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11#include <linux/list.h>
12#include <linux/sched/signal.h>
13#include <net/ipv6.h>
14#include <scsi/scsi_tcq.h>
15#include <scsi/iscsi_proto.h>
16#include <target/target_core_base.h>
17#include <target/target_core_fabric.h>
18#include <target/iscsi/iscsi_transport.h>
19
20#include <target/iscsi/iscsi_target_core.h>
21#include "iscsi_target_parameters.h"
22#include "iscsi_target_seq_pdu_list.h"
23#include "iscsi_target_datain_values.h"
24#include "iscsi_target_erl0.h"
25#include "iscsi_target_erl1.h"
26#include "iscsi_target_erl2.h"
27#include "iscsi_target_tpg.h"
28#include "iscsi_target_util.h"
29#include "iscsi_target.h"
30
31extern struct list_head g_tiqn_list;
32extern spinlock_t tiqn_lock;
33
34int iscsit_add_r2t_to_list(
35 struct iscsi_cmd *cmd,
36 u32 offset,
37 u32 xfer_len,
38 int recovery,
39 u32 r2t_sn)
40{
41 struct iscsi_r2t *r2t;
42
43 lockdep_assert_held(&cmd->r2t_lock);
44
45 WARN_ON_ONCE((s32)xfer_len < 0);
46
47 r2t = kmem_cache_zalloc(lio_r2t_cache, GFP_ATOMIC);
48 if (!r2t) {
49 pr_err("Unable to allocate memory for struct iscsi_r2t.\n");
50 return -1;
51 }
52 INIT_LIST_HEAD(&r2t->r2t_list);
53
54 r2t->recovery_r2t = recovery;
55 r2t->r2t_sn = (!r2t_sn) ? cmd->r2t_sn++ : r2t_sn;
56 r2t->offset = offset;
57 r2t->xfer_len = xfer_len;
58 list_add_tail(&r2t->r2t_list, &cmd->cmd_r2t_list);
59 spin_unlock_bh(&cmd->r2t_lock);
60
61 iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, ISTATE_SEND_R2T);
62
63 spin_lock_bh(&cmd->r2t_lock);
64 return 0;
65}
66
67struct iscsi_r2t *iscsit_get_r2t_for_eos(
68 struct iscsi_cmd *cmd,
69 u32 offset,
70 u32 length)
71{
72 struct iscsi_r2t *r2t;
73
74 spin_lock_bh(&cmd->r2t_lock);
75 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
76 if ((r2t->offset <= offset) &&
77 (r2t->offset + r2t->xfer_len) >= (offset + length)) {
78 spin_unlock_bh(&cmd->r2t_lock);
79 return r2t;
80 }
81 }
82 spin_unlock_bh(&cmd->r2t_lock);
83
84 pr_err("Unable to locate R2T for Offset: %u, Length:"
85 " %u\n", offset, length);
86 return NULL;
87}
88
89struct iscsi_r2t *iscsit_get_r2t_from_list(struct iscsi_cmd *cmd)
90{
91 struct iscsi_r2t *r2t;
92
93 spin_lock_bh(&cmd->r2t_lock);
94 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
95 if (!r2t->sent_r2t) {
96 spin_unlock_bh(&cmd->r2t_lock);
97 return r2t;
98 }
99 }
100 spin_unlock_bh(&cmd->r2t_lock);
101
102 pr_err("Unable to locate next R2T to send for ITT:"
103 " 0x%08x.\n", cmd->init_task_tag);
104 return NULL;
105}
106
107void iscsit_free_r2t(struct iscsi_r2t *r2t, struct iscsi_cmd *cmd)
108{
109 lockdep_assert_held(&cmd->r2t_lock);
110
111 list_del(&r2t->r2t_list);
112 kmem_cache_free(lio_r2t_cache, r2t);
113}
114
115void iscsit_free_r2ts_from_list(struct iscsi_cmd *cmd)
116{
117 struct iscsi_r2t *r2t, *r2t_tmp;
118
119 spin_lock_bh(&cmd->r2t_lock);
120 list_for_each_entry_safe(r2t, r2t_tmp, &cmd->cmd_r2t_list, r2t_list)
121 iscsit_free_r2t(r2t, cmd);
122 spin_unlock_bh(&cmd->r2t_lock);
123}
124
125static int iscsit_wait_for_tag(struct se_session *se_sess, int state, int *cpup)
126{
127 int tag = -1;
128 DEFINE_SBQ_WAIT(wait);
129 struct sbq_wait_state *ws;
130 struct sbitmap_queue *sbq;
131
132 if (state == TASK_RUNNING)
133 return tag;
134
135 sbq = &se_sess->sess_tag_pool;
136 ws = &sbq->ws[0];
137 for (;;) {
138 sbitmap_prepare_to_wait(sbq, ws, &wait, state);
139 if (signal_pending_state(state, current))
140 break;
141 tag = sbitmap_queue_get(sbq, cpup);
142 if (tag >= 0)
143 break;
144 schedule();
145 }
146
147 sbitmap_finish_wait(sbq, ws, &wait);
148 return tag;
149}
150
151
152
153
154
155struct iscsi_cmd *iscsit_allocate_cmd(struct iscsi_conn *conn, int state)
156{
157 struct iscsi_cmd *cmd;
158 struct se_session *se_sess = conn->sess->se_sess;
159 int size, tag, cpu;
160
161 tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
162 if (tag < 0)
163 tag = iscsit_wait_for_tag(se_sess, state, &cpu);
164 if (tag < 0)
165 return NULL;
166
167 size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size;
168 cmd = (struct iscsi_cmd *)(se_sess->sess_cmd_map + (tag * size));
169 memset(cmd, 0, size);
170
171 cmd->se_cmd.map_tag = tag;
172 cmd->se_cmd.map_cpu = cpu;
173 cmd->conn = conn;
174 cmd->data_direction = DMA_NONE;
175 INIT_LIST_HEAD(&cmd->i_conn_node);
176 INIT_LIST_HEAD(&cmd->datain_list);
177 INIT_LIST_HEAD(&cmd->cmd_r2t_list);
178 spin_lock_init(&cmd->datain_lock);
179 spin_lock_init(&cmd->dataout_timeout_lock);
180 spin_lock_init(&cmd->istate_lock);
181 spin_lock_init(&cmd->error_lock);
182 spin_lock_init(&cmd->r2t_lock);
183 timer_setup(&cmd->dataout_timer, iscsit_handle_dataout_timeout, 0);
