);
07bde79a 2080 ret = cmd->se_tfo->queue_data_in(cmd);
f147abb4 2081 if (ret == -EAGAIN || ret == -ENOMEM)
07bde79a 2082 goto queue_full;
c66ac9db
NB		 2083 break;
2084 case DMA_TO_DEVICE:
2085 spin_lock(&cmd->se_lun->lun_sep_lock);
e3d6f909
AG		 2086 if (cmd->se_lun->lun_sep) {
2087 cmd->se_lun->lun_sep->sep_stats.rx_data_octets +=
c66ac9db
NB		 2088 cmd->data_length;
2089 }
2090 spin_unlock(&cmd->se_lun->lun_sep_lock);
2091 /*
2092 * Check if we need to send READ payload for BIDI-COMMAND
2093 */
64577407 2094 if (cmd->se_cmd_flags & SCF_BIDI) {
c66ac9db 2095 spin_lock(&cmd->se_lun->lun_sep_lock);
e3d6f909
AG		 2096 if (cmd->se_lun->lun_sep) {
2097 cmd->se_lun->lun_sep->sep_stats.tx_data_octets +=
c66ac9db
NB		 2098 cmd->data_length;
2099 }
2100 spin_unlock(&cmd->se_lun->lun_sep_lock);
07bde79a 2101 ret = cmd->se_tfo->queue_data_in(cmd);
f147abb4 2102 if (ret == -EAGAIN || ret == -ENOMEM)
07bde79a 2103 goto queue_full;
c66ac9db
NB		 2104 break;
2105 }
2106 /* Fall through for DMA_TO_DEVICE */
2107 case DMA_NONE:
e5c0d6ad 2108 trace_target_cmd_complete(cmd);
07bde79a 2109 ret = cmd->se_tfo->queue_status(cmd);
f147abb4 2110 if (ret == -EAGAIN || ret == -ENOMEM)
07bde79a 2111 goto queue_full;
c66ac9db
NB		 2112 break;
2113 default:
2114 break;
2115 }
2116
2117 transport_lun_remove_cmd(cmd);
2118 transport_cmd_check_stop_to_fabric(cmd);
07bde79a
NB		 2119 return;
2120
2121queue_full:
6708bb27 2122 pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p,"
07bde79a 2123 " data_direction: %d\n", cmd, cmd->data_direction);
e057f533
CH		 2124 cmd->t_state = TRANSPORT_COMPLETE_QF_OK;
2125 transport_handle_queue_full(cmd, cmd->se_dev);
c66ac9db
NB		 2126}
2127
6708bb27 2128static inline void transport_free_sgl(struct scatterlist *sgl, int nents)
c66ac9db 2129{
ec98f782 2130 struct scatterlist *sg;
ec98f782 2131 int count;
c66ac9db 2132
6708bb27
AG		 2133 for_each_sg(sgl, sg, nents, count)
2134 __free_page(sg_page(sg));
c66ac9db 2135
6708bb27
AG		 2136 kfree(sgl);
2137}
c66ac9db 2138
47e459e6
NB		 2139static inline void transport_reset_sgl_orig(struct se_cmd *cmd)
2140{
2141 /*
2142 * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE
2143 * emulation, and free + reset pointers if necessary..
2144 */
2145 if (!cmd->t_data_sg_orig)
2146 return;
2147
2148 kfree(cmd->t_data_sg);
2149 cmd->t_data_sg = cmd->t_data_sg_orig;
2150 cmd->t_data_sg_orig = NULL;
2151 cmd->t_data_nents = cmd->t_data_nents_orig;
2152 cmd->t_data_nents_orig = 0;
2153}
2154
6708bb27
AG		 2155static inline void transport_free_pages(struct se_cmd *cmd)
2156{
47e459e6
NB		 2157 if (cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) {
2158 transport_reset_sgl_orig(cmd);
6708bb27 2159 return;
47e459e6
NB		 2160 }
2161 transport_reset_sgl_orig(cmd);
6708bb27
AG		 2162
2163 transport_free_sgl(cmd->t_data_sg, cmd->t_data_nents);
ec98f782
AG		 2164 cmd->t_data_sg = NULL;
2165 cmd->t_data_nents = 0;
c66ac9db 2166
6708bb27 2167 transport_free_sgl(cmd->t_bidi_data_sg, cmd->t_bidi_data_nents);
ec98f782
AG		 2168 cmd->t_bidi_data_sg = NULL;
2169 cmd->t_bidi_data_nents = 0;
acb2bde3
SG		 2170
2171 transport_free_sgl(cmd->t_prot_sg, cmd->t_prot_nents);
2172 cmd->t_prot_sg = NULL;
2173 cmd->t_prot_nents = 0;
c66ac9db
NB		 2174}
2175
e26d99ae
CH		 2176/**
2177 * transport_release_cmd - free a command
2178 * @cmd: command to free
2179 *
2180 * This routine unconditionally frees a command, and reference counting
2181 * or list removal must be done in the caller.
2182 */
d5ddad41 2183static int transport_release_cmd(struct se_cmd *cmd)
e26d99ae
CH		 2184{
2185 BUG_ON(!cmd->se_tfo);
2186
c8e31f26 2187 if (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
e26d99ae
CH		 2188 core_tmr_release_req(cmd->se_tmr_req);
2189 if (cmd->t_task_cdb != cmd->__t_task_cdb)
2190 kfree(cmd->t_task_cdb);
2191 /*
7481deb4
NB		 2192 * If this cmd has been setup with target_get_sess_cmd(), drop
2193 * the kref and call ->release_cmd() in kref callback.
e26d99ae 2194 */
ca24976a 2195 return target_put_sess_cmd(cmd->se_sess, cmd);
e26d99ae
CH		 2196}
2197
d3df7825
CH		 2198/**
2199 * transport_put_cmd - release a reference to a command
2200 * @cmd: command to release
2201 *
2202 * This routine releases our reference to the command and frees it if possible.
