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19#include <crypto/hash.h>
20#include <linux/string.h>
21#include <linux/kthread.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 init_completion(&conn->rx_login_comp);
87 spin_lock_init(&conn->cmd_lock);
88 spin_lock_init(&conn->conn_usage_lock);
89 spin_lock_init(&conn->immed_queue_lock);
90 spin_lock_init(&conn->nopin_timer_lock);
91 spin_lock_init(&conn->response_queue_lock);
92 spin_lock_init(&conn->state_lock);
93
94 if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) {
95 pr_err("Unable to allocate conn->conn_cpumask\n");
96 goto out_conn_ops;
97 }
98 conn->conn_login = login;
99
100 return login;
101
102out_conn_ops:
103 kfree(conn->conn_ops);
104out_rsp_buf:
105 kfree(login->rsp_buf);
106out_req_buf:
107 kfree(login->req_buf);
108out_login:
109 kfree(login);
110 return NULL;
111}
112
113
114
115
116
117int iscsi_login_setup_crypto(struct iscsi_conn *conn)
118{
119 struct crypto_ahash *tfm;
120
121
122
123
124
125
126 tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC);
127 if (IS_ERR(tfm)) {
128 pr_err("crypto_alloc_ahash() failed\n");
129 return -ENOMEM;
130 }
131
132 conn->conn_rx_hash = ahash_request_alloc(tfm, GFP_KERNEL);
133 if (!conn->conn_rx_hash) {
134 pr_err("ahash_request_alloc() failed for conn_rx_hash\n");
135 crypto_free_ahash(tfm);
136 return -ENOMEM;
137 }
138 ahash_request_set_callback(conn->conn_rx_hash, 0, NULL, NULL);
139
140 conn->conn_tx_hash = ahash_request_alloc(tfm, GFP_KERNEL);
141 if (!conn->conn_tx_hash) {
142 pr_err("ahash_request_alloc() failed for conn_tx_hash\n");
143 ahash_request_free(conn->conn_rx_hash);
144 conn->conn_rx_hash = NULL;
145 crypto_free_ahash(tfm);
146 return -ENOMEM;
147 }
148 ahash_request_set_callback(conn->conn_tx_hash, 0, NULL, NULL);
149
150 return 0;
151}
152
153static int iscsi_login_check_initiator_version(
154 struct iscsi_conn *conn,
155 u8 version_max,
156 u8 version_min)
157{
158 if ((version_max != 0x00) || (version_min != 0x00)) {
159 pr_err("Unsupported iSCSI IETF Pre-RFC Revision,"
160 " version Min/Max 0x%02x/0x%02x, rejecting login.\n",
161 version_min, version_max);
162 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
163 ISCSI_LOGIN_STATUS_NO_VERSION);
164 return -1;
165 }
166
167 return 0;
168}
169
170int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
171{
172 int sessiontype;
173 struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL;
174 struct iscsi_portal_group *tpg = conn->tpg;
175 struct iscsi_session *sess = NULL, *sess_p = NULL;
176 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
177 struct se_session *se_sess, *se_sess_tmp;
178
179 initiatorname_param = iscsi_find_param_from_key(
180 INITIATORNAME, conn->param_list);
181 sessiontype_param = iscsi_find_param_from_key(
182 SESSIONTYPE, conn->param_list);
183 if (!initiatorname_param || !sessiontype_param) {
184 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
185 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
186 return -1;
187 }
188
189 sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;
190
191 spin_lock_bh(&se_tpg->session_lock);
192 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
193 sess_list) {
194
195 sess_p = se_sess->fabric_sess_ptr;
196 spin_lock(&sess_p->conn_lock);
197 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
198 atomic_read(&sess_p->session_logout) ||
199 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
200 spin_unlock(&sess_p->conn_lock);
201 continue;
202 }
203 if (!memcmp(sess_p->isid, conn->sess->isid, 6) &&
204 (!strcmp(sess_p->sess_ops->InitiatorName,
205 initiatorname_param->value) &&
206 (sess_p->sess_ops->SessionType == sessiontype))) {
207 atomic_set(&sess_p->session_reinstatement, 1);
208 spin_unlock(&sess_p->conn_lock);
209 iscsit_inc_session_usage_count(sess_p);
210 iscsit_stop_time2retain_timer(sess_p);
211 sess = sess_p;
212 break;
213 }
214 spin_unlock(&sess_p->conn_lock);
215 }
216 spin_unlock_bh(&se_tpg->session_lock);
217
218
219
220 if (!sess)
221 return 0;
222
223 pr_debug("%s iSCSI Session SID %u is still active for %s,"
224 " preforming session reinstatement.\n", (sessiontype) ?
225 "Discovery" : "Normal", sess->sid,
226 sess->sess_ops->InitiatorName);
227
228 spin_lock_bh(&sess->conn_lock);
229 if (sess->session_state == TARG_SESS_STATE_FAILED) {
230 spin_unlock_bh(&sess->conn_lock);
231 iscsit_dec_session_usage_count(sess);
232 target_put_session(sess->se_sess);
233 return 0;
234 }
235 spin_unlock_bh(&sess->conn_lock);
236
237 iscsit_stop_session(sess, 1, 1);
238 iscsit_dec_session_usage_count(sess);
239
240 target_put_session(sess->se_sess);
241 return 0;
242}
243
244static void iscsi_login_set_conn_values(
245 struct iscsi_session *sess,
246 struct iscsi_conn *conn,
247 __be16 cid)
248{
249 conn->sess = sess;
250 conn->cid = be16_to_cpu(cid);
251
252
253
254
255 get_random_bytes(&conn->stat_sn, sizeof(u32));
256
257 mutex_lock(&auth_id_lock);
258 conn->auth_id = iscsit_global->auth_id++;
259 mutex_unlock(&auth_id_lock);
260}
261
262__printf(2, 3) int iscsi_change_param_sprintf(
263 struct iscsi_conn *conn,
264 const char *fmt, ...)
