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19#include <linux/string.h>
20#include <linux/kthread.h>
21#include <linux/crypto.h>
22#include <linux/idr.h>
23#include <scsi/iscsi_proto.h>
24#include <target/target_core_base.h>
25#include <target/target_core_fabric.h>
26
27#include <target/iscsi/iscsi_target_core.h>
28#include <target/iscsi/iscsi_target_stat.h>
29#include "iscsi_target_tq.h"
30#include "iscsi_target_device.h"
31#include "iscsi_target_nego.h"
32#include "iscsi_target_erl0.h"
33#include "iscsi_target_erl2.h"
34#include "iscsi_target_login.h"
35#include "iscsi_target_tpg.h"
36#include "iscsi_target_util.h"
37#include "iscsi_target.h"
38#include "iscsi_target_parameters.h"
39
40#include <target/iscsi/iscsi_transport.h>
41
42static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn)
43{
44 struct iscsi_login *login;
45
46 login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
47 if (!login) {
48 pr_err("Unable to allocate memory for struct iscsi_login.\n");
49 return NULL;
50 }
51 conn->login = login;
52 login->conn = conn;
53 login->first_request = 1;
54
55 login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
56 if (!login->req_buf) {
57 pr_err("Unable to allocate memory for response buffer.\n");
58 goto out_login;
59 }
60
61 login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
62 if (!login->rsp_buf) {
63 pr_err("Unable to allocate memory for request buffer.\n");
64 goto out_req_buf;
65 }
66
67 conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
68 if (!conn->conn_ops) {
69 pr_err("Unable to allocate memory for"
70 " struct iscsi_conn_ops.\n");
71 goto out_rsp_buf;
72 }
73
74 init_waitqueue_head(&conn->queues_wq);
75 INIT_LIST_HEAD(&conn->conn_list);
76 INIT_LIST_HEAD(&conn->conn_cmd_list);
77 INIT_LIST_HEAD(&conn->immed_queue_list);
78 INIT_LIST_HEAD(&conn->response_queue_list);
79 init_completion(&conn->conn_post_wait_comp);
80 init_completion(&conn->conn_wait_comp);
81 init_completion(&conn->conn_wait_rcfr_comp);
82 init_completion(&conn->conn_waiting_on_uc_comp);
83 init_completion(&conn->conn_logout_comp);
84 init_completion(&conn->rx_half_close_comp);
85 init_completion(&conn->tx_half_close_comp);
86 spin_lock_init(&conn->cmd_lock);
87 spin_lock_init(&conn->conn_usage_lock);
88 spin_lock_init(&conn->immed_queue_lock);
89 spin_lock_init(&conn->nopin_timer_lock);
90 spin_lock_init(&conn->response_queue_lock);
91 spin_lock_init(&conn->state_lock);
92
93 if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) {
94 pr_err("Unable to allocate conn->conn_cpumask\n");
95 goto out_conn_ops;
96 }
97 conn->conn_login = login;
98
99 return login;
100
101out_conn_ops:
102 kfree(conn->conn_ops);
103out_rsp_buf:
104 kfree(login->rsp_buf);
105out_req_buf:
106 kfree(login->req_buf);
107out_login:
108 kfree(login);
109 return NULL;
110}
111
112
113
114
115
116int iscsi_login_setup_crypto(struct iscsi_conn *conn)
117{
118
119
120
121
122
123 conn->conn_rx_hash.flags = 0;
124 conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
125 CRYPTO_ALG_ASYNC);
126 if (IS_ERR(conn->conn_rx_hash.tfm)) {
127 pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
128 return -ENOMEM;
129 }
130
131 conn->conn_tx_hash.flags = 0;
132 conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
133 CRYPTO_ALG_ASYNC);
134 if (IS_ERR(conn->conn_tx_hash.tfm)) {
135 pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n");
136 crypto_free_hash(conn->conn_rx_hash.tfm);
137 return -ENOMEM;
138 }
139
140 return 0;
141}
142
143static int iscsi_login_check_initiator_version(
144 struct iscsi_conn *conn,
145 u8 version_max,
146 u8 version_min)
147{
148 if ((version_max != 0x00) || (version_min != 0x00)) {
149 pr_err("Unsupported iSCSI IETF Pre-RFC Revision,"
150 " version Min/Max 0x%02x/0x%02x, rejecting login.\n",
151 version_min, version_max);
152 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
153 ISCSI_LOGIN_STATUS_NO_VERSION);
154 return -1;
155 }
156
157 return 0;
158}
159
160int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
161{
162 int sessiontype;
163 struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL;
164 struct iscsi_portal_group *tpg = conn->tpg;
165 struct iscsi_session *sess = NULL, *sess_p = NULL;
166 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
167 struct se_session *se_sess, *se_sess_tmp;
168
169 initiatorname_param = iscsi_find_param_from_key(
170 INITIATORNAME, conn->param_list);
171 sessiontype_param = iscsi_find_param_from_key(
172 SESSIONTYPE, conn->param_list);
173 if (!initiatorname_param || !sessiontype_param) {
174 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
175 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
176 return -1;
177 }
178
179 sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;
180
181 spin_lock_bh(&se_tpg->session_lock);
182 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
183 sess_list) {
184
185 sess_p = se_sess->fabric_sess_ptr;
186 spin_lock(&sess_p->conn_lock);
187 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
188 atomic_read(&sess_p->session_logout) ||
189 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
190 spin_unlock(&sess_p->conn_lock);
191 continue;
192 }
193 if (!memcmp(sess_p->isid, conn->sess->isid, 6) &&
194 (!strcmp(sess_p->sess_ops->InitiatorName,
195 initiatorname_param->value) &&
196 (sess_p->sess_ops->SessionType == sessiontype))) {
197 atomic_set(&sess_p->session_reinstatement, 1);
198 spin_unlock(&sess_p->conn_lock);
199 iscsit_inc_session_usage_count(sess_p);
200 iscsit_stop_time2retain_timer(sess_p);
201 sess = sess_p;
202 break;
203 }
204 spin_unlock(&sess_p->conn_lock);
205 }
206 spin_unlock_bh(&se_tpg->session_lock);
207
208
209
210 if (!sess)
211 return 0;
212
213 pr_debug("%s iSCSI Session SID %u is still active for %s,"
214 " preforming session reinstatement.\n", (sessiontype) ?