184
185 return cmd;
186}
187EXPORT_SYMBOL(iscsit_allocate_cmd);
188
189struct iscsi_seq *iscsit_get_seq_holder_for_datain(
190 struct iscsi_cmd *cmd,
191 u32 seq_send_order)
192{
193 u32 i;
194
195 for (i = 0; i < cmd->seq_count; i++)
196 if (cmd->seq_list[i].seq_send_order == seq_send_order)
197 return &cmd->seq_list[i];
198
199 return NULL;
200}
201
202struct iscsi_seq *iscsit_get_seq_holder_for_r2t(struct iscsi_cmd *cmd)
203{
204 u32 i;
205
206 if (!cmd->seq_list) {
207 pr_err("struct iscsi_cmd->seq_list is NULL!\n");
208 return NULL;
209 }
210
211 for (i = 0; i < cmd->seq_count; i++) {
212 if (cmd->seq_list[i].type != SEQTYPE_NORMAL)
213 continue;
214 if (cmd->seq_list[i].seq_send_order == cmd->seq_send_order) {
215 cmd->seq_send_order++;
216 return &cmd->seq_list[i];
217 }
218 }
219
220 return NULL;
221}
222
223struct iscsi_r2t *iscsit_get_holder_for_r2tsn(
224 struct iscsi_cmd *cmd,
225 u32 r2t_sn)
226{
227 struct iscsi_r2t *r2t;
228
229 spin_lock_bh(&cmd->r2t_lock);
230 list_for_each_entry(r2t, &cmd->cmd_r2t_list, r2t_list) {
231 if (r2t->r2t_sn == r2t_sn) {
232 spin_unlock_bh(&cmd->r2t_lock);
233 return r2t;
234 }
235 }
236 spin_unlock_bh(&cmd->r2t_lock);
237
238 return NULL;
239}
240
241static inline int iscsit_check_received_cmdsn(struct iscsi_session *sess, u32 cmdsn)
242{
243 u32 max_cmdsn;
244 int ret;
245
246
247
248
249
250
251
252 max_cmdsn = atomic_read(&sess->max_cmd_sn);
253 if (iscsi_sna_gt(cmdsn, max_cmdsn)) {
254 pr_err("Received CmdSN: 0x%08x is greater than"
255 " MaxCmdSN: 0x%08x, ignoring.\n", cmdsn, max_cmdsn);
256 ret = CMDSN_MAXCMDSN_OVERRUN;
257
258 } else if (cmdsn == sess->exp_cmd_sn) {
259 sess->exp_cmd_sn++;
260 pr_debug("Received CmdSN matches ExpCmdSN,"
261 " incremented ExpCmdSN to: 0x%08x\n",
262 sess->exp_cmd_sn);
263 ret = CMDSN_NORMAL_OPERATION;
264
265 } else if (iscsi_sna_gt(cmdsn, sess->exp_cmd_sn)) {
266 pr_debug("Received CmdSN: 0x%08x is greater"
267 " than ExpCmdSN: 0x%08x, not acknowledging.\n",
268 cmdsn, sess->exp_cmd_sn);
269 ret = CMDSN_HIGHER_THAN_EXP;
270
271 } else {
272 pr_err("Received CmdSN: 0x%08x is less than"
273 " ExpCmdSN: 0x%08x, ignoring.\n", cmdsn,
274 sess->exp_cmd_sn);
275 ret = CMDSN_LOWER_THAN_EXP;
276 }
277
278 return ret;
279}
280
281
282
283
284
285int iscsit_sequence_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
286 unsigned char *buf, __be32 cmdsn)
287{
288 int ret, cmdsn_ret;
289 bool reject = false;
290 u8 reason = ISCSI_REASON_BOOKMARK_NO_RESOURCES;
291
292 mutex_lock(&conn->sess->cmdsn_mutex);
293
294 cmdsn_ret = iscsit_check_received_cmdsn(conn->sess, be32_to_cpu(cmdsn));
295 switch (cmdsn_ret) {
296 case CMDSN_NORMAL_OPERATION:
297 ret = iscsit_execute_cmd(cmd, 0);
298 if ((ret >= 0) && !list_empty(&conn->sess->sess_ooo_cmdsn_list))
299 iscsit_execute_ooo_cmdsns(conn->sess);
300 else if (ret < 0) {
301 reject = true;
302 ret = CMDSN_ERROR_CANNOT_RECOVER;
303 }
304 break;
305 case CMDSN_HIGHER_THAN_EXP:
306 ret = iscsit_handle_ooo_cmdsn(conn->sess, cmd, be32_to_cpu(cmdsn));
307 if (ret < 0) {
308 reject = true;
309 ret = CMDSN_ERROR_CANNOT_RECOVER;
310 break;
311 }
312 ret = CMDSN_HIGHER_THAN_EXP;
313 break;
314 case CMDSN_LOWER_THAN_EXP:
315 case CMDSN_MAXCMDSN_OVERRUN:
316 default:
317 cmd->i_state = ISTATE_REMOVE;
318 iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
319
320
321
322
323
324 ret = CMDSN_LOWER_THAN_EXP;
325 break;
326 }
327 mutex_unlock(&conn->sess->cmdsn_mutex);
328
329 if (reject)
330 iscsit_reject_cmd(cmd, reason, buf);
331
332 return ret;
333}
334EXPORT_SYMBOL(iscsit_sequence_cmd);
335
336int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf)
337{
338 struct iscsi_conn *conn = cmd->conn;
339 struct se_cmd *se_cmd = &cmd->se_cmd;
340 struct iscsi_data *hdr = (struct iscsi_data *) buf;
341 u32 payload_length = ntoh24(hdr->dlength);
342
343 if (conn->sess->sess_ops->InitialR2T) {
344 pr_err("Received unexpected unsolicited data"
345 " while InitialR2T=Yes, protocol error.\n");
346 transport_send_check_condition_and_sense(se_cmd,
347 TCM_UNEXPECTED_UNSOLICITED_DATA, 0);
348 return -1;
349 }
350
351 if ((cmd->first_burst_len + payload_length) >
352 conn->sess->sess_ops->FirstBurstLength) {
353 pr_err("Total %u bytes exceeds FirstBurstLength: %u"
354 " for this Unsolicited DataOut Burst.\n",
355 (cmd->first_burst_len + payload_length),
356 conn->sess->sess_ops->FirstBurstLength);
357 transport_send_check_condition_and_sense(se_cmd,
358 TCM_INCORRECT_AMOUNT_OF_DATA, 0);
359 return -1;
360 }
361
362 if (!(hdr->flags & ISCSI_FLAG_CMD_FINAL))
363 return 0;
364
365 if (((cmd->first_burst_len + payload_length) != cmd->se_cmd.data_length) &&