265{
266 va_list args;
267 unsigned char buf[64];
268
269 memset(buf, 0, sizeof buf);
270
271 va_start(args, fmt);
272 vsnprintf(buf, sizeof buf, fmt, args);
273 va_end(args);
274
275 if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
276 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
277 ISCSI_LOGIN_STATUS_NO_RESOURCES);
278 return -1;
279 }
280
281 return 0;
282}
283EXPORT_SYMBOL(iscsi_change_param_sprintf);
284
285
286
287
288
289static int iscsi_login_zero_tsih_s1(
290 struct iscsi_conn *conn,
291 unsigned char *buf)
292{
293 struct iscsi_session *sess = NULL;
294 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
295 int ret;
296
297 sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
298 if (!sess) {
299 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
300 ISCSI_LOGIN_STATUS_NO_RESOURCES);
301 pr_err("Could not allocate memory for session\n");
302 return -ENOMEM;
303 }
304
305 iscsi_login_set_conn_values(sess, conn, pdu->cid);
306 sess->init_task_tag = pdu->itt;
307 memcpy(&sess->isid, pdu->isid, 6);
308 sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn);
309 INIT_LIST_HEAD(&sess->sess_conn_list);
310 INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list);
311 INIT_LIST_HEAD(&sess->cr_active_list);
312 INIT_LIST_HEAD(&sess->cr_inactive_list);
313 init_completion(&sess->async_msg_comp);
314 init_completion(&sess->reinstatement_comp);
315 init_completion(&sess->session_wait_comp);
316 init_completion(&sess->session_waiting_on_uc_comp);
317 mutex_init(&sess->cmdsn_mutex);
318 spin_lock_init(&sess->conn_lock);
319 spin_lock_init(&sess->cr_a_lock);
320 spin_lock_init(&sess->cr_i_lock);
321 spin_lock_init(&sess->session_usage_lock);
322 spin_lock_init(&sess->ttt_lock);
323
324 idr_preload(GFP_KERNEL);
325 spin_lock_bh(&sess_idr_lock);
326 ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
327 if (ret >= 0)
328 sess->session_index = ret;
329 spin_unlock_bh(&sess_idr_lock);
330 idr_preload_end();
331
332 if (ret < 0) {
333 pr_err("idr_alloc() for sess_idr failed\n");
334 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
335 ISCSI_LOGIN_STATUS_NO_RESOURCES);
336 kfree(sess);
337 return -ENOMEM;
338 }
339
340 sess->creation_time = get_jiffies_64();
341
342
343
344
345 sess->max_cmd_sn = be32_to_cpu(pdu->cmdsn);
346
347 sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL);
348 if (!sess->sess_ops) {
349 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
350 ISCSI_LOGIN_STATUS_NO_RESOURCES);
351 pr_err("Unable to allocate memory for"
352 " struct iscsi_sess_ops.\n");
353 kfree(sess);
354 return -ENOMEM;
355 }
356
357 sess->se_sess = transport_init_session(TARGET_PROT_NORMAL);
358 if (IS_ERR(sess->se_sess)) {
359 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
360 ISCSI_LOGIN_STATUS_NO_RESOURCES);
361 kfree(sess);
362 return -ENOMEM;
363 }
364
365 return 0;
366}
367
368static int iscsi_login_zero_tsih_s2(
369 struct iscsi_conn *conn)
370{
371 struct iscsi_node_attrib *na;
372 struct iscsi_session *sess = conn->sess;
373 bool iser = false;
374
375 sess->tpg = conn->tpg;
376
377
378
379
380
381 sess->tsih = ++sess->tpg->ntsih;
382 if (!sess->tsih)
383 sess->tsih = ++sess->tpg->ntsih;
384
385
386
387
388 if (iscsi_copy_param_list(&conn->param_list,
389 conn->tpg->param_list, 1) < 0) {
390 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
391 ISCSI_LOGIN_STATUS_NO_RESOURCES);
392 return -1;
393 }
394
395 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
396 iser = true;
397
398 iscsi_set_keys_to_negotiate(conn->param_list, iser);
399
400 if (sess->sess_ops->SessionType)
401 return iscsi_set_keys_irrelevant_for_discovery(
402 conn->param_list);
403
404 na = iscsit_tpg_get_node_attrib(sess);
405
406
407
408
409
410
411
412
413 if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt))
414 return -1;
415
416
417
418
419
420
421 if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl))
422 return -1;
423
424 if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0)
425 return -1;
426
427
428
429 if (iser) {
430 struct iscsi_param *param;
431 unsigned long mrdsl, off;
432 int rc;
433
434 if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes"))
435 return -1;
436
437
438
439
440
441 param = iscsi_find_param_from_key("MaxRecvDataSegmentLength",
442 conn->param_list);
443 if (!param) {
444 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
445 ISCSI_LOGIN_STATUS_NO_RESOURCES);
446 return -1;
447 }
448 rc = kstrtoul(param->value, 0, &mrdsl);
449 if (rc < 0) {
450 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
451 ISCSI_LOGIN_STATUS_NO_RESOURCES);
452 return -1;
453 }
454 off = mrdsl % PAGE_SIZE;