215 "Discovery" : "Normal", sess->sid,
216 sess->sess_ops->InitiatorName);
217
218 spin_lock_bh(&sess->conn_lock);
219 if (sess->session_state == TARG_SESS_STATE_FAILED) {
220 spin_unlock_bh(&sess->conn_lock);
221 iscsit_dec_session_usage_count(sess);
222 target_put_session(sess->se_sess);
223 return 0;
224 }
225 spin_unlock_bh(&sess->conn_lock);
226
227 iscsit_stop_session(sess, 1, 1);
228 iscsit_dec_session_usage_count(sess);
229
230 target_put_session(sess->se_sess);
231 return 0;
232}
233
234static void iscsi_login_set_conn_values(
235 struct iscsi_session *sess,
236 struct iscsi_conn *conn,
237 __be16 cid)
238{
239 conn->sess = sess;
240 conn->cid = be16_to_cpu(cid);
241
242
243
244
245 get_random_bytes(&conn->stat_sn, sizeof(u32));
246
247 mutex_lock(&auth_id_lock);
248 conn->auth_id = iscsit_global->auth_id++;
249 mutex_unlock(&auth_id_lock);
250}
251
252static __printf(2, 3) int iscsi_change_param_sprintf(
253 struct iscsi_conn *conn,
254 const char *fmt, ...)
255{
256 va_list args;
257 unsigned char buf[64];
258
259 memset(buf, 0, sizeof buf);
260
261 va_start(args, fmt);
262 vsnprintf(buf, sizeof buf, fmt, args);
263 va_end(args);
264
265 if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
266 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
267 ISCSI_LOGIN_STATUS_NO_RESOURCES);
268 return -1;
269 }
270
271 return 0;
272}
273
274
275
276
277
278static int iscsi_login_zero_tsih_s1(
279 struct iscsi_conn *conn,
280 unsigned char *buf)
281{
282 struct iscsi_session *sess = NULL;
283 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
284 int ret;
285
286 sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
287 if (!sess) {
288 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
289 ISCSI_LOGIN_STATUS_NO_RESOURCES);
290 pr_err("Could not allocate memory for session\n");
291 return -ENOMEM;
292 }
293
294 iscsi_login_set_conn_values(sess, conn, pdu->cid);
295 sess->init_task_tag = pdu->itt;
296 memcpy(&sess->isid, pdu->isid, 6);
297 sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn);
298 INIT_LIST_HEAD(&sess->sess_conn_list);
299 INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list);
300 INIT_LIST_HEAD(&sess->cr_active_list);
301 INIT_LIST_HEAD(&sess->cr_inactive_list);
302 init_completion(&sess->async_msg_comp);
303 init_completion(&sess->reinstatement_comp);
304 init_completion(&sess->session_wait_comp);
305 init_completion(&sess->session_waiting_on_uc_comp);
306 mutex_init(&sess->cmdsn_mutex);
307 spin_lock_init(&sess->conn_lock);
308 spin_lock_init(&sess->cr_a_lock);
309 spin_lock_init(&sess->cr_i_lock);
310 spin_lock_init(&sess->session_usage_lock);
311 spin_lock_init(&sess->ttt_lock);
312
313 idr_preload(GFP_KERNEL);
314 spin_lock_bh(&sess_idr_lock);
315 ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
316 if (ret >= 0)
317 sess->session_index = ret;
318 spin_unlock_bh(&sess_idr_lock);
319 idr_preload_end();
320
321 if (ret < 0) {
322 pr_err("idr_alloc() for sess_idr failed\n");
323 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
324 ISCSI_LOGIN_STATUS_NO_RESOURCES);
325 kfree(sess);
326 return -ENOMEM;
327 }
328
329 sess->creation_time = get_jiffies_64();
330
331
332
333
334 sess->max_cmd_sn = be32_to_cpu(pdu->cmdsn);
335
336 sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL);
337 if (!sess->sess_ops) {
338 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
339 ISCSI_LOGIN_STATUS_NO_RESOURCES);
340 pr_err("Unable to allocate memory for"
341 " struct iscsi_sess_ops.\n");
342 kfree(sess);
343 return -ENOMEM;
344 }
345
346 sess->se_sess = transport_init_session(TARGET_PROT_NORMAL);
347 if (IS_ERR(sess->se_sess)) {
348 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
349 ISCSI_LOGIN_STATUS_NO_RESOURCES);
350 kfree(sess);
351 return -ENOMEM;
352 }
353
354 return 0;
355}
356
357static int iscsi_login_zero_tsih_s2(
358 struct iscsi_conn *conn)
359{
360 struct iscsi_node_attrib *na;
361 struct iscsi_session *sess = conn->sess;
362 bool iser = false;
363
364 sess->tpg = conn->tpg;
365
366
367
368
369
370 sess->tsih = ++sess->tpg->ntsih;
371 if (!sess->tsih)
372 sess->tsih = ++sess->tpg->ntsih;
373
374
375
376
377 if (iscsi_copy_param_list(&conn->param_list,
378 conn->tpg->param_list, 1) < 0) {
379 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
380 ISCSI_LOGIN_STATUS_NO_RESOURCES);
381 return -1;
382 }
383
384 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
385 iser = true;
386
387 iscsi_set_keys_to_negotiate(conn->param_list, iser);
388
389 if (sess->sess_ops->SessionType)
390 return iscsi_set_keys_irrelevant_for_discovery(
