1 /*******************************************************************************
2 * Filename: target_core_transport.c
4 * This file contains the Generic Target Engine Core.
6 * (c) Copyright 2002-2013 Datera, Inc.
8 * Nicholas A. Bellinger <nab@kernel.org>
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.
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.
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.
24 ******************************************************************************/
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>
31 #include <linux/spinlock.h>
32 #include <linux/kthread.h>
34 #include <linux/cdrom.h>
35 #include <linux/module.h>
36 #include <linux/ratelimit.h>
37 #include <asm/unaligned.h>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_cmnd.h>
42 #include <scsi/scsi_tcq.h>
44 #include <target/target_core_base.h>
45 #include <target/target_core_backend.h>
46 #include <target/target_core_fabric.h>
47 #include <target/target_core_configfs.h>
49 #include "target_core_internal.h"
50 #include "target_core_alua.h"
51 #include "target_core_pr.h"
52 #include "target_core_ua.h"
54 #define CREATE_TRACE_POINTS
55 #include <trace/events/target.h>
57 static struct workqueue_struct
*target_completion_wq
;
58 static struct kmem_cache
*se_sess_cache
;
59 struct kmem_cache
*se_ua_cache
;
60 struct kmem_cache
*t10_pr_reg_cache
;
61 struct kmem_cache
*t10_alua_lu_gp_cache
;
62 struct kmem_cache
*t10_alua_lu_gp_mem_cache
;
63 struct kmem_cache
*t10_alua_tg_pt_gp_cache
;
64 struct kmem_cache
*t10_alua_tg_pt_gp_mem_cache
;
66 static void transport_complete_task_attr(struct se_cmd
*cmd
);
67 static void transport_handle_queue_full(struct se_cmd
*cmd
,
68 struct se_device
*dev
);
69 static int transport_put_cmd(struct se_cmd
*cmd
);
70 static void target_complete_ok_work(struct work_struct
*work
);
72 int init_se_kmem_caches(void)
74 se_sess_cache
= kmem_cache_create("se_sess_cache",
75 sizeof(struct se_session
), __alignof__(struct se_session
),
78 pr_err("kmem_cache_create() for struct se_session"
82 se_ua_cache
= kmem_cache_create("se_ua_cache",
83 sizeof(struct se_ua
), __alignof__(struct se_ua
),
86 pr_err("kmem_cache_create() for struct se_ua failed\n");
87 goto out_free_sess_cache
;
89 t10_pr_reg_cache
= kmem_cache_create("t10_pr_reg_cache",
90 sizeof(struct t10_pr_registration
),
91 __alignof__(struct t10_pr_registration
), 0, NULL
);
92 if (!t10_pr_reg_cache
) {
93 pr_err("kmem_cache_create() for struct t10_pr_registration"
95 goto out_free_ua_cache
;
97 t10_alua_lu_gp_cache
= kmem_cache_create("t10_alua_lu_gp_cache",
98 sizeof(struct t10_alua_lu_gp
), __alignof__(struct t10_alua_lu_gp
),
100 if (!t10_alua_lu_gp_cache
) {
101 pr_err("kmem_cache_create() for t10_alua_lu_gp_cache"
103 goto out_free_pr_reg_cache
;
105 t10_alua_lu_gp_mem_cache
= kmem_cache_create("t10_alua_lu_gp_mem_cache",
106 sizeof(struct t10_alua_lu_gp_member
),
107 __alignof__(struct t10_alua_lu_gp_member
), 0, NULL
);
108 if (!t10_alua_lu_gp_mem_cache
) {
109 pr_err("kmem_cache_create() for t10_alua_lu_gp_mem_"
111 goto out_free_lu_gp_cache
;
113 t10_alua_tg_pt_gp_cache
= kmem_cache_create("t10_alua_tg_pt_gp_cache",
114 sizeof(struct t10_alua_tg_pt_gp
),
115 __alignof__(struct t10_alua_tg_pt_gp
), 0, NULL
);
116 if (!t10_alua_tg_pt_gp_cache
) {
117 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
119 goto out_free_lu_gp_mem_cache
;
121 t10_alua_tg_pt_gp_mem_cache
= kmem_cache_create(
122 "t10_alua_tg_pt_gp_mem_cache",
123 sizeof(struct t10_alua_tg_pt_gp_member
),
124 __alignof__(struct t10_alua_tg_pt_gp_member
),
126 if (!t10_alua_tg_pt_gp_mem_cache
) {
127 pr_err("kmem_cache_create() for t10_alua_tg_pt_gp_"
129 goto out_free_tg_pt_gp_cache
;
132 target_completion_wq
= alloc_workqueue("target_completion",
134 if (!target_completion_wq
)
135 goto out_free_tg_pt_gp_mem_cache
;
139 out_free_tg_pt_gp_mem_cache
:
140 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache
);
141 out_free_tg_pt_gp_cache
:
142 kmem_cache_destroy(t10_alua_tg_pt_gp_cache
);
143 out_free_lu_gp_mem_cache
:
144 kmem_cache_destroy(t10_alua_lu_gp_mem_cache
);
145 out_free_lu_gp_cache
:
146 kmem_cache_destroy(t10_alua_lu_gp_cache
);
147 out_free_pr_reg_cache
:
148 kmem_cache_destroy(t10_pr_reg_cache
);
150 kmem_cache_destroy(se_ua_cache
);
152 kmem_cache_destroy(se_sess_cache
);
157 void release_se_kmem_caches(void)
159 destroy_workqueue(target_completion_wq
);
160 kmem_cache_destroy(se_sess_cache
);
161 kmem_cache_destroy(se_ua_cache
);
162 kmem_cache_destroy(t10_pr_reg_cache
);
163 kmem_cache_destroy(t10_alua_lu_gp_cache
);
164 kmem_cache_destroy(t10_alua_lu_gp_mem_cache
);
165 kmem_cache_destroy(t10_alua_tg_pt_gp_cache
);
166 kmem_cache_destroy(t10_alua_tg_pt_gp_mem_cache
);
169 /* This code ensures unique mib indexes are handed out. */
170 static DEFINE_SPINLOCK(scsi_mib_index_lock
);
171 static u32 scsi_mib_index
[SCSI_INDEX_TYPE_MAX
];
174 * Allocate a new row index for the entry type specified
176 u32
scsi_get_new_index(scsi_index_t type
)
180 BUG_ON((type
< 0) || (type
>= SCSI_INDEX_TYPE_MAX
));
182 spin_lock(&scsi_mib_index_lock
);
183 new_index
= ++scsi_mib_index
[type
];
184 spin_unlock(&scsi_mib_index_lock
);
189 void transport_subsystem_check_init(void)
192 static int sub_api_initialized
;
194 if (sub_api_initialized
)
197 ret
= request_module("target_core_iblock");
199 pr_err("Unable to load target_core_iblock\n");
201 ret
= request_module("target_core_file");
203 pr_err("Unable to load target_core_file\n");
205 ret
= request_module("target_core_pscsi");
207 pr_err("Unable to load target_core_pscsi\n");
209 sub_api_initialized
= 1;
212 struct se_session
*transport_init_session(void)
214 struct se_session
*se_sess
;
216 se_sess
= kmem_cache_zalloc(se_sess_cache
, GFP_KERNEL
);
218 pr_err("Unable to allocate struct se_session from"
220 return ERR_PTR(-ENOMEM
);
222 INIT_LIST_HEAD(&se_sess
->sess_list
);
223 INIT_LIST_HEAD(&se_sess
->sess_acl_list
);
224 INIT_LIST_HEAD(&se_sess
->sess_cmd_list
);
225 INIT_LIST_HEAD(&se_sess
->sess_wait_list
);
226 spin_lock_init(&se_sess
->sess_cmd_lock
);
227 kref_init(&se_sess
->sess_kref
);
231 EXPORT_SYMBOL(transport_init_session
);
233 int transport_alloc_session_tags(struct se_session
*se_sess
,
234 unsigned int tag_num
, unsigned int tag_size
)
238 se_sess
->sess_cmd_map
= kzalloc(tag_num
* tag_size
,
239 GFP_KERNEL
| __GFP_NOWARN
| __GFP_REPEAT
);
240 if (!se_sess
->sess_cmd_map
) {
241 se_sess
->sess_cmd_map
= vzalloc(tag_num
* tag_size
);
242 if (!se_sess
->sess_cmd_map
) {
243 pr_err("Unable to allocate se_sess->sess_cmd_map\n");
248 rc
= percpu_ida_init(&se_sess
->sess_tag_pool
, tag_num
);
250 pr_err("Unable to init se_sess->sess_tag_pool,"
251 " tag_num: %u\n", tag_num
);
252 if (is_vmalloc_addr(se_sess
->sess_cmd_map
))
253 vfree(se_sess
->sess_cmd_map
);
255 kfree(se_sess
->sess_cmd_map
);
256 se_sess
->sess_cmd_map
= NULL
;
262 EXPORT_SYMBOL(transport_alloc_session_tags
);
264 struct se_session
*transport_init_session_tags(unsigned int tag_num
,
265 unsigned int tag_size
)
267 struct se_session
*se_sess
;
270 se_sess
= transport_init_session();
274 rc
= transport_alloc_session_tags(se_sess
, tag_num
, tag_size
);
276 transport_free_session(se_sess
);
277 return ERR_PTR(-ENOMEM
);
282 EXPORT_SYMBOL(transport_init_session_tags
);
285 * Called with spin_lock_irqsave(&struct se_portal_group->session_lock called.
287 void __transport_register_session(
288 struct se_portal_group
*se_tpg
,
289 struct se_node_acl
*se_nacl
,
290 struct se_session
*se_sess
,
291 void *fabric_sess_ptr
)
293 unsigned char buf
[PR_REG_ISID_LEN
];
295 se_sess
->se_tpg
= se_tpg
;
296 se_sess
->fabric_sess_ptr
= fabric_sess_ptr
;
298 * Used by struct se_node_acl's under ConfigFS to locate active se_session-t
300 * Only set for struct se_session's that will actually be moving I/O.
301 * eg: *NOT* discovery sessions.
305 * If the fabric module supports an ISID based TransportID,
306 * save this value in binary from the fabric I_T Nexus now.
308 if (se_tpg
->se_tpg_tfo
->sess_get_initiator_sid
!= NULL
) {
309 memset(&buf
[0], 0, PR_REG_ISID_LEN
);
310 se_tpg
->se_tpg_tfo
->sess_get_initiator_sid(se_sess
,
311 &buf
[0], PR_REG_ISID_LEN
);
312 se_sess
->sess_bin_isid
= get_unaligned_be64(&buf
[0]);
314 kref_get(&se_nacl
->acl_kref
);
316 spin_lock_irq(&se_nacl
->nacl_sess_lock
);
318 * The se_nacl->nacl_sess pointer will be set to the
319 * last active I_T Nexus for each struct se_node_acl.
