1 /*******************************************************************************
2 * This file contains the iSCSI Target specific utility functions.
4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.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.
19 ******************************************************************************/
21 #include <linux/list.h>
22 #include <scsi/scsi_tcq.h>
23 #include <scsi/iscsi_proto.h>
24 #include <target/target_core_base.h>
25 #include <target/target_core_fabric.h>
26 #include <target/target_core_configfs.h>
27 #include <target/iscsi/iscsi_transport.h>
29 #include "iscsi_target_core.h"
30 #include "iscsi_target_parameters.h"
31 #include "iscsi_target_seq_pdu_list.h"
32 #include "iscsi_target_datain_values.h"
33 #include "iscsi_target_erl0.h"
34 #include "iscsi_target_erl1.h"
35 #include "iscsi_target_erl2.h"
36 #include "iscsi_target_tpg.h"
37 #include "iscsi_target_tq.h"
38 #include "iscsi_target_util.h"
39 #include "iscsi_target.h"
41 #define PRINT_BUFF(buff, len) \
45 pr_debug("%d:\n", __LINE__); \
46 for (zzz = 0; zzz < len; zzz++) { \
47 if (zzz % 16 == 0) { \
50 pr_debug("%4i: ", zzz); \
52 pr_debug("%02x ", (unsigned char) (buff)[zzz]); \
58 extern struct list_head g_tiqn_list
;
59 extern spinlock_t tiqn_lock
;
62 * Called with cmd->r2t_lock held.
64 int iscsit_add_r2t_to_list(
65 struct iscsi_cmd
*cmd
,
71 struct iscsi_r2t
*r2t
;
73 r2t
= kmem_cache_zalloc(lio_r2t_cache
, GFP_ATOMIC
);
75 pr_err("Unable to allocate memory for struct iscsi_r2t.\n");
78 INIT_LIST_HEAD(&r2t
->r2t_list
);
80 r2t
->recovery_r2t
= recovery
;
81 r2t
->r2t_sn
= (!r2t_sn
) ? cmd
->r2t_sn
++ : r2t_sn
;
83 r2t
->xfer_len
= xfer_len
;
84 list_add_tail(&r2t
->r2t_list
, &cmd
->cmd_r2t_list
);
85 spin_unlock_bh(&cmd
->r2t_lock
);
87 iscsit_add_cmd_to_immediate_queue(cmd
, cmd
->conn
, ISTATE_SEND_R2T
);
89 spin_lock_bh(&cmd
->r2t_lock
);
93 struct iscsi_r2t
*iscsit_get_r2t_for_eos(
94 struct iscsi_cmd
*cmd
,
98 struct iscsi_r2t
*r2t
;
100 spin_lock_bh(&cmd
->r2t_lock
);
101 list_for_each_entry(r2t
, &cmd
->cmd_r2t_list
, r2t_list
) {
102 if ((r2t
->offset
<= offset
) &&
103 (r2t
->offset
+ r2t
->xfer_len
) >= (offset
+ length
)) {
104 spin_unlock_bh(&cmd
->r2t_lock
);
108 spin_unlock_bh(&cmd
->r2t_lock
);
110 pr_err("Unable to locate R2T for Offset: %u, Length:"
111 " %u\n", offset
, length
);
115 struct iscsi_r2t
*iscsit_get_r2t_from_list(struct iscsi_cmd
*cmd
)
117 struct iscsi_r2t
*r2t
;
119 spin_lock_bh(&cmd
->r2t_lock
);
120 list_for_each_entry(r2t
, &cmd
->cmd_r2t_list
, r2t_list
) {
121 if (!r2t
->sent_r2t
) {
122 spin_unlock_bh(&cmd
->r2t_lock
);
126 spin_unlock_bh(&cmd
->r2t_lock
);
128 pr_err("Unable to locate next R2T to send for ITT:"
129 " 0x%08x.\n", cmd
->init_task_tag
);
134 * Called with cmd->r2t_lock held.
136 void iscsit_free_r2t(struct iscsi_r2t
*r2t
, struct iscsi_cmd
*cmd
)
138 list_del(&r2t
->r2t_list
);
139 kmem_cache_free(lio_r2t_cache
, r2t
);
142 void iscsit_free_r2ts_from_list(struct iscsi_cmd
*cmd
)
144 struct iscsi_r2t
*r2t
, *r2t_tmp
;
146 spin_lock_bh(&cmd
->r2t_lock
);
147 list_for_each_entry_safe(r2t
, r2t_tmp
, &cmd
->cmd_r2t_list
, r2t_list
)
148 iscsit_free_r2t(r2t
, cmd
);
149 spin_unlock_bh(&cmd
->r2t_lock
);
152 struct iscsi_cmd
*iscsit_alloc_cmd(struct iscsi_conn
*conn
, gfp_t gfp_mask
)
154 struct iscsi_cmd
*cmd
;
156 cmd
= kmem_cache_zalloc(lio_cmd_cache
, gfp_mask
);
160 cmd
->release_cmd
= &iscsit_release_cmd
;
165 * May be called from software interrupt (timer) context for allocating
168 struct iscsi_cmd
*iscsit_allocate_cmd(struct iscsi_conn
*conn
, gfp_t gfp_mask
)
170 struct iscsi_cmd
*cmd
;
172 cmd
= conn
->conn_transport
->iscsit_alloc_cmd(conn
, gfp_mask
);
174 pr_err("Unable to allocate memory for struct iscsi_cmd.\n");
178 INIT_LIST_HEAD(&cmd
->i_conn_node
);
179 INIT_LIST_HEAD(&cmd
->datain_list
);
180 INIT_LIST_HEAD(&cmd
->cmd_r2t_list
);
181 init_completion(&cmd
->reject_comp
);
182 spin_lock_init(&cmd
->datain_lock
);
183 spin_lock_init(&cmd
->dataout_timeout_lock
);
184 spin_lock_init(&cmd
->istate_lock
);
185 spin_lock_init(&cmd
->error_lock
);
186 spin_lock_init(&cmd
->r2t_lock
);
190 EXPORT_SYMBOL(iscsit_allocate_cmd
);
192 struct iscsi_seq
*iscsit_get_seq_holder_for_datain(
193 struct iscsi_cmd
*cmd
,
198 for (i
= 0; i
< cmd
->seq_count
; i
++)
199 if (cmd
->seq_list
[i
].seq_send_order
== seq_send_order
)
200 return &cmd
->seq_list
[i
];
205 struct iscsi_seq
*iscsit_get_seq_holder_for_r2t(struct iscsi_cmd
*cmd
)
209 if (!cmd
->seq_list
) {
210 pr_err("struct iscsi_cmd->seq_list is NULL!\n");
214 for (i
= 0; i
< cmd
->seq_count
; i
++) {
215 if (cmd
->seq_list
[i
].type
!= SEQTYPE_NORMAL
)
217 if (cmd
->seq_list
[i
].seq_send_order
== cmd
->seq_send_order
) {
218 cmd
->seq_send_order
++;
219 return &cmd
->seq_list
[i
];
226 struct iscsi_r2t
*iscsit_get_holder_for_r2tsn(
227 struct iscsi_cmd
*cmd
,
230 struct iscsi_r2t
*r2t
;
232 spin_lock_bh(&cmd
->r2t_lock
);
233 list_for_each_entry(r2t
, &cmd
->cmd_r2t_list
, r2t_list
) {
234 if (r2t
->r2t_sn
== r2t_sn
) {
235 spin_unlock_bh(&cmd
->r2t_lock
);
