Re: [Qemu-devel] [PATCH] iscsi: Add chap and "initiator-name" etc as per drive options

[Eric Blake <eblake@redhat.com>]

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On 09/11/2015 12:00 AM, Fam Zheng wrote:
> Previously we use "-iscsi id=target-iqn,user=foo,password=bar,..." to
> specify iscsi connection parameters, unfortunately it doesn't work with
> qemu-img.
> 
> This patch adds per drive options to iscsi driver so that at least
> qemu-img can use the "json:{...}" filename magic.
> 
> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---
>  block/iscsi.c | 83 +++++++++++++++++++++++++++++++++++++++++++++--------------
>  1 file changed, 64 insertions(+), 19 deletions(-)

It would be nice to also add a matching BlockdevOptionsIscsi to
qapi/block-core.json, to allow setting these structured options from
QMP.  Separate patch is fine, but we need to do the work for ALL of the
remaining block devices eventually, and now that you are structuring the
command line is a good time to think about it.


>  static void iscsi_nop_timed_event(void *opaque)
> @@ -1229,6 +1253,27 @@ static QemuOptsList runtime_opts = {
>              .name = "filename",
>              .type = QEMU_OPT_STRING,
>              .help = "URL to the iscsi image",
> +        },{
> +            .name = "user",
> +            .type = QEMU_OPT_STRING,
> +            .help = "username for CHAP authentication to target",
> +        },{
> +            .name = "password",
> +            .type = QEMU_OPT_STRING,
> +            .help = "password for CHAP authentication to target",
> +        },{

Also, this requires passing the password in the command line. We
_really_ need to solve the problem of allowing the password to be passed
via a fd or other QMP command, rather than on the command line.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


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