2203 */
d5ddad41 2204static int transport_put_cmd(struct se_cmd *cmd)
c66ac9db 2205{
c66ac9db 2206 transport_free_pages(cmd);
d5ddad41 2207 return transport_release_cmd(cmd);
c66ac9db 2208}
c66ac9db 2209
4949314c 2210void *transport_kmap_data_sg(struct se_cmd *cmd)
05d1c7c0 2211{
ec98f782 2212 struct scatterlist *sg = cmd->t_data_sg;
4949314c
AG		 2213 struct page **pages;
2214 int i;
05d1c7c0
AG		 2215
2216 /*
ec98f782
AG		 2217 * We need to take into account a possible offset here for fabrics like
2218 * tcm_loop who may be using a contig buffer from the SCSI midlayer for
2219 * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd()
05d1c7c0 2220 */
4949314c
AG		 2221 if (!cmd->t_data_nents)
2222 return NULL;
3717ef0c
PB		 2223
2224 BUG_ON(!sg);
2225 if (cmd->t_data_nents == 1)
4949314c
AG		 2226 return kmap(sg_page(sg)) + sg->offset;
2227
2228 /* >1 page. use vmap */
2229 pages = kmalloc(sizeof(*pages) * cmd->t_data_nents, GFP_KERNEL);
de103c93 2230 if (!pages)
4949314c
AG		 2231 return NULL;
2232
2233 /* convert sg[] to pages[] */
2234 for_each_sg(cmd->t_data_sg, sg, cmd->t_data_nents, i) {
2235 pages[i] = sg_page(sg);
2236 }
2237
2238 cmd->t_data_vmap = vmap(pages, cmd->t_data_nents, VM_MAP, PAGE_KERNEL);
2239 kfree(pages);
de103c93 2240 if (!cmd->t_data_vmap)
4949314c
AG		 2241 return NULL;
2242
2243 return cmd->t_data_vmap + cmd->t_data_sg[0].offset;
05d1c7c0 2244}
4949314c 2245EXPORT_SYMBOL(transport_kmap_data_sg);
05d1c7c0 2246
4949314c 2247void transport_kunmap_data_sg(struct se_cmd *cmd)
05d1c7c0 2248{
a1edf9cf 2249 if (!cmd->t_data_nents) {
4949314c 2250 return;
a1edf9cf 2251 } else if (cmd->t_data_nents == 1) {
4949314c 2252 kunmap(sg_page(cmd->t_data_sg));
a1edf9cf
AG		 2253 return;
2254 }
4949314c
AG		 2255
2256 vunmap(cmd->t_data_vmap);
2257 cmd->t_data_vmap = NULL;
05d1c7c0 2258}
4949314c 2259EXPORT_SYMBOL(transport_kunmap_data_sg);
05d1c7c0 2260
c5ff8d6b 2261int
20093994
NB		 2262target_alloc_sgl(struct scatterlist **sgl, unsigned int *nents, u32 length,
2263 bool zero_page)
c66ac9db 2264{
20093994 2265 struct scatterlist *sg;
ec98f782 2266 struct page *page;
20093994
NB		 2267 gfp_t zero_flag = (zero_page) ? __GFP_ZERO : 0;
2268 unsigned int nent;
ec98f782 2269 int i = 0;
c66ac9db 2270
20093994
NB		 2271 nent = DIV_ROUND_UP(length, PAGE_SIZE);
2272 sg = kmalloc(sizeof(struct scatterlist) * nent, GFP_KERNEL);
2273 if (!sg)
ec98f782 2274 return -ENOMEM;
c66ac9db 2275
20093994 2276 sg_init_table(sg, nent);
9db9da33 2277
ec98f782
AG		 2278 while (length) {
2279 u32 page_len = min_t(u32, length, PAGE_SIZE);
9db9da33 2280 page = alloc_page(GFP_KERNEL | zero_flag);
ec98f782
AG		 2281 if (!page)
2282 goto out;
c66ac9db 2283
20093994 2284 sg_set_page(&sg[i], page, page_len, 0);
ec98f782
AG		 2285 length -= page_len;
2286 i++;
c66ac9db 2287 }
20093994
NB		 2288 *sgl = sg;
2289 *nents = nent;
c66ac9db 2290 return 0;
c66ac9db 2291
ec98f782 2292out:
d0e27c88 2293 while (i > 0) {
ec98f782 2294 i--;
20093994 2295 __free_page(sg_page(&sg[i]));
c66ac9db 2296 }
20093994 2297 kfree(sg);
ec98f782 2298 return -ENOMEM;
c66ac9db
NB		 2299}
2300
da0f7619 2301/*
b16a35b0
AG		 2302 * Allocate any required resources to execute the command. For writes we
2303 * might not have the payload yet, so notify the fabric via a call to
2304 * ->write_pending instead. Otherwise place it on the execution queue.
c66ac9db 2305 */
de103c93
CH		 2306sense_reason_t
2307transport_generic_new_cmd(struct se_cmd *cmd)
c66ac9db 2308{
c66ac9db
NB		 2309 int ret = 0;
2310
2311 /*
2312 * Determine is the TCM fabric module has already allocated physical
2313 * memory, and is directly calling transport_generic_map_mem_to_cmd()
ec98f782 2314 * beforehand.
