/**
* iscsi_iser_conn_bind() - bind iscsi and iser connection structures
* @cls_session: iscsi class session
* @cls_conn: iscsi class connection
* @transport_eph: transport end-point handle
* @is_leading: indicate if this is the session leading connection (MCS)
*
* Return: zero on success, $error if iscsi_conn_bind fails and
* -EINVAL in case end-point doesn't exsits anymore or iser connection
* state is not UP (teardown already started).
*/
static int
iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn,
uint64_t transport_eph,
int is_leading)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iser_conn *iser_conn;
struct iscsi_endpoint *ep;
int error;
error = iscsi_conn_bind(cls_session, cls_conn, is_leading);
if (error)
return error;
/* the transport ep handle comes from user space so it must be
* verified against the global ib connections list */
ep = iscsi_lookup_endpoint(transport_eph);
if (!ep) {
iser_err("can't bind eph %llx\n",
(unsigned long long)transport_eph);
return -EINVAL;
}
iser_conn = ep->dd_data;
mutex_lock(&iser_conn->state_mutex);
if (iser_conn->state != ISER_CONN_UP) {
error = -EINVAL;
iser_err("iser_conn %p state is %d, teardown started\n",
iser_conn, iser_conn->state);
goto out;
}
error = iser_alloc_rx_descriptors(iser_conn, conn->session);
if (error)
goto out;
/* binds the iSER connection retrieved from the previously
* connected ep_handle to the iSCSI layer connection. exchanges
* connection pointers */
iser_info("binding iscsi conn %p to iser_conn %p\n", conn, iser_conn);
conn->dd_data = iser_conn;
iser_conn->iscsi_conn = conn;
out:
mutex_unlock(&iser_conn->state_mutex);
return error;
}
/**
* iser_conn_set_full_featured_mode - (iSER API)
*/
int iser_conn_set_full_featured_mode(struct iscsi_conn *conn)
{
struct iscsi_iser_conn *iser_conn = conn->dd_data;
iser_dbg("Initially post: %d\n", ISER_MIN_POSTED_RX);
/* Check that there is no posted recv or send buffers left - */
/* they must be consumed during the login phase */
BUG_ON(iser_conn->ib_conn->post_recv_buf_count != 0);
BUG_ON(atomic_read(&iser_conn->ib_conn->post_send_buf_count) != 0);
if (iser_alloc_rx_descriptors(iser_conn->ib_conn))
return -ENOMEM;
/* Initial post receive buffers */
if (iser_post_recvm(iser_conn->ib_conn, ISER_MIN_POSTED_RX))
return -ENOMEM;
return 0;
}
static int
iscsi_iser_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn, uint64_t transport_eph,
int is_leading)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_session *session;
struct iser_conn *ib_conn;
struct iscsi_endpoint *ep;
int error;
error = iscsi_conn_bind(cls_session, cls_conn, is_leading);
if (error)
return error;
/* the transport ep handle comes from user space so it must be
* verified against the global ib connections list */
ep = iscsi_lookup_endpoint(transport_eph);
if (!ep) {
iser_err("can't bind eph %llx\n",
(unsigned long long)transport_eph);
return -EINVAL;
}
ib_conn = ep->dd_data;
session = conn->session;
if (iser_alloc_rx_descriptors(ib_conn, session))
return -ENOMEM;
/* binds the iSER connection retrieved from the previously
* connected ep_handle to the iSCSI layer connection. exchanges
* connection pointers */
iser_info("binding iscsi conn %p to ib_conn %p\n", conn, ib_conn);
conn->dd_data = ib_conn;
ib_conn->iscsi_conn = conn;
iser_conn_get(ib_conn); /* ref iscsi/ib conn binding */
return 0;
}