391 conn->param_list);
392
393 na = iscsit_tpg_get_node_attrib(sess);
394
395
396
397
398
399
400
401
402 if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt))
403 return -1;
404
405
406
407
408
409
410 if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl))
411 return -1;
412
413 if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0)
414 return -1;
415
416
417
418 if (iser) {
419 struct iscsi_param *param;
420 unsigned long mrdsl, off;
421 int rc;
422
423 if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes"))
424 return -1;
425
426
427
428
429
430 param = iscsi_find_param_from_key("MaxRecvDataSegmentLength",
431 conn->param_list);
432 if (!param) {
433 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
434 ISCSI_LOGIN_STATUS_NO_RESOURCES);
435 return -1;
436 }
437 rc = kstrtoul(param->value, 0, &mrdsl);
438 if (rc < 0) {
439 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
440 ISCSI_LOGIN_STATUS_NO_RESOURCES);
441 return -1;
442 }
443 off = mrdsl % PAGE_SIZE;
444 if (!off)
445 goto check_prot;
446
447 if (mrdsl < PAGE_SIZE)
448 mrdsl = PAGE_SIZE;
449 else
450 mrdsl -= off;
451
452 pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down"
453 " to PAGE_SIZE\n", mrdsl);
454
455 if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl))
456 return -1;
457
458
459
460
461check_prot:
462 if (sess->se_sess->sup_prot_ops &
463 (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS |
464 TARGET_PROT_DOUT_INSERT)) {
465
466 if (iscsi_change_param_sprintf(conn, "ImmediateData=No"))
467 return -1;
468
469 if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes"))
470 return -1;
471
472 pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for"
473 " T10-PI enabled ISER session\n");
474 }
475 }
476
477 return 0;
478}
479
480
481
482
483
484int iscsi_login_disable_FIM_keys(
485 struct iscsi_param_list *param_list,
486 struct iscsi_conn *conn)
487{
488 struct iscsi_param *param;
489
490 param = iscsi_find_param_from_key("OFMarker", param_list);
491 if (!param) {
492 pr_err("iscsi_find_param_from_key() for"
493 " OFMarker failed\n");
494 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
495 ISCSI_LOGIN_STATUS_NO_RESOURCES);
496 return -1;
497 }
498 param->state &= ~PSTATE_NEGOTIATE;
499
500 param = iscsi_find_param_from_key("OFMarkInt", param_list);
501 if (!param) {
502 pr_err("iscsi_find_param_from_key() for"
503 " IFMarker failed\n");
504 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
505 ISCSI_LOGIN_STATUS_NO_RESOURCES);
506 return -1;
507 }
508 param->state &= ~PSTATE_NEGOTIATE;
509
510 param = iscsi_find_param_from_key("IFMarker", param_list);
511 if (!param) {
512 pr_err("iscsi_find_param_from_key() for"
513 " IFMarker failed\n");
514 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
515 ISCSI_LOGIN_STATUS_NO_RESOURCES);
516 return -1;
517 }
518 param->state &= ~PSTATE_NEGOTIATE;
519
520 param = iscsi_find_param_from_key("IFMarkInt", param_list);
521 if (!param) {
522 pr_err("iscsi_find_param_from_key() for"
523 " IFMarker failed\n");
524 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
525 ISCSI_LOGIN_STATUS_NO_RESOURCES);
526 return -1;
527 }
528 param->state &= ~PSTATE_NEGOTIATE;
529
530 return 0;
531}
532
533static int iscsi_login_non_zero_tsih_s1(
534 struct iscsi_conn *conn,
535 unsigned char *buf)
536{
537 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
538
539 iscsi_login_set_conn_values(NULL, conn, pdu->cid);
540 return 0;
541}
542
543
544
545
546static int iscsi_login_non_zero_tsih_s2(
547 struct iscsi_conn *conn,
548 unsigned char *buf)
549{
550 struct iscsi_portal_group *tpg = conn->tpg;
551 struct iscsi_session *sess = NULL, *sess_p = NULL;
552 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
553 struct se_session *se_sess, *se_sess_tmp;
554 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
555 bool iser = false;
556
557 spin_lock_bh(&se_tpg->session_lock);
558 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
559 sess_list) {
560
561 sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr;
562 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
563 atomic_read(&sess_p->session_logout) ||
564 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED))
565 continue;
566 if (!memcmp(sess_p->isid, pdu->isid, 6) &&
567 (sess_p->tsih == be16_to_cpu(pdu->tsih))) {
568 iscsit_inc_session_usage_count(sess_p);
569 iscsit_stop_time2retain_timer(sess_p);
570 sess = sess_p;
571 break;
572 }
573 }
574 spin_unlock_bh(&se_tpg->session_lock);
575
576
577
578
579 if (!sess) {
580 pr_err("Initiator attempting to add a connection to"
