?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
iscsi-target: Re-add chunk from backport of upstream 79d59d08082d to 3.10
[linux/fpc-iii.git] / drivers / target / iscsi / iscsi_target_login.c
blobe14e105acff8f8bd1d7b5498621ab644a817b2b9
1 /*******************************************************************************
2 * This file contains the login functions used by the iSCSI Target driver.
3 *
4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
5 *
6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
7 *
8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 ******************************************************************************/
20
21 #include <linux/string.h>
22 #include <linux/kthread.h>
23 #include <linux/crypto.h>
24 #include <linux/idr.h>
25 #include <scsi/iscsi_proto.h>
26 #include <target/target_core_base.h>
27 #include <target/target_core_fabric.h>
28
29 #include "iscsi_target_core.h"
30 #include "iscsi_target_tq.h"
31 #include "iscsi_target_device.h"
32 #include "iscsi_target_nego.h"
33 #include "iscsi_target_erl0.h"
34 #include "iscsi_target_erl2.h"
35 #include "iscsi_target_login.h"
36 #include "iscsi_target_stat.h"
37 #include "iscsi_target_tpg.h"
38 #include "iscsi_target_util.h"
39 #include "iscsi_target.h"
40 #include "iscsi_target_parameters.h"
41
42 #include <target/iscsi/iscsi_transport.h>
43
44 static struct iscsi_login *iscsi_login_init_conn(struct iscsi_conn *conn)
45 {
46 struct iscsi_login *login;
47
48 login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
49 if (!login) {
50 pr_err("Unable to allocate memory for struct iscsi_login.\n");
51 return NULL;
52 }
53 login->conn = conn;
54 login->first_request = 1;
55
56 login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
57 if (!login->req_buf) {
58 pr_err("Unable to allocate memory for response buffer.\n");
59 goto out_login;
60 }
61
62 login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
63 if (!login->rsp_buf) {
64 pr_err("Unable to allocate memory for request buffer.\n");
65 goto out_req_buf;
66 }
67
68 conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
69 if (!conn->conn_ops) {
70 pr_err("Unable to allocate memory for"
71 " struct iscsi_conn_ops.\n");
72 goto out_rsp_buf;
73 }
74
75 init_waitqueue_head(&conn->queues_wq);
76 INIT_LIST_HEAD(&conn->conn_list);
77 INIT_LIST_HEAD(&conn->conn_cmd_list);
78 INIT_LIST_HEAD(&conn->immed_queue_list);
79 INIT_LIST_HEAD(&conn->response_queue_list);
80 init_completion(&conn->conn_post_wait_comp);
81 init_completion(&conn->conn_wait_comp);
82 init_completion(&conn->conn_wait_rcfr_comp);
83 init_completion(&conn->conn_waiting_on_uc_comp);
84 init_completion(&conn->conn_logout_comp);
85 init_completion(&conn->rx_half_close_comp);
86 init_completion(&conn->tx_half_close_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
102 out_conn_ops:
103 kfree(conn->conn_ops);
104 out_rsp_buf:
105 kfree(login->rsp_buf);
106 out_req_buf:
107 kfree(login->req_buf);
108 out_login:
109 kfree(login);
110 return NULL;
111 }
112
113 /*
114 * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup
115 * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel
116 */
117 int iscsi_login_setup_crypto(struct iscsi_conn *conn)
118 {
119 /*
120 * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts
121 * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback
122 * to software 1x8 byte slicing from crc32c.ko
123 */
124 conn->conn_rx_hash.flags = 0;
125 conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
126 CRYPTO_ALG_ASYNC);
127 if (IS_ERR(conn->conn_rx_hash.tfm)) {
128 pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
129 return -ENOMEM;
130 }
131
132 conn->conn_tx_hash.flags = 0;
133 conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
134 CRYPTO_ALG_ASYNC);
135 if (IS_ERR(conn->conn_tx_hash.tfm)) {
136 pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n");
137 crypto_free_hash(conn->conn_rx_hash.tfm);
138 return -ENOMEM;
139 }
140
141 return 0;
142 }
143
144 static int iscsi_login_check_initiator_version(
145 struct iscsi_conn *conn,
146 u8 version_max,
147 u8 version_min)
148 {
149 if ((version_max != 0x00) || (version_min != 0x00)) {
150 pr_err("Unsupported iSCSI IETF Pre-RFC Revision,"
151 " version Min/Max 0x%02x/0x%02x, rejecting login.\n",
152 version_min, version_max);
153 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
154 ISCSI_LOGIN_STATUS_NO_VERSION);
155 return -1;
156 }
157
158 return 0;
159 }
160
161 int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
162 {
163 int sessiontype;
164 struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL;
165 struct iscsi_portal_group *tpg = conn->tpg;
166 struct iscsi_session *sess = NULL, *sess_p = NULL;
167 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
168 struct se_session *se_sess, *se_sess_tmp;
169
170 initiatorname_param = iscsi_find_param_from_key(
171 INITIATORNAME, conn->param_list);
172 sessiontype_param = iscsi_find_param_from_key(
173 SESSIONTYPE, conn->param_list);
174 if (!initiatorname_param || !sessiontype_param) {
175 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
176 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
177 return -1;
178 }
179
180 sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;
181
182 spin_lock_bh(&se_tpg->session_lock);
183 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
184 sess_list) {
185
186 sess_p = se_sess->fabric_sess_ptr;
187 spin_lock(&sess_p->conn_lock);
188 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
189 atomic_read(&sess_p->session_logout) ||
190 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
191 spin_unlock(&sess_p->conn_lock);
192 continue;
193 }
194 if (!memcmp(sess_p->isid, conn->sess->isid, 6) &&
195 (!strcmp(sess_p->sess_ops->InitiatorName,
196 initiatorname_param->value) &&
197 (sess_p->sess_ops->SessionType == sessiontype))) {
198 atomic_set(&sess_p->session_reinstatement, 1);
199 spin_unlock(&sess_p->conn_lock);
200 iscsit_inc_session_usage_count(sess_p);
201 iscsit_stop_time2retain_timer(sess_p);
202 sess = sess_p;
203 break;
204 }
205 spin_unlock(&sess_p->conn_lock);
206 }
207 spin_unlock_bh(&se_tpg->session_lock);
208 /*
209 * If the Time2Retain handler has expired, the session is already gone.
