1282 lines
33 KiB
C
1282 lines
33 KiB
C
/*******************************************************************************
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* This file contains main functions related to iSCSI Parameter negotiation.
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*
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* (c) Copyright 2007-2013 Datera, Inc.
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*
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* Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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******************************************************************************/
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#include <linux/ctype.h>
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#include <linux/kthread.h>
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#include <scsi/iscsi_proto.h>
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#include <target/target_core_base.h>
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#include <target/target_core_fabric.h>
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#include <target/iscsi/iscsi_transport.h>
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#include <target/iscsi/iscsi_target_core.h>
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#include "iscsi_target_parameters.h"
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#include "iscsi_target_login.h"
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#include "iscsi_target_nego.h"
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#include "iscsi_target_tpg.h"
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#include "iscsi_target_util.h"
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#include "iscsi_target.h"
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#include "iscsi_target_auth.h"
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#define MAX_LOGIN_PDUS 7
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#define TEXT_LEN 4096
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void convert_null_to_semi(char *buf, int len)
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{
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int i;
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for (i = 0; i < len; i++)
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if (buf[i] == '\0')
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buf[i] = ';';
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}
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static int strlen_semi(char *buf)
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{
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int i = 0;
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while (buf[i] != '\0') {
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if (buf[i] == ';')
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return i;
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i++;
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}
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return -1;
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}
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int extract_param(
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const char *in_buf,
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const char *pattern,
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unsigned int max_length,
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char *out_buf,
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unsigned char *type)
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{
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char *ptr;
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int len;
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if (!in_buf || !pattern || !out_buf || !type)
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return -1;
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ptr = strstr(in_buf, pattern);
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if (!ptr)
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return -1;
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ptr = strstr(ptr, "=");
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if (!ptr)
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return -1;
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ptr += 1;
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if (*ptr == '0' && (*(ptr+1) == 'x' || *(ptr+1) == 'X')) {
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ptr += 2; /* skip 0x */
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*type = HEX;
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} else
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*type = DECIMAL;
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len = strlen_semi(ptr);
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if (len < 0)
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return -1;
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if (len >= max_length) {
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pr_err("Length of input: %d exceeds max_length:"
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" %d\n", len, max_length);
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return -1;
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}
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memcpy(out_buf, ptr, len);
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out_buf[len] = '\0';
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return 0;
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}
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static u32 iscsi_handle_authentication(
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struct iscsi_conn *conn,
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char *in_buf,
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char *out_buf,
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int in_length,
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int *out_length,
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unsigned char *authtype)
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{
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struct iscsi_session *sess = conn->sess;
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struct iscsi_node_auth *auth;
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struct iscsi_node_acl *iscsi_nacl;
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struct iscsi_portal_group *iscsi_tpg;
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struct se_node_acl *se_nacl;
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if (!sess->sess_ops->SessionType) {
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/*
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* For SessionType=Normal
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*/
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se_nacl = conn->sess->se_sess->se_node_acl;
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if (!se_nacl) {
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pr_err("Unable to locate struct se_node_acl for"
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" CHAP auth\n");
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return -1;
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}
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iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl,
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se_node_acl);
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if (!iscsi_nacl) {
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pr_err("Unable to locate struct iscsi_node_acl for"
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" CHAP auth\n");
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return -1;
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}
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if (se_nacl->dynamic_node_acl) {
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iscsi_tpg = container_of(se_nacl->se_tpg,
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struct iscsi_portal_group, tpg_se_tpg);
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auth = &iscsi_tpg->tpg_demo_auth;
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} else {
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iscsi_nacl = container_of(se_nacl, struct iscsi_node_acl,
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se_node_acl);
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auth = &iscsi_nacl->node_auth;
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}
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} else {
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/*
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* For SessionType=Discovery
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*/
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auth = &iscsit_global->discovery_acl.node_auth;
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}
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if (strstr("CHAP", authtype))
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strcpy(conn->sess->auth_type, "CHAP");
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else
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strcpy(conn->sess->auth_type, NONE);
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if (strstr("None", authtype))
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return 1;
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#ifdef CANSRP
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else if (strstr("SRP", authtype))
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return srp_main_loop(conn, auth, in_buf, out_buf,
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&in_length, out_length);
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#endif
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else if (strstr("CHAP", authtype))
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return chap_main_loop(conn, auth, in_buf, out_buf,
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&in_length, out_length);
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else if (strstr("SPKM1", authtype))
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return 2;
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else if (strstr("SPKM2", authtype))
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return 2;
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else if (strstr("KRB5", authtype))
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return 2;
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else
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return 2;
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}
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static void iscsi_remove_failed_auth_entry(struct iscsi_conn *conn)
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{
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kfree(conn->auth_protocol);
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}
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int iscsi_target_check_login_request(
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struct iscsi_conn *conn,
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struct iscsi_login *login)
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{
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int req_csg, req_nsg;
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u32 payload_length;
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struct iscsi_login_req *login_req;
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login_req = (struct iscsi_login_req *) login->req;
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payload_length = ntoh24(login_req->dlength);
