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Merge branch 'picoxcell/timer' into next/timer
[deliverable/linux.git] / drivers / target / iscsi / iscsi_target_login.c
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 extern struct idr sess_idr;
43 extern struct mutex auth_id_lock;
44 extern spinlock_t sess_idr_lock;
45
46 static int iscsi_login_init_conn(struct iscsi_conn *conn)
47 {
48 INIT_LIST_HEAD(&conn->conn_list);
49 INIT_LIST_HEAD(&conn->conn_cmd_list);
50 INIT_LIST_HEAD(&conn->immed_queue_list);
51 INIT_LIST_HEAD(&conn->response_queue_list);
52 init_completion(&conn->conn_post_wait_comp);
53 init_completion(&conn->conn_wait_comp);
54 init_completion(&conn->conn_wait_rcfr_comp);
55 init_completion(&conn->conn_waiting_on_uc_comp);
56 init_completion(&conn->conn_logout_comp);
57 init_completion(&conn->rx_half_close_comp);
58 init_completion(&conn->tx_half_close_comp);
59 spin_lock_init(&conn->cmd_lock);
60 spin_lock_init(&conn->conn_usage_lock);
61 spin_lock_init(&conn->immed_queue_lock);
62 spin_lock_init(&conn->nopin_timer_lock);
63 spin_lock_init(&conn->response_queue_lock);
64 spin_lock_init(&conn->state_lock);
65
66 if (!zalloc_cpumask_var(&conn->conn_cpumask, GFP_KERNEL)) {
67 pr_err("Unable to allocate conn->conn_cpumask\n");
68 return -ENOMEM;
69 }
70
71 return 0;
72 }
73
74 /*
75 * Used by iscsi_target_nego.c:iscsi_target_locate_portal() to setup
76 * per struct iscsi_conn libcrypto contexts for crc32c and crc32-intel
77 */
78 int iscsi_login_setup_crypto(struct iscsi_conn *conn)
79 {
80 /*
81 * Setup slicing by CRC32C algorithm for RX and TX libcrypto contexts
82 * which will default to crc32c_intel.ko for cpu_has_xmm4_2, or fallback
83 * to software 1x8 byte slicing from crc32c.ko
84 */
85 conn->conn_rx_hash.flags = 0;
86 conn->conn_rx_hash.tfm = crypto_alloc_hash("crc32c", 0,
87 CRYPTO_ALG_ASYNC);
88 if (IS_ERR(conn->conn_rx_hash.tfm)) {
89 pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
90 return -ENOMEM;
91 }
92
93 conn->conn_tx_hash.flags = 0;
94 conn->conn_tx_hash.tfm = crypto_alloc_hash("crc32c", 0,
95 CRYPTO_ALG_ASYNC);
96 if (IS_ERR(conn->conn_tx_hash.tfm)) {
97 pr_err("crypto_alloc_hash() failed for conn_tx_tfm\n");
98 crypto_free_hash(conn->conn_rx_hash.tfm);
99 return -ENOMEM;
100 }
101
102 return 0;
103 }
104
105 static int iscsi_login_check_initiator_version(
106 struct iscsi_conn *conn,
107 u8 version_max,
108 u8 version_min)
109 {
110 if ((version_max != 0x00) || (version_min != 0x00)) {
111 pr_err("Unsupported iSCSI IETF Pre-RFC Revision,"
112 " version Min/Max 0x%02x/0x%02x, rejecting login.\n",
113 version_min, version_max);
114 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
115 ISCSI_LOGIN_STATUS_NO_VERSION);
116 return -1;
117 }
118
119 return 0;
120 }
121
122 int iscsi_check_for_session_reinstatement(struct iscsi_conn *conn)
123 {
124 int sessiontype;
125 struct iscsi_param *initiatorname_param = NULL, *sessiontype_param = NULL;
126 struct iscsi_portal_group *tpg = conn->tpg;
127 struct iscsi_session *sess = NULL, *sess_p = NULL;
128 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
129 struct se_session *se_sess, *se_sess_tmp;
130
131 initiatorname_param = iscsi_find_param_from_key(
132 INITIATORNAME, conn->param_list);
133 if (!initiatorname_param)
134 return -1;
135
136 sessiontype_param = iscsi_find_param_from_key(
137 SESSIONTYPE, conn->param_list);
138 if (!sessiontype_param)
139 return -1;
140
141 sessiontype = (strncmp(sessiontype_param->value, NORMAL, 6)) ? 1 : 0;
142
143 spin_lock_bh(&se_tpg->session_lock);
144 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
145 sess_list) {
146
147 sess_p = se_sess->fabric_sess_ptr;
148 spin_lock(&sess_p->conn_lock);
149 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
150 atomic_read(&sess_p->session_logout) ||
151 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED)) {
152 spin_unlock(&sess_p->conn_lock);
153 continue;
154 }
155 if (!memcmp(sess_p->isid, conn->sess->isid, 6) &&
156 (!strcmp(sess_p->sess_ops->InitiatorName,
157 initiatorname_param->value) &&
158 (sess_p->sess_ops->SessionType == sessiontype))) {
159 atomic_set(&sess_p->session_reinstatement, 1);
160 spin_unlock(&sess_p->conn_lock);
161 iscsit_inc_session_usage_count(sess_p);
162 iscsit_stop_time2retain_timer(sess_p);
163 sess = sess_p;
164 break;
165 }
166 spin_unlock(&sess_p->conn_lock);
167 }
168 spin_unlock_bh(&se_tpg->session_lock);
169 /*
170 * If the Time2Retain handler has expired, the session is already gone.
171 */
172 if (!sess)
173 return 0;
174
175 pr_debug("%s iSCSI Session SID %u is still active for %s,"
176 " preforming session reinstatement.\n", (sessiontype) ?