210 */
211 if (!sess)
212 return 0;
213
214 pr_debug("%s iSCSI Session SID %u is still active for %s,"
215 " preforming session reinstatement.\n", (sessiontype) ?
216 "Discovery" : "Normal", sess->sid,
217 sess->sess_ops->InitiatorName);
218
219 spin_lock_bh(&sess->conn_lock);
220 if (sess->session_state == TARG_SESS_STATE_FAILED) {
221 spin_unlock_bh(&sess->conn_lock);
222 iscsit_dec_session_usage_count(sess);
223 target_put_session(sess->se_sess);
224 return 0;
225 }
226 spin_unlock_bh(&sess->conn_lock);
227
228 iscsit_stop_session(sess, 1, 1);
229 iscsit_dec_session_usage_count(sess);
230
231 target_put_session(sess->se_sess);
232 return 0;
233 }
234
235 static void iscsi_login_set_conn_values(
236 struct iscsi_session *sess,
237 struct iscsi_conn *conn,
238 __be16 cid)
239 {
240 conn->sess = sess;
241 conn->cid = be16_to_cpu(cid);
242 /*
243 * Generate a random Status sequence number (statsn) for the new
244 * iSCSI connection.
245 */
246 get_random_bytes(&conn->stat_sn, sizeof(u32));
247
248 mutex_lock(&auth_id_lock);
249 conn->auth_id = iscsit_global->auth_id++;
250 mutex_unlock(&auth_id_lock);
251 }
252
253 static __printf(2, 3) int iscsi_change_param_sprintf(
254 struct iscsi_conn *conn,
255 const char *fmt, ...)
256 {
257 va_list args;
258 unsigned char buf[64];
259
260 memset(buf, 0, sizeof buf);
261
262 va_start(args, fmt);
263 vsnprintf(buf, sizeof buf, fmt, args);
264 va_end(args);
265
266 if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
267 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
268 ISCSI_LOGIN_STATUS_NO_RESOURCES);
269 return -1;
270 }
271
272 return 0;
273 }
274
275 /*
276 * This is the leading connection of a new session,
277 * or session reinstatement.
278 */
279 static int iscsi_login_zero_tsih_s1(
280 struct iscsi_conn *conn,
281 unsigned char *buf)
282 {
283 struct iscsi_session *sess = NULL;
284 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
285 int ret;
286
287 sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
288 if (!sess) {
289 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
290 ISCSI_LOGIN_STATUS_NO_RESOURCES);
291 pr_err("Could not allocate memory for session\n");
292 return -ENOMEM;
293 }
294
295 iscsi_login_set_conn_values(sess, conn, pdu->cid);
296 sess->init_task_tag = pdu->itt;
297 memcpy(&sess->isid, pdu->isid, 6);
298 sess->exp_cmd_sn = be32_to_cpu(pdu->cmdsn);
299 INIT_LIST_HEAD(&sess->sess_conn_list);
300 INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list);
301 INIT_LIST_HEAD(&sess->cr_active_list);
302 INIT_LIST_HEAD(&sess->cr_inactive_list);
303 init_completion(&sess->async_msg_comp);
304 init_completion(&sess->reinstatement_comp);
305 init_completion(&sess->session_wait_comp);
306 init_completion(&sess->session_waiting_on_uc_comp);
307 mutex_init(&sess->cmdsn_mutex);
308 spin_lock_init(&sess->conn_lock);
309 spin_lock_init(&sess->cr_a_lock);
310 spin_lock_init(&sess->cr_i_lock);
311 spin_lock_init(&sess->session_usage_lock);
312 spin_lock_init(&sess->ttt_lock);
313
314 idr_preload(GFP_KERNEL);
315 spin_lock_bh(&sess_idr_lock);
316 ret = idr_alloc(&sess_idr, NULL, 0, 0, GFP_NOWAIT);
317 if (ret >= 0)
318 sess->session_index = ret;
319 spin_unlock_bh(&sess_idr_lock);
320 idr_preload_end();
321
322 if (ret < 0) {
323 pr_err("idr_alloc() for sess_idr failed\n");
324 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
325 ISCSI_LOGIN_STATUS_NO_RESOURCES);
326 kfree(sess);
327 return -ENOMEM;
328 }
329
330 sess->creation_time = get_jiffies_64();
331 spin_lock_init(&sess->session_stats_lock);
332 /*
333 * The FFP CmdSN window values will be allocated from the TPG's
334 * Initiator Node's ACL once the login has been successfully completed.
335 */
336 sess->max_cmd_sn = be32_to_cpu(pdu->cmdsn);
337
338 sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL);
339 if (!sess->sess_ops) {
340 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
341 ISCSI_LOGIN_STATUS_NO_RESOURCES);
342 pr_err("Unable to allocate memory for"
343 " struct iscsi_sess_ops.\n");
344 kfree(sess);
345 return -ENOMEM;
346 }
347
348 sess->se_sess = transport_init_session();
349 if (IS_ERR(sess->se_sess)) {
350 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
351 ISCSI_LOGIN_STATUS_NO_RESOURCES);
352 kfree(sess);
353 return -ENOMEM;
354 }
355
356 return 0;
357 }
358
359 static int iscsi_login_zero_tsih_s2(
360 struct iscsi_conn *conn)
361 {
362 struct iscsi_node_attrib *na;
363 struct iscsi_session *sess = conn->sess;
364 bool iser = false;
365
366 sess->tpg = conn->tpg;
367
368 /*
369 * Assign a new TPG Session Handle. Note this is protected with
370 * struct iscsi_portal_group->np_login_sem from iscsit_access_np().
