1 /*******************************************************************************
2 * This file contains main functions related to iSCSI Parameter negotiation.
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/ctype.h>
22 #include <scsi/iscsi_proto.h>
23 #include <target/target_core_base.h>
24 #include <target/target_core_tpg.h>
26 #include "iscsi_target_core.h"
27 #include "iscsi_target_parameters.h"
28 #include "iscsi_target_login.h"
29 #include "iscsi_target_nego.h"
30 #include "iscsi_target_tpg.h"
31 #include "iscsi_target_util.h"
32 #include "iscsi_target.h"
33 #include "iscsi_target_auth.h"
35 #define MAX_LOGIN_PDUS 7
38 void convert_null_to_semi(char *buf, int len)
42 for (i = 0; i < len; i++)
47 int strlen_semi(char *buf)
51 while (buf[i] != '\0') {
63 unsigned int max_length,
70 if (!in_buf || !pattern || !out_buf || !type)
73 ptr = strstr(in_buf, pattern);
77 ptr = strstr(ptr, "=");
82 if (*ptr == '0' && (*(ptr+1) == 'x' || *(ptr+1) == 'X')) {
83 ptr += 2; /* skip 0x */
88 len = strlen_semi(ptr);
92 if (len >= max_length) {
93 pr_err("Length of input: %d exeeds max_length:"
94 " %d\n", len, max_length);
97 memcpy(out_buf, ptr, len);
103 static u32 iscsi_handle_authentication(
104 struct iscsi_conn *conn,
109 unsigned char *authtype)
111 struct iscsi_session *sess = conn->sess;
112 struct iscsi_node_auth *auth;
113 struct iscsi_node_acl *iscsi_nacl;
114 struct se_node_acl *se_nacl;
116 if (!sess->sess_ops->SessionType) {
118 * For SessionType=Normal
120 se_nacl = conn->sess->se_sess->se_node_acl;
122 pr_err("Unable to locate struct se_node_acl for"
126 iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl,
129 pr_err("Unable to locate struct iscsi_node_acl for"
134 auth = ISCSI_NODE_AUTH(iscsi_nacl);
137 * For SessionType=Discovery
139 auth = &iscsit_global->discovery_acl.node_auth;
142 if (strstr("CHAP", authtype))
143 strcpy(conn->sess->auth_type, "CHAP");
145 strcpy(conn->sess->auth_type, NONE);
147 if (strstr("None", authtype))
150 else if (strstr("SRP", authtype))
151 return srp_main_loop(conn, auth, in_buf, out_buf,
152 &in_length, out_length);
154 else if (strstr("CHAP", authtype))
155 return chap_main_loop(conn, auth, in_buf, out_buf,
156 &in_length, out_length);
157 else if (strstr("SPKM1", authtype))
159 else if (strstr("SPKM2", authtype))
161 else if (strstr("KRB5", authtype))
167 static void iscsi_remove_failed_auth_entry(struct iscsi_conn *conn)
169 kfree(conn->auth_protocol);
172 static int iscsi_target_check_login_request(
173 struct iscsi_conn *conn,
174 struct iscsi_login *login)
176 int req_csg, req_nsg, rsp_csg, rsp_nsg;
178 struct iscsi_login_req *login_req;
179 struct iscsi_login_rsp *login_rsp;
181 login_req = (struct iscsi_login_req *) login->req;
182 login_rsp = (struct iscsi_login_rsp *) login->rsp;
183 payload_length = ntoh24(login_req->dlength);
185 switch (login_req->opcode & ISCSI_OPCODE_MASK) {
189 pr_err("Received unknown opcode 0x%02x.\n",
190 login_req->opcode & ISCSI_OPCODE_MASK);
191 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
192 ISCSI_LOGIN_STATUS_INIT_ERR);
196 if ((login_req->flags & ISCSI_FLAG_LOGIN_CONTINUE) &&
197 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
198 pr_err("Login request has both ISCSI_FLAG_LOGIN_CONTINUE"
199 " and ISCSI_FLAG_LOGIN_TRANSIT set, protocol error.\n");
200 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
201 ISCSI_LOGIN_STATUS_INIT_ERR);
205 req_csg = (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2;
206 rsp_csg = (login_rsp->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2;