177 "Discovery" : "Normal", sess->sid,
178 sess->sess_ops->InitiatorName);
179
180 spin_lock_bh(&sess->conn_lock);
181 if (sess->session_state == TARG_SESS_STATE_FAILED) {
182 spin_unlock_bh(&sess->conn_lock);
183 iscsit_dec_session_usage_count(sess);
184 target_put_session(sess->se_sess);
185 return 0;
186 }
187 spin_unlock_bh(&sess->conn_lock);
188
189 iscsit_stop_session(sess, 1, 1);
190 iscsit_dec_session_usage_count(sess);
191
192 target_put_session(sess->se_sess);
193 return 0;
194 }
195
196 static void iscsi_login_set_conn_values(
197 struct iscsi_session *sess,
198 struct iscsi_conn *conn,
199 u16 cid)
200 {
201 conn->sess = sess;
202 conn->cid = cid;
203 /*
204 * Generate a random Status sequence number (statsn) for the new
205 * iSCSI connection.
206 */
207 get_random_bytes(&conn->stat_sn, sizeof(u32));
208
209 mutex_lock(&auth_id_lock);
210 conn->auth_id = iscsit_global->auth_id++;
211 mutex_unlock(&auth_id_lock);
212 }
213
214 /*
215 * This is the leading connection of a new session,
216 * or session reinstatement.
217 */
218 static int iscsi_login_zero_tsih_s1(
219 struct iscsi_conn *conn,
220 unsigned char *buf)
221 {
222 struct iscsi_session *sess = NULL;
223 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
224
225 sess = kzalloc(sizeof(struct iscsi_session), GFP_KERNEL);
226 if (!sess) {
227 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
228 ISCSI_LOGIN_STATUS_NO_RESOURCES);
229 pr_err("Could not allocate memory for session\n");
230 return -ENOMEM;
231 }
232
233 iscsi_login_set_conn_values(sess, conn, pdu->cid);
234 sess->init_task_tag = pdu->itt;
235 memcpy(&sess->isid, pdu->isid, 6);
236 sess->exp_cmd_sn = pdu->cmdsn;
237 INIT_LIST_HEAD(&sess->sess_conn_list);
238 INIT_LIST_HEAD(&sess->sess_ooo_cmdsn_list);
239 INIT_LIST_HEAD(&sess->cr_active_list);
240 INIT_LIST_HEAD(&sess->cr_inactive_list);
241 init_completion(&sess->async_msg_comp);
242 init_completion(&sess->reinstatement_comp);
243 init_completion(&sess->session_wait_comp);
244 init_completion(&sess->session_waiting_on_uc_comp);
245 mutex_init(&sess->cmdsn_mutex);
246 spin_lock_init(&sess->conn_lock);
247 spin_lock_init(&sess->cr_a_lock);
248 spin_lock_init(&sess->cr_i_lock);
249 spin_lock_init(&sess->session_usage_lock);
250 spin_lock_init(&sess->ttt_lock);
251
252 if (!idr_pre_get(&sess_idr, GFP_KERNEL)) {
253 pr_err("idr_pre_get() for sess_idr failed\n");
254 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
255 ISCSI_LOGIN_STATUS_NO_RESOURCES);
256 kfree(sess);
257 return -ENOMEM;
258 }
259 spin_lock(&sess_idr_lock);
260 idr_get_new(&sess_idr, NULL, &sess->session_index);
261 spin_unlock(&sess_idr_lock);
262
263 sess->creation_time = get_jiffies_64();
264 spin_lock_init(&sess->session_stats_lock);
265 /*
266 * The FFP CmdSN window values will be allocated from the TPG's
267 * Initiator Node's ACL once the login has been successfully completed.
268 */
269 sess->max_cmd_sn = pdu->cmdsn;
270
271 sess->sess_ops = kzalloc(sizeof(struct iscsi_sess_ops), GFP_KERNEL);
272 if (!sess->sess_ops) {
273 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
274 ISCSI_LOGIN_STATUS_NO_RESOURCES);
275 pr_err("Unable to allocate memory for"
276 " struct iscsi_sess_ops.\n");
277 kfree(sess);
278 return -ENOMEM;
279 }
280
281 sess->se_sess = transport_init_session();
282 if (IS_ERR(sess->se_sess)) {
283 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
284 ISCSI_LOGIN_STATUS_NO_RESOURCES);
285 kfree(sess);
286 return -ENOMEM;
287 }
288
289 return 0;
290 }
291
292 static int iscsi_login_zero_tsih_s2(
293 struct iscsi_conn *conn)
294 {
295 struct iscsi_node_attrib *na;
296 struct iscsi_session *sess = conn->sess;
297 unsigned char buf[32];
298
299 sess->tpg = conn->tpg;
300
301 /*
302 * Assign a new TPG Session Handle. Note this is protected with
303 * struct iscsi_portal_group->np_login_sem from iscsit_access_np().
304 */
305 sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;
306 if (!sess->tsih)
307 sess->tsih = ++ISCSI_TPG_S(sess)->ntsih;
308
309 /*
310 * Create the default params from user defined values..
311 */
312 if (iscsi_copy_param_list(&conn->param_list,
313 ISCSI_TPG_C(conn)->param_list, 1) < 0) {
314 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
315 ISCSI_LOGIN_STATUS_NO_RESOURCES);
316 return -1;
317 }
318
319 iscsi_set_keys_to_negotiate(0, conn->param_list);
320
321 if (sess->sess_ops->SessionType)
322 return iscsi_set_keys_irrelevant_for_discovery(
323 conn->param_list);
324
325 na = iscsit_tpg_get_node_attrib(sess);
326
327 /*
328 * Need to send TargetPortalGroupTag back in first login response
329 * on any iSCSI connection where the Initiator provides TargetName.
330 * See 5.3.1. Login Phase Start
331 *
332 * In our case, we have already located the struct iscsi_tiqn at this point.
333 */
334 memset(buf, 0, 32);
335 sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt);
336 if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
337 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
338 ISCSI_LOGIN_STATUS_NO_RESOURCES);
339 return -1;
340 }
341
342 /*
343 * Workaround for Initiators that have broken connection recovery logic.
