1 /*******************************************************************************
2 * This file contains the login functions used by the iSCSI Target driver.
4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
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.
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 ******************************************************************************/
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>
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"
42 extern struct idr sess_idr
;
43 extern struct mutex auth_id_lock
;
44 extern spinlock_t sess_idr_lock
;
46 static int iscsi_login_init_conn(struct iscsi_conn
*conn
)
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
);
66 if (!zalloc_cpumask_var(&conn
->conn_cpumask
, GFP_KERNEL
)) {
67 pr_err("Unable to allocate conn->conn_cpumask\n");
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
78 int iscsi_login_setup_crypto(struct iscsi_conn
*conn
)
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
85 conn
->conn_rx_hash
.flags
= 0;
86 conn
->conn_rx_hash
.tfm
= crypto_alloc_hash("crc32c", 0,
88 if (IS_ERR(conn
->conn_rx_hash
.tfm
)) {
89 pr_err("crypto_alloc_hash() failed for conn_rx_tfm\n");
93 conn
->conn_tx_hash
.flags
= 0;
94 conn
->conn_tx_hash
.tfm
= crypto_alloc_hash("crc32c", 0,
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
);
105 static int iscsi_login_check_initiator_version(
106 struct iscsi_conn
*conn
,
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
);
122 int iscsi_check_for_session_reinstatement(struct iscsi_conn
*conn
)
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
;
131 initiatorname_param
= iscsi_find_param_from_key(
132 INITIATORNAME
, conn
->param_list
);
133 if (!initiatorname_param
)
136 sessiontype_param
= iscsi_find_param_from_key(
137 SESSIONTYPE
, conn
->param_list
);
138 if (!sessiontype_param
)
141 sessiontype
= (strncmp(sessiontype_param
->value
, NORMAL
, 6)) ? 1 : 0;
143 spin_lock_bh(&se_tpg
->session_lock
);
144 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
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
);
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
);
166 spin_unlock(&sess_p
->conn_lock
);
168 spin_unlock_bh(&se_tpg
->session_lock
);
170 * If the Time2Retain handler has expired, the session is already gone.
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
);
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
);
187 spin_unlock_bh(&sess
->conn_lock
);
189 iscsit_stop_session(sess
, 1, 1);
190 iscsit_dec_session_usage_count(sess
);
192 target_put_session(sess
->se_sess
);
196 static void iscsi_login_set_conn_values(
197 struct iscsi_session
*sess
,
198 struct iscsi_conn
*conn
,
204 * Generate a random Status sequence number (statsn) for the new
207 get_random_bytes(&conn
->stat_sn
, sizeof(u32
));
209 mutex_lock(&auth_id_lock
);
210 conn
->auth_id
= iscsit_global
->auth_id
++;
211 mutex_unlock(&auth_id_lock
);
215 * This is the leading connection of a new session,
216 * or session reinstatement.
218 static int iscsi_login_zero_tsih_s1(
219 struct iscsi_conn
*conn
,
222 struct iscsi_session
*sess
= NULL
;
223 struct iscsi_login_req
*pdu
= (struct iscsi_login_req
*)buf
;
225 sess
= kzalloc(sizeof(struct iscsi_session
), GFP_KERNEL
);
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");
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
);
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
);
259 spin_lock(&sess_idr_lock
);
260 idr_get_new(&sess_idr
, NULL
, &sess
->session_index
);
261 spin_unlock(&sess_idr_lock
);
263 sess
->creation_time
= get_jiffies_64();
264 spin_lock_init(&sess
->session_stats_lock
);
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.
269 sess
->max_cmd_sn
= pdu
->cmdsn
;
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");
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
);
292 static int iscsi_login_zero_tsih_s2(
293 struct iscsi_conn
*conn
)
295 struct iscsi_node_attrib
*na
;
296 struct iscsi_session
*sess
= conn
->sess
;
297 unsigned char buf
[32];
299 sess
->tpg
= conn
->tpg
;
302 * Assign a new TPG Session Handle. Note this is protected with
303 * struct iscsi_portal_group->np_login_sem from iscsit_access_np().