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switch (login_req->opcode & ISCSI_OPCODE_MASK) {
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case ISCSI_OP_LOGIN:
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break;
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default:
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pr_err("Received unknown opcode 0x%02x.\n",
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login_req->opcode & ISCSI_OPCODE_MASK);
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_INIT_ERR);
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return -1;
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}
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if ((login_req->flags & ISCSI_FLAG_LOGIN_CONTINUE) &&
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(login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
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pr_err("Login request has both ISCSI_FLAG_LOGIN_CONTINUE"
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" and ISCSI_FLAG_LOGIN_TRANSIT set, protocol error.\n");
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_INIT_ERR);
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return -1;
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}
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req_csg = ISCSI_LOGIN_CURRENT_STAGE(login_req->flags);
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req_nsg = ISCSI_LOGIN_NEXT_STAGE(login_req->flags);
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if (req_csg != login->current_stage) {
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pr_err("Initiator unexpectedly changed login stage"
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" from %d to %d, login failed.\n", login->current_stage,
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req_csg);
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_INIT_ERR);
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return -1;
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}
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if ((req_nsg == 2) || (req_csg >= 2) ||
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((login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT) &&
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(req_nsg <= req_csg))) {
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pr_err("Illegal login_req->flags Combination, CSG: %d,"
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" NSG: %d, ISCSI_FLAG_LOGIN_TRANSIT: %d.\n", req_csg,
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req_nsg, (login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT));
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_INIT_ERR);
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return -1;
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}
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if ((login_req->max_version != login->version_max) ||
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(login_req->min_version != login->version_min)) {
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pr_err("Login request changed Version Max/Nin"
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" unexpectedly to 0x%02x/0x%02x, protocol error\n",
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login_req->max_version, login_req->min_version);
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_INIT_ERR);
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return -1;
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}
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if (memcmp(login_req->isid, login->isid, 6) != 0) {
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pr_err("Login request changed ISID unexpectedly,"
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" protocol error.\n");
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_INIT_ERR);
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return -1;
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}
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if (login_req->itt != login->init_task_tag) {
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pr_err("Login request changed ITT unexpectedly to"
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" 0x%08x, protocol error.\n", login_req->itt);
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_INIT_ERR);
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return -1;
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}
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if (payload_length > MAX_KEY_VALUE_PAIRS) {
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pr_err("Login request payload exceeds default"
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" MaxRecvDataSegmentLength: %u, protocol error.\n",
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MAX_KEY_VALUE_PAIRS);
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return -1;
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}
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return 0;
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}
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static int iscsi_target_check_first_request(
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struct iscsi_conn *conn,
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struct iscsi_login *login)
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{
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struct iscsi_param *param = NULL;
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struct se_node_acl *se_nacl;
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login->first_request = 0;
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list_for_each_entry(param, &conn->param_list->param_list, p_list) {
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if (!strncmp(param->name, SESSIONTYPE, 11)) {
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if (!IS_PSTATE_ACCEPTOR(param)) {
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pr_err("SessionType key not received"
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" in first login request.\n");
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_MISSING_FIELDS);
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return -1;
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}
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if (!strncmp(param->value, DISCOVERY, 9))
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return 0;
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}
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if (!strncmp(param->name, INITIATORNAME, 13)) {
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if (!IS_PSTATE_ACCEPTOR(param)) {
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if (!login->leading_connection)
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continue;
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pr_err("InitiatorName key not received"
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" in first login request.\n");
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_MISSING_FIELDS);
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return -1;
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}
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/*
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* For non-leading connections, double check that the
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* received InitiatorName matches the existing session's
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* struct iscsi_node_acl.
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*/
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if (!login->leading_connection) {
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se_nacl = conn->sess->se_sess->se_node_acl;
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if (!se_nacl) {
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pr_err("Unable to locate"
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" struct se_node_acl\n");
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iscsit_tx_login_rsp(conn,
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ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
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return -1;
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}
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if (strcmp(param->value,
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se_nacl->initiatorname)) {
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pr_err("Incorrect"
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" InitiatorName: %s for this"
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" iSCSI Initiator Node.\n",
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param->value);
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iscsit_tx_login_rsp(conn,
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ISCSI_STATUS_CLS_INITIATOR_ERR,
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ISCSI_LOGIN_STATUS_TGT_NOT_FOUND);
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return -1;
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}
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}
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}
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}
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return 0;
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}
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static int iscsi_target_do_tx_login_io(struct iscsi_conn *conn, struct iscsi_login *login)
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{
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u32 padding = 0;
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struct iscsi_login_rsp *login_rsp;
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login_rsp = (struct iscsi_login_rsp *) login->rsp;
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login_rsp->opcode = ISCSI_OP_LOGIN_RSP;
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hton24(login_rsp->dlength, login->rsp_length);
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memcpy(login_rsp->isid, login->isid, 6);
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login_rsp->tsih = cpu_to_be16(login->tsih);
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login_rsp->itt = login->init_task_tag;
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login_rsp->statsn = cpu_to_be32(conn->stat_sn++);
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login_rsp->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
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login_rsp->max_cmdsn = cpu_to_be32((u32) atomic_read(&conn->sess->max_cmd_sn));
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pr_debug("Sending Login Response, Flags: 0x%02x, ITT: 0x%08x,"
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" ExpCmdSN; 0x%08x, MaxCmdSN: 0x%08x, StatSN: 0x%08x, Length:"
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" %u\n", login_rsp->flags, (__force u32)login_rsp->itt,
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ntohl(login_rsp->exp_cmdsn), ntohl(login_rsp->max_cmdsn),
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ntohl(login_rsp->statsn), login->rsp_length);
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padding = ((-login->rsp_length) & 3);
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/*
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* Before sending the last login response containing the transition
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* bit for full-feature-phase, go ahead and start up TX/RX threads
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* now to avoid potential resource allocation failures after the
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* final login response has been sent.