344 *
345 * "We would really like to get rid of this." Linux-iSCSI.org team
346 */
347 memset(buf, 0, 32);
348 sprintf(buf, "ErrorRecoveryLevel=%d", na->default_erl);
349 if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
350 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
351 ISCSI_LOGIN_STATUS_NO_RESOURCES);
352 return -1;
353 }
354
355 if (iscsi_login_disable_FIM_keys(conn->param_list, conn) < 0)
356 return -1;
357
358 return 0;
359 }
360
361 /*
362 * Remove PSTATE_NEGOTIATE for the four FIM related keys.
363 * The Initiator node will be able to enable FIM by proposing them itself.
364 */
365 int iscsi_login_disable_FIM_keys(
366 struct iscsi_param_list *param_list,
367 struct iscsi_conn *conn)
368 {
369 struct iscsi_param *param;
370
371 param = iscsi_find_param_from_key("OFMarker", param_list);
372 if (!param) {
373 pr_err("iscsi_find_param_from_key() for"
374 " OFMarker failed\n");
375 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
376 ISCSI_LOGIN_STATUS_NO_RESOURCES);
377 return -1;
378 }
379 param->state &= ~PSTATE_NEGOTIATE;
380
381 param = iscsi_find_param_from_key("OFMarkInt", param_list);
382 if (!param) {
383 pr_err("iscsi_find_param_from_key() for"
384 " IFMarker failed\n");
385 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
386 ISCSI_LOGIN_STATUS_NO_RESOURCES);
387 return -1;
388 }
389 param->state &= ~PSTATE_NEGOTIATE;
390
391 param = iscsi_find_param_from_key("IFMarker", param_list);
392 if (!param) {
393 pr_err("iscsi_find_param_from_key() for"
394 " IFMarker failed\n");
395 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
396 ISCSI_LOGIN_STATUS_NO_RESOURCES);
397 return -1;
398 }
399 param->state &= ~PSTATE_NEGOTIATE;
400
401 param = iscsi_find_param_from_key("IFMarkInt", param_list);
402 if (!param) {
403 pr_err("iscsi_find_param_from_key() for"
404 " IFMarker failed\n");
405 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
406 ISCSI_LOGIN_STATUS_NO_RESOURCES);
407 return -1;
408 }
409 param->state &= ~PSTATE_NEGOTIATE;
410
411 return 0;
412 }
413
414 static int iscsi_login_non_zero_tsih_s1(
415 struct iscsi_conn *conn,
416 unsigned char *buf)
417 {
418 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
419
420 iscsi_login_set_conn_values(NULL, conn, pdu->cid);
421 return 0;
422 }
423
424 /*
425 * Add a new connection to an existing session.
426 */
427 static int iscsi_login_non_zero_tsih_s2(
428 struct iscsi_conn *conn,
429 unsigned char *buf)
430 {
431 struct iscsi_portal_group *tpg = conn->tpg;
432 struct iscsi_session *sess = NULL, *sess_p = NULL;
433 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
434 struct se_session *se_sess, *se_sess_tmp;
435 struct iscsi_login_req *pdu = (struct iscsi_login_req *)buf;
436
437 spin_lock_bh(&se_tpg->session_lock);
438 list_for_each_entry_safe(se_sess, se_sess_tmp, &se_tpg->tpg_sess_list,
439 sess_list) {
440
441 sess_p = (struct iscsi_session *)se_sess->fabric_sess_ptr;
442 if (atomic_read(&sess_p->session_fall_back_to_erl0) ||
443 atomic_read(&sess_p->session_logout) ||
444 (sess_p->time2retain_timer_flags & ISCSI_TF_EXPIRED))
445 continue;
446 if (!memcmp(sess_p->isid, pdu->isid, 6) &&
447 (sess_p->tsih == pdu->tsih)) {
448 iscsit_inc_session_usage_count(sess_p);
449 iscsit_stop_time2retain_timer(sess_p);
450 sess = sess_p;
451 break;
452 }
453 }
454 spin_unlock_bh(&se_tpg->session_lock);
455
456 /*
457 * If the Time2Retain handler has expired, the session is already gone.
458 */
459 if (!sess) {
460 pr_err("Initiator attempting to add a connection to"
461 " a non-existent session, rejecting iSCSI Login.\n");
462 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
463 ISCSI_LOGIN_STATUS_NO_SESSION);
464 return -1;
465 }
466
467 /*
468 * Stop the Time2Retain timer if this is a failed session, we restart
469 * the timer if the login is not successful.
470 */
471 spin_lock_bh(&sess->conn_lock);
472 if (sess->session_state == TARG_SESS_STATE_FAILED)
473 atomic_set(&sess->session_continuation, 1);
474 spin_unlock_bh(&sess->conn_lock);
475
476 iscsi_login_set_conn_values(sess, conn, pdu->cid);
477
478 if (iscsi_copy_param_list(&conn->param_list,
479 ISCSI_TPG_C(conn)->param_list, 0) < 0) {
480 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
481 ISCSI_LOGIN_STATUS_NO_RESOURCES);
482 return -1;
483 }
484
485 iscsi_set_keys_to_negotiate(0, conn->param_list);
486 /*
487 * Need to send TargetPortalGroupTag back in first login response
488 * on any iSCSI connection where the Initiator provides TargetName.
489 * See 5.3.1. Login Phase Start
490 *
491 * In our case, we have already located the struct iscsi_tiqn at this point.