207 req_nsg = (login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK);
208 rsp_nsg = (login_rsp->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK);
210 if (req_csg != login->current_stage) {
211 pr_err("Initiator unexpectedly changed login stage"
212 " from %d to %d, login failed.\n", login->current_stage,
214 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
215 ISCSI_LOGIN_STATUS_INIT_ERR);
219 if ((req_nsg == 2) || (req_csg >= 2) ||
220 ((login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT) &&
221 (req_nsg <= req_csg))) {
222 pr_err("Illegal login_req->flags Combination, CSG: %d,"
223 " NSG: %d, ISCSI_FLAG_LOGIN_TRANSIT: %d.\n", req_csg,
224 req_nsg, (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT));
225 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
226 ISCSI_LOGIN_STATUS_INIT_ERR);
230 if ((login_req->max_version != login->version_max) ||
231 (login_req->min_version != login->version_min)) {
232 pr_err("Login request changed Version Max/Nin"
233 " unexpectedly to 0x%02x/0x%02x, protocol error\n",
234 login_req->max_version, login_req->min_version);
235 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
236 ISCSI_LOGIN_STATUS_INIT_ERR);
240 if (memcmp(login_req->isid, login->isid, 6) != 0) {
241 pr_err("Login request changed ISID unexpectedly,"
242 " protocol error.\n");
243 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
244 ISCSI_LOGIN_STATUS_INIT_ERR);
248 if (login_req->itt != login->init_task_tag) {
249 pr_err("Login request changed ITT unexpectedly to"
250 " 0x%08x, protocol error.\n", login_req->itt);
251 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
252 ISCSI_LOGIN_STATUS_INIT_ERR);
256 if (payload_length > MAX_KEY_VALUE_PAIRS) {
257 pr_err("Login request payload exceeds default"
258 " MaxRecvDataSegmentLength: %u, protocol error.\n",
259 MAX_KEY_VALUE_PAIRS);
266 static int iscsi_target_check_first_request(
267 struct iscsi_conn *conn,
268 struct iscsi_login *login)
270 struct iscsi_param *param = NULL;
271 struct se_node_acl *se_nacl;
273 login->first_request = 0;
275 list_for_each_entry(param, &conn->param_list->param_list, p_list) {
276 if (!strncmp(param->name, SESSIONTYPE, 11)) {
277 if (!IS_PSTATE_ACCEPTOR(param)) {
278 pr_err("SessionType key not received"
279 " in first login request.\n");
280 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
281 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
284 if (!strncmp(param->value, DISCOVERY, 9))
288 if (!strncmp(param->name, INITIATORNAME, 13)) {
289 if (!IS_PSTATE_ACCEPTOR(param)) {
290 if (!login->leading_connection)
293 pr_err("InitiatorName key not received"
294 " in first login request.\n");
295 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
296 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
301 * For non-leading connections, double check that the
302 * received InitiatorName matches the existing session's
303 * struct iscsi_node_acl.
305 if (!login->leading_connection) {
306 se_nacl = conn->sess->se_sess->se_node_acl;
308 pr_err("Unable to locate"
309 " struct se_node_acl\n");
310 iscsit_tx_login_rsp(conn,
311 ISCSI_STATUS_CLS_INITIATOR_ERR,
312 ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
316 if (strcmp(param->value,
317 se_nacl->initiatorname)) {
319 " InitiatorName: %s for this"
320 " iSCSI Initiator Node.\n",
322 iscsit_tx_login_rsp(conn,
323 ISCSI_STATUS_CLS_INITIATOR_ERR,
324 ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