c66ac9db 2315 */
ec98f782
AG		 2316 if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC) &&
2317 cmd->data_length) {
20093994
NB		 2318 bool zero_flag = !(cmd->se_cmd_flags & SCF_SCSI_DATA_CDB);
2319
8cefe07b
NB		 2320 if ((cmd->se_cmd_flags & SCF_BIDI) ||
2321 (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)) {
2322 u32 bidi_length;
2323
2324 if (cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE)
2325 bidi_length = cmd->t_task_nolb *
2326 cmd->se_dev->dev_attrib.block_size;
2327 else
2328 bidi_length = cmd->data_length;
2329
2330 ret = target_alloc_sgl(&cmd->t_bidi_data_sg,
2331 &cmd->t_bidi_data_nents,
2332 bidi_length, zero_flag);
2333 if (ret < 0)
2334 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2335 }
2336
19f9361a 2337 if (cmd->prot_op != TARGET_PROT_NORMAL) {
acb2bde3
SG		 2338 ret = target_alloc_sgl(&cmd->t_prot_sg,
2339 &cmd->t_prot_nents,
2340 cmd->prot_length, true);
2341 if (ret < 0)
2342 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2343 }
2344
20093994
NB		 2345 ret = target_alloc_sgl(&cmd->t_data_sg, &cmd->t_data_nents,
2346 cmd->data_length, zero_flag);
c66ac9db 2347 if (ret < 0)
de103c93 2348 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
c66ac9db 2349 }
c66ac9db 2350 /*
c3196f0c
CH		 2351 * If this command is not a write we can execute it right here,
2352 * for write buffers we need to notify the fabric driver first
2353 * and let it call back once the write buffers are ready.
c66ac9db 2354 */
5f41a31d 2355 target_add_to_state_list(cmd);
885e7b0e 2356 if (cmd->data_direction != DMA_TO_DEVICE || cmd->data_length == 0) {
c3196f0c
CH		 2357 target_execute_cmd(cmd);
2358 return 0;
2359 }
862e6389 2360 transport_cmd_check_stop(cmd, false, true);
c3196f0c
CH		 2361
2362 ret = cmd->se_tfo->write_pending(cmd);
2363 if (ret == -EAGAIN || ret == -ENOMEM)
2364 goto queue_full;
2365
de103c93
CH		 2366 /* fabric drivers should only return -EAGAIN or -ENOMEM as error */
2367 WARN_ON(ret);
2368
b69c1fcf 2369 return (!ret) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
da0f7619 2370
c3196f0c
CH		 2371queue_full:
2372 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd);
2373 cmd->t_state = TRANSPORT_COMPLETE_QF_WP;
2374 transport_handle_queue_full(cmd, cmd->se_dev);
2375 return 0;
c66ac9db 2376}
a1d8b49a 2377EXPORT_SYMBOL(transport_generic_new_cmd);
c66ac9db 2378
e057f533 2379static void transport_write_pending_qf(struct se_cmd *cmd)
07bde79a 2380{
f147abb4
NB		 2381 int ret;
2382
2383 ret = cmd->se_tfo->write_pending(cmd);
2384 if (ret == -EAGAIN || ret == -ENOMEM) {
e057f533
CH		 2385 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n",
2386 cmd);
2387 transport_handle_queue_full(cmd, cmd->se_dev);
2388 }
07bde79a
NB		 2389}
2390
d5ddad41 2391int transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
c66ac9db 2392{
c130480b 2393 unsigned long flags;
d5ddad41
NB		 2394 int ret = 0;
2395
d14921d6 2396 if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD)) {
c8e31f26 2397 if (wait_for_tasks && (cmd->se_cmd_flags & SCF_SCSI_TMR_CDB))
d14921d6
NB		 2398 transport_wait_for_tasks(cmd);
2399
d5ddad41 2400 ret = transport_release_cmd(cmd);
d14921d6
NB		 2401 } else {
2402 if (wait_for_tasks)
2403 transport_wait_for_tasks(cmd);
c130480b
NB		 2404 /*
2405 * Handle WRITE failure case where transport_generic_new_cmd()
2406 * has already added se_cmd to state_list, but fabric has
2407 * failed command before I/O submission.
2408 */
2409 if (cmd->state_active) {
2410 spin_lock_irqsave(&cmd->t_state_lock, flags);
2411 target_remove_from_state_list(cmd);
2412 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2413 }
d14921d6 2414
82f1c8a4 2415 if (cmd->se_lun)
c66ac9db 2416 transport_lun_remove_cmd(cmd);
c66ac9db 2417
d5ddad41 2418 ret = transport_put_cmd(cmd);
c66ac9db 2419 }
d5ddad41 2420 return ret;
c66ac9db
NB		 2421}
2422EXPORT_SYMBOL(transport_generic_free_cmd);
2423
a17f091d
NB		 2424/* target_get_sess_cmd - Add command to active ->sess_cmd_list
2425 * @se_sess: session to reference
2426 * @se_cmd: command descriptor to add
a6360785 2427 * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd()
a17f091d 2428 */
20361e69 2429int target_get_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd,
bc187ea6 2430 bool ack_kref)
a17f091d
NB		 2431{
2432 unsigned long flags;
bc187ea6 2433 int ret = 0;
a17f091d 2434
a6360785
NB		 2435 /*
2436 * Add a second kref if the fabric caller is expecting to handle
2437 * fabric acknowledgement that requires two target_put_sess_cmd()
2438 * invocations before se_cmd descriptor release.