492 */
493 memset(buf, 0, 32);
494 sprintf(buf, "TargetPortalGroupTag=%hu", ISCSI_TPG_S(sess)->tpgt);
495 if (iscsi_change_param_value(buf, conn->param_list, 0) < 0) {
496 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
497 ISCSI_LOGIN_STATUS_NO_RESOURCES);
498 return -1;
499 }
500
501 return iscsi_login_disable_FIM_keys(conn->param_list, conn);
502 }
503
504 int iscsi_login_post_auth_non_zero_tsih(
505 struct iscsi_conn *conn,
506 u16 cid,
507 u32 exp_statsn)
508 {
509 struct iscsi_conn *conn_ptr = NULL;
510 struct iscsi_conn_recovery *cr = NULL;
511 struct iscsi_session *sess = conn->sess;
512
513 /*
514 * By following item 5 in the login table, if we have found
515 * an existing ISID and a valid/existing TSIH and an existing
516 * CID we do connection reinstatement. Currently we dont not
517 * support it so we send back an non-zero status class to the
518 * initiator and release the new connection.
519 */
520 conn_ptr = iscsit_get_conn_from_cid_rcfr(sess, cid);
521 if ((conn_ptr)) {
522 pr_err("Connection exists with CID %hu for %s,"
523 " performing connection reinstatement.\n",
524 conn_ptr->cid, sess->sess_ops->InitiatorName);
525
526 iscsit_connection_reinstatement_rcfr(conn_ptr);
527 iscsit_dec_conn_usage_count(conn_ptr);
528 }
529
530 /*
531 * Check for any connection recovery entires containing CID.
532 * We use the original ExpStatSN sent in the first login request
533 * to acknowledge commands for the failed connection.
534 *
535 * Also note that an explict logout may have already been sent,
536 * but the response may not be sent due to additional connection
537 * loss.
538 */
539 if (sess->sess_ops->ErrorRecoveryLevel == 2) {
540 cr = iscsit_get_inactive_connection_recovery_entry(
541 sess, cid);
542 if ((cr)) {
543 pr_debug("Performing implicit logout"
544 " for connection recovery on CID: %hu\n",
545 conn->cid);
546 iscsit_discard_cr_cmds_by_expstatsn(cr, exp_statsn);
547 }
548 }
549
550 /*
551 * Else we follow item 4 from the login table in that we have
552 * found an existing ISID and a valid/existing TSIH and a new
553 * CID we go ahead and continue to add a new connection to the
554 * session.
555 */
556 pr_debug("Adding CID %hu to existing session for %s.\n",
557 cid, sess->sess_ops->InitiatorName);
558
559 if ((atomic_read(&sess->nconn) + 1) > sess->sess_ops->MaxConnections) {
560 pr_err("Adding additional connection to this session"
561 " would exceed MaxConnections %d, login failed.\n",
562 sess->sess_ops->MaxConnections);
563 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
564 ISCSI_LOGIN_STATUS_ISID_ERROR);
565 return -1;
566 }
567
568 return 0;
569 }
570
571 static void iscsi_post_login_start_timers(struct iscsi_conn *conn)
572 {
573 struct iscsi_session *sess = conn->sess;
574
575 if (!sess->sess_ops->SessionType)
576 iscsit_start_nopin_timer(conn);
577 }
578
579 static int iscsi_post_login_handler(
580 struct iscsi_np *np,
581 struct iscsi_conn *conn,
582 u8 zero_tsih)
583 {
584 int stop_timer = 0;
585 struct iscsi_session *sess = conn->sess;
586 struct se_session *se_sess = sess->se_sess;
587 struct iscsi_portal_group *tpg = ISCSI_TPG_S(sess);
588 struct se_portal_group *se_tpg = &tpg->tpg_se_tpg;
589 struct iscsi_thread_set *ts;
590
591 iscsit_inc_conn_usage_count(conn);
592
593 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_SUCCESS,
594 ISCSI_LOGIN_STATUS_ACCEPT);
595
596 pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n");
597 conn->conn_state = TARG_CONN_STATE_LOGGED_IN;
598
599 iscsi_set_connection_parameters(conn->conn_ops, conn->param_list);
600 iscsit_set_sync_and_steering_values(conn);
601 /*
602 * SCSI Initiator -> SCSI Target Port Mapping
603 */
604 ts = iscsi_get_thread_set();
605 if (!zero_tsih) {
606 iscsi_set_session_parameters(sess->sess_ops,
607 conn->param_list, 0);
608 iscsi_release_param_list(conn->param_list);
609 conn->param_list = NULL;
610
611 spin_lock_bh(&sess->conn_lock);
612 atomic_set(&sess->session_continuation, 0);
613 if (sess->session_state == TARG_SESS_STATE_FAILED) {
614 pr_debug("Moving to"
615 " TARG_SESS_STATE_LOGGED_IN.\n");
616 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
617 stop_timer = 1;
618 }
619
620 pr_debug("iSCSI Login successful on CID: %hu from %s to"
621 " %s:%hu,%hu\n", conn->cid, conn->login_ip,
622 conn->local_ip, conn->local_port, tpg->tpgt);
623
624 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
625 atomic_inc(&sess->nconn);
626 pr_debug("Incremented iSCSI Connection count to %hu"
627 " from node: %s\n", atomic_read(&sess->nconn),
628 sess->sess_ops->InitiatorName);
629 spin_unlock_bh(&sess->conn_lock);
630
631 iscsi_post_login_start_timers(conn);
632 iscsi_activate_thread_set(conn, ts);
633 /*
634 * Determine CPU mask to ensure connection's RX and TX kthreads
635 * are scheduled on the same CPU.
