If the transport cannot be registered, the session/connection creation needs to be failed early to let the initiator know. Otherwise, the system will have an outstanding connection that cannot be used nor removed by open-iscsi. The result is similar to the error below, triggered by injecting a failure in the transport's registration path.
openiscsi reports success: root@debian-vm:~# iscsiadm -m node -T iqn:lun1 -p 127.0.0.1 -l Logging in to [iface: default, target: iqn:lun1, portal: 127.0.0.1,3260] Login to [iface: default, target: iqn:lun1, portal:127.0.0.1,3260] successful. But cannot remove the session afterwards, since the kernel is in an inconsistent state. root@debian-vm:~# iscsiadm -m node -T iqn:lun1 -p 127.0.0.1 -u iscsiadm: No matching sessions found Signed-off-by: Gabriel Krisman Bertazi <[email protected]> --- drivers/scsi/scsi_transport_iscsi.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index ed8d9709b9b9..2b732b7a9a5b 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -2093,7 +2093,12 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) "could not register session's dev\n"); goto release_ida; } - transport_register_device(&session->dev); + err = transport_register_device(&session->dev); + if (err) { + iscsi_cls_session_printk(KERN_ERR, session, + "could not register transport's dev\n"); + goto release_dev; + } spin_lock_irqsave(&sesslock, flags); list_add(&session->sess_list, &sesslist); @@ -2103,6 +2108,8 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id) ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n"); return 0; +release_dev: + device_del(&session->dev); release_ida: if (session->ida_used) ida_simple_remove(&iscsi_sess_ida, session->target_id); @@ -2263,7 +2270,12 @@ iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) "register connection's dev\n"); goto release_parent_ref; } - transport_register_device(&conn->dev); + err = transport_register_device(&conn->dev); + if (err) { + iscsi_cls_session_printk(KERN_ERR, session, "could not " + "register transport's dev\n"); + goto release_conn_ref; + } spin_lock_irqsave(&connlock, flags); list_add(&conn->conn_list, &connlist); @@ -2272,6 +2284,8 @@ iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid) ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n"); return conn; +release_conn_ref: + put_device(&conn->dev); release_parent_ref: put_device(&session->dev); free_conn: -- 2.24.1 -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/open-iscsi/20200106185817.640331-4-krisman%40collabora.com.