2439 */
0bcc297e 2440 if (ack_kref) {
a6360785 2441 kref_get(&se_cmd->cmd_kref);
86715569
NB		 2442 se_cmd->se_cmd_flags |= SCF_ACK_KREF;
2443 }
7481deb4 2444
a17f091d 2445 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
bc187ea6
RD		 2446 if (se_sess->sess_tearing_down) {
2447 ret = -ESHUTDOWN;
2448 goto out;
2449 }
a17f091d 2450 list_add_tail(&se_cmd->se_cmd_list, &se_sess->sess_cmd_list);
bc187ea6 2451out:
a17f091d 2452 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
bc187ea6 2453 return ret;
a17f091d 2454}
20361e69 2455EXPORT_SYMBOL(target_get_sess_cmd);
a17f091d 2456
7481deb4 2457static void target_release_cmd_kref(struct kref *kref)
077aa3b2 2458 __releases(&se_cmd->se_sess->sess_cmd_lock)
a17f091d 2459{
7481deb4
NB		 2460 struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref);
2461 struct se_session *se_sess = se_cmd->se_sess;
a17f091d 2462
a17f091d 2463 if (list_empty(&se_cmd->se_cmd_list)) {
ccf5ae83 2464 spin_unlock(&se_sess->sess_cmd_lock);
ffc32d52 2465 se_cmd->se_tfo->release_cmd(se_cmd);
7481deb4 2466 return;
a17f091d 2467 }
a17f091d 2468 if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) {
ccf5ae83 2469 spin_unlock(&se_sess->sess_cmd_lock);
a17f091d 2470 complete(&se_cmd->cmd_wait_comp);
7481deb4 2471 return;
a17f091d
NB		 2472 }
2473 list_del(&se_cmd->se_cmd_list);
ccf5ae83 2474 spin_unlock(&se_sess->sess_cmd_lock);
a17f091d 2475
7481deb4
NB		 2476 se_cmd->se_tfo->release_cmd(se_cmd);
2477}
2478
2479/* target_put_sess_cmd - Check for active I/O shutdown via kref_put
2480 * @se_sess: session to reference
2481 * @se_cmd: command descriptor to drop
2482 */
2483int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd)
2484{
0ed6e189
NB		 2485 if (!se_sess) {
2486 se_cmd->se_tfo->release_cmd(se_cmd);
2487 return 1;
2488 }
ccf5ae83
JE		 2489 return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref,
2490 &se_sess->sess_cmd_lock);
a17f091d
NB		 2491}
2492EXPORT_SYMBOL(target_put_sess_cmd);
2493
1c7b13fe
RD		 2494/* target_sess_cmd_list_set_waiting - Flag all commands in
2495 * sess_cmd_list to complete cmd_wait_comp. Set
2496 * sess_tearing_down so no more commands are queued.
2497 * @se_sess: session to flag
a17f091d 2498 */
1c7b13fe 2499void target_sess_cmd_list_set_waiting(struct se_session *se_sess)
a17f091d
NB		 2500{
2501 struct se_cmd *se_cmd;
2502 unsigned long flags;
2503
a17f091d 2504 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
9b31a328
NB		 2505 if (se_sess->sess_tearing_down) {
2506 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2507 return;
2508 }
1c7b13fe 2509 se_sess->sess_tearing_down = 1;
9b31a328 2510 list_splice_init(&se_sess->sess_cmd_list, &se_sess->sess_wait_list);
a17f091d 2511
9b31a328 2512 list_for_each_entry(se_cmd, &se_sess->sess_wait_list, se_cmd_list)
a17f091d
NB		 2513 se_cmd->cmd_wait_set = 1;
2514
2515 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2516}
1c7b13fe 2517EXPORT_SYMBOL(target_sess_cmd_list_set_waiting);
a17f091d
NB		 2518
2519/* target_wait_for_sess_cmds - Wait for outstanding descriptors
2520 * @se_sess: session to wait for active I/O
a17f091d 2521 */
be646c2d 2522void target_wait_for_sess_cmds(struct se_session *se_sess)
a17f091d
NB		 2523{
2524 struct se_cmd *se_cmd, *tmp_cmd;
9b31a328 2525 unsigned long flags;
a17f091d
NB		 2526
2527 list_for_each_entry_safe(se_cmd, tmp_cmd,
9b31a328 2528 &se_sess->sess_wait_list, se_cmd_list) {
a17f091d
NB		 2529 list_del(&se_cmd->se_cmd_list);
2530
2531 pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
2532 " %d\n", se_cmd, se_cmd->t_state,
2533 se_cmd->se_tfo->get_cmd_state(se_cmd));
2534
be646c2d
JE		 2535 wait_for_completion(&se_cmd->cmd_wait_comp);
2536 pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d"
2537 " fabric state: %d\n", se_cmd, se_cmd->t_state,
2538 se_cmd->se_tfo->get_cmd_state(se_cmd));
a17f091d
NB		 2539
2540 se_cmd->se_tfo->release_cmd(se_cmd);
2541 }
9b31a328
NB		 2542
2543 spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
2544 WARN_ON(!list_empty(&se_sess->sess_cmd_list));
2545 spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
2546
a17f091d
NB		 2547}
2548EXPORT_SYMBOL(target_wait_for_sess_cmds);
2549
5277797d 2550static int transport_clear_lun_ref_thread(void *p)
c66ac9db 2551{
8359cf43 2552 struct se_lun *lun = p;
c66ac9db 2553
5277797d
NB		 2554 percpu_ref_kill(&lun->lun_ref);
2555
2556 wait_for_completion(&lun->lun_ref_comp);
c66ac9db
NB		 2557 complete(&lun->lun_shutdown_comp);
2558
2559 return 0;
2560}
2561
5277797d 2562int transport_clear_lun_ref(struct se_lun *lun)
c66ac9db
NB		 2563{
2564 struct task_struct *kt;
2565
5277797d 2566 kt = kthread_run(transport_clear_lun_ref_thread, lun,
c66ac9db
NB		 2567 "tcm_cl_%u", lun->unpacked_lun);
2568 if (IS_ERR(kt)) {
6708bb27 2569 pr_err("Unable to start clear_lun thread\n");
e3d6f909 2570 return PTR_ERR(kt);
c66ac9db
NB		 2571 }
2572 wait_for_completion(&lun->lun_shutdown_comp);
2573
2574 return 0;
2575}
2576
d14921d6
NB		 2577/**
2578 * transport_wait_for_tasks - wait for completion to occur
2579 * @cmd: command to wait
c66ac9db 2580 *
d14921d6
NB		 2581 * Called from frontend fabric context to wait for storage engine
2582 * to pause and/or release frontend generated struct se_cmd.