581 " a non-existent session, rejecting iSCSI Login.\n");
582 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
583 ISCSI_LOGIN_STATUS_NO_SESSION);
584 return -1;
585 }
586
587
588
589
590
591 spin_lock_bh(&sess->conn_lock);
592 if (sess->session_state == TARG_SESS_STATE_FAILED)
593 atomic_set(&sess->session_continuation, 1);
594 spin_unlock_bh(&sess->conn_lock);
595
596 iscsi_login_set_conn_values(sess, conn, pdu->cid);
597
598 if (iscsi_copy_param_list(&conn->param_list,
599 conn->tpg->param_list, 0) < 0) {
600 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
601 ISCSI_LOGIN_STATUS_NO_RESOURCES);
602 return -1;
603 }
604
605 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
606 iser = true;
607
608 iscsi_set_keys_to_negotiate(conn->param_list, iser);
609
610
611
612
613
614
615
616 if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt))
617 return -1;
618
619 return iscsi_login_disable_FIM_keys(conn->param_list, conn);
620}
621
622int iscsi_login_post_auth_non_zero_tsih(
623 struct iscsi_conn *conn,
624 u16 cid,
625 u32 exp_statsn)
626{
627 struct iscsi_conn *conn_ptr = NULL;
628 struct iscsi_conn_recovery *cr = NULL;
629 struct iscsi_session *sess = conn->sess;
630
631
632
633
634
635
636
637
638 conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid);
639 if (conn_ptr) {
640 pr_err("Connection exists with CID %hu for %s,"
641 " performing connection reinstatement.\n",
642 conn_ptr->cid, sess->sess_ops->InitiatorName);
643
644 iscsit_connection_reinstatement_rcfr(conn_ptr);
645 iscsit_dec_conn_usage_count(conn_ptr);
646 }
647
648
649
650
651
652
653
654
655
656
657 if (sess->sess_ops->ErrorRecoveryLevel == 2) {
658 cr = iscsit_get_inactive_connection_recovery_entry(
659 sess, cid);
660 if (cr) {
661 pr_debug("Performing implicit logout"
662 " for connection recovery on CID: %hu\n",
663 conn->cid);
664 iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn);
665 }
666 }
667
668
669
670
671
672
673
674 pr_debug("Adding CID %hu to existing session for %s.\n",
675 cid, sess->sess_ops->InitiatorName);
676
677 if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) {
678 pr_err("Adding additional connection to this session"
679 " would exceed MaxConnections %d, login failed.\n",
680 sess->sess_ops->MaxConnections);
681 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
682 ISCSI_LOGIN_STATUS_ISID_ERROR);
683 return -1;
684 }
685
686 return 0;
687}
688
689static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
690{
691 struct iscsi_session *sess = conn->sess;
692
693
694
695 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
696 return;
697
698 if (!sess->sess_ops->SessionType)
699 iscsit_start_nopin_timer(conn);
700}
701
702int iscsi_post_login_handler(
703 struct iscsi_np *np,
704 struct iscsi_conn *conn,
705 u8 zero_tsih)
706{
707 int stop_timer = 0;
708 struct iscsi_session *sess = conn->sess;
709 struct se_session *se_sess = sess->se_sess;
710 struct iscsi_portal_group *tpg = sess->tpg;
711 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
712 struct iscsi_thread_set *ts;
713
714 iscsit_inc_conn_usage_count(conn);
715
716 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS,
717 ISCSI_LOGIN_STATUS_ACCEPT);
718
719 pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n");
720 conn->conn_state = TARG_CONN_STATE_LOGGED_IN;
721
722 iscsi_set_connection_parameters(conn->conn_ops, conn->param_list);
723 iscsit_set_sync_and_steering_values(conn);
724
725
726
727 ts = iscsi_get_thread_set();
728 if (!zero_tsih) {
729 iscsi_set_session_parameters(sess->sess_ops,
730 conn->param_list, 0);
731 iscsi_release_param_list(conn->param_list);
732 conn->param_list = NULL;
733
734 spin_lock_bh(&sess->conn_lock);
735 atomic_set(&sess->session_continuation, 0);
736 if (sess->session_state == TARG_SESS_STATE_FAILED) {
737 pr_debug("Moving to"
738 " TARG_SESS_STATE_LOGGED_IN.\n");
739 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
740 stop_timer = 1;
741 }
742
743 pr_debug("iSCSI Login successful on CID: %hu from %s to"
744 " %s:%hu,%hu\n", conn->cid, conn->login_ip,
745 conn->local_ip, conn->local_port, tpg->tpgt);
746
747 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
748 atomic_inc(&sess->nconn);
749 pr_debug("Incremented iSCSI Connection count to %hu"
750 " from node: %s\n", atomic_read(&sess->nconn),
751 sess->sess_ops->InitiatorName);
752 spin_unlock_bh(&sess->conn_lock);
753
754 iscsi_post_login_start_timers(conn);
755
756 iscsi_activate_thread_set(conn, ts);
757
758
759
760
761 iscsit_thread_get_cpumask(conn);
762 conn->conn_rx_reset_cpumask = 1;
763 conn->conn_tx_reset_cpumask = 1;
764