321 se_nacl
->nacl_sess
= se_sess
;
323 list_add_tail(&se_sess
->sess_acl_list
,
324 &se_nacl
->acl_sess_list
);
325 spin_unlock_irq(&se_nacl
->nacl_sess_lock
);
327 list_add_tail(&se_sess
->sess_list
, &se_tpg
->tpg_sess_list
);
329 pr_debug("TARGET_CORE[%s]: Registered fabric_sess_ptr: %p\n",
330 se_tpg
->se_tpg_tfo
->get_fabric_name(), se_sess
->fabric_sess_ptr
);
332 EXPORT_SYMBOL(__transport_register_session
);
334 void transport_register_session(
335 struct se_portal_group
*se_tpg
,
336 struct se_node_acl
*se_nacl
,
337 struct se_session
*se_sess
,
338 void *fabric_sess_ptr
)
342 spin_lock_irqsave(&se_tpg
->session_lock
, flags
);
343 __transport_register_session(se_tpg
, se_nacl
, se_sess
, fabric_sess_ptr
);
344 spin_unlock_irqrestore(&se_tpg
->session_lock
, flags
);
346 EXPORT_SYMBOL(transport_register_session
);
348 static void target_release_session(struct kref
*kref
)
350 struct se_session
*se_sess
= container_of(kref
,
351 struct se_session
, sess_kref
);
352 struct se_portal_group
*se_tpg
= se_sess
->se_tpg
;
354 se_tpg
->se_tpg_tfo
->close_session(se_sess
);
357 void target_get_session(struct se_session
*se_sess
)
359 kref_get(&se_sess
->sess_kref
);
361 EXPORT_SYMBOL(target_get_session
);
363 void target_put_session(struct se_session
*se_sess
)
365 struct se_portal_group
*tpg
= se_sess
->se_tpg
;
367 if (tpg
->se_tpg_tfo
->put_session
!= NULL
) {
368 tpg
->se_tpg_tfo
->put_session(se_sess
);
371 kref_put(&se_sess
->sess_kref
, target_release_session
);
373 EXPORT_SYMBOL(target_put_session
);
375 static void target_complete_nacl(struct kref
*kref
)
377 struct se_node_acl
*nacl
= container_of(kref
,
378 struct se_node_acl
, acl_kref
);
380 complete(&nacl
->acl_free_comp
);
383 void target_put_nacl(struct se_node_acl
*nacl
)
385 kref_put(&nacl
->acl_kref
, target_complete_nacl
);
388 void transport_deregister_session_configfs(struct se_session
*se_sess
)
390 struct se_node_acl
*se_nacl
;
393 * Used by struct se_node_acl's under ConfigFS to locate active struct se_session
395 se_nacl
= se_sess
->se_node_acl
;
397 spin_lock_irqsave(&se_nacl
->nacl_sess_lock
, flags
);
398 if (se_nacl
->acl_stop
== 0)
399 list_del(&se_sess
->sess_acl_list
);
401 * If the session list is empty, then clear the pointer.
402 * Otherwise, set the struct se_session pointer from the tail
403 * element of the per struct se_node_acl active session list.
405 if (list_empty(&se_nacl
->acl_sess_list
))
406 se_nacl
->nacl_sess
= NULL
;
408 se_nacl
->nacl_sess
= container_of(
409 se_nacl
->acl_sess_list
.prev
,
410 struct se_session
, sess_acl_list
);
412 spin_unlock_irqrestore(&se_nacl
->nacl_sess_lock
, flags
);
415 EXPORT_SYMBOL(transport_deregister_session_configfs
);
417 void transport_free_session(struct se_session
*se_sess
)
419 if (se_sess
->sess_cmd_map
) {
420 percpu_ida_destroy(&se_sess
->sess_tag_pool
);
421 if (is_vmalloc_addr(se_sess
->sess_cmd_map
))
422 vfree(se_sess
->sess_cmd_map
);
424 kfree(se_sess
->sess_cmd_map
);
426 kmem_cache_free(se_sess_cache
, se_sess
);
428 EXPORT_SYMBOL(transport_free_session
);
430 void transport_deregister_session(struct se_session
*se_sess
)
432 struct se_portal_group
*se_tpg
= se_sess
->se_tpg
;
433 struct target_core_fabric_ops
*se_tfo
;
434 struct se_node_acl
*se_nacl
;
436 bool comp_nacl
= true;
439 transport_free_session(se_sess
);
442 se_tfo
= se_tpg
->se_tpg_tfo
;
444 spin_lock_irqsave(&se_tpg
->session_lock
, flags
);
445 list_del(&se_sess
->sess_list
);
446 se_sess
->se_tpg
= NULL
;
447 se_sess
->fabric_sess_ptr
= NULL
;
448 spin_unlock_irqrestore(&se_tpg
->session_lock
, flags
);
451 * Determine if we need to do extra work for this initiator node's
452 * struct se_node_acl if it had been previously dynamically generated.
454 se_nacl
= se_sess
->se_node_acl
;
456 spin_lock_irqsave(&se_tpg
->acl_node_lock
, flags
);
457 if (se_nacl
&& se_nacl
->dynamic_node_acl
) {
458 if (!se_tfo
->tpg_check_demo_mode_cache(se_tpg
)) {
459 list_del(&se_nacl
->acl_list
);
460 se_tpg
->num_node_acls
--;
461 spin_unlock_irqrestore(&se_tpg
->acl_node_lock
, flags
);
462 core_tpg_wait_for_nacl_pr_ref(se_nacl
);
463 core_free_device_list_for_node(se_nacl
, se_tpg
);
464 se_tfo
->tpg_release_fabric_acl(se_tpg
, se_nacl
);
467 spin_lock_irqsave(&se_tpg
->acl_node_lock
, flags
);
470 spin_unlock_irqrestore(&se_tpg
->acl_node_lock
, flags
);
472 pr_debug("TARGET_CORE[%s]: Deregistered fabric_sess\n",
473 se_tpg
->se_tpg_tfo
->get_fabric_name());
475 * If last kref is dropping now for an explicit NodeACL, awake sleeping
476 * ->acl_free_comp caller to wakeup configfs se_node_acl->acl_group
479 if (se_nacl
&& comp_nacl
== true)
480 target_put_nacl(se_nacl
);
482 transport_free_session(se_sess
);
484 EXPORT_SYMBOL(transport_deregister_session
);
487 * Called with cmd->t_state_lock held.
489 static void target_remove_from_state_list(struct se_cmd
*cmd
)
491 struct se_device
*dev
= cmd
->se_dev
;
497 if (cmd
->transport_state
& CMD_T_BUSY
)
500 spin_lock_irqsave(&dev
->execute_task_lock
, flags
);
501 if (cmd
->state_active
) {
502 list_del(&cmd
->state_list
);
503 cmd
->state_active
= false;
505 spin_unlock_irqrestore(&dev
->execute_task_lock
, flags
);
508 static int transport_cmd_check_stop(struct se_cmd
*cmd
, bool remove_from_lists
,
513 spin_lock_irqsave(&cmd
->t_state_lock
, flags
);
515 cmd
->t_state
= TRANSPORT_WRITE_PENDING
;
517 if (remove_from_lists
) {
518 target_remove_from_state_list(cmd
);
521 * Clear struct se_cmd->se_lun before the handoff to FE.
527 * Determine if frontend context caller is requesting the stopping of
528 * this command for frontend exceptions.
530 if (cmd
->transport_state
& CMD_T_STOP
) {
531 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
533 cmd
->se_tfo
->get_task_tag(cmd
));
535 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
537 complete(&cmd
->t_transport_stop_comp
);
541 cmd
->transport_state
&= ~CMD_T_ACTIVE
;
542 if (remove_from_lists
) {
544 * Some fabric modules like tcm_loop can release
545 * their internally allocated I/O reference now and
548 * Fabric modules are expected to return '1' here if the
549 * se_cmd being passed is released at this point,
550 * or zero if not being released.
552 if (cmd
->se_tfo
->check_stop_free
!= NULL
) {
553 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
554 return cmd
->se_tfo
->check_stop_free(cmd
);
558 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
562 static int transport_cmd_check_stop_to_fabric(struct se_cmd
*cmd
)
564 return transport_cmd_check_stop(cmd
, true, false);
567 static void transport_lun_remove_cmd(struct se_cmd
*cmd
)
569 struct se_lun
*lun
= cmd
->se_lun
;
571 if (!lun
|| !cmd
->lun_ref_active
)
574 percpu_ref_put(&lun
->lun_ref
);
577 void transport_cmd_finish_abort(struct se_cmd
*cmd
, int remove
)
579 if (transport_cmd_check_stop_to_fabric(cmd
))
582 transport_put_cmd(cmd
);
585 static void target_complete_failure_work(struct work_struct
*work
)
587 struct se_cmd
*cmd
= container_of(work
, struct se_cmd
, work
);
589 transport_generic_request_failure(cmd
,
590 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
);
594 * Used when asking transport to copy Sense Data from the underlying
595 * Linux/SCSI struct scsi_cmnd
597 static unsigned char *transport_get_sense_buffer(struct se_cmd
*cmd
)
599 struct se_device
*dev
= cmd
->se_dev
;
601 WARN_ON(!cmd
->se_lun
);
606 if (cmd
->se_cmd_flags
& SCF_SENT_CHECK_CONDITION
)
609 cmd
->scsi_sense_length
= TRANSPORT_SENSE_BUFFER
;
611 pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n",
612 dev
->se_hba
->hba_id
, dev
->transport
->name
, cmd
->scsi_status
);
613 return cmd
->sense_buffer
;
616 void target_complete_cmd(struct se_cmd
*cmd
, u8 scsi_status
)
618 struct se_device
*dev
= cmd
->se_dev
;
619 int success
= scsi_status
== GOOD
;
622 cmd
->scsi_status
= scsi_status
;
625 spin_lock_irqsave(&cmd
->t_state_lock
, flags
);
626 cmd
->transport_state
&= ~CMD_T_BUSY
;
628 if (dev
&& dev
->transport
->transport_complete
) {
629 dev
->transport
->transport_complete(cmd
,
631 transport_get_sense_buffer(cmd
));
632 if (cmd
->se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
)
637 * See if we are waiting to complete for an exception condition.
639 if (cmd
->transport_state
& CMD_T_REQUEST_STOP
) {
640 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
641 complete(&cmd
->task_stop_comp
);
646 cmd
->transport_state
|= CMD_T_FAILED
;
649 * Check for case where an explicit ABORT_TASK has been received
650 * and transport_wait_for_tasks() will be waiting for completion..
652 if (cmd
->transport_state
& CMD_T_ABORTED
&&
653 cmd
->transport_state
& CMD_T_STOP
) {
654 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
655 complete(&cmd
->t_transport_stop_comp
);
657 } else if (cmd
->transport_state
& CMD_T_FAILED
) {
658 INIT_WORK(&cmd
->work
, target_complete_failure_work
);
660 INIT_WORK(&cmd
->work
, target_complete_ok_work
);
663 cmd
->t_state
= TRANSPORT_COMPLETE
;
664 cmd
->transport_state
|= (CMD_T_COMPLETE
| CMD_T_ACTIVE
);
665 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
667 queue_work(target_completion_wq
, &cmd
->work
);
669 EXPORT_SYMBOL(target_complete_cmd
);
671 static void target_add_to_state_list(struct se_cmd
*cmd
)
673 struct se_device
*dev
= cmd
->se_dev
;
676 spin_lock_irqsave(&dev
->execute_task_lock
, flags
);
677 if (!cmd
->state_active
) {
678 list_add_tail(&cmd
->state_list
, &dev
->state_list
);
679 cmd
->state_active
= true;
681 spin_unlock_irqrestore(&dev
->execute_task_lock
, flags
);
685 * Handle QUEUE_FULL / -EAGAIN and -ENOMEM status
687 static void transport_write_pending_qf(struct se_cmd
*cmd
);
688 static void transport_complete_qf(struct se_cmd
*cmd
);
690 void target_qf_do_work(struct work_struct
*work
)
692 struct se_device
*dev
= container_of(work
, struct se_device
,
694 LIST_HEAD(qf_cmd_list
);
695 struct se_cmd
*cmd
, *cmd_tmp
;
697 spin_lock_irq(&dev
->qf_cmd_lock
);
698 list_splice_init(&dev
->qf_cmd_list
, &qf_cmd_list
);
699 spin_unlock_irq(&dev
->qf_cmd_lock
);
701 list_for_each_entry_safe(cmd
, cmd_tmp
, &qf_cmd_list
, se_qf_node
) {
702 list_del(&cmd
->se_qf_node
);
703 atomic_dec(&dev
->dev_qf_count
);
704 smp_mb__after_atomic_dec();
706 pr_debug("Processing %s cmd: %p QUEUE_FULL in work queue"
707 " context: %s\n", cmd
->se_tfo
->get_fabric_name(), cmd
,
708 (cmd
->t_state
== TRANSPORT_COMPLETE_QF_OK
) ? "COMPLETE_OK" :
709 (cmd
->t_state
== TRANSPORT_COMPLETE_QF_WP
) ? "WRITE_PENDING"
712 if (cmd
->t_state
== TRANSPORT_COMPLETE_QF_WP
)
713 transport_write_pending_qf(cmd
);
714 else if (cmd
->t_state
== TRANSPORT_COMPLETE_QF_OK
)
715 transport_complete_qf(cmd
);
719 unsigned char *transport_dump_cmd_direction(struct se_cmd
*cmd
)
721 switch (cmd
->data_direction
) {
724 case DMA_FROM_DEVICE
:
728 case DMA_BIDIRECTIONAL
:
737 void transport_dump_dev_state(
738 struct se_device
*dev
,
742 *bl
+= sprintf(b
+ *bl
, "Status: ");
743 if (dev
->export_count
)
744 *bl
+= sprintf(b
+ *bl
, "ACTIVATED");
746 *bl
+= sprintf(b
+ *bl
, "DEACTIVATED");
748 *bl
+= sprintf(b
+ *bl
, " Max Queue Depth: %d", dev
->queue_depth
);
749 *bl
+= sprintf(b
+ *bl
, " SectorSize: %u HwMaxSectors: %u\n",
750 dev
->dev_attrib
.block_size
,
751 dev
->dev_attrib
.hw_max_sectors
);
752 *bl
+= sprintf(b
+ *bl
, " ");
755 void transport_dump_vpd_proto_id(
757 unsigned char *p_buf
,
760 unsigned char buf
[VPD_TMP_BUF_SIZE
];
763 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
764 len
= sprintf(buf
, "T10 VPD Protocol Identifier: ");
766 switch (vpd
->protocol_identifier
) {
768 sprintf(buf
+len
, "Fibre Channel\n");
771 sprintf(buf
+len
, "Parallel SCSI\n");
774 sprintf(buf
+len
, "SSA\n");
777 sprintf(buf
+len
, "IEEE 1394\n");
780 sprintf(buf
+len
, "SCSI Remote Direct Memory Access"
784 sprintf(buf
+len
, "Internet SCSI (iSCSI)\n");
787 sprintf(buf
+len
, "SAS Serial SCSI Protocol\n");
790 sprintf(buf
+len
, "Automation/Drive Interface Transport"
794 sprintf(buf
+len
, "AT Attachment Interface ATA/ATAPI\n");
797 sprintf(buf
+len
, "Unknown 0x%02x\n",
798 vpd
->protocol_identifier
);
803 strncpy(p_buf
, buf
, p_buf_len
);
809 transport_set_vpd_proto_id(struct t10_vpd
*vpd
, unsigned char *page_83
)
812 * Check if the Protocol Identifier Valid (PIV) bit is set..