636 */
637 iscsit_thread_get_cpumask(conn);
638 conn->conn_rx_reset_cpumask = 1;
639 conn->conn_tx_reset_cpumask = 1;
640
641 iscsit_dec_conn_usage_count(conn);
642 if (stop_timer) {
643 spin_lock_bh(&se_tpg->session_lock);
644 iscsit_stop_time2retain_timer(sess);
645 spin_unlock_bh(&se_tpg->session_lock);
646 }
647 iscsit_dec_session_usage_count(sess);
648 return 0;
649 }
650
651 iscsi_set_session_parameters(sess->sess_ops, conn->param_list, 1);
652 iscsi_release_param_list(conn->param_list);
653 conn->param_list = NULL;
654
655 iscsit_determine_maxcmdsn(sess);
656
657 spin_lock_bh(&se_tpg->session_lock);
658 __transport_register_session(&sess->tpg->tpg_se_tpg,
659 se_sess->se_node_acl, se_sess, sess);
660 pr_debug("Moving to TARG_SESS_STATE_LOGGED_IN.\n");
661 sess->session_state = TARG_SESS_STATE_LOGGED_IN;
662
663 pr_debug("iSCSI Login successful on CID: %hu from %s to %s:%hu,%hu\n",
664 conn->cid, conn->login_ip, conn->local_ip, conn->local_port,
665 tpg->tpgt);
666
667 spin_lock_bh(&sess->conn_lock);
668 list_add_tail(&conn->conn_list, &sess->sess_conn_list);
669 atomic_inc(&sess->nconn);
670 pr_debug("Incremented iSCSI Connection count to %hu from node:"
671 " %s\n", atomic_read(&sess->nconn),
672 sess->sess_ops->InitiatorName);
673 spin_unlock_bh(&sess->conn_lock);
674
675 sess->sid = tpg->sid++;
676 if (!sess->sid)
677 sess->sid = tpg->sid++;
678 pr_debug("Established iSCSI session from node: %s\n",
679 sess->sess_ops->InitiatorName);
680
681 tpg->nsessions++;
682 if (tpg->tpg_tiqn)
683 tpg->tpg_tiqn->tiqn_nsessions++;
684
685 pr_debug("Incremented number of active iSCSI sessions to %u on"
686 " iSCSI Target Portal Group: %hu\n", tpg->nsessions, tpg->tpgt);
687 spin_unlock_bh(&se_tpg->session_lock);
688
689 iscsi_post_login_start_timers(conn);
690 iscsi_activate_thread_set(conn, ts);
691 /*
692 * Determine CPU mask to ensure connection's RX and TX kthreads
693 * are scheduled on the same CPU.
694 */
695 iscsit_thread_get_cpumask(conn);
696 conn->conn_rx_reset_cpumask = 1;
697 conn->conn_tx_reset_cpumask = 1;
698
699 iscsit_dec_conn_usage_count(conn);
700
701 return 0;
702 }
703
704 static void iscsi_handle_login_thread_timeout(unsigned long data)
705 {
706 struct iscsi_np *np = (struct iscsi_np *) data;
707
708 spin_lock_bh(&np->np_thread_lock);
709 pr_err("iSCSI Login timeout on Network Portal %s:%hu\n",
710 np->np_ip, np->np_port);
711
712 if (np->np_login_timer_flags & ISCSI_TF_STOP) {
713 spin_unlock_bh(&np->np_thread_lock);
714 return;
715 }
716
717 if (np->np_thread)
718 send_sig(SIGINT, np->np_thread, 1);
719
720 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
721 spin_unlock_bh(&np->np_thread_lock);
722 }
723
724 static void iscsi_start_login_thread_timer(struct iscsi_np *np)
725 {
726 /*
727 * This used the TA_LOGIN_TIMEOUT constant because at this
728 * point we do not have access to ISCSI_TPG_ATTRIB(tpg)->login_timeout
729 */
730 spin_lock_bh(&np->np_thread_lock);
731 init_timer(&np->np_login_timer);
732 np->np_login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
733 np->np_login_timer.data = (unsigned long)np;
734 np->np_login_timer.function = iscsi_handle_login_thread_timeout;
735 np->np_login_timer_flags &= ~ISCSI_TF_STOP;
736 np->np_login_timer_flags |= ISCSI_TF_RUNNING;
737 add_timer(&np->np_login_timer);
738
739 pr_debug("Added timeout timer to iSCSI login request for"
740 " %u seconds.\n", TA_LOGIN_TIMEOUT);
741 spin_unlock_bh(&np->np_thread_lock);
742 }
743
744 static void iscsi_stop_login_thread_timer(struct iscsi_np *np)
745 {
746 spin_lock_bh(&np->np_thread_lock);
747 if (!(np->np_login_timer_flags & ISCSI_TF_RUNNING)) {
748 spin_unlock_bh(&np->np_thread_lock);
749 return;
750 }
751 np->np_login_timer_flags |= ISCSI_TF_STOP;
752 spin_unlock_bh(&np->np_thread_lock);
753
754 del_timer_sync(&np->np_login_timer);
755
756 spin_lock_bh(&np->np_thread_lock);
757 np->np_login_timer_flags &= ~ISCSI_TF_RUNNING;
758 spin_unlock_bh(&np->np_thread_lock);
759 }
760
761 int iscsi_target_setup_login_socket(
762 struct iscsi_np *np,
763 struct __kernel_sockaddr_storage *sockaddr)
764 {
765 struct socket *sock;
766 int backlog = 5, ret, opt = 0, len;
767
768 switch (np->np_network_transport) {
769 case ISCSI_TCP:
770 np->np_ip_proto = IPPROTO_TCP;
771 np->np_sock_type = SOCK_STREAM;
772 break;
773 case ISCSI_SCTP_TCP:
774 np->np_ip_proto = IPPROTO_SCTP;
775 np->np_sock_type = SOCK_STREAM;
776 break;
777 case ISCSI_SCTP_UDP:
778 np->np_ip_proto = IPPROTO_SCTP;
779 np->np_sock_type = SOCK_SEQPACKET;
780 break;
781 case ISCSI_IWARP_TCP:
782 case ISCSI_IWARP_SCTP:
783 case ISCSI_INFINIBAND:
784 default:
785 pr_err("Unsupported network_transport: %d\n",
786 np->np_network_transport);
787 return -EINVAL;
788 }
789
790 ret = sock_create(sockaddr->ss_family, np->np_sock_type,
791 np->np_ip_proto, &sock);
792 if (ret < 0) {
793 pr_err("sock_create() failed.\n");
794 return ret;
795 }
796 np->np_socket = sock;
797 /*
798 * The SCTP stack needs struct socket->file.