305 sess
->tsih
= ++ISCSI_TPG_S(sess
)->ntsih
;
307 sess
->tsih
= ++ISCSI_TPG_S(sess
)->ntsih
;
310 * Create the default params from user defined values..
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
);
319 iscsi_set_keys_to_negotiate(0, conn
->param_list
);
321 if (sess
->sess_ops
->SessionType
)
322 return iscsi_set_keys_irrelevant_for_discovery(
325 na
= iscsit_tpg_get_node_attrib(sess
);
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
332 * In our case, we have already located the struct iscsi_tiqn at this point.
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
);
343 * Workaround for Initiators that have broken connection recovery logic.
345 * "We would really like to get rid of this." Linux-iSCSI.org team
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
);
355 if (iscsi_login_disable_FIM_keys(conn
->param_list
, conn
) < 0)
362 * Remove PSTATE_NEGOTIATE for the four FIM related keys.
363 * The Initiator node will be able to enable FIM by proposing them itself.
365 int iscsi_login_disable_FIM_keys(
366 struct iscsi_param_list
*param_list
,
367 struct iscsi_conn
*conn
)
369 struct iscsi_param
*param
;
371 param
= iscsi_find_param_from_key("OFMarker", param_list
);
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
);
379 param
->state
&= ~PSTATE_NEGOTIATE
;
381 param
= iscsi_find_param_from_key("OFMarkInt", param_list
);
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
);
389 param
->state
&= ~PSTATE_NEGOTIATE
;
391 param
= iscsi_find_param_from_key("IFMarker", param_list
);
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
);
399 param
->state
&= ~PSTATE_NEGOTIATE
;
401 param
= iscsi_find_param_from_key("IFMarkInt", param_list
);
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
);
409 param
->state
&= ~PSTATE_NEGOTIATE
;
414 static int iscsi_login_non_zero_tsih_s1(
415 struct iscsi_conn
*conn
,
418 struct iscsi_login_req
*pdu
= (struct iscsi_login_req
*)buf
;
420 iscsi_login_set_conn_values(NULL
, conn
, pdu
->cid
);
425 * Add a new connection to an existing session.
427 static int iscsi_login_non_zero_tsih_s2(
428 struct iscsi_conn
*conn
,
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
;
437 spin_lock_bh(&se_tpg
->session_lock
);
438 list_for_each_entry_safe(se_sess
, se_sess_tmp
, &se_tpg
->tpg_sess_list
,
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
))
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
);
454 spin_unlock_bh(&se_tpg
->session_lock
);
457 * If the Time2Retain handler has expired, the session is already gone.
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
);
468 * Stop the Time2Retain timer if this is a failed session, we restart
469 * the timer if the login is not successful.
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
);
476 iscsi_login_set_conn_values(sess
, conn
, pdu
->cid
);
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
);
485 iscsi_set_keys_to_negotiate(0, conn
->param_list
);
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
491 * In our case, we have already located the struct iscsi_tiqn at this point.
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
);
501 return iscsi_login_disable_FIM_keys(conn
->param_list
, conn
);
504 int iscsi_login_post_auth_non_zero_tsih(
505 struct iscsi_conn
*conn
,
509 struct iscsi_conn
*conn_ptr
= NULL
;
510 struct iscsi_conn_recovery
*cr
= NULL
;
511 struct iscsi_session
*sess
= conn
->sess
;
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.
520 conn_ptr
= iscsit_get_conn_from_cid_rcfr(sess
, cid
);
522 pr_err("Connection exists with CID %hu for %s,"
523 " performing connection reinstatement.\n",
524 conn_ptr
->cid
, sess
->sess_ops
->InitiatorName
);
526 iscsit_connection_reinstatement_rcfr(conn_ptr
);
527 iscsit_dec_conn_usage_count(conn_ptr
);
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.
