when a user-space iSCSI tool invokes an option that is not supported
in the kernel, the tool returns "Iferror -38". Previously, this error
message was presented to users and could mislead them to think that
a problem existed with their iSCSI configuration. The iSCSI tools no longer
present this type of error to users and therefore do not create this
potential misunderstanding. Note that certain combinations of new tools
with old kernels might still produce a related "-22" error.