334 static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
337 struct iscsi_session *sess = conn->sess;
338 struct iscsi_login_rsp *login_rsp;
340 login_rsp = (struct iscsi_login_rsp *) login->rsp;
342 login_rsp->opcode = ISCSI_OP_LOGIN_RSP;
343 hton24(login_rsp->dlength, login->rsp_length);
344 memcpy(login_rsp->isid, login->isid, 6);
345 login_rsp->tsih = cpu_to_be16(login->tsih);
346 login_rsp->itt = cpu_to_be32(login->init_task_tag);
347 login_rsp->statsn = cpu_to_be32(conn->stat_sn++);
348 login_rsp->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
349 login_rsp->max_cmdsn = cpu_to_be32(conn->sess->max_cmd_sn);
351 pr_debug("Sending Login Response, Flags: 0x%02x, ITT: 0x%08x,"
352 " ExpCmdSN; 0x%08x, MaxCmdSN: 0x%08x, StatSN: 0x%08x, Length:"
353 " %u\n", login_rsp->flags, ntohl(login_rsp->itt),
354 ntohl(login_rsp->exp_cmdsn), ntohl(login_rsp->max_cmdsn),
355 ntohl(login_rsp->statsn), login->rsp_length);
357 padding = ((-login->rsp_length) & 3);
359 if (iscsi_login_tx_data(
363 login->rsp_length + padding) < 0)
366 login->rsp_length = 0;
367 login_rsp->tsih = be16_to_cpu(login_rsp->tsih);
368 login_rsp->itt = be32_to_cpu(login_rsp->itt);
369 login_rsp->statsn = be32_to_cpu(login_rsp->statsn);
370 mutex_lock(&sess->cmdsn_mutex);
371 login_rsp->exp_cmdsn = be32_to_cpu(sess->exp_cmd_sn);
372 login_rsp->max_cmdsn = be32_to_cpu(sess->max_cmd_sn);
373 mutex_unlock(&sess->cmdsn_mutex);
378 static int iscsi_target_do_rx_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
380 u32 padding = 0, payload_length;
381 struct iscsi_login_req *login_req;
383 if (iscsi_login_rx_data(conn, login->req, ISCSI_HDR_LEN) < 0)
386 login_req = (struct iscsi_login_req *) login->req;
387 payload_length = ntoh24(login_req->dlength);
388 login_req->tsih = be16_to_cpu(login_req->tsih);
389 login_req->itt = be32_to_cpu(login_req->itt);
390 login_req->cid = be16_to_cpu(login_req->cid);
391 login_req->cmdsn = be32_to_cpu(login_req->cmdsn);
392 login_req->exp_statsn = be32_to_cpu(login_req->exp_statsn);
394 pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
395 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, CID: %hu, Length: %u\n",
396 login_req->flags, login_req->itt, login_req->cmdsn,
397 login_req->exp_statsn, login_req->cid, payload_length);
399 if (iscsi_target_check_login_request(conn, login) < 0)
402 padding = ((-payload_length) & 3);
403 memset(login->req_buf, 0, MAX_KEY_VALUE_PAIRS);
405 if (iscsi_login_rx_data(
408 payload_length + padding) < 0)
414 static int iscsi_target_do_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
416 if (iscsi_target_do_tx_login_io(conn, login) < 0)
419 if (iscsi_target_do_rx_login_io(conn, login) < 0)
425 static int iscsi_target_get_initial_payload(
426 struct iscsi_conn *conn,
427 struct iscsi_login *login)
429 u32 padding = 0, payload_length;
430 struct iscsi_login_req *login_req;
432 login_req = (struct iscsi_login_req *) login->req;
433 payload_length = ntoh24(login_req->dlength);
435 pr_debug("Got Login Command, Flags 0x%02x, ITT: 0x%08x,"
436 " CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
437 login_req->flags, login_req->itt, login_req->cmdsn,
438 login_req->exp_statsn, payload_length);
440 if (iscsi_target_check_login_request(conn, login) < 0)
443 padding = ((-payload_length) & 3);
445 if (iscsi_login_rx_data(
448 payload_length + padding) < 0)
455 * NOTE: We check for existing sessions or connections AFTER the initiator
456 * has been successfully authenticated in order to protect against faked
457 * ISID/TSIH combinations.