814 * from spc3r23.pdf section 7.5.1
816 if (page_83
[1] & 0x80) {
817 vpd
->protocol_identifier
= (page_83
[0] & 0xf0);
818 vpd
->protocol_identifier_set
= 1;
819 transport_dump_vpd_proto_id(vpd
, NULL
, 0);
822 EXPORT_SYMBOL(transport_set_vpd_proto_id
);
824 int transport_dump_vpd_assoc(
826 unsigned char *p_buf
,
829 unsigned char buf
[VPD_TMP_BUF_SIZE
];
833 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
834 len
= sprintf(buf
, "T10 VPD Identifier Association: ");
836 switch (vpd
->association
) {
838 sprintf(buf
+len
, "addressed logical unit\n");
841 sprintf(buf
+len
, "target port\n");
844 sprintf(buf
+len
, "SCSI target device\n");
847 sprintf(buf
+len
, "Unknown 0x%02x\n", vpd
->association
);
853 strncpy(p_buf
, buf
, p_buf_len
);
860 int transport_set_vpd_assoc(struct t10_vpd
*vpd
, unsigned char *page_83
)
863 * The VPD identification association..
865 * from spc3r23.pdf Section 7.6.3.1 Table 297
867 vpd
->association
= (page_83
[1] & 0x30);
868 return transport_dump_vpd_assoc(vpd
, NULL
, 0);
870 EXPORT_SYMBOL(transport_set_vpd_assoc
);
872 int transport_dump_vpd_ident_type(
874 unsigned char *p_buf
,
877 unsigned char buf
[VPD_TMP_BUF_SIZE
];
881 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
882 len
= sprintf(buf
, "T10 VPD Identifier Type: ");
884 switch (vpd
->device_identifier_type
) {
886 sprintf(buf
+len
, "Vendor specific\n");
889 sprintf(buf
+len
, "T10 Vendor ID based\n");
892 sprintf(buf
+len
, "EUI-64 based\n");
895 sprintf(buf
+len
, "NAA\n");
898 sprintf(buf
+len
, "Relative target port identifier\n");
901 sprintf(buf
+len
, "SCSI name string\n");
904 sprintf(buf
+len
, "Unsupported: 0x%02x\n",
905 vpd
->device_identifier_type
);
911 if (p_buf_len
< strlen(buf
)+1)
913 strncpy(p_buf
, buf
, p_buf_len
);
921 int transport_set_vpd_ident_type(struct t10_vpd
*vpd
, unsigned char *page_83
)
924 * The VPD identifier type..
926 * from spc3r23.pdf Section 7.6.3.1 Table 298
928 vpd
->device_identifier_type
= (page_83
[1] & 0x0f);
929 return transport_dump_vpd_ident_type(vpd
, NULL
, 0);
931 EXPORT_SYMBOL(transport_set_vpd_ident_type
);
933 int transport_dump_vpd_ident(
935 unsigned char *p_buf
,
938 unsigned char buf
[VPD_TMP_BUF_SIZE
];
941 memset(buf
, 0, VPD_TMP_BUF_SIZE
);
943 switch (vpd
->device_identifier_code_set
) {
944 case 0x01: /* Binary */
945 snprintf(buf
, sizeof(buf
),
946 "T10 VPD Binary Device Identifier: %s\n",
947 &vpd
->device_identifier
[0]);
949 case 0x02: /* ASCII */
950 snprintf(buf
, sizeof(buf
),
951 "T10 VPD ASCII Device Identifier: %s\n",
952 &vpd
->device_identifier
[0]);
954 case 0x03: /* UTF-8 */
955 snprintf(buf
, sizeof(buf
),
956 "T10 VPD UTF-8 Device Identifier: %s\n",
957 &vpd
->device_identifier
[0]);
960 sprintf(buf
, "T10 VPD Device Identifier encoding unsupported:"
961 " 0x%02x", vpd
->device_identifier_code_set
);
967 strncpy(p_buf
, buf
, p_buf_len
);
975 transport_set_vpd_ident(struct t10_vpd
*vpd
, unsigned char *page_83
)
977 static const char hex_str
[] = "0123456789abcdef";
978 int j
= 0, i
= 4; /* offset to start of the identifier */
981 * The VPD Code Set (encoding)
983 * from spc3r23.pdf Section 7.6.3.1 Table 296
985 vpd
->device_identifier_code_set
= (page_83
[0] & 0x0f);
986 switch (vpd
->device_identifier_code_set
) {
987 case 0x01: /* Binary */
988 vpd
->device_identifier
[j
++] =
989 hex_str
[vpd
->device_identifier_type
];
990 while (i
< (4 + page_83
[3])) {
991 vpd
->device_identifier
[j
++] =
992 hex_str
[(page_83
[i
] & 0xf0) >> 4];
993 vpd
->device_identifier
[j
++] =
994 hex_str
[page_83
[i
] & 0x0f];
998 case 0x02: /* ASCII */
999 case 0x03: /* UTF-8 */
1000 while (i
< (4 + page_83
[3]))
1001 vpd
->device_identifier
[j
++] = page_83
[i
++];
1007 return transport_dump_vpd_ident(vpd
, NULL
, 0);
1009 EXPORT_SYMBOL(transport_set_vpd_ident
);
1012 target_cmd_size_check(struct se_cmd
*cmd
, unsigned int size
)
1014 struct se_device
*dev
= cmd
->se_dev
;
1016 if (cmd
->unknown_data_length
) {
1017 cmd
->data_length
= size
;
1018 } else if (size
!= cmd
->data_length
) {
1019 pr_warn("TARGET_CORE[%s]: Expected Transfer Length:"
1020 " %u does not match SCSI CDB Length: %u for SAM Opcode:"
1021 " 0x%02x\n", cmd
->se_tfo
->get_fabric_name(),
1022 cmd
->data_length
, size
, cmd
->t_task_cdb
[0]);
1024 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
1025 pr_err("Rejecting underflow/overflow"
1027 return TCM_INVALID_CDB_FIELD
;
1030 * Reject READ_* or WRITE_* with overflow/underflow for
1031 * type SCF_SCSI_DATA_CDB.
1033 if (dev
->dev_attrib
.block_size
!= 512) {
1034 pr_err("Failing OVERFLOW/UNDERFLOW for LBA op"
1035 " CDB on non 512-byte sector setup subsystem"
1036 " plugin: %s\n", dev
->transport
->name
);
1037 /* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
1038 return TCM_INVALID_CDB_FIELD
;
1041 * For the overflow case keep the existing fabric provided
1042 * ->data_length. Otherwise for the underflow case, reset
1043 * ->data_length to the smaller SCSI expected data transfer
1046 if (size
> cmd
->data_length
) {
1047 cmd
->se_cmd_flags
|= SCF_OVERFLOW_BIT
;
1048 cmd
->residual_count
= (size
- cmd
->data_length
);
1050 cmd
->se_cmd_flags
|= SCF_UNDERFLOW_BIT
;
1051 cmd
->residual_count
= (cmd
->data_length
- size
);
1052 cmd
->data_length
= size
;
1061 * Used by fabric modules containing a local struct se_cmd within their
1062 * fabric dependent per I/O descriptor.
1064 void transport_init_se_cmd(
1066 struct target_core_fabric_ops
*tfo
,
1067 struct se_session
*se_sess
,
1071 unsigned char *sense_buffer
)
1073 INIT_LIST_HEAD(&cmd
->se_delayed_node
);
1074 INIT_LIST_HEAD(&cmd
->se_qf_node
);
1075 INIT_LIST_HEAD(&cmd
->se_cmd_list
);
1076 INIT_LIST_HEAD(&cmd
->state_list
);
1077 init_completion(&cmd
->t_transport_stop_comp
);
1078 init_completion(&cmd
->cmd_wait_comp
);
1079 init_completion(&cmd
->task_stop_comp
);
1080 spin_lock_init(&cmd
->t_state_lock
);
1081 cmd
->transport_state
= CMD_T_DEV_ACTIVE
;
1084 cmd
->se_sess
= se_sess
;
1085 cmd
->data_length
= data_length
;
1086 cmd
->data_direction
= data_direction
;
1087 cmd
->sam_task_attr
= task_attr
;
1088 cmd
->sense_buffer
= sense_buffer
;
1090 cmd
->state_active
= false;
1092 EXPORT_SYMBOL(transport_init_se_cmd
);
1094 static sense_reason_t
1095 transport_check_alloc_task_attr(struct se_cmd
*cmd
)
1097 struct se_device
*dev
= cmd
->se_dev
;
1100 * Check if SAM Task Attribute emulation is enabled for this
1101 * struct se_device storage object
1103 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1106 if (cmd
->sam_task_attr
== MSG_ACA_TAG
) {
1107 pr_debug("SAM Task Attribute ACA"
1108 " emulation is not supported\n");
1109 return TCM_INVALID_CDB_FIELD
;
1112 * Used to determine when ORDERED commands should go from
1113 * Dormant to Active status.
1115 cmd
->se_ordered_id
= atomic_inc_return(&dev
->dev_ordered_id
);
1116 smp_mb__after_atomic_inc();
1117 pr_debug("Allocated se_ordered_id: %u for Task Attr: 0x%02x on %s\n",
1118 cmd
->se_ordered_id
, cmd
->sam_task_attr
,
1119 dev
->transport
->name
);
1124 target_setup_cmd_from_cdb(struct se_cmd
*cmd
, unsigned char *cdb
)
1126 struct se_device
*dev
= cmd
->se_dev
;
1130 * Ensure that the received CDB is less than the max (252 + 8) bytes
1131 * for VARIABLE_LENGTH_CMD
1133 if (scsi_command_size(cdb
) > SCSI_MAX_VARLEN_CDB_SIZE
) {
1134 pr_err("Received SCSI CDB with command_size: %d that"
1135 " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
1136 scsi_command_size(cdb
), SCSI_MAX_VARLEN_CDB_SIZE
);
1137 return TCM_INVALID_CDB_FIELD
;
1140 * If the received CDB is larger than TCM_MAX_COMMAND_SIZE,
1141 * allocate the additional extended CDB buffer now.. Otherwise
1142 * setup the pointer from __t_task_cdb to t_task_cdb.