366 ((cmd->first_burst_len + payload_length) !=
367 conn->sess->sess_ops->FirstBurstLength)) {
368 pr_err("Unsolicited non-immediate data received %u"
369 " does not equal FirstBurstLength: %u, and does"
370 " not equal ExpXferLen %u.\n",
371 (cmd->first_burst_len + payload_length),
372 conn->sess->sess_ops->FirstBurstLength, cmd->se_cmd.data_length);
373 transport_send_check_condition_and_sense(se_cmd,
374 TCM_INCORRECT_AMOUNT_OF_DATA, 0);
375 return -1;
376 }
377 return 0;
378}
379
380struct iscsi_cmd *iscsit_find_cmd_from_itt(
381 struct iscsi_conn *conn,
382 itt_t init_task_tag)
383{
384 struct iscsi_cmd *cmd;
385
386 spin_lock_bh(&conn->cmd_lock);
387 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
388 if (cmd->init_task_tag == init_task_tag) {
389 spin_unlock_bh(&conn->cmd_lock);
390 return cmd;
391 }
392 }
393 spin_unlock_bh(&conn->cmd_lock);
394
395 pr_err("Unable to locate ITT: 0x%08x on CID: %hu",
396 init_task_tag, conn->cid);
397 return NULL;
398}
399EXPORT_SYMBOL(iscsit_find_cmd_from_itt);
400
401struct iscsi_cmd *iscsit_find_cmd_from_itt_or_dump(
402 struct iscsi_conn *conn,
403 itt_t init_task_tag,
404 u32 length)
405{
406 struct iscsi_cmd *cmd;
407
408 spin_lock_bh(&conn->cmd_lock);
409 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
410 if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT)
411 continue;
412 if (cmd->init_task_tag == init_task_tag) {
413 spin_unlock_bh(&conn->cmd_lock);
414 return cmd;
415 }
416 }
417 spin_unlock_bh(&conn->cmd_lock);
418
419 pr_err("Unable to locate ITT: 0x%08x on CID: %hu,"
420 " dumping payload\n", init_task_tag, conn->cid);
421 if (length)
422 iscsit_dump_data_payload(conn, length, 1);
423
424 return NULL;
425}
426EXPORT_SYMBOL(iscsit_find_cmd_from_itt_or_dump);
427
428struct iscsi_cmd *iscsit_find_cmd_from_ttt(
429 struct iscsi_conn *conn,
430 u32 targ_xfer_tag)
431{
432 struct iscsi_cmd *cmd = NULL;
433
434 spin_lock_bh(&conn->cmd_lock);
435 list_for_each_entry(cmd, &conn->conn_cmd_list, i_conn_node) {
436 if (cmd->targ_xfer_tag == targ_xfer_tag) {
437 spin_unlock_bh(&conn->cmd_lock);
438 return cmd;
439 }
440 }
441 spin_unlock_bh(&conn->cmd_lock);
442
443 pr_err("Unable to locate TTT: 0x%08x on CID: %hu\n",
444 targ_xfer_tag, conn->cid);
445 return NULL;
446}
447
448int iscsit_find_cmd_for_recovery(
449 struct iscsi_session *sess,
450 struct iscsi_cmd **cmd_ptr,
451 struct iscsi_conn_recovery **cr_ptr,
452 itt_t init_task_tag)
453{
454 struct iscsi_cmd *cmd = NULL;
455 struct iscsi_conn_recovery *cr;
456
457
458
459
460 spin_lock(&sess->cr_i_lock);
461 list_for_each_entry(cr, &sess->cr_inactive_list, cr_list) {
462 spin_lock(&cr->conn_recovery_cmd_lock);
463 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) {
464 if (cmd->init_task_tag == init_task_tag) {
465 spin_unlock(&cr->conn_recovery_cmd_lock);
466 spin_unlock(&sess->cr_i_lock);
467
468 *cr_ptr = cr;
469 *cmd_ptr = cmd;
470 return -2;
471 }
472 }
473 spin_unlock(&cr->conn_recovery_cmd_lock);
474 }
475 spin_unlock(&sess->cr_i_lock);
476
477
478
479
480 spin_lock(&sess->cr_a_lock);
481 list_for_each_entry(cr, &sess->cr_active_list, cr_list) {
482 spin_lock(&cr->conn_recovery_cmd_lock);
483 list_for_each_entry(cmd, &cr->conn_recovery_cmd_list, i_conn_node) {
484 if (cmd->init_task_tag == init_task_tag) {
485 spin_unlock(&cr->conn_recovery_cmd_lock);
486 spin_unlock(&sess->cr_a_lock);
487
488 *cr_ptr = cr;
489 *cmd_ptr = cmd;
490 return 0;
491 }
492 }
493 spin_unlock(&cr->conn_recovery_cmd_lock);
494 }
495 spin_unlock(&sess->cr_a_lock);
496
497 return -1;
498}
499
500void iscsit_add_cmd_to_immediate_queue(
501 struct iscsi_cmd *cmd,
502 struct iscsi_conn *conn,
503 u8 state)
504{
505 struct iscsi_queue_req *qr;
506
507 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
508 if (!qr) {
509 pr_err("Unable to allocate memory for"
510 " struct iscsi_queue_req\n");
511 return;
512 }
513 INIT_LIST_HEAD(&qr->qr_list);
514 qr->cmd = cmd;
515 qr->state = state;
516
517 spin_lock_bh(&conn->immed_queue_lock);
518 list_add_tail(&qr->qr_list, &conn->immed_queue_list);
519 atomic_inc(&cmd->immed_queue_count);
520 atomic_set(&conn->check_immediate_queue, 1);
521 spin_unlock_bh(&conn->immed_queue_lock);
522
523 wake_up(&conn->queues_wq);
524}
525EXPORT_SYMBOL(iscsit_add_cmd_to_immediate_queue);
526
527struct iscsi_queue_req *iscsit_get_cmd_from_immediate_queue(struct iscsi_conn *conn)
528{
529 struct iscsi_queue_req *qr;
530
531 spin_lock_bh(&conn->immed_queue_lock);
532 if (list_empty(&conn->immed_queue_list)) {
533 spin_unlock_bh(&conn->immed_queue_lock);
534 return NULL;
535 }
536 qr = list_first_entry(&conn->immed_queue_list,