535 * Also note that an explict logout may have already been sent,
536 * but the response may not be sent due to additional connection
539 if (sess
->sess_ops
->ErrorRecoveryLevel
== 2) {
540 cr
= iscsit_get_inactive_connection_recovery_entry(
543 pr_debug("Performing implicit logout"
544 " for connection recovery on CID: %hu\n",
546 iscsit_discard_cr_cmds_by_expstatsn(cr
, exp_statsn
);
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
556 pr_debug("Adding CID %hu to existing session for %s.\n",
557 cid
, sess
->sess_ops
->InitiatorName
);
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
);
571 static void iscsi_post_login_start_timers(struct iscsi_conn
*conn
)
573 struct iscsi_session
*sess
= conn
->sess
;
575 if (!sess
->sess_ops
->SessionType
)
576 iscsit_start_nopin_timer(conn
);
579 static int iscsi_post_login_handler(
581 struct iscsi_conn
*conn
,
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
;
591 iscsit_inc_conn_usage_count(conn
);
593 iscsit_collect_login_stats(conn
, ISCSI_STATUS_CLS_SUCCESS
,
594 ISCSI_LOGIN_STATUS_ACCEPT
);
596 pr_debug("Moving to TARG_CONN_STATE_LOGGED_IN.\n");
597 conn
->conn_state
= TARG_CONN_STATE_LOGGED_IN
;
599 iscsi_set_connection_parameters(conn
->conn_ops
, conn
->param_list
);
600 iscsit_set_sync_and_steering_values(conn
);
602 * SCSI Initiator -> SCSI Target Port Mapping
604 ts
= iscsi_get_thread_set();
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
;
611 spin_lock_bh(&sess
->conn_lock
);
612 atomic_set(&sess
->session_continuation
, 0);
613 if (sess
->session_state
== TARG_SESS_STATE_FAILED
) {
615 " TARG_SESS_STATE_LOGGED_IN.\n");
616 sess
->session_state
= TARG_SESS_STATE_LOGGED_IN
;
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
);
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
);
631 iscsi_post_login_start_timers(conn
);
632 iscsi_activate_thread_set(conn
, ts
);
634 * Determine CPU mask to ensure connection's RX and TX kthreads
635 * are scheduled on the same CPU.
637 iscsit_thread_get_cpumask(conn
);
638 conn
->conn_rx_reset_cpumask
= 1;
639 conn
->conn_tx_reset_cpumask
= 1;
641 iscsit_dec_conn_usage_count(conn
);
643 spin_lock_bh(&se_tpg
->session_lock
);
644 iscsit_stop_time2retain_timer(sess
);
645 spin_unlock_bh(&se_tpg
->session_lock
);
647 iscsit_dec_session_usage_count(sess
);
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
;
655 iscsit_determine_maxcmdsn(sess
);
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
;
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
,
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
);
675 sess
->sid
= tpg
->sid
++;
677 sess
->sid
= tpg
->sid
++;
678 pr_debug("Established iSCSI session from node: %s\n",
679 sess
->sess_ops
->InitiatorName
);
683 tpg
->tpg_tiqn
->tiqn_nsessions
++;
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
);
689 iscsi_post_login_start_timers(conn
);
690 iscsi_activate_thread_set(conn
, ts
);
692 * Determine CPU mask to ensure connection's RX and TX kthreads
693 * are scheduled on the same CPU.