799 */
800 if ((np->np_network_transport == ISCSI_SCTP_TCP) ||
801 (np->np_network_transport == ISCSI_SCTP_UDP)) {
802 if (!sock->file) {
803 sock->file = kzalloc(sizeof(struct file), GFP_KERNEL);
804 if (!sock->file) {
805 pr_err("Unable to allocate struct"
806 " file for SCTP\n");
807 ret = -ENOMEM;
808 goto fail;
809 }
810 np->np_flags |= NPF_SCTP_STRUCT_FILE;
811 }
812 }
813 /*
814 * Setup the np->np_sockaddr from the passed sockaddr setup
815 * in iscsi_target_configfs.c code..
816 */
817 memcpy(&np->np_sockaddr, sockaddr,
818 sizeof(struct __kernel_sockaddr_storage));
819
820 if (sockaddr->ss_family == AF_INET6)
821 len = sizeof(struct sockaddr_in6);
822 else
823 len = sizeof(struct sockaddr_in);
824 /*
825 * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY.
826 */
827 /* FIXME: Someone please explain why this is endian-safe */
828 opt = 1;
829 if (np->np_network_transport == ISCSI_TCP) {
830 ret = kernel_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
831 (char *)&opt, sizeof(opt));
832 if (ret < 0) {
833 pr_err("kernel_setsockopt() for TCP_NODELAY"
834 " failed: %d\n", ret);
835 goto fail;
836 }
837 }
838
839 /* FIXME: Someone please explain why this is endian-safe */
840 ret = kernel_setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
841 (char *)&opt, sizeof(opt));
842 if (ret < 0) {
843 pr_err("kernel_setsockopt() for SO_REUSEADDR"
844 " failed\n");
845 goto fail;
846 }
847
848 ret = kernel_setsockopt(sock, IPPROTO_IP, IP_FREEBIND,
849 (char *)&opt, sizeof(opt));
850 if (ret < 0) {
851 pr_err("kernel_setsockopt() for IP_FREEBIND"
852 " failed\n");
853 goto fail;
854 }
855
856 ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len);
857 if (ret < 0) {
858 pr_err("kernel_bind() failed: %d\n", ret);
859 goto fail;
860 }
861
862 ret = kernel_listen(sock, backlog);
863 if (ret != 0) {
864 pr_err("kernel_listen() failed: %d\n", ret);
865 goto fail;
866 }
867
868 return 0;
869
870 fail:
871 np->np_socket = NULL;
872 if (sock) {
873 if (np->np_flags & NPF_SCTP_STRUCT_FILE) {
874 kfree(sock->file);
875 sock->file = NULL;
876 }
877
878 sock_release(sock);
879 }
880 return ret;
881 }
882
883 static int __iscsi_target_login_thread(struct iscsi_np *np)
884 {
885 u8 buffer[ISCSI_HDR_LEN], iscsi_opcode, zero_tsih = 0;
886 int err, ret = 0, set_sctp_conn_flag, stop;
887 struct iscsi_conn *conn = NULL;
888 struct iscsi_login *login;
889 struct iscsi_portal_group *tpg = NULL;
890 struct socket *new_sock, *sock;
891 struct kvec iov;
892 struct iscsi_login_req *pdu;
893 struct sockaddr_in sock_in;
894 struct sockaddr_in6 sock_in6;
895
896 flush_signals(current);
897 set_sctp_conn_flag = 0;
898 sock = np->np_socket;
899
900 spin_lock_bh(&np->np_thread_lock);
901 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
902 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
903 complete(&np->np_restart_comp);
904 } else {
905 np->np_thread_state = ISCSI_NP_THREAD_ACTIVE;
906 }
907 spin_unlock_bh(&np->np_thread_lock);
908
909 if (kernel_accept(sock, &new_sock, 0) < 0) {
910 spin_lock_bh(&np->np_thread_lock);
911 if (np->np_thread_state == ISCSI_NP_THREAD_RESET) {
912 spin_unlock_bh(&np->np_thread_lock);
913 complete(&np->np_restart_comp);
914 /* Get another socket */
915 return 1;
916 }
917 spin_unlock_bh(&np->np_thread_lock);
918 goto out;
919 }
920 /*
921 * The SCTP stack needs struct socket->file.
922 */
923 if ((np->np_network_transport == ISCSI_SCTP_TCP) ||
924 (np->np_network_transport == ISCSI_SCTP_UDP)) {
925 if (!new_sock->file) {
926 new_sock->file = kzalloc(
927 sizeof(struct file), GFP_KERNEL);
928 if (!new_sock->file) {
929 pr_err("Unable to allocate struct"
930 " file for SCTP\n");
931 sock_release(new_sock);
932 /* Get another socket */
933 return 1;
934 }
935 set_sctp_conn_flag = 1;
936 }
937 }
938
939 iscsi_start_login_thread_timer(np);
940
941 conn = kzalloc(sizeof(struct iscsi_conn), GFP_KERNEL);
942 if (!conn) {
943 pr_err("Could not allocate memory for"
944 " new connection\n");
945 if (set_sctp_conn_flag) {
946 kfree(new_sock->file);
947 new_sock->file = NULL;
948 }
949 sock_release(new_sock);
950 /* Get another socket */
951 return 1;
952 }
953
954 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
955 conn->conn_state = TARG_CONN_STATE_FREE;
956 conn->sock = new_sock;
957
958 if (set_sctp_conn_flag)
959 conn->conn_flags |= CONNFLAG_SCTP_STRUCT_FILE;
960
961 pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
962 conn->conn_state = TARG_CONN_STATE_XPT_UP;
963
964 /*
965 * Allocate conn->conn_ops early as a failure calling
966 * iscsit_tx_login_rsp() below will call tx_data().