537 struct iscsi_queue_req, qr_list);
538
539 list_del(&qr->qr_list);
540 if (qr->cmd)
541 atomic_dec(&qr->cmd->immed_queue_count);
542 spin_unlock_bh(&conn->immed_queue_lock);
543
544 return qr;
545}
546
547static void iscsit_remove_cmd_from_immediate_queue(
548 struct iscsi_cmd *cmd,
549 struct iscsi_conn *conn)
550{
551 struct iscsi_queue_req *qr, *qr_tmp;
552
553 spin_lock_bh(&conn->immed_queue_lock);
554 if (!atomic_read(&cmd->immed_queue_count)) {
555 spin_unlock_bh(&conn->immed_queue_lock);
556 return;
557 }
558
559 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
560 if (qr->cmd != cmd)
561 continue;
562
563 atomic_dec(&qr->cmd->immed_queue_count);
564 list_del(&qr->qr_list);
565 kmem_cache_free(lio_qr_cache, qr);
566 }
567 spin_unlock_bh(&conn->immed_queue_lock);
568
569 if (atomic_read(&cmd->immed_queue_count)) {
570 pr_err("ITT: 0x%08x immed_queue_count: %d\n",
571 cmd->init_task_tag,
572 atomic_read(&cmd->immed_queue_count));
573 }
574}
575
576int iscsit_add_cmd_to_response_queue(
577 struct iscsi_cmd *cmd,
578 struct iscsi_conn *conn,
579 u8 state)
580{
581 struct iscsi_queue_req *qr;
582
583 qr = kmem_cache_zalloc(lio_qr_cache, GFP_ATOMIC);
584 if (!qr) {
585 pr_err("Unable to allocate memory for"
586 " struct iscsi_queue_req\n");
587 return -ENOMEM;
588 }
589 INIT_LIST_HEAD(&qr->qr_list);
590 qr->cmd = cmd;
591 qr->state = state;
592
593 spin_lock_bh(&conn->response_queue_lock);
594 list_add_tail(&qr->qr_list, &conn->response_queue_list);
595 atomic_inc(&cmd->response_queue_count);
596 spin_unlock_bh(&conn->response_queue_lock);
597
598 wake_up(&conn->queues_wq);
599 return 0;
600}
601
602struct iscsi_queue_req *iscsit_get_cmd_from_response_queue(struct iscsi_conn *conn)
603{
604 struct iscsi_queue_req *qr;
605
606 spin_lock_bh(&conn->response_queue_lock);
607 if (list_empty(&conn->response_queue_list)) {
608 spin_unlock_bh(&conn->response_queue_lock);
609 return NULL;
610 }
611
612 qr = list_first_entry(&conn->response_queue_list,
613 struct iscsi_queue_req, qr_list);
614
615 list_del(&qr->qr_list);
616 if (qr->cmd)
617 atomic_dec(&qr->cmd->response_queue_count);
618 spin_unlock_bh(&conn->response_queue_lock);
619
620 return qr;
621}
622
623static void iscsit_remove_cmd_from_response_queue(
624 struct iscsi_cmd *cmd,
625 struct iscsi_conn *conn)
626{
627 struct iscsi_queue_req *qr, *qr_tmp;
628
629 spin_lock_bh(&conn->response_queue_lock);
630 if (!atomic_read(&cmd->response_queue_count)) {
631 spin_unlock_bh(&conn->response_queue_lock);
632 return;
633 }
634
635 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
636 qr_list) {
637 if (qr->cmd != cmd)
638 continue;
639
640 atomic_dec(&qr->cmd->response_queue_count);
641 list_del(&qr->qr_list);
642 kmem_cache_free(lio_qr_cache, qr);
643 }
644 spin_unlock_bh(&conn->response_queue_lock);
645
646 if (atomic_read(&cmd->response_queue_count)) {
647 pr_err("ITT: 0x%08x response_queue_count: %d\n",
648 cmd->init_task_tag,
649 atomic_read(&cmd->response_queue_count));
650 }
651}
652
653bool iscsit_conn_all_queues_empty(struct iscsi_conn *conn)
654{
655 bool empty;
656
657 spin_lock_bh(&conn->immed_queue_lock);
658 empty = list_empty(&conn->immed_queue_list);
659 spin_unlock_bh(&conn->immed_queue_lock);
660
661 if (!empty)
662 return empty;
663
664 spin_lock_bh(&conn->response_queue_lock);
665 empty = list_empty(&conn->response_queue_list);
666 spin_unlock_bh(&conn->response_queue_lock);
667
668 return empty;
669}
670
671void iscsit_free_queue_reqs_for_conn(struct iscsi_conn *conn)
672{
673 struct iscsi_queue_req *qr, *qr_tmp;
674
675 spin_lock_bh(&conn->immed_queue_lock);
676 list_for_each_entry_safe(qr, qr_tmp, &conn->immed_queue_list, qr_list) {
677 list_del(&qr->qr_list);
678 if (qr->cmd)
679 atomic_dec(&qr->cmd->immed_queue_count);
680
681 kmem_cache_free(lio_qr_cache, qr);
682 }
683 spin_unlock_bh(&conn->immed_queue_lock);
684
685 spin_lock_bh(&conn->response_queue_lock);
686 list_for_each_entry_safe(qr, qr_tmp, &conn->response_queue_list,
687 qr_list) {
688 list_del(&qr->qr_list);
689 if (qr->cmd)
690 atomic_dec(&qr->cmd->response_queue_count);
691
692 kmem_cache_free(lio_qr_cache, qr);
693 }
694 spin_unlock_bh(&conn->response_queue_lock);
695}
696
697void iscsit_release_cmd(struct iscsi_cmd *cmd)
698{
699 struct iscsi_session *sess;
700 struct se_cmd *se_cmd = &cmd->se_cmd;
701
702 WARN_ON(!list_empty(&cmd->i_conn_node));
703
704 if (cmd->conn)
705 sess = cmd->conn->sess;
706 else
707 sess = cmd->sess;
708
709 BUG_ON(!sess || !sess->se_sess);
710
711 kfree(cmd->buf_ptr);
712 kfree(cmd->pdu_list);
713 kfree(cmd->seq_list);
714 kfree(cmd->tmr_req);
715 kfree(cmd->overflow_buf);