455 if (!off)
456 goto check_prot;
457
458 if (mrdsl < PAGE_SIZE)
459 mrdsl = PAGE_SIZE;
460 else
461 mrdsl -= off;
462
463 pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down"
464 " to PAGE_SIZE\n", mrdsl);
465
466 if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl))
467 return -1;
468
469
470
471
472check_prot:
473 if (sess->se_sess->sup_prot_ops &
474 (TARGET_PROT_DOUT_STRIP | TARGET_PROT_DOUT_PASS |
475 TARGET_PROT_DOUT_INSERT)) {
476
477 if (iscsi_change_param_sprintf(conn, "ImmediateData=No"))
478 return -1;
479
480 if (iscsi_change_param_sprintf(conn, "InitialR2T=Yes"))
481 return -1;
482
483 pr_debug("Forcing ImmediateData=No + InitialR2T=Yes for"
484 " T10-PI enabled ISER session\n");
485 }
486 }
487
488 return 0;
489}
490
491
492
493
494
495int iscsi_login_disable_FIM_keys(
496 struct iscsi_param_list *param_list,
497 struct iscsi_conn *conn)
498{
499 struct iscsi_param *param;
500
501 param = iscsi_find_param_from_key("OFMarker", param_list);
502 if (!param) {
503 pr_err("iscsi_find_param_from_key() for"
504 " OFMarker failed\n");
505 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
506 ISCSI_LOGIN_STATUS_NO_RESOURCES);
507 return -1;
508 }
509 param->state &= ~PSTATE_NEGOTIATE;
510
511 param = iscsi_find_param_from_key("OFMarkInt", param_list);
512 if (!param) {
513 pr_err("iscsi_find_param_from_key() for"
514 " IFMarker failed\n");
515 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
516 ISCSI_LOGIN_STATUS_NO_RESOURCES);
517 return -1;
518 }
519 param->state &= ~PSTATE_NEGOTIATE;
520
521 param = iscsi_find_param_from_key("IFMarker", param_list);
522 if (!param) {
523 pr_err("iscsi_find_param_from_key() for"
524 " IFMarker failed\n");
525 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
526 ISCSI_LOGIN_STATUS_NO_RESOURCES);
527 return -1;
528 }
529 param->state &= ~PSTATE_NEGOTIATE;
530
531 param = iscsi_find_param_from_key("IFMarkInt", param_list);
532 if (!param) {
533 pr_err("iscsi_find_param_from_key() for"
534 " IFMarker failed\n");
535 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
536 ISCSI_LOGIN_STATUS_NO_RESOURCES);
537 return -1;
538 }
539 param->state &= ~PSTATE_NEGOTIATE;
540
541 return 0;
542}
543
544static int iscsi_login_non_zero_tsih_s1(
545 struct iscsi_conn *conn,
546 unsigned char *buf)
547{
548 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
549
550 iscsi_login_set_conn_values(NULL, conn, pdu->cid);
551 return 0;
552}
553
554
555
556
557static int iscsi_login_non_zero_tsih_s2(
558 struct iscsi_conn *conn,
559 unsigned char *buf)
560{
561 struct iscsi_portal_group *tpg = conn->tpg;
562 struct iscsi_session *sess = NULL, *sess_p = NULL;
563 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
564 struct se_session *se_sess, *se_sess_tmp;
565 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
566 bool iser = false;
567
568 spin_lock_bh(&se_tpg->session_lock);
569 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
570 sess_list) {
571
572 sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr;
573 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
574 atomic_read(&sess_p->session_logout) ||
575 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED))
576 continue;
577 if (!memcmp(sess_p->isid, pdu->isid, 6) &&
578 (sess_p->tsih == be16_to_cpu(pdu->tsih))) {
579 iscsit_inc_session_usage_count(sess_p);
580 iscsit_stop_time2retain_timer(sess_p);
581 sess = sess_p;
582 break;
583 }
584 }
585 spin_unlock_bh(&se_tpg->session_lock);
586
587
588
589
590 if (!sess) {
591 pr_err("Initiator attempting to add a connection to"
592 " a non-existent session, rejecting iSCSI Login.\n");
593 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
594 ISCSI_LOGIN_STATUS_NO_SESSION);
595 return -1;
596 }
597
598
599
600
601
602 spin_lock_bh(&sess->conn_lock);
603 if (sess->session_state == TARG_SESS_STATE_FAILED)
604 atomic_set(&sess->session_continuation, 1);
605 spin_unlock_bh(&sess->conn_lock);
606
607 iscsi_login_set_conn_values(sess, conn, pdu->cid);
608
609 if (iscsi_copy_param_list(&conn->param_list,
610 conn->tpg->param_list, 0) < 0) {
611 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
612 ISCSI_LOGIN_STATUS_NO_RESOURCES);
613 return -1;
614 }
615
616 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
617 iser = true;
618
619 iscsi_set_keys_to_negotiate(conn->param_list, iser);
620
621
622
623
624
625
626
627 if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt))
628 return -1;
629
630 return iscsi_login_disable_FIM_keys(conn->param_list, conn);
631}
632
633int iscsi_login_post_auth_non_zero_tsih(
634 struct iscsi_conn *conn,
635 u16 cid,
636 u32 exp_statsn)
637{