239 spin_unlock_bh(&cmd
->r2t_lock
);
244 static inline int iscsit_check_received_cmdsn(struct iscsi_session
*sess
, u32 cmdsn
)
249 * This is the proper method of checking received CmdSN against
250 * ExpCmdSN and MaxCmdSN values, as well as accounting for out
251 * or order CmdSNs due to multiple connection sessions and/or
254 if (iscsi_sna_gt(cmdsn
, sess
->max_cmd_sn
)) {
255 pr_err("Received CmdSN: 0x%08x is greater than"
256 " MaxCmdSN: 0x%08x, protocol error.\n", cmdsn
,
258 ret
= CMDSN_ERROR_CANNOT_RECOVER
;
260 } else if (cmdsn
== sess
->exp_cmd_sn
) {
262 pr_debug("Received CmdSN matches ExpCmdSN,"
263 " incremented ExpCmdSN to: 0x%08x\n",
265 ret
= CMDSN_NORMAL_OPERATION
;
267 } else if (iscsi_sna_gt(cmdsn
, sess
->exp_cmd_sn
)) {
268 pr_debug("Received CmdSN: 0x%08x is greater"
269 " than ExpCmdSN: 0x%08x, not acknowledging.\n",
270 cmdsn
, sess
->exp_cmd_sn
);
271 ret
= CMDSN_HIGHER_THAN_EXP
;
274 pr_err("Received CmdSN: 0x%08x is less than"
275 " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn
,
277 ret
= CMDSN_LOWER_THAN_EXP
;
284 * Commands may be received out of order if MC/S is in use.
285 * Ensure they are executed in CmdSN order.
287 int iscsit_sequence_cmd(
288 struct iscsi_conn
*conn
,
289 struct iscsi_cmd
*cmd
,
295 mutex_lock(&conn
->sess
->cmdsn_mutex
);
297 cmdsn_ret
= iscsit_check_received_cmdsn(conn
->sess
, be32_to_cpu(cmdsn
));
299 case CMDSN_NORMAL_OPERATION
:
300 ret
= iscsit_execute_cmd(cmd
, 0);
301 if ((ret
>= 0) && !list_empty(&conn
->sess
->sess_ooo_cmdsn_list
))
302 iscsit_execute_ooo_cmdsns(conn
->sess
);
304 case CMDSN_HIGHER_THAN_EXP
:
305 ret
= iscsit_handle_ooo_cmdsn(conn
->sess
, cmd
, be32_to_cpu(cmdsn
));
307 case CMDSN_LOWER_THAN_EXP
:
308 cmd
->i_state
= ISTATE_REMOVE
;
309 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, cmd
->i_state
);
316 mutex_unlock(&conn
->sess
->cmdsn_mutex
);
320 EXPORT_SYMBOL(iscsit_sequence_cmd
);
322 int iscsit_check_unsolicited_dataout(struct iscsi_cmd
*cmd
, unsigned char *buf
)
324 struct iscsi_conn
*conn
= cmd
->conn
;
325 struct se_cmd
*se_cmd
= &cmd
->se_cmd
;
326 struct iscsi_data
*hdr
= (struct iscsi_data
*) buf
;
327 u32 payload_length
= ntoh24(hdr
->dlength
);
329 if (conn
->sess
->sess_ops
->InitialR2T
) {
330 pr_err("Received unexpected unsolicited data"
331 " while InitialR2T=Yes, protocol error.\n");
332 transport_send_check_condition_and_sense(se_cmd
,
333 TCM_UNEXPECTED_UNSOLICITED_DATA
, 0);
337 if ((cmd
->first_burst_len
+ payload_length
) >
338 conn
->sess
->sess_ops
->FirstBurstLength
) {
339 pr_err("Total %u bytes exceeds FirstBurstLength: %u"
340 " for this Unsolicited DataOut Burst.\n",
341 (cmd
->first_burst_len
+ payload_length
),
342 conn
->sess
->sess_ops
->FirstBurstLength
);
343 transport_send_check_condition_and_sense(se_cmd
,
344 TCM_INCORRECT_AMOUNT_OF_DATA
, 0);
348 if (!(hdr
->flags
& ISCSI_FLAG_CMD_FINAL
))
351 if (((cmd
->first_burst_len
+ payload_length
) != cmd
->se_cmd
.data_length
) &&
352 ((cmd
->first_burst_len
+ payload_length
) !=
353 conn
->sess
->sess_ops
->FirstBurstLength
)) {
354 pr_err("Unsolicited non-immediate data received %u"
355 " does not equal FirstBurstLength: %u, and does"
356 " not equal ExpXferLen %u.\n",
357 (cmd
->first_burst_len
+ payload_length
),
358 conn
->sess
->sess_ops
->FirstBurstLength
, cmd
->se_cmd
.data_length
);
359 transport_send_check_condition_and_sense(se_cmd
,
360 TCM_INCORRECT_AMOUNT_OF_DATA
, 0);
366 struct iscsi_cmd
*iscsit_find_cmd_from_itt(
367 struct iscsi_conn
*conn
,
370 struct iscsi_cmd
*cmd
;
372 spin_lock_bh(&conn
->cmd_lock
);
373 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
374 if (cmd
->init_task_tag
== init_task_tag
) {
375 spin_unlock_bh(&conn
->cmd_lock
);
379 spin_unlock_bh(&conn
->cmd_lock
);
381 pr_err("Unable to locate ITT: 0x%08x on CID: %hu",
382 init_task_tag
, conn
->cid
);
386 struct iscsi_cmd
*iscsit_find_cmd_from_itt_or_dump(
387 struct iscsi_conn
*conn
,
391 struct iscsi_cmd
*cmd
;
393 spin_lock_bh(&conn
->cmd_lock
);
394 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
395 if (cmd
->init_task_tag
== init_task_tag
) {
396 spin_unlock_bh(&conn
->cmd_lock
);
400 spin_unlock_bh(&conn
->cmd_lock
);
402 pr_err("Unable to locate ITT: 0x%08x on CID: %hu,"
403 " dumping payload\n", init_task_tag
, conn
->cid
);
405 iscsit_dump_data_payload(conn
, length
, 1);
410 struct iscsi_cmd
*iscsit_find_cmd_from_ttt(
411 struct iscsi_conn
*conn
,
414 struct iscsi_cmd
*cmd
= NULL
;
416 spin_lock_bh(&conn
->cmd_lock
);
417 list_for_each_entry(cmd
, &conn
->conn_cmd_list
, i_conn_node
) {
418 if (cmd
->targ_xfer_tag
== targ_xfer_tag
) {
419 spin_unlock_bh(&conn
->cmd_lock
);
423 spin_unlock_bh(&conn
->cmd_lock
);
425 pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n",
426 targ_xfer_tag
, conn
->cid
);
430 int iscsit_find_cmd_for_recovery(
431 struct iscsi_session
*sess
,
432 struct iscsi_cmd
**cmd_ptr
,
433 struct iscsi_conn_recovery
**cr_ptr
,
436 struct iscsi_cmd
*cmd
= NULL
;
437 struct iscsi_conn_recovery
*cr
;
439 * Scan through the inactive connection recovery list's command list.