716 kfree(cmd->iov_data);
717 kfree(cmd->text_in_ptr);
718
719 target_free_tag(sess->se_sess, se_cmd);
720}
721EXPORT_SYMBOL(iscsit_release_cmd);
722
723void __iscsit_free_cmd(struct iscsi_cmd *cmd, bool check_queues)
724{
725 struct iscsi_conn *conn = cmd->conn;
726
727 WARN_ON(!list_empty(&cmd->i_conn_node));
728
729 if (cmd->data_direction == DMA_TO_DEVICE) {
730 iscsit_stop_dataout_timer(cmd);
731 iscsit_free_r2ts_from_list(cmd);
732 }
733 if (cmd->data_direction == DMA_FROM_DEVICE)
734 iscsit_free_all_datain_reqs(cmd);
735
736 if (conn && check_queues) {
737 iscsit_remove_cmd_from_immediate_queue(cmd, conn);
738 iscsit_remove_cmd_from_response_queue(cmd, conn);
739 }
740
741 if (conn && conn->conn_transport->iscsit_unmap_cmd)
742 conn->conn_transport->iscsit_unmap_cmd(conn, cmd);
743}
744
745void iscsit_free_cmd(struct iscsi_cmd *cmd, bool shutdown)
746{
747 struct se_cmd *se_cmd = cmd->se_cmd.se_tfo ? &cmd->se_cmd : NULL;
748 int rc;
749
750 WARN_ON(!list_empty(&cmd->i_conn_node));
751
752 __iscsit_free_cmd(cmd, shutdown);
753 if (se_cmd) {
754 rc = transport_generic_free_cmd(se_cmd, shutdown);
755 if (!rc && shutdown && se_cmd->se_sess) {
756 __iscsit_free_cmd(cmd, shutdown);
757 target_put_sess_cmd(se_cmd);
758 }
759 } else {
760 iscsit_release_cmd(cmd);
761 }
762}
763EXPORT_SYMBOL(iscsit_free_cmd);
764
765bool iscsit_check_session_usage_count(struct iscsi_session *sess,
766 bool can_sleep)
767{
768 spin_lock_bh(&sess->session_usage_lock);
769 if (sess->session_usage_count != 0) {
770 sess->session_waiting_on_uc = 1;
771 spin_unlock_bh(&sess->session_usage_lock);
772 if (!can_sleep)
773 return true;
774
775 wait_for_completion(&sess->session_waiting_on_uc_comp);
776 return false;
777 }
778 spin_unlock_bh(&sess->session_usage_lock);
779
780 return false;
781}
782
783void iscsit_dec_session_usage_count(struct iscsi_session *sess)
784{
785 spin_lock_bh(&sess->session_usage_lock);
786 sess->session_usage_count--;
787
788 if (!sess->session_usage_count && sess->session_waiting_on_uc)
789 complete(&sess->session_waiting_on_uc_comp);
790
791 spin_unlock_bh(&sess->session_usage_lock);
792}
793
794void iscsit_inc_session_usage_count(struct iscsi_session *sess)
795{
796 spin_lock_bh(&sess->session_usage_lock);
797 sess->session_usage_count++;
798 spin_unlock_bh(&sess->session_usage_lock);
799}
800
801struct iscsi_conn *iscsit_get_conn_from_cid(struct iscsi_session *sess, u16 cid)
802{
803 struct iscsi_conn *conn;
804
805 spin_lock_bh(&sess->conn_lock);
806 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
807 if ((conn->cid == cid) &&
808 (conn->conn_state == TARG_CONN_STATE_LOGGED_IN)) {
809 iscsit_inc_conn_usage_count(conn);
810 spin_unlock_bh(&sess->conn_lock);
811 return conn;
812 }
813 }
814 spin_unlock_bh(&sess->conn_lock);
815
816 return NULL;
817}
818
819struct iscsi_conn *iscsit_get_conn_from_cid_rcfr(struct iscsi_session *sess, u16 cid)
820{
821 struct iscsi_conn *conn;
822
823 spin_lock_bh(&sess->conn_lock);
824 list_for_each_entry(conn, &sess->sess_conn_list, conn_list) {
825 if (conn->cid == cid) {
826 iscsit_inc_conn_usage_count(conn);
827 spin_lock(&conn->state_lock);
828 atomic_set(&conn->connection_wait_rcfr, 1);
829 spin_unlock(&conn->state_lock);
830 spin_unlock_bh(&sess->conn_lock);
831 return conn;
832 }
833 }
834 spin_unlock_bh(&sess->conn_lock);
835
836 return NULL;
837}
838
839void iscsit_check_conn_usage_count(struct iscsi_conn *conn)
840{
841 spin_lock_bh(&conn->conn_usage_lock);
842 if (conn->conn_usage_count != 0) {
843 conn->conn_waiting_on_uc = 1;
844 spin_unlock_bh(&conn->conn_usage_lock);
845
846 wait_for_completion(&conn->conn_waiting_on_uc_comp);
847 return;
848 }
849 spin_unlock_bh(&conn->conn_usage_lock);
850}
851
852void iscsit_dec_conn_usage_count(struct iscsi_conn *conn)
853{
854 spin_lock_bh(&conn->conn_usage_lock);
855 conn->conn_usage_count--;
856
857 if (!conn->conn_usage_count && conn->conn_waiting_on_uc)
858 complete(&conn->conn_waiting_on_uc_comp);
859
860 spin_unlock_bh(&conn->conn_usage_lock);
861}
862
863void iscsit_inc_conn_usage_count(struct iscsi_conn *conn)
864{
865 spin_lock_bh(&conn->conn_usage_lock);
866 conn->conn_usage_count++;
867 spin_unlock_bh(&conn->conn_usage_lock);
868}
869
870static int iscsit_add_nopin(struct iscsi_conn *conn, int want_response)
871{
872 u8 state;
873 struct iscsi_cmd *cmd;
874
875 cmd = iscsit_allocate_cmd(conn, TASK_RUNNING);
876 if (!cmd)
877 return -1;
878
879 cmd->iscsi_opcode = ISCSI_OP_NOOP_IN;
880 state = (want_response) ? ISTATE_SEND_NOPIN_WANT_RESPONSE :
881 ISTATE_SEND_NOPIN_NO_RESPONSE;
882 cmd->init_task_tag = RESERVED_ITT;
883 cmd->targ_xfer_tag = (want_response) ?