371 */
372 sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;
373 if (!sess->tsih)
374 sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;
375
376 /*
377 * Create the default params from user defined values..
378 */
379 if (iscsi_copy_param_list(&conn->param_list,
380 ISCSI_TPG_C(conn)->param_list, 1) < 0) {
381 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
382 ISCSI_LOGIN_STATUS_NO_RESOURCES);
383 return -1;
384 }
385
386 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
387 iser = true;
388
389 iscsi_set_keys_to_negotiate(conn->param_list, iser);
390
391 if (sess->sess_ops->SessionType)
392 return iscsi_set_keys_irrelevant_for_discovery(
393 conn->param_list);
394
395 na = iscsit_tpg_get_node_attrib(sess);
396
397 /*
398 * Need to send TargetPortalGroupTag back in first login response
399 * on any iSCSI connection where the Initiator provides TargetName.
400 * See 5.3.1. Login Phase Start
401 *
402 * In our case, we have already located the struct iscsi_tiqn at this point.
403 */
404 if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt))
405 return -1;
406
407 /*
408 * Workaround for Initiators that have broken connection recovery logic.
409 *
410 * "We would really like to get rid of this." Linux-iSCSI.org team
411 */
412 if (iscsi_change_param_sprintf(conn, "ErrorRecoveryLevel=%d", na->default_erl))
413 return -1;
414
415 if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0)
416 return -1;
417 /*
418 * Set RDMAExtensions=Yes by default for iSER enabled network portals
419 */
420 if (iser) {
421 struct iscsi_param *param;
422 unsigned long mrdsl, off;
423 int rc;
424
425 if (iscsi_change_param_sprintf(conn, "RDMAExtensions=Yes"))
426 return -1;
427
428 /*
429 * Make MaxRecvDataSegmentLength PAGE_SIZE aligned for
430 * Immediate Data + Unsolicitied Data-OUT if necessary..
431 */
432 param = iscsi_find_param_from_key("MaxRecvDataSegmentLength",
433 conn->param_list);
434 if (!param) {
435 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
436 ISCSI_LOGIN_STATUS_NO_RESOURCES);
437 return -1;
438 }
439 rc = strict_strtoul(param->value, 0, &mrdsl);
440 if (rc < 0) {
441 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
442 ISCSI_LOGIN_STATUS_NO_RESOURCES);
443 return -1;
444 }
445 off = mrdsl % PAGE_SIZE;
446 if (!off)
447 return 0;
448
449 if (mrdsl < PAGE_SIZE)
450 mrdsl = PAGE_SIZE;
451 else
452 mrdsl -= off;
453
454 pr_warn("Aligning ISER MaxRecvDataSegmentLength: %lu down"
455 " to PAGE_SIZE\n", mrdsl);
456
457 if (iscsi_change_param_sprintf(conn, "MaxRecvDataSegmentLength=%lu\n", mrdsl))
458 return -1;
459 }
460
461 return 0;
462 }
463
464 /*
465 * Remove PSTATE_NEGOTIATE for the four FIM related keys.
466 * The Initiator node will be able to enable FIM by proposing them itself.
467 */
468 int iscsi_login_disable_FIM_keys(
469 struct iscsi_param_list *param_list,
470 struct iscsi_conn *conn)
471 {
472 struct iscsi_param *param;
473
474 param = iscsi_find_param_from_key("OFMarker", param_list);
475 if (!param) {
476 pr_err("iscsi_find_param_from_key() for"
477 " OFMarker failed\n");
478 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
479 ISCSI_LOGIN_STATUS_NO_RESOURCES);
480 return -1;
481 }
482 param->state &= ~PSTATE_NEGOTIATE;
483
484 param = iscsi_find_param_from_key("OFMarkInt", param_list);
485 if (!param) {
486 pr_err("iscsi_find_param_from_key() for"
487 " IFMarker failed\n");
488 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
489 ISCSI_LOGIN_STATUS_NO_RESOURCES);
490 return -1;
491 }
492 param->state &= ~PSTATE_NEGOTIATE;
493
494 param = iscsi_find_param_from_key("IFMarker", param_list);
495 if (!param) {
496 pr_err("iscsi_find_param_from_key() for"
497 " IFMarker failed\n");
498 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
499 ISCSI_LOGIN_STATUS_NO_RESOURCES);
500 return -1;
501 }
502 param->state &= ~PSTATE_NEGOTIATE;
503
504 param = iscsi_find_param_from_key("IFMarkInt", param_list);
505 if (!param) {
506 pr_err("iscsi_find_param_from_key() for"
507 " IFMarker failed\n");
508 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
509 ISCSI_LOGIN_STATUS_NO_RESOURCES);
510 return -1;
511 }
512 param->state &= ~PSTATE_NEGOTIATE;
513
514 return 0;
515 }
516
517 static int iscsi_login_non_zero_tsih_s1(
518 struct iscsi_conn *conn,
519 unsigned char *buf)
520 {
521 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
522
523 iscsi_login_set_conn_values(NULL, conn, pdu->cid);
524 return 0;
525 }
526
527 /*
528 * Add a new connection to an existing session.
529 */
530 static int iscsi_login_non_zero_tsih_s2(
531 struct iscsi_conn *conn,
532 unsigned char *buf)
533 {
534 struct iscsi_portal_group *tpg = conn->tpg;
535 struct iscsi_session *sess = NULL, *sess_p = NULL;
536 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
537 struct se_session *se_sess, *se_sess_tmp;
538 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
539 bool iser = false;
540
541 spin_lock_bh(&se_tpg->session_lock);
542 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
543 sess_list) {
544
545 sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr;
546 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
547 atomic_read(&sess_p->session_logout) ||
548 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED))
549 continue;
550 if (!memcmp(sess_p->isid, pdu->isid, 6) &&
551 (sess_p->tsih == be16_to_cpu(pdu->tsih))) {
552 iscsit_inc_session_usage_count(sess_p);
553 iscsit_stop_time2retain_timer(sess_p);
554 sess = sess_p;
555 break;
556 }
557 }
558 spin_unlock_bh(&se_tpg->session_lock);
559
560 /*
561 * If the Time2Retain handler has expired, the session is already gone.