c66ac9db 2583 */
a17f091d 2584bool transport_wait_for_tasks(struct se_cmd *cmd)
c66ac9db
NB		 2585{
2586 unsigned long flags;
2587
a1d8b49a 2588 spin_lock_irqsave(&cmd->t_state_lock, flags);
c8e31f26
AG		 2589 if (!(cmd->se_cmd_flags & SCF_SE_LUN_CMD) &&
2590 !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
d14921d6 2591 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
a17f091d 2592 return false;
d14921d6 2593 }
cb4f4d3c 2594
c8e31f26
AG		 2595 if (!(cmd->se_cmd_flags & SCF_SUPPORTED_SAM_OPCODE) &&
2596 !(cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
d14921d6 2597 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
a17f091d 2598 return false;
d14921d6 2599 }
7d680f3b 2600
3d28934a 2601 if (!(cmd->transport_state & CMD_T_ACTIVE)) {
d14921d6 2602 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
a17f091d 2603 return false;
d14921d6 2604 }
c66ac9db 2605
7d680f3b 2606 cmd->transport_state |= CMD_T_STOP;
c66ac9db 2607
6708bb27 2608 pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x"
7d680f3b 2609 " i_state: %d, t_state: %d, CMD_T_STOP\n",
f2da9dbd
CH		 2610 cmd, cmd->se_tfo->get_task_tag(cmd),
2611 cmd->se_tfo->get_cmd_state(cmd), cmd->t_state);
c66ac9db 2612
a1d8b49a 2613 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
c66ac9db 2614
a1d8b49a 2615 wait_for_completion(&cmd->t_transport_stop_comp);
c66ac9db 2616
a1d8b49a 2617 spin_lock_irqsave(&cmd->t_state_lock, flags);
7d680f3b 2618 cmd->transport_state &= ~(CMD_T_ACTIVE | CMD_T_STOP);
c66ac9db 2619
35d1efe8 2620 pr_debug("wait_for_tasks: Stopped wait_for_completion("
a1d8b49a 2621 "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n",
e3d6f909 2622 cmd->se_tfo->get_task_tag(cmd));
c66ac9db 2623
d14921d6 2624 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
a17f091d
NB		 2625
2626 return true;
c66ac9db 2627}
d14921d6 2628EXPORT_SYMBOL(transport_wait_for_tasks);
c66ac9db
NB		 2629
2630static int transport_get_sense_codes(
2631 struct se_cmd *cmd,
2632 u8 *asc,
2633 u8 *ascq)
2634{
2635 *asc = cmd->scsi_asc;
2636 *ascq = cmd->scsi_ascq;
2637
2638 return 0;
2639}
2640
76736db3
SG		 2641static
2642void transport_err_sector_info(unsigned char *buffer, sector_t bad_sector)
2643{
2644 /* Place failed LBA in sense data information descriptor 0. */
2645 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 0xc;
2646 buffer[SPC_DESC_TYPE_OFFSET] = 0; /* Information */
2647 buffer[SPC_ADDITIONAL_DESC_LEN_OFFSET] = 0xa;
2648 buffer[SPC_VALIDITY_OFFSET] = 0x80;
2649
2650 /* Descriptor Information: failing sector */
2651 put_unaligned_be64(bad_sector, &buffer[12]);
2652}
2653
de103c93
CH		 2654int
2655transport_send_check_condition_and_sense(struct se_cmd *cmd,
2656 sense_reason_t reason, int from_transport)
c66ac9db
NB		 2657{
2658 unsigned char *buffer = cmd->sense_buffer;
2659 unsigned long flags;
c66ac9db
NB		 2660 u8 asc = 0, ascq = 0;
2661
a1d8b49a 2662 spin_lock_irqsave(&cmd->t_state_lock, flags);
c66ac9db 2663 if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION) {
a1d8b49a 2664 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
c66ac9db
NB		 2665 return 0;
2666 }
2667 cmd->se_cmd_flags |= SCF_SENT_CHECK_CONDITION;
a1d8b49a 2668 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
c66ac9db
NB		 2669
2670 if (!reason && from_transport)
2671 goto after_reason;
2672
2673 if (!from_transport)
2674 cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE;
9c58b7dd 2675
c66ac9db
NB		 2676 /*
2677 * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses
2678 * SENSE KEY values from include/scsi/scsi.h
2679 */
2680 switch (reason) {
ba829137
HR		 2681 case TCM_NO_SENSE:
2682 /* CURRENT ERROR */
2683 buffer[0] = 0x70;
2684 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
2685 /* Not Ready */
2686 buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY;
2687 /* NO ADDITIONAL SENSE INFORMATION */
2688 buffer[SPC_ASC_KEY_OFFSET] = 0;
2689 buffer[SPC_ASCQ_KEY_OFFSET] = 0;
2690 break;
c66ac9db 2691 case TCM_NON_EXISTENT_LUN:
eb39d340 2692 /* CURRENT ERROR */
9c58b7dd
RD		 2693 buffer[0] = 0x70;
2694 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
eb39d340 2695 /* ILLEGAL REQUEST */
9c58b7dd 2696 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
eb39d340 2697 /* LOGICAL UNIT NOT SUPPORTED */
9c58b7dd 2698 buffer[SPC_ASC_KEY_OFFSET] = 0x25;