440 * If init_task_tag matches the command is still alligent.
442 spin_lock(&sess
->cr_i_lock
);
443 list_for_each_entry(cr
, &sess
->cr_inactive_list
, cr_list
) {
444 spin_lock(&cr
->conn_recovery_cmd_lock
);
445 list_for_each_entry(cmd
, &cr
->conn_recovery_cmd_list
, i_conn_node
) {
446 if (cmd
->init_task_tag
== init_task_tag
) {
447 spin_unlock(&cr
->conn_recovery_cmd_lock
);
448 spin_unlock(&sess
->cr_i_lock
);
455 spin_unlock(&cr
->conn_recovery_cmd_lock
);
457 spin_unlock(&sess
->cr_i_lock
);
459 * Scan through the active connection recovery list's command list.
460 * If init_task_tag matches the command is ready to be reassigned.
462 spin_lock(&sess
->cr_a_lock
);
463 list_for_each_entry(cr
, &sess
->cr_active_list
, cr_list
) {
464 spin_lock(&cr
->conn_recovery_cmd_lock
);
465 list_for_each_entry(cmd
, &cr
->conn_recovery_cmd_list
, i_conn_node
) {
466 if (cmd
->init_task_tag
== init_task_tag
) {
467 spin_unlock(&cr
->conn_recovery_cmd_lock
);
468 spin_unlock(&sess
->cr_a_lock
);
475 spin_unlock(&cr
->conn_recovery_cmd_lock
);
477 spin_unlock(&sess
->cr_a_lock
);
482 void iscsit_add_cmd_to_immediate_queue(
483 struct iscsi_cmd
*cmd
,
484 struct iscsi_conn
*conn
,
487 struct iscsi_queue_req
*qr
;
489 qr
= kmem_cache_zalloc(lio_qr_cache
, GFP_ATOMIC
);
491 pr_err("Unable to allocate memory for"
492 " struct iscsi_queue_req\n");
495 INIT_LIST_HEAD(&qr
->qr_list
);
499 spin_lock_bh(&conn
->immed_queue_lock
);
500 list_add_tail(&qr
->qr_list
, &conn
->immed_queue_list
);
501 atomic_inc(&cmd
->immed_queue_count
);
502 atomic_set(&conn
->check_immediate_queue
, 1);
503 spin_unlock_bh(&conn
->immed_queue_lock
);
505 wake_up(&conn
->queues_wq
);
508 struct iscsi_queue_req
*iscsit_get_cmd_from_immediate_queue(struct iscsi_conn
*conn
)
510 struct iscsi_queue_req
*qr
;
512 spin_lock_bh(&conn
->immed_queue_lock
);
513 if (list_empty(&conn
->immed_queue_list
)) {
514 spin_unlock_bh(&conn
->immed_queue_lock
);
517 qr
= list_first_entry(&conn
->immed_queue_list
,
518 struct iscsi_queue_req
, qr_list
);
520 list_del(&qr
->qr_list
);
522 atomic_dec(&qr
->cmd
->immed_queue_count
);
523 spin_unlock_bh(&conn
->immed_queue_lock
);
528 static void iscsit_remove_cmd_from_immediate_queue(
529 struct iscsi_cmd
*cmd
,
530 struct iscsi_conn
*conn
)
532 struct iscsi_queue_req
*qr
, *qr_tmp
;
534 spin_lock_bh(&conn
->immed_queue_lock
);
535 if (!atomic_read(&cmd
->immed_queue_count
)) {
536 spin_unlock_bh(&conn
->immed_queue_lock
);
540 list_for_each_entry_safe(qr
, qr_tmp
, &conn
->immed_queue_list
, qr_list
) {
544 atomic_dec(&qr
->cmd
->immed_queue_count
);
545 list_del(&qr
->qr_list
);
546 kmem_cache_free(lio_qr_cache
, qr
);
548 spin_unlock_bh(&conn
->immed_queue_lock
);
550 if (atomic_read(&cmd
->immed_queue_count
)) {
551 pr_err("ITT: 0x%08x immed_queue_count: %d\n",
553 atomic_read(&cmd
->immed_queue_count
));
557 void iscsit_add_cmd_to_response_queue(
558 struct iscsi_cmd
*cmd
,
559 struct iscsi_conn
*conn
,
562 struct iscsi_queue_req
*qr
;
564 qr
= kmem_cache_zalloc(lio_qr_cache
, GFP_ATOMIC
);
566 pr_err("Unable to allocate memory for"
567 " struct iscsi_queue_req\n");
570 INIT_LIST_HEAD(&qr
->qr_list
);
574 spin_lock_bh(&conn
->response_queue_lock
);
575 list_add_tail(&qr
->qr_list
, &conn
->response_queue_list
);
576 atomic_inc(&cmd
->response_queue_count
);
577 spin_unlock_bh(&conn
->response_queue_lock
);
579 wake_up(&conn
->queues_wq
);
582 struct iscsi_queue_req
*iscsit_get_cmd_from_response_queue(struct iscsi_conn
*conn
)
584 struct iscsi_queue_req
*qr
;
586 spin_lock_bh(&conn
->response_queue_lock
);
587 if (list_empty(&conn
->response_queue_list
)) {
588 spin_unlock_bh(&conn
->response_queue_lock
);
592 qr
= list_first_entry(&conn
->response_queue_list
,
593 struct iscsi_queue_req
, qr_list
);
595 list_del(&qr
->qr_list
);
597 atomic_dec(&qr
->cmd
->response_queue_count
);
598 spin_unlock_bh(&conn
->response_queue_lock
);
603 static void iscsit_remove_cmd_from_response_queue(
604 struct iscsi_cmd
*cmd
,
605 struct iscsi_conn
*conn
)
607 struct iscsi_queue_req
*qr
, *qr_tmp
;
609 spin_lock_bh(&conn
->response_queue_lock
);
610 if (!atomic_read(&cmd
->response_queue_count
)) {
611 spin_unlock_bh(&conn
->response_queue_lock
);
615 list_for_each_entry_safe(qr
, qr_tmp
, &conn
->response_queue_list
,
620 atomic_dec(&qr
->cmd
->response_queue_count
);
621 list_del(&qr
->qr_list