638 struct iscsi_conn *conn_ptr = NULL;
639 struct iscsi_conn_recovery *cr = NULL;
640 struct iscsi_session *sess = conn->sess;
641
642
643
644
645
646
647
648
649 conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid);
650 if (conn_ptr) {
651 pr_err("Connection exists with CID %hu for %s,"
652 " performing connection reinstatement.\n",
653 conn_ptr->cid, sess->sess_ops->InitiatorName);
654
655 iscsit_connection_reinstatement_rcfr(conn_ptr);
656 iscsit_dec_conn_usage_count(conn_ptr);
657 }
658
659
660
661
662
663
664
665
666
667
668 if (sess->sess_ops->ErrorRecoveryLevel == 2) {
669 cr = iscsit_get_inactive_connection_recovery_entry(
670 sess, cid);
671 if (cr) {
672 pr_debug("Performing implicit logout"
673 " for connection recovery on CID: %hu\n",
674 conn->cid);
675 iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn);
676 }
677 }
678
679
680
681
682
683
684
685 pr_debug("Adding CID %hu to existing session for %s.\n",
686 cid, sess->sess_ops->InitiatorName);
687
688 if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) {
689 pr_err("Adding additional connection to this session"
690 " would exceed MaxConnections %d, login failed.\n",
691 sess->sess_ops->MaxConnections);
692 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
693 ISCSI_LOGIN_STATUS_ISID_ERROR);
694 return -1;
695 }
696
697 return 0;
698}
699
700static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
701{
702 struct iscsi_session *sess = conn->sess;
703
704
705
706 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
707 return;
708
709 if (!sess->sess_ops->SessionType)
710 iscsit_start_nopin_timer(conn);
711}
712
713int iscsit_start_kthreads(struct iscsi_conn *conn)
714{
715 int ret = 0;
716
717 spin_lock(&iscsit_global->ts_bitmap_lock);
718 conn->bitmap_id = bitmap_find_free_region(iscsit_global->ts_bitmap,
719 ISCSIT_BITMAP_BITS, get_order(1));
720 spin_unlock(&iscsit_global->ts_bitmap_lock);
721
722 if (conn->bitmap_id < 0) {
723 pr_err("bitmap_find_free_region() failed for"
724 " iscsit_start_kthreads()\n");
725 return -ENOMEM;
726 }
727
728 conn->tx_thread = kthread_run(iscsi_target_tx_thread, conn,
729 "%s", ISCSI_TX_THREAD_NAME);
730 if (IS_ERR(conn->tx_thread)) {
731 pr_err("Unable to start iscsi_target_tx_thread\n");
732 ret = PTR_ERR(conn->tx_thread);
733 goto out_bitmap;
734 }
735 conn->tx_thread_active = true;
736
737 conn->rx_thread = kthread_run(iscsi_target_rx_thread, conn,
738 "%s", ISCSI_RX_THREAD_NAME);
739 if (IS_ERR(conn->rx_thread)) {
740 pr_err("Unable to start iscsi_target_rx_thread\n");
741 ret = PTR_ERR(conn->rx_thread);
742 goto out_tx;
743 }
744 conn->rx_thread_active = true;
745
746 return 0;
747out_tx:
748 send_sig(SIGINT, conn->tx_thread, 1);
749 kthread_stop(conn->tx_thread);
750 conn->tx_thread_active = false;
751out_bitmap:
752 spin_lock(&iscsit_global->ts_bitmap_lock);
753 bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id,
754 get_order(1));
755 spin_unlock(&iscsit_global->ts_bitmap_lock);
756 return ret;
757}
758
759void iscsi_post_login_handler(
760 struct iscsi_np *np,
761 struct iscsi_conn *conn,
762 u8 zero_tsih)
763{
764 int stop_timer = 0;
765 struct iscsi_session *sess = conn->sess;
766 struct se_session *se_sess = sess->se_sess;
767 struct iscsi_portal_group *tpg = sess->tpg;
768 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
769
770 iscsit_inc_conn_usage_count(conn);
771
772 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS,
773 ISCSI_LOGIN_STATUS_ACCEPT);
774
775 pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n");
776 conn->conn_state = TARG_CONN_STATE_LOGGED_IN;
777
778 iscsi_set_connection_parameters(conn->conn_ops, conn->param_list);
779 iscsit_set_sync_and_steering_values(conn);
780
781
782
783 if (!zero_tsih) {
784 iscsi_set_session_parameters(sess->sess_ops,
785 conn->param_list, 0);
786 iscsi_release_param_list(conn->param_list);
787 conn->param_list = NULL;
788
789 spin_lock_bh(&sess->conn_lock);
790 atomic_set(&sess->session_continuation, 0);
791 if (sess->session_state == TARG_SESS_STATE_FAILED) {
792 pr_debug("Moving to"
793 " TARG_SESS_STATE_LOGGED_IN.\n");
794 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
795 stop_timer = 1;
796 }
797
798 pr_debug("iSCSI Login successful on CID: %hu from %pISpc to"
799 " %pISpc,%hu\n", conn->cid, &conn->login_sockaddr,
800 &conn->local_sockaddr, tpg->tpgt);
801
802 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
803 atomic_inc(&sess->nconn);
804 pr_debug("Incremented iSCSI Connection count to %hu"
805 " from node: %s\n", atomic_read(&sess->nconn),
806 sess->sess_ops->InitiatorName);
807 spin_unlock_bh(&sess->conn_lock);
808
809 iscsi_post_login_start_timers(conn);