1144 if (scsi_command_size(cdb
) > sizeof(cmd
->__t_task_cdb
)) {
1145 cmd
->t_task_cdb
= kzalloc(scsi_command_size(cdb
),
1147 if (!cmd
->t_task_cdb
) {
1148 pr_err("Unable to allocate cmd->t_task_cdb"
1149 " %u > sizeof(cmd->__t_task_cdb): %lu ops\n",
1150 scsi_command_size(cdb
),
1151 (unsigned long)sizeof(cmd
->__t_task_cdb
));
1152 return TCM_OUT_OF_RESOURCES
;
1155 cmd
->t_task_cdb
= &cmd
->__t_task_cdb
[0];
1157 * Copy the original CDB into cmd->
1159 memcpy(cmd
->t_task_cdb
, cdb
, scsi_command_size(cdb
));
1161 trace_target_sequencer_start(cmd
);
1164 * Check for an existing UNIT ATTENTION condition
1166 ret
= target_scsi3_ua_check(cmd
);
1170 ret
= target_alua_state_check(cmd
);
1174 ret
= target_check_reservation(cmd
);
1176 cmd
->scsi_status
= SAM_STAT_RESERVATION_CONFLICT
;
1180 ret
= dev
->transport
->parse_cdb(cmd
);
1184 ret
= transport_check_alloc_task_attr(cmd
);
1188 cmd
->se_cmd_flags
|= SCF_SUPPORTED_SAM_OPCODE
;
1190 spin_lock(&cmd
->se_lun
->lun_sep_lock
);
1191 if (cmd
->se_lun
->lun_sep
)
1192 cmd
->se_lun
->lun_sep
->sep_stats
.cmd_pdus
++;
1193 spin_unlock(&cmd
->se_lun
->lun_sep_lock
);
1196 EXPORT_SYMBOL(target_setup_cmd_from_cdb
);
1199 * Used by fabric module frontends to queue tasks directly.
1200 * Many only be used from process context only
1202 int transport_handle_cdb_direct(
1209 pr_err("cmd->se_lun is NULL\n");
1212 if (in_interrupt()) {
1214 pr_err("transport_generic_handle_cdb cannot be called"
1215 " from interrupt context\n");
1219 * Set TRANSPORT_NEW_CMD state and CMD_T_ACTIVE to ensure that
1220 * outstanding descriptors are handled correctly during shutdown via
1221 * transport_wait_for_tasks()
1223 * Also, we don't take cmd->t_state_lock here as we only expect
1224 * this to be called for initial descriptor submission.
1226 cmd
->t_state
= TRANSPORT_NEW_CMD
;
1227 cmd
->transport_state
|= CMD_T_ACTIVE
;
1230 * transport_generic_new_cmd() is already handling QUEUE_FULL,
1231 * so follow TRANSPORT_NEW_CMD processing thread context usage
1232 * and call transport_generic_request_failure() if necessary..
1234 ret
= transport_generic_new_cmd(cmd
);
1236 transport_generic_request_failure(cmd
, ret
);
1239 EXPORT_SYMBOL(transport_handle_cdb_direct
);
1242 transport_generic_map_mem_to_cmd(struct se_cmd
*cmd
, struct scatterlist
*sgl
,
1243 u32 sgl_count
, struct scatterlist
*sgl_bidi
, u32 sgl_bidi_count
)
1245 if (!sgl
|| !sgl_count
)
1249 * Reject SCSI data overflow with map_mem_to_cmd() as incoming
1250 * scatterlists already have been set to follow what the fabric
1251 * passes for the original expected data transfer length.
1253 if (cmd
->se_cmd_flags
& SCF_OVERFLOW_BIT
) {
1254 pr_warn("Rejecting SCSI DATA overflow for fabric using"
1255 " SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC\n");
1256 return TCM_INVALID_CDB_FIELD
;
1259 cmd
->t_data_sg
= sgl
;
1260 cmd
->t_data_nents
= sgl_count
;
1262 if (sgl_bidi
&& sgl_bidi_count
) {
1263 cmd
->t_bidi_data_sg
= sgl_bidi
;
1264 cmd
->t_bidi_data_nents
= sgl_bidi_count
;
1266 cmd
->se_cmd_flags
|= SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC
;
1271 * target_submit_cmd_map_sgls - lookup unpacked lun and submit uninitialized
1272 * se_cmd + use pre-allocated SGL memory.
1274 * @se_cmd: command descriptor to submit
1275 * @se_sess: associated se_sess for endpoint
1276 * @cdb: pointer to SCSI CDB
1277 * @sense: pointer to SCSI sense buffer
1278 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1279 * @data_length: fabric expected data transfer length
1280 * @task_addr: SAM task attribute
1281 * @data_dir: DMA data direction
1282 * @flags: flags for command submission from target_sc_flags_tables
1283 * @sgl: struct scatterlist memory for unidirectional mapping
1284 * @sgl_count: scatterlist count for unidirectional mapping
1285 * @sgl_bidi: struct scatterlist memory for bidirectional READ mapping
1286 * @sgl_bidi_count: scatterlist count for bidirectional READ mapping
1288 * Returns non zero to signal active I/O shutdown failure. All other
1289 * setup exceptions will be returned as a SCSI CHECK_CONDITION response,
1290 * but still return zero here.
1292 * This may only be called from process context, and also currently
1293 * assumes internal allocation of fabric payload buffer by target-core.
1295 int target_submit_cmd_map_sgls(struct se_cmd
*se_cmd
, struct se_session
*se_sess
,
1296 unsigned char *cdb
, unsigned char *sense
, u32 unpacked_lun
,
1297 u32 data_length
, int task_attr
, int data_dir
, int flags
,
1298 struct scatterlist
*sgl
, u32 sgl_count
,
1299 struct scatterlist
*sgl_bidi
, u32 sgl_bidi_count
)
1301 struct se_portal_group
*se_tpg
;
1305 se_tpg
= se_sess
->se_tpg
;
1307 BUG_ON(se_cmd
->se_tfo
|| se_cmd
->se_sess
);
1308 BUG_ON(in_interrupt());
1310 * Initialize se_cmd for target operation. From this point
1311 * exceptions are handled by sending exception status via
1312 * target_core_fabric_ops->queue_status() callback
1314 transport_init_se_cmd(se_cmd
, se_tpg
->se_tpg_tfo
, se_sess
,
1315 data_length
, data_dir
, task_attr
, sense
);
1316 if (flags
& TARGET_SCF_UNKNOWN_SIZE
)
1317 se_cmd
->unknown_data_length
= 1;
1319 * Obtain struct se_cmd->cmd_kref reference and add new cmd to
1320 * se_sess->sess_cmd_list. A second kref_get here is necessary
1321 * for fabrics using TARGET_SCF_ACK_KREF that expect a second
1322 * kref_put() to happen during fabric packet acknowledgement.
1324 ret
= target_get_sess_cmd(se_sess
, se_cmd
, (flags
& TARGET_SCF_ACK_KREF
));
1328 * Signal bidirectional data payloads to target-core
1330 if (flags
& TARGET_SCF_BIDI_OP
)
1331 se_cmd
->se_cmd_flags
|= SCF_BIDI
;
1333 * Locate se_lun pointer and attach it to struct se_cmd
1335 rc
= transport_lookup_cmd_lun(se_cmd
, unpacked_lun
);
1337 transport_send_check_condition_and_sense(se_cmd
, rc
, 0);
1338 target_put_sess_cmd(se_sess
, se_cmd
);
1342 rc
= target_setup_cmd_from_cdb(se_cmd
, cdb
);
1344 transport_generic_request_failure(se_cmd
, rc
);
1348 * When a non zero sgl_count has been passed perform SGL passthrough
1349 * mapping for pre-allocated fabric memory instead of having target
1350 * core perform an internal SGL allocation..
1352 if (sgl_count
!= 0) {
1356 * A work-around for tcm_loop as some userspace code via
1357 * scsi-generic do not memset their associated read buffers,
1358 * so go ahead and do that here for type non-data CDBs. Also
1359 * note that this is currently guaranteed to be a single SGL
1360 * for this case by target core in target_setup_cmd_from_cdb()
1361 * -> transport_generic_cmd_sequencer().
1363 if (!(se_cmd
->se_cmd_flags
& SCF_SCSI_DATA_CDB
) &&
1364 se_cmd
->data_direction
== DMA_FROM_DEVICE
) {
1365 unsigned char *buf
= NULL
;
1368 buf
= kmap(sg_page(sgl
)) + sgl
->offset
;
1371 memset(buf
, 0, sgl
->length
);
1372 kunmap(sg_page(sgl
));
1376 rc
= transport_generic_map_mem_to_cmd(se_cmd
, sgl
, sgl_count
,
1377 sgl_bidi
, sgl_bidi_count
);
1379 transport_generic_request_failure(se_cmd
, rc
);
1384 * Check if we need to delay processing because of ALUA
1385 * Active/NonOptimized primary access state..
1387 core_alua_check_nonop_delay(se_cmd
);
1389 transport_handle_cdb_direct(se_cmd
);
1392 EXPORT_SYMBOL(target_submit_cmd_map_sgls
);
1395 * target_submit_cmd - lookup unpacked lun and submit uninitialized se_cmd
1397 * @se_cmd: command descriptor to submit
1398 * @se_sess: associated se_sess for endpoint
1399 * @cdb: pointer to SCSI CDB
1400 * @sense: pointer to SCSI sense buffer
1401 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1402 * @data_length: fabric expected data transfer length
1403 * @task_addr: SAM task attribute
1404 * @data_dir: DMA data direction
1405 * @flags: flags for command submission from target_sc_flags_tables
1407 * Returns non zero to signal active I/O shutdown failure. All other
1408 * setup exceptions will be returned as a SCSI CHECK_CONDITION response,
1409 * but still return zero here.
1411 * This may only be called from process context, and also currently
1412 * assumes internal allocation of fabric payload buffer by target-core.
1414 * It also assumes interal target core SGL memory allocation.
1416 int target_submit_cmd(struct se_cmd
*se_cmd
, struct se_session
*se_sess
,
1417 unsigned char *cdb
, unsigned char *sense
, u32 unpacked_lun
,
1418 u32 data_length
, int task_attr
, int data_dir
, int flags
)
1420 return target_submit_cmd_map_sgls(se_cmd
, se_sess
, cdb
, sense
,
1421 unpacked_lun
, data_length
, task_attr
, data_dir
,
1422 flags
, NULL
, 0, NULL
, 0);
1424 EXPORT_SYMBOL(target_submit_cmd
);
1426 static void target_complete_tmr_failure(struct work_struct
*work
)
1428 struct se_cmd
*se_cmd
= container_of(work
, struct se_cmd
, work
);
1430 se_cmd
->se_tmr_req
->response
= TMR_LUN_DOES_NOT_EXIST
;
1431 se_cmd
->se_tfo
->queue_tm_rsp(se_cmd
);
1433 transport_cmd_check_stop_to_fabric(se_cmd
);
1437 * target_submit_tmr - lookup unpacked lun and submit uninitialized se_cmd
1440 * @se_cmd: command descriptor to submit
1441 * @se_sess: associated se_sess for endpoint
1442 * @sense: pointer to SCSI sense buffer
1443 * @unpacked_lun: unpacked LUN to reference for struct se_lun
1444 * @fabric_context: fabric context for TMR req
1445 * @tm_type: Type of TM request
1446 * @gfp: gfp type for caller
1447 * @tag: referenced task tag for TMR_ABORT_TASK
1448 * @flags: submit cmd flags
1450 * Callable from all contexts.