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*/
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if (login->login_complete) {
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int rc = iscsit_start_kthreads(conn);
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if (rc) {
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iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
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ISCSI_LOGIN_STATUS_NO_RESOURCES);
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return -1;
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}
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}
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if (conn->conn_transport->iscsit_put_login_tx(conn, login,
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login->rsp_length + padding) < 0)
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goto err;
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login->rsp_length = 0;
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return 0;
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err:
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if (login->login_complete) {
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if (conn->rx_thread && conn->rx_thread_active) {
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send_sig(SIGINT, conn->rx_thread, 1);
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kthread_stop(conn->rx_thread);
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}
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if (conn->tx_thread && conn->tx_thread_active) {
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send_sig(SIGINT, conn->tx_thread, 1);
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kthread_stop(conn->tx_thread);
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}
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spin_lock(&iscsit_global->ts_bitmap_lock);
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bitmap_release_region(iscsit_global->ts_bitmap, conn->bitmap_id,
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get_order(1));
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spin_unlock(&iscsit_global->ts_bitmap_lock);
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}
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return -1;
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}
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static void iscsi_target_sk_data_ready(struct sock *sk)
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{
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struct iscsi_conn *conn = sk->sk_user_data;
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bool rc;
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pr_debug("Entering iscsi_target_sk_data_ready: conn: %p\n", conn);
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write_lock_bh(&sk->sk_callback_lock);
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if (!sk->sk_user_data) {
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write_unlock_bh(&sk->sk_callback_lock);
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return;
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}
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if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) {
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write_unlock_bh(&sk->sk_callback_lock);
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pr_debug("Got LOGIN_FLAGS_READY=0, conn: %p >>>>\n", conn);
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return;
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}
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if (test_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) {
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write_unlock_bh(&sk->sk_callback_lock);
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pr_debug("Got LOGIN_FLAGS_CLOSED=1, conn: %p >>>>\n", conn);
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return;
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}
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if (test_and_set_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) {
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write_unlock_bh(&sk->sk_callback_lock);
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pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1, conn: %p >>>>\n", conn);
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return;
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}
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rc = schedule_delayed_work(&conn->login_work, 0);
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if (!rc) {
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pr_debug("iscsi_target_sk_data_ready, schedule_delayed_work"
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" got false\n");
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}
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write_unlock_bh(&sk->sk_callback_lock);
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}
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|
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static void iscsi_target_sk_state_change(struct sock *);
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|
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static void iscsi_target_set_sock_callbacks(struct iscsi_conn *conn)
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{
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struct sock *sk;
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if (!conn->sock)
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return;
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sk = conn->sock->sk;