810
811
812
813
814 iscsit_thread_get_cpumask(conn);
815 conn->conn_rx_reset_cpumask = 1;
816 conn->conn_tx_reset_cpumask = 1;
817
818
819
820
821 complete(&conn->rx_login_comp);
822 iscsit_dec_conn_usage_count(conn);
823
824 if (stop_timer) {
825 spin_lock_bh(&se_tpg->session_lock);
826 iscsit_stop_time2retain_timer(sess);
827 spin_unlock_bh(&se_tpg->session_lock);
828 }
829 iscsit_dec_session_usage_count(sess);
830 return;
831 }
832
833 iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1);
834 iscsi_release_param_list(conn->param_list);
835 conn->param_list = NULL;
836
837 iscsit_determine_maxcmdsn(sess);
838
839 spin_lock_bh(&se_tpg->session_lock);
840 __transport_register_session(&sess->tpg->tpg_se_tpg,
841 se_sess->se_node_acl, se_sess, sess);
842 pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n");
843 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
844
845 pr_debug("iSCSI Login successful on CID: %hu from %pISpc to %pISpc,%hu\n",
846 conn->cid, &conn->login_sockaddr, &conn->local_sockaddr,
847 tpg->tpgt);
848
849 spin_lock_bh(&sess->conn_lock);
850 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
851 atomic_inc(&sess->nconn);
852 pr_debug("Incremented iSCSI Connection count to %hu from node:"
853 " %s\n", atomic_read(&sess->nconn),
854 sess->sess_ops->InitiatorName);
855 spin_unlock_bh(&sess->conn_lock);
856
857 sess->sid = tpg->sid++;
858 if (!sess->sid)
859 sess->sid = tpg->sid++;
860 pr_debug("Established iSCSI session from node: %s\n",
861 sess->sess_ops->InitiatorName);
862
863 tpg->nsessions++;
864 if (tpg->tpg_tiqn)
865 tpg->tpg_tiqn->tiqn_nsessions++;
866
867 pr_debug("Incremented number of active iSCSI sessions to %u on"
868 " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt);
869 spin_unlock_bh(&se_tpg->session_lock);
870
871 iscsi_post_login_start_timers(conn);
872
873
874
875
876 iscsit_thread_get_cpumask(conn);
877 conn->conn_rx_reset_cpumask = 1;
878 conn->conn_tx_reset_cpumask = 1;
879
880
881
882
883 complete(&conn->rx_login_comp);
884 iscsit_dec_conn_usage_count(conn);
885}
886
887static void iscsi_handle_login_thread_timeout(unsigned long data)
888{
889 struct iscsi_np *np = (struct iscsi_np *) data;
890
891 spin_lock_bh(&np->np_thread_lock);
892 pr_err("iSCSI Login timeout on Network Portal %pISpc\n",
893 &np->np_sockaddr);
894
895 if (np->np_login_timer_flags & ISCSI_TF_STOP) {
896 spin_unlock_bh(&np->np_thread_lock);
897 return;
898 }
899
900 if (np->np_thread)
901 send_sig(SIGINT, np->np_thread, 1);
902
903 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
904 spin_unlock_bh(&np->np_thread_lock);
905}
906
907static void iscsi_start_login_thread_timer(struct iscsi_np *np)
908{
909
910
911
912
913 spin_lock_bh(&np->np_thread_lock);
914 init_timer(&np->np_login_timer);
915 np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
916 np->np_login_timer.data = (unsigned long)np;
917 np->np_login_timer.function = iscsi_handle_login_thread_timeout;
918 np->np_login_timer_flags &= ~ISCSI_TF_STOP;
919 np->np_login_timer_flags |= ISCSI_TF_RUNNING;
920 add_timer(&np->np_login_timer);
921
922 pr_debug("Added timeout timer to iSCSI login request for"
923 " %u seconds.\n", TA_LOGIN_TIMEOUT);
924 spin_unlock_bh(&np->np_thread_lock);
925}
926
927static void iscsi_stop_login_thread_timer(struct iscsi_np *np)
928{
929 spin_lock_bh(&np->np_thread_lock);
930 if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) {
931 spin_unlock_bh(&np->np_thread_lock);
932 return;
933 }
934 np->np_login_timer_flags |= ISCSI_TF_STOP;
935 spin_unlock_bh(&np->np_thread_lock);
936
937 del_timer_sync(&np->np_login_timer);
938
939 spin_lock_bh(&np->np_thread_lock);
940 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
941 spin_unlock_bh(&np->np_thread_lock);
942}
943
944int iscsit_setup_np(
945 struct iscsi_np *np,
946 struct sockaddr_storage *sockaddr)
947{
948 struct socket *sock = NULL;
949 int backlog = ISCSIT_TCP_BACKLOG, ret, opt = 0, len;
950
951 switch (np->np_network_transport) {
952 case ISCSI_TCP:
953 np->np_ip_proto = IPPROTO_TCP;
954 np->np_sock_type = SOCK_STREAM;
955 break;
956 case ISCSI_SCTP_TCP:
957 np->np_ip_proto = IPPROTO_SCTP;
958 np->np_sock_type = SOCK_STREAM;
959 break;
960 case ISCSI_SCTP_UDP:
961 np->np_ip_proto = IPPROTO_SCTP;
962 np->np_sock_type = SOCK_SEQPACKET;
963 break;
964 default:
965 pr_err("Unsupported network_transport: %d\n",
966 np->np_network_transport);
967 return -EINVAL;
968 }
969
970 np->np_ip_proto = IPPROTO_TCP;
971 np->np_sock_type = SOCK_STREAM;
972
973 ret = sock_create(sockaddr->ss_family, np->np_sock_type,
974 np->np_ip_proto, &sock);
975 if (ret < 0) {