765 iscsit_dec_conn_usage_count(conn);
766 if (stop_timer) {
767 spin_lock_bh(&se_tpg->session_lock);
768 iscsit_stop_time2retain_timer(sess);
769 spin_unlock_bh(&se_tpg->session_lock);
770 }
771 iscsit_dec_session_usage_count(sess);
772 return 0;
773 }
774
775 iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1);
776 iscsi_release_param_list(conn->param_list);
777 conn->param_list = NULL;
778
779 iscsit_determine_maxcmdsn(sess);
780
781 spin_lock_bh(&se_tpg->session_lock);
782 __transport_register_session(&sess->tpg->tpg_se_tpg,
783 se_sess->se_node_acl, se_sess, sess);
784 pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n");
785 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
786
787 pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n",
788 conn->cid, conn->login_ip, conn->local_ip, conn->local_port,
789 tpg->tpgt);
790
791 spin_lock_bh(&sess->conn_lock);
792 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
793 atomic_inc(&sess->nconn);
794 pr_debug("Incremented iSCSI Connection count to %hu from node:"
795 " %s\n", atomic_read(&sess->nconn),
796 sess->sess_ops->InitiatorName);
797 spin_unlock_bh(&sess->conn_lock);
798
799 sess->sid = tpg->sid++;
800 if (!sess->sid)
801 sess->sid = tpg->sid++;
802 pr_debug("Established iSCSI session from node: %s\n",
803 sess->sess_ops->InitiatorName);
804
805 tpg->nsessions++;
806 if (tpg->tpg_tiqn)
807 tpg->tpg_tiqn->tiqn_nsessions++;
808
809 pr_debug("Incremented number of active iSCSI sessions to %u on"
810 " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt);
811 spin_unlock_bh(&se_tpg->session_lock);
812
813 iscsi_post_login_start_timers(conn);
814 iscsi_activate_thread_set(conn, ts);
815
816
817
818
819 iscsit_thread_get_cpumask(conn);
820 conn->conn_rx_reset_cpumask = 1;
821 conn->conn_tx_reset_cpumask = 1;
822
823 iscsit_dec_conn_usage_count(conn);
824
825 return 0;
826}
827
828static void iscsi_handle_login_thread_timeout(unsigned long data)
829{
830 struct iscsi_np *np = (struct iscsi_np *) data;
831
832 spin_lock_bh(&np->np_thread_lock);
833 pr_err("iSCSI Login timeout on Network Portal %s:%hu\n",
834 np->np_ip, np->np_port);
835
836 if (np->np_login_timer_flags & ISCSI_TF_STOP) {
837 spin_unlock_bh(&np->np_thread_lock);
838 return;
839 }
840
841 if (np->np_thread)
842 send_sig(SIGINT, np->np_thread, 1);
843
844 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
845 spin_unlock_bh(&np->np_thread_lock);
846}
847
848static void iscsi_start_login_thread_timer(struct iscsi_np *np)
849{
850
851
852
853
854 spin_lock_bh(&np->np_thread_lock);
855 init_timer(&np->np_login_timer);
856 np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
857 np->np_login_timer.data = (unsigned long)np;
858 np->np_login_timer.function = iscsi_handle_login_thread_timeout;
859 np->np_login_timer_flags &= ~ISCSI_TF_STOP;
860 np->np_login_timer_flags |= ISCSI_TF_RUNNING;
861 add_timer(&np->np_login_timer);
862
863 pr_debug("Added timeout timer to iSCSI login request for"
864 " %u seconds.\n", TA_LOGIN_TIMEOUT);
865 spin_unlock_bh(&np->np_thread_lock);
866}
867
868static void iscsi_stop_login_thread_timer(struct iscsi_np *np)
869{
870 spin_lock_bh(&np->np_thread_lock);
871 if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) {
872 spin_unlock_bh(&np->np_thread_lock);
873 return;
874 }
875 np->np_login_timer_flags |= ISCSI_TF_STOP;
876 spin_unlock_bh(&np->np_thread_lock);
877
878 del_timer_sync(&np->np_login_timer);
879
880 spin_lock_bh(&np->np_thread_lock);
881 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
882 spin_unlock_bh(&np->np_thread_lock);
883}
884
885int iscsit_setup_np(
886 struct iscsi_np *np,
887 struct __kernel_sockaddr_storage *sockaddr)
888{
889 struct socket *sock = NULL;
890 int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len;
891
892 switch (np->np_network_transport) {
893 case ISCSI_TCP:
894 np->np_ip_proto = IPPROTO_TCP;
895 np->np_sock_type = SOCK_STREAM;
896 break;
897 case ISCSI_SCTP_TCP:
898 np->np_ip_proto = IPPROTO_SCTP;
899 np->np_sock_type = SOCK_STREAM;
900 break;
901 case ISCSI_SCTP_UDP:
902 np->np_ip_proto = IPPROTO_SCTP;
903 np->np_sock_type = SOCK_SEQPACKET;
904 break;
905 default:
906 pr_err("Unsupported network_transport: %d\n",
907 np->np_network_transport);
908 return -EINVAL;
909 }
910
911 np->np_ip_proto = IPPROTO_TCP;
912 np->np_sock_type = SOCK_STREAM;
913
914 ret = sock_create(sockaddr->ss_family, np->np_sock_type,
915 np->np_ip_proto, &sock);
916 if (ret < 0) {
917 pr_err("sock_create() failed.\n");
918 return ret;
919 }
920 np->np_socket = sock;
921
922
923
924
925 memcpy(&np->np_sockaddr, sockaddr,
