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,
638 if (login->first_request)
639 if (iscsi_target_check_first_request(conn, login) < 0)
642 if (iscsi_target_check_for_existing_instances(conn, login) < 0)
645 ret = iscsi_encode_text_output(
646 PHASE_OPERATIONAL|PHASE_DECLARATIVE,
654 if (!login->auth_complete &&
655 ISCSI_TPG_ATTRIB(ISCSI_TPG_C(conn))->authentication) {
656 pr_err("Initiator is requesting CSG: 1, has not been"
657 " successfully authenticated, and the Target is"
658 " enforcing iSCSI Authentication, login failed.\n");
659 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
660 ISCSI_LOGIN_STATUS_AUTH_FAILED);
664 if (!iscsi_check_negotiated_keys(conn->param_list))
665 if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE3) &&
666 (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT))
667 login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE3 |
668 ISCSI_FLAG_LOGIN_TRANSIT;
673 static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *login)
676 struct iscsi_login_req *login_req;
677 struct iscsi_login_rsp *login_rsp;
679 login_req = (struct iscsi_login_req *) login->req;
680 login_rsp = (struct iscsi_login_rsp *) login->rsp;
683 if (++pdu_count > MAX_LOGIN_PDUS) {
684 pr_err("MAX_LOGIN_PDUS count reached.\n");
685 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
686 ISCSI_LOGIN_STATUS_TARGET_ERROR);
690 switch ((login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2) {
692 login_rsp->flags |= (0 & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK);
693 if (iscsi_target_handle_csg_zero(conn, login) < 0)
697 login_rsp->flags |= ISCSI_FLAG_LOGIN_CURRENT_STAGE1;
698 if (iscsi_target_handle_csg_one(conn, login) < 0)
700 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
701 login->tsih = conn->sess->tsih;
702 if (iscsi_target_do_tx_login_io(conn,
709 pr_err("Illegal CSG: %d received from"
710 " Initiator, protocol error.\n",
711 (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK)
716 if (iscsi_target_do_login_io(conn, login) < 0)
719 if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
720 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_TRANSIT;
721 login_rsp->flags &= ~ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK;
728 static void iscsi_initiatorname_tolower(
732 u32 iqn_size = strlen(param_buf), i;
734 for (i = 0; i < iqn_size; i++) {
735 c = (char *)¶m_buf[i];
744 * Processes the first Login Request..
746 static int iscsi_target_locate_portal(
748 struct iscsi_conn *conn,
749 struct iscsi_login *login)
751 char *i_buf = NULL, *s_buf = NULL, *t_buf = NULL;
752 char *tmpbuf, *start = NULL, *end = NULL, *key, *value;
753 struct iscsi_session *sess = conn->sess;
754 struct iscsi_tiqn *tiqn;
755 struct iscsi_login_req *login_req;
756 struct iscsi_targ_login_rsp *login_rsp;
758 int sessiontype = 0, ret = 0;
760 login_req = (struct iscsi_login_req *) login->req;
761 login_rsp = (struct iscsi_targ_login_rsp *) login->rsp;
762 payload_length = ntoh24(login_req->dlength);
764 login->first_request = 1;
765 login->leading_connection = (!login_req->tsih) ? 1 : 0;
766 login->current_stage =
767 (login_req->flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2;
768 login->version_min = login_req->min_version;
769 login->version_max = login_req->max_version;
770 memcpy(login->isid, login_req->isid, 6);
771 login->cmd_sn = login_req->cmdsn;
772 login->init_task_tag = login_req->itt;
773 login->initial_exp_statsn = login_req->exp_statsn;
774 login->cid = login_req->cid;
775 login->tsih = login_req->tsih;
777 if (iscsi_target_get_initial_payload(conn, login) < 0)
780 tmpbuf = kzalloc(payload_length + 1, GFP_KERNEL);
782 pr_err("Unable to allocate memory for tmpbuf.\n");
786 memcpy(tmpbuf, login->req_buf, payload_length);
787 tmpbuf[payload_length] = '\0';
789 end = (start + payload_length);
792 * Locate the initial keys expected from the Initiator node in
793 * the first login request in order to progress with the login phase.
795 while (start < end) {
796 if (iscsi_extract_key_value(start, &key, &value) < 0) {
801 if (!strncmp(key, "InitiatorName", 13))
803 else if (!strncmp(key, "SessionType", 11))
805 else if (!strncmp(key, "TargetName", 10))
808 start += strlen(key) + strlen(value) + 2;
812 * See 5.3. Login Phase.
815 pr_err("InitiatorName key not received"
816 " in first login request.\n");
817 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
818 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
823 * Convert the incoming InitiatorName to lowercase following
824 * RFC-3720 3.2.6.1. section c) that says that iSCSI IQNs
825 * are NOT case sensitive.
827 iscsi_initiatorname_tolower(i_buf);
830 if (!login->leading_connection)
833 pr_err("SessionType key not received"
834 " in first login request.\n");
835 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
836 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
842 * Use default portal group for discovery sessions.