976 pr_err("sock_create() failed.\n");
977 return ret;
978 }
979 np->np_socket = sock;
980
981
982
983
984 memcpy(&np->np_sockaddr, sockaddr,
985 sizeof(struct sockaddr_storage));
986
987 if (sockaddr->ss_family == AF_INET6)
988 len = sizeof(struct sockaddr_in6);
989 else
990 len = sizeof(struct sockaddr_in);
991
992
993
994
995 opt = 1;
996 if (np->np_network_transport == ISCSI_TCP) {
997 ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
998 (char *)&opt, sizeof(opt));
999 if (ret < 0) {
1000 pr_err("kernel_setsockopt() for TCP_NODELAY"
1001 " failed: %d\n", ret);
1002 goto fail;
1003 }
1004 }
1005
1006
1007 ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
1008 (char *)&opt, sizeof(opt));
1009 if (ret < 0) {
1010 pr_err("kernel_setsockopt() for SO_REUSEADDR"
1011 " failed\n");
1012 goto fail;
1013 }
1014
1015 ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND,
1016 (char *)&opt, sizeof(opt));
1017 if (ret < 0) {
1018 pr_err("kernel_setsockopt() for IP_FREEBIND"
1019 " failed\n");
1020 goto fail;
1021 }
1022
1023 ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len);
1024 if (ret < 0) {
1025 pr_err("kernel_bind() failed: %d\n", ret);
1026 goto fail;
1027 }
1028
1029 ret = kernel_listen(sock, backlog);
1030 if (ret != 0) {
1031 pr_err("kernel_listen() failed: %d\n", ret);
1032 goto fail;
1033 }
1034
1035 return 0;
1036fail:
1037 np->np_socket = NULL;
1038 sock_release(sock);
1039 return ret;
1040}
1041
1042int iscsi_target_setup_login_socket(
1043 struct iscsi_np *np,
1044 struct sockaddr_storage *sockaddr)
1045{
1046 struct iscsit_transport *t;
1047 int rc;
1048
1049 t = iscsit_get_transport(np->np_network_transport);
1050 if (!t)
1051 return -EINVAL;
1052
1053 rc = t->iscsit_setup_np(np, sockaddr);
1054 if (rc < 0) {
1055 iscsit_put_transport(t);
1056 return rc;
1057 }
1058
1059 np->np_transport = t;
1060 np->enabled = true;
1061 return 0;
1062}
1063
1064int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn)
1065{
1066 struct socket *new_sock, *sock = np->np_socket;
1067 struct sockaddr_in sock_in;
1068 struct sockaddr_in6 sock_in6;
1069 int rc, err;
1070
1071 rc = kernel_accept(sock, &new_sock, 0);
1072 if (rc < 0)
1073 return rc;
1074
1075 conn->sock = new_sock;
1076 conn->login_family = np->np_sockaddr.ss_family;
1077
1078 if (np->np_sockaddr.ss_family == AF_INET6) {
1079 memset(&sock_in6, 0, sizeof(struct sockaddr_in6));
1080
1081 rc = conn->sock->ops->getname(conn->sock,
1082 (struct sockaddr *)&sock_in6, &err, 1);
1083 if (!rc) {
1084 if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) {
1085 memcpy(&conn->login_sockaddr, &sock_in6, sizeof(sock_in6));
1086 } else {
1087
1088 sock_in.sin_family = AF_INET;
1089 sock_in.sin_port = sock_in6.sin6_port;
1090 memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4);
1091 memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in));
1092 }
1093 }
1094
1095 rc = conn->sock->ops->getname(conn->sock,
1096 (struct sockaddr *)&sock_in6, &err, 0);
1097 if (!rc) {
1098 if (!ipv6_addr_v4mapped(&sock_in6.sin6_addr)) {
1099 memcpy(&conn->local_sockaddr, &sock_in6, sizeof(sock_in6));
1100 } else {
1101
1102 sock_in.sin_family = AF_INET;
1103 sock_in.sin_port = sock_in6.sin6_port;
1104 memcpy(&sock_in.sin_addr, &sock_in6.sin6_addr.s6_addr32[3], 4);
1105 memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in));
1106 }
1107 }
1108 } else {
1109 memset(&sock_in, 0, sizeof(struct sockaddr_in));
1110
1111 rc = conn->sock->ops->getname(conn->sock,
1112 (struct sockaddr *)&sock_in, &err, 1);
1113 if (!rc)
1114 memcpy(&conn->login_sockaddr, &sock_in, sizeof(sock_in));
1115
1116 rc = conn->sock->ops->getname(conn->sock,
1117 (struct sockaddr *)&sock_in, &err, 0);
1118 if (!rc)
1119 memcpy(&conn->local_sockaddr, &sock_in, sizeof(sock_in));
1120 }
1121
1122 return 0;
1123}
1124
1125int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
1126{
1127 struct iscsi_login_req *login_req;
1128 u32 padding = 0, payload_length;
1129
1130 if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0)
1131 return -1;
1132
1133 login_req = (struct iscsi_login_req *)login->req;
1134 payload_length = ntoh24(login_req->dlength);
1135 padding = ((-payload_length) & 3);
1136
1137 pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
1138 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n",
1139 login_req->flags, login_req->itt, login_req->cmdsn,
1140 login_req->exp_statsn, login_req->cid, payload_length);
1141
1142
1143
1144
1145 if (login->first_request) {
1146 login_req = (struct iscsi_login_req *)login->req;
1147 login->leading_connection = (!login_req->tsih) ? 1 : 0;
1148 login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags);