);
622 kmem_cache_free(lio_qr_cache
, qr
);
624 spin_unlock_bh(&conn
->response_queue_lock
);
626 if (atomic_read(&cmd
->response_queue_count
)) {
627 pr_err("ITT: 0x%08x response_queue_count: %d\n",
629 atomic_read(&cmd
->response_queue_count
));
633 bool iscsit_conn_all_queues_empty(struct iscsi_conn
*conn
)
637 spin_lock_bh(&conn
->immed_queue_lock
);
638 empty
= list_empty(&conn
->immed_queue_list
);
639 spin_unlock_bh(&conn
->immed_queue_lock
);
644 spin_lock_bh(&conn
->response_queue_lock
);
645 empty
= list_empty(&conn
->response_queue_list
);
646 spin_unlock_bh(&conn
->response_queue_lock
);
651 void iscsit_free_queue_reqs_for_conn(struct iscsi_conn
*conn
)
653 struct iscsi_queue_req
*qr
, *qr_tmp
;
655 spin_lock_bh(&conn
->immed_queue_lock
);
656 list_for_each_entry_safe(qr
, qr_tmp
, &conn
->immed_queue_list
, qr_list
) {
657 list_del(&qr
->qr_list
);
659 atomic_dec(&qr
->cmd
->immed_queue_count
);
661 kmem_cache_free(lio_qr_cache
, qr
);
663 spin_unlock_bh(&conn
->immed_queue_lock
);
665 spin_lock_bh(&conn
->response_queue_lock
);
666 list_for_each_entry_safe(qr
, qr_tmp
, &conn
->response_queue_list
,
668 list_del(&qr
->qr_list
);
670 atomic_dec(&qr
->cmd
->response_queue_count
);
672 kmem_cache_free(lio_qr_cache
, qr
);
674 spin_unlock_bh(&conn
->response_queue_lock
);
677 void iscsit_release_cmd(struct iscsi_cmd
*cmd
)
680 kfree(cmd
->pdu_list
);
681 kfree(cmd
->seq_list
);
683 kfree(cmd
->iov_data
);
685 kmem_cache_free(lio_cmd_cache
, cmd
);
688 static void __iscsit_free_cmd(struct iscsi_cmd
*cmd
, bool scsi_cmd
,
691 struct iscsi_conn
*conn
= cmd
->conn
;
694 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
695 iscsit_stop_dataout_timer(cmd
);
696 iscsit_free_r2ts_from_list(cmd
);
698 if (cmd
->data_direction
== DMA_FROM_DEVICE
)
699 iscsit_free_all_datain_reqs(cmd
);
702 if (conn
&& check_queues
) {
703 iscsit_remove_cmd_from_immediate_queue(cmd
, conn
);
704 iscsit_remove_cmd_from_response_queue(cmd
, conn
);
708 void iscsit_free_cmd(struct iscsi_cmd
*cmd
, bool shutdown
)
710 struct se_cmd
*se_cmd
= NULL
;
713 * Determine if a struct se_cmd is associated with
714 * this struct iscsi_cmd.
716 switch (cmd
->iscsi_opcode
) {
717 case ISCSI_OP_SCSI_CMD
:
718 se_cmd
= &cmd
->se_cmd
;
719 __iscsit_free_cmd(cmd
, true, shutdown
);
723 case ISCSI_OP_SCSI_TMFUNC
:
724 rc
= transport_generic_free_cmd(&cmd
->se_cmd
, 1);
725 if (!rc
&& shutdown
&& se_cmd
&& se_cmd
->se_sess
) {
726 __iscsit_free_cmd(cmd
, true, shutdown
);
727 target_put_sess_cmd(se_cmd
->se_sess
, se_cmd
);
730 case ISCSI_OP_REJECT
:
732 * Handle special case for REJECT when iscsi_add_reject*() has
733 * overwritten the original iscsi_opcode assignment, and the
734 * associated cmd->se_cmd needs to be released.
736 if (cmd
->se_cmd
.se_tfo
!= NULL
) {
737 se_cmd
= &cmd
->se_cmd
;
738 __iscsit_free_cmd(cmd
, true, shutdown
);
740 rc
= transport_generic_free_cmd(&cmd
->se_cmd
, 1);
741 if (!rc
&& shutdown
&& se_cmd
->se_sess
) {
742 __iscsit_free_cmd(cmd
, true, shutdown
);
743 target_put_sess_cmd(se_cmd
->se_sess
, se_cmd
);
749 __iscsit_free_cmd(cmd
, false, shutdown
);
750 cmd
->release_cmd(cmd
);
755 int iscsit_check_session_usage_count(struct iscsi_session
*sess
)
757 spin_lock_bh(&sess
->session_usage_lock
);
758 if (sess
->session_usage_count
!= 0) {
759 sess
->session_waiting_on_uc
= 1;
760 spin_unlock_bh(&sess
->session_usage_lock
);
764 wait_for_completion(&sess
->session_waiting_on_uc_comp
);
767 spin_unlock_bh(&sess
->session_usage_lock
);
772 void iscsit_dec_session_usage_count(struct iscsi_session
*sess
)
774 spin_lock_bh(&sess
->session_usage_lock
);
775 sess
->session_usage_count
--;
777 if (!sess
->session_usage_count
&& sess
->session_waiting_on_uc
)
778 complete(&sess
->session_waiting_on_uc_comp
);
780 spin_unlock_bh(&sess
->session_usage_lock
);
783 void iscsit_inc_session_usage_count(struct iscsi_session
*sess
)
785 spin_lock_bh(&sess
->session_usage_lock
);
786 sess
->session_usage_count
++;
787 spin_unlock_bh(&sess
->session_usage_lock
);
791 * Setup conn->if_marker and conn->of_marker values based upon
792 * the initial marker-less interval. (see iSCSI v19 A.2)
794 int iscsit_set_sync_and_steering_values(struct iscsi_conn
*conn
)
796 int login_ifmarker_count
= 0, login_ofmarker_count
= 0, next_marker
= 0;
798 * IFMarkInt and OFMarkInt are negotiated as 32-bit words.