844 sessiontype = strncmp(s_buf, DISCOVERY, 9);
846 conn->tpg = iscsit_global->discovery_tpg;
847 if (!login->leading_connection)
850 sess->sess_ops->SessionType = 1;
852 * Setup crc32c modules from libcrypto
854 if (iscsi_login_setup_crypto(conn) < 0) {
855 pr_err("iscsi_login_setup_crypto() failed\n");
860 * Serialize access across the discovery struct iscsi_portal_group to
861 * process login attempt.
863 if (iscsit_access_np(np, conn->tpg) < 0) {
864 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
865 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
875 pr_err("TargetName key not received"
876 " in first login request while"
877 " SessionType=Normal.\n");
878 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
879 ISCSI_LOGIN_STATUS_MISSING_FIELDS);
885 * Locate Target IQN from Storage Node.
887 tiqn = iscsit_get_tiqn_for_login(t_buf);
889 pr_err("Unable to locate Target IQN: %s in"
890 " Storage Node\n", t_buf);
891 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
892 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
896 pr_debug("Located Storage Object: %s\n", tiqn->tiqn);
899 * Locate Target Portal Group from Storage Node.
901 conn->tpg = iscsit_get_tpg_from_np(tiqn, np);
903 pr_err("Unable to locate Target Portal Group"
904 " on %s\n", tiqn->tiqn);
905 iscsit_put_tiqn_for_login(tiqn);
906 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
907 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
911 pr_debug("Located Portal Group Object: %hu\n", conn->tpg->tpgt);
913 * Setup crc32c modules from libcrypto
915 if (iscsi_login_setup_crypto(conn) < 0) {
916 pr_err("iscsi_login_setup_crypto() failed\n");
921 * Serialize access across the struct iscsi_portal_group to
922 * process login attempt.
924 if (iscsit_access_np(np, conn->tpg) < 0) {
925 iscsit_put_tiqn_for_login(tiqn);
926 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
927 ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
934 * conn->sess->node_acl will be set when the referenced
935 * struct iscsi_session is located from received ISID+TSIH in
936 * iscsi_login_non_zero_tsih_s2().
938 if (!login->leading_connection) {
944 * This value is required in iscsi_login_zero_tsih_s2()
946 sess->sess_ops->SessionType = 0;
949 * Locate incoming Initiator IQN reference from Storage Node.
951 sess->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
952 &conn->tpg->tpg_se_tpg, i_buf);
953 if (!sess->se_sess->se_node_acl) {
954 pr_err("iSCSI Initiator Node: %s is not authorized to"
955 " access iSCSI target portal group: %hu.\n",
956 i_buf, conn->tpg->tpgt);
957 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
958 ISCSI_LOGIN_STATUS_TGT_FORBIDDEN);
969 struct iscsi_login *iscsi_target_init_negotiation(
971 struct iscsi_conn *conn,
974 struct iscsi_login *login;
976 login = kzalloc(sizeof(struct iscsi_login), GFP_KERNEL);
978 pr_err("Unable to allocate memory for struct iscsi_login.\n");
979 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
980 ISCSI_LOGIN_STATUS_NO_RESOURCES);
984 login->req = kmemdup(login_pdu, ISCSI_HDR_LEN, GFP_KERNEL);
986 pr_err("Unable to allocate memory for Login Request.\n");
987 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
988 ISCSI_LOGIN_STATUS_NO_RESOURCES);
992 login->req_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
993 if (!login->req_buf) {
994 pr_err("Unable to allocate memory for response buffer.\n");
995 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
996 ISCSI_LOGIN_STATUS_NO_RESOURCES);
1000 * SessionType: Discovery
1002 * Locates Default Portal
1004 * SessionType: Normal
1006 * Locates Target Portal from NP -> Target IQN
1008 if (iscsi_target_locate_portal(np, conn, login) < 0) {
1009 pr_err("iSCSI Login negotiation failed.\n");
1016 kfree(login->req_buf);
1022 int iscsi_target_start_negotiation(
1023 struct iscsi_login *login,
1024 struct iscsi_conn *conn)
1028 login->rsp = kzalloc(ISCSI_HDR_LEN, GFP_KERNEL);
1030 pr_err("Unable to allocate memory for"
1031 " Login Response.\n");
1032 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1033 ISCSI_LOGIN_STATUS_NO_RESOURCES);
1038 login->rsp_buf = kzalloc(MAX_KEY_VALUE_PAIRS, GFP_KERNEL);
1039 if (!login->rsp_buf) {
1040 pr_err("Unable to allocate memory for"
1041 " request buffer.\n");
1042 iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
1043 ISCSI_LOGIN_STATUS_NO_RESOURCES);
1048 ret = iscsi_target_do_login(conn, login);
1051 iscsi_remove_failed_auth_entry(conn);
1053 iscsi_target_nego_release(login, conn);
1057 void iscsi_target_nego_release(
1058 struct iscsi_login *login,
1059 struct iscsi_conn *conn)
1063 kfree(login->req_buf);
1064 kfree(login->rsp_buf);