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pr_debug("Entering iscsi_target_set_sock_callbacks: conn: %p\n", conn);
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write_lock_bh(&sk->sk_callback_lock);
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sk->sk_user_data = conn;
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conn->orig_data_ready = sk->sk_data_ready;
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conn->orig_state_change = sk->sk_state_change;
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sk->sk_data_ready = iscsi_target_sk_data_ready;
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sk->sk_state_change = iscsi_target_sk_state_change;
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write_unlock_bh(&sk->sk_callback_lock);
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sk->sk_sndtimeo = TA_LOGIN_TIMEOUT * HZ;
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sk->sk_rcvtimeo = TA_LOGIN_TIMEOUT * HZ;
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}
|
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|
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static void iscsi_target_restore_sock_callbacks(struct iscsi_conn *conn)
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{
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struct sock *sk;
|
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|
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if (!conn->sock)
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return;
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|
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sk = conn->sock->sk;
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pr_debug("Entering iscsi_target_restore_sock_callbacks: conn: %p\n", conn);
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|
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write_lock_bh(&sk->sk_callback_lock);
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if (!sk->sk_user_data) {
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write_unlock_bh(&sk->sk_callback_lock);
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return;
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}
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sk->sk_user_data = NULL;
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sk->sk_data_ready = conn->orig_data_ready;
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sk->sk_state_change = conn->orig_state_change;
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write_unlock_bh(&sk->sk_callback_lock);
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|
|
sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
|
|
sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
|
|
}
|
|
|
|
static int iscsi_target_do_login(struct iscsi_conn *, struct iscsi_login *);
|
|
|
|
static bool iscsi_target_sk_state_check(struct sock *sk)
|
|
{
|
|
if (sk->sk_state == TCP_CLOSE_WAIT || sk->sk_state == TCP_CLOSE) {
|
|
pr_debug("iscsi_target_sk_state_check: TCP_CLOSE_WAIT|TCP_CLOSE,"
|
|
"returning FALSE\n");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static void iscsi_target_login_drop(struct iscsi_conn *conn, struct iscsi_login *login)
|
|
{
|
|
struct iscsi_np *np = login->np;
|
|
bool zero_tsih = login->zero_tsih;
|
|
|
|
iscsi_remove_failed_auth_entry(conn);
|
|
iscsi_target_nego_release(conn);
|
|
iscsi_target_login_sess_out(conn, np, zero_tsih, true);
|
|
}
|
|
|
|
static void iscsi_target_login_timeout(unsigned long data)
|
|
{
|
|
struct iscsi_conn *conn = (struct iscsi_conn *)data;
|
|
|
|
pr_debug("Entering iscsi_target_login_timeout >>>>>>>>>>>>>>>>>>>\n");
|
|
|
|
if (conn->login_kworker) {
|
|
pr_debug("Sending SIGINT to conn->login_kworker %s/%d\n",
|
|
conn->login_kworker->comm, conn->login_kworker->pid);
|
|
send_sig(SIGINT, conn->login_kworker, 1);
|
|
}
|
|
}
|
|
|
|
static void iscsi_target_do_login_rx(struct work_struct *work)
|
|
{
|
|
struct iscsi_conn *conn = container_of(work,
|
|
struct iscsi_conn, login_work.work);
|
|
struct iscsi_login *login = conn->login;
|
|
struct iscsi_np *np = login->np;
|
|
struct iscsi_portal_group *tpg = conn->tpg;
|
|
struct iscsi_tpg_np *tpg_np = conn->tpg_np;
|
|
struct timer_list login_timer;
|
|
int rc, zero_tsih = login->zero_tsih;
|
|
bool state;
|
|
|
|
pr_debug("entering iscsi_target_do_login_rx, conn: %p, %s:%d\n",
|
|
conn, current->comm, current->pid);
|
|
|
|
spin_lock(&tpg->tpg_state_lock);
|
|
state = (tpg->tpg_state == TPG_STATE_ACTIVE);
|
|
spin_unlock(&tpg->tpg_state_lock);
|
|
|
|
if (!state) {
|
|
pr_debug("iscsi_target_do_login_rx: tpg_state != TPG_STATE_ACTIVE\n");
|
|
iscsi_target_restore_sock_callbacks(conn);
|
|
iscsi_target_login_drop(conn, login);
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
return;
|
|
}
|
|
|
|
if (conn->sock) {
|
|
struct sock *sk = conn->sock->sk;
|
|
|
|
read_lock_bh(&sk->sk_callback_lock);
|
|
state = iscsi_target_sk_state_check(sk);
|
|
read_unlock_bh(&sk->sk_callback_lock);
|
|
|
|
if (!state) {
|
|
pr_debug("iscsi_target_do_login_rx, TCP state CLOSE\n");
|
|
iscsi_target_restore_sock_callbacks(conn);
|
|
iscsi_target_login_drop(conn, login);
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
return;
|
|
}
|
|
}
|
|
|
|
conn->login_kworker = current;
|
|
allow_signal(SIGINT);
|
|
|
|
init_timer(&login_timer);
|
|
login_timer.expires = (get_jiffies_64() + TA_LOGIN_TIMEOUT * HZ);
|
|
login_timer.data = (unsigned long)conn;
|
|
login_timer.function = iscsi_target_login_timeout;
|
|
add_timer(&login_timer);
|
|
pr_debug("Starting login_timer for %s/%d\n", current->comm, current->pid);
|
|
|
|
rc = conn->conn_transport->iscsit_get_login_rx(conn, login);
|
|
del_timer_sync(&login_timer);
|
|
flush_signals(current);
|
|
conn->login_kworker = NULL;
|
|
|
|
if (rc < 0) {
|
|
iscsi_target_restore_sock_callbacks(conn);
|
|
iscsi_target_login_drop(conn, login);