eb39d340 2699 break;
c66ac9db
NB		 2700 case TCM_UNSUPPORTED_SCSI_OPCODE:
2701 case TCM_SECTOR_COUNT_TOO_MANY:
2702 /* CURRENT ERROR */
9c58b7dd
RD		 2703 buffer[0] = 0x70;
2704 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2705 /* ILLEGAL REQUEST */
9c58b7dd 2706 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
c66ac9db 2707 /* INVALID COMMAND OPERATION CODE */
9c58b7dd 2708 buffer[SPC_ASC_KEY_OFFSET] = 0x20;
c66ac9db
NB		 2709 break;
2710 case TCM_UNKNOWN_MODE_PAGE:
2711 /* CURRENT ERROR */
9c58b7dd
RD		 2712 buffer[0] = 0x70;
2713 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2714 /* ILLEGAL REQUEST */
9c58b7dd 2715 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
c66ac9db 2716 /* INVALID FIELD IN CDB */
9c58b7dd 2717 buffer[SPC_ASC_KEY_OFFSET] = 0x24;
c66ac9db
NB		 2718 break;
2719 case TCM_CHECK_CONDITION_ABORT_CMD:
2720 /* CURRENT ERROR */
9c58b7dd
RD		 2721 buffer[0] = 0x70;
2722 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2723 /* ABORTED COMMAND */
9c58b7dd 2724 buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
c66ac9db 2725 /* BUS DEVICE RESET FUNCTION OCCURRED */
9c58b7dd
RD		 2726 buffer[SPC_ASC_KEY_OFFSET] = 0x29;
2727 buffer[SPC_ASCQ_KEY_OFFSET] = 0x03;
c66ac9db
NB		 2728 break;
2729 case TCM_INCORRECT_AMOUNT_OF_DATA:
2730 /* CURRENT ERROR */
9c58b7dd
RD		 2731 buffer[0] = 0x70;
2732 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2733 /* ABORTED COMMAND */
9c58b7dd 2734 buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
c66ac9db 2735 /* WRITE ERROR */
9c58b7dd 2736 buffer[SPC_ASC_KEY_OFFSET] = 0x0c;
c66ac9db 2737 /* NOT ENOUGH UNSOLICITED DATA */
9c58b7dd 2738 buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d;
c66ac9db
NB		 2739 break;
2740 case TCM_INVALID_CDB_FIELD:
2741 /* CURRENT ERROR */
9c58b7dd
RD		 2742 buffer[0] = 0x70;
2743 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
9fbc8909 2744 /* ILLEGAL REQUEST */
9c58b7dd 2745 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
c66ac9db 2746 /* INVALID FIELD IN CDB */
9c58b7dd 2747 buffer[SPC_ASC_KEY_OFFSET] = 0x24;
c66ac9db
NB		 2748 break;
2749 case TCM_INVALID_PARAMETER_LIST:
2750 /* CURRENT ERROR */
9c58b7dd
RD		 2751 buffer[0] = 0x70;
2752 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
9fbc8909 2753 /* ILLEGAL REQUEST */
9c58b7dd 2754 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
c66ac9db 2755 /* INVALID FIELD IN PARAMETER LIST */
9c58b7dd 2756 buffer[SPC_ASC_KEY_OFFSET] = 0x26;
c66ac9db 2757 break;
bb992e72
RD		 2758 case TCM_PARAMETER_LIST_LENGTH_ERROR:
2759 /* CURRENT ERROR */
2760 buffer[0] = 0x70;
2761 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
2762 /* ILLEGAL REQUEST */
2763 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2764 /* PARAMETER LIST LENGTH ERROR */
2765 buffer[SPC_ASC_KEY_OFFSET] = 0x1a;
2766 break;
c66ac9db
NB		 2767 case TCM_UNEXPECTED_UNSOLICITED_DATA:
2768 /* CURRENT ERROR */
9c58b7dd
RD		 2769 buffer[0] = 0x70;
2770 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2771 /* ABORTED COMMAND */
9c58b7dd 2772 buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
c66ac9db 2773 /* WRITE ERROR */
9c58b7dd 2774 buffer[SPC_ASC_KEY_OFFSET] = 0x0c;
c66ac9db 2775 /* UNEXPECTED_UNSOLICITED_DATA */
9c58b7dd 2776 buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c;
c66ac9db
NB		 2777 break;
2778 case TCM_SERVICE_CRC_ERROR:
2779 /* CURRENT ERROR */
9c58b7dd
RD		 2780 buffer[0] = 0x70;
2781 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2782 /* ABORTED COMMAND */
9c58b7dd 2783 buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
c66ac9db 2784 /* PROTOCOL SERVICE CRC ERROR */
9c58b7dd 2785 buffer[SPC_ASC_KEY_OFFSET] = 0x47;
c66ac9db 2786 /* N/A */
9c58b7dd 2787 buffer[SPC_ASCQ_KEY_OFFSET] = 0x05;
c66ac9db
NB		 2788 break;
2789 case TCM_SNACK_REJECTED:
2790 /* CURRENT ERROR */
9c58b7dd
RD		 2791 buffer[0] = 0x70;
2792 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2793 /* ABORTED COMMAND */
9c58b7dd 2794 buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
c66ac9db 2795 /* READ ERROR */
9c58b7dd 2796 buffer[SPC_ASC_KEY_OFFSET] = 0x11;
c66ac9db 2797 /* FAILED RETRANSMISSION REQUEST */
9c58b7dd 2798 buffer[SPC_ASCQ_KEY_OFFSET] = 0x13;
c66ac9db
NB		 2799 break;
2800 case TCM_WRITE_PROTECTED:
2801 /* CURRENT ERROR */
9c58b7dd
RD		 2802 buffer[0] = 0x70;