800 u32 IFMarkInt
= (conn
->conn_ops
->IFMarkInt
* 4);
801 u32 OFMarkInt
= (conn
->conn_ops
->OFMarkInt
* 4);
803 if (conn
->conn_ops
->OFMarker
) {
805 * Account for the first Login Command received not
806 * via iscsi_recv_msg().
808 conn
->of_marker
+= ISCSI_HDR_LEN
;
809 if (conn
->of_marker
<= OFMarkInt
) {
810 conn
->of_marker
= (OFMarkInt
- conn
->of_marker
);
812 login_ofmarker_count
= (conn
->of_marker
/ OFMarkInt
);
813 next_marker
= (OFMarkInt
* (login_ofmarker_count
+ 1)) +
814 (login_ofmarker_count
* MARKER_SIZE
);
815 conn
->of_marker
= (next_marker
- conn
->of_marker
);
817 conn
->of_marker_offset
= 0;
818 pr_debug("Setting OFMarker value to %u based on Initial"
819 " Markerless Interval.\n", conn
->of_marker
);
822 if (conn
->conn_ops
->IFMarker
) {
823 if (conn
->if_marker
<= IFMarkInt
) {
824 conn
->if_marker
= (IFMarkInt
- conn
->if_marker
);
826 login_ifmarker_count
= (conn
->if_marker
/ IFMarkInt
);
827 next_marker
= (IFMarkInt
* (login_ifmarker_count
+ 1)) +
828 (login_ifmarker_count
* MARKER_SIZE
);
829 conn
->if_marker
= (next_marker
- conn
->if_marker
);
831 pr_debug("Setting IFMarker value to %u based on Initial"
832 " Markerless Interval.\n", conn
->if_marker
);
838 struct iscsi_conn
*iscsit_get_conn_from_cid(struct iscsi_session
*sess
, u16 cid
)
840 struct iscsi_conn
*conn
;
842 spin_lock_bh(&sess
->conn_lock
);
843 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
844 if ((conn
->cid
== cid
) &&
845 (conn
->conn_state
== TARG_CONN_STATE_LOGGED_IN
)) {
846 iscsit_inc_conn_usage_count(conn
);
847 spin_unlock_bh(&sess
->conn_lock
);
851 spin_unlock_bh(&sess
->conn_lock
);
856 struct iscsi_conn
*iscsit_get_conn_from_cid_rcfr(struct iscsi_session
*sess
, u16 cid
)
858 struct iscsi_conn
*conn
;
860 spin_lock_bh(&sess
->conn_lock
);
861 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
) {
862 if (conn
->cid
== cid
) {
863 iscsit_inc_conn_usage_count(conn
);
864 spin_lock(&conn
->state_lock
);
865 atomic_set(&conn
->connection_wait_rcfr
, 1);
866 spin_unlock(&conn
->state_lock
);
867 spin_unlock_bh(&sess
->conn_lock
);
871 spin_unlock_bh(&sess
->conn_lock
);
876 void iscsit_check_conn_usage_count(struct iscsi_conn
*conn
)
878 spin_lock_bh(&conn
->conn_usage_lock
);
879 if (conn
->conn_usage_count
!= 0) {
880 conn
->conn_waiting_on_uc
= 1;
881 spin_unlock_bh(&conn
->conn_usage_lock
);
883 wait_for_completion(&conn
->conn_waiting_on_uc_comp
);
886 spin_unlock_bh(&conn
->conn_usage_lock
);
889 void iscsit_dec_conn_usage_count(struct iscsi_conn
*conn
)
891 spin_lock_bh(&conn
->conn_usage_lock
);
892 conn
->conn_usage_count
--;
894 if (!conn
->conn_usage_count
&& conn
->conn_waiting_on_uc
)
895 complete(&conn
->conn_waiting_on_uc_comp
);
897 spin_unlock_bh(&conn
->conn_usage_lock
);
900 void iscsit_inc_conn_usage_count(struct iscsi_conn
*conn
)
902 spin_lock_bh(&conn
->conn_usage_lock
);
903 conn
->conn_usage_count
++;
904 spin_unlock_bh(&conn
->conn_usage_lock
);
907 static int iscsit_add_nopin(struct iscsi_conn
*conn
, int want_response
)
910 struct iscsi_cmd
*cmd
;
912 cmd
= iscsit_allocate_cmd(conn
, GFP_ATOMIC
);
916 cmd
->iscsi_opcode
= ISCSI_OP_NOOP_IN
;
917 state
= (want_response
) ? ISTATE_SEND_NOPIN_WANT_RESPONSE
:
918 ISTATE_SEND_NOPIN_NO_RESPONSE
;
919 cmd
->init_task_tag
= RESERVED_ITT
;
920 spin_lock_bh(&conn
->sess
->ttt_lock
);
921 cmd
->targ_xfer_tag
= (want_response
) ? conn
->sess
->targ_xfer_tag
++ :
923 if (want_response
&& (cmd
->targ_xfer_tag
== 0xFFFFFFFF))
924 cmd
->targ_xfer_tag
= conn
->sess
->targ_xfer_tag
++;
925 spin_unlock_bh(&conn
->sess
->ttt_lock
);
927 spin_lock_bh(&conn
->cmd_lock
);
928 list_add_tail(&cmd
->i_conn_node
, &conn
->conn_cmd_list
);
929 spin_unlock_bh(&conn
->cmd_lock
);
932 iscsit_start_nopin_response_timer(conn
);
933 iscsit_add_cmd_to_immediate_queue(cmd
, conn
, state
);
938 static void iscsit_handle_nopin_response_timeout(unsigned long data
)
940 struct iscsi_conn
*conn
= (struct iscsi_conn
*) data
;
942 iscsit_inc_conn_usage_count(conn
);
944 spin_lock_bh(&conn
->nopin_timer_lock
);
945 if (conn
->nopin_response_timer_flags
& ISCSI_TF_STOP
) {
946 spin_unlock_bh(&conn
->nopin_timer_lock
);
947 iscsit_dec_conn_usage_count(conn
);
951 pr_debug("Did not receive response to NOPIN on CID: %hu on"
952 " SID: %u, failing connection.\n", conn
->cid
,
954 conn
->nopin_response_timer_flags