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
return;
|
|
}
|
|
|
|
pr_debug("iscsi_target_do_login_rx after rx_login_io, %p, %s:%d\n",
|
|
conn, current->comm, current->pid);
|
|
|
|
rc = iscsi_target_do_login(conn, login);
|
|
if (rc < 0) {
|
|
iscsi_target_restore_sock_callbacks(conn);
|
|
iscsi_target_login_drop(conn, login);
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
} else if (!rc) {
|
|
if (conn->sock) {
|
|
struct sock *sk = conn->sock->sk;
|
|
|
|
write_lock_bh(&sk->sk_callback_lock);
|
|
clear_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags);
|
|
write_unlock_bh(&sk->sk_callback_lock);
|
|
}
|
|
} else if (rc == 1) {
|
|
iscsi_target_nego_release(conn);
|
|
iscsi_post_login_handler(np, conn, zero_tsih);
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
}
|
|
}
|
|
|
|
static void iscsi_target_do_cleanup(struct work_struct *work)
|
|
{
|
|
struct iscsi_conn *conn = container_of(work,
|
|
struct iscsi_conn, login_cleanup_work.work);
|
|
struct sock *sk = conn->sock->sk;
|
|
struct iscsi_login *login = conn->login;
|
|
struct iscsi_np *np = login->np;
|
|
struct iscsi_portal_group *tpg = conn->tpg;
|
|
struct iscsi_tpg_np *tpg_np = conn->tpg_np;
|
|
|
|
pr_debug("Entering iscsi_target_do_cleanup\n");
|
|
|
|
cancel_delayed_work_sync(&conn->login_work);
|
|
conn->orig_state_change(sk);
|
|
|
|
iscsi_target_restore_sock_callbacks(conn);
|
|
iscsi_target_login_drop(conn, login);
|
|
iscsit_deaccess_np(np, tpg, tpg_np);
|
|
|
|
pr_debug("iscsi_target_do_cleanup done()\n");
|
|
}
|
|
|
|
static void iscsi_target_sk_state_change(struct sock *sk)
|
|
{
|
|
struct iscsi_conn *conn;
|
|
void (*orig_state_change)(struct sock *);
|
|
bool state;
|
|
|
|
pr_debug("Entering iscsi_target_sk_state_change\n");
|
|
|
|
write_lock_bh(&sk->sk_callback_lock);
|
|
conn = sk->sk_user_data;
|
|
if (!conn) {
|
|
write_unlock_bh(&sk->sk_callback_lock);
|
|
return;
|
|
}
|
|
orig_state_change = conn->orig_state_change;
|
|
|
|
if (!test_bit(LOGIN_FLAGS_READY, &conn->login_flags)) {
|
|
pr_debug("Got LOGIN_FLAGS_READY=0 sk_state_change conn: %p\n",
|
|
conn);
|
|
write_unlock_bh(&sk->sk_callback_lock);
|
|
orig_state_change(sk);
|
|
return;
|
|
}
|
|
if (test_bit(LOGIN_FLAGS_READ_ACTIVE, &conn->login_flags)) {
|
|
pr_debug("Got LOGIN_FLAGS_READ_ACTIVE=1 sk_state_change"
|
|
" conn: %p\n", conn);
|
|
write_unlock_bh(&sk->sk_callback_lock);
|
|
orig_state_change(sk);
|
|
return;
|
|
}
|
|
if (test_and_set_bit(LOGIN_FLAGS_CLOSED, &conn->login_flags)) {
|
|
pr_debug("Got LOGIN_FLAGS_CLOSED=1 sk_state_change conn: %p\n",
|
|
conn);
|
|
write_unlock_bh(&sk->sk_callback_lock);
|
|
orig_state_change(sk);
|
|
return;
|
|
}
|
|
|
|
state = iscsi_target_sk_state_check(sk);
|
|
write_unlock_bh(&sk->sk_callback_lock);
|
|
|
|
pr_debug("iscsi_target_sk_state_change: state: %d\n", state);
|
|
|
|
if (!state) {
|
|
pr_debug("iscsi_target_sk_state_change got failed state\n");
|
|
schedule_delayed_work(&conn->login_cleanup_work, 0);
|
|
return;
|
|
}
|
|
orig_state_change(sk);
|
|
}
|
|
|
|
/*
|
|
* NOTE: We check for existing sessions or connections AFTER the initiator
|
|
* has been successfully authenticated in order to protect against faked
|
|
* ISID/TSIH combinations.
|
|
*/
|
|
static int iscsi_target_check_for_existing_instances(
|
|
struct iscsi_conn *conn,
|
|
struct iscsi_login *login)
|
|
{
|
|
if (login->checked_for_existing)
|
|
return 0;
|
|
|
|
login->checked_for_existing = 1;
|
|
|
|
if (!login->tsih)
|
|
return iscsi_check_for_session_reinstatement(conn);
|
|
else
|
|
return iscsi_login_post_auth_non_zero_tsih(conn, login->cid,
|
|
login->initial_exp_statsn);
|
|
}
|
|
|
|
static int iscsi_target_do_authentication(
|
|
struct iscsi_conn *conn,
|
|
struct iscsi_login *login)
|
|
{
|
|
int authret;
|
|
u32 payload_length;
|
|
struct iscsi_param *param;
|
|
struct iscsi_login_req *login_req;
|
|
struct iscsi_login_rsp *login_rsp;
|
|
|
|
login_req = (struct iscsi_login_req *) login->req;
|
|
login_rsp = (struct iscsi_login_rsp *) login->rsp;
|
|
payload_length = ntoh24(login_req->dlength);
|
|
|
|
param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
|
|
if (!param)
|
|
return -1;
|
|
|
|
authret = iscsi_handle_authentication(
|
|
conn,
|
|
login->req_buf,
|
|
login->rsp_buf,
|
|
payload_length,
|
|
&login->rsp_length,
|
|
param->value);
|
|
switch (authret) {
|
|
case 0:
|
|
pr_debug("Received OK response"
|
|
" from LIO Authentication, continuing.\n");
|
|
break;
|
|
case 1:
|
|
pr_debug("iSCSI security negotiation"
|
|
" completed successfully.\n");
|
|
login->auth_complete = 1;
|
|
if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
|
|
(login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
|
|
login_rsp->flags |= (ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
|
|
ISCSI_FLAG_LOGIN_TRANSIT);
|
|
login->current_stage = 1;
|
|
}
|
|
return iscsi_target_check_for_existing_instances(
|
|
conn, login);
|
|
case 2:
|
|
pr_err("Security negotiation"
|
|
" failed.\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_AUTH_FAILED);
|
|
return -1;
|
|
default:
|
|
pr_err("Received unknown error %d from LIO"
|
|
" Authentication\n", authret);
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
|
|
ISCSI_LOGIN_STATUS_TARGET_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iscsi_target_handle_csg_zero(
|
|
struct iscsi_conn *conn,
|
|
struct iscsi_login *login)
|
|
{
|
|
int ret;
|
|
u32 payload_length;
|
|
struct iscsi_param *param;
|
|
struct iscsi_login_req *login_req;
|
|
struct iscsi_login_rsp *login_rsp;
|
|
|
|
login_req = (struct iscsi_login_req *) login->req;
|
|
login_rsp = (struct iscsi_login_rsp *) login->rsp;
|
|
payload_length = ntoh24(login_req->dlength);
|
|
|
|
param = iscsi_find_param_from_key(AUTHMETHOD, conn->param_list);
|
|
if (!param)
|
|
return -1;
|
|
|
|
ret = iscsi_decode_text_input(
|
|
PHASE_SECURITY|PHASE_DECLARATIVE,
|
|