695 iscsit_thread_get_cpumask(conn
);
696 conn
->conn_rx_reset_cpumask
= 1;
697 conn
->conn_tx_reset_cpumask
= 1;
699 iscsit_dec_conn_usage_count(conn
);
704 static void iscsi_handle_login_thread_timeout(unsigned long data
)
706 struct iscsi_np
*np
= (struct iscsi_np
*) data
;
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
);
712 if (np
->np_login_timer_flags
& ISCSI_TF_STOP
) {
713 spin_unlock_bh(&np
->np_thread_lock
);
718 send_sig(SIGINT
, np
->np_thread
, 1);
720 np
->np_login_timer_flags
&= ~ISCSI_TF_RUNNING
;
721 spin_unlock_bh(&np
->np_thread_lock
);
724 static void iscsi_start_login_thread_timer(struct iscsi_np
*np
)
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
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
);
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
);
744 static void iscsi_stop_login_thread_timer(struct iscsi_np
*np
)
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
);
751 np
->np_login_timer_flags
|= ISCSI_TF_STOP
;
752 spin_unlock_bh(&np
->np_thread_lock
);
754 del_timer_sync(&np
->np_login_timer
);
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
);
761 int iscsi_target_setup_login_socket(
763 struct __kernel_sockaddr_storage
*sockaddr
)
766 int backlog
= 5, ret
, opt
= 0, len
;
768 switch (np
->np_network_transport
) {
770 np
->np_ip_proto
= IPPROTO_TCP
;
771 np
->np_sock_type
= SOCK_STREAM
;
774 np
->np_ip_proto
= IPPROTO_SCTP
;
775 np
->np_sock_type
= SOCK_STREAM
;
778 np
->np_ip_proto
= IPPROTO_SCTP
;
779 np
->np_sock_type
= SOCK_SEQPACKET
;
781 case ISCSI_IWARP_TCP
:
782 case ISCSI_IWARP_SCTP
:
783 case ISCSI_INFINIBAND
:
785 pr_err("Unsupported network_transport: %d\n",
786 np
->np_network_transport
);
790 ret
= sock_create(sockaddr
->ss_family
, np
->np_sock_type
,
791 np
->np_ip_proto
, &sock
);
793 pr_err("sock_create() failed.\n");
796 np
->np_socket
= sock
;
798 * Setup the np->np_sockaddr from the passed sockaddr setup
799 * in iscsi_target_configfs.c code..
801 memcpy(&np
->np_sockaddr
, sockaddr
,
802 sizeof(struct __kernel_sockaddr_storage
));
804 if (sockaddr
->ss_family
== AF_INET6
)
805 len
= sizeof(struct sockaddr_in6
);
807 len
= sizeof(struct sockaddr_in
);
809 * Set SO_REUSEADDR, and disable Nagel Algorithm with TCP_NODELAY.
811 /* FIXME: Someone please explain why this is endian-safe */
813 if (np
->np_network_transport
== ISCSI_TCP
) {
814 ret
= kernel_setsockopt(sock
, IPPROTO_TCP
, TCP_NODELAY
,
815 (char *)&opt
, sizeof(opt
));
817 pr_err("kernel_setsockopt() for TCP_NODELAY"
818 " failed: %d\n", ret
);
823 /* FIXME: Someone please explain why this is endian-safe */
824 ret
= kernel_setsockopt(sock
, SOL_SOCKET
, SO_REUSEADDR
,
825 (char *)&opt
, sizeof(opt
));
827 pr_err("kernel_setsockopt() for SO_REUSEADDR"
832 ret
= kernel_setsockopt(sock
, IPPROTO_IP
, IP_FREEBIND
,
833 (char *)&opt
, sizeof(opt
));
835 pr_err("kernel_setsockopt() for IP_FREEBIND"
840 ret
= kernel_bind(sock