562 */
563 if (!sess) {
564 pr_err("Initiator attempting to add a connection to"
565 " a non-existent session, rejecting iSCSI Login.\n");
566 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
567 ISCSI_LOGIN_STATUS_NO_SESSION);
568 return -1;
569 }
570
571 /*
572 * Stop the Time2Retain timer if this is a failed session, we restart
573 * the timer if the login is not successful.
574 */
575 spin_lock_bh(&sess->conn_lock);
576 if (sess->session_state == TARG_SESS_STATE_FAILED)
577 atomic_set(&sess->session_continuation, 1);
578 spin_unlock_bh(&sess->conn_lock);
579
580 iscsi_login_set_conn_values(sess, conn, pdu->cid);
581
582 if (iscsi_copy_param_list(&conn->param_list,
583 ISCSI_TPG_C(conn)->param_list, 0) < 0) {
584 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
585 ISCSI_LOGIN_STATUS_NO_RESOURCES);
586 return -1;
587 }
588
589 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
590 iser = true;
591
592 iscsi_set_keys_to_negotiate(conn->param_list, iser);
593 /*
594 * Need to send TargetPortalGroupTag back in first login response
595 * on any iSCSI connection where the Initiator provides TargetName.
596 * See 5.3.1. Login Phase Start
597 *
598 * In our case, we have already located the struct iscsi_tiqn at this point.
599 */
600 if (iscsi_change_param_sprintf(conn, "TargetPortalGroupTag=%hu", sess->tpg->tpgt))
601 return -1;
602
603 return iscsi_login_disable_FIM_keys(conn->param_list, conn);
604 }
605
606 int iscsi_login_post_auth_non_zero_tsih(
607 struct iscsi_conn *conn,
608 u16 cid,
609 u32 exp_statsn)
610 {
611 struct iscsi_conn *conn_ptr = NULL;
612 struct iscsi_conn_recovery *cr = NULL;
613 struct iscsi_session *sess = conn->sess;
614
615 /*
616 * By following item 5 in the login table, if we have found
617 * an existing ISID and a valid/existing TSIH and an existing
618 * CID we do connection reinstatement. Currently we dont not
619 * support it so we send back an non-zero status class to the
620 * initiator and release the new connection.
621 */
622 conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid);
623 if (conn_ptr) {
624 pr_err("Connection exists with CID %hu for %s,"
625 " performing connection reinstatement.\n",
626 conn_ptr->cid, sess->sess_ops->InitiatorName);
627
628 iscsit_connection_reinstatement_rcfr(conn_ptr);
629 iscsit_dec_conn_usage_count(conn_ptr);
630 }
631
632 /*
633 * Check for any connection recovery entires containing CID.
634 * We use the original ExpStatSN sent in the first login request
635 * to acknowledge commands for the failed connection.
636 *
637 * Also note that an explict logout may have already been sent,
638 * but the response may not be sent due to additional connection
639 * loss.
640 */
641 if (sess->sess_ops->ErrorRecoveryLevel == 2) {
642 cr = iscsit_get_inactive_connection_recovery_entry(
643 sess, cid);
644 if (cr) {
645 pr_debug("Performing implicit logout"
646 " for connection recovery on CID: %hu\n",
647 conn->cid);
648 iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn);
649 }
650 }
651
652 /*
653 * Else we follow item 4 from the login table in that we have
654 * found an existing ISID and a valid/existing TSIH and a new
655 * CID we go ahead and continue to add a new connection to the
656 * session.
657 */
658 pr_debug("Adding CID %hu to existing session for %s.\n",
659 cid, sess->sess_ops->InitiatorName);
660
661 if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) {
662 pr_err("Adding additional connection to this session"
663 " would exceed MaxConnections %d, login failed.\n",
664 sess->sess_ops->MaxConnections);
665 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
666 ISCSI_LOGIN_STATUS_ISID_ERROR);
667 return -1;
668 }
669
670 return 0;
671 }
672
673 static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
674 {
675 struct iscsi_session *sess = conn->sess;
676 /*
677 * FIXME: Unsolicitied NopIN support for ISER
678 */
679 if (conn->conn_transport->transport_type == ISCSI_INFINIBAND)
680 return;
681
682 if (!sess->sess_ops->SessionType)
683 iscsit_start_nopin_timer(conn);
684 }
685
686 static int iscsi_post_login_handler(
687 struct iscsi_np *np,
688 struct iscsi_conn *conn,
689 u8 zero_tsih)
690 {
691 int stop_timer = 0;
692 struct iscsi_session *sess = conn->sess;
693 struct se_session *se_sess = sess->se_sess;
694 struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess);
695 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
696 struct iscsi_thread_set *ts;
697
698 iscsit_inc_conn_usage_count(conn);
699
700 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS,
701 ISCSI_LOGIN_STATUS_ACCEPT);
702
703 pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n");
704 conn->conn_state = TARG_CONN_STATE_LOGGED_IN;
705
706 iscsi_set_connection_parameters(conn->conn_ops, conn->param_list);
707 iscsit_set_sync_and_steering_values(conn);
708 /*
709 * SCSI Initiator -> SCSI Target Port Mapping
710 */
711 ts = iscsi_get_thread_set();
712 if (!zero_tsih) {
713 iscsi_set_session_parameters(sess->sess_ops,
714 conn->param_list, 0);
715 iscsi_release_param_list(conn->param_list);
716 conn->param_list = NULL;
717
718 spin_lock_bh(&sess->conn_lock);
719 atomic_set(&sess->session_continuation, 0);
720 if (sess->session_state == TARG_SESS_STATE_FAILED) {
721 pr_debug("Moving to"
722 " TARG_SESS_STATE_LOGGED_IN.\n");
723 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
724 stop_timer = 1;
725 }
726
727 pr_debug("iSCSI Login successful on CID: %hu from %s to"
728 " %s:%hu,%hu\n", conn->cid, conn->login_ip,
729 conn->local_ip, conn->local_port, tpg->tpgt);
730
731 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
732 atomic_inc(&sess->nconn);
733 pr_debug("Incremented iSCSI Connection count to %hu"
734 " from node: %s\n", atomic_read(&sess->nconn),
735 sess->sess_ops->InitiatorName);
736 spin_unlock_bh(&sess->conn_lock);
737
738 iscsi_post_login_start_timers(conn);
739
740 iscsi_activate_thread_set(conn, ts);
741 /*
742 * Determine CPU mask to ensure connection's RX and TX kthreads
743 * are scheduled on the same CPU.