1453 int target_submit_tmr(struct se_cmd
*se_cmd
, struct se_session
*se_sess
,
1454 unsigned char *sense
, u32 unpacked_lun
,
1455 void *fabric_tmr_ptr
, unsigned char tm_type
,
1456 gfp_t gfp
, unsigned int tag
, int flags
)
1458 struct se_portal_group
*se_tpg
;
1461 se_tpg
= se_sess
->se_tpg
;
1464 transport_init_se_cmd(se_cmd
, se_tpg
->se_tpg_tfo
, se_sess
,
1465 0, DMA_NONE
, MSG_SIMPLE_TAG
, sense
);
1467 * FIXME: Currently expect caller to handle se_cmd->se_tmr_req
1468 * allocation failure.
1470 ret
= core_tmr_alloc_req(se_cmd
, fabric_tmr_ptr
, tm_type
, gfp
);
1474 if (tm_type
== TMR_ABORT_TASK
)
1475 se_cmd
->se_tmr_req
->ref_task_tag
= tag
;
1477 /* See target_submit_cmd for commentary */
1478 ret
= target_get_sess_cmd(se_sess
, se_cmd
, (flags
& TARGET_SCF_ACK_KREF
));
1480 core_tmr_release_req(se_cmd
->se_tmr_req
);
1484 ret
= transport_lookup_tmr_lun(se_cmd
, unpacked_lun
);
1487 * For callback during failure handling, push this work off
1488 * to process context with TMR_LUN_DOES_NOT_EXIST status.
1490 INIT_WORK(&se_cmd
->work
, target_complete_tmr_failure
);
1491 schedule_work(&se_cmd
->work
);
1494 transport_generic_handle_tmr(se_cmd
);
1497 EXPORT_SYMBOL(target_submit_tmr
);
1500 * If the cmd is active, request it to be stopped and sleep until it
1503 bool target_stop_cmd(struct se_cmd
*cmd
, unsigned long *flags
)
1505 bool was_active
= false;
1507 if (cmd
->transport_state
& CMD_T_BUSY
) {
1508 cmd
->transport_state
|= CMD_T_REQUEST_STOP
;
1509 spin_unlock_irqrestore(&cmd
->t_state_lock
, *flags
);
1511 pr_debug("cmd %p waiting to complete\n", cmd
);
1512 wait_for_completion(&cmd
->task_stop_comp
);
1513 pr_debug("cmd %p stopped successfully\n", cmd
);
1515 spin_lock_irqsave(&cmd
->t_state_lock
, *flags
);
1516 cmd
->transport_state
&= ~CMD_T_REQUEST_STOP
;
1517 cmd
->transport_state
&= ~CMD_T_BUSY
;
1525 * Handle SAM-esque emulation for generic transport request failures.
1527 void transport_generic_request_failure(struct se_cmd
*cmd
,
1528 sense_reason_t sense_reason
)
1532 pr_debug("-----[ Storage Engine Exception for cmd: %p ITT: 0x%08x"
1533 " CDB: 0x%02x\n", cmd
, cmd
->se_tfo
->get_task_tag(cmd
),
1534 cmd
->t_task_cdb
[0]);
1535 pr_debug("-----[ i_state: %d t_state: %d sense_reason: %d\n",
1536 cmd
->se_tfo
->get_cmd_state(cmd
),
1537 cmd
->t_state
, sense_reason
);
1538 pr_debug("-----[ CMD_T_ACTIVE: %d CMD_T_STOP: %d CMD_T_SENT: %d\n",
1539 (cmd
->transport_state
& CMD_T_ACTIVE
) != 0,
1540 (cmd
->transport_state
& CMD_T_STOP
) != 0,
1541 (cmd
->transport_state
& CMD_T_SENT
) != 0);
1544 * For SAM Task Attribute emulation for failed struct se_cmd
1546 transport_complete_task_attr(cmd
);
1548 * Handle special case for COMPARE_AND_WRITE failure, where the
1549 * callback is expected to drop the per device ->caw_mutex.
1551 if ((cmd
->se_cmd_flags
& SCF_COMPARE_AND_WRITE
) &&
1552 cmd
->transport_complete_callback
)
1553 cmd
->transport_complete_callback(cmd
);
1555 switch (sense_reason
) {
1556 case TCM_NON_EXISTENT_LUN
:
1557 case TCM_UNSUPPORTED_SCSI_OPCODE
:
1558 case TCM_INVALID_CDB_FIELD
:
1559 case TCM_INVALID_PARAMETER_LIST
:
1560 case TCM_PARAMETER_LIST_LENGTH_ERROR
:
1561 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
:
1562 case TCM_UNKNOWN_MODE_PAGE
:
1563 case TCM_WRITE_PROTECTED
:
1564 case TCM_ADDRESS_OUT_OF_RANGE
:
1565 case TCM_CHECK_CONDITION_ABORT_CMD
:
1566 case TCM_CHECK_CONDITION_UNIT_ATTENTION
:
1567 case TCM_CHECK_CONDITION_NOT_READY
:
1569 case TCM_OUT_OF_RESOURCES
:
1570 sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1572 case TCM_RESERVATION_CONFLICT
:
1574 * No SENSE Data payload for this case, set SCSI Status
1575 * and queue the response to $FABRIC_MOD.
1577 * Uses linux/include/scsi/scsi.h SAM status codes defs
1579 cmd
->scsi_status
= SAM_STAT_RESERVATION_CONFLICT
;
1581 * For UA Interlock Code 11b, a RESERVATION CONFLICT will
1582 * establish a UNIT ATTENTION with PREVIOUS RESERVATION
1585 * See spc4r17, section 7.4.6 Control Mode Page, Table 349
1588 cmd
->se_dev
->dev_attrib
.emulate_ua_intlck_ctrl
== 2)
1589 core_scsi3_ua_allocate(cmd
->se_sess
->se_node_acl
,
1590 cmd
->orig_fe_lun
, 0x2C,
1591 ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS
);
1593 trace_target_cmd_complete(cmd
);
1594 ret
= cmd
->se_tfo
-> queue_status(cmd
);
1595 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
1599 pr_err("Unknown transport error for CDB 0x%02x: %d\n",
1600 cmd
->t_task_cdb
[0], sense_reason
);
1601 sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
1605 ret
= transport_send_check_condition_and_sense(cmd
, sense_reason
, 0);
1606 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
1610 transport_lun_remove_cmd(cmd
);
1611 if (!transport_cmd_check_stop_to_fabric(cmd
))
1616 cmd
->t_state
= TRANSPORT_COMPLETE_QF_OK
;
1617 transport_handle_queue_full(cmd
, cmd
->se_dev
);
1619 EXPORT_SYMBOL(transport_generic_request_failure
);
1621 void __target_execute_cmd(struct se_cmd
*cmd
)
1625 if (cmd
->execute_cmd
) {
1626 ret
= cmd
->execute_cmd(cmd
);
1628 spin_lock_irq(&cmd
->t_state_lock
);
1629 cmd
->transport_state
&= ~(CMD_T_BUSY
|CMD_T_SENT
);
1630 spin_unlock_irq(&cmd
->t_state_lock
);
1632 transport_generic_request_failure(cmd
, ret
);
1637 static bool target_handle_task_attr(struct se_cmd
*cmd
)
1639 struct se_device
*dev
= cmd
->se_dev
;
1641 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1645 * Check for the existence of HEAD_OF_QUEUE, and if true return 1
1646 * to allow the passed struct se_cmd list of tasks to the front of the list.
1648 switch (cmd
->sam_task_attr
) {
1650 pr_debug("Added HEAD_OF_QUEUE for CDB: 0x%02x, "
1651 "se_ordered_id: %u\n",
1652 cmd
->t_task_cdb
[0], cmd
->se_ordered_id
);
1654 case MSG_ORDERED_TAG
:
1655 atomic_inc(&dev
->dev_ordered_sync
);
1656 smp_mb__after_atomic_inc();
1658 pr_debug("Added ORDERED for CDB: 0x%02x to ordered list, "
1659 " se_ordered_id: %u\n",
1660 cmd
->t_task_cdb
[0], cmd
->se_ordered_id
);
1663 * Execute an ORDERED command if no other older commands
1664 * exist that need to be completed first.
1666 if (!atomic_read(&dev
->simple_cmds
))
1671 * For SIMPLE and UNTAGGED Task Attribute commands
1673 atomic_inc(&dev
->simple_cmds
);
1674 smp_mb__after_atomic_inc();
1678 if (atomic_read(&dev
->dev_ordered_sync
) == 0)
1681 spin_lock(&dev
->delayed_cmd_lock
);
1682 list_add_tail(&cmd
->se_delayed_node
, &dev
->delayed_cmd_list
);
1683 spin_unlock(&dev
->delayed_cmd_lock
);
1685 pr_debug("Added CDB: 0x%02x Task Attr: 0x%02x to"
1686 " delayed CMD list, se_ordered_id: %u\n",
1687 cmd
->t_task_cdb
[0], cmd
->sam_task_attr
,
1688 cmd
->se_ordered_id
);
1692 void target_execute_cmd(struct se_cmd
*cmd
)
1695 * If the received CDB has aleady been aborted stop processing it here.
1697 if (transport_check_aborted_status(cmd
, 1))
1701 * Determine if frontend context caller is requesting the stopping of
1702 * this command for frontend exceptions.
1704 spin_lock_irq(&cmd
->t_state_lock
);
1705 if (cmd
->transport_state
& CMD_T_STOP
) {
1706 pr_debug("%s:%d CMD_T_STOP for ITT: 0x%08x\n",
1708 cmd
->se_tfo
->get_task_tag(cmd
));
1710 spin_unlock_irq(&cmd
->t_state_lock
);
1711 complete(&cmd
->t_transport_stop_comp
);
1715 cmd
->t_state
= TRANSPORT_PROCESSING
;
1716 cmd
->transport_state
|= CMD_T_ACTIVE
|CMD_T_BUSY
|CMD_T_SENT
;
1717 spin_unlock_irq(&cmd
->t_state_lock
);
1719 if (target_handle_task_attr(cmd
)) {
1720 spin_lock_irq(&cmd
->t_state_lock
);
1721 cmd
->transport_state
&= ~CMD_T_BUSY
|CMD_T_SENT
;
1722 spin_unlock_irq(&cmd
->t_state_lock
);
1726 __target_execute_cmd(cmd
);
1728 EXPORT_SYMBOL(target_execute_cmd
);
1731 * Process all commands up to the last received ORDERED task attribute which
1732 * requires another blocking boundary
1734 static void target_restart_delayed_cmds(struct se_device
*dev
)
1739 spin_lock(&dev
->delayed_cmd_lock
);
1740 if (list_empty(&dev
->delayed_cmd_list
)) {
1741 spin_unlock(&dev
->delayed_cmd_lock
);
1745 cmd
= list_entry(dev
->delayed_cmd_list
.next
,
1746 struct se_cmd
, se_delayed_node
);
1747 list_del(&cmd
->se_delayed_node
);
1748 spin_unlock(&dev
->delayed_cmd_lock
);
1750 __target_execute_cmd(cmd
);
1752 if (cmd
->sam_task_attr
== MSG_ORDERED_TAG
)
1758 * Called from I/O completion to determine which dormant/delayed
1759 * and ordered cmds need to have their tasks added to the execution queue.