, (struct sockaddr
*)&np
->np_sockaddr
, len
);
842 pr_err("kernel_bind() failed: %d\n", ret
);
846 ret
= kernel_listen(sock
, backlog
);
848 pr_err("kernel_listen() failed: %d\n", ret
);
855 np
->np_socket
= NULL
;
861 static int __iscsi_target_login_thread(struct iscsi_np
*np
)
863 u8 buffer
[ISCSI_HDR_LEN
], iscsi_opcode
, zero_tsih
= 0;
864 int err
, ret
= 0, stop
;
865 struct iscsi_conn
*conn
= NULL
;
866 struct iscsi_login
*login
;
867 struct iscsi_portal_group
*tpg
= NULL
;
868 struct socket
*new_sock
, *sock
;
870 struct iscsi_login_req
*pdu
;
871 struct sockaddr_in sock_in
;
872 struct sockaddr_in6 sock_in6
;
874 flush_signals(current
);
875 sock
= np
->np_socket
;
877 spin_lock_bh(&np
->np_thread_lock
);
878 if (np
->np_thread_state
== ISCSI_NP_THREAD_RESET
) {
879 np
->np_thread_state
= ISCSI_NP_THREAD_ACTIVE
;
880 complete(&np
->np_restart_comp
);
882 np
->np_thread_state
= ISCSI_NP_THREAD_ACTIVE
;
884 spin_unlock_bh(&np
->np_thread_lock
);
886 if (kernel_accept(sock
, &new_sock
, 0) < 0) {
887 spin_lock_bh(&np
->np_thread_lock
);
888 if (np
->np_thread_state
== ISCSI_NP_THREAD_RESET
) {
889 spin_unlock_bh(&np
->np_thread_lock
);
890 complete(&np
->np_restart_comp
);
891 /* Get another socket */
894 spin_unlock_bh(&np
->np_thread_lock
);
897 iscsi_start_login_thread_timer(np
);
899 conn
= kzalloc(sizeof(struct iscsi_conn
), GFP_KERNEL
);
901 pr_err("Could not allocate memory for"
902 " new connection\n");
903 sock_release(new_sock
);
904 /* Get another socket */
908 pr_debug("Moving to TARG_CONN_STATE_FREE.\n");
909 conn
->conn_state
= TARG_CONN_STATE_FREE
;
910 conn
->sock
= new_sock
;
912 pr_debug("Moving to TARG_CONN_STATE_XPT_UP.\n");
913 conn
->conn_state
= TARG_CONN_STATE_XPT_UP
;
916 * Allocate conn->conn_ops early as a failure calling
917 * iscsit_tx_login_rsp() below will call tx_data().
919 conn
->conn_ops
= kzalloc(sizeof(struct iscsi_conn_ops
), GFP_KERNEL
);
920 if (!conn
->conn_ops
) {
921 pr_err("Unable to allocate memory for"
922 " struct iscsi_conn_ops.\n");
926 * Perform the remaining iSCSI connection initialization items..
928 if (iscsi_login_init_conn(conn
) < 0)
931 memset(buffer
, 0, ISCSI_HDR_LEN
);
932 memset(&iov
, 0, sizeof(struct kvec
));
933 iov
.iov_base
= buffer
;
934 iov
.iov_len
= ISCSI_HDR_LEN
;
936 if (rx_data(conn
, &iov
, 1, ISCSI_HDR_LEN
) <= 0) {
937 pr_err("rx_data() returned an error.\n");
941 iscsi_opcode
= (buffer
[0] & ISCSI_OPCODE_MASK
);
942 if (!(iscsi_opcode
& ISCSI_OP_LOGIN
)) {
943 pr_err("First opcode is not login request,"
944 " failing login request.\n");
948 pdu
= (struct iscsi_login_req
*) buffer
;
949 pdu
->cid
= be16_to_cpu(pdu
->cid
);
950 pdu
->tsih
= be16_to_cpu(pdu
->tsih
);
951 pdu
->itt
= be32_to_cpu(pdu
->itt
);
952 pdu
->cmdsn
= be32_to_cpu(pdu
->cmdsn
);
953 pdu
->exp_statsn
= be32_to_cpu(pdu
->exp_statsn
);
955 * Used by iscsit_tx_login_rsp() for Login Resonses PDUs
956 * when Status-Class != 0.