2803 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2804 /* DATA PROTECT */
9c58b7dd 2805 buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT;
c66ac9db 2806 /* WRITE PROTECTED */
9c58b7dd 2807 buffer[SPC_ASC_KEY_OFFSET] = 0x27;
c66ac9db 2808 break;
e2397c70
RD		 2809 case TCM_ADDRESS_OUT_OF_RANGE:
2810 /* CURRENT ERROR */
9c58b7dd
RD		 2811 buffer[0] = 0x70;
2812 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
e2397c70 2813 /* ILLEGAL REQUEST */
9c58b7dd 2814 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
e2397c70 2815 /* LOGICAL BLOCK ADDRESS OUT OF RANGE */
9c58b7dd 2816 buffer[SPC_ASC_KEY_OFFSET] = 0x21;
e2397c70 2817 break;
c66ac9db
NB		 2818 case TCM_CHECK_CONDITION_UNIT_ATTENTION:
2819 /* CURRENT ERROR */
9c58b7dd
RD		 2820 buffer[0] = 0x70;
2821 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2822 /* UNIT ATTENTION */
9c58b7dd 2823 buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
c66ac9db 2824 core_scsi3_ua_for_check_condition(cmd, &asc, &ascq);
9c58b7dd
RD		 2825 buffer[SPC_ASC_KEY_OFFSET] = asc;
2826 buffer[SPC_ASCQ_KEY_OFFSET] = ascq;
c66ac9db
NB		 2827 break;
2828 case TCM_CHECK_CONDITION_NOT_READY:
2829 /* CURRENT ERROR */
9c58b7dd
RD		 2830 buffer[0] = 0x70;
2831 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
c66ac9db 2832 /* Not Ready */
9c58b7dd 2833 buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY;
c66ac9db 2834 transport_get_sense_codes(cmd, &asc, &ascq);
9c58b7dd
RD		 2835 buffer[SPC_ASC_KEY_OFFSET] = asc;
2836 buffer[SPC_ASCQ_KEY_OFFSET] = ascq;
c66ac9db 2837 break;
818b571c
NB		 2838 case TCM_MISCOMPARE_VERIFY:
2839 /* CURRENT ERROR */
2840 buffer[0] = 0x70;
2841 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
2842 buffer[SPC_SENSE_KEY_OFFSET] = MISCOMPARE;
2843 /* MISCOMPARE DURING VERIFY OPERATION */
2844 buffer[SPC_ASC_KEY_OFFSET] = 0x1d;
2845 buffer[SPC_ASCQ_KEY_OFFSET] = 0x00;
2846 break;
fcc4f17b
NB		 2847 case TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED:
2848 /* CURRENT ERROR */
2849 buffer[0] = 0x70;
2850 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
2851 /* ILLEGAL REQUEST */
2852 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2853 /* LOGICAL BLOCK GUARD CHECK FAILED */
2854 buffer[SPC_ASC_KEY_OFFSET] = 0x10;
2855 buffer[SPC_ASCQ_KEY_OFFSET] = 0x01;
76736db3 2856 transport_err_sector_info(buffer, cmd->bad_sector);
fcc4f17b
NB		 2857 break;
2858 case TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED:
2859 /* CURRENT ERROR */
2860 buffer[0] = 0x70;
2861 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
2862 /* ILLEGAL REQUEST */
2863 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2864 /* LOGICAL BLOCK APPLICATION TAG CHECK FAILED */
2865 buffer[SPC_ASC_KEY_OFFSET] = 0x10;
2866 buffer[SPC_ASCQ_KEY_OFFSET] = 0x02;
76736db3 2867 transport_err_sector_info(buffer, cmd->bad_sector);
fcc4f17b
NB		 2868 break;
2869 case TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED:
2870 /* CURRENT ERROR */
2871 buffer[0] = 0x70;
2872 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
2873 /* ILLEGAL REQUEST */
2874 buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
2875 /* LOGICAL BLOCK REFERENCE TAG CHECK FAILED */
2876 buffer[SPC_ASC_KEY_OFFSET] = 0x10;
2877 buffer[SPC_ASCQ_KEY_OFFSET] = 0x03;
76736db3 2878 transport_err_sector_info(buffer, cmd->bad_sector);
fcc4f17b 2879 break;
c66ac9db
NB		 2880 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
2881 default:
2882 /* CURRENT ERROR */
9c58b7dd
RD		 2883 buffer[0] = 0x70;
2884 buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
ad673282
JE		 2885 /*
2886 * Returning ILLEGAL REQUEST would cause immediate IO errors on
2887 * Solaris initiators. Returning NOT READY instead means the
2888 * operations will be retried a finite number of times and we
2889 * can survive intermittent errors.
2890 */
2891 buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY;
c66ac9db 2892 /* LOGICAL UNIT COMMUNICATION FAILURE */
18a9df42 2893 buffer[SPC_ASC_KEY_OFFSET] = 0x08;
c66ac9db
NB		 2894 break;
2895 }
2896 /*
2897 * This code uses linux/include/scsi/scsi.h SAM status codes!
2898 */
2899 cmd->scsi_status = SAM_STAT_CHECK_CONDITION;
2900 /*
2901 * Automatically padded, this value is encoded in the fabric's
2902 * data_length response PDU containing the SCSI defined sense data.