884 session_get_next_ttt(conn->sess) : 0xFFFFFFFF;
885 spin_lock_bh(&conn->cmd_lock);
886 list_add_tail(&cmd->i_conn_node, &conn->conn_cmd_list);
887 spin_unlock_bh(&conn->cmd_lock);
888
889 if (want_response)
890 iscsit_start_nopin_response_timer(conn);
891 iscsit_add_cmd_to_immediate_queue(cmd, conn, state);
892
893 return 0;
894}
895
896void iscsit_handle_nopin_response_timeout(struct timer_list *t)
897{
898 struct iscsi_conn *conn = from_timer(conn, t, nopin_response_timer);
899 struct iscsi_session *sess = conn->sess;
900
901 iscsit_inc_conn_usage_count(conn);
902
903 spin_lock_bh(&conn->nopin_timer_lock);
904 if (conn->nopin_response_timer_flags & ISCSI_TF_STOP) {
905 spin_unlock_bh(&conn->nopin_timer_lock);
906 iscsit_dec_conn_usage_count(conn);
907 return;
908 }
909
910 pr_err("Did not receive response to NOPIN on CID: %hu, failing"
911 " connection for I_T Nexus %s,i,0x%6phN,%s,t,0x%02x\n",
912 conn->cid, sess->sess_ops->InitiatorName, sess->isid,
913 sess->tpg->tpg_tiqn->tiqn, (u32)sess->tpg->tpgt);
914 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
915 spin_unlock_bh(&conn->nopin_timer_lock);
916
917 iscsit_fill_cxn_timeout_err_stats(sess);
918 iscsit_cause_connection_reinstatement(conn, 0);
919 iscsit_dec_conn_usage_count(conn);
920}
921
922void iscsit_mod_nopin_response_timer(struct iscsi_conn *conn)
923{
924 struct iscsi_session *sess = conn->sess;
925 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
926
927 spin_lock_bh(&conn->nopin_timer_lock);
928 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
929 spin_unlock_bh(&conn->nopin_timer_lock);
930 return;
931 }
932
933 mod_timer(&conn->nopin_response_timer,
934 (get_jiffies_64() + na->nopin_response_timeout * HZ));
935 spin_unlock_bh(&conn->nopin_timer_lock);
936}
937
938void iscsit_start_nopin_response_timer(struct iscsi_conn *conn)
939{
940 struct iscsi_session *sess = conn->sess;
941 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
942
943 spin_lock_bh(&conn->nopin_timer_lock);
944 if (conn->nopin_response_timer_flags & ISCSI_TF_RUNNING) {
945 spin_unlock_bh(&conn->nopin_timer_lock);
946 return;
947 }
948
949 conn->nopin_response_timer_flags &= ~ISCSI_TF_STOP;
950 conn->nopin_response_timer_flags |= ISCSI_TF_RUNNING;
951 mod_timer(&conn->nopin_response_timer,
952 jiffies + na->nopin_response_timeout * HZ);
953
954 pr_debug("Started NOPIN Response Timer on CID: %d to %u"
955 " seconds\n", conn->cid, na->nopin_response_timeout);
956 spin_unlock_bh(&conn->nopin_timer_lock);
957}
958
959void iscsit_stop_nopin_response_timer(struct iscsi_conn *conn)
960{
961 spin_lock_bh(&conn->nopin_timer_lock);
962 if (!(conn->nopin_response_timer_flags & ISCSI_TF_RUNNING)) {
963 spin_unlock_bh(&conn->nopin_timer_lock);
964 return;
965 }
966 conn->nopin_response_timer_flags |= ISCSI_TF_STOP;
967 spin_unlock_bh(&conn->nopin_timer_lock);
968
969 del_timer_sync(&conn->nopin_response_timer);
970
971 spin_lock_bh(&conn->nopin_timer_lock);
972 conn->nopin_response_timer_flags &= ~ISCSI_TF_RUNNING;
973 spin_unlock_bh(&conn->nopin_timer_lock);
974}
975
976void iscsit_handle_nopin_timeout(struct timer_list *t)
977{
978 struct iscsi_conn *conn = from_timer(conn, t, nopin_timer);
979
980 iscsit_inc_conn_usage_count(conn);
981
982 spin_lock_bh(&conn->nopin_timer_lock);
983 if (conn->nopin_timer_flags & ISCSI_TF_STOP) {
984 spin_unlock_bh(&conn->nopin_timer_lock);
985 iscsit_dec_conn_usage_count(conn);
986 return;
987 }
988 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
989 spin_unlock_bh(&conn->nopin_timer_lock);
990
991 iscsit_add_nopin(conn, 1);
992 iscsit_dec_conn_usage_count(conn);
993}
994
995void __iscsit_start_nopin_timer(struct iscsi_conn *conn)
996{
997 struct iscsi_session *sess = conn->sess;
998 struct iscsi_node_attrib *na = iscsit_tpg_get_node_attrib(sess);
999
1000 lockdep_assert_held(&conn->nopin_timer_lock);
1001
1002
1003
1004
1005 if (!na->nopin_timeout)
1006 return;
1007
1008 if (conn->nopin_timer_flags & ISCSI_TF_RUNNING)
1009 return;
1010
1011 conn->nopin_timer_flags &= ~ISCSI_TF_STOP;
1012 conn->nopin_timer_flags |= ISCSI_TF_RUNNING;
1013 mod_timer(&conn->nopin_timer, jiffies + na->nopin_timeout * HZ);
1014
1015 pr_debug("Started NOPIN Timer on CID: %d at %u second"
1016 " interval\n", conn->cid, na->nopin_timeout);
1017}
1018
1019void iscsit_start_nopin_timer(struct iscsi_conn *conn)
1020{
1021 spin_lock_bh(&conn->nopin_timer_lock);
1022 __iscsit_start_nopin_timer(conn);
1023 spin_unlock_bh(&conn->nopin_timer_lock);
1024}
