Re: [PATCH] scsi:iscsi: Record session's startup mode in kernel

[Mike Christie]

On 11/22/22 10:41 PM, Wenchao Hao wrote:
> Sorry I did not highlight the key points. The root reason we need to record
> node_startup mode in kernel is userspace's node_startup mode is unreliable in
> some scenarios:
> 
> 1. iscsi node and session is created in initrd, the configure files of these
>    nodes would be lost after we switch to rootfs
> 2. someone do iscsiadm -m discovery but did not specify the operation mode,
>    the iscsi node's node_startup would be updated to which specified in iscsid.conf
> 3. someone do iscsiadm -m node -o update to update nodes' configure
> 
> What's more, it seems "iscsiadm/iscsid" only refuse to logout of an ONBOOT
> session when logout is specificed by "--logoutall". We still can logout an
> ONBOOT session with "iscsiadm -m node -u comamnd".

logout_by_startup does go by the startup setting, but I think you missed the
session_in_use related code. It checks the mounts and holders already. Just
change it for whatever you need. I think your lvm use case should be covered
by the holder check. If not, add it.