&= ~ISCSI_TF_RUNNING
;
955 spin_unlock_bh(&conn
->nopin_timer_lock
);
958 struct iscsi_portal_group
*tpg
= conn
->sess
->tpg
;
959 struct iscsi_tiqn
*tiqn
= tpg
->tpg_tiqn
;
962 spin_lock_bh(&tiqn
->sess_err_stats
.lock
);
963 strcpy(tiqn
->sess_err_stats
.last_sess_fail_rem_name
,
964 conn
->sess
->sess_ops
->InitiatorName
);
965 tiqn
->sess_err_stats
.last_sess_failure_type
=
966 ISCSI_SESS_ERR_CXN_TIMEOUT
;
967 tiqn
->sess_err_stats
.cxn_timeout_errors
++;
968 conn
->sess
->conn_timeout_errors
++;
969 spin_unlock_bh(&tiqn
->sess_err_stats
.lock
);
973 iscsit_cause_connection_reinstatement(conn
, 0);
974 iscsit_dec_conn_usage_count(conn
);
977 void iscsit_mod_nopin_response_timer(struct iscsi_conn
*conn
)
979 struct iscsi_session
*sess
= conn
->sess
;
980 struct iscsi_node_attrib
*na
= iscsit_tpg_get_node_attrib(sess
);
982 spin_lock_bh(&conn
->nopin_timer_lock
);
983 if (!(conn
->nopin_response_timer_flags
& ISCSI_TF_RUNNING
)) {
984 spin_unlock_bh(&conn
->nopin_timer_lock
);
988 mod_timer(&conn
->nopin_response_timer
,
989 (get_jiffies_64() + na
->nopin_response_timeout
* HZ
));
990 spin_unlock_bh(&conn
->nopin_timer_lock
);
994 * Called with conn->nopin_timer_lock held.
996 void iscsit_start_nopin_response_timer(struct iscsi_conn
*conn
)
998 struct iscsi_session
*sess
= conn
->sess
;
999 struct iscsi_node_attrib
*na
= iscsit_tpg_get_node_attrib(sess
);
1001 spin_lock_bh(&conn
->nopin_timer_lock
);
1002 if (conn
->nopin_response_timer_flags
& ISCSI_TF_RUNNING
) {
1003 spin_unlock_bh(&conn
->nopin_timer_lock
);
1007 init_timer(&conn
->nopin_response_timer
);
1008 conn
->nopin_response_timer
.expires
=
1009 (get_jiffies_64() + na
->nopin_response_timeout
* HZ
);
1010 conn
->nopin_response_timer
.data
= (unsigned long)conn
;
1011 conn
->nopin_response_timer
.function
= iscsit_handle_nopin_response_timeout
;
1012 conn
->nopin_response_timer_flags
&= ~ISCSI_TF_STOP
;
1013 conn
->nopin_response_timer_flags
|= ISCSI_TF_RUNNING
;
1014 add_timer(&conn
->nopin_response_timer
);
1016 pr_debug("Started NOPIN Response Timer on CID: %d to %u"
1017 " seconds\n", conn
->cid
, na
->nopin_response_timeout
);
1018 spin_unlock_bh(&conn
->nopin_timer_lock
);
1021 void iscsit_stop_nopin_response_timer(struct iscsi_conn
*conn
)
1023 spin_lock_bh(&conn
->nopin_timer_lock
);
1024 if (!(conn
->nopin_response_timer_flags
& ISCSI_TF_RUNNING
)) {
1025 spin_unlock_bh(&conn
->nopin_timer_lock
);
1028 conn
->nopin_response_timer_flags
|= ISCSI_TF_STOP
;
1029 spin_unlock_bh(&conn
->nopin_timer_lock
);
1031 del_timer_sync(&conn
->nopin_response_timer
);
1033 spin_lock_bh(&conn
->nopin_timer_lock
);
1034 conn
->nopin_response_timer_flags
&= ~ISCSI_TF_RUNNING
;
1035 spin_unlock_bh(&conn
->nopin_timer_lock
);
1038 static void iscsit_handle_nopin_timeout(unsigned long data
)
1040 struct iscsi_conn
*conn
= (struct iscsi_conn
*) data
;
1042 iscsit_inc_conn_usage_count(conn
);
1044 spin_lock_bh(&conn
->nopin_timer_lock
);
1045 if (conn
->nopin_timer_flags
& ISCSI_TF_STOP
) {
1046 spin_unlock_bh(&conn
->nopin_timer_lock
);
1047 iscsit_dec_conn_usage_count(conn
);
1050 conn
->nopin_timer_flags
&= ~ISCSI_TF_RUNNING
;
1051 spin_unlock_bh(&conn
->nopin_timer_lock
);
1053 iscsit_add_nopin(conn
, 1);
1054 iscsit_dec_conn_usage_count(conn
);
1058 * Called with conn->nopin_timer_lock held.
1060 void __iscsit_start_nopin_timer(struct iscsi_conn
*conn
)
1062 struct iscsi_session
*sess
= conn
->sess
;
1063 struct iscsi_node_attrib
*na
= iscsit_tpg_get_node_attrib(sess
);
1065 * NOPIN timeout is disabled.
1067 if (!na
->nopin_timeout
)
1070 if (conn
->nopin_timer_flags
& ISCSI_TF_RUNNING
)
1073 init_timer(&conn
->nopin_timer
);
1074 conn
->nopin_timer
.expires
= (get_jiffies_64() + na
->nopin_timeout
* HZ
);
1075 conn
->nopin_timer
.data
= (unsigned long)conn
;
1076 conn
->nopin_timer
.function
= iscsit_handle_nopin_timeout
;
1077 conn
->nopin_timer_flags
&= ~ISCSI_TF_STOP
;
1078 conn
->nopin_timer_flags
|= ISCSI_TF_RUNNING
;
1079 add_timer(&conn
->nopin_timer
);
1081 pr_debug("Started NOPIN Timer on CID: %d at %u second"
1082 " interval\n", conn
->cid
, na
->nopin_timeout
);
1085 void iscsit_start_nopin_timer(struct iscsi_conn
*conn
)
1087 struct iscsi_session
*sess
= conn
->sess
;
1088 struct iscsi_node_attrib
*na
= iscsit_tpg_get_node_attrib(sess
);
1090 * NOPIN timeout is disabled..