958 conn
->login_itt
= pdu
->itt
;
960 spin_lock_bh(&np
->np_thread_lock
);
961 if (np
->np_thread_state
!= ISCSI_NP_THREAD_ACTIVE
) {
962 spin_unlock_bh(&np
->np_thread_lock
);
963 pr_err("iSCSI Network Portal on %s:%hu currently not"
964 " active.\n", np
->np_ip
, np
->np_port
);
965 iscsit_tx_login_rsp(conn
, ISCSI_STATUS_CLS_TARGET_ERR
,
966 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE
);
969 spin_unlock_bh(&np
->np_thread_lock
);
971 if (np
->np_sockaddr
.ss_family
== AF_INET6
) {
972 memset(&sock_in6
, 0, sizeof(struct sockaddr_in6
));
974 if (conn
->sock
->ops
->getname(conn
->sock
,
975 (struct sockaddr
*)&sock_in6
, &err
, 1) < 0) {
976 pr_err("sock_ops->getname() failed.\n");
977 iscsit_tx_login_rsp(conn
, ISCSI_STATUS_CLS_TARGET_ERR
,
978 ISCSI_LOGIN_STATUS_TARGET_ERROR
);
981 snprintf(conn
->login_ip
, sizeof(conn
->login_ip
), "%pI6c",
982 &sock_in6
.sin6_addr
.in6_u
);
983 conn
->login_port
= ntohs(sock_in6
.sin6_port
);
985 if (conn
->sock
->ops
->getname(conn
->sock
,
986 (struct sockaddr
*)&sock_in6
, &err
, 0) < 0) {
987 pr_err("sock_ops->getname() failed.\n");
988 iscsit_tx_login_rsp(conn
, ISCSI_STATUS_CLS_TARGET_ERR
,
989 ISCSI_LOGIN_STATUS_TARGET_ERROR
);
992 snprintf(conn
->local_ip
, sizeof(conn
->local_ip
), "%pI6c",
993 &sock_in6
.sin6_addr
.in6_u
);
994 conn
->local_port
= ntohs(sock_in6
.sin6_port
);
997 memset(&sock_in
, 0, sizeof(struct sockaddr_in
));
999 if (conn
->sock
->ops
->getname(conn
->sock
,
1000 (struct sockaddr
*)&sock_in
, &err
, 1) < 0) {
1001 pr_err("sock_ops->getname() failed.\n");
1002 iscsit_tx_login_rsp(conn
, ISCSI_STATUS_CLS_TARGET_ERR
,
1003 ISCSI_LOGIN_STATUS_TARGET_ERROR
);
1006 sprintf(conn
->login_ip
, "%pI4", &sock_in
.sin_addr
.s_addr
);
1007 conn
->login_port
= ntohs(sock_in
.sin_port
);
1009 if (conn
->sock
->ops
->getname(conn
->sock
,
1010 (struct sockaddr
*)&sock_in
, &err
, 0) < 0) {
1011 pr_err("sock_ops->getname() failed.\n");
1012 iscsit_tx_login_rsp(conn
, ISCSI_STATUS_CLS_TARGET_ERR
,
1013 ISCSI_LOGIN_STATUS_TARGET_ERROR
);
1016 sprintf(conn
->local_ip
, "%pI4", &sock_in
.sin_addr
.s_addr
);
1017 conn
->local_port
= ntohs(sock_in
.sin_port
);
1020 conn
->network_transport
= np
->np_network_transport
;
1022 pr_debug("Received iSCSI login request from %s on %s Network"
1023 " Portal %s:%hu\n", conn
->login_ip
,
1024 (conn
->network_transport
== ISCSI_TCP
) ? "TCP" : "SCTP",
1025 conn
->local_ip
, conn
->local_port
);
1027 pr_debug("Moving to TARG_CONN_STATE_IN_LOGIN.\n");
1028 conn
->conn_state
= TARG_CONN_STATE_IN_LOGIN
;
1030 if (iscsi_login_check_initiator_version(conn
, pdu
->max_version
,
1031 pdu
->min_version
) < 0)
1034 zero_tsih
= (pdu
->tsih
== 0x0000);
1037 * This is the leading connection of a new session.
1038 * We wait until after authentication to check for
1039 * session reinstatement.
1041 if (iscsi_login_zero_tsih_s1(conn
, buffer
) < 0)
1045 * Add a new connection to an existing session.
1046 * We check for a non-existant session in
1047 * iscsi_login_non_zero_tsih_s2() below based
1048 * on ISID/TSIH, but wait until after authentication
1049 * to check for connection reinstatement, etc.
1051 if (iscsi_login_non_zero_tsih_s1(conn
, buffer
) < 0)
1056 * This will process the first login request, and call
1057 * iscsi_target_locate_portal(), and return a valid struct iscsi_login.
