From patchwork Thu May 12 10:45:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 12847521 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9B721C433EF for ; Thu, 12 May 2022 10:45:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352767AbiELKph (ORCPT ); Thu, 12 May 2022 06:45:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43916 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352777AbiELKpb (ORCPT ); Thu, 12 May 2022 06:45:31 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1346E68FAB; Thu, 12 May 2022 03:45:28 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 8758E41467; Thu, 12 May 2022 10:45:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received:received; s= mta-01; t=1652352326; x=1654166727; bh=ZWUVB8LjXAyp9FUkWw1swZxA/ 2Ll3CnE3X6aydYTBbg=; b=IB9J+amNUQh6g8903YL75HWJvZZ/O3v31E/ohUYql 1MkQrh992blOXv4iKrolEGNMQUhGEWSegB0njZnRSapy2CML/BFh+1ixVI7f/y7q /hYnd5nx6xUxZqb4r14CFl48heFwFRcwC3yX6PoIDmRTZtiZO0fPF+CMlH4BrKSJ 3Y= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vQe0LsOj4iTW; Thu, 12 May 2022 13:45:26 +0300 (MSK) Received: from T-EXCH-01.corp.yadro.com (t-exch-01.corp.yadro.com [172.17.10.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 2E4AD41468; Thu, 12 May 2022 13:45:26 +0300 (MSK) Received: from T-EXCH-08.corp.yadro.com (172.17.11.58) by T-EXCH-01.corp.yadro.com (172.17.10.101) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Thu, 12 May 2022 13:45:26 +0300 Received: from NB-591.corp.yadro.com (10.178.114.42) by T-EXCH-08.corp.yadro.com (172.17.11.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.986.22; Thu, 12 May 2022 13:45:25 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: Mike Christie , , , Dmitry Bogdanov , Roman Bolshakov , Konstantin Shelekhin Subject: [PATCH v4 2/3] scsi: target: iscsi: extract auth functions Date: Thu, 12 May 2022 13:45:07 +0300 Message-ID: <20220512104508.8680-3-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220512104508.8680-1-d.bogdanov@yadro.com> References: <20220512104508.8680-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.178.114.42] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-08.corp.yadro.com (172.17.11.58) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Create functions that answers simple questions: whether authentication is required, what credentials, whether connection is autenticated. Reviewed-by: Roman Bolshakov Reviewed-by: Konstantin Shelekhin Signed-off-by: Dmitry Bogdanov --- drivers/target/iscsi/iscsi_target_nego.c | 140 +++++++++++++++-------- 1 file changed, 92 insertions(+), 48 deletions(-) diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c index f0769708e4fb..89b24d7d031d 100644 --- a/drivers/target/iscsi/iscsi_target_nego.c +++ b/drivers/target/iscsi/iscsi_target_nego.c @@ -94,6 +94,31 @@ int extract_param( return 0; } +static struct iscsi_node_auth *iscsi_get_node_auth(struct iscsi_conn *conn) +{ + struct iscsi_portal_group *tpg; + struct iscsi_node_acl *nacl; + struct se_node_acl *se_nacl; + + if (conn->sess->sess_ops->SessionType) + return &iscsit_global->discovery_acl.node_auth; + + se_nacl = conn->sess->se_sess->se_node_acl; + if (!se_nacl) { + pr_err("Unable to locate struct se_node_acl for CHAP auth\n"); + return NULL; + } + + if (se_nacl->dynamic_node_acl) { + tpg = to_iscsi_tpg(se_nacl->se_tpg); + return &tpg->tpg_demo_auth; + } + + nacl = to_iscsi_nacl(se_nacl); + + return &nacl->node_auth; +} + static u32 iscsi_handle_authentication( struct iscsi_conn *conn, char *in_buf, @@ -102,38 +127,11 @@ static u32 iscsi_handle_authentication( int *out_length, unsigned char *authtype) { - struct iscsi_session *sess = conn->sess; struct iscsi_node_auth *auth; - struct iscsi_node_acl *nacl; - struct iscsi_portal_group *tpg; - struct se_node_acl *se_nacl; - - if (!sess->sess_ops->SessionType) { - /* - * For SessionType=Normal - */ - se_nacl = conn->sess->se_sess->se_node_acl; - if (!se_nacl) { - pr_err("Unable to locate struct se_node_acl for" - " CHAP auth\n"); - return -1; - } - - if (se_nacl->dynamic_node_acl) { - tpg = to_iscsi_tpg(se_nacl->se_tpg); - - auth = &tpg->tpg_demo_auth; - } else { - nacl = to_iscsi_nacl(se_nacl); - auth = &nacl->node_auth; - } - } else { - /* - * For SessionType=Discovery - */ - auth = &iscsit_global->discovery_acl.node_auth; - } + auth = iscsi_get_node_auth(conn); + if (!auth) + return -1; if (strstr("CHAP", authtype)) strcpy(conn->sess->auth_type, "CHAP"); @@ -813,6 +811,37 @@ static int iscsi_target_do_authentication( return 0; } +static bool iscsi_conn_auth_required(struct iscsi_conn *conn) +{ + struct se_node_acl *se_nacl; + + if (conn->sess->sess_ops->SessionType) { + /* + * For SessionType=Discovery + */ + return conn->tpg->tpg_attrib.authentication; + } + /* + * For SessionType=Normal + */ + se_nacl = conn->sess->se_sess->se_node_acl; + if (!se_nacl) { + pr_debug("Unknown ACL %s is trying to connect\n", + se_nacl->initiatorname); + return true; + } + + if (se_nacl->dynamic_node_acl) { + pr_debug("Dynamic ACL %s is trying to connect\n", + se_nacl->initiatorname); + return conn->tpg->tpg_attrib.authentication; + } + + pr_debug("Known ACL %s is trying to connect\n", + se_nacl->initiatorname); + return conn->tpg->tpg_attrib.authentication; +} + static int iscsi_target_handle_csg_zero( struct iscsi_conn *conn, struct iscsi_login *login) @@ -874,22 +903,26 @@ static int iscsi_target_handle_csg_zero( 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; - } + bool auth_required = iscsi_conn_auth_required(conn); + + if (auth_required) { + if (!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 (!login->auth_complete) + return 0; - if (strncmp(param->value, NONE, 4) && !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)) { @@ -904,6 +937,18 @@ static int iscsi_target_handle_csg_zero( return iscsi_target_do_authentication(conn, login); } +static bool iscsi_conn_authenticated(struct iscsi_conn *conn, + struct iscsi_login *login) +{ + if (!iscsi_conn_auth_required(conn)) + return true; + + if (login->auth_complete) + return true; + + return false; +} + static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_login *login) { int ret; @@ -947,11 +992,10 @@ static int iscsi_target_handle_csg_one(struct iscsi_conn *conn, struct iscsi_log return -1; } - if (!login->auth_complete && - conn->tpg->tpg_attrib.authentication) { + if (!iscsi_conn_authenticated(conn, login)) { pr_err("Initiator is requesting CSG: 1, has not been" - " successfully authenticated, and the Target is" - " enforcing iSCSI Authentication, login failed.\n"); + " 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;