459 static int iscsi_target_check_for_existing_instances(
460 struct iscsi_conn *conn,
461 struct iscsi_login *login)
463 if (login->checked_for_existing)
466 login->checked_for_existing = 1;
469 return iscsi_check_for_session_reinstatement(conn);
471 return iscsi_login_post_auth_non_zero_tsih(conn, login->cid,
472 login->initial_exp_statsn);
475 static int iscsi_target_do_authentication(
476 struct iscsi_conn *conn,
477 struct iscsi_login *login)
481 struct iscsi_param *param;
482 struct iscsi_login_req *login_req;
483 struct iscsi_login_rsp *login_rsp;
485 login_req = (struct iscsi_login_req *) login->req;
486 login_rsp = (struct iscsi_login_rsp *) login->rsp;
487 payload_length = ntoh24(login_req->dlength);
489 param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
493 authret = iscsi_handle_authentication(
502 pr_debug("Received OK response"
503 " from LIO Authentication, continuing.\n");
506 pr_debug("iSCSI security negotiation"
507 " completed successfully.\n");
508 login->auth_complete = 1;
509 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
510 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
511 login_rsp->flags |= (ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
512 ISCSI_FLAG_LOGIN_TRANSIT);
513 login->current_stage = 1;
515 return iscsi_target_check_for_existing_instances(
518 pr_err("Security negotiation"
520 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
521 ISCSI_LOGIN_STATUS_AUTH_FAILED);
524 pr_err("Received unknown error %d from LIO"
525 " Authentication\n", authret);
526 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
527 ISCSI_LOGIN_STATUS_TARGET_ERROR);
534 static int iscsi_target_handle_csg_zero(
535 struct iscsi_conn *conn,
536 struct iscsi_login *login)
540 struct iscsi_param *param;
541 struct iscsi_login_req *login_req;
542 struct iscsi_login_rsp *login_rsp;
544 login_req = (struct iscsi_login_req *) login->req;
545 login_rsp = (struct iscsi_login_rsp *) login->rsp;
546 payload_length = ntoh24(login_req->dlength);
548 param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
552 ret = iscsi_decode_text_input(
553 PHASE_SECURITY|PHASE_DECLARATIVE,
554 SENDER_INITIATOR|SENDER_RECEIVER,
562 if (login->auth_complete) {
563 pr_err("Initiator has already been"
564 " successfully authenticated, but is still"
565 " sending %s keys.\n", param->value);
566 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
567 ISCSI_LOGIN_STATUS_INIT_ERR);
574 if (login->first_request)
575 if (iscsi_target_check_first_request(conn, login) < 0)
578 ret = iscsi_encode_text_output(
579 PHASE_SECURITY|PHASE_DECLARATIVE,
587 if (!iscsi_check_negotiated_keys(conn->param_list)) {
588 if (ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication &&
589 !strncmp(param->value, NONE, 4)) {
590 pr_err("Initiator sent AuthMethod=None but"
591 " Target is enforcing iSCSI Authentication,"
593 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
594 ISCSI_LOGIN_STATUS_AUTH_FAILED);
598 if (ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication &&
599 !login->auth_complete)
602 if (strncmp(param->value, NONE, 4) && !login->auth_complete)
605 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
606 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
607 login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
608 ISCSI_FLAG_LOGIN_TRANSIT;
609 login->current_stage = 1;
615 return iscsi_target_do_authentication(conn, login);
618 static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_login *login)
622 struct iscsi_login_req *login_req;
623 struct iscsi_login_rsp *login_rsp;
625 login_req = (struct iscsi_login_req *) login->req;
626 login_rsp = (struct iscsi_login_rsp *) login->rsp;
627 payload_length = ntoh24(login_req->dlength);
629 ret = iscsi_decode_text_input(
630 PHASE_OPERATIONAL|PHASE_DECLARATIVE,
631 SENDER_INITIATOR|SENDER_RECEIVER,
636 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
637 ISCSI_LOGIN_STATUS_INIT_ERR);
641 if (login->first_request)
642 if (iscsi_target_check_first_request(conn, login) < 0)
645 if (iscsi_target_check_for_existing_instances(conn, login) < 0)
648 ret = iscsi_encode_text_output(
649 PHASE_OPERATIONAL|PHASE_DECLARATIVE,
655 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
656 ISCSI_LOGIN_STATUS_INIT_ERR);
660 if (!login->auth_complete &&
661 ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication) {
662 pr_err("Initiator is requesting CSG: 1, has not been"
663 " successfully authenticated, and the Target is"
664 " enforcing iSCSI Authentication, login failed.\n");
665 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
666 ISCSI_LOGIN_STATUS_AUTH_FAILED);
670 if (!iscsi_check_negotiated_keys(conn->param_list))
671 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE3) &&
672 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT))
673 login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE3 |
674 ISCSI_FLAG_LOGIN_TRANSIT;
679 static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *login)
682 struct iscsi_login_req *login_req;
683 struct iscsi_login_rsp *login_rsp;
685 login_req = (struct iscsi_login_req *) login->req;
686 login_rsp = (struct iscsi_login_rsp *) login->rsp;
689 if (++pdu_count > MAX_LOGIN_PDUS) {
690 pr_err("MAX_LOGIN_PDUS count reached.\n");
691 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
692 ISCSI_LOGIN_STATUS_TARGET_ERROR);
696 switch ((login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2) {
698 login_rsp->flags |= (0 & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK);
699 if (iscsi_target_handle_csg_zero(conn, login) < 0)
703 login_rsp->flags |= ISCSI_FLAG_LOGIN_CURRENT_STAGE1;
704 if (iscsi_target_handle_csg_one(conn, login) < 0)
706 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
707 login->tsih = conn->sess->tsih;
708 if (iscsi_target_do_tx_login_io(conn,
715 pr_err("Illegal CSG: %d received from"
716 " Initiator, protocol error.\n",
717 (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK)
722 if (iscsi_target_do_login_io(conn, login) < 0)
725 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
726 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_TRANSIT;
727 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK;
734 static void iscsi_initiatorname_tolower(
738 u32 iqn_size = strlen(param_buf), i;
740 for (i = 0; i < iqn_size; i++) {
741 c = (char *)¶m_buf[i];
750 * Processes the first Login Request..
