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scsi: target: iscsi: Extract auth functions

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Create functions that answers simple questions: Whether authentication is
required, what credentials, whether connection is autenticated.

Link: https://lore.kernel.org/r/20220523095905.26070-3-d.bogdanov@yadro.com
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Reviewed-by: Konstantin Shelekhin <k.shelekhin@yadro.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Dmitry Bogdanov <d.bogdanov@yadro.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Dmitry Bogdanov 2022-05-23 12:59:04 +03:00 committed by Martin K. Petersen
parent a11b80692b
commit a75fcb0912
1 changed files with 93 additions and 49 deletions
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142
drivers/target/iscsi/iscsi_target_nego.c
View file

@ -94,6 +94,31 @@ int extract_param(
return 0;
}
static struct iscsi_node_auth *iscsi_get_node_auth(struct iscsit_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 iscsit_conn *conn,
char *in_buf,
@ -102,38 +127,11 @@ static u32 iscsi_handle_authentication(
int *out_length,
unsigned char *authtype)
{
struct iscsit_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 iscsit_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 iscsit_conn *conn,
struct iscsi_login *login)
@ -874,23 +903,27 @@ 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 (!login->auth_complete)
return 0;
if (strncmp(param->value, NONE, 4) &&
!login->auth_complete)
return 0;
}
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 |
@ -904,6 +937,18 @@ static int iscsi_target_handle_csg_zero(
return iscsi_target_do_authentication(conn, login);
}
static bool iscsi_conn_authenticated(struct iscsit_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 iscsit_conn *conn, struct iscsi_login *login)
{
int ret;
@ -947,11 +992,10 @@ static int iscsi_target_handle_csg_one(struct iscsit_conn *conn, struct iscsi_lo
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;