926 sizeof(struct __kernel_sockaddr_storage));
927
928 if (sockaddr->ss_family == AF_INET6)
929 len = sizeof(struct sockaddr_in6);
930 else
931 len = sizeof(struct sockaddr_in);
932
933
934
935
936 opt = 1;
937 if (np->np_network_transport == ISCSI_TCP) {
938 ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
939 (char *)&opt, sizeof(opt));
940 if (ret < 0) {
941 pr_err("kernel_setsockopt() for TCP_NODELAY"
942 " failed: %d\n", ret);
943 goto fail;
944 }
945 }
946
947
948 ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
949 (char *)&opt, sizeof(opt));
950 if (ret < 0) {
951 pr_err("kernel_setsockopt() for SO_REUSEADDR"
952 " failed\n");
953 goto fail;
954 }
955
956 ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND,
957 (char *)&opt, sizeof(opt));
958 if (ret < 0) {
959 pr_err("kernel_setsockopt() for IP_FREEBIND"
960 " failed\n");
961 goto fail;
962 }
963
964 ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len);
965 if (ret < 0) {
966 pr_err("kernel_bind() failed: %d\n", ret);
967 goto fail;
968 }
969
970 ret = kernel_listen(sock, backlog);
971 if (ret != 0) {
972 pr_err("kernel_listen() failed: %d\n", ret);
973 goto fail;
974 }
975
976 return 0;
977fail:
978 np->np_socket = NULL;
979 sock_release(sock);
980 return ret;
981}
982
983int iscsi_target_setup_login_socket(
984 struct iscsi_np *np,
985 struct __kernel_sockaddr_storage *sockaddr)
986{
987 struct iscsit_transport *t;
988 int rc;
989
990 t = iscsit_get_transport(np->np_network_transport);
991 if (!t)
992 return -EINVAL;
993
994 rc = t->iscsit_setup_np(np, sockaddr);
995 if (rc < 0) {
996 iscsit_put_transport(t);
997 return rc;
998 }
999
1000 np->np_transport = t;
1001 np->enabled = true;
1002 return 0;
1003}
1004
1005int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn)
1006{
1007 struct socket *new_sock, *sock = np->np_socket;
1008 struct sockaddr_in sock_in;
1009 struct sockaddr_in6 sock_in6;
1010 int rc, err;
1011
1012 rc = kernel_accept(sock, &new_sock, 0);
1013 if (rc < 0)
1014 return rc;
1015
1016 conn->sock = new_sock;
1017 conn->login_family = np->np_sockaddr.ss_family;
1018
1019 if (np->np_sockaddr.ss_family == AF_INET6) {
1020 memset(&sock_in6, 0, sizeof(struct sockaddr_in6));
1021
1022 rc = conn->sock->ops->getname(conn->sock,
1023 (struct sockaddr *)&sock_in6, &err, 1);
1024 if (!rc) {
1025 if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr))
1026 snprintf(conn->login_ip, sizeof(conn->login_ip), "[%pI6c]",
1027 &sock_in6.sin6_addr.in6_u);
1028 else
1029 snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI4",
1030 &sock_in6.sin6_addr.s6_addr32[3]);
1031 conn->login_port = ntohs(sock_in6.sin6_port);
1032 }
1033
1034 rc = conn->sock->ops->getname(conn->sock,
1035 (struct sockaddr *)&sock_in6, &err, 0);
1036 if (!rc) {
1037 if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr))
1038 snprintf(conn->local_ip, sizeof(conn->local_ip), "[%pI6c]",
1039 &sock_in6.sin6_addr.in6_u);
1040 else
1041 snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI4",
1042 &sock_in6.sin6_addr.s6_addr32[3]);
1043 conn->local_port = ntohs(sock_in6.sin6_port);
1044 }
1045 } else {
1046 memset(&sock_in, 0, sizeof(struct sockaddr_in));
1047
1048 rc = conn->sock->ops->getname(conn->sock,
1049 (struct sockaddr *)&sock_in, &err, 1);
1050 if (!rc) {
1051 sprintf(conn->login_ip, "%pI4",
1052 &sock_in.sin_addr.s_addr);
1053 conn->login_port = ntohs(sock_in.sin_port);
1054 }
1055
1056 rc = conn->sock->ops->getname(conn->sock,
1057 (struct sockaddr *)&sock_in, &err, 0);
1058 if (!rc) {
1059 sprintf(conn->local_ip, "%pI4",
1060 &sock_in.sin_addr.s_addr);
1061 conn->local_port = ntohs(sock_in.sin_port);
1062 }
1063 }
1064
1065 return 0;
1066}
1067
1068int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
1069{
1070 struct iscsi_login_req *login_req;
1071 u32 padding = 0, payload_length;
1072
1073 if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0)
1074 return -1;
1075
1076 login_req = (struct iscsi_login_req *)login->req;
1077 payload_length = ntoh24(login_req->dlength);
1078 padding = ((-payload_length) & 3);
1079
1080 pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
1081 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n",
1082 login_req->flags, login_req->itt, login_req->cmdsn,
1083 login_req->exp_statsn, login_req->cid, payload_length);
1084
1085
1086
1087
1088 if (login->first_request) {
1089 login_req = (struct iscsi_login_req *)login->req;
1090 login->leading_connection = (!login_req->tsih) ? 1 : 0;
1091 login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags);
1092 login->version_min = login_req->min_version;