SENDER_INITIATOR|SENDER_RECEIVER,
|
|
login->req_buf,
|
|
payload_length,
|
|
conn);
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
if (ret > 0) {
|
|
if (login->auth_complete) {
|
|
pr_err("Initiator has already been"
|
|
" successfully authenticated, but is still"
|
|
" sending %s keys.\n", param->value);
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_INIT_ERR);
|
|
return -1;
|
|
}
|
|
|
|
goto do_auth;
|
|
} else if (!payload_length) {
|
|
pr_err("Initiator sent zero length security payload,"
|
|
" login failed\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_AUTH_FAILED);
|
|
return -1;
|
|
}
|
|
|
|
if (login->first_request)
|
|
if (iscsi_target_check_first_request(conn, login) < 0)
|
|
return -1;
|
|
|
|
ret = iscsi_encode_text_output(
|
|
PHASE_SECURITY|PHASE_DECLARATIVE,
|
|
SENDER_TARGET,
|
|
login->rsp_buf,
|
|
&login->rsp_length,
|
|
conn->param_list);
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
if (!iscsi_check_negotiated_keys(conn->param_list)) {
|
|
if (conn->tpg->tpg_attrib.authentication &&
|
|
!strncmp(param->value, NONE, 4)) {
|
|
pr_err("Initiator sent AuthMethod=None but"
|
|
" Target is enforcing iSCSI Authentication,"
|
|
" login failed.\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_AUTH_FAILED);
|
|
return -1;
|
|
}
|
|
|
|
if (conn->tpg->tpg_attrib.authentication &&
|
|
!login->auth_complete)
|
|
return 0;
|
|
|
|
if (strncmp(param->value, NONE, 4) && !login->auth_complete)
|
|
return 0;
|
|
|
|
if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE1) &&
|
|
(login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT)) {
|
|
login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE1 |
|
|
ISCSI_FLAG_LOGIN_TRANSIT;
|
|
login->current_stage = 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
do_auth:
|
|
return iscsi_target_do_authentication(conn, login);
|
|
}
|
|
|
|
static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_login *login)
|
|
{
|
|
int ret;
|
|
u32 payload_length;
|
|
struct iscsi_login_req *login_req;
|
|
struct iscsi_login_rsp *login_rsp;
|
|
|
|
login_req = (struct iscsi_login_req *) login->req;
|
|
login_rsp = (struct iscsi_login_rsp *) login->rsp;
|
|
payload_length = ntoh24(login_req->dlength);
|
|
|
|
ret = iscsi_decode_text_input(
|
|
PHASE_OPERATIONAL|PHASE_DECLARATIVE,
|
|
SENDER_INITIATOR|SENDER_RECEIVER,
|
|
login->req_buf,
|
|
payload_length,
|
|
conn);
|
|
if (ret < 0) {
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_INIT_ERR);
|
|
return -1;
|
|
}
|
|
|
|
if (login->first_request)
|
|
if (iscsi_target_check_first_request(conn, login) < 0)
|
|
return -1;
|
|
|
|
if (iscsi_target_check_for_existing_instances(conn, login) < 0)
|
|
return -1;
|
|
|
|
ret = iscsi_encode_text_output(
|
|
PHASE_OPERATIONAL|PHASE_DECLARATIVE,
|
|
SENDER_TARGET,
|
|
login->rsp_buf,
|
|
&login->rsp_length,
|
|
conn->param_list);
|
|
if (ret < 0) {
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_INIT_ERR);
|
|
return -1;
|
|
}
|
|
|
|
if (!login->auth_complete &&
|
|
conn->tpg->tpg_attrib.authentication) {
|
|
pr_err("Initiator is requesting CSG: 1, has not been"
|
|
" successfully authenticated, and the Target is"
|
|
" enforcing iSCSI Authentication, login failed.\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_AUTH_FAILED);
|
|
return -1;
|
|
}
|
|
|
|
if (!iscsi_check_negotiated_keys(conn->param_list))
|
|
if ((login_req->flags & ISCSI_FLAG_LOGIN_NEXT_STAGE3) &&
|
|
(login_req->flags & ISCSI_FLAG_LOGIN_TRANSIT))
|
|
login_rsp->flags |= ISCSI_FLAG_LOGIN_NEXT_STAGE3 |
|
|
ISCSI_FLAG_LOGIN_TRANSIT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iscsi_target_do_login(struct iscsi_conn *conn, struct iscsi_login *login)
|
|
{
|
|
int pdu_count = 0;
|
|
struct iscsi_login_req *login_req;
|
|
struct iscsi_login_rsp *login_rsp;
|
|
|
|
login_req = (struct iscsi_login_req *) login->req;
|
|
login_rsp = (struct iscsi_login_rsp *) login->rsp;
|
|
|
|
while (1) {
|
|
if (++pdu_count > MAX_LOGIN_PDUS) {
|
|
pr_err("MAX_LOGIN_PDUS count reached.\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
|
|
ISCSI_LOGIN_STATUS_TARGET_ERROR);
|
|
return -1;
|
|
}
|
|
|
|
switch (ISCSI_LOGIN_CURRENT_STAGE(login_req->flags)) {
|
|
case 0:
|
|
login_rsp->flags &= ~ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK;
|
|
if (iscsi_target_handle_csg_zero(conn, login) < 0)
|
|
return -1;
|
|
break;
|
|
case 1:
|
|
login_rsp->flags |= ISCSI_FLAG_LOGIN_CURRENT_STAGE1;
|
|
if (iscsi_target_handle_csg_one(conn, login) < 0)
|
|
return -1;
|
|
if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
|
|
login->tsih = conn->sess->tsih;
|
|
login->login_complete = 1;
|
|
iscsi_target_restore_sock_callbacks(conn);
|
|
if (iscsi_target_do_tx_login_io(conn,
|
|
login) < 0)
|
|
return -1;
|
|
return 1;
|
|
}
|
|
break;
|
|
default:
|
|
pr_err("Illegal CSG: %d received from"
|
|
" Initiator, protocol error.\n",
|
|
ISCSI_LOGIN_CURRENT_STAGE(login_req->flags));
|
|
break;
|
|
}
|
|
|
|
if (iscsi_target_do_tx_login_io(conn, login) < 0)
|
|
return -1;
|
|
|
|
if (login_rsp->flags & ISCSI_FLAG_LOGIN_TRANSIT) {
|
|
login_rsp->flags &= ~ISCSI_FLAG_LOGIN_TRANSIT;
|
|
login_rsp->flags &= ~ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (conn->sock) {
|
|
struct sock *sk = conn->sock->sk;
|
|
bool state;
|
|
|
|
read_lock_bh(&sk->sk_callback_lock);
|
|
state = iscsi_target_sk_state_check(sk);
|
|
read_unlock_bh(&sk->sk_callback_lock);
|
|
|
|
if (!state) {
|
|
pr_debug("iscsi_target_do_login() failed state for"
|
|
" conn: %p\n", conn);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void iscsi_initiatorname_tolower(
|
|
char *param_buf)
|
|
{
|
|
char *c;
|
|
u32 iqn_size = strlen(param_buf), i;
|
|
|
|
for (i = 0; i < iqn_size; i++) {
|
|
c = ¶m_buf[i];
|
|
if (!isupper(*c))
|
|
continue;
|
|
|
|
*c = tolower(*c);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Processes the first Login Request..