1092 if (!na
->nopin_timeout
)
1095 spin_lock_bh(&conn
->nopin_timer_lock
);
1096 if (conn
->nopin_timer_flags
& ISCSI_TF_RUNNING
) {
1097 spin_unlock_bh(&conn
->nopin_timer_lock
);
1101 init_timer(&conn
->nopin_timer
);
1102 conn
->nopin_timer
.expires
= (get_jiffies_64() + na
->nopin_timeout
* HZ
);
1103 conn
->nopin_timer
.data
= (unsigned long)conn
;
1104 conn
->nopin_timer
.function
= iscsit_handle_nopin_timeout
;
1105 conn
->nopin_timer_flags
&= ~ISCSI_TF_STOP
;
1106 conn
->nopin_timer_flags
|= ISCSI_TF_RUNNING
;
1107 add_timer(&conn
->nopin_timer
);
1109 pr_debug("Started NOPIN Timer on CID: %d at %u second"
1110 " interval\n", conn
->cid
, na
->nopin_timeout
);
1111 spin_unlock_bh(&conn
->nopin_timer_lock
);
1114 void iscsit_stop_nopin_timer(struct iscsi_conn
*conn
)
1116 spin_lock_bh(&conn
->nopin_timer_lock
);
1117 if (!(conn
->nopin_timer_flags
& ISCSI_TF_RUNNING
)) {
1118 spin_unlock_bh(&conn
->nopin_timer_lock
);
1121 conn
->nopin_timer_flags
|= ISCSI_TF_STOP
;
1122 spin_unlock_bh(&conn
->nopin_timer_lock
);
1124 del_timer_sync(&conn
->nopin_timer
);
1126 spin_lock_bh(&conn
->nopin_timer_lock
);
1127 conn
->nopin_timer_flags
&= ~ISCSI_TF_RUNNING
;
1128 spin_unlock_bh(&conn
->nopin_timer_lock
);
1131 int iscsit_send_tx_data(
1132 struct iscsi_cmd
*cmd
,
1133 struct iscsi_conn
*conn
,
1136 int tx_sent
, tx_size
;
1141 tx_size
= cmd
->tx_size
;
1144 iov
= &cmd
->iov_data
[0];
1145 iov_count
= cmd
->iov_data_count
;
1147 iov
= &cmd
->iov_misc
[0];
1148 iov_count
= cmd
->iov_misc_count
;
1151 tx_sent
= tx_data(conn
, &iov
[0], iov_count
, tx_size
);
1152 if (tx_size
!= tx_sent
) {
1153 if (tx_sent
== -EAGAIN
) {
1154 pr_err("tx_data() returned -EAGAIN\n");
1164 int iscsit_fe_sendpage_sg(
1165 struct iscsi_cmd
*cmd
,
1166 struct iscsi_conn
*conn
)
1168 struct scatterlist
*sg
= cmd
->first_data_sg
;
1170 u32 tx_hdr_size
, data_len
;
1171 u32 offset
= cmd
->first_data_sg_off
;
1172 int tx_sent
, iov_off
;
1175 tx_hdr_size
= ISCSI_HDR_LEN
;
1176 if (conn
->conn_ops
->HeaderDigest
)
1177 tx_hdr_size
+= ISCSI_CRC_LEN
;
1179 iov
.iov_base
= cmd
->pdu
;
1180 iov
.iov_len
= tx_hdr_size
;
1182 tx_sent
= tx_data(conn
, &iov
, 1, tx_hdr_size
);
1183 if (tx_hdr_size
!= tx_sent
) {
1184 if (tx_sent
== -EAGAIN
) {
1185 pr_err("tx_data() returned -EAGAIN\n");
1191 data_len
= cmd
->tx_size
- tx_hdr_size
- cmd
->padding
;
1193 * Set iov_off used by padding and data digest tx_data() calls below
1194 * in order to determine proper offset into cmd->iov_data[]
1196 if (conn
->conn_ops
->DataDigest
) {
1197 data_len
-= ISCSI_CRC_LEN
;
1199 iov_off
= (cmd
->iov_data_count
- 2);
1201 iov_off
= (cmd
->iov_data_count
- 1);
1203 iov_off
= (cmd
->iov_data_count
- 1);
1206 * Perform sendpage() for each page in the scatterlist
1209 u32 space
= (sg
->length
- offset
);
1210 u32 sub_len
= min_t(u32
, data_len
, space
);
1212 tx_sent
= conn
->sock
->ops
->sendpage(conn
->sock
,
1213 sg_page(sg
), sg
->offset
+ offset
, sub_len
, 0);
1214 if (tx_sent
!= sub_len
) {
1215 if (tx_sent
== -EAGAIN
) {
1216 pr_err("tcp_sendpage() returned"
1221 pr_err("tcp_sendpage() failure: %d\n",
1226 data_len
-= sub_len
;
1233 struct kvec
*iov_p
= &cmd
->iov_data
[iov_off
++];
1235 tx_sent
= tx_data(conn
, iov_p
, 1, cmd
->padding
);
1236 if (cmd
->padding
!= tx_sent
) {
1237 if (tx_sent
== -EAGAIN
) {
1238 pr_err("tx_data() returned -EAGAIN\n");
1246 if (conn
->conn_ops
->DataDigest
) {
1247 struct kvec
*iov_d
= &cmd
->iov_data
[iov_off
];
1249 tx_sent
= tx_data(conn
, iov_d
, 1, ISCSI_CRC_LEN
);
1250 if (ISCSI_CRC_LEN
!= tx_sent
) {
1251 if (tx_sent
== -EAGAIN
) {
1252 pr_err("tx_data() returned -EAGAIN\n");
1263 * This function is used for mainly sending a ISCSI_TARG_LOGIN_RSP PDU
1264 * back to the Initiator when an expection condition occurs with the
1265 * errors set in status_class and status_detail.
1267 * Parameters: iSCSI Connection, Status Class, Status Detail.
1268 * Returns: 0 on success, -1 on error.