1093 login->version_max = login_req->max_version;
1094 memcpy(login->isid, login_req->isid, 6);
1095 login->cmd_sn = be32_to_cpu(login_req->cmdsn);
1096 login->init_task_tag = login_req->itt;
1097 login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn);
1098 login->cid = be16_to_cpu(login_req->cid);
1099 login->tsih = be16_to_cpu(login_req->tsih);
1100 }
1101
1102 if (iscsi_target_check_login_request(conn, login) < 0)
1103 return -1;
1104
1105 memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS);
1106 if (iscsi_login_rx_data(conn, login->req_buf,
1107 payload_length + padding) < 0)
1108 return -1;
1109
1110 return 0;
1111}
1112
1113int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
1114 u32 length)
1115{
1116 if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0)
1117 return -1;
1118
1119 return 0;
1120}
1121
1122static int
1123iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t)
1124{
1125 int rc;
1126
1127 if (!t->owner) {
1128 conn->conn_transport = t;
1129 return 0;
1130 }
1131
1132 rc = try_module_get(t->owner);
1133 if (!rc) {
1134 pr_err("try_module_get() failed for %s\n", t->name);
1135 return -EINVAL;
1136 }
1137
1138 conn->conn_transport = t;
1139 return 0;
1140}
1141
1142void iscsi_target_login_sess_out(struct iscsi_conn *conn,
1143 struct iscsi_np *np, bool zero_tsih, bool new_sess)
1144{
1145 if (!new_sess)
1146 goto old_sess_out;
1147
1148 pr_err("iSCSI Login negotiation failed.\n");
1149 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1150 ISCSI_LOGIN_STATUS_INIT_ERR);
1151 if (!zero_tsih || !conn->sess)
1152 goto old_sess_out;
1153 if (conn->sess->se_sess)
1154 transport_free_session(conn->sess->se_sess);
1155 if (conn->sess->session_index != 0) {
1156 spin_lock_bh(&sess_idr_lock);
1157 idr_remove(&sess_idr, conn->sess->session_index);
1158 spin_unlock_bh(&sess_idr_lock);
1159 }
1160 kfree(conn->sess->sess_ops);
1161 kfree(conn->sess);
1162 conn->sess = NULL;
1163
1164old_sess_out:
1165 iscsi_stop_login_thread_timer(np);
1166
1167
1168
1169
1170 if (!zero_tsih && conn->sess) {
1171 spin_lock_bh(&conn->sess->conn_lock);
1172 if (conn->sess->session_state == TARG_SESS_STATE_FAILED) {
1173 struct se_portal_group *se_tpg =
1174 &conn->tpg->tpg_se_tpg;
1175
1176 atomic_set(&conn->sess->session_continuation, 0);
1177 spin_unlock_bh(&conn->sess->conn_lock);
1178 spin_lock_bh(&se_tpg->session_lock);
1179 iscsit_start_time2retain_handler(conn->sess);
1180 spin_unlock_bh(&se_tpg->session_lock);
1181 } else
1182 spin_unlock_bh(&conn->sess->conn_lock);
1183 iscsit_dec_session_usage_count(conn->sess);
1184 }
1185
1186 if (!IS_ERR(conn->conn_rx_hash.tfm))
1187 crypto_free_hash(conn->conn_rx_hash.tfm);
1188 if (!IS_ERR(conn->conn_tx_hash.tfm))
1189 crypto_free_hash(conn->conn_tx_hash.tfm);
1190
1191 free_cpumask_var(conn->conn_cpumask);
1192
1193 kfree(conn->conn_ops);
1194
1195 if (conn->param_list) {
1196 iscsi_release_param_list(conn->param_list);
1197 conn->param_list = NULL;
1198 }
1199 iscsi_target_nego_release(conn);
1200
1201 if (conn->sock) {
1202 sock_release(conn->sock);
1203 conn->sock = NULL;
1204 }
1205
1206 if (conn->conn_transport->iscsit_wait_conn)
1207 conn->conn_transport->iscsit_wait_conn(conn);
1208
1209 if (conn->conn_transport->iscsit_free_conn)
1210 conn->conn_transport->iscsit_free_conn(conn);
1211
1212 iscsit_put_transport(conn->conn_transport);
1213 kfree(conn);
1214}
1215
1216static int __iscsi_target_login_thread(struct iscsi_np *np)
1217{
1218 u8 *buffer, zero_tsih = 0;
1219 int ret = 0, rc;
1220 struct iscsi_conn *conn = NULL;
1221 struct iscsi_login *login;
1222 struct iscsi_portal_group *tpg = NULL;
1223 struct iscsi_login_req *pdu;
1224 struct iscsi_tpg_np *tpg_np;
1225 bool new_sess = false;
1226
1227 flush_signals(current);
1228
1229 spin_lock_bh(&np->np_thread_lock);
1230 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
1231 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
1232 complete(&np->np_restart_comp);
1233 } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) {
1234 spin_unlock_bh(&np->np_thread_lock);
1235 goto exit;
1236 } else {
1237 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
1238 }
1239 spin_unlock_bh(&np->np_thread_lock);
1240
1241 conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
1242 if (!conn) {
1243 pr_err("Could not allocate memory for"
1244 " new connection\n");
1245
1246 return 1;
1247 }
1248 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
1249 conn->conn_state = TARG_CONN_STATE_FREE;
1250
1251 if (iscsit_conn_set_transport(conn, np->np_transport) < 0) {