|
|
*/
|
|
int iscsi_target_locate_portal(
|
|
struct iscsi_np *np,
|
|
struct iscsi_conn *conn,
|
|
struct iscsi_login *login)
|
|
{
|
|
char *i_buf = NULL, *s_buf = NULL, *t_buf = NULL;
|
|
char *tmpbuf, *start = NULL, *end = NULL, *key, *value;
|
|
struct iscsi_session *sess = conn->sess;
|
|
struct iscsi_tiqn *tiqn;
|
|
struct iscsi_tpg_np *tpg_np = NULL;
|
|
struct iscsi_login_req *login_req;
|
|
struct se_node_acl *se_nacl;
|
|
u32 payload_length, queue_depth = 0;
|
|
int sessiontype = 0, ret = 0, tag_num, tag_size;
|
|
|
|
INIT_DELAYED_WORK(&conn->login_work, iscsi_target_do_login_rx);
|
|
INIT_DELAYED_WORK(&conn->login_cleanup_work, iscsi_target_do_cleanup);
|
|
iscsi_target_set_sock_callbacks(conn);
|
|
|
|
login->np = np;
|
|
|
|
login_req = (struct iscsi_login_req *) login->req;
|
|
payload_length = ntoh24(login_req->dlength);
|
|
|
|
tmpbuf = kzalloc(payload_length + 1, GFP_KERNEL);
|
|
if (!tmpbuf) {
|
|
pr_err("Unable to allocate memory for tmpbuf.\n");
|
|
return -1;
|
|
}
|
|
|
|
memcpy(tmpbuf, login->req_buf, payload_length);
|
|
tmpbuf[payload_length] = '\0';
|
|
start = tmpbuf;
|
|
end = (start + payload_length);
|
|
|
|
/*
|
|
* Locate the initial keys expected from the Initiator node in
|
|
* the first login request in order to progress with the login phase.
|
|
*/
|
|
while (start < end) {
|
|
if (iscsi_extract_key_value(start, &key, &value) < 0) {
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (!strncmp(key, "InitiatorName", 13))
|
|
i_buf = value;
|
|
else if (!strncmp(key, "SessionType", 11))
|
|
s_buf = value;
|
|
else if (!strncmp(key, "TargetName", 10))
|
|
t_buf = value;
|
|
|
|
start += strlen(key) + strlen(value) + 2;
|
|
}
|
|
/*
|
|
* See 5.3. Login Phase.
|
|
*/
|
|
if (!i_buf) {
|
|
pr_err("InitiatorName key not received"
|
|
" in first login request.\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_MISSING_FIELDS);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Convert the incoming InitiatorName to lowercase following
|
|
* RFC-3720 3.2.6.1. section c) that says that iSCSI IQNs
|
|
* are NOT case sensitive.
|
|
*/
|
|
iscsi_initiatorname_tolower(i_buf);
|
|
|
|
if (!s_buf) {
|
|
if (!login->leading_connection)
|
|
goto get_target;
|
|
|
|
pr_err("SessionType key not received"
|
|
" in first login request.\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_MISSING_FIELDS);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Use default portal group for discovery sessions.
|
|
*/
|
|
sessiontype = strncmp(s_buf, DISCOVERY, 9);
|
|
if (!sessiontype) {
|
|
conn->tpg = iscsit_global->discovery_tpg;
|
|
if (!login->leading_connection)
|
|
goto get_target;
|
|
|
|
sess->sess_ops->SessionType = 1;
|
|
/*
|
|
* Setup crc32c modules from libcrypto
|
|
*/
|
|
if (iscsi_login_setup_crypto(conn) < 0) {
|
|
pr_err("iscsi_login_setup_crypto() failed\n");
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Serialize access across the discovery struct iscsi_portal_group to
|
|
* process login attempt.
|
|
*/
|
|
if (iscsit_access_np(np, conn->tpg) < 0) {
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
|
|
ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
ret = 0;
|
|
goto alloc_tags;
|
|
}
|
|
|
|
get_target:
|
|
if (!t_buf) {
|
|
pr_err("TargetName key not received"
|
|
" in first login request while"
|
|
" SessionType=Normal.\n");
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_MISSING_FIELDS);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Locate Target IQN from Storage Node.