1270 int iscsit_tx_login_rsp(struct iscsi_conn
*conn
, u8 status_class
, u8 status_detail
)
1272 struct iscsi_login_rsp
*hdr
;
1273 struct iscsi_login
*login
= conn
->conn_login
;
1275 login
->login_failed
= 1;
1276 iscsit_collect_login_stats(conn
, status_class
, status_detail
);
1278 hdr
= (struct iscsi_login_rsp
*)&login
->rsp
[0];
1279 hdr
->opcode
= ISCSI_OP_LOGIN_RSP
;
1280 hdr
->status_class
= status_class
;
1281 hdr
->status_detail
= status_detail
;
1282 hdr
->itt
= conn
->login_itt
;
1284 return conn
->conn_transport
->iscsit_put_login_tx(conn
, login
, 0);
1287 void iscsit_print_session_params(struct iscsi_session
*sess
)
1289 struct iscsi_conn
*conn
;
1291 pr_debug("-----------------------------[Session Params for"
1292 " SID: %u]-----------------------------\n", sess
->sid
);
1293 spin_lock_bh(&sess
->conn_lock
);
1294 list_for_each_entry(conn
, &sess
->sess_conn_list
, conn_list
)
1295 iscsi_dump_conn_ops(conn
->conn_ops
);
1296 spin_unlock_bh(&sess
->conn_lock
);
1298 iscsi_dump_sess_ops(sess
->sess_ops
);
1301 static int iscsit_do_rx_data(
1302 struct iscsi_conn
*conn
,
1303 struct iscsi_data_count
*count
)
1305 int data
= count
->data_length
, rx_loop
= 0, total_rx
= 0, iov_len
;
1309 if (!conn
|| !conn
->sock
|| !conn
->conn_ops
)
1312 memset(&msg
, 0, sizeof(struct msghdr
));
1315 iov_len
= count
->iov_count
;
1317 while (total_rx
< data
) {
1318 rx_loop
= kernel_recvmsg(conn
->sock
, &msg
, iov_p
, iov_len
,
1319 (data
- total_rx
), MSG_WAITALL
);
1321 pr_debug("rx_loop: %d total_rx: %d\n",
1325 total_rx
+= rx_loop
;
1326 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n",
1327 rx_loop
, total_rx
, data
);
1333 static int iscsit_do_tx_data(
1334 struct iscsi_conn
*conn
,
1335 struct iscsi_data_count
*count
)
1337 int data
= count
->data_length
, total_tx
= 0, tx_loop
= 0, iov_len
;
1341 if (!conn
|| !conn
->sock
|| !conn
->conn_ops
)
1345 pr_err("Data length is: %d\n", data
);
1349 memset(&msg
, 0, sizeof(struct msghdr
));
1352 iov_len
= count
->iov_count
;
1354 while (total_tx
< data
) {
1355 tx_loop
= kernel_sendmsg(conn
->sock
, &msg
, iov_p
, iov_len
,
1358 pr_debug("tx_loop: %d total_tx %d\n",
1362 total_tx
+= tx_loop
;
1363 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n",
1364 tx_loop
, total_tx
, data
);
1371 struct iscsi_conn
*conn
,
1376 struct iscsi_data_count c
;
1378 if (!conn
|| !conn
->sock
|| !conn
->conn_ops
)
1381 memset(&c
, 0, sizeof(struct iscsi_data_count
));
1383 c
.iov_count
= iov_count
;
1384 c
.data_length
= data
;
1385 c
.type
= ISCSI_RX_DATA
;
1387 return iscsit_do_rx_data(conn
, &c
);
1391 struct iscsi_conn
*conn
,
1396 struct iscsi_data_count c
;
1398 if (!conn
|| !conn
->sock
|| !conn
->conn_ops
)
1401 memset(&c
, 0, sizeof(struct iscsi_data_count
));
1403 c
.iov_count
= iov_count
;
1404 c
.data_length
= data
;
1405 c
.type
= ISCSI_TX_DATA
;
1407 return iscsit_do_tx_data(conn
, &c
);
1410 void iscsit_collect_login_stats(
1411 struct iscsi_conn
*conn
,
1415 struct iscsi_param
*intrname
= NULL
;
1416 struct iscsi_tiqn
*tiqn
;
1417 struct iscsi_login_stats
*ls
;
1419 tiqn
= iscsit_snmp_get_tiqn(conn
);
1423 ls
= &tiqn
->login_stats
;
1425 spin_lock(&ls
->lock
);
1426 if (!strcmp(conn
->login_ip
, ls
->last_intr_fail_ip_addr
) &&
1427 ((get_jiffies_64() - ls
->last_fail_time
) < 10)) {
1428 /* We already have the failure info for this login */
1429 spin_unlock(&ls
->lock
);
1433 if (status_class
== ISCSI_STATUS_CLS_SUCCESS
)
1435 else if (status_class
== ISCSI_STATUS_CLS_REDIRECT
) {
1437 ls
->last_fail_type
= ISCSI_LOGIN_FAIL_REDIRECT
;
1438 } else if ((status_class
== ISCSI_STATUS_CLS_INITIATOR_ERR
) &&
1439 (status_detail
== ISCSI_LOGIN_STATUS_AUTH_FAILED
)) {
1440 ls
->authenticate_fails
++;
1441 ls
->last_fail_type
= ISCSI_LOGIN_FAIL_AUTHENTICATE
;
1442 } else if ((status_class
== ISCSI_STATUS_CLS_INITIATOR_ERR
) &&
1443 (status_detail
== ISCSI_LOGIN_STATUS_TGT_FORBIDDEN
)) {
1444 ls
->authorize_fails
++;
1445 ls
->last_fail_type
= ISCSI_LOGIN_FAIL_AUTHORIZE
;
1446 } else if ((status_class
== ISCSI_STATUS_CLS_INITIATOR_ERR
) &&
1447 (status_detail
== ISCSI_LOGIN_STATUS_INIT_ERR
)) {
1448 ls
->negotiate_fails
++;
1449 ls
->last_fail_type
= ISCSI_LOGIN_FAIL_NEGOTIATE
;
1452 ls
->last_fail_type
= ISCSI_LOGIN_FAIL_OTHER
;
1455 /* Save initiator name, ip address and time, if it is a failed login */
1456 if (status_class
!= ISCSI_STATUS_CLS_SUCCESS
) {
1457 if (conn
->param_list
)
1458 intrname
= iscsi_find_param_from_key(INITIATORNAME
,
1460 strcpy(ls
->last_intr_fail_name
,
1461 (intrname
? intrname
->value
: "Unknown"));
1463 ls
->last_intr_fail_ip_family
= conn
->login_family
;
1465 snprintf(ls
->last_intr_fail_ip_addr
, IPV6_ADDRESS_SPACE
,
1466 "%s", conn
->login_ip
);
1467 ls
->last_fail_time
= get_jiffies_64();
1470 spin_unlock(&ls
->lock
);
1473 struct iscsi_tiqn
*iscsit_snmp_get_tiqn(struct iscsi_conn
*conn
)
1475 struct iscsi_portal_group
*tpg
;
1477 if (!conn
|| !conn
->sess
)
1480 tpg
= conn
->sess
->tpg
;
1487 return tpg
->tpg_tiqn
;