1252 kfree(conn);
1253 return 1;
1254 }
1255
1256 rc = np->np_transport->iscsit_accept_np(np, conn);
1257 if (rc == -ENOSYS) {
1258 complete(&np->np_restart_comp);
1259 iscsit_put_transport(conn->conn_transport);
1260 kfree(conn);
1261 conn = NULL;
1262 goto exit;
1263 } else if (rc < 0) {
1264 spin_lock_bh(&np->np_thread_lock);
1265 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
1266 spin_unlock_bh(&np->np_thread_lock);
1267 complete(&np->np_restart_comp);
1268 iscsit_put_transport(conn->conn_transport);
1269 kfree(conn);
1270 conn = NULL;
1271
1272 return 1;
1273 }
1274 spin_unlock_bh(&np->np_thread_lock);
1275 iscsit_put_transport(conn->conn_transport);
1276 kfree(conn);
1277 conn = NULL;
1278 goto out;
1279 }
1280
1281
1282
1283 login = iscsi_login_init_conn(conn);
1284 if (!login) {
1285 goto new_sess_out;
1286 }
1287
1288 iscsi_start_login_thread_timer(np);
1289
1290 pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
1291 conn->conn_state = TARG_CONN_STATE_XPT_UP;
1292
1293
1294
1295 rc = np->np_transport->iscsit_get_login_rx(conn, login);
1296 if (rc == 1)
1297 return 1;
1298 else if (rc < 0)
1299 goto new_sess_out;
1300
1301 buffer = &login->req[0];
1302 pdu = (struct iscsi_login_req *)buffer;
1303
1304
1305
1306
1307 conn->login_itt = pdu->itt;
1308
1309 spin_lock_bh(&np->np_thread_lock);
1310 if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
1311 spin_unlock_bh(&np->np_thread_lock);
1312 pr_err("iSCSI Network Portal on %s:%hu currently not"
1313 " active.\n", np->np_ip, np->np_port);
1314 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1315 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1316 goto new_sess_out;
1317 }
1318 spin_unlock_bh(&np->np_thread_lock);
1319
1320 conn->network_transport = np->np_network_transport;
1321
1322 pr_debug("Received iSCSI login request from %s on %s Network"
1323 " Portal %s:%hu\n", conn->login_ip, np->np_transport->name,
1324 conn->local_ip, conn->local_port);
1325
1326 pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
1327 conn->conn_state = TARG_CONN_STATE_IN_LOGIN;
1328
1329 if (iscsi_login_check_initiator_version(conn, pdu->max_version,
1330 pdu->min_version) < 0)
1331 goto new_sess_out;
1332
1333 zero_tsih = (pdu->tsih == 0x0000);
1334 if (zero_tsih) {
1335
1336
1337
1338
1339
1340 if (iscsi_login_zero_tsih_s1(conn, buffer) < 0)
1341 goto new_sess_out;
1342 } else {
1343
1344
1345
1346
1347
1348
1349
1350 if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0)
1351 goto new_sess_out;
1352 }
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362 rc = iscsi_target_locate_portal(np, conn, login);
1363 if (rc < 0) {
1364 tpg = conn->tpg;
1365 goto new_sess_out;
1366 }
1367 login->zero_tsih = zero_tsih;
1368
1369 conn->sess->se_sess->sup_prot_ops =
1370 conn->conn_transport->iscsit_get_sup_prot_ops(conn);
1371
1372 tpg = conn->tpg;
1373 if (!tpg) {
1374 pr_err("Unable to locate struct iscsi_conn->tpg\n");
1375 goto new_sess_out;
1376 }
1377
1378 if (zero_tsih) {
1379 if (iscsi_login_zero_tsih_s2(conn) < 0)
1380 goto new_sess_out;
1381 } else {
1382 if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0)
1383 goto old_sess_out;
1384 }
1385
1386 ret = iscsi_target_start_negotiation(login, conn);
1387 if (ret < 0)
1388 goto new_sess_out;
1389
1390 if (!conn->sess) {
1391 pr_err("struct iscsi_conn session pointer is NULL!\n");
1392 goto new_sess_out;
1393 }
1394
1395 iscsi_stop_login_thread_timer(np);
1396
1397 if (signal_pending(current))
1398 goto new_sess_out;
1399
1400 if (ret == 1) {
1401 tpg_np = conn->tpg_np;
1402
1403 ret = iscsi_post_login_handler(np, conn, zero_tsih);
1404 if (ret < 0)
1405 goto new_sess_out;
1406
1407 iscsit_deaccess_np(np, tpg, tpg_np);
1408 }
1409
1410 tpg = NULL;
1411 tpg_np = NULL;
1412
1413 return 1;
1414
1415new_sess_out:
1416 new_sess = true;
1417old_sess_out:
1418 tpg_np = conn->tpg_np;
1419 iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess);
1420 new_sess = false;
1421
1422 if (tpg) {
1423 iscsit_deaccess_np(np, tpg, tpg_np);
1424 tpg = NULL;
1425 tpg_np = NULL;
1426 }
1427
1428out:
1429 return 1;
1430
1431exit:
1432 iscsi_stop_login_thread_timer(np);
1433 spin_lock_bh(&np->np_thread_lock);
1434 np->np_thread_state = ISCSI_NP_THREAD_EXIT;
1435 spin_unlock_bh(&np->np_thread_lock);
1436
1437 return 0;
1438}
1439
1440int iscsi_target_login_thread(void *arg)
1441{
1442 struct iscsi_np *np = arg;
1443 int ret;
1444
1445 allow_signal(SIGINT);
1446
1447 while (1) {
1448 ret = __iscsi_target_login_thread(np);
1449
1450
1451
1452
1453 if (ret != 1)
1454 break;
1455 }
1456
1457 return 0;
1458}
1459