744 */
745 iscsit_thread_get_cpumask(conn);
746 conn->conn_rx_reset_cpumask = 1;
747 conn->conn_tx_reset_cpumask = 1;
748
749 iscsit_dec_conn_usage_count(conn);
750 if (stop_timer) {
751 spin_lock_bh(&se_tpg->session_lock);
752 iscsit_stop_time2retain_timer(sess);
753 spin_unlock_bh(&se_tpg->session_lock);
754 }
755 iscsit_dec_session_usage_count(sess);
756 return 0;
757 }
758
759 iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1);
760 iscsi_release_param_list(conn->param_list);
761 conn->param_list = NULL;
762
763 iscsit_determine_maxcmdsn(sess);
764
765 spin_lock_bh(&se_tpg->session_lock);
766 __transport_register_session(&sess->tpg->tpg_se_tpg,
767 se_sess->se_node_acl, se_sess, sess);
768 pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n");
769 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
770
771 pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n",
772 conn->cid, conn->login_ip, conn->local_ip, conn->local_port,
773 tpg->tpgt);
774
775 spin_lock_bh(&sess->conn_lock);
776 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
777 atomic_inc(&sess->nconn);
778 pr_debug("Incremented iSCSI Connection count to %hu from node:"
779 " %s\n", atomic_read(&sess->nconn),
780 sess->sess_ops->InitiatorName);
781 spin_unlock_bh(&sess->conn_lock);
782
783 sess->sid = tpg->sid++;
784 if (!sess->sid)
785 sess->sid = tpg->sid++;
786 pr_debug("Established iSCSI session from node: %s\n",
787 sess->sess_ops->InitiatorName);
788
789 tpg->nsessions++;
790 if (tpg->tpg_tiqn)
791 tpg->tpg_tiqn->tiqn_nsessions++;
792
793 pr_debug("Incremented number of active iSCSI sessions to %u on"
794 " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt);
795 spin_unlock_bh(&se_tpg->session_lock);
796
797 iscsi_post_login_start_timers(conn);
798 iscsi_activate_thread_set(conn, ts);
799 /*
800 * Determine CPU mask to ensure connection's RX and TX kthreads
801 * are scheduled on the same CPU.
802 */
803 iscsit_thread_get_cpumask(conn);
804 conn->conn_rx_reset_cpumask = 1;
805 conn->conn_tx_reset_cpumask = 1;
806
807 iscsit_dec_conn_usage_count(conn);
808
809 return 0;
810 }
811
812 static void iscsi_handle_login_thread_timeout(unsigned long data)
813 {
814 struct iscsi_np *np = (struct iscsi_np *) data;
815
816 spin_lock_bh(&np->np_thread_lock);
817 pr_err("iSCSI Login timeout on Network Portal %s:%hu\n",
818 np->np_ip, np->np_port);
819
820 if (np->np_login_timer_flags & ISCSI_TF_STOP) {
821 spin_unlock_bh(&np->np_thread_lock);
822 return;
823 }
824
825 if (np->np_thread)
826 send_sig(SIGINT, np->np_thread, 1);
827
828 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
829 spin_unlock_bh(&np->np_thread_lock);
830 }
831
832 static void iscsi_start_login_thread_timer(struct iscsi_np *np)
833 {
834 /*
835 * This used the TA_LOGIN_TIMEOUT constant because at this
836 * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout
837 */
838 spin_lock_bh(&np->np_thread_lock);
839 init_timer(&np->np_login_timer);
840 np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
841 np->np_login_timer.data = (unsigned long)np;
842 np->np_login_timer.function = iscsi_handle_login_thread_timeout;
843 np->np_login_timer_flags &= ~ISCSI_TF_STOP;
844 np->np_login_timer_flags |= ISCSI_TF_RUNNING;
845 add_timer(&np->np_login_timer);
846
847 pr_debug("Added timeout timer to iSCSI login request for"
848 " %u seconds.\n", TA_LOGIN_TIMEOUT);
849 spin_unlock_bh(&np->np_thread_lock);
850 }
851
852 static void iscsi_stop_login_thread_timer(struct iscsi_np *np)
853 {
854 spin_lock_bh(&np->np_thread_lock);
855 if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) {
856 spin_unlock_bh(&np->np_thread_lock);
857 return;
858 }
859 np->np_login_timer_flags |= ISCSI_TF_STOP;
860 spin_unlock_bh(&np->np_thread_lock);
861
862 del_timer_sync(&np->np_login_timer);
863
864 spin_lock_bh(&np->np_thread_lock);
865 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
866 spin_unlock_bh(&np->np_thread_lock);
867 }
868
869 int iscsit_setup_np(
870 struct iscsi_np *np,
871 struct __kernel_sockaddr_storage *sockaddr)
872 {
873 struct socket *sock = NULL;
874 int backlog = 5, ret, opt = 0, len;
875
876 switch (np->np_network_transport) {
877 case ISCSI_TCP:
878 np->np_ip_proto = IPPROTO_TCP;
879 np->np_sock_type = SOCK_STREAM;
880 break;
881 case ISCSI_SCTP_TCP:
882 np->np_ip_proto = IPPROTO_SCTP;
883 np->np_sock_type = SOCK_STREAM;
884 break;
885 case ISCSI_SCTP_UDP:
886 np->np_ip_proto = IPPROTO_SCTP;
887 np->np_sock_type = SOCK_SEQPACKET;
888 break;
889 default:
890 pr_err("Unsupported network_transport: %d\n",
891 np->np_network_transport);
892 return -EINVAL;
893 }
894
895 np->np_ip_proto = IPPROTO_TCP;
896 np->np_sock_type = SOCK_STREAM;
897
898 ret = sock_create(sockaddr->ss_family, np->np_sock_type,
899 np->np_ip_proto, &sock);
900 if (ret < 0) {
901 pr_err("sock_create() failed.\n");
902 return ret;
903 }
904 np->np_socket = sock;
905 /*
906 * Setup the np->np_sockaddr from the passed sockaddr setup
907 * in iscsi_target_configfs.c code..