1761 static void transport_complete_task_attr(struct se_cmd
*cmd
)
1763 struct se_device
*dev
= cmd
->se_dev
;
1765 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
)
1768 if (cmd
->sam_task_attr
== MSG_SIMPLE_TAG
) {
1769 atomic_dec(&dev
->simple_cmds
);
1770 smp_mb__after_atomic_dec();
1771 dev
->dev_cur_ordered_id
++;
1772 pr_debug("Incremented dev->dev_cur_ordered_id: %u for"
1773 " SIMPLE: %u\n", dev
->dev_cur_ordered_id
,
1774 cmd
->se_ordered_id
);
1775 } else if (cmd
->sam_task_attr
== MSG_HEAD_TAG
) {
1776 dev
->dev_cur_ordered_id
++;
1777 pr_debug("Incremented dev_cur_ordered_id: %u for"
1778 " HEAD_OF_QUEUE: %u\n", dev
->dev_cur_ordered_id
,
1779 cmd
->se_ordered_id
);
1780 } else if (cmd
->sam_task_attr
== MSG_ORDERED_TAG
) {
1781 atomic_dec(&dev
->dev_ordered_sync
);
1782 smp_mb__after_atomic_dec();
1784 dev
->dev_cur_ordered_id
++;
1785 pr_debug("Incremented dev_cur_ordered_id: %u for ORDERED:"
1786 " %u\n", dev
->dev_cur_ordered_id
, cmd
->se_ordered_id
);
1789 target_restart_delayed_cmds(dev
);
1792 static void transport_complete_qf(struct se_cmd
*cmd
)
1796 transport_complete_task_attr(cmd
);
1798 if (cmd
->se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) {
1799 trace_target_cmd_complete(cmd
);
1800 ret
= cmd
->se_tfo
->queue_status(cmd
);
1805 switch (cmd
->data_direction
) {
1806 case DMA_FROM_DEVICE
:
1807 trace_target_cmd_complete(cmd
);
1808 ret
= cmd
->se_tfo
->queue_data_in(cmd
);
1811 if (cmd
->se_cmd_flags
& SCF_BIDI
) {
1812 ret
= cmd
->se_tfo
->queue_data_in(cmd
);
1816 /* Fall through for DMA_TO_DEVICE */
1818 trace_target_cmd_complete(cmd
);
1819 ret
= cmd
->se_tfo
->queue_status(cmd
);
1827 transport_handle_queue_full(cmd
, cmd
->se_dev
);
1830 transport_lun_remove_cmd(cmd
);
1831 transport_cmd_check_stop_to_fabric(cmd
);
1834 static void transport_handle_queue_full(
1836 struct se_device
*dev
)
1838 spin_lock_irq(&dev
->qf_cmd_lock
);
1839 list_add_tail(&cmd
->se_qf_node
, &cmd
->se_dev
->qf_cmd_list
);
1840 atomic_inc(&dev
->dev_qf_count
);
1841 smp_mb__after_atomic_inc();
1842 spin_unlock_irq(&cmd
->se_dev
->qf_cmd_lock
);
1844 schedule_work(&cmd
->se_dev
->qf_work_queue
);
1847 static void target_complete_ok_work(struct work_struct
*work
)
1849 struct se_cmd
*cmd
= container_of(work
, struct se_cmd
, work
);
1853 * Check if we need to move delayed/dormant tasks from cmds on the
1854 * delayed execution list after a HEAD_OF_QUEUE or ORDERED Task
1857 transport_complete_task_attr(cmd
);
1860 * Check to schedule QUEUE_FULL work, or execute an existing
1861 * cmd->transport_qf_callback()
1863 if (atomic_read(&cmd
->se_dev
->dev_qf_count
) != 0)
1864 schedule_work(&cmd
->se_dev
->qf_work_queue
);
1867 * Check if we need to send a sense buffer from
1868 * the struct se_cmd in question.
1870 if (cmd
->se_cmd_flags
& SCF_TRANSPORT_TASK_SENSE
) {
1871 WARN_ON(!cmd
->scsi_status
);
1872 ret
= transport_send_check_condition_and_sense(
1874 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
1877 transport_lun_remove_cmd(cmd
);
1878 transport_cmd_check_stop_to_fabric(cmd
);
1882 * Check for a callback, used by amongst other things
1883 * XDWRITE_READ_10 and COMPARE_AND_WRITE emulation.
1885 if (cmd
->transport_complete_callback
) {
1888 rc
= cmd
->transport_complete_callback(cmd
);
1889 if (!rc
&& !(cmd
->se_cmd_flags
& SCF_COMPARE_AND_WRITE_POST
)) {
1892 ret
= transport_send_check_condition_and_sense(cmd
,
1894 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
1897 transport_lun_remove_cmd(cmd
);
1898 transport_cmd_check_stop_to_fabric(cmd
);
1903 switch (cmd
->data_direction
) {
1904 case DMA_FROM_DEVICE
:
1905 spin_lock(&cmd
->se_lun
->lun_sep_lock
);
1906 if (cmd
->se_lun
->lun_sep
) {
1907 cmd
->se_lun
->lun_sep
->sep_stats
.tx_data_octets
+=
1910 spin_unlock(&cmd
->se_lun
->lun_sep_lock
);
1912 trace_target_cmd_complete(cmd
);
1913 ret
= cmd
->se_tfo
->queue_data_in(cmd
);
1914 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
1918 spin_lock(&cmd
->se_lun
->lun_sep_lock
);
1919 if (cmd
->se_lun
->lun_sep
) {
1920 cmd
->se_lun
->lun_sep
->sep_stats
.rx_data_octets
+=
1923 spin_unlock(&cmd
->se_lun
->lun_sep_lock
);
1925 * Check if we need to send READ payload for BIDI-COMMAND
1927 if (cmd
->se_cmd_flags
& SCF_BIDI
) {
1928 spin_lock(&cmd
->se_lun
->lun_sep_lock
);
1929 if (cmd
->se_lun
->lun_sep
) {
1930 cmd
->se_lun
->lun_sep
->sep_stats
.tx_data_octets
+=
1933 spin_unlock(&cmd
->se_lun
->lun_sep_lock
);
1934 ret
= cmd
->se_tfo
->queue_data_in(cmd
);
1935 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
1939 /* Fall through for DMA_TO_DEVICE */
1941 trace_target_cmd_complete(cmd
);
1942 ret
= cmd
->se_tfo
->queue_status(cmd
);
1943 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
1950 transport_lun_remove_cmd(cmd
);
1951 transport_cmd_check_stop_to_fabric(cmd
);
1955 pr_debug("Handling complete_ok QUEUE_FULL: se_cmd: %p,"
1956 " data_direction: %d\n", cmd
, cmd
->data_direction
);
1957 cmd
->t_state
= TRANSPORT_COMPLETE_QF_OK
;
1958 transport_handle_queue_full(cmd
, cmd
->se_dev
);
1961 static inline void transport_free_sgl(struct scatterlist
*sgl
, int nents
)
1963 struct scatterlist
*sg
;
1966 for_each_sg(sgl
, sg
, nents
, count
)
1967 __free_page(sg_page(sg
));
1972 static inline void transport_reset_sgl_orig(struct se_cmd
*cmd
)
1975 * Check for saved t_data_sg that may be used for COMPARE_AND_WRITE
1976 * emulation, and free + reset pointers if necessary..
1978 if (!cmd
->t_data_sg_orig
)
1981 kfree(cmd
->t_data_sg
);
1982 cmd
->t_data_sg
= cmd
->t_data_sg_orig
;
1983 cmd
->t_data_sg_orig
= NULL
;
1984 cmd
->t_data_nents
= cmd
->t_data_nents_orig
;
1985 cmd
->t_data_nents_orig
= 0;
1988 static inline void transport_free_pages(struct se_cmd
*cmd
)
1990 if (cmd
->se_cmd_flags
& SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC
) {
1991 transport_reset_sgl_orig(cmd
);
1994 transport_reset_sgl_orig(cmd
);
1996 transport_free_sgl(cmd
->t_data_sg
, cmd
->t_data_nents
);
1997 cmd
->t_data_sg
= NULL
;
1998 cmd
->t_data_nents
= 0;
2000 transport_free_sgl(cmd
->t_bidi_data_sg
, cmd
->t_bidi_data_nents
);
2001 cmd
->t_bidi_data_sg
= NULL
;
2002 cmd
->t_bidi_data_nents
= 0;
2006 * transport_release_cmd - free a command
2007 * @cmd: command to free
2009 * This routine unconditionally frees a command, and reference counting
2010 * or list removal must be done in the caller.
2012 static int transport_release_cmd(struct se_cmd
*cmd
)
2014 BUG_ON(!cmd
->se_tfo
);
2016 if (cmd
->se_cmd_flags
& SCF_SCSI_TMR_CDB
)
2017 core_tmr_release_req(cmd
->se_tmr_req
);
2018 if (cmd
->t_task_cdb
!= cmd
->__t_task_cdb
)
2019 kfree(cmd
->t_task_cdb
);
2021 * If this cmd has been setup with target_get_sess_cmd(), drop
2022 * the kref and call ->release_cmd() in kref callback.
2024 return target_put_sess_cmd(cmd
->se_sess
, cmd
);
2028 * transport_put_cmd - release a reference to a command
2029 * @cmd: command to release
2031 * This routine releases our reference to the command and frees it if possible.
2033 static int transport_put_cmd(struct se_cmd
*cmd
)
2035 transport_free_pages(cmd
);
2036 return transport_release_cmd(cmd
);
2039 void *transport_kmap_data_sg(struct se_cmd
*cmd
)
2041 struct scatterlist
*sg
= cmd
->t_data_sg
;
2042 struct page
**pages
;
2046 * We need to take into account a possible offset here for fabrics like
2047 * tcm_loop who may be using a contig buffer from the SCSI midlayer for
2048 * control CDBs passed as SGLs via transport_generic_map_mem_to_cmd()
2050 if (!cmd
->t_data_nents
)
2054 if (cmd
->t_data_nents
== 1)
2055 return kmap(sg_page(sg
)) + sg
->offset
;
2057 /* >1 page. use vmap */
2058 pages
= kmalloc(sizeof(*pages
) * cmd
->t_data_nents
, GFP_KERNEL
);
2062 /* convert sg[] to pages[] */
2063 for_each_sg(cmd
->t_data_sg
, sg
, cmd
->t_data_nents
, i
) {
2064 pages
[i
] = sg_page(sg
);
2067 cmd
->t_data_vmap
= vmap(pages
, cmd
->t_data_nents
, VM_MAP
, PAGE_KERNEL
);
2069 if (!cmd
->t_data_vmap
)
2072 return cmd
->t_data_vmap
+ cmd
->t_data_sg
[0].offset
;
2074 EXPORT_SYMBOL(transport_kmap_data_sg
);
2076 void transport_kunmap_data_sg(struct se_cmd
*cmd
)
2078 if (!cmd
->t_data_nents
) {
2080 } else if (cmd
->t_data_nents
== 1) {
2081 kunmap(sg_page(cmd
->t_data_sg
));
2085 vunmap(cmd
->t_data_vmap
);
2086 cmd
->t_data_vmap
= NULL
;
2088 EXPORT_SYMBOL(transport_kunmap_data_sg
);
2091 target_alloc_sgl(struct scatterlist
**sgl
, unsigned int *nents
, u32 length
,
2094 struct scatterlist
*sg
;
2096 gfp_t zero_flag
= (zero_page
) ? __GFP_ZERO
: 0;
2100 nent
= DIV_ROUND_UP(length
, PAGE_SIZE
);
2101 sg
= kmalloc(sizeof(struct scatterlist
) * nent
, GFP_KERNEL
);
2105 sg_init_table(sg
, nent
);
2108 u32 page_len
= min_t(u32
, length
, PAGE_SIZE
);
2109 page
= alloc_page(GFP_KERNEL
| zero_flag
);
2113 sg_set_page(&sg
[i
], page
, page_len
, 0);
2124 __free_page(sg_page(&sg
[i
]));
2131 * Allocate any required resources to execute the command. For writes we
2132 * might not have the payload yet, so notify the fabric via a call to
2133 * ->write_pending instead. Otherwise place it on the execution queue.
2136 transport_generic_new_cmd(struct se_cmd
*cmd
)
2141 * Determine is the TCM fabric module has already allocated physical
2142 * memory, and is directly calling transport_generic_map_mem_to_cmd()
2145 if (!(cmd
->se_cmd_flags
& SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC
) &&
2147 bool zero_flag
= !(cmd
->se_cmd_flags
& SCF_SCSI_DATA_CDB
);
2149 if ((cmd
->se_cmd_flags
& SCF_BIDI
) ||
2150 (cmd
->se_cmd_flags
& SCF_COMPARE_AND_WRITE
)) {
2153 if (cmd
->se_cmd_flags
& SCF_COMPARE_AND_WRITE
)
2154 bidi_length
= cmd
->t_task_nolb
*
2155 cmd
->se_dev
->dev_attrib
.block_size
;
2157 bidi_length
= cmd
->data_length
;
2159 ret
= target_alloc_sgl(&cmd
->t_bidi_data_sg
,
2160 &cmd
->t_bidi_data_nents
,
2161 bidi_length
, zero_flag
);
2163 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2166 ret
= target_alloc_sgl(&cmd
->t_data_sg
, &cmd
->t_data_nents
,
2167 cmd
->data_length
, zero_flag
);
2169 return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2172 * If this command is not a write we can execute it right here,
2173 * for write buffers we need to notify the fabric driver first
2174 * and let it call back once the write buffers are ready.