752 static int iscsi_target_locate_portal(
754 struct iscsi_conn *conn,
755 struct iscsi_login *login)
757 char *i_buf = NULL, *s_buf = NULL, *t_buf = NULL;
758 char *tmpbuf, *start = NULL, *end = NULL, *key, *value;
759 struct iscsi_session *sess = conn->sess;
760 struct iscsi_tiqn *tiqn;
761 struct iscsi_login_req *login_req;
762 struct iscsi_targ_login_rsp *login_rsp;
764 int sessiontype = 0, ret = 0;
766 login_req = (struct iscsi_login_req *) login->req;
767 login_rsp = (struct iscsi_targ_login_rsp *) login->rsp;
768 payload_length = ntoh24(login_req->dlength);
770 login->first_request = 1;
771 login->leading_connection = (!login_req->tsih) ? 1 : 0;
772 login->current_stage =
773 (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2;
774 login->version_min = login_req->min_version;
775 login->version_max = login_req->max_version;
776 memcpy(login->isid, login_req->isid, 6);
777 login->cmd_sn = login_req->cmdsn;
778 login->init_task_tag = login_req->itt;
779 login->initial_exp_statsn = login_req->exp_statsn;
780 login->cid = login_req->cid;
781 login->tsih = login_req->tsih;
783 if (iscsi_target_get_initial_payload(conn, login) < 0)
786 tmpbuf = kzalloc(payload_length + 1, GFP_KERNEL);
788 pr_err("Unable to allocate memory for tmpbuf.\n");
792 memcpy(tmpbuf, login->req_buf, payload_length);
793 tmpbuf[payload_length] = '\0';
795 end = (start + payload_length);
798 * Locate the initial keys expected from the Initiator node in
799 * the first login request in order to progress with the login phase.
801 while (start < end) {
802 if (iscsi_extract_key_value(start, &key, &value) < 0) {
807 if (!strncmp(key, "InitiatorName", 13))
809 else if (!strncmp(key, "SessionType", 11))
811 else if (!strncmp(key, "TargetName", 10))
814 start += strlen(key) + strlen(value) + 2;
818 * See 5.3. Login Phase.
821 pr_err("InitiatorName key not received"
822 " in first login request.\n");
823 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
824 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
829 * Convert the incoming InitiatorName to lowercase following
830 * RFC-3720 3.2.6.1. section c) that says that iSCSI IQNs
831 * are NOT case sensitive.
833 iscsi_initiatorname_tolower(i_buf);
836 if (!login->leading_connection)
839 pr_err("SessionType key not received"
840 " in first login request.\n");
841 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
842 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
848 * Use default portal group for discovery sessions.
850 sessiontype = strncmp(s_buf, DISCOVERY, 9);
852 conn->tpg = iscsit_global->discovery_tpg;
853 if (!login->leading_connection)
856 sess->sess_ops->SessionType = 1;
858 * Setup crc32c modules from libcrypto
860 if (iscsi_login_setup_crypto(conn) < 0) {
861 pr_err("iscsi_login_setup_crypto() failed\n");
866 * Serialize access across the discovery struct iscsi_portal_group to
867 * process login attempt.