908 */
909 memcpy(&np->np_sockaddr, sockaddr,
910 sizeof(struct __kernel_sockaddr_storage));
911
912 if (sockaddr->ss_family == AF_INET6)
913 len = sizeof(struct sockaddr_in6);
914 else
915 len = sizeof(struct sockaddr_in);
916 /*
917 * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY.
918 */
919 /* FIXME: Someone please explain why this is endian-safe */
920 opt = 1;
921 if (np->np_network_transport == ISCSI_TCP) {
922 ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
923 (char *)&opt, sizeof(opt));
924 if (ret < 0) {
925 pr_err("kernel_setsockopt() for TCP_NODELAY"
926 " failed: %d\n", ret);
927 goto fail;
928 }
929 }
930
931 /* FIXME: Someone please explain why this is endian-safe */
932 ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
933 (char *)&opt, sizeof(opt));
934 if (ret < 0) {
935 pr_err("kernel_setsockopt() for SO_REUSEADDR"
936 " failed\n");
937 goto fail;
938 }
939
940 ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND,
941 (char *)&opt, sizeof(opt));
942 if (ret < 0) {
943 pr_err("kernel_setsockopt() for IP_FREEBIND"
944 " failed\n");
945 goto fail;
946 }
947
948 ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len);
949 if (ret < 0) {
950 pr_err("kernel_bind() failed: %d\n", ret);
951 goto fail;
952 }
953
954 ret = kernel_listen(sock, backlog);
955 if (ret != 0) {
956 pr_err("kernel_listen() failed: %d\n", ret);
957 goto fail;
958 }
959
960 return 0;
961 fail:
962 np->np_socket = NULL;
963 if (sock)
964 sock_release(sock);
965 return ret;
966 }
967
968 int iscsi_target_setup_login_socket(
969 struct iscsi_np *np,
970 struct __kernel_sockaddr_storage *sockaddr)
971 {
972 struct iscsit_transport *t;
973 int rc;
974
975 t = iscsit_get_transport(np->np_network_transport);
976 if (!t)
977 return -EINVAL;
978
979 rc = t->iscsit_setup_np(np, sockaddr);
980 if (rc < 0) {
981 iscsit_put_transport(t);
982 return rc;
983 }
984
985 np->np_transport = t;
986 np->enabled = true;
987 return 0;
988 }
989
990 int iscsit_accept_np(struct iscsi_np *np, struct iscsi_conn *conn)
991 {
992 struct socket *new_sock, *sock = np->np_socket;
993 struct sockaddr_in sock_in;
994 struct sockaddr_in6 sock_in6;
995 int rc, err;
996
997 rc = kernel_accept(sock, &new_sock, 0);
998 if (rc < 0)
999 return rc;
1000
1001 conn->sock = new_sock;
1002 conn->login_family = np->np_sockaddr.ss_family;
1003
1004 if (np->np_sockaddr.ss_family == AF_INET6) {
1005 memset(&sock_in6, 0, sizeof(struct sockaddr_in6));
1006
1007 rc = conn->sock->ops->getname(conn->sock,
1008 (struct sockaddr *)&sock_in6, &err, 1);
1009 if (!rc) {
1010 snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c",
1011 &sock_in6.sin6_addr.in6_u);
1012 conn->login_port = ntohs(sock_in6.sin6_port);
1013 }
1014
1015 rc = conn->sock->ops->getname(conn->sock,
1016 (struct sockaddr *)&sock_in6, &err, 0);
1017 if (!rc) {
1018 snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c",
1019 &sock_in6.sin6_addr.in6_u);
1020 conn->local_port = ntohs(sock_in6.sin6_port);
1021 }
1022 } else {
1023 memset(&sock_in, 0, sizeof(struct sockaddr_in));
1024
1025 rc = conn->sock->ops->getname(conn->sock,
1026 (struct sockaddr *)&sock_in, &err, 1);
1027 if (!rc) {
1028 sprintf(conn->login_ip, "%pI4",
1029 &sock_in.sin_addr.s_addr);
1030 conn->login_port = ntohs(sock_in.sin_port);
1031 }
1032
1033 rc = conn->sock->ops->getname(conn->sock,
1034 (struct sockaddr *)&sock_in, &err, 0);
1035 if (!rc) {
1036 sprintf(conn->local_ip, "%pI4",
1037 &sock_in.sin_addr.s_addr);
1038 conn->local_port = ntohs(sock_in.sin_port);
1039 }
1040 }
1041
1042 return 0;
1043 }
1044
1045 int iscsit_get_login_rx(struct iscsi_conn *conn, struct iscsi_login *login)
1046 {
1047 struct iscsi_login_req *login_req;
1048 u32 padding = 0, payload_length;
1049
1050 if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0)
1051 return -1;
1052
1053 login_req = (struct iscsi_login_req *)login->req;
1054 payload_length = ntoh24(login_req->dlength);
1055 padding = ((-payload_length) & 3);
1056
1057 pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
1058 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n",
1059 login_req->flags, login_req->itt, login_req->cmdsn,
1060 login_req->exp_statsn, login_req->cid, payload_length);
1061 /*
1062 * Setup the initial iscsi_login values from the leading
1063 * login request PDU.