1025
1026void iscsit_stop_nopin_timer(struct iscsi_conn *conn)
1027{
1028 spin_lock_bh(&conn->nopin_timer_lock);
1029 if (!(conn->nopin_timer_flags & ISCSI_TF_RUNNING)) {
1030 spin_unlock_bh(&conn->nopin_timer_lock);
1031 return;
1032 }
1033 conn->nopin_timer_flags |= ISCSI_TF_STOP;
1034 spin_unlock_bh(&conn->nopin_timer_lock);
1035
1036 del_timer_sync(&conn->nopin_timer);
1037
1038 spin_lock_bh(&conn->nopin_timer_lock);
1039 conn->nopin_timer_flags &= ~ISCSI_TF_RUNNING;
1040 spin_unlock_bh(&conn->nopin_timer_lock);
1041}
1042
1043int iscsit_send_tx_data(
1044 struct iscsi_cmd *cmd,
1045 struct iscsi_conn *conn,
1046 int use_misc)
1047{
1048 int tx_sent, tx_size;
1049 u32 iov_count;
1050 struct kvec *iov;
1051
1052send_data:
1053 tx_size = cmd->tx_size;
1054
1055 if (!use_misc) {
1056 iov = &cmd->iov_data[0];
1057 iov_count = cmd->iov_data_count;
1058 } else {
1059 iov = &cmd->iov_misc[0];
1060 iov_count = cmd->iov_misc_count;
1061 }
1062
1063 tx_sent = tx_data(conn, &iov[0], iov_count, tx_size);
1064 if (tx_size != tx_sent) {
1065 if (tx_sent == -EAGAIN) {
1066 pr_err("tx_data() returned -EAGAIN\n");
1067 goto send_data;
1068 } else
1069 return -1;
1070 }
1071 cmd->tx_size = 0;
1072
1073 return 0;
1074}
1075
1076int iscsit_fe_sendpage_sg(
1077 struct iscsi_cmd *cmd,
1078 struct iscsi_conn *conn)
1079{
1080 struct scatterlist *sg = cmd->first_data_sg;
1081 struct kvec iov;
1082 u32 tx_hdr_size, data_len;
1083 u32 offset = cmd->first_data_sg_off;
1084 int tx_sent, iov_off;
1085
1086send_hdr:
1087 tx_hdr_size = ISCSI_HDR_LEN;
1088 if (conn->conn_ops->HeaderDigest)
1089 tx_hdr_size += ISCSI_CRC_LEN;
1090
1091 iov.iov_base = cmd->pdu;
1092 iov.iov_len = tx_hdr_size;
1093
1094 tx_sent = tx_data(conn, &iov, 1, tx_hdr_size);
1095 if (tx_hdr_size != tx_sent) {
1096 if (tx_sent == -EAGAIN) {
1097 pr_err("tx_data() returned -EAGAIN\n");
1098 goto send_hdr;
1099 }
1100 return -1;
1101 }
1102
1103 data_len = cmd->tx_size - tx_hdr_size - cmd->padding;
1104
1105
1106
1107
1108 if (conn->conn_ops->DataDigest) {
1109 data_len -= ISCSI_CRC_LEN;
1110 if (cmd->padding)
1111 iov_off = (cmd->iov_data_count - 2);
1112 else
1113 iov_off = (cmd->iov_data_count - 1);
1114 } else {
1115 iov_off = (cmd->iov_data_count - 1);
1116 }
1117
1118
1119
1120 while (data_len) {
1121 u32 space = (sg->length - offset);
1122 u32 sub_len = min_t(u32, data_len, space);
1123send_pg:
1124 tx_sent = conn->sock->ops->sendpage(conn->sock,
1125 sg_page(sg), sg->offset + offset, sub_len, 0);
1126 if (tx_sent != sub_len) {
1127 if (tx_sent == -EAGAIN) {
1128 pr_err("tcp_sendpage() returned"
1129 " -EAGAIN\n");
1130 goto send_pg;
1131 }
1132
1133 pr_err("tcp_sendpage() failure: %d\n",
1134 tx_sent);
1135 return -1;
1136 }
1137
1138 data_len -= sub_len;
1139 offset = 0;
1140 sg = sg_next(sg);
1141 }
1142
1143send_padding:
1144 if (cmd->padding) {
1145 struct kvec *iov_p = &cmd->iov_data[iov_off++];
1146
1147 tx_sent = tx_data(conn, iov_p, 1, cmd->padding);
1148 if (cmd->padding != tx_sent) {
1149 if (tx_sent == -EAGAIN) {
1150 pr_err("tx_data() returned -EAGAIN\n");
1151 goto send_padding;
1152 }
1153 return -1;
1154 }
1155 }
1156
1157send_datacrc:
1158 if (conn->conn_ops->DataDigest) {
1159 struct kvec *iov_d = &cmd->iov_data[iov_off];
1160
1161 tx_sent = tx_data(conn, iov_d, 1, ISCSI_CRC_LEN);
1162 if (ISCSI_CRC_LEN != tx_sent) {
1163 if (tx_sent == -EAGAIN) {
1164 pr_err("tx_data() returned -EAGAIN\n");
1165 goto send_datacrc;
1166 }
1167 return -1;
1168 }
1169 }
1170
1171 return 0;
1172}
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182int iscsit_tx_login_rsp(struct iscsi_conn *conn, u8 status_class, u8 status_detail)
1183{
1184 struct iscsi_login_rsp *hdr;
1185 struct iscsi_login *login = conn->conn_login;
1186
1187 login->login_failed = 1;
1188 iscsit_collect_login_stats(conn, status_class, status_detail);
1189
1190 memset(&login->rsp[0], 0, ISCSI_HDR_LEN);
1191
1192 hdr = (struct iscsi_login_rsp *)&login->rsp[0];
1193 hdr->opcode = ISCSI_OP_LOGIN_RSP;
1194 hdr->status_class = status_class;
1195 hdr->status_detail = status_detail;
1196 hdr->itt = conn->login_itt;
1197
1198 return conn->conn_transport->iscsit_put_login_tx(conn, login, 0);
1199}
1200
1201void iscsit_print_session_params(struct iscsi_session *sess)
1202{
1203 struct iscsi_conn *conn;
1204
1205 pr_debug("-----------------------------[Session Params for"
1206 " SID: %u]-----------------------------\n", sess->sid);
1207 spin_lock_bh(&sess->conn_lock);