2903 */
9c58b7dd 2904 cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER;
c66ac9db
NB		 2905
2906after_reason:
e5c0d6ad 2907 trace_target_cmd_complete(cmd);
07bde79a 2908 return cmd->se_tfo->queue_status(cmd);
c66ac9db
NB		 2909}
2910EXPORT_SYMBOL(transport_send_check_condition_and_sense);
2911
2912int transport_check_aborted_status(struct se_cmd *cmd, int send_status)
2913{
c18bc7d8
RD		 2914 if (!(cmd->transport_state & CMD_T_ABORTED))
2915 return 0;
c66ac9db 2916
68259b5a
AL		 2917 /*
2918 * If cmd has been aborted but either no status is to be sent or it has
2919 * already been sent, just return
2920 */
2921 if (!send_status || !(cmd->se_cmd_flags & SCF_SEND_DELAYED_TAS))
c18bc7d8 2922 return 1;
8b1e1244 2923
c18bc7d8
RD		 2924 pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n",
2925 cmd->t_task_cdb[0], cmd->se_tfo->get_task_tag(cmd));
8b1e1244 2926
68259b5a 2927 cmd->se_cmd_flags &= ~SCF_SEND_DELAYED_TAS;
29f4c090 2928 cmd->scsi_status = SAM_STAT_TASK_ABORTED;
e5c0d6ad 2929 trace_target_cmd_complete(cmd);
c18bc7d8
RD		 2930 cmd->se_tfo->queue_status(cmd);
2931
2932 return 1;
c66ac9db
NB		 2933}
2934EXPORT_SYMBOL(transport_check_aborted_status);
2935
2936void transport_send_task_abort(struct se_cmd *cmd)
2937{
c252f003
NB		 2938 unsigned long flags;
2939
2940 spin_lock_irqsave(&cmd->t_state_lock, flags);
68259b5a 2941 if (cmd->se_cmd_flags & (SCF_SENT_CHECK_CONDITION)) {
c252f003
NB		 2942 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2943 return;
2944 }
2945 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
2946
c66ac9db
NB		 2947 /*
2948 * If there are still expected incoming fabric WRITEs, we wait
2949 * until until they have completed before sending a TASK_ABORTED
2950 * response. This response with TASK_ABORTED status will be
2951 * queued back to fabric module by transport_check_aborted_status().
2952 */
2953 if (cmd->data_direction == DMA_TO_DEVICE) {
e3d6f909 2954 if (cmd->se_tfo->write_pending_status(cmd) != 0) {
7d680f3b 2955 cmd->transport_state |= CMD_T_ABORTED;
68259b5a 2956 cmd->se_cmd_flags |= SCF_SEND_DELAYED_TAS;
29f4c090 2957 return;
c66ac9db
NB		 2958 }
2959 }
2960 cmd->scsi_status = SAM_STAT_TASK_ABORTED;
8b1e1244 2961
72b59d6e
RD		 2962 transport_lun_remove_cmd(cmd);
2963
6708bb27 2964 pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x,"
a1d8b49a 2965 " ITT: 0x%08x\n", cmd->t_task_cdb[0],
e3d6f909 2966 cmd->se_tfo->get_task_tag(cmd));
8b1e1244 2967
e5c0d6ad 2968 trace_target_cmd_complete(cmd);
e3d6f909 2969 cmd->se_tfo->queue_status(cmd);
c66ac9db
NB		 2970}
2971
af877292 2972static void target_tmr_work(struct work_struct *work)
c66ac9db 2973{
af877292 2974 struct se_cmd *cmd = container_of(work, struct se_cmd, work);
5951146d 2975 struct se_device *dev = cmd->se_dev;
c66ac9db
NB		 2976 struct se_tmr_req *tmr = cmd->se_tmr_req;
2977 int ret;
2978
2979 switch (tmr->function) {
5c6cd613 2980 case TMR_ABORT_TASK:
3d28934a 2981 core_tmr_abort_task(dev, tmr, cmd->se_sess);
c66ac9db 2982 break;
5c6cd613
NB		 2983 case TMR_ABORT_TASK_SET:
2984 case TMR_CLEAR_ACA:
2985 case TMR_CLEAR_TASK_SET:
c66ac9db
NB		 2986 tmr->response = TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED;
2987 break;
5c6cd613 2988 case TMR_LUN_RESET:
c66ac9db
NB		 2989 ret = core_tmr_lun_reset(dev, tmr, NULL, NULL);
2990 tmr->response = (!ret) ? TMR_FUNCTION_COMPLETE :
2991 TMR_FUNCTION_REJECTED;
2992 break;
5c6cd613 2993 case TMR_TARGET_WARM_RESET:
c66ac9db
NB		 2994 tmr->response = TMR_FUNCTION_REJECTED;
2995 break;
5c6cd613 2996 case TMR_TARGET_COLD_RESET:
c66ac9db
NB		 2997 tmr->response = TMR_FUNCTION_REJECTED;
2998 break;
c66ac9db 2999 default:
6708bb27 3000 pr_err("Uknown TMR function: 0x%02x.\n",
c66ac9db
NB		 3001 tmr->function);
3002 tmr->response = TMR_FUNCTION_REJECTED;
3003 break;
3004 }
3005
3006 cmd->t_state = TRANSPORT_ISTATE_PROCESSING;
e3d6f909 3007 cmd->se_tfo->queue_tm_rsp(cmd);
c66ac9db 3008
b7b8bef7 3009 transport_cmd_check_stop_to_fabric(cmd);
c66ac9db
NB		 3010}
3011
af877292
CH		 3012int transport_generic_handle_tmr(
3013 struct se_cmd *cmd)
c66ac9db 3014{
f15e9cd9
NB		 3015 unsigned long flags;
3016
3017 spin_lock_irqsave(&cmd->t_state_lock, flags);
3018 cmd->transport_state |= CMD_T_ACTIVE;
3019 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
3020
af877292
CH		 3021 INIT_WORK(&cmd->work, target_tmr_work);
3022 queue_work(cmd->se_dev->tmr_wq, &cmd->work);
c66ac9db
NB		 3023 return 0;
3024}
af877292 3025EXPORT_SYMBOL(transport_generic_handle_tmr);
Ubuntu Artful kernel mirror