1064 */
1065 if (login->first_request) {
1066 login_req = (struct iscsi_login_req *)login->req;
1067 login->leading_connection = (!login_req->tsih) ? 1 : 0;
1068 login->current_stage = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags);
1069 login->version_min = login_req->min_version;
1070 login->version_max = login_req->max_version;
1071 memcpy(login->isid, login_req->isid, 6);
1072 login->cmd_sn = be32_to_cpu(login_req->cmdsn);
1073 login->init_task_tag = login_req->itt;
1074 login->initial_exp_statsn = be32_to_cpu(login_req->exp_statsn);
1075 login->cid = be16_to_cpu(login_req->cid);
1076 login->tsih = be16_to_cpu(login_req->tsih);
1077 }
1078
1079 if (iscsi_target_check_login_request(conn, login) < 0)
1080 return -1;
1081
1082 memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS);
1083 if (iscsi_login_rx_data(conn, login->req_buf,
1084 payload_length + padding) < 0)
1085 return -1;
1086
1087 return 0;
1088 }
1089
1090 int iscsit_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
1091 u32 length)
1092 {
1093 if (iscsi_login_tx_data(conn, login->rsp, login->rsp_buf, length) < 0)
1094 return -1;
1095
1096 return 0;
1097 }
1098
1099 static int
1100 iscsit_conn_set_transport(struct iscsi_conn *conn, struct iscsit_transport *t)
1101 {
1102 int rc;
1103
1104 if (!t->owner) {
1105 conn->conn_transport = t;
1106 return 0;
1107 }
1108
1109 rc = try_module_get(t->owner);
1110 if (!rc) {
1111 pr_err("try_module_get() failed for %s\n", t->name);
1112 return -EINVAL;
1113 }
1114
1115 conn->conn_transport = t;
1116 return 0;
1117 }
1118
1119 static int __iscsi_target_login_thread(struct iscsi_np *np)
1120 {
1121 u8 *buffer, zero_tsih = 0;
1122 int ret = 0, rc, stop;
1123 struct iscsi_conn *conn = NULL;
1124 struct iscsi_login *login;
1125 struct iscsi_portal_group *tpg = NULL;
1126 struct iscsi_login_req *pdu;
1127
1128 flush_signals(current);
1129
1130 spin_lock_bh(&np->np_thread_lock);
1131 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
1132 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
1133 complete(&np->np_restart_comp);
1134 } else {
1135 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
1136 }
1137 spin_unlock_bh(&np->np_thread_lock);
1138
1139 conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
1140 if (!conn) {
1141 pr_err("Could not allocate memory for"
1142 " new connection\n");
1143 /* Get another socket */
1144 return 1;
1145 }
1146 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
1147 conn->conn_state = TARG_CONN_STATE_FREE;
1148
1149 if (iscsit_conn_set_transport(conn, np->np_transport) < 0) {
1150 kfree(conn);
1151 return 1;
1152 }
1153
1154 rc = np->np_transport->iscsit_accept_np(np, conn);
1155 if (rc == -ENOSYS) {
1156 complete(&np->np_restart_comp);
1157 iscsit_put_transport(conn->conn_transport);
1158 kfree(conn);
1159 conn = NULL;
1160 goto exit;
1161 } else if (rc < 0) {
1162 spin_lock_bh(&np->np_thread_lock);
1163 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
1164 spin_unlock_bh(&np->np_thread_lock);
1165 complete(&np->np_restart_comp);
1166 iscsit_put_transport(conn->conn_transport);
1167 kfree(conn);
1168 conn = NULL;
1169 if (ret == -ENODEV)
1170 goto out;
1171 /* Get another socket */
1172 return 1;
1173 }
1174 spin_unlock_bh(&np->np_thread_lock);
1175 iscsit_put_transport(conn->conn_transport);
1176 kfree(conn);
1177 conn = NULL;
1178 goto out;
1179 }
1180 /*
1181 * Perform the remaining iSCSI connection initialization items..
1182 */
1183 login = iscsi_login_init_conn(conn);
1184 if (!login) {
1185 goto new_sess_out;
1186 }
1187
1188 iscsi_start_login_thread_timer(np);
1189
1190 pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
1191 conn->conn_state = TARG_CONN_STATE_XPT_UP;
1192 /*
1193 * This will process the first login request + payload..
1194 */
1195 rc = np->np_transport->iscsit_get_login_rx(conn, login);
1196 if (rc == 1)
1197 return 1;
1198 else if (rc < 0)
1199 goto new_sess_out;
1200
1201 buffer = &login->req[0];
1202 pdu = (struct iscsi_login_req *)buffer;
1203 /*
1204 * Used by iscsit_tx_login_rsp() for Login Resonses PDUs
1205 * when Status-Class != 0.
1206 */
1207 conn->login_itt = pdu->itt;
1208
1209 spin_lock_bh(&np->np_thread_lock);
1210 if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
1211 spin_unlock_bh(&np->np_thread_lock);
1212 pr_err("iSCSI Network Portal on %s:%hu currently not"
1213 " active.\n", np->np_ip, np->np_port);
1214 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1215 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1216 goto new_sess_out;
1217 }
1218 spin_unlock_bh(&np->np_thread_lock);
1219
1220 conn->network_transport = np->np_network_transport;
1221
1222 pr_debug("Received iSCSI login request from %s on %s Network"
1223 " Portal %s:%hu\n", conn->login_ip, np->np_transport->name,
1224 conn->local_ip, conn->local_port);
1225
1226 pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
1227 conn->conn_state = TARG_CONN_STATE_IN_LOGIN;
1228
1229 if (iscsi_login_check_initiator_version(conn, pdu->max_version,
1230 pdu->min_version) < 0)
1231 goto new_sess_out;
1232
1233 zero_tsih = (pdu->tsih == 0x0000);
1234 if (zero_tsih) {
1235 /*
1236 * This is the leading connection of a new session.
1237 * We wait until after authentication to check for
1238 * session reinstatement.
1239 */
1240 if (iscsi_login_zero_tsih_s1(conn, buffer) < 0)
1241 goto new_sess_out;
1242 } else {
1243 /*
1244 * Add a new connection to an existing session.