1149 login->version_min = login_req->min_version;
1150 login->version_max = login_req->max_version;
1151 memcpy(login->isid, login_req->isid, 6);
1152 login->cmd_sn = be32_to_cpu(login_req->cmdsn);
1153 login->init_task_tag = login_req->itt;
1154 login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn);
1155 login->cid = be16_to_cpu(login_req->cid);
1156 login->tsih = be16_to_cpu(login_req->tsih);
1157 }
1158
1159 if (iscsi_target_check_login_request(conn, login) < 0)
1160 return -1;
1161
1162 memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS);
1163 if (iscsi_login_rx_data(conn, login->req_buf,
1164 payload_length + padding) < 0)
1165 return -1;
1166
1167 return 0;
1168}
1169
1170int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
1171 u32 length)
1172{
1173 if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0)
1174 return -1;
1175
1176 return 0;
1177}
1178
1179static int
1180iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t)
1181{
1182 int rc;
1183
1184 if (!t->owner) {
1185 conn->conn_transport = t;
1186 return 0;
1187 }
1188
1189 rc = try_module_get(t->owner);
1190 if (!rc) {
1191 pr_err("try_module_get() failed for %s\n", t->name);
1192 return -EINVAL;
1193 }
1194
1195 conn->conn_transport = t;
1196 return 0;
1197}
1198
1199void iscsi_target_login_sess_out(struct iscsi_conn *conn,
1200 struct iscsi_np *np, bool zero_tsih, bool new_sess)
1201{
1202 if (!new_sess)
1203 goto old_sess_out;
1204
1205 pr_err("iSCSI Login negotiation failed.\n");
1206 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1207 ISCSI_LOGIN_STATUS_INIT_ERR);
1208 if (!zero_tsih || !conn->sess)
1209 goto old_sess_out;
1210 if (conn->sess->se_sess)
1211 transport_free_session(conn->sess->se_sess);
1212 if (conn->sess->session_index != 0) {
1213 spin_lock_bh(&sess_idr_lock);
1214 idr_remove(&sess_idr, conn->sess->session_index);
1215 spin_unlock_bh(&sess_idr_lock);
1216 }
1217 kfree(conn->sess->sess_ops);
1218 kfree(conn->sess);
1219 conn->sess = NULL;
1220
1221old_sess_out:
1222 iscsi_stop_login_thread_timer(np);
1223
1224
1225
1226
1227 if (!zero_tsih && conn->sess) {
1228 spin_lock_bh(&conn->sess->conn_lock);
1229 if (conn->sess->session_state == TARG_SESS_STATE_FAILED) {
1230 struct se_portal_group *se_tpg =
1231 &conn->tpg->tpg_se_tpg;
1232
1233 atomic_set(&conn->sess->session_continuation, 0);
1234 spin_unlock_bh(&conn->sess->conn_lock);
1235 spin_lock_bh(&se_tpg->session_lock);
1236 iscsit_start_time2retain_handler(conn->sess);
1237 spin_unlock_bh(&se_tpg->session_lock);
1238 } else
1239 spin_unlock_bh(&conn->sess->conn_lock);
1240 iscsit_dec_session_usage_count(conn->sess);
1241 }
1242
1243 ahash_request_free(conn->conn_tx_hash);
1244 if (conn->conn_rx_hash) {
1245 struct crypto_ahash *tfm;
1246
1247 tfm = crypto_ahash_reqtfm(conn->conn_rx_hash);
1248 ahash_request_free(conn->conn_rx_hash);
1249 crypto_free_ahash(tfm);
1250 }
1251
1252 free_cpumask_var(conn->conn_cpumask);
1253
1254 kfree(conn->conn_ops);
1255
1256 if (conn->param_list) {
1257 iscsi_release_param_list(conn->param_list);
1258 conn->param_list = NULL;
1259 }
1260 iscsi_target_nego_release(conn);
1261
1262 if (conn->sock) {
1263 sock_release(conn->sock);
1264 conn->sock = NULL;
1265 }
1266
1267 if (conn->conn_transport->iscsit_wait_conn)
1268 conn->conn_transport->iscsit_wait_conn(conn);
1269
1270 if (conn->conn_transport->iscsit_free_conn)
1271 conn->conn_transport->iscsit_free_conn(conn);
1272
1273 iscsit_put_transport(conn->conn_transport);
1274 kfree(conn);
1275}
1276
1277static int __iscsi_target_login_thread(struct iscsi_np *np)
1278{
1279 u8 *buffer, zero_tsih = 0;
1280 int ret = 0, rc;
1281 struct iscsi_conn *conn = NULL;
1282 struct iscsi_login *login;
1283 struct iscsi_portal_group *tpg = NULL;
1284 struct iscsi_login_req *pdu;
1285 struct iscsi_tpg_np *tpg_np;
1286 bool new_sess = false;
1287
1288 flush_signals(current);
1289
1290 spin_lock_bh(&np->np_thread_lock);
1291 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
1292 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
1293 complete(&np->np_restart_comp);
1294 } else if (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN) {
1295 spin_unlock_bh(&np->np_thread_lock);
1296 goto exit;
1297 } else {
1298 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
1299 }
1300 spin_unlock_bh(&np->np_thread_lock);
1301
1302 conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
1303 if (!conn) {
1304 pr_err("Could not allocate memory for"
1305 " new connection\n");
1306
1307 return 1;
1308 }
1309 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
1310 conn->conn_state = TARG_CONN_STATE_FREE;
1311