967 */
968 conn->conn_ops = kzalloc(sizeof(struct iscsi_conn_ops), GFP_KERNEL);
969 if (!conn->conn_ops) {
970 pr_err("Unable to allocate memory for"
971 " struct iscsi_conn_ops.\n");
972 goto new_sess_out;
973 }
974 /*
975 * Perform the remaining iSCSI connection initialization items..
976 */
977 if (iscsi_login_init_conn(conn) < 0)
978 goto new_sess_out;
979
980 memset(buffer, 0, ISCSI_HDR_LEN);
981 memset(&iov, 0, sizeof(struct kvec));
982 iov.iov_base = buffer;
983 iov.iov_len = ISCSI_HDR_LEN;
984
985 if (rx_data(conn, &iov, 1, ISCSI_HDR_LEN) <= 0) {
986 pr_err("rx_data() returned an error.\n");
987 goto new_sess_out;
988 }
989
990 iscsi_opcode = (buffer[0] & ISCSI_OPCODE_MASK);
991 if (!(iscsi_opcode & ISCSI_OP_LOGIN)) {
992 pr_err("First opcode is not login request,"
993 " failing login request.\n");
994 goto new_sess_out;
995 }
996
997 pdu = (struct iscsi_login_req *) buffer;
998 pdu->cid = be16_to_cpu(pdu->cid);
999 pdu->tsih = be16_to_cpu(pdu->tsih);
1000 pdu->itt = be32_to_cpu(pdu->itt);
1001 pdu->cmdsn = be32_to_cpu(pdu->cmdsn);
1002 pdu->exp_statsn = be32_to_cpu(pdu->exp_statsn);
1003 /*
1004 * Used by iscsit_tx_login_rsp() for Login Resonses PDUs
1005 * when Status-Class != 0.
1006 */
1007 conn->login_itt = pdu->itt;
1008
1009 spin_lock_bh(&np->np_thread_lock);
1010 if (np->np_thread_state != ISCSI_NP_THREAD_ACTIVE) {
1011 spin_unlock_bh(&np->np_thread_lock);
1012 pr_err("iSCSI Network Portal on %s:%hu currently not"
1013 " active.\n", np->np_ip, np->np_port);
1014 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1015 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
1016 goto new_sess_out;
1017 }
1018 spin_unlock_bh(&np->np_thread_lock);
1019
1020 if (np->np_sockaddr.ss_family == AF_INET6) {
1021 memset(&sock_in6, 0, sizeof(struct sockaddr_in6));
1022
1023 if (conn->sock->ops->getname(conn->sock,
1024 (struct sockaddr *)&sock_in6, &err, 1) < 0) {
1025 pr_err("sock_ops->getname() failed.\n");
1026 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1027 ISCSI_LOGIN_STATUS_TARGET_ERROR);
1028 goto new_sess_out;
1029 }
1030 snprintf(conn->login_ip, sizeof(conn->login_ip), "%pI6c",
1031 &sock_in6.sin6_addr.in6_u);
1032 conn->login_port = ntohs(sock_in6.sin6_port);
1033
1034 if (conn->sock->ops->getname(conn->sock,
1035 (struct sockaddr *)&sock_in6, &err, 0) < 0) {
1036 pr_err("sock_ops->getname() failed.\n");
1037 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1038 ISCSI_LOGIN_STATUS_TARGET_ERROR);
1039 goto new_sess_out;
1040 }
1041 snprintf(conn->local_ip, sizeof(conn->local_ip), "%pI6c",
1042 &sock_in6.sin6_addr.in6_u);
1043 conn->local_port = ntohs(sock_in6.sin6_port);
1044
1045 } else {
1046 memset(&sock_in, 0, sizeof(struct sockaddr_in));
1047
1048 if (conn->sock->ops->getname(conn->sock,
1049 (struct sockaddr *)&sock_in, &err, 1) < 0) {
1050 pr_err("sock_ops->getname() failed.\n");
1051 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1052 ISCSI_LOGIN_STATUS_TARGET_ERROR);
1053 goto new_sess_out;
1054 }
1055 sprintf(conn->login_ip, "%pI4", &sock_in.sin_addr.s_addr);
1056 conn->login_port = ntohs(sock_in.sin_port);
1057
1058 if (conn->sock->ops->getname(conn->sock,
1059 (struct sockaddr *)&sock_in, &err, 0) < 0) {
1060 pr_err("sock_ops->getname() failed.\n");
1061 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1062 ISCSI_LOGIN_STATUS_TARGET_ERROR);
1063 goto new_sess_out;
1064 }
1065 sprintf(conn->local_ip, "%pI4", &sock_in.sin_addr.s_addr);
1066 conn->local_port = ntohs(sock_in.sin_port);
1067 }
1068
1069 conn->network_transport = np->np_network_transport;
1070
1071 pr_debug("Received iSCSI login request from %s on %s Network"
1072 " Portal %s:%hu\n", conn->login_ip,
1073 (conn->network_transport == ISCSI_TCP) ? "TCP" : "SCTP",
1074 conn->local_ip, conn->local_port);
1075
1076 pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
1077 conn->conn_state = TARG_CONN_STATE_IN_LOGIN;
1078
1079 if (iscsi_login_check_initiator_version(conn, pdu->max_version,
1080 pdu->min_version) < 0)
1081 goto new_sess_out;
1082
1083 zero_tsih = (pdu->tsih == 0x0000);
1084 if ((zero_tsih)) {
1085 /*
1086 * This is the leading connection of a new session.
1087 * We wait until after authentication to check for
1088 * session reinstatement.
1089 */
1090 if (iscsi_login_zero_tsih_s1(conn, buffer) < 0)
1091 goto new_sess_out;
1092 } else {
1093 /*
1094 * Add a new connection to an existing session.
1095 * We check for a non-existant session in
1096 * iscsi_login_non_zero_tsih_s2() below based
1097 * on ISID/TSIH, but wait until after authentication
1098 * to check for connection reinstatement, etc.