2176 target_add_to_state_list(cmd
);
2177 if (cmd
->data_direction
!= DMA_TO_DEVICE
) {
2178 target_execute_cmd(cmd
);
2181 transport_cmd_check_stop(cmd
, false, true);
2183 ret
= cmd
->se_tfo
->write_pending(cmd
);
2184 if (ret
== -EAGAIN
|| ret
== -ENOMEM
)
2187 /* fabric drivers should only return -EAGAIN or -ENOMEM as error */
2190 return (!ret
) ? 0 : TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2193 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n", cmd
);
2194 cmd
->t_state
= TRANSPORT_COMPLETE_QF_WP
;
2195 transport_handle_queue_full(cmd
, cmd
->se_dev
);
2198 EXPORT_SYMBOL(transport_generic_new_cmd
);
2200 static void transport_write_pending_qf(struct se_cmd
*cmd
)
2204 ret
= cmd
->se_tfo
->write_pending(cmd
);
2205 if (ret
== -EAGAIN
|| ret
== -ENOMEM
) {
2206 pr_debug("Handling write_pending QUEUE__FULL: se_cmd: %p\n",
2208 transport_handle_queue_full(cmd
, cmd
->se_dev
);
2212 int transport_generic_free_cmd(struct se_cmd
*cmd
, int wait_for_tasks
)
2214 unsigned long flags
;
2217 if (!(cmd
->se_cmd_flags
& SCF_SE_LUN_CMD
)) {
2218 if (wait_for_tasks
&& (cmd
->se_cmd_flags
& SCF_SCSI_TMR_CDB
))
2219 transport_wait_for_tasks(cmd
);
2221 ret
= transport_release_cmd(cmd
);
2224 transport_wait_for_tasks(cmd
);
2226 * Handle WRITE failure case where transport_generic_new_cmd()
2227 * has already added se_cmd to state_list, but fabric has
2228 * failed command before I/O submission.
2230 if (cmd
->state_active
) {
2231 spin_lock_irqsave(&cmd
->t_state_lock
, flags
);
2232 target_remove_from_state_list(cmd
);
2233 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2237 transport_lun_remove_cmd(cmd
);
2239 ret
= transport_put_cmd(cmd
);
2243 EXPORT_SYMBOL(transport_generic_free_cmd
);
2245 /* target_get_sess_cmd - Add command to active ->sess_cmd_list
2246 * @se_sess: session to reference
2247 * @se_cmd: command descriptor to add
2248 * @ack_kref: Signal that fabric will perform an ack target_put_sess_cmd()
2250 int target_get_sess_cmd(struct se_session
*se_sess
, struct se_cmd
*se_cmd
,
2253 unsigned long flags
;
2256 kref_init(&se_cmd
->cmd_kref
);
2258 * Add a second kref if the fabric caller is expecting to handle
2259 * fabric acknowledgement that requires two target_put_sess_cmd()
2260 * invocations before se_cmd descriptor release.
2262 if (ack_kref
== true) {
2263 kref_get(&se_cmd
->cmd_kref
);
2264 se_cmd
->se_cmd_flags
|= SCF_ACK_KREF
;
2267 spin_lock_irqsave(&se_sess
->sess_cmd_lock
, flags
);
2268 if (se_sess
->sess_tearing_down
) {
2272 list_add_tail(&se_cmd
->se_cmd_list
, &se_sess
->sess_cmd_list
);
2274 spin_unlock_irqrestore(&se_sess
->sess_cmd_lock
, flags
);
2277 EXPORT_SYMBOL(target_get_sess_cmd
);
2279 static void target_release_cmd_kref(struct kref
*kref
)
2281 struct se_cmd
*se_cmd
= container_of(kref
, struct se_cmd
, cmd_kref
);
2282 struct se_session
*se_sess
= se_cmd
->se_sess
;
2284 if (list_empty(&se_cmd
->se_cmd_list
)) {
2285 spin_unlock(&se_sess
->sess_cmd_lock
);
2286 se_cmd
->se_tfo
->release_cmd(se_cmd
);
2289 if (se_sess
->sess_tearing_down
&& se_cmd
->cmd_wait_set
) {
2290 spin_unlock(&se_sess
->sess_cmd_lock
);
2291 complete(&se_cmd
->cmd_wait_comp
);
2294 list_del(&se_cmd
->se_cmd_list
);
2295 spin_unlock(&se_sess
->sess_cmd_lock
);
2297 se_cmd
->se_tfo
->release_cmd(se_cmd
);
2300 /* target_put_sess_cmd - Check for active I/O shutdown via kref_put
2301 * @se_sess: session to reference
2302 * @se_cmd: command descriptor to drop
2304 int target_put_sess_cmd(struct se_session
*se_sess
, struct se_cmd
*se_cmd
)
2306 return kref_put_spinlock_irqsave(&se_cmd
->cmd_kref
, target_release_cmd_kref
,
2307 &se_sess
->sess_cmd_lock
);
2309 EXPORT_SYMBOL(target_put_sess_cmd
);
2311 /* target_sess_cmd_list_set_waiting - Flag all commands in
2312 * sess_cmd_list to complete cmd_wait_comp. Set
2313 * sess_tearing_down so no more commands are queued.
2314 * @se_sess: session to flag
2316 void target_sess_cmd_list_set_waiting(struct se_session
*se_sess
)
2318 struct se_cmd
*se_cmd
;
2319 unsigned long flags
;
2321 spin_lock_irqsave(&se_sess
->sess_cmd_lock
, flags
);
2322 if (se_sess
->sess_tearing_down
) {
2323 spin_unlock_irqrestore(&se_sess
->sess_cmd_lock
, flags
);
2326 se_sess
->sess_tearing_down
= 1;
2327 list_splice_init(&se_sess
->sess_cmd_list
, &se_sess
->sess_wait_list
);
2329 list_for_each_entry(se_cmd
, &se_sess
->sess_wait_list
, se_cmd_list
)
2330 se_cmd
->cmd_wait_set
= 1;
2332 spin_unlock_irqrestore(&se_sess
->sess_cmd_lock
, flags
);
2334 EXPORT_SYMBOL(target_sess_cmd_list_set_waiting
);
2336 /* target_wait_for_sess_cmds - Wait for outstanding descriptors
2337 * @se_sess: session to wait for active I/O
2339 void target_wait_for_sess_cmds(struct se_session
*se_sess
)
2341 struct se_cmd
*se_cmd
, *tmp_cmd
;
2342 unsigned long flags
;
2344 list_for_each_entry_safe(se_cmd
, tmp_cmd
,
2345 &se_sess
->sess_wait_list
, se_cmd_list
) {
2346 list_del(&se_cmd
->se_cmd_list
);
2348 pr_debug("Waiting for se_cmd: %p t_state: %d, fabric state:"
2349 " %d\n", se_cmd
, se_cmd
->t_state
,
2350 se_cmd
->se_tfo
->get_cmd_state(se_cmd
));
2352 wait_for_completion(&se_cmd
->cmd_wait_comp
);
2353 pr_debug("After cmd_wait_comp: se_cmd: %p t_state: %d"
2354 " fabric state: %d\n", se_cmd
, se_cmd
->t_state
,
2355 se_cmd
->se_tfo
->get_cmd_state(se_cmd
));
2357 se_cmd
->se_tfo
->release_cmd(se_cmd
);
2360 spin_lock_irqsave(&se_sess
->sess_cmd_lock
, flags
);
2361 WARN_ON(!list_empty(&se_sess
->sess_cmd_list
));
2362 spin_unlock_irqrestore(&se_sess
->sess_cmd_lock
, flags
);
2365 EXPORT_SYMBOL(target_wait_for_sess_cmds
);
2367 static int transport_clear_lun_ref_thread(void *p
)
2369 struct se_lun
*lun
= p
;
2371 percpu_ref_kill(&lun
->lun_ref
);
2373 wait_for_completion(&lun
->lun_ref_comp
);
2374 complete(&lun
->lun_shutdown_comp
);
2379 int transport_clear_lun_ref(struct se_lun
*lun
)
2381 struct task_struct
*kt
;
2383 kt
= kthread_run(transport_clear_lun_ref_thread
, lun
,
2384 "tcm_cl_%u", lun
->unpacked_lun
);
2386 pr_err("Unable to start clear_lun thread\n");
2389 wait_for_completion(&lun
->lun_shutdown_comp
);
2395 * transport_wait_for_tasks - wait for completion to occur
2396 * @cmd: command to wait
2398 * Called from frontend fabric context to wait for storage engine
2399 * to pause and/or release frontend generated struct se_cmd.