|
|
*/
|
|
tiqn = iscsit_get_tiqn_for_login(t_buf);
|
|
if (!tiqn) {
|
|
pr_err("Unable to locate Target IQN: %s in"
|
|
" Storage Node\n", t_buf);
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
|
|
ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
pr_debug("Located Storage Object: %s\n", tiqn->tiqn);
|
|
|
|
/*
|
|
* Locate Target Portal Group from Storage Node.
|
|
*/
|
|
conn->tpg = iscsit_get_tpg_from_np(tiqn, np, &tpg_np);
|
|
if (!conn->tpg) {
|
|
pr_err("Unable to locate Target Portal Group"
|
|
" on %s\n", tiqn->tiqn);
|
|
iscsit_put_tiqn_for_login(tiqn);
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
|
|
ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
conn->tpg_np = tpg_np;
|
|
pr_debug("Located Portal Group Object: %hu\n", conn->tpg->tpgt);
|
|
/*
|
|
* Setup crc32c modules from libcrypto
|
|
*/
|
|
if (iscsi_login_setup_crypto(conn) < 0) {
|
|
pr_err("iscsi_login_setup_crypto() failed\n");
|
|
kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put);
|
|
iscsit_put_tiqn_for_login(tiqn);
|
|
conn->tpg = NULL;
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Serialize access across the struct iscsi_portal_group to
|
|
* process login attempt.
|
|
*/
|
|
if (iscsit_access_np(np, conn->tpg) < 0) {
|
|
kref_put(&tpg_np->tpg_np_kref, iscsit_login_kref_put);
|
|
iscsit_put_tiqn_for_login(tiqn);
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
|
|
ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE);
|
|
conn->tpg = NULL;
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* conn->sess->node_acl will be set when the referenced
|
|
* struct iscsi_session is located from received ISID+TSIH in
|
|
* iscsi_login_non_zero_tsih_s2().
|
|
*/
|
|
if (!login->leading_connection) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* This value is required in iscsi_login_zero_tsih_s2()
|
|
*/
|
|
sess->sess_ops->SessionType = 0;
|
|
|
|
/*
|
|
* Locate incoming Initiator IQN reference from Storage Node.
|
|
*/
|
|
sess->se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
|
|
&conn->tpg->tpg_se_tpg, i_buf);
|
|
if (!sess->se_sess->se_node_acl) {
|
|
pr_err("iSCSI Initiator Node: %s is not authorized to"
|
|
" access iSCSI target portal group: %hu.\n",
|
|
i_buf, conn->tpg->tpgt);
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_INITIATOR_ERR,
|
|
ISCSI_LOGIN_STATUS_TGT_FORBIDDEN);
|
|
ret = -1;
|
|
goto out;
|
|
}
|
|
se_nacl = sess->se_sess->se_node_acl;
|
|
queue_depth = se_nacl->queue_depth;
|
|
/*
|
|
* Setup pre-allocated tags based upon allowed per NodeACL CmdSN
|
|
* depth for non immediate commands, plus extra tags for immediate
|
|
* commands.
|
|
*
|
|
* Also enforce a ISCSIT_MIN_TAGS to prevent unnecessary contention
|
|
* in per-cpu-ida tag allocation logic + small queue_depth.
|
|
*/
|
|
alloc_tags:
|
|
tag_num = max_t(u32, ISCSIT_MIN_TAGS, queue_depth);
|
|
tag_num = (tag_num * 2) + ISCSIT_EXTRA_TAGS;
|
|
tag_size = sizeof(struct iscsi_cmd) + conn->conn_transport->priv_size;
|
|
|
|
ret = transport_alloc_session_tags(sess->se_sess, tag_num, tag_size);
|
|
if (ret < 0) {
|
|
iscsit_tx_login_rsp(conn, ISCSI_STATUS_CLS_TARGET_ERR,
|
|
ISCSI_LOGIN_STATUS_NO_RESOURCES);
|
|
ret = -1;
|
|
}
|
|
out:
|
|
kfree(tmpbuf);
|
|
return ret;
|
|
}
|
|
|
|
int iscsi_target_start_negotiation(
|
|
struct iscsi_login *login,
|
|
struct iscsi_conn *conn)
|
|
{
|
|
int ret;
|
|
|
|
ret = iscsi_target_do_login(conn, login);
|
|
if (!ret) {
|
|
if (conn->sock) {
|
|
struct sock *sk = conn->sock->sk;
|
|
|
|
write_lock_bh(&sk->sk_callback_lock);
|
|
set_bit(LOGIN_FLAGS_READY, &conn->login_flags);
|
|
write_unlock_bh(&sk->sk_callback_lock);
|
|
}
|
|
} else if (ret < 0) {
|
|
cancel_delayed_work_sync(&conn->login_work);
|
|
cancel_delayed_work_sync(&conn->login_cleanup_work);
|
|
iscsi_target_restore_sock_callbacks(conn);
|
|
iscsi_remove_failed_auth_entry(conn);
|
|
}
|
|
if (ret != 0)
|
|
iscsi_target_nego_release(conn);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void iscsi_target_nego_release(struct iscsi_conn *conn)
|
|
{
|
|
struct iscsi_login *login = conn->conn_login;
|
|
|
|
if (!login)
|
|
return;
|
|
|
|
kfree(login->req_buf);
|
|
kfree(login->rsp_buf);
|
|
kfree(login);
|
|
|
|
conn->conn_login = NULL;
|
|
}
|