1245 * We check for a non-existant session in
1246 * iscsi_login_non_zero_tsih_s2() below based
1247 * on ISID/TSIH, but wait until after authentication
1248 * to check for connection reinstatement, etc.
1249 */
1250 if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0)
1251 goto new_sess_out;
1252 }
1253 /*
1254 * SessionType: Discovery
1255 *
1256 * Locates Default Portal
1257 *
1258 * SessionType: Normal
1259 *
1260 * Locates Target Portal from NP -> Target IQN
1261 */
1262 rc = iscsi_target_locate_portal(np, conn, login);
1263 if (rc < 0) {
1264 tpg = conn->tpg;
1265 goto new_sess_out;
1266 }
1267
1268 tpg = conn->tpg;
1269 if (!tpg) {
1270 pr_err("Unable to locate struct iscsi_conn->tpg\n");
1271 goto new_sess_out;
1272 }
1273
1274 if (zero_tsih) {
1275 if (iscsi_login_zero_tsih_s2(conn) < 0)
1276 goto new_sess_out;
1277 } else {
1278 if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0)
1279 goto old_sess_out;
1280 }
1281
1282 if (iscsi_target_start_negotiation(login, conn) < 0)
1283 goto new_sess_out;
1284
1285 if (!conn->sess) {
1286 pr_err("struct iscsi_conn session pointer is NULL!\n");
1287 goto new_sess_out;
1288 }
1289
1290 iscsi_stop_login_thread_timer(np);
1291
1292 if (signal_pending(current))
1293 goto new_sess_out;
1294
1295 ret = iscsi_post_login_handler(np, conn, zero_tsih);
1296
1297 if (ret < 0)
1298 goto new_sess_out;
1299
1300 iscsit_deaccess_np(np, tpg);
1301 tpg = NULL;
1302 /* Get another socket */
1303 return 1;
1304
1305 new_sess_out:
1306 pr_err("iSCSI Login negotiation failed.\n");
1307 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1308 ISCSI_LOGIN_STATUS_INIT_ERR);
1309 if (!zero_tsih || !conn->sess)
1310 goto old_sess_out;
1311 if (conn->sess->se_sess)
1312 transport_free_session(conn->sess->se_sess);
1313 if (conn->sess->session_index != 0) {
1314 spin_lock_bh(&sess_idr_lock);
1315 idr_remove(&sess_idr, conn->sess->session_index);
1316 spin_unlock_bh(&sess_idr_lock);
1317 }
1318 kfree(conn->sess->sess_ops);
1319 kfree(conn->sess);
1320 old_sess_out:
1321 iscsi_stop_login_thread_timer(np);
1322 /*
1323 * If login negotiation fails check if the Time2Retain timer
1324 * needs to be restarted.
1325 */
1326 if (!zero_tsih && conn->sess) {
1327 spin_lock_bh(&conn->sess->conn_lock);
1328 if (conn->sess->session_state == TARG_SESS_STATE_FAILED) {
1329 struct se_portal_group *se_tpg =
1330 &ISCSI_TPG_C(conn)->tpg_se_tpg;
1331
1332 atomic_set(&conn->sess->session_continuation, 0);
1333 spin_unlock_bh(&conn->sess->conn_lock);
1334 spin_lock_bh(&se_tpg->session_lock);
1335 iscsit_start_time2retain_handler(conn->sess);
1336 spin_unlock_bh(&se_tpg->session_lock);
1337 } else
1338 spin_unlock_bh(&conn->sess->conn_lock);
1339 iscsit_dec_session_usage_count(conn->sess);
1340 }
1341
1342 if (!IS_ERR(conn->conn_rx_hash.tfm))
1343 crypto_free_hash(conn->conn_rx_hash.tfm);
1344 if (!IS_ERR(conn->conn_tx_hash.tfm))
1345 crypto_free_hash(conn->conn_tx_hash.tfm);
1346
1347 if (conn->conn_cpumask)
1348 free_cpumask_var(conn->conn_cpumask);
1349
1350 kfree(conn->conn_ops);
1351
1352 if (conn->param_list) {
1353 iscsi_release_param_list(conn->param_list);
1354 conn->param_list = NULL;
1355 }
1356 iscsi_target_nego_release(conn);
1357
1358 if (conn->sock) {
1359 sock_release(conn->sock);
1360 conn->sock = NULL;
1361 }
1362
1363 if (conn->conn_transport->iscsit_free_conn)
1364 conn->conn_transport->iscsit_free_conn(conn);
1365
1366 iscsit_put_transport(conn->conn_transport);
1367
1368 kfree(conn);
1369
1370 if (tpg) {
1371 iscsit_deaccess_np(np, tpg);
1372 tpg = NULL;
1373 }
1374
1375 out:
1376 stop = kthread_should_stop();
1377 if (!stop && signal_pending(current)) {
1378 spin_lock_bh(&np->np_thread_lock);
1379 stop = (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN);
1380 spin_unlock_bh(&np->np_thread_lock);
1381 }
1382 /* Wait for another socket.. */
1383 if (!stop)
1384 return 1;
1385 exit:
1386 iscsi_stop_login_thread_timer(np);
1387 spin_lock_bh(&np->np_thread_lock);
1388 np->np_thread_state = ISCSI_NP_THREAD_EXIT;
1389 np->np_thread = NULL;
1390 spin_unlock_bh(&np->np_thread_lock);
1391
1392 return 0;
1393 }
1394
1395 int iscsi_target_login_thread(void *arg)
1396 {
1397 struct iscsi_np *np = arg;
1398 int ret;
1399
1400 allow_signal(SIGINT);
1401
1402 while (!kthread_should_stop()) {
1403 ret = __iscsi_target_login_thread(np);
1404 /*
1405 * We break and exit here unless another sock_accept() call
1406 * is expected.
1407 */
1408 if (ret != 1)
1409 break;
1410 }
1411
1412 return 0;
1413 }
Linux with added FPC-III support