2401 bool transport_wait_for_tasks(struct se_cmd
*cmd
)
2403 unsigned long flags
;
2405 spin_lock_irqsave(&cmd
->t_state_lock
, flags
);
2406 if (!(cmd
->se_cmd_flags
& SCF_SE_LUN_CMD
) &&
2407 !(cmd
->se_cmd_flags
& SCF_SCSI_TMR_CDB
)) {
2408 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2412 if (!(cmd
->se_cmd_flags
& SCF_SUPPORTED_SAM_OPCODE
) &&
2413 !(cmd
->se_cmd_flags
& SCF_SCSI_TMR_CDB
)) {
2414 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2418 if (!(cmd
->transport_state
& CMD_T_ACTIVE
)) {
2419 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2423 cmd
->transport_state
|= CMD_T_STOP
;
2425 pr_debug("wait_for_tasks: Stopping %p ITT: 0x%08x"
2426 " i_state: %d, t_state: %d, CMD_T_STOP\n",
2427 cmd
, cmd
->se_tfo
->get_task_tag(cmd
),
2428 cmd
->se_tfo
->get_cmd_state(cmd
), cmd
->t_state
);
2430 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2432 wait_for_completion(&cmd
->t_transport_stop_comp
);
2434 spin_lock_irqsave(&cmd
->t_state_lock
, flags
);
2435 cmd
->transport_state
&= ~(CMD_T_ACTIVE
| CMD_T_STOP
);
2437 pr_debug("wait_for_tasks: Stopped wait_for_completion("
2438 "&cmd->t_transport_stop_comp) for ITT: 0x%08x\n",
2439 cmd
->se_tfo
->get_task_tag(cmd
));
2441 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2445 EXPORT_SYMBOL(transport_wait_for_tasks
);
2447 static int transport_get_sense_codes(
2452 *asc
= cmd
->scsi_asc
;
2453 *ascq
= cmd
->scsi_ascq
;
2459 transport_send_check_condition_and_sense(struct se_cmd
*cmd
,
2460 sense_reason_t reason
, int from_transport
)
2462 unsigned char *buffer
= cmd
->sense_buffer
;
2463 unsigned long flags
;
2464 u8 asc
= 0, ascq
= 0;
2466 spin_lock_irqsave(&cmd
->t_state_lock
, flags
);
2467 if (cmd
->se_cmd_flags
& SCF_SENT_CHECK_CONDITION
) {
2468 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2471 cmd
->se_cmd_flags
|= SCF_SENT_CHECK_CONDITION
;
2472 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2474 if (!reason
&& from_transport
)
2477 if (!from_transport
)
2478 cmd
->se_cmd_flags
|= SCF_EMULATED_TASK_SENSE
;
2481 * Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses
2482 * SENSE KEY values from include/scsi/scsi.h
2488 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2490 buffer
[SPC_SENSE_KEY_OFFSET
] = NOT_READY
;
2491 /* NO ADDITIONAL SENSE INFORMATION */
2492 buffer
[SPC_ASC_KEY_OFFSET
] = 0;
2493 buffer
[SPC_ASCQ_KEY_OFFSET
] = 0;
2495 case TCM_NON_EXISTENT_LUN
:
2498 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2499 /* ILLEGAL REQUEST */
2500 buffer
[SPC_SENSE_KEY_OFFSET
] = ILLEGAL_REQUEST
;
2501 /* LOGICAL UNIT NOT SUPPORTED */
2502 buffer
[SPC_ASC_KEY_OFFSET
] = 0x25;
2504 case TCM_UNSUPPORTED_SCSI_OPCODE
:
2505 case TCM_SECTOR_COUNT_TOO_MANY
:
2508 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2509 /* ILLEGAL REQUEST */
2510 buffer
[SPC_SENSE_KEY_OFFSET
] = ILLEGAL_REQUEST
;
2511 /* INVALID COMMAND OPERATION CODE */
2512 buffer
[SPC_ASC_KEY_OFFSET
] = 0x20;
2514 case TCM_UNKNOWN_MODE_PAGE
:
2517 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2518 /* ILLEGAL REQUEST */
2519 buffer
[SPC_SENSE_KEY_OFFSET
] = ILLEGAL_REQUEST
;
2520 /* INVALID FIELD IN CDB */
2521 buffer
[SPC_ASC_KEY_OFFSET
] = 0x24;
2523 case TCM_CHECK_CONDITION_ABORT_CMD
:
2526 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2527 /* ABORTED COMMAND */
2528 buffer
[SPC_SENSE_KEY_OFFSET
] = ABORTED_COMMAND
;
2529 /* BUS DEVICE RESET FUNCTION OCCURRED */
2530 buffer
[SPC_ASC_KEY_OFFSET
] = 0x29;
2531 buffer
[SPC_ASCQ_KEY_OFFSET
] = 0x03;
2533 case TCM_INCORRECT_AMOUNT_OF_DATA
:
2536 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2537 /* ABORTED COMMAND */
2538 buffer
[SPC_SENSE_KEY_OFFSET
] = ABORTED_COMMAND
;
2540 buffer
[SPC_ASC_KEY_OFFSET
] = 0x0c;
2541 /* NOT ENOUGH UNSOLICITED DATA */
2542 buffer
[SPC_ASCQ_KEY_OFFSET
] = 0x0d;
2544 case TCM_INVALID_CDB_FIELD
:
2547 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2548 /* ILLEGAL REQUEST */
2549 buffer
[SPC_SENSE_KEY_OFFSET
] = ILLEGAL_REQUEST
;
2550 /* INVALID FIELD IN CDB */
2551 buffer
[SPC_ASC_KEY_OFFSET
] = 0x24;
2553 case TCM_INVALID_PARAMETER_LIST
:
2556 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2557 /* ILLEGAL REQUEST */
2558 buffer
[SPC_SENSE_KEY_OFFSET
] = ILLEGAL_REQUEST
;
2559 /* INVALID FIELD IN PARAMETER LIST */
2560 buffer
[SPC_ASC_KEY_OFFSET
] = 0x26;
2562 case TCM_PARAMETER_LIST_LENGTH_ERROR
:
2565 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2566 /* ILLEGAL REQUEST */
2567 buffer
[SPC_SENSE_KEY_OFFSET
] = ILLEGAL_REQUEST
;
2568 /* PARAMETER LIST LENGTH ERROR */
2569 buffer
[SPC_ASC_KEY_OFFSET
] = 0x1a;
2571 case TCM_UNEXPECTED_UNSOLICITED_DATA
:
2574 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2575 /* ABORTED COMMAND */
2576 buffer
[SPC_SENSE_KEY_OFFSET
] = ABORTED_COMMAND
;
2578 buffer
[SPC_ASC_KEY_OFFSET
] = 0x0c;
2579 /* UNEXPECTED_UNSOLICITED_DATA */
2580 buffer
[SPC_ASCQ_KEY_OFFSET
] = 0x0c;
2582 case TCM_SERVICE_CRC_ERROR
:
2585 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2586 /* ABORTED COMMAND */
2587 buffer
[SPC_SENSE_KEY_OFFSET
] = ABORTED_COMMAND
;
2588 /* PROTOCOL SERVICE CRC ERROR */
2589 buffer
[SPC_ASC_KEY_OFFSET
] = 0x47;
2591 buffer
[SPC_ASCQ_KEY_OFFSET
] = 0x05;
2593 case TCM_SNACK_REJECTED
:
2596 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2597 /* ABORTED COMMAND */
2598 buffer
[SPC_SENSE_KEY_OFFSET
] = ABORTED_COMMAND
;
2600 buffer
[SPC_ASC_KEY_OFFSET
] = 0x11;
2601 /* FAILED RETRANSMISSION REQUEST */
2602 buffer
[SPC_ASCQ_KEY_OFFSET
] = 0x13;
2604 case TCM_WRITE_PROTECTED
:
2607 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2609 buffer
[SPC_SENSE_KEY_OFFSET
] = DATA_PROTECT
;
2610 /* WRITE PROTECTED */
2611 buffer
[SPC_ASC_KEY_OFFSET
] = 0x27;
2613 case TCM_ADDRESS_OUT_OF_RANGE
:
2616 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2617 /* ILLEGAL REQUEST */
2618 buffer
[SPC_SENSE_KEY_OFFSET
] = ILLEGAL_REQUEST
;
2619 /* LOGICAL BLOCK ADDRESS OUT OF RANGE */
2620 buffer
[SPC_ASC_KEY_OFFSET
] = 0x21;
2622 case TCM_CHECK_CONDITION_UNIT_ATTENTION
:
2625 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2626 /* UNIT ATTENTION */
2627 buffer
[SPC_SENSE_KEY_OFFSET
] = UNIT_ATTENTION
;
2628 core_scsi3_ua_for_check_condition(cmd
, &asc
, &ascq
);
2629 buffer
[SPC_ASC_KEY_OFFSET
] = asc
;
2630 buffer
[SPC_ASCQ_KEY_OFFSET
] = ascq
;
2632 case TCM_CHECK_CONDITION_NOT_READY
:
2635 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2637 buffer
[SPC_SENSE_KEY_OFFSET
] = NOT_READY
;
2638 transport_get_sense_codes(cmd
, &asc
, &ascq
);
2639 buffer
[SPC_ASC_KEY_OFFSET
] = asc
;
2640 buffer
[SPC_ASCQ_KEY_OFFSET
] = ascq
;
2642 case TCM_MISCOMPARE_VERIFY
:
2645 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2646 buffer
[SPC_SENSE_KEY_OFFSET
] = MISCOMPARE
;
2647 /* MISCOMPARE DURING VERIFY OPERATION */
2648 buffer
[SPC_ASC_KEY_OFFSET
] = 0x1d;
2649 buffer
[SPC_ASCQ_KEY_OFFSET
] = 0x00;
2651 case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
:
2655 buffer
[SPC_ADD_SENSE_LEN_OFFSET
] = 10;
2657 * Returning ILLEGAL REQUEST would cause immediate IO errors on
2658 * Solaris initiators. Returning NOT READY instead means the
2659 * operations will be retried a finite number of times and we
2660 * can survive intermittent errors.
2662 buffer
[SPC_SENSE_KEY_OFFSET
] = NOT_READY
;
2663 /* LOGICAL UNIT COMMUNICATION FAILURE */
2664 buffer
[SPC_ASC_KEY_OFFSET
] = 0x08;
2668 * This code uses linux/include/scsi/scsi.h SAM status codes!
2670 cmd
->scsi_status
= SAM_STAT_CHECK_CONDITION
;
2672 * Automatically padded, this value is encoded in the fabric's
2673 * data_length response PDU containing the SCSI defined sense data.
2675 cmd
->scsi_sense_length
= TRANSPORT_SENSE_BUFFER
;
2678 trace_target_cmd_complete(cmd
);
2679 return cmd
->se_tfo
->queue_status(cmd
);
2681 EXPORT_SYMBOL(transport_send_check_condition_and_sense
);
2683 int transport_check_aborted_status(struct se_cmd
*cmd
, int send_status
)
2685 if (!(cmd
->transport_state
& CMD_T_ABORTED
))
2688 if (!send_status
|| (cmd
->se_cmd_flags
& SCF_SENT_DELAYED_TAS
))
2691 pr_debug("Sending delayed SAM_STAT_TASK_ABORTED status for CDB: 0x%02x ITT: 0x%08x\n",
2692 cmd
->t_task_cdb
[0], cmd
->se_tfo
->get_task_tag(cmd
));
2694 cmd
->se_cmd_flags
|= SCF_SENT_DELAYED_TAS
;
2695 cmd
->scsi_status
= SAM_STAT_TASK_ABORTED
;
2696 trace_target_cmd_complete(cmd
);
2697 cmd
->se_tfo
->queue_status(cmd
);
2701 EXPORT_SYMBOL(transport_check_aborted_status
);
2703 void transport_send_task_abort(struct se_cmd
*cmd
)
2705 unsigned long flags
;
2707 spin_lock_irqsave(&cmd
->t_state_lock
, flags
);
2708 if (cmd
->se_cmd_flags
& (SCF_SENT_CHECK_CONDITION
| SCF_SENT_DELAYED_TAS
)) {
2709 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2712 spin_unlock_irqrestore(&cmd
->t_state_lock
, flags
);
2715 * If there are still expected incoming fabric WRITEs, we wait
2716 * until until they have completed before sending a TASK_ABORTED
2717 * response. This response with TASK_ABORTED status will be
2718 * queued back to fabric module by transport_check_aborted_status().
2720 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
2721 if (cmd
->se_tfo
->write_pending_status(cmd
) != 0) {
2722 cmd
->transport_state
|= CMD_T_ABORTED
;
2723 smp_mb__after_atomic_inc();
2727 cmd
->scsi_status
= SAM_STAT_TASK_ABORTED
;
2729 transport_lun_remove_cmd(cmd
);
2731 pr_debug("Setting SAM_STAT_TASK_ABORTED status for CDB: 0x%02x,"
2732 " ITT: 0x%08x\n", cmd
->t_task_cdb
[0],
2733 cmd
->se_tfo
->get_task_tag(cmd
));
2735 trace_target_cmd_complete(cmd
);
2736 cmd
->se_tfo
->queue_status(cmd
);
2739 static void target_tmr_work(struct work_struct
*work
)
2741 struct se_cmd
*cmd
= container_of(work
, struct se_cmd
, work
);
2742 struct se_device
*dev
= cmd
->se_dev
;
2743 struct se_tmr_req
*tmr
= cmd
->se_tmr_req
;
2746 switch (tmr
->function
) {
2747 case TMR_ABORT_TASK
:
2748 core_tmr_abort_task(dev
, tmr
, cmd
->se_sess
);
2750 case TMR_ABORT_TASK_SET
:
2752 case TMR_CLEAR_TASK_SET
:
2753 tmr
->response
= TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED
;
2756 ret
= core_tmr_lun_reset(dev
, tmr
, NULL
, NULL
);
2757 tmr
->response
= (!ret
) ? TMR_FUNCTION_COMPLETE
:
2758 TMR_FUNCTION_REJECTED
;
2760 case TMR_TARGET_WARM_RESET
:
2761 tmr
->response
= TMR_FUNCTION_REJECTED
;
2763 case TMR_TARGET_COLD_RESET
:
2764 tmr
->response
= TMR_FUNCTION_REJECTED
;
2767 pr_err("Uknown TMR function: 0x%02x.\n",
2769 tmr
->response
= TMR_FUNCTION_REJECTED
;
2773 cmd
->t_state
= TRANSPORT_ISTATE_PROCESSING
;
2774 cmd
->se_tfo
->queue_tm_rsp(cmd
);
2776 transport_cmd_check_stop_to_fabric(cmd
);
2779 int transport_generic_handle_tmr(
2782 INIT_WORK(&cmd
->work
, target_tmr_work
);
2783 queue_work(cmd
->se_dev
->tmr_wq
, &cmd
->work
);
2786 EXPORT_SYMBOL(transport_generic_handle_tmr
);