1312 if (iscsit_conn_set_transport(conn, np->np_transport) < 0) {
1313 kfree(conn);
1314 return 1;
1315 }
1316
1317 rc = np->np_transport->iscsit_accept_np(np, conn);
1318 if (rc == -ENOSYS) {
1319 complete(&np->np_restart_comp);
1320 iscsit_put_transport(conn->conn_transport);
1321 kfree(conn);
1322 conn = NULL;
1323 goto exit;
1324 } else if (rc < 0) {
1325 spin_lock_bh(&np->np_thread_lock);
1326 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
1327 spin_unlock_bh(&np->np_thread_lock);
1328 complete(&np->np_restart_comp);
1329 iscsit_put_transport(conn->conn_transport);
1330 kfree(conn);
1331 conn = NULL;
1332
1333 return 1;
1334 }
1335 spin_unlock_bh(&np->np_thread_lock);
1336 iscsit_put_transport(conn->conn_transport);
1337 kfree(conn);
1338 conn = NULL;
1339 goto out;
1340 }
1341
1342
1343
1344 login = iscsi_login_init_conn(conn);
1345 if (!login) {
1346 goto new_sess_out;
1347 }
1348
1349 iscsi_start_login_thread_timer(np);
1350
1351 pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
1352 conn->conn_state = TARG_CONN_STATE_XPT_UP;
1353
1354
1355
1356 rc = np->np_transport->iscsit_get_login_rx(conn, login);
1357 if (rc == 1)
1358 return 1;
1359 else if (rc < 0)
1360 goto new_sess_out;
1361
1362 buffer = &login->req[0];
1363 pdu = (struct iscsi_login_req *)buffer;
1364
1365
1366
1367
1368 conn->login_itt = pdu->itt;
1369
1370 spin_lock_bh(&np->np_thread_lock);
1371 if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
1372 spin_unlock_bh(&np->np_thread_lock);
1373 pr_err("iSCSI Network Portal on %pISpc currently not"
1374 " active.\n", &np->np_sockaddr);
1375 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1376 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1377 goto new_sess_out;
1378 }
1379 spin_unlock_bh(&np->np_thread_lock);
1380
1381 conn->network_transport = np->np_network_transport;
1382
1383 pr_debug("Received iSCSI login request from %pISpc on %s Network"
1384 " Portal %pISpc\n", &conn->login_sockaddr, np->np_transport->name,
1385 &conn->local_sockaddr);
1386
1387 pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
1388 conn->conn_state = TARG_CONN_STATE_IN_LOGIN;
1389
1390 if (iscsi_login_check_initiator_version(conn, pdu->max_version,
1391 pdu->min_version) < 0)
1392 goto new_sess_out;
1393
1394 zero_tsih = (pdu->tsih == 0x0000);
1395 if (zero_tsih) {
1396
1397
1398
1399
1400
1401 if (iscsi_login_zero_tsih_s1(conn, buffer) < 0)
1402 goto new_sess_out;
1403 } else {
1404
1405
1406
1407
1408
1409
1410
1411 if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0)
1412 goto new_sess_out;
1413 }
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423 rc = iscsi_target_locate_portal(np, conn, login);
1424 if (rc < 0) {
1425 tpg = conn->tpg;
1426 goto new_sess_out;
1427 }
1428 login->zero_tsih = zero_tsih;
1429
1430 conn->sess->se_sess->sup_prot_ops =
1431 conn->conn_transport->iscsit_get_sup_prot_ops(conn);
1432
1433 tpg = conn->tpg;
1434 if (!tpg) {
1435 pr_err("Unable to locate struct iscsi_conn->tpg\n");
1436 goto new_sess_out;
1437 }
1438
1439 if (zero_tsih) {
1440 if (iscsi_login_zero_tsih_s2(conn) < 0)
1441 goto new_sess_out;
1442 } else {
1443 if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0)
1444 goto old_sess_out;
1445 }
1446
1447 if (conn->conn_transport->iscsit_validate_params) {
1448 ret = conn->conn_transport->iscsit_validate_params(conn);
1449 if (ret < 0) {
1450 if (zero_tsih)
1451 goto new_sess_out;
1452 else
1453 goto old_sess_out;
1454 }
1455 }
1456
1457 ret = iscsi_target_start_negotiation(login, conn);
1458 if (ret < 0)
1459 goto new_sess_out;
1460
1461 iscsi_stop_login_thread_timer(np);
1462
1463 if (ret == 1) {
1464 tpg_np = conn->tpg_np;
1465
1466 iscsi_post_login_handler(np, conn, zero_tsih);
1467 iscsit_deaccess_np(np, tpg, tpg_np);
1468 }
1469
1470 tpg = NULL;
1471 tpg_np = NULL;
1472
1473 return 1;
1474
1475new_sess_out:
1476 new_sess = true;
1477old_sess_out:
1478 tpg_np = conn->tpg_np;
1479 iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess);
1480 new_sess = false;
1481
1482 if (tpg) {
1483 iscsit_deaccess_np(np, tpg, tpg_np);
1484 tpg = NULL;
1485 tpg_np = NULL;
1486 }
1487
1488out:
1489 return 1;
1490
1491exit:
1492 iscsi_stop_login_thread_timer(np);
1493 spin_lock_bh(&np->np_thread_lock);
1494 np->np_thread_state = ISCSI_NP_THREAD_EXIT;
1495 spin_unlock_bh(&np->np_thread_lock);
1496
1497 return 0;
1498}
1499
1500int iscsi_target_login_thread(void *arg)
1501{
1502 struct iscsi_np *np = arg;
1503 int ret;
1504
1505 allow_signal(SIGINT);
1506
1507 while (1) {
1508 ret = __iscsi_target_login_thread(np);
1509
1510
1511
1512
1513 if (ret != 1)
1514 break;
1515 }
1516
1517 return 0;
1518}
1519