1208 list_for_each_entry(conn, &sess->sess_conn_list, conn_list)
1209 iscsi_dump_conn_ops(conn->conn_ops);
1210 spin_unlock_bh(&sess->conn_lock);
1211
1212 iscsi_dump_sess_ops(sess->sess_ops);
1213}
1214
1215int rx_data(
1216 struct iscsi_conn *conn,
1217 struct kvec *iov,
1218 int iov_count,
1219 int data)
1220{
1221 int rx_loop = 0, total_rx = 0;
1222 struct msghdr msg;
1223
1224 if (!conn || !conn->sock || !conn->conn_ops)
1225 return -1;
1226
1227 memset(&msg, 0, sizeof(struct msghdr));
1228 iov_iter_kvec(&msg.msg_iter, READ, iov, iov_count, data);
1229
1230 while (msg_data_left(&msg)) {
1231 rx_loop = sock_recvmsg(conn->sock, &msg, MSG_WAITALL);
1232 if (rx_loop <= 0) {
1233 pr_debug("rx_loop: %d total_rx: %d\n",
1234 rx_loop, total_rx);
1235 return rx_loop;
1236 }
1237 total_rx += rx_loop;
1238 pr_debug("rx_loop: %d, total_rx: %d, data: %d\n",
1239 rx_loop, total_rx, data);
1240 }
1241
1242 return total_rx;
1243}
1244
1245int tx_data(
1246 struct iscsi_conn *conn,
1247 struct kvec *iov,
1248 int iov_count,
1249 int data)
1250{
1251 struct msghdr msg;
1252 int total_tx = 0;
1253
1254 if (!conn || !conn->sock || !conn->conn_ops)
1255 return -1;
1256
1257 if (data <= 0) {
1258 pr_err("Data length is: %d\n", data);
1259 return -1;
1260 }
1261
1262 memset(&msg, 0, sizeof(struct msghdr));
1263
1264 iov_iter_kvec(&msg.msg_iter, WRITE, iov, iov_count, data);
1265
1266 while (msg_data_left(&msg)) {
1267 int tx_loop = sock_sendmsg(conn->sock, &msg);
1268 if (tx_loop <= 0) {
1269 pr_debug("tx_loop: %d total_tx %d\n",
1270 tx_loop, total_tx);
1271 return tx_loop;
1272 }
1273 total_tx += tx_loop;
1274 pr_debug("tx_loop: %d, total_tx: %d, data: %d\n",
1275 tx_loop, total_tx, data);
1276 }
1277
1278 return total_tx;
1279}
1280
1281void iscsit_collect_login_stats(
1282 struct iscsi_conn *conn,
1283 u8 status_class,
1284 u8 status_detail)
1285{
1286 struct iscsi_param *intrname = NULL;
1287 struct iscsi_tiqn *tiqn;
1288 struct iscsi_login_stats *ls;
1289
1290 tiqn = iscsit_snmp_get_tiqn(conn);
1291 if (!tiqn)
1292 return;
1293
1294 ls = &tiqn->login_stats;
1295
1296 spin_lock(&ls->lock);
1297 if (status_class == ISCSI_STATUS_CLS_SUCCESS)
1298 ls->accepts++;
1299 else if (status_class == ISCSI_STATUS_CLS_REDIRECT) {
1300 ls->redirects++;
1301 ls->last_fail_type = ISCSI_LOGIN_FAIL_REDIRECT;
1302 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
1303 (status_detail == ISCSI_LOGIN_STATUS_AUTH_FAILED)) {
1304 ls->authenticate_fails++;
1305 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHENTICATE;
1306 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
1307 (status_detail == ISCSI_LOGIN_STATUS_TGT_FORBIDDEN)) {
1308 ls->authorize_fails++;
1309 ls->last_fail_type = ISCSI_LOGIN_FAIL_AUTHORIZE;
1310 } else if ((status_class == ISCSI_STATUS_CLS_INITIATOR_ERR) &&
1311 (status_detail == ISCSI_LOGIN_STATUS_INIT_ERR)) {
1312 ls->negotiate_fails++;
1313 ls->last_fail_type = ISCSI_LOGIN_FAIL_NEGOTIATE;
1314 } else {
1315 ls->other_fails++;
1316 ls->last_fail_type = ISCSI_LOGIN_FAIL_OTHER;
1317 }
1318
1319
1320 if (status_class != ISCSI_STATUS_CLS_SUCCESS) {
1321 if (conn->param_list)
1322 intrname = iscsi_find_param_from_key(INITIATORNAME,
1323 conn->param_list);
1324 strlcpy(ls->last_intr_fail_name,
1325 (intrname ? intrname->value : "Unknown"),
1326 sizeof(ls->last_intr_fail_name));
1327
1328 ls->last_intr_fail_ip_family = conn->login_family;
1329
1330 ls->last_intr_fail_sockaddr = conn->login_sockaddr;
1331 ls->last_fail_time = get_jiffies_64();
1332 }
1333
1334 spin_unlock(&ls->lock);
1335}
1336
1337struct iscsi_tiqn *iscsit_snmp_get_tiqn(struct iscsi_conn *conn)
1338{
1339 struct iscsi_portal_group *tpg;
1340
1341 if (!conn)
1342 return NULL;
1343
1344 tpg = conn->tpg;
1345 if (!tpg)
1346 return NULL;
1347
1348 if (!tpg->tpg_tiqn)
1349 return NULL;
1350
1351 return tpg->tpg_tiqn;
1352}
1353
1354void iscsit_fill_cxn_timeout_err_stats(struct iscsi_session *sess)
1355{
1356 struct iscsi_portal_group *tpg = sess->tpg;
1357 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
1358
1359 if (!tiqn)
1360 return;
1361
1362 spin_lock_bh(&tiqn->sess_err_stats.lock);
1363 strlcpy(tiqn->sess_err_stats.last_sess_fail_rem_name,
1364 sess->sess_ops->InitiatorName,
1365 sizeof(tiqn->sess_err_stats.last_sess_fail_rem_name));
1366 tiqn->sess_err_stats.last_sess_failure_type =
1367 ISCSI_SESS_ERR_CXN_TIMEOUT;
1368 tiqn->sess_err_stats.cxn_timeout_errors++;
1369 atomic_long_inc(&sess->conn_timeout_errors);
1370 spin_unlock_bh(&tiqn->sess_err_stats.lock);
1371}
1372