869 if (iscsit_access_np(np, conn->tpg) < 0) {
870 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
871 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
881 pr_err("TargetName key not received"
882 " in first login request while"
883 " SessionType=Normal.\n");
884 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
885 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
891 * Locate Target IQN from Storage Node.
893 tiqn = iscsit_get_tiqn_for_login(t_buf);
895 pr_err("Unable to locate Target IQN: %s in"
896 " Storage Node\n", t_buf);
897 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
898 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
902 pr_debug("Located Storage Object: %s\n", tiqn->tiqn);
905 * Locate Target Portal Group from Storage Node.
907 conn->tpg = iscsit_get_tpg_from_np(tiqn, np);
909 pr_err("Unable to locate Target Portal Group"
910 " on %s\n", tiqn->tiqn);
911 iscsit_put_tiqn_for_login(tiqn);
912 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
913 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
917 pr_debug("Located Portal Group Object: %hu\n", conn->tpg->tpgt);
919 * Setup crc32c modules from libcrypto
921 if (iscsi_login_setup_crypto(conn) < 0) {
922 pr_err("iscsi_login_setup_crypto() failed\n");
927 * Serialize access across the struct iscsi_portal_group to
928 * process login attempt.
930 if (iscsit_access_np(np, conn->tpg) < 0) {
931 iscsit_put_tiqn_for_login(tiqn);
932 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
933 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
940 * conn->sess->node_acl will be set when the referenced
941 * struct iscsi_session is located from received ISID+TSIH in
942 * iscsi_login_non_zero_tsih_s2().
944 if (!login->leading_connection) {
950 * This value is required in iscsi_login_zero_tsih_s2()
952 sess->sess_ops->SessionType = 0;
955 * Locate incoming Initiator IQN reference from Storage Node.
957 sess->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
958 &conn->tpg->tpg_se_tpg, i_buf);
959 if (!sess->se_sess->se_node_acl) {
960 pr_err("iSCSI Initiator Node: %s is not authorized to"
961 " access iSCSI target portal group: %hu.\n",
962 i_buf, conn->tpg->tpgt);
963 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
964 ISCSI_LOGIN_STATUS_TGT_FORBIDDEN);
975 struct iscsi_login *iscsi_target_init_negotiation(
977 struct iscsi_conn *conn,
980 struct iscsi_login *login;
982 login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
984 pr_err("Unable to allocate memory for struct iscsi_login.\n");
985 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
986 ISCSI_LOGIN_STATUS_NO_RESOURCES);
990 login->req = kmemdup(login_pdu, ISCSI_HDR_LEN, GFP_KERNEL);
992 pr_err("Unable to allocate memory for Login Request.\n");
993 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
994 ISCSI_LOGIN_STATUS_NO_RESOURCES);
998 login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
999 if (!login->req_buf) {
1000 pr_err("Unable to allocate memory for response buffer.\n");
1001 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1002 ISCSI_LOGIN_STATUS_NO_RESOURCES);
1006 * SessionType: Discovery
1008 * Locates Default Portal
1010 * SessionType: Normal
1012 * Locates Target Portal from NP -> Target IQN
1014 if (iscsi_target_locate_portal(np, conn, login) < 0) {
1015 pr_err("iSCSI Login negotiation failed.\n");
1022 kfree(login->req_buf);
1028 int iscsi_target_start_negotiation(
1029 struct iscsi_login *login,
1030 struct iscsi_conn *conn)
1034 login->rsp = kzalloc(ISCSI_HDR_LEN, GFP_KERNEL);
1036 pr_err("Unable to allocate memory for"
1037 " Login Response.\n");
1038 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1039 ISCSI_LOGIN_STATUS_NO_RESOURCES);
1044 login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
1045 if (!login->rsp_buf) {
1046 pr_err("Unable to allocate memory for"
1047 " request buffer.\n");
1048 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1049 ISCSI_LOGIN_STATUS_NO_RESOURCES);
1054 ret = iscsi_target_do_login(conn, login);
1057 iscsi_remove_failed_auth_entry(conn);
1059 iscsi_target_nego_release(login, conn);
1063 void iscsi_target_nego_release(
1064 struct iscsi_login *login,
1065 struct iscsi_conn *conn)
1069 kfree(login->req_buf);
1070 kfree(login->rsp_buf);