1099 */
1100 if (iscsi_login_non_zero_tsih_s1(conn, buffer) < 0)
1101 goto new_sess_out;
1102 }
1103
1104 /*
1105 * This will process the first login request, and call
1106 * iscsi_target_locate_portal(), and return a valid struct iscsi_login.
1107 */
1108 login = iscsi_target_init_negotiation(np, conn, buffer);
1109 if (!login) {
1110 tpg = conn->tpg;
1111 goto new_sess_out;
1112 }
1113
1114 tpg = conn->tpg;
1115 if (!tpg) {
1116 pr_err("Unable to locate struct iscsi_conn->tpg\n");
1117 goto new_sess_out;
1118 }
1119
1120 if (zero_tsih) {
1121 if (iscsi_login_zero_tsih_s2(conn) < 0) {
1122 iscsi_target_nego_release(login, conn);
1123 goto new_sess_out;
1124 }
1125 } else {
1126 if (iscsi_login_non_zero_tsih_s2(conn, buffer) < 0) {
1127 iscsi_target_nego_release(login, conn);
1128 goto old_sess_out;
1129 }
1130 }
1131
1132 if (iscsi_target_start_negotiation(login, conn) < 0)
1133 goto new_sess_out;
1134
1135 if (!conn->sess) {
1136 pr_err("struct iscsi_conn session pointer is NULL!\n");
1137 goto new_sess_out;
1138 }
1139
1140 iscsi_stop_login_thread_timer(np);
1141
1142 if (signal_pending(current))
1143 goto new_sess_out;
1144
1145 ret = iscsi_post_login_handler(np, conn, zero_tsih);
1146
1147 if (ret < 0)
1148 goto new_sess_out;
1149
1150 iscsit_deaccess_np(np, tpg);
1151 tpg = NULL;
1152 /* Get another socket */
1153 return 1;
1154
1155 new_sess_out:
1156 pr_err("iSCSI Login negotiation failed.\n");
1157 iscsit_collect_login_stats(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
1158 ISCSI_LOGIN_STATUS_INIT_ERR);
1159 if (!zero_tsih || !conn->sess)
1160 goto old_sess_out;
1161 if (conn->sess->se_sess)
1162 transport_free_session(conn->sess->se_sess);
1163 if (conn->sess->session_index != 0) {
1164 spin_lock_bh(&sess_idr_lock);
1165 idr_remove(&sess_idr, conn->sess->session_index);
1166 spin_unlock_bh(&sess_idr_lock);
1167 }
1168 if (conn->sess->sess_ops)
1169 kfree(conn->sess->sess_ops);
1170 if (conn->sess)
1171 kfree(conn->sess);
1172 old_sess_out:
1173 iscsi_stop_login_thread_timer(np);
1174 /*
1175 * If login negotiation fails check if the Time2Retain timer
1176 * needs to be restarted.
1177 */
1178 if (!zero_tsih && conn->sess) {
1179 spin_lock_bh(&conn->sess->conn_lock);
1180 if (conn->sess->session_state == TARG_SESS_STATE_FAILED) {
1181 struct se_portal_group *se_tpg =
1182 &ISCSI_TPG_C(conn)->tpg_se_tpg;
1183
1184 atomic_set(&conn->sess->session_continuation, 0);
1185 spin_unlock_bh(&conn->sess->conn_lock);
1186 spin_lock_bh(&se_tpg->session_lock);
1187 iscsit_start_time2retain_handler(conn->sess);
1188 spin_unlock_bh(&se_tpg->session_lock);
1189 } else
1190 spin_unlock_bh(&conn->sess->conn_lock);
1191 iscsit_dec_session_usage_count(conn->sess);
1192 }
1193
1194 if (!IS_ERR(conn->conn_rx_hash.tfm))
1195 crypto_free_hash(conn->conn_rx_hash.tfm);
1196 if (!IS_ERR(conn->conn_tx_hash.tfm))
1197 crypto_free_hash(conn->conn_tx_hash.tfm);
1198
1199 if (conn->conn_cpumask)
1200 free_cpumask_var(conn->conn_cpumask);
1201
1202 kfree(conn->conn_ops);
1203
1204 if (conn->param_list) {
1205 iscsi_release_param_list(conn->param_list);
1206 conn->param_list = NULL;
1207 }
1208 if (conn->sock) {
1209 if (conn->conn_flags & CONNFLAG_SCTP_STRUCT_FILE) {
1210 kfree(conn->sock->file);
1211 conn->sock->file = NULL;
1212 }
1213 sock_release(conn->sock);
1214 }
1215 kfree(conn);
1216
1217 if (tpg) {
1218 iscsit_deaccess_np(np, tpg);
1219 tpg = NULL;
1220 }
1221
1222 out:
1223 stop = kthread_should_stop();
1224 if (!stop && signal_pending(current)) {
1225 spin_lock_bh(&np->np_thread_lock);
1226 stop = (np->np_thread_state == ISCSI_NP_THREAD_SHUTDOWN);
1227 spin_unlock_bh(&np->np_thread_lock);
1228 }
1229 /* Wait for another socket.. */
1230 if (!stop)
1231 return 1;
1232
1233 iscsi_stop_login_thread_timer(np);
1234 spin_lock_bh(&np->np_thread_lock);
1235 np->np_thread_state = ISCSI_NP_THREAD_EXIT;
1236 spin_unlock_bh(&np->np_thread_lock);
1237 return 0;
1238 }
1239
1240 int iscsi_target_login_thread(void *arg)
1241 {
1242 struct iscsi_np *np = arg;
1243 int ret;
1244
1245 allow_signal(SIGINT);
1246
1247 while (!kthread_should_stop()) {
1248 ret = __iscsi_target_login_thread(np);
1249 /*
1250 * We break and exit here unless another sock_accept() call
1251 * is expected.
1252 */
1253 if (ret != 1)
1254 break;
1255 }
1256
1257 return 0;
1258 }
Linux kernel - Deliverables
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