1059 login
= iscsi_target_init_negotiation(np
, conn
, buffer
);
1067 pr_err("Unable to locate struct iscsi_conn->tpg\n");
1072 if (iscsi_login_zero_tsih_s2(conn
) < 0) {
1073 iscsi_target_nego_release(login
, conn
);
1077 if (iscsi_login_non_zero_tsih_s2(conn
, buffer
) < 0) {
1078 iscsi_target_nego_release(login
, conn
);
1083 if (iscsi_target_start_negotiation(login
, conn
) < 0)
1087 pr_err("struct iscsi_conn session pointer is NULL!\n");
1091 iscsi_stop_login_thread_timer(np
);
1093 if (signal_pending(current
))
1096 ret
= iscsi_post_login_handler(np
, conn
, zero_tsih
);
1101 iscsit_deaccess_np(np
, tpg
);
1103 /* Get another socket */
1107 pr_err("iSCSI Login negotiation failed.\n");
1108 iscsit_collect_login_stats(conn
, ISCSI_STATUS_CLS_INITIATOR_ERR
,
1109 ISCSI_LOGIN_STATUS_INIT_ERR
);
1110 if (!zero_tsih
|| !conn
->sess
)
1112 if (conn
->sess
->se_sess
)
1113 transport_free_session(conn
->sess
->se_sess
);
1114 if (conn
->sess
->session_index
!= 0) {
1115 spin_lock_bh(&sess_idr_lock
);
1116 idr_remove(&sess_idr
, conn
->sess
->session_index
);
1117 spin_unlock_bh(&sess_idr_lock
);
1119 if (conn
->sess
->sess_ops
)
1120 kfree(conn
->sess
->sess_ops
);
1124 iscsi_stop_login_thread_timer(np
);
1126 * If login negotiation fails check if the Time2Retain timer
1127 * needs to be restarted.
1129 if (!zero_tsih
&& conn
->sess
) {
1130 spin_lock_bh(&conn
->sess
->conn_lock
);
1131 if (conn
->sess
->session_state
== TARG_SESS_STATE_FAILED
) {
1132 struct se_portal_group
*se_tpg
=
1133 &ISCSI_TPG_C(conn
)->tpg_se_tpg
;
1135 atomic_set(&conn
->sess
->session_continuation
, 0);
1136 spin_unlock_bh(&conn
->sess
->conn_lock
);
1137 spin_lock_bh(&se_tpg
->session_lock
);
1138 iscsit_start_time2retain_handler(conn
->sess
);
1139 spin_unlock_bh(&se_tpg
->session_lock
);
1141 spin_unlock_bh(&conn
->sess
->conn_lock
);
1142 iscsit_dec_session_usage_count(conn
->sess
);
1145 if (!IS_ERR(conn
->conn_rx_hash
.tfm
))
1146 crypto_free_hash(conn
->conn_rx_hash
.tfm
);
1147 if (!IS_ERR(conn
->conn_tx_hash
.tfm
))
1148 crypto_free_hash(conn
->conn_tx_hash
.tfm
);
1150 if (conn
->conn_cpumask
)
1151 free_cpumask_var(conn
->conn_cpumask
);
1153 kfree(conn
->conn_ops
);
1155 if (conn
->param_list
) {
1156 iscsi_release_param_list(conn
->param_list
);
1157 conn
->param_list
= NULL
;
1160 sock_release(conn
->sock
);
1164 iscsit_deaccess_np(np
, tpg
);
1169 stop
= kthread_should_stop();
1170 if (!stop
&& signal_pending(current
)) {
1171 spin_lock_bh(&np
->np_thread_lock
);
1172 stop
= (np
->np_thread_state
== ISCSI_NP_THREAD_SHUTDOWN
);
1173 spin_unlock_bh(&np
->np_thread_lock
);
1175 /* Wait for another socket.. */
1179 iscsi_stop_login_thread_timer(np
);
1180 spin_lock_bh(&np
->np_thread_lock
);
1181 np
->np_thread_state
= ISCSI_NP_THREAD_EXIT
;
1182 spin_unlock_bh(&np
->np_thread_lock
);
1186 int iscsi_target_login_thread(void *arg
)
1188 struct iscsi_np
*np
= arg
;
1191 allow_signal(SIGINT
);
1193 while (!kthread_should_stop()) {
1194 ret
= __iscsi_target_login_thread(np
);
1196 * We break